An automatic welding device for welding sheet metal workpieces

Abstract

The present application relates to the field of welding, specifically to an automatic welding device for sheet metal workpiece welding, comprising a machine body, an opening support assembly, a closing support assembly and a welding assembly, the opening support assembly comprises a No.1 disc and a plurality of No.1 support rods mounted on the machine body, the No.1 support rods are in sliding connection with the No.1 disc, the closing support assembly comprises a plurality of No.2 support rods, the welding assembly comprises a sliding groove and a welding gun, and the automatic welding device further comprises a pressing assembly for pressing the annular sheet metal workpiece, the pressing assembly comprises a No.2 disc slidingly mounted on the No.1 disc, the No.1 support rods and the No.2 support rods all penetrate through the No.2 disc and are in sliding connection with the No.2 disc, a No.1 ring is mounted on the periphery of the No.2 disc, a sliding block is slidingly mounted on the No.1 ring, and a pressing structure is inserted into the sliding block, by arranging the pressing assembly, the joint of the sheet metal workpiece is pressed during welding, so as to press the edge of the sheet metal workpiece and align the joint of the sheet metal workpiece, thereby ensuring the welding effect after welding.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of welding, in particular to an automatic welding device for sheet metal workpiece welding. BACKGROUND

[0002] Sheet metal is a process for processing metal sheets, including shearing, bending and splicing and other cold processing methods, and sheet metal workpieces are products processed by sheet metal processes, including metal sheets after annular bending, which can be processed into annular plates or conical plates by welding devices.

[0003] A patent application with publication number CN116000628A discloses a sheet metal workpiece welding device, which comprises a rack, a linear drive mechanism mounted on the rack, an expansion mechanism for supporting the sheet metal workpiece, a folding mechanism for positioning the sheet metal workpiece, and a welding assembly arranged on the folding mechanism. The present application expands the bent sheet metal workpiece through the expansion mechanism, then folds the plate through the folding mechanism until the seams of the sheet metal workpiece are aligned, and then welds the seams of the sheet metal workpiece through the welding assembly. After welding, a conical plate is obtained.

[0004] After the sheet metal workpiece is circularly bent by the bending device, the seams of the sheet metal workpiece have a raised edge. The folding assembly of the above-mentioned scheme is composed of several arc-shaped plates, which do not contact the seams of the sheet metal workpiece during welding, so the raised edge cannot be processed, resulting in poor welding effect. SUMMARY

[0005] Therefore, the technical problem to be solved by the present application is to overcome the problem of raised edge affecting the welding effect in the prior art.

[0006] To solve the above technical problems, the present application provides an automatic welding device for sheet metal workpiece welding, which comprises a machine body, an opening component, a closing component and a welding component, the opening component comprises a first disc and a plurality of first supporting rods installed on the machine body, the first supporting rods are in sliding connection with the first disc, the closing component comprises a plurality of second supporting rods, the welding component comprises a sliding groove installed on the machine body, a welding gun is installed in the sliding groove, and the device further comprises a pressing component for pressing the annular sheet metal workpiece, the pressing component comprises a second disc installed on the first disc, the first supporting rods and the second supporting rods penetrate through the second disc and are in sliding connection with the second disc, a first ring is installed on the periphery of the second disc, a sliding block is installed on the first ring, a pressing structure is inserted into the sliding block, the pressing structure comprises two connecting blocks and two pressing plates, the pressing plates are in sliding connection with the connecting blocks, and the two pressing plates are used for pressing the outer periphery and the inner periphery of the annular sheet metal workpiece respectively.

[0007] In an embodiment of the present application, the first ring is in rotary connection with the second disc, the first ring contains a plurality of pressing structures and sliding blocks, and a telescopic plate is installed on the second disc in sliding mode, and the telescopic plate is used for clamping the pressing structure.

[0008] In an embodiment of the present application, the opening component further comprises a second ring installed on the outside of the first disc and a first arc-shaped block for driving the first supporting rods to slide, two ends of the first arc-shaped block are in rotary connection with the second ring and the first supporting rods respectively, the closing component comprises a short rod installed on the first disc in sliding mode, a third ring installed on the first disc in rotary mode and a second arc-shaped block for driving the short rod to slide, two ends of the second arc-shaped block are in rotary connection with the third ring and the short rod respectively, a connecting plate is fixedly installed on the short rod, and the second supporting rods are installed on the connecting plate.

