JASO T203-1985 英文版 摩托车轻合金车轮1.pdf
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1、JAPANESE AUTOMOBILE STANDARD JASO T 203-85 Light Alloy Wheels for Motorcycles 1 . Scope 3. Types This Standard specifies light alloy wheels for motor- cycles (including motorcycles equipped with sidecars and motor driven cycles) (hereinafter referred to as “light alloy wheels“). Remark: In this stan
2、dard, units and numerical values are based on SI (International System of Units), while units and numerical values given in are customary units system, and are given for reference. The types of the light alloy wheels shall be as follows: Light alloy wheels of which the rims and spokes (or discs) are
3、 molded in single units. Light alloy wheels of which the rims are made of light alloy, and the spokes (or discs) of light alloy or steel; which are then assembled. Wire (1) Unit construction type (2) Composite construction type spoke type shall, however, be excluded. 2 . Purpose This standard aims t
4、o establish and standardize the quality of light alloy wheels in order to ensure driving 4. Nomenclature of Each Part safety. The nomenclature of each part shall be pursuant to Fig. 1 (shown as an example). Applicable Standards: JASO C 603-80 JIS D 4203 JIS D 4215 JIS H 0321 JIS H 0522 JIS H 4000 JI
5、S H 4100 JIS H 4140 JIS H 4201 JIS H 4204 JIS H 5202 JIS H 5203 JIS H 5302 JIS H 5303 JIS Z 2343 Steel Disc Wheels for Automobiles Dimensions of Tires for Motorcycles and Scooters Rims for Motorcycles and Scooters General Rules for Inspection of Nonferrous Metal Materials Methods of Radiographic Tes
6、t and Classification of Radiographs for Aluminium Castings Aluminium and Aluminium Alloy Sheets and Plates, Strip and Coiled Sheets Aluminium and Aluminium Alloy Extruded Shapes Aluminium and Aluminium Alloy Forgings Magnesium Alloy Sheet and Plate MagnesiumAlloy Extruded Shapes Aluminium Alloy Cast
7、ings Magnesium Alloy Castings Aluminium Alloy Die Castings Magnesium Alloy Die Castings Methods for Liquid Penetrant Testing and Classification of Indication 1 JAS0 T 203-85 Fig. 1 Unit Construction Type 2 w Composite Construction Type of each part Rim diameter Valve hole JAS0 T 203-85 Lateral defle
8、ction 1 .o I 5. Performance 1.2 5.1 Durability Against Bending Moment After being subjected to at least IO5 cycles of the test according to 11.1, there shall be no evidence of harmful cracks, significant deformation or any abnor- mal looseness at joints. 5.2 Durability Against Radial Load After bein
9、g subjected to at least 5x10 cycles of the test specified in 11.2, there shall be no evidence of harmful cracks, significant deformation or any abnor- mal looseness at joints of the light alloy wheel. 5.3. Impact Resistance After being subjected to the impact test in 11.3, there shall be no evidence
10、 of harmful cracks, significant deformation, any abnormal looseness at joints, or any sudden air leakage (l). Note: (I) Sudden air leakage shall mean the case when the case when the tire pressure drops by more than 50% in less than 30 sec. 5.4 Durability Against Tortional Moment After being subjecte
11、d to at least 10 cycles of the test according to 11.4, there shall be no evidence of harm- ful cracks, significant deformation or any abnormal looseness at joints. 5.5 Airtightness of Rims Regarding light alloy wheels for tubeless tires, pres- surized air supplied by the method described in 11.5 sha
12、ll not leak out through the rim. 6. Dimensions 6.1 Profilesof Rims The dimensions of the profiles of the rims shall be pursuant to JIS D 4215 (Rims for Motorcycles and Scooters). 6.2 Circumference of Rim Bead Seats The circumferential dimensions of the rim bead seats shall be pursuant to JIS D 4215.
13、 6.3 Deflections The maximum values of vertical and lateral deflections shall be as shown in Table. Table Unit: mm Com posi te Unit 7. Appearance (1) There shall be no cracks, pinholes, shrinkage cavities, scratches, etc. which may develop into harmful defects in terms of strength. (2) The tire moun
14、ting surface and the circum- ference of the valve hole of the rim shall not have such shapes and surface conditions as will harm the functions of the tire, tube, and valve. (3) Light alloy wheels for tubeless tires shall not have any defects, such as pinholes, which are harmful for airtightness of t
15、he rims. 8. Materials The materials of the light alloy wheels shall be, in principle, pursuant to the following standards, and in cases of those made of magnesium alloy, rust proof- ing shall also be applied to the surfaces: JIS H 4000 (Aluminium and Aluminium Alloy Sheets and Plates, Strip and Coil
16、ed Sheets) or equivalents JIS H 4100 (Aluminium and Aluminium Alloy Extruded Shapes) or equivalents JIS H 4140 (Aluminium and Aluminium Alloy Forgings) or equivalents JIS H 4201 (Magnesium Alloy Sheet and Plate) or equivalents JIS H 4204 (Magnesium Alloy Extruded Shapes) or equivalents JIS H 5202 (A
17、luminium Alloy Castings) or equi- valents JIS H 5203 (Magnesium Alloy Castings) or equi- valents JIS H 5302 (Aluminium Alloy Die Castings) or equivalents JIS H 5303 (Magnesium Alloy Die Castings) or eq uiva letn s 9. Heat Treatment Heat treatment shall be pursuant to the standards for materials pres
18、cribed in 8. 3 JAS0 T 203-85 IO. Mechanical Properties Mechanical properties shall be pursuant to the stand- ards for materials prescribed in 8. 11.1.3 Test Conditions The bending moment to be applied in 11.1.2 shall be determined by the following equation: M = Sm x p x W x r Sm: Coefficient 0.7 p :
19、 Friction coefficient between tire and road 0.7 W : The maximum design load of any motorcycle tire which can be applied to the light alloy wheels concerned (pur- suant to JIS D 4203, etc.). In case of ensuring loads for a specific tire, W shall be the maximum design load of that tire. However, in th
20、e case when the wheel is restricted to limited vehicle (hereafter referred to as “limited use“), the maximum value of the static wheel reaction force of that vehicle shall be applicable. N (kgf) i - : In case of applying the maximum value of the maximum design load of the tire for motorcycles, the s
21、tatic loaded radius (pursuant to JIS D 4203, etc.) shall be applicable. In case of ensuring the load of a specific motorcycle tire, the static loading radius of the tire of the motor- cycle concerned shall be applicable. In case of a limited use, however, the maxi- mum value of the static loading ra
22、dius of the motorcycle tire designated to the vehicel may be applicable. m where, M : Bending moment Nam kgf-m 11. Tests I1 . I Rotation Bending Fatigue Test 1 1 . 1 . 1 Test Equipment The test equipment shall be so constructed that it is able to provide a constant bending moment to the center of th
23、e light alloy wheel which rotates with a constant velocity. An example of such equipment is shown in Fig. 2. 1 1 . 1 . 2 Test Procedure The light alloy test wheel shall be fixed to a rotary disc of the tester at the wheel rim flange; a loading arm with sufficient rigidity shall be attached to the wh
24、eel in the same method as the wheel is normally attached to a vehicle as shown in Fig. 2; and the wheel shall be rotated with a bending moment applied. Fig. 2 Fastening 4 JAS0 T 203-85 - 11 . I . 4 Retest Retest shall be carried out in cases where abnormal changes occur in the test conditions. 11.2
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