• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    SUMMARY OF METHOD FOR MANUFACTURING CONFORMED MATERIAL THE? DESCRIPTION OF A MATERIAL CONFORMED WITH A TUBULAR BODY AND A FLANGE FORMED IN AN END OF THE BODY THAT IS MANUFACTURED BY MULTI-STYLE STAMPING OF A PIECE OF METALLIC PLATE GROSS. MULTI-STYLE STAMPING INCLUDES PRELIMINARY STAMPING IN WHICH A PRELIMINARY BODY WITH A BODY PREFORM IS FORMED FROM THE METAL PLATE CRUDE PIECE, AND AT LEAST ONE COMPRESSION STAMPING THAT IS PERFORMED AFTER THE PRELIMINARY STAMPING IN WHICH THE BODY IS FORMED STAMPING THE BODY PREFORM DURING THE APPLICATION OF A COMPRESSIVE FORCE TO THE BODY PREFORM. AT LEAST ONE COMPRESSION STAMPING IS CARRIED OUT IN A WAY TO BE COMPLETED BEFORE THE PRESSURIZATION MEDIA BLOCK HITS THE DEAD CENTER OF THE BASE, AND A SUPPORTING STRENGTH THAT SUPPORTS THE PORTION OF THE BLOCK ACTS AS THE COMPRESSIVE FORCE IN THE BODY PREFORM WHEN THE BODY PREFORM IS PRINTED.
    公开号:BR112015020680B1
    申请号:R112015020680-8
    申请日:2014-11-07
    公开日:2020-12-08
    发明作者:Naofumi Nakamura；Yudai Yamamoto；Katsuhide Nishio
    申请人:Nisshin Steel Co., Ltd；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    [001] The present invention relates to a method of manufacturing shaped material to manufacture a shaped material with a tubular body and a flange formed at the end of the body. BACKGROUND OF THE INVENTION
    [002] As described, for example, in Non-Patent Document 1 and so on, a material formed with a tubular body and a part of the flange formed at an end part of the body is manufactured by carrying out a stamping process. Since the body is formed by stretching a blank of sheet metal in the stamping process, the thickness of the circumferential wall of the body is usually less than that of the blank. On the other hand, since the region of the metal plate corresponding to the flange contracts as a whole in response to the formation of the body, the thickness of the flange is greater than that of the raw plate.
    [003] The aforementioned shaped material can be used as the engine case described, for example, in Patent Document 1 and so on. In this case, the circumferential wall of the body is expected to function as a shielding material that prevents magnetic leakage to the outside of the engine housing. In some motor structures, the circumferential wall is also expected to function as a stator electromagnet. The performance of the circumferential wall as the shielding material or electromagnet is improved as its thickness increases. Therefore, when a shaped material is manufactured by stamping, as described here, a blank of sheet metal with a thickness greater than the required thickness of the circumferential wall is selected in consideration of the reduction in thickness caused by the stamping process. However, the flange is very often used to mount the motor housing to the mounting object. Therefore, the flange is expected to have some resistance.
    [004] With the aforementioned conventional shaped material manufacturing method, a material shaped with a tubular body and a flange formed at the end of the body is manufactured by stamping. Therefore, the thickness of the flange is greater than the thickness of the blank. As a result, the thickness required for the flange to demonstrate the expected performance is sometimes exceeded and the flange becomes unnecessarily thick. Additionally, due to the selection of a sheet metal blank with a thickness greater than the required thickness of the circumferential wall of the body, the thickness is unnecessarily increased to that of the top wall of the body which makes little contribution to the performance of the engine. . This means that the shaped material has its weight unnecessarily increased and is unsuitable for applications that require lightweight engine housings. Additionally, with the conventional method, once a relatively thick crude metallic material is used, the cost of the material is increased.
    [005] In this way, Patent Document 2 and so on describes a mold to perform compression stamping in a multistage stamping process as a means to prevent the body of the stamped element from decreasing in thickness.
    [006] In the compression stamping mold, a cylindrical element molded in a previous step is adapted, in a state where its opening part of the flange faces downwards, in a deformation prevention element provided in a lower mold, the opening part of the flange is positioned in a recess of the plate provided in the lower mold, and its outer periphery is fitted with the recess. An upper mold is then lowered and the cylindrical portion of the cylindrical element is snapped into a hole in the die provided in the upper mold, thereby inducing a compressive force and carrying out the compression stamping process.
    [007] Since the deformation prevention element in this case can be moved in the vertical direction with respect to the plate, the side wall of the cylindrical element practically does not receive traction force and can be prevented from having its thickness reduced.
    [008] The compressive force applied in this case to a body preform is equal to the resistance to deformation of the body preform at the moment of pressure fitting in the die hole. Thus, the factors that contribute to the thickening are the mold clearance between the die and the punch, the radius of the die shoulder, and the material resistance ((test tension) x (cross sectional area)) of the body preform which is mainly related to deformation resistance.
