Welding device for automobile plate type stamping part

Abstract

The invention provides a welding device for automobile plate type stamping parts. The welding device comprises a welding assembly, and the welding assembly comprises a supporting table, a supporting frame and an ejection mechanism; according to the clamping device, an output shaft of a servo motor drives a gear to rotate on one outer gear ring, one outer gear ring drives a corresponding annular plate body to rotate, and the annular plate body extrudes a corresponding fixing and positioning mechanism through a wave through hole to move and clamp an automobile plate type stamping part; a second hydraulic cylinder drives a square-shaped mounting plate, a servo motor, a gear and two limiting clamping teeth to move upwards, and when the gear moves on the other outer gear ring, the square-shaped mounting plate drives one limiting clamping tooth to be meshed with one outer gear ring so that the position of the corresponding annular plate body can be limited and fixed; and the gear drives the other outer gear ring to rotate, the operation is repeated to clamp the automobile plate type stamping parts, the automobile plate type stamping parts with different lengths and widths can be stably fixed, and the welding effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment accessories, and in particular to a welding device for automobile plate stamping parts. Background Art

[0002] Automotive sheet metal stampings are metal stampings that make up automotive parts. These stampings can be made directly through the stamping process, or they can be processed by welding, machining or painting after stamping. There are many types of automotive stampings, including but not limited to spring trays, spring seats, end caps, covers, compression valve covers, oil seal seats, bottom covers, dust covers, impellers, oil cylinders, lugs and brackets.

[0003] After searching, Chinese patent number CN219151999U discloses a welding device for automobile stamping parts, including a base; a workbench; a support column; a plurality of limit columns; a sliding block; a connecting rod; a support plate; and a lifting unit, which is used to drive the sliding block to move vertically and can drive the plurality of limit columns to move synchronously. The sliding block moves downward, thereby driving the floating ring to move downward, so that the hinge rod pulls the sliding seat to move toward the inner side of the workbench, thereby making the plurality of limit columns press against the side of the automobile stamping part lying flat on the top surface of the workbench, thereby limiting the welding process of the automobile stamping part. In addition, after the welding is completed, the sliding block moves upward, thereby making the support plate move upward, and can make the support plate lift up the automobile stamping part lying flat on the workbench, thereby facilitating the staff to take the automobile stamping part after welding from the workbench.

[0004] However, since the size of automobile plate stamping parts is not symmetrical, the length and width of automobile plate stamping parts are different, and multiple limit columns move synchronously or repel each other, it is impossible to stably fix the automobile plate stamping parts with inconsistent length and width. Only two of the limit columns fix the automobile plate stamping parts, which reduces the stability of the fixation of the automobile plate stamping parts, thereby reducing the welding effect. For this reason, a welding device for automobile plate stamping parts is proposed. Summary of the invention

[0005] In view of this, an embodiment of the present invention hopes to provide a welding device for automotive plate stamping parts to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0006] The technical solution of the embodiment of the present invention is implemented as follows: A welding device for automobile plate stamping parts includes a welding assembly, wherein the welding assembly includes a support platform, a support frame, an ejection mechanism, four fixed positioning mechanisms, a drive limiting mechanism and a welding mechanism, wherein the support frame is arranged on the upper surface of the support platform, and a control panel is arranged on the front surface of the support frame; four movable through holes are opened in a circular array on the upper surface of the support platform, and the four fixed positioning mechanisms are slidably connected to the inner walls corresponding to the movable through holes; the inner walls of the movable through holes are opened with installation grooves, and the four fixed positioning mechanisms are arranged on the inner walls corresponding to the installation grooves; the drive limiting mechanism is arranged on the outer wall of the support platform, and the drive limiting mechanism is fitted with the four fixed positioning mechanisms; the welding mechanism is arranged on the upper surface of the support platform, and the control panel is electrically connected to the ejection mechanism, the drive limiting mechanism and the welding mechanism through wires.

[0007] In some embodiments, the fixed positioning mechanism includes a clamping rod, a moving rod, a spring and a moving block, wherein the outer wall of the moving block is slidably connected to the inner wall of the movable through hole, and the bottom end of the clamping rod is arranged on the upper surface of the moving block; the top end of the moving rod is arranged on the lower surface of the moving block, and the moving rod is in contact with the drive limiting mechanism; one end of the spring is arranged on one side of the moving block, and the other end of the spring is arranged on the inner wall corresponding to the mounting groove.

