JP2006185314A - Tightening work quality control system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tightening work quality control system which takes out quality data concerning to it quickly when imcompatibility with poor tightening occurs, and verifies it. <P>SOLUTION: The tightening work quality control system has an IC tag 2a which is installed in the tightening member and is recorded with quality data concerning the tightening work and an IC tag writing-in unit 8 which records quality data concerning the tightening work to the IC tag at every tightening work in the tightening work quality control system which controls quality of tightening work tightening the members 4 and 6 to be tightened using the tightening member 1 and unifying them. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a tightening work quality management system for managing the quality of a tightening work for integrating a plurality of members by tightening bolts or nuts.

  Conventionally, a non-contact IC tag includes an antenna for signal transmission / reception and a circuit that receives a signal from a reader and transmits a response signal to an interrogator. Then, for each individual finished product, the manufacturing history up to each material constituting the finished product is stored in a non-contact IC tag, and data is read from the non-contact IC tag using an interrogator, or the non-contact IC tag The data is written in and the process management of the factory production of the finished product is performed (for example, see Patent Document 1).

JP 2003-271216 A

However, in the process control using the conventional non-contact IC tag, the quality control at the time of construction of each material has not been considered. In particular, special skills are required at each stage of the tightening operation, such as selection of tightening tools and confirmation of tightening torque. It is necessary to record the quality data necessary for the nonconformity analysis. However, since it is difficult to record quality data on individual bolts and nuts, it is difficult to investigate the cause when performing horizontal deployment and countermeasures for the same model, and it is necessary to re-inspect all parts as a reliable measure. There is.
In addition, for important products, even if quality data such as the name of the worker who is certified for the skill and the date and time when the work was performed is recorded on the assembly drawing, these quality data can be quickly retrieved when a nonconformity occurs. There is a problem that it cannot be used for verification.

  An object of the present invention is to provide a tightening work quality management system for quickly extracting and verifying quality data related to a non-conformity due to a tightening failure.

  A tightening work quality management system according to the present invention is a tightening work quality management system for managing the quality of a tightening work in which a tightened member is fastened and integrated using a tightening member, and is attached to the tightening member. And an IC tag for recording quality data relating to the tightening operation, and an IC tag writing device for recording the quality data relating to the tightening operation to the IC tag each time the tightening operation is performed.

  The effect of the tightening work quality control system according to the present invention is that the quality data is recorded on the IC tag for each bolt, and when a non-conformance of the tightening failure occurs, the IC attached to the bolt in which the non-conformity has occurred. Since the quality data recorded on the tag can be easily read, horizontal development, countermeasures for the same model, and prevention of recurrence can be considered based on the quality data.

Embodiment 1 FIG.
FIG. 1 is a view for explaining a state of recording quality data according to the first embodiment of the present invention. FIG. 2 is a block diagram of the IC tag according to the first embodiment. FIG. 3 is a block diagram of the IC tag writing apparatus according to the first embodiment. FIG. 4 is a block diagram of the IC tag reading device according to the first embodiment.
In the tightening work quality control system according to Embodiment 1 of the present invention, quality data related to the tightening work is recorded on the IC tag 2a attached to the bolt 1 as a tightening member, and there is a nonconformity related to the tightening failure. When it occurs in the member to be tightened 3, the quality data recorded on the IC tag 2a attached to the bolt 1 tightening the member to be tightened 3 is read out and the cause of the nonconformity is verified.

The IC tag 2a is fixed in a recess provided in the head 1a of the bolt 1, and the upper surface of the IC tag 2a is covered with resin. A strain gauge 1c as an axial force measuring unit is attached to the side surface 1b where the spiral of the bolt 1 is not cut, and a lead wire 1d drawn from the strain gauge 1c is connected to the IC tag 2a. The IC tag 2a monitors the axial force value remaining in the shaft portion of the bolt 1 based on the strain amount of the strain gauge 1c.
The bolt 1 is formed by tightening a block 4 provided with a hole (not shown) in which a spiral adapted to the bolt 1 is cut and an angle 6 provided with a through hole 5 through which the bolt 1 passes. 4 and angle 6 are used to integrate. In the following description, the bolt 1 is used as the fastening member and the block 4 and the angle 6 are used as the fastening member 3 by way of example. However, the present invention is not limited to this. The present invention can also be applied when tightening and integrating with a tightening member comprising a nut and a nut. And the operation | work which fastens and tightens the to-be-tightened member 3 with a fastening member is called a fastening operation | work.

