Precision machining for high efficiency and precision and plastic deformation

The operation steps of precision machining

1. Finishing processing: This processing principle is roughly some grinding and polishing processing, which is usually a step after the completion of the product structure.

2, the first surface after the hole: in the precision mechanical parts, for the workpiece such as the bracket, it is necessary to carry out plane processing and mechanical hole processing, in order to process the accuracy error of the hole is smaller, the first processing of the plane after the processing of the hole is conducive to reducing the error.

3. Division of processing stage: When the product is in the precision machinery parts, according to different product requirements to carry out different degrees of processing, processing degree needs to be divided, if the precision requirements are not high, then a simple roughing stage is on the line. The progress requirements of the product are becoming more and more stringent, and the subsequent semi-finishing and finishing stages will be carried out.

4. Benchmark first: When using mechanical equipment to process the product, it is necessary to determine a datum surface, so that there can be a positioning reference in the subsequent processing, after determining the datum surface, it is necessary to first process the datum surface. In precision mechanical parts, there will be many workpieces that are not produced through one-time production, but when the workpiece is produced, it is only a rough model.

Precision machining in the tool, in the process of operation is mainly the use of its diamond sand wheel, to a certain extent, effectively control the amount of back cutting and feed, in the ultra-precision grinding machine, in operation can be carried out

Ductile grinding, that is, nano-grinding. Optical mirrors can be obtained even on the surface of glass.

From the long-term development point of view, the manufacturing technology of its equipment is the main strategy and direction of the current development of the national economy in the world, is one of the important means of national economic development, but also a country independent, prosperous, sustainable and stable economic development, science and technology to maintain the lead in the long-term plan. The development of science and technology has also put forward higher requirements for precision machining and ultra-precision machining technology.

High efficiency and high precision machining of mechanical parts and ultra-precision machining can obtain extremely high surface quality and surface integrity to a certain extent, but processing efficiency can be sacrificed to ensure. In addition to high strength, the mold needs to have sufficient impact toughness and wear resistance.

The metal blank processed by precision machinery has a strong plastic deformation in the mold, which will make the mold temperature rise to about 250 ° C ~ 300 ° C, and therefore, the mold material needs a certain degree of tempering stability. Because of the above, the life of the cold extrusion die is much lower than that of the stamping die.

Precision machining in the pursuit of high reliability of products to a certain extent, in the operation of bearings and other parts that bear the load one time while doing relative motion, in the operation can effectively reduce its surface roughness, so that you can improve the wear resistance of parts, improve its work stability, extend the service life. The surface roughness of the ceramic ball is required to reach several nanometers. The chemical properties of the processing metamorphic layer are active and susceptible to corrosion, so from the point of view of improving the corrosion resistance of parts, the metamorphic layer generated by processing is required to be as small as possible.