Workpiece spot welding machining fixing device

Abstract

The utility model belongs to the technical field of spot welding equipment clamping tools, and discloses a workpiece spot welding machining fixing device which comprises a supporting component and a rotating component used for being connected with a rotating driving device, the rotating component is connected with the supporting component through an elastic supporting piece, and the rotating component is provided with at least one positioning groove in the circumferential direction. The supporting component is provided with a positioning part movably embedded in the positioning groove, and the positioning part and the positioning groove form a limiting relation in the circumferential direction. The supporting component is further provided with a limiting part extending in the first direction parallel to the axial direction, and the limiting part and a step-shaped part arranged on the rotating component form a limiting relation in the first direction. According to the welding device, the supporting component can be prevented from rotating along with the rotating component, the welding accuracy is improved, the supporting component can be prevented from being taken down together due to the limiting of the limiting part and the step-shaped part even if the supporting component and the workpiece are adsorbed together due to current when the workpiece is taken, and the usability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of spot welding equipment clamping tooling, and in particular relates to a workpiece spot welding processing fixing device. Background Art

[0002] The automatic spot welding machine is an automated processing equipment specially used for the welding process of parts. The automatic spot welding machine solves the problem of non-standard welding parts and small welding volume. It is an automated equipment with uniform welding formation, accurate positioning, accurate welding delay, and continuous operation. The equipment uses welding electrodes that can be raised and lowered to weld two annular workpieces placed on a rotating support mold that is connected to a rotating mold. The two workpieces are Figure 1 As shown, the annular workpiece with a smaller diameter is the first workpiece 2, and the annular workpiece with a larger diameter is the second workpiece 1. The first workpiece 2 needs to be placed in the top groove of the second workpiece and fixed by circumferential four-point welding.

[0003] Generally, in order to fix the workpiece for spot welding, a spring placement slot is set in the rotating mold, and a spring matching shaft is set at the bottom of the supporting mold to make the two fit tightly. However, in actual use, it is found that the supporting mold for placing the workpiece is easily taken out together with the workpiece due to the existence of current when the workpiece is taken out, and the supporting mold is easily driven to rotate during the spot welding process. In order to ensure the accuracy and standardization of spot welding, manual fixation is still required during the spot welding process. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a workpiece spot welding processing fixing device to solve the problem that the existing supporting mold is easy to be removed together with the workpiece when taking the workpiece and is easy to rotate with the rotating mold.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A workpiece spot welding processing fixing device includes a supporting member and a rotating member for connecting to a rotating drive device, wherein the rotating member is connected to the supporting member through an elastic supporting member, and the rotating member is provided with at least one positioning groove along the circumferential direction, and the supporting member is provided with a positioning portion movably embedded in the positioning groove, and the positioning portion forms a limiting relationship with the positioning groove in the circumferential direction; the supporting member is also provided with a limiting portion extending along a first direction parallel to the axial direction, and the limiting portion and a stepped portion arranged on the rotating member form a limiting relationship in the first direction.

[0007] In a possible implementation, the rotating member is provided with an axial cavity with an open top, the axial cavity is connected to the positioning groove, the supporting member is provided with a positioning column coaxial with the axial cavity and extending into the axial cavity, and the elastic support is connected between the positioning column and the axial cavity.

[0008] In a possible implementation, the limiting portion is an L-shaped structure, and the positioning portion is integrally connected to one end of the limiting portion close to the supporting member.

[0009] In a possible implementation, a first connection portion is provided at one end of the rotating member facing away from the supporting member, and a diameter of the first connection portion is smaller than a diameter of the rotating member to form the stepped portion.

[0010] In a possible implementation, the first connecting portion is provided with a shaft connecting hole for connecting a driving shaft of a rotary driving device.

[0011] In a possible implementation, a fixing member for pressing the workpiece onto the supporting member is further included.

[0012] In a possible implementation, the fixing component is provided with at least two positioning connection parts and at least two spot welding avoidance positions which are staggeredly distributed along the circumferential direction, wherein the positioning connection parts are used to be embedded and matched with the matching parts on the workpiece.

[0013] In a possible implementation, a positioning shaft extending axially is provided at the top center of the supporting member, and the fixing member is provided with a central connecting hole and is connected to the positioning shaft through the central connecting hole.

[0014] In a possible implementation, a central groove is provided at the top of the supporting member, and a second connecting portion extending in the axial direction is provided at the bottom of the fixing member, and the second connecting portion is embedded and matched with the central groove.

[0015] In a possible implementation, a holding piece is further included, the holding piece is threadedly connected to the positioning shaft, and the holding piece is located above the fixing component.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model discloses a workpiece spot welding processing and fixing device, wherein a supporting member is embedded and connected with a positioning groove on a rotating member through a positioning portion, so that the supporting member can move axially relative to the rotating member while maintaining a limiting relationship in the circumferential direction, thereby preventing the supporting member from rotating with the rotating member, thereby improving the welding accuracy, and the limiting portion of the supporting member can form a movable limiting relationship with the stepped portion of the rotating member, so that when taking the workpiece, even if the supporting member is adsorbed together with the workpiece due to the electric current, the limiting of the limiting portion and the stepped portion can prevent the supporting member from being taken away together, thereby improving the usability.

[0018] Moreover, the workpieces can be pressed by a fixing component, so that slippage is not likely to occur between the first workpiece and the second workpiece and between the workpiece and the supporting mold. The small folded edge structure on the second workpiece can be easily coordinated with the positioning part to better avoid slippage, thereby further improving the accuracy of spot welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the relative positions of a first workpiece and a second workpiece to be welded during welding;

[0020] Figure 2 A stereoscopic view of a workpiece spot welding fixture at a first viewing angle;

[0021] Figure 3 A stereoscopic view of a workpiece spot welding fixture under a second viewing angle;

[0022] Figure 4 An exploded view of a workpiece spot welding fixture;

[0023] Figure 5 A three-dimensional view of a workpiece spot welding fixture when welding a first workpiece and a second workpiece;

[0024] Figure 6 The present invention is a three-dimensional view of a fixing component of a workpiece spot welding fixing device.

[0025] In the figure: 1-second workpiece; 2-first workpiece; 21-small folded edge; 3-fixed component; 31-embedded groove; 32-notched groove; 33-fan-shaped structure; 34-center connecting hole; 35-positioning observation part; 36-connecting part; 4-supporting component; 41-positioning part; 42-limiting part; 43-positioning column; 44-center groove; 5-rotating component; 51-positioning groove; 52-first connecting part; 53-axis connecting hole; 54-axis cavity. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with specific implementation methods.

[0027] Please refer to Figure 1-6As shown, an embodiment of the present application provides a workpiece spot welding processing fixing device, including a support member 4 and a rotating member 5 for connecting a rotating drive device, the rotating member 5 is connected to the support member 4 through an elastic support, and the rotating member 5 is provided with at least one positioning groove 51 along the circumferential direction, the support member 4 is provided with a positioning portion 41 movably embedded in the positioning groove 51, and the positioning portion 41 forms a limiting relationship with the positioning groove 51 in the circumferential direction; the support member 4 is also provided with a limiting portion 42 extending along a first direction parallel to the axial direction, and the limiting portion 42 and the stepped portion arranged on the rotating member 5 form a limiting relationship in the first direction.

[0028] The support member 4 is connected to the rotating member 5 through an elastic support such as a spring, so that a certain buffer can be provided when placing the workpiece or when the welding electrode of the electric welder is spot-welded downward. The positioning groove 51 is arranged at the top of the rotating member 5 and can be arranged in a plurality along the circumferential direction, and the support member 4 is correspondingly provided with the same number of positioning parts 41 as the positioning groove 51 and corresponding to each other. The positioning parts 41 are movably embedded in the positioning groove 51, so that it is convenient to move upward and to disassemble and separate at the same time, but the rotating member 5 and the support member 4 are not relatively rotated, so that the support member 4 can be realized by limiting when the rotating member 5 rotates, so that the accuracy of welding can be improved. At the same time, the limiting part 42 of the support member 4 is extended downward and forms a limiting relationship with the stepped part at the bottom of the rotating member 5, that is, when the limiting part 42 moves upward together with the workpiece due to adsorption, the limiting part of the stepped part can prevent the support member 4 from continuing to move, thereby avoiding the problem that the support member 4 is taken out together with the workpiece due to a large current.

[0029] Through the above technical solution, the support member 4 is embedded and connected with the positioning groove 51 on the rotating member 5 through the positioning portion 41, so that the support member 4 can move axially relative to the rotating member 5 while maintaining a limiting relationship in the circumferential direction, thereby preventing the support member 4 from rotating with the rotating member 5, thereby improving the accuracy of welding, and the limiting portion 42 of the support member 4 can form a movable limiting relationship with the stepped portion of the rotating member 5, so that when taking the workpiece, even if the support member 4 is adsorbed together with the workpiece due to the current, the limiting portion 42 and the stepped portion can prevent the support member 4 from being removed together, thereby improving the usability.

