High-frequency reciprocating motion device for friction welding

Abstract

The high-frequency reciprocating motion device for friction welding comprises a rack and a driving motor gearbox set, a movable sliding block is installed on one side of the rack in a sliding mode, and clamping devices are installed on the two sides of the movable sliding block; an eccentric wheel B and an eccentric wheel A are rotatably mounted on the portion, above and below the movable sliding block, of the rack respectively, a transmission gear B coaxially rotating with the eccentric wheel B is arranged on the side, away from the eccentric wheel B, of the rack, and a transmission gear A coaxially rotating with the eccentric wheel B is arranged on the side, away from the eccentric wheel A, of the rack; and the clamping device drives a transmission gear C, and the transmission gear C is meshed with the transmission gear A and the transmission gear B respectively. Through gear transmission and an eccentric wheel-movable sliding block mechanism, high-frequency reciprocating motion of a welded part is achieved, high-frequency friction between the welded part and another static welded part is achieved, and finally welding of two parts is achieved; the friction welding device is suitable for super-long parts, special-shaped parts and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical equipment, and specifically to a high-frequency reciprocating motion device for friction welding. Background Art

[0002] Welding work is widely used in industries such as industry and construction, with various methods, types, and categories. The present invention is mainly applied to the linear friction welding process method and serves as the core mechanism device of this welding process method. Compared with other welding methods, friction welding has the characteristics of high welding quality, stability, reliability, high dimensional accuracy of welded parts, high efficiency, energy conservation, material conservation, low consumption, good weldability, environmental protection, and no pollution. Friction welding can be divided into rotary friction welding, friction stir welding, linear friction welding, etc. according to the implementation method.

[0003] The disadvantage of existing rotary friction welding equipment is that it is very difficult to weld those parts that are not easy to rotate at high speed (such as 12-meter-long steel bars) or irregular parts. Therefore, we propose a high-frequency reciprocating motion device for friction welding. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-frequency reciprocating motion device for friction welding to solve the problems in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A high-frequency reciprocating motion device for friction welding includes a frame and a driving motor gearbox group. A movable slider is slidably installed on one side of the frame, and clamping devices are installed on both sides of the movable slider; an eccentric wheel B and an eccentric wheel A are respectively rotatably installed above and below the movable slider on the frame. A transmission gear B that rotates coaxially with the eccentric wheel B is provided on one side of the frame away from the eccentric wheel B, and a transmission gear A that rotates coaxially with the eccentric wheel B is provided on one side of the frame away from the eccentric wheel A; the clamping device drives a transmission gear C, and the transmission gear C meshes with the transmission gear A and the transmission gear B respectively.

[0006] Preferably, two parallel guide rails are installed on one side of the frame, and the movable slider is slidably installed on the guide rails.

[0007] Preferably, the eccentric wheel A and the transmission gear A are installed on the same rotating shaft, the eccentric wheel B and the transmission gear B are installed on the same rotating shaft, and bearings that cooperate with the two rotating shafts are installed on the frame.

[0008] Preferably, the transmission gear A and the transmission gear B are parts of the same size.

[0009] Preferably, the eccentric wheel A and the eccentric wheel B are parts of the same size, and the eccentric wheel A and the eccentric wheel B rotate in the same direction.

[0010] Preferably, needle rollers are provided between the eccentric wheel A and the movable slider, and needle rollers are provided between the eccentric wheel B and the movable slider.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1. The upper and lower eccentric wheels are exactly the same, ensuring a continuous thrust on the movable slider and preventing it from losing contact. Needle rollers are provided between the eccentric wheel and the movable slider to ensure rolling friction between them, reducing component wear caused by friction.

[0013] 2. The reciprocating motion frequency of the movable slider can be adjusted by regulating the rotational speed of the servo motor. The servo motor can be quickly started and stopped, and the position accuracy at the stop can be ensured.