[0008] In some embodiments, the drive limiting mechanism includes a U-shaped mounting plate, a second hydraulic cylinder, a U-shaped mounting plate, two annular plates, two external gear rings, a gear, a servo motor and two limiting teeth, wherein the U-shaped mounting plate is arranged on the outer wall of the support platform, and one side of the U-shaped mounting plate is slidably connected to the inner wall of the U-shaped mounting plate; the servo motor is arranged on the inner bottom wall of the U-shaped mounting plate, and the gear is arranged on the output shaft of the servo motor; an operating through hole is opened on one side of the U-shaped mounting plate, and the gear passes through the operating through hole; the adjacent sides of the two annular plates are rotatably connected, The upper surface of the uppermost annular plate body is rotatably connected to the lower surface of the support platform; the two outer toothed rings are arranged on the outer wall of the corresponding annular plate body, the two limit teeth are symmetrically arranged on one side of the U-shaped mounting plate, and the gear and the two limit teeth are meshed with the corresponding outer toothed rings; the second hydraulic cylinder is arranged on the lower surface of the U-shaped mounting plate, and the piston rod of the second hydraulic cylinder passes through the U-shaped mounting plate and is arranged on the lower surface of the U-shaped mounting plate; the inner wall of the annular plate body is provided with a wavy through hole, and the control panel is electrically connected to the second hydraulic cylinder and the servo motor respectively through wires.

[0009] In some embodiments, the ejection mechanism includes an ejection plate, a movable block and a first hydraulic cylinder, wherein a movable through groove is opened on the upper surface of the support platform, and the outer wall of the movable block is slidably connected to the inner wall of the movable through groove; the first hydraulic cylinder is arranged on the lower surface of the support platform, and the piston rod of the first hydraulic cylinder passes through the support platform and is arranged on the lower surface of the movable block; the movable block is arranged on the lower surface of the ejection plate, and the control panel is electrically connected to the first hydraulic cylinder through wires.

[0010] In some embodiments, a rubber sleeve is provided on the outer wall of the clamping rod.

[0011] In some embodiments, the outer wall of the moving rod is evenly embedded with steel balls.

[0012] In some embodiments, the inner wall of the U-shaped mounting plate is evenly provided with a first sliding groove, and the other side of the U-shaped mounting plate is evenly provided with a first sliding block, and the outer wall of the first sliding block is slidably connected to the inner wall of the first sliding groove.

[0013] In some embodiments, the inner wall of the movable through hole is symmetrically provided with a second sliding groove, the outer wall of the moving block is symmetrically provided with a second sliding block, and the outer wall of the second sliding block is slidably connected to the inner wall of the second sliding groove.

[0014] In some embodiments, the inner wall of the movable through groove is evenly provided with a third sliding groove, the outer wall of the movable block is evenly provided with a third sliding block, and the outer wall of the third sliding block is slidably connected to the inner wall of the third sliding groove.

[0015] The embodiment of the present invention has the following advantages due to the adoption of the above technical solution:

[0016] 1. The present invention drives the gear on one of the outer gear rings to rotate through the output shaft of the servo motor, and one of the outer gear rings drives the corresponding annular plate to rotate, and the annular plate squeezes the corresponding fixed positioning mechanism through the wave through hole to move and clamp the automobile plate-type stamping parts, and then drives the square-shaped mounting plate to move upward through the second hydraulic cylinder, and the square-shaped mounting plate simultaneously drives the servo motor, the gear and the two limit teeth to move upward, and when the gear moves to the other outer gear ring, the square-shaped mounting plate drives one of the limit teeth to mesh with one of the outer gear rings, which is used to limit and fix the position of the corresponding annular plate, and the gear drives the other outer gear ring to rotate, and the other outer gear ring drives the corresponding annular plate to rotate, and the annular plate squeezes the corresponding fixed positioning mechanism through the wave through hole to move and clamp the automobile plate-type stamping parts, which can stably fix automobile plate-type stamping parts with different length and width dimensions, thereby improving the welding effect.

