JPH0788664A - Method for working surface of sliding member of press machine - Google Patents

Abstract

PURPOSE:To improve the flatness of the surface of a member by fusing and removing the cut surface of the member with a peak part caused by machining with the irradiation of a laser beam, and to make a recessed part which becomes an oil basin on a surface to be machined by fusing and vaporizing the surface of the member with a laser beam. CONSTITUTION:The device is constituted of a device controlling the output of a laser beam and a irradiation time, a laser beam irradiation device consisting of a laser head 3 with a laser beam irradiation port 4 and a laser beam guide tube 2, and a member 1 which becomes an object to be worked.

Description

Detailed Description of the Invention

[0001]

[Industrial field of application] Processing of parts of press machines that require highly accurate surface roughness.

[0002]

2. Description of the Related Art Cutting and grinding lapping finishes are carried out by machine tools, but in both cases, spire-like irregularities remain during machining. Therefore, when these members are used as the sliding member, the tip of the spire may come into contact with the mating member and seizure may occur.

[0003]

The direct cause of the seizure of the sliding member is oil shortage, but by removing the sharp tip of the steeple on the machined surface and making it a smooth surface, an additional oil sump is created. As a result, even if the oil film is thinned, seizure is reduced, and the clearance between members can be made smaller than before.

[0004]

As long as the surface roughness of the member is made fine by cutting or grinding by machining, the sharp spiers are not eliminated. The volume of the spire is small and the heat capacity is small. The surface area is large relative to the volume. Therefore,
With a little light energy, the tip of the steeple can be brought to the melting temperature. The heating is performed by using a laser having a high energy density in order to reduce heat invasion into the inside of the member. Further, it is further irradiated to form a recess on the surface of the member.

[0005]

The laser light can be irradiated with a very high energy per unit area in a very short time. By controlling the output of the laser beam and the irradiation time, the sharp pointed tip of the machined surface of the member is melted and flattened. By melting and evaporating the surface of the member with a laser, a concave portion serving as an oil reservoir is formed on the machined surface.

[0006]

EXAMPLES Examples of the sliding member surface processing method of the present invention will be described with reference to FIGS. Boring /
Machined parts such as lathe and grinding (1)
The surface has a steeple-shaped cutting surface as shown in FIG. Although not shown in FIG. 1, a laser head (3) equipped with a device for controlling the output of laser light and irradiation time, a laser irradiation port (4), and a laser guide tube (not shown).
The flatness of the surface of the member (1) as shown in FIG. 3 can be improved by melting and removing the steeple portion of the surface of the member (1) by the laser irradiation device composed of (2). Also, FIG.
It is possible to form a recess which becomes the oil sump (5) as shown in FIG.

[0007]

As described above, according to the present invention, it is possible to obtain a member surface having a high flatness with a small unevenness difference with respect to the member cutting surface finished by machining, which has a ripple effect in many fields. can give.

[Brief description of drawings]

FIG. 1 is a schematic view of processing of an embodiment of the present invention,

FIG. 2 is a diagram showing a surface state of a member by machining,

FIG. 3 is a diagram of a member surface state in a machining outline diagram,

FIG. 4 is a diagram showing the state of the surface of the member in the processing outline diagram,

[Explanation of symbols]

1 member, 2 laser guide tube, 3 laser head, 4
Laser irradiation port, 5 oil sump

Claims (2)

[Claims] 1. A method for processing a sliding member surface of a press machine, characterized in that a steeple-shaped surface irregularity produced by machining is melted and removed by a laser beam to obtain a smoothly curved sliding member surface. 2. The surface of a sliding member of a press machine according to the processing method of claim 1, wherein the surface is melted and removed by laser irradiation to form a recess on the machined surface which becomes a sliding portion to form an oil sump on the surface. Processing method.