Chuck workpiece clamping device

Abstract

The invention belongs to the technical field of machining, and discloses a chuck workpiece clamping device which comprises a support and a positioning mechanism, the support is located above a chuck, a plurality of connecting holes are formed in the support, a positioning piece is connected to a connecting piece, the connecting piece is rotationally arranged in the corresponding connecting holes, and according to the hole diameter of an inner hole of a workpiece, the positioning mechanism is arranged on the support. The stretching and retracting of the positioning mechanisms relative to the support are adjusted, so that the diameter of a circle defined by the multiple positioning pieces is slightly smaller than the diameter of an inner hole of a workpiece, then the tool clamp is placed in the inner hole of the workpiece, the multiple positioning mechanisms are aligned to the clamping jaw positions of the chuck, the connecting pieces are rotated, and the connecting pieces can move in the axis direction of the connecting hole; and meanwhile, the clamping claws are clamped on the outer side wall of the workpiece, so that the workpiece is quickly clamped, the universality is high, the clamped workpiece is ensured not to deform, the form and location tolerance of the workpiece is within a specified range, and the workpiece is further ensured to be smoothly machined.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, in particular to a chuck workpiece clamping device. Background Art

[0002] The workpiece is processed on a common lathe, CNC lathe or a machine tool that uses a chuck to clamp the workpiece. In the field of semiconductor components, high-cavity thin-walled parts are widely used.

[0003] When the chuck is clamping a thin-walled workpiece, if the clamping force of the chuck is large, the radial clamping force will cause the workpiece to deform, and the design requirements and geometric tolerances cannot be guaranteed. Therefore, it is necessary to design a dedicated fixture for each workpiece, which is costly. If the clamping force of the chuck is small, the workpiece cannot be clamped, causing the workpiece to fall off and cannot be processed later.

[0004] Therefore, a chuck workpiece clamping device is urgently needed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a chuck workpiece clamping device for assisting in clamping a workpiece clamped on a chuck, which has strong versatility and ensures that the clamped workpiece will not be deformed, so that the shape and position tolerances of the workpiece are within a specified range, thereby ensuring that the workpiece can be processed smoothly.

[0006] In order to solve the above problems existing in the prior art, the present invention adopts the following technical solutions:

[0007] The chuck workpiece clamping device is used to assist in clamping the workpiece clamped on the chuck, and the chuck workpiece clamping device comprises:

[0008] A support, the support is located above the chuck and is provided with a plurality of connection holes;

[0009] A positioning assembly, wherein the positioning assembly includes a plurality of positioning mechanisms, and the plurality of positioning mechanisms are evenly spaced on the support along the circumferential direction of the chuck. The positioning mechanism includes a connecting member and a positioning member, and the positioning member is connected to the connecting member. The connecting member is rotated in the corresponding connecting hole, and the connecting member can move along the axial direction of the connecting hole so that the positioning member is pressed against the inner wall of the workpiece.

[0010] Preferably, the support is an annular structure.

[0011] Preferably, the central axis of the support coincides with the central axis of the chuck.

[0012] Preferably, the outer circumference of the connecting piece is provided with an external thread, the hole wall of the connecting hole is provided with an internal thread, and the connecting piece is threadedly connected to the connecting hole.

[0013] Preferably, the connecting member is configured as a screw.

[0014] Preferably, the cross-section of the positioning member is in a fan-shaped structure.

[0015] Preferably, the connecting member is provided with a ball head, and the positioning member is provided with a ball socket, and the ball head is located in the ball socket, so that the connecting member and the positioning member can be rotatably matched.

[0016] Preferably, the diameter of the connecting piece is 20 mm.

[0017] Preferably, the positioning member is made of aluminum material.

[0018] Preferably, central axes of the plurality of positioning mechanisms intersect at the same point.

[0019] The beneficial effects of the present invention are:

[0020] The chuck workpiece clamping device provided by the present invention has a support located above the chuck, and the support is provided with a plurality of connecting holes. The positioning assembly includes a plurality of positioning mechanisms, and the plurality of positioning mechanisms are evenly spaced on the support along the circumferential direction of the chuck. The positioning mechanism includes a connecting piece and a positioning piece, and the positioning piece is connected to the connecting piece, and the connecting piece is rotated in the corresponding connecting hole, and the connecting piece can move along the axial direction of the connecting hole, so that the positioning piece is pressed against the inner wall of the workpiece. According to the inner hole diameter of the workpiece, the telescopic extension of the positioning mechanism relative to the support is adjusted, so that the circular diameter formed by the plurality of positioning pieces is slightly smaller than the inner hole diameter of the workpiece, and then the tooling fixture is placed in the inner hole of the workpiece, and the plurality of positioning mechanisms are respectively aligned with the claw positions of the chuck, and then the connecting piece is rotated, and the connecting piece can move relative to the support along the axial direction of the connecting hole, so that the positioning piece can be pressed against the inner wall of the workpiece, and at the same time, the claws of the chuck are clamped on the outer wall of the workpiece, so that the workpiece is quickly clamped. The fixture is used to assist in clamping the workpiece clamped on the chuck. It has strong versatility and allows the inner hole of the workpiece to have multiple support points, thereby changing the direction of the force point, ensuring that the clamped workpiece will not be deformed, and making the shape and position tolerances of the workpiece within the specified range, thereby ensuring that the workpiece can be processed smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the structure of a chuck workpiece clamping device, a chuck and a workpiece provided in an embodiment of the present invention;

[0022] Figure 2 A schematic structural diagram of a chuck workpiece clamping device provided in an embodiment of the present invention;

[0023] Figure 3 A schematic structural diagram of a positioning member provided in an embodiment of the present invention.

