1、UDC 621.851 : 621.852.13 : 620.1 DEUTSCHE NORMEN February 1973 e .- - -. 8 a I s! 3 a i 2 f 2 Z e m E .- a 8 r C * .- E b P b P Driving Elements Grooved Pulleys for V-belts Testing of Grooves I 2217 Sheet 2 rn Antriebselementei Keilriemenscheiben, Prfung der Rillen The measuring methods given here f
2、or testin those of the Recommendation ISO/R 255-1962 ?Geometrical inspection of grooves of pulleys for V-belts by Committee ISO/E 41) issued by the International Organization for Standardization (W) the groove angle and pitch diameter correspond with Dimensions in mm Testinn of uroove annle a The gr
3、oove angle a should be tested by means of a limit gauge accoring to Figure I corresponding with Figure 2. (For values for the other limit gauges see DIN 2217 sheet 1, February 1973 issue, Table I.) Figure I. Limit gauge for testing the groove angle: “he 1id.t gauge8 -0 to be marked in ccrdance with
4、the example illustrated for groove angle a - 38O. Testing of pitch diameter d, First, the outside diameter da rhould be found and the grooved pulley for V-belt tested for crlindrical fori. The pitch diameter dw is deterrined by meana of a depth gauge, e.g. in the manuer of Figure 3 and Figure 4: In
5、the case of multi-groove pulleys for V-belte all the grooves should be tes ted individually. 0og2000 Brake a, = da - 2c. The depth gauge adapters should be marked to conform with the belt pro- files. Figure 3. EeS Into the grooves to be tested place 2 cylindrical rollers of diameter d (see Table) co
6、rresponding to Figure 5 and Figure 6. Figure 5. Figure 6. Fi- 2. Terting of groove angle: Illuetratad, for example, for grooved pulleys for V-belte with grooe a - 38. Omin BI-z “max 2-7- Prom the distance k measured between the external tangential plane parallel with the axis of the grooved pulley f
7、or V-belt the pitch diameter is found as ti, 9 k - 2r. in the case of multi-groove plleys for V-belts all the grooves should be teated individually. Phe cylindrical rollers &re to be marked to conform with the belt profilerr. 1 At present atill circulating aa draft iinverkouf der Normbldner durch Beuth Verlag GmbH, Berlin 30 und Kan
