1、May 2012DEUTSCHE NORM English price group 10No 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).ICS 53.040.20!%F lower forc
2、e, upper force . 15 Bibliography . 16 DIN 22258-1:2012-05 3 Foreword This standard has been prepared by Working Committee NA 008-05-05 AA Einzelteile fr Frderer of Normenausschuss Bergbau (Mining Standards Committee FABERG) in cooperation with Normenausschuss Rundstahlketten (Round Steel Link Chains
3、 Standards Committee NRK). The standard supersedes DIN 22258-1:2003-04. 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 rights. The standard series DIN 22258
4、 Chain connectors consists of the following parts: Part 1: Flat type connectors Part 2: Kenter type connectors Part 3: Block type connectors The inspection certificate in Annex A and the bases for calculation in Annex B are informative. Amendments This standard differs from DIN 22258-1:2003-04 as fo
5、llows: a) nominal sizes 42 137 and 48 152 have been newly included; b) nominal size 42 151 has been omitted; c) the conversion of hardness has been corrected; d) the bases for calculation have been revised; e) the standard has been editorially revised. Previous editions DIN 22258-1: 1980-03, 1993-01
6、, 2002-10, 2003-04 DIN 22258-1:2012-05 4 1 Scope This standard applies to flat type connectors used to connect round steel link chains with the same pitch according to DIN 22252 and flat link chains with the same pitch according to DIN 22255. When using flat type connectors in conveyors with a close
7、d bottom run, care shall be taken that there is sufficient clearance between the external width of the flat type connector and the space in the bottom race. Flat type connectors are not allowed to be installed vertically in conveyors with flat link chains according to DIN 22255. Flat type connectors
8、 according to this standard shall not be used as lifting accessories, slings or loadbearing devices within the meaning of DIN 15003. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated r
9、eferences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. DIN 15003, Lifting appliances Load suspension devices, loads and forces Definitions DIN 17115, Steels for welded round link chains and chain components
10、 Technical delivery conditions DIN 22252, Round steel link chains for use in continuous conveyors and winning equipment in mining DIN 22255, Flat link chains for use in continuous conveyors in mining DIN 50100, Testing of materials Continuous vibration test Definitions, symbols, procedure, evaluatio
11、n DIN 51220, Materials testing machines Generals for requirements and for verification and calibration of materials testing machines DIN EN 10204, Metallic products Types of inspection documents DIN EN 10243-1, Steel die forgings Tolerances on dimensions Part 1: Drop and vertical press forgings DIN
12、EN ISO 148-1, Metallic materials Charpy pendulum impact test Part 1: Test method DIN EN ISO 148-2, Metallic materials Charpy pendulum impact test Part 2: Verification of testing machines DIN EN ISO 148-3, Metallic materials Charpy pendulum impact test Part 3: Preparation and characterization of Char
13、py V-notch test pieces for indirect verification of pendulum impact machines DIN EN ISO 6506-1, Metallic materials Brinell hardness test Part 1: Test method DIN EN ISO 6506-2, Metallic materials Brinell hardness test Part 2: Verification and calibration of testing machines DIN EN ISO 6506-3, Metalli
14、c materials Brinell hardness test Part 3: Calibration of reference blocks DIN EN ISO 6507-1, Metallic materials Vickers hardness test Part 1: Test method DIN EN ISO 6507-2, Metallic materials Vickers hardness test Part 2: Verification and calibration of testing machines DIN EN ISO 6507-3, Metallic m
15、aterials Vickers hardness test Part 3: Calibration of reference blocks DIN 22258-1:2012-05 5 DIN EN ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system DIN EN ISO 7500-
16、1 Supplement 3, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system Supplement 3: General information for requirements, verification and calibration of fatigue testing machines DIN
17、 EN ISO 18265, Metallic materials Conversion of hardness values 3 Terms, definitions and symbols For the purposes of this document, the following terms, definitions and symbols apply: 3.1 nominal size d t nominal diameter d (material diameter of the corresponding chain as a nominal value) and nomina
18、l pitch t (internal length of the flat type connector chain link as a nominal value) 3.2 connector thickness a thickness of a flat type connector shackle crown 3.3 internal width b1clear width of a flat type connector 3.4 external width b2overall outer dimension of a flat type connector as an extern
