Injection mold combined welding device

Abstract

The present invention relates to the technical field of welding equipment, and specifically discloses an injection mold combination welding device, comprising a base, a robotic arm main body, a welding gun, a movable structure, a clamping structure and several supporting structures; the robotic arm main body is fixedly arranged on the rear end upper wall of the base and is located in the middle, the welding gun is fixedly arranged on the robotic arm main body, the movable structure is fixedly arranged in the middle of the upper wall of the base and is located on the front side of the robotic arm main body, and the clamping structure is fixedly arranged on the movable structure; the clamping structure drives the relatively arranged supporting structure to clamp the workpiece, and after the workpiece is driven to move to a higher height, the supporting arm in the supporting structure is rotated under the limit of the clamping wheel, so that one end of the supporting arm is extended into the bottom of the workpiece to lift the workpiece and bear the force, and the workpiece can also be carried by the first supporting roller to facilitate the left and right movement of the workpiece to adjust the position; through the support from the bottom of the supporting arm and the clamping force of the clamping arm, the two workpieces are prompted to move relative to each other with the help of the movable structure to achieve stable docking.

Description

Technical Field

[0001] The invention relates to the technical field of welding equipment, in particular to an injection mold assembly welding device. Background Art

[0002] Injection mold welding refers to the process of repairing damaged parts of the mold or performing local modifications to the mold through welding technology during mold manufacturing or maintenance. During the mold welding process, the use of fixtures is crucial, as it can effectively control welding deformation, ensure welding accuracy, and improve welding efficiency. Because some large injection molds are large and heavy because they are made of metal, placing the workpiece on the fixture equipment before welding is relatively labor-intensive. At the same time, existing fixtures can only be fixed in a single position and cannot be fully adjusted. Summary of the Invention

[0003] The object of the present invention is to provide an injection mold assembly welding device to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: an injection mold combination welding device, comprising a base, a robotic arm body, a welding gun, a movable structure, a clamping structure and several supporting structures; the robotic arm body is fixedly arranged on the rear end upper wall of the base and is located in the middle, the welding gun is fixedly arranged on the robotic arm body, the movable structure is fixedly arranged in the middle of the upper wall of the base and is located on the front side of the robotic arm body, the clamping structure is fixedly arranged on the movable structure, and several supporting structures are symmetrically arranged on the clamping structure; the robotic arm body is used to drive the welding gun to perform automatic welding, the movable structure is used to move left and right to control the workpiece, the clamping structure is used to apply force to drive the supporting structure to move relative to clamp, and the supporting structure is used to apply force to clamp the workpiece and support the lower wall of the workpiece to bear force.

[0005] Preferably, the movable structure includes a pair of brackets, a pair of first electric slide rails, two pairs of first hydraulic cylinders and two pairs of clamping seats; one end of a pair of the brackets are symmetrically arranged on the upper walls of the left and right ends of the base, a pair of the first electric slide rails are symmetrically arranged between the top ends of the brackets and are relatively parallel, a pair of the first electric slide rails are symmetrically provided with first movable seats that can move relative to each other, one end of the two pairs of the first hydraulic cylinders are fixedly arranged on the first movable seats of the first electric slide rails, and the two pairs of the clamping seats are symmetrically arranged on the telescopic ends of the first hydraulic cylinders.

[0006] Preferably, the clamping structure includes a pair of clamping components, and the pair of clamping components are symmetrically arranged between one pair of clamping seats, and the clamping components are symmetrically located at the left and right ends of the first hydraulic cylinder; the clamping component includes a bearing plate, a second electric slide rail and a pair of mounting frames; the bearing plate is fixedly arranged between one pair of clamping seats, and a positioning groove is provided through the middle of the bearing plate, the second electric slide rail is fixedly arranged in the middle of the upper wall of the bearing plate, and the second movable seat on the second electric slide rail is movably inserted in the positioning groove, and the pair of mounting frames are both door-type structures, wherein the first mounting frame is fixedly arranged on the lower wall of the front end of the bearing plate, and the second mounting frame is fixedly arranged on the second electric slide rail and moves back and forth.

[0007] Preferably, several of the supporting structures are fixedly arranged on both ends of the mounting frame and are symmetrical to each other; the supporting structure includes a pair of clamping arms, several first wheel arms, several clamping wheels, a supporting arm, a pair of shaft arms, a shaft rod, a pair of gears, a bearing seat, a second hydraulic cylinder and a rack; a pair of the clamping arms are all L-shaped, and one end of a pair of the clamping arms is fixedly clamped on the left and right sides of one end of the mounting frame, one end of several of the first wheel arms is fixedly arranged on the side wall of the clamping arm along the arc, and the first wheel arms are symmetrically located on both sides of the clamping arm, several of the clamping wheels are movably arranged on the other end of the first wheel arm, and the clamping wheels are located between the clamping arms, the supporting arm is an arc-shaped structure and the inner ring side wall of the supporting arm is provided with teeth along the arc, and the left and right sides of the supporting arm are fixedly clamped. A wheel groove is provided in the middle of each side wall. The support arm is movably embedded between several clamping wheels, and the wheel groove is mounted on the clamping wheels. A pair of shaft arms are symmetrically arranged on the opposite side walls of the clamping arms, and the shaft arms are close to the bottom ends of the clamping arms. The two ends of the shaft rod movably pass through the shaft arms. A pair of gears are fixedly mounted on the shaft rod, and one of the gears is located between the first wheel arms, and one of the gears is engaged with the support arm. One end of the bearing seat is fixedly set on the side wall of one end of one of the clamping arms, and the other end of the bearing seat is located above the gear. One end of the second hydraulic cylinder is fixedly set on the lower wall of the other end of the bearing seat, and one end of the rack is fixedly set on the telescopic end of the second hydraulic cylinder, and the other end of the rack is engaged with another gear.

[0008] Preferably, a third hydraulic cylinder is provided on the inner ring side wall of the bottom end of the support arm, and a first roller is movably provided on the third hydraulic cylinder, and the first roller is used for moving the workpiece left and right.

[0009] Preferably, a pair of second wheel arms are obliquely installed on the bottom end of the support arm, and a second roller is movably provided between the other ends of the second wheel arms. The second roller is used for rotating the support arm to the lower wall of the workpiece and moving with the help of the second roller to prevent friction.

[0010] Preferably, the rotation direction of the second roller is perpendicular to the rotation direction of the first roller.

[0011] Preferably, the bottom end of the support arm is located above or below the other end of the clamping arm.

[0012] The invention provides an injection mold assembly welding device, which has the following beneficial effects: it realizes driving by means of a simple mechanical structure with the aid of a hydraulic cylinder and an electric slide rail; it drives a relatively arranged supporting structure to clamp the workpiece through a clamping structure, and after the workpiece is driven to move to a higher height, the supporting arm in the supporting structure rotates under the limit of the clamping wheel, prompting one end of the supporting arm to extend into the bottom of the workpiece to lift the workpiece and bear the force, and it can also facilitate the left and right movement of the workpiece to adjust the position by means of the first supporting roller; through the support from the bottom of the supporting arm and the clamping force of the clamping arm, the two workpieces are prompted to move relative to each other with the aid of the moving structure to achieve stable docking; and because there is a certain height after docking, it is also convenient for the mechanical arm to drive the welding gun to perform bidirectional welding on the upper and lower wall surfaces; in summary, the invention has the following effects:

[0013] 1. The coordinated work of the clamping structure and the lifting structure can automatically complete the clamping, lifting and moving of the workpiece, reduce manual operation and reduce labor intensity. The supporting arm rotates under the limit of the clamping wheel and can accurately reach the bottom of the workpiece to ensure that the workpiece is evenly stressed and avoid tilting or falling off. The workpiece is carried by the first roller, and the left and right positions of the workpiece can be easily adjusted to ensure accuracy during docking.

[0014] 2. Through the support from the bottom of the support arm and the clamping force of the clamping arm, the two workpieces can be stably docked to avoid offset or dislocation during the docking process. After docking, the workpieces have a certain height, which makes it easier for the robotic arm to drive the welding gun to perform two-way welding on the upper and lower walls, ensuring welding quality.

[0015] 3. The present invention integrates multiple functions such as clamping, lifting, moving, docking and welding, and is suitable for the processing needs of various workpieces. By adjusting the position of the clamping structure and the support arm, it can adapt to workpieces of different sizes, thereby improving the versatility of the equipment.

