Device and method for extracting broken needles of friction stir welding
A friction stir welding and extraction device technology, which is applied in the field of aviation machinery, can solve the problems of scrapped parts, inaccurate judgment, slag inclusion and excessive wound surface, etc., and achieve the effects of improving production efficiency, high economy and ensuring welding quality
Active Publication Date: 2020-08-11
SHAANXI AIRCRAFT CORPORATION
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Problems solved by technology
[0003] Purpose of the invention: In order to solve the above technical problems, a set of quick friction stir welding extraction method for parts with complex shapes and small welding space of 7-series aluminum alloy sheets in the aviation field is provided. In the case of broken needles in friction stir welding in the past, the determination of the precise position of the stirring needle was inaccurate and there was no professional broken needle extraction device to pull out the broken stirring needle. The problem of slag inclusion and excessive wound surface was easily left in the weld bead, which avoided repairing the weld seam Defects lead to scrapped parts
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[0030] combined with Figure 1-9 The present invention is described in further detail:
[0031] The method comprises a magnetic broken needle positioning device, a special conical pneumatic milling cutter 3, an arc-shaped loose hairpin 4 and a friction stir welding broken needle extraction device. Among them, the magnetic broken needle positioning device is composed of a powerful magnet 1 and a wire 2, and the friction stir welding broken needle extraction device is composed of a connecting screw 5, a screw assembly 6, a broken needle extraction bracket 7, a broken needle clamping mechanism 8 and an extractor lifting nut 9 . Broken needle clamping mechanism 8 comprises two handles 21, two pliers heads 22, and two pads 23, and two handles 21 are connected by screws, and are respectively connected with two pliers heads 22, and two pads 23 are respectively positioned at the broken pins. The two sides of the needle clamping mechanism 8 are respectively connected with the two pli...
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The invention belongs to the field of aviation machinery, and particularly relates to a device and a method for extracting friction stir welding broken pins. Stirring pins are broken off and buried inweld seams in friction stir welding procedures, the particular burying locations of the stirring pins are accurately positioned by the aid of magnetic effect principles at first, then grooves which are in uniform transition towards the surfaces of the weld seams step by step are formed in needle breaking locations by the aid of a special conical pneumatic milling cutter and are used with a loosening hairpin to loosen the stirring pins, and the loosened stirring pins can be pulled out from the weld seams under the joint effects of stirring pin extractors and stirring pin extraction frames. Pindigging locations are further thoroughly cleaned by industrial alcohol, and welding repair is carried out. The device and the method have the advantages that the device is easy to operate and high inpracticality, the component welding repair quality can be improved, pin digging procedures can be greatly facilitated, and the production efficiency can be improved; tools such as the customized stirring pin extractors used in integral procedures are low in cost, and accordingly the device and the method are extremely high in economical efficiency.
Description
technical field [0001] The invention belongs to the field of aviation machinery, and in particular relates to a friction stir welding broken needle extraction device and method. Background technique [0002] Friction Stir Welding (FSW for short) is a new solid phase welding technology invented by the British Welding Institute in 1991. It can weld metals that are difficult to weld by traditional fusion welding, especially in aluminum alloy welding, almost all series of aluminum alloys can be welded. With the promotion of friction stir welding technology, this technology has been perfected after more than ten years of development in China, and has been successfully applied to many structural manufacturing fields such as aviation, aerospace, automobile, shipbuilding and high-speed railway. Due to the welding characteristics of 7-series materials, traditional argon arc welding cannot be used, and fusion welding can only weld thicker welds, which is not suitable for thinner part...
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IPC IPC(8): B25B27/00
CPCB25B27/00
Inventor 黄卫梁翠杨建鹏李宝科杨青黄智勇张宏涛
Owner SHAANXI AIRCRAFT CORPORATION