Spot welding equipment

Abstract

The utility model belongs to the technical field of spot welding equipment, and discloses spot welding equipment which comprises a spot welding machine body with two welding positions, welding electrodes corresponding to the welding positions are arranged on the spot welding machine body, and the spot welding machine body comprises workpiece rotating supporting devices arranged on the welding positions. The workpiece rotary supporting device comprises a welding seat, a rotary driving part, a guide connection electrode and a workpiece fixing assembly, the rotary driving part is arranged in a containing cavity of the welding seat, and the guide connection electrode is arranged on the welding seat and is close to the workpiece fixing assembly; and the conducting electrodes of the workpiece rotary supporting devices of the two welding positions are connected through an electric lead, so that a closed current loop is formed by the conducting electrodes and the welding electrodes. Electric welding machining is carried out on two welding positions at the same time, the welding efficiency can be improved, the supporting component can be prevented from rotating along with the rotating component, the welding accuracy is improved, meanwhile, the supporting component can be prevented from being taken down together, and the usability is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of spot welding equipment, and in particular relates to a spot welding equipment. 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, precise positioning, accurate welding delay and continuous operation. The equipment uses the welding electrode that can be raised and lowered to weld two annular workpieces placed on the rotating workpiece fixing component with the cooperation of the conductive electrode below. 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] In the prior art, the electric welding machine has one or two welding positions, and a workpiece fixing assembly is provided at each welding position. In order to fix the workpiece for spot welding, a spring placement slot is provided in the rotating mold of the workpiece fixing assembly, and a shaft matching the spring is provided at the lower part of the supporting mold, so that the two are tightly matched. 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 spot welding device to solve the problem that the supporting mold of the existing spot welding machine with multiple welding positions 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 spot welding device comprises a spot welding machine body having two welding positions, wherein the spot welding machine body is provided with welding electrodes corresponding to each welding position, and comprises a workpiece rotation support device provided at the welding position;

[0007] The workpiece rotation support device comprises a welding seat, a rotation driving component, a conducting electrode and a workpiece fixing assembly, wherein the rotation driving component is arranged in a cavity of the welding seat, and the conducting electrode is arranged on the welding seat and close to the workpiece fixing assembly; the conducting electrodes of the workpiece rotation support devices at two welding positions are connected by a conductive wire to form a closed current loop with the welding electrode;

[0008] The workpiece fixing assembly includes a supporting member and a rotating member connected to a rotating driving device, 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, 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.

[0009] In a possible implementation, one side of the cavity is opened to form a movable opening, and the top of the welding seat is provided with an adjustment groove extending toward the movable opening, the workpiece fixing assembly is inserted into the adjustment opening and connected to the rotating drive component, and the workpiece fixing assembly can move along the adjustment groove to change the distance between the rotating drive device and the conducting electrode.

[0010] In a possible implementation, the cavity matches the rotary drive component, and the movable opening is consistent with the cross-sectional profile of the cavity, so that the rotary drive component can enter and exit the movable opening relative to the welding seat.

[0011] In a possible implementation, the rotating member is provided with an axial cavity with an open top, the supporting member is provided with a positioning column coaxial with the axial cavity and extending into the axial cavity, and the elastic supporting member is connected between the positioning column and the axial cavity.

[0012] 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.

[0013] In a possible implementation, a connecting portion is provided at one end of the rotating member away from the supporting member, the diameter of the connecting portion is smaller than the diameter of the rotating member to form the stepped portion, and the connecting portion is movably fitted in the adjusting groove and connected to the rotating driving component.

[0014] In a possible implementation, it further includes a fixing member for pressing the workpiece onto the supporting member;

[0015] The fixing component is provided with at least two positioning parts and at least two spot welding avoidance positions which are staggeredly distributed along the circumferential direction, wherein the positioning parts are used for being embedded and matched with the matching parts on the workpiece.

[0016] 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.

[0017] In a possible implementation, a central groove is provided at the top of the supporting member, and a connecting portion extending in the axial direction is provided at the bottom of the fixing member, and the connecting portion is embedded and matched with the central groove.