[0030] In one embodiment, the rotating member 5 is provided with an axial cavity 54 with an open top, the axial cavity 54 is connected to the positioning groove 51, the supporting member 4 is provided with a positioning column 43 which is coaxial with the axial cavity 54 and extends into the axial cavity 54, and the elastic support is connected between the positioning column 43 and the axial cavity 54.

[0031] In this way, the support member 4 can not only move relative to the rotating member 5 along the axial direction through the positioning portion 41 and the positioning column 43, but also facilitate the installation of elastic support connections such as springs (not shown in the figure), and the structural design is more reasonable.

[0032] Furthermore, in order to better cooperate with the stepped portion to achieve the limit, the limit portion 42 is an L-shaped structure, and the positioning portion 41 is integrally connected to one end of the limit portion 42 close to the support member 4. In this way, the positioning portion 41 of the L-shaped structure can not only form a limit with the stepped portion in the first direction, but also enable the limit portion 42 to have elastic deformation, that is, by bending one end of the limit portion 42 close to the stepped portion outward, it can be separated from the limit and facilitate disassembly, so that the support member 4 can be detached from the rotating member 5, and the disassembly and assembly are more convenient.

[0033] In the specific implementation process, the end of the rotating member 5 away from the supporting member 4 is provided with a first connecting portion 52, and the diameter of the first connecting portion 52 is smaller than the diameter of the rotating member 5 to form the stepped portion. The first connecting portion 52 can be conveniently connected to the rotating drive device, so that the device as a whole can be rotated for welding, and at the same time, it is convenient to form the stepped portion.

[0034] Specifically, the first connecting portion 52 is provided with a shaft connecting hole 53 for connecting the driving shaft of the rotary drive device. The rotary drive device is preferably a stepper motor, whose output shaft is connected to the shaft connecting hole of the first connecting portion 52 and is fixed by a pin through a pin hole on the side to achieve connection.

[0035] In order to prevent the workpiece from slipping easily during the rotation of the support member 4 , the embodiment of the application further includes a fixing member 3 for pressing the workpiece onto the support member 4 .

[0036] The fixing member 3 is used in conjunction with the supporting member 4 to fix the workpieces by pressing, so that the first workpiece 2 and the second workpiece 1 are not prone to slipping when they rotate with the supporting member 4.

[0037] In a preferred embodiment of the fixing component 3, the fixing component 3 is provided with at least two positioning connection parts and at least two spot welding avoidance positions which are staggeredly distributed along the circumferential direction, wherein the positioning connection parts are used to be embedded and matched with the matching parts on the workpiece.

[0038] Since the upper surface of the second workpiece 1 is distributed in a circumferential array with four upwardly turned small folded edges 21, utilizing the structural characteristics of the small folded edges 21, by providing a positioning connection portion on the fixing member 3 for embedding and mating with the small folded edges 21 on the first workpiece 2 as a mating portion, the fixing member 3 can form a limiting relationship with the first workpiece 2 in the rotation direction, so that the two workpieces and the support member 4 can be more fixed when being pressed.

[0039] On this basis, the positioning connection parts and the spot welding avoidance positions are staggered in the circumferential direction of the fixed component 3, and the positioning connection parts and the spot welding avoidance positions are distributed in a circumferential array in the circumferential direction of the fixed component 3. In this way, the staggered positioning connection parts and the spot welding avoidance positions can be switched to the spot welding avoidance positions for spot welding after rotating an angle, which is conducive to welding at the same angle each time, improving welding efficiency, and also realizing multi-point rotation welding at equal angles.

[0040] For example, the spot welding avoidance position may include a notch groove 32 formed by hollowing out on the fixing member 3, and a fan-shaped structure 33 is formed between the fixing members 3 between two adjacent notch grooves 32, and the positioning connection portion is arranged on the fan-shaped structure 33. The notch groove 32 can provide better avoidance for welding, and of course it can also be a hole-mounted hollow structure, which is not limited. The fan-shaped structure 33 formed is just convenient for setting the positioning connection portion, and the structural design is more reasonable. The positioning connection portion is an embedded groove 31, and the matching portion is a protrusion matching the embedded groove 31, which is a small folding edge 21 structure of a workpiece with a smaller diameter.

[0041] Further, in order to facilitate the pressing of the fixing member 3 on the supporting member 4, a positioning shaft (not shown in the figure) extending in the axial direction is provided at the top center of the supporting member 4, and the fixing member 3 is provided with a central connecting hole 34 and connected to the positioning shaft through the central connecting hole 34. The positioning shaft can facilitate the installation of the fixing member 3, and the fixing member 3 can be pressed by the thread with the positioning shaft or another pressing component 2, without limitation.

