• 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:
    The present disclosure provides an ultrasonic rolling device and method, relating to the field of metal processing, the ultrasonic rolling device includes a rotating gripper and a rolling mechanism, the rolling mechanism includes a supporting mechanism, a drive and an actuator, the drive mechanism and the actuator all being installed on the support mechanism, the actuator comprising a horn and a rolling head installed on the horn, the working end of the rolling head protruding from the outer circumferential surface of the horn, the drive mechanism causing the working end of the rolling head to vibrate through the horn, and the supporting mechanism causing the actuator to move axially so back and forth along the rotary gripper, which changes the positioning relationship between the rolling head and the horn of ultrasonic rolling devices s traditional, so as to perform ultrasonic rolling of inner hole of the workpiece whose size is larger than the radial size of the rolling head, determines the initial static pressure with a dynamometer, applies an initial static pressure with higher precision on the inner hole of the workpiece via the rolling head and monitors the pressure during rolling.
    公开号:BE1027610B1
    申请号:E20215109
    申请日:2021-02-17
    公开日:2022-02-16
    发明作者:Anhai Li
    申请人:Univ Shandong；
    IPC主号:
    专利说明:

    Ultrasonic rolling device and method
    TECHNICAL FIELD This disclosure relates to the field of metal processing, and in particular to an ultrasonic rolling device and method.
    TECHNICAL BACKGROUND The description in this section provides only the technical background relating to this disclosure and does not necessarily constitute prior art.
    Surface rolling technology is an important way to improve the quality of metal surface treatment and extend the service life of parts. With the introduction of ultrasonic technology, ultrasonic rolling technology has significant advantages over traditional metal surface rolling technology. By selecting reasonable ultrasonic surface rolling parameters, treated metal parts exhibit a dramatically improved surface finish and some metallic materials exhibit a mirror effect. In the metal material structure after ultrasonic rolling, a layer of grain refinement may occur gradually increasing from the metal surface to the inside. If the rolling parameters are reasonable, a nanocrystalline or sub-nanocrystalline layer may occur on the surface of some metals while generating residual compressive stress inside the metallic materials. The existence of the nanocrystalline or sub-nanocrystalline layer can improve the wear resistance and corrosion resistance of the metal parts, and the existence of the residual compressive stress can improve the fatigue resistance of the parts; Ultrasonic rolling therapy is a method of treatment by combining ultrasonically generated high-frequency impact force and static pressure applied at the start of rolling.
    The inventor has found that for existing ultrasonic rolling equipment,
    the center axes of the transducer, the horn and the rolling head lie on a BE2021/5109 same line, which makes it possible to carry out processing on outer circular surfaces, however for rolling an inner hole of a workpiece, the diameter of the workpiece must be greater than the total length of the rolling equipment and the length of the gripper of the equipment, thus limiting the size of the inner hole of the workpiece to be rolled and making it difficult for the processing of nearly circular inner hole of small ellipticity; in addition, in the traditional ultrasonic rolling, there are generally two modes to determine the value of the initial static pressure, one is to know the corresponding relationship between the material penetration amount and the pressure value in advance and then indirectly determine the level of the static pressure to be applied based on the displacement of the coordinates of the machine tool during the actual processing, which has a significant deviation between the applied static pressure and the actual ideal static pressure due to inconsistency the diameter of the rolling head and the diameter of the head used in the actual test and a deformation of the rolling rod during the application of the static pressure; the other is to add a hydraulic system to the tail of the rolling rod and determine the value of the static pressure to be applied by pressurizing the hydraulic system, which increases the complexity of the rolling device and disadvantages the maintenance and the maintenance of the rolling equipment, more importantly, increases the axial length of the rolling equipment, and therefore cannot realize the small-sized inner hole rolling.
    DESCRIPTION OF THE INVENTION To ameliorate the defects in the prior art, the present disclosure aims to provide a device and a method for ultrasonic rolling, modifying the positioning relationship between the rolling head and the horn of rolling devices. ultrasonic rolling, so as to perform ultrasonic rolling of inner hole of workpiece whose size is larger than radial size of rolling head, determining initial static pressure with dynamometer, applying initial static pressure accurately more high on the inner hole of the workpiece via the rolling head, realizing pressure monitoring during rolling,
    realizing adaptive rolling on the inner hole of small ellipticity by combining the BE2021/5109 deformation of the horn when applying static pressure, expanding the applicable scope of the rolling device and saving the basic cost.
