Workpiece rotating and supporting device for spot welding machine

Abstract

The utility model belongs to the technical field of spot welding equipment clamping tools, and discloses a workpiece rotary supporting device for a spot welding machine, which comprises a welding seat, a rotary driving part, a welding electrode and a workpiece fixing component, the rotary driving part is arranged in a containing cavity of the welding seat, and the welding electrode is arranged on the welding seat and close to the workpiece fixing component; one side of the containing cavity is opened to form a movable opening, an adjusting groove extending in the direction of the movable opening is formed in the top of the welding base, and the workpiece fixing assembly penetrates into the adjusting opening to be connected with the rotary driving component. And the workpiece fixing assembly can move relative to the welding seat along the adjusting groove along with the rotary driving part so as to change the distance between the workpiece fixing assembly and the welding electrode. According to the utility model, the whole body formed by connecting the workpiece fixing component and the rotary driving component can move relative to the welding seat, so that the distance between the center of the workpiece fixing component and the welding electrode can be adjusted, workpieces with different diameters can be processed, and the application range is widened.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamping tools for spot welding equipment, and particularly relates to a workpiece rotating support device for a spot welder. Background Art

[0002] An automatic spot welder is an automated processing device dedicated to the welding process of components. The automatic spot welder preferably solves the problems of non-standard welded parts and less welding quantity. It is an automated device with uniform welding formation, accurate positioning, accurate welding delay, and can work continuously. The device welds two annular workpieces placed on a rotatable workpiece fixing component through a welding electrode that can move up and down. These two workpieces are as Figure 1 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 at a position in the top groove of the second workpiece and welded at four circumferential points for fixation.

[0003] In the prior art, the workpiece fixing component is generally connected to a stepping motor and can rotate. It mainly includes a supporting member, and the supporting member can place the first workpiece and the second workpiece. However, since the positions of the stepping motor and the welding electrode used to cooperate with the spot welder for welding are relatively fixed, this results in that it cannot be used when welding first workpieces and second workpieces with different diameters, and the weldable workpiece sizes are single. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a workpiece rotating support device for a spot welder to solve the problem of single weldable workpiece sizes of the existing workpiece fixing component.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A workpiece rotating support device for a spot welder includes a welding seat, a rotation driving component, a welding electrode, and a workpiece fixing component. The rotation driving component is arranged in the accommodation cavity of the welding seat, and the welding electrode is arranged on the welding seat and close to the workpiece fixing component;

[0007] One side of the accommodation cavity is open to form an activity port. An adjustment groove extending towards the activity port is arranged on the top of the welding seat. The workpiece fixing component penetrates through the adjustment port and is connected to the rotation driving component, and the workpiece fixing component can move relative to the welding seat along the adjustment groove with the rotation driving component to change the distance between the workpiece fixing component and the welding electrode.

[0008] In a possible implementation manner, the accommodation cavity matches the rotation driving component, and the cross-sectional profile of the activity port is consistent with that of the accommodation cavity, so that the rotation driving component can enter and exit the activity port relative to the welding seat.

[0009] In a possible implementation, the bottom of the welding seat is open, and fixing portions are provided on two opposite sides of the welding seat.

[0010] In a possible implementation, the workpiece fixing assembly includes a supporting member and a rotating member connected to a rotating driving member, the rotating member is connected to the supporting member via an elastic support, 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 the step-shaped portion arranged on the rotating member form a limiting relationship in the first direction.

[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 connecting 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 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.

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

[0019] The workpiece rotating support device for a spot welder according to the present utility model forms an activity opening by opening one side of the welding seat and is provided with an adjustment groove, so that the whole connected by the workpiece fixing component and the rotation driving component can move relative to the welding seat, thereby being able to adjust the distance between the center of the workpiece fixing component and the welding electrode, and further being able to process workpieces with different diameters, broadening the scope of use.

[0020] Moreover, the supporting member of the workpiece fixing component is embedded and connected with the positioning groove on the rotating member through the positioning part. In this way, it is not only convenient for the supporting member to move axially relative to the rotating member, but also can maintain a limiting relationship in the circumferential direction, thereby being able to prevent the supporting member from rotating with the rotating member, improving the welding accuracy, and the limiting part of the supporting member can form an activity limiting relationship with the stepped part of the rotating member. In this way, when taking the workpiece, even if the supporting member is adsorbed together with the workpiece due to the current, the limiting of the limiting part and the stepped part can prevent the supporting member from being taken off together, improving the usability.

