DIS稿与CD稿的差异汇总.doc

ISO 11891的DIS稿与CD稿差异汇总表No章/节段/句DIS稿CD稿11一段This international standard , shapes, spring construction . for hot coiled, quenched and tempered helical compression springs that are made from hot coiled round section steel bar.This standard specifies the materials, shapes, spring characteristics, tolerances, manufacturing requirements and test methods for common helical compression springs that are made from hot coiled round section steel bar and then quenched and tempered. 2二段These specifications only apply to springs with following limit values.The following limit values apply to springs made to this standard.34.1一段Unless otherwise agreed by the purchaser and supplier, springs should be made from the material conforming to ISO 683-14.Springs shall be made from the material specified in ISO 683-14. It is permitted to use alloys different to those defined in ISO 683-14; in this case, agreement between the purchaser and the supplier shall be made in advance.44.2.1一段The tolerances of the dimensions of hot rolled bars shall meet the requirement of ISO 1035-4, unless otherwise Tolerances of the dimensions and shapes of hot rolled bars specified shall be defined in accordance with ISO 1035-4, others 54.2.2一段The tolerances of the dimensions and shapes of cold-worked surface bars specified shall meet the requirement of Table 2, unless otherwise Tolerances of the dimensions and shapes of cold-worked surface bars specified shall be defined in accordance with Table 2, others 6Table 2X d XX to X75.1一段一句 should shall 8二句If several springs are to be nested together, the direction of helix alternates by spring, with the outside spring usually being right-handed.If several springs are nested together, the direction of helix changes by turns, with the outside spring usually being right-handed. 9三句 should shall 105.2一段, this type should apply to both ends of the spring., this type shall apply to both ends on the spring.11Fig.1126一段The length at a specified load or the load at a specified length shall be agreed between purchaser and supplier according to 6.1 or 6.2. The spring characteristics in this specification only applyN/A13二段The spring characteristics in this specification only apply to springs with linear characteristic. The characteristics for springs with nonlinear characteristic shall be agreed between purchaser and supplier.N/A146.1一段一句 should shall 15二句 should shall 16三句The deflection under specified load shall be within the range of 20 % to 80 % of the nominal total deflection.However the specified lengths at load shall correspond to deflections between 20 % and 80 % of total deflection.176.2一段一句 should shall 18二句 should shall 19三句The deflection under specified length shall be within the range of 20 % to 80 % of the nominal total deflection.However the specified load at length shall be between 20 % and 80 % of total deflection. However the specified load at length shall correspond to deflections between 20 % and 80 % of total deflection.206.3一段 should shall 217一段一句 should shall 22二句 should shall 23三句 should ISO 80000-1. shall ISO 31-0.247.1一段二句 should shall 257.2一段一句 should shall 26二句 should shall 27Table 4Grade 1: min 2,0; Grade 2: min 2,5;Grade 1: min 1,5; Grade 2: min 2,0;287.3一段二句 should shall 297.4一段一句The perpendicularity shall be measured for two ends, or perpendicularity and parallelism for one end. There are two methods of two ends perpendicularity or one end perpendicularity plus parallelism can be chosen for controlling the tolerance of spring shape.30二句When the spring is standing on any end for measurement, the measured result shall meet the requirement of this specification.31二段一句Normally The perpendicularity are not specified for spring with end types a and d wont be specified.Normally the perpendicularity of the outer spring and end plane for spring end types a, d wont be specified.32二句For spring with end types b, c, e and f, the perpendicularity shall be less than the limit specified in Table 5.The tolerances for perpendicularity of the outer spring and end plane for spring end types b, c, e, and f shall be defined in accordance with Table 5.337.5一段一句If perpendicularity for two ends is specified, the parallelism shall not be required.For the heavy weight spring, one end perpendicularity plus parallelism can be specified.34二句For heavy weight spring, one end perpendicularity plus parallelism may be specified.If the perpendicularity of both ends is specified, the parallelism wont be specified.35三句 of the two ends is not required for spring with end types a, d.Normally the parallelism of both the end coils face for spring end types a, d wont be specified.36四句For spring with end types b, c, e and f, the parallelism shall not be more than the limit specified in Table 6.The tolerances for parallelism of both the end coils face for spring end types b, c, e, and f shall be defined in accordance with Table 6.377.6一段When the spring is compressed to a height representing a deflection of 80 % of the normal total deflection none of the active coils should be in For a spring of uniform pitch, when 80 % of the total deflection has been compressed, the active coils shall not come into 387.7一段二句The following formulas calculate the maximum solid length of springs for specified end types can be calculated by following formulas (see EN 13906-11).The following formulas calculate the maximum solid length of springs with specified end types when necessary 1.39二段a) b, c:a) b, e:40第六段c) spring with end type e and f shall c) spring end type c and f shall 417.8一段In general, there are three grades of tolerance based on spring characteristics for different application.In general, the tolerances of spring dimensions and characteristics have been graded into three classes of permissible variation for spring features.427.8.1一段 should shall 437.8.2一段 should shall 44Table 8min. s x Rmin. sR457.8.3一段一句 should shall 46二句For high accuracy application, 10 % R may be specified.However, on account of the character of use, the tolerances up to 5 % may be specified for springs requiring higher accuracy.47三句 should shall 48四句 should shall 498.1一段 should shall 508.2一段一句 should shall 51二句The guidance values for tensile strength and hardness for quenched and tempered springs and test pieces should be in accordance with the value given in ISO 683-14 and ISO 18265.Refer to Table A.1 of Annex A for specified hardness of springs for different materials.52三句When hardness range or spread is specified, it should be When hardness limits are specified, the total range or spread shall be 538.3一段一句of springs; especially the decarburization of the springs under dynamic loading should be minimized.of springs, the depth shall be agreed between the purchaser and the supplier as requested for the individual use of the spring and the nature of the spring material.54二句The depth should be agreed between the purchaser and the supplier based on spring application and the nature of the spring material.55N/AFor dynamic spring, should avoid decarburization.568.4一段Unless otherwise agreed, The grain should Unless otherwise agreed, the grain shall 578.5一段 should shall 588.6一段 and/or grinding should should or grinding shall shall 598.7一段一句 should shall 60二句 should shall 618.8一段When setting is required, should When setting is performed, shall 628.9一段一句 should shall 63二句When specific coatings or plating is required for certain environmental conditions, it should be The application of special coatings, plating, etc. for protection in environmental conditions shall be 64三句 should shall 659一段一句Full inspection or sampling inspection of the spring should be applied according to the lot size and requirement of the purchaser.In accordance with the number of lots or purchasers requirements, sampling shall be agreed between the purchaser and the supplier.66二句Sampling method should be agreed between the purchaser and the supplier.679.1CD/9.3一段二句The spring length should be measured by a device with 0,02 mm accuracy.N/A68CD稿注N/ANotes: the maximum test load means the load which will not cause plastic deformation of the spring.699.2.1标题Dimension inspectionDimension inspection709.2.2标题Perpendicularity inspectionPerpendicularity inspection71一段一句 should shall 72二句 should shall 73三句If the parallelism measurement is not implemented, perpendicularity for both ends should be measured and maximum value shall be taken as a result.If the parallelism wont be tested, the perpendicularity of both ends should be tested, and take the largest value.74Key1 m