Quick-change type welding clamp

Abstract

The utility model relates to the technical field of laser welding, and discloses a quick-change welding fixture, which comprises a fixture quick-change system, a fixture support, a cylinder air pipe joint and a welding workpiece, the fixture quick-change system is matched with equipment to realize quick tool change, the fixture quick-change system comprises a four-claw flange plate, and the four-claw flange plate is connected with the fixture support. The bottom of the four-claw flange plate is fixedly connected with a screw, the four-claw flange plate is fixedly connected with a quick-change base through the screw, the top of the clamp support is fixedly connected with a fixed air cylinder, and the inner side of the welding workpiece is fixedly connected with a positioning block. According to the utility model, through the error-proofing structure designed on the fixture, when a tool is installed, the raised part of a workpiece is in lap joint with the detection plate of the error-proofing structure, the other end of the detection plate moves upwards according to the lever principle and enters the detection range of the Balluff square sensor, the Balluff square sensor receives a signal display ON, and the installation square of the workpiece is judged to be correct; the workpiece may be welded.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding, in particular to a quick-change welding fixture. Background Art

[0002] Welding is a widely used joining process in modern manufacturing. As production demands continue to increase and diversify, the requirements for welding fixtures are becoming increasingly stringent. Prior to welding, the workpiece must be secured. Furthermore, the DQ200SF13 has dimensional and weld quality requirements, with a dimensional engineering limit of ±0.2. Large dimensional deviations can easily cause abnormal gearbox noise. Weld quality deviations can easily lead to material separation and weak welds, ultimately impacting end-user performance.

[0003] Current welding fixture equipment mainly places the workpiece to be welded at a specific position on the fixture, and uses positioning pins, positioning blocks or other positioning elements to ensure the accurate position of the workpiece in space. Various clamping mechanisms are used, such as bolts and nuts for manual fixtures, cylinders for pneumatic fixtures, hydraulic cylinders for hydraulic fixtures, etc., to apply sufficient clamping force to the workpiece to prevent the workpiece from moving or deforming during the welding process, provide a suitable support structure, and ensure that the workpiece will not bend, sink or other deformations due to its own gravity or welding stress during welding, and then carry out welding work.

[0004] Current welding fixture equipment has certain shortcomings. First, its accuracy is low during operation. It is suitable for welding workpieces with simple structures and cannot meet the welding needs of most welding workpieces. Operators need to use their hands to align the workpieces. Factors such as fatigue, inconsistency and the inherent limitations of human hands lead to inconsistent welding quality and certain errors, which can easily cause damage to the workpiece. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a quick-change welding fixture, which aims to improve the problems in the prior art of welding workpieces having errors during welding and having strong welding limitations.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a quick-change welding fixture, comprising a fixture quick-change system, the fixture bracket, a cylinder air pipe joint and a welding workpiece, the fixture quick-change system cooperates with the equipment to realize quick change of tooling, the fixture quick-change system comprises a four-claw flange, the bottom of the four-claw flange is fixedly connected with an M12 screw, the four-claw flange is fixedly connected to a quick-change base through the M12 screw, the top of the fixture bracket is fixedly connected with a fixed cylinder, the inner side of the welding workpiece is fixedly connected with a positioning block, the top of the welding workpiece is fixedly connected with a four-bar linkage, a TUNKERS cylinder, a cylinder connecting arm and a pressure head are arranged inside the four-bar linkage, an externally threaded air pipe joint 1 is installed below the fixture bracket, and a base assembly is installed below the equipment of the externally threaded air pipe joint 1, and the base assembly is used for support and connection;

[0007] As a further description of the above technical solution: an error-proofing mechanism is installed on the top of the clamp bracket, a detection plate and a Balluff square sensor are installed inside the error-proofing mechanism, a clamping mechanism is installed above the error-proofing mechanism, an M4 plunger and a groove are included in the clamping mechanism, a pressure plate is installed in the groove, and a Balluff column sensor is installed on the side of the clamping mechanism;

[0008] As a further description of the above technical solution: the detection plate is fixedly connected to the interior of the error-proofing mechanism, and the detection plate moves up and down inside the error-proofing mechanism. The Balluff square sensor cooperates with the detection plate to detect the position of the detection plate.

