JP2004334890A - Quality control method for machine element article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily control detail history information ranging over material purchase for each element component to an inspection content after completion of the element component, at one-to-one relation to each article or a lot-by-lot. <P>SOLUTION: The article 1 of a control object is an assembly of the plurality kinds of element components 2 ((1)-(3)). The plurality kinds of element components 2 ((1)-(3)) is manufactured through the material purchase S1, a forging process S2, a heat-treating process S3 and a grinding process S4. The information in each of the processes S1-S4 is recorded in an IC tag 4 together with the lot number of the process. After the element components 2 are assembled into the article 1, the recorded information in the IC tag 4 for the each element component 2 is recorded in a control computer system 10 to correspond to a production number or a production lot number. Another tag 9 is attached to the article 1 to record a production number or a lot number thereof. Working condition information in the respective processes of the forging, heat-treating and grinding processes are also recorded in the IC tag 9. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

The present invention, have use the IC tag, the machine element product comprising a plurality of elements available, for example, rolling rising bearing, shaft coupling, such as a ball screw, machine element product traceability comprising a plurality of elements article has a rolling element on quality management method made it possible to.

In recent years, there has been an increasing demand for traceability, that is, the ability to track the history, application, or location of what is being considered. In the quality control of machine element products, the quality of each manufacturing process (material purchase, forging process, heat treatment process, grinding process, etc.) from material purchase to completion of production, production history such as lots, etc., is one-to-one with each machine element product. , Or lots. For example, special products such as aircraft bearings are individually inspected, and it is required that the manufacturing history be understood on a one-to-one basis. In the case of general products such as bearings for automobiles and industrial machines, lot management is performed, and sampling inspection and the like are performed in lot units. Therefore, a manufacturing history is required in lot units. By knowing the manufacturing history, it is easy to take measures such as replacement, identification of the range of defective products, future improvement, etc., when a defective product occurs, and it is also easy to carry out life diagnosis and prior replacement that leads to mechanical failure. Also, it becomes easy to determine the mixing of similar products.
Conventionally, as a quality control method for clarifying such a manufacturing history, information generated for each process has been dealt with by filling in a slip or inputting a database to a terminal.

On the other hand, IC tags are being used in physical distribution management and inventory management, and in manufacturing articles such as automobiles, management from manufacturing to disposal using IC tags has been proposed (for example, Patent Document 1). Since IC tags can record and read information without contact and have a large storage capacity, they are expected to be highly managed.
JP-A-2002-169858

  In a conventional example of a quality control method using an IC tag, various kinds of information on a machine element product are directly recorded on an IC tag attached to the machine element product, or identification information is recorded on the IC tag. Then, by collating with the database, the material of the machine element product, lot management information, various history data, and the like can be understood. However, there is a case where the cause of the trouble occurring in the machine element product cannot be clarified only by the information on the machine element product. For example, a difference may occur in quality due to a difference in processing conditions in each process, and such a difference due to a difference in processing conditions may not be recognized from an inspection result. Machine element products such as rolling bearings, shaft couplings, and ball screws are composed of multiple element products.Even if inspection results of the machine element products themselves after assembly are known, differences in the quality of individual element products Unable to identify the problem. In particular, in the case of a machine element product having a rolling element such as the above-mentioned rolling bearing, a slight difference in material and accuracy causes a large difference in performance as a machine element product. It is difficult to respond.

Also, in the process management, in the conventional management method of performing slip entry and terminal input for each process, it takes time and effort to enter and input, so it is difficult to record a large amount of information in detail. In particular, mechanical element products, such as rolling bearings, which are assembled from a plurality of element products, and each element product is manufactured in lots for each process through the forging process, heat treatment process, and grinding process from material purchase. In such a case, management in the manufacturing process of each element is complicated, and it takes time to record and input information by hand. For this reason, it is difficult to sufficiently respond to a request for detailed history information of a machine element product, and management is costly.
For this reason, application of an IC tag has been considered, but management such as an article such as an automobile cannot be applied to the machine element products as described above. In the proposal example of Patent Document 1, an IC tag is attached to an automobile which is an article to be managed, and information of each process is recorded. The IC tag is attached to a frame or the like. However, in the case of mechanical element products such as rolling bearings, there are no completed standard element products such as frames for automobiles, and in the manufacturing process, each element product is manufactured through forging, heat treatment, etc. IC tag cannot be attached to the device. In addition, in the case of machine element products such as rolling bearings, the inner ring, outer ring, rolling elements, etc. are managed through material purchase, forging process, heat treatment process, grinding process, etc., so we tried to apply IC tags to quality control. In this case, how to use the IC tag is a problem, and it is difficult to apply an IC tag efficiently.

An object of the present invention is to enhance the traceability of a machine element product composed of a plurality of element products, and to easily confirm information in a manufacturing process even after shipping or delivery to a customer. To provide a quality control method.
Another purpose is of the present invention, the machine element product comprising a rolling have bodies plurality of elements goods, increase the degree of traceability, forging, turning process, heat treatment process, confirmation of processing condition information such as grinding step, An object of the present invention is to provide a quality control method for machine element products that can be easily confirmed even after shipment or delivery to a customer.

The quality control method for machine element products according to the present invention is a method in which an IC tag is attached to a machine element product, and traceability relating to quality control is enabled only from information recorded on the IC tag. That is, this management method uses a non-contact IC tag capable of recording and reading information for a machine element product composed of a plurality of component products, and records and manages predetermined information related to the machine element product. A quality control method, comprising: attaching an IC tag to a machine element product to any one of the plurality of component products of the machine element product; and attaching the IC tag to the machine element product to the machine element product. And a process of reading information recorded on the IC tag and confirming predetermined information from the read information at any time after shipment.

