Method for machining small deep hole of part by using peck type variable speed drilling

Abstract

The invention relates to the technical field of machining of a small deep hole of a mechanical part, in particular to a method for machining the small deep hole of the part by using peck type variable speed drilling. Small deep hole punching treatment is performed on drill bit rotation speed and a drill bit in a small deep hole machining process of the part, and further the phenomenon that the drill bit is broken does not occur when the small deep hole of the part is machined; the use of high-pressure cooling liquid is combined, so waste chips can be fully discharged during drilling of the drill bit to avoid obstruction of the drill bit and improve the drill bit punching efficiency; then the drill bit rotation speed is controlled to a certain extent, further the damage caused to the drill bit by elasticity or vibration produced at the moment of punching of the small deep hole is avoided, and further the machining cost of the small deep hole of the part is reduced.

Description

technical field [0001] The invention relates to the technical field of micro-deep hole processing of mechanical parts, in particular to a method for processing micro-deep holes of parts by adopting peck type variable-speed drilling. Background technique [0002] There are many processing methods for tiny deep holes on parts, and they are also widely used in the processing of parts for precision instruments; for the processing methods of small deep holes, there are drill drilling, electric spark drilling, and laser drilling in the prior art. Drilling or ultrasonic drilling, etc.; and these processing technologies in the existing technology have relatively serious technical defects. These technical defects will not only affect the quality of the tiny deep hole processing on the part, but also lead to the completion of the part. The qualification rate when it is later used in a certain equipment for equipment, which in turn leads to a higher processing cost of the parts and a l...

AI Technical Summary

Problems solved by technology

[0002] There are many processing methods for tiny deep holes on parts, and they are also widely used in the processing of parts for precision instruments; for the processing methods of small deep holes, there are drill drilling, electric spark drilling, and laser drilling in the prior art. Drilling or ultrasonic drilling, etc.; and these processing technologies in the existing technology have relatively serious technical defects. These technical defects will not only affect the quality of the tiny deep hole processing on the part, but also lead to the completion of the part. The qualification rate when it is used in a certain equipment for equipment, which leads to higher processing costs and lower qualification rate of parts

For example, electric discharge machining of tiny deep holes will lead to rough surface of parts, poor dimensional accuracy and high production cost; laser machining of tiny deep holes will lead to low surface roughness of parts, but poor dimensional accuracy, and Affected by output power and focus, it is only suitable for processing on thin plates, which further leads to poor universality; while ultrasonic micro deep hole processing is only suitable for processing on brittle materials, so it is more commonly used in the field of mechanical processing The most cost-effective processing technology is drill drilling. The reason is that drilling has high productivity and is not limited by material characteristics. The processed tiny holes have a large aspect ratio, high surface quality and high processing accuracy. A processing method with great advantages in economy, precision and efficiency

[0003] However, due to the small diameter of the drill bit in the conventional drilling method, its rigidity and strength are extremely low. When the small hole is about to be drilled, the drill bit will be broken due to the elastic force generated by the part and the machine tool. It is difficult to remove iron filings, which makes the drill bit easy to damage, and due to the difficulty of heat dissipation in the processing area, the temperature of the drill bit is high and the service life is low