[0018] In a possible implementation, the spot welding avoidance position includes a notch groove hollowed out in the fixing member, the fixing member between two adjacent notches is a fan-shaped structure, and the positioning portion is provided on the fan-shaped structure.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The electric welding machine of the utility model is provided with a workpiece rotation support device at two welding positions. The conducting electrodes at the two welding positions are connected with the conducting electrodes through conductive wires to form a closed current loop. Electric welding processing can be performed at the two welding positions at the same time, which can improve welding efficiency. Moreover, the workpiece fixing components at the two welding positions can embed the supporting components into the positioning grooves on the rotating components through the positioning parts. In this way, the supporting components can be moved relative to the rotating components in the axial direction while maintaining a limiting relationship in the circumferential direction, thereby preventing the supporting components from rotating with the rotating components, thereby improving welding accuracy. At the same time, the limiting parts of the supporting components can form an active limiting relationship with the stepped parts of the rotating components. In this way, when taking the workpiece, even if the supporting components are adsorbed together with the workpiece due to the current, the limiting parts of the limiting parts and the stepped parts can prevent the supporting components from being taken off together, thereby improving usability.

[0021] Moreover, by opening one side of the welding seat to form a movable opening and providing an adjustment groove, the entirety of the workpiece fixing assembly connected to the rotating drive component can be moved relative to the welding seat, thereby being able to adjust the distance between the center of the workpiece fixing assembly and the conducting electrode, thereby enabling processing of workpieces of different diameters, thereby broadening the scope of use.

[0022] At the same time, the workpiece 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 component. 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

[0023] Figure 1 A schematic diagram of the relative positions of a first workpiece and a second workpiece to be welded during welding;

[0024] Figure 2 It is a front view of a spot welding device;

[0025] Figure 3 A three-dimensional view of a workpiece rotation support device for a spot welding device;

[0026] Figure 4 A three-dimensional view of a welding seat of a workpiece rotation support device of a spot welding device;

[0027] Figure 5A three-dimensional view of a workpiece fixing assembly of a workpiece rotation support device of a spot welding device at a first viewing angle;

[0028] Figure 6 A three-dimensional view of a workpiece fixing assembly of a workpiece rotation support device of a spot welding device at a second viewing angle;

[0029] Figure 7 An exploded view of a workpiece fixing assembly of a workpiece rotation support device of a spot welding device;

[0030] Figure 8 A three-dimensional view of a workpiece fixing assembly of a workpiece rotating support device of a spot welding device when a first workpiece and a second workpiece are installed;

[0031] Fig. 9 The present invention is a three-dimensional view of a fixing component of a workpiece fixing assembly of a workpiece rotation support device of a spot welding device.

[0032] In the figure: 1-second workpiece; 2-first workpiece; 21-small folding edge; 3-fixing member; 31-embedded groove; 32-notched groove; 33-fan-shaped structure; 34-center connecting hole; 35-positioning observation part; 36-connecting part; 4-supporting member; 41-positioning part; 42-limiting part; 43-positioning column; 44-center groove; 5-rotating member; 51-positioning groove; 52-first connecting part; 53-axis connecting hole; 54-axis cavity; 6-welding seat; 61-conducting electrode; 62-adjusting groove; 63-movable port; 64-receiving cavity; 65-fixing part; 7-stepping motor; 8-spot welding machine body; 81-welding position; 82-welding electrode; 83-conductive wire. DETAILED DESCRIPTION

[0033] 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.

[0034] Please refer to Figures 1-9, an embodiment of the present application provides a spot welding device, including a spot welding machine body 8 with two welding positions 81, the spot welding machine body 8 is provided with a welding electrode 82 corresponding to each welding position 81, and includes a workpiece rotation support device arranged at the welding position 81.

[0035] By providing workpiece rotation support devices at both welding positions 81 , electric welding can be performed at the two welding positions 81 simultaneously, thereby improving welding efficiency.

[0036] In an embodiment of the present application, the workpiece rotation support device includes a welding seat 6, a rotation driving component, a conducting electrode 61 and a workpiece fixing assembly, the rotation driving component is arranged in the cavity 64 of the welding seat 6, and the conducting electrode 61 is arranged on the welding seat 6 and close to the workpiece fixing assembly; the conducting electrodes 61 of the workpiece rotation support device of the two welding positions 81 are connected by a conductive wire 83 to form a closed current loop with the welding electrode 82.

[0037] Among them, the conducting electrode 61 on the welding seat 6 is used to cooperate with the welding electrode 82 of the spot welding machine for spot welding, and the conducting electrode 61 is fixed on the top of the welding seat 6. The welding seat 6 is a hollow structure, and the cavity 64 formed therein is provided with a rotating driving component such as a stepping motor 7. The workpiece fixing assembly is used to fix the workpiece and perform rotation welding under the drive of the rotating driving component. The workpiece fixing assembly is arranged on one side of the conducting electrode 61 and is fixed by the center of the corresponding workpiece. The conducting electrode 61 cooperates with the conducting electrode 61 on one side to perform circumferential spot welding on the inner side of the first workpiece 2 and the second workpiece 1. The conducting electrodes 61 of the two welding positions 81 are connected by the conductive wire 83 to form a closed current loop with the welding electrode 82, so that the welding of the two welding positions 81 can be realized.