[0009] As a further description of the above technical solution: the base assembly includes the quick-change base, the top of the quick-change base is fixedly connected to the bottom of the device body, the bottom of the quick-change base is fixedly connected to the device base, the top of the quick-change base is fixedly connected to the air pipe structure, and the outer wall of the air pipe structure is installed with an external threaded air pipe joint 2;

[0010] As a further description of the above technical solution: the TUNKERS cylinder on the rear side of the four-bar linkage is fixedly connected to the connecting arm, and the inner wall of the pressure head is fixedly connected to the welding workpiece;

[0011] As a further description of the above technical solution: the top of the clamp bracket is fixedly connected to the fixed cylinder, and a Balluff code memory is installed below the clamp bracket. The Balluff code memory contains a hexadecimal code, and communication with the device is achieved through the code;

[0012] As a further description of the above technical solution: the side wall of the error-proofing mechanism is provided with the cylinder air pipe joint, the top of the upper structure of the quick-change base is fixedly connected with a pin, and the quick-change base is fixedly connected to the equipment base with an M screw;

[0013] As a further description of the above technical solution: an air duct is provided at the bottom of the four-claw flange, and a screw is provided at the bottom, a connecting rod is provided on the outer wall of the screw, and a tooling base is provided on the outer wall of the connecting rod.

[0014] The utility model has the following beneficial effects:

[0015] 1. This utility model, developed based on the DQ200SF13 welding fixture, secures the fixture by installing a quick-change connector at the bottom. Six bar of compressed air enters the four-jaw flange through an externally threaded air pipe connector. The four-jaw flange unlocking mechanism quickly and accurately releases the fixture, allowing it to be easily removed from the equipment. This significantly reduces line downtime and improves production efficiency.

[0016] 2. In the present invention, due to the error-proofing structure designed in the fixture, when the tooling is installed, the raised part of the workpiece overlaps with the detection plate of the error-proofing mechanism, and the other end of the detection plate moves upward due to the lever principle and enters the detection range of the Balluff square sensor. The Balluff square sensor receives the signal and displays ON, judging that the workpiece is installed in the correct square and the workpiece can be welded. Otherwise, it displays OFF and the workpiece needs to be reinstalled in the correct direction.

[0017] 3. The utility model reduces labor costs by incorporating a quick tool change system. This eliminates the need for a large number of workers to spend a long time disassembling and installing tooling, thus reducing labor hours. Furthermore, due to the faster replacement speed, the scrap rate is also reduced, thus reducing the waste of raw materials.

[0018] 4. The quick-change tooling system in this utility model ensures highly consistent machining accuracy after each tooling change through precise positioning and secure fixation. This effectively reduces quality fluctuations caused by tooling changes, improves product stability and reliability, and helps enhance the company's brand image and market reputation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional schematic diagram of a quick-change welding fixture proposed by the present invention;

[0020] Figure 2 This is a structural schematic diagram of a clamping mechanism of a quick-change welding fixture proposed in the present invention;

[0021] Figure 3This is a structural schematic diagram of the equipment base of a quick-change welding fixture proposed by the present invention;

[0022] Figure 4 This is a structural schematic diagram of a connecting arm of a quick-change welding fixture proposed by the present invention;

[0023] Figure 5 This is a schematic structural diagram of a pin shaft of a quick-change welding fixture proposed in the present invention;

[0024] Figure 6 This is a structural schematic diagram of a four-jaw flange of a quick-change welding fixture proposed by the present invention;

[0025] Figure 7 This is a structural diagram of an M16 screw of a quick-change welding fixture proposed in the present invention;

[0026] Figure 8 This is a structural schematic diagram of a connecting rod of a quick-change welding fixture proposed by the present invention;

[0027] Figure 9 This is a structural schematic diagram of a detection plate of a quick-change welding fixture proposed by the present invention.

[0028] Legend:

