JP2009195801A - Method of working metal made workpiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the following problem: the decoration of the metal made workpiece is performed by pasting a cellophane on a part not required to be coated and requires high technique for fine coating including a fine pattern to cause restriction on the manufacture or the compromise about designs. <P>SOLUTION: A method of working the metal made workpiece includes: a grinding step (A) of finishing the surface of the metal made workpiece 1 into a glossy surface 1a; a coating step (B) of coating the glossy surface 1a with a coating film 1b; and a laser irradiation step (C) of masking 1c a coating film 1b by irradiating the coating film 1b with laser; wherein the masking 1c in the laser irradiation step (C) is carried out by irradiating the coating film 1b with the laser having weak output in a degree of peeling off the coating film 1b but, giving no damage to the glossy surface 1a, the laser irradiation step (C) including a step of repeating a plurality of times and after the laser irradiation step (C), a coating step (D) of forming a top coat after the carrying out of the laser irradiation step (C) is included. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for processing a metal workpiece, and more particularly to a method for decorating a metal workpiece such as aluminum or stainless steel for home appliances, OA devices, mobile devices, automobile parts, cosmetic containers, and the like. It is.

  Conventionally, metal workpieces such as aluminum and stainless steel have been widely used for housing and various parts such as home appliances, OA equipment, mobile equipment, automobile parts, cosmetic containers, etc. Painting has also been actively performed, and the purpose of painting was to protect the metal surface, but gradually the emphasis is placed on decoration.

  However, painting of metal workpieces is done by attaching cellophane tape or masking tape to areas that do not require painting, but it is sophisticated to paint finely, including fine patterns and letters. This technology is necessary, and production constraints and design compromises are born.

Therefore, the step (1a, 1b) of forming the protective layer 2 on the surface of the metal member 1, the step (1c) of forming the masking coating 3 on the protective layer 2, and laser light irradiation, which have been disclosed previously, At least a step (1d) of patterning the masking film 3 and a step (1e) of etching the metal member 1 using the masking film 3. The processing by laser light is performed by removing a part of the protective layer 2 and the metal member 1 together with the masking coating 3 (see Patent Document 1), a step of providing a workpiece, and a laser engraving equipment to laser the surface of the workpiece. A surface treatment comprising: a step of engraving to form a required graphic code on the surface of the workpiece; and a step of using a protective dura on the workpiece after laser engraving Method. With the introduction of laser engraving process, the surface treatment process of metal / non-metal appearance parts is performed to engrave the required mark, decoration pattern and hairline processing effect, and then the transparent dura is sprayed. The production quality and production efficiency of the coated product and the added value of the product can be improved. In the present invention, there are methods such as a method for producing a metal product having a unique and excellent surface decoration treatment (see Patent Document 2) by combining with conventional painting, printing, laser engraving process, and the like.
JP-A-11-256364 JP 2006-212647 A

  However, the device disclosed in Patent Document 1 disclosed earlier removes a part of the metal member 1 when performing at least the step (1d) of patterning the masking film 3 by irradiating the laser beam. Further, the one described in Patent Document 2 includes a surface treatment process of a metal / non-metallic appearance part by introducing a laser engraving process, but the surface of the appearance part is engraved. Thereafter, a protective dura is applied.

  In view of the above-mentioned problems, as a result of diligent research, the metal workpiece processing method of the present invention has a polishing process for finishing the surface of the metal workpiece to a glossy surface, and a coating film on the glossy surface polished by the polishing process. And a laser irradiation process that marks the coating film by irradiating the coating film coated by the coating process. The marking in the leather irradiation process peels the coating film but damages the glossy surface. In addition, it includes a step of repeating the laser irradiation step a plurality of times, and further includes a coating step of forming a top coat after the laser irradiation step. It is a waste.

  The metal workpiece processing method of the present invention applies a coating film to the polished glossy surface of the metal workpiece surface, and the laser irradiation marking peels off the coating film, but the gloss of the metal workpiece surface is glossy. The surface is irradiated with a weak laser beam that does not cause damage, and if the glossy surface is not exposed by a single laser irradiation, the surface is irradiated repeatedly with a laser. Only the part that was peeled off by laser irradiation exposed the polished glossy surface of the metal workpiece, and the laser irradiation enabled fine expression on the metal workpiece, and the coating film was peeled off. The glossy surface is exposed in a shiny and polished state, and it is an innovative and highly practical invention that can easily express beautiful and detailed decoration.

  The metal workpiece processing method of the present invention will be described below in detail with reference to the drawings of the embodiments. FIG. 1 is a flowchart of an embodiment of the metal workpiece processing method of the present invention, and FIG. It is explanatory drawing for description of the Example of the processing method of metal workpieces.

  The present invention relates to a method for processing a metal workpiece, and more particularly to a method for decorating a metal workpiece such as aluminum or stainless steel for home appliances, OA devices, mobile devices, automobile parts, cosmetic containers, and the like. The method of processing a metal workpiece according to claim 1 is applied to a polishing process A for finishing the surface of the metal workpiece 1 to a glossy surface 1a, and a glossy surface 1a polished from the polishing process A. A coating process B for applying the film 1b, and a laser irradiation process C for marking the coating film 1b with laser irradiation to the coating film 1b applied by the coating process B. The marking 1c of the leather irradiation process C includes The coating film 1b is peeled off, but the glossy surface 1a is irradiated with a weak laser beam that does not damage the coating.

  Furthermore, the metal workpiece processing method according to claim 2 is characterized in that, in the metal workpiece processing method according to claim 1, the laser irradiation step C is repeated a plurality of times. It is.

  Furthermore, the metal workpiece processing method according to claim 3 is the metal workpiece processing method according to claim 1 or 2, wherein a top coat is formed after the leather irradiation step C is performed. It is characterized by including.

  That is, the metal workpiece 1 of the embodiment of the metal workpiece processing method of the present invention is mainly made of a metal such as aluminum or stainless steel such as home appliances, OA equipment, mobile devices, automobile parts, cosmetic containers, etc. It is a part that requires decoration.

  In the polishing process A, the surface of the metal workpiece 1 is finished to a glossy surface 1a by polishing and is preferably performed by puffing or barrel polishing. The entire workpiece 1 is polished. However, only the necessary part of the workpiece 1 may be polished.

  Next, the coating process B is to apply the coating film 1b to the glossy surface 1a polished from the polishing process A, and generally forms the coating film 1b by spray coating. The surface of 1 is protected and decorated.

  Next, as shown in FIG. 1, the laser irradiation process C is performed by reflecting the laser beam from the laser oscillator 2 through the mirror 3a of the optical system 3 and irradiating the work 1, and the laser beam is absorbed by the coated film 1b. By doing so, the coating film 1b is destroyed, and the processing by the laser can produce a fine marking 1c as is well known.

  The marking 1c in the laser irradiation step C is for irradiating a weak laser beam that does not damage the glossy surface 1a while the applied coating 1b is peeled off. The laser 1 depends on the type and thickness of the coating 1b. The output is adjusted.

  Furthermore, when the marking 1c that satisfies the laser irradiation step C is not possible, the laser irradiation step C is repeated a plurality of times, but the applied coating 1b is peeled off, but the glossy surface 1a is damaged. It is implemented so as not to give.

  Furthermore, in the coating process D, it coats in order to form a topcoat after implementing the leather irradiation process C as needed, and protects the coating film 1b and the glossy surface 1a.

  The metal workpiece processing method of the present invention applies a coating film to the polished glossy surface of the metal workpiece surface, and the laser irradiation marking peels off the coating film, but the gloss of the metal workpiece surface is glossy. The surface is irradiated with a weak laser beam that does not cause damage. That is, only the coating film is peeled off by laser irradiation, and the polished surface of the metal workpiece is exposed at the peeled site. With laser irradiation, fine expressions can be made on metal workpieces, and the glossy surface from which the coating film has been peeled is exposed in a shiny polished state, making it easy to express beautiful and detailed decorations. A method for decorating a workpiece is provided.

FIG. 1 is a flowchart of an embodiment of a method for processing a metal workpiece according to the present invention. FIG. 2 is an explanatory diagram for explaining an embodiment of the metal workpiece machining method of the present invention.

Explanation of symbols

A Polishing process B Painting process C Laser irradiation process D Coating process 1 Work 1a Glossy surface 1b Paint film 1c Marking 2 Laser oscillator 3 Optical system 3a Mirror

Claims (3)

  A polishing process for finishing the surface of a metal workpiece to a glossy surface, a coating process for applying a coating film to the glossy surface polished by the polishing process, and a coating applied by the coating process by irradiating with leather A laser irradiation step of marking a film, wherein the marking of the laser irradiation step irradiates a weak output laser beam that peels off the coating film but does not damage the glossy surface. Processing method.   The method for processing a metal workpiece according to claim 1, comprising a step of repeatedly performing the leather irradiation step a plurality of times.   The metal workpiece processing method according to claim 1, further comprising a coating step of forming a top coat after performing the leather irradiation step.

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