Ball screw induction quenching treatment method

A ball screw, induction hardening technology, applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., can solve the problems of unsatisfactory hardening effect, prolonged heating time, magnetic line divergence, etc. Hardness, the effect of improving the magnetic flux leakage phenomenon

Inactive Publication Date: 2019-03-05
南京雄豹精密机械有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In end face induction hardening, when the magnetic field lines encounter holes or grooves, due to the influence of air on the metal surface of the holes or grooves, there will be magnetic flux leakage, that is, the magnetic force lines diverge and the magnetic flux density is small.
The occurrence of magnetic flux leakage will lead to the heating temperature of the groove and prolong the heating time, resulting in unsatisfactory hardening effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The present invention will be further described below in conjunction with specific examples.

[0021] A method for induction hardening of a ball screw, comprising the steps of:

[0022] (1) Preheat the ball screw rod;

[0023] (2) Thread the preheated ball screw rod;

[0024] (3) Crush the magnetizer to make mud, and coat it on the groove of the ball screw after threading, and then scrape off the excess mud-like magnetizer to make the screw uniform in thickness; after coating the magnetizer Leave it at room temperature for 2-4 hours until the mud-like magnetizer is completely dry;

[0025] (4) Make the induction coil of the heating inductor similar to the shape of the lead screw, and then use the heating inductor inclined at 30° to perform profiling induction hardening on the ball screw coated with the magnetizer.

[0026] In step (1), the preheating treatment includes spheroidizing annealing treatment or quenching and tempering treatment, and the specific steps are ...

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Abstract

The invention provides a ball screw induction quenching treatment method. The ball screw induction quenching treatment method comprises the steps that (1), preheating treatment is conducted on a ballscrew bar; (2), threading is conducted on the ball screw bar obtained after preheating treatment; (3), a groove of a threaded ball screw is coated with a muddy magnetic conductor, and the coated ballscrew is placed at room temperature for 2-4 h till the muddy magnetic conductor is dry completely; and (4), induction quenching is conducted on the ball screw coated with the magnetic conductor by adopting a heating inductor which inclines 30 degrees. According to the ball screw induction quenching treatment method, the rolling groove is coated with the magnetic conductor, and therefore the magnetic leaking phenomenon of the screw rolling groove in the induction quenching process can be effectively improved; and induction quenching is conducted on the ball screw coated with the magnetic conductor by adopting the heating inductor which inclines 30 degrees, and therefore the hardness and the effective hardened layer depth of a rolling way and hardened layers at the edges of the rolling way are further increased.

Description

technical field [0001] The present invention relates to the technical field of ball screw production, in particular to a ball screw induction hardening treatment method. Background technique [0002] Ball screw is a rolling functional component that converts rotary motion into linear motion, and is an important part of various precision mechanical equipment such as CNC machine tools and precision instruments. The ball screw needs to withstand bending, torsion and impact during work, and at the same time, it must bear friction on the sliding and rotating parts. It is a workpiece that bears alternating loads such as torsion and bending. This type of workpiece requires the surface to withstand higher stress than the inner core. And friction, that is, the surface of the workpiece is required to have high hardness, high strength and sufficient wear resistance. [0003] Induction hardening can quickly form a quench hardened layer with high hardness and high wear resistance on the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/00C21D1/10C21D1/70C21D1/32C21D1/25
CPCC21D1/10C21D1/25C21D1/32C21D1/70C21D9/0068Y02P10/25
Inventor 郑三豹
Owner 南京雄豹精密机械有限公司
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