Die frame welding cooperation tool and repairing process

Abstract

The application discloses a mold frame welding cooperation tool and a repairing process, and relates to the technical field of mold frame welding. The tool comprises a workbench, and supporting frames are oppositely arranged on the workbench. Positioning plates are oppositely arranged between the two supporting frames, and the two positioning plates are connected with first driving mechanisms which drive the two positioning plates to move towards the inner side or the outer side simultaneously. Four groups of clamping plates are arranged in a circumferential array on one side of the two positioning plates, and the four groups of clamping plates are connected with second driving mechanisms which drive the four groups of clamping plates to move towards the inner side or the outer side simultaneously. A rotating mechanism is further arranged on the workbench, and the rotating mechanism is used for driving the positioning plates to rotate so as to adjust the welding seam angle. During the welding process of the mold frame, when the upper connecting end is welded, the positioning plates are driven to rotate by the rotating mechanism, and the positioning plates drive the mold frame to rotate simultaneously, so that the adjustment of the connecting end of the two mold frames is realized. The mold frame does not need to be disassembled and reassembled, and the operation is more convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mold frame welding, in particular to a mold frame welding cooperation tool and a repair process. BACKGROUND

[0002] The mold frame is the skeleton of the whole mold, and its main function is to combine and fix the parts of the mold according to certain rules and positions, and to enable the mold to be installed on a die casting machine or an injection molding machine.

[0003] Various molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging forming, smelting, stamping and other methods. In short, a mold is a tool used to make shaped objects. Such a tool is composed of various parts, and different molds are composed of different parts. It mainly realizes the processing of the shape of the object by changing the physical state of the molded material. A welding device is needed during the mold processing process.

[0004] In actual application, when welding two block-shaped molds, the connecting end faces of the two molds are rectangular, so that the welding gun needs to be constantly adjusted or the position of the weld is adjusted when welding the connecting ends of the two molds. However, in order to improve the stability of the mold workpiece, a positioning clamp is usually used to fix it, and the mold workpiece needs to be repeatedly disassembled and assembled for weld adjustment, which is a relatively cumbersome process. SUMMARY

[0005] The purpose of the present application is to provide a mold frame welding cooperation tool and a repair process, which solves the following technical problems:

[0006] In order to improve the stability of the mold workpiece, a positioning clamp is usually used to fix it, and the mold workpiece needs to be repeatedly disassembled and assembled for weld adjustment, which is a relatively cumbersome process.

[0007] The purpose of the present application can be achieved by the following technical solutions:

[0008] A mold frame welding cooperation tool, comprising a workbench, the workbench is oppositely fixed and arranged with a support frame;

[0009] The two sides of the support frame are oppositely arranged with a positioning plate, and the two sides of the positioning plate are connected with a first driving mechanism for driving them to move synchronously towards the inside or outside;

[0010] The two sides of the positioning plate are oppositely arranged with four groups of clamping plates, and the four groups of clamping plates are connected with a second driving mechanism for driving them to move synchronously towards the inside or outside;

[0011] The workbench is also provided with a rotating mechanism, which is used to drive the positioning plate to rotate to adjust the weld angle;

[0012] The side of the two positioning plates close to each other is arranged with four groups of L-shaped movable plates in a circumferential array, and the clamping plates are slidably arranged on the L-shaped movable plates.

[0013] Preferably, the first driving mechanism comprises positioning frames fixedly arranged on the workbench, and a screw rod rotatably arranged between the two positioning frames, and the end of the screw rod is fixedly connected with the output end of the first motor.

[0014] The screw rod is arranged with a nut in a screwing manner, and the side of the two positioning plates away from each other is fixedly arranged with a positioning rod, and the positioning rod is rotatably arranged with a shaft sleeve fixedly connected with the nut.

[0015] Preferably, the second driving mechanism comprises four groups of sliding grooves arranged on the positioning plate in a circumferential array, and the sliding grooves are slidably arranged with sliding seats fixedly connected with the L-shaped movable plates.