[0017] 2. The present invention drives the movable block to move upward through the piston rod of the first hydraulic cylinder, and the movable block drives the ejector plate to move upward. The ejector plate is used to eject the welded automobile plate stamping parts upward, making it convenient for relevant personnel to take out the welded automobile plate stamping parts, and the operation is convenient.

[0018] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural diagram of the present invention;

[0021] Figure 2 It is a structural diagram of the side view of the present invention;

[0022] Figure 3 For the present invention Figure 2 AA side section structure diagram;

[0023] Figure 4 For the present invention Figure 3 A magnified structural diagram of area B;

[0024] Figure 5 For the present invention Figure 3 The enlarged structure diagram of the C region;

[0025] Figure 6 For the present invention Figure 3 The enlarged structure diagram of the D area;

[0026] Figure 7 For the present invention Figure 3 The enlarged structure diagram of the E region;

[0027] Figure 8 It is a structural diagram of the connection between the fixed positioning mechanism and the driving limiting mechanism of the present invention;

[0028] Fig. 9 For the present invention Figure 8 The enlarged structure diagram of the F region;

[0029] Fig.10 It is a structural diagram of the meshing of the gear and the outer gear ring of the present invention.

[0030] Figure numerals: 1, welding assembly; 2, control panel; 3, rubber sleeve; 4, movable through hole; 5, mounting groove; 6, operation through hole; 7, first slide groove; 8, first slider; 9, wave through hole; 10, support platform; 11, support frame; 12, ejection mechanism; 13, fixed positioning mechanism; 14, drive limit mechanism; 15, welding mechanism; 20, steel ball; 21, second slide groove; 22, second slider; 23, movable through groove ; 24. The third slide groove; 25. The third slider; 120. The ejector plate; 121. The movable block; 122. The first hydraulic cylinder; 130. The clamping rod; 131. The moving rod; 132. The spring; 133. The moving block; 140. The U-shaped mounting plate; 141. The second hydraulic cylinder; 142. The U-shaped mounting plate; 143. The annular plate body; 144. The outer gear ring; 145. The gear; 146. The servo motor; 147. The limit gear. DETAILED DESCRIPTION

[0031] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0032] It should be noted that the terms "first", "second", "symmetrical", "array", "disposed on", "disposed with", etc. are only used to distinguish between description and position description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the definition of "first", "symmetrical" and other features may explicitly or implicitly include one or more of these features; similarly, when the quantity of certain features is not limited in the form of words such as "two" or "three", it should be noted that this feature also explicitly or implicitly includes one or more feature quantities;

[0033] In the present invention, unless otherwise clearly specified and limited, the terms such as "installation", "connection", "fixation" and the like should be understood in a broad sense; for example, it can be a fixed connection, a detachable connection, or an integral molding; it can be a mechanical connection, a direct connection, welding, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood based on the description and drawings combined with specific circumstances.

[0034] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0035] like Figure 1-Figure 10As shown, an embodiment of the present invention provides a welding device for automobile plate stamping parts, including a welding assembly 1, wherein the welding assembly 1 includes a support platform 10, a support frame 11, an ejection mechanism 12, four fixed positioning mechanisms 13, a drive limiting mechanism 14 and a welding mechanism 15, wherein the support frame 11 is arranged on the upper surface of the support platform 10, and a control panel 2 is arranged on the front surface of the support frame 11, four movable through holes 4 are opened in a circular array on the upper surface of the support platform 10, and the four fixed positioning mechanisms 13 are slidably connected to the inner walls of the corresponding movable through holes 4, the inner walls of the movable through holes 4 are opened with mounting grooves 5, and the four fixed positioning mechanisms 13 are arranged on the inner walls of the corresponding mounting grooves 5, the drive limiting mechanism 14 is arranged on the outer wall of the support platform 10, and the drive limiting mechanism 14 is all in contact with the four fixed positioning mechanisms 13, the welding mechanism 15 is arranged on the upper surface of the support platform 10, and the control panel 2 is electrically connected to the ejection mechanism 12, the drive limiting mechanism 14 and the welding mechanism 15 through wires.

