Part clamping mechanism for friction welding

Abstract

The utility model relates to the technical field of friction welding clamps, in particular to a part clamping mechanism for friction welding, which comprises an electric cabinet mounted on the left side of a machining table, and a clamping mechanism for supporting and fixing special-shaped workpiece welding is arranged on the machining table. And a fixing mechanism for performing auxiliary fixing on the special-shaped workpiece is arranged on the clamping mechanism. The electromagnet is used for generating a magnetic field, so that the magnetorheological fluid in the rubber air bag is high-viscosity and low-fluidity Bingham fluid due to the characteristic of low-viscosity Newtonian fluid when the magnetic field is applied externally, a cavity at the bottom of a special-shaped workpiece is filled, stable support is provided for the special-shaped workpiece, welding work is more convenient to carry out, and welding efficiency is improved. Magnetorheological fluid is supplemented into the rubber air bag through the liquid injection assembly so as to adapt to cavities in the bottoms of special-shaped workpieces of different sizes, the application range of the equipment is widened, meanwhile, the two sides of the special-shaped workpieces are clamped and fixed through the clamping assembly, and meanwhile the rubber air bag is limited.

Description

Technical Field

[0001] The utility model relates to the technical field of friction welding jigs, in particular to a part clamping mechanism for friction welding. Background Art

[0002] Friction welding refers to a welding method that uses the heat generated by the friction of the workpiece contact surface as the heat source, and makes the workpiece plastically deformed under the action of pressure for welding. After years of development, friction welding technology has developed many classifications of friction welding: friction stud welding, friction surfacing, third-body friction welding, insert friction welding, inertia friction welding, friction stir welding, radial friction welding, linear friction welding, friction stir lap welding, etc.

[0003] For example, a friction stir welding double-sided welding clamping mechanism disclosed in the Chinese patent with the public number CN220498051U clamps and positions parts through fastening clamps, firmly fixes the parts on the clamping substrate, and forms negative pressure by sucking the air inside the suction cup through the provided air pump interface, and firmly adsorbs the parts on the sealing gasket to prevent the parts from shaking during the processing.

[0004] However, the friction stir welding double-sided welding clamping mechanism in the above application can only clamp and fix workpieces with a square structure. When facing the welding of special-shaped workpieces, such as welding a workpiece with a trapezoidal structure to a steel plate, the bottom of the connection between the two will be in a suspended state. At this time, it is impossible to use the fastening clamp to clamp and fix the two, thus affecting the welding process. Therefore, its scope of application is limited and there are certain limitations. Summary of the Utility Model

[0005] Aiming at the deficiencies of the prior art, the utility model provides a part clamping mechanism for friction welding, solves the technical problem that the existing welding jigs can only clamp and fix workpieces with a square structure and have a narrow scope of application, and achieves the purpose of expanding the scope of application of the welding jig.

[0006] To solve the above technical problems, the utility model provides the following technical solutions: A part clamping mechanism for friction welding, including an electric control box installed on the left side of the processing table for controlling the operation of the equipment, a clamping mechanism for supporting and fixing the welding of special-shaped workpieces is arranged on the processing table, and a fixing mechanism for assisting in fixing the special-shaped workpieces is arranged on the clamping mechanism.

[0007] The clamping mechanism includes a rubber airbag installed on the processing table, magnetorheological fluid is filled inside the rubber airbag, installation grooves are respectively opened on the front and rear sides of the upper surface of the processing table, and electromagnets are installed inside, a liquid injection component for injecting magnetorheological fluid into the rubber airbag is arranged inside the processing table, and a clamping component for limiting the rubber airbag and at the same time clamping and fixing the special-shaped workpiece is arranged on the processing table.

[0008] Preferably, the liquid injection assembly includes a liquid storage tank installed inside the processing table. The inside of the liquid storage tank is also filled with magnetorheological fluid. A liquid delivery pipe is installed on the left side inside the liquid storage tank, and its top extends into the inside of the rubber airbag. A booster pump is arranged outside the liquid delivery pipe. The return pipe is installed on the right side of the rubber airbag, and its bottom extends into the inside of the liquid storage tank. An electric sealing valve is installed on the return pipe.

[0009] Preferably, the clamping assembly includes a driving motor installed on the processing table. The output end of the driving motor is connected with a transmission member. Two clamping plates for clamping and fixing both sides of the special-shaped workpiece are respectively installed on the transmission member. A limiting sliding groove for the synchronous movement of the clamping plate is opened on the processing table. The clamping plate is threadedly connected with the transmission.