[0021] At the same time, the workpiece can also be pressed by the fixing member, so that it is not easy for slippage to occur between the first workpiece and the second workpiece and between the workpiece and the supporting member, and by using the small flanging structure on the second workpiece, it is convenient to cooperate with the positioning part to better avoid slippage, further improving the spot welding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the relative positions of the first workpiece and the second workpiece to be welded during welding;

[0023] Figure 2 It is a perspective view of a workpiece rotating support device for a spot welder;

[0024] Figure 3 It is a perspective view of the welding seat of a workpiece rotating support device for a spot welder;

[0025] Figure 4 It is a perspective view of the workpiece fixing component of a workpiece rotating support device for a spot welder from the first perspective;

[0026] Figure 5 It is a perspective view of the workpiece fixing component of a workpiece rotating support device for a spot welder from the second perspective;

[0027] Figure 6 It is an exploded view of the workpiece fixing component of a workpiece rotating support device for a spot welder;

[0028] Figure 7 It is a perspective view of a workpiece rotating support device for a spot welder when the first workpiece and the second workpiece are installed on the workpiece fixing component;

[0029] Figure 8 A perspective view of a fixing member of a fixing device for spot welding of workpieces.

[0030] In the figure: 1 - second workpiece; 2 - first workpiece; 21 - small hem; 3 - fixing member; 31 - slot; 32 - notch groove; 33 - fan-shaped structure; 34 - central connection hole; 35 - positioning and observing part; 36 - connection part; 4 - supporting member; 41 - positioning part; 42 - limiting part; 43 - positioning column; 44 - central groove; 5 - rotating member; 51 - positioning groove; 52 - first connection part; 53 - shaft connection hole; 54 - shaft cavity; 6 - welding seat; 61 - welding electrode; 62 - adjusting groove; 63 - movable opening; 64 - cavity; 65 - fixing part; 7 - stepping motor. Detailed implementation manners

[0031] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further described in detail below in conjunction with the specific implementation manners.

[0032] Please refer to Figure 1-8 As shown, an embodiment of the present application provides a workpiece rotating and supporting device for a spot welder, including a welding seat 6, a rotation driving component, a welding electrode 61, and a workpiece fixing component. The rotation driving component is arranged in the cavity 64 of the welding seat 6, and the welding electrode 61 is arranged on the welding seat 6 and close to the workpiece fixing component.

[0033] Among them, the welding electrode 61 on the welding seat 6 is used to cooperate with the spot welding electrode of the spot welder for spot welding, and the welding electrode 61 is fixed on the top of the welding seat 6. The welding seat 6 is a hollow structure, and a cavity 64 formed therein is provided with rotation driving components such as a stepping motor 7. The workpiece fixing component is used to fix the workpiece and rotate and weld under the drive of the rotation driving component. The workpiece fixing component is arranged on one side of the welding electrode 61 and is fixed through the center of the corresponding workpiece. The welding electrode 61 then performs circumferential spot welding on the inner sides of the first workpiece 2 and the second workpiece 1 on one side.

[0034] In order to be able to weld workpieces with different diameter sizes, in the embodiment of the present application, 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 adjusting groove 62 extending towards the movable opening 63, the workpiece fixing component penetrates into the adjusting opening and is connected to the rotation driving component, and the workpiece fixing component can move relative to the welding seat 6 along the adjusting groove 62 with the rotation driving component to change the distance between the workpiece fixing component and the welding electrode 61.

[0035] The rotation driving component can move relative to the welding base 6. When moving, relatively speaking, it can also be that the welding base 6 is moved while moving relative to the rotation driving component to adjust the distance. By opening one side of the welding base 6 to form a movable opening 63 and arranging an adjustment groove 62, the whole of the workpiece fixing component connected to the rotation driving component can move relative to the welding base 6, so that the distance between the center of the workpiece fixing component and the welding electrode 61 can be adjusted. Furthermore, workpieces with different diameters can be processed, broadening the scope of use.

[0036] In an embodiment, the cavity 64 matches the rotation driving component, and the cross-sectional profiles of the movable opening 63 and the cavity 64 are the same, so that the rotation driving component can enter and exit the movable opening 63 relative to the welding base 6.

[0037] In this way, the movable opening 63 of the cavity 64 can facilitate the relative movement of the rotation driving component out of the welding base 6. Correspondingly, the workpiece fixing component can move along the adjustment groove 62, so that the distance between the workpiece fixing component and the welding electrode 61 can be adjusted better. Specifically, the adjustment groove 62 penetrates through to the movable opening 63, which is also more convenient for installation.

