Automatic welding device for welding sheet metal workpiece

Abstract

The invention relates to the field of welding, in particular to an automatic welding device for metal plate workpiece welding, which comprises a machine body, an opening assembly, a folding assembly and a welding assembly, the opening assembly comprises a first disc and a plurality of first supporting rods which are mounted on the machine body, and the first supporting rods are in sliding connection with the first disc; the folding assembly comprises a plurality of second supporting rods, the welding assembly comprises a sliding groove and a welding gun, the welding assembly further comprises a pressing assembly used for pressing the annular metal plate workpiece, the pressing assembly comprises a second disc installed on the first disc in a sliding mode, and the first supporting rods and the second supporting rods both penetrate through the second disc and are connected with the second disc in a sliding mode; the first circular ring is mounted on the periphery of the second disc; the sliding block is installed on the first circular ring in a sliding mode, and a pressing structure is inserted into the sliding block; by arranging the pressing assembly, during welding, the seams of the metal plate workpieces are pressed, so that the warped edges of the metal plate workpieces are pressed, the seams of the metal plate workpieces are aligned, and the welding effect after welding is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of welding, in particular to an automatic welding device for welding sheet metal workpieces. Background Art

[0002] Sheet metal is a process for processing thin metal plates, including cold processing methods such as shearing, bending and splicing. Sheet metal workpieces are products processed through sheet metal processes, including metal sheets that have been bent in a ring shape and welded by welding devices. They can be processed into ring plates or conical plates, etc.

[0003] A patent application with publication number CN116000628A discloses a welding device for sheet metal workpieces, including a frame, and also includes: a linear drive mechanism installed on the frame; an expansion mechanism for supporting the sheet metal workpiece; a gathering mechanism for gathering and positioning the sheet metal workpiece; and a welding assembly arranged on the gathering mechanism. The present invention expands the bent sheet metal workpiece through the expansion mechanism, and then gathers the plate through the gathering mechanism until the seams of the sheet metal workpieces are aligned, and then welds the seams of the sheet metal workpieces through the welding assembly, and a conical plate can be obtained after welding.

[0004] After the sheet metal workpiece is circularly bent by a bending device, there is warping at the joint of the sheet metal workpiece. The folding component of the above scheme is composed of a plurality of arc-shaped plates. During welding, the arc-shaped plates do not contact the joint of the sheet metal workpiece, so the warping cannot be processed, resulting in poor welding effect. Summary of the invention

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

[0006] To solve the above technical problems, the present invention provides an automatic welding device for sheet metal workpiece welding, comprising a body, a spreading assembly, a folding assembly and a welding assembly, the spreading assembly comprising a No. 1 disc and a plurality of No. 1 support rods mounted on the body, the No. 1 support rods being slidably connected to the No. 1 disc, the folding assembly comprising a plurality of No. 2 support rods, the welding assembly comprising a slide groove slidably mounted on the body up and down, a welding gun being slidably mounted in the slide groove, and also comprising a pressing assembly for pressing the annular sheet metal workpiece, the pressing assembly comprising: a No. 2 disc slidably mounted on the No. 1 disc, the No. 1 support rod and the No. 2 support rod both passing through the No. 2 disc and being slidably connected to the No. 2 disc; a No. 1 ring mounted on the periphery of the No. 2 disc; a slider slidably mounted on the No. 1 ring, a pressing structure being plugged into the slider, the pressing structure comprising two connecting blocks and two pressing plates, the pressing plates being slidably connected to the connecting blocks, and the two pressing plates being respectively used for pressing the outer periphery and inner periphery of the annular sheet metal workpiece.

[0007] In one embodiment of the present invention, the No. 1 circular ring is rotatably connected to the No. 2 circular disk, the No. 1 circular ring contains a plurality of the pressing structures and sliders, and the No. 2 circular disk is slidably provided with a telescopic plate, which is used to clamp the pressing structure.