[0029] 1. Fixture quick-change system; 2. External threaded air pipe connector 1; 3. Fixture bracket; 4. Fixed cylinder; 5. Positioning block; 6. Four-bar linkage; 7. Welding workpiece; 8. Balluff encoder memory; 9. Error-proofing mechanism; 10. Clamping mechanism; 11. Balluff cylindrical sensor; 12. Cylinder air pipe connector; 13. Detection plate; 14. Balluff square sensor; 15. Pressure head; 16. Connecting arm; 17. TUNKERS cylinder; 18. Equipment base; 19. Quick-change base; 20. External threaded air pipe connector 2; 21. Pin; 22. Four-claw flange; 23. M16 screw; 24. M12 screw; 25. Air duct; 26. Screw; 27. Connecting rod; 28. Tooling base. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0031] Reference Figure 1-Figure 7, the utility model provides an embodiment: a quick-change welding fixture, including a fixture quick-change system 1, a fixture bracket 3 and a cylinder air pipe joint 12 and a welding workpiece 7, the fixture quick-change system 1 cooperates with the equipment to realize quick change of tooling, the fixture quick-change system 1 includes a four-claw flange 22, the bottom of the four-claw flange 22 is fixedly connected with an M12 screw 24, the four-claw flange 22 is fixedly connected to the quick-change base 19 through the M12 screw 24, the four-claw flange 5 and the quick-change base 2 are fixed by means of screws M127, the pin 4 is used to fix the tooling base 11, the screw 9 fixes the connecting rod 10, the air duct 8 and the flange 5 are communicated with each other, and the top of the fixture bracket 3 is fixedly connected It is connected to a fixed cylinder 4 to provide a stable clamping force. A positioning block 5 is fixedly connected to the inside of the welding workpiece 7, which can accurately position the welding workpiece 7 in the fixture, ensuring the position accuracy of the workpiece during the welding process, thereby ensuring that the size and shape after welding meet the design requirements. The top of the welding workpiece 7 is fixedly connected to a four-bar linkage 6. Through the combined movement of the connecting rods, the input movement can be converted into the required output movement, thereby achieving precise position adjustment and posture control of the workpiece by the fixture. A TUNKERS cylinder 17 is set inside the four-bar linkage 6. Through the telescopic movement of the cylinder, sufficient force is generated to clamp the workpiece, ensuring that the workpiece remains stable and motionless during the welding process. The cylinder is connected to the connecting arm 16 and the pressure head 15 to achieve the pressing effect. An external threaded air pipe connector 2 is installed below the fixture bracket 3 for connecting the air pipe, connecting the pipeline for transporting compressed air or other gases to the pneumatic components in the fixture, such as cylinders and pneumatic valves, to ensure smooth gas transmission. A base assembly is installed below the equipment of the external threaded air pipe connector 2, which is used for support and connection.

[0032] A poka-yoke mechanism 9 is mounted on top of the fixture bracket 3. Inside this mechanism are a detection plate 13 and a Balluff square sensor 14. The detection plate 13 detects the workpiece's accurate positioning in the fixture, ensuring it's in the correct welding position. The Balluff square sensor 14 precisely measures the distance between the workpiece and the sensor, providing accurate data to the control system for precise positioning and control. A clamping mechanism 10 is located above the poka-yoke mechanism 9 to provide a fixed connection. The clamping mechanism 10 contains an M4 plunger and a groove for mounting a pressure plate. A Balluff columnar sensor 11 is mounted on the side of the clamping mechanism 10.

[0033] A detection plate 13 is fixedly connected to the inside of the error-proofing mechanism 9 . The detection plate 13 moves up and down inside the error-proofing mechanism 9 . The Balluff square sensor 14 cooperates with the detection plate 13 to detect the position of the detection plate 13 .

[0034] Reference Figure 3-Figure 6The base assembly includes a quick-change base 19, which can quickly replace different fixture components or modules, reduce equipment downtime and adjustment time, thereby greatly improving production efficiency and adapting to the production needs of multiple varieties and small batches. The top of the quick-change base 19 is fixedly connected to the bottom of the equipment body, and the bottom of the quick-change base 19 is fixedly connected to the equipment base 18. The function of the equipment base 18 is to support and fix. The top of the quick-change base 19 is fixedly connected to the air pipe structure, and the outer wall of the air pipe structure is installed with an external threaded air pipe joint 20. The TUNKERS cylinder 17 on the rear side of the four-bar mechanism 6 is fixedly connected to the connecting arm 16. Through its specific shape and structure, the direction of force is converted to adapt to the layout of the fixture and the clamping requirements of the workpiece. The inner wall of the pressure head 15 is fixedly connected to the welding workpiece 7, and the top of the fixture bracket 3 is fixedly connected to the fixed cylinder 4. The bottom of the fixture bracket 3 is installed with a Balluff coding memory 8, which can better save data. The Balluff coding memory 8 contains hexadecimal code, and communicates with the device through coding.

[0035] Reference Figure 6-Figure 9 The side wall of the error-proofing mechanism 9 is provided with a cylinder air pipe joint 12 to realize the connection between the cylinder and the air pipe, ensuring that the gas can flow smoothly between the cylinder and other pneumatic components. The top of the upper structure of the quick-change base 19 is fixedly connected with a pin shaft 21 to realize the function of fixed connection. The quick-change base 19 and the equipment base 18 are fixedly connected with an M16 screw 23. The bottom of the four-claw flange 22 is provided with an airway 25 for gas circulation, and a screw 26 is provided at the bottom. The outer wall of the screw 26 is provided with a connecting rod 27 to achieve the connection effect. The outer wall of the connecting rod 27 is provided with a tooling base 28 for support and fixation.