[0010] Preferably, an electric lifting rod is installed inside the processing table. The free end of the electric lifting rod is connected with a jacking plate for blocking and limiting the front side of the rubber airbag.

[0011] Preferably, the fixing mechanism includes L-shaped support plates fixedly connected to the front and rear sides of the top of the clamping plate. An electric push rod is installed on the top of the L-shaped support plate, and its output end penetrates through the L-shaped support plate and is connected with an abutting fixing block.

[0012] Preferably, a sliding cavity is opened on the output end of the electric push rod. An electric contact is installed on the top wall of the sliding cavity. An elastic cord is installed at the bottom of the electric contact. The other end of the elastic cord is connected with a magnetic pole sliding rod, and the magnetic pole sliding rod can slide up and down in the sliding cavity.

[0013] By means of the above technical solution, the present utility model provides a part clamping mechanism for friction welding, which at least has the following beneficial effects:

[0014] 1. When the electromagnet is energized, a magnetic field is generated in the present utility model, so that the magnetorheological fluid inside the rubber airbag changes from the Newtonian fluid characteristic of low viscosity to the Bingham fluid characteristic of high viscosity and low fluidity under the applied magnetic field, thereby filling the bottom cavity of the special-shaped workpiece and providing stable support for it, which is more convenient for the welding work.

[0015] 2. The present utility model replenishes the magnetorheological fluid into the rubber airbag through the liquid injection assembly to adapt to the cavities at the bottoms of special-shaped workpieces of different sizes, improving the applicable range of the device. At the same time, the clamping assembly is used to clamp and fix both sides of the special-shaped workpiece and limit the rubber airbag at the same time.

[0016] 3. The utility model presses and holds from the top of the workpiece by pushing the abutting fixed block downward through an electric push rod, further improving the stability of welding. Moreover, the cooperation between the magnetic pole sliding rod and the electric contact avoids excessive downward pressure of the abutting fixed block, causing one side of the workpiece to tilt up, thereby affecting the friction welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present application, form a part of the present application, and the illustrative embodiments and descriptions thereof are used to explain the present application, without unduly limiting the present application.

[0018] In the drawings:

[0019] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 is a schematic diagram of the partial sectional and disassembled structure of the clamping mechanism of the present utility model;

[0021] Figure 3 is a schematic diagram of the sectional structure of the clamping assembly of the present utility model;

[0022] Figure 4 is a schematic diagram of the internal structure of the front end of the processing table of the present utility model in section;

[0023] Figure 5 is a schematic diagram of the independent sectional structure of the fixing mechanism of the present utility model.

[0024] In the figure: 1. Processing table; 2. Electric control box; 3. Clamping mechanism; 301. Rubber air bag; 302. Electromagnet; 303. Liquid injection assembly; 3031. Liquid storage tank; 3032. Booster pump; 3033. Liquid infusion pipe; 3034. Return pipe; 3035. Electric sealing valve; 304. Clamping assembly; 3041. Driving motor; 3042. Transmission part; 3043. Clamping plate; 3044. Electric lifting rod; 3045. Jacking plate; 4. Fixing mechanism; 401. L-shaped support plate; 402. Electric push rod; 403. Abutting fixed block; 404. Electric contact; 405. Elastic cord; 406. Magnetic pole sliding rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] Embodiment 1

[0027] Based on the problem that the existing technologies currently available can only adapt to clamping and fixing workpieces with regular structures, and when facing welding of irregular workpieces, it is impossible to clamp and fix the two well, thus affecting the progress of welding. This embodiment provides a part clamping mechanism for friction welding. Please refer to Figures 1 - 5 , this embodiment provides a part clamping mechanism for friction welding, which can weld irregular workpieces. When welding a workpiece with a trapezoidal structure and a steel plate, for example, the bottom suspended position at the joint of the two is filled and supported to adapt to different welding situations and improve the applicable range of the equipment. The part clamping mechanism for friction welding includes an electric control box 2 installed on the left side of the processing table 1 for controlling the operation of the equipment. A clamping mechanism 3 for supporting and fixing the welding of irregular workpieces is arranged on the processing table 1. A fixing mechanism 4 for auxiliary fixing of irregular workpieces is arranged on the clamping mechanism 3. The irregular workpiece and the steel plate are placed on the processing table 1, and their welding surfaces are aligned and fitted. The cavity at the bottom of the joint of the two is filled and supported by the clamping mechanism 3, and the two are fixed synchronously from both sides and the front of the workpiece to prevent the two from collapsing or displacing during welding, thus affecting the progress of welding. The setting of the fixing mechanism 4 presses and fixes the two on the clamping mechanism 3 from the top of the workpiece, further improving the clamping stability.

