JPH07314994A - Engraving of metal - Google Patents

Abstract

PURPOSE:To form a pattern on the surface of an article made of a metal by applying a soft coat consisting of a base metal to the surface of an article of a metal and cutting off part of the coat using a numeral value-controlled machine tool. CONSTITUTION:A basic figure to be drawn on a grip P1 is drawn and is read, using an image sensor such as an image scanner, into a control device 25. Further, data on the profile of the grip P1 is entered into the control device 25, and a figure which is entered is converted to a shape along the outer surface of the grip P1 inside the control device 25. In addition, the movement amount of a cutter 20 in an axial direction at each coordinate position of the pattern of the grip P1 which is entered is calculated. This calculated value is arithmetically processed in relation to 1/7 of the outer periphery of the grip P1 and this processed value is recorded in memory. After holding the grip P1 at a specified position by a drive device C3, an orbital trace preserved in the control device 25 is pursued with the concurrent action to rotate the cutter 20. If the processing of a 1/6 pattern is completed, the grip P1 is rotated by 1/7 turn to repeat the processing and thus it is possible to form a pattern on the surface of the grip P1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal engraving suitable for engraving a pattern or a name on the surface of a metal pen stand or on the surface of a metal name tag showing the company name of a company or the name of an organization in a company. It relates to a processing method.

[0002]

2. Description of the Related Art Conventionally, as a name plate or name plate, a processing method such as cutting or pressing is applied to the surface of a metal plate to form a dent, and a character or pattern is formed by the dent, or paint is applied to the dent. It has been known. In recent years, it is known that such characters and patterns are realized by combining an image processing device and a numerically controlled machine tool, and people and photographs taken on the street can be impressed on the spot. ) And professions engraved on the drawing board have appeared.

[0003]

Generally, in order to perform such precise cutting, a cutting tool having a sharp cutting edge must be used, and a hard metal such as iron or copper alloy is used as a work material. Was not suitable in terms of tool life. Therefore, as the work material, a synthetic resin, paper, wood, or the like having good machinability is selected and used.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a surface of an article formed of metal with a coating softer than a bare metal, and a part of the coating formed on the surface of the article. The pattern is formed on the surface of the article by removing it with a controlled machine tool. Furthermore, specifically, the surface of the article molded of metal is expressed in coordinates, and a coating softer than the metal of the article is applied and part of the coating formed on the surface is numerically controlled. A pattern is formed on the deletion with a machine tool of the formula. Further, the soft coating may be an oxide film of a metal of a bare metal or a paint. The tool used for the cutting has a conical tip with a half of the conical tip removed on the axis, and a slight flat portion is formed at the tip.

[0005]

[Function] An article made by processing a metal is left in the atmosphere or subjected to chemical conversion treatment or coating to generate a soft film on the surface, or a coating is applied to form a coating film. . Then, attach this article to a numerically controlled machine tool or woodworking machine, and cut the required pattern or character with a slight incision from the coordinate position when processing the material or along the surface. Form.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. In FIG. 1, P is a ballpoint pen having a grip P1 processed by the method of the present invention, and PS is a pen stand for standing the ballpoint pen (hereinafter, both and other workpieces are simply referred to as articles. Express as B). On the surface of the article B, a non-slip M1 having a predetermined pattern along the surface and the owner's name or family crest M
A sculpture such as 2 is engraved.

As is well known, the ball-point pen P comprises a writing portion P2 which has an ink container and through which ink comes out, and a grip P1 for holding the writing portion P2 by hand. In this example, the material of the grip P1 is wood, and M1 is a non-slip pattern drawn on the peripheral surface of the grip P1. The pen stand PS is made of a copper alloy. That is, a material of a copper alloy or a zinc alloy is cut into a teardrop shape, and the end face on the enlarged side is cut obliquely to form a bottom portion, and a hole for supporting the ballpoint pen P is formed in a thin top portion. Then, after the mechanical processing is finished and before the surface is oxidized, a clear coating is applied or a chemical conversion treatment is performed to generate a beautiful color.

As described above, the grip P1 and the outer surface of the pen stand PS are surface-treated after being machined in advance by a numerically controlled woodworking machine or a machine tool. Further, as will be described later, since the tip of the tool for cutting this is thin and easily damaged, the surface texture after the treatment is easy to process and is preferably soft, and is softer than the material of the base material. It is preferable.

Next, the above-mentioned grip P1 and pen stand P
A method of forming the non-slip M1 and the owner's family crest M2 on S will be described. In this embodiment, the processing of the article B is performed while being supported by the upper and lower centers C1 and C2. That is,
As shown in FIGS. 3 and 5, the driving tool C3 is fastened to the outer periphery of the grip P1 by the bolt Bt, and thereby the driving tool C3 is rotationally driven. Specifically, it is performed by rotating it by 1/6 rotation.

8 and 9 show an end mill-shaped cutter 20 which is a cutting tool used for machining. Cutter 2
0 is made of high speed steel with a diameter of about 8 mm and its end 21
Is conically ground to make the tip thin. Then, a portion 22 left by removing half of the vicinity of the end portion on the axis is an edged tool having a substantially semi-cylindrical cross-sectional shape. Reference numeral 24 is an edge portion that serves as a cutting blade. Further, a slight flat portion 23 having a diameter of about 0.5 mm is left at the tip portion so that the cut surface becomes flat.