[0016] 4. The dual functions of the clamping arm and the supporting arm ensure that the workpiece will not fall off or be damaged during the movement and docking process, thereby improving operational safety. The limit devices of the clamping wheel and the supporting arm can prevent the workpiece from being overloaded or exceeding the moving range, thereby avoiding damage to the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the assembly structure of the present invention;

[0018] Figure 2 for Figure 1 A partially enlarged structural schematic diagram;

[0019] Figure 3 Split the structure diagram for the mobile structure;

[0020] Figure 4This is a schematic diagram of the split structure of the clamping structure;

[0021] Figure 5 This is a schematic diagram of the split structure of the supporting structure;

[0022] Figure 6 This is a schematic diagram of the enlarged structure of the support structure assembly;

[0023] Figure 7 for Figure 5 A local enlarged structural diagram in FIG.

[0024] Figure 8 for Figure 5 A schematic diagram of the local enlarged structure at point B in FIG.

[0025] Figure 9 for Figure 5 Schematic diagram of the local enlarged structure at point C in the figure.

[0026] In the figure: 1. base, 2. robot arm body, 3. welding gun, 4. moving structure, 41. bracket, 42. first electric slide rail, 43. first hydraulic cylinder, 44. holder, 5. clamping structure, 51. load-bearing plate, 52. second electric slide rail, 53. mounting frame, 6. supporting structure, 60. clamping arm, 61. first wheel arm, 62. clamping wheel, 63. supporting arm, 64. shaft arm, 65. shaft rod, 66. gear, 67. load-bearing seat, 68. second hydraulic cylinder, 69. rack, 7. third hydraulic cylinder, 8. first roller, 9. second wheel arm, 10. second roller, 11. wheel groove. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] See also Figures 1-9 The present invention provides a technical solution: a combined welding device for an injection mold, comprising a base 1, a robotic arm body 2, a welding gun 3, a moving structure 4, a clamping structure 5 and a plurality of supporting structures 6; the robotic arm body 2 is fixedly arranged on the rear end upper wall of the base 1 and is located in the middle, the welding gun 3 is fixedly arranged on the robotic arm body 2, the moving structure 4 is fixedly arranged in the middle of the upper wall of the base 1 and is located on the front side of the robotic arm body 2, the clamping structure 5 is fixedly arranged on the moving structure 4, and a plurality of supporting structures 6 are symmetrically arranged on the clamping structure 5; the robotic arm body 2 is used to drive the welding gun 3 to perform automatic welding.

[0029] Furthermore, the moving structure 4 is used to move the workpiece left and right, and the moving structure 4 includes a pair of brackets 41, a pair of first electric slide rails 42, two pairs of first hydraulic cylinders 43 and two pairs of clamping seats 44;

[0030] One end of a pair of brackets 41 is symmetrically arranged on the left and right upper walls of the base 1, a pair of first electric slide rails 42 are symmetrically arranged between the top ends of the brackets 41 and are relatively parallel, and a pair of first electric slide rails 42 are symmetrically provided with first movable seats that can move relatively. One end of two pairs of first hydraulic cylinders 43 are fixedly arranged on the first movable seats of the first electric slide rails 42, and two pairs of clamping seats 44 are symmetrically arranged on the telescopic ends of the first hydraulic cylinders 43; the first electric slide rails 42 are supported by the brackets 41, and the two first electric slide rails 42 are arranged in parallel to drive the heavier workpiece together, and the clamping seats 44 are driven to rise and fall by the first hydraulic cylinders 43.

[0031] Furthermore, the clamping structure 5 is used to apply force to drive the supporting structure 6 to move relative to each other for clamping. The clamping structure 5 includes a pair of clamping components, which are symmetrically arranged between one pair of clamping seats 44, and the clamping components are respectively located symmetrically at the left and right ends of the first hydraulic cylinder 43; the clamping component includes a bearing plate 51, a second electric slide rail 52 and a pair of mounting frames 53; the bearing plate 51 is fixedly arranged between one pair of clamping seats 44, and an adjustment groove is provided in the middle of the bearing plate 51, and the second electric slide rail 52 is fixedly arranged in the upper wall of the bearing plate 51 The second movable seat on the second electric slide rail 52 is movably inserted in the adjustment groove, and a pair of mounting frames 53 are both door-type structures, wherein the first mounting frame 53 is fixedly arranged on the lower wall of the front end of the supporting plate 51, wherein the second mounting frame 53 is fixedly arranged on the second electric slide rail 52 and moves back and forth; the supporting plate 51 is installed on the clamping seat 44 for fixation, and the supporting plate 51 is driven to rise and fall by the first hydraulic cylinder 43, and the supporting plate 51 is driven to move left and right by the first electric slide rail 42, and the mounting frame 53 is driven to move relatively by the second electric slide rail 52 for clamping.

