Workpiece clamping auxiliary device

Abstract

The present application provides a workpiece clamping auxiliary device, comprising a first potting chuck, a second potting chuck, a centering frame, a first retainer and a second retainer which are separately arranged. A first clamping groove and a first centering groove are provided at one end of the first potting chuck. The centering frame comprises a mounting portion and a supporting portion which are connected and arranged, the mounting portion is used to be detachably connected to the workpiece, and the supporting portion is used to be inserted into the first centering groove so that one end of the workpiece is located in the first clamping groove. The first clamping groove is used to inject adhesive to fix one end of the workpiece to the first potting chuck. A second clamping groove is provided at one end of the second potting chuck, and the second clamping groove is used to inject adhesive to fix the other end of the workpiece to the second potting chuck. The first retainer and the second retainer are used to keep the first potting chuck and the second potting chuck coaxial and form a space for accommodating the workpiece. The workpiece clamping auxiliary device provided by the present application can facilitate the clamping of small-sized workpieces without being limited by the cross-sectional size of the workpiece.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical clamping tools, and in particular to a workpiece clamping auxiliary device. Background Art

[0002] Some small-sized workpieces often have difficulty in clamping when undergoing mechanical property tests, making some test items difficult to complete.

[0003] For example, glass materials often need to be tested for tensile strength or flexural strength through uniaxial tension or bending tests. If the tensile strength is directly tested through uniaxial tension on glass samples, when the glass samples are round rods or small in size, the uniaxial tension test has the problem of "difficulty in clamping the sample", resulting in the inability to complete the tensile test. At this time, the bending strength of the glass sample can only be measured through the bending test, which makes the test results have certain limitations and cannot fully evaluate the mechanical properties of the glass material. Summary of the invention

[0004] Based on this, the present application provides a workpiece clamping auxiliary device to solve the problem of difficulty in clamping small-sized workpieces in the prior art.

[0005] To achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

[0006] The embodiment of the present application provides a workpiece clamping auxiliary device, comprising a first potting chuck, a second potting chuck, a centering frame, a first retainer, and a second retainer that are separately arranged;

[0007] One end of the first potting chuck is provided with a first clamping groove and a first centering groove;

[0008] The centering frame comprises a mounting portion and a supporting portion which are connected and arranged in a connected manner, wherein the mounting portion is used to be detachably connected to the workpiece, and the supporting portion is used to be inserted into the first centering groove so that one end of the workpiece is located in the first clamping groove;

[0009] The first clamping groove is used to inject adhesive to fix one end of the workpiece to the first potting chuck;

[0010] A second clamping groove is provided at one end of the second potting chuck, and the second clamping groove is used for pouring adhesive to fix the other end of the workpiece to the second potting chuck;

[0011] The first holder and the second holder are used to keep the first potting chuck and the second potting chuck coaxially and form a space for accommodating the workpiece.

[0012] In one embodiment, the first centering groove is arranged around the first clamping groove, and a hollow portion is provided on the support portion, and the hollow portion is used to connect the first clamping groove and the external space of the centering frame.

[0013] In one of the embodiments, a mounting groove is provided on the inner surface of the mounting portion, the diameter of the mounting groove is larger than the diameter of the workpiece, and the mounting groove is used for detachable connection with one end of the workpiece.

[0014] In one embodiment, the second potting clamp is provided with a second centering groove on the periphery of the second clamping groove.

[0015] In one embodiment, the radial dimensions of the openings of the first clamping groove and the second clamping groove are smaller than the radial dimensions of the groove bottoms.

[0016] In one embodiment, the first retainer and the second retainer include an abutment portion and a step portion, respectively; the inner surface of the abutment portion is used to abut against the outer walls of the first potting chuck and the second potting chuck, respectively, so that the first potting chuck and the second potting chuck remain coaxial; the step portion is provided in the middle of the inner surface of the abutment portion, and the step portion is used to be placed between the first potting chuck and the second potting chuck, so that a space for accommodating the workpiece is formed between the first potting chuck and the second potting chuck, and the first potting chuck and the second potting chuck are axially limited.

[0017] In one of the embodiments, the first retainer and the second retainer respectively include a support rod and at least two clamping blocks arranged on the support rod; the first potting chuck and the second potting chuck are respectively provided with clamping grooves on their outer walls, and the clamping blocks are respectively inserted into the corresponding clamping grooves to keep the first potting chuck and the second potting chuck coaxial and form a space for accommodating the workpiece.