    [009] Non-Patent Document 1: “Basics of Plastic Forming”, Masao Murakawa and three others, First Edition, SANGYO-TOSHO Publishing Co. Ltd., January 16, 1990, pp. 104 to 107
    [0010] Patent Document 1: Publication of Japanese Patent Application No. 2013-51765
    [0011] Patent Document 2: Publication of Japanese Patent Application No. H4-43415 DESCRIPTION OF THE INVENTION
    [0012] However, with the compression stamping method such as the above, the cylindrical element is placed on a plate that is fixed in the lower mold, the cylindrical element is compressed between the plate and the matrix which is lowered from above and compressive force acts in the so-called upside-down state and increases the thickness of the sheet. Therefore, the compressive force applied to the preform of the body is equal to the resistance to deformation of the preform of the body that is generated during the fitting by pressure in the hole of the die.
    [0013] The factors that contribute to the increase in thickness are the mold clearance between the die and the punch, the radius of the die shoulder, and the material resistance [(test tension) x (cross sectional area)] of the preform of the body that is mainly related to the resistance to deformation, and the resistance to deformation generated in the preform of the body increases when the fitting by pressure in the hole of the die is difficult to perform. For example, where the mold clearance is considered, for example, when the mold clearance is increased in order to obtain a thick body preform, pressure fitting in the die hole is facilitated and the increase in thickness is otherwise, decreased. Thus, with the conventional compression stamping method implemented in the upside down state, the thickness cannot be increased equal to the mold clearance. In addition, where the above conditions that contribute to the increase in thickness have been determined, they are difficult to change. Therefore, it is practically impossible to control the degree of thickness increase during operation.
    [0014] The present invention was developed to solve the aforementioned problems, and it is an objective of the present invention to provide a method of manufacturing shaped material by which unnecessary thickness increase of the flange and top wall can be avoided, the method being flexibly adaptable changes in processing conditions or thickness of the sheet metal blank and capable of efficiently reducing the weight and cost of the formed material.
    [0015] The method of fabricating shaped material in accordance with the present invention is a method of fabricating shaped material to fabricate a shaped material with a tubular body and a flange, which is formed at an end part of the body, performing stamping in multistage of a sheet metal blank, in which the multistage stamping includes: preliminary stamping in which a preliminary body with a body preform is formed from the sheet metal blank; and at least one compression stamping which is performed after preliminary stamping using a mold including a die with a press hole, a punch inserted in the body preform to press the body preform into the press hole, and pressurizing means to apply a compressive force along a direction of the depth of the preform of the body in the preform of the body, and in which the body is formed by stamping the preform of the body during application of the compressive force in the preform of the body; the pressurizing means are a lifting block with a portion of the block that is arranged in the outer circumferential position of the punch so as to face the die and into which the body preform is placed, and a support portion that supports the portion of the block underneath and which is configured in such a way that a support force supporting the portion of the block can be adjusted; at least one compression stamping is performed to be completed before the block portion reaches the dead center of the base; and the supporting force acts as the compressive force on the body preform when stamping the body preform is performed.
    [0016] With the method of manufacturing material conformed to the present invention, the body is formed by stamping the body preform during application of the compressive force along the direction of the depth of the body preform in the body preform. As a result, reducing the thickness of the circumferential wall of the body caused by the stamping process can be avoided, and the thickness of the required circumferential wall can be ensured, even using a sheet metal blank that is thinner than in conventional methods. Additionally, since at least one compression stamping is performed in order to be completed before the block portion reaches the dead center of the base, and the adjustable support force of the support portion acts as the compressive force in the body preform. when the preform of the body is stamped, even when the processing conditions are changed or the thickness of the sheet metal blank is changed, the process can be flexibly adapted to these changes. As a result, unnecessary increases in flange thickness and top wall can be avoided, the process can be flexibly adapted to changes in processing conditions or thickness of the sheet metal blank, and the shaped material can have the weight and the cost of material efficiently reduced. BRIEF DESCRIPTION OF THE DRAWINGS
    [0017] FIG. 1 is a perspective view of a shaped material 1 manufactured by a method of making shaped material according to Mode 1 of the present invention;
    [0018] FIG. 2 illustrates a method of fabricating shaped material for fabricating the shaped material shown in FIG. 1;
    [0019] FIG. 3 illustrates a mold that is used in the preliminary printing shown in FIG. two;
    [0020] FIG. 4 illustrates the preliminary stamping performed with the mold shown in FIG. 3;
    [0021] FIG. 5 illustrates a mold that is used in the first compression stamping shown in FIG. two;
    [0022] FIG. 6 illustrates the first compression stamping performed with the mold shown in FIG. 5;
    [0023] FIG. 7 is a graph illustrating the relationship between the support force of a support portion in the first compression stamping and the average thickness of the circumferential wall of the body;
