What is the precision mechanical parts processing classification and what are there there?

What is the precision mechanical parts processing classification and what are there there?

Machined parts are the mechanical parts formed by a variety of mechanical processing equipment, mainly refers to the chemical reaction (or reaction is very small) processing.

Mechanical machining mainly has manual machining and CNC machining two categories.

Manual processing refers to the mechanical workers through the manual operation of the milling machine, lathe, drilling machine and saw machine and other mechanical equipment to achieve the processing of various materials.

Manual machining is suitable for small batch, simple parts production.

Numerical control machining (CNC) refers to the mechanical workers using numerical control equipment to processing, these numerical control equipment including machining center, car milling center, electric spark line cutting equipment, thread cutting machine, etc.

CNC machining in a continuous way to process workpieces, suitable for large quantities, complex shape of parts.

Precision mechanical parts and processing

Technical requirements for machining 1. Tolerance requirements (1) The unlisted shape tolerance shall comply with the requirements of GB1184-80.

(2) The allowable deviation of the annotated length size is ± 0.5mm.

(3) The casting tolerance belt is symmetrical to the basic size configuration of the blank casting.

2, cutting and processing parts requirements (1) Parts should be checked and accepted according to the process, and can be transferred to the next process only after the previous process is qualified.

(2) Burr is not allowed for the processed parts.

(3) The finishing parts shall not be placed on the ground when placed, and necessary support and protection measures shall be taken.

Processing surface is not allowed to rust and affect the performance, life or appearance of bumps, scratches and other defects.

(4) The rolling and finishing surface shall not be peeled after rolling.

(5) the surface of the final process after heat treatment should not have oxidation skin.

The finishing mating surface, tooth surface should not be annealing (6) The processed thread surface is not allowed to have black skin, bump, buckle and burr defects.