[0009] In an embodiment of the present application, the device further comprises a main gear installed on the first disc in sliding mode, a first gear and a second gear fixedly installed on the second ring and the third ring respectively, the main gear is in meshing connection with the first gear and the second gear respectively in sliding mode, a third gear is installed on the first disc in rotary mode, the third ring is in meshing connection with the third gear, a notch is formed in the first gear, and the third gear is inserted into the notch.

[0010] In an embodiment of the present application, the closing component further comprises a first telescopic rod fixedly installed on the connecting plate, the second supporting rods are in sliding connection with the connecting plate, and the movable end of the first telescopic rod is fixedly connected with the second supporting rods.

[0011] In one embodiment of the present application, the first disc is rotationally connected to the body, and the device further comprises a positioning assembly, which comprises: an arc-shaped slot slidingly installed on the first disc; a second telescopic rod rotationally installed on the arc-shaped slot; a telescopic block fixedly installed on the second telescopic rod, the lower end of the telescopic block being triangular in structure; a first spring installed in the arc-shaped slot; and a switch slidingly installed on the slot, the switch being triggered when the second telescopic rod is rotated to be vertically upward, and the switch being capable of controlling the operation of the welding gun after being triggered.

[0012] In one embodiment of the present application, the positioning assembly further comprises a first rack plate fixedly installed below the arc-shaped slot; and a pinion rotationally installed on the first disc, the first rack plate being meshingly connected to the pinion.

[0013] In one embodiment of the present application, the positioning assembly further comprises: a fourth gear rotationally installed on the second telescopic rod, the arc-shaped slot being provided with teeth meshingly connected to the fourth gear; and a second rack plate slidingly installed on the arc-shaped slot.

[0014] In one embodiment of the present application, the positioning assembly further comprises: a block slidingly installed on the arc-shaped slot, the block being located in the moving range of the second rack plate; a second spring installed between the second rack plate and the arc-shaped slot; a push plate slidingly installed on the telescopic block, the push plate being slidingly connected to the block; a third telescopic rod installed on the arc-shaped block, the third telescopic rod being used to push the second rack plate to move upward.

[0015] In one embodiment of the present application, the body is of telescopic structure, and the body contains two groups of the opening assembly, the folding assembly and the pressing assembly, the first support rod and the second support rod of the two groups of the opening assembly and the folding assembly being respectively of plug-in structure.

[0016] The above technical solution of the present application has the following advantages compared with the prior art:

[0017] 1. The automatic welding device for welding sheet metal workpieces has the advantages that the pressing assembly is arranged to press the joint of the sheet metal workpiece during welding, so as to press the bent edge of the sheet metal workpiece and align the joint of the sheet metal workpiece, thereby ensuring the welding effect after welding.

[0018] 2. The automatic welding device for welding sheet metal workpieces has the advantages that the positioning assembly is arranged to adjust the position of the joint after the two sides of the annular sheet metal workpiece are aligned, until the joint is aligned with the welding gun, so as to ensure the welding effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to make the content of the present application more easily understood, the present application is further described in detail below according to specific embodiments of the present application and in conjunction with the accompanying drawings.

[0020] Figure 1 is a perspective view of the body of the present application;

[0021] Figure 2 is a structural schematic view of the second disc and pressing structure of the present application;

[0022] Figure 3 is a structural schematic view of the third ring and third gear of the present application;

[0023] Figure 4 is a structural schematic view of the first arc-shaped block and second arc-shaped block of the present application;

[0024] Figure 5 is a position schematic view of the gap of the present application;

[0025] Figure 6 is a structural schematic view of the first disc of the present application;

[0026] Figure 7 is a structural schematic view of the arc-shaped groove of the present application;

[0027] Figure 8 is Figure 6 is a local enlarged view at A in FIG. 6;

[0028] Figure 9 is a structural schematic view of the push plate and stop block of the present application;

[0029] DESCRIPTION OF DRAWINGS: 1, body; 2, expansion assembly; 21, first disc; 22, first support rod; 23, second ring; 24, first arc-shaped block; 3, folding assembly; 31, second support rod; 32, short rod; 33, third ring; 34, second arc-shaped block; 35, connecting plate; 36, first telescopic rod; 4, welding assembly; 41, sliding groove; 42, welding gun; 5, pressing assembly; 51, second disc; 52, first ring; 53, sliding block; 54, pressing structure; 541, connecting block; 542, pressing plate; 55, telescopic plate; 6, main gear; 7, first gear; 8, second gear; 9, third gear; 10, gap; 11, positioning assembly; 111, arc-shaped groove; 112, second telescopic rod; 113, telescopic block; 114, first spring; 115, switch; 116, first rack plate; 117, fourth gear; 118, second rack plate; 119, stop block; 1110, second spring; 1111, push plate; 1112, third telescopic rod; 1113, sub gear. DETAILED DESCRIPTION

[0030] The application will be further described below in conjunction with the drawings and specific embodiments so that those skilled in the art can better understand and implement the application, but the embodiments are not intended to limit the application.