[0024] Reference numerals:

[0025] 100, chuck; 200, workpiece;

[0026] 1. Support;

[0027] 2. Positioning mechanism; 21. Connecting piece; 22. Positioning piece. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0032] like Figure 1-Figure 3As shown, in this embodiment, the chuck workpiece clamping device is used to assist in clamping the workpiece 200 clamped on the chuck 100, and the chuck workpiece clamping device includes a support 1 and a positioning assembly. Among them, the support 1 is located above the chuck 100, and the support 1 is provided with a plurality of connecting holes. The positioning assembly includes a plurality of positioning mechanisms 2. Along the circumferential direction of the chuck 100, the plurality of positioning mechanisms 2 are evenly spaced on the support 1. The positioning mechanism 2 includes a connecting member 21 and a positioning member 22. The positioning member 22 is connected to the connecting member 21. The connecting member 21 is rotated in the corresponding connecting hole, and the connecting member 21 can move along the axial direction of the connecting hole so that the positioning member 22 is pressed against the inner wall of the workpiece 200. Specifically, the chuck 100 is a three-claw structure, the workpiece 200 is a semiconductor high-cavity thin-walled part, the support 1 is placed on the chuck 100, and the support 1 is provided with three connection holes, which are arranged at equal intervals along the circumferential direction of the chuck 100, and the angle between the central axes of each two adjacent connection holes is 120 degrees. A plurality of positioning mechanisms 2 are distributed at equal intervals and arranged one-to-one with the three claws of the chuck 100, and the positioning mechanism 2 includes a connecting member 21 and a positioning member 22, the connecting member 21 is arranged as a connecting rod, and the positioning member 22 is arranged as a cushion block, and the plurality of connecting members 21 are respectively rotated to penetrate the corresponding connecting holes of the support 1 and connected to the positioning member 22, and the connecting member 21 can move relative to the support 1 along the axial direction of the connecting hole, so that the positioning member 22 can abut against the inner wall of the workpiece 200.

[0033] The working principle of the chuck workpiece clamping device is as follows: first, according to the inner hole diameter of the workpiece 200, the extension and contraction of the positioning mechanism 2 relative to the support 1 is adjusted so that the diameter of the circle formed by the multiple positioning members 22 is slightly smaller than the inner hole diameter of the workpiece 200. Then, the tooling fixture is placed in the inner hole of the workpiece 200, and the multiple positioning mechanisms 2 are respectively aligned with the claw positions of the chuck 100. Next, the connecting member 21 is rotated, and the connecting member 21 can move relative to the support 1 along the axial direction of the connecting hole, so that the positioning member 22 can abut against the inner wall of the workpiece 200. At the same time, the claws of the chuck 100 are clamped on the outer wall of the workpiece 200 to complete the rapid clamping of the workpiece 200. The fixture is used to assist in clamping the workpiece 200 clamped on the chuck 100, and has strong versatility, so that the inner hole of the workpiece 200 has multiple supporting points, thereby changing the direction of the force point, ensuring that the clamped workpiece 200 will not be deformed, so that the shape and position tolerance of the workpiece 200 is within the specified range, thereby ensuring that the workpiece 200 can be processed smoothly. Optionally, the chuck workpiece clamping device is also suitable for chucks 100 such as four-jaws, six-jaws, and eight-jaws, and the corresponding number of positioning mechanisms 2 is four, six, eight, and so on.

[0034] Further, refer to Figure 1-Figure 2, the support 1 is annular. Specifically, since the processed semiconductor thin-walled part is annular, the support 1 is set to be annular to match the shape of the semiconductor thin-walled part, ensuring that multiple positioning mechanisms 2 can be simultaneously pressed against the inner wall of the semiconductor thin-walled part, so that the inner hole of the semiconductor thin-walled part has multiple supporting points, thereby changing the direction of the force point and ensuring that the clamped workpiece 200 will not be deformed.

[0035] Further, continue to refer to Figure 1-Figure 2 , the central axis of the support 1 coincides with the central axis of the chuck 100. Specifically, the chuck 100 clamps the workpiece 200, that is, the multiple claws of the chuck 100 are pressed against the outer wall of the workpiece 200, so that the central axis of the workpiece 200 coincides with the central axis of the chuck 100. At the same time, the fixture is placed in the inner hole of the workpiece 200, the central axis of the support 1 coincides with the central axis of the chuck 100, and the multiple positioning mechanisms 2 simultaneously press against the inner wall of the workpiece 200 to ensure the clamping accuracy and requirements of the chuck 100 and the fixture for the workpiece 200.

