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2025

Deformed After Sheet Metal Processing? 3 Stress Relief Solutions After Laser Cutting

Sheet Metal stress relief,laser cutting deformation control,sheet metal leveling,low temperature tempering for sheet metal,laser cutting process optimization,sheet metal precision machining.

During laser cutting of sheet metal, unrelieved thermal stress caused by local high temperatures is the main reason for post-processing deformation and warping, directly affecting product precision and subsequent assembly. "Sheet metal stress relief" and "laser cutting deformation control" have become popular Google topics. Mastering the following 3 targeted solutions can efficiently resolve stress issues and reduce rework rates.

1. Mechanical Leveling for Stress Relief: Efficient for Mass Production

Using the alternating bending effect of multiple rolls of a leveling machine, the internal stress of the sheet metal is redistributed through the "Bauschinger effect", eliminating deformation hazards at the source. Suitable for common sheet metal materials such as cold-rolled steel and stainless steel, especially for mass processing scenarios. During operation, preset rolling parameters according to sheet thickness and material; after multiple alternating bends, the flatness of the sheet metal can reach ±0.1mm/m, while residual stress is completely released, and the processing efficiency is more than 5 times higher than manual correction.

2. Low-Temperature Tempering Heat Treatment: Precisely Eliminate Thermal Stress

For thermal stress generated by laser cutting, adopt low-temperature tempering process: heat the sheet metal to 200-300℃, keep it warm for 1-2 hours, then cool slowly. This solution can avoid changes in material properties, while allowing the lattice structure to fully relax and precisely release thermal stress. Especially suitable for high-precision sheet metal parts (such as equipment enclosures, precision brackets), the deformation rebound rate after treatment is less than 3%, which can meet strict dimensional tolerance requirements.

3. Process Optimization to Control Stress in Advance: Reduce Stress Generation from the Source

Avoid stress concentration in advance by optimizing the cutting process and reduce subsequent processing costs: first, plan the "inside-out, symmetric cutting" path to disperse the heat-affected zone and avoid local overheating; second, adjust laser power and cutting speed to match material parameters to reduce heat input; third, turn on high-pressure inert gas cooling during cutting to accelerate heat dissipation and blow off slag synchronously to reduce stress residue. This solution requires no additional equipment investment and is suitable for small and medium batch production.

Key words:

sheet metal stress rellief,laser cutting deformation control,sheet metal leveling,low temperature tempering for sheet metal,laser cutting process optimization ,sheet metal precision machining

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