[0018] In one embodiment, the workpiece clamping auxiliary device also includes a first clamping head and a second clamping head; the first clamping head includes a first connecting portion and a first clamping portion that are connected together, and the first connecting portion is used to be detachably connected to the first potting chuck; the second clamping head includes a second connecting portion and a second clamping portion that are connected together, and the second connecting portion is used to be detachably connected to the second potting chuck.

[0019] In one embodiment, the first connection portion is threadedly connected to the first potting chuck, and the second connection portion is threadedly connected to the second potting chuck.

[0020] In one embodiment, the first clamping portion and the second clamping portion are respectively plate-shaped, and fixing holes are respectively formed on the first clamping portion and the second clamping portion.

[0021] The present application has at least the following beneficial effects: the workpiece clamping auxiliary device provided in the embodiment of the present application fixes the two ends of the workpiece respectively through the first potting chuck and the second potting chuck, thereby increasing the clamping size of the workpiece and making it easier to clamp the workpiece. The workpiece is located at the center of the first clamping groove through the centering frame and the centering groove, and is located at the center of the second clamping groove through the first retainer and the second retainer, so that the workpiece is kept coaxial with the first potting chuck and the second potting chuck respectively, avoiding the inclination of the workpiece affecting the force state of the workpiece after clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a workpiece clamping auxiliary device according to an embodiment of the present application.

[0023] Figure 2 This is a schematic diagram of the exploded structure of the workpiece clamping auxiliary device according to an embodiment of the present application.

[0024] Figure 3 It is a partial cross-sectional structural schematic diagram of a workpiece clamping auxiliary device according to an embodiment of the present application.

[0025] Figure 4 It is a schematic structural diagram of the first potting chuck (second potting chuck) of an embodiment of the present application.

[0026] Figure 5 This is a schematic diagram of the structure of the centering frame according to an embodiment of the present application.

[0027] Figure 6 It is a schematic diagram of the installation structure of the first retainer and the first potting chuck and the second potting chuck according to an embodiment of the present application.

[0028] Figure 7 This is a schematic diagram of the usage status structure of the centering frame according to an embodiment of the present application.

[0029] The meanings of the symbols in the accompanying drawings are as follows:

[0030] 1. first clamping head; 11. first connecting portion; 12. first clamping portion; 121. fixing hole;

[0031] 2. second clamping head; 21. second connecting portion; 22. second clamping portion;

[0032] 3. First potting chuck; 31. First centering groove; 32. First clamping groove; 33. Clamping groove;

[0033] 4. second potting chuck; 41. second centering groove; 42. second clamping groove;

[0034] 5. first retainer; 51. support rod; 52. clamping block;

[0035] 6. second retainer; 61. abutment portion; 62. step portion;

[0036] 7. Workpiece;

[0037] 8. Centering frame; 81. Mounting portion; 811. Mounting groove; 82. Support portion; 821. Hollow portion;

[0038] 9. Adhesive. DETAILED DESCRIPTION

[0039] The technical solution of the present application is further elaborated in detail below in conjunction with the accompanying drawings and specific embodiments of the specification.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit the implementation of this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0041] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating positions or positional relationships, are based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] See also Figures 1 to 3 The workpiece clamping auxiliary device of the embodiment of the present application includes a first potting chuck 3, a second potting chuck 4, a centering frame 8, a first retainer 5 and a second retainer 6 which are separately arranged.

[0044] like Figure 4As shown, one end of the first potting chuck 3 is provided with a first clamping groove 32 and a first centering groove 31. In this embodiment, the first potting chuck 3 is cylindrical as a whole, and a concave first clamping groove 32 is provided on the surface of one end of the first potting chuck 3, and an annular centering groove is provided on the periphery of the first clamping groove 32.

