GB/T 18506-2013 PDF EnglishUS$150.00 · In stock · Download in 9 seconds
GB/T 18506-2013: Uniformity test method for motor vehicle tyres Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 18506: Historical versions
Similar standardsGB/T 18506-2013: Uniformity test method for motor vehicle tyres---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT18506-2013NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 83.160.10 G 41 Replacing GB/T 18506-2001 Uniformity test method for motor vehicle tyres ISSUED ON: DECEMBER 31, 2013 IMPLEMENTED ON: SEPTEMBER 01, 2014 Issued by: General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People’s Republic of China. Table of ContentsForeword ... 3 1 Scope ... 5 2 Normative references ... 5 3 Terms and definitions ... 5 4 Test equipment and its requirements ... 7 5 Test conditions ... 10 6 Test steps ... 12 7 Test record ... 13 Uniformity test method for motor vehicle tyres1 ScopeThis Standard specifies the test method for measuring the uniformity of passenger car tyres and truck tyres on the tyre uniformity test machine (drum method). This Standard applies to passenger car tyres and truck tyres (including mini truck tyres, light truck tyres).2 Normative referencesThe following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document. GB/T 2977, Size designation, dimensions, inflation pressure and load capacity for truck tyres GB/T 2978, Size designation, dimensions, inflation pressure and load capacity for passenger car tyres GB/T 6326, Tyre terms and definitions GB 9743, Passenger car tyres GB 9744, Truck tyres3 Terms and definitionsTerms and definitions determined by GB/T 6326 and the following ones are applicable to this document. 3.1 Uniformity Under static and dynamic conditions, the constant performance of tyre circumference characteristics, including tyre mass unbalance, dimensional deviation and force fluctuations. Note: This Standard only refers to the tyre force variation. The maximum peak-to-peak value of the lateral force variation of first harmonic. 3.7 Test drum Rotating cylindrical load wheel.4 Test equipment and its requirements4.1 General requirements 4.1.1 The tyre uniformity test equipment shall include: a) Principal axis, which is equipped with an adjustable width rim; the tyre can be simply installed on the rim; b) Test drum, whose axis is parallel to the principal axis; c) The equipment shall have a device that has two rotation directions of clockwise and counterclockwise; d) The equipment shall have a device that can quickly inflate and deflate tyres and control the air pressure during tyre operation; e) A device that loads up the tyre, which can keep the wheelbase between the tyre and the drum constant during the detection process; f) When the tyre and drum rotate at a specified speed, there is a device for measuring radial force and lateral force; g) The device that is used to identify the test results. 4.1.2 The parallelism between the principal axis and the rotation axis shall be kept below: a) If it is the equipment that is equipped with a type-A drum (outer diameter of 854 mm), it is 0.25 mm/m when it is loaded with a radial force of 10 kN and a lateral force of 500 N; b) If it is the equipment that is equipped with a type-B drum (outer diameter of 1600 mm), it is 0.5 mm/m when it is loaded with a radial force of 40 kN and a lateral force of 2 kN; 4.1.3 During the measurement, the equipment shall have the ability to rotate the tyre at a speed of not less than 10 r/min and not more than 250 r/min. 4.1.4 For the device that is used to measure radial force and lateral force variations, the accuracy deviation within the range shall meet the following requirements: 5.6.2 If the test tyre is partially deformed due to storage, packaging and transportation, appropriate preheating repair can be used to reduce the deformation to an acceptable level. 5.6.3 In order to ensure that the tyre is properly seated on the rim, the surface of the tyre bead or rim bead seat or both may be coated with a suitable lubricant.6 Test steps6.1 Select and adjust the rim of the test machine according to the provisions of 4.3. 6.2 Install the tyre on the rim; inflate to the test pressure that is specified in 5.3. 6.3 Rotate the principal axis of the test machine at the speed that is specified in 5.5; move the test drum against the tyre until it reaches the specified load; keep the distance between the principal axis and the drum axis constant; make the principal axis rotate clockwise and counterclockwise for more than two cycles, respectively; record the following data after measurement: a) Radial force variation RFVCW; b) Lateral force variation LFVCW; c) Lateral force deviation LFDCW; d) Radial force variation RFVCCW; e) Lateral force variation LFVCCW; e) Lateral force deviation LFDCCW; g) Radial force of first harmonic RFV1H; h) Lateral force of first harmonic LFV1H; i) Conicity CON; j) Ply steer PLY. 6.4 Move the test drum away from the tyre; deflate the tyre; remove the tyre from the rim. 6.5 Mark the test tyres if necessary. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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