Tooth ring tooth surface laser induration processing method

Abstract

The invention relates to a laser hardening treatment method for a gear surface of a gear ring, which is characterized the in that: laser hardening treatment methods for the two side surfaces of each gear of the gear ring (1) and the top of the gear thereof are the same; the processing method thereof is described as follows: 1) the gear ring is arranged in the clamp of a rotary working platform; the direction of the length of the gear is vertical to the surface of the rotary working platform; 2) the upper end of the gear ring is provided with a light shielding ring; 3) the laser hardening treatment parameters, such as a laser power, a laser beam scanning speed, the focus of a focus lamp, are reasonably matched; 4) the center of a light guide cylinder deviates from the center of the gear ring; 5) the layer beam enters into the processing surface of the gear side of the gear ring; 6) a guide head moves up and down to match the periodic rotating of the rotary platform with small angle and scale division; or the light guide head moves up and down and rotates to form a laser hardening zone at the processing surface; 7) a primary switch is blocked by light to finish laser hardening treatment on all the gear surface of the gear ring (1). The rigidity and the wear-resistance when the two side gear surfaces of each gear of the gear ring are engaged with the gear surface of a planet gear are improved; simultaneously, as the self-owned characteristics of laser quenching, the quenching deformation of the gear ring is very small which completely meets the technical demands for design and production.

Description

Technical field: [0001] The invention relates to a laser hardening treatment method for the tooth surface of a ring gear, which belongs to the processing method of automobile parts. Background technique: [0002] The ring gear is an important part in the deceleration and speed change mechanism of automobiles and other products, such as the ring gear of the automobile wheel reduction bridge, the ring gear of the automobile transmission, etc. The cooperation precision between the various parts in the deceleration and speed change mechanism is required to be high, and unbalanced load cannot be generated. Among them, the processing of the key component ring gear requires high precision, small heat treatment deformation, appropriate strength and high surface hardness. However, the ring gear is a large-scale thin-walled part, which is difficult to process and heat-treat. The most prominent problem is that the heat treatment deformation is large and difficult to control, resulting...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a laser hardening treatment method for the tooth surface of the ring gear, which uses a high-energy focused laser beam to quickly scan the workpiece, so that the surface temperature and speed of the irradiated metal or alloy rise above the phase transition point, and the laser beam When leaving the irradiated part, due to the effect of heat conduction, the cold matrix makes it cool rapidly and undergoes self-cooling and quenching to obtain a finer hardened layer structure, and the treatment deformation is small; the surface of the ring gear is strengthened, and the conventional thermal processing process is solved. Faced with the problem of large deformation of the ring gear

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