[0014] 3. Through a mechanical transmission type, the rotational motion of the servo motor is converted into a small-amplitude periodic reciprocating motion of the movable slider, thus realizing the most core high-frequency linear reciprocating motion device in a linear friction welding equipment. This device has a simple structure, high energy transfer efficiency, and is easy to maintain and repair. By adjusting the rotational speed of the servo motor, the welded part driven by the movable slider can be accurately controlled within an amplitude range of ±1 - ±3 mm and a frequency range of 1 Hz - 60 Hz, and the final stop position accuracy can be controlled within ±0.1 mm; with a fully mechanical transmission, the system operates reliably and has a low maintenance cost.

[0015] 4. According to the process conditions of friction welding and combining the characteristics of linear friction welding technology, this application realizes the high-frequency reciprocating motion of the welded part through a gear transmission and an eccentric wheel - movable slider mechanism, thereby achieving high-frequency friction with another stationary welded part and finally realizing the welding of the two parts. This high-frequency vibration device is especially suitable for friction welding equipment for ultra-long parts, special-shaped parts, etc. It can effectively improve the welding efficiency, reduce the floor area of the equipment, and save cost expenditures. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present invention and form a part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation to the present invention. In the drawings:

[0017] Figure 1 is the front view of the present invention;

[0018] Figure 2 is the side view of the present invention;

[0019] Figure 3 is the rear view of the present invention.

[0020] In the figure: 1. Eccentric wheel A; 2. Movable slider; 3. Clamping device; 4. Guide rail; 5. Eccentric wheel B; 6. Frame; 7. Driving gear A; 8. Driving motor gearbox group; 9. Driving gear C; 10. Driving gear B. Specific implementation mode

[0021] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0022] Please refer to Figures 1-3 , in an embodiment of the present invention, a high-frequency reciprocating motion device for friction welding includes a frame 6 and a driving motor gearbox group 8. A movable slider 2 is slidably installed on one side of the frame 6. Two parallel guide rails 4 are installed on one side of the frame 6. The movable slider 2 is slidably installed on the guide rails 4. Clamping devices 3 are installed on both sides of the movable slider 2;

[0023] An eccentric wheel B5 and an eccentric wheel A1 are respectively rotatably installed above and below the movable slider 2 on the frame 6. A driving gear B10 that rotates coaxially with the eccentric wheel B5 is provided on one side of the frame 6 away from the eccentric wheel B5. A driving gear A7 that rotates coaxially with the eccentric wheel B5 is provided on one side of the frame 6 away from the eccentric wheel A1; the eccentric wheel A1 and the driving gear A7 are installed on the same rotating shaft, the eccentric wheel B5 and the driving gear B10 are installed on the same rotating shaft, and bearings cooperating with the two rotating shafts are installed on the frame 6.

[0024] The clamping device 3 drives a driving gear C9. The driving gear C9 meshes with the driving gear A7 and the driving gear B10 respectively. The driving gear A7 and the driving gear B10 are parts of the same size. The eccentric wheel A1 and the eccentric wheel B5 are parts of the same size. The eccentric wheel A1 and the eccentric wheel B5 rotate in the same direction. The upper and lower eccentric wheels are exactly the same, ensuring that a thrust is always maintained on the movable slider and there is no separation of contact.

[0025] Needle rollers are provided between the eccentric wheel A1 and the movable slider 2, and needle rollers are provided between the eccentric wheel B5 and the movable slider 2, ensuring that rolling friction is maintained between the eccentric wheel and the movable slider to reduce component wear caused by friction.

[0026] The hydraulic cylinder in the dynamic clamping device 3 extends the piston rod together with the fixture, and clamps the welded parts synchronously on both sides. For different welded parts, the clamping force can be adjusted by the driving pressure of the hydraulic cylinder.

[0027] Start the main drive servo motor in the drive motor gearbox group 8, which will drive the transmission gear C9 to rotate, and at the same time drive the transmission gear A7 and the transmission gear B10 to rotate through the meshing relationship.

