• 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:
    A closing device preferably usable for transverse extrusion of a workpiece (W) comprises a die (10, 20) consisting of a first die part (10) and a second die part (20). The first die part (10) and the second die part (20) are movable relative to each other for closing the die along a movement axis (A) and for opening the die along the movement axis (A) relative to each other. The second die part (20) is displaceably arranged in the direction of the movement axis (A) against the supporting force of a resilient support arrangement (34, 35, 39, 41, 42, 70, 71, M) from an initial position to an end position. The support assembly comprises a closed liquid chamber (34, 39, 71, 70) completely filled with an elastically compressible liquid pressure medium (M), the pressure medium (M) supporting the second mold part (20). On the one hand, the printing medium (M) is compressible by displacement of the second mold part (20) from its initial position to its end position and, on the other hand, the second mold part (20) is displaceable back from its end position to its initial position by expansion of the printing medium (M).
    公开号:CH712553A1
    申请号:CH00759/16
    申请日:2016-06-14
    公开日:2017-12-15
    发明作者:Vulcan Mihai
    申请人:Hatebur Umformmaschinen Ag；
    IPC主号:
    专利说明:

    Description: [0001] The invention relates to a closing device, preferably for transverse extrusion of a workpiece, according to the preamble of patent claim 1.
    A closing device of the generic type is known e.g. described in DE 19 922 660 B4. This known closing device comprises a first movable press die and a second press die, wherein both press dies are movable relative to each other, and at least one movable relative to the press dies die consisting of two die halves. The first die half is supported on a first support plate, and the second die half is resiliently supported on a movable second support plate which receives the second press die. Between the first die half and the first support plate is coaxial to the ram axis first annular piston nitrogen gas pressure spring and between the second Matrizenhälfte and the second support plate is coaxial to the ram axis second annular piston nitrogen gas pressure spring arranged. During operation of the closing device, the two die halves are tensioned due to the effect of an external pressing force. After reduction or elimination of the external pressing force, the gas springs relax again. The resilient support of the die halves by means of ring-piston gas springs is structurally complex and also requires a relatively large volume of construction. Other known closing devices have disk springs for the resilient support of the die halves. These also require a relatively large volume of construction.
    Against this background, the invention has the object to improve a closing device of the generic type with respect to the resilient support of a movable mold part. In particular, a comparison with known locking devices structurally less complex and a smaller volume requiring resilient support to be achieved.
    This object is achieved by the inventive closing device, as defined in independent claim 1. Particularly advantageous developments and refinements of the invention will become apparent from the dependent claims.
    The essence of the invention consists in the following: A closing device, preferably for cross-extrusion of a workpiece, comprising a first female part and a second female part having die, wherein the first female part and the second female part for closing the die along a movement axis relative to each other and movable relative to each other to open the die along the axis of movement. The second female part is slidably disposed in the direction of the movement axis against the supporting force of a resilient support arrangement from an initial position to an end position. The support structure for the second female part comprises a closed liquid chamber completely filled with an elastically compressible liquid pressure medium, the pressure medium supporting the second female part. On the one hand, the pressure medium is compressible by displacement of the second female part from its initial position to its end position, and on the other hand, the second female part is displaced back from its end position to its initial position by expansion of the pressure medium.
    That the first female part and the second female part for closing the die along a movement axis relative to each other and for opening the die along the movement axis are relatively movable away from each other, means that either the first female part or the second female part or both along the Movement axis are movable.
    Due to the special design of the resilient support arrangement, the closing device is structurally relatively simple and requires a small volume of construction. An advantage of liquid pressure medium in comparison to gas is a generally much higher compression modulus, whereby the travel can be kept relatively small even at high pressures. Another advantage over gas springs is that the liquid does not heat up significantly during compression and does not cool significantly during expansion.
    Advantageously, the support assembly on a in a filled with the liquid pressure medium piston chamber slidably disposed support piston, which supports the second female part. Expediently, the second female part is supported indirectly via at least one support member on the support piston. The resilient support means of the support piston is structurally relatively simple.
    Advantageously, the piston chamber is formed as an outer boundary wall and an inner boundary wall having annular chamber and the support piston is designed as an annular piston. This design allows the space enclosed by the inner boundary wall to be used for housing other device components.
    Conveniently, the support piston against the outer and the inner boundary wall of the piston chamber is sealed by means of sealing elements. As a result, the pressure medium is sealed in the liquid chamber.
    Preferably, with smaller dimensions of the closing device, the support piston can be sealed by means of annular gap seals against the outer and the inner boundary wall of the piston chamber. As a result, the design effort is reduced.
    Conveniently, the piston chamber has a standing in communicating communication with a pressure vessel interior part, said interior part of the piston chamber and the pressure vessel including all connecting lines are completely filled with the pressure medium. By appropriate dimensioning of the pressure vessel, the resilient support effect can be optimally adjusted.
    Advantageously, the pressure vessel has means for adjusting the volume of the pressure vessel. As a result, the pressure vessel can be easily adapted to the respective requirements.
    Conveniently, the closing device has a first along the axis of movement movable ram and the first female part is formed or fixed to the first ram. This is structurally relatively easy to implement.
    Advantageously, the closing device on a relative to the first ram along the movement axis adjustable holding member for holding a workpiece. This allows a secure positioning of the workpiece before the pressing process.
    Advantageously, the closing device has a second movable along the axis of movement punch and the second ram is slidably mounted in a space enclosed by the inner boundary wall of the piston chamber space relative to the second female part. The second press die supports the forming process.
    Conveniently, the second female part encloses a portion of the second ram ring. This allows penetration of the section into the second die part and reshaping of the workpiece located in the die by the second die.
    Conveniently, the closing device comprises an ejection member for moving the second press ram and thereby causing expulsion of a workpiece from the second female part.
    Preferably, the pressure medium is water or hydraulic oil. Water and hydraulic oil have a much higher compression modulus compared to gas, so that the travel can be kept relatively small even at high pressures.
    In the following the invention will be described in more detail with reference to embodiments shown in the drawings. Show it:
    FIGS. 1-9 each show an axial section through a first exemplary embodiment of the closing device according to the invention in different operating phases;
    10 shows an axial section analogous to FIG. 1 through a second exemplary embodiment of the closing device according to the invention; and
    11 is an axial section of a detail variant.
    For the following description, the following definition applies: If in a figure for the sake of clarity of the drawing reference numbers are given, but not mentioned in the directly associated part of the description, reference is made to their explanation in the preceding or following description parts. Conversely, less relevant reference numerals are not included in all figures to avoid overcharging graphic for the immediate understanding. For this purpose, reference is made to the other figures.
    The closing device shown in FIGS. 1-9 comprises a stationary mounting plate 1, on which a piston chamber block 30 is mounted. The piston chamber block 30 comprises an end plate 31 and two tubes 32 and 33 which are coaxial with respect to a movement axis A and define between them an annular piston chamber 34 and form an outer or an inner boundary wall of the piston chamber 34. In the piston chamber 34 designed as an annular piston support piston 35 is slidably mounted in the direction of the movement axis A. The support piston 35 is sealed by means of e.g. sealed in the form of sealing rings 36 and 37 with respect to the outer boundary wall 32 and the inner boundary wall 33 of the piston chamber 34. On the opposite side of the end plate 31, the annular piston chamber 34 is closed by an annular end wall 38, wherein the outer tube or the outer boundary wall 32 of the piston chamber 34 extends axially beyond the end wall 38 also.
    With the annular support piston 35, two bolt-shaped support members 41 and 42 are connected, which extend parallel to the movement axis A through unspecified openings in the end wall 38 into the space enclosed by the projecting portion of the outer boundary wall 32 of the piston chamber 34 space. It could also more than two support members are distributed around the movement axis A, and the two bolt-shaped support members could also be replaced by an annular support member.
    In the foremost region of the projecting portion of the outer boundary wall 32 of the piston chamber 34, a second female part 20 of a two-part die in the direction of the movement axis A is arranged axially displaceable. The second die part 20 comprises an annular die base 21 and a likewise annular die insert 22.
    In the from the inner Rohrbzw. the inner boundary wall 33 of the piston chamber 34 enclosed interior, a second ram 51 is arranged axially displaceable. A tapered portion 52 of the second ram 51 projects into the second female part 20. The second female part 20 encloses the tapered portion 52 annularly and is slidably disposed relative to the tapered portion 52. In the initial configuration of the closing device shown in FIG. 1, the front end 53 of the tapered portion 52 of the second ram 51 is located minimally (in the figure on the right) of the front end surface 23 of the die base 21.
    The closing device further comprises a first die part 10 and a first punch 11, which is arranged on a mounting plate 13. The first female part 10 is formed here in the embodiment by the provided with a hollow embossment 12 front end of the first ram 11. Alternatively, the first female part 10 could also be formed as an independent part and arranged at the front end of the first ram 11. The first female part 10, the first ram 11 and the mounting plate 13 have unspecified coaxial passages in which a rod-shaped holding member 14 is reciprocally slidably mounted in the direction of the movement axis A.
    The closing device also has a substantially rod-shaped ejection member 60 which is slidably mounted in an unspecified guide opening in the end plate 31 of the piston chamber block 30 in the direction of the movement axis A and kinematically connected to shock with the rear end face of the second press ram 51 is.
    Furthermore, the closing device has, for example, a cylindrical (high) pressure container 70, which communicates with the piston chamber 34 via a connecting line 71 and a connection opening 39 in the end plate 31 of the piston chamber block 30. The pressure vessel 70, the connecting line 71, the connection opening 39 and the part of the piston chamber 34 communicating therewith form a closed fluid chamber which is completely filled with an elastically compressible liquid pressure medium M. The liquid pressure medium may e.g. Water or a hydraulic fluid (hydraulic oil).
    In a detail variant shown schematically in Fig. 11, the pressure vessel 70 'is equipped with a piston 72 adjustably arranged in it, the piston rod 73 is guided through a wall of the pressure vessel 70' through to the outside. By adjusting the piston 72, the effective volume of the pressure vessel 70 'can be adjusted according to the respective requirements. During operation of the closing device, the effective volume of the pressure vessel 70 'is normally no longer adjusted. The adjustability of the piston 72 is symbolized by the double arrow 74.
    The first plunger 11 is driven together with the formed on it first female part 10 by means of the mounting plate 13 in the direction of the movement axis A on the second female part 20 and movable away from it. The corresponding drive means are symbolized by a double arrow 15. The rod-shaped holding member 14 is independent of the first ram 11 in the direction of the movement axis A to the second female part 20 and driven to move away from it. The corresponding drive means are symbolized by a double arrow 16. The ejection member 60 is driven in the direction of the movement axis A on the second female part 20 and movable away from it. The corresponding drive means are symbolized by a double arrow 61.
    The functioning of the closing device is as follows: In the initial constellation, all components of the device are in the positions shown in FIG. The illustrated position of the second female part 20 is its already mentioned above initial position.
    In Fig. 2, a (preformed) workpiece W is positioned in front of the second female part 20 and is held there by the advanced holding member 14.
    In the next operating phase (FIG. 3), the first ram 11 with the first female part 10 is moved toward the second female part 20 by applying a corresponding external pressing force, the first female part 10 still not completely closing the second female part 20 , The workpiece W is pressed into the second female part 20, whereby the second ram 51 inwardly, i. partially displaced out of the second female part 20 out. At the same time, the ejection member 60 (in the figure) is shifted to the left.
    In the next operating phase (FIG. 4), the first ram 11 with the first female part 10 is advanced so far until the female part is completely closed. In this case, there is already a first transformation (transverse extrusion) of the workpiece. The second ram 51 and the ejector 60 are thereby moved further to the left.
    In the next operating phase (FIG. 5), the first ram 11 with the first female part 10 is advanced even further, the second ram part 20 being moved inwards, and the second ram 51 finally being in abutment with the end plate 31 of the piston chamber block 30 comes. The second female part 20 is resiliently supported by the support members 41 and 42 and the annular support piston 35 at the liquid pressure medium M located in the piston chamber 34. This cushioning takes place by compression of the pressure medium M in the extent given by the compression modulus of the pressure medium M. In this step, a further deformation of the workpiece W in the closed die takes place.
    权利要求:
    Claims (14)
    [1]
    In the next operating phase (FIG. 6), the entire die with its two die parts 10 and 20 is pressed further against the resilient support by the pressure medium inwards (in the direction of the end plate 31). The second female part 20 is now in its already mentioned end position. The second ram 51 protruding on the face plate 31 can not move further inwardly, so that its front portion 52 penetrates into the second female part 20 and urges the workpiece W in the female mold, thereby forming it into its final shape. In the next operating phase (FIGS. 7 and 8), the external pressing force acting on the first pressing die 11 and thus also on the second die part 20 is reduced (or completely removed). The compressed pressure medium M can relax and drives via the support piston 35 and the support members 41 and 42, the two die parts 10 and 20 (in the figures) to the right until the second female part 20 has reached its initial position shown in FIG. The second ram 51 initially remains in its position. In the last operating phase (FIG. 9), the first pressing die 11 is moved together with the first die part 10 to the right, thereby opening the die. At the same time or subsequently, the ejection element 60 is moved in the direction of the second die part 20. As a result, the second ram 51 is advanced accordingly and pushes the finished formed workpiece W out of the second female part 20. The holding member 14 temporarily engages in the finished formed workpiece W and holds it in position until it is transported away. Thereafter, the closing device is back in its Ausgangskonstellation and is ready for the transformation of another workpiece. In Fig. 10, a second embodiment of the inventive closing device is shown. This embodiment differs from the embodiment of FIGS. 1-9 only by the type of sealing of the annular support piston 35 relative to the boundary walls 32 and 33 of the piston chamber 34 of the piston chamber block 30. The support piston 35 is in this embodiment by means of annular gap seals 81 and 82 relative to the outer Border wall 32 and the inner boundary wall 33 sealed. This type of seal is advantageous because of its constructive simplicity, especially with smaller dimensions of the closing device. All other components of the closing device are identical to those of the embodiment of FIGS. 1-9 and are therefore also denoted by the same reference numerals. The operation of the closing device of FIG. 10 is identical to the operation of the closing device of FIGS. 1-9. The resilient support of the second female part 20 via the support members 41 and 42 and the support piston 35 through the enclosed in the piston chamber 34, in the connection port 39, in the connecting line 71 and in the pressure vessel 70 elastically compressible liquid pressure medium M is substantially through determines the compression modulus of the pressure medium. For water, the compression modulus is about 2000 MPa, for hydraulic oil about 1600 MPa. The compression modulus depends on pressure and temperature. For a desired displacement of the second female part 20 from the position shown in Fig. 1 to the position shown in Fig. 6, a certain volume reduction (compression) of the printing medium M is required. The required compression pressure can be calculated based on the compression modulus of the pressure medium, based on a replacement compression modulus (eg 2000 MPa for water or 1600 MPa for hydraulic oil) and compensates for the relatively inaccurate value of the replacement compression module by oversizing the pressure vessel becomes. It is advantageous if the active, i. filled with pressure medium volume of the pressure vessel as shown in Fig. 11 is adjustable. After the optimum volume setting of the pressure vessel is found, the filling volume of the pressure vessel is not adjusted during operation of the closing device. To the above-described closing device further constructive variations can be realized. It should be expressly mentioned here that the closing device, instead of the external pressure container 70 or 70 'connected via the connecting line 71, also has a e.g. could in the piston chamber block 30 integrated internal pressure vessel, which communicates with the piston chamber 34 in communicating connection. Even with such an integrated pressure vessel, the active filling volume can be made adjustable. In addition, to compensate for pressure medium losses from the liquid chamber still a pressure medium supply can be provided in the liquid chamber. The pressure medium supply should be advantageously carried out via a check valve to the low pressure circuit, which is used to fill the system, to be able to separate from the high pressure circuit, which forms during forming. Finally, a supporting arrangement for the second female part 20 forming components 34, 35, 39, 41,42, 70, 70 ', 71, M of the closing device instead of stationary as in the embodiments shown in the figures, are also arranged to be movable so that the whole complex is movable toward the first female part 10. claims
    Closing device, preferably for extruding a workpiece (W), comprising a die (10, 20) comprising a first die part (10) and a second die part (20), wherein the first die part (10) and the second die part (20) for closing the die along a movement axis (A) relative to each other and for opening the die along the movement axis (A) are relatively movable away from each other, and wherein the second female part (20) in the direction of the movement axis (A) against the supporting force of a resilient Supporting arrangement (34,35,39,41,42,70,70 ', 71, M) is slidably disposed from an initial position to an end position, characterized in that the support arrangement for the second female part (20) is a closed and complete with a elastically compressible liquid pressure medium (M) filled liquid chamber (34, 39, 71, 70, 70 '), wherein the pressure medium (M) the second female part (20) is supported and wherein a on the one hand the printing medium (M) is compressible by displacement of the second female part (20) from its initial position to its end position and on the other hand, the second female part (20) by expansion of the printing medium (M) from its end position to its initial position is displaced back.