    [0024] FIG. 8 is a graph illustrating the relationship between the support force of the support portion in the second compression stamping and the average thickness of the circumferential wall of the body;
    [0025] FIG. 9 is a graph illustrating the relationship between the value of the compressive pressure during compression stamping, the radius of the boss shoulder, and the thickness of the body preform;
    [0026] FIG. 10 is a graph illustrating the thickness of the shaped material manufactured by the method of making shaped material of the present embodiment; and
    [0027] FIG. 11 illustrates the thickness measurement position in FIG. 10. BEST MODE FOR CARRYING OUT THE INVENTION
    [0028] Modalities of the present invention will be explained below with reference to the drawings. Mode 1
    [0029] FIG. 1 is a perspective view of the shaped material 1 manufactured by the method of making shaped material according to Mode 1 of the present invention. As shown in FIG. 1, the shaped material 1 manufactured by the shaped material manufacturing method of the present embodiment has a body 10 and a flange 11. Body 10 is a tubular part with a top wall 100 and a circumferential wall 101 extending from the outer edge of the top wall 100. Depending on the intended use of shaped material 1, the top wall 100 can also be referred to as a base wall or the like. In FIG. 1, the body 10 is shown with a round cross section, but the body 10 can also have another cross sectional shape, for example, an elliptical or angular cross section. The top wall 100 can also be further processed, for example, to form a projection protruding further from the top wall 100. The flange 11 is a plate-shaped portion formed at the end of the body 10 (end of the circumferential wall 101).
    [0030] FIG. 2 illustrates the method of making shaped material for making shaped material 1 shown in FIG. 1. With the method of manufacturing shaped material according to the present invention, shaped material 1 is manufactured by multi-stage stamping of a flat sheet metal blank 2. Multistage stamping includes preliminary stamping and at least one cycle compression stamping performed after preliminary stamping. In the method of manufacturing material conformed according to the present modality, three cycles of stamping by compression are performed (first third stamping by compression). A variety of sheet metal, such as cold rolled steel sheet, stainless steel sheet and metallized steel sheet, can be used.
    [0031] The preliminary stamping is a step to form a preliminary body 20 with a preform of the body 20a by subjecting the sheet metal blank 2 to stamping. The preform of the body 20a is a tubular body with a larger diameter and less depth than the body 10 shown in FIG. 1. The depth direction of the body preform 20a is defined by the direction of extension of the circumferential wall of the body preform 20a. In the present embodiment, the entire preliminary body 20 constitutes the preform of the body 20a. However, a body with a flange can also be formed as the preliminary body 20. In this case, the flange does not constitute the preform of the body 20a.
    [0032] As will be described in more detail below, the first to third compression stamping are the steps to form the body 10 by stamping the preform of the body 20a during the application of a compressive force 42a along the direction of the depth (see FIG. 5) from the body preform 20a to the body preform 20a. Stamping of the body preform 20a means reducing the diameter of the body preform 20a and additionally increasing the depth of the body preform 20a.
    [0033] FIG. 3 illustrates a mold 3 that is used in the preliminary embossing shown in FIG. 2, and FIG. 4 illustrates the preliminary printing carried out with the mold 3 shown in FIG. 3. As shown in FIG.3, the mold 3 that is used in the preliminary embossing includes a die 30, a punch 31, and a damping block 32. The die 30 is provided with a pressing hole 30a in which the part in sheet metal blank 2 is pressed together with the punch 31. The damping block 32 is arranged in the outer circumferential position of the punch 31, so that it faces the end surface of the die 30. As shown in FIG. 4, in the preliminary stamping, the outer edge portion of the sheet metal blank 2 is not completely constrained by the die 30 and the damping block 32, and the outer edge portion of the sheet metal blank 2 is stamped until that it be released from the restraint by the die 30 and the damping block 32. The entire sheet metal blank 2 can be pressed together with the punch 31 in the pressing hole 30a and stamped. As previously mentioned, where the preliminary body 20 with a flange is formed, the stamping can be interrupted at a depth at which the outer edge portion of the sheet metal blank 2 is further constrained by the die 30 and the damping block 32 .
    [0034] FIG. 5 illustrates a mold 4 which is used in the first compression stamping shown in FIG. 2. FIG. 6 illustrates the first compression stamping performed with the mold 4 shown in FIG. 5. As shown in FIG. 5, the mold 4 which is used in the first compression stamping includes a die 40, a punch 41 and a lifting block 42. The die 40 is an element with a pressing hole 40a. The punch 41 is a round columnar body which is inserted into the preform of the body 20a and presses the preform of the body 20a into the pressing hole 40a.
    [0035] The lifting block 42 is arranged in the outer circumferential position of the punch 41 so that it faces the matrix 40. More specifically, the lifting block 42 has a portion of the block 420 and a support portion 421. The portion of the block 420 is an annular element disposed in the outer circumferential position of the punch 41 so as to face the matrix 40. The support portion 421 is arranged below the portion of the block 420 and supports the portion of the block 420. The support portion 421 is constituted, for example, by a hydraulic or pneumatic cylinder and configured in such a way that the supporting force (lifting pressure) that supports the portion of block 420 can be adjusted.
