Preparation method of preformed sample for evaluating waviness of floating-coat-free automobile panel

The invention discloses a preparation method of a preformed sample for evaluating the waviness of a floating-coat-free automobile panel. The preparation method comprises the following steps of 1) smearing vaseline on the surface of a steel plate to be subjected to sample cutting; (2) stacking a plurality of steel plates coated with vaseline together; (3) carrying out electric spark cutting on the stacked steel plates; 4) cleaning the surface of a cut preformed waviness sample with absolute ethyl alcohol. According to the preparation method of the preformed sample for evaluating the waviness of the floating-coat-free automobile panel, the plurality of steel plates are stacked through vaseline, and compared with a plate shearing machine and the direct electric spark cutting, the accurate size and the good surface can be obtained. 本发明公开了一种评价免中涂汽车面板波纹度的预成型试样制样方法，包括以下步骤：1)在即将切割试样的钢板表面涂抹凡士林；2)将多块涂抹了凡士林的钢板叠在一起；3)对叠在一起的多块钢板一起进行电火花切割；4)将切割完成的预成型波纹度试样表面用无水乙醇进行清洗；本发明设计的评价免中涂汽车面板波纹度的预成型试样制样方法通过凡士林将多个钢板叠加，与剪板机和直接电火花切割相比，能