  In the tightening operation, the hole of the block 4 and the through hole 5 of the angle 6 are aligned, and then the bolt 1 is screwed into the hole of the block 4 using a torque wrench 7 as a tightening tool, and the angle 6 is blocked by the block 4. Tighten to. The torque wrench 7 is provided with an IC tag writing device 8 for writing quality data to the IC tag 2a. Further, the torque wrench 7 has a strain gauge (not shown) used for measuring the torque value attached to the head portion 7a that grips the head 1a of the bolt 1, and a torque value calculated from a strain value measured by the strain gauge is a signal. The data is transmitted to the IC tag writing device 8 via the cable 7b.

Although an example in which the torque value is electrically measured using a strain gauge will be described, even if the set torque value is mechanically transmitted to the IC tag writing device 8 by the cam / link mechanism, the pointer is visually checked. It may be confirmed and input from the numeric keypad 17 of the IC tag writing device 8.
The torque wrench 7 will be described as an example of the tightening tool, but the present invention can be applied as long as the bolt 1 or the nut such as a spanner, driver, or wrench can be tightened.

  The quality data in this tightening work includes the shape, material, type, unique number, product number, lot number, identification number of the torque wrench 7, work date, work place, worker name, worker skill certification number, It consists of the expiry date, torque value, etc. of the worker's skill certification. Further, the axial force value is also monitored by the IC tag 2a as quality data in the tightening operation. Among these, the work location, the worker name, the skill certification number of the worker, and the expiration date of the skill certification of the worker are collectively referred to as quality data related to the work. Further, the worker name, the skill certification number of the worker, and the expiration date of the skill certification of the worker are collectively referred to as quality data related to the worker. In addition, these quality data are illustrated for description, and are not limited to these.

  In the tightening work quality management system for managing the quality of the tightening work, as shown in FIG. 1, the quality data is recorded on the IC tag 2a and the IC tag 2a that are attached to the bolt 1 and in which the quality data is recorded. The IC tag writing device 8 and the IC tag reading device 9 for reading the quality data recorded on the IC tag 2a when a nonconformity related to the tightening failure occurs are used.

  As shown in FIG. 2, the IC tag 2 a includes a wireless unit 11 that wirelessly transmits and receives signals between the IC tag writing device 8 and the IC tag reading device 9, and the IC tag writing received by the wireless unit 11. Based on the signal from the device 8, the quality data included in the signal is recorded in the memory 12, and the quality data included in the signal from the IC tag reading device 9 received by the wireless unit 11 is requested to be transmitted. The control unit 13 includes the quality data recorded in the memory 12 in a signal and transmits the signal to the IC tag reading device 9, and the memory 12 in which the quality data is recorded. The control unit 13 further calculates and monitors the axial force value remaining in the shaft portion of the bolt 1 based on the amount of strain from the strain gauge 1 c attached to the bolt 1, and monitors from the IC tag reading device 9. In response to the inquiry about the axial force value, when the axial force value is equal to or less than a predetermined value, a signal indicating that the fastening is defective is returned to the IC tag reading device 9 together with the unique number of the bolt 1.

  As shown in FIG. 3, the IC tag writing device 8 writes the quality data input from the wireless unit 16 and the numeric keypad 17 that wirelessly transmit and receive signals to and from the IC tag 2a into the IC tag 2a. It comprises a writing unit 18 to request, a storage unit 20 for storing the identification number of the torque wrench 7, an internal clock 21, and a numeric keypad 17 for inputting quality data.

  As shown in FIG. 4, the IC tag reading device 9 includes a wireless unit 22 that wirelessly transmits and receives signals to and from the IC tag 2a, a reading unit 23 that requests the IC tag 2a to transmit quality data, and the read quality It is comprised from the memory | storage part 24 which memorize | stores data.

  Note that signals are transmitted and received wirelessly between the IC tag 2a and the IC tag writing device 8 and between the IC tag 2a and the IC tag reading device 9, but signals are transmitted and received by optical communication. However, the present invention can be applied.