[0016] The side of the positioning plate is rotatably arranged with a toothed disc, the toothed disc is rotatably arranged on the positioning rod, four groups of arc-shaped grooves corresponding to the sliding grooves are arranged on the toothed disc in a circumferential array, the arc-shaped grooves extend from the near disc center end to the far disc center end, and the arc-shaped grooves are slidably arranged with pins fixedly connected with the sliding seats.

[0017] Preferably, the side of the positioning plate is arranged with a second motor, and the output end of the second motor is fixedly connected with a first gear meshing with the toothed disc.

[0018] Preferably, the positioning rod is arranged in a hollow structure, the rotating mechanism comprises a driving rod slidably connected with the positioning rod, a plurality of groups of strip-shaped clamping seats are arranged on the driving rod in a circumferential array, and a plurality of groups of strip-shaped clamping grooves corresponding to the strip-shaped clamping seats are arranged in the positioning rod.

[0019] The end of the driving shaft is provided with a second gear, the second gear is meshed with the first gear rack, a bottom plate is arranged on one side of the workbench, a driving cylinder is arranged on the bottom plate, and the driving end of the driving cylinder is synchronously meshed with the two first gear racks through a support.

[0020] Preferably, two groups of support plates for supporting the mold frame of the mold are arranged between the two positioning plates, the support plates are connected with a jacking mechanism for lifting the support plates on the workbench.

[0021] The jacking mechanism comprises a limiting plate fixedly connected with the support plate, a rack is arranged on one side of the limiting plate, the rack is meshed with a second gear rack, and the screw rod is arranged with a third gear meshed with the second gear rack.

[0022] Preferably, the limiting plate is arranged in a hollow structure.

[0023] The rack is fixedly connected with a piston slidably arranged in a limiting plate, a second spring fixedly connected with the piston is further arranged in a cavity of the limiting plate, and the other side of the limiting plate is connected with an air inlet mechanism.

[0024] Preferably, the air inlet mechanism comprises an air inlet pipe in communication with the cavity, wherein the side of the two side support frames close to each other is arranged with a cylinder body, an air plug is arranged in the cylinder body, the two side air inlet pipes are respectively connected with main air pipes, the two ends of the two side main air pipes are respectively communicated with the cylinder body through air conveying pipes, and the air plug is connected with an adjusting mechanism for driving the air plug to move in the cylinder body.

[0025] Preferably, the adjusting mechanism comprises an adjusting disc arranged in the close direction of the two side positioning plates.

[0026] Preferably, the driving rod is synchronously arranged as a hollow mechanism, a positioning rod and the driving rod are arranged with a driving shaft fixed with the adjusting disc, the driving shaft is fixed with the air plug, a third spring is arranged on the driving shaft, one end of the third spring is fixed with the driving shaft, and the other end of the third spring is fixed with the cylinder body.

[0027] A repairing process of a mold frame welding cooperation tooling, comprising the following steps:

[0028] S1, first, the two side mold frames are respectively placed on the support plates, and the lifting mechanism adjusts the support plates to be moved upward to a specified height;

[0029] S2, the first driving mechanism drives the two side positioning plates to be synchronously moved toward the inside, so as to give the mold frames a fixing force toward the inside;

[0030] S3, the second driving mechanism synchronously drives the four groups of clamping plates to be moved toward the inside to be in contact with the mold frames, so as to realize the positioning of the mold frames;

[0031] S4, after the welding of the connecting end of one direction between the two side mold frames is completed, the rotating mechanism drives the positioning plates to be rotated, the positioning plates synchronously drive the mold frames to be rotated, so as to realize the adjustment of the connecting end of the two side mold frames and realize the all-around welding.

[0032] The beneficial effects of the present application are as follows:

[0033] (1) When the two groups of mold frames are welded, first, the two groups of mold frames are placed between the two side positioning plates, then the first driving mechanism drives the two side positioning plates to be synchronously moved toward the inside, so as to give the mold frames a fixing force toward the inside, so that the connecting end of the two side mold frames is tightly attached, so as to form a complete weld;

[0034] (2) the mold frame of the present application in the process of welding, when the upper connecting end is welded, the positioning plate is driven to rotate by the rotating mechanism, the positioning plate drives the mold frame to rotate synchronously, so as to realize the adjustment of the connecting end of the mold frame on both sides, and the mold frame does not need to be disassembled and assembled again during the adjustment process, so the operation is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0035] The present application will be further described below in combination with the drawings.

