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Tire Testing with Intact - for enhanced safety and quality |
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The shearography tire test systems from Steinbichler Optotechnik have been developed for the non-destructive testing of new tires in R&D and quality control, as well as for the inspection of tire carcasses in the retreading industry. The technical basis of the systems is the TV shearography system.
During the test cycle, a low pressure (e.g., 50 mbar pressure difference) is generated in the vacuum chamber, thereby inducing deformations which are caused by the expansion of air pockets occuring in faulty areas in a tire carcass. With the TV shearography technique - a holographic measurement method which reliably detects material deformations in the range of microns - faulty areas can be localized clearly and reproducably.
The Intact® systems by Steinbichler Optotechnik have successfully proven their functionality in the worldwide car-, truck-, and aircraft industries, as well as in the Formula 1 racing tire business.
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Phase-Shearography: Principle and Advantages
By phase shearography the interferogram is directly recorded by a CCD-videocamera. The phase image of the original state of the tire at normal pressure is stored in the image memory of the computer. The phase images of the deformed states of the tire at decreased pressure are subtracted from the stored image in real-time. Fault-typical deformations are displayed as interference fringes on the system monitor. The results can be stored for documentation on: hard disc of computer, CD, DVD, laserprinter, customer network.
- On-line evaluation, thereby enabling a direct quality
verdict of the casing immediately after test procedure
- No influence by vibration in comparison to conventional
interferometric methods
- No film material is consumed
- Compact, reliable set-up
- Operation by semi-skilled staff
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References Tire Testing (excerpt):
Bandag, USA • Black Star, France • Bridgestone Aircraft Tires, Belgium • Bridgestone, USA • Bridgestone, Japan • Cheng Shin Rubber, Taiwan • Cheng Shin Petrel, P.R. China • Cheng Shin Toyo Tire & Rubber, P.R. China • Continental Gummiwerke, Germany • Cooper Tire, USA • Covencaucho Industrias S.A., Venezuela • Deli Tire, Indonesia • Dunlop Aircraft Tyres Limited, Great Britain • Edler Reifen GesmbH, Austria • Emigholz, Germany • Fu-Chian Tire, Taiwan • Goodyear, Luxembourg • Goodyear, USA • Gummi Mayer, Germany • Kenda Tire, P.R. China/Taiwan • Lodge Tire, Great Britain • Marangoni Gomma, Italy • Maxxis International Co., Thailand • Michelin, USA • Michelin, France • Michelin Aircraft, France • Newera Equipment, Malaysia • Pirelli, Italy • Pneu Laurent, France • Reifen Ehrhardt, Germany • Reifen Ihle, Germany • Reifen John, Germany • Reifen Müller, Germany • Reiff, Germany • Shanghai Tyre & Rubber Co., P.R. China • Shenyang Peace Tire, P.R. China • Silverstone, Malaysia • Uniroyal Englebert Reifen GmbH, Germany • Vacu-Lug, Great Britain • Vredestein, Netherlands • Wilkerson, USA • Yokohama Rubber, Japan • Yu-San Tire, Taiwan • ...
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