The tightening operation of the object of quality control according to the present invention is to integrate the angle 6 to the block 4 by tightening the bolt 6 with the bolt 1. That is, in the tightening work, the operator prepares the block 4, the angle 6, and the bolt 1 based on the assembly drawing in which the work content is described. An IC tag 2 a is attached to the bolt 1. The unique number, product number, and production lot number of the bolt 1 are recorded on the IC tag 2a using another IC tag writing device 8 at the time of manufacture in the factory. The operator reads the product number of the bolt 1 recorded on the IC tag 2a of the bolt 1 using the IC tag reading device 9, and confirms that it is as specified in comparison with the product number described in the assembly drawing.
Next, the worker reads the identification number of the torque wrench 7 stored in advance in the storage unit 20 of the IC tag writing device 8 and records it on the IC tag 2 a of the bolt 1. Further, the time is counted from the internal clock 21 of the IC tag writing device 8, and the time is recorded in the IC tag 2a.
Further, the worker inputs the place where the tightening work is performed, the name of the worker to be performed, the skill certification number of the worker, and the expiration date of the skill certification from the numeric keypad 17 of the IC tag writing device 7, and enters the IC tag 2a. Record.
Further, for each tightening operation, the torque value applied to the bolt 1 tightened from the torque wrench 7 is recorded in the IC tag 2a.

Next, when an incompatibility of the tightening failure is found in the tightened member, the quality data (the unique number, the product number, the bolt 1) is obtained from the IC tag 2a attached to the bolt 1 using the IC tag reading device 9. The production lot number, the identification number of the used torque wrench 7, the work date and time, the work place, the worker name, and the torque value) are read out and used to verify the nonconformity.
Regardless of whether there is a non-conformity of tightening failure, the IC tag reading device 9 is used to query the IC tag 2a about the axial force value. In the IC tag 2a, the axial force value is below a predetermined value. At this time, a signal indicating that the looseness has occurred is returned to the IC tag reading device 9 together with the unique number of the bolt 1.

  In such a tightening work quality management system, quality data is recorded in the IC tag 2a for each bolt 1, and when a nonconformity occurs, it is recorded in the IC tag 2a attached to the bolt 1 in which the nonconformity has occurred. Therefore, it is possible to easily read out the quality data that has been set, and to consider horizontal development, countermeasures for the same model, and prevention of recurrence based on the quality data.

  In addition, when a nonconformity occurs in a certain bolt 1, the quality data of all bolts 1 that are likely to be related can be read using the quality data such as the product number. It can be used effectively for analysis.

  Further, by reading out the quality data recorded on the IC tags 2a attached to all the bolts 1 and summing up the data for each worker, each kind of product, etc., the work efficiency can be read from the quality data. .

  Since the IC tag 2a monitors the axial force value remaining in the shaft portion of the bolt 1, the bolt 1 whose axial force value is smaller than the predetermined value is clearly confirmed before the bolt 1 is loosened. be able to.

Further, since the IC tag writing device 8 is fixed to the torque wrench 7, it is only necessary to carry it, so that the transportation becomes easy. However, the IC tag writing device 8 is not necessarily fixed to the torque wrench 7.
In the first embodiment, the IC tag writing device 8 and the IC tag reading device 9 are provided separately, but they may be housed in one housing.

Embodiment 2. FIG.
FIG. 5 is a diagram for explaining a state of recording quality control data according to the second embodiment of the present invention.
The tightening work quality management system according to the second embodiment is different from the tightening work quality management system according to the first embodiment in the IC tag writing device 8B. Reference numerals are added and description is omitted.
As shown in FIG. 5, the IC tag writing device 8B according to the second embodiment further includes an IC memory reading device 30 in the IC tag writing device 8 according to the first embodiment.
Then, the IC memory reading device 30 reads from the IC memory 32 recorded using the personal computer 31 the place where the tightening work is performed, the worker who performs the work, the skill certification number of the worker, and the expiration date of the skill certification. . The quality data is recorded on the IC tag 2a.

  In such a tightening work quality management system, when handing the IC memory 32 in which the quality data related to the work is handed to the operator when instructing the tightening work, the quality data is delivered in a lump. Incorrect input and data tampering can be prevented, and highly reliable quality data can be obtained.

Embodiment 3 FIG.
FIG. 6 is a diagram for explaining a state of recording quality control data according to the third embodiment of the present invention.
The tightening work quality management system according to the third embodiment is different from the tightening work quality management system according to the first embodiment in the quality data input method for the worker, and the others are the same. The same reference numerals are given to the portions, and the description is omitted. Further, an IC tag writing / reading device 10 in which the functions of the IC tag writing device 8 and the IC tag reading device 9 according to the first embodiment are integrated is provided.

In the tightening work quality management system according to the third embodiment, as shown in FIG. 6, the quality data (worker name, worker skill certification number, skill certification expiration date) concerning the worker is previously stored in the worker. A certificate 34 to which the recorded IC tag 2c is attached is issued.
Then, the IC tag writing / reading device 10 reads the operator name, the skill certification number of the worker, and the expiration date of the skill certification from the IC tag 2 c and records them on the IC tag 2 a attached to the bolt 1.

  Such a tightening work quality management system can read the quality data related to the worker from the certificate 34, so that it is possible to prevent erroneous input and data falsification, and to make the quality data highly reliable. Can do.

Embodiment 4 FIG.
FIG. 7 is a block diagram of an IC tag writing apparatus according to Embodiment 4 of the present invention.
The tightening work quality management system according to the fourth embodiment is different from the tightening work quality management system according to the first embodiment in the IC tag writing / reading device 8C, and the other parts are the same. Is omitted and the description is omitted.

As shown in FIG. 7, the IC tag writing device 8C according to the fourth embodiment determines whether or not the bolt 1 is suitable for the torque wrench 7 to be used, and if the bolt 1 is not suitable for the torque wrench 7. When it is determined, a tool fitting unit 37 that issues an alarm is added to the IC tag writing device 8 according to the first embodiment.
Further, in the IC tag writing device 8C, a buzzer 38 that emits an alarm sound is added to the IC tag writing device 8 according to the first embodiment.
Further, the storage unit 20 stores the product number of the torque wrench 7 that matches each product number of the bolt 1.

  Such a tightening work quality control system judges whether or not the torque wrench 7 used for the tightening work is properly used, and issues an alarm when it is not suitable. Therefore, it is possible to prevent the tightening failure caused by the bending.

It is a figure for demonstrating a mode that the quality data concerning Embodiment 1 of this invention is recorded. 2 is a block diagram of an IC tag according to Embodiment 1. FIG. 1 is a block diagram of an IC tag writing device according to Embodiment 1. FIG. 1 is a block diagram of an IC tag reading device according to Embodiment 1. FIG. It is a figure for demonstrating a mode that the quality data concerning Embodiment 2 of this invention are recorded. It is a figure for demonstrating a mode that the quality data concerning Embodiment 3 of this invention is recorded. It is a block diagram of the IC tag writing device concerning Embodiment 4 of this invention.

Explanation of symbols

  1 bolt 1a (bolt) head 1c strain gauge 1d lead wire 2a 2c IC tag 3 block 4 through hole 5 angle 7 torque wrench 7a head (torque wrench) 7b Signal cable, 8 and 8B IC tag writing device, 9 IC tag reading device, 10 IC tag writing / reading device, 11 wireless unit, 12 memory, 13 control unit, 16 wireless unit, 17 numeric keypad, 18 writing Part, 19 reading part, 20 storage part, 21 internal clock, 30 IC memory reading device, 31 personal computer, 32 IC memory, 34 certificate, 37 tool fitting part, 38 buzzer.

Claims (7)

In the tightening work quality management system for managing the quality of the tightening work of tightening and tightening the tightened member using the tightening member,
An IC tag attached to the fastening member and recorded with quality data relating to the fastening work;
An IC tag writing device for recording quality data related to the tightening work on the IC tag at each tightening work;
A tightening work quality control system characterized by comprising:   2. The tightening work quality management system according to claim 1, wherein the IC tag writing device is attached to a tightening tool used for the tightening work.   3. The tightening work quality management system according to claim 1, wherein the IC tag writing device records a torque value applied to the tightening member on the IC tag.   The IC tag writing device is provided with an IC memory reading device that reads quality data from an IC memory in which quality data related to the work given to the worker every time a tightening work instruction is given. The tightening work quality control system according to any one of claims 1 to 3.   In the IC tag writing device, a storage unit storing information of a tightening tool suitable for use with the tightening member, and the tightening tool prepared based on the information of the tightening tool are prepared. A tool conforming portion that issues a warning when it is determined whether or not the use of the tightening member is suitable, and when it is determined that the use is not suitable, is provided. The tightening work quality control system to be described. An axial force measurement unit that is attached to the tightening member, measures an axial force value of the tightening member, and inputs the measured value to the IC tag;
An IC tag reading device that requests transmission of an axial force value of the fastening member to which the IC tag is attached to the IC tag;
Have
When there is a request for transmission of the axial force value, the IC tag returns, to the IC tag reading device, if the input axial force value of the tightening member is equal to or less than a predetermined value. The tightening work quality control system according to any one of claims 1 to 5. In the tightening work quality management system for managing the quality of the tightening work of tightening and tightening the tightened member using the tightening member,
An IC tag attached to the fastening member and recorded with quality data relating to the fastening work;
The quality data related to the worker is read from an IC tag attached to the certificate issued in advance to the worker and the quality data related to the worker is recorded. An IC tag writing / reading device for recording quality data related to the tightening work on an attached IC tag;
A tightening work quality control system characterized by comprising:

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