[0038] In order to solve the problem that the support member 4 is easily rotated and removed with the rotating member 5, in an embodiment of the present application, the workpiece fixing assembly may include a support member 4 and a rotating member 5 connected to 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.

[0039] The workpiece fixing assembly of the two welding positions 81 can embed the support member 4 into 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. At the same time, the limiting portion 42 of the support member 4 can form an active limiting relationship with the stepped portion of the rotating member 5. In this way, 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.

[0040] In one embodiment, one side of the cavity 64 is opened to form a movable opening 63, and the top of the welding seat 6 is provided with an adjustment groove 62 extending toward the movable opening 63, the workpiece fixing assembly is inserted into the adjustment opening and connected to the rotating drive component, and the workpiece fixing assembly can move along the adjustment groove 62 to change the distance between the rotating drive device and the conducting electrode 61.

[0041] The rotary drive component can move relative to the welding seat 6, and the movement is relative, that is, the welding seat 6 can be moved relative to the rotary drive component to adjust the spacing. By opening one side of the welding seat 6 to form a movable opening 63 and providing an adjustment groove 62, the entirety of the workpiece fixing assembly connected to the rotary drive component can be moved relative to the welding seat 6, so that the spacing between the center of the workpiece fixing assembly and the conducting electrode 61 can be adjusted, thereby realizing the processing of workpieces of different diameters, thereby widening the scope of use.

[0042] Furthermore, the cavity 64 matches the rotating drive component, and the movable opening 63 has the same cross-sectional profile as the cavity 64 , so that the rotating drive component can enter and exit the movable opening 63 relative to the welding seat 6 .

[0043] In this way, the movable opening 63 of the cavity 64 can facilitate the relative movement of the rotating driving component out of the welding seat 6, and accordingly, the workpiece fixing assembly can move along the adjustment groove 62, so as to better adjust the distance between the workpiece fixing assembly and the conducting electrode 61. Specifically, the adjustment groove 62 is connected to the movable opening 63, which is also more convenient for installation.

[0044] Specifically, the bottom of the welding seat 6 is open, and fixing parts 65 are provided on opposite sides of the welding seat 6. In this way, the welding seat 6 can form a cover-shaped structure, so that after the rotating drive component is fixed on a table, the welding seat 6 can be directly covered thereon and the spacing can be adjusted, that is, when processing workpieces of different diameters, it is only necessary to move the welding machine seat to make adjustments, which is more convenient, and the fixing parts 65 on both sides of the welding seat 6 can be easily fixed by fasteners in a detachable manner, so as to change the fixed position of the welding seat 6.

[0045] In a preferred embodiment of the rotating component 5 , the rotating component 5 is provided with an axial cavity 54 with an open top, the supporting component 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 .

[0046] 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 can be easily installed with an elastic support connection such as a spring (not shown in the figure), and the structural design is more reasonable.

[0047] 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.

[0048] 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 rotation 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.

[0049] In order to prevent the workpiece from slipping during the rotation of the support member 4, an embodiment of the present application also includes a fixing member 3 for pressing the workpiece onto the support member 4; the fixing member 3 is provided with at least two positioning portions 41 and at least two spot welding avoidance positions which are staggeredly distributed along the circumferential direction, wherein the positioning portion 41 is used to be embedded and matched with the matching portion on the workpiece.

[0050] Since the upper surface of the second workpiece 1 is provided with four upwardly turned small folded edges 21 in a circumferential array, the structural characteristics of the small folded edges 21 are utilized, and the positioning portion 41 is provided on the fixing member 3 for embedding and matching with the small folded edges 21 on the first workpiece 2 as a matching portion, so that the fixing member 3 and the first workpiece 2 can form a limiting relationship in the rotation direction, and when pressed, the two workpieces and the support member 4 can be more fixed. In this way, the fixing member 3 is used in conjunction with the support member 4, and the workpieces are fixed by pressing, so that the first workpiece 2 and the second workpiece 1 are not prone to slipping when rotating with the support member 4.

[0051] On this basis, the positioning portions 41 and the spot welding avoidance positions are staggered in the circumferential direction of the fixed component 3, and the positioning portions 41 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 portions 41 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.