More specifically, the quality control method for machine element products of the present invention may be the following method. In other words, this management method uses a non-contact IC tag capable of recording and reading information on a machine element product comprising rolling elements and a plurality of element products, from purchasing materials related to the machine element product to forging and forging. at least one of the steps of turning, thermal treatment step, a respective manufacturing process, as well as mechanical element method for controlling quality product for managing machine element product by recording predetermined manufacturing information leading to the inspection of such extent grinding Engineering, The process of attaching an IC tag to one of a plurality of component elements of the machine element product at the time of manufacture or completion of the machine element product, and the process of attaching the IC tag attached to the machine element product to the time of shipment or customer delivery Record at least one of processing condition information and material information in at least one of a forging process, a heat treatment process, and a grinding process for the machine element product. Comprising the steps, during any after the shipment, from the read information by reading the recorded information of the IC tag, and information read utilizing the process of performing at least one of confirmation of the processing condition information and material information.
According to this method, it is possible to confirm any processing condition information or material information such as at least one of forging and turning processes , a heat treatment process, a grinding process, etc. in the information reading and utilizing process at any time after the shipment. it can. Because it is possible to check processing condition information, etc., it is easy to clarify the cause when a defect occurs in a machine element product that requires strict quality and accuracy, such as a machine element product that has rolling elements and consists of multiple element products. Can be done. In this method, since information can be managed only by the IC tag without using a separate database, regardless of whether or not the facility for checking the processing condition information and the like has communication facilities and access authority to the database. The processing condition information and the like can be read. In this specification, the “machine element product” is, for example, a machine element such as a machine part, which is subject to a commercial transaction by itself.

Quality control method smell of the inventions of the machine element product Te, may be included in the following process. That is, a process of recording predetermined manufacturing information from the material purchase of the element product of the machine element product to each manufacturing process in an IC tag for a manufacturing process prepared for each lot number of the element product for each process, and a step of recording a part or all of the read information by reading the information recorded on the IC tag attached to the machine element product, a manufacturing information to be recorded in the IC tag for the above production process, the respective The method includes at least one of processing condition information and material information in at least one of the manufacturing steps .
As described above, in the manufacturing process for each element product, the manufacturing information from the material purchase to each manufacturing process and the grinding process is stored in the IC tag for the manufacturing process for the manufacturing process prepared for each lot number of the element product. When the information is recorded on the IC tag for each process, more detailed information can be recorded than when the information is recorded on a handwritten slip. For example, unlike the case where the information is input from a terminal to a database, the place where the information should be input is an IC. Since the tag is used, it can be visually recognized, the input operation becomes clear, and errors hardly occur. In addition, unlike information that records all miscellaneous information from the purchase of elemental materials to each step of the grinding process in a database, these recorded information are stored in an IC tag, so the load on the database is light and management is easy. It will be easier. Therefore, more detailed information can be easily managed. When the lot classification changes for each process, the IC tag prepared for each lot number of the element product is prepared for each lot that changes.

The recording of the manufacturing information at the time of manufacturing the component product may be performed in a database. Sunawa Chi, step each manufacturing from above SL material purchase of the machine element product of said element parts, and a predetermined manufacturing information throughout the examination, the element parts in the database for the time of manufacture management lot number or element products unique identification number And recording the recorded information on an IC tag attached to the machine element product.

In the present invention, the machine element product includes at least one of forging and turning processes from material purchase, a heat treatment process, and an element product different from an element product manufactured through a grinding process, The information on the separate element product may be recorded in the database after assembling the machine element product in association with the production number or the lot number. Thus, information on the different element products can be known after the completion of the machine element product.

The machine element product may be any one that can be assembled including a plurality of types of element products manufactured through the respective manufacturing steps, and includes, for example, a rolling bearing, a constant velocity joint, other shaft joints, and a ball screw.
In the case of a rolling bearing, the element products manufactured through at least one of the steps of forging and turning , heat treatment, and grinding from the purchase of the material are an inner ring, an outer ring, and a rolling element. Other components that do not go through these steps include retainers and seals.

The machine element product may be filled with grease at the time of assembly. In this case, it is preferable to record the date of assembly of the machine element product on an IC tag attached to the machine element product. Rolling bearings, constant velocity joints and other shaft couplings, ball screws, and the like correspond to the machine element products to be filled with grease.
Since grease deteriorates with time, management becomes easier if the date of assembly is known.

  In the present invention, information such as the location from shipment of the machine element product to delivery to the customer may be recorded in the IC tag attached to the machine element product. This facilitates shipping management, distribution management, customer management, maintenance management, and the like.

The first quality control method for machine element products according to the present invention records predetermined information on machine element products by using an IC tag capable of recording and reading information in a non-contact manner for a machine element product comprising a plurality of element products. A quality control method for a machine element product, comprising: attaching an IC tag to the machine element product to any one of the plurality of component products of the machine element product; and attaching the IC tag to the machine element product. A process of recording information in the manufacturing process of the machine element product on the IC tag, and a process of reading the recorded information of the IC tag and confirming predetermined information based on the read information at any time after shipment. Therefore, for machine element products consisting of multiple element products, the degree of traceability is enhanced, and confirmation of information in the manufacturing process is issued. It can be confirmed easily even after the after and customer delivery.
According to another aspect of the present invention, there is provided a quality control method for a machine element product, wherein an IC tag attached to the machine element product has at least one of processing condition information and material information in at least one of a forging process, a heat treatment process, and a grinding process. For machine element products that have rolling elements and consist of multiple element products, it is easy to check processing condition information such as forging, heat treatment, and grinding processes or material information even after delivery to customers. in can be confirmed, Ru can be easily performed defects cause elucidation of the time of occurrence.

A first embodiment of the present invention will be described with reference to FIG. FIG. 1 shows each stage of the flow from manufacture to disposal of the machine element product 1 and a quality control process using the IC tag 9 at each stage. The quality control method of the machine element product is performed by attaching an IC tag 9 to the machine element product 1 and performing a predetermined manufacturing process from the purchase of the material related to the machine element product 1 to the forging process, the heat treatment process, the grinding process, and the inspection. This is a method of recording information and enabling traceability related to quality control of the machine element product 1 from the recorded information read from the IC tag 9. The IC tag 9 can record and read information without contact. A machine element product 1 to be managed is configured by assembling a plurality of types of element products 2, and one of the element products 2 is a rolling element. Rolling bearings, constant velocity joints and other shaft couplings, ball screws, and the like correspond to such machine element products 1.
This quality control method for machine element products includes the following IC tag attaching process R1, manufacturing information recording process R2, and recording information reading and utilizing process R3.

