Self-centering clamp

Abstract

The utility model relates to a self-centering clamp, which is used for carrying out self-centering fixation on a circular piece, and comprises a sucking disc, a clamping device and a clamping device, the clamping claws are configured to be in contact with the side edge of the circular piece placed on the suction cup; the plurality of clamping claws are arranged on the guide disc, and the guide disc is configured to guide the plurality of clamping claws to move in a mode of contracting and releasing relative to the center of the sucking disc; the driving component is configured to drive the multiple clamping jaws so that the multiple clamping jaws can be guided by the guide disc to move, the suction cup is arranged above the guide disc, and the outer contour of the surface of the suction cup is in a complete circle shape. Therefore, the circular part can be accurately fixed in the center position of the suction cup.

Description

Technical Field

[0001] The present disclosure relates to the technical field of machining, and more particularly, to a self-centering fixture. Background Art

[0002] In the computer numerical control (CNC) machining of semiconductor components, the clamping of the semiconductor components is very important, which affects the stability of the semiconductor components during the machining process and thus affects the machining accuracy.

[0003] In the existing CNC machining of circular semiconductor components, generally, vacuum adsorption is used to clamp the semiconductor components. Specifically, a negative pressure environment is formed between the semiconductor component and the suction cup to adsorb the semiconductor component onto the suction cup, so that the semiconductor component remains stable during the machining process, thereby reducing the machining error caused by its movement and improving the machining accuracy.

[0004] However, only fixing the semiconductor component by vacuum adsorption cannot achieve precise fixing of the semiconductor component at the center position of the suction cup. Each time a semiconductor component of a different specification is replaced, it is necessary to re-determine the center of the semiconductor component so that the semiconductor component can be fixed at the center position of the suction cup. This increases the complexity of the operation, consumes time and thus reduces the production efficiency. Summary of the Utility Model

[0005] This section provides a general overview of the present disclosure, rather than a full disclosure of all the scope or all the features of the present disclosure.

[0006] An object of the present disclosure is to provide a self-centering fixture capable of achieving precise fixing of a circular part at the center position of a suction cup.

[0007] To achieve the above object, according to one aspect of the present disclosure, there is provided a self-centering fixture for self-centering and fixing a circular part, comprising:

[0008] A suction cup configured to adsorb a circular part on its surface;

[0009] A plurality of jaws configured to contact the side of the circular part placed on the suction cup;

[0010] A guiding disk on which the plurality of jaws are arranged, and the guiding disk is configured to guide the plurality of jaws to move in a manner of contracting and releasing relative to the center of the suction cup; and

[0011] A driving member configured to drive the plurality of jaws so that the plurality of jaws can move under the guidance of the guiding disk,

[0012] Among them, the suction cup is arranged above the guiding disc, and the outer contour of the surface of the suction cup is a complete circle.

[0013] In some embodiments, the diameter of the suction cup can be equal to the diameter of the guiding disc.

[0014] In some embodiments, the guiding disc can be provided with a plurality of grooves on its surface away from the suction cup. The plurality of grooves are configured to respectively guide the movement of the plurality of jaws, and the bottom of the grooves in the axial direction of the guiding disc is closed.

[0015] In some embodiments, the outer contour of the surface of the guiding disc facing the suction cup can be a complete circle.

[0016] In some embodiments, the jaw can have a C-shaped structure, and the jaw is configured to contact the circular part above the suction cup through the upper part of the C-shaped structure and be driven below the guiding disc through the lower part of the C-shaped structure.

[0017] In some embodiments, the suction cup can be provided with a vacuum groove on its surface for adsorbing the circular part, and a vacuum pipeline is provided on the surface of the suction cup opposite to the said surface. The vacuum pipeline is communicated with the vacuum groove and is used to connect with a vacuum source.

[0018] In some embodiments, the driving member can include a rotating tooth seat and a driving part. The rotating tooth seat is arranged on the side of the guiding disc away from the suction cup, and is provided with guiding teeth for cooperating with the jaws on its surface facing the guiding disc. The driving part is configured to drive the rotating tooth seat to rotate, so as to drive the plurality of jaws to move by means of the guiding teeth.