[0032] Furthermore, the supporting structure 6 is used to clamp the workpiece and support the lower wall of the workpiece to bear the force. The supporting structures 6 are fixedly arranged on both ends of the mounting frame 53 and are symmetrical with each other; the supporting structure 6 includes a pair of clamping arms 60, a plurality of first wheel arms 61, a plurality of clamping wheels 62, a supporting arm 63, a pair of shaft arms 64, a shaft 65, a pair of gears 66, a bearing seat 67, a second hydraulic cylinder 68 and a rack 69; the pair of clamping arms 60 are both L-shaped, one end of the pair of clamping arms 60 is fixedly clamped on the left and right sides of one end of the mounting frame 53, and one end of the plurality of first wheel arms 61 is fixedly arranged on the sides of the clamping arms 60 along the arc. Wall, and the first wheel arm 61 is symmetrically located on both sides of the clamping arm 60, a number of clamping wheels 62 are movably arranged on the other end of the first wheel arm 61, and the clamping wheels 62 are located between the clamping arms 60, the support arm 63 is an arc-shaped structure and the inner ring side wall of the support arm 63 is provided with teeth along the arc, the middle of the left and right side walls of the support arm 63 are provided with wheel grooves 11, the support arm 63 is movably embedded between the number of clamping wheels 62, and the wheel grooves 11 are set on the clamping wheels 62, a pair of shaft arms 64 are symmetrically arranged on the opposite side walls of the clamping arm 60, and the shaft arms 64 are close to the bottom end of the clamping arm 60, the two ends of the shaft rod 65 are movably passed through the shaft arms 64, a pair of gears 6 6 is fixedly mounted on the shaft 65, and one of the gears 66 is located between the first wheel arms 61, and one of the gears 66 is engaged with the supporting arm 63. One end of the bearing seat 67 is fixedly set on the side wall of one end of one of the clamping arms 60, and the other end of the bearing seat 67 is located above the gear 66. One end of the second hydraulic cylinder 68 is fixedly set on the lower wall of the other end of the bearing seat 67, and one end of the rack 69 is fixedly set on the telescopic end of the second hydraulic cylinder 68, and the other end of the rack 69 is engaged with another gear 66; the rack 69 is driven down by the second hydraulic cylinder 68 on the bearing seat 67, and the rack 69 is driven by the rack A gear 66 is used to transmit the two gears 66 to rotate on the shaft arm 64, and then the engagement between the gear 66 and the support arm 63 drives the support arm 63 to rotate along an arc with the help of the clamping wheel 62 in the wheel groove 11, so that one end of the support arm 63 can be located below or above the other end of the clamping arm 60. A third hydraulic cylinder 7 is provided on the inner ring side wall of the bottom end of the support arm 63, and a first roller 8 is movably provided on the third hydraulic cylinder 7. The first roller 8 is used to move the workpiece left and right to prevent friction on the workpiece when the workpiece is lifted and subjected to force. The bottom end of the support arm 63 is located above or below the other end of the clamping arm 60, and is used to receive or rotate the workpiece.

[0033] As a preferred solution, further, a pair of second wheel arms 9 are obliquely installed on the bottom end of the supporting arm 63, and a second roller 10 is movably provided between the other ends of the second wheel arms 9. The second roller 10 is used to rotate the supporting arm 63 to the lower wall of the workpiece and move it with the help of the second roller 10 to prevent friction. The rotation direction of the second roller 10 is perpendicular to the rotation direction of the first roller 8, and is used to achieve rotation in two directions according to design requirements, and it plays different roles.

[0034] The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process. The specific operations are as follows.

