Method for improving cutting precision of screw tap and prolonging service life of screw tap

Abstract

The invention discloses a method for improving the cutting precision of a screw tap and prolonging the service life of the screw tap. The method comprises the following steps that firstly, grease is brushed off from a cutter seam of the screw tap, and then the screw tap is put into an ultrasonic cleaning tank for deoiling cleaning, then is dehydrated and air-dried, and then is put into a vacuum chamber; a gas ion source of a cold cathode is started, argon ions are adopted to bombard the surface of the screw tap, then an arc ion source is started, arc discharge is formed, arc discharge is generated on a graphite cathode target, and then carbon plasma is generated in an anode cylinder; the carbon plasma is led out of a discharge chamber through an electrode and filtered through a magnetic field, neutral and polymolecular graphite particles are filtered out, and a single carbon ion flow is formed; and the single carbon ion flow is focused through a magnetic lens to form an ion beam, and the ion beam is scanned through a deflection magnetic field and matched with a rotary table to form a deposition surface to be deposited on the screw tap, so that an amorphous tetrahedron carbon coating is formed.

Description

technical field [0001] The invention belongs to the technical field of ion beam material surface modification and new materials, and in particular relates to a method for improving the cutting precision and service life of a tap. Background technique [0002] In recent years, non-ferrous metals such as aluminum alloys, stainless steel, titanium and titanium alloys have been used more and more in industrial products. However, due to the high toughness and high processing viscosity of these alloys, certain difficulties will be brought about in processing, such as using Tool bonding leads to breakage and damage to surface processing accuracy. Most of the coated tools on the market are nitride coatings, which have three obvious disadvantages. One is the thickness of the coating, which is generally 3-5 microns; the other is the coefficient of friction. Large, generally around 0.4; Third, the surface finish is not good. [0003] A thick coating will lead to a decrease in sharpnes...

AI Technical Summary

Problems solved by technology

[0004] In addition, due to the strict requirements on the processing size compared with the tap, the currently commonly used nitride coating is thicker, and the diameter of the tap will increase after coating, resulting in a change in the processing size, that is, the size of the screw hole increases, and the nut Not suitable, so most of the taps in the market are not coated, and some coated taps are produced by tool factories after adjusting the size according to customer needs, which requires changing the original production size of the taps, which brings troubles to production

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