[0031] Referring to Figures 1-9 As shown in the drawings, the automatic welding device for welding sheet metal workpieces of the application comprises a machine body 1, an opening component 2, a closing component 3 and a welding component 4. The opening component 2 comprises a first disc 21 and a plurality of first support rods 22, the first support rods 22 are in sliding connection with the first disc 21, the closing component 3 comprises a plurality of second support rods 31, the welding component 4 comprises a sliding groove 41 which is installed on the machine body 1, a welding gun 42 is installed in the sliding groove 41, and the device further comprises a pressing component 5 for pressing the annular sheet metal workpiece, the pressing component 5 comprises a second disc 51 which is installed on the first disc 21, the first support rods 22 and the second support rods 31 all penetrate through the second disc 51 and are in sliding connection with the second disc 51, a first ring 52 is installed on the periphery of the second disc 51, a sliding block 53 is installed on the first ring 52, a pressing structure 54 is inserted into the sliding block 53, the pressing structure 54 comprises two connecting blocks 541 and two pressing plates 542, the pressing plates 542 are in sliding connection with the connecting blocks 541, and the two pressing plates 542 are respectively used for pressing the outer periphery and the inner periphery of the annular sheet metal workpiece.

[0032] Specifically, after the sheet metal workpiece is circularly bent by the bending device, the edge lifting phenomenon occurs at the joint of the sheet metal workpiece, the folding assembly 3 is composed of a plurality of second supporting rods 31, and the second supporting rods 31 do not contact the joint of the sheet metal workpiece during welding, so that the edge lifting cannot be processed, and the welding effect is poor after welding; the welding gun 42 adopts a gas welding gun, and welding is performed by using the heat generated by combustion of combustible gas. During use, the annular sheet metal workpiece is inserted into the periphery of the first supporting rod 22 and located inside the second supporting rod 31, then the first supporting rod 22 is controlled to expand outward until the two sides of the annular sheet metal workpiece are separated, then the second supporting rod 31 is controlled to shrink inward until the second supporting rod 31 contacts the outer wall of the annular sheet metal workpiece, at this time, the annular sheet metal workpiece is fixed between the second supporting rod 31 and the first supporting rod 22, then the second disc 51 is controlled to slide towards the direction close to the annular sheet metal workpiece, driving the pressing structure 54 to move synchronously, and the pressing structure 54 is controlled to move up and down at the same time until the two pressing plates 542 of the pressing structure 54 are located on the outside and the inside of the joint of the sheet metal workpiece, respectively, then the first supporting rod 22 and the second supporting rod 31 are controlled to fold so that the two sides of the sheet metal workpiece are close to each other, and the two pressing plates 542 are controlled to move towards each other, so that the sheet metal workpiece with edge lifting can be pressed to align the joint of the sheet metal workpiece, then the welding gun 42 is controlled to slide on the sliding groove 41, and the joint is welded at the same time, when the welding gun 42 is close to the pressing plate 542, the pressing structure 54 is controlled to release the sheet metal workpiece, then the second disc 51 is controlled to move away from the sheet metal workpiece, driving the pressing structure 54 to move away synchronously, then the welding gun 42 is controlled to continue welding the remaining position of the joint, after welding is completed, the first supporting rod 22 and the second supporting rod 31 are controlled to release the sheet metal workpiece, that is, the welding action of the sheet metal workpiece is completed; by arranging the pressing assembly 5, the joint of the sheet metal workpiece is pressed during welding to press the edge lifting of the sheet metal workpiece, so that the joint of the sheet metal workpiece is aligned, and the welding effect after welding is guaranteed.

[0033] Referring to Figure 2 As shown in the figure, the first annular ring 52 is rotationally connected with the second disc 51, the first annular ring 52 contains a plurality of pressing structures 54 and sliding blocks 53, and the second disc 51 is slidably provided with an extension plate 55 for clamping the pressing structure 54.