[0019] In some embodiments, the rotating tooth seat can be provided with a first through hole at its center, the guiding disc can be provided with a cylindrical part protruding towards the side away from the suction cup at its center. The cylindrical part has a second through hole penetrating the guiding disc in the axial direction of the guiding disc, and the cylindrical part is fitted in the first through hole.

[0020] In some embodiments, the self-centering fixture can further include a base, and the guiding disc is fixedly carried on the base.

[0021] In some embodiments, the rotating tooth seat can be accommodated inside the base, and the driving part includes a driving portion for driving the rotating tooth seat to rotate by rotation and an operating portion for rotating the driving portion. The driving portion is arranged inside the base, and the operating portion is arranged outside the base.

[0022] According to the above technical solution, by providing a plurality of jaws and providing a guide plate and a driving member that enable the jaws to move in a manner of contracting and releasing relative to the center of the suction cup, when a circular member is disposed on the suction cup, these jaws can contract toward the center of the suction cup by the driving of the driving member and with the guidance of the guide plate. Thus, the circular member is pushed to move on the suction cup and be centered thereon, so that precise fixation of the circular member at the central position of the suction cup can be achieved. Since the realization of this precise fixation only requires operating the driving member to drive the jaws and does not require manual adjustment, the complexity of the operation is reduced, the operation time is shortened, and the production efficiency is thereby improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The features and advantages of the embodiments of the present disclosure will become more readily apparent from the following description with reference to the accompanying drawings. The drawings are not drawn to scale, and some features may be enlarged or reduced to show details of particular components.

[0024] In the drawings:

[0025] Figure 1 FIG. 1 is a schematic exploded view of a self-centering jig according to an embodiment of the present disclosure.

[0026] Figure 2 FIG. 2 is a schematic exploded view of a self-centering jig according to another embodiment of the present disclosure.

[0027] Figure 3 FIG. 3 is Figure 2 a top view of the self-centering jig shown in FIG. 1.

[0028] Figure 4 FIG. 4 is Figure 2 a side view of the self-centering jig shown in FIG. 1.

[0029] Figure 5 FIG. 5 is a front view of the self-centering jig observed from one side of line A-A of FIG. 3. Figure 3 FIG. 6 is a sectional view of the self-centering jig taken along line A-A of FIG. 3.

[0030] Figure 6 FIG. 7 is Figure 3 a sectional view of the self-centering jig taken along line A-A of FIG. 4.

[0031] Figure 7 FIG. 8 is a front view of the self-centering jig observed from one side of line B-B of FIG. 5. Figure 3 FIG. 9 is a sectional view of the self-centering jig taken along line B-B of FIG. 5.

[0032] Figure 8 FIG. 10 is Figure 3 a side view of the guide plate.

[0033] Figure 9 FIG. 11 is a side view of the guide plate.

[0034] Figure 10Is a front view of the guiding disk.

[0035] Figure 11 Is a side view of the jaw.

[0036] Figure 12 Is a side view of the suction cup.

[0037] Figure 13 Is Figure 12 A cross-sectional view of the suction cup of... along the diameter.

[0038] Figure 14 Is a side view of the rotating tooth seat.

[0039] Figure 15 Is a side view of the driving member.

[0040] Figure 16 Is a schematic diagram showing the cooperation of the rotating tooth seat, the driving member and the jaw.

[0041] In the drawings, the same or corresponding technical features or components are denoted by the same or corresponding reference numerals. Detailed implementation mode

[0042] The present disclosure will be described in detail below with reference to the drawings and by means of exemplary embodiments. It should be noted that the following detailed description of the present disclosure is for illustrative purposes only and is by no means a limitation of the present disclosure.

[0043] It should be noted that, for clarity, not all features of a specific embodiment are described and shown in the specification and the drawings, and, in order to avoid unnecessary details obscuring the technical solution of interest of the present disclosure, only the device structures closely related to the technical solution of the present disclosure are described and shown in the specification and the drawings, while other details that are not closely related to the technical content of the present disclosure and are known to those skilled in the art are omitted.

