A kind of friction stir welding welding implementation process of roof or underframe
A technology of friction stir welding and underframe, which is applied in welding equipment, manufacturing tools, non-electric welding equipment, etc., can solve the problems of many harmful substances, burn-through, welding tumor, etc., achieve the effect of precise contour and reduce unqualified
Active Publication Date: 2022-03-29
南京雷尔伟新技术股份有限公司
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Problems solved by technology
[0003] However, the roof and chassis generally adopt arc welding manufacturing technology, and the use of arc welding technology to manufacture roofs and chassis has the following disadvantages: (1) The heat input of arc welding technology is large, and the profiles of the roof and chassis are thin, which is easy to produce Welding deformation; (2) arc welding technology produces a lot of harmful substances such as smoke and electric radiation; (4) arc welding technology is prone to problems such as pores, weld bumps, burn-through, and weld seams are not straight; (4) arc welding technology has High labor intensity and low welding efficiency
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[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0027] The implementation process of the friction stir welding welding of the roof or underframe of the present embodiment includes the following steps:
[0028] (1) Clean the groove of the roof profile or underframe profile to be welded, and use mechanical grinding and cleaning with a cleaning agent (such as acetone);
[0029] (2) Place the roof profile or underframe profile on the tooling for assembly, control the gap and misalignment of the group, and clamp the tooling;
[0030] (3) Select the stirring needle specified for roof welding or chassis welding, and weld according to the specified parameters;
[0031] (4) Place the roof profile or underframe profile that has been welded in step (3) on the tooling and keep it in a clamped state for 4 to 5 hours.
[0032] The implementation process of friction stir welding welding on the roof, specifically ...
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Abstract
The invention discloses a process for carrying out friction stir welding of a vehicle roof or an underframe. The process comprises: cleaning the bevel of the roof profile or the underframe profile to be welded, and adopting mechanical grinding and cleaning; placing the roof profile or the underframe profile on the Assemble on the tooling, control the gap, staggered side, and clamp the tooling; select the respective stirring heads for roof welding or underframe welding, and weld according to the parameters; place the welded roof profiles or underframe profiles on the Keep the clamping state on the tooling and keep it for 4 to 5 hours. The process of the invention determines the welding parameters of the friction stir welding of the roof or the underframe, and the appearance and mechanical properties of the welded seam welded with parameters in this range can meet the standard requirements, which provides a strong guarantee for the mass production of the roof and underframe, and reduces the The risk of product failure and scrapping is reduced.
Description
technical field [0001] The invention relates to a butt friction stir welding process and method of aluminum alloy profiles, in particular to an implementation process of friction stir welding welding a car roof and an underframe, and belongs to the technical field of friction stir welding. Background technique [0002] Friction stir welding is a new type of connection technology. It relies on the friction between the stirring head and the workpiece to generate heat, so that the weld area is heated to form a plastic flow state, and the purpose of connection is achieved through the stirring effect of the stirring needle. The welding temperature of friction stir welding is 07~0.9 times of the melting point of aluminum alloy (about 470~560℃), the heat input is much smaller than that of fusion welding, and a small temperature gradient can be formed in the welding joint area, which reduces welding deformation and greatly Reduce the residual stress of the weld. At the same time, t...
Claims
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IPC IPC(8): B23K20/12B23K20/24
CPCB23K20/12B23K20/24
Inventor 纪益根陆鹏杰
Owner 南京雷尔伟新技术股份有限公司