[0036] In this embodiment, specifically, the fixed positioning mechanism 13 includes a clamping rod 130, a moving rod 131, a spring 132 and a moving block 133, wherein the outer wall of the moving block 133 is slidably connected to the inner wall of the movable through hole 4, and the bottom end of the clamping rod 130 is arranged on the upper surface of the moving block 133, the top end of the moving rod 131 is arranged on the lower surface of the moving block 133, and the moving rod 131 is fitted with the driving limiting mechanism 14, one end of the spring 132 is arranged on one side of the moving block 133, and the other end of the spring 132 is arranged On the inner wall of the corresponding installation groove 5, the moving rod 131 is driven to move by driving the limiting mechanism 14, and the moving block 133 drives the clamping rod 130 to move, and the clamping rod 130 drives the spring 132 to deform, and the clamping rod 130 squeezes and fixes the automobile plate stamping part, wherein the driving limiting mechanism 14 is disengaged from the corresponding moving rod 131, and then the moving block 133 is driven to reset and move by the elastic potential energy of the spring 132, and the moving block 133 drives the clamping rod 130 away from the welded automobile plate stamping part.

[0037] In this embodiment, specifically, the driving limit mechanism 14 includes a U-shaped mounting plate 140, a second hydraulic cylinder 141, a square-shaped mounting plate 142, two annular plate bodies 143, two outer gear rings 144, a gear 145, a servo motor 146 and two limit teeth 147, wherein the U-shaped mounting plate 140 is arranged on the outer wall of the support platform 10, and one side of the square-shaped mounting plate 142 is slidably connected to the inner wall of the U-shaped mounting plate 140, and the servo motor 146 is arranged on the inner wall of the square-shaped mounting plate 142. The side bottom wall, and the gear 145 is arranged on the output shaft of the servo motor 146, an operation through hole 6 is opened on one side of the square-shaped mounting plate 142, and the gear 145 passes through the operation through hole 6, the adjacent sides of the two annular plates 143 are rotatably connected, and the upper surface of the uppermost annular plate 143 is rotatably connected to the lower surface of the support platform 10, two outer tooth rings 144 are arranged on the outer wall of the corresponding annular plate 143, two limit teeth 147 are symmetrically arranged on one side of the square-shaped mounting plate 142, and the gear 14 5 and two limiting teeth 147 are meshed with the corresponding outer gear ring 144, the second hydraulic cylinder 141 is arranged on the lower surface of the U-shaped mounting plate 140, the piston rod of the second hydraulic cylinder 141 passes through the U-shaped mounting plate 140 and is arranged on the lower surface of the square-shaped mounting plate 142, the inner wall of the annular plate body 143 is provided with a wave through hole 9, the control panel 2 is electrically connected with the second hydraulic cylinder 141 and the servo motor 146 through wires, and the output shaft of the servo motor 146 arranged above drives the gear 145 to rotate, the gear 145 rotates on one of the outer gear rings 144, and the outer gear ring 144 drives one of the annular plate bodies 143 to rotate, and the wave through hole 9 on one of the annular plate bodies 143 drives the two fixing and positioning mechanisms 13 to move, so that the two fixing and positioning mechanisms 13 squeeze and fix the automobile plate stamping parts, and another limiting tooth 147 is meshed on the other outer gear ring 144, and the other limiting tooth 147 is used to limit the position of the other annular plate body 143.

[0038] The second hydraulic cylinder 141 drives the square-shaped mounting plate 142 to move upward, and the square-shaped mounting plate 142 drives the servo motor 146, the gear 145 and the two limit teeth 147 to move upward at the same time. When the gear 145 moves to the other outer gear ring 144, the square-shaped mounting plate 142 drives one of the limit teeth 147 to engage with one of the outer gear rings 144 to limit the position of one of the annular plate bodies 143. The other limit tooth 147 disengages from the other outer gear ring 144, and the gear 145 drives the other outer gear ring 144 to rotate. The other outer gear ring 144 drives the other annular plate body 143 to rotate. The other annular plate body 143 squeezes the other two fixed positioning mechanisms 13 through the raised portion of the wave through hole 9, so that the clamping rods 130 on the other two fixed positioning mechanisms 13 squeeze and fix the automobile plate stamping parts.