[0034] Specifically, the curvature of the pressure plates 542 and 542 of the several pressing structures 54 is different to accommodate ring-shaped sheet metal workpieces of different sizes. According to the ring-shaped sheet metal workpieces of different sizes, the first ring 52 is controlled to rotate so that the pressing structure 54 of the corresponding size is located directly above the telescopic plate 55. The slider 53 is controlled to drive the pressing structure 54 to move downward. Then, the telescopic plate 55 is controlled to clamp the two sides of the pressing structure 54. The telescopic plate 55 is controlled to move downward. The slider 53 and the pressing structure 54 are interlocked. Therefore, after the pressing structure 54 moves downward, it can separate from the slider 53. The telescopic plate 55 can drive the two pressure plates 542 of the pressing structure 54 to the height of the upper and lower sides of the joint. By setting multiple pressing structures 54, the practicality of the device is enhanced. It is not necessary to replace the pressing structure 54 before each operation, making it convenient to use.

[0035] Reference Figures 3-4 As shown, the spreading component 2 further includes a second ring 23 rotatably mounted on the outside of the first disc 21 and a first arc-shaped block 24 that drives the first support rod 22 to slide. The two ends of the first arc-shaped block 24 are rotatably connected to the second ring 23 and the first support rod 22, respectively. The closing component 3 includes a short rod 32 slidably mounted on the first disc 21, a third ring 33 rotatably mounted on the first disc 21, and a second arc-shaped block 34 that drives the short rod 32 to slide. The two ends of the second arc-shaped block 34 are rotatably connected to the third ring 33 and the short rod 32, respectively. A connecting plate 35 is fixedly mounted on the short rod 32, and the second support rod 31 is mounted on the connecting plate 35.

[0036] Specifically, during operation, the annular sheet metal workpiece is inserted between support rod 22 and support rod 31, controlling the second ring 23 to rotate clockwise (to... Figure 4 Taking the perspective of [the device] as an example, the first arc block 24 is moved, causing the first support rod 22 connected to it to move away from each other, that is, the first support rod 22 expands outward until the two sides of the joint of the annular sheet metal workpiece are separated, avoiding the problem of the two sides of the annular sheet metal workpiece overlapping. Then, the third ring 33 is controlled to rotate counterclockwise, causing the second arc block 34 to move, and the short rod 32 connected to it to move towards each other, causing the connecting plate 35 and the second support rod 31 to move synchronously, that is, the second support rod 31 retracts.

[0037] like Figures 3-5As shown, the device further comprises: a main gear 6 slidingly mounted on the first disc 21; a first gear 7 and a second gear 8 fixedly mounted on the second ring 23 and the third ring 33 respectively, the main gear 6 slidingly engaging with the first gear 7 and the second gear 8 respectively; a third gear 9 rotatably mounted on the first disc 21, the third ring 33 engaging with the third gear 9; a notch 10 opened on the first gear 7, the third gear 9 being inserted into the notch 10.

[0038] Specifically, in the initial state, the main gear 6 engages with the first gear 7, after the annular sheet metal workpiece is inserted into the first support rod 22 and the second support rod 31, the main gear 6 is controlled to rotate, so that the first gear 7 rotates clockwise, driving the second ring 23 to rotate synchronously, so that the first support rod 22 expands outward, until the two sides of the annular sheet metal workpiece joint are separated, when the first gear 7 rotates, the notch 10 rotates synchronously, so that the distance between the third gear 9 and one side of the notch 10 decreases, then the main gear 6 is controlled to move towards the second gear 8, so that the second gear 8 rotates counterclockwise, the first gear 7 is stationary, the second gear 8 rotates driving the third ring 33 to rotate synchronously, the third ring 33 rotates driving the third gear 9 to rotate synchronously, when the third gear 9 rotates to contact one side of the notch 10, it can drive the first gear 7 to rotate synchronously, at this time the first support rod 22 and the second support rod 31 clamp the annular sheet metal workpiece, after the first gear 7 rotates together with the second gear 8, the first support rod 22 is retracted, the second support rod 31 pushes the annular sheet metal workpiece to retract, so that the two sides of the sheet metal workpiece are close to each other; since the angle of the notch 10 is unchanged, a, when the first support rod 22 expands, the rotation angle of the first gear 7 is b, the included angle between the third gear 9 and one side of the notch 10 is a-b, after the third ring 33 and the second gear 8 rotate a-b, the first support rod 22 and the second support rod 31 clamp the sheet metal workpiece in the middle, then the first gear 7 and the first ring 52 can be rotated by the third gear 9, so that the first support rod 22 is retracted together with the second support rod 31, therefore the device can adapt to different sizes of annular sheet metal workpieces of the same thickness, and is more practical.

