Novel tool clamp for welding machine

Abstract

The invention discloses a novel tool clamp for a welding machine, and belongs to the technical field of tool clamps, the novel tool clamp comprises a workbench, the top of the workbench is fixedly provided with supporting plates in a symmetrical structure, the tops of the supporting plates are fixedly connected with a welding table, the top of the welding table is provided with a weldment main body, and the top of a movable block is connected with a clamping block in a buckled mode. The clamping blocks are located on the two sides of the weldment body, and cooling mechanisms are installed in the clamping blocks in an embedded mode. Through cooperation of the double-shaft motor, the threaded rod and the circular-truncated-cone-shaped blocking block, stepless precise adjustment of the clamping force of the clamping block is achieved, the clamping force deviation can be controlled within an extremely small range, the situation that a weldment is damaged or shifted due to improper clamping force is avoided, and the welding requirements of weldments of different materials, shapes and thicknesses are met; meanwhile, through linkage of the detection mechanism and the cooling mechanism, deformation of the weldment can be monitored in real time, heat can be quickly dissipated, a temperature field is effectively balanced, the device is particularly suitable for welding of precise parts sensitive to thermal deformation, the deformation error of the weldment is greatly reduced, and the welding precision is remarkably improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of tooling fixtures, and particularly relates to a novel tooling fixture for a welding machine. BACKGROUND

[0002] In modern manufacturing, welding processes are widely used in aerospace, automobile manufacturing, machining and many other fields. In the welding process, tooling fixtures are used to fix the position of welding parts, provide support, and ensure the stability of the welding parts during the welding process, thereby playing a fundamental role in ensuring the welding quality. With the development of product refinement and complexity, the traditional tooling fixtures gradually reveal limitations in coping with complex welding tasks, controlling welding deformation and precisely adjusting clamping force, and are difficult to meet the current efficient and high-quality welding production requirements.

[0003] Currently, the tooling fixtures for welding machines are mostly designed in a mechanical rigid clamping mode, such as fixing welding parts through bolt fastening and plate pressing.

[0004] The prior art has the following disadvantages: Long weld seam welding deformation problem: In the long weld seam welding scene, the existing tooling fixtures are mostly rigidly fixed. The workpiece expands due to heat during the welding process, and the two ends are limited by the fixture and cannot freely stretch and shrink, which easily causes longitudinal shrinkage stress in the workpiece. When the stress accumulates to a certain extent, the middle part of the workpiece will arch upward, resulting in serious welding deformation, Clamping force stress problem: The traditional tooling fixtures are difficult to achieve precise control in clamping force adjustment, whether in mechanical mode or in simple pneumatic or hydraulic adjustment. If the clamping force is too large, it will cause damage to the surface of the welding part, especially for thin-walled parts and materials prone to deformation, which may cause local deformation or even rupture of the welding part. If the clamping force is too small, the welding part cannot be effectively fixed, and the welding part is prone to displacement during the welding process, which affects the stability of the welding quality. In addition, during the entire welding process, the ideal clamping force should be dynamically adjusted as the temperature of the welding part changes and the material properties change. However, the existing tooling fixtures cannot respond to such changes in real time, and cannot provide suitable clamping force support for the welding process. SUMMARY

[0005] In order to overcome the above-mentioned defects, the application provides a novel tooling fixture for a welding machine, which solves the problems of long weld seam welding deformation and clamping force stress.