[0035] Step 1. Place the device on the ground stably using the base 1. After powering on the device, it can be driven to fix the mold workpiece and perform welding processing;

[0036] Step 2. First, use a cart or other tool to place mold A and mold B on the base 1, between the brackets 41 of the movable structure 4, and place the workpiece and the clamping arm 60 accordingly;

[0037] Step 3. The clamping structure 5 fixed by the clamping seat 44 is driven to descend by driving the first hydraulic cylinder 43. That is, the clamping seat 44 drives the carrying plate 51 to descend. The carrying plate 51 drives the mounting frame 53 symmetrically arranged on the electric slide to descend, thereby finally driving the supporting structures 6 respectively arranged at the two opposite ends of the mounting frame 53 to descend. The supporting structures 6 at the front and rear ends of the second electric slide 52 are positioned at the front and rear sides of the workpiece. The second electric slide 52 is then driven to drive the mounting frame 53 to move relative to each other, so that the corresponding supporting structures 6 can be moved relative to each other, and the front and rear sides of the workpiece can be clamped by the clamping arms 60.

[0038] Step 4. Next, the first hydraulic cylinder 43 is controlled to contract to clamp the workpiece and lift it to a certain height, and the second hydraulic cylinder 68 on the support seat 67 is driven to extend. The rack 69 is driven to descend by the second hydraulic cylinder 68. The gear 66 is driven to rotate on the shaft arm 64 with the help of the engagement between the rack 69 and the gear 66 with the help of the shaft rod 65, and then the gear 66 between the shaft arm 64 is engaged with the support arm 63, driving the support arm 63 to insert the clamping wheel 62 on the first wheel arm 61 into the limit position in the wheel groove 11, prompting the support arm 63 to rotate on the clamping wheel 62. Since the support arm 63 is arc-shaped Therefore, as the supporting arm 63 rotates, one end of the supporting arm 9 and the second roller 10 is passed under the bottom end of the clamping arm 60 and is located under the workpiece, and the workpiece is lifted upward. As the supporting arm 63 rotates, the second roller 10 contacts the lower wall to prevent wear. After the workpiece is lifted by the second roller 10, the third hydraulic cylinder 7 can be driven to drive the first roller 8 to lift the workpiece again. At this time, the workpiece can be manually pushed along the first electric slide rail 42 to adjust its position horizontally to the left and right according to demand, and then clamped and fixed with the help of the clamping arm 60 after adjustment.

[0039] Step 5. Following the same principle as described in Step 4 above, after both molds A and B are clamped and fixed, the first electric slide 42 is used to drive the clamping structure 5 and the workpieces to move relative to each other for stable contact and docking. Finally, the robot body 2 is used to control the welding gun 3 to weld the upper and lower walls of the molds.