[0039] Referring to Figure 5 As shown, the retraction assembly 3 further comprises a first telescopic rod 36 fixedly mounted on the connecting plate 35, the second support rod 31 slidingly connecting with the connecting plate 35, the movable end of the first telescopic rod 36 fixedly connecting with the second support rod 31.

[0040] Specifically, by controlling the extension and retraction of the first telescopic rod 36, the second support rod 31 can be slidingly driven on the connecting plate 35 to control the initial distance between the first telescopic rod 36 and the second telescopic rod 112, so that the device can adapt to annular sheet metal workpieces of different thicknesses, and is more practical.

[0041] Referring to Figure 1 , Figure 4 and Figure 8 , the first disc 21 is rotationally connected to the machine body 1, and the device further comprises a positioning assembly 11, which comprises: an arc-shaped slot 111 slidingly installed on the first disc 21; a second telescopic rod 112 rotationally installed on the arc-shaped slot 111; a telescopic block 113 fixedly installed on the second telescopic rod 112, the lower end of the telescopic block 113 being triangular in structure; a first spring 114 installed in the arc-shaped slot 111; a switch 115 slidingly installed on the sliding slot 41, which can be triggered when the second telescopic rod 112 is rotated to be vertically upward, and the switch 115 can control the welding gun 42 to work after being triggered.

[0042] Specifically, the existing device cannot adjust the position of the joint after the annular sheet metal workpiece is gathered, so there is a situation that the welding gun 42 is not aligned with the joint during welding, which affects the welding effect; the telescopic block 113 adopts a structure in which the spring inside the telescopic block 113 has a greater spring force than the first spring 114, before work, the joint of the annular sheet metal workpiece is placed upward (without the need for special accuracy), after the first support rod 22 expands outward, the two sides of the annular sheet metal workpiece are separated, an opening is generated in the middle, the second telescopic rod 112 is controlled to extend towards the annular sheet metal workpiece, driving the telescopic block 113 to move synchronously, until the telescopic block 113 is inserted into the joint, then the second support rod 31 is controlled to gather inward, driving the two sides of the annular sheet metal workpiece to move towards each other, in the process of gathering, the telescopic block 113 is pushed by the two sides of the annular sheet metal workpiece, first sliding in the arc-shaped slot 111, i.e. the second telescopic rod 112 and the telescopic block 113 rotate around the central axis of the first disc 21, at this time the first spring 114 is deformed, until the two sides of the annular sheet metal workpiece are in contact with the telescopic block 113, are extruded by the two sides of the annular sheet metal workpiece, the telescopic block 113 is contracted upward, until the joint of the annular sheet metal workpiece is aligned, at this time the position of the second telescopic rod 112 in the arc-shaped slot 111 is kept unchanged, the switch 115 is controlled to slide downward, until it is located within the movement range of the second telescopic rod 112, then the first disc 21 is controlled to rotate, driving the first support rod 22 and the second support rod 31 to rotate synchronously, driving the annular sheet metal workpiece, the second telescopic rod 112 and the telescopic block 113 to rotate synchronously, until the second telescopic rod 112 is rotated to be vertically upward, at this time the second telescopic rod 112 can trigger the switch 115, after the switch 115 is triggered, the welding gun 42 is controlled to work, welding the joint, when the telescopic block 113 is approached, the pressing structure 54 and the telescopic block 113 are controlled to move away from the annular sheet metal workpiece synchronously; by setting the positioning assembly 11, after the two sides of the annular sheet metal workpiece are aligned, the position of the joint is adjusted, until the joint is aligned with the welding gun 42, to ensure the welding effect.

[0043] Referring to Figure 4 As shown in the drawings, the positioning assembly 11 further comprises a first rack plate 116 fixedly installed below the arc-shaped groove 111; a sub-gear 1113 rotatably installed on the first disc 21, and the first rack plate 116 is in meshing connection with the sub-gear 1113.

[0044] Specifically, in the initial state, the sub-gear 1113 is not in meshing connection with the main gear 6, after the main gear 6 is in meshing connection with the second gear 8, the main gear 6 is in meshing connection with the sub-gear 1113, after the annular sheet metal workpiece is expanded, the second telescopic rod 112 is first controlled to be stretched, so that the telescopic block 113 moves above the joint, the main gear 6 controls the second gear 8 to rotate, when the second support rod 31 approaches the outer periphery of the annular sheet metal workpiece, the main gear 6 controls the first rack plate 116 to move downward through the sub-gear 1113, so that the telescopic block 113 moves downward synchronously, so that the telescopic block 113 is inserted into the joint.

[0045] Referring to Figure 8 As shown in the drawings, the positioning assembly 11 further comprises a fourth gear 117 rotatably installed on the second telescopic rod 112, the arc-shaped groove 111 is provided with teeth in meshing connection with the fourth gear 117; and a second rack plate 118 slidably installed on the arc-shaped groove 111.

[0046] Referring to Figure 8 and Figure 9 As shown in the drawings, the positioning assembly 11 further comprises a resisting block 119 slidably installed on the arc-shaped groove 111, the resisting block 119 is located in the moving range of the second rack plate 118; a second spring 1110 installed between the second rack plate 118 and the arc-shaped groove 111; a push plate 1111 slidably installed on the telescopic block 113, the push plate 1111 is in sliding connection with the resisting block 119; a third telescopic rod 1112 installed on the arc-shaped block, the third telescopic rod 1112 is used for pushing the second rack plate 118 to move upward.

[0047] Specifically, the push plate 1111 adopts a telescopic structure to adapt to the telescoping of the second telescopic rod 112. In the initial state, the second spring 1110 is in a stretched state. When the telescopic block 113 moves upward, it pushes the push plate 1111 to move upward synchronously. The upward movement of the push plate 1111 causes the abutment plate to slide to the left and right sides until the abutment plate is not in contact with the second rack plate 118. At this time, the second rack plate 118 slides downward under the action of the elastic force of the second spring 1110 until the second rack plate 118 meshes with the fourth gear 117. The fourth gear 117 is restricted from moving by the second rack plate 118 and the upper teeth of the arc-shaped groove 111, so the second telescopic rod 112 cannot move synchronously, and thus the position of the second telescopic rod 112 on the arc-shaped groove 111 is restricted. By retracting the telescopic block 113 upward, the abutment block 119 is pushed away, and the second rack plate 118 quickly restricts the position of the second telescopic rod 112 under the elastic force of the second spring 1110, without the need to set additional devices to restrict the second telescopic rod 112, and the speed is fast, avoiding the displacement of the second telescopic rod 112 relative to the arc-shaped groove 111 after the telescopic block 113 is removed from the joint, and achieving more accuracy.

[0048] As shown in Figure 1 The body 1 adopts a telescopic structure, and contains two groups of the opening assembly 2, the folding assembly 3, and the pressing assembly 5. The first support rod 22 and the second support rod 31 of the two groups of the opening assembly 2 and the folding assembly 3 respectively adopt a plug-in structure.

[0049] Specifically, by setting two groups of the opening assembly 2, the folding assembly 3, and the pressing assembly 5, the other end of the first support rod 22 and the second support rod 31 has a receiving function, which reduces the probability of breaking of the first support rod 22 and the second support rod 31, and prolongs the service life of the device.