(IC tag attachment process R1)
In this process, the IC tag 9 is attached to the machine element product 1 when the machine element product 1 is manufactured or when the manufacture is completed. In this case, the machine element product 1 may be assembled after attaching the IC tag 9 to one of the component products 2, or after the assembly of the machine element product 1 is completed, the IC tag 9 is attached to the machine element product 1. May be attached.

(Recording process R2 of manufacturing information)
In this process, the IC tag 9 attached to the machine element product 1 is provided with a forging process, a heat treatment process, a grinding process, and an inspection by the time of shipping or customer delivery, from the purchase of the material for the machine element product 1. Is recorded. The recorded manufacturing information includes processing condition information in at least one of the forging step, the heat treatment step, and the grinding step. The material purchase, forging step, heat treatment step, and grinding step for the machine element product 1 refer to the material purchase, forging step, heat treatment step, and grinding step for each element 2 of the machine element product 1. The processing condition information includes, for example, a pressing pressure and a cycle time in a forging process, a heat treatment temperature, a heat treatment time, a heat treatment method and the like in a heat treatment process, and a grinding wheel rotation speed, a cutting speed, a feed speed and the like in a grinding process. As the above manufacturing information, in addition to the processing conditions, at least one of the manufacturing date, manufacturing location, enclosed grease brand, clearance between element products, quality assurance period, and handling precautions for the machine element product It is preferable to record. It is also preferable to record various inspection results. The various inspection results include an inspection result for each element product 2 and an inspection result as a finished product. Further, it is preferable to record identification information of the machine element product 1 in addition to the manufacturing information. The identification information of the machine element product 1 may be identification information unique to each machine element product 1, for example, a serial number, or identification information for each lot of the machine element product 1, for example, a lot number. The recording of the manufacturing information may be performed at once, or may be performed in several times. For example, when the assembly of the machine element product 1 is completed and the completed product is inspected, information relating to the inspection result and inspection conditions may be recorded, and the remaining manufacturing information may be recorded later. All the manufacturing information, including that, may be recorded at once.

(Information reading use process R3)
In this process, at any time after shipment, the recorded information of the IC tag 9 is read, and at least the processing condition information is confirmed from the read information.
As shown in FIG. 1, the general flow from the completion of the machine element product 1 to the disposal is as follows: from the completion of the assembly of the machine element product 1, inspection of the finished product, shipping, storage in a warehouse, storage in a sales office, There is a flow of advance delivery (purchase by customer, incorporation of machine element product 1 into machine equipment), use by customer, and disposal. In the case of special order products, they may be delivered directly to customers after shipment.
The reading and use of the information recorded on the IC tag 9 is performed as necessary at an arbitrary stage after shipment, and necessary information is confirmed from the read information. For example, when a defect occurs in the machine element product 1 at the stage of use at the customer, various information such as the material and performance of the machine element product 1 is obtained from the IC tag 9 attached to the machine element product 1. Is read, and the cause is clarified. At this time, if the recording information includes not only the material and inspection result of each component 2 but also processing condition information, the cause can be easily and accurately identified.

  As an additional use in the information reading use process R3, the free space of the memory in the IC tag 9 attached to the machine element product 1 is appropriately used for shipping management, inventory management, distribution management, maintenance management, and the like.

  According to the quality control method for machine element products, in the information reading and using process R3 at any time after shipment, any processing condition information such as a forging process, a heat treatment process, and a grinding process can be confirmed. Even in the case of a mechanical element product 1 having a plurality of element products 2 having rolling elements 2A and requiring strict quality and accuracy, such as a rolling bearing, it is possible to easily perform the cause elucidation when a problem occurs. it can. In addition, in this method, since information can be managed only by the IC tag 9 without using a separate database, the facility that checks the processing condition information determines whether or not communication facilities and access authority to the database exist. Regardless, the processing condition information can be read.

The above embodiment is allowed to record the production information as possible to the IC tag 9 is a method of performing quality control by the record information, but it may also be used in combination with the database 10.
That is, the database 10 stores predetermined manufacturing information from the material purchase for the machine element product 1 to the forging process, the heat treatment process, the grinding process, and the inspection in association with the identification information of the machine element product 1, and stores the stored content as described above. Prepare what can be extracted by the identification information. Quality control is performed using the database 10 and the IC tag 9 attached to the machine element product 1. In this case, the following processes are performed in each of the processes R1 to R3.

(IC tag attachment process R1)
This process R1 is the same as in the above embodiment.
(Recording process R2 of manufacturing information)
In this process, identification information such as a production number or a lot number of the machine element product 1 is stored in the IC tag 9 attached to the machine element product 1 according to the database 10 before shipping or delivery to a customer according to the database 10. And manufacturing information on the machine element product 1 is recorded. The recorded manufacturing information includes processing condition information in at least one of a forging process, a heat treatment process, and a grinding process of each element product 2. Since the database 10 is used in combination, the manufacturing information to be recorded on the IC tag 9 may be limited to information that is convenient to directly read from the IC tag 9. For example, it is preferable that the date of manufacture, the place of manufacture, the brand of enclosed grease, the gap between elemental products, the quality assurance period, precautions for handling, and the like for the machine element product 1 be recorded on the IC tag 9.
(Information reading use process R3)
In this process, at any time after the shipment, the record information of the IC tag 9 is read, and the purchase information is obtained from the read information or from the information obtained by collating the read identification information with the database 10. One of confirmation of material, confirmation of manufacturing process, confirmation of processing condition information, confirmation of inspection result, etc. is performed. Various other uses recorded in the IC tag 9 or the database 10 may be performed.

Also in this management method, it is possible to confirm any processing condition information such as a forging process, a heat treatment process, a grinding process, etc. in an information reading utilization process R1 at any time after shipment. Therefore, even in the case of a mechanical element product 1 having a rolling element and having a plurality of element products 2 and requiring strict quality and accuracy, such as a rolling bearing, it is easy to elucidate the cause when a problem occurs. it can. Further, identification information is recorded in the IC tag 9 attached to the machine element product 1, and various information is recorded in the database 10 in correspondence with the identification information. Instead, a large amount of information can be extracted from the database 10. Further, the remaining storage capacity of the IC tag 9 can be used for various kinds of history management after shipment and after delivery to customers.
The details of the management method and the database 10 will be described later with reference to FIGS.

In each of the above embodiments, the collection of various types of manufacturing information to be recorded in the manufacturing information recording process R2 is recorded in the production management database 14 and recorded in the IC tag 9 of the machine element product 1. Alternatively, the manufacturing may be performed by using an IC tag 4 for a manufacturing process different from the IC tag 9 attached to the machine element product 1.
According to the method of recording in the manufacturing management database 14, predetermined manufacturing information from the purchase of the material of the component 2 of the machine element product 1 to the forging process, the heat treatment process, the grinding process, and the inspection is stored in the manufacturing management. And recording the information in the database 14 for use in association with the lot number of the component 2 or the identification number of the component, and recording the recorded information on an IC tag attached to the machine component. The manufacturing management database 14 is provided, for example, in one or more computers (not shown) in a computer network.

  The method of using the IC tag 4 for the manufacturing process will be described later in detail with reference to FIGS. 2 and subsequent drawings, but the outline is as follows. In this method, predetermined manufacturing information from the purchase of the material of the component 2 of the machine component 1 to the forging process, the heat treatment process, and the grinding process is transferred to the manufacturing process IC tag 4 prepared for each lot number of the component 2. And a step of reading the recorded information and recording a part or all of the read information on the IC tag 9 attached to the machine element product 1. The manufacturing information recorded on the IC tag 4 for the manufacturing process includes processing condition information in at least one of a forging process, a heat treatment process, and a grinding process.

  The method of using the IC tag 4 for the manufacturing process is divided into a case of a machine element product 1 which is individually inspected such as a special order product and a case of a machine element product which is inspected by lot such as a general product. is there. FIG. 2 shows the case of an individual inspection product (special order product), and FIG. 3 shows the case of a lot-specific inspection product (general product). Since the inspection after the grinding process and the inspection after assembly differ between the individual inspection product (special order product) and the inspection product after lot (general product) between the individual inspection and the inspection by lot, Individual inspection products (custom products) will be explained, and differences between lot inspection products (general products) and individual inspection products (custom products) will be explained.

  A machine element product 1 to be managed by this quality control method is an assembly of a plurality of types of element products 2 ((1) to (3)), and the plurality of types of element products 2 ((1) to (3)) is manufactured from a material purchase S1 through a forging step S2, a heat treatment step S3, and a grinding step S4. Examples of the corresponding machine element product 1 include rolling bearings, constant velocity joints and other shaft couplings, and ball screws. The element products 2 ((1) to (3)) are an inner ring 51, an outer ring 52, and a rolling element 53 when the machine element product 1 is a rolling bearing as shown in FIG. The machine element product 1 may include an element 3 different from the element 2 manufactured through the forging step S2, the heat treatment step S3, and the grinding step S4 from the material purchase S1. When the machine element product 1 is a rolling bearing, the retainer 54 (FIG. 11) and the seal 55 are the above-mentioned separate element products 3.

  Each of the steps from the material purchase S1 to the forging step S2, the heat treatment step S3, and the grinding step S4 is roughly divided into steps from material purchase to completion of an element product. Or may include a step that does not correspond to a step name. The names of the respective steps S1 to S4 are names of processes representing the divided steps.

This management method includes the following steps (1) to (4) for each of the above-mentioned element products 2 ((1) to (3)). Take the process. The lots of each process may be separated on the downstream side of the manufacturing process, but are not merged.
(1). Management process at the time of material purchase (S1).
At the time of purchasing the material of each element product 2, the material lot number of the corresponding material lot 5 and information on the purchased material are recorded in the IC tag 4 prepared for each material lot 5.
(2). Management process of forging process (S2).
An IC tag 4 for each material lot 5 or an IC tag 4 that inherits the recorded information of the IC tag 4 for each material lot 5 is prepared for each forging lot 6, and forging of the forging lot 6 corresponding to these IC tags 4 is performed. Record the lot number and information obtained in the forging process.
(3). Management process of the heat treatment step (S3).
An IC tag 4 for each forging lot 6 or an IC tag 4 that has inherited the recorded information of the IC tag 4 for each forging lot 6 is prepared for each heat treatment lot 7. The heat treatment lot number and information obtained in the heat treatment process are recorded.
(Four). Management process in the grinding step (S4) and the subsequent inspection step.
An IC tag 4 for each heat treatment lot 7 or an IC tag 4 that has inherited the recorded information of the IC tag 4 for each heat treatment lot 7 is prepared for each grinding lot 8. The processing conditions are recorded. Further, the IC tag 4 for each grinding lot 8 or the IC tag 4 that has inherited the recorded information of the IC tag 4 for each grinding lot 8 is used for each of the element products 2 or a set of the same kind of element products 2 which is a unit of inspection. Each IC tag 4 is prepared and the corresponding grinding lot number and the information obtained in the inspection process are recorded.

  An IC tag 9 for use after completion is attached to each machine element product 1 assembled from the above component products 2 ((1) to (3)) between before and after assembly. After the above-described inspection process of the serial number unique to each machine element product 1 and each of the element products 2 ((1) to (3)) used for the machine element product 1, At least the serial number of the record information of the IC tag 4 is recorded. In the database 10, the record information of the IC tag 4 after the inspection process of each of the element products 2 ((1) to (3)) used for the machine element product 1 and the The inspection information after completing the product 1 is recorded.

The IC tag 4 used in each of the above steps (S1) to (S4) may be the same throughout each step, and another IC tag 4 may be used in each step to transfer the recording information of the IC tag in the previous step. You may. If the lot is split downstream of the process, to prepare a new IC tag 4, before may be posting record information process, also previously, the IC tag 4 for the number of lots that lots wither min The information may be additionally recorded on the same IC tag 4 through each process.
In each of the steps (S1) to (S4), the lot number and the information of each step recorded on the IC tag 4 are added for each step as shown in FIG.

  In each step, the IC tag 4 is attached to, for example, a transport container 11 for storing the element product 2. The containers 11 are, for example, a basket, a box, a pallet, or the like. In this case, the IC tag 4 may be directly attached to the containers 11 or may be attached to a visual identification tag 12 attached to the containers 11 as shown in FIG. The attachment of the IC tag 4 to the containers 11 may be a detachable attachment. By attaching the IC tag 4 to the containers 11, the IC tag 4 prepared for each lot can always be moved together with the component 2, and handling of the IC tag 4 is easy. Further, information can be recorded on the IC tag on the transport path 13 by a conveyor or the like of the element product 2.

The details of each management process will be described.
(1). Management process at the time of material purchase (S1).
The material is purchased in the form of a lump of steel, a steel plate, a steel pipe, a steel wire, or the like. The purchased materials are subjected to various quality inspections, for example, in material lot units. In this management process, the information of the purchased material recorded on the IC tag 4 is divided into source information and quality information of the material. The source information includes the company name of the selling company, the factory location of the company, and the like. The quality information is information on tissue hardness, nonmetallic inclusions, and the like. As the quality information, the result of the material inspection performed after purchasing the material is recorded on the IC tag, but the information obtained from the distributor or both may be recorded. In this process, information is recorded on the IC tag 4 by, for example, acquiring information from a purchase management computer (not shown) or the like via a recording terminal.

(2). Management process of forging process (S2).
The forging process (S2) has various forms depending on the type of the machine element product 1 and the type of the element product 2. FIG. 7 shows the steps of each element product 2 when the machine element product 1 is a rolling bearing. In the element product 2 serving as the inner ring and the outer ring, the forging step (S2) includes forging to form the inner ring and the outer ring into a rough shape, and turning the forged product. In the element product 2 to be a rolling element such as a steel ball, a forging process (S2) includes stamping, brushing, and raw polishing processes.
The recording of information on the IC tag 4 in the forging step (S2) may be performed once in the entire forging step (S2), or may be performed for each step in the forging step (S2). . For example, when the element product 2 is an inner ring or an outer ring of a rolling bearing and forging and turning are performed as shown in FIG. 7, information such as a width dimension, an inner diameter dimension, a groove dimension, and a chamfer dimension measured after the turning is integrated into an IC. Record in tag 4. When the element 2 is a rolling element and is processed in each step of FIG. 7, information such as dimensions, distortion, and appearance is recorded after stamping, and measurements are performed after brushing and after raw polishing, respectively. And record information such as dimensions, sphericity, and appearance. Further, processing condition information is recorded.
The method of recording information on the IC tag 4 in this process is based on a database 14 for manufacturing management such as process management or inspection management used for each process such as the forging process (S2). 15. Information that requires manual input by the operator is recorded by the input means 16 such as a keyboard, as shown in FIG.
When the forging lot 6 is larger than the material lot 5 in the previous process, a new IC tag 4 is prepared, and the recording information of the IC tag 4 of the material lot 5 is transcribed to this using the IC tag duplicating means 17. Then, the information of the forging process is recorded in the IC tag 4 that has inherited the information by the transcription. Also in the following steps, when the number of lots increases, the data is transferred to a new IC tag 4 in the same manner as described above.

(3). Management process of the heat treatment step (S3).
When heat treatment is performed, inspection is performed later. When the component 2 is an inner ring or an outer ring of a rolling bearing, an inspection for hardness, deformation, structure, and the like is performed. When the component 2 is a rolling element of a rolling bearing, the hardness, the structure, and the like are inspected. These inspection results are recorded as information on the heat treatment process. In addition, heat treatment conditions and the like may be recorded.

(Four). Management process in the grinding step (S4) and the subsequent inspection step.
The grinding step (S4) has various forms depending on the type of the machine element product 1 and the type of the element product 2. When the component 2 is the inner ring or outer ring of the rolling bearing, width grinding, outer diameter grinding, groove grinding, inner diameter grinding, groove super finishing, etc. are performed as a grinding step (S4) as shown in FIG. When the component 2 is a rolling element of a rolling bearing, rough polishing, medium polishing, fine polishing, lapping, and the like are performed. In each of these steps, a completed product of that step is inspected. The information recorded on the IC tag 4 is information on the processing conditions for each of the above steps in the grinding step (S4). The information on the processing conditions is, for example, the type of the grindstone and the processing speed. After the grinding process is completed, an inspection is performed, and the result is recorded on the IC tag 4. As the inspection result information, various dimensions, for example, in width grinding of inner and outer rings, dimensions, width irregularity, appearance, etc., in outer diameter grinding of outer rings, outer diameter dimensions, roundness, cylindricity, appearance, etc. . In the groove grinding of the inner and outer rings, the dimensions, roundness, radial run-out, axial run-out, groove center difference, and the like of the portion to be grounded. In the inner diameter grinding of the inner ring, the inner diameter dimension, roundness, and the like are used. The dimensions, appearance, etc., of the superfinishing of the inner and outer ring grooves. When the element product 2 is a rolling element, the finished product which is a completed product of the grinding process (S4), such as the size and roundness of inspection results after rough grinding and other processes in the grinding process (S4). 2, the appearance, dimensions, sphericity, diameter difference, hardness, acoustics, microscopic inspection results, etc., which are the inspection results.
In the grinding step (S4), 100% inspection is performed in the case of a custom-ordered product or the like. In the case of 100% inspection, the IC tags 4 are prepared by the number of element products 2 and the grinding lot number of the element product 2 corresponding to the IC tag 4 And information such as individual inspection results. In addition to the grinding lot number, a number for identifying each component 2 may be added and recorded. When a large number of element products 2 are used in one machine element product 1 such as a rolling element in a rolling bearing, a set of element products 2 used in one machine element product 1 or the same portion of one machine element product A set of element products 2 used for (for example, each row in a double row bearing) may be regarded as one element product 2, one IC tag 4 may be prepared, and information for each group may be recorded.

Assembly of the machine element product 1 and the subsequent management process.
Each element product 2 manufactured as described above is assembled into one machine element product 1 in an assembly process. The IC tag 9 is attached to the machine element product 1 before the assembly and after the assembly. That is, the IC tag 9 may be attached in a state where the component 2 is alone, or may be attached after the assembly is completed. This attachment may be performed inside the machine element product 1 or on the surface. The IC tag 9 attached to the machine element product 1 needs to be small enough not to hinder the function and handling of the machine element product 1. IC tags have a size of less than 1 mm, and for example, those having such dimensions are used. FIG. 11 shows an example of mounting the IC tag 9 when the machine element product 1 is a rolling bearing. The IC tag 9 is embedded in a mounting hole 56 provided on the width surface of the outer ring 52 and is molded with a resin 57. The attachment of the IC tag 9 is performed, for example, after the grinding process (S4) of the outer race 52 is completed, with the outer race 52 alone. Note that the IC tag 9 may be attached to the inner ring 51, the retainer 54, the seal 55, or the like, instead of being attached to the outer ring 52.