[0044] Refer to Figures 1 to 8 , according to an embodiment of the present disclosure, a self-centering fixture 1 is provided, which is used for self-centering and fixing a circular part 2.

[0045] The circular part 2 can be, for example, the semiconductor component mentioned above, such as a wafer, or any other circular workpiece.

[0046] As Figure 1 shown in..., the self-centering fixture 1 includes a suction cup 10, a plurality of jaws 20, a guiding disk 30 and a driving member 40.

[0047] The suction cup 10 is configured to adsorb the circular part 2 on its surface 101. After the circular part 2 is placed at the expected position on the surface 101 of the suction cup 10, the suction cup 10 can form a negative pressure environment between the circular part 2 and the surface 101 to firmly adsorb the circular part 2 on the surface 101.

[0048] The claws 20 are configured to contact the side 2a of the circular part 2 placed on the suction cup 10, so as to move the circular part 2 to the central position on the surface 101 by pushing the side 2a of the circular part 2. The number of claws 20 can be at least 2, but can also be 3 or more. Figure 3 4 claws 20 are shown in the figure.

[0049] The plurality of claws 20 are arranged on the guiding disk 30, and the guiding disk 30 is configured to guide the plurality of claws 20 to move in a manner of contracting and releasing relative to the center of the suction cup 10.

[0050] That is to say, the guiding disk 30 can guide these claws 20 to move towards the center of the suction cup 10 to contract or gather, and can also guide these claws 20 to move to release or disperse from the center of the suction cup 10. Through this contraction or gathering movement of these claws 20, the circular part 2 can be pushed by the claws 20 on the surface 101 of the suction cup 10 so that its center is located on the center of the suction cup 10, that is, centered on the suction cup 10.

[0051] The driving member 40 is configured to drive the plurality of claws 20 so that these claws 20 can move as described above under the guidance of the guiding disk 30. It can be understood that the power for moving the claws 20 comes from the driving member 40, and the guiding disk 30 is only used to make the claws 20 move along the expected trajectory.

[0052] For example, in the Figure 1 example shown in the figure, 4 claws 20 are evenly arranged around the circumference of the suction cup 10. When the circular part 2 is arranged on the surface 101 of the suction cup 10, the 4 claws 20 contract or gather towards the center of the suction cup 10 by the drive of the driving member 40 and with the help of the guidance of the guiding disk 30. Thus, the 4 claws 20 push the circular part 2 to move on the surface 101 of the suction cup 10 to be centered on the suction cup 10. Then, the circular part 2 in place can be adsorbed by the suction cup 10, thereby realizing the precise fixation of the circular part 2 at the central position of the suction cup 10.

[0053] Since only the driving member 40 needs to be used to drive the claws 20, the precise positioning of the circular part 2 at the central position of the suction cup can be realized with the help of the guidance of the guiding disk 30 for the claws 20 and thus precise fixation can be achieved without manual adjustment. Therefore, the complexity of the operation is reduced, the operation time is shortened, and the production efficiency is thus improved.

[0054] In an embodiment according to the present disclosure, referring to Figure 1 , Figure 2 and Figures 5 to 8 , the suction cup 10 is arranged above the guiding disc 30, and the outer contour of the surface 101 of the suction cup 10 is a complete circle.

[0055] By placing the suction cup 10 above the guiding disc 30, the size of the suction cup 10 can be unrestricted by the size of the guiding disc 30. That is to say, the suction cup 10 can be manufactured to have a diameter greater than or equal to the diameter of the guiding disc 30. Thus, a larger adsorption area can be provided, enabling adaptation to various specifications, such as circular parts 2 of various diameters. In addition, when the diameter of the adsorbed circular part 2 is greater than the diameter of the suction cup 10, when the suction cup 10 is located above the guiding disc 30, the circular part 2 will only contact the suction cup 10 when adsorbed, and will not contact the guiding disc 30. Thus, the stability of the support of the suction cup 10 for the circular part 2 is improved, and the firmness of adsorption is thereby enhanced.