[0045] like Figure 5 As shown, the centering frame 8 includes a mounting portion 81 and a supporting portion 82 that are connected and arranged, the mounting portion 81 is used to be detachably connected to the workpiece 7, and the supporting portion 82 is used to be inserted into the first centering groove 31. The centering groove and the supporting portion 82 are adapted in size and are clearance-matched so that one end of the workpiece 7 is located in the first clamping groove 32. The centering frame 8 in this embodiment has a mounting portion 81 in the shape of a circular plate, and a concave mounting groove 811 is provided on the inner side surface of the mounting portion 81. The diameter of the mounting groove 811 can be slightly larger than the outer diameter of the workpiece 7. The mounting groove 811 forms a clearance fit with the workpiece 7 in the radial direction, which is convenient for the installation of the workpiece 7. For example, the workpiece 7 can be attached to the mounting groove 811 by double-sided tape, which is convenient for the disassembly and assembly of the workpiece 7 and the centering frame 8. The supporting parts 82 are connected to the circumferential edges of the mounting part 81, respectively. The supporting parts 82 are cylindrical, and the supporting parts 82 and the mounting part 81 are arranged vertically. A hollow part 821 is provided on the side wall of the supporting part 82, and the hollow part 821 is used to connect the first clamping groove 32 with the external space of the centering frame 8. The number of the hollow parts 821 can be one or more, and the provision of the hollow parts 821 can facilitate the injection of the adhesive 9 into the first clamping groove 32. The hollow part 821 of this embodiment extends from the end of the supporting part 82 to the mounting part 81.

[0046] like Figure 2 and Figure 3 As shown, the first clamping groove 32 is used to pour the adhesive 9 to fix one end of the workpiece 7 to the first potting chuck 3. The radial dimension of the notch of the first clamping groove 32 is smaller than the radial dimension of the groove bottom. For example, a certain taper can be set near one end of the notch to form a trumpet structure with a larger inner part and a smaller outer part for the first clamping groove 32. This design can prevent the adhesive 9 in the first clamping groove 32 from detaching when subjected to tension, thereby ensuring the reliability of clamping.

[0047] like Figure 4As shown, a second clamping groove 42 is provided at one end of the second potting chuck 4, and the second clamping groove 42 is used to pour adhesive 9 to fix the other end of the workpiece 7 to the second potting chuck 4. In this embodiment, the structure of the second potting chuck 4 is the same as that of the first potting chuck 3, and a second centering groove 41 is provided on the periphery of the second clamping groove 42. Designing the first potting chuck 3 and the second potting chuck 4 to have the same structure can be convenient for use. When in use, the first potting chuck 3 and the second potting chuck 4 do not need to be distinguished and can be used at will. That is, the second potting chuck 4 can be used interchangeably with the first potting chuck 3. When the second potting chuck 4 is used as the first potting chuck 3, the support portion 82 of the centering frame 8 can be inserted into the second centering groove 41. The structure of the second clamping groove 42 is the same as that of the first clamping groove 32, and will not be repeated.

[0048] like Figure 1 , Figure 2 and Figure 6 As shown, the first holder 5 and the second holder 6 are used to keep the first potting chuck 3 and the second potting chuck 4 coaxial and form a space for accommodating the workpiece 7 .

[0049] like Figure 1 and Figure 2 As shown, in this embodiment, the first retainer 5 and the second retainer 6 have the same structure, and respectively include an abutment portion 61 and a step portion 62. The abutment portion 61 is an arc-shaped plate-like structure, and the inner diameter of the abutment portion 61 is consistent with the outer diameter of the first potting chuck 3 and the second potting chuck 4. The step portion 62 is provided in the middle of the inner surface of the abutment portion 61. When in use, the step portion 62 is placed between the first potting chuck 3 and the second potting chuck 4, so that the first potting chuck 3 and the second potting chuck 4 maintain a certain distance, forming a space for accommodating the workpiece 7.

[0050] like Figure 6 As shown, in other embodiments, the first retainer 5 and the second retainer 6 may also be other structures, for example, the first retainer 5 and the second retainer 6 have the same structure, and each includes a support rod 51 and at least two clamping blocks 52 arranged on the support rod 51. The outer walls of the first potting chuck 3 and the second potting chuck 4 are respectively provided with clamping grooves 33, and the clamping grooves 33 are used to insert the clamping blocks 52. The inner surface of the support rod 51 can be set to an arc-shaped surface that matches the outer diameter of the first potting chuck 3 and the second potting chuck 4. A block 52 on the support rod 51 is inserted into the slot 33 of the first potting chuck 3, and the other block 52 is inserted into the slot 33 of the second potting chuck 4. The support rods 51 of the two retainers (the first retainer 5 and the second retainer 6) are respectively abutted against the first potting chuck 3 and the second potting chuck 4, so that the first potting chuck 3 and the second potting chuck 4 remain coaxial, and form a space for accommodating the workpiece 7, and axially limit the first potting chuck 3 and the second potting chuck 4.

