A thing inside, are its classification, classification is just to make people more good choice, in the selection of time, can be for customers and businesses, a better choice, mechanical parts is one of them, then the classification of mechanical parts is what kinds of classification, the following let precision parts processing of the editor to tell you about.
Mechanical parts are composed of a number of surfaces, the study of the relative relationship between the surface of the parts, must determine a benchmark, the benchmark is used to determine the location of other points, lines, surfaces based on the points, lines, surfaces. According to the different functions of the benchmark, the benchmark can be divided into two categories of design benchmarks and process benchmarks.
1 design benchmark
In the parts diagram to determine the location of other points, lines, surfaces of the benchmark, known as the design benchmark. As shown in Figure 32-2 [cc2] sleeve parts, the outer circle and bore design benchmark is the axis of the part, end face A is the end face B, C design benchmark, the axis of the bore is the radial runout of the outer circle benchmark.
2. Process benchmark
Parts in the processing and assembly process used in the benchmark, known as the process benchmark. Process benchmark according to the different uses are divided into assembly benchmark, measurement benchmark and positioning benchmark.