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Automobile frame welding parameter optimization method

A technology of welding parameters and optimization methods, applied in welding equipment, vehicle parts, arc welding equipment, etc., can solve problems such as deterioration of welding effects, achieve the effects of improving welding reliability, reducing welding costs, and reducing adjustment time

Active Publication Date: 2019-12-13
奇瑞新能源汽车股份有限公司
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Problems solved by technology

Since aluminum alloys have relatively high matching requirements for welding parameters, unreasonable selection of any parameter may lead to a sharp deterioration of the welding effect

Method used

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  • Automobile frame welding parameter optimization method
  • Automobile frame welding parameter optimization method
  • Automobile frame welding parameter optimization method

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Embodiment Construction

[0047] The specific implementation manner of the present invention will be described in further detail below by describing the best embodiment with reference to the accompanying drawings.

[0048] figure 1 The flow chart of the method for optimizing the welding parameters of the automobile body under the fixed frequency mode provided by the embodiment of the present invention, the method is used for the welding of the aluminum alloy body, specifically includes the following steps:

[0049] S1, construct the mathematical model of double pulse welding current, the mathematical model is

[0050] In the embodiment of the present invention, the construction of the mathematical model is described in conjunction with the double-pulse welding current waveform. The design of the double-pulse model is general, and its mathematical modeling is as follows figure 2 As shown, p represents the unit pulse time, T is the pulse group period, t 1 Indicates the base value time of a strong bu...

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Abstract

The invention relates to the technical field of software upgrading, and provides an automobile frame welding parameter optimization method. The method comprises the following steps: (1) constructing amathematical model of double-pulse welding current, wherein the mathematical model is represented by the formula; and (2) determining an optimal variable of the continuous adjustment of the welding current in a fixed-frequency mode, wherein the optimal variable is the number n1 of pulses in a strong pulse group and the number n2 of pulses in a weak pulse group. With the automobile frame welding parameter optimization method, the welding reliability of a new energy automobile is improved, and welding parameters are optimized according to the welding mathematical model of the new energy automobile and a related data fitting algorithm, so that the quality of a welding seam is guaranteed, and splashing and undercut phenomena are greatly reduced. In the welding process of a welding machine with the self-learning function, regular and stable current and stable arc length stretching rhythm are ensured, and no arc breaking phenomenon occurs, so that the welding cost of the new energy automobile is reduced.

Description

technical field [0001] The invention relates to the technical field of automobile welding and provides a method for optimizing welding parameters of automobile frame. Background technique [0002] The automobile manufacturing process is complex. Although the traditional processing methods are relatively mature, the complex structure of the car body has many parts, the manufacturing process is long, the process equipment is complicated, and the production energy consumption is high, which is a common problem in the industry. For example, a body-in-white usually consists of about 400 stamping parts; in addition, automobile manufacturing needs to be completed through four processes: part forming, body frame welding, body spraying, vehicle assembly inspection and road test procedures; firstly, the body parts are formed , such as the left outer panel requires a heavy-duty single-action high-speed mechanical press (2400t-800t) and a mold weight of 300t-320t (the mold is about 13.5...

Claims

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Application Information

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IPC IPC(8): B23K9/173B23K9/09B23K9/133
CPCB23K9/09B23K9/133B23K9/1735B23K2101/006
Inventor 茅卫东金一王成文周俊锋刘淑梅陈怀安孙亚王鹏
Owner 奇瑞新能源汽车股份有限公司
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