[0008] In one embodiment of the present invention, the expansion assembly also includes a No. 2 circular ring rotatably mounted on the outer side of the No. 1 circular disc and a No. 1 arc block driving the No. 1 support rod to slide, and the two ends of the No. 1 arc block are respectively rotatably connected to the No. 2 circular ring and the No. 1 support rod, and the folding assembly includes a short rod slidably mounted on the No. 1 circular disc, a No. 3 circular ring rotatably mounted on the No. 1 circular disc and a No. 2 arc block driving the short rod to slide, and the two ends of the No. 2 arc block are respectively rotatably connected to the No. 3 circular ring and the short rod, a connecting plate is fixedly mounted on the short rod, and the No. 2 support rod is mounted on the connecting plate.

[0009] In one embodiment of the present invention, the device also includes: a main gear slidably mounted on the No. 1 disc; a No. 1 gear and a No. 2 gear fixedly mounted on the No. 2 ring and the No. 3 ring respectively, the main gear slidingly meshing with the No. 1 gear and the No. 2 gear respectively; a No. 3 gear rotatably mounted on the No. 1 disc, the No. 3 ring meshingly connected with the No. 3 gear; a notch on the No. 1 gear, the No. 3 gear being inserted into the notch.

[0010] In one embodiment of the present invention, the folding assembly also includes a No. 1 telescopic rod fixedly mounted on the connecting plate, the No. 2 support rod is slidably connected to the connecting plate, and the movable end of the No. 1 telescopic rod is fixedly connected to the No. 2 support rod.

[0011] In one embodiment of the present invention, the No. 1 disc is rotatably connected to the body, and the device also includes a positioning assembly, which includes: an arc-shaped groove slidably installed on the No. 1 disc; a No. 2 telescopic rod rotatably installed on the arc-shaped groove; a telescopic block fixedly installed on the No. 2 telescopic rod, and the lower end of the telescopic block adopts a triangular structure; a No. 1 spring installed in the arc-shaped groove; a switch slidably installed on the slide groove, and the switch can be triggered when the No. 2 telescopic rod is rotated to be vertically upward, and the switch can control the operation of the welding gun after being triggered.

[0012] In one embodiment of the present invention, the positioning assembly also includes a No. 1 rack plate fixedly installed below the arc groove; a secondary gear rotatably installed on the No. 1 disc, and the No. 1 rack plate is meshingly connected with the secondary gear.

[0013] In one embodiment of the present invention, the positioning assembly further includes: a fourth gear rotatably mounted on the second telescopic rod, the arc groove being provided with teeth meshing with the fourth gear; and a second rack plate slidably mounted on the arc groove.

[0014] In one embodiment of the present invention, the positioning assembly also includes: a stop block slidably mounted on the arc groove, the stop block is located within the moving range of the No. 2 rack plate; a No. 2 spring mounted between the No. 2 rack plate and the arc groove; a push plate slidably mounted on the telescopic block up and down, the push plate being slidably connected to the stop block; and a No. 3 telescopic rod mounted on the arc block, the No. 3 telescopic rod being used to push the No. 2 rack plate to move upward.

[0015] In one embodiment of the present invention, the body adopts a telescopic structure, and the body contains two groups of the expansion components, the folding components and the pressing components. The first support rod and the second support rod of the two groups of the expansion components and the folding components respectively adopt a plug-in structure.

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

[0017] 1. The automatic welding device for sheet metal workpiece welding described in the present invention is provided with a pressing component. During welding, the joints of the sheet metal workpieces are pressed to press the warped edges of the sheet metal workpieces, so that the joints of the sheet metal workpieces are aligned, thereby ensuring the welding effect after welding.

[0018] 2. The automatic welding device for sheet metal workpiece welding described in the present invention, by setting a positioning component, adjusts the position of the seam after the two sides of the annular sheet metal workpiece are aligned until the seam is aligned with the welding gun to ensure the welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0020] Figure 1 is a three-dimensional diagram of the body of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the second disc and the pressing structure of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the third ring and the third gear of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the first arc block and the second arc block of the present invention;

[0024] Figure 5 It is a schematic diagram of the position of the notch of the present invention;

[0025] Figure 6 It is a structural schematic diagram of the No. 1 disc of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the arc groove of the present invention;

[0027] Figure 8 yes Figure 6 A partial enlarged view of the middle part;

