RU2397845C2 - Method of adding extra process data into identification non-reproducible mark - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to identification of materials and can be used for marking electrically conducting parts, for example rolled stock, automotive assembly units and parts, machine building products etc. Proposed method comprises splitting identification mark into two parts, applying non-reproducible image made up of electric-discharge spots on the first part containing identification number, splitting said second part into several sections depending upon the number of process jobs the part is subjected to. When the machined part passed next machining job, second part of identification mark is filled, that is, extra identification number is stamped and non-reproducible image made up of electric-discharge spots is applied thereon. Note here that the remaining area of identification part is covered by dielectric mask-patch for temporary protection.

EFFECT: producing non-reproducible identification mark describing entire technological process, higher quality and reliability of machining.

2 dwg, 1 ex

Description

The invention relates to the field of identification of material resources and can be used for marking electrically conductive parts, for example, rental products, vehicle parts, engineering products, aircraft manufacturing, etc.

Known methods of irreproducible identification [1-2], based on the use of natural encryption processes (electric discharge, turbulent stream, etc.). These methods allow you to uniquely associate the item with a digital code and an irreproducible picture on the label.

However, in production, often the workpiece, especially metal, undergoes many technological operations (annealing, hardening, hardening, applying the selected surface roughness, etc.), which do not affect the condition of the mark, which reduces technological discipline in the production.

A method is proposed for introducing additional technological information into an identification tag created by non-reproducible methods.

The feature of the proposed method is that the surface of the identification mark is divided into two parts, one part containing the identification number is applied, an unchanged part of the irreproducible picture is applied, and the second part, forming a materially inseparable unity with the first part, is divided into several sections in accordance with the number the technological processes that the identifiable part must go through, the unchanged part of the irreproducible picture is covered with a dielectric patch-patch, equipped with m from the side facing the mark with a reusable adhesive coating, and each section of the variable part of the irreproducible picture is filled after passing through the identifiable part of the next technological process.

Figure 1 shows the identification mark 1, the surface of which is divided into two parts 2 and 3. The unchangeable part 2 of the mark 1 contains identification number 4 and irreproducible picture 5 of randomly scattered electric discharge spots. Variable part 3 of label 1 is divided into several sections, for example, sections 6, 7 and 8 (the partition depends on the number of technological operations to which the workpiece must be subjected).

On each site, an additional identification number 9 can be knocked out by a needle-hammer installation, in which any information can be stored, for example, the first two digits are the shop number, the next two digits are the number of the team that carried out the technological operation, the next two digits are the person responsible for normative control etc. The digital code, in addition to the needle settings, can be applied by an engraving machine with software. After applying the digital code, the selected area of the label is protected by an irreproducible picture consisting of a set of electric discharge spots. The inclusion of electric discharge spots on a digital code is desirable, since it increases the information security of the digital code.

The sections of the second part of the label are filled with a digital code confirming that the selected technological process was performed by a team such-and-such, the team leader was such-and-such, the temperature regime during hardening was such-and-such, the holding time of the process was such-and-such, etc. And this digital code is impossible to fake, because it is entered into the database again with a set of irreproducible identification spots.

To avoid counterfeiting, the digital code is also protected by an irreproducible picture of 5 electric discharge spots on both the first and second parts of the mark. A non-reproducible picture, in addition to the electric-discharge method, can be applied in any other way that provides an irreproducible effect. In order to avoid introducing information distortions during the processing of a particular site, the entire remaining surface of the identification mark 1 is temporarily protected by a dielectric stencil-plaster 10, which is individual for each technological operation.

As you progress through the entire technological cycle, each workpiece contains the entire technological map, which helps to raise the technological discipline in production.

An example of the method

The blade of a high-speed turbine is selected as an identifiable part. The identification mark is implemented directly on the shoulder blade, for which the identifiable part of the mark is divided into two parts. Of the total number of technological processes that a turbine blade is subjected to during manufacture, three most important processes are identified. In this regard, the second part of the identification tag is divided into 3 sections. The total size of the identified area covers an area of 6 cm ² . The size of the areas responsible for technological operations is 0.75 cm ² .

The identification mark is broken up on a machine with software control, the application of digital codes is implemented on an engraving machine. The application of electric discharge spots is carried out after applying digital codes using an electrospark installation or using a high voltage current source and a high voltage capacitor. In the latter case, the implementation of electric discharge spots is carried out with characteristic gaps of 10–20 mm and a voltage at the tip-shaped high-voltage electrode of 15–22 kV. With the known capacitance of high-voltage capacitors, the discharge energy is estimated in the range from 1 to 8 J. A dielectric patch-patch for temporary protection is installed only when applying electric discharge spots in a selected area. When undergoing a technological operation, especially high-temperature, the stencil is removed. To apply electric discharge spots on each of the sections of the second part of the mark, a stencil is used with its individual dimensions, leaving only those areas on the mark where an irreproducible picture should be applied. After that, the entire identifiable area is scanned and entered into the database.

Identification is carried out with the following sequence. Using the digital code on the first part of the tag, the corresponding tag is found in the database. By comparing an irreproducible picture of electric discharge spots at an object with a similar one in the database for this object, we are convinced that we are not dealing with counterfeit goods, but with an object produced at a specific enterprise, which at one time reported to the state its volume of officially released products. In the event that the cause of the accident was precisely this part and the reason was found, for example, the part did not fully harden, the digital code responsible for hardening this part is responsible for the violation of the process.

This method of entering information can be used in particularly important industries, for example, in the assembly of rocket engines, in the assembly of high-speed turbines (marking turbine blades), in the assembly of high-pressure circuits of industrial nuclear reactors and chemical reactors for special purposes, as well as small arms. The likelihood of a repeat of a set of electric discharge spots in a 1 cm ^{2 area} is estimated at 10 ^-400 , which is little distinguishable from infinity. This allows you to create automated control systems that can distinguish counterfeit products from legal ones. Moreover, this approach will reliably find the causes of technological defects and improve the quality and reliability of manufactured products of special importance.

Information sources

1. A positive decision on the application of the Republic of Moldova “Method for the identification of material resources” No. 20040049 from 2004.02.27.

2. A positive decision on the application of the Republic of Moldova “Method for the identification of solid material resources” No. 20040050 from 2004.02.27.

Claims (1)

A method of applying an irreproducible identification tag to an electrically conductive part with an identification tag containing an identification number when passing through a workpiece being processed by a process part, including splitting the identification tag into two parts, applying an irreproducible picture from electric discharge spots to the first part containing the identification number, splitting the second part into several sections depending on the number of technological operations to which the part is subjected, and after by the detail of the next technological operation, filling in the area of the second part of the identification mark, on which an additional identification number is knocked out and an irreproducible picture is applied from the electric discharge spots, while all other parts of the identification mark are covered with a dielectric stencil-plaster for temporary protection.

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