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Precautions for surface quality control of CNC machining parts
Date: 2022-09-23
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Precautions for surface quality control of CNC machining parts

(1) cnc processing prepares a reasonable process flow.

In addition to pursuing the initial conditions of incoming materials, the appearance of mechanical structural parts also needs to optimize and sort out feasible machine operating standards and corresponding professional processing bodies and system processes. In the process of formulating the process, we must ensure some simple and basic functions. Once determined, positioning datums should be used, and the number should be consistent with the datums used in the design drawings. If the two benchmarks are inconsistent, try to choose a benchmark of reliable quality. Have more than two precisely positioned design reference points.

(2) Reasonable cutting parameter setting for cnc machining is the key to obtaining surface quality.

The meaning of cutting parameters refers to the use of machinery in the CNC machining process. Various machining data, such as tool angle, cutting speed, depth of cut, feed rate, etc. At the same time, in the process of CNC machining of parts, the material, size and shape of the parts should be selected reasonably.

In plastic CNC machining, if a tool with a larger rake angle is selected, the effect of suppressing the accumulation of chips can be achieved. The increase of the rake angle of the tool can reduce the cutting force of the tool and the deformation of the tool. It shortens the tool-to-tool contact length and prevents the formation of chip bulges.

(3) CNC machining of ultra-precision cutting and grinding of low-roughness workpieces.

What is ultra-precision cutting? As a scientific CNC machining method, it uses rare high technology to interfere with some values of the external friction coefficient of the parts. Meet the difficult micro-cutting process. The difficulty is that it cannot be seen with the naked eye within the 0.1 micron error requirement of cutting processing, and the technical level of processing equipment is not high.

In the process of ultra-precision CNC machining of workpieces, high-speed cutting must be maintained at all times, and the amount of feed should be as small as possible. This results in a smoother workpiece surface and less residue on the workpiece surface.

(4) Ultra-precision CNC machining, honing, grinding and other methods are used as subsequent processes.

In order to reduce the roughness of the workpiece surface, the precision is controlled in the lowest area. We generally use relatively fine and compact machining, grinding and grinding methods. Basic processing must be done to complete. For the last process of CNC machining, this can not only reduce the surface roughness of the workpiece, but also reduce the surface roughness of the workpiece. The availability of the workpiece will be improved.

Reduce the heat generated during processing, but the only point is performance, avoid parts overheating and surface damage damage. Otherwise, we should use this technology to reduce the roughness of the workpiece surface, which can gradually reduce the cost and realize multiple machines.

Environment: The operation is controlled by the main shaft, and it runs in the axial and bending directions, so when grinding, the direction of the hole is certain. Before starting machining and grinding, the hole position must be confirmed. When grinding a workpiece, the grinding head is fast, but the feed rate is not high.

When removing rough metal, the grinding head cannot change its position at will. In addition, compared with grinding, honing is a fully automatic process, which reduces the consumption of human resources in the process of workpiece processing and greatly reduces the consumption of human resources.

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