[0036] Figure 1 is the structure diagram of the mold frame welding cooperation tool of the present application Figure 1 ;

[0037] Figure 2 is the structure diagram of the mold frame welding cooperation tool of the present application Figure 2 ;

[0038] Figure 3 is the structure diagram of the mold frame welding cooperation tool of the present application Figure 3 ;

[0039] Figure 4 is the structure diagram of the mold frame welding cooperation tool of the present application Figure 4 ;

[0040] Figure 5 is the structure diagram of the positioning plate in the mold frame welding cooperation tool of the present application;

[0041] Figure 6 is the structure diagram of the limiting plate in the mold frame welding cooperation tool of the present application;

[0042] Figure 7 is the structure diagram of the mold frame welding cooperation tool of the present application.

[0043] As shown in the figure, 1, workbench; 2, screw rod; 3, third gear; 4, cylinder; 5, bottom plate; 6, second gear; 7, drive rod; 8, positioning plate; 9, adjusting disc; 101, positioning frame; 102, guide rod; 103, support frame; 201, first motor; 202, nut; 203, shaft sleeve; 301, second rack; 302, support plate; 303, rack; 304, limiting plate; 305, air inlet pipe; 306, second spring; 401, drive shaft; 402, third spring; 403, gas conveying pipe; 404, main gas pipe; 501, drive cylinder; 502, support; 503, first rack; 701, strip-shaped clamping seat; 702, positioning rod; 801, second motor; 802, first gear; 803, handle; 804, screw rod; 805, L-shaped movable plate; 806, clamping plate; 807, toothed disc; 808, arc-shaped groove; 809, pin shaft; 810, sliding groove; 811, guide rod; 812, sliding seat; 813, first spring; 901, second electrode ring. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0045] Embodiment 1

[0046] Please refer to Figures 1-2 As shown in the figure, the present application is a mold frame welding cooperation tool, which comprises a workbench 1, and support frames 103 are fixedly arranged on the workbench 1 in opposition; in an embodiment of the present embodiment, the support frames 103 can be fixed on the workbench 1 by welding or bolt connection;

[0047] Positioning plates 8 are arranged in opposition between the two support frames 103, and the two positioning plates 8 are connected with a first driving mechanism which drives them to move synchronously towards the inside or the outside; specifically, when welding two groups of mold frames, first place the two groups of mold frames between the two positioning plates 8, and then drive the two positioning plates 8 to move synchronously towards the inside by the first driving mechanism, thereby giving the mold frames a fixing force towards the inside, so that the connecting ends of the two mold frames are tightly fitted to form complete welds;

[0048] The side close to the two positioning plates 8 is circumferentially arranged with four groups of clamping plates 806 connected with the second driving mechanism for synchronous movement towards the inside or the outside. Specifically, in order to further improve the positioning stability of the positioning plate 8 to the mold frame, four groups of clamping plates 806 are arranged in the embodiment, and when the mold frame is located between the two positioning plates 8, the four groups of clamping plates 806 are respectively clamped with the four sides of the mold frame, and the second driving mechanism is used to synchronously drive the four groups of clamping plates 806 to move towards the inside and contact the mold frame, so as to realize the positioning of the mold frame.

[0049] In addition, the workbench 1 is also arranged with a rotating mechanism for driving the positioning plate 8 to rotate to adjust the weld angle. It can be explained that the welding head is located above the workbench 1, and due to the limited movement position of the welding head, only the connection end located above can be welded at a time. In the process of welding the mold frame in the embodiment, when the connection end located above is welded, the positioning plate 8 is driven to rotate by the rotating mechanism, and the positioning plate 8 synchronously drives the mold frame to rotate to realize the adjustment of the connection end of the mold frame on both sides. In the adjustment process, the mold frame does not need to be disassembled and reassembled, and the operation is more convenient.

