Numerically controlled welding method with automatic compensation and filling of clearance

Abstract

The invention discloses a numerically controlled welding method with automatic compensation and filling of clearance and relates to the technical field of numerically controlled welding. The numerically controlled welding method with automatic compensation and filling of clearance comprises the following steps that according to the groove form of a numerically controlled welded component, the fluctuation range delta W of the groove clearance numerical value is acquired through calculation, and the welding joint upper portion spacing W is determined; with the fluctuation range delta W of the groove clearance numerical value combined, the welding speed v1, the wire feeding speed v2, the swinging frequency f, and the functional relationship between arc length correction u and the welding joint upper portion spacing W are reached; and in the welding programming process, the relationship functional expression between the welding joint upper portion spacing W and each parameter is inserted,the welding joint upper portion spacing W is tracked in real time and fed back to the welding procedure, and automatic adjustment in the welding process is conducted. According to the numerically controlled welding method with automatic compensation and filling of clearance, different from a traditional circumstance that the fluctuation range delta W of the groove clearance numerical value is defined as a fixed value, when the welding joint upper portion spacing W is calculated, the fluctuation range delta W of the groove clearance numerical value is introduced; besides, the functional relationship expression between the welding joint upper portion spacing W and each parameter is inserted in welding programming; no manual operation is needed; and the method is simple, convenient and high in security.

Description

technical field [0001] The invention relates to the technical field of numerical control welding, in particular to a numerical control welding method for gap automatic compensation and filling. Background technique [0002] Numerical control welding technology has been widely used in the manufacturing process of urban rail subways and high-speed EMU car bodies. In the traditional numerical control programming welding process, the fixed welding is usually determined based on the standard groove template and the actual product groove size. parameters, so as to realize the CNC welding of the product. Although CNC welding has improved welding efficiency compared with traditional manual welding and has achieved automation to a certain extent, there are still the following problems: [0003] 1. The welding parameters are fixed values. If the gap changes greatly during the welding process, manual on-site operation is required to adjust the welding parameters, which is difficult to...

AI Technical Summary

Problems solved by technology

[0003] 1. The welding parameters are fixed values. If the gap changes greatly during the welding process, manual on-site operation is required to adjust the welding parameters, which is difficult to adjust in time;

[0004] 2. Large gap fluctuations are likely to cause welding defects such as welding deviation, welding penetration or insufficient filling, which will affect product quality and production efficiency;

[0005] 3. There is a risk of equipment suddenly shutting down during the welding process, and there are potential safety hazards

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