1、GM DAEWOO Auto & Technology EDS Engineering, GM DAEWOO Auto & Technology Standards ABRASION RESISTANCE TEST OF SAFETY GLASS FOR AUTOMOBILES Do Not Use on New Programs. Being Replaced by GMW3136 EDS-T-3513 ISSUED DATE: 1995. 01. 06 REVISED DATE: 2008. 10. 23 VERSION: 4 (Superceded) EDS-T-3513ABRASION
2、 RESISTANCE TEST OF SAFETY GLASS FOR AUTOMOBILES PAGE: 1/2 ISSUED DATE: 1995. 01. 06 REVISED DATE: 2008. 10. 23 VERSION: 4 GM DAEWOO Auto & Technology Note: This standard may be applied only for current project. It is Superceded for all future projects and replaced by GMW3136. 1. PURPOSE This standa
3、rd specifies whether the safety glass has a certain min. resistance to abrasion. 2. SCOPE This standard applies to the safety glass (laminated glass with a high molecular film) for the front glass of automobiles 3. TEST PIECE (SPECIMENS) 3.1. Laminated glass : Flat laminated glass measuring approx.
4、44manufactured by the same process as that for the product. 3.2. Tempered glass : Flat tempered glass measuring approx. 44cut from the same material, shall be subjected to the test. 4. APPARATUS AND INSTRUNMENTS 4.1. Abrading Instrument 4.1.1. Turntable : Rotate speed : 705 RPM The load applied to t
5、he specimen by each abrasive wheel shall be 500gf 4.1.2. Abrasive wheel The abrasive wheels, each 45 50mm in diameter and 12.5mm in thickness, are made of medium-hard rubber in which abrasives are imbedded. The hardness of the abrasive wheel shall be 725 IRHD. 4.2. Haze meter 4.2.1. Light source : T
6、he light source shall be an incandescent lamp lighting at a color temperature of 285650K. 4.2.2. Light source part : light beam 71mm 4.2.3. Receiver : An integrating sphere provided with reflectance standard. 5. PROCEDURE 5.1. Clean the specimen 5.2. Calculate the haze values of the specimen before
7、abrasion by use of a hazemter, at four equally spaced points of that area which will be a trick of the abrasive wheels, and average the values thus obtained. EDS-T-3513ABRASION RESISTANCE TEST OF SAFETY GLASS FOR AUTOMOBILES PAGE: 2/2 ISSUED DATE: 1995. 01. 06 REVISED DATE: 2008. 10. 23 VERSION: 4 G
8、M DAEWOO Auto & Technology 5.3. Rotating a abrasive wheel with Refacing Disk in 25cycles, and clean the wheel by use of a brush. 5.4. Place the specimen on the turntable of the abrading instrument so that the outer side on vehicle coincides with the abrading face. 5.5. Apply a load of 500fg to each
9、abrasive wheel, and allow the specimen to be abraded by 1000 turn rotation 5.6. Clean the specimen after abrasion. 5.7. Calculate the haze values of the specimen after abrasion by use of the hazemeter at four equally spaced points on the track of the abrasive wheels, and average the values the obtai
10、ned. 6. CALCULATION OF THE HAZE VALUE Total transmittance Tt(%) = (T2/ T1) 100 Diffuse transmittance Td (%) = (T4- T3(T2/T1) /T1100 Haze value (%) = (Td / Tt) 100 Condition of measurement Classification of measured value With specimen With light-trap With reflectance standard Incident light T1NO NO
11、YES Total light transmitted by specimen T2YES NO YES Light scattered by instrument T3NO YES NO Light scattered by instrument and specimen T4YES YES NO 7. RESULT OF THE TEST 7.1. Obtain the haze value when abraded by subtracting the haze value before abrasion from that after abrasion. 7.2. Three specimens shall be tested by the abrasion resistance test, and all the specimens shall be 2% max. of Haze value. 8. REFERENCE KSL 2007 Safety glasses for road vehicles