    [0036] The preform of the body 20a is placed in the portion of the block 420. The circumferential wall of the preform of the body 20a is caught by the matrix 40 and the portion of the block 420 when the matrix 40 is lowered. The support force of the support portion 421 is a resistive force that acts against the lowering of the die 40 when the preform of the body 20a is stamped, and acts on the preform of the body 20a as a compressive force 42a along the direction of the depth to the body preform 20a. Thus, the lifting block 42 constitutes a pressure device for applying the compressive force 42a along the direction of the depth of the body preform 20a in the body preform 20a.
    [0037] As shown in FIG. 6, in the first compression stamping, as a result of this lowering of the die 40, the preform of the body 20a is pressed together with the punch 41 in the pressing hole 40a and the preform of the body 20a is stamped. A first compression stamping like this is carried out so as to be completed before the portion of block 420 reaches the dead center of the base. Dead center of the base of the block portion 420, as referred to herein, means a position in which the lowering of the block portion 420 is mechanically restricted. This position is defined by the structure of the support portion 421 or the position of the element that restricts the lowering of the block portion 420. In other words, the first compression stamping is performed in such a way that the block portion 420 does not reach the bottom . As a result of the first compression stamping to be completed before the block portion 420 reaches the dead center of the base, the support force of the support portion 421 acts as the compressive force 42a on the body preform 20a in the course of the first compression stamping. Thus, in the first compression stamping, the body preform 20a is stamped while the compressive force 42a is applied. Since the support portion 421 is configured in such a way that the support force can be adjusted, as mentioned above, the compressive force 42a can be adjusted by adjusting the support force. As will be explained in more detail below, where the compressive force 42a meets a predetermined condition, the preform of the body 20a can be stamped without causing warping or thickness reduction in the preform of the body 20a. As a result, the thickness of the preform of the body 20a that was subjected to the first pressing for compression is greater than or equal to the thickness of the preform of the body 20a before the first pressing for compression.
    [0038] Where the first compression stamping is performed after the portion of the block 420 has reached the dead center of the base, the resistance to deformation of the preform of the body 20a that occurs when the preform of the body 20a is pressed into the pressing hole 40a acts as a compressive force on the preform of the body 20a. This compressive force is defined by a mold clearance, a radius of the boss shoulder, and the strength of the body preform material 20a and is difficult to adjust. Thus, by using the configuration in which, as in the present embodiment, the stamping is completed before the portion of the block 420 reaches the dead center of the base, it is possible to easily adjust the compressive force 42a by adjusting the supporting force of the portion of support 421, and the increase / decrease in the thickness of the body preform 20a can be easily controlled by the compressive force 42a.
    [0039] The second and third compression stamping shown in FIG. 2 are performed using a mold with a configuration similar to the mold 4 shown in FIGS. 5 and 6. However, the dimensions of die 40 or punch 41 are changed accordingly. In the second compression stamping, the body preform 20a after the first compression stamping is stamped during application of the compressive force 42a. Additionally, in the third compression stamping, the body preform 20a after the second compression stamping is stamped during application of the compressive force 42a. The second and third compression stamping are each performed to be completed before the portion of block 420 reaches the dead center of the base.
    [0040] The preform of the body 20a is formed in the body 10 by such first to third compression stamping. The thickness of the circumferential wall 101 of the body 10 is preferably greater than or equal to at least one of the maximum thickness of the top wall 100 of the body 10 and the thickness of the sheet blank 2.
    [0041] An example is described below. The inventors used round plates (thickness 1.6 mm, 1.8 mm and 2.0 mm, diameter 116 mm) of cold-rolled plates of common steel that were metallized with Zn-Al-Mg as the plate blank metallic 2, and investigated the relationship between the support force value (compressive force 42a) of the support portion 421 during compression stamping and the average thickness (mm) of the circumferential wall of the body portion of the body preform 20a. The relationship between the value of the compressive force 42a during compression stamping, the radius of the boss shoulder (mm) and the thickness (mm) of the body preform 20a was also examined. The following processing conditions were used in this process. The results are shown in FIGS. 7 to 9.. Radius of curvature of the boss shoulder: 3 mm to 10 mm. . Punch diameter: 66 mm in the preliminary printing, 54 mm in the first pressing printing, 43 mm in the second pressing printing, and 36 mm in the third pressing printing. . Supporting force of the support portion 421: 0 kN to 100 kN. . Press oil: TN-20N.