[0050] Embodiment 2

[0051] Based on the embodiment 1, please refer to Figures 3-4 The first driving mechanism includes a positioning frame 101 fixedly arranged on the workbench 1, a lead screw 2 rotatably arranged between the two positioning frames 101, and a first motor 201 fixedly connected with the output end of the lead screw 2. The screw threads on the two sides of the lead screw 2 are opposite in direction. The nut 202 is screwingly arranged on the lead screw 2. The positioning rod 702 is fixedly arranged on the side away from the two positioning plates 8. The shaft sleeve 203 fixedly connected with the nut 202 is rotatably arranged on the positioning rod 702. It can be explained that when the positions of the two positioning plates 8 are adjusted, the first motor 201 is started to drive the lead screw 2 to rotate. The nut 202 moves on the lead screw 2 to drive the positioning rod 702 to move through the shaft sleeve 203. The positioning rod 702 synchronously drives the positioning plate 8 to move to realize the position adjustment.

[0052] The side close to the two positioning plates 8 is circumferentially arranged with four groups of L-shaped movable plates 805. The clamping plates 806 are slidably arranged on the L-shaped movable plates 805. The screw rod 804 is screwingly arranged on one side of the L-shaped movable plate 805. The clamping plate 806 is rotatably connected with the end of the screw rod 804. Specifically, the handle 803 is arranged at the other end of the screw rod 804. It can be explained that for the mold frames of different sizes, the positions of the clamping plates 806 need to be finely adjusted. The handle 803 is rotated to drive the screw rod 804 to rotate in the embodiment. The screw rod 804 drives the clamping plate 806 to synchronously move during the rotation to realize the position pre-adjustment of the clamping plate 806.

[0053] The second driving mechanism comprises four groups of sliding grooves 810 arranged on the positioning plate 8 in a circumferential array, and a sliding seat 812 fixedly connected with the L-shaped movable plate 805 is slidably arranged in the sliding groove 810. One side of the positioning plate 8 is rotatably arranged with a toothed disc 807, the toothed disc 807 is rotatably arranged on the positioning rod 702, and four groups of arc-shaped grooves 808 corresponding to the sliding grooves 810 are arranged on the toothed disc 807 in a circumferential array. The arc-shaped grooves 808 extend from the near disc center end to the far disc center end, and a pin shaft 809 fixedly connected with the sliding seat 812 is slidably arranged in the arc-shaped groove 808;

[0054] Please refer to Figures 5-6 A second motor 801 is arranged on one side of the positioning plate 8, and a first gear 802 engaged with the toothed disc 807 is fixedly connected to the output end of the second motor 801. In addition, an elastic mechanism fixedly connected with the sliding seat 812 is also arranged in the sliding groove 810. It can be explained that when the position of the clamping plate 806 is adjusted, the second motor 801 is started to drive the first gear 802 to rotate, the first gear 802 synchronously drives the toothed disc 807 to rotate, the toothed disc 807 drives the pin shaft 809 and the sliding seat 812 to move along the sliding groove 810 through the arc-shaped groove 808, and the sliding seat 812 synchronously drives the L-shaped movable plate 805 to move towards the inner side. At this time, the elastic mechanism is contracted to generate elastic force. When the second motor 801 is reversely rotated and reset, the L-shaped movable plate 805 and the clamping plate 806 are synchronously reset;

[0055] As a further scheme of the embodiment, the elastic mechanism comprises a guide rod 811 arranged in the sliding groove 810, and the sliding seat 812 is slidably arranged on the guide rod 811. A first spring 813 is arranged on the guide rod 811, one end of the first spring 813 is fixedly connected with the sliding seat 812, and the other end is fixedly connected with the guide rod 811. Specifically, the pin shaft 809 synchronously drives the sliding seat 812 to slide on the guide rod 811 in the process of moving, the sliding seat 812 synchronously drives the first spring 813 to stretch or contract, and the conversion of elastic force is realized;