[0036] Further, continue to refer to Figure 1-Figure 2 The outer periphery of the connecting member 21 is provided with an external thread, the hole wall of the connecting hole is provided with an internal thread, and the connecting member 21 is threadedly connected with the connecting hole. Specifically, the connecting member 21 is set as a screw, and the diameter of the connecting member 21 is 20 mm. By rotating the connecting member 21, the connecting member 21 can move relative to the support 1 along the axial direction of the connecting hole, so that the positioning member 22 can abut against the inner wall of the workpiece 200, so as to realize the linear movement of the connecting member 21 and the versatility of adapting to the inner holes of multiple workpieces 200 of different sizes.

[0037] Further, refer to Figure 3 The cross-section of the positioning member 22 is fan-shaped. Specifically, the positioning member 22 is made of aluminum material, and the cross-section of the positioning member 22 is fan-shaped, so that the surface of the positioning member 22 in contact with the inner wall of the inner hole of the workpiece 200 is an arc surface, and the surface contacts and abuts reliably, thereby ensuring that the workpiece 200 is firmly clamped.

[0038] Further, continue to refer to Figure 1-Figure 2The connecting member 21 is provided with a ball head, and the positioning member 22 is provided with a ball socket, and the ball head is located in the ball socket, so that the connecting member 21 and the positioning member 22 can be rotatably matched. Specifically, through the cooperation between the ball head and the ball socket, the positioning member 22 is rotatably connected with the connecting member 21, and the telescopic movement of the positioning mechanism 2 relative to the support 1 is adjusted according to the inner hole diameter of the workpiece 200, so that the diameter of the circle formed by the multiple positioning members 22 is slightly smaller than the inner hole diameter of the workpiece 200, and then, the fixture is placed in the inner hole of the workpiece 200, and the multiple positioning mechanisms 2 are respectively aligned with the claw positions of the chuck 100, and then, the connecting member 21 is rotated, and the connecting member 21 can be moved along the inner hole of the workpiece 200. The axial direction of the connecting hole moves relative to the support 1. When the positioning member 22 is almost in contact with the inner wall of the workpiece 200, the positioning member 22 is rotated so that the top surfaces of multiple positioning members 22 are in the same horizontal plane, that is, the top surfaces of the positioning members 22 are arranged parallel to the top surface of the chuck 100. Finally, the positioning member 22 is stably in contact with the inner wall of the workpiece 200, and the claws of the chuck 100 are clamped on the outer wall of the workpiece 200, completing the rapid clamping of the workpiece 200, which is stable and not easy to loosen.

[0039] Further, continue to refer to Figure 1-Figure 2 , the central axes of the multiple positioning mechanisms 2 all intersect at the same point. Specifically, the central axes of the multiple connecting members 21 intersect at one point, and the forces between the supporting points formed by the multiple positioning mechanisms 2 on the inner hole of the workpiece 200 are balanced, and the appearance is good.

[0040] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A chuck workpiece clamping device, used for assisting in clamping a workpiece (200) clamped on a chuck (100), characterized in that: The chuck workpiece clamping device comprises: A support (1), the support (1) being located above the chuck (100), and the support (1) being provided with a plurality of connection holes; A positioning assembly, the positioning assembly comprising a plurality of positioning mechanisms (2), the plurality of positioning mechanisms (2) being evenly spaced on the support (1) along the circumferential direction of the chuck (100), the positioning mechanism (2) comprising a connecting member (21) and a positioning member (22), the positioning member (22) being connected to the connecting member (21), the connecting member (21) being rotatably disposed in the corresponding connecting hole, and the connecting member (21) being able to move along the axial direction of the connecting hole so that the positioning member (22) is pressed against the inner wall of the workpiece (200).

2. The chuck workpiece clamping device according to claim 1, characterized in that: The support (1) is in an annular structure.

3. The chuck workpiece clamping device according to claim 1, characterized in that: The central axis of the support (1) coincides with the central axis of the chuck (100).

4. The chuck workpiece clamping device according to claim 1, characterized in that: The outer periphery of the connecting piece (21) is provided with an external thread, the hole wall of the connecting hole is provided with an internal thread, and the connecting piece (21) is threadedly connected to the connecting hole.

5. The chuck workpiece clamping device according to claim 1, characterized in that: The connecting member (21) is configured as a screw.

6. The chuck workpiece clamping device according to claim 1, characterized in that: The cross-section of the positioning member (22) is in a fan-shaped structure.

7. The chuck workpiece clamping device according to claim 1, characterized in that: The connecting member (21) is provided with a ball head, and the positioning member (22) is provided with a ball socket. The ball head is located in the ball socket so that the connecting member (21) and the positioning member (22) can be rotationally matched.

8. The chuck workpiece clamping device according to claim 1, characterized in that: The diameter of the connecting piece (21) is 20 mm.

9. The chuck workpiece clamping device according to claim 1, characterized in that: The positioning member (22) is made of aluminum material.

10. The chuck workpiece clamping device according to claim 1, characterized in that: The central axes of the plurality of positioning mechanisms (2) all intersect at the same point.

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