[0028] Fig. 9 It is a structural schematic diagram of the push plate and the stop block of the present invention;

[0029] Description of the reference numerals in the drawings in the specification: 1. machine body; 2. opening assembly; 21. disc No. 1; 22. support rod No. 1; 23. ring No. 2; 24. arc block No. 1; 3. folding assembly; 31. support rod No. 2; 32. short rod; 33. ring No. 3; 34. arc block No. 2; 35. connecting plate; 36. telescopic rod No. 1; 4. welding assembly; 41. slide; 42. welding gun; 5. pressing assembly; 51. disc No. 2; 52. ring No. 1; 53. slider; 54. pressing structure; 541. connecting Block; 542, pressure plate; 55, telescopic plate; 6, main gear; 7, gear No. 1; 8, gear No. 2; 9, gear No. 3; 10, notch; 11, positioning assembly; 111, arc groove; 112, telescopic rod No. 2; 113, telescopic block; 114, spring No. 1; 115, switch; 116, rack plate No. 1; 117, gear No. 4; 118, rack plate No. 2; 119, block; 1110, spring No. 2; 1111, push plate; 1112, telescopic rod No. 3; 1113, secondary gear. DETAILED DESCRIPTION

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

[0031] Reference Figure 1-Figure 9 As shown, an automatic welding device for sheet metal workpiece welding of the present invention comprises a body 1, an opening assembly 2, a closing assembly 3 and a welding assembly 4, wherein the opening assembly 2 comprises a No. 1 disc 21 and a plurality of No. 1 support rods 22 mounted on the body 1, wherein the No. 1 support rods 22 are slidably connected to the No. 1 disc 21, the closing assembly 3 comprises a plurality of No. 2 support rods 31, the welding assembly 4 comprises a slide groove 41 slidably mounted on the body 1, a welding gun 42 is slidably mounted in the slide groove 41, and a pressing assembly 5 for pressing the annular sheet metal workpiece is further comprised, wherein the pressing assembly 5 comprises : A No. 2 disc 51 is slidably mounted on the No. 1 disc 21, and the No. 1 support rod 22 and the No. 2 support rod 31 both penetrate the No. 2 disc 51 and are slidably connected to the No. 2 disc 51; a No. 1 ring 52 is mounted on the periphery of the No. 2 disc 51; a slider 53 is slidably mounted on the No. 1 ring 52, and a pressing structure 54 is inserted on the slider 53, and the pressing structure 54 includes two connecting blocks 541 and two pressing plates 542, and the pressing plates 542 are slidably connected to the connecting blocks 541, and the two pressing plates 542 are respectively used to press the outer periphery and inner periphery of the annular sheet metal workpiece.

[0032] Specifically, after the sheet metal workpiece is circularly bent by the bending device, warping occurs at the joints of the sheet metal workpiece. The folding assembly 3 is composed of a plurality of No. 2 support rods 31. During welding, the No. 2 support rods 31 do not contact the joints of the sheet metal workpiece, so the warping cannot be processed, resulting in poor welding effect. The welding gun 42 adopts a gas welding gun, and welding is performed by the heat generated by the combustion of combustible gas. When in use, the annular sheet metal workpiece is inserted into the periphery of the No. 1 support rod 22 and is located at the No. 2 support rod. The first support rod 22 is then controlled to expand outwards until the two sides of the annular sheet metal workpiece are separated, and the second support rod 31 is then controlled to contract inwards until the second support 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 support rod 31 and the first support rod 22, and the second disc 51 is then controlled to slide in the direction close to the annular sheet metal workpiece, driving the pressing structure 54 to move synchronously, and at the same time controlling the pressing structure 54 to move up and down until the pressing structure 54 is The two pressing plates 542 are respectively located at the outer side and the inner side of the joint of the sheet metal workpiece. Then, the second support rod 31 and the first support rod 22 are controlled to be retracted, 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 the direction of approaching each other, so that the sheet metal workpiece with warped edges can be pressed to align the joints of the sheet metal workpiece. Then, the welding gun 42 is controlled to slide on the slide groove 41, and the joints are welded while sliding. 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 control the No. 2 disc 51 to move away from the sheet metal workpiece, driving the pressing structure 54 to move away synchronously, and then control the welding gun 42 to continue welding the remaining position of the joint. After welding, control the No. 1 support rod 22 and the No. 2 support rod 31 to release the sheet metal workpiece, that is, the welding action of the sheet metal workpiece is completed; by setting the pressing component 5, during welding, the joint of the sheet metal workpiece is pressed to press the warped edge of the sheet metal workpiece, so that the joint of the sheet metal workpiece is aligned, thereby ensuring the welding effect after welding.

