Electrode cap clamp

Abstract

The utility model relates to an electrode cap clamp which comprises a hollow cylinder body, the cylinder body sequentially comprises a mounting part, an elastic part and a clamping part, a plurality of deformation joints are arranged on the peripheries of the elastic part and the clamping part in the generatrix direction of the cylinder body, the clamping part is divided into a plurality of clamping pieces by the deformation joints, and the clamping pieces are arranged in a circumferential mode. A first clamping hole for clamping an electrode cap is defined by the plurality of clamping pieces; the mounting part is used for being connected with a driving part, the outer diameter of the elastic part is the same as that of the mounting part, the outer diameter of the clamping part increases gradually in the direction away from the mounting part, and the clamping part shrinks inwards under external force to clamp the electrode cap. In the invention, the periphery of the clamping part is subjected to external force towards the electrode cap; when the electrode cap is welded, the elastic part deforms, and the clamping part shrinks inwards to deform, so that the plurality of clamping pieces tightly abut against the electrode cap, at the moment, a large contact area is formed between the electrode cap and the clamp, the deformation quantity of the electrode cap can be reduced, and the yield of welded workpieces is improved.

Description

Technical Field

[0001] The present application relates to the technical field of metal processing, and in particular to an electrode cap fixture. Background Art

[0002] The electrode cap is an accessory used for welding. During the welding process, the electrode cap and the electrode connect two or more metal parts together. The material of the electrode cap is usually chromium zirconium copper, and sometimes dispersed copper is also used, so that it can be repaired or replaced after a certain number of welding times (usually 1000-1200 points).

[0003] In the prior art, a three-jaw chuck fixture is often used to fix the electrode cap position to facilitate the welding of metal parts. However, during a long processing period, the point where the electrode cap contacts the fixture will deform, which will have an adverse effect on the welding quality and production efficiency.

[0004] The main reason for the deformation of the contact point between the electrode cap and the fixture is due to the combined effect of thermal stress and mechanical stress. Thermal stress comes from the heat input during the processing, especially during welding, high temperature will cause thermal expansion of the material, while mechanical stress comes from the fixing force of the fixture on the workpiece. Under long-term action, the plastic deformation of the material accumulates and eventually leads to deformation.

[0005] The deformation of the contact point between the electrode cap and the fixture will directly affect the processing accuracy. In welding applications, the deformation of the electrode cap will cause uneven distribution of welding current, affecting the welding quality, such as uneven welding points and reduced weld strength. In other metal processing processes, deformation will also cause deviations in the size and shape of the workpiece, reducing the qualified rate of the finished product. Utility Model Content

[0006] In order to reduce the deformation of the electrode cap during the welding process and improve the yield rate of the welded workpiece, the present application provides an electrode cap clamp.

[0007] The present application provides an electrode cap fixture, which adopts the following technical solution:

[0008] An electrode cap clamp comprises a hollow cylinder, which comprises a mounting portion, an elastic portion and a clamping portion in sequence, wherein the mounting portion, the elastic portion and the clamping portion are integrally formed; along the generatrix direction of the cylinder, the elastic portion and the clamping portion are provided with a plurality of deformation seams on their outer circumferences, the deformation seams provide telescopic deformation space for the elastic portion and the clamping portion, the deformation seams divide the clamping portion into a plurality of clamping members, the plurality of clamping members are arranged in a circle, and the plurality of clamping members are arranged to form a first clamping hole for clamping the electrode cap; the mounting portion is used to be connected to a driving member, the elastic portion has the same outer diameter as the mounting portion, the outer diameter of the clamping portion increases gradually along the direction away from the mounting portion, and the clamping portion contracts inwards under external force to clamp the electrode cap.

[0009] By adopting the above technical solution, the electrode cap is placed in the first clamping hole, and the outer periphery of the clamping part is subjected to an external force toward the electrode cap; the elastic part is deformed, and the clamping part shrinks and deforms inward, so that a number of clamping parts are in close contact with the electrode cap to achieve the effect of the clamp clamping the electrode cap; at this time, the clamp clamps the electrode cap in a circular manner, so that there is a larger contact area between the electrode cap and the clamp, so that the clamping force of the electrode cap is distributed on the outer circumference of the electrode cap, thereby reducing the deformation of the electrode cap during the workpiece welding process and improving the yield rate of the welded workpiece.

[0010] Optionally, the first clamping hole is a stepped hole.

[0011] By adopting the above technical solution, the first clamping hole in the shape of a stepped hole facilitates the placement and positioning of the electrode cap.

[0012] Optionally, an annular groove is formed on a side of the elastic portion close to the mounting portion.

[0013] By adopting the above technical solution, an annular groove is provided in the connection area between the elastic part and the mounting part, so as to facilitate the deformation of the elastic part and the clamping part.