    The first object of the present disclosure is to provide an ultrasonic rolling device, which adopts a following technical solution: which includes a rotating gripper and a rolling mechanism, the rolling mechanism including a supporting mechanism, a driving mechanism and an actuator, the drive mechanism and the actuator all being installed on the support mechanism, the actuator comprising a horn and a rolling head installed on the horn, the working end of the rolling head protruding from the outer circumferential surface of the horn, the drive mechanism causing the working end of the rolling head to vibrate through the horn, and the support mechanism causing the actuator to move axially so as to back and forth along the rotating gripper to perform ultrasonic rolling on a rotating part on the rotating device.
    Preferably, the rolling head is arranged at the end of the horn remote from the drive mechanism.
    In addition, the axis of the rolling head and the axis of the rotary gripper are coplanar, and the horn is used to enter the inner hole of the rotating workpiece to perform ultrasonic rolling on the wall of the inner hole of the room.
    In addition, the support mechanism includes a seat and a dynamometer, the seat cooperating with the outer structure to drive the drive mechanism and the actuator to move, adjusting the position relative to the rotating gripper allows the pressure to be changed static applied radially along the inner hole by the rolling head on the wall of the inner hole of the workpiece, and the dynamometer is used to measure the static pressure value applied by the rolling head on the workpiece.
    Further, the driving mechanism includes a transducer, and the transducer is provided therein with a first piezoelectric ceramic and a second piezoelectric ceramic, the first piezoelectric ceramic driving the horn to vibrate axially through the transducer under the action of the electric field and the second piezoelectric ceramic BE2021/5109 causing the horn to vibrate off the axis via the transducer under the action of the electric field; the first piezoelectric ceramic moves linearly back and forth in the axial direction, and the second piezoelectric ceramic comprises two groups which are arranged on either side of the axis of the horn and are telescopic alternately, so that the horn can swing up and down, two-dimensional linear back and forth and up and down swing are superimposed, so that the ultrasonic rolling head produces an oval motion trajectory.
    In addition, the horn is provided on the outside in a sheathing manner with a support ring.
    In addition, the axis of the rolling head and the axis of the horn are arranged at an angle, one end of the rolling head is connected with the horn, and the other end is used as the working end, the vertical distance between the working end of the rolling head and the axis of the horn being greater than the radius of the horn, so that the horn cannot come into contact with the part.
    The second object of the present disclosure is to provide an ultrasonic rolling method, which comprises the following steps: attaching a workpiece to be rolled on the rotating gripper, and arranging the inner hole coaxially with the rotating gripper; adjusting the position of the rolling mechanism to bring the rolling head into contact with the wall of the inner hole and adjusting the static pressure applied by the rolling head to the wall of the inner hole; start the driving mechanism, so that the driving mechanism drives the rolling head to perform ultrasonic rolling on the wall of the inner hole: the support mechanism drives the actuator to advance axially along the inner hole to expand the ultrasonic rolling range and gradually cover the inner hole wall.
    In addition, before rolling and after pre-processing on the inner hole of the workpiece, the workpiece remains in the original clamping state for subsequent rolling processing.
    BE2021/5109 In addition, the adjustment of the position of the rolling mechanism includes the following steps in particular: first calibrate the axis of the horn until parallel to the axis of the inner hole; then adjust parallel and radially the position of the actuator along the inner hole; until the rolling head just touches the wall of the inner hole.
    In addition, the driving mechanism and the support mechanism simultaneously drive the rolling head to work, so that the rolling head advances while rolling.