[0051] like Figure 1 and Figure 2 As shown, in order to further improve the clamping convenience of the workpiece clamping auxiliary device, a first clamping head 1 and a second clamping head 2 can also be provided. In this embodiment, the first clamping head 1 and the second clamping head 2 are also arranged in the same structure and can be used interchangeably. The first clamping head 1 includes a first connecting portion 11 and a first clamping portion 12 connected and arranged, and the first connecting portion 11 is used to be detachably connected to the first potting chuck 3; the second clamping head 2 includes a second connecting portion 21 and a second clamping portion 22 connected and arranged, and the second connecting portion 21 is used to be detachably connected to the second potting chuck 4. The first connecting portion 11 and the second connecting portion 21 are cylindrical structures, respectively, and concave threaded holes are respectively provided on the end faces of the two connecting portions (the first connecting portion 11 and the second connecting portion 21), and the first potting chuck 3 and the second potting chuck 4 are respectively provided with external threads at one end away from the clamping groove (the first clamping groove 32 and the second clamping groove 42), and the first potting chuck 3 is threadedly connected to the threaded hole of the first connecting portion 11, and the second potting chuck 4 is threadedly connected to the threaded hole of the second connecting portion 21. The first clamping part 12 and the second clamping part 22 are respectively plate-shaped, and fixing holes 121 are respectively provided on the first clamping part 12 and the second clamping part 22. The plate-shaped clamping part (the first clamping part 12 and the second clamping part 22) structure can be easily clamped, and the fixing holes 121 penetrating through the clamping part can be easily adapted to the universal testing machine, so that the traditional universal testing machine can fix and clamp the workpiece clamping auxiliary device through the round rod-shaped pin.

[0052] The method of using the workpiece clamping auxiliary device of the embodiment of the present application is as follows: Figure 7As shown, one end of the workpiece 7 is pasted in the mounting groove 811 of the centering frame 8 by double-sided tape. Then the support portion 82 of the centering frame 8 is inserted into the centering groove of the first potting chuck 3, so that the workpiece 7 is suspended in the first clamping groove 32. At this time, the adhesive 9 is poured into the first clamping groove 32. The adhesive 9 can be, for example, a potting resin. After the adhesive 9 is cured, the centering frame 8 connected to the workpiece 7 is removed. An appropriate amount of adhesive 9 is poured into the second clamping groove 42 so that the end of the workpiece 7 is immersed in the adhesive 9. The end of the workpiece 7 connected to the centering frame 8 is inserted into the second clamping groove 42. Then the step portion 62 of the first retainer 5 and the second retainer 6 (only the embodiment with this structure is described) is placed between the first potting chuck 3 and the second potting chuck 4, and the two retainers are closed so that the abutment portion 61 abuts against the outer walls of the first potting chuck 3 and the second potting chuck 4 to ensure the longitudinal coaxiality of the two potting chucks. After the adhesive 9 in the second clamping groove 42 is cured, the workpiece 7 is firmly fixed by the two potting chucks. At this time, the two retainers can be removed, and the first potting chuck 3 and the first clamping head 1 are fixedly connected, and the second potting chuck 4 and the second clamping head 2 are fixedly connected to complete the installation and fixation of the workpiece 7. If a tensile test is required for the workpiece 7, the workpiece 7 can be clamped on the universal testing machine by inserting two round bar-shaped pins into the fixing holes 121 of the two clamping heads respectively.

[0053] The workpiece clamping auxiliary device of the embodiment of the present application can expand the radial dimension of the workpiece into a dimension suitable for clamping, such as a clamping dimension compatible with a universal testing machine. It can be used as an auxiliary clamping tool for small-sized specimens, such as an auxiliary clamping tool for tensile tests of thin glass specimens. By appropriately increasing the radial dimension of the clamping groove notch, workpiece clamping of various specifications can be met. For the workpiece to be clamped, there is no need to limit the cross-sectional size and shape of the workpiece. After the clamping work is completed, the corresponding debonding agent (such as a resin debonding agent) or high-temperature heating and other measures can be used to remove the adhesive to achieve the reuse of the workpiece clamping auxiliary device.