[0052] For example, the spot welding avoidance position may include a notch groove 32 formed by hollowing out on the fixing member 3, and the fixing member 3 between two adjacent notch grooves 32 is a fan-shaped structure 33, and the positioning portion 41 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, without limitation. The formed fan-shaped structure 33 is just convenient for setting the positioning portion 41, and the structural design is more reasonable. The positioning portion 41 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.

[0053] Furthermore, 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.

[0054] 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 3. 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 4 and pass into the shaft cavity 54 of the rotating member 5, so that it can be installed more quickly and accurately through the positioning shaft.

[0055] 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.

[0056] When in use, the fixing member 3 is first installed 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, it is placed on the supporting member 4 and passed through by the positioning shaft, and then connected with a pressing piece for pressing or manually fixed during the first spot welding, and then spot welding is achieved under multiple rotations of the stepping motor 7.

[0057] After welding is completed, the holding piece is removed, and the fixing member 3 and the welded first workpiece 2 and the workpiece are removed.

[0058] 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 spot welding device, comprising a spot welding machine body (8) having two welding positions (81), the spot welding machine body (8) being provided with a welding electrode (82) corresponding to each welding position (81), characterized in that: It comprises a workpiece rotation support device arranged at the welding position (81); The workpiece rotation support device comprises a welding seat (6), a rotation drive component, a conducting electrode (61) and a workpiece fixing assembly, wherein the rotation drive component is arranged in a cavity (64) of the welding seat (6), and the conducting electrode (61) is arranged on the welding seat (6) and close to the workpiece fixing assembly; the conducting electrodes (61) of the workpiece rotation support devices at the two welding positions (81) are connected via a conductive wire (83) to form a closed current loop with the welding electrode (82); The workpiece fixing assembly comprises a support member (4) and a rotating member (5) connected to a rotating drive device, the rotating member (5) being connected to the support member (4) via an elastic support member, and the rotating member (5) being provided with at least one positioning groove (51) along a circumferential direction, the support member (4) being provided with a positioning portion (41) movably embedded in the positioning groove (51), the positioning portion (41) forming a limiting relationship with the positioning groove (51) in the circumferential direction; the support member (4) being further provided with a limiting portion (42) extending along a first direction parallel to the axial direction, the limiting portion (42) forming a limiting relationship with a stepped portion provided on the rotating member (5) in the first direction.

2. A spot welding device as claimed in claim 1, characterized in that: One side of the cavity (64) is open to form a movable opening (63); the top of the welding seat (6) is provided with an adjustment groove (62) extending in the direction of the movable opening (63); the workpiece fixing component is inserted into the adjustment opening and connected to the rotary drive component; and the workpiece fixing component can move along the adjustment groove (62) to change the distance between the rotary drive device and the conducting electrode (61).

3. A spot welding device as claimed in claim 2, characterized in that: The cavity (64) matches the rotating drive component, and the cross-sectional profiles of the movable opening (63) and the cavity (64) are consistent, so that the rotating drive component can enter and exit the movable opening (63) relative to the welding seat (6).

4. A spot welding device as claimed in claim 1, characterized in that: The rotating member (5) is provided with an axial cavity (54) with an open top, 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 supporting member is connected between the positioning column (43) and the axial cavity (54).

5. A spot welding device as claimed in claim 4, 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).

6. A spot welding device as claimed in claim 5, characterized in that: A connecting portion (36) is provided at one end of the rotating member (5) facing away from the supporting member (4); the diameter of the connecting portion (36) is smaller than the diameter of the rotating member (5) to form the stepped portion; and the connecting portion (36) is movably fitted in the adjusting groove (62) and connected to the rotating driving component.

7. A spot welding device according to any one of claims 1 to 6, characterized in that: It also includes a fixing member (3) for pressing the workpiece onto the supporting member (4); The fixing component (3) is provided with at least two positioning portions (41) and at least two spot welding avoidance positions which are staggered and distributed along the circumferential direction, wherein the positioning portion (41) is used to be embedded and matched with a matching portion on a workpiece.

8. A spot welding device 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 via the central connecting hole (34).

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

10. A spot welding device as claimed in claim 7, characterized in that: The spot welding avoidance position comprises a notch groove (32) hollowed out on the fixing member (3), a fan-shaped structure (33) is formed between the fixing members (3) between two adjacent notch grooves (32), and the positioning portion (41) is provided on the fan-shaped structure (33).

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