    Compared with existing techniques, the present disclosure has the following advantages and beneficial effects: (1) by modifying the positioning relationship between the rolling head and the horn of traditional ultrasonic rolling devices, the rolling head is located at the lateral side of the horn end, thereby realizing ultrasonic rolling on all metal inner holes whose size is larger than the radial size of the rolling head, greatly improving the hole diameter range of workpieces for the ultrasonic rolling, satisfying the requirements of ultrasonic rolling to the most force-bearing holes, improving the surface finish of the hole, also improving the fatigue resistance of the hole, and thus extending the service life of the parts; (2) The support mechanism drives the actuator to move, the rolling head gradually applies pressure to the wall of the inner hole, and the dynamometer measures the initial static pressure, which can quickly and accurately determine the static pressure during rolling, promotes real-time control of pressure value during ultrasonic rolling, and indirectly monitors the process of ultrasonic rolling, and effectively controls the surface quality of ultrasonic rolling; (3) a transducer composed of a combination of piezoelectric ceramics is used to realize rolling head movement in multi-directions and axial and vertical vibrations, which cooperate so that the rolling head produces an oval movement path ; The oval motion path enables BE2021/5109 to effectively reduce the processing resistance of the workpiece to the rolling head during ultrasonic rolling, reduce the wear of the rolling head, and extend the life of the head rolling; (4) static pressure being applied to the workpiece by the deformation of the horn, the deformation of the horn will be greater than the difference between the long axis and the short axis of the inner hole for a small ellipticity inner hole structure, of so that the amount of deformation can be used to compensate for the processing margin corresponding to the long axis, thereby realizing the oval inner hole rolling and improving the applicability of the device; (5) ultrasonic rolling on the surface of the workpiece can significantly improve the surface finish, in the metal material structure after ultrasonic rolling, a layer of grain refinement can occur gradually increasing from the metal surface inside after ultrasonic rolling, and nanocrystalline or sub-nanocrystalline layer may occur while generating residual compressive stress inside the metallic material; the existence of the nanocrystalline or sub-nanocrystalline layer can improve the wear resistance and the corrosion resistance of the metal parts, and the existence of residual compressive stress can improve the fatigue strength of the parts; (6) It solves the problem of difficulty of rolling on the inner holes by the traditional ultrasonic rolling devices, on the one hand to enter the inner hole by combining the horn and the rolling head to realize a rolling on the inner holes, on the other hand to perform rolling on the outer circumferential surface of the part to improve the applicability of the device and reduce the production cost.
    DESCRIPTION OF FIGURES This disclosure will be better understood by reference to the accompanying figures which construct part of the description of this disclosure, and the illustrative embodiments of this disclosure and its descriptions are only to explain this disclosure, rather than to limit this disclosure. BE2021/5109 Figure 1 is a view of the overall structure of a rolling device of Examples 1 and 2 of the present disclosure; Figure 2 is a view of the cooperation structure of the drive mechanism and the actuator of Examples 1 and 2 of the present disclosure; Figure 3 is an arrangement view of the piezoelectric ceramic within the transducer of Examples 1 and 2 of the present disclosure; Figure 4 is a view of the structure of the ultrasonic generator of Examples 1 and 2 of the present disclosure; Figure 5 is a view of the structure of the signal amplifier of the dynamometer of examples 1 and 2 of the present disclosure; FIG. 6 is a view of the surface roughness of the part before and after rolling of examples 1 and 2 of the present disclosure; Figure 7 is a view of the oval inner hole shape of Example 3 of this disclosure, where, 1. Machine tool shim; 2. Dynamometer measuring head; 3. Dynamometer signal amplifier; 4. Rolling Rod Clamp; 5. Ultrasonic rolling rod; 51. Transducer; 511. Housing; 512. Large diameter piezoelectric ceramic sheet; 513. Small diameter piezoelectric ceramic sheet; 514. Vent; 52. Cornet; 521. Iron O-ring; 53. Rolling head; 6. Ultrasonic generator.
    DETAILED DESCRIPTION OF EMBODIMENT It should be noted that the detailed description below is only illustrative to better understand this disclosure. It should be noted that, unless otherwise indicated, all technical and scientific terms used in this disclosure have the same meaning as those well known to those skilled in the art. It should be noted that the terms used herein are intended to describe embodiments, rather than limit the illustrative embodiment according to the present disclosure. Unless otherwise indicated, the singular form includes the plural, in addition, the words used herein "understand" and/or "include", indicate the presence of the characteristic, step, work, device, component and/or the BE2021/5109 combination of these. It should be understood that terms such as "upper", "lower", "left" and "right" correspond to the meanings of "upper", "lower", "left" and "right" shown in the figures, they do not are only to facilitate the description of the present invention and for simple description, instead of indicating or implying the positions of the devices or elements and the installations and operations in the directions specified, and therefore cannot be understood as limitations of this disclosure.