[0006] In order to achieve the above object, the present application provides the following technical scheme: a novel tool fixture for welding machine, comprising a workbench, a support plate is fixedly installed on the top of the workbench in a symmetrical structure, a welding table is fixedly connected to the top of the support plate, a welding piece main body is placed on the top of the welding table, gas cylinders are arranged on the left and right sides of the top of the workbench, a piston block is slidably connected to the inner side of the gas cylinder, a first connecting rod is fixedly connected to one end of the piston block, a connecting block is installed at the end of the first connecting rod, a movable block is arranged on the outer side of the connecting block, a clamping block is buckle-connected to the top of the movable block, the clamping block is arranged on both sides of the welding piece main body, and a cooling mechanism is embeddedly installed in the clamping block. A detection mechanism is connected to the outer side of the workbench through bolts, the detection mechanism is electrically connected with the cooling mechanism, connecting blocks are sealingly connected to the ends of the gas cylinders, a plug block is slidably connected in the connecting block, the plug block is in a circular truncated cone structure, a plurality of connecting rods are fixedly connected to the outer side of the plug block, second movable plates are arranged at the ends of the connecting rods, second connecting rods are fixedly connected to the two sides of the second movable plates in a symmetrical structure, first movable plates are installed between the second connecting rods, a double-shaft motor is arranged at the bottom of the welding table, a threaded rod is coaxially fixedly connected to the output end of the double-shaft motor, the threads on the threaded rod are opposite, the threaded rod penetrates through the first movable plates in a threaded manner, the first connecting rod is located in the middle of the second movable plate, and a circular groove for the first connecting rod is formed in the second movable plate.

[0007] As a further scheme of the present application, the cooling mechanism comprises a water guide pipe, the water guide pipe is in a multi-loop layout structure, and water inlets and outlets are connected to the two ends of the water guide pipe, respectively.

[0008] As a further scheme of the present application, limit blocks are fixedly installed on the two sides of the welding table, the limit blocks are in an L-shaped structure, protruding blocks for cooperating with the limit blocks are fixedly installed on the two sides of the movable block, and the limit blocks and the protruding blocks are slidably connected.

[0009] As a further scheme of the present application, a gas guide pipe is connected between the gas cylinders, the gas guide pipe is connected to a gas inlet pipe at a middle position, and installation grooves for the gas guide pipe and the gas inlet pipe are formed in the workbench.

[0010] As a further scheme of the present application, compression springs are fixedly connected to the inner sides of the gas cylinders at the other ends of the plug blocks, limit strips are arranged on the inner sides of the gas cylinders in a symmetrical structure, and sliding grooves for the limit strips are formed on the outer sides of the piston blocks.

[0011] As a further scheme of the present application: the sealing block is provided with a first sealing ring and a second sealing ring at two ends, the first sealing ring is located inside the sealing block, the second sealing ring is located outside the sealing block, the first sealing ring and the second sealing ring are both made of rubber material, and the outside of the sealing block is also wrapped with a rubber pad.

[0012] Compared with the prior art, the present application has the beneficial effects that: 1. The present application realizes stepless precise adjustment of clamping force of the clamping block through cooperation of the double-shaft motor, the threaded rod and the circular table type sealing block, can control clamping force deviation in a very small range, avoids damage or displacement of the welding part caused by improper clamping force, adapts to welding requirements of welding parts of different materials, shapes and thicknesses, and simultaneously, linkage of the detection mechanism and the cooling mechanism can realize real-time monitoring of welding part deformation and rapid heat dissipation, effectively balances the temperature field, is especially suitable for welding of precision parts sensitive to thermal deformation, greatly reduces welding part deformation error, and significantly improves welding precision. 2. The present application realizes leakage-free sealing of the air cylinder through self-locking characteristics of the threaded rod, cooperation of sealing rings at two ends of the sealing block and the rubber pad outside, can maintain stable air pressure and clamping force even for a long time, reduces welding quality problems caused by air pressure fluctuation, ensures linear movement of the piston through design of the limiting strip inside the air cylinder and the sliding groove of the piston block, improves movement precision and stability, in addition, the hidden symmetrical layout of the air guide pipe and the air inlet pipe saves space and avoids external interference, modular components are convenient for maintenance and replacement, effectively prolong the service life of the tool clamp, and reduce maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a first perspective view of the overall structure of the present application. Figure 2 It is a second perspective view of the overall structure of the present application. Figure 3 It is a first perspective view of the cross-sectional structure of the present application. Figure 4 It is a second perspective view of the cross-sectional structure of the present application. Figure 5 It is a main structure split effect schematic view of the present application. Figure 6 It is a first perspective view of the cross-sectional structure of the air cylinder of the present application. Figure 7 It is a second perspective view of the cross-sectional structure of the air cylinder of the present application. Figure 8 It is a Figure 7 It is a local enlarged effect schematic view of A in the present application.

