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Precautions For Control Surface Quality Of Machined Parts

April 8, 2022

(1) Prepares a reasonable process flow.


In addition to pursuing the initial conditions of incoming materials for the appearance of mechanical structural parts, it is also necessary to optimize and sort out a feasible machine operation standard and corresponding professional processing body, system process. In the process of formulating the machining process, we must ensure some simple and basic functions. Once determined, positioning datums should be used and The quantities are consistent with the datum used in the design drawings. If the two benchmarks are inconsistent, try to choose a high-quality and reliable benchmark. have more than two the design reference points of the accurate positioning.


(2) Reasonable cutting parameter setting is the key to obtain surface quality.


The meaning of cutting parameters refers to the use of machinery in the machining process. Various machining data, such as tool angle, cutting speed, cutting depth, feed rate, etc. At the same time, in the process of machining parts, we should reasonably choose material, size and shape of the parts. In plastic processing, if you choose a knife with a larger rake angle tool, the effect of suppressing the accumulation of chips can be achieved. The increase of the tool rake angle can reduce the cutting force of the tool and the deformation of the cutting tool. It shortens the cutting tool contact length with the cutting tool and prevents the formation of chip bulges.


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(3) Grinding of ultra-precision cutting and low-roughness workpieces.


What is ultra-precision cutting? As a scientific processing method, it uses rare high-tech to interfere with some values ​​of the external friction coefficient of the parts. To meet difficult micro-cutting process. The difficulty is that it can't be seen by the naked eye seen within the 0.1 micron error requirement for cutting and processing, the technological level of processing equipment is not far-reaching. In the process of machining workpieces with ultra-precision machining, it is necessary to high-speed cutting must be maintained at all times, and the tool feed should be as small as possible. In this way, the workpiece surface can be smoother and residues on the workpiece surface can be reduced.


(4) Adopts ultra-precision machining, honing, grinding and other methods as the latter process.


In order to reduce the roughness of the workpiece surface the degree of precision is controlled within the lowest area. We generally use relatively fine and close processing, grinding and grinding methods. Must be to completed after basic processing. For the last step of processing, this can't only reduce the roughness of the workpiece surface, but also reduce the surface roughness of the workpiece. Will improve the usability of the workpiece. Reduce the heat generated during processing, but the only point is performance, avoid overheating of parts and surface damage hurt. Otherwise, we should use this technology to reduce the roughness of the surface of the workpiece, which can gradually reduce the cost and realize many machine tools.


Environment: The operation is controlled by the main shaft, and it operates in the axial and curved directions, so during grinding, the orientation of the hole is a certain amount. At the beginning of the machining grinding process before, the hole location must be confirmed. When the workpiece is ground, the speed of the grinding head is fast, but the feed rate is not high. When removing rough metal from the surface, grinding the head cannot arbitrarily change its position. In addition, honing is a fully automatic process compared with grinding, which reduces the consumption of human resources in the process of workpiece processing, greatly reducing the consumption of human resources.