[0014] Optionally, a through hole is formed through the bottom wall of the annular groove, the through hole is connected to the deformation joint, and the diameter of the through hole is greater than the width of the deformation joint.

[0015] By adopting the above technical solution, a through hole is opened at the end of the deformation joint to reduce the stress concentration of the elastic member around the deformation joint.

[0016] Optionally, the clamp also includes a hollow clamping portion and a fastening bolt; the clamping portion is inserted into the first clamping hole, and the outer periphery of the clamping portion is in contact with the inner periphery of the clamping portion; the clamping portion includes a plurality of clamping parts, the number of the clamping parts is consistent with that of the clamping part, the clamping part is provided with a mounting hole matching with the fastening bolt, the clamping portion is provided with a mounting groove matching with the fastening bolt, the fastening bolt is used to fix the clamping part and the clamping part, the clamping part is arranged in contact with the clamping portion, a plurality of clamping parts are arranged to form a second clamping hole for clamping the electrode cap, and an avoidance gap is provided between adjacent clamping parts.

[0017] By adopting the above technical solution, when a small-sized electrode cap needs to be replaced, the clamping part can be installed in the first clamping hole; then the electrode cap is inserted into the second clamping hole of the clamping part, and the electrode cap is clamped by using several clamping parts of the clamping part.

[0018] Optionally, a clearance distance is provided between the clamping member and the opening of the first clamping hole.

[0019] By adopting the above technical solution, an avoidance distance is provided between the upper edge of the clamping member and the upper edge of the holding member, thereby reducing the extrusion damage of the clamping member to the upper edge of the holding member.

[0020] Optionally, in the vertical direction, the clamping piece is step-shaped, and the clamping piece includes a first component and a second component, the first component and the second component are integrally formed, and the outer diameter of the first component is larger than the outer diameter of the second component; the first component is provided with the installation groove, the first component is abutted against the clamping piece, an avoidance distance is provided between the first component and the opening of the first clamping hole, an avoidance distance is provided between the second component and the clamping piece, and the second component protrudes from the clamping portion.

[0021] By adopting the above technical solution, the clamping member is configured as a stepped first component and a second component, which can increase the contact area between the clamping member and the electrode cap, improve the clamping effect of the clamping part on the electrode cap, and further reduce the deformation of the electrode cap.

[0022] Optionally, a plurality of anti-slip grooves are formed on the inner peripheral wall of the clamping member, and the length direction of the anti-slip grooves is arranged perpendicular to the virtual central axis of the clamp.

[0023] By adopting the above technical solution, the anti-slip groove is provided on the inner peripheral wall of the clamping piece, thereby increasing the friction between the electrode cap and the clamping piece, thereby improving the clamping effect of the clamping part on the electrode cap.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. The electrode cap is placed in the first clamping hole. After the outer periphery of the clamping part is subjected to an external force toward the electrode cap, the elastic part is deformed, and the clamping part is deformed and retracted inward, so that a plurality of clamping parts are closely in contact with the electrode cap, so as to achieve the effect of clamping the electrode cap; at this time, there is a large contact area between the electrode cap and the clamp, so that during the workpiece welding process, the deformation of the electrode cap can be reduced, and the yield rate of the welded workpiece can be improved;

[0026] 2. Through holes are opened at the ends of the deformation joints to reduce the stress generated by the elastic parts around the deformation joints; thereby reducing the occurrence of stress concentration and increasing the practical life of the clamps;

[0027] 3. When a small-sized electrode cap needs to be replaced, the clamping part can be installed in the first clamping hole; then the electrode cap is inserted into the second clamping hole of the clamping part, and the electrode cap is clamped by using several clamping parts of the clamping part to provide a range of use for the clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the electrode cap fixture structure in Example 1.

[0029] Figure 2 4 is a cross-sectional view of the electrode cap fixture structure in Example 1.

[0030] Figure 3 Schematic diagram of the electrode cap fixture structure in Example 2.

[0031] Figure 4 It is a cross-sectional view of the electrode cap clamp structure in Example 2.

[0032] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0033] Figure 6 It is an exploded view showing the connection relationship between the clamping member and the clamping member in Example 2.

[0034] Explanation of the accompanying drawings: 1. cylinder; 2. mounting portion; 3. elastic portion; 31. annular groove; 32. through hole; 4. clamping portion; 41. clamping piece; 411. mounting hole; 42. first clamping hole; 5. deformation joint; 6. fastening bolt; 7. clamping portion; 71. second clamping hole; 72. clamping piece; 721. first component; 7211. mounting groove; 722. second component; 73. anti-slip groove. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-6 This application is described in further detail.

[0036] The present application embodiment discloses an electrode cap fixture. Figure 1 and Figure 2 The electrode cap fixture comprises a hollow cylinder 1, which comprises a mounting portion 2, an elastic portion 3 and a clamping portion 4 in sequence, and the mounting portion 2, the elastic portion 3 and the clamping portion 4 are integrally formed.

