1, CNC lathe processors must read the contents of the process card before processing, clearly know the parts, shapes and sizes of the workpiece to be processed, and know the processing contents of the next process.

2. Before the workpiece is clamped, measure whether the blank size meets the requirements of the drawing, and carefully check whether the workpiece is placed according to the programming work instruction when clamping.

3, after the completion of rough machining should be timely self-checking, so that the data with errors can be adjusted in time. The content of self-inspection is mainly the position and size of the machining part.

(1) Whether the workpiece is loose;

(2) Whether the workpiece is correctly divided;

(3) 3) Whether the dimension from the machining part of CNC hardware parts to the reference edge (reference point) meets the requirements of the drawings;

(4) The position and size of NC machining parts. After checking the position size, measure the rough ruler (except arc).

4, after a rough self-check before finishing. After finishing, workers should check the shape and size of the machined parts: check the basic length, width and size of the machined parts on the vertical plane; Measure the base point size of the bevel machined part marked on the drawing.

5. Workers can take out the workpiece after completing the self-inspection of the workpiece and confirming that it meets the requirements of drawings and process, and send it to the inspector for special inspection.