    As introduced in the prior art, it is difficult to process the inner hole of the workpiece with the ultrasonic rolling equipments in the prior art, and the error of applying the static pressure is large, causing the ultrasonic rolling cannot meet the demands, to solve the above problems, the present disclosure provides an ultrasonic rolling device and method.
    Example 1 In one embodiment of the present disclosure, as shown in Figures 1-6, an ultrasonic rolling device is provided.
    It comprises a rotating gripper and a rolling mechanism, the rolling mechanism comprising a support mechanism, a drive mechanism and an actuator the support mechanism comprises a seat and a dynamometer, in the present embodiment, the device for ultrasonic rolling cooperates with an existing machine tool, the seat is a machine tool wedge 1, the upper part of the machine tool wedge is connected with a dynamometer measuring head 2, and the dynamometer measuring head is connected to a dynamometer signal amplifier 3; it can of course be understood that the machine tool wedge cooperates with an external structure to cause the drive mechanism and the actuator to move, the adjustment of the position relative to the rotary gripper makes it possible to change the — pressure static applied radially along the inner hole by the rolling head on the inner hole wall of the workpiece, and the dynamometer is used to measure the BE2021/5109 static pressure value applied by the rolling head on the workpiece. As shown in Fig. 1, a rolling rod clamp 4 is connected above the dynamometer, the driving mechanism and the actuator together form an ultrasonic rolling rod 5, and the ultrasonic rolling rod is installed on the dynamometer via the rolling rod clamp; the ultrasonic rolling rod is composed of the transducer 51, the horn 52 and the rolling head 53, the transducer being connected to one end of the horn, and the end of the horn remote from the transducer is provided with a rolling head ; the working end of the rolling head protrudes from the outer circumferential surface of the horn, the drive mechanism drives the working end of the rolling head to vibrate through the horn, and the support mechanism causes the actuator to move axially along the rotary gripper to enter the inner hole of the rotary workpiece on the gripper and thereby perform ultrasonic rolling on the wall of the inner hole of the workpiece.
    By changing the positioning relationship between the rolling head and the horn of traditional ultrasonic rolling devices, the rolling head is located at the lateral side of the end of the horn, thus realizing ultrasonic rolling on all holes metal inners whose size is larger than the radial size of the rolling head, greatly improving the hole diameter range of workpieces for ultrasonic rolling, satisfying the requirements of ultrasonic rolling at the most force-bearing holes, improving the surface finish of the hole, also improving the fatigue resistance of the hole and thus extending the service life of the parts.
    In particular, the axis of the rolling head and the axis of the horn are arranged at an angle, one end of the rolling head is connected with the horn, and the other end is used as the working end, the vertical distance between the working end of the rolling head and the axis of the horn being greater than the radius of the horn, so that the horn cannot come into contact with the part.
    In the present embodiment, the end of the horn away from the transducer is provided with a slope forming an angle of 45 degrees with its end face, and the 45 degree slope of the horn is BE2021/5109 movably connected at the rolling head; it can of course be understood that other angles are possible, such as 30 degrees or 60 degrees, provided that the working end of the rolling head can protrude from the outer circumferential surface of the horn to avoid any interference between the horn and the inner hole. The axis of the rolling head and the axis of the rotary gripper are coplanar; preferably, the axis of the rolling head is in a horizontal or vertical plane, which facilitates the adjustment of the position of the rolling head and the measurement of the static pressure value.
    The transducer 51 is composed of a housing 511 and piezoelectric ceramic sheets, three groups of piezoelectric ceramic sheets of two diameters are arranged inside the housing, ie the first piezoelectric ceramic and the second piezoelectric ceramic; the first piezoelectric ceramic is the large-diameter piezoelectric ceramic sheet 512, which is arranged at one end of the transducer near the horn, and the second piezoelectric ceramic is the small-diameter piezoelectric ceramic sheet 513, which comprises two groups arranged on either side and on the other side of the axis of the transducer, the diameter of the small-diameter piezoelectric ceramic sheet being equal to half the diameter of the large-diameter piezoelectric ceramic; the small diameter piezoelectric ceramic sheet is disposed inside the transducer at an end remote from the horn; the large-diameter piezoelectric ceramic sheet is deformed under the action of an electric field and thus moves back and forth in the axial direction, and two groups of small-diameter piezoelectric ceramic sheets are telescopic alternately, so that the horn can oscillate back and forth off-axis, therefore, these two two-dimensional motions, namely the back-and-forth motion along the axis and the back-and-forth motion off the axis overlap, so that the ultrasonic rolling head produces an oval motion path;
    Since a "deduct peaks and fill valleys" effect BE2021/5109 naturally occurs during ultrasonic rolling, the oval motion path helps reduce the workpiece processing resistance to the rolling head during rolling. ultrasonic rolling, reduce the wear of the rolling head and extend the life of the rolling head; a transducer composed of a combination of piezoelectric ceramics is used to realize rolling head movement in multi-directions and axial and vertical vibrations, which cooperate so that the rolling head produces an oval movement path; The oval motion path can effectively reduce the processing resistance of the workpiece to the rolling head during ultrasonic rolling, reduce the wear of the rolling head, and prolong the service life of the rolling head.
    It should be noted that, in the present embodiment, a vent 514 is arranged at the lateral side of the rear part of the housing; Since the piezoelectric ceramic sheets are not only telescopic in the axial direction during the working process, but also convert part of the electric energy into the thermal energy, working for a long time will cause the temperature to be too high of the piezoelectric ceramic, when the temperature is higher than the Curiec temperature of the piezoelectric ceramic, the piezoelectric effect of the piezoelectric ceramic will disappear. Therefore, the arrangement of the vent to blow compressed air inside is favorable for the heat radiation of the piezoelectric ceramic during working, so that the piezoelectric ceramic can maintain a stable oscillation amplitude during the work process, thus improving the uniformity of rolling treatment; it is of course understandable that the vent can be connected to an outside air source via ducts, so that low temperature air can enter the interior of the housing.
    The machine tool shim has a longitudinal section in the shape of "1", and the position of the bolt hole on the machine tool shim corresponds to the position of the bolt hole of the tool holder of the machine tool; BE2021 /5109 the wedge can be customized here according to the dimensions of the tool holder of the machine tool, so it is possible to use only one to perform ultrasonic rolling on a machine tool without the need to purchase equipment additional ultrasonic rolling.
    This modification has a wide range of applications and can therefore significantly reduce equipment costs.
    The horn is provided on the outside in a sheathing manner with a support ring structure, in the present embodiment the support ring is an iron O-ring 521, on which the rod fixing screw presses rolling to prevent damage to the rolling rod; stable vibration transmission can be guaranteed during work.
    The working end of the rolling head 53 is a tip, in the present embodiment, the working end is fixedly provided with a synthetic diamond in spherical shape and having a diameter of 1 to 3 mm, the diamond having the characteristics of high hardness and high wear resistance, which can satisfy the processing requirements for most metal materials; of course, the rolling head can also be made of other materials as required.
    Example 2 In another exemplary embodiment, as shown in Figs. 1 to 6, an ultrasonic rolling method is proposed, which uses the ultrasonic rolling device according to the exemplary embodiment 1. The method comprises the following steps: attaching a piece to be rolled on the rotating clamp, and arranging the inner hole coaxially with the rotating clamp; before ultrasonic rolling, process the surface of the inner hole until the roughness is less than Ra6.4, then disassemble the tool holder from the machine tool holding the workpiece, and install the rolling mechanism to the original position the tool holder of the — machine tool;
    adjust the position of the rolling mechanism, first align the central axis of the rod of BE2021/5109 rolling and the centerline of the inner hole at the same level and parallel to each other, then move the head of rolling with the flywheel of the machine tool to just touch the edge of the inside hole of the part;
    start the dynamometer to measure the force, and at the same time move the rolling head to load the workpiece surface with static pressure, and read the loaded static pressure on the dynamometer, the range of the static pressure is 50-300N , until the static pressure reaches the preset value; start the drive mechanism, and connect the ultrasonic generator 6 to the drive mechanism, so that the drive mechanism drives the rolling head to perform ultrasonic rolling on the inner hole wall; the support mechanism drives the actuator to advance axially along the inner hole to expand the ultrasonic rolling range and gradually cover the inner hole wall.
    The surface roughness of the workpiece before and after rolling is shown in Figure 6. It should be noted that during the feed process, the feed rate of the rolling head is 10 m/min to 80 m/ min and the transmission frequency of the ultrasonic generator is 35 kHz to 40 kHz; during rolling, the feed is unidirectional, that is, the feed is axial along the inner hole, after the rolling area gradually covers the wall of the inner hole, adjust the position of the head of rolling, so that the rolling head, the horn and the wall of the inner hole do not come into contact, and remove the rolling head from the inner hole.
    During the static pressure loading process, the part should remain in a static state, and the initial static pressure loading point should be as close as possible to the edge of the inner hole.
    Since partial vacuum at the inner hole position may occur during the process of loading a load at the static pressure loading point, a margin of 1mm to 5mm should be reserved at the inner hole position in the length direction before ultrasonic rolling on the workpiece, so as to eliminate the static pressure overload point after ultrasonic rolling.
    BE2021/5109 Of course, it is understood that, to treat an outer circumferential surface with the ultrasonic rolling device in embodiment 1, it suffices to operate according to the existing outer circumferential surface treatment method, which will not be not described here; this solves the problem of difficulty of rolling on the inner holes by the traditional ultrasonic rolling devices, on the one hand allowing to penetrate the inner hole by combining the horn and the rolling head to realize rolling on the inner holes, on the other hand to carry out rolling on the outer circumferential surface of the workpiece to improve the applicability of the device and reduce the production cost.
    The support mechanism drives the actuator to move, the rolling head gradually applies pressure to the wall of the inner hole, and the dynamometer measures the initial static pressure, allowing the static pressure to be quickly and accurately determined during rolling , promote real-time control of pressure value during ultrasonic rolling and indirectly monitor ultrasonic rolling process and effectively control surface quality of ultrasonic rolling.
    Example 3 In another exemplary embodiment of the present application, as shown in Figures 1 to 7, an ultrasonic rolling process is proposed.
    The difference from embodiment 2 is that, for the processing of the inner hole of the workpiece according to the present embodiment, the rolling of the oval inner hole is carried out via the deformation which occurs during applying static pressure to the horn, comprising the following steps: attaching a piece to be rolled to the rotating clamp, and arranging the inner hole keeping its center coaxial with the rotating clamp; adjust the position of the rolling mechanism, first align the centerline of the rolling rod and the centerline of the oval inner hole at the same height and parallel to each other, then move the rolling head with the handwheel of the machine tool to just touch the edge of the inside hole of the part; BE2021/5109 start the dynamometer to measure the force, and at the same time move the rolling head to load the workpiece surface with static pressure, so that the horn produces off-axis deformation, and read the loaded static pressure on the dynamometer, the range of the static pressure is 50 to 300 N, until the static pressure reaches the preset value; start the drive mechanism, and connect the ultrasonic generator 6 to the drive mechanism, so that the drive mechanism drives the rolling head to perform ultrasonic rolling on the inner hole wall; to process the corresponding part of the long axis, the offset angle of the horn axis decreases and approaches the position of the axis, thus completing the margin of the long axis part and reaching the purpose of oval hole treatment; the support mechanism drives the actuator to advance axially along the inner hole to expand the ultrasonic rolling range and gradually cover the inner hole wall.
    Since static pressure is applied to the workpiece by the deformation of the horn, the deformation of the horn will be greater than the difference between the long axis and the short axis of the inner hole for a small ellipticity inner hole structure, so that the amount of deformation can be used to compensate for the processing margin corresponding to the long axis, thereby realizing the oval inner hole rolling and improving the applicability of the device.
    While changing the deformation of the horn, it also changes the static pressure applied to the wall of the inner hole, therefore, in order to ensure the rolling effect, it is necessary to control the difference between the long axis and the short axis of the oval hole to avoid too large a difference, that is, the oval hole tends to close to a circle; in the present embodiment, the ellipticity r <0.06mm.
    The examples of embodiment below are given only by way of example of preference, rather than limiting the present disclosure, and the modifications and variations on the present disclosure by those skilled in the art are of course possible.
    Any modifications, equivalent replacements, and improvements that comply with the BE2021/5109 spirits and principles of this disclosure shall be included as part of the protection of this disclosure.
    权利要求:
    Claims (10)
    [1]
    1. Ultrasonic rolling device, characterized in that it comprises a rotating gripper and a rolling mechanism, the rolling mechanism comprising a support mechanism, a drive mechanism and an actuator, the drive mechanism and the the actuator being all installed on the supporting mechanism, the actuator comprising a horn and a rolling head installed on the horn, the working end of the rolling head protruding from the outer circumferential surface of the horn, the mechanism for drive causing the working end of the rolling head to vibrate through the horn, and the supporting mechanism causing the actuator to move axially back and forth along the rotating gripper to execute ultrasonic rolling on a rotary part on the rotary device.
    [2]
    2. Ultrasonic rolling device according to claim 1, characterized in that the axis of the rolling head and the axis of the rotary gripper are coplanar, and the horn is used to penetrate into the inner hole of the part rotary to perform ultrasonic rolling on the inner hole wall of the workpiece.
    [3]
    3. Ultrasonic rolling device according to claim 1, characterized in that the support mechanism comprises a seat and a dynamometer, the seat cooperating with the external structure to drive the drive mechanism and the actuator to move, adjusting the position with respect to the rotating gripper can change the static pressure applied radially along the workpiece by the rolling head on the workpiece, and the dynamometer is used to measure the value of static pressure applied by the rolling head on the workpiece. the room.
    [4]
    4. Ultrasonic rolling device according to claim 1, characterized in that the horn is provided on the outside in a sheathing manner with a support ring.
    [5]
    5. Ultrasonic rolling device according to claim 4, characterized in that the axis of the rolling head and the axis of the horn are arranged at an angle, one end of the rolling head is connected to the horn and the other end is used as the working end, the vertical distance between the working end of the rolling head and the axis of the horn is greater than the radius of the horn, so that the horn cannot come into contact with the room.
    [6]
    6. Ultrasonic rolling device according to claim 1, characterized in that, the driving mechanism comprises a transducer and the transducer is provided inside with a first piezoelectric ceramic and a second piezoelectric ceramic, the first piezoelectric ceramic causing the horn to vibrate axially via the transducer under the action of the electric field and the second piezoelectric ceramic causing the horn to vibrate off-axis via the transducer under the action of the electric field.
    [7]
    7. Ultrasonic rolling process, characterized in that it uses the ultrasonic rolling device according to any one of claims 1 to 6, comprising the following steps: attaching a piece to be rolled to the rotating gripper, and placing the inner hole coaxially with the rotary clamp; adjusting the position of the rolling mechanism to bring the rolling head into contact with the wall of the inner hole and adjusting the static pressure applied by the rolling head to the wall of the inner hole; start the driving mechanism, so that the driving mechanism drives the rolling head to perform ultrasonic rolling on the wall of the hole — inner: the support mechanism drives the actuator to advance axially along the inner hole to expand the ultrasonic rolling range and gradually cover the inner hole wall.
    [8]
    8. Ultrasonic rolling process according to claim 7, characterized in that, before rolling and after the pretreatment on the inner hole of the workpiece, the workpiece remains in the original clamped state for a subsequent rolling treatment. .
    [9]
    9. Ultrasonic rolling process according to claim 7, characterized in that the adjustment of the position of the rolling mechanism comprises in particular the following steps: - first calibrating the axis of the horn until it is parallel to the inner hole axis;
    then adjust parallel and radially the position of the actuator along the inner hole BE2021/5109; until the rolling head just touches the wall of the inner hole.
    [10]
    10. Ultrasonic rolling method according to claim 7, characterized in that the driving mechanism and the support mechanism simultaneously drive the rolling head to work, so that the rolling head advances while rolling.
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    同族专利:
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    CN202010222665.2A|CN111299959B|2020-03-26|2020-03-26|Ultrasonic rolling device and method|
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