[0033] Reference Figure 2 As shown, the first circular ring 52 is rotatably connected to the second circular disk 51 , the first circular ring 52 contains a plurality of pressing structures 54 and sliders 53 , and the second circular disk 51 is slidably mounted with a telescopic plate 55 , and the telescopic plate 55 is used to clamp the pressing structure 54 .

[0034] Specifically, the curvatures of the pressing plates 542542 of the pressing structures 54 are all different to accommodate annular sheet metal workpieces of different sizes. According to the annular sheet metal workpieces of different sizes, the No. 1 ring 52 is controlled to rotate so that the pressing structure 54 of the corresponding size is located directly above the telescopic plate 55, and the slider 53 is controlled to drive the pressing structure 54 to move downward, and then the telescopic plate 55 is controlled to clamp the two sides of the pressing structure 54, and the telescopic plate 55 is controlled to move downward. The slider 53 and the pressing structure 54 are plugged in, so the pressing structure 54 can be separated from the slider 53 after moving downward, and the telescopic plate 55 can drive the two pressing plates 542 of the pressing structure 54 to move to the height of the upper and lower sides of the joint; by setting a plurality of pressing structures 54, the device is more practical, and there is no need to replace the pressing structure 54 before each work, which is convenient to use.

[0035] Reference Figure 3-Figure 4 As shown, the expansion component 2 also includes a No. 2 circular ring 23 rotatably mounted on the outer side of the No. 1 circular disk 21 and a No. 1 arc block 24 driving the No. 1 support rod 22 to slide, and the two ends of the No. 1 arc block 24 are respectively rotatably connected with the No. 2 circular ring 23 and the No. 1 support rod 22, and the folding component 3 includes a short rod 32 slidably mounted on the No. 1 circular disk 21, a No. 3 circular ring 33 rotatably mounted on the No. 1 circular disk 21 and a No. 2 arc block 34 driving the short rod 32 to slide, and the two ends of the No. 2 arc block 34 are respectively rotatably connected with the No. 3 circular ring 33 and the short rod 32, and a connecting plate 35 is fixedly mounted on the short rod 32, and the No. 2 support rod 31 is mounted on the connecting plate 35.

[0036] Specifically, during operation, the annular sheet metal workpiece is inserted between the first support rod 22 and the second support rod 31, and the second ring 23 is controlled to rotate clockwise (with Figure 4 Taking the perspective of as an example), the arc block No. 1 24 is driven to move, so that the support rod No. 1 22 connected thereto moves in the direction away from each other, that is, the support rod No. 1 22 expands outward until the two sides of the joint of the annular sheet metal workpiece are separated, thereby avoiding the problem of partial overlap of the two sides of the annular sheet metal workpiece. Subsequently, the ring No. 3 33 is controlled to rotate counterclockwise, so that the arc block No. 2 34 moves, and the short rod 32 connected thereto moves in the direction of approaching each other, so that the connecting plate 35 and the support rod No. 2 31 move synchronously, that is, the support rod No. 2 31 is retracted.

[0037] like Figure 3-Figure 5As shown, the device also includes: a main gear 6 slidably mounted on the No. 1 disc 21; a No. 1 gear 7 and a No. 2 gear 8 fixedly mounted on the No. 2 ring 23 and the No. 3 ring 33 respectively, and the main gear 6 can slide and mesh with the No. 1 gear 7 and the No. 2 gear 8 respectively; a No. 3 gear 9 rotatably mounted on the No. 1 disc 21, and the No. 3 ring 33 is meshed and connected with the No. 3 gear 9; a notch 10 is opened on the No. 1 gear 7, and the No. 3 gear 9 is inserted into the notch 10.