[0050] Working principle: control the expansion of the body 1. In the expansion process, the first support rod 22 and the second support rod 31 are divided into two halves, and then the annular sheet metal workpiece is inserted between the first support rod 22 and the second support rod 31 (the joint faces upward), the main gear 6 is controlled to rotate, driving the second ring 23 to rotate clockwise (so that the first ring 23 is in contact with the second ring 23), and then the first ring 23 is controlled to rotate counterclockwise (so that the first ring 23 is in contact with the second ring 23). Figure 4the first arc-shaped block 24, so that the first supporting rod 22 connected therewith moves in a direction away from each other, i.e. the first supporting rod 22 expands outward, until the two sides of the annular sheet metal workpiece are separated, when the first gear 7 rotates, the gap 10 rotates synchronously, so that the distance between the third gear 9 and one side of the gap 10 decreases, at the same time, the second telescopic rod 112 is controlled to extend, so that the telescopic block 113 is located above the joint, the second disc 51 is controlled to slide towards the annular sheet metal workpiece, the pressing structure 54 is driven to move synchronously, and the pressing structure 54 is controlled to move up and down, until the two pressing plates 542 of the pressing structure 54 are located outside and inside the joint of the sheet metal workpiece respectively, then the main gear 6 is controlled to move towards the second gear 8, so that the second gear 8 rotates counterclockwise, the first gear 7 is stationary, the rotation of the second gear 8 drives the third circular ring 33 to rotate synchronously, the counterclockwise rotation of the third circular ring 33 causes the second arc-shaped block 34 to move, and the short rod 32 connected therewith moves in a direction close to each other, so that the connecting plate 35 and the second supporting rod 31 move synchronously, i.e. the second supporting rod 31 is folded, the rotation of the third circular ring 33 drives the third gear 9 to rotate synchronously, when the third gear 9 rotates to contact one side of the gap 10, the first gear 7 is driven to rotate synchronously, at this time, the first supporting rod 22 and the second supporting rod 31 clamp the annular sheet metal workpiece, after the first gear 7 rotates together with the second gear 8, the first supporting rod 22 is folded, and the second supporting rod 31 pushes the annular sheet metal workpiece to fold, so that the two sides of the sheet metal workpiece are close to each other, at the same time, the two pressing plates 542 are controlled to move in a direction close to each other, so that the sheet metal workpiece containing the curled edge is pressed, so that the joint of the sheet metal workpiece is aligned, when the main gear 6 controls the second gear 8 to rotate, and the second supporting rod 31 approaches the outer periphery of the annular sheet metal workpiece, the main gear 6 controls the first rack plate 116 to move downward through the secondary gear 1113, so that the telescopic block 113 moves downward synchronously, so that the telescopic block 113 is inserted into the joint, during the process of closing the two sides of the annular sheet metal workpiece, the telescopic block 113 is pushed by the two sides of the annular sheet metal workpiece, first slides in the arc-shaped groove 111, i.e. the second telescopic rod 112 and the telescopic block 113 rotate around the central axis of the first disc 21, at this time, the first spring 114 is deformed, until the two sides of the annular sheet metal workpiece contact the telescopic block 113, and the telescopic block 113 is squeezed by the two sides of the annular sheet metal workpiece, and then the telescopic block 113 is contracted upward, until the joint of the annular sheet metal workpiece is aligned, at this time, the position of the second telescopic rod 112 in the arc-shaped groove 111 is kept unchanged, the switch 115 is controlled to slide downward, until it is located in the movement range of the second telescopic rod 112, then the first disc 21 is controlled to rotate, driving the first supporting rod 22 and the second supporting rod 31 to rotate synchronously, driving the annular sheet metal workpiece, the second telescopic rod 112 and the telescopic block 113 to rotate synchronously, until the second telescopic rod 112 rotates vertically upward, at this time, the second telescopic rod 112 can trigger the switch 115, after the switch 115 is triggered, the welding gun 42 is controlled to slide on the sliding groove 41,The welding of the butt joint is carried out while sliding, when the welding gun 42 is close to the pressing plate 542 and the telescopic block 113, the pressing structure 54 is controlled to release the metal sheet workpiece, then the second disc 51 and the second telescopic rod 112 are controlled to move away from the metal sheet workpiece, driving the pressing structure 54 and the telescopic block 113 to move away synchronously, then the welding gun 42 is controlled to continue welding the remaining position of the butt joint, after the welding is completed, the first supporting rod 22 and the second supporting rod 31 are controlled to release the metal sheet workpiece, that is, the welding action of the metal sheet workpiece is completed.