[0039] In the present embodiment, specifically, the ejection mechanism 12 includes an ejection plate 120, a movable block 121 and a first hydraulic cylinder 122, wherein a movable through groove 23 is opened on the upper surface of the support platform 10, and the outer wall of the movable block 121 is slidably connected to the inner wall of the movable through groove 23, the first hydraulic cylinder 122 is arranged on the lower surface of the support platform 10, the piston rod of the first hydraulic cylinder 122 passes through the support platform 10 and is arranged on the lower surface of the movable block 121, the movable block 121 is arranged on the lower surface of the ejection plate 120, the control panel 2 is electrically connected to the first hydraulic cylinder 122 through an electric wire, the piston rod of the first hydraulic cylinder 122 is arranged above, the movable block 121 is driven to move upward, the movable block 121 drives the ejection plate 120 to move upward, the ejection plate 120 is used to eject the welded automobile plate stamping parts upward, so that the relevant personnel can take out the welded automobile plate stamping parts.

[0040] In this embodiment, specifically, the outer wall of the clamping rod 130 is provided with a rubber sleeve 3 , and the rubber sleeve 3 is provided to enhance the friction between the automobile plate stamping part and the clamping rod 130 .

[0041] In this embodiment, specifically, the outer wall of the moving rod 131 is evenly embedded with steel balls 20. The steel balls 20 are arranged as above to assist the moving rod 131 to move in the wave through hole 9. A protrusion is arranged inside the wave through hole 9 to squeeze the moving rod 131 to move.

[0042] In the present embodiment, specifically, the inner wall of the U-shaped mounting plate 140 is evenly provided with a first sliding groove 7, and the other side of the U-shaped mounting plate 142 is evenly provided with a first sliding block 8, and the outer wall of the first sliding block 8 is slidably connected to the inner wall of the first sliding groove 7. Through the above arrangement, the first sliding block 8 is slid in the first sliding groove 7, which can not only assist the U-shaped mounting plate 142 to move, but also stabilize the moving position of the U-shaped mounting plate 142.

[0043] In the present embodiment, specifically, the inner wall of the movable through hole 4 is symmetrically provided with a second slide groove 21, the outer wall of the movable block 133 is symmetrically provided with a second slider 22, the outer wall of the second slider 22 is slidably connected to the inner wall of the second slide groove 21, and the second slider 22 is slidably connected to the inner wall of the second slide groove 21 through the above setting, so as to slide the second slider 22 in the second slide groove 21, which can not only assist the movable block 133 to move, but also stabilize the moving position of the movable block 133.

[0044] In the present embodiment, specifically, the inner wall of the movable through groove 23 is evenly provided with a third sliding groove 24, the outer wall of the movable block 121 is evenly provided with a third sliding block 25, the outer wall of the third sliding block 25 is slidably connected to the inner wall of the third sliding groove 24, and the third sliding block 25 is slid in the third sliding groove 24 through the above arrangement, which can both assist the movable block 121 to move and stabilize the moving position of the movable block 121.

[0045] When the present invention is working: relevant personnel control the first hydraulic cylinder 122 to start through the control panel 2, the piston rod of the first hydraulic cylinder 122 drives the movable block 121 to move upward, the movable block 121 drives the ejection plate 120 to move upward, and relevant personnel can conveniently place the automobile plate stamping parts on the ejection plate 120. Thereafter, relevant personnel control the piston rod of the first hydraulic cylinder 122 through the control panel 2 to move in the opposite direction, the piston rod of the first hydraulic cylinder 122 drives the movable block 121 to move downward, the movable block 121 drives the ejection plate 120 to move downward, and the ejection plate 120 drives the automobile plate stamping parts to move downward.

