Grindstone tool
A grindstone tool forperformpredeterminedprocessing on a workpiece, wherein a radio IC tag from, and to, which information can be read, and written, without contact is embedded in the grindstone tool.
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The present invention relates to a grindstone tool which has a grindstone such as resinoid grindstone manufactured by kneading abrasive grains with a bonding material, molding the kneaded product into a predetermined form and baking it and is used to perform a predetermined processing on a workpiece.
DESCRIPTION OF THE PRIOR ARTIn the production process of a semiconductor device, a plurality of areas are sectioned by dividing lines called “streets” arranged in a lattice pattern on the front surface of a substantially disk-like semiconductor wafer, and a circuit such as IC or LSI is formed in each of the sectioned areas. After the back surface of this semiconductor wafer is ground to a predetermined thickness by a grinding machine, the semiconductor wafer is cut along the dividing lines to be divided into individual semiconductor chips.
A grinding stone is used to grind the back surface of the above semiconductor wafer, and a grindstone blade is also used to cut the semiconductor wafer along the dividing lines. For the above processing, grindstones having different characteristic properties according to processing purposes are used. As a grindstone used in the grinding stone and the grindstone blade is used a resinoid grindstone manufactured by kneading abrasive grains which differ according to the material of a workpiece with a bonding material, molding the kneaded product and baking it, as disclosed by JP-A2004-181575 and JP-A 8-224730.
Since the resinoid grindstone is manufactured by kneading abrasive grains with a bonding material, molding the kneaded product into a predetermined form and baking it as described above, its quality may vary depending upon production conditions such as the temperature of a kiln in the production process, the number of grindstones baked in the kiln, the position of the grindstone in the kiln, weather, etc. Therefore, the quality of the grindstone cannot be checked at the time when it is manufactured. Consequently, when the resinoid grindstone is broken or damages a workpiece during its use, it is difficult to find the cause of the damage.
Further, it is impossible to check the characteristic properties such as the thickness of a cutting edge, the length of a projecting edge of the blade, the size and density of abrasive grains of an electroformed grindstone blade mounted onto a base or a grinding stone mounted onto abase. Therefore, it is difficult to detect the cause of the damage of the grindstone blade or the grinding stone or the cause of a damage to the workpiece during its use.
Further, a user who uses a grindstone such as a resinoid grindstone and electroformed grindstone blade records information on the use time of the grindstone, the type of a processed workpiece, the abrasion of the grindstone, the amount of the residual grindstone, the life of the grindstone, the date when the grindstone has been used, the device used with the grindstone, the name of an operator who used the grindstone and the condition of a trouble for each grindstone. It is troublesome to store the use record of each grindstone, and it is difficult to record the above information surely.
SUMMARY OF THE INVENTIONIt is an object of the present invention to provide a grindstone tool, which enables the checking of the characteristic properties such as production conditions of a grindstone after use and the recording of the use record of the grindstone.
According to the present invention, the above object can be attained by a grindstone tool for performing predetermined processing on a workpiece, wherein
a radio IC tag from, and to, which information can be read, and written, without contact is embedded in the grindstone tool.
The above grindstone tool has resinoid grindstone manufactured by kneading abrasive grains with a bonding material, molding the kneaded product and baking it, and the radio IC tag is embedded in the resinoid grindstone. The above radio IC tag is embedded in the unused area of the grindstone.
The above grindstone tool comprises a base and a grindstone mounted on the base, and the radio IC tag is embedded in the base.
Data on the characteristic properties of the grindstone are recorded in the above radio IC tag. The use record of the grindstone is recorded in the above radio IC tag.
Since the radio IC tag from, and to, which information can be read, or written, without contact is embedded in the grindstone tool of the present invention, data on the characteristic properties of the grindstone and the use record of the grindstone stored in the radio IC tag can be read even after processing work is carried out by storing data on the characteristic properties of the grindstone and the use record of the grindstone in the radio IC tag. Therefore, when the grindstone tool is damaged or damages a workpiece during its use, the cause of the damage can be detected by reading and checking data on the characteristic properties and the use record of the grindstone stored in the radio IC tag.