[0028] Since the existing technology, when facing the welding of irregular workpieces, such as welding a workpiece with a trapezoidal structure and a steel plate, the bottom of the joint of the two will be in a suspended state, and conventional clamping mechanisms cannot clamp and fix it. Therefore, a clamping mechanism 3 that can support and fix irregular workpieces is proposed. The clamping mechanism 3 includes a rubber airbag 301 installed on the processing table 1. The inside of the rubber airbag 301 is filled with magnetorheological fluid. Installation grooves are respectively opened on the front and rear sides of the upper surface of the processing table 1, and electromagnets 302 are installed inside. A liquid injection component 303 for injecting magnetorheological fluid into the rubber airbag 301 is arranged inside the processing table 1. A clamping component 304 for limiting the rubber airbag 301 and simultaneously clamping and fixing irregular workpieces is arranged on the processing table 1. When the trapezoidal workpiece and the steel plate are respectively placed on the rubber airbag 301 and their welding surfaces are fitted, then the electromagnet 302 is powered on to generate a magnetic field. As the magnetic field increases, the magnetorheological fluid inside the rubber airbag 301 changes from the Newtonian fluid characteristic of low viscosity to a Bingham fluid with high viscosity and low fluidity under the applied magnetic field, thereby filling the cavity at the joint of the two and providing stable support for it, making it more convenient for the welding work to proceed.

[0029] When welding workpieces of different sizes, the injection assembly 303 includes a liquid storage tank 3031 installed inside the processing table 1. The interior of the liquid storage tank 3031 is also filled with magnetorheological fluid. A liquid infusion tube 3033 is installed on the left side of the liquid storage tank 3031, and its top extends to the inside of the rubber airbag 301. A booster pump 3032 is arranged outside the liquid infusion tube 3033. A return pipe 3034 is installed on the right side of the rubber airbag 301, and its bottom extends into the liquid storage tank 3031. Inside the box 3031, an electric sealing valve 3035 is installed on the return pipe 3034. The boost pump 3032 is started to pump the magnetorheological fluid inside the liquid storage tank 3031 to the inside of the rubber airbag 301 through the infusion pipe 3033 until the magnetorheological fluid props up the rubber airbag 301 and fills the cavity at the welding point of the workpiece. When the welding is completed, the electric sealing valve 3035 is opened to guide the excess magnetorheological fluid inside the rubber airbag 301 into the inside of the liquid storage tank 3031 through the return pipe 3034.

[0030] When the magnetorheological fluid is added to the rubber airbag 301, in order to avoid disorderly expansion of the rubber airbag 301, the rubber airbag 301 is limited by the clamping assembly 304. The clamping assembly 304 includes a driving motor 3041 installed on the processing table 1. The output end of the driving motor 3041 is connected to a transmission member 3042. The transmission member 3042 is respectively provided with two clamping plates 3043 for clamping and fixing the two sides of the special-shaped workpiece. A limiting slide groove that cooperates with the clamping plate 3043 for synchronous movement is provided on the processing table 1, and the clamping plate 3043 and the transmission member 3042 are threadedly connected.

[0031] An electric lifting rod 3044 is installed inside the processing table 1, and the free end of the electric lifting rod 3044 is connected to a lifting plate 3045 that blocks and limits the front side of the rubber airbag 301. The driving motor 3041 is started to drive the screw in the transmission member 3042 to rotate, and the left and right sides of the screw are respectively provided with positive and negative threads, thereby driving the threaded slides on the left and right sides of the screw to move relatively along the inner walls of the limiting slide groove, thereby driving the clamping plate 3043 on the top of the threaded slide to move relatively, clamp and fix the workpiece from both sides, and limit the rubber airbag 301. At the same time, the electric lifting rod 3044 is driven to lift the lifting plate 3045. On the one hand, it can lift and support the steel plate to save workers' physical strength, and on the other hand, it can limit the rubber airbag 301 from the front.

[0032] Example 2

[0033] On the basis of Example 1, Figures 1 - 5As shown in the figure, to prevent the workpiece from being displaced under force during friction welding, the device is also provided with a fixing mechanism for assisting in pressing and positioning. The fixing mechanism 4 includes L-shaped support plates 401 fixedly connected to the front and rear sides of the top of the clamping plate 3043. An electric push rod 402 is installed on the top of the L-shaped support plate 401, and its output end penetrates through the L-shaped support plate 401 and is connected to an abutting fixed block 403.

