Welding fixture tool of aluminum alloy battery tank body for electric automobile

Abstract

The invention relates to a welding fixture tool of an aluminum alloy battery tank body for an electric automobile, comprising an upper fixture frame and a lower fixture frame, wherein a cross brace, a longitudinal beam and a thread hole A are arranged on the upper fixture frame, and the cross brace, the longitudinal beam and the upper fixture frame form a whole; an installing slot, a thread hole B, a cooling channel, a baffle plate, a cooling water inlet and a cooling water outlet are arranged on the lower fixture frame; the cooling channel formed by three cavities is arranged in the lower fixture frame; the annular cooling channel is divided into two parts by the baffle plate arranged at one side of the lower fixture frame, and both sides of the baffle plate are respectively provided with the cooling water inlet and the cooling water outlet which are respectively connected with a water inlet pipe and a water outlet pipe. The invention has the advantages that cooling water flows in the cooling channel to take away heat generated during welding so that the on-line cooling for a welded member and the fixture tool is realized, the deformations of the upper fixture frame, the lower fixture frame, the border of the welded member and a transverse partition wall are furthest reduced, and the welding precision and the quality of a product are ensured.

Description

technical field [0001] The invention relates to a welding tool, in particular to a welding tool for an aluminum alloy battery box of an electric vehicle with high positioning accuracy, online cooling, and reduced welding deformation. Background technique [0002] As we all know, the aluminum alloy battery box is connected by aluminum alloy profiles through welding, which has high requirements on the shape and flatness of the finished product. Usually, the temperature of the weld seam and its vicinity is very high during welding of aluminum alloys. After cooling, the weld will produce different degrees of shrinkage and internal stress, causing various deformations of the welded components, and because the thermal conductivity of aluminum is three times that of carbon steel, the control of welding deformation of aluminum alloy is more difficult than that of carbon steel structure Much larger, the volume change caused by the transformation of the internal grain structure inside...

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Problems solved by technology

[0002] As we all know, the aluminum alloy battery box is connected by aluminum alloy profiles through welding, which has high requirements on the shape and flatness of the finished product. Usually, the temperature of the weld seam and its vicinity is very high during welding of aluminum alloys. After cooling, the weld will produce different degrees of shrinkage and internal stress, causing various deformations of the welded components, and because the thermal conductivity of aluminum is three times that of carbon steel, the control of welding deformation of aluminum alloy is more difficult than that of carbon steel structure Much larger, the volume change caused by the transformation of the internal grain structure inside the aluminum alloy will also cause welding deformation, and the deformed box after welding will not be able to install batteries, nor can it be assembled on the chassis of the car

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