Production method for high-precision rolling ball screw

Abstract

The invention relates to a production method for a high-precision rolling ball screw, comprising the following steps: coarse straightening; coarse external grinding; semi-accurate external grinding; accurate external grinding; accurate external grinding; final inspection; thermal treatment quenching; tempering; wire wheel polishing; buffing; and rust protection and storage, i.e. after a screw rodis polished, washing the screw rod with carbon oil, qualifiedly coating rust-preventative oil on the screw rod, putting the screw rod into a plastic bag, and putting into a storage for later use. Theinvention has the following beneficial effects: the material consumption is less, the processing cost is low, the production efficiency is high, the processing cycle is short, and the batch production can be realized easily; and the ball screw cold rolling ensures that a workpiece is subjected to cold extruding between a roll machine and two roller wheels, thus the workpiece is subjected to plastic deformation (shaping) to be provided with standard threads and is subjected to axial movement so as to enable the threads to be prolonged to 6000mm.

Description

technical field [0001] The invention relates to a production method of a high-precision reforged ball screw. Background technique [0002] At present, ball screws generally adopt intermediate frequency induction hardening. In production, it is often found that after the intermediate frequency quenching (tempering) screw is ground, the magnetic flaw detection inspection often shows axial or reticular cracks on the arc of the thread raceway, even after grinding. It can be found only by the naked eye during the thread cutting process, thus causing the screw rod to be scrapped. This not only causes direct economic loss to the enterprise, but also brings greater pressure to the front-line operators of the enterprise because of the various factors causing the problem. [0003] In order to improve competitiveness, reduce resource consumption and waste, give full play to the availability of resources, and be responsible for environmental protection, Delia keeps pace with the times...

AI Technical Summary

Problems solved by technology

2. The intermediate frequency quenching heat treatment of the screw rod is not mainly manifested as high quenching temperature or insufficient tempering

3. The process parameters of the lead screw processing are not standardized. This reason causes the lead screw with grinding cracks to account for about 30% to 40% of the total.

What's more, the grinding heat even makes the surface temperature of the lead screw rise to the "quenching temperature" of the lead screw material. Under the cooling effect of the grinding fluid, the surface of the lead screw forms a "secondary quenching", resulting in surface grains Coarse, reducing the yield strength of steel, causing cracks on the surface of the screw