Precision metal parts can be used to process various re […]
Precision metal parts can be used to process various reverse forming surfaces, such as: inner and outer cylindrical surfaces, outer and inner conical surfaces, outer and inner threads, end faces, grooves, knurls, etc.
It is the most widely used machine tool in metal parts, with the longest production history and the most varieties. There are many types of lathes. According to their uses, the structure can be divided into surface lathes, horizontal lathes, single-axis automatic lathes, multi-axis automatic and semi-automatic lathes, turret lathes, vertical lathes, multi-tool semi-automatic lathes, Specialized lathes, etc. General machine tools are the most common machine tools used for turning workpieces.
General principles of precision metal parts processing:
1. Benchmark first
That is, the datum surface is processed first. During the machining process of the part, the surface as the positioning reference should be processed first, so as to provide a precise reference for the processing of the subsequent process as soon as possible.
2. Divide the processing stage
Surfaces with high machining quality requirements are divided into processing stages, which can generally be divided into three stages: rough machining, semi-finishing, and finishing. It is mainly to ensure the processing quality; it is beneficial to scientific application equipment; it is convenient to arrange the heat treatment process, and it is convenient to find blank defects.
3. Face first and then hole
For parts such as boxes, brackets, and connecting rods, the plane should be machined first and then the holes should be machined. In this way, the processing hole can be positioned on the plane, the positional accuracy of the plane and the hole can be ensured, and the processing of the hole on the plane can be facilitated.
The finishing of the main surface, such as grinding, honing, fine grinding, rolling, etc., should be placed at the end of the process route. The general principles for formulating the processing route of precision parts and the formulation of the processing rules for precision metal parts can be roughly divided into two parts. The first is to formulate the process route of parts processing, and then determine the process size of each process, the equipment and process equipment used, as well as cutting specifications, working hour quotas, etc.