[0038] Specifically, in the initial state, the main gear 6 is meshed with the No. 1 gear 7. After the annular sheet metal workpiece is inserted into the No. 1 support rod 22 and the No. 2 support rod 31, the main gear 6 is controlled to rotate, so that the No. 1 gear 7 rotates clockwise, driving the No. 2 ring 23 to rotate synchronously, so that the No. 1 support rod 22 expands outward until the two sides of the joint of the annular sheet metal workpiece are separated. When the No. 1 gear 7 rotates, it drives the notch 10 to rotate synchronously, so that the distance between the No. 3 gear 9 and one side of the notch 10 is reduced, and then the main gear 6 is controlled to move in the direction close to the No. 2 gear 8, so that the No. 2 gear 8 rotates counterclockwise, and the No. 1 gear 7 does not move. The rotation of the No. 2 gear 8 drives the No. 3 ring 33 to rotate synchronously, and the rotation of the No. 3 ring 33 drives the No. 3 gear 9 to rotate synchronously. When the No. 3 gear 9 rotates to contact one side of the notch 10, it can drive the No. 1 gear 7 to rotate synchronously. When the first gear 7 rotates with the second gear 8, the first support rod 22 is retracted, and the second support rod 31 pushes the annular sheet metal workpiece to be retracted, so that the two sides of the sheet metal workpiece are close to each other; since the angle of the notch 10 remains unchanged, which is a, when the first support rod 22 expands, the first gear 7 rotates by an angle b, and the angle between the third gear 9 and one side of the notch 10 is ab. After the third ring 33 and the second gear 8 rotate by ab, the first support rod 22 and the second support rod 31 clamp the sheet metal workpiece in the middle, and then the third gear 9 can drive the first gear 7 and the first ring 52 to rotate, so that the first support rod 22 and the second support rod 31 are retracted together. Therefore, the device can adapt to annular sheet metal workpieces of different sizes under the same thickness, and is more practical.

[0039] Reference Figure 5 As shown, the folding assembly 3 also includes a No. 1 telescopic rod 36 fixedly mounted on the connecting plate 35 , the No. 2 support rod 31 is slidably connected to the connecting plate 35 , and the movable end of the No. 1 telescopic rod 36 is fixedly connected to the No. 2 support rod 31 .

[0040] Specifically, by controlling the extension and retraction of the No. 1 telescopic rod 36, the No. 2 support rod 31 can be driven to slide on the connecting plate 35 to control the initial distance between the No. 1 telescopic rod 36 and the No. 2 telescopic rod 112, so that the device can adapt to annular sheet metal workpieces of different thicknesses and is more practical.

[0041] Reference Figure 1 , Figure 4 and Figure 8 As shown, the No. 1 disc 21 is rotatably connected to the body 1, and the device also includes a positioning assembly 11, which includes: an arc groove 111 slidably installed on the No. 1 disc 21 up and down; a No. 2 telescopic rod 112 rotatably installed on the arc groove 111; a telescopic block 113 fixedly installed on the No. 2 telescopic rod 112, and the lower end of the telescopic block 113 adopts a triangular structure; a No. 1 spring 114 installed in the arc groove 111; a switch 115 slidably installed on the slide groove 41 up and down, when the No. 2 telescopic rod 112 rotates to vertically upward, the switch 115 can be triggered, and after the switch 115 is triggered, the welding gun 42 can be controlled to work.

