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Precision Machining To Solve The Problem
Jun 13, 2017

  Precision machining to solve the problem, one processing accuracy, including shape and position tolerance, dimensional accuracy and surface conditions; Second, processing efficiency, some processing can achieve better processing accuracy, but difficult to achieve high processing efficiency. Precision machining, including micro-processing and ultra-fine processing, finishing and other processing technology. The traditional precision machining methods are belt grinding, precision cutting, honing, precision grinding and polishing.

  (1) abrasive belt grinding is a sticky abrasive blended fabric for the workpiece processing, belonging to the scope of grinding with abrasive grinding, high productivity, good surface quality, the use of a wide range of features.

  (2) precision cutting, also known as diamond cutting tool (SPDT), with high-precision machine tools and single crystal diamond cutting tools, mainly for copper, aluminum and other non-grinding processing of soft metal precision machining, such as computer Of the drum, magnetic disk and high-power laser with a metal mirror, etc., than the general cutting precision to 1 to 2 levels.

  (3) honing, with the stone sand bar composed of honing head, under a certain pressure along the surface of the workpiece reciprocating motion, after processing the surface roughness up to Ra0.4 ~ 0.1μm, preferably to Ra0.025μm, mainly used Processing cast iron and steel, should not be used to process the hardness of small, good toughness of non-ferrous metals.

  (4) precision grinding and polishing through the workpiece and the tool between the abrasive and processing fluid, the workpiece and the research tool for mutual mechanical friction, so that the required workpiece size and accuracy of the processing methods. Precision grinding and polishing for metal and non-metallic parts can achieve other processing methods can not achieve the accuracy and surface roughness, the surface roughness Ra ≤ 0.025μm processing metamorphic layer is small, high surface quality, precision grinding equipment Simple, mainly used for flat, cylindrical, gear tooth surface and sealing requirements of the processing of spouses, can also be used for gauges, measuring blocks, injectors, valve body and spool of the finishing process.

  (5) polishing is the use of mechanical, chemical, electrochemical method of the workpiece surface of a micro-processing, mainly used to reduce the workpiece surface roughness, commonly used methods are: manual or mechanical polishing, ultrasonic polishing, chemical polishing, electricity Chemical polishing and electrochemical mechanical processing. Manual or mechanical polishing after the workpiece surface roughness Ra ≤ 0.05μm, can be used for flat, cylindrical, curved and mold cavity polishing processing. Ultrasonic polishing processing accuracy of 0.01 ~ 0.02μm, surface roughness Ra0.1μm. The surface roughness of the chemical polishing process is generally Ra ≤ 0.2 μm. Electrochemical polishing can be raised to Ra0.1 ~ 0.08μm.