Aluminum alloy tube circumferential friction welding method and device
A technology of friction welding and aluminum alloy tubes, which is applied in welding equipment, welding/welding/cutting items, metal processing, etc., and can solve the problems of welding fixtures, welding equipment, bulky size, and complicated welding process, etc.
Active Publication Date: 2021-03-09
SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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Problems solved by technology
The welding process is relatively complicated, and the welding fixtures and welding equipment are bulky, which are usually suitable for the connection of large diameter thick wall high melting point material pipes
Method used
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Embodiment Construction
[0022] figure 1 It is a structural schematic diagram of the aluminum alloy pipe circumferential friction welding method and device of the present invention. The welding process can be divided into the following steps:
[0023] Assembly stage: Clamp the welded pipe 1 with the clamping upsetting device 4, install the detachable inner support device 8 into the inner wall of the pipe and perform splicing and assembly. Compress the pipe wall together; the friction element 5 resets in the radial direction, and makes limit contact with the radial limit device 6;
[0024] Pre-friction stage: the clamping upsetting device 4 drives the pipe to move axially with the inner support device 8 and the upsetting constraining mold 3, and contacts with the friction element; the external driving device drives the friction element 5 to rotate, and the friction element 5. The end face 10 connected with the pipe starts to realize relative movement;
[0025] Welding friction stage: the external dr...
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A circumferential friction welding method and device for aluminum alloy pipes, the friction element is located at the butt joint interface of the pipes to be welded, and is driven by a drive system to rotate around the pipe axis at high speed in the circumferential direction; the aluminum alloy pipes are clamped by an axial upsetting system, and Provide pressing force and upsetting force; the friction element and the end surface of the pipe produce heat by friction, and remove the oxide film. After the material enters the plastic state, the radial positioning mechanism removes the radial limit, and the friction element quickly draws under the action of centrifugal force. away from the friction zone. At the same time, the pipe upsetting system clamps the two ends of the pipe to move towards each other for upsetting, and the high-temperature plastic material is subjected to upsetting connection under the restraint of the inner support device of the pipe fitting and the upsetting forming die to form a joint. This method overcomes the difficulty that the traditional rotary friction welding method must be welded by rotating the material to be welded. Compared with the traditional radial friction welding, the device is simpler and does not require consumables and a radial pressing system. Welded joints are solid-phase connections with high joint strength and high efficiency.
Description
technical field [0001] The invention relates to a method and device for circumferential friction welding of an aluminum alloy tube, belonging to the field of welding. Background technique [0002] Because aluminum alloy tubes are easy to form and process, a large number of aluminum alloy tubes are used in the industry to manufacture various equipment, such as various propellant pipelines in the power system in the aerospace field, various pressurized pipelines, and various types of pressurized pipelines in space vehicles. Pipelines for thermal control, environmental control, and life support systems are also widely used in the electrical and electronic industries, chemical industries, etc. [0003] Usually, due to the excellent formability of aluminum alloy tubes, the tubes used often have complex shapes. This brings certain difficulties to the welding assembly of pipes. During welding, the pipes that have been formed or installed at one end cannot be rotated around their a...
Claims
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IPC IPC(8): B23K20/12
CPCB23K20/122B23K2101/06B23K2103/10
Inventor 封小松赵慧慧夏佩云陈长江李送斌刘明芳杨静王瑾
Owner SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY