Machining error is the degree of deviation between the actual geometric parameters (geometric dimensions, geometric shape and mutual position) and the ideal geometric parameters of a machined part.

-75-Table 9: Pickling of stainless steel pipes; pickling and passivation of welded seams in Tongqiang and other stainless steel pipes. Table 3: Passivation of stainless steel: Alloy composition (volume fraction), treatment temperature (°C), duration (minutes). 00, 300 and 400 series; precipitation-hardening heat-treated alloys.

Tool selection and cutting dosage determination is an important part of the CNC machining process, which not only affects the machining efficiency of the CNC machine, but also directly affects the quality of machining.Development of CAD/CAM technology

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The basic principle of gear meshing: the teeth of two gears mesh with each other to transmit motion and power, and their instantaneous ratio should theoretically be constant (involute gears). However, accuracy errors can destroy this ideal state.

Sheet metal manufacturing is optimised and upgraded with the help of modern processing equipment during the actual processing of sheet metal, which can improve the accuracy of the parts to a greater extent and enable the processing of more complex shapes of parts. Unloading: The main unloading equipments for sheet metal are CNC equipments.

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The application of CNC technology has made a qualitative change in the traditional manufacturing industry, especially in recent years. The development of microelectronics technology and computer technology has brought new vigour to CNC technology. CNC technology and CNC equipment is an important foundation for the industrial modernisation of each country.

[Abstract] The machining process includes roughing and finishing, and its influence on the machining accuracy of the parts is mainly manifested as the intrinsic influence, the influence of force and the influence of thermal change. In order to make the machining accuracy to meet the prescribed standards, for these influencing factors, in the processing of parts

Practical Sheet Metal Operation Techniques 1.5 Processing Properties of Metal Materials 1.5 Processing Properties of Metal Materials In addition to the shape of the processed parts, accuracy and structural equipment available to the enterprise, the determination of the processing technology programme for sheet metal parts also has a great deal to do with the materials used for the parts.