JPH02122016A - Groove hardening equipment using laser light - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for hardening V-shaped grooves and the like used as sliding surfaces with laser light.

[U.S.-based technology] Conventionally, as a hardening device for ■-shaped grooves ff1SkIf,
The main method is induction hardening, but other methods include carburizing, water,
Oil quenching is also used.

However, in induction hardening, carburizing hardening, water, oil hardening, etc., quenching distortion is large and a large amount of time is wasted in post-processing.

For this reason, materials that have been hardened with laser light are also used. As shown in Fig. 4, an absorbent is applied to the grooves of the base material 1 to improve the absorption characteristics of the laser beam, and then each wall surface of the groove is individually irradiated with the laser beam 2 for hardening. It is something. In this case, when the carbon dioxide slave with IKW output was used at an incident angle of 45°, the conveyance speed of the material to be quenched was approximately 0°3 m/min.

[Problem to be Solved by the Invention 1] However, even when laser light is used for hardening, the process of applying a laser absorbent before hardening and removing it after hardening increases, which is too big in terms of work environment and cost. No benefits were obtained. Furthermore, since each wall surface is laser hardened one by one, as shown in FIG. beam 2
There was a problem in that the hardness decreased due to tempering caused by light reflected from the slope of the steel.

The present invention has been made to solve the above problems,
The object is to provide a groove hardening device using a laser beam that can harden the groove uniformly through a simple configuration and process, and does not cause tempering during the process.

[,#! Means for Solving the Problem) In order to achieve the above object, the present invention provides a laser beam emitting means that emits a laser beam containing P waves, and a laser beam emitting means that emits at least two laser beams. A laser beam splitting means that splits the laser beam into laser beams, and a laser beam splitting means that refracts or reflects each laser beam split by the laser beam splitting means, and directs each laser beam to the groove to be hardened at an incident angle substantially concave to the Brewster's angle. It is essential to have a laser beam guide means for guiding the laser beam in the direction of irradiation.

[Function] In the present invention having the above JC termination, the laser beam irradiated from the laser beam emitting °F-stage is divided by the laser beam splitting means and then guided by the laser beam guiding means to the hardened object. enters the groove. The incident angle of this laser beam is substantially concave with the Brewster's angle, and the P wave in the laser beam is absorbed by the groove to be hardened, thereby hardening the wall portion.

Example E] An example embodying the present invention will be described below with reference to the drawings.6 First, the aft! The shape of the slide 10 having a V-shaped groove that is hardened will be explained.

As shown in FIG. 2, this slide 10 has V-shaped grooves formed by slopes having angles of 45° and 135° with respect to the horizontal surface 11. This device is designed to harden this sloped portion.

Next, the configuration of this V device will be explained with reference to FIG.

A jig (not shown) for fixing the slide 10 is movable in the direction of the groove of the slide 10 (in the direction of arrow A in FIG. 2) while the slide 10 is fixed. A carbon dioxide laser oscillator 21 is attached to the upper part of the jig at a point along its moving path. This carbon dioxide laser oscillator 21 irradiates a linearly polarized laser beam of 1 kilowatt along the line of symmetry of the groove of the slide 10.

A split mirror 22 is attached between the carbon Fin' laser oscillator 21 and the slide 10.

The split mirror 22 is a flat mirror bent in an inverted V shape, with the upper side of the mirror serving as a reflective surface, and is mounted symmetrically with respect to the line of symmetry. Therefore, the laser beam emitted by the carbon dioxide laser oscillator 21 is divided into two directions symmetrical with respect to the line of symmetry, as shown in the figure.

In each path of these two divided laser beams,
Reflection mirrors 23, 24 are installed. These reflecting mirrors 23 and 24 reflect the divided laser beams and form an incident angle of 80° to 80° on the inclined surface of the slide 10.
Its position and angle are adjusted so that it is incident at 5°.

This angle of incidence of 80° to 85° corresponds to the Brewster angle, and as shown in Figure 3, P
Waves are absorbed with approximately 80% efficiency and converted into heat.

The operation of this device configured as above will be explained below.

The slide 10, which is the object to be hardened, is fixed to a jig and moves in the direction of the groove at a speed of 0.2 meters/min.

The tip of this slide 10 is the carbon dioxide laser oscillator 2.
1, the linearly polarized light emitted from the laser oscillator 21 is split into two directions by the splitting mirror 22, as shown in FIG.
Said slide 10 by reflective mirrors 23, 24 respectively.
The light is incident on the three slopes at an angle of incidence of 8()° to 85°.

The P-wave component of the laser beam incident on this slope is absorbed with approximately 80% efficiency and is converted into thermal energy to harden the slope. Also, regarding approximately 20% of the reflected laser light,
incident on the other slope. At this time, that portion is also being heated by the laser beam, and is not tempered by the approximately 20% energy of the reflected laser beam.

With this device, although no absorbent or the like is used, it is possible to obtain absorption characteristics comparable to those of the conventional method, and since each slope is quenched at the same time, the quenching can be carried out quickly.

[Effect of the invention 1 As detailed above, the present invention has the advantage of being able to harden with high efficiency without applying an absorbent, and also to shorten the treatment process because each slope can be hardened at the same time. It has a positive effect.

[Brief explanation of the drawing]

1 to 3 are used to explain an apparatus according to an embodiment of the present invention, therefore, FIG.
The figure is a perspective view illustrating the outer shape of a slide hardened by this device, and FIG. 3 is a graph illustrating the relationship between the incident angle and absorption rate for P waves. Further, FIG. 4 is an explanatory diagram illustrating the state of hardening when a conventional device is used. In the figure, 21 is a carbon dioxide laser oscillator corresponding to the laser beam emitting means, 22 is a dividing mirror corresponding to the laser beam dividing means, and 23 and 24 are reflecting mirrors corresponding to the laser beam guiding means.

Claims (1)

[Claims] 1. A laser beam emitting means that emits a laser beam containing P waves; and at least two laser beams emitted by the laser beam emitting means.
A laser beam splitter that splits the laser beam into more than one laser beam, and a laser that guides each laser beam split by the laser beam splitter in a direction to irradiate the groove to be hardened at an incident angle substantially the same as the Brewster angle. 1. A groove hardening device using a laser beam, comprising a light guide means. 2. A groove hardening device using a laser beam according to claim 1, wherein the laser beam emitting means emits a linearly polarized laser beam.