Large mechanical processing in the process of made is mainly made up of several surface, studies the relative relations on the surface of the parts, must determine a benchmark, the benchmark is used to determine other parts of dot, line, the position is based on dot, line, face.
According to the different function of the benchmark, the benchmark can be divided into two categories, design datum and technology datum.
Classification of large mechanical processing design of large mechanical processing benchmark: on the part drawing to determine the location of point, line, face and other benchmark, known as the design basis, its craft benchmark: parts used in the process of machining
and assembly benchmark, known as benchmark process.
Process benchmarking is divided into different according to the use assembly datum, measurement datum and position datum.
Large mechanical processing assembly benchmark: assembly when used to determine the components in the component or product in the location of the benchmark, known as assembly benchmark.
Measurement of large mechanical processing benchmark: to test finished surface size and position of the benchmark, referred to as the measuring datum.
Locating datum of large mechanical processing: process workpiece positioning benchmark used, called the locating datum.
As the surface of the locating datum (
Or line and point)
, only the first step in choosing raw surface of the blank, the positioning surface of said crude benchmark.
In each working procedure has been machined surface can be adopted as a locating datum, the positioning surface of the said fine benchmark.
Precision and ultra precision precision machining of the modern mechanical processing manufacturing technology is an important part of the main is the measure of a country when making use of high-tech manufacturing level one of the important indexes of high and low, with the development of computer and information technology, puts forward higher requirements on manufacturing technology, not only demand the high precision of size, shape, and the requirement to obtain high surface quality.
It is in this market demand, the ultra precision precision machining technology obtained the rapid development of technology, new methods of various kinds are springing up constantly.
The , essentially perfected by cnc aluminum, is one of the first home appliance to be widely distributed.
Applied Materials’ mission is to be the leading supplier of machining parts worldwide-through innovation and enhancement of customer productivity with systems and service solutions.
have three basic components.
Nanjing Precision Engineering Co., ltd has a number of producing line for producing machining parts.