JP5424863B2 - How to assign a drill identification code - Google Patents

Description

  The present invention relates to a method for providing an identification symbol for a drill.

  In general, in a processing machine that performs processing by exchanging a plurality of drills, management of the drill is important for stable processing. For this reason, an identification symbol is given as one means for managing the drill. For example, Patent Document 1 discloses a drill in which an identification symbol by an oxide film is provided on the outer periphery of a shank by irradiating a laser.

  However, an identification symbol given by laser irradiation, for example, a bar code, is thinner than the center of the bar due to the influence of the power distribution of the laser beam, and the boundary of the bar end is less May become blurred. In particular, as in Patent Document 1, when the longitudinal direction of the cord is formed along the circumferential direction of the drill, it is more difficult to identify the end portion, and it may be difficult to recognize the cord practically.

JP 2003-071672 A

  The objective of this invention is providing the identification symbol provision method which can provide an identification symbol clearly with respect to a drill.

  In one embodiment of the drill identification symbol assigning method of the present invention, the surface of the drill is laser-irradiated at a first scan speed to perform a base treatment of the identification symbol pattern, A step of printing an identification symbol pattern by irradiating a laser at a second scanning speed lower than one scanning speed, and a laser irradiation at a third scanning speed higher than the second scanning speed for a pattern obtained by reversing the identification symbol pattern in black and white And processing the end of the identification symbol.

  In one embodiment, the first scan speed is 500 to 1200 mm / s, the second scan speed is 40 to 150 mm / s, and the third scan speed is 1000 to 1500 mm / s.

  In one embodiment, the identification symbol is a barcode.

  In a certain embodiment, the side part of the said identification symbol pattern is scraped off by irradiating the said black / white inverted pattern with a laser.

  In one embodiment of the drill with the identification symbol of the present invention, the surface of the drill is laser-irradiated at a first scan speed to perform a base treatment of the identification symbol pattern, A step of printing an identification symbol pattern by irradiating a laser at a second scan speed lower than the first scan speed, and a laser at a third scan speed higher than the second scan speed for a pattern obtained by reversing black and white with respect to the identification symbol pattern It is obtained by including the step of irradiating and processing the end of the identification symbol.

  In one embodiment, the first scan speed is 500 to 1200 mm / s, the second scan speed is 40 to 150 mm / s, and the third scan speed is 1000 to 1500 mm / s.

  In one embodiment, the identification symbol is a barcode.

  In a certain embodiment, the said identification symbol is a barcode, and the longitudinal direction of the said barcode is formed along the axial direction of the said drill.

  In a certain embodiment, the width | variety of the said identification symbol is narrow compared with the identification symbol pattern obtained by the said printing process.

  According to the method for providing an identification symbol for a drill of the present invention, since the ground treatment is performed by laser irradiation in advance, a clear identification symbol can be obtained when printing. Furthermore, by irradiating the printed pattern with a black / white inverted pattern onto the printed identification symbol, the edge of the identification symbol that tends to become unclear is scraped off, so that a clearer identification symbol can be provided. Furthermore, since the width of the end portion can be reduced as compared with the conventional identification symbol, the identification symbol itself can be displayed smaller. Therefore, a clear identification symbol can be provided even in a space where it has been difficult to provide an identification symbol.

It is a side view which shows an example of the drill which is one Embodiment of this invention. It is process drawing explaining the identification symbol provision method of the drill by one Embodiment of this invention, (a) is a schematic diagram which shows a base treatment process, (b) is sectional drawing in the AA of (a). (C) is a schematic diagram showing a printing process, (d) is a cross-sectional view taken along line BB in (b), (e) is a schematic diagram showing an edge processing process, and (F) is sectional drawing in the CC line of (e).

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

<Drill>
The drill used for this invention should just be a drill normally used by those skilled in the art, and is not specifically limited. Various drills such as a single blade drill or a drill having a plurality of blades can be used. FIG. 1 shows an example of a drill used in this embodiment. The drill 1 has a substantially cylindrical shape centered on an axis O, and includes a cutting portion 10 that comes into contact with a work material and a shank portion 20 that is gripped by a rotating shaft of a machine tool.