[0014] In the diagram: 1. Workbench; 2. Support plate; 3. Welding table; 4. Main body of the weldment; 5. Inspection mechanism; 6. Air storage tank; 7. Air guide pipe; 8. Connecting block; 9. Movable block; 10. Clamping block; 11. Cooling mechanism; 12. Air inlet pipe; 13. Limiting block; 14. Water guide pipe; 15. Compression spring; 16. Piston block; 17. First connecting rod; 18. Sealing block; 19. Dual-axis motor; 20. Threaded rod; 21. First movable plate; 22. Second connecting rod; 23. Block; 24. Second movable plate; 25. Connecting rod; 26. First sealing ring; 27. Second sealing ring; 28. Mounting groove; 29. ​​Protrusion. Detailed Implementation

[0015] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0016] like Figures 1-8 As shown, the present invention provides a technical solution: A novel tooling fixture for welding machines includes a workbench 1. A support plate 2 is fixedly installed on the top of the workbench 1 in a symmetrical structure. A welding table 3 is fixedly connected to the top of the support plate 2. A workpiece body 4 is placed on the top of the welding table 3. Gas storage cylinders 6 are arranged on the left and right sides of the top of the workbench 1. A piston block 16 is slidably connected to the inner side of the gas storage cylinder 6. A first connecting rod 17 is fixedly connected to one end of the piston block 16. A connecting block 8 is installed at the end of the first connecting rod 17. A movable block 9 is arranged on the outer side of the connecting block 8. A clamping block 10 is snapped to the top of the movable block 9. The clamping block 10 is located on both sides of the workpiece body 4. A cooling mechanism 11 is embedded in the clamping block 10. The cooling component embedded in the clamping block 10 acts directly on the clamping part to quickly suppress local overheating. The workbench 1 is externally bolted with a detection mechanism 5, which cooperates with the cooling mechanism 11 to monitor and dissipate heat in real time, balance the temperature field of the welding part, and is electrically connected between the detection mechanism 5 and the cooling mechanism 11. The end of the gas cylinder 6 is sealed and connected with a connecting block 8, the connecting block 8 is slidably connected with a plug block 23, the plug block 23 is a circular truncated cone structure, the circular truncated cone plug block 23 is self-locking with the threaded rod 20 to realize no-leakage control of the gas passage, a plurality of connecting rods 25 are fixedly connected to the outer side of the plug block 23, the second movable plate 24 is arranged at the end of the connecting rod 25, the second movable plate 24 is fixedly connected with the second connecting rod 22 on both sides in a pair structure, the first movable plate 21 is installed between the second connecting rod 22, the double-shaft motor 19 is arranged at the bottom of the welding table 3, the mechanical transmission precision of the threaded rod of the double-shaft motor 19 is high, the pressure change rate can be accurately controlled through parameter setting, the flexible clamping driven by the gas pressure cooperates with the cooling and heat dissipation, the mechanical stress and thermal stress in the welding process are reduced, the threaded rod 20 is coaxially fixedly connected with the output end of the double-shaft motor 19, the threads on the threaded rod 20 are opposite, the threaded rod 20 is threaded through the first movable plate 21, the first connecting rod 17 is located in the middle of the second movable plate 24, and a circular slot for cooperating with the first connecting rod 17 is formed in the second movable plate 24; Specifically, in use, the welding part body 4 is placed on the welding table 3, the symmetrical supporting plates 2 provide stable support for the welding table 3, the gas cylinder 6, the piston block 16, the first connecting rod 17, the connecting block 8, the movable block 9 and the clamping block 10 constitute a linkage structure, the gas cylinder 6 is connected with a constant gas source, in the initial state, the plug block 23 closes the opening, the gas pressure in the gas cylinder 6 is stable, the piston block 16 is driven by the connecting rod mechanism to preliminarily clamp and fix the welding part under the action of the gas pressure, when it is necessary to adjust the clamping force, the double-shaft motor 19 is started, the threaded rod 20 at the output end of the double-shaft motor 19 rotates, since the threads on the threaded rod 20 are opposite, the first movable plate 21 moves towards or away from each other, the first movable plate 21 pushes the second movable plate 24 through the second connecting rod 22, the