[0038] Furthermore, the bottom of the welding base 6 is open, and fixing parts 65 are arranged on the opposite sides of the welding base 6.

[0039] In this way, the welding base 6 can form a cover-shaped structure. After the rotation driving component is fixed on a tabletop, the welding base 6 can be directly covered thereon and the distance can be adjusted. That is, when processing workpieces with different diameter sizes, only the welding machine base needs to be moved for adjustment, which is more convenient. And through the fixing parts 65 on both sides of the welding base 6, it is convenient to be detachably fixed by fasteners, so as to facilitate changing the fixing position of the welding base 6.

[0040] In a preferred embodiment regarding the workpiece fixing component, the workpiece fixing component includes a support member 4 and a rotating member 5 connected to the rotation driving component. The rotating member 5 is connected to the support member 4 through an elastic support member, and at least one positioning groove 51 is arranged along the circumferential direction of the rotating member 5. The support member 4 is provided with a positioning portion 41 that is movably embedded in the positioning groove 51. The positioning portion 41 and the positioning groove 51 form a limiting relationship in the circumferential direction; the support member 4 is further provided with a limiting portion 42 extending along a first direction parallel to the axial direction. The limiting portion 42 and a stepped portion arranged on the rotating member 5 form a limiting relationship in the first direction.

[0041] 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 61 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, and 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, thereby improving the accuracy of welding. 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.

[0042] On this basis, the rotating member 5 is provided with an open shaft cavity 54, the supporting member 4 is provided with a positioning column 43 coaxial with the shaft cavity 54 and extending into the shaft cavity 54, and the elastic connecting member is connected between the positioning column 43 and the shaft cavity 54. In this way, the supporting 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 an elastic support connection such as a spring (not shown in the figure), and the structural design is more reasonable.

[0043] 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.

[0044] 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 used to easily connect the rotating drive component, so that the device as a whole can be rotated for welding, and at the same time, it is also convenient to form the stepped portion.

[0045] Specifically, the first connecting portion 52 is provided with a shaft connecting hole 53 for connecting the driving shaft of the rotating driving component. The rotating driving component is preferably a stepping motor 7, whose output shaft is connected to the shaft connecting hole 53 of the first connecting portion 52 and is fixed by a pin through a pin hole on the side to achieve connection.

[0046] In order to prevent the workpiece from slipping easily during the rotation with the support member 4, in the embodiment of the application, the workpiece fixing assembly further includes a fixing member 3 for pressing the workpiece against the support member 4.

[0047] The fixing member 3 is used in cooperation with the support member 4 and fixes the workpiece in a pressing manner, so that the first workpiece 2 and the second workpiece 1 are not prone to slipping during the rotation with the support member 4.

[0048] In a preferred embodiment of the fixing member 3, the fixing member 3 is provided with at least two positioning connection parts and at least two spot welding avoidance positions which are distributed alternately in the circumferential direction, and the positioning connection parts are used for being embedded and matched with the matching parts on the workpiece.

[0049] Since four small flanges 21 that turn upwards are circumferentially arrayed on the upper surface of the second workpiece 1, by utilizing the structural characteristics of the small flanges 21, the fixing member 3 is provided with positioning connection parts for being embedded and matched with the small flanges 21 on the first workpiece 2 as the matching parts, so that a limiting relationship can be formed between the fixing member 3 and the first workpiece 2 in the rotation direction, and when being pressed, the two workpieces and the support member 4 can be more fixed.

[0050] On this basis, the positioning connection parts and the spot welding avoidance positions are alternately distributed in the circumferential direction of the fixing member 3, and the positioning connection parts and the spot welding avoidance positions are circumferentially arrayed in the circumferential direction of the fixing member 3. In this way, the alternately distributed positioning connection parts and spot welding avoidance positions can facilitate switching to the spot welding avoidance positions for spot welding after rotating by an angle, which is beneficial to welding when rotating by the same angle each time, improves the welding efficiency, and can also realize equal-angle multi-point rotary welding.

[0051] 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 in a fan-shaped structure 33, and the positioning part 41 is arranged on the fan-shaped structure 33. The notch groove 32 can provide better avoidance for welding. Of course, it can also be a hole-shaped hollow structure, which is not limited. And the formed fan-shaped structure 33 is just convenient for arranging the positioning part 41, and the structural design is more reasonable. The positioning part 41 is an embedding groove 31, and the matching part is a protrusion matching with the embedding groove 31, and the protrusion is the small flange 21 structure of the workpiece with a smaller diameter.

