JPH0934975A - Identification method for parts and marking structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the burden of a worker and to make a read error hardly occur by embedding magnetic bodies in plural recessed parts provided on the surfaces of parts consisting of non-magnetic materials and drawing magnetic information. SOLUTION: Magnetic information 4 is drawn on the shoulder part of a boss part 3 in the center of a disk 1 consisting of the non-magnetic materials with heat resistance such as the alloy of titanium and nickel. Magnetic information 4 is constituted by embedding the magnetic bodies 6 in the plural recessed parts 5 (5a and 5b). A magnetic scanner 8 executes scanning by making it face a part where magnetic information 4, is drawn or by setting the scanner in parallel to the part when it is more than prescribed length. Thus, a case when an information display magnetic element 4B is on the left of a base magnetic element 4A is judged to be '1', and a case when the information display magnetic element 4B is on the right of the base magnetic element 4A to be $0'. Thus, magnetic information 4 drawn with the binary system as a base can be read.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of identifying a part used under high temperature and high stress conditions such as a disk of a gas turbine or a steam turbine, and a marking structure for the part.

[0002]

2. Description of the Related Art Disks and blades of, for example, gas turbines used in jet engines for aircraft are controlled in total use time and total flight time in order to be used within an appropriate life span. In this case, in order to identify each part, it is necessary to give a part number and an individual number to those parts.

[0003]

However, since the gas turbine of an aircraft jet engine is used under conditions of high temperature and high stress, marking with paint cannot be used because it may disappear on the way. ,
Therefore, of course, bar codes and the like cannot be adopted. For this reason, conventionally, when giving a solid number or the like to each of these parts, it is the actual situation that the characters or numbers are directly displayed using a technique such as engraving, etching, or embossed characters.

By the way, with such a display method,
In identifying the parts, it is premised that the worker once visually reads and judges, and the burden on the worker increases and a reading error may occur. In particular, if the dirt is severe or foreign matter is attached, the reading error becomes larger.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a part identification method and a part marking structure in which the burden on the operator is small and reading errors are less likely to occur. .

[0006]

In order to achieve the above object, a method of identifying a component according to a first aspect of the present invention is such that a magnetic material is embedded in each of a plurality of recesses formed on the surface of the component made of a non-magnetic material. The magnetic information is drawn by using a magnetic scanner, and the drawn magnetic information is read by a magnetic scanner to identify the component.

The method of identifying parts according to claim 2 is characterized in that the magnetic information is composed of a combination of two types of magnetic elements.

According to a third aspect of the present invention, there is provided a method of identifying a component, the method according to the second aspect.
The type of magnetic element is composed of a combination of a base magnetic element for determining a position serving as a base and an information display magnetic element for displaying information by being arranged on either the left side or the right side of the base magnetic element. It is characterized by being

According to a fourth aspect of the present invention, there is provided a method of identifying a part, wherein the part to be identified is a disk of a gas turbine or a steam turbine.

The marking structure for parts according to claim 5 is
It is characterized in that a magnetic body is embedded in each of a plurality of recesses formed on the surface of a component made of a non-magnetic material to draw magnetic information.

The marking structure for parts according to claim 6 is
It is characterized in that the bottom of the recess is formed in a circular cross section.

The marking structure for a component according to claim 7 is:
The magnetic information is composed of a combination of two types of magnetic elements.

The marking structure for parts according to claim 8 is:
The two types of magnetic elements are configured by a combination of a base magnetic element for determining a position serving as a base and an information display magnetic element that represents information by being arranged on either the left or right side of the base magnetic element. It is characterized by

<Operation> In the present invention, magnetic information is drawn by embedding a magnetic material in each of a plurality of depressions provided on the surface of a part made of a non-magnetic material, and the drawn magnetic information is read by a magnetic scanner. Since the parts are identified by the information, it is not affected even when the part where the information is drawn is dirty or foreign matter adheres, or when the base material forming the parts changes color due to temperature It is possible to identify parts with less number of parts.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 indicates a disk of a gas turbine used in an aircraft jet engine. The disk 1 is made of a heat-resistant non-magnetic material such as an alloy of titanium and nickel, and is provided on the outer periphery thereof. The base ends of the blades are inserted into and fixed to the grooves 2 ,.

Magnetic information 4 is drawn on the shoulder portion of the central boss portion 3 of the disk 1. As shown in FIG. 2, the magnetic information 4 is configured by embedding the magnetic body 6 in each of the plurality of depressions 5 (5a, 5b). Also, magnetic information 4
Is composed of a combination of two types of magnetic elements 4A and 4B.

Specifically, information is displayed by arranging a large-diameter approximately circular base magnetic element 4A for determining a position serving as a base and one of the base magnetic element 4A on either side of the base magnetic element 4A. It is composed of a combination of small-diameter and substantially circular information display magnetic elements 4B. The base magnetic element 4A has a reference line L
Are provided at predetermined intervals. The information display magnetic element 4B is arranged on the right side or the left side of the base magnetic element 4A at regular intervals, respectively.