    [2]
    2. Closing device according to claim 1, characterized in that the support arrangement (34, 35, 39, 41, 42, 70, 70 ', 71, M) arranged in a one with the liquid pressure medium (M) piston chamber (34) slidably Supporting piston (35) which supports the second female part (20).
    [3]
    3. Closing device according to claim 2, characterized in that the second female part (20) indirectly via at least one support member (41,42) on the support piston (35) is supported.
    [4]
    4. Closing device according to claim 2 or 3, characterized in that the piston chamber (34) as an outer boundary wall (32) and an inner boundary wall (33) having annular chamber is formed and that the support piston (35) is designed as an annular piston.
    [5]
    5. Closing device according to claim 4, characterized in that the support piston (35) by means of sealing elements (36,37) relative to the outer and the inner boundary wall (32, 33) of the piston chamber (34) is sealed.
    [6]
    6. Closing device according to claim 4, characterized in that the support piston (35) by means of annular gap seals (81,82) relative to the outer and the inner boundary wall (32, 33) of the piston chamber (34) is sealed.
    [7]
    7. Closing device according to one of claims 2 to 6, characterized in that the piston chamber (34) has a communicating with a pressure vessel (70; 70 ') stationary interior part, said interior part of the piston chamber (34) and the pressure vessel (70 ; 70 ') including all connection lines (71, 39) are completely filled with the pressure medium (M).
    [8]
    8. Closing device according to claim 7, characterized in that the pressure vessel (70 ') has means (72, 73, 74) for adjusting the volume of the pressure vessel.
    [9]
    9. Closing device according to one of claims 1 to 8, characterized in that it comprises a first along the movement axis (A) movable pressing ram (11) and that the first female part (10) on the first ram (11) is formed or fixed.
    [10]
    10. Closing device according to claim 9, characterized in that it has a relative to the first ram (11) along the movement axis (A) adjustable holding member (14) for holding a workpiece (W).
    [11]
    11. Closing device according to one of claims 4 to 10, characterized in that it has a second along the movement axis (A) movable pressing ram (51) and that the second ram (51) in one of the inner boundary wall (33) of the piston chamber ( 34) enclosed space is slidably mounted relative to the second die part (20).
    [12]
    12. Closing device according to claim 11, characterized in that the second die part (20) encloses a section (52) of the second press ram (51) in an annular manner.
    [13]
    13. Closing device according to claim 12, characterized in that it comprises an ejection member (60) for moving the second press ram (51) along the axis of movement (A) and thereby causing expulsion of a workpiece (W) from the second female part (20).
    [14]
    14. Closing device according to one of claims 1 to 13, characterized in that the pressure medium (M) is water or hydraulic oil.
    类似技术:
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    同族专利:
    公开号 | 公开日
    WO2017216089A1|2017-12-21|
    CH712553B1|2020-02-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS6030545A|1983-07-28|1985-02-16|Sumitomo Heavy Ind Ltd|Closed forging device|
    US20010037669A1|1998-05-06|2001-11-08|Kunihiko Tanaka|Die system for full enclosed die forging|
    DE10047467A1|2000-09-21|2002-04-18|Schuler Pressen Gmbh & Co|Device and method for forming, in particular with a hydraulic closing device|
    CN103331399A|2013-02-25|2013-10-02|袁正敏|Double-acting annular cylinder counter-extrusion machine|
    US20150283599A1|2014-04-07|2015-10-08|Musashi Seimitsu Industry Co., Ltd.|Sizing method and sizing apparatus|
    DE102014224724A1|2014-12-03|2016-06-09|Robert Bosch Gmbh|high pressure pump|
    DE102014208776B3|2014-05-09|2015-11-05|Sms Meer Gmbh|Apparatus for forming forgings and associated press forging|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CH00759/16A|CH712553B1|2016-06-14|2016-06-14|Closing device, preferably for cross-extruding a workpiece.|CH00759/16A| CH712553B1|2016-06-14|2016-06-14|Closing device, preferably for cross-extruding a workpiece.|
    PCT/EP2017/064253| WO2017216089A1|2016-06-14|2017-06-12|Closing device|
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