The CNC machined part is used to determine the position of other point line faces. The points, lines, and faces on which they are based are called datums. So how is the benchmark for CNC machining parts determined?
The following figure is a reference example for the reference determination of CNC machining parts shared by CNC Lathe Machine China Factory:
1. CNC machining design basis
The reference used to determine other points, lines, and plane positions on a CNC machined part drawing is called the design basis. CNC machining CNC is also called computer 锣, CNCCH or CNC machine tool. It is actually a kind of name in Hong Kong, which greatly reduces the number of tooling. CNC processing and processing complex parts do not require complicated tooling. CNC machining is a new processing technology, mainly working. It is a processing program that converts the original manual to computer programming. If you want to change the shape and size of the part, you only need to modify the part processing program, which is suitable for new product development and modification.
2. CNC machining parts process benchmark
The benchmark used in machining, inspection, and assembly of CNC machined parts is the process benchmark. CNC processing General CNC machining usually refers to computer digital control precision machining, CNC machining lathes, CNC machining milling machines, CNC machining boring and milling machines. The finished feed routes are basically in the order of their part contours. Therefore, the focus of the determination of the feed route is to determine the feed path for roughing and idle travel. CNC machining is commanded by the control system to make the tool meet the requirements of various movements, in the form of numbers and letters to indicate the shape and size of the work piece and other technical requirements and processing requirements. It refers to the process of machining parts on CNC machines. In order to improve the automation of production, shorten the programming time and reduce the cost of CNC machining, a series of advanced CNC machining technologies have been developed and used in the aerospace industry. Process benchmarks are divided into positioning benchmarks, measurement benchmarks, and assembly benchmarks.
(1) Positioning reference
The reference used to determine the correct position of the workpiece relative to the machine tool during machining is called the positioning reference.
(2) Measurement basis
The reference on which the surface size and position are processed is called the measurement reference.
(3) Assembling the benchmark
The basis used to determine the position of a part or part in a machine when assembling. For example, the journal of a shaft component, the bottom surface of a gear housing (BOX), etc., are often assembled.
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