1、December 2016DEUTSCHE 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!%_/%“260
2、1202www.din.deDIN 22258-3Chain connectors Part 3: Block type connectors,English translation of DIN 22258-3:2016-12Kettenverbindungsglieder Teil 3: Blockschlsser,Englische bersetzung von DIN 22258-3:2016-12Maillons de raccordement pour chanes Partie 3: Maillons de raccordement type bloc,Traduction an
3、glaise de DIN 22258-3:2016-12SupersedesDIN 222583:201205www.beuth.deDocument comprises 15 pagesDDIN-Normenausschuss Rundstahlketten (NRK)DIN-Sprachendienst01.17 DIN 22258-3:2016-12 2 A comma is used as the decimal marker. Contents Page Foreword . 3 1 Scope 4 2 Normative references 4 3 Terms, definit
4、ions and symbols . 5 4 Dimensions, designation . 6 5 Requirements 7 5.1 Material . 7 5.2 Manufacture. 7 5.3 Heat treatment . 8 5.4 Hardness . 8 5.5 Dimensions 8 5.6 Mