clamps

Abstract

This application discloses a fixture, including a mounting body, a locking member, and a first elastic member. The mounting body includes a mounting groove, a storage compartment, and a channel, with the channel connecting the storage compartment and the mounting groove. The mounting groove is configured to accommodate a workpiece. The locking member is movably disposed in the storage compartment and the channel along the axial direction of the mounting body and is configured to detachably connect to the workpiece within the mounting groove. The first elastic member is disposed in the storage compartment and connected to the locking member. The first elastic member is configured to undergo elastic deformation to provide a clearance space for the locking member and the workpiece to move axially relative to the mounting body. When the workpiece heats up and expands, it expands outward. The first elastic member provides clearance space through its own elastic deformation, allowing the locking member and the workpiece to move axially relative to the mounting body. This enables the workpiece to move slightly outward from the mounting groove, releasing thermal stress and preventing irreversible plastic deformation or microscopic damage from compression, thus ensuring the shape accuracy and surface quality of the workpiece.

Description

Technical Field

[0001] This application belongs to the field of fixture technology, and specifically relates to a fixture. Background Technology

[0002] After the acetabular cup is clamped in the fixture, it can be turned to ensure the stability of the machining process under different cutting forces. During the cutting process, the acetabular cup will heat up and expand, causing it to bulge outward. However, the acetabular cup is usually rigidly clamped and fixed by the fixture. This can cause the acetabular cup to deform under the pressure of the fixture when it expands outward, resulting in poor quality of the machined acetabular cup. Utility Model Content

[0003] This application provides a fixture designed to improve the problem of workpieces deforming due to compression after being heated.

[0004] This application provides a fixture including a mounting body, a locking member, and a first elastic member. The mounting body includes a mounting slot, a storage compartment, and a channel, the channel connecting the storage compartment and the mounting slot. The mounting slot is configured to accommodate a workpiece. The locking member is movably disposed in the storage compartment and the channel along the axial direction of the mounting body and is configured to detachably connect to the workpiece in the mounting slot. The first elastic member is disposed in the storage compartment and connected to the locking member. When the workpiece expands, the locking member presses against the first elastic member, causing the first elastic member to undergo elastic deformation to provide allowance space for the locking member and the workpiece to move axially relative to the mounting body.

[0005] In the above-mentioned fixture, the workpiece is connected by a locking member to position the workpiece in the mounting groove. When the workpiece heats up and expands, the workpiece will expand outward. The first elastic member provides a concession space through its own elastic deformation so that the locking member and the workpiece can move axially relative to the mounting body, allowing the workpiece to move slightly out of the mounting groove to release the thermal stress of the workpiece and prevent the workpiece from being squeezed and causing irreversible plastic deformation or microscopic damage, so as to ensure the shape accuracy and surface quality of the workpiece.

[0006] In some embodiments, the fixture further includes a support member and a second elastic member; the support member is axially movably disposed on the mounting body and can pass through the inner wall of the mounting groove; the second elastic member is disposed in the storage compartment and connected to the support member so that the support member elastically contacts the workpiece.

[0007] The second elastic element rebounds when the workpiece heats up and expands, driving the support to move axially relative to the mounting body, so that the support and the workpiece maintain elastic contact, thereby providing flexible support force for the workpiece and absorbing the processing vibration of the workpiece, so that the workpiece remains stable during processing.

[0008] In some embodiments, the support has a contoured surface facing the inner wall of the mounting groove, the contoured surface being configured to engage with the inner wall of the mounting groove and adapt to the outer surface of the workpiece.

[0009] The aforementioned contoured surface is connected to the inner wall of the mounting groove so that the shape of the contoured surface matches the outer surface of the workpiece, increasing the contact area between the contoured surface and the outer surface of the workpiece. This allows the support force of the support component to be evenly distributed on the workpiece through the contoured surface, thus better absorbing the processing vibration of the workpiece and ensuring the stability and accuracy of the workpiece during the processing.

[0010] In some embodiments, the inner wall and the contoured surface of the mounting groove are both arc surfaces.

[0011] The arc surface facilitates the smooth connection and transition between the inner wall of the mounting groove and the contoured surface. When the workpiece is installed into the mounting groove, the inner wall and contoured surface of the mounting groove can fit the workpiece with its hemispherical outer surface and jointly support the outer surface of the workpiece.

[0012] In some embodiments, the locking member includes a stop and an extension. The stop is axially movably disposed within a storage compartment, and the extension extends from the stop toward a channel and is configured to connect a workpiece. The storage compartment has opposing first and second sidewalls, and the channel passes through the second sidewall. The first elastic member includes a first spring and a second spring. The first spring abuts against the first sidewall and the stop, and the second spring is sleeved on the extension and abuts against the second sidewall and the stop.

[0013] The first spring abuts against the stop, causing at least a portion of the extension to protrude from the channel and enter the mounting groove, facilitating at least a partial connection between the workpiece and the extension. The second spring provides clearance for axial movement of the stop when the workpiece expands due to heat. The second spring adapts to the movement of the stop, providing axial tension to the locking element, enabling it to apply a continuous and adaptively adjustable axial locking force to the workpiece. This dynamically compensates for the workpiece's thermal expansion, preventing workpiece damage or locking failure due to thermal stress in rigid connections, and ensuring the rigidity and accuracy of workpiece positioning during machining.

[0014] In some embodiments, the surface of the extension is provided with threads; the end of the extension away from the stop is provided with an operating port, which is configured to connect an operating tool to drive the extension to rotate, so that the extension is threadedly connected to the workpiece.

[0015] The aforementioned operating port is configured to connect the operating tool, so that the operating tool drives the extension to rotate relative to the workpiece until the extension is threadedly connected to the workpiece. The workpiece remains stationary while the extension rotates, which helps to protect the shape of the workpiece and prevent the workpiece from rotating and wearing.

[0016] In some embodiments, the mounting body is provided with a guide hole that extends axially and connects the storage compartment and the mounting groove; the support member is connected with a connecting rod that passes through the guide hole and is configured to connect a second elastic member.

[0017] The second elastic element and the support element are connected by a connecting rod to transmit the elastic force of the second elastic element to the support element, so that the support element can flexibly support the workpiece under the drive of the second elastic element; the inner wall of the guide hole can guide the connecting rod to move axially, so that the support element can move smoothly along the axial direction under the action of the second elastic element.

[0018] In some embodiments, the support member is connected to a plurality of links, which are distributed circumferentially along the mounting body. The ends of the links away from the support member are connected to an abutment ring, which is located in the storage compartment and configured to abut against a second elastic member.

[0019] The abutment ring abuts against the second elastic element to transmit the elastic force of the second elastic element to the support element; multiple connecting rods connect the abutment ring and the support element, enabling the second elastic element to apply balanced and stable flexible support to the support element, preventing uneven force distribution or tilting of the support element, and ensuring that the support force of the support element on the workpiece is evenly distributed, thereby improving the shock absorption effect on the workpiece.

[0020] In some embodiments, there are two support members and two second elastic members; the two support members are distributed circumferentially on the outside of the locking member, and each second elastic member corresponds to and is connected to one support member so that each support member elastically contacts the workpiece.

[0021] The increased contact area between two or more support members and the workpiece provides more stable support and improves the shock absorption effect on the workpiece. It also reduces the support strength of a single support member and the second elastic member, which helps to disperse stress and ensure the stability and reliability of the structure.

[0022] In some embodiments, the inner wall of the mounting body is threadedly connected to a first cover, a first sidewall is disposed on the first cover, and the first cover is configured to adjust the length of the first elastic element.

[0023] When the first cover is threaded onto the inner wall of the mounting body, the first side wall abuts against the first elastic element. By rotating the first cover, the first cover can be moved axially relative to the mounting body to adjust the length of the first elastic element. Attached Figure Description

[0024] Figure 1 This is a perspective view of a workpiece held by a fixture in one embodiment of this application.

[0025] Figure 2 yes Figure 1 A three-dimensional schematic diagram of the disassembled fixture and workpiece.

[0026] Figure 3 yes Figure 2 A cross-sectional view of the fixture and workpiece along line III-III.

[0027] Figure 4 yes Figure 3 A three-dimensional schematic diagram of the main installation body after it has been cut open.

[0028] Figure 5 yes Figure 1 Exploded view of the fixture in three dimensions.

[0029] Explanation of main component symbols 100. Fixture; 10. Mounting body; 101. Storage compartment; 1011. First side wall; 1012. Second side wall; 102. Mounting groove; 103. Channel; 104. Embedded groove; 105. Guide hole; 11. First cover; 12. Second cover; 13. Partition wall; 20. Locking element; 21. Stop part; 22. Extension part; 2201. Operating port; 23. Thread; 30. First elastic element; 31. First spring; 32. Second spring; 40. Support element; 401. Contour surface; 41. Connecting rod; 411. Abutment ring; 50. Second elastic element; 200. Workpiece; 2001. Threaded hole; Z, Axial direction.

[0030] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0032] In the description of the embodiments of this application, the technical terms "first", "second", etc. are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0033] In the description of the embodiments of this application, the term "perpendicular" is used to describe the ideal state between two components. In actual production or use, two components may be in a state that is approximately perpendicular. The term "parallel" is used to describe the ideal state between two components. In actual production or use, two components may be in a state that is approximately parallel.

[0034] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0036] After the acetabular cup is clamped in the fixture, it can be turned to ensure the stability of the machining process under different cutting forces. During the cutting process, the acetabular cup will heat up and expand, causing it to bulge outward. However, the acetabular cup is usually rigidly clamped and fixed by the fixture. This can cause the acetabular cup to deform under the pressure of the fixture when it expands outward, resulting in poor quality of the machined acetabular cup.

[0037] An embodiment of this application provides a fixture including a mounting body, a locking member, and a first elastic member. The mounting body includes a mounting slot, a storage compartment, and a channel, the channel connecting the storage compartment and the mounting slot. The mounting slot is configured to accommodate a workpiece. The locking member is movably disposed in the storage compartment and the channel along the axial direction of the mounting body and is configured to detachably connect to the workpiece in the mounting slot. The first elastic member is disposed in the storage compartment and connected to the locking member. When the workpiece expands, the locking member presses against the first elastic member, causing the first elastic member to undergo elastic deformation to provide allowance space for the locking member and the workpiece to move axially relative to the mounting body.

[0038] In the above-mentioned fixture, the workpiece is connected by a locking member to position the workpiece in the mounting groove. When the workpiece heats up and expands, the workpiece will expand outward. The first elastic member provides a concession space so that the locking member and the workpiece can move axially relative to the mounting body, allowing the workpiece to move slightly outward from the mounting groove to release the thermal stress of the workpiece and prevent the workpiece from being squeezed and causing irreversible plastic deformation or microscopic damage, so as to ensure the shape accuracy and surface quality of the workpiece.

[0039] The embodiments of this application will be further described below with reference to the accompanying drawings. Unless otherwise specified, the various embodiments in this application can be combined with each other.

[0040] Please see Figure 1 and Figure 2 This application provides a fixture 100 for positioning a workpiece 200, so that a processing device can process the positioned workpiece 200. Exemplarily, the workpiece 200 is bowl-shaped (e.g., an acetabular cup), and the processing device is a cutting device used to cut the inner wall of the bowl-shaped workpiece 200.

[0041] Please combine Figure 3 and Figure 4The fixture 100 includes a mounting body 10, a locking member 20, and a first elastic member 30. The mounting body 10 includes a mounting groove 102, a storage compartment 101, and a channel 103. The channel 103 extends from the storage compartment 101 through the inner wall of the mounting groove 102 to connect the mounting groove 102 and the storage compartment 101. The mounting groove 102 is used to accommodate a workpiece 200 and is adapted to the shape of the workpiece 200. The locking member 20 is movably disposed in the storage compartment 101 and the channel 103 along the axial direction Z of the mounting body 10, and is used for detachably connecting the workpiece 200 in the mounting groove 102. The first elastic member 30 is disposed in the storage compartment 101 and connected to the locking member 20. When the workpiece 200 expands, the locking member 20 presses against the first elastic member 30, causing the first elastic member 30 to elastically deform to provide allowance space for the locking member 20 and the workpiece 200 to move relative to the mounting body 10 along the axial direction Z. For ease of description, the axial direction Z of the mounting body 10 will be referred to as axial direction Z. The storage compartment 101 and the channel 103 both extend along axial direction Z (see Figure 103). Figure 3 ).

[0042] Please see Figure 3 In some embodiments, the locking member 20 extends at least partially out of the channel 103 and connects to the workpiece 200 within the mounting groove 102 via at least a portion of the extension into the channel 103. In other embodiments, the workpiece 200 may also partially protrude into the channel 103 to connect to the locking member 20. Positioning the workpiece 200 within the mounting groove 102 by the locking member 20 prevents the workpiece 200 from moving radially or rotating circumferentially within the mounting groove 102. Here, radial refers to the radial direction of the mounting body 10, and circumferential refers to the circumferential direction of the mounting body 10.

[0043] When the workpiece 200 heats up and expands, it will expand outward. The first elastic element 30 provides a concession space through its own elastic deformation so that the locking element 20 and the workpiece 200 can move relative to the mounting body 10 along the axial direction Z. This allows the workpiece 200 to move slightly outward from the mounting groove 102 to release the thermal stress of the workpiece 200 and prevent the workpiece 200 from being squeezed and causing irreversible plastic deformation or microscopic damage, thereby ensuring the shape accuracy and surface quality of the workpiece 200 and improving the product yield.

[0044] In some embodiments, the channel 103 is located at the central axis of the mounting body 10 and connects to the center of the mounting groove 102 to position the center of the workpiece 200, resulting in good positioning effect.

[0045] Please combine Figure 3 and Figure 4 A first cover 11 is connected to the inner wall thread 23 of the mounting body 10. The first cover 11 is used to abut against the first elastic member 30. By rotating the first cover 11, the first cover 11 can be moved relative to the mounting body 10 along the axial direction Z to adjust the length of the first elastic member 30.

[0046] In some embodiments, the storage compartment 101 has opposing first sidewalls 1011 and second sidewalls 1012 in the axial Z direction. The first sidewall 1011 is located on the first cover 11, and the second sidewall 1012 is penetrated by the channel 103. The locking member 20 includes a stop portion 21 and an extension portion 22. The stop portion 21 is movably disposed within the storage compartment 101 in the axial Z direction, and the extension portion 22 extends from the stop portion 21 into the channel 103 to extend into the channel 103 to connect the workpiece 200. The first elastic member 30 includes a first spring 31 and a second spring 32. The first spring 31 abuts against the first sidewall 1011 and the stop portion 21, and the second spring 32 is sleeved on the extension portion 22 and abuts against the second sidewall 1012 and the stop portion 21.

[0047] Understandably, the first spring 31 abuts against the stop 21, causing the extension 22 to at least partially extend out of the channel 103 and enter the mounting groove 102, so as to facilitate at least partial connection between the workpiece 200 and the extension 22. When the workpiece 200 expands due to heat, causing the locking member 20 to move axially Z, the second spring 32 is compressed, thereby providing a clearance space for the stop 21 to move axially Z. At the same time, the rebound force generated by the second spring 32 increases linearly to always provide a continuous rebound force for the locking member 20, thereby maintaining reliable locking of the workpiece 20 by the locking member 20.

[0048] The second spring 32 can adapt to the movement of the stop 21 and provide axial Z tension to the locking member 20, so that the locking member 20 can apply a continuous and adaptively adjustable axial Z locking force to the workpiece 200 to dynamically compensate for the thermal expansion of the workpiece 200. This can avoid damage to the workpiece 200 or locking failure caused by thermal stress in the rigid connection, and also ensure the rigidity and accuracy of the workpiece 200 positioning during the processing.

[0049] For example, the first spring 31 is a helical spring, and the second spring 32 is a disc spring. Disc springs have high load-bearing capacity and small deformation, and have good buffering and damping effects, providing a large return force for the locking element 20; disc springs have stable performance and long service life in high-load applications.

[0050] Please see Figure 2 and Figure 3 In some embodiments, the surface of the extension 22 is provided with threads 23, and the end of the extension 22 away from the stop 21 is provided with an operating port 2201. The operating port 2201 is configured to connect an operating tool to drive the extension 22 to rotate, so that the extension 22 is connected to the workpiece 200 by the threads 23.