[0042] Specifically, the existing device cannot adjust the position of the seam after the annular sheet metal workpiece is folded. Therefore, during welding, the welding gun 42 is not aligned with the seam, which affects the welding effect. The telescopic block 113 adopts a spring-controlled telescopic structure. The spring force inside the telescopic block 113 is greater than the spring force of the No. 1 spring 114. Before working, the seam of the annular sheet metal workpiece is placed upward (no need for special precision). After the No. 1 support rod 22 expands outward, the two sides of the annular sheet metal workpiece are separated, and an opening is generated in the middle. The second telescopic rod 112 extends toward the direction of the annular sheet metal workpiece, driving the telescopic block 113 to move synchronously until the telescopic block 113 is inserted into the joint, and then the second support rod 31 is controlled to retract inward, driving the two sides of the annular sheet metal workpiece to move closer to each other. During the process of moving closer, the telescopic block 113 is pushed by the two sides of the annular sheet metal workpiece and first slides in the arc groove 111, that is, 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 both sides of the annular sheet metal workpiece are in contact with the telescopic block 113, the telescopic block 113 is squeezed by the two sides of the annular sheet metal workpiece, and the telescopic block 113 shrinks upward until the seams of the annular sheet metal workpiece are aligned. At this time, the position of the second telescopic rod 112 in the arc groove 111 remains unchanged, and the control switch 115 slides downward until it is within the moving 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 and the second telescopic rod 112 to rotate synchronously. 12 and the telescopic block 113 rotate synchronously until the second telescopic rod 112 rotates 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 and weld the seam. When approaching the telescopic block 113, the pressing structure 54 and the telescopic block 113 are controlled to synchronously move away from the annular sheet metal workpiece; by setting the positioning component 11, after the two sides of the annular sheet metal workpiece are aligned, the position of the seam is adjusted until the seam is aligned with the welding gun 42 to ensure the welding effect.

[0043] Reference Figure 4 As shown, the positioning assembly 11 also includes a No. 1 rack plate 116 fixedly mounted below the arc groove 111 ; a sub-gear 1113 rotatably mounted on the No. 1 disc 21 , and the No. 1 rack plate 116 is meshedly connected with the sub-gear 1113 .

[0044] Specifically, in the initial state, the sub-gear 1113 is not engaged with the main gear 6. After the main gear 6 is engaged with the second gear 8, the main gear 6 is engaged with the sub-gear 1113. After the annular sheet metal workpiece expands, the second telescopic rod 112 is first controlled to extend so that the telescopic block 113 moves to the top of the joint. When the main gear 6 controls the second gear 8 to rotate and 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 and the telescopic block 113 is inserted into the joint.

[0045] Reference Figure 8 As shown, the positioning assembly 11 also includes: a fourth gear 117 rotatably mounted on the second telescopic rod 112, and the arc groove 111 is provided with teeth meshing with the fourth gear 117; and a second rack plate 118 slidably mounted on the arc groove 111.

[0046] Reference Figure 8 and Fig. 9 As shown, the positioning assembly 11 also includes: a stop block 119 slidably mounted on the arc groove 111, the stop block 119 is located within the moving range of the No. 2 rack plate 118; a No. 2 spring 1110 installed between the No. 2 rack plate 118 and the arc groove 111; a push plate 1111 slidably mounted on the telescopic block 113 up and down, the push plate 1111 is slidably connected to the stop block 119; a No. 3 telescopic rod 1112 installed on the arc block, the No. 3 telescopic rod 1112 is used to push the No. 2 rack plate 118 to move upward.

[0047] Specifically, the push plate 1111 adopts a telescopic structure to adapt to the extension and retraction 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, the push plate 1111 is pushed to move upward synchronously. The push plate 1111 moves upward, causing 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 elastic force of the second spring 1110 until the second rack plate 118 is meshed with the fourth gear 117. The fourth gear 117 is affected by the second rack plate 118. The second telescopic rod 112 is immovable due to the restriction of the teeth on the arc groove 111, so the position of the second telescopic rod 112 on the arc groove 111 is restricted; the push block 119 is pushed away by the upward contraction of the telescopic block 113, and the second rack plate 118 quickly limits the position of the second telescopic rod 112 under the action of the elastic force of the second spring 1110, without setting up an additional device to limit the second telescopic rod 112, and the speed is fast, which avoids the displacement of the second telescopic rod 112 relative to the arc groove 111 after the telescopic block 113 moves out of the joint, and is more accurate.

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

[0049] Specifically, by providing two sets of spreading components 2, folding components 3 and pressing components 5, the other ends of the No. 1 support rod 22 and the No. 2 support rod 31 are connected, which reduces the probability of the No. 1 support rod 22 and the No. 2 support rod 31 breaking and prolongs the service life of the device.

