| 摘要 |
A high tensile steel bumper rail forming method using cold stamping and laser shape correction is provided to correct a shape error due to the spring back generated when processing high tensile steel in the cold stamping method, by applying the laser shape correction. A high tensile steel bumper rail forming method using cold stamping and laser shape correction comprises a step of producing a bumper rail sample and measuring the value of spring back, a step of irradiating laser to the bumper rail sample and measuring the recovery rate against a shape error due to the spring back, a step of detecting the values about the laser irradiation output, feeding speed, irradiation position and direction in the condition that the recovery rate is within a tolerance, and a step of laser-heating a bumper rail produced in the cold stamping method and deformed due to spring back so that the deformation is corrected by the contraction through cooling after heating.
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