[0054] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0055] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A workpiece clamping auxiliary device, characterized in that: It comprises a first potting chuck (3), a second potting chuck (4), a centering frame (8), a first retainer (5) and a second retainer (6) which are separately arranged; One end of the first potting clamp (3) is provided with a first clamping groove (32) and a first centering groove (31); The centering frame (8) comprises a mounting portion (81) and a supporting portion (82) which are connected to each other, wherein the mounting portion (81) is used for being detachably connected to the workpiece (7), and the supporting portion (82) is used for being inserted into the first centering groove (31) so that one end of the workpiece (7) is located in the first clamping groove (32); The first clamping groove (32) is used to inject adhesive (9) to fix one end of the workpiece (7) to the first potting chuck (3); A second clamping groove (42) is provided at one end of the second potting chuck (4), and the second clamping groove (42) is used for injecting adhesive (9) to fix the other end of the workpiece (7) to the second potting chuck (4); the first retainer (5) and the second retainer (6) are used to keep the first potting chuck (3) and the second potting chuck (4) coaxial and form a space for accommodating the workpiece (7).

2. The workpiece clamping auxiliary device according to claim 1, characterized in that: The first centering groove (31) is arranged around the first clamping groove (32), and a hollow portion (821) is provided on the support portion (82), and the hollow portion (821) is used to connect the first clamping groove (32) and the external space of the centering frame (8).

3. The workpiece clamping auxiliary device according to claim 1, characterized in that: The inner surface of the mounting portion (81) is provided with a mounting groove (811), the diameter of the mounting groove (811) is larger than the diameter of the workpiece (7), and the mounting groove (811) is used to be detachably connected to one end of the workpiece (7).

4. The workpiece clamping auxiliary device according to claim 1, characterized in that: The second potting clamp (4) is provided with a second centering groove (41) on the periphery of the second clamping groove (42).

5. The workpiece clamping auxiliary device according to claim 1, characterized in that: The radial dimensions of the slot openings of the first clamping slot (32) and the second clamping slot (42) are smaller than the radial dimensions of the slot bottoms.

6. The workpiece clamping auxiliary device according to claim 1, characterized in that: The first retainer (5) and the second retainer (6) respectively comprise an abutting portion (61) and a step portion (62); the inner surface of the abutting portion (61) is used to abut against the outer walls of the first potting chuck (3) and the second potting chuck (4) respectively, so that the first potting chuck (3) and the second potting chuck (4) remain coaxial; the step portion (62) is arranged in the middle of the inner surface of the abutting portion (61), and the step portion (62) is used to be placed between the first potting chuck (3) and the second potting chuck (4), so that a space for accommodating the workpiece (7) is formed between the first potting chuck (3) and the second potting chuck (4), and the first potting chuck (3) and the second potting chuck (4) are axially limited.

7. The workpiece clamping auxiliary device according to claim 1, characterized in that: The first retainer (5) and the second retainer (6) respectively comprise a support rod (51) and at least two clamping blocks (52) arranged on the support rod (51); the first potting chuck (3) and the second potting chuck (4) are respectively provided with clamping grooves (33) on their outer walls, and the clamping blocks (52) are respectively inserted into the corresponding clamping grooves (33) so that the first potting chuck (3) and the second potting chuck (4) remain coaxial and form a space for accommodating the workpiece (7).

8. The workpiece clamping auxiliary device according to claim 1, characterized in that: The invention also comprises a first clamping head (1) and a second clamping head (2); the first clamping head (1) comprises a first connecting portion (11) and a first clamping portion (12) which are connected to each other, and the first connecting portion (11) is used to be detachably connected to the first potting clamp (3); the second clamping head (2) comprises a second connecting portion (21) and a second clamping portion (22) which are connected to each other, and the second connecting portion (21) is used to be detachably connected to the second potting clamp (4).

9. The workpiece clamping auxiliary device according to claim 8, characterized in that: The first connection portion (11) is threadedly connected to the first potting chuck (3), and the second connection portion (21) is threadedly connected to the second potting chuck (4).

10. The workpiece clamping auxiliary device according to claim 8, characterized in that: The first clamping portion (12) and the second clamping portion (22) are respectively plate-shaped, and the first clamping portion (12) and the second clamping portion (22) are respectively provided with fixing holes (121).

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