second movable plate 24 drives the plug block 23 to displace through the connecting rod 25, the plug block 23 adopts a circular truncated cone structure, the opening is opened when it is displaced, part of the gas in the gas cylinder 6 is discharged, the gas pressure is reduced, and the force acting on the piston block 16 is reduced, so that the clamping force of the clamping block 10 is accurately adjusted, the detection mechanism 5 monitors the deformation of the welding part body 4 in real time, once the bending or other abnormalities in the welding part are detected, the cooling mechanism 11 is immediately triggered through an electric signal, the multi-loop layout water pipes 14 in the cooling mechanism 11 quickly take away the heat of the clamping block 10, balance the temperature field of the welding part, prevent deformation caused by thermal stress, at the same time, after the double-shaft motor 19 stops working, the self-locking property of the threaded rod 20 makes the plug block 23 maintain the sealed state with the opening, the gas pressure in the gas cylinder 6 is maintained stable, and the clamping force is stable; The cooperation of the double-shaft motor 19, the threaded rod 20 and the plug 23 can steplessly adjust the clamping force, avoid damage to the welding part due to excessive clamping force, or displacement of the welding part due to insufficient clamping force, and control the clamping force deviation in a very small range, which is suitable for welding parts of different materials, shapes and thicknesses. The circular truncated cone structure of the plug 23 and the self-locking property of the threaded rod 20, in cooperation with the sealing rings at both ends and the rubber pads on the outside, realize the leakage-free sealing of the air cylinder 6, have high air pressure retention rate, can maintain stable clamping force even after long time work, reduce welding quality problems caused by air pressure fluctuation, and the linkage mechanism of the detection mechanism 5 and the cooling mechanism 11 can respond to the deformation of the welding part in real time, quickly dissipate heat to balance the temperature field, which is especially suitable for welding thin-walled parts, high-thermal-conductivity materials or precision parts sensitive to thermal deformation, controls the deformation error of the welding part within a low level, and improves the welding precision. The cooling mechanism 11 comprises a water guide pipe 14, the water guide pipe 14 has a multi-loop layout structure, and the water guide pipe 14 is connected with a water inlet and a water outlet at both ends respectively. Limiting blocks 13 are fixedly installed on both sides of the welding table 3, the limiting blocks 13 have an L-shaped structure, and protruding blocks 29 used in cooperation with the limiting blocks 13 are fixedly installed on both sides of the movable block 9, and the limiting blocks 13 and the protruding blocks 29 are in sliding connection. Specifically, the water guide pipe 14 adopts a multi-loop layout, prolongs the flow path of the cooling liquid in the clamping block 10, increases the exchange area with the clamping block 10, and at the same time, the multi-loop can cover the clamping block 10 domain with the cooling liquid, avoiding local heat dissipation blind area. The temperature of the contact area of the clamping block 10 can be quickly reduced during welding, balancing the thermal stress on both sides of the welding part, which is especially suitable for welding of thin-walled parts or high-thermal-conductivity materials (such as aluminum and copper), preventing deformation or cracks caused by local overheating. The circulation design of the water inlet and the water outlet can flexibly control the heat dissipation power by adjusting the cooling liquid flow, flow rate or temperature, adapt to the heat dissipation needs of different welding processes, and real-time adjust the cooling intensity according to different welding parameters (such as current and welding speed), avoiding excessive cooling leading to weld hardening or insufficient cooling leading to deformation, and improving process adaptability. The air guide pipes 7 are connected in communication between the air cylinders 6, the air guide pipes 7 are connected in communication with the air inlet pipes 12 at the middle position, the installation grooves 28 used in cooperation with the air guide pipes 7 and the air inlet pipes 12 are arranged in the workbench 1, the compressed springs 15 are fixedly connected to the inner sides of the air cylinders 6 at the other ends of the plugs 23, the limiting strips are arranged in the air cylinders 6 in a symmetrical structure, the sliding grooves