Blank, scribing device and scribing method

The invention discloses a blank, a lineation device and a lineation method, and belongs to the technical field of bench workers, and the lineation device comprises a base serving as a blank placement reference, and a first supporting piece, a second supporting piece, a third supporting piece and a pressing mechanism which are distributed on the base in a triangular shape; the top face of the first supporting piece is a first supporting inclined face with the inclination angle theta relative to the horizontal plane, and at least part of the area of the first supporting inclined face is used for supporting a blank. The height of the second supporting piece and the height of the third supporting piece are adjustable, and the second supporting piece and the third supporting piece are used for supporting the blank through the top points of the tops. And the pressing mechanism is used for pressing the blank. According to the scribing device, the tedious processes of frequent metering and leveling of a blank referen