  Two cutting edges 11 are formed at the tip of the cutting part 10, and two twisted grooves 12 are formed along the axis O on the outer peripheral surface. That is, a double-edged drill. Between these twisted grooves 12, a land portion is disposed substantially from the front end portion to the rear end portion.

  Two cutting blades 11 are formed at the tip of the cutting part 10 as described above, and are generally formed so as to be 180 ° rotationally symmetric with respect to the axis O.

  The torsional grooves 12 are intended to discharge chips generated from the cutting edge, and are formed on the outer peripheral surface corresponding to each cutting edge 11. These twisted grooves 12 are set to 30 ° or more, for example.

  An identification symbol 13 is further given to the shank portion 20. In the present embodiment, a bar code is used as the identification symbol 13, but any barcode that can be identified may be used. For example, various identification symbols such as a matrix code and a QR code can be used.

  The shape of the identification symbol 13 is not particularly limited. In this embodiment, a long bar code is used as shown in FIG. 1. In such a case, from the viewpoint of facilitating reading of the identification symbol, the longitudinal direction of the identification symbol is a drill. It is preferable to provide it along the axial direction.

  In the present embodiment, the identification symbol 13 is located at the rear end portion of the shank portion 20, but may be a tip portion, and the arrangement is not particularly limited. It can be suitably given to a place that does not interfere with the function of the drill. In the present embodiment, the identification symbol 13 is provided on the curved surface. For example, from the viewpoint of easy reading of the identification symbol, a flat cut surface is provided on the curved surface of the shank portion. An identification symbol may be given in the cut surface. When an identification display is given to a flat surface such as a cut surface, it is difficult to be affected by a surface such as a curvature, so that a more accurate identification display can be read. Further, when the drill material is made of a brittle material such as a cemented carbide, the drill may cause brittle fracture by laser irradiation when the method of the present embodiment described later is used. In such a case, a dedicated metal fitting made of a metal material such as a steel material may be separately prepared, an identification symbol is given to the special metal fitting, and the special metal fitting to which the identification symbol is given may be joined to the drill body. . As a joining method, for example, a method commonly used by those skilled in the art, such as brazing, is employed. In addition, when using such a special metal fitting, it cannot be overemphasized that either the process of joining to the drill surface and the process of providing an identification symbol may be first.

<Identification method>
FIG. 2 shows an embodiment of a method for providing an identification symbol for a drill according to the present invention. In FIGS. 2C and 2E, reference numerals 11a and 11b denote laser irradiation patterns.

  First, as shown in FIG. 2 (a), the surface of the drill is irradiated with a laser at a first scan speed to perform a base treatment of an identification symbol pattern. This ground treatment step is performed for the purpose of cleaning the surface such as removing dust adhering to the surface of the drill that becomes the base (surface of the portion to be printed) and for the purpose of providing irregularities on the surface. By providing irregularities on the surface in this manner, for example, the metal surface is irregularly reflected, the contrast between the black portion identification display and the white portion space can be made clearer, and the identification symbol can be easily read. be able to. By performing the ground treatment, it is possible to clearly print the identification symbol in the subsequent printing process.

  This ground treatment is performed on the surface of a region slightly larger than this imparted portion so as to surround the imparted portion of the identification symbol.

  The base treatment is performed by irradiating the surface of the base with laser at a relatively fast scan speed (referred to as a first scan speed for convenience). Specifically, the first scan speed is, for example, about 500 to 1200 mm / s. The laser frequency is about 20 to 40 kHz.

  When the above-described ground treatment process is performed, for example, as shown in FIG. 2B, a satin-like region is obtained on the drill surface. The height L1 of the printed portion is about 0.1 to 0.3 μm.

  Next, as shown in FIG. 2C, an identification symbol pattern is printed by irradiating the ground drill surface with a laser at a second scan speed lower than the first scan speed. The second scan speed is, for example, about 1/3 to 1/30 times the first scan speed in order to perform clear printing. Specifically, it is about 40 to 150 mm / s. Further, the frequency of the laser to be irradiated is preferably smaller than the frequency used in the ground treatment. As the frequency of the laser, for example, it is appropriately used within a range of 1 to 10 kHz.

