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The problem of precision hardware processing parts, shenzhen hongjie hardware spring factory
Shenzhen hon JieWuJin spring factory specializing in the production of springs, metal stamping, precision hardware, electrical appliances spring, CNC lathe processing, lathe hardware and other hardware manufacturers. White stone mansion is located in shenzhen fuyong town industrial park west A4. Contact phone: 0755-27380299
To study the relative relation of the surface of a part, it is necessary to determine a benchmark, which is the point, line, and surface used to determine the position of other points, lines and surfaces. According to the different functions of the benchmark, precision hardware processing parts are composed of several surfaces. The benchmark can be divided into two categories: design benchmark and process reference. The following are detailed explanations.
1. Precision hardware processing design benchmark
A benchmark used to determine the location of other points, lines, and surfaces in part diagrams. Precision metal processing shaft sleeve parts, the outer circle and inner hole design datum is part of axis, the design of the end face is B, C datum, the axis of the bore is the benchmark external circular radial runout.
2. The process
The benchmark used in the process of machining and assembly of precision metal parts is called process benchmark. The process benchmark is divided into assembly benchmark, benchmark and positioning reference.
(1) the benchmark used to determine the position of parts in parts or products when assembling a reference assembly is called the assembly benchmark.
(2) the benchmark used to check the size and position of the processed surface is called a benchmark. As shown in fig.32-2, the inner hole axis is the measuring reference for the radial pulsation of the outer circle. Surface A is the measure of L and L of length L.
(3) the benchmark used for locating the workpiece during the benchmark processing is referred to as the positioning benchmark. As the surface of the locating datum (or line and point), only choice in the first step in the raw surface of the blank, the positioning surface of said crude benchmark. In each process has been machined surface can be adopted as a locating datum, the positioning surface of the said fine benchmark.
1. Precision hardware processing design benchmark
A benchmark used to determine the location of other points, lines, and surfaces in part diagrams. Precision metal processing shaft sleeve parts, the outer circle and inner hole design datum is part of axis, the design of the end face is B, C datum, the axis of the bore is the benchmark external circular radial runout.
2. The process
The benchmark used in the process of machining and assembly of precision metal parts is called process benchmark. The process benchmark is divided into assembly benchmark, benchmark and positioning reference.
(1) the benchmark used to determine the position of parts in parts or products when assembling a reference assembly is called the assembly benchmark.
(2) the benchmark used to check the size and position of the processed surface is called a benchmark. As shown in fig.32-2, the inner hole axis is the measuring reference for the radial pulsation of the outer circle. Surface A is the measure of L and L of length L.
(3) the benchmark used for locating the workpiece during the benchmark processing is referred to as the positioning benchmark. As the surface of the locating datum (or line and point), only choice in the first step in the raw surface of the blank, the positioning surface of said crude benchmark. In each process has been machined surface can be adopted as a locating datum, the positioning surface of the said fine benchmark.