  When the assembly of the machine element products 1 is completed, various inspections are performed as finished product inspections. This inspection is performed, for example, after the attachment of the IC tag 9, but may be performed before the attachment depending on the attachment form. As a finished product inspection, when the machine element product 1 is a rolling bearing, each factor such as outer ring, inner diameter, outer diameter, width dimension, roundness, cylindricity, radial runout, axial runout, side runout, clearance, sound, etc. is inspected. I do. In the case of an individual inspection product such as a custom-ordered product, the completed product inspection is performed on all the machine element products 1.

In the process of assembling the machine element product 1, the record information of the IC tag 4 of each of the element products 2 constituting the machine element product 1 is recorded in the database 10 according to the serial number as shown in FIG. Also, the inspection result of the finished product inspection is recorded corresponding to the serial number. The production number is a number unique to each machine element product, and is, for example, a serial number. If the machine element product 1 includes another component (for example, a retainer) 3 that does not go through the above-described steps, information on the separate component 3 is also recorded in the database 10.
At least the serial number is recorded on the IC tag 9 attached to the machine element product 1 as described above. In addition to the serial number, the recording information of the IC tag 4 of each component 2 and the result of the completed product inspection may be recorded on the IC tag 9. When recording the result of the finished product inspection on the IC tag 9 attached to the machine element product 1, even if the inspection result is recorded on the IC tag 9 in the inspection process and the information is transferred from the IC tag 9 to the database 10, good. Further, the IC tag 9 may be attached to not only the machine element product 1 but also the packing 1A (FIG. 1) of the machine element product 1, and the serial number or the like may be recorded.

The database 10 is provided in a management computer system 19 provided on a computer network 18 as shown in FIG. The recording information F for each machine element product 1 is recorded in the storage unit 10a of the database 10. The computer network 18 is, for example, a wide area network such as the Internet, or a local area network in a factory connected to the wide area network. The database 10 includes a storage unit 10a and a database management unit 10b that manages input / output and search for the storage unit 10a. The database 10 only needs to be conceptually recognizable as one quality control database. Even if it is physically a collection of a plurality of databases, it can also store information with other various databases. They may be shared. For example, even if the database 10 is constituted by a plurality of computers provided on a computer network 18, the database 10 for manufacturing management, the database for technical information management and the like and the recording information They may be shared.
The database 10 is connected via the network 18 to the information processing equipment in the machine element product manufacturing factory, as well as to the technical department, the warehouse, the sales office, the information processing equipment 40 in the business establishment of the customer company, and the portable terminal. Connected.

According to this quality control method, history information from the purchase of the material of each component 2 to the inspection content after completion of the machine component 1 is stored in the management computer system 10 and the IC tag 9 attached to the machine component 1 is stored. Since the serial number is recorded in the., The history information can be managed in one-to-one relationship with the machine element product by collating the serial number with the management computer system 10. For example, at any stage after shipment, a user of the machine element product 1 or a person who performs maintenance service can know the history information of the machine element product 1. Since information generated for each manufacturing process of each element product 2 of the machine element product 11 is recorded together with the lot number in the IC tag 4 prepared for each lot of the process for each process, detailed history information can be managed. . Therefore, when a defective product is generated, it is easy to take measures such as replacement, identification of a defective product mixing range, future improvement, and the like.
Since the information for each process is recorded on the IC tag 4 prepared for each lot of the process, it is possible to record more detailed information than when recording it on a handwritten slip. In contrast, since the place where information is to be input is the IC tag 4, the information can be visually recognized, the input operation becomes clear, and errors hardly occur. Also, unlike a computer in which all miscellaneous information from the purchase of the material of the element 2 to each step of the grinding process is recorded in a computer, in the production process, the recorded information is stored in the IC tag 4 so that the burden on the computer is increased. Lighter and easier to manage. Therefore, more detailed information can be easily managed.

Further, since the serial number of the machine element product 1 is recorded on the IC tag 9 attached to the machine element product 1, the remaining storage area of the IC tag 9 can be used freely, and various uses after manufacturing, for example, It can be used for shipping management, distribution management, customer management, maintenance management, and the like.
That is, as described above with reference to FIG. 1, the machine element product 1 is generally delivered to a warehouse after completion of assembly, inspection, and shipment, and delivered from a sales office to a customer. In the case of special order products, they may be delivered directly to customers after shipment. The customer uses the machine element product 1 by assembling it into the device and discards it after a durable period. In each of these processes, in addition to reading the serial number of the IC tag 9 attached to the machine element product 1 to know the history information, various uses utilizing the remaining storage area of the IC tag 9 can be achieved.

Next, a case where the machine element product 1 is a lot-specific inspection product like a general product will be described with reference to FIG. In the management of the inspection products for each lot, for each of the element products 2 ((1) to (3)), the following processes (1) to (3) and (4) 'are performed, The process described below is applied to the element product 1. The management processes (1) to (3) from the material purchase to the heat treatment process are the same for the lot-by-lot inspection products as the individual inspection products, and therefore, the description of these management processes (1) to (3) is omitted.
(1). Management process at the time of material purchase (S1).
(2). Management process of forging process (S2).
(3). Management process of the heat treatment step (S3).
(Four)'. Management process in the grinding step (S4) and the subsequent inspection step.
In the inspection process after the grinding process (S4), the IC tag 4 for each heat treatment lot 7 or the IC tag 4 that has inherited the recorded information of the IC tag 4 for each heat treatment lot 7 is prepared for each grinding lot 8, and these are prepared. Of the corresponding grinding lot 8 and the information obtained in the inspection process are recorded in the IC tag 4 of the first embodiment. The processing in the grinding step (S4) is the same for the lot-by-lot inspection product and the individual inspection product. Although the information to be recorded in the management process (4) 'is Ru information Hodea grinding lot 8 different test results, test items also elements article 2 is the same lot-specific article to be inspected even individual test products, of which Record the test results. Inspection items may be different for each lot inspection product and individual inspection product, but the recording of those inspection results on the IC tag 4 is performed similarly regardless of the inspection item.