[0051] The workpiece 200 has a threaded hole 2001. When the workpiece 200 is placed into the mounting slot 102, the threaded hole 2001 corresponds to the extension 22, and the first spring 31 is elastically compressed. Under the action of the rebound force of the first spring 31, the extension 22 abuts against the opening of the threaded hole 2001 of the workpiece 200, making it easy for the operating tool to pass through the threaded hole 2001 and connect to the operating port 2201. As the operating tool drives the extension 22 to rotate relative to the workpiece 200, the extension 22 gradually extends into the threaded hole 2001, and the first spring 31 rebounds to continuously push against the stop 21.

[0052] By using an operating tool to rotate the extension 22 relative to the workpiece 200 until the extension 22 is connected to the workpiece 200 by the thread 23, the workpiece 200 remains stationary while the extension 22 rotates. This helps protect the shape of the workpiece 200 and prevents wear from rotation. The thread 23 is an external thread.

[0053] For example, the operating port 2201 is an internal hexagonal socket, and the operating tool is an internal hexagonal wrench. In addition, the operating port 2201 can also be other shapes such as flat head slot, cross slot, square hole, triangular hole, etc., and the operating tool is adapted to the operating port 2201. This application does not limit this.

[0054] Please see Figure 3 In some embodiments, the clamp 100 further includes a support member 40 and a second elastic member 50. The support member 40 is movably disposed on the mounting body 10 along the axial direction Z and can pass through the inner wall of the mounting groove 102. The second elastic member 50 is disposed in the storage compartment 101 and connected to the support member 40 so that the support member 40 elastically contacts the workpiece 200.

[0055] Please combine Figure 4 The inner wall of the mounting groove 102 is provided with an embedded groove 104. The support member 40 is movably disposed in the embedded groove 104. The inner wall of the embedded groove 104 can restrict the movement direction of the support member 40 to the axial direction Z, so as to prevent the support member 40 from swaying radially and enable the support member 40 to move smoothly along the axial direction Z.

[0056] When the workpiece 200 in the mounting groove 102 is not processed, the second elastic element 50 is in an elastically compressed state. After the workpiece 200 is processed, the workpiece 200 heats up and expands, and moves slightly outward from the mounting groove 102. The second elastic element 50 rebounds to drive the support member 40 to move axially Z relative to the mounting body 10, so that the support member 40 and the workpiece 200 maintain elastic contact, thereby providing flexible support force for the workpiece 200 and absorbing the processing vibration of the workpiece 200, so that the workpiece 200 remains stable during the processing and ensures the quality of the processed surface of the workpiece 200 (such as flatness and roundness).

[0057] Please combine Figure 3 and Figure 5In some embodiments, the number of support members 40 and second elastic members 50 can be one, or two or more. When the number of support members 40 and second elastic members 50 is two or more, the two or more support members 40 are distributed circumferentially on the outside of the locking member 20, and each second elastic member 50 corresponds to and is connected to one support member 40, so that the corresponding support member 40 elastically contacts the workpiece 200.

[0058] The increased contact points and contact area between two or more support members 40 and the workpiece 200 provide more stable support for the workpiece 200, improving its vibration damping effect. It also reduces the support strength of a single support member 40 and the second elastic member 50, which helps to disperse stress and ensure the stability and reliability of the structure. The illustrated embodiment shows the case where there are two support members 40 and two elastic members 50.

[0059] Please see Figure 4 In some embodiments, the mounting body 10 is provided with a guide hole 105, which extends along the axial direction Z and penetrates the inner wall of the storage compartment 101 and the inner wall of the embedded groove 104 to connect the storage compartment 101 and the mounting groove 102, so that the second elastic member 50 in the storage compartment 101 can connect to the support member 40, so that the support member 40 elastically contacts the workpiece 200 under the drive of the second elastic member 50.

[0060] The following provides a detailed description of the structure of a support member 40 and a second elastic member 50.

[0061] Please see Figure 5 The support member 40 is connected to a connecting rod 41, which passes through a corresponding guide hole 105 and is configured to connect to the second elastic member 50.

[0062] The second elastic element 50 and the support element 40 are connected by a connecting rod 41 to transmit the elastic force of the second elastic element 50 to the support element 40, so that the support element 40 can flexibly support the workpiece 200 under the drive of the second elastic element 50. The inner wall of the guide hole 105 can guide the axial Z-movement of the connecting rod 41 to prevent the connecting rod 41 from deviating radially or circumferentially, so that the support element 40 can move smoothly along the axial Z-direction under the action of the second elastic element 50.

[0063] In some embodiments, the support member 40 is connected to a plurality of connecting rods 41, which are distributed at intervals along the circumference of the mounting body 10. One end of the plurality of connecting rods 41 away from the support member 40 is connected to an abutment ring 411. The abutment ring 411 is disposed in the storage compartment 101 and is configured to abut against the end face of a second elastic member 50 to transmit the elastic force of the second elastic member 50 to the support member 40.

[0064] Multiple connecting rods 41 connect an abutment ring 411 and a support member 40, enabling the second elastic member 50 to apply balanced and stable flexible support to the support member 40, preventing uneven force distribution or tilting of the support member 40, and ensuring that the support force of the support member 40 on the workpiece 200 is evenly distributed, thereby improving the shock absorption effect on the workpiece 200.

[0065] Please combine Figure 3 and Figure 4 In some embodiments, the storage compartment 101 is provided with a partition wall 13, which is used to separate the first elastic member 30 and the second elastic member 50, or to separate two adjacent second elastic members 50.

[0066] The corresponding second elastic member 50 and abutment ring 411 are sleeved on the outer periphery of the same partition wall 13 and sandwiched between two adjacent partition walls 13, so that the partition wall 13 can limit the elastic deformation direction of the second elastic member 50 and the movement direction of the abutment ring 411 in the axial direction Z, and prevent the second elastic member 50 and abutment ring 411 from radially shaking.

[0067] In some embodiments, the second elastic element 50 is a helical spring.

[0068] In some embodiments, each second cover 12 corresponds to a second elastic element 50. The mounting body 10 is connected to the second cover 12 via a spacer wall 13 threaded 23. The second cover 12 abuts against the second elastic element 50. By rotating the second cover 12, it can be moved axially Z relative to the mounting body 10 to adjust the length of the corresponding second elastic element 50, thereby changing the elastic force applied by the second elastic element 50 to the support member 40. In other embodiments, the first cover 11 can close the entire storage compartment 101, that is, the first cover 11 abuts against the first spring 31 and the second elastic element 50.

[0069] Please see Figure 3 and Figure 5 The support member 40 has a contoured surface 401 facing the inner wall of the mounting groove 102. The contoured surface 401 is configured to connect with the inner wall of the mounting groove 102 and adapt to the outer surface of the workpiece 200.

[0070] The support member 40 flexibly contacts the workpiece 200 through the contoured surface 401, providing flexible support to the workpiece 200 to absorb processing vibrations. The contoured surface 401 is connected to the inner wall of the mounting groove 102 so that the shape of the contoured surface 401 matches the outer surface of the workpiece 200, increasing the contact area between the contoured surface 401 and the outer surface of the workpiece 200. This makes the support force of the support member 40 on the workpiece 200 through the contoured surface 401 evenly distributed, better absorbing the processing vibrations of the workpiece 200, thereby ensuring the stability and accuracy of the workpiece 200 during the processing.

[0071] In some embodiments, the inner wall of the mounting groove 102 and the contoured surface 401 are both arc surfaces.

[0072] The arc surface facilitates the smooth connection and transition between the inner wall of the mounting groove 102 and the contour surface 401. When the workpiece 200 is installed into the mounting groove 102, the inner wall of the mounting groove 102 and the contour surface 401 can adapt to the workpiece 200, whose outer surface is hemispherical, and jointly support the outer surface of the workpiece 200.

[0073] Please see Figure 2 Before using the clamp 100, the extension 22 extends out of the channel 103 and exposes the mounting slot 102.

[0074] Please see Figure 1 When using the fixture 100, the workpiece 200 is placed in the mounting groove 102. Under the push of the workpiece 200, the extension 22 drives the stop 21 to move backward along the Z-axis, so that the first spring 31 is elastically compressed under the pressure of the stop 21. The operating port 2201 corresponds to the threaded hole 2001. The operating tool is used to pass through the threaded hole 2001 and act on the operating port 2201. The operating tool is rotated to make the extension 22 rotate relative to the workpiece 200 and gradually move into the threaded hole 2001, so that the thread 23 of the extension 22 is connected to the threaded hole 2001 of the workpiece 200, so that the workpiece 200 is locked and positioned in the mounting groove 102. At this time, the first spring 31 rebounds and remains in contact with the stop 21.

[0075] The workpiece 200 is machined by a machining equipment. During the machining process, the workpiece 200 will heat up and expand. The workpiece 200 will drive the locking member 20 to move outward along the Z-axis towards the mounting groove 102, that is, drive the locking member 20 forward along the Z-axis. This causes the second spring 32 to be elastically compressed under the pressure of the stop part 21, so that the locking member 20 has an adaptively adjustable axial Z-locking force on the workpiece 200. The second elastic member 50 rebounds to keep the contour surface 401 in contact with the workpiece 200, so as to absorb the vibration of the workpiece 200 during the machining process and keep the workpiece 200 stable during the machining process, so as to ensure the stability and accuracy of the workpiece 200 during the machining process.

[0076] Furthermore, those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the essential spirit and scope of this application fall within the scope of this application's disclosure.

Claims

1. A clamp, characterized in that, include: The mounting body includes a mounting slot, a storage compartment, and a channel, wherein the channel connects the mounting slot and the storage compartment, and the mounting slot is configured to accommodate a workpiece. A locking element is movably disposed in the storage compartment and the channel along the axial direction of the mounting body, and is configured to detachably connect to the workpiece in the mounting slot; A first elastic element is disposed in the storage compartment and connected to the locking element; when the workpiece expands, the locking element presses against the first elastic element, causing the first elastic element to undergo elastic deformation to provide a clearance space for the locking element and the workpiece to move axially relative to the mounting body.

2. The clamp as described in claim 1, characterized in that: The clamp also includes a support member and a second elastic member; The support member is movably disposed on the mounting body along the axial direction and can pass through the inner wall of the mounting groove; The second elastic element is disposed in the storage compartment and connected to the support element so that the support element elastically contacts the workpiece.

3. The clamp as described in claim 2, characterized in that: The support member has a contoured surface facing the inner wall of the mounting groove. The contoured surface is configured to connect with the inner wall of the mounting groove and adapt to the outer surface of the workpiece.

4. The clamp as described in claim 3, characterized in that: The inner wall of the mounting groove and the contoured surface are both arc surfaces.

5. The clamp as described in any one of claims 1 to 4, characterized in that: The locking member includes a stop portion and an extension portion. The stop portion is movably disposed within the storage compartment along the axial direction. The extension portion extends from the stop portion toward the channel and is configured to connect the workpiece. The storage compartment has opposing first and second side walls, and the channel passes through the second side wall; The first elastic element includes a first spring and a second spring. The first spring abuts against the first sidewall and the stop portion, and the second spring is sleeved on the extension portion and abuts against the second sidewall and the stop portion.

6. The clamp as described in claim 5, characterized in that: The surface of the extension is provided with threads; The extension is provided with an operating port at one end away from the stop. The operating port is configured to connect an operating tool to drive the extension to rotate, so that the extension is threadedly connected to the workpiece.

7. The clamp as described in any one of claims 2 to 4, characterized in that: The mounting body is provided with a guide hole, which extends along the axial direction and connects the storage compartment and the mounting groove; The support member is connected to a connecting rod, which passes through the guide hole and is configured to connect to the second elastic member.

8. The clamp as described in claim 7, characterized in that: The support member is connected to multiple connecting rods, which are distributed circumferentially along the mounting body. Each connecting rod is connected to an abutment ring at its end away from the support member. The abutment ring is located in the storage compartment and is configured to abut against the second elastic member.

9. The clamp as described in claim 7, characterized in that: The number of the support member and the second elastic member are both two or more; the two or more support members are distributed at intervals along the circumference of the mounting body on the outside of the locking member, and each second elastic member corresponds to and is connected to one support member, so that each support member elastically contacts the workpiece.

10. The clamp as described in claim 5, characterized in that: The inner wall of the mounting body is threadedly connected to a first cover, and the first sidewall is disposed on the first cover. The first cover is configured to adjust the length of the first elastic element.

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