[0056] Further, the positioning rod 702 is arranged as a hollow structure, the rotating mechanism comprises a driving rod 7 which is slidingly inserted into the positioning rod 702, a plurality of groups of strip-shaped clamping seats 701 are arranged on the driving rod 7 in a circumferential array, a plurality of groups of strip-shaped clamping grooves which are clamped with the strip-shaped clamping seats 701 are correspondingly arranged in the positioning rod 702, wherein the end of the driving rod 7 is provided with a second gear 6 which is engaged with the first gear rack 503, a bottom plate 5 is arranged on one side of the workbench 1, a driving cylinder 501 is arranged on the bottom plate 5, and the driving end of the driving cylinder 501 is synchronously engaged with the two first gear racks 503 through the support 502; it can be explained that when the angle of the positioning plate 8 is adjusted, the driving cylinder 501 drives the two first gear racks 503 to move through the support 502, and in the moving process of the first gear rack 503, the first gear rack 503 drives the positioning rod 702 to rotate through the engagement with the second gear 6, and the positioning rod 702 synchronously drives the positioning rod 702 and the positioning plate 8 to rotate through the strip-shaped clamping seat 701 and the strip-shaped clamping groove;

[0057] Please refer to Figure 7 Two groups of support plates 302 for supporting the mold frames are also arranged between the two positioning plates 8, and the support plates 302 are connected with a jacking mechanism which drives the support plates 302 to rise and fall on the workbench 1; it can be explained that before the two mold frames are welded, the two mold frames are first placed on the support plates 302 respectively, and the support plates 302 are adjusted to move upward to a specified height through the jacking mechanism, so that when the two positioning plates 8 are moved inward to position them, the mold frames can be located between the four clamping plates 806, and in this embodiment, the diameter of the support plate 302 is smaller than the width of the mold frame, so that the clamping plates 806 on the bottom side can support the mold frame;

[0058] When the mold frame is fixed through the clamping plate 806, in order to avoid interference of the support plate 302 when the mold frame is rotated, the jacking mechanism can drive the support plate 302 to reset in time after clamping is completed;

[0059] The jacking mechanism comprises a limiting plate 304 which is fixedly connected with the support plate 302, and a rack 303 is arranged on one side of the limiting plate 304, and the rack 303 is engaged with a second gear rack 301, wherein a third gear 3 which is engaged with the second gear rack 301 is fixedly arranged on the lead screw 2; it can be explained that when the two nuts 202 are synchronously moved inward on the lead screw 2, the lead screw 2 synchronously drives the third gear 3 to rotate, and the third gear 3 drives the second gear rack 301 to rise through the second gear rack 301 and the rack 303 when the third gear 3 rotates, so as to jack up the limiting plate 304 and the mold frame to a certain height;

[0060] As another implementation, the limiting plate 304 is provided as a hollow structure, wherein the rack 303 is fixedly connected with a piston slidably arranged in the limiting plate 304, and a second spring 306 fixedly connected with the piston is further arranged in the inner cavity of the limiting plate 304, and the other side of the limiting plate 304 is connected with the air inlet mechanism; it can be explained that, when the second rack 301 lifts the limiting plate 304 to a certain height, the air inlet mechanism sends air into the cavity, so that the air pressure drives the piston to slide in the cavity, and the piston drives the second rack 301 to lose engagement with the third gear 3 through the rack 303, and then the second rack 301 is lowered under the action of gravity, and the limiting plate 304 is reset;

[0061] The air inlet mechanism includes air inlet pipes 305 in communication with the cavity, wherein the cylinder 4 is arranged on one side of the two side support frames 103 close to each other, the cylinder 4 is arranged with a gas plug, the two side air inlet pipes 305 are respectively connected with main air pipes 404, the two ends of the two side main air pipes 404 are respectively communicated with the cylinder 4 through air conveying pipes 403, and the gas plug is connected with an adjusting mechanism for driving the gas plug to move in the cylinder 4; it can be explained that, when the adjusting mechanism drives the gas plug to move in the cylinder 4 towards the support frame 103, the gas in the cylinder 4 is extruded to the air conveying pipe 403 through the gas plug, and then is conveyed to the cavity through the main air pipe 404 and the air inlet pipe 305 to drive the piston to move; when the adjusting mechanism drives the gas plug to reset, the piston is driven to reset under the action of negative pressure, so that the second rack 301 can be re-engaged with the third gear 3;