[0037] Reference Figure 1 and Figure 2 Along the generatrix direction of the cylinder 1, the outer circumference of the elastic part 3 and the clamping part 4 is provided with a plurality of deformation seams 5, the deformation seams 5 provide a telescopic deformation space for the elastic part 3 and the clamping part 4, the deformation seams 5 divide the clamping part 4 into a plurality of clamping members 41, the plurality of clamping members 41 are arranged in a circle, and the plurality of clamping members 41 are arranged to form a first clamping hole 42 for clamping the electrode cap. In this embodiment, there are four clamping members 41 and four deformation seams 5; and the first clamping hole 42 is a stepped hole to facilitate the positioning and placement of the electrode cap.

[0038] Reference Figure 1 and Figure 2, an annular groove 31 is provided on the side of the elastic part 3 close to the mounting part 2. This facilitates the inward deformation of the elastic part 3 and the clamping part 4. At the same time, a through hole 32 is provided through the bottom wall of the annular groove 31, which is connected to the deformation seam 5, and the diameter of the through hole 32 is greater than the width of the deformation seam 5; thus, when the elastic part is deformed, the stress generated by the elastic part around the deformation seam 5 can be reduced; thus, the occurrence of stress concentration is reduced, and the practical life of the clamp is increased.

[0039] Reference Figure 1 and Figure 2 The mounting portion 2 is used to connect with the driving part on the machine tool. The elastic portion 3 has the same outer diameter as the mounting portion 2. The outer diameter of the clamping portion 4 increases gradually in the direction away from the mounting portion 2, that is, a conical surface is provided on the outer periphery of the clamping portion 4. When an external force acts on the conical surface of the clamping portion 4, the clamping portion 4 contracts inwardly due to the external force to clamp the electrode cap.

[0040] The implementation principle of an electrode cap fixture in the embodiment of the present application is:

[0041] Reference Figure 1 and Figure 2 , the electrode cap is placed in the first clamping hole 42, and the outer periphery of the clamping part 4 is subjected to an external force toward the electrode cap (for example, a fixing ring sleeved on the outer periphery of the elastic member applies a force toward the electrode cap to the conical surface of the outer periphery of the clamping part 4); the elastic part 3 is deformed, and the clamping part 4 is deformed and retracted inward, so that a plurality of clamping parts 41 are in close contact with the electrode cap to achieve the effect of clamping the electrode cap with the clamp; at this time, there is a large contact area between the electrode cap and the clamp, so that during the workpiece welding process, the deformation of the electrode cap can be reduced, thereby improving the yield rate of the welded workpiece.

[0042] Example 2

[0043] The difference between this embodiment 2 and embodiment 1 is that:

[0044] Reference Figure 3 and Figure 4 The electrode cap fixture also includes a hollow clamping portion 7 and a fastening bolt 6. The clamping portion 7 is inserted into the first clamping hole 42, and the outer periphery of the clamping portion 7 is in contact with the inner periphery of the clamping portion 4; the fastening bolt 6 is used to connect the clamping portion 4 and the tie portion.

[0045] Reference Figure 3 and Figure 4 The clamping portion 4 includes a plurality of clamping members 72, and the number of the clamping members 72 is consistent with that of the clamping members 41. In the present embodiment, there are four clamping members 72 and four clamping members 41, and the four clamping members 72 are arranged in a ring. The four clamping members 72 are arranged to form a second clamping hole 71 for clamping the electrode cap, and the second clamping hole 71 is also a step hole. An avoidance gap is provided between adjacent clamping members 72 to allow the clamping members 72 to be deformed inwardly.

[0046] Reference Figure 4 and Figure 5 In the vertical direction, the clamping member 72 is stepped. The clamping member 72 includes a first component 721 and a second component 722. The first component 721 and the second component 722 are integrally formed. The outer diameter of the first component 721 is larger than the outer diameter of the second component 722. The first component 721 is provided with a mounting groove 7211. The first component 721 abuts against the clamping member 41. A clearance distance is provided between the first component 721 and the opening of the first clamping hole 42. At the same time, a part of the second component 722 is arranged in the first clamping hole 42, and the other part of the second component 722 protrudes from the clamping portion 4, and a clearance distance is provided between the second component 722 and the clamping member 41.

[0047] Reference Figure 3 and Figure 6 In addition, the first component 721 is provided with a mounting hole 411 that matches the fastening bolt 6, and the clamping portion 7 is provided with a mounting groove 7211 that matches the fastening bolt 6; in this embodiment, the side walls of the mounting hole 411 and the mounting groove 7211 are both inner spiral-shaped, so that the fastening bolt 6 can fix the clamping member 72 and the clamping member 41, and the clamping member 72 is arranged in contact with the clamping portion 4.

[0048] Reference Figures 3 to 6 When a small-sized electrode cap needs to be replaced, the clamping part 7 can be installed in the first clamping hole 42; then the electrode cap is inserted into the second clamping hole 71 of the clamping part 7, and the electrode cap is clamped by using several clamping parts 72 of the clamping part 7 to provide a range of use for the clamp.

[0049] Reference Figures 3 to 6 , and the clamping member 72 is arranged into a stepped first part 721 and a second part 722; on the one hand, an avoidance distance can be provided between the clamping member 72 and the upper edge of the clamping member 41 to reduce the squeezing and damage of the clamping member 41 by the clamping member 72; on the other hand, the contact area between the clamping member 72 and the electrode cap can be increased to improve the clamping effect of the clamping part 7 on the electrode cap and further reduce the deformation of the electrode cap.

[0050] Reference Figure 4 In addition, in this embodiment, the inner wall of the clamping member 72 is provided with a plurality of anti-slip grooves 73, and the length direction of the anti-slip grooves 73 is arranged perpendicular to the virtual center axis of the clamp; thereby, the friction between the electrode cap and the clamping member 72 is increased through the anti-slip grooves 73, so as to improve the clamping effect of the clamping portion 4 on the electrode cap.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electrode cap fixture, characterized in that: The invention comprises a hollow cylinder (1), wherein the cylinder (1) comprises a mounting portion (2), an elastic portion (3) and a clamping portion (4) in sequence, wherein the mounting portion (2), the elastic portion (3) and the clamping portion (4) are integrally formed; along the generatrix direction of the cylinder (1), a plurality of deformation seams (5) are provided on the outer periphery of the elastic portion (3) and the clamping portion (4), wherein the deformation seams (5) provide a telescopic deformation space for the elastic portion (3) and the clamping portion (4), and the deformation seams (5) are The clamping portion (4) is divided into a plurality of clamping parts (41), the plurality of clamping parts (41) are arranged in a circle, and the plurality of clamping parts (41) are arranged to surround a first clamping hole (42) for clamping an electrode cap; the mounting portion (2) is used to connect with a driving member, the elastic portion (3) has the same outer diameter as the mounting portion (2), and the outer diameter of the clamping portion (4) increases gradually in a direction away from the mounting portion (2); the clamping portion (4) contracts inwardly when subjected to an external force to clamp the electrode cap.

2. The electrode cap fixture according to claim 1, characterized in that: The first clamping hole (42) is a stepped hole.

3. The electrode cap fixture according to claim 1, characterized in that: A ring groove (31) is formed on a side of the elastic portion (3) close to the mounting portion (2).

4. The electrode cap fixture according to claim 3, characterized in that: A through hole (32) is formed through the bottom wall of the annular groove (31), the through hole (32) is connected to the deformation joint (5), and the diameter of the through hole (32) is greater than the width of the deformation joint (5).

5. The electrode cap fixture according to claim 1, characterized in that: The clamp further comprises a hollow clamping portion (7) and a fastening bolt (6); the clamping portion (7) is inserted into the first clamping hole (42), and the outer circumference of the clamping portion (7) is in contact with the inner circumference of the clamping portion (4); the clamping portion (4) comprises a plurality of clamping parts (72), the number of the clamping parts (72) is the same as that of the clamping part (41), the clamping part (41) is provided with a mounting hole (411) matching with the fastening bolt (6), the clamping portion (7) is provided with a mounting groove (7211) matching with the fastening bolt (6), the fastening bolt (6) is used to fix the clamping part (72) and the clamping part (41), the clamping part (72) is arranged in contact with the clamping portion (4), a plurality of clamping parts (72) are arranged to surround a second clamping hole (71) for clamping an electrode cap, and an avoidance gap is provided between adjacent clamping parts (72).

6. The electrode cap fixture according to claim 5, characterized in that: A clearance distance is provided between the clamping piece (72) and the opening of the first clamping hole (42).

7. The electrode cap fixture according to claim 6, characterized in that: In the vertical direction, the clamping member (72) is step-shaped. The clamping member (72) comprises a first component (721) and a second component (722). The first component (721) and the second component (722) are integrally formed. The outer diameter of the first component (721) is larger than the outer diameter of the second component (722). The first component (721) is provided with the mounting groove (7211). The first component (721) is in contact with the clamping member (41). An avoidance distance is provided between the first component (721) and the opening of the first clamping hole (42). An avoidance distance is provided between the second component (722) and the clamping member (41). The second component (722) is arranged to protrude from the clamping portion (4).

8. The electrode cap fixture according to claim 5, characterized in that: The inner peripheral wall of the clamping piece (72) is provided with a plurality of anti-slip grooves (73), and the length direction of the anti-slip grooves (73) is arranged perpendicular to the virtual central axis of the clamp.

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