[0050] Working principle: Control the extension of the machine body 1. During the extension process, the No. 1 support rod 22 and the No. 2 support rod 31 are separated into two halves. Then the annular sheet metal workpiece is inserted between the No. 1 support rod 22 and the No. 2 support rod 31 (with the seam facing upwards), and the main gear 6 is controlled to rotate, driving the No. 2 ring 23 to rotate clockwise (with the seam facing upwards). Figure 4As an example, the first arc block 24 is driven to move, so that the first support rod 22 connected thereto moves in the direction away from each other, that is, the first support rod 22 expands outward until the two sides of the annular sheet metal workpiece are separated. When the first gear 7 rotates, the notch 10 is driven to rotate synchronously, so that the distance between the third gear 9 and one side of the notch 10 is reduced. At the same time, the second telescopic rod 112 is controlled to extend so that the telescopic block 113 is located above the joint, and the second disc 51 is controlled to slide in the direction close to the annular sheet metal workpiece, driving the pressing structure 54 to move synchronously, and at the same time controlling the pressing structure 54 to move up and down until the two pressing plates 542 of the pressing structure 54 are respectively located on the outside and inside of the joint of the sheet metal workpiece, and then the main gear 6 is controlled to move close to the second gear 8. The third ring 33 rotates in the counterclockwise direction, causing the second gear 8 to rotate counterclockwise, while the first gear 7 remains stationary. The second gear 8 rotates to drive the third ring 33 to rotate synchronously. The third ring 33 rotates counterclockwise, causing the second arc block 34 to move, and the short rod 32 connected thereto moves in the direction of approaching each other, causing the connecting plate 35 and the second support rod 31 to move synchronously, that is, the second support rod 31 is retracted, and the third ring 33 rotates to drive 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 with the second gear 8, the first support rod 22 is retracted, and the second support rod 31 pushes the annular sheet metal workpiece to retract. The two sides of the sheet metal workpiece are brought closer to each other, and at the same time, the two pressure plates 542 are controlled to move in the direction of approaching each other, so that the sheet metal workpiece with warped edges can be pressed to align the joints of the sheet metal workpieces. When the main gear 6 controls the second gear 8 to rotate and 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. In the process of the two sides of the annular sheet metal workpiece approaching each other, the telescopic block 113 is pushed by the two sides of the annular sheet metal workpiece, and first slides in the arc groove 111, that is, the second telescopic rod 112 and the telescopic block 113 rotate around the central axis of the first disk 21. At this time, the first spring 114 produces The second telescopic rod 112 is then controlled to remain in the arc groove 111, and the switch 115 is controlled to slide downward until it is within the moving range of the second telescopic rod 112. Subsequently, 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 rotates to face 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 slide groove 41.While sliding, the seam is welded. When the welding gun 42 approaches the pressing plate 542 and the telescopic block 113, the pressing structure 54 is controlled to release the sheet metal workpiece, and then the second disc 51 and the second telescopic rod 112 are controlled to move away from the sheet metal 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 seam. After the welding is completed, the first support rod 22 and the second support rod 31 are controlled to release the sheet metal workpiece, and the welding action of the sheet metal workpiece is completed.

[0051] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. An automatic welding device for welding sheet metal workpieces, comprising a body (1), an opening assembly (2), a closing assembly (3) and a welding assembly (4), wherein the opening assembly (2) comprises a No. 1 disc (21) and a plurality of No. 1 support rods (22) mounted on the body (1), wherein the No. 1 support rods (22) are slidably connected to the No. 1 disc (21), the closing assembly (3) comprises a plurality of No. 2 support rods (31), and the welding assembly (4) comprises a slide groove (41) slidably mounted on the body (1), wherein a welding gun (42) is slidably mounted in the slide groove (41), wherein the welding gun (42) is slidably mounted in the slide groove (41), and wherein the ... It also includes a pressing component (5) for pressing an annular sheet metal workpiece, the pressing component (5) including: a No. 2 disc (51) slidably mounted on the No. 1 disc (21), the No. 1 support rod (22) and the No. 2 support rod (31) both passing through the No. 2 disc (51) and being slidably connected to the No. 2 disc (51); a No. 1 ring (52) mounted on the periphery of the No. 2 disc (51); a slider (53) slidably mounted on the No. 1 ring (52), the slider (53) being plugged with a pressing structure (54), the pressing structure (54) including two connecting blocks (541) and two pressing plates (542), the pressing plates (542) being slidably connected to the connecting blocks (541), the two pressing plates (542) being used to press the outer circumference and inner circumference of the annular sheet metal workpiece, respectively.