Assembly of the machine element product 1 and the subsequent management process.
An IC tag 9 is attached to each machine element product 1 from which each element product 2 is assembled from before assembling to after assembling. A manufacturing lot number and the above-mentioned machine element At least the production lot number is recorded in the record information of the IC tag 4 after the inspection process of each of the component products 2 ((1) to (3)) used for the product 1, and the production lot number and the Correspondingly, the record information of the IC tag 4 after the inspection process of each of the element products 2 ((1) to (3)) used for the machine element product 1 and the inspection information after the completion of the machine element product 1 Record
The management of the inspection products for each lot is the same as that described for the individual inspection products, except for the items specifically described.

  In the case of this management method, the management is performed for each production lot of the machine element product 1 and is not a one-to-one management. However, for other items, the individual inspection described in the first quality control method of the machine element product is performed. The same actions and effects as in the case of the product can be obtained. The collation with the management computer 10 is performed using the lot number obtained from the IC tag 9 attached to the machine element product 1.

  The IC tags 4 and 9 used in each of the above management methods will be described. Recording and reading of information with respect to the IC tags 4 and 9 are performed by the IC tag reader / writer 20. The IC tag reader / writer 20 has an antenna 21 that faces the IC tags 4 and 9. The IC tags 4 and 9 can record and read information in a non-contact manner, and include an IC chip (chip of an integrated circuit) 25 and an antenna 26. The IC chip 25 and the antenna 26 are integrally surrounded by a resin (not shown). There are various types, shapes and sizes of IC tags, and in addition to plate-shaped objects, there are, for example, square or spherical objects having a size of less than 1 mm, and various storage capacities. May be appropriately selected according to the size, type, and the like. The IC tag 4 used for managing the component products 2 may be relatively large because it is attached to the containers 11, but the IC tag 9 attached to the machine element product 1 is preferably small. As the IC tags 4 and 9, for example, FRID tags to which RFID (Radio Frequency Identification) technology is applied can be used. The RFID tag of the FRID format includes a type using electrostatic coupling, electromagnetic coupling, electromagnetic induction, microwave, light, or the like as a transmission method, and any of these types may be used. The format is used. In addition, some IC tags can be used even if there is metal in the periphery, and such a tag is preferable when the IC tag is attached to the machine element product 1. FIG. 9 shows a specific circuit example of the IC tag 3. The IC chips 4 and 9 include a central processing unit (CPU) 27, a memory 28, a transmission / reception circuit 29, and a power supply circuit 30, and the power supply circuit 30 obtains power from the antenna 26. The memory 28 does not require a power supply for storing information.

  In each of the above embodiments, the case where the machine element product 1 is a rolling bearing has been mainly described. However, the management method of the present invention employs an element manufactured through a forging step, a heat treatment step, and a grinding step after purchasing a material. The present invention can be applied to a machine element product 1 that is assembled including a plurality of types of products 2.

It is an explanatory view of a quality control method of machine element goods concerning a 1st embodiment of this invention. It is explanatory drawing regarding the management of the element goods in the quality management method of the machine element goods. It is explanatory drawing regarding management by another method of the element goods in the quality control method of the machine element goods. FIG. 4 is an explanatory diagram showing a change in recorded content of each IC tag. It is a conceptual explanatory view of a recording form on an IC tag during a manufacturing process of an element product. FIG. 4 is an explanatory diagram showing a relationship between a database and an IC tag. It is explanatory drawing of the assembly structure of a machine element product. FIG. 4 is an explanatory diagram illustrating a relationship between an IC tag and a tag reader / writer. It is a circuit diagram of an IC tag. Is an explanatory view showing the concept of a write Minokatachi state writing containers elements article into the IC tag. It is the fragmentary sectional view in the state where an IC tag was attached to machine element goods, and an enlarged drawing of a part thereof.

Explanation of reference numerals

1 ... machine element product 2 ... element product 3 ... separate element product 4 ... IC tag 5 ... material lot 6 ... forging lot

Claims (12)

