试验因素对波纹度影响的分析

汽车板冲压成形表面波纹度对零件涂装后的鲜映性有着重要的影响,而鲜映性直接反映汽车外观质量.为明确波纹度影响因素,测量准确可靠的试验数据,基于gom在线应变测量系统,通过BUP1000板材综合成形试验机对典型汽车外板进行马克杯冲压,分析了冲压后不同变形量、试样表面检测方向及试样冲压速度等因素对试样表面波纹度的影响.研究结...

Analyzing the influence of experimental factors on waviness

The surface waviness of stamping and forming of automobile plates has an important influence on the vividness of parts after painting, and the vividness directly reflects the appearance quality of automobiles. In order to clarify the influencing factors of waviness, and to measure accurate and reliable test data, the BUP1000 sheet comprehensive forming test machine was used for mug stamping of the typical automobile outer panel. The influences of factors, including the deformation amount, sample surface detection direction and sample stamping speed, on the surface waviness of the sample were analyzed based on gom online strain measurement system. The results showed that the waviness results almost linearly increased with the increase of deformation amount of the specimen surface after stamping. There was no obvious law in the change of surface waviness when the stamping speed was 0.5~3 mm/s, indicating that the stamping speed had little influence on the surface waviness. The test results of rolling direction and transverse direction showed that the longitudinal waviness was slightly lower than the transverse waviness.