BRIEF DESCRIPTION OF THE DRAWINGS
Preferred embodiments of the present invention will be described in detail hereinunder with reference to the accompanying drawings.
The grinding wheel 2 shown in
Data on the characteristic properties of the resinoid grindstone are stored in the radio IC tag 3 embedded in the recessed portion 221 of the grindstone 22 at the point when it is embedded in the grindstone 22. That is, as shown in
Since data on the characteristic properties of the resinoid grindstone are stored in the radio IC tag 3 embedded in the grindstone 22 as described above, even after grinding work is carried out by using the grinding wheel 2 mounting the grindstones 22, data on the characteristic properties of the resinoid grindstone stored in the radio IC tag 3 can be read. Therefore, when the grindstone 22 is damaged or damages the workpiece during its use, the cause of the damage can be detected by reading and checking data on the characteristic properties of the resinoid grindstone stored in the radio IC tag 3.
The use record of the grindstone such as the use time of the grindstone, the kind of the processed workpiece, the abrasion of the grindstone, the amount of the residual grindstone, the life of the grindstone, the date when the grindstone is used, the machine used with the grindstone, the name of an operator using the grindstone, the condition of a trouble, etc. can be stored in the radio IC tag 3 embedded in the grindstone 22 by a user or the control means of a grinding machine. Since the use record of the grindstone 22 is thus stored, when the grindstone 22 is damaged or damages the workpiece during its use, the cause of the damage can be detected by reading and checking the use record of the grindstone 22 stored in the radio IC tag 3.
A description is subsequently given of a second embodiment of the present invention with reference to
In the embodiment shown in
The annular grindstone blade 61 which is composed of a resinoid grindstone embedded with the above radio IC tag 3 is mounted onto a mounter 63 fitted onto a rotary spindle 62 constituting the spindle unit 6 of the cutting machine. That is, the annular grindstone blade 61 is mounted onto the mounter 63 by fitting the annular grindstone blade 61 onto the cylindrical tool mounting portion 613 of the mounter 63, fitting a sandwiching member 64 onto the mounting portion 613 and then, screwing a clamping ring 65 on a male screw portion formed on the mounter 63.
Since data on the characteristic properties of the resinoid grindstone are stored in the radio IC tag 3 embedded in the grindstone blade 61 as described above, even after the grindstone blade 61 is mounted on the spindle unit 6 of the cutting machine to carry out cutting work, data on the characteristic properties of the resinoid grindstone stored in the radio IC tag 3 can be read. Therefore, when the grindstone blade 61 is damaged or damages the workpiece during its use, the cause of the damage can be detected by reading and checking data on the characteristic properties of the resinoid grindstone stored in the radio IC tag 3.
By recording the use record of the grindstone blade 61 in the radio IC tag 3 embedded in the grindstone blade 61, the cause of the damage can be detected by reading and checking the use record stored in the radio IC tag 3 when the grindstone blade 61 is damaged or damages the workpiece during its use.
A description is subsequently given of a third embodiment of the present invention with reference to
The grinding wheel 2 shown in
A description is subsequently given of a fourth embodiment of the present invention with reference to
Claims
1. A grindstone tool for performing predetermined processing on a workpiece, wherein
- a radio IC tag from, and to, which information can be read, and written, without contact is embedded in the grindstone tool.
2. The grindstone tool according to claim 1, which has resinoid grindstone manufactured by kneading abrasive grains with a bonding material, molding the kneaded product and baking it, and the radio IC tag is embedded in the resinoid grindstone.
3. The grindstone tool according to claim 2, wherein the radio IC tag is embedded in the unused area of the grindstone.
4. The grindstone tool according to claim 1, wherein the grindstone tool comprises a base and grindstone mounted on the base, and the radio IC tag is embedded in the base.
5. The grindstone tool according to claim 1, wherein data on the characteristic properties of the grindstone are recorded in the radio IC tag.
6. The grindstone tool according to claim 1, wherein the use record of the grindstone is recorded in the radio IC tag.
Type: Application
Filed: Jul 14, 2005
Publication Date: Jan 19, 2006
Applicant:
Inventor: Kazuma Sekiya (Tokyo)
Application Number: 11/180,737
International Classification: B24B 49/00 (20060101);