19、al enveloping circle 3.5 locking thickness c thickness of a flat type connector in the area of the detachable connection 3.6 locking length f section of a flat type connector with a locking thickness of c nominal thickness a 3.7 external length l overall length of a flat type connector 3.8 radius r
20、external radius of a flat type connector DIN 22258-1:2012-05 6 3.9 test force TF force to be applied to a flat type connector before the fatigue test 3.10 breaking force BF maximum force which a flat type connector withstands during the course of a static tensile test until fracture occurs 3.11 work
21、ing force WF maximum static force which a flat type connector is designed to withstand in operation 3.12 lower force Fulower force to be applied when subjecting a flat type connector to a fatigue test 3.13 upper force Foupper force to be applied when subjecting a flat type connector to a fatigue tes
22、t 3.14 lot size specified quantity from which the test sample(s) is/are selected 3.15 batch defined quantity of base, semi-finished or finished products which should be identical in shape and quality and have been produced during a defined manufacturing cycle 3.16 locking section section for the det
23、achable connection in the flat type connector 4 Dimensions, designation The flat type connector does not need to conform to the illustration in Figure 1 or 2; only the specified dimensions shall be met. General tolerances: forging quality F according to DIN EN 10243-1 Designation of a flat type conn
24、ector of nominal size 26 92: Flat type connector DIN 22258 1 26 92 DIN 22258-1:2012-05 7 Table 1 Dimensions Dimensions in millimetres Nominal size Connector thickness Nominal pitch Width Locking thickness Locking length External length Radius d t a Tolerances t Tolerances Internal External b1b2ac f
25、l r bmin. max. max. max. max. 2018 64 18 0,5 64 0,6 19 72 24 43 102 29 19 64,5 19 0,6 64,5 0,6 21 72 25 46 105 31 22 86 22 0,7 86 0,9 24 84 29 53 132 36 24 86 24 0,7 86 0,9 26 89 32 58 137 39 24 87,5 24 0,7 87,5 0,9 26 89 32 58 138 39 26 92 26 0,8 92 0,9 28 96 33 62 147 42 30 108 30 0,9 108 1,1 32 1
26、11 37 72 171 48 34 126 34 1,0 126 1,3 37 122 41 82 198 55 38 126 38 1,1 126 1,3 41 137 46 91 206 61 38 137 38 1,1 137 1,4 41 134 46 91 217 61 38 146 38 1,1 146 1,5 41 137 46 91 226 61 42 137 42 1,3 137 1,5 45 151 53 91 226 67 42 146 42 1,3 146 1,5 45 151 53 101 235 67 48 152 48 1,6 152 1,5 52 173 60
27、 116 253 77 See Annex B, Bases for calculation. a When using flat type connectors installed horizontally in twin chain assemblies, the centre distance of the chain strands shall be greater than the external width b2 of the flat type connectors. b The dimension r shall be maintained within the stated
28、 angular range of at least 130. DIN 22258-1:2012-05 8 Figure 1 Symmetrical flat type connector Figure 2 Asymmetrical flat type connector DIN 22258-1:2012-05 9 5 Requirements 5.1 Material Flat type connectors shall be manufactured from a material selected by the manufacturer to comply with the requir
29、ements of this standard (at least 23 MnNiMoCr 5-4, material No. 1.6758 according to DIN 17115). Materials with deviating chemical compositions shall be agreed when placing the order. 5.2 Manufacture Flat type connectors shall be drop forged. 5.3 Heat treatment The flat type connectors shall be harde
30、ned from a temperature range above the Ac3point with subsequent tempering in order to fulfil the properties specified in this standard. 5.4 Hardness Maximum 420 HV 10 / 414 HBW 10/3000 (conversion according to ISO 18265 1 311 MPa B.2 HV/HBW). 5.5 Dimensions After completion of the production process
31、, the dimensions of the flat type connectors shall be within the tolerances and limit values specified in Table 1. 5.6 Mechanical properties The breaking force shall reach at least the values specified in Table 2. In the fatigue test, 40 000 cycles shall be achieved per sample for nominal sizes 18 6
32、4 to 24 87,5 and 70 000 cycles for nominal sizes 26 92 under the forces specified in Table 3. For flat type connectors, the base material in the leg of non-aged normal samples with a V-notch shall exhibit a notched bar impact energy of 57 J as the average value of three samples. No individual value
33、of these shall be below 70 % of the stipulated average value (40 J). Table 2 Nominal size-dependent mechanical properties Nominal thickness Breaking force Working force a BF WF mm kN kN min. max. 18 361 254 19 403 283 22 540 380 24 642 452 26 754 531 30 1 000 707 34 1 290 907 38 1 610 1 130 42 1 970
34、 1 380 48 2 570 1 810 DIN 22258-1:2012-05 10 Table 3 Fatigue test; lower force, upper force Nominal thickness Test force Lower force Upper force a TF FuFomm kN kN kN 18 305 26 127 19 340 29 142 22 456 38 190 24 543 46 226 26 637 53 266 30 848 71 354 34 1 090 91 454 38 1 360 114 567 42 1 660 139 693
35、48 2 170 181 905 5.7 Surface condition The flat type connectors shall be free from scale, surface cracks or notches which impair their usability. 6 Tests 6.1 General The tests shall be carried out following an assessment of the total quantity. With the exception of the dimension test, these will be
36、destructive component tests on samples of the finished flat type connectors taken lot by lot in scale-free condition. Due to the change in friction behaviour in the crown area of corrosion-protected flat type connectors, the breaking force values and the number of fatigue cycles for these connectors
37、 shall be deemed to meet the requirements if the breaking force is 90 % of the breaking force BF and the cycle number is 90 % of the cycle number of the scale-free flat type connector of the same nominal size. Breaking forces and cycle numbers for hot-dipped galvanized flat type connectors shall be
38、agreed between the manufacturer and user. The scope of the tests covers the dimension test according to 6.4, the hardness test according to 6.5, and the tensile test according to 6.6. Any further tests such as the pendulum impact test according to 7.1 or the fatigue test according to 7.2 shall be ag
39、reed when placing the order. 6.2 Lot size A single lot comprises a manufacturing unit of 200 flat type connectors. 6.3 Sampling The flat type connectors shall be free from coatings which might cover possible defects. For the dimension test, three flat type connectors shall be selected from a single
40、lot. DIN 22258-1:2012-05 11 For the hardness test, one flat type connector shall be selected from a single lot. For the tensile test, one flat type connector shall be selected from a single lot. For the fatigue and pendulum impact tests, one flat type connector shall be selected from each of five lo
41、ts, however at least one flat type connector per batch. 6.4 Dimension test It shall be checked that the dimensions are as specified in Table 1. 6.5 Hardness test 6.5.1 Testing machines Vickers hardness tests shall be conducted with hardness testing machines according to DIN EN ISO 6507-2. The testin
42、g of the hardness testing machine is subject to DIN EN ISO 6507-2 and DIN EN ISO 6507-3. Brinell hardness tests shall be conducted with hardness testing machines according to DIN EN ISO 6506-2. The testing of the hardness testing machine is subject to DIN EN ISO 6506-2 and DIN EN ISO 6506-3. 6.5.2 P
43、rocedure The Vickers hardness tests shall be conducted according to DIN EN ISO 6507-1. The hardness is determined on a cross-sectional area taken from a connector shackle. The Brinell hardness tests shall be conducted according to DIN EN ISO 6506-1. The hardness is determined on a cross-sectional ar
44、ea taken from a connector shackle. 6.6 Tensile test 6.6.1 Testing machines The tests shall be conducted with material testing machines according to DIN EN ISO 7500-1, class 1. The testing of the material testing machines is subject to DIN 51220. The material testing machine shall be equipped with an
45、 autographic recorder to record a force-extension-diagram. The material testing machines shall be used only within the measurement range given by the test certificate. 6.6.2 Procedure The tensile force of the testing machine shall be transmitted by means of rigid clamping components. The geometry of
46、 the clamping components shall correspond to the geometry of the flat type connectors to be tested, e.g. by fitting a chain link of the corresponding chain on both sides of the flat type connector. These chain links should preferably be of higher strength. The flat type connectors shall be free from
47、 lubricants and anticorrosive agents, especially in the inner curves (contact points of the clamping components) and tenon joints, since this could otherwise falsify the test results. Make sure the sample is fitted perfectly. Always align the sample to prevent unbalanced, additional bending loads. 6
48、.6.3 Breaking force The sample shall be loaded until fracture occurs. 6.7 Surface test Suitable test methods shall be used to verify that the surface of each flat type connector is free of cracks after the heat treatment. DIN 22258-1:2012-05 12 7 Additional tests 7.1 Pendulum impact test 7.1.1 Sampl
49、e production A standard sample with a V-notch according to DIN EN ISO 148-1 shall be taken from the leg of the flat type connector. 7.1.2 Procedure The pendulum impact test shall be conducted using a pendulum impact testing machine according to DIN EN ISO 1482. The DIN EN ISO 148 series of standards shall apply for this test. 7.2 Fatigue test 7.2.1 Testing machine The test shal
