Precision grinding refers to the selection of a fine-grained grinding wheel on a precision grinding machine, and the fine grinding of the grinding wheel to make the abrasive grain have micro-blade and contour; after grinding, the grinding of the surface to be ground The traces are extremely fine and the residual height is extremely small. Together with the non-sparking grinding stage, a surface grinding method with a processing accuracy of 1 to 0.1 μm and a surface roughness Ra of 0.2 to 0.025 μm is obtained.
Ultra-precision grinding refers to the processing accuracy of less than 0.1μm and the surface roughness of less than 0.025 μm. It is a sub-micron processing method and is developing in the nanometer scale. It is suitable for steel materials, ceramics, glass, etc. Make the processing of the material. Grinding processing has identified Titanium. In recent years, ultra-precision grinding has developed rapidly, and some grinding processes related to ultra-precision grinding, such as mirror grinding, fine grinding and high-speed grinding, have appeared.
1. Features of precision and ultra-precision grinding
(1) Precision and ultra-precision grinding is a system engineering
Precision and ultra-precision grinding is not a mere processing method. It has formed a systematic engineering with components such as processed materials, precision and ultra-precision grinding mechanisms, precision and ultra-precision grinding machines, grinding wheels and their dressing. Positioning and clamping of the workpiece, detection and error compensation, working environment and human skill. Precision and ultra-precision grinding machines are the key to ensuring machining accuracy.
(2) Superabrasive grinding wheel is the main tool for precision and ultra-precision grinding
Superhard grinding is a very thin layer of cutting, the grinding depth is very small, the abrasive material requires high high temperature strength and high temperature pressure, so the diamond and cubic boron nitride super hard abrasive are used; due to the surface roughness value The requirements are very low, so the super-abrasive micro-grinding wheel is often used for grinding.
(3) Precision and ultra-precision grinding is an ultra-micro cutting process
Precision and ultra-precision grinding is an extremely thin cut that is ground inside the crystal and has a small machining allowance that is likely to be comparable to the amount of precision required for the workpiece.
2. Application of precision and ultra-precision grinding
(1) Grinding of metal materials such as steel and its alloys, especially hardened steel treated by quenching.
(2) It can be used to grind non-metallic hard and brittle materials such as ceramics, glass, quartz, semiconductor materials, stone, and the like.
(3) At present, there are mainly super-precision grinding machines such as cylindrical grinding machines, surface grinding machines, internal grinding machines, coordinate grinding machines, etc., which are used for super-fine grinding of outer circles, planes, holes and holes.
(4) Precision and ultra-precision grinding and its free abrasive processing are complementary.
Shantui Undercarriage Parts,Shantui Parts,Shantui Forklift,OEM Shantui Undercarriage Parts
JINING SHANTE SONGZHENG CONSTRUCTION MACHINERY CO.LTD , https://www.sdkomatsudozerparts.com