[0062] The adjusting mechanism includes adjusting discs 9 arranged in the close direction of the two side positioning plates 8, wherein the driving rods 7 are synchronously provided as hollow mechanisms, the positioning rods 702 and the driving rods 7 are arranged with driving shafts 401 fixed with the adjusting discs 9, the driving shafts 401 are fixed with the gas plug, the third springs 402 are arranged on the driving shafts 401, one end of the third spring 402 is fixed with the driving shaft 401, and the other end is fixed with the cylinder 4; it can be explained that, when the two side positioning plates 8 are synchronously moved towards the inside to position the mold rack, the two side adjusting discs 9 first contact the mold rack, and then the adjusting disc 9 drives the driving shaft 401 to move horizontally under the action force of abutment, and the driving shaft 401 synchronously drives the gas plug to move; when the mold rack is processed, the third spring 402 drives the driving shaft 401 and the adjusting disc 9 to reset as the two side positioning plates 8 are synchronously away;

[0063] A first electrode ring is arranged on the adjusting disc 9 towards the positioning plate 8, and a second electrode ring 901 is correspondingly arranged on the positioning plate 8; specifically, when the first electrode ring contacts the second electrode ring 901, an electrical signal is generated to the first motor 201, and the first motor 201 stops driving the screw rod 2 to rotate.

[0064] In addition, a guide rod 102 is further arranged on the workbench 1, and the limiting plate 304 is slidably connected with the guide rod 102 to improve the stability of the limiting plate 304 in the vertical direction.

[0065] Embodiment 3

[0066] The repairing process of the mold frame welding cooperation tooling includes the following steps:

[0067] S1, first place the two mold frames on the support plate 302, adjust the support plate 302 to move up to the specified height by the jacking mechanism;

[0068] S2, the first driving mechanism drives the two positioning plates 8 to move synchronously towards the inside, giving the mold frame a fixed force towards the inside;

[0069] S3, the second driving mechanism synchronously drives the four sets of clamping plates 806 to move towards the inside to contact the mold frame, realizing the positioning of the mold frame;

[0070] S4, after the welding of the connecting end between the two mold frames in one direction is completed, the rotating mechanism drives the positioning plate 8 to rotate, and the positioning plate 8 synchronously drives the mold frame to rotate, so as to realize the adjustment of the connecting end of the two mold frames and realize the all-round welding.

[0071] In the description of the present application, it should be pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0072] The above has carried out the detailed description to one embodiment of the present application, but the content described is only the preferred embodiment of the present application, and cannot be considered as used for limiting the scope of the present application. Any equivalent changes and improvements made according to the scope of the present application should still belong to the patent coverage range of the present application.