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

3. The automatic welding device for sheet metal workpiece welding according to claim 2, characterized in that: The spreading assembly (2) further comprises a second circular ring (23) rotatably mounted on the outer side of the first circular disc (21) and a first arc block (24) driving the first support rod (22) to slide, and the two ends of the first arc block (24) are rotatably connected to the second circular ring (23) and the first support rod (22) respectively. The folding assembly (3) comprises a short rod (32) slidably mounted on the first circular disc (21), a third circular ring (33) rotatably mounted on the first circular disc (21) and a second arc block (34) driving the short rod (32) to slide, and the two ends of the second arc block (34) are rotatably connected to the third circular 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).

4. The automatic welding device for sheet metal workpiece welding according to claim 3, characterized in that: The device further comprises: a main gear (6) slidably 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, wherein the main gear (6) can be slidably meshed with the first gear (7) and the second gear (8), respectively; a third gear (9) rotatably mounted on the first disc (21), wherein the third ring (33) is meshedly connected with the third gear (9); and a notch (10) is provided on the first gear (7), wherein the third gear (9) is inserted into the notch (10).

5. The automatic welding device for sheet metal workpiece welding according to claim 4, characterized in that: The folding assembly (3) further comprises a first telescopic rod (36) fixedly mounted on the connecting plate (35), the second support rod (31) is slidably connected to the connecting plate (35), and the movable end of the first telescopic rod (36) is fixedly connected to the second support rod (31).

6. The automatic welding device for sheet metal workpiece welding according to claim 5, characterized in that: The first disc (21) is rotatably connected to the body (1). The device also includes a positioning assembly (11), which includes: an arc groove (111) slidably mounted on the first disc (21) up and down; a second telescopic rod (112) rotatably mounted on the arc groove (111); a telescopic block (113) fixedly mounted on the second telescopic rod (112), the lower end of the telescopic block (113) adopts a triangular structure; a first spring (114) mounted in the arc groove (111); and a switch (115) slidably mounted on the slide groove (41) up and down, and when the second telescopic rod (112) rotates to be vertically upward, the switch (115) can be triggered, and after the switch (115) is triggered, the welding gun (42) can be controlled to work.

7. The automatic welding device for sheet metal workpiece welding according to claim 6, characterized in that: The positioning assembly (11) further comprises a first rack plate (116) fixedly mounted below the arc-shaped groove (111); a secondary gear (1113) rotatably mounted on the first disc (21), the first rack plate (116) being meshingly connected with the secondary gear (1113).

8. The automatic welding device for sheet metal workpiece welding according to claim 7, characterized in that: The positioning assembly (11) further comprises: a fourth gear (117) rotatably mounted on the second telescopic rod (112), the arc groove (111) being provided with teeth meshing with the fourth gear (117); and a second rack plate (118) slidably mounted on the arc groove (111) up and down.

9. The automatic welding device for sheet metal workpiece welding according to claim 8, characterized in that: The positioning assembly (11) also includes: a stopper (119) slidably mounted on the arc groove (111), the stopper (119) being located within the moving 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) up and down, the push plate (1111) being slidably connected to the stopper (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) to move upward.

10. The automatic welding device for sheet metal workpiece welding according to claim 9, characterized in that: The machine body (1) adopts a telescopic structure, and contains two groups of the spreading components (2), the folding components (3) and the pressing components (5) on the machine body (1), and the first support rod (22) and the second support rod (31) of the two groups of the spreading components (2) and the folding components (3) respectively adopt a plug-in structure.

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