For machine element products consisting of a plurality of element products that have rolling elements, use IC tags that can record and read information in a non-contact manner. From the purchase of materials related to machine element products, the forging process, heat treatment process, grinding process, and inspection. It is a quality control method of a machine element product that records predetermined manufacturing information up to and manages the machine element product,
Attaching the IC tag to any of the plurality of component products of the machine component product at the time of manufacture or completion of manufacture of the machine component product;
Processing condition information and material information in at least one of the forging process, heat treatment process, and grinding process for the machine element product by the time of shipment or delivery to a customer at the IC tag attached to the machine element product. Recording at least one of:
At any time after shipment, an information reading utilization step of reading recorded information of the IC tag and confirming at least one of the processing condition information and material information from the read information,
A quality control method for machine element products that enables traceability for quality control. For a machine element product having rolling elements and composed of a plurality of element products, predetermined manufacturing information from purchase of materials related to the machine element product in association with identification information of the machine element product, forging process, heat treatment process, grinding process and inspection. A quality control method of a machine element product, which manages a machine element product using a database capable of extracting stored contents by the identification information and an IC tag capable of recording and reading information in a non-contact manner. ,
Attaching the IC tag to any of the plurality of component products of the machine component product at the time of manufacture or completion of manufacture of the machine component product;
According to the above database, identification information about the machine element product is recorded on an IC tag attached to the machine element product at the time of shipment or delivery to a customer, and a forging process and a heat treatment process for the machine element product are performed. A step of recording at least one of processing condition information and material information in at least one of the grinding steps,
At any time after the shipment, the recorded information of the IC tag is read and read from the read information, or the read information is compared with the database and the information obtained by the check is used to check the purchased material, check the manufacturing process, Including at least one of processing condition information and material information, and an information reading and using process of confirming inspection results,
A quality control method for machine element products that enables traceability for quality control. For a machine element product having rolling elements and composed of a plurality of element products, predetermined manufacturing information from purchase of materials related to the machine element product in association with identification information of the machine element product, forging process, heat treatment process, grinding process and inspection. A quality control method of a machine element product, which manages a machine element product using a database capable of extracting stored contents by the identification information and an IC tag capable of recording and reading information in a non-contact manner. ,
Attaching the IC tag to any of the plurality of component products of the machine component product at the time of manufacture or completion of manufacture of the machine component product;
Write the identification information of the machine element product to the IC tag attached to the machine element product at the time of shipment or customer delivery according to the above database, and manufacture the date and time of manufacture of the machine element product. The process of recording at least one of the following information: location, encapsulated grease brand, gap between component products, quality assurance period, handling precautions,
At any time after the shipment, read the recorded information of the IC tag and read the information, or from the information obtained by collating the read information with the database, check the purchased material, confirm the manufacturing process, Including at least one of the processing conditions and material information, and an information reading and using process for confirming inspection results.
A quality control method for machine element products that enables traceability for quality control. According to any one of claims 1 to 3, predetermined manufacturing information from the material purchase of the element product of the machine element product to the forging process, the heat treatment process, and the grinding process is prepared for each lot number of the component product. A step of recording each step in an IC tag for a manufacturing process, and a step of reading this recorded information and recording a part or the whole of the read information on an IC tag attached to the machine element product, A quality control method for a machine element product including at least one of processing condition information and material information in at least one of a forging step, a heat treatment step, and a grinding step as manufacturing information recorded on the IC tag for the manufacturing process. A manufacturing management database according to any one of claims 1 to 3, wherein predetermined manufacturing information from purchase of material of the element product of the machine element product to forging process, heat treatment process, grinding process, and inspection is stored in a database for manufacturing management. A quality control method for a machine element product including a process of recording in association with a lot number of the component product or an individual product identification number, and a process of recording the recorded information on an IC tag attached to the machine component product. . It is a quality control method for machine element products that is assembled including multiple types of element products manufactured through the forging process, heat treatment process, and grinding process from material purchase, and individually inspected.
A process of recording the material lot number of the corresponding material lot and information on the purchased material on an IC tag prepared for each material lot when purchasing the material of each of these element products;
In the forging process, an IC tag for each material lot or an IC tag that inherits the recording information of the IC tag for each material lot is prepared for each forging lot, and the forging lot number and the forging lot number corresponding to these IC tags are prepared. A process of recording information obtained in the forging process;
In the heat treatment step, IC tags for each forged lot or IC tags that inherit the recorded information of the IC tag for each forged lot are prepared for each heat treatment lot, and the heat treatment lot number and the heat treatment for the heat treatment lot corresponding to these IC tags are prepared. Recording information obtained in the process;
In the inspection step after the above-mentioned grinding step, an IC tag for each heat treatment lot or an IC tag inheriting the record information of the IC tag for each heat treatment lot is used for each element product or a set of element products of the same type as a unit of inspection. And a process of recording information obtained in the corresponding grinding lot number and the inspection process on these IC tags. An IC tag is attached in between, and the IC tag attached to this machine element product has a serial number unique to each machine element product, and the IC tag after the above-described inspection process of each element product used for the machine element product. Of the record information, at least the serial number is recorded, and in the database, in correspondence with the serial number, record information of the IC tag after the inspection process of each element used for the machine element product, And the process of recording inspection information after the completion of machine element products,
And a quality control method for machine element products including: It is a quality control method of a machine element product that is assembled including a plurality of types of element products manufactured through a forging process, a heat treatment process, and a grinding process from material purchase, and inspected by lot.
A process of recording the material lot number of the corresponding material lot and information on the purchased material on an IC tag prepared for each material lot when purchasing the material of each of these element products;
In the forging process, an IC tag for each material lot or an IC tag that inherits the recording information of the IC tag for each material lot is prepared for each forging lot, and the forging lot number and the forging lot number corresponding to these IC tags are prepared. A process of recording information obtained in the forging process;
In the heat treatment step, IC tags for each forged lot or IC tags that inherit the recorded information of the IC tag for each forged lot are prepared for each heat treatment lot, and the heat treatment lot number and the heat treatment for the heat treatment lot corresponding to these IC tags are prepared. Recording information obtained in the process;
In the inspection process after the above-mentioned grinding process, IC tags for each heat treatment lot or IC tags that inherit the recorded information of the IC tags for each heat treatment lot are prepared for each grinding lot, and the IC tags for the corresponding grinding lots are prepared. Recording a grinding lot number and information obtained in an inspection process, and attaching an IC tag to each of the machine element products assembled from the above component products from before assembling to after assembling. In the attached IC tag, at least the production lot number of the production lot number and the record information of the IC tag after the above-described inspection process of each component used in the machine element product is recorded, and the production lot is recorded in a database. Corresponding to the number, the recorded information of the IC tag after the above-mentioned inspection process of each element used in the above-mentioned machine element product, and after completion of the machine element product The process of recording the inspection information of
And a quality control method for machine element products including: 8. The container according to claim 6, wherein the IC tag prepared for each material lot, the IC tag prepared for each forging lot, and the IC tag prepared for each heat treatment step are containers containing a plurality of materials of the same material lot. , A quality control method for machine element products to be attached to containers containing a plurality of element products of the same forging lot and containers containing element products of the same heat treatment lot. The machine element product according to claim 6 or 7, wherein the machine element product includes an element product different from an element product manufactured through a forging process, a heat treatment process, and a grinding process from material purchase. A quality control method for a machine element product, in which information on a product is recorded in the database in association with the production number or the lot number after the assembly of the machine element product. 10. The machine element product according to claim 1, wherein the machine element product is a rolling bearing, and the inner ring, the outer ring, and the rolling element are manufactured as components through a forging process, a heat treatment process, and a grinding process from the material purchase. Quality control method for machine element products including moving objects. The machine element product according to any one of claims 1 to 10, wherein the machine element product is filled with grease at the time of assembling, and the IC tag attached to the machine element product has an assembly date of the machine element product. Record the quality control method of machine element products. 12. The quality control method for a machine element product according to claim 1, wherein information such as the location from shipment of the machine element product to delivery to a customer is recorded on an IC tag attached to the machine element product. .

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