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What Three Aspects of Precision CNC Machined Parts need Special Attention?

Mar. 27, 2020

The precision machining industry has always been a labor-intensive, capital-intensive and technology-intensive industry, with high industry barriers. The procedures of Precision CNC Machined Parts have extremely strict requirements. A little carelessness during processing will cause the workpiece error to exceed the tolerance range, and it will need to be reprocessed or the blanks will be scrapped, which greatly increases the production cost.

Precision CNC Machined Parts

Precision CNC Machined Parts

The following CNC Milling Parts Manufacturer will also introduce you in detail.

First of all, the requirements in terms of dimensions, we must strictly follow the form and position tolerance requirements of the drawings for processing. Although the components processed and produced by the enterprise will not be exactly the same as the dimensions of the drawing, the actual dimensions are within the tolerance range of the theoretical dimensions, which are all qualified products and can be used parts.

Secondly, for equipment requirements, roughing and finishing should be performed using equipment with different properties. Because the roughing process cuts most parts of the blank, the workpiece will generate a large amount of internal stress when the feed is large and the cutting depth is large. At this time, finishing cannot be performed. When the workpiece is finished in a certain period of time, it should work on a higher-precision machine so that the workpiece can achieve high accuracy.

Once again, the processing of precision parts often has surface treatment and heat treatment processes. Surface treatment should be placed after precision machining. And in the precision machining process, the thickness of the thin layer after surface treatment should be considered. Heat treatment is to improve the cutting performance of the metal, so it needs to be performed before machining.

Our precision machining produces some noise. How can we reduce these noises?

We need to reduce our noise as much as possible through the following points.

1. Production should be more standardized

More than 30% of the gear transmission noise comes from burrs and bump injuries. In some precision machinery parts processing factories, it is a passive practice to remove burrs and bumps before the gearbox is assembled.

2. The accuracy of the gear needs to be guaranteed

The accuracy of the size of the gear hole is required to be distributed around the middle difference of the deviation value of the hole, and it is set to ± 0.003 ~ ± 0.005mm; if it is too poor and is within the design requirements of the hole, it must be classified and transferred to the tooth cutting process.

Basic requirements for gear accuracy: It has been verified in practice that gear accuracy must be controlled at GB10995-887 ~ 8, linear speed is higher than 20m / s gear, limit deviation of tooth pitch, radial run-out tolerance of ring gear, and tooth direction tolerance must be stably achieved. 7-level accuracy.

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