Next, a method of manufacturing the magnetic elements 4A and 4B will be described. First, as shown in FIG.
The depression 5 is formed by the punch 10 at a predetermined position of the disk 1. At this time, the recesses 5 are formed in two types, a large diameter substantially circular shape and a small diameter substantially circular shape, corresponding to the two types of the base magnetic element 4A and the information display magnetic element 4B. Further, the bottom of the recess 5 is formed in a circular cross section so that no corner is formed. Next, for example, the magnetic material 6 is coated in the vicinity including the portion where the depression 5 is formed by plasma spraying. Further, the surface of a predetermined portion of the disk 1 is ground or polished, and the magnetic material 6 embedded in the recess 5 is left, and the magnetic material 6 attached to the surface of another portion is removed. By the above-mentioned work, the disk 1 in which the magnetic information 4 is drawn on the shoulder portion of the boss portion 3 as shown in FIG. 1 or 2 is obtained.

Next, a method of reading the magnetic information 4 having the above structure will be described. As shown in FIG. 3, the magnetic scanner 8 is caused to face the portion of the disk 1 where the magnetic information 4 is drawn, or if it is longer than a predetermined length, scan it. Thereby, for example, when the information display magnetic element 4B is on the left side of the base magnetic element 4A, "1" is determined, and when the information display magnetic element 4B is on the right side of the base magnetic element 4A, "0" is determined. The magnetic information 4 drawn based on the binary system can be read.

Needless to say, the present invention is not limited to the disk of the gas turbine, and the present invention can be applied to the disk of the blade, the disk of the steam turbine, the blade, or the like.

[0021]

According to the first aspect of the present invention, magnetic information is drawn by embedding a magnetic material in each of a plurality of recesses formed on the surface of a component made of a non-magnetic material, and the drawn magnetic information is drawn. Since it is used to identify the parts by reading with a magnetic scanner, it is also affected when the part where the information is drawn becomes dirty or foreign matter adheres, or when the base material forming the parts changes color due to temperature. In addition, the parts can be identified without receiving the visual judgment of the operator, and at the same time, the reading error is reduced. In addition, automation can be achieved without difficulty. In addition, the magnetic marking can make the depth of the depression for manufacturing the marking smaller than that when visually confirming, and the stress concentration can be reduced accordingly.

According to the second aspect of the present invention, the magnetic information is composed of a combination of two types of magnetic elements and can be displayed in an extremely simplified state, so that the reading error can be further reduced.

According to the third aspect of the invention, the two types of magnetic elements are arranged on the base magnetic element for determining a position serving as a base and on either the left or right side of the base magnetic element. Since it is composed of a combination of information display magnetic elements that display information, the manufacturing cost of magnetic elements can be increased because the tolerance of the variation in the position or size of the indentations when manufacturing individual magnetic elements can be widened. Can be lowered.

According to the sixth aspect of the invention, since the bottom of the recess is formed in a circular cross section, the stress concentration generated in the recess can be further reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a disk of a gas turbine showing an embodiment of the present invention.

FIG. 2 is a perspective view showing a structure of magnetic information drawn on the disc.

FIG. 3 is a perspective view showing a method of reading magnetic information.

FIG. 4 is a process diagram showing a method for producing magnetic information.

[Explanation of symbols]

 1 Disk 4 Magnetic Information 4A Base Magnetic Element 4B Information Display Magnetic Element 5 Recess 8 Magnetic Scanner 10 Punch

Claims (8)

[Claims] 1. A magnetic body (6) is provided in each of a plurality of depressions (5) formed on the surface of a component (1) made of a non-magnetic material.
Embedded therein, magnetic information (4) is drawn, and the drawn magnetic information is read by a magnetic scanner (8) to identify the part. 2. The method of identifying a component according to claim 1, wherein the magnetic information is composed of a combination of two types of magnetic elements (4A, 4B). 3. The component identification method according to claim 2, wherein the two types of magnetic elements are a base magnetic element (4A) for determining a position serving as a base, and either of the left and right sides of the base magnetic element. A method for identifying a part, characterized in that the part is constituted by a combination of information display magnetic elements (4B) which are arranged on one side to display information. 4. The method for identifying parts according to claim 2, wherein the part to be identified is a disk of a gas turbine or a steam turbine. 5. A marking structure for a component, wherein magnetic information is drawn by embedding a magnetic material in each of a plurality of recesses formed on the surface of the component made of a non-magnetic material. 6. The marking structure for a component according to claim 5, wherein the bottom of the recess is formed in a circular cross section. 7. The component marking structure according to claim 5, wherein the magnetic information is composed of a combination of two types of magnetic elements. 8. The component marking structure according to claim 7, wherein the two types of magnetic elements are arranged on a base magnetic element for determining a position serving as a base, and on either the left side or the right side of the base magnetic element. A marking structure for parts, which is configured by a combination of information display magnetic elements that represent information by being processed.