Claims

1. A mold frame welding cooperation tool, comprising a workbench (1), support frames (103) are fixedly arranged on the workbench (1); positioning plates (8) are oppositely arranged between the support frames (103); the positioning plates (8) are connected with a first driving mechanism for driving the positioning plates (8) to move towards the inside or the outside synchronously; four groups of clamping plates (806) are circumferentially arranged on one side of the positioning plates (8) close to each other, and the clamping plates (806) are connected with a second driving mechanism for driving the clamping plates (806) to move towards the inside or the outside synchronously; a rotating mechanism is further arranged on the workbench (1), and the rotating mechanism is used for driving the positioning plates (8) to rotate to adjust the welding seam angle; wherein four groups of L-shaped movable plates (805) are circumferentially arranged on one side of the positioning plates (8) close to each other, and the clamping plates (806) are slidably arranged on the L-shaped movable plates (805); the first driving mechanism comprises positioning racks (101) fixedly arranged on the workbench (1) in opposition, and a lead screw (2) is rotatably arranged between the positioning racks (101), and the end of the lead screw (2) is fixedly connected with an output end of a first motor (201); wherein a nut (202) is sleeved on the lead screw (2) in opposition, positioning rods (702) are fixedly arranged on one side of the positioning plates (8) away from each other, and shaft sleeves (203) fixedly connected with the nut (202) are rotatably arranged on the positioning rods (702); two groups of support plates (302) for supporting the mold frame are oppositely arranged between the positioning plates (8), and the support plates (302) are connected with a jacking mechanism for driving the support plates (302) to ascend and descend on the workbench (1); the jacking mechanism comprises a limiting plate (304) fixedly connected with the support plates (302), a rack (303) arranged on one side of the limiting plate (304), and a second rack (301) engaged with the rack (303), wherein a third gear (3) engaged with the second rack (301) is fixedly arranged on the lead screw (2); the limiting plate (304) is provided in a hollow structure; wherein the rack (303) is fixedly connected with a piston slidably arranged in the limiting plate (304), a second spring (306) fixedly connected with the piston is further arranged in the limiting plate (304), and the other side of the limiting plate (304) is connected with an air inlet mechanism; the air inlet mechanism comprises air inlet pipes (305) in communication with cavities, wherein cylinder bodies (4) are arranged on one side of the support frames (103) close to each other, air plugs are arranged in the cylinder bodies (4), main air pipes (404) are respectively connected with the air inlet pipes (305), the cylinder bodies (4) are in communication with the main air pipes (404) through air conveying pipes (403) at both ends of the main air pipes (404), and the air plugs are connected with an adjusting mechanism for driving the air plugs to move in the cylinder bodies (4). characterized in that ​ ​ ​ ​ ​ ​ ​ ​ ​ The positioning rod (702) is arranged as a hollow structure, the rotating mechanism comprises a driving rod (7) which is arranged in sliding insertion with the positioning rod (702), a plurality of groups of strip-shaped clamping seats (701) are arranged in a circumferential array on the driving rod (7), and a plurality of groups of strip-shaped clamping grooves which are clamped with the strip-shaped clamping seats (701) are correspondingly arranged in the positioning rod (702); a second gear (6) is arranged at the end of the driving rod (7), the second gear (6) is engaged with the first gear rack (503), a bottom plate (5) is arranged on one side of the workbench (1), a driving cylinder (501) is arranged on the bottom plate (5), and the driving end of the driving cylinder (501) is synchronously engaged with the two first gear racks (503) through a support (502).

2. A mold nest welding fixture as defined in claim 1, wherein The second driving mechanism comprises four groups of sliding grooves (810) which are arranged in a circumferential array on the positioning plate (8), and a sliding seat (812) which is fixedly connected with the L-shaped movable plate (805) is slidably arranged in the sliding groove (810). The positioning plate (8) is rotatably arranged on one side of the positioning rod (702), four groups of arc-shaped grooves (808) which are correspondingly arranged with the sliding grooves (810) are arranged in a circumferential array on the toothed disc (807), the arc-shaped grooves (808) extend from the near-disc center end to the far-disc center end, and a pin shaft (809) which is fixedly connected with the sliding seat (812) is slidably arranged in the arc-shaped groove (808).

3. A mold nest welding fixture as defined in claim 2, wherein, The positioning plate (8) is arranged on one side of the positioning plate (8), and the first gear (802) is fixedly connected with the toothed disc (807).

4. The mold nest welding fixture of claim 1, wherein, The adjusting mechanism comprises an adjusting disc (9) which is arranged in a direction close to the two positioning plates (8). The driving rod (7) is synchronously arranged as a hollow mechanism, the positioning rod (702) and the driving rod (7) are arranged with a driving shaft (401) which is fixed with the adjusting disc (9), the driving shaft (401) is fixed with the air plug, a third spring (402) is arranged on the driving shaft (401), one end of the third spring (402) is fixed with the driving shaft (401), and the other end is fixed with the cylinder body (4).

5. A process for repairing a die set weld-up tooling as defined in claim 4, wherein, The method comprises the following steps: S1, first, the two mold frames are respectively arranged on the support plates (302), and the lifting mechanism adjusts the support plates (302) to move upward to a specified height; S2, the first driving mechanism drives the two positioning plates (8) to move synchronously toward the inside, so as to give the mold frame a fixing force toward the inside; S3, the second driving mechanism synchronously drives the four clamping plates (806) to move toward the inside to contact the mold frame, so as to realize the positioning of the mold frame; S4, after the welding of the connecting end between the two mold frames in one direction is completed, the rotating mechanism drives the positioning plate (8) to rotate, the positioning plate (8) synchronously drives the mold frame to rotate, so as to realize the adjustment of the connecting end of the two mold frames and realize all-round welding.

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