    [0042] FIG. 7 is a graph illustrating the relationship between the support force of the support portion 421 in the first compression stamping and the average thickness of the circumferential wall of the body. In FIG. 7, the average thickness of the circumferential body wall after the first compression stamping is plotted in the ordinate, and the supporting force (kN) of the support portion 421 in the first compression stamping is plotted on the abscissa. The average thickness of the circumferential wall of the body referred to here is obtained by averaging the thickness of the circumferential wall of the stop R of the punching shoulder radius on the flange side to the R stop of the punching shoulder radius on the side of the punch wall. top.
    [0043] It is clear from FIG. 7 that the average thickness of the circumferential wall of the body increases linearly with the increase in the support force of the support portion 421 in the first compression stamping. It is also clear that where the support force of the support portion 421 in the first compression stamping is made greater than or equal to about 15 kN, the average thickness of the circumferential wall of the body is increased in relation to that of the preliminary stamping step, which is the previous step.
    [0044] FIG. 8 is a graph illustrating the relationship between the support force of the support portion 421 in the second compression stamping and the average thickness of the circumferential wall of the body. In FIG. 8, the average thickness of the circumferential body wall after the second compression stamping is plotted in the ordinate, and the support force (kN) of the support portion 421 in the second compression stamping is plotted on the abscissa. In the second compression stamping, the average thickness of the circumferential wall of the body increases linearly with the increase in the support force of the support portion 421 in the same way as in the first compression stamping.
    [0045] However, when the body preform 20a, which was shaped by a support force of 50 kN from the support portion 421 in the first compression stamping, was actuated by the support force of about 30 kN from the support portion 421 in the second compression stamping, the sheet thickness was increased to substantially equal to the mold clearance. Where the support force was additionally increased, the thickness of the sheet remained the same. This result indicates that by adjusting (increasing) the support force of the support portion 421, it is possible to increase the thickness of the preform of the body 20a to a value equal to the clearance of the mold. It is clear that, in the second compression stamping, where the support force of the support portion 421 is greater than or equal to about 15 kN, the average thickness of the circumferential wall of the body increases in relation to that of the first compression stamping which is the previous step.
    [0046] FIG. 9 is a graph illustrating the relationship between the value of the compressive pressure during compression stamping, the radius of the boss shoulder and the thickness of the body preform 20a. In FIG. 7, the compressive pressure (a value obtained by dividing the compressive force 42a applied to the body preform 20a by the cross sectional area of the circumferential wall of the body preform 20a) (N / mm2) is plotted in the ordinate, and a value obtained by dividing the radius of the die shoulder (mm) by the thickness (mm) of the body preform 20a [(radius of the matrix shoulder (mm)) / (thickness (mm) of the circumferential wall of the body preform 20a before embossing using compressive strength)] is plotted on the abscissa.
    [0047] The cross sectional area of the circumferential wall by which the compressive force 42a is divided here means the cross sectional area of the circumferential wall that has the smallest thickness (minimum thickness portion of the circumferential wall). This is due to the fact that the minimum thickness portion of the circumferential wall is more affected by the warping caused by the compressive force 42a. The minimum thickness portion of the circumferential wall can be located in the center of the circumferential wall along the depth direction or on its periphery. This is due to the fact that the portion area in which one transitions from the top wall to the circumferential wall to the vicinity of the center of the circumferential wall is actuated by a tensile force in the printing process and its thickness decreases, whereas the area near the center of the circumferential wall until the end of the flange is actuated by the compressive force caused by the deformation caused by the contraction of the flange and its thickness increases. Similarly, the thickness of the circumferential wall of the body preform 20a, by which the radius of the boss shoulder is divided, also means the minimum thickness of the circumferential wall.
    [0048] Where the compressive pressure denoted by P and the ratio of the radius of the boss shoulder (mm) to the thickness (mm) of the circumferential wall of the body preform 20a denoted by x, where the compressive pressure takes a value above the curve represented by P = 130x0.3, warping occurred in the preform of the body 20a and a solid shaped material 1 could not be obtained. Additionally, where the compressive pressure takes a value below the curve represented by P = 163x-1.2, the decrease in the thickness of the preform of the body 20a caused by the stamping process could not be suppressed.
    [0049] Thus, it is clear that, where the condition 163x-1.2 <P <130x0.3 is satisfied in each step of compression stamping, it is possible to stamp the preform of the body 20a without causing warping or thickness reduction in the body preform 20th. This result makes it clear that it is preferred that the compressive pressure during each compression stamping step satisfies the condition 163x-1.2 <P <130x0.3. In addition, "the thickness of the circumferential wall of the preform of the body 20a before the embossing performed by applying the compressive force", referred to here, means the thickness of the circumferential wall of the preform of the body 20a after the preliminary embossing and before the first compression embossing when the compressive pressure of the first compression stamping is determined, means the thickness of the circumferential wall of the body preform 20a after the first compression stamping and before the second compression stamping when the compressive pressure of the second compression stamping is determined, and means the thickness from the circumferential wall of the body preform 20a after the second compression stamping and before the third compression stamping when the compressive pressure of the third compression stamping is determined.
