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Classification requirements and processing quality of large-scale machining
by：Foxron
2021-11-26
In the process of large-scale machining operations, the design process specifications should be able to process the quality of the machine parts, so that it can meet the technical requirements of the design drawings, and the process should have a higher productivity. Put the product on the market as soon as possible.
Large-scale mechanical processing tries to reduce manufacturing costs, pay attention to reducing the labor intensity of workers, and production safety.
Mechanical parts are composed of several surfaces. To study the relative relationship of the surface of the parts, a datum must be determined. The datum is the point, line, and surface on which the position of other points, lines, and surfaces are determined on the part. According to the different functions of benchmarks, benchmarks can be divided into design benchmarks and process benchmarks.
Classification requirements for large-scale machining
1. Design basis for large-scale machining: the basis used to determine the position of other points, lines and surfaces on the part drawing is called the design basis.
2. Process benchmark: the benchmark used in the processing and assembly of parts, called process benchmark. Process benchmarks are divided into assembly benchmarks, measurement benchmarks and positioning benchmarks according to different uses.
(1) Assembly datum: The datum used to determine the position of the part in the component or product during assembly is called the assembly datum.
(2) Measurement datum: The datum used to test the size and position of the processed surface is called the measurement datum.
(3) Positioning datum: The datum used for positioning the workpiece during processing, called the positioning datum. The surface (or line, point) used as the positioning reference can only be selected from the unprocessed surface of the blank in the process. This positioning surface is called the rough reference. In the subsequent processes, the processed surface can be used as the positioning reference. This kind of positioning surface is called a fine datum.
Large-scale mechanical processing tries to reduce manufacturing costs, pay attention to reducing the labor intensity of workers, and production safety.
Mechanical parts are composed of several surfaces. To study the relative relationship of the surface of the parts, a datum must be determined. The datum is the point, line, and surface on which the position of other points, lines, and surfaces are determined on the part. According to the different functions of benchmarks, benchmarks can be divided into design benchmarks and process benchmarks.
Classification requirements for large-scale machining
1. Design basis for large-scale machining: the basis used to determine the position of other points, lines and surfaces on the part drawing is called the design basis.
2. Process benchmark: the benchmark used in the processing and assembly of parts, called process benchmark. Process benchmarks are divided into assembly benchmarks, measurement benchmarks and positioning benchmarks according to different uses.
(1) Assembly datum: The datum used to determine the position of the part in the component or product during assembly is called the assembly datum.
(2) Measurement datum: The datum used to test the size and position of the processed surface is called the measurement datum.
(3) Positioning datum: The datum used for positioning the workpiece during processing, called the positioning datum. The surface (or line, point) used as the positioning reference can only be selected from the unprocessed surface of the blank in the process. This positioning surface is called the rough reference. In the subsequent processes, the processed surface can be used as the positioning reference. This kind of positioning surface is called a fine datum.
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