JPS55154459A - Flaw detecting method of steel product - Google Patents
Flaw detecting method of steel productInfo
- Publication number
- JPS55154459A JPS55154459A JP6205979A JP6205979A JPS55154459A JP S55154459 A JPS55154459 A JP S55154459A JP 6205979 A JP6205979 A JP 6205979A JP 6205979 A JP6205979 A JP 6205979A JP S55154459 A JPS55154459 A JP S55154459A
- Authority
- JP
- Japan
- Prior art keywords
- hardening
- 1aw1d
- sensors
- steel product
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title abstract 3
- 239000010959 steel Substances 0.000 title abstract 3
- 238000005336 cracking Methods 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 abstract 2
- 238000001514 detection method Methods 0.000 abstract 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
PURPOSE: To achieve the improvement in the accuracy of flaw detection and the improvement in production efficiency by mounting acoustoelectric transducers to the steel product and detecting the production of flaws based on the electric signals output by the acousto-electric transducers during surface hardening to the steel product.
CONSTITUTION: The gear GR mounted with the sensors 1aW1d comprising using acousto-electric transducers is put into a high-frequency hardening device and while it is being subjected to hardening, the circuits of the sensors 1aW1d and afterward are driven, whereby the flaw defection is accomplished. When hardening cracking occurred during the treatment, the elastic waves of a high level are produced and therefore the main amplifier output of the elastic waves taken into a main amplifier 6 through a channel selector 3 from the sensors 1aW1d exceeds the threshold level Th of a level discriminator 7, by which the plural pulse signals are output to a counter 8. The counter 8 counts these and when the count value reaches the set value, an alarm device 9 actuates to alarm the occurrence of hardening cracking.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6205979A JPS55154459A (en) | 1979-05-19 | 1979-05-19 | Flaw detecting method of steel product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6205979A JPS55154459A (en) | 1979-05-19 | 1979-05-19 | Flaw detecting method of steel product |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS55154459A true JPS55154459A (en) | 1980-12-02 |
Family
ID=13189173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6205979A Pending JPS55154459A (en) | 1979-05-19 | 1979-05-19 | Flaw detecting method of steel product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55154459A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009025007A (en) * | 2007-07-17 | 2009-02-05 | Seiko Epson Corp | Positioning device maintenance method and IC handler positioning device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52111782A (en) * | 1976-03-15 | 1977-09-19 | Gard Inc | Method and device for detecting flaw of welding by sound |
-
1979
- 1979-05-19 JP JP6205979A patent/JPS55154459A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52111782A (en) * | 1976-03-15 | 1977-09-19 | Gard Inc | Method and device for detecting flaw of welding by sound |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009025007A (en) * | 2007-07-17 | 2009-02-05 | Seiko Epson Corp | Positioning device maintenance method and IC handler positioning device |
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