Next, the procedure of inputting and processing the processing information to the control device 25 for determining the locus of the cutter 20 will be described with reference to FIG.
The flow chart of FIG. First, a basic figure (pattern) drawn on the grip P1 as shown in FIG.
Is drawn and read into the control device 25 using an image sensor such as an image scanner (rectangular pattern input in the drawing). Then, a grip. The external surface shape of P1 is input, and the graphic input inside the control device 25 is gripped P
1 is converted into a shape along the outer surface, that is, a shape shown in FIG. 4B (same, XY figure deformation).

Next, the amount of axial movement of the cutter 20 at each coordinate position of the pattern of the grip P1 previously input,
That is, the cutter lift is calculated (Z cutter lift calculation). Such calculation is performed on the outer circumference of the grip P1 by 1
/ 7 is calculated and the figure is recorded in the memory (6
Save one-half pattern). The reason why the machining is divided every 1/7 rotation in this way is to prevent the axis of the cutter 20 from largely deviating from the axis of the grip P1.

In this way, after the grip P1 is supported at a predetermined position by the driving tool C3, the cutter 20 is rotated to trace the trajectory stored in the control device 25. When the processing of the 1/6 pattern is completed, the grip P1 is rotated 1/7 by the driving tool C3, and the processing is repeated. Then, the processing is completed by repeating this 6 times. However, the article B is a pen stand PS and the owner's family crest M
Of course, when the area to be cut is relatively flat, as in the case of engraving 2, the above-described repeated routine can be omitted.

In principle, the above-mentioned processing is carried out along the original shape previously processed by a numerically controlled machine. That is, the original shape of the article needs to be represented by information that can be transferred in the form of equations or other coordinates. Then, the cut amount T for the article B is set so that the paint applied on the original shape and the portion increased by the chemical conversion treatment are deleted, but the work piece with respect to the upper and lower centers C1 and C2. Since there is a case where the cutter 20 is shaken, the cutter 20 may be cut a little deep, for example, by a few tens to a few hundreds of microns. This state is shown in FIGS. 6 and 7 although the work material is different.

In this way, the cut article B is again subjected to clear coating and the like and put on the market. In the case of the embodiment, if left for several hours after cutting, the cut portion changes to white due to oxidation and the pattern becomes clear. After that, clear coating is applied to complete the product.

[0015]

As described above, according to the present invention, the surface of an article molded of metal is represented by coordinates, and the shape before surface treatment is stored as information, and the surface of the article is painted or coated. Since the surface is formed by applying the coating by the chemical conversion treatment and adding the information for the later processing to the information of the original shape, the processing becomes easy because the original information can be used. Furthermore, the processing that is added later is processing that removes the thin layer formed on the surface of the article, so it only requires light processing and does not require a large cutting force, so a precise pattern can be drawn with a thin tool. Has the effect of.

[Brief description of drawings]

FIG. 1 is an elevation view of a pen and a pen stand showing an example of an article manufactured by the method of the present invention.

2 is a flow chart for processing the article shown in FIG. 1. FIG.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a plan view showing an example of a pattern engraved on an article.

FIG. 5 is a side view showing a processed state of the article.

FIG. 6 is a side view showing another article.

FIG. 7 is a sectional view taken along line IIV-IIV in FIGS. 5 and 6.

FIG. 8 is a side view showing the tip of the cutter.

FIG. 9 is a sectional view taken along the line IX-IX.

[Explanation of symbols]

 B ... ・ Articles C1, C2 ・ ・ Upper and lower centers C3 ・ ・ ・ ・ Driving tool M1 ・ ・ ・ ・ Skidproof M2 ・ ・ ・ ・ ・ ・ Owner's family crest drawn on the enormous part P ・ ・ ・ ・ ・ ・ Ballpoint pen P1 ･ ･ ･ Grip P2 ･ ･ ･ Writing part of ballpoint pen P ･ ･ ･ Pen stand T ･ ･ ･ Cut amount 20 ･ ･ ･ Cutter 21 ･ ･ ･ End part 22 ･ ･ ･ Remaining part 23 ... Flat part 25 ... Control device

Continued Front Page (72) Inventor Isao Shirayanagi 3329 Kiga Hosoe-cho Inasa-gun Shizuoka

Claims (6)

[Claims] 1. A soft coating is applied to the surface of an article formed of metal, and a part of the coating formed on the surface is removed by a numerically controlled machine tool to form a pattern on the surface of the article. Engraving method of metal. 2. A surface of an article formed of metal is expressed in coordinates, and a coating softer than the metal of the article is applied, and a part of the coating formed on the surface is numerically controlled. A metal engraving method that uses a machine tool to delete patterns. 3. The method according to claim 1 or 2,
The soft coating is a metal engraving method, which is an oxide film of metal. 4. The method according to claim 1 or 2,
The method of engraving metal, wherein the soft coating is paint. 5. The method according to any one of claims 1 and 2,
A numerically controlled machine tool cutting tool is a metal engraving method in which the tip of a conical tip is removed half along the axis and a slight flat portion is formed at the tip. 6. The method according to claim 1 or 2,
The metal forming the article is zinc or a zinc alloy.