The basic unit of machining process in Guangdong machining plant is working procedure. The working procedure is composed of installation, working position, working step and tool moving.
(1) working procedure refers to the part of the technological process continuously completed by one or a group of workers for the same or several workpieces at the same time in a working place. Working procedure is the basic unit to set labor quota, equip workers and machine tools, arrange operation plan and carry out quality inspection.
(2) installation is the part of the process completed after the workpiece is clamped once.
(3) when the machine tool (or fixture) of Guangdong Machinery processing plant is used for machining, the workpiece (or tool) must go through several positions relative to the machine tool in one clamping process. The division of labor in each working position is called the working position. Multi position machining can reduce the number of clamping, reduce clamping error and improve productivity.
(4) the working step is the part of the technological process that is completed when the cutting tool and cutting parameters (only the spindle speed and feed) are unchanged.
(5) in one working step, if the metal layer to be cut is very thick, it can be cut several times, and each cutting is called one cutting.
The definition of machining process specification: the process document that specifies the manufacturing process and operation method of products or parts is called process specification, which is the guiding technical document in enterprise production.