Characteristics of precision machining and ultra-precision machining
铜陵源和半导体科技有限公司
2025-02-25
The process flow of precision metal parts refers to a series of processes used in the manufacturing of precision metal parts; these processes include material selection, processing technology, surface treatment, and inspection. Each link requires strict control to ensure product quality and performance.
What is precision machining and ultra-precision machining?
1. General Machining
General machining refers to machining methods with a machining accuracy of around 10μm (IT5~IT7) and a surface roughness of Ra0.2μm~0.8μm, such as turning, milling, planing, grinding, and electrochemical machining; used in automobile manufacturing, tractor manufacturing, mold manufacturing, and machine tool manufacturing.
2. Precision Machining
Precision machining refers to machining with an accuracy of 10μm~0.1μm (IT5 or above IT5) and a surface roughness value of less than Ra0.1μm, such as diamond turning, high-precision grinding, lapping, honing, and cold pressing; used for key parts in the manufacturing of precision machine tools and precision measuring instruments, such as precision lead screws, precision gears, precision guide rails, and miniature precision bearings.
3. Ultra-precision machining generally refers to machining methods with workpiece size tolerances on the order of 0.1μm~0.01μm and a surface roughness Ra on the order of 0.001; such as diamond precision cutting, ultra-precision abrasive machining, electron beam machining, ion beam machining, etc.; used in the manufacturing methods of precision components, large-scale and ultra-large-scale integrated circuits, and metrological standard components.
Characteristics of Precision Machining and Ultra-precision Machining
I. Processing Objects
Precision machining and ultra-precision machining both use precision components and parts as processing objects. The methods, equipment, and objects of precision machining are precisely related; for example, diamond tool cutting machine tools are often used to process some curved surfaces in astronomical and laser instruments.
II. Multidisciplinary Integrated Technology
Precision and ultra-high-precision machining cannot achieve satisfactory results with isolated machining methods alone; the entire manufacturing process system and integrated technology must also be considered; when researching ultra-precision cutting theory and surface formation mechanisms, other related technologies must also be studied.
III. Integrated Machining and Inspection
Online and in-situ inspection of ultra-precision machining is extremely important because the machining accuracy is very high, and the surface roughness parameter value is very low. If the workpiece is removed for inspection after machining and problems are found, it will be difficult to re-process.
IV. Production Automation Technology
Using computer control, error compensation, adaptive control, and process optimization production automation technologies can further improve machining accuracy and surface quality, avoid errors caused by manual operation, and ensure machining quality and stability.
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