[0042] Specifically, it also includes a holding member (not shown in the figure), which is threadedly connected to the positioning shaft and is located above the fixing member. The fixing member 3 can hold the first workpiece 2 and the second workpiece 1 on the supporting member 4 through the holding member. The holding member can be a nut. The positioning shaft can pass through the supporting member and pass into the shaft cavity of the rotating member, so that it can be installed more quickly and accurately through the positioning shaft.

[0043] In order to realize the positioning connection between the fixing member 3 and the supporting member 4 and to facilitate installation, further, a center groove 44 is provided at the top of the supporting member 4, and a second connecting portion 36 extending in the axial direction is provided at the bottom of the fixing member 3, and the second connecting portion 36 is embedded and matched with the center groove 44. The second connecting portion 36 can be connected with the center groove 44 provided on the supporting member 4 to play a positioning role.

[0044] When in use, first install the fixing member 3 on the second workpiece 1, and the second workpiece 1 is located on the first workpiece 2. Since the inner diameter of the first workpiece 2 matches the diameter of the connecting portion 36 of the fixing member 3, the three can be preliminarily connected together. Then, place it on the supporting member 4 and pass it through the positioning shaft. Then, connect the pressing piece for pressing or manually fix it during the first spot welding, and then perform spot welding fixation under multiple rotations of the stepping motor.

[0045] After welding is completed, the holding piece is removed, and the fixing member and the welded first workpiece 2 and the workpiece are removed.

[0046] The above are only preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be regarded as limiting the present invention. The protection scope of the present invention should be based on the scope defined by the claims. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A workpiece spot welding processing fixture, characterized in that: The invention comprises a support member (4) and a rotating member (5) for connecting to a rotating drive device, wherein the rotating member (5) is connected to the support member (4) via an elastic support member, and the rotating member (5) is provided with at least one positioning groove (51) along the circumferential direction, and the support member (4) is provided with a positioning portion (41) movably embedded in the positioning groove (51), and the positioning portion (41) forms a limiting relationship with the positioning groove (51) in the circumferential direction; the support member (4) is also provided with a limiting portion (42) extending along a first direction parallel to the axial direction, and the limiting portion (42) forms a limiting relationship with a stepped portion provided on the rotating member (5) in the first direction.

2. A workpiece spot welding processing fixture as claimed in claim 1, characterized in that: The rotating member (5) is provided with an axial cavity (54) with an open top, the axial cavity (54) is connected to the positioning groove (51), the supporting member (4) is provided with a positioning column (43) coaxial with the axial cavity (54) and extending into the axial cavity (54), and the elastic support member is connected between the positioning column (43) and the axial cavity (54).

3. A workpiece spot welding fixture as claimed in claim 1, characterized in that: The limiting portion (42) is an L-shaped structure, and the positioning portion (41) is integrally connected to an end of the limiting portion (42) close to the supporting member (4).

4. A workpiece spot welding fixture as claimed in claim 1, characterized in that: A first connecting portion (52) is provided at one end of the rotating member (5) away from the supporting member (4); the diameter of the first connecting portion (52) is smaller than the diameter of the rotating member (5) to form the stepped portion.

5. A workpiece spot welding fixture as claimed in claim 4, characterized in that: The first connecting portion (52) is provided with a shaft connecting hole (53) for connecting a driving shaft of a rotary driving device.

6. A workpiece spot welding fixture as described in any one of claims 1 to 5, characterized in that: It also includes a fixing member (3) for pressing the workpiece onto the supporting member (4).

7. A workpiece spot welding fixture as claimed in claim 6, characterized in that: The fixing component (3) is provided with at least two positioning connection parts and at least two spot welding avoidance positions which are staggeredly distributed along the circumferential direction, wherein the positioning connection parts are used for being embedded and matched with the matching parts on the workpiece.

8. A workpiece spot welding fixture as claimed in claim 7, characterized in that: A positioning shaft extending in the axial direction is provided at the top center of the supporting member (4), and the fixing member (3) is provided with a central connecting hole (34) and is connected to the positioning shaft through the central connecting hole (34).

9. A workpiece spot welding fixture as claimed in claim 8, characterized in that: The top of the supporting member (4) is provided with a central groove (44), and the bottom of the fixing member (3) is provided with a second connecting portion (36) extending in the axial direction, and the second connecting portion (36) is embedded and matched with the central groove (44).

10. A workpiece spot welding fixture as claimed in claim 9, characterized in that: It also comprises a pressing piece, which is threadedly connected to the positioning shaft and is located above the fixing component (3).

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