[0056] By making the outer contour of the surface 101 of the suction cup 10 a complete circle, a larger adsorption area can be provided under the same diameter, which is beneficial to improving the firmness of adsorption. In addition, when the circular part 2 is adsorbed to the suction cup 10, the complete circle can provide a relatively uniform adsorption force in each area of the circular part 2. Thus, damage to the circular part 2 caused by uneven stress can be avoided. In particular, when the circular part 2 is a part made of a hard and brittle material such as a semiconductor component, providing a uniform adsorption force in each area of the circular part 2 will be particularly advantageous.

[0057] In some embodiments, as Figures 2 to 8 shown, the self - centering fixture 1 may further include a base 50, and the guiding disc 30 is fixedly carried on the base 50.

[0058] The guiding disc 30 is fixed to the base 50, for example, by screws 1a, and the suction cup is fixed to the guiding disc 30, for example, by screws 1a. Thus, the base 50 can provide stable support for the suction cup 10. The base 50 can be fixed to the tabletop of a CNC device, for example, by screws, so as to facilitate CNC machining of the circular part 2 self - centered and fixed by the self - centering fixture 1.

[0059] In some embodiments, referring to Figure 1 , Figure 2 and Figures 5 to 8 , the diameter of the suction cup 10 may be equal to the diameter of the guiding disc 30.

[0060] In this way, it is possible to make the guide plate 30 provide support for the suction cup 10 over the entire area of the suction cup 10 while making the adsorption area of the suction cup 10 as large as possible, so that the suction cup 10 can provide more stable adsorption for the circular part 2. In addition, the equal diameters enable the guide plate 30 to protect the suction cup 10 from being damaged by accidental collisions from the side or bottom.

[0061] In some embodiments, referring to Figure 9 and Figure 10 , a plurality of grooves 301a are provided on the surface 301 of the guide plate 30 away from the suction cup 10, and the plurality of grooves 301a are configured to respectively guide the movement of the plurality of jaws 20, and the bottom of the grooves 301a in the axial direction of the guide plate 30 is closed.

[0062] The grooves 301a can guide the jaws 20 to move in the manner of contracting and releasing relative to the center of the suction cup 10 as mentioned above. For example, in the example shown in Figure 1 , the guide plate 30 and the suction cup 10 are concentrically arranged. In this case, the grooves 301a can extend in the radial direction of the guide plate 30. For example, for the 4 jaws 20 arranged circumferentially around the suction cup 10 uniformly as shown in Figure 1 , 4 grooves 301a can be correspondingly provided to guide the 4 jaws 20 to move in the manner of contracting and releasing relative to the center of the suction cup 10.

[0063] The openings of the grooves 301a face the side of the guide plate 30 away from the suction cup 10, and the bottom of the grooves 301a in the axial direction is closed, that is to say, the grooves 301a do not penetrate the guide plate 30 in the axial direction. Thus, it is allowed that the guide plate 30 has a complete circular contour so that a suction cup 10 with as large an adsorption area as possible can be carried on the guide plate 30, so that the self-centering fixture 1 can adapt to circular parts 2 of various specifications.

[0064] In some embodiments, as more clearly shown in Figure 1 , Figure 2 as well as Figure 9 and Figure 10 , the outer contour of the surface 302 of the guide plate 30 facing the suction cup is a complete circle. As discussed before, in this way, a suction cup 10 with as large an adsorption area as possible can be carried on the guide plate 30, so that the self-centering fixture 1 can adapt to circular parts 2 of various specifications.

[0065] In some embodiments, referring to Figure 11, the jaw 20 may have a C-shaped structure, and the jaw 20 is configured to contact the circular member 2 above the suction cup 10 through the upper part 201 of the C-shaped structure, and be driven below the guiding plate 30 through the lower part 202 of the C-shaped structure.

[0066] When the outer contour of the surface 302 of the guiding plate 30 is a complete circle, by configuring the jaw 20 to have a C-shaped structure, it can be driven by the driving member 40 via the lower part 202, and contact and push the circular member 2 through the upper part 201 without interfering with the guiding plate 30, and thus without affecting the stability of the movement of the jaw 20.

[0067] In some embodiments, referring to Figure 12 and Figure 13 , the suction cup 10 may be provided with a vacuum groove 10a on its surface 101 for adsorbing the circular member 2, and a vacuum pipeline 10b is provided on its surface 102 opposite to the surface 101. The vacuum pipeline 10b communicates with the vacuum groove 10a and is used to connect to a vacuum source (not shown).

[0068] The vacuum source is a device or system capable of generating a vacuum state. For example, it can be a vacuum pump, etc. By connecting the vacuum pipeline 10b to the vacuum source, for example, through a pipeline, and making the vacuum pipeline 10b communicate with the vacuum groove 10a, a vacuum adsorption force can be provided in the vacuum groove 10a to adsorb the circular member 2.

[0069] As Figure 12 more clearly shown, the vacuum groove 10a is in the form of a plurality of concentric rings about the center of the surface 101 of the suction cup 10. However, the vacuum groove 10a can also adopt any other form.

[0070] In some embodiments, referring to Figures 14 to 16 , the driving member 40 may include a rotating tooth base 401 and a driving member 402. The rotating tooth base 401 is arranged on the side of the guiding plate 30 away from the suction cup 10, and a guiding tooth 4011 for cooperating with the jaw 20 is provided on its surface 401a facing the guiding plate 30. The driving member 402 is configured to drive the rotating tooth base 401 to rotate, so as to drive the plurality of jaws 20 to move by means of the guiding tooth 4011.

[0071] The guiding tooth 4011 is in the form of a concentric ring about the center of the rotating tooth base 401. A tooth 2021 for cooperating with the guiding tooth 4011 is provided on the lower part 202 of the jaw 20 (see Figure 11) As the rotary tooth seat 401 rotates about its center, the guiding teeth 4011 can drive the clamping jaw 20 to move. Under the guidance of the groove 301a of the guiding disk 30, the clamping jaw 20 can move back and forth in the groove 301a as the rotary tooth seat 401 rotates clockwise and counterclockwise, so as to realize the movement of contracting and releasing relative to the center of the suction cup 10.

[0072] Exemplarily, as Figure 14 and Figure 15 shown, a tooth-shaped structure 4012 is provided on the surface 401b of the rotary tooth seat 401 away from the guiding disk 30, and a tooth-shaped structure is also provided on the part of the driving member 402 in contact with the rotary tooth seat 401, so as to drive the rotary tooth seat 401 to rotate about its center through cooperation with the tooth-shaped structure 4012 of the rotary tooth seat 401.

[0073] In some embodiments, referring to Figure 1 , Figure 2 , Figure 6 , Figure 9 , Figure 10 and Figure 14 , the rotary tooth seat 401 may be provided with a first through hole 4013 at its center, the guiding disk 30 may be provided with a cylindrical portion 303 protruding toward the side away from the suction cup 10 at its center, the cylindrical portion 303 has a second through hole 3031 penetrating the guiding disk 30 in the axial direction of the guiding disk 30, and the cylindrical portion 303 is fitted in the first through hole 4013.

[0074] By providing the first through hole 4013 and the second through hole 3031, it is allowed to connect the vacuum pipeline 10b of the suction cup 10 arranged above the rotary tooth seat 401 and the guiding disk 30 to a vacuum source, so as to provide a vacuum adsorption force through the suction cup 10. Moreover, by providing the cylindrical portion 303 and fitting the cylindrical portion 303 in the first through hole 4013, the position of the rotary tooth seat 401 can be fixed relative to the guiding disk 30, thereby improving the stability of the movement of the clamping jaw 20, and thus improving the self-centering accuracy of the self-centering fixture 1 for the circular part 2.

[0075] In some embodiments, referring to Figures 2 to 8 and Figure 15 , the rotary tooth seat 401 can be accommodated inside the base 50, and the driving member 402 can include a driving part 4021 for driving the rotary tooth seat 401 to rotate by rotation and an operating part 4022 for rotating the driving part 4021, the driving part 4021 is arranged inside the base 50, and the operating part 4022 is arranged outside the base 50.