used in cooperation with the limiting strips are arranged on the outer sides of the piston blocks 16, the first sealing rings 26 and the second sealing rings 27 are arranged at both ends of the plug 23, the first sealing rings 26 are arranged on the inner sides of the sealing blocks 18, the second sealing rings 27 are arranged on the outer sides of the sealing blocks 18, the first sealing rings 26 and the second sealing rings 27 are both made of rubber material, and the plug 23 is also wrapped with rubber pads on the outside. Specifically, the gas guide pipe 7 connects the two gas cylinders 6, the gas inlet pipe 12 is connected in the middle position, forming a symmetrical gas supply layout, when the gas inlet pipe 12 supplies gas, the gas enters the two gas cylinders 6 at the same time through the gas guide pipe 7, ensuring that the piston block 16 is uniformly stressed, the mounting groove 28 in the workbench 1 accommodates the gas guide pipe 7 and the gas inlet pipe 12, realizing hidden pipeline layout and avoiding external interference; the connection interface of the gas guide pipe 7 and the gas cylinder 6 adopts embedded connection, the symmetrical limiting strips in the gas cylinder 6 cooperate with the sliding grooves on the outer side of the piston block 16 to limit the rotation of the piston and only allow linear motion, the compression spring 15 provides elastic support between the block 23 and the inner side of the gas cylinder 6, pushes the block 23 when the gas pressure decreases, maintains the initial sealing state, the first sealing ring 26 is located on the inner side of the sealing block 18 to prevent high-pressure gas from leaking to the side of the piston block 16, the second sealing ring 27 is located on the outer side of the sealing block 18 to prevent external dust or water vapor from entering the gas cylinder 6, the rubber pad wrapped outside the block 23 forms a surface seal with the inner wall of the connecting block 8, and the sealing property of the gas passage is enhanced; The working principle of the present application is: Firstly, the welding part body 4 is placed on the welding table 3, the symmetrical supporting plates 2 provide stable support for the welding table 3, the gas cylinder 6 is connected to a constant gas pressure source, at this time, the circular cone-shaped block 23 seals the opening of the gas cylinder 6, the internal gas pressure is stable, the piston block 16 is driven by the gas pressure to preliminarily fix the welding part through the first connecting rod 17, the connecting block 8, the movable block 9 and the clamping block 10, and a stable clamping basis is formed. Secondly, when the clamping force needs to be adjusted, the double-shaft motor 19 is started to rotate the threaded rod 20, because the threaded rods 20 are oppositely threaded, the first movable plate 21 moves along or away from the threaded rod 20, pushes the block 23 to displace through the second connecting rod 22, the second movable plate 24 and the connecting rod 25, the opening of the gas cylinder 6 is opened by the movement of the circular cone-shaped block 23, the gas is discharged, the gas pressure is reduced, and the force acting on the piston block 16 is reduced, so that the clamping force of the clamping block 10 is accurately adjusted. It is worth mentioning that the detection mechanism 5 continuously monitors the deformation of the welding part body 4, and once the welding part is found to be bent or abnormal, the cooling mechanism 11 is triggered immediately through an electrical signal, in the cooling mechanism 11, the multi-circuit layout of the water guide pipe 14 quickly takes away the heat of the clamping block 10, balances the temperature field of the welding part, at the same time, after the double-shaft motor 19 stops working, the self-locking property of the threaded rod 20 cooperates with the sealing rings at both ends of the block 23 and the rubber pad on the outer side to ensure that the gas cylinder 6 is sealed and the stable clamping force is maintained, in addition, the limiting strips in the gas cylinder 6 cooperate with the sliding grooves of the piston block 16 to limit the rotation of the piston and ensure the accuracy of movement; the symmetrical layout of the gas guide pipe 7 and the gas inlet pipe 12 and the hidden installation ensure uniform gas supply and save space. Finally, after the welding is completed, the double-shaft motor 19 is reversed, the block 23 is reset by the threaded rod 20, the compression spring 15 assists it to return to the initial sealing position, the gas pressure of the gas cylinder 6 is reduced, the clamping block 10 releases the welding part, and the next welding operation is prepared.