[0051] Obviously, the above embodiments are only examples for clearly illustrating the present application and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments cannot be enumerated, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. An automatic welding device for welding sheet metal workpieces, comprising a body (1), a spreading assembly (2), a retracting assembly (3), and a welding assembly (4), wherein the spreading assembly (2) comprises a first disc (21) and a plurality of first support rods (22) mounted on the body (1), the first support rods (22) being slidably connected to the first disc (21), the retracting assembly (3) comprising a plurality of second support rods (31), and the welding assembly (4) comprising a slide groove (41) slidably mounted on the body (1), wherein a welding torch (42) is slidably mounted in the slide groove (41), characterized in that, It also includes a pressing assembly (5) for pressing the annular sheet metal workpiece. The pressing assembly (5) includes: a second disc (51) slidably mounted on the first disc (21), the first support rod (22) and the second support rod (31) both passing through the second disc (51) and slidably connected to the second disc (51); a first ring (52) mounted on the periphery of the second disc (51); and a slider (53) slidably mounted on the first ring (52). A pressing structure (54) is inserted into the slider (53). The pressing structure (54) includes two connecting blocks (541) and two pressure plates (542). The pressure plates (542) are slidably connected to the connecting blocks (541). The two pressure plates (542) are used to press the outer and inner circumferences of the annular sheet metal workpiece, respectively. The spreading component (2) further includes a second ring (23) rotatably mounted on the outside of the first disc (21) and a first arc block (24) that drives the first support rod (22) to slide. The two ends of the first arc block (24) are rotatably connected to the second ring (23) and the first support rod (22) respectively. The closing component (3) includes a short rod (32) rotatably mounted on the first disc (21), a third ring (33) rotatably mounted on the first disc (21), and a second arc block (34) that drives the short rod (32) to slide. The two ends of the second arc block (34) are rotatably connected to the third ring (33) and the short rod (32) respectively. A connecting plate (35) is fixedly mounted on the short rod (32), and the second support rod (31) is mounted on the connecting plate (35). The device further includes: a main gear (6) slidably mounted on the first disc (21); a first gear (7) and a second gear (8) respectively fixedly mounted on the second ring (23) and the third ring (33), the main gear (6) being slidably meshing with the first gear (7) and the second gear (8) respectively; a third gear (9) rotatably mounted on the first disc (21), the third ring (33) meshing with the third gear (9); and a notch (10) opened on the first gear (7), the third gear (9) being inserted into the notch (10).

2. The automatic welding device for welding sheet metal workpieces according to claim 1, characterized in that: The first ring (52) is rotatably connected to the second disk (51). The first ring (52) contains several pressing structures (54) and sliders (53). A telescopic plate (55) is slidably installed on the second disk (51). The telescopic plate (55) is used to clamp the pressing structure (54).

3. An automatic welding device for welding sheet metal workpieces according to claim 2, characterized in that: The retractable assembly (3) also includes a first telescopic rod (36) fixedly installed on the connecting plate (35), a second support rod (31) slidably connected to the connecting plate (35), and the movable end of the first telescopic rod (36) fixedly connected to the second support rod (31).

4. An automatic welding device for welding sheet metal workpieces according to claim 3, characterized in that: The first disc (21) is rotatably connected to the body (1). The device also includes a positioning component (11), which includes: an arc groove (111) that slides up and down on the first disc (21); a second telescopic rod (112) that is rotatably installed on the arc groove (111); a telescopic block (113) that is fixedly installed on the second telescopic rod (112), the lower end of the telescopic block (113) having a triangular structure; a first spring (114) installed in the arc groove (111); and a switch (115) that slides up and down on the slide groove (41). When the second telescopic rod (112) rotates to a vertical position, the switch (115) can be triggered. After the switch (115) is triggered, it can control the welding torch (42) to work.

5. An automatic welding device for welding sheet metal workpieces according to claim 4, characterized in that: The positioning component (11) also includes a first rack plate (116) fixedly installed below the arc groove (111); and a secondary gear (1113) rotatably installed on the first disc (21), wherein the first rack plate (116) meshes with the secondary gear (1113).

6. An automatic welding device for welding sheet metal workpieces according to claim 5, characterized in that: The positioning component (11) further includes: a fourth gear (117) rotatably mounted on the second telescopic rod (112), the arc groove (111) having teeth that mesh with the fourth gear (117); and a second rack plate (118) slidably mounted on the arc groove (111).

7. An automatic welding device for welding sheet metal workpieces according to claim 6, characterized in that: The positioning component (11) further includes: a stop block (119) slidably mounted on the arc groove (111), the stop block (119) being located within the movement range of the second rack plate (118); a second spring (1110) mounted between the second rack plate (118) and the arc groove (111); a push plate (1111) slidably mounted on the telescopic block (113), the push plate (1111) being slidably connected to the stop block (119); and a third telescopic rod (1112) mounted on the arc block, the third telescopic rod (1112) being used to push the second rack plate (118) upward.

8. An automatic welding device for welding sheet metal workpieces according to claim 7, characterized in that: The body (1) adopts a telescopic structure. The body (1) contains two sets of the spreading components (2), the closing components (3) and the pressing components (5). The first support rod (22) and the second support rod (31) of the two sets of spreading components (2) and closing components (3) adopt a plug-in structure.

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