What is CNC precision machining

The control system of CNC precision machining can generally control the machine tool according to the numerical sequence command to realize the automatic start and stop, reversing and speed change of the spindle, and can automatically control the feed speed, direction and processing route, and perform processing. The tool size adjusts the cutting amount and the walking track, which can complete various auxiliary actions required in processing.

The structure of CNC precision machining CNC lathe is also composed of spindle box, tool rest, feed transmission system, bed, hydraulic system, cooling system, lubrication system and other parts, but the feed system of CNC lathe There are essential differences in the structure of the feed system of the horizontal lathe. The mechanical structure of a typical CNC lathe is shown in the diagram.

Stainless steel materials used in the processing of precision mechanical parts:

1. Requirements for material hardness, for some places, the higher the hardness of the material, the better, but only limited to processing The hardness of the machine parts requires that the material to be processed should not be too hard. If it is harder than the machine parts, it cannot be machined.

2. Secondly, the material should be moderately soft and hard, at least one grade lower than the hardness of the machine parts. At the same time, it also depends on the function of the machined parts and the reasonable selection of materials for the parts.

In short, CNC precision machining still has some requirements for materials, not all materials are suitable for processing, such as too soft or too hard materials, the former is not necessary for processing, and the other is Cannot be processed.

So, in general, for mechanical processing, the material should be lower than the hardness of the machine tool, so that it can be processed. Not all materials can be precision machined. Some materials have too much hardness, which exceeds the hardness of the machined parts, which may break the parts. Therefore, these materials are not suitable for CNC precision machining unless they are made of special materials. finished parts, or laser cutting.

CNC precision machining is a process of changing the dimensions or properties of a workpiece with a machining machine. The definition of general precision machining refers to the completion of the processing of the main surfaces in steps and procedures, including workpiece parallelism, surface finish, surface perpendicularity, surface hardness, etc., which can make the machining accuracy of the parts and the machining surface quality reach requirements specified in the drawings.

Parallelism requirement: It is the requirement of the small staff around the workpiece, such as a rectangular workpiece, then the thickness of the four corners of the workpiece should reach a certain small staff range. To the requirements of the minor officials, the requirements of parallelism cannot be met.

Perpendicularity requirements: It is to require the side and ground of the workpiece to meet the requirements of the minor officials, which can be understood as a proper body. From the perspective of the number axis, it is divided into three sides of XYZ. Generally, XZ and YZ are required to meet the requirements of the minor officials. The error is also roughly the same as the parallelism requirement. Generally, it can be punished according to the parallelism requirement.

At the same time, the processing of our precision mechanical parts is divided into cold processing and hot processing according to the temperature conditions it is in. Generally, it is processed at room temperature and does not cause chemical or phase changes of the workpiece, which is called cold working. Generally, processing above or below normal temperature will cause chemical or phase changes in the workpiece, which is called thermal processing. Cold working can be divided into cutting and pressure working according to the difference in processing methods. Thermal processing is common in heat treatment, forging, casting and welding.

Nowadays, it is very common for us to utilise in custom metal works. And the quality of is decisive to production efficiency.
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