[0034] A sliding cavity is formed in the output end of the electric push rod 402. An electric contact 404 is installed on the top wall of the sliding cavity. An elastic cord 405 is installed at the bottom of the electric contact 404. The other end of the elastic cord 405 is connected to a magnetic pole sliding rod 406, and the magnetic pole sliding rod 406 can slide up and down in the sliding cavity. Driving the electric push rod 402 to move downward, thereby driving the abutting fixed block 403 to move downward to press and fix the workpiece from the top, preventing it from being displaced during friction welding. As the abutting fixed block 403 contacts the surface of the workpiece, the thrust generated by the contact between the two pushes the magnetic pole sliding rod 406 connected to the top of the abutting fixed block 403 to slide into the interior of the sliding cavity at the bottom of the electric push rod 402 until the magnetic pole at its top contacts the electric contact 404 on the top wall of the sliding cavity, thereby sending an electric signal to the electric control box 2. At this time, the electric push rod 402 stops moving downward, thereby preventing the abutting fixed block 403 from pressing excessively and causing one side of the workpiece to tilt, which will affect the progress of friction welding.

[0035] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A parts clamping mechanism for friction welding, comprising an electric control box (2) mounted on the left side of a processing table (1) for controlling the operation of the equipment, characterized in that: The processing table (1) is provided with a clamping mechanism (3) for supporting and fixing the special-shaped workpiece during welding, and the clamping mechanism (3) is provided with a fixing mechanism (4) for auxiliary fixing the special-shaped workpiece; The clamping mechanism (3) comprises a rubber airbag (301) mounted on a processing table (1), the interior of the rubber airbag (301) being filled with magnetorheological fluid, the upper surface of the processing table (1) being provided with mounting grooves on both the front and rear sides, and an electromagnet (302) being mounted therein, the interior of the processing table (1) being provided with a liquid injection component (303) for injecting magnetorheological fluid into the rubber airbag (301), and the processing table (1) being provided with a clamping component (304) for limiting the position of the rubber airbag (301) and clamping and fixing a special-shaped workpiece at the same time.

2. A parts clamping mechanism for friction welding according to claim 1, characterized in that: The liquid injection assembly (303) comprises a liquid storage tank (3031) installed inside the processing table (1), the interior of the liquid storage tank (3031) is also filled with magnetorheological fluid, a liquid infusion tube (3033) is installed on the left side of the interior of the liquid storage tank (3031), and the top of the liquid infusion tube extends to the interior of the rubber airbag (301), a booster pump (3032) is arranged outside the liquid infusion tube (3033), a return pipe (3034) is installed on the right side of the rubber airbag (301), and the bottom of the return pipe extends into the interior of the liquid storage tank (3031), and an electric sealing valve (3035) is installed on the return pipe (3034).

3. The part clamping mechanism for friction welding according to claim 1, characterized in that: The clamping assembly (304) comprises a driving motor (3041) mounted on a processing table (1); the output end of the driving motor (3041) is connected to a transmission member (3042); two clamping plates (3043) for clamping and fixing two sides of a special-shaped workpiece are respectively mounted on the transmission member (3042); a limiting slide groove for synchronous movement with the clamping plates (3043) is provided on the processing table (1); and the clamping plates (3043) are threadedly connected to the transmission member (3042).

4. The part clamping mechanism for friction welding according to claim 1, characterized in that: An electric lifting rod (3044) is installed inside the processing table (1), and the free end of the electric lifting rod (3044) is connected to a lifting plate (3045) that blocks and limits the front side of the rubber airbag (301).

5. The part clamping mechanism for friction welding according to claim 3, characterized in that: The fixing mechanism (4) comprises an L-shaped support plate (401) fixedly connected to the front and rear sides of the top of the clamping plate (3043); an electric push rod (402) is installed on the top of the L-shaped support plate (401), and its output end passes through the L-shaped support plate (401) and is connected to an abutting fixing block (403).

6. A parts clamping mechanism for friction welding according to claim 5, characterized in that: A sliding cavity is provided on the output end of the electric push rod (402), an electric contact (404) is installed on the top wall of the sliding cavity, an elastic rope (405) is installed at the bottom of the electric contact (404), the other end of the elastic rope (405) is connected to a magnetic pole slide bar (406), and the magnetic pole slide bar (406) can slide up and down in the sliding cavity.

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