    [0050] When the compressive pressure takes a value on the curve represented by P = 130x0.3 or P = 163x-1.2, the thickness of the circumferential wall of the body preform 20a then the compression stamping was approximately the same thickness as the circumferential wall of the preform of the body 20a before compression printing. When the compressive pressure satisfied the condition 163x-1.2 <P <130x0.3, the thickness of the circumferential wall of the body preform 20a after the compression stamping was greater than the thickness of the circumferential wall of the body preform 20a before the compression stamping .
    [0051] Molding is impossible in a region with a small x (= (radius of the matrix shoulder (mm)) / (thickness (mm) of the body preform 20a)) for the following reason. Since the radius of the die shoulder is less than the thickness of the circumferential wall of the body preform 20a, the resistance to deformation by folding-unfolding at the moment the material passes through the die shoulder is large and the reduction in thickness easily advances, which apparently results in a wide region of reduced thickness.
    [0052] FIG. 10 is a graph illustrating the thickness of the shaped material manufactured by the method of making shaped material of the present embodiment. FIG. 11 illustrates the thickness measurement position in FIG. 10. The inventors used a round sheet (thickness 1.6 mm, diameter 116 mm) of a cold-rolled sheet of normal steel that was metallized with Zn-Al-Mg as the sheet metal blank 2, and tried to manufacture a 1.6 mm thick shaped material on the circumferential wall 101 of the body 10. As shown in FIG. 10, it was confirmed that, using the method of fabricating shaped material of the present modality, it is possible to manufacture a shaped material with a thickness (thickness in a measurement position of 30 mm to 80 mm) of the circumferential wall 101 of 1.6 mm using sheet metal blank 2 with a thickness of 1.6 mm. It has also been confirmed that a shaped material can be manufactured in which the circumferential wall 101 (thickness in a measurement position from 30 mm to 80 mm) has a thickness greater than the maximum thickness (maximum thickness in a measurement position from 0 mm to 29 mm) of the top wall 100.
    [0053] Additionally, as shown in FIG. 10, with the conventional method (the usual multi-stage stamping in which the compressive force 42a is not applied), a sheet metal sheet 2 with a thickness of 2.0 mm is necessary to manufacture the material conformed to a wall thickness 1.6 mm circumferential 101. The thickness of the flange of the shaped material (example of the present invention) manufactured by the conventional method is greater than the thickness of the flange of the shaped material (the present invention) manufactured by the method of manufacturing the shaped material of the present embodiment. Additionally, the thickness of the top wall in the conventional example is greater than the thickness of the top wall 100 in the example of the present invention. This is the result of the difference in thickness between the raw metal sheets 2 that are used in the two examples. Thus, by manufacturing a material conformed by the method of fabricating conformed material of the present embodiment, it is possible to prevent the flange thickness from decreasing unnecessarily. The weight in the example of the present invention has been reduced by about 10% over that of the conventional example.
    [0054] With a method of manufacturing shaped material like this, the body 10 is formed by stamping the preform of the body 20a during application of the compressive force 42a along the direction of the depth of the preform of the body 20a in the body preform 20a. As a result, reducing the thickness of the body 10 caused by the stamping process can be avoided, and the required body thickness 10 can be ensured, even using a sheet metal blank 2 which is thinner than in conventional methods. In addition, since the first to third compression stamping are performed so as to be completed before the block portion 420 reaches the dead center of the base, and the adjustable support force of the support portion 421 acts as the compressive force 42a in the preform of the body 20a when the preform of the body 20a is stamped, even when the processing conditions are changed or the thickness of the sheet metal blank is changed, the process can be flexibly adapted to these changes. As a result, unnecessary increases in the thickness of the flange 11 can be avoided, the process can be flexibly adapted to changes in the processing conditions or thickness of the sheet metal blank 2, and the shaped material 1 can be efficiently reduced in weight. The present features are particularly suitable in applications where weight reduction of the shaped material is required, such as engine housings. In addition, while the weight of the shaped material 1 is reduced, the material cost can also be reduced.
    [0055] Where the compressive force 42a is denoted by P and the ratio of the radius of the boss shoulder (mm) to the thickness (mm) of the circumferential wall of the body preform 20a before the compressive force 42a is applied and the stamping is performed is denoted by x, the condition of 163x-1.2 <P <130x0.3 is satisfied. The preform of the body 20a can be stamped without causing warping and thickness reduction in the preform of the body 20a.
    [0056] Additionally, since the thickness of the circumferential wall 101 is greater than or equal to at least one of the thickness of the sheet metal blank 2 and the maximum thickness of the top wall 100, the preform of the body 20a can be stamped still avoiding unnecessary thickness increase of the top wall 100 and the flange 11, even when a thin sheet metal blank 2 is used.