[0017] While the preferred embodiments of the application have been described above, it will be understood that many modifications and variations will be apparent to those skilled in the art, which do not depart from the true spirit and scope of the present application.

Claims

1. A new type of tooling fixture for welding machine comprising a worktable (1), characterized in that: The top of the workbench (1) is fixedly provided with a support plate (2) in a symmetrical structure, the top of the support plate (2) is fixedly connected with a welding table (3), the top of the welding table (3) is placed with a welding body (4), the left and right sides of the top of the workbench (1) is provided with a gas cylinder (6), the inner side of the gas cylinder (6) is slidably connected with a piston block (16), one end of the piston block (16) is fixedly connected with a first connecting rod (17), the end of the first connecting rod (17) is provided with a connecting block (8), the outer side of the connecting block (8) is provided with a movable block (9), the top of the movable block (9) is buckled with a clamping block (10), the clamping block (10) is located on both sides of the welding body (4), and the clamping block (10) is embeddedly provided with a cooling mechanism (11). The outer side of the workbench (1) is connected with a detection mechanism (5) through bolts, the detection mechanism (5) and the cooling mechanism (11) are electrically connected, the end of the gas cylinder (6) is sealingly connected with a connecting block (8), the connecting block (8) is slidably connected with a plug block (23), the plug block (23) is a circular truncated cone structure, the outer side of the plug block (23) is fixedly connected with a plurality of connecting rods (25), the end of the connecting rod (25) is provided with a second movable plate (24), the two sides of the second movable plate (24) are fixedly connected with a second connecting rod (22) in a symmetrical structure, the second connecting rod (22) is provided with a first movable plate (21), the bottom of the welding table (3) is provided with a double-shaft motor (19), the output end of the double-shaft motor (19) is coaxially fixedly connected with a threaded rod (20), the threads on the threaded rod (20) are opposite, the threaded rod (20) is threaded through the first movable plate (21), the first connecting rod (17) is located in the middle of the second movable plate (24), and the second movable plate (24) is provided with a circular slot matched with the first connecting rod (17).

2. A novel fixture clamp for welding machine as claimed in claim 1, wherein: The cooling mechanism (11) comprises a water guide pipe (14), the water guide pipe (14) is arranged in a multi-loop layout structure, and the two ends of the water guide pipe (14) are respectively connected with a water inlet and a water outlet.

3. A novel fixture clamp for welding machine as claimed in claim 2, wherein: The two sides of the welding table (3) are fixedly provided with a limiting block (13), the limiting block (13) is an L-shaped structure, the two sides of the movable block (9) are fixedly provided with a protruding block (29) matched with the limiting block (13), and the limiting block (13) and the protruding block (29) are slidably connected.

4. A novel fixture clamp for welding machine as claimed in claim 3, wherein: The gas cylinder (6) is connected with a gas guide pipe (7) in communication, the gas guide pipe (7) is connected with an air inlet pipe (12) in communication at the middle position, and the workbench (1) is provided with a mounting groove (28) matched with the gas guide pipe (7) and the air inlet pipe (12).

5. A novel fixture for welding machine as claimed in claim 4, wherein: The other end of the plug block (23) is fixedly connected with a compression spring (15) inside the gas cylinder (6), the gas cylinder (6) is provided with a limiting strip in a symmetrical structure, and the outer side of the piston block (16) is provided with a sliding groove matched with the limiting strip.

6. A novel fixture for welding machine as claimed in claim 5, wherein: The plug (23) is provided with a first sealing ring (26) and a second sealing ring (27) at both ends, the first sealing ring (26) is located inside the sealing block (18), the second sealing ring (27) is located outside the sealing block (18), the first sealing ring (26) and the second sealing ring (27) are made of rubber material, and the outside of the plug (23) is also wrapped with a rubber pad.

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