SCIENCE AND TECHNOLOGY ENGLIAH FOR MECHANICAL ENGINEERING All part information must be understood thoroughly by the planner. It should be regarded as the starting point of process planning. Incomplete, incorrect or indefinite part information will result in bad technological decisions and ineffective process plans Drawing of the blankpiece a blank is designed according to the part drawing, taking into consideration the mechanical property requirements and cost of the part. It is necessary to know how the blank to be manufactured. the shape, size and accuracy of the blank. These factors determine the allowances of all part surfaces, which are to be removed, and the locating and clamping methods of the workpiece in the initial stage of a machining processSCIENCE AND TECHNOLOGY ENGLISH FOR MECHANICAL ENGINEERING All part information must be understood thoroughly by the planner. It should be regarded as the starting point of process planning. Incomplete, incorrect or indefinite part information will result in bad technological decisions and ineffective process plans. A blank is designed according to the part drawing, taking into consideration the mechanical property requirements and cost of the part. It is necessary to know how the blank to be manufactured, the shape, size and accuracy of the blank. These factors determine the allowances of all part surfaces, which are to be removed, and the locating and clamping methods of the workpiece in the initial stage of a machining process. Drawing of the Blankpiece