[0076] In Figure 1In the example shown, the driving part 4021 of the driving member 402 is shown as a toothed structure, and the operating part 4022 is shown as a screwing rod. The operating part 4022 of the driving member 402 can pass through a hole (not shown) provided in the circumferential wall of the base 50, so that the driving part 4021 is arranged in a groove 501 provided at the inner wall of the base 50 and is installed in place by a block 502. Thus, the driving part 4021 is arranged inside the base 50, and the operating part 4022 is arranged outside the base 50, facilitating the self-centering of the circular member 2 simply by operating the operating part 4022 of the driving member 402.

[0077] In the present disclosure, the use of terms such as "first", "second", etc. is only for the purpose of convenience of description and should not be regarded as restrictive. In addition, although the present disclosure has been described with reference to exemplary embodiments, it should be understood that the present disclosure is not limited to the specific embodiments described and shown in detail herein. Without departing from the scope defined by the claims of the present disclosure, those skilled in the art can make various changes to the exemplary embodiments.

[0078] The features mentioned and / or shown in the above description of the exemplary embodiments of the present disclosure can be combined in the same or similar manner into one or more other embodiments, combined with the features in other embodiments or replace the corresponding features in other embodiments. The technical solutions obtained by such combination or replacement should also be regarded as being included in the protection scope of the present disclosure.

Claims

1. A self-centering fixture for self-centering and fixing a circular part, characterized in that: include: a suction cup configured to absorb the circular member on its surface; a plurality of claws configured to contact the sides of the circular member placed on the suction cup; a guide plate on which the plurality of claws are arranged and configured to guide the plurality of claws to move in a manner of contracting and releasing relative to a center of the suction cup; as well as a driving member configured to drive the plurality of claws so that the plurality of claws can move under the guidance of the guide plate, The suction cup is arranged above the guide plate, and the outer contour of the surface of the suction cup is a complete circle.

2. The self-centering fixture according to claim 1, characterized in that: The diameter of the suction cup is equal to the diameter of the guide plate.

3. The self-centering fixture according to claim 1 or 2, characterized in that: The guide plate is provided with a plurality of grooves on a surface thereof away from the suction cup, the plurality of grooves being configured to respectively guide the movement of the plurality of claws, and the bottoms of the grooves in the axial direction of the guide plate are closed.

4. The self-centering fixture according to claim 1 or 2, characterized in that: The outer contour of the surface of the guide plate facing the suction cup is a complete circle.

5. The self-centering fixture according to claim 4, characterized in that: The clamping claw has a C-shaped structure, and the clamping claw is configured to contact the circular member above the suction cup through an upper portion of the C-shaped structure and be driven below the guide plate through a lower portion of the C-shaped structure.

6. The self-centering fixture according to claim 1 or 2, characterized in that: The suction cup is provided with a vacuum groove on its surface for adsorbing the circular member, and the suction cup is provided with a vacuum pipe on its surface opposite to the surface of the suction cup, the vacuum pipe is communicated with the vacuum groove and is used to be connected to a vacuum source.

7. The self-centering fixture according to claim 1 or 2, characterized in that: The driving member includes a rotating gear seat and a driving member. The rotating gear seat is arranged on a side of the guide plate away from the suction cup, and is provided with guide teeth for cooperating with the claws on its surface facing the guide plate. The driving member is configured to drive the rotating gear seat to rotate so as to drive the multiple claws to move with the help of the guide teeth.

8. The self-centering fixture according to claim 7, characterized in that The rotating gear seat is provided with a first through hole at its center, and the guide plate is provided with a cylindrical portion protruding toward a side away from the suction cup at its center, the cylindrical portion has a second through hole passing through the guide plate in the axial direction of the guide plate, and the cylindrical portion is fitted in the first through hole.

9. The self-centering fixture according to claim 7, characterized in that: A base is also included, and the guide plate is fixedly supported on the base.

10. The self-centering fixture according to claim 9, characterized in that The rotating gear holder is accommodated inside the base, and the driving member includes a driving part for driving the rotating gear holder to rotate by rotation and an operating part for rotating the driving part, the driving part is arranged inside the base, and the operating part is arranged outside the base.

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