[0028] The transmission gear A7 and the eccentric wheel A1 are rigidly connected and can be regarded as a whole to rotate. It relies on the bearings installed on the frame 6 as supports and makes a rotational motion. The same applies to the transmission gear B10 and the eccentric wheel B5.

[0029] The transmission gear A7 and the transmission gear B10 are parts of the same size, and the eccentric wheel A1 and the eccentric wheel B5 are also parts of the same size.

[0030] Due to the above meshing and transmission relationships, the eccentric wheel A1 and the eccentric wheel B5 rotate in the same direction, which can drive the movable slider 2 equipped with the clamping device 3 to make a periodic linear reciprocating motion along the guide rail 4.

[0031] The frequency of the periodic linear reciprocating motion of the movable slider 2 is jointly determined by the servo motor speed, the gearbox speed ratio, and the speed ratios of the transmission gear C9 to the transmission gears A and B7, 10. During operation, if it is necessary to adjust this frequency, only the servo motor speed needs to be changed.

[0032] After welding is completed, the transmission mechanism is first locked, and the hydraulic cylinders on both sides in the clamping device 3 retract to release the welded parts after welding.

[0033] The working principle of the present invention is: the clamping device 3 clamps one end of the welded component by pressurization and always maintains the clamping pressure;

[0034] Start the main drive servo motor in the drive motor gearbox group 8. At this time, the transmission gear A, the transmission gear B, the transmission gear C and the eccentric wheel A, the eccentric wheel B rotate synchronously, and drive the movable slider 2 to make a reciprocating motion on the guide rail 4;

[0035] The frequency of the reciprocating motion is determined by the servo motor speed, the gearbox speed ratio, and the transmission gear speed ratio;

[0036] After the reciprocating motion stops, the clamping device 3 relaxes the welded component by depressurization, so that it can be removed from the vibration device under the action of the loading and unloading device.

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

Claims

1. A high-frequency reciprocating motion device for friction welding, comprising a frame (6) and a drive motor gearbox assembly (8), characterized in that: A movable slider (2) is slidably mounted on one side of the frame (6), and clamping devices (3) are mounted on both sides of the movable slider (2); The frame (6) is located above and below the movable slider (2) and is rotatably mounted with an eccentric wheel B (5) and an eccentric wheel A (1), respectively; a transmission gear B (10) that rotates coaxially with the eccentric wheel B (5) is disposed on the side of the frame (6) away from the eccentric wheel B (5); and a transmission gear A (7) that rotates coaxially with the eccentric wheel B (5) is disposed on the side of the frame (6) away from the eccentric wheel A (1); The clamping device (3) is driven by a transmission gear C (9), and the transmission gear C (9) is respectively meshed with the transmission gear A (7) and the transmission gear B (10).

2. A high-frequency reciprocating motion device for friction welding according to claim 1, characterized in that: Two parallel guide rails (4) are installed on one side of the frame (6), and the movable slider (2) is slidably installed on the guide rails (4).

3. A high-frequency reciprocating motion device for friction welding according to claim 1, characterized in that: The eccentric wheel A (1) and the transmission gear A (7) are mounted on the same rotating shaft, the eccentric wheel B (5) and the transmission gear B (10) are mounted on the same rotating shaft, and the frame (6) is provided with bearings matching the two rotating shafts.

4. A high-frequency reciprocating motion device for friction welding according to claim 1, characterized in that: The transmission gear A (7) and the transmission gear B (10) are parts of the same size.

5. A high-frequency reciprocating motion device for friction welding according to claim 1, characterized in that: The eccentric wheel A (1) and the eccentric wheel B (5) are parts of the same size, and the eccentric wheel A (1) and the eccentric wheel B (5) rotate in the same direction.

6. A high-frequency reciprocating motion device for friction welding according to claim 1, characterized in that: A needle roller is arranged between the eccentric wheel A (1) and the movable slider (2), and a needle roller is arranged between the eccentric wheel B (5) and the movable slider (2).

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