The production process refers to the entire process of making a product from raw materials (or semi-finished products). For the production of machinery, including the transportation and preservation of raw materials, the preparation of production, the manufacture of blanks, the processing and heat treatment of parts, the assembly and commissioning of products, paints and packaging. The content of the production process is very extensive. Modern enterprises use the principles and methods of systems engineering to organize production and guide production, and regard the production process as a production system with input and output. It can make the management of the enterprise scientific and make the enterprise more resilient and competitive.
In the production process, the process of directly changing the shape, size and performance of the raw material (or blank) into a finished product is called a process. It is a major part of the production process. For example, casting, forging and welding of blanks; heat treatment for changing material properties [1]; machining of parts, etc., are all processes. The process is in turn composed of one or several sequential processes.
The process is the basic building block of the process. The so-called process refers to the part of the process that is continuously completed for one or a group of workpieces at a work place. The main feature of a process is that it does not change the object, equipment and operator, and the content of the process is continuously completed. For example, the part of [cc1] in Figure 32-1 can be divided into the following two processes:
Step 1: On the lathe, the outer circle of the car, the end face of the car, the bore and the inner hole chamfer;
Step 2: Drill 6 small holes in the drill press.
In the same process, the workpiece may have to be installed several times. The part of the process that the workpiece performs in one setup is called installation. In the process 1, there are two installations. First installation: Clamp the outer circle with a three-jaw chuck, the end face of the car C, the inner hole of the hole, the inner hole chamfering, the outer circle of the car. The second installation: the head is clamped to the outer circle with a three-claw disk, the end faces of the car are A and B, and the inner hole is chamfered.
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