1、November 2011 Translation by DIN-Sprachendienst.English price group 7No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).IC
2、S 21.060.10; 97.220.20!$v-+“1831008www.din.deDDIN ISO 7795Cross-country skis Ski-binding screws Test methods (ISO 7795:2011)English translation of DIN ISO 7795:2011-11Langlaufski Skibindungsschrauben Prfung (ISO 7795:2011)Englische bersetzung von DIN ISO 7795:2011-11Skis de fond Vis de fixation Mtho
3、des dessai (ISO 7795:2011)Traduction anglaise de DIN ISO 7795:2011-11SupersedesDIN ISO 7795:1995-02www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.910.11 DIN ISO 7795:2011-11 A comma is used as the decimal marker. Contents Page Nat
4、ional foreword 3 1 Scope .5 2 Normative references .5 3 Terms and definitions 5 4 Apparatus 5 4.1 Test assembly .5 4.2 Drill and test jig.5 4.3 Pull-out apparatus 7 5 Procedure 7 5.1 Determination of driving torque7 5.2 Determination of stripping torque.8 5.3 Static pull-out test for one screw8 6 Te
5、st report .8 Bibliography .11 2 DIN ISO 7795:2011-11 National foreword This standard has been prepared by Technical Committee ISO/TC 83 “Sports and recreational equipment” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Sport- und Freizeit
6、gert (Sports Equipment Standards Committee), Working Committee NA 112-03-01 AA Ski- und Snowboardsportgerte. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. DIN shall not be held responsible for identifying any or all such patent
7、rights. This third edition cancels and replaces the second edition (DIN ISO 7795:1995-02), which has been technically revised. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 6506-1 DIN EN ISO 6506-1 ISO 7794 DIN ISO 7794 ISO 9119 DIN I
8、SO 9119 Amendments This standard differs from DIN ISO 7795:1995-02 as follows: a) the standard has been editorially revised; b) in Subclause 5.1.1, the penetration depth has been subdivided into 2 groups; c) in Subclauses 5.2.1 and 5.3.1, tolerance class H 12 has been deleted and replaced by a toler
9、ance of 015,0+for the diameter of the hole. Previous editions DIN ISO 7795: 1985-05, 1995-02 3 DIN ISO 7795:2011-11 National Annex NA (informative) Bibliography DIN EN ISO 6506-1, Metallic materials Brinell hardness test Part 1: Test method DIN ISO 7794, Cross-country skis Ski binding screws Require
10、ments DIN ISO 9119, Cross-country skis Binding mounting area Requirements and test methods 4 DIN ISO 7795:2011-11 Cross-country skis Ski-binding screws Test methods 1 Scope This International Standard specifies test methods for determining the mounting and fastening characteristics of screws that ar
11、e intended for fastening ski binding to cross-country skis. The requirements for ski-binding screws are specified in ISO 7794. The results of the test methods specified in this International Standard characterize only the properties of the screw. The results do not specify the actual mounting and fa
12、stening characteristics of different ski models, this information being specified in ISO 9119. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest ed
13、ition of the referenced document (including any amendments) applies. ISO 6506-1, Metallic materials Brinell hardness test Part 1: Test method ISO 7794, Cross-country skis Ski binding screws Requirements 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO
14、 7794 apply. 4 Apparatus 4.1 Test assembly The tests shall be performed on five test assemblies representative of material configurations, and with dimensions similar to those of a cross-section of the binding mounting area of a cross-country ski of a commonly used brand mark. 4.2 Drill and test jig
15、 A jig, as shown in Figure 1, shall be used for drilling the holes and also for determining the driving torque and the stripping torque. Used with a removable drill bushing, the jig shall ensure an exact drill hole of diameter , perpendicular to ( )0,1503,6 mm+the top surface of the test assembly. T
16、he jig shall also ensure that the screw is set and mounted perpendicular to the top surface of the test assembly. 5 DIN ISO 7795:2011-11 Dimensions in millimetres Key 1 drill jig bushing 2 drill jig 3 friction plate 4 centering pin to locate the friction plate aThickness according to the penetration
17、 depth needed. Drill and test jig The jig shall be equipped with a friction plate (see Figure 2), provided with conical or straight holes, depending on the type of screw head. It shall be made of steel with a Brinell surface hardness of 135 HBW 1/30/20, in accordance with ISO 6506-1. The countersink
18、 of the friction plate shall be machined with a precision tool, in order to ensure correct dimensions. The surface roughness shall be such that no vibration marks are visible. Dimensions in millimetres a) For screws with countersunk head b) For screws with flat head aThickness according to the penet
19、ration depth needed. Friction plate 6 DIN ISO 7795:2011-11 4.3 Pull-out apparatus Two rolls, of diameter 30 mm, and 250 mm apart, shall be used to support the test assembly together with an attachment plate. See Figure 3. Dimensions in millimetres a) For screws with countersunk head b) For screws wi
20、th flat head Pull-out apparatus 5 Procedure 5.1 Determination of driving torque 5.1.1 Using the drill jig (see 4.2), drill in the test assembly (see 4.1) a hole of diameter and ( )0,1503,6 mm+depth as follows: for group 1: 15,5 mm; for group 2: 11,5 mm. The hole shall not be tapped. 5.1.2 Drive the
21、screw to be tested into the hole, using the test jig and a suitable torque-wrench screwdriver. The driving speed shall be less than 0,25 turns per second. Read the driving torque after each half rotation. No lubrication shall be used during this procedure and the maximum penetration without contact
22、of the screw head and the friction plate shall be 9,5 mm. 7 DIN ISO 7795:2011-11 5.1.3 Record the maximum driving torque, in newton metres, as the largest measured value of the torque applied during the driving procedure. 5.1.4 Repeat the test, using at least ten different screws of the same type. 5
23、.2 Determination of stripping torque 5.2.1 Using the drill jig (see 4.2), drill a hole of diameter ( )0,1503,6 mm+and depth in the ( )0,5010,5 mm+test assembly (see 4.1). The hole shall not be tapped. 5.2.2 Use the test jig to mount and tighten the screws. Apply an increasing torque with the torque-
24、wrench screwdriver until a drop in the torque resistance indicates failure of thread. 5.2.3 Record the stripping torque, in newton metres, as the maximum value of the moment read on the torque-wrench screwdriver. 5.2.4 Repeat the test, using at least ten different screws of the same type. Use a new
25、hole of the friction plate for each test. 5.3 Static pull-out test for one screw 5.3.1 Using the drill jig (see 4.2), drill a hole of diameter ( )0,1503,6 mm+and depth in the ( )0,5010,5 mm+test assembly (see 4.1), ensuring that the holes are at least 50 mm apart. The hole shall not be tapped. 5.3.2
26、 Use the pull-out apparatus (see 4.3), which allows the introduction of the screw perpendicular to the surface of the test assembly to a penetration depth of 10,5 mm, and an axial load of the screw perpendicular to the surface of the assembly during the pull-out test. Drive and tighten the screw wit
27、h a tightening moment of 3 Nm. Position the test assembly so that the tested screw is equidistant from the support rolls. 5.3.3 Apply an axial load at a rate of 20 mm/min, until the screw is pulled from the test assembly. Record the maximum load required. 5.3.4 Repeat the test, using at least ten di
28、fferent screws of the same type. 6 Test report The test report shall include the following information: a) a reference to this International Standard; b) the name of the manufacturer or sign; c) designation of type; d) the maximum driving torque; e) the maximum stripping torque; f) the maximum pull-out strength; g) any deviation from this International Standard and the reasons for this deviation. 8 DIN ISO 7795:2011-11 9 Bibliography 1 ISO 9119, Cross-country skis Binding mounting area Requirements and test methods