    [0057] In the modality, a case is explained in which the compression stamping is performed in three stages, but the number of stages of compression stamping can be changed, as appropriate, according to the size of the shaped material 1 or the required dimensional accuracy.
    权利要求:
    Claims (3)
    [0001]
    1. Method for manufacturing shaped material to manufacture a shaped material (1) having a tubular body (10) and a flange (11), which is formed in an end part of the body (10), performing multi-stage stamping of a sheet metal blank (2), where: multi-stage stamping includes: preliminary stamping in which a preliminary body (20) with a body preform (20a) is formed from the sheet metal blank (2 ); and at least one compression stamping which is carried out after preliminary stamping using a mold (4) including a die (40) with a pressing hole (40a), a punch (41) inserted in the body preform (20a) to press the body preform (20a) in the pressing hole (40a), and pressurizing means (42) to apply a compressive force (42a) along a direction of the depth of the body preform (20a) to a circumferential wall of the preform of the body (20a), and in which the body (10) is formed by stamping the preform of the body (20a) during application of the compressive force (42a) to a circumferential wall of the preform of the body (20a); characterized by the fact that the pressurization means (42) are an elevation block (42) having a portion of the block (420) that is arranged in the outer circumferential position of the punch (41) so that it faces the die (40) and in which a lower end of the circumferential wall of the body preform (20a) is placed, and a support portion (421) that supports the portion of the block (420) underneath and that is configured in such a way that a supporting force supporting the portion of the block (420) can be adjusted; at least one compression stamping is performed to be completed before the block portion (420) reaches the dead center of the base; and the supporting force acts as the compressive force (42a) on the circumferential wall of the body preform (20a) when the stamping of the body preform (20a) is performed.
    [0002]
    2. Method for manufacturing shaped material according to claim 1, characterized by the fact that where a value (N / mm2) obtained by dividing the compressive force (42a) applied to the circumferential wall of the preform of the body preform (20a) by a cross-sectional area of a circumferential wall of the body preform (20a) is denoted by P and a ratio of the radius of the boss shoulder (mm) to the thickness (mm) of the circumferential wall of the body preform (20a) before the compressive force (42a) is applied and the stamping is performed is denoted by x, 163x-1.2 <P <130x0.3 is satisfied.
    [0003]
    3. Method for manufacturing shaped material according to either of claims 1 or 2, characterized in that: the body (10) includes a top wall (100) and a circumferential wall (101) an outer edge of the top wall (100); and the thickness of the circumferential wall (101) of the body is greater than or equal to at least one of the maximum thickness of the top wall (100) of the body (10) and the thickness of the sheet blank (2).
    类似技术:
    公开号 | 公开日 | 专利标题
    BR112015020680B1|2020-12-08|method for manufacturing shaped material
    BR112017020581B1|2021-06-29|METHOD OF MANUFACTURING FORMED MATERIAL
    BR112015018230B1|2021-05-18|method for making a shaped material
    BR112016028168B1|2021-06-08|method for manufacturing formed material
    TWI694876B|2020-06-01|Formed material manufacturing method
    JP5559926B1|2014-07-23|Anchor member and manufacturing method thereof
    JP2016196014A|2016-11-24|Press working device
    RU2016125149A|2018-02-01|VEHICLE BODY STRUCTURE ELEMENT, DEVICE FOR ITS MANUFACTURE AND METHOD FOR ITS MANUFACTURE
    KR101920609B1|2019-02-08|Molding material manufacturing method
    KR102022835B1|2019-09-18|Molding method manufacturing method and molding material
    KR101543847B1|2015-08-11|Forming apparatus and method for burning
    RU2580269C1|2016-04-10|Device for folding and forming of thin-wall conical workpiece
    JP2021130120A|2021-09-09|Press device and method of manufacturing member
    JP2020127957A|2020-08-27|Molding method and molding apparatus for annular members
    JP5656232B2|2015-01-21|Design method for forging die for drilling and forging die for drilling
    JP5407295B2|2014-02-05|Press-molded product, press-molded product manufacturing method and manufacturing apparatus
    同族专利:
    公开号 | 公开日
    PH12015501690A1|2015-10-19|