[0040] Step 6. After mold A and mold B are welded, if mold C needs to be welded, then when mold C is welded to mold A, the above operation is performed with the help of the first roller 8 to support and relax the welded mold A and mold B, and mold A is moved to the supporting structure 6 fixed to mold B with the help of the first roller 8, and the supporting structure 6 fixed to the original mold A is left empty, and then mold C is placed in for support, lifting, moving and correcting, clamping and fixing, and relative movement for butt welding.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An injection mold assembly welding device, characterized in that: The invention comprises a base (1), a robot arm body (2), a welding gun (3), a movable structure (4), a clamping structure (5) and a plurality of supporting structures (6); the robot arm body (2) is fixedly arranged on the upper wall of the rear end of the base (1) and is located in the middle part; the welding gun (3) is fixedly arranged on the robot arm body (2); the movable structure (4) is fixedly arranged on the middle part of the upper wall of the base (1) and is located in the front side of the robot arm body (2); the clamping structure (5) is fixedly arranged on the movable structure (4); and the plurality of supporting structures (6) are symmetrically arranged on the clamping structure (5); The robot arm body (2) is used to drive the welding gun (3) to perform automatic welding, the moving structure (4) is used to control the left and right movement of the workpiece, the clamping structure (5) is used to apply force to drive the supporting structure (6) to move relatively for clamping, and the supporting structure (6) is used to apply force to clamp the workpiece and to support the lower wall of the workpiece to receive force; The movable structure (4) comprises a pair of brackets (41), a pair of first electric slide rails (42), two pairs of first hydraulic cylinders (43) and two pairs of clamping seats (44); One end of a pair of the brackets (41) is symmetrically arranged on the upper walls of the left and right ends of the base (1), a pair of the first electric slide rails (42) are symmetrically arranged between the top ends of the brackets (41) and are relatively parallel, a first movable seat that moves relatively is symmetrically arranged on each of the pair of the first electric slide rails (42), one end of the two pairs of the first hydraulic cylinders (43) are fixedly arranged on the first movable seat of the first electric slide rails (42), and the two pairs of the clamping seats (44) are symmetrically arranged on the telescopic ends of the first hydraulic cylinders (43); The clamping structure (5) includes a pair of clamping assemblies, each of which is symmetrically arranged between a pair of clamping seats (44), and the clamping assemblies are symmetrically located at the left and right ends of the first hydraulic cylinder (43); The clamping assembly includes a carrier plate (51), a second electric slide rail (52) and a pair of mounting brackets (53); the carrier plate (51) is fixedly arranged between one of the pair of clamping seats (44), and a positioning groove is provided through the middle of the carrier plate (51); the second electric slide rail (52) is fixedly arranged in the middle of the upper wall of the carrier plate (51), and the second movable seat on the second electric slide rail (52) is movably inserted into the positioning groove; the pair of mounting brackets (53) are both door-type structures, wherein the first mounting bracket (53) is fixedly arranged on the lower wall of the front end of the carrier plate (51), and the second mounting bracket (53) is fixedly arranged on the second electric slide rail (52) and moves forward and backward; The plurality of supporting structures (6) are respectively fixedly arranged on both ends of the mounting frame (53) and are symmetrical to each other; The supporting structure (6) includes a pair of clamping arms (60), a plurality of first wheel arms (61), a plurality of clamping wheels (62), a supporting arm (63), a pair of shaft arms (64), a shaft (65), a pair of gears (66), a bearing seat (67), a second hydraulic cylinder (68) and a rack (69); The pair of clamping arms (60) are both L-shaped, and one end of the pair of clamping arms (60) is fixedly clamped on the left and right sides of one end of the mounting frame (53), and one end of a plurality of first wheel arms (61) is fixedly arranged on the side wall of the clamping arm (60) along the arc, and the first wheel arms (61) are symmetrically located on both sides of the clamping arm (60), and a plurality of clamping wheels (62) are movably arranged on the other end of the first wheel arm (61), and the clamping wheels (62) are located between the clamping arms (60). The support arm (63) is an arc-shaped structure, and the inner ring side wall of the support arm (63) is provided with teeth along the arc. The middle part of the left and right side walls of the support arm (63) is provided with a wheel groove (11), and the support arm (63) is movably embedded between the plurality of clamping wheels (62), and the wheel groove (11) is set on the clamping wheel (62). The pair of shaft arms (64) are respectively The two ends of the shaft rod (65) are symmetrically arranged on the opposite side walls of the clamping arm (60), and the shaft arm (64) is close to the bottom end of the clamping arm (60). The two ends of the shaft rod (65) are respectively movable through the shaft arm (64). A pair of gears (66) are fixedly sleeved on the shaft rod (65), and one of the gears (66) is located between the first wheel arms (61). One of the gears (66) is engaged with the supporting arm (63). One end of the bearing seat (67) is fixedly arranged on the side wall of one end of one of the clamping arms (60), and the other end of the bearing seat (67) is located above the gear (66). One end of the second hydraulic cylinder (68) is fixedly arranged on the lower wall of the other end of the bearing seat (67). One end of the rack (69) is fixedly arranged on the telescopic end of the second hydraulic cylinder (68), and the other end of the rack (69) is engaged with another gear (66).

2. The injection mold assembly welding device according to claim 1, characterized in that: A third hydraulic cylinder (7) is provided on the inner ring side wall of the bottom end of the supporting arm (63), and a first roller (8) is movably provided on the third hydraulic cylinder (7), and the first roller (8) is used for moving the workpiece left and right.

3. The injection mold assembly welding device according to claim 2, characterized in that: A pair of second wheel arms (9) are obliquely mounted on the bottom end of the supporting arm (63), and a second roller (10) is movably arranged between the other ends of the second wheel arms (9). The second roller (10) is used for rotating the supporting arm (63) to the lower wall of the workpiece and applying force with the help of the second roller (10) to prevent friction.

4. The injection mold assembly welding device according to claim 3, characterized in that: The rotation direction of the second roller (10) is perpendicular to the rotation direction of the first roller (8).

5. The injection mold assembly welding device according to claim 4, characterized in that: The bottom end of the supporting arm (63) is located above or below the other end of the clamping arm (60).

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