要将板状大六面体(如 250×300×60)磨成各交接面互相垂直、各相对面互相平行并且尺寸一致,通常先磨出两个大面,然后靠到角铁上,把两个侧面磨平行。但关键是如何使顶面和底面精确地垂直两侧面。一般均用角尺校正安装,即将角尺放在工作台上,在工件下垫纸或铜皮,使侧面与角尺紧贴 To plate-shaped large hexahedron (such as 250 × 300 × 60) ground into mutually perpendicular to each other, the relative parallel to each other and the same size, usually first grinding out two large surface, and then by angle iron, the two Side grinding parallel. But the point is how to make both the top and bottom sides exactly perpendicular. Generally use square correction installation, the corner is about to put on the workbench, pad paper or copper in the workpiece, so that the side and the corner close