[0052] Further, to facilitate the pressing of the fixing member 3 on the supporting member 4, a positioning shaft extending axially is provided at the center of the top of the supporting member 4 (not shown in the figure), and the fixing member 3 is provided with a central connection hole 34 and is connected to the positioning shaft through the central connection hole 34. The installation of the fixing member 3 can be facilitated by the positioning shaft, and the fixing member 3 can be pressed through threading with the positioning shaft or another pressing member II, without limitation.

[0053] Specifically, it further includes a pressing member (not shown in the figure), the pressing member is threadedly connected to the positioning shaft, and the pressing member is located above the fixing member 3. By means of the pressing member, the fixing member 3 can press the first workpiece 2 and the second workpiece 1 on the supporting member 4. The pressing member can be a nut. The positioning shaft can penetrate through the supporting member 4 and extend into the shaft cavity 54 of the rotating member 5, so as to facilitate relatively fast and accurate installation through the positioning shaft.

[0054] To achieve the positioning connection and quick installation of the fixing member 3 and the supporting member 4, furthermore, a central groove 44 is provided at the top of the supporting member 4, and a second connecting portion 36 extending axially is provided at the bottom of the fixing member 3. The second connecting portion 36 is in interference fit with the central groove 44. The second connecting portion 36 can be connected to the central groove 44 provided on the supporting member 4 to play a positioning role.

[0055] During use, first install the fixing member 3 on the second workpiece 1. 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 initially connected together. Then place it on the supporting member 4 and be penetrated by the positioning shaft, and then connect the pressing member for pressing or manual fixation during the first spot welding, and then perform spot welding fixation under the multiple rotations of the stepping motor 7.

[0056] After welding is completed, remove the pressing member, and the fixing member 3 and the welded first workpiece 2 and the second workpiece can be removed.

[0057] The above is only the preferred embodiment of the present invention. It should be noted that the above preferred embodiment should not be regarded as a limitation of the present invention. The protection scope of the present invention should be subject to the scope defined by the claims. For those of ordinary skill in the art of this technology, without departing from the spirit and scope of the present invention, several improvements and retouches can still be made, and these improvements and retouches should also be regarded as the protection scope of the present invention.

Claims

1. A workpiece rotation support device for a spot welding machine, characterized in that: It comprises a welding seat (6), a rotating drive component, a welding electrode (61) and a workpiece fixing assembly, wherein the rotating drive component is arranged in a cavity (64) of the welding seat (6), and the welding electrode (61) is arranged on the welding seat (6) and close to the workpiece fixing assembly; 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 rotating drive component; and the workpiece fixing component can move along the adjustment groove (62) with the rotating drive component relative to the welding seat (6) to change the distance between the workpiece fixing component and the welding electrode (61).

2. A workpiece rotation support device for a spot welding machine as claimed in claim 1, characterized in that: The cavity (64) matches the rotating drive component, and the movable opening (63) and the cavity (64) have consistent cross-sectional profiles, so that the rotating drive component can enter and exit the movable opening (63) relative to the welding seat (6).

3. A workpiece rotation support device for a spot welding machine as claimed in claim 2, characterized in that: The bottom of the welding seat (6) is open, and fixing portions (65) are provided on two opposite sides of the welding seat (6).

4. A workpiece rotation support device for a spot welding machine as described in any one of claims 1 to 3, characterized in that: The workpiece fixing assembly comprises a support member (4) and a rotating member (5) connected to a rotating driving member, 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.

5. A workpiece rotation support device for a spot welding machine as claimed in claim 4, 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).

6. A workpiece rotation support device for a spot welding machine 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).

7. A workpiece rotation support device for a spot welding machine as claimed in claim 4, 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.

8. A workpiece rotation support device for a spot welding machine as claimed in claim 4, characterized in that: It also comprises a fixing member (3) for pressing the workpiece onto the supporting member (4); the fixing member (3) is provided with at least two positioning connection parts and at least two spot welding avoidance positions which are staggered and distributed along the circumferential direction, wherein the positioning connection parts are used to be embedded and matched with the matching parts on the workpiece.

9. A workpiece rotation support device for a spot welding machine as claimed in claim 8, characterized in that: A positioning shaft extending in the axial direction is provided at the top center of the support 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).

10. A workpiece rotation support device for a spot welding machine as claimed in claim 9, 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).

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