[0046] Afterwards, the relevant personnel control the servo motor 146 to start through the control panel 2, and the output shaft of the servo motor 146 drives the gear 145 to rotate, and the gear 145 rotates on one of the outer gear rings 144, and the outer gear ring 144 drives one of the annular plates 143 to rotate, and the wave through hole 9 on one of the annular plates 143 drives the two fixed positioning mechanisms 13 to move, and the raised portion of the wave through hole 9 on one of the annular plates 143 squeezes the moving rods 131 on the two fixed positioning mechanisms 13 to move, and the moving block 133 drives the clamping rod 130 to move, and the clamping rod 130 drives the spring 132 to deform, so that the clamping rods 130 on the two fixed positioning mechanisms 13 squeeze and fix the automobile plate stamping parts, and another limiting tooth 147 is engaged with the other outer gear ring 144, and the other limiting tooth 147 is used to limit the position of the other annular plate 143.

[0047] After that, the relevant personnel control the second hydraulic cylinder 141 to start through the control panel 2, and the second hydraulic cylinder 141 drives the square-shaped mounting plate 142 to move upward, and the square-shaped mounting plate 142 drives the servo motor 146, the gear 145 and the two limit teeth 147 to move upward at the same time. When the gear 145 moves to the other outer gear ring 144, the square-shaped mounting plate 142 drives one of the limit teeth 147 to mesh with one of the outer gear rings 144, so as to limit the position of one of the annular plates 143, and the other limit teeth 147 are engaged with one of the outer gear rings 144. 47 is disengaged from the other outer gear ring 144, the gear 145 drives the other outer gear ring 144 to rotate, the other outer gear ring 144 drives the other annular plate 143 to rotate, the other annular plate 143 squeezes the moving rods 131 on the other two fixed positioning mechanisms 13 through the raised portion of the wave through hole 9 to move, the moving block 133 drives the clamping rod 130 to move, the clamping rod 130 drives the spring 132 to deform, so that the clamping rods 130 on the other two fixed positioning mechanisms 13 squeeze and fix the automobile plate stamping parts.

[0048] Afterwards, the relevant personnel control the welding mechanism 15 to start through the control panel 2. The welding mechanism 15 can adjust the welding position through the X, Y, and Z axes to facilitate the welding of automobile plate stamping parts.

[0049] When it is necessary to take out the welded automobile plate stamping parts, the relevant personnel operate the second hydraulic cylinder 141 and the servo motor 146 in reverse through the control panel 2 to disengage the wave through holes 9 on the two annular plates 143 from the corresponding moving rods 131. Thereafter, the elastic potential energy of the spring 132 drives the moving block 133 to reset, and the moving block 133 drives the clamping rod 130 away from the welded automobile plate stamping parts.

[0050] After that, the relevant personnel control the first hydraulic cylinder 122 to start through the control panel 2, and the piston rod of the first hydraulic cylinder 122 drives the movable block 121 to move upward, and the movable block 121 drives the ejector plate 120 to move upward. The ejector plate 120 is used to eject the welded automobile plate stamping parts upward, making it convenient for the relevant personnel to take out the welded automobile plate stamping parts.

[0051] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of various changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A welding device for automobile plate stamping parts, comprising a welding assembly (1), characterized in that: The welding assembly (1) comprises a support platform (10), a support frame (11), an ejection mechanism (12), four fixed positioning mechanisms (13), a drive limiting mechanism (14) and a welding mechanism (15), wherein: The support frame (11) is arranged on the upper surface of the support platform (10), and a control panel (2) is arranged on the front surface of the support frame (11); The upper surface of the support platform (10) is provided with four movable through holes (4) in a circular array, and the four fixed positioning mechanisms (13) are slidably connected to the inner walls corresponding to the movable through holes (4); The inner wall of the movable through hole (4) is provided with a mounting groove (5), and the four fixing and positioning mechanisms (13) are arranged on the inner walls corresponding to the mounting groove (5); The driving limiting mechanism (14) is arranged on the outer wall of the supporting platform (10), and the driving limiting mechanism (14) is in contact with the four fixed positioning mechanisms (13); The welding mechanism (15) is arranged on the upper surface of the support platform (10), and the control panel (2) is electrically connected to the ejection mechanism (12), the drive limiting mechanism (14) and the welding mechanism (15) respectively through electric wires.