  When the above printing process is performed, for example, as shown in FIG. 2D, a printed portion having a height higher than the surface irregularities obtained by the base treatment is obtained on the drill surface. The height L2 of the print portion is, for example, about 0.5 to 1.5 μm.

  In the present embodiment, as shown in FIG. 2 (e), a pattern obtained by reversing the identification symbol pattern in black and white is irradiated with a laser at a third scan speed higher than the second scan speed, thereby Process the edge. This end processing is performed to remove the end portion of the identification symbol which is thin and easily smeared from the printed portion provided on the drill surface obtained in the printing processing step, and exposes the metal surface of the drill. Is called. A sharper identification symbol can be obtained by the edge processing. Furthermore, since the width of the end portion can be reduced as compared with the conventional identification symbol, the identification symbol itself can be displayed smaller.

  In the end processing, the end of the identification symbol is scraped off, and laser irradiation conditions that do not print on the metal portion of the drill may be selected. Specifically, the third scan speed is set higher than the second scan speed, and is, for example, about 1000 to 1500 mm / s. The scan speed is preferably large in the above range. The frequency of the irradiated laser is about 30 kHz.

  In the present embodiment, by performing the edge processing, for example, the width W1 of the print portion obtained by the printing process shown in FIG. 2D is reduced to the width W2 as shown in FIG. The difference between the widths W1 and W2 is substantially about 10 to 30 μm.

  Thus, the identification symbol given to the drill surface is clear and can be easily read by a detection device such as a reader. For example, traceability management can be easily performed by inputting various kinds of information such as a manufacturing date, a serial number, and the number of regrindings to the identification symbol. It is also possible to input information such as inventory status, number of drills used, and worker name. Furthermore, it is possible to provide an identification symbol having a smaller end portion width than a conventional identification symbol. Therefore, a clear identification symbol can be provided even in a space where it has been difficult to provide an identification symbol.

  As mentioned above, although embodiment of this invention was illustrated, this invention is not limited to embodiment, It cannot be overemphasized that it can be made arbitrary, unless it deviates from the objective of invention.

DESCRIPTION OF SYMBOLS 1 Drill 10 Cutting part 11 Cutting blade 12 Torsion groove 13 Identification symbol 20 Shank part

Claims (9)

A step of performing a ground treatment of the identification symbol pattern by irradiating the surface of the drill with a laser at a first scanning speed;
A step of printing an identification symbol pattern by irradiating the surface of the drill with a laser beam at a second scan speed lower than the first scan speed; A method for providing an identification symbol for a drill, comprising a step of processing an end portion of an identification symbol by laser irradiation at a third scanning speed higher than the scanning speed.   The drill according to claim 1, wherein the first scan speed is 500 to 1200 mm / s, the second scan speed is 40 to 150 mm / s, and the third scan speed is 1000 to 1500 mm / s. Identification symbol assignment method.   The drill identification symbol assigning method according to claim 1 or 2, wherein the identification symbol is a bar code.   The drill identification symbol imparting method according to any one of claims 1 to 3, wherein a side portion of the identification symbol pattern is scraped off by irradiating the black and white inverted pattern with a laser. A step of performing a ground treatment of the identification symbol pattern by irradiating the surface of the drill with a laser at a first scanning speed;
A step of printing an identification symbol pattern by irradiating the surface of the drill with a laser beam at a second scan speed lower than the first scan speed; A drill with an identification symbol obtained by including a step of processing an end portion of the identification symbol by laser irradiation at a third scanning speed higher than the scanning speed.   The identification symbol according to claim 5, wherein the first scan speed is 500 to 1200 mm / s, the second scan speed is 40 to 150 mm / s, and the third scan speed is 1000 to 1500 mm / s. Drills marked with   The drill with the identification symbol according to claim 5 or 6, wherein the identification symbol is a bar code.   The drill with the identification symbol according to claim 7, wherein the identification symbol is a barcode, and a longitudinal direction of the barcode is formed along an axial direction of the drill.   The drill with the identification symbol according to claim 7 or 8, wherein a width of the identification symbol is narrower than an identification symbol pattern obtained by the printing process.

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