[0036] Working principle: First, fix the fixture, clamp the quick-change system 1 and the bottom of the equipment by installing a quick-change joint to fix the fixture at the bottom of the fixture. Compressed air enters the four-claw flange 22 through the external threaded air pipe joint 12. The unlocking mechanism of the four-claw flange 22 will quickly and accurately release the fixture, so that the fixture can be easily removed from the equipment. When installing the fixture, the raised part of the workpiece overlaps with the detection plate of the error-proofing mechanism. The other end of the detection plate 13 moves upward due to the lever principle and enters the detection range of the Balluff square sensor 14. The Balluff square sensor 14 receives the signal and displays ON, and the judgment is If the workpiece is installed in the correct square, the workpiece can be welded. Otherwise, it will display OFF and the workpiece needs to be reinstalled in the correct direction. The equipment base 18 and the quick-change base 19 are fixedly connected with the help of M16 screws 23. The four-claw flange 22 and the quick-change base 9 are firmly fixed with screws M17. The pin 21 is used to fix the tooling base 28, and the screw 26 is used to tighten the connecting rod 27. The air duct 25 and the four-claw flange 22 are interconnected. When compressed air enters the air duct 25 of the four-claw flange 22 through the external threaded air pipe connector 20, the claws of the four-claw flange 22 will retract. The pin 21 plays the important role of fixing the tooling direction, effectively ensuring the accuracy of the tooling installation direction.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A quick-change welding fixture, comprising a fixture quick-change system (1), a fixture bracket (3), a cylinder air pipe joint (12) and a welding workpiece (7), characterized in that: The fixture quick-change system (1) cooperates with the equipment to realize quick change of tooling, and the fixture quick-change system (1) includes a four-claw flange (22), the bottom of the four-claw flange (22) is fixedly connected with an M12 screw (24), and the four-claw flange (22) is fixedly connected with a quick-change base (19) through the M12 screw (24). The top of the fixture bracket (3) is fixedly connected with a fixed cylinder (4), the inner side of the welding workpiece (7) is fixedly connected with a positioning block (5), and the top of the welding workpiece (7) is fixedly connected with a four-bar linkage (6), and the four-bar linkage (6) is provided with a TUNKERS cylinder (17), a cylinder connecting arm (16) and a pressure head (15) inside. An external threaded air pipe joint (2) is installed below the fixture bracket (3), and a base assembly is installed below the equipment of the external threaded air pipe joint (2), and the base assembly is used for support and connection.

2. The quick-change welding fixture according to claim 1, characterized in that: An error prevention mechanism (9) is installed on the top of the clamp bracket (3), and a detection plate (13) and a Balluff square sensor (14) are arranged inside the error prevention mechanism (9). A clamping mechanism (10) is arranged above the error prevention mechanism (9), and the clamping mechanism (10) contains an M4 plunger and a groove, and a pressure plate is installed in the groove. A Balluff columnar sensor (11) is installed on the side of the clamping mechanism (10).

3. The quick-change welding fixture according to claim 2, characterized in that: The detection plate (13) is fixedly connected to the interior of the error prevention mechanism (9), and the detection plate (13) moves up and down inside the error prevention mechanism (9). The Balluff square sensor (14) cooperates with the detection plate (13) to detect the position of the detection plate (13).

4. The quick-change welding fixture according to claim 3, characterized in that: The base assembly includes a quick-change base (19), the bottom of the quick-change base (19) is fixedly connected to the equipment base (18), the top of the quick-change base (19) is fixedly connected to the air pipe structure, and the outer wall of the air pipe structure is installed with an external threaded air pipe joint 2 (20).

5. The quick-change welding fixture according to claim 1, characterized in that: The TUNKERS cylinder (17) at the rear side of the four-bar linkage (6) is fixedly connected to the connecting arm (16), and the inner wall of the pressure head (15) is fixedly connected to the welding workpiece (7).

6. The quick-change welding fixture according to claim 1, characterized in that: The top of the clamp bracket (3) is fixedly connected to the fixed cylinder (4), and a Balluff encoding memory (8) is installed below the clamp bracket (3).

7. The quick-change welding fixture according to claim 4, characterized in that: The side wall of the anti-error mechanism (9) is provided with the cylinder air pipe joint (12), the top of the upper structure of the quick-change base (19) is fixedly connected with a pin shaft (21), and the quick-change base (19) and the equipment base (18) are fixedly connected with an M16 screw (23).

8. The quick-change welding fixture according to claim 1, characterized in that: The bottom of the four-claw flange (22) is provided with an air passage (25), and a screw rod (26) is provided at the bottom. The outer wall of the screw rod (26) is provided with a connecting rod (27), and the outer wall of the connecting rod (27) is provided with a tooling base (28).

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