2. The welding device for automobile plate stamping parts according to claim 1, characterized in that: The fixing and positioning mechanism (13) comprises a clamping rod (130), a moving rod (131), a spring (132) and a moving block (133), wherein: The outer wall of the moving block (133) is slidably connected to the inner wall of the movable through hole (4), and the bottom end of the clamping rod (130) is arranged on the upper surface of the moving block (133); The top end of the moving rod (131) is arranged on the lower surface of the moving block (133), and the moving rod (131) is in contact with the driving limiting mechanism (14); One end of the spring (132) is arranged on one side of the moving block (133), and the other end of the spring (132) is arranged on an inner wall corresponding to the installation groove (5).

3. The welding device for automobile plate stamping parts according to claim 2, characterized in that: The driving limiting mechanism (14) comprises a U-shaped mounting plate (140), a second hydraulic cylinder (141), a square-shaped mounting plate (142), two annular plates (143), two outer gear rings (144), a gear (145), a servo motor (146) and two limiting latch teeth (147), wherein: The U-shaped mounting plate (140) is arranged on the outer wall of the support platform (10), and one side of the square-shaped mounting plate (142) is slidably connected to the inner wall of the U-shaped mounting plate (140); The servo motor (146) is arranged on the inner bottom wall of the square-shaped mounting plate (142), and the gear (145) is arranged on the output shaft of the servo motor (146); An operation through hole (6) is provided on one side of the square-shaped mounting plate (142), and the gear (145) passes through the operation through hole (6); The adjacent sides of the two annular plates (143) are rotatably connected, and the upper surface of the uppermost annular plate (143) is rotatably connected to the lower surface of the support platform (10); The two outer toothed rings (144) are arranged on the outer wall of the corresponding annular plate body (143), the two limiting teeth (147) are symmetrically arranged on one side of the square-shaped mounting plate (142), and the gear (145) and the two limiting teeth (147) are meshed with the corresponding outer toothed rings (144); The second hydraulic cylinder (141) is arranged on the lower surface of the U-shaped mounting plate (140); a piston rod of the second hydraulic cylinder (141) passes through the U-shaped mounting plate (140) and is arranged on the lower surface of the square-shaped mounting plate (142); The inner wall of the annular plate (143) is provided with a wave-shaped through hole (9), and the control panel (2) is electrically connected to the second hydraulic cylinder (141) and the servo motor (146) respectively through electric wires.

4. The welding device for automobile plate stamping parts according to claim 1, characterized in that: The ejection mechanism (12) comprises an ejection plate (120), a movable block (121) and a first hydraulic cylinder (122), wherein: A movable through groove (23) is provided on the upper surface of the support platform (10), and the outer wall of the movable block (121) is slidably connected to the inner wall of the movable through groove (23); The first hydraulic cylinder (122) is arranged on the lower surface of the support platform (10), and the piston rod of the first hydraulic cylinder (122) passes through the support platform (10) and is arranged on the lower surface of the movable block (121); The movable block (121) is arranged on the lower surface of the ejection plate (120), and the control panel (2) is electrically connected to the first hydraulic cylinder (122) via an electric wire.

5. The welding device for automobile plate stamping parts according to claim 2, characterized in that: The outer wall of the clamping rod (130) is provided with a rubber sleeve (3).

6. The welding device for automobile plate stamping parts according to claim 2, characterized in that: The outer wall of the moving rod (131) is evenly embedded with steel balls (20).

7. The welding device for automobile plate stamping parts according to claim 3, characterized in that: The inner wall of the U-shaped mounting plate (140) is evenly provided with a first sliding groove (7), and the other side of the U-shaped mounting plate (142) is evenly provided with a first sliding block (8), and the outer wall of the first sliding block (8) is slidably connected to the inner wall of the first sliding groove (7).

8. The welding device for automobile plate stamping parts according to claim 2, characterized in that: The inner wall of the movable through hole (4) is symmetrically provided with a second sliding groove (21), and the outer wall of the movable block (133) is symmetrically provided with a second sliding block (22), and the outer wall of the second sliding block (22) is slidably connected to the inner wall of the second sliding groove (21).

9. The welding device for automobile plate stamping parts according to claim 4, characterized in that: The inner wall of the movable through groove (23) is evenly provided with a third sliding groove (24), the outer wall of the movable block (121) is evenly provided with a third sliding block (25), and the outer wall of the third sliding block (25) is slidably connected to the inner wall of the third sliding groove (24).

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