JPS58155134A - Manufacture of positioning jig - Google Patents

Abstract

PURPOSE:To enable hardening of a narrow part, to make a thermal strain small and to make refinishing processing unnecessary, by hardening the surface of a fitting groove for a work of a positoining jig by irradiation of a laser beam to its surface. CONSTITUTION:The positioning jig 2 whereon a plurality of fitting grooves 3 for inserting works are machine-processed is mounted on a rotary table 6 to be secured and a laser beam 7 is irradiated onto the upper surface of jig 2 under rotating. Upon completion of treatment of the surface, hardening is carried out by irradiation of a laser beam similarly on the surface of a side wall of a groove part of the jig 2 while tilting and rotating the table 6.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Summary of the Invention] The present invention relates to a method for manufacturing a positioning jig for mounting a workpiece to perform processing such as cutting and drilling on a bowl-shaped workpiece knee.

[Technical background of the invention]

For processing such as cutting and drilling of bowl-shaped workpieces such as brackets of rotating electric machines, position the @-shaped workpiece (1) using the iron stand III (31 arrow) of the positioning jig (2) as shown in Figure 1. Lower and fit # (3) Position by aligning the K and perform the cutting force using the processing tool (4). Number of mating #1I
(3) is a provision.

Figure 2 shows the relationship between the bowl-shaped workpiece (1) and the positioning jig (2).
It is inserted into the sand groove 3). This mating @
The contact direction (5) shown by the one-dot chain line in 131 is wear resistant because the bowl-shaped workpiece (1) is repeatedly attached and detached. The hardness of the contact surface (5) is made high by a method such as frequency hardening.

[Oboro point of background technology]

However, the former method, in which the entire positioning jig (2) is hardened, is unavoidably deformed by the heat flK, and in anticipation of the deformation, the finishing machining allowance is increased, and the finishing machining time becomes long. In addition, when frequency hardening the latter contact surface (5), the cost is lower than that of whole hardening, but the fitting groove (3)
Since only the upper part of the side wall of the groove can be hardened, the groove as a whole has poor wear resistance and a short service life.

[Purpose of the invention]

This invention #i was developed in view of the above-mentioned drawbacks, and aims to provide a method for manufacturing a positioning jig that hardens only the fitting groove and has excellent wear resistance and does not affect other parts. .

[Outline of invention cost]

In other words, if laser light is irradiated as a means of surface hardening, the desired area will be 4tP1! It produces a metal layer with high hardness, and can be partially quenched in narrow areas. -Thermal distortion is minimal and refinishing is not required.

[Inquiry about implementing the invention]

An embodiment of the present invention shown in the drawings will be described below. In Fig. 3, a plurality of fitting grooves are machined and a positioning jig (2) is fixed on a rotary table (6) which can be rotated by a drive unit (not shown), and a beam beam (7) is applied from above. A laser beam emitting device (not shown) simultaneously irradiates the vicinity of the surface of the fitting II (31). At this time, in order to effectively apply the laser energy, A heat absorbing material is applied to prevent reflection of the laser beam.From this state, the rotary table 16+ is rotated in the direction of the arrow, and the laser beam (7) goes around the positioning jig (2) to irradiate the desired area. .

The side wall of the fitting groove (3) is connected to the rotary table (6) as shown in Figure 4.
; can be adjusted to any corner [
Set # to emit laser light (7) from above.

Ru.

Next, the effect is Ii! I will clarify. Laser light (7) is irradiated and hardened on the surface of the required portion by rotating the hole positioning jig (2). The deep part of the fitting #1I (3) is irradiated and hardened by tilting the rotary table (6). Surface hardening by laser requires energy m of laser light (7)
Since the temperature is extremely low, only the irradiated area undergoes structural metamorphosis within a short period of time, so there is almost no thermal effect on other areas, and the amount of gold is small, so finishing is not required.

Furthermore, since it is possible to partially harden the jig, it is also possible to manufacture the jig using relatively inexpensive steel material. For example 54
Irradiate the 5C material with laser light to convert it into partial values, and the result is fI
A degree of 52 degrees was obtained, and the jig was able to function satisfactorily.

〔Effect of the invention〕

As described above, according to the present invention, as a method for manufacturing a positioning jig, after machining the fitting groove, the surface of the fitting groove is irradiated with laser light to harden the surface. It is possible to generate a metal layer with the required hardness only in the desired areas, it is possible to partially harden narrow areas, and there is no need for rework because there is only slight thermal distortion. Because it has a high energy density, it can be processed in a very short time, and has excellent effects such as low productivity.

[Brief explanation of drawings]

#I1 Figure is a perspective view showing a conventional positioning jig. Figure 2 is a vertical cross-sectional view showing the mounting part in Figure 1. Figure 3 is a positioning diagram showing an embodiment of the method for manufacturing the positioning jig of the present invention. FIG. 4 is a vertical cross-sectional view showing the irradiation state of the laser beam when the jig is rotated, and FIG. (2)...Positioning jig (3)...Fitting groove (6
1...Rotary table (7)...Laser light agent Patent attorney Inoue-Male 1st cause 2nd figure

Claims (1)

[Claims] 1. After machining a plurality of common fitting grooves in a bowl-shaped workpiece with N dimensions, tRrjjJ hardening is performed by irradiating a laser beam onto the surface of the fitting grooves. A method for manufacturing a positioning jig as qIiill. 2. A method for manufacturing a positioning jig as set forth in claim 1, which comprises rotating the positioning jig and irradiating it with laser light. 3. A method for manufacturing a positioning jig as set forth in claim 1, characterized in that the positioning jig is rotated at an angle and irradiated with a laser beam.