    KR20150143452A|2015-12-23|
    EA027227B1|2017-07-31|
    US20160144418A1|2016-05-26|
    PH12015501690B1|2015-10-19|
    EP2974808A1|2016-01-20|
    SG11201507206TA|2015-12-30|
    TW201544207A|2015-12-01|
    JP5697787B1|2015-04-08|
    MX2015010370A|2016-03-04|
    JP2016000427A|2016-01-07|
    CA2904860C|2017-11-21|
    WO2015177946A1|2015-11-26|
    EA201591437A1|2016-03-31|
    HUE035642T2|2018-05-28|
    BR112015020680A2|2017-07-18|
    EP2974808B1|2017-09-06|
    EP2974808A4|2016-09-14|
    CN105246611B|2017-04-05|
    MX356420B|2018-05-29|
    TWI617372B|2018-03-11|
    US9901970B2|2018-02-27|
    CN105246611A|2016-01-13|
    CA2904860A1|2015-11-19|
    PT2974808T|2017-10-16|
    KR101581652B1|2015-12-31|
    RS56573B1|2018-02-28|
    AU2014382225B1|2015-11-26|
    MY160985A|2017-03-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4263800A|1979-03-26|1981-04-28|Reynolds Metals Company|Method of forming a nestable container|
    GB2061790B|1979-10-31|1983-08-24|Metal Box Co Ltd|Redrawing|
    JPS646996Y2|1984-03-07|1989-02-23|
    SU1355326A1|1986-04-11|1987-11-30|Калужский Филиал Мвту Им.Н.Э.Баумана|Arrangement for stamping|
    JPH0443415A|1990-06-08|1992-02-13|Ricoh Co Ltd|Central processing unit|
    JP2512209Y2|1990-08-10|1996-09-25|アイダエンジニアリング株式会社|Compression drawing mold|
    JP2812201B2|1994-07-15|1998-10-22|トヨタ自動車株式会社|Press equipment|
    JP3364124B2|1997-08-27|2003-01-08|本田技研工業株式会社|Manufacturing method of bossed drum|
    JP3425068B2|1997-09-24|2003-07-07|アイダエンジニアリング株式会社|Method and apparatus for forming stepped cup-shaped member with flange|
    JP3415033B2|1998-06-24|2003-06-09|アスモ株式会社|Mold for thickening drawing and method of manufacturing yoke|
    JP3634999B2|2000-03-16|2005-03-30|小島プレス工業株式会社|Metal product molding method and molding die used therefor|
    JP4397503B2|2000-03-30|2010-01-13|アスモ株式会社|Method for manufacturing a yoke of a rotating electric machine|
    CN101259500A|2007-03-06|2008-09-10|长春市吉韩模具有限公司|Scaly-type pressure-adjustable covering part blank holder device|
    CN101530880A|2008-03-11|2009-09-16|鸿富锦精密工业（深圳）有限公司|Mould and processing machine using same|
    JP5244529B2|2008-10-09|2013-07-24|しのはらプレスサービス株式会社|Thickening press processing method with vertical press|
    CN105234237B|2009-10-21|2018-07-20|斯多里机械有限责任公司|Container and the cup and their manufacture tool and correlation technique being formed selectively|
    DE102009059197A1|2009-12-17|2011-06-22|ThyssenKrupp Steel Europe AG, 47166|Method and device for producing a half-shell part|
    JP2013051765A|2011-08-30|2013-03-14|Minebea Motor Manufacturing Corp|Dc motor|JP6242363B2|2015-03-31|2017-12-06|日新製鋼株式会社|Molding material manufacturing method|
    PL3401033T3|2016-02-23|2021-01-25|Nippon Steel Corporation|Molded material production method and molded material|
    US10456820B2|2016-03-03|2019-10-29|Nippon Steel Nisshin Co., Ltd.|Method for manufacturing molded member|
    US10668516B2|2016-09-01|2020-06-02|Fca Us Llc|Post-compression for springback reduction|
    JP6787013B2|2016-10-03|2020-11-18|日本製鉄株式会社|Molding material manufacturing method|
    US11072730B2|2016-12-16|2021-07-27|Denka Company Limited|Composition having excellent adhesiveness to polyolefins|
    JP6901772B2|2017-10-11|2021-07-14|日伸工業株式会社|Press equipment|
    JPWO2020184480A1|2019-03-14|2021-12-02|日本製鉄株式会社|Molding material manufacturing method and molding mold|
    CN110449516B|2019-08-15|2021-02-19|安徽工业大学|Deep barrel anti-wrinkling drawing die and process|
    CN110976606B|2019-11-19|2021-06-11|苏州三维精密金属制品有限公司|Special-shaped part stretching process and stretching equipment|
    CN113182474A|2021-04-09|2021-07-30|中北大学|Forming method of cylinder workpiece with transverse inner ribs|
    CN113458232A|2021-07-08|2021-10-01|东莞市建星实业有限公司|Tensile bucket production system|
    法律状态:
    2018-11-06| B06F| Objections, documents and/or translations needed after an examination request according art. 34 industrial property law|
    2019-12-24| B06U| Preliminary requirement: requests with searches performed by other patent offices: suspension of the patent application procedure|
    2020-10-13| B09A| Decision: intention to grant|
    2020-12-08| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 07/11/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2014-102968|2014-05-19|
    JP2014102968|2014-05-19|
    JP2014-180047|2014-09-04|
    JP2014180047A|JP5697787B1|2014-05-19|2014-09-04|Molding material manufacturing method|
    PCT/JP2014/079527|WO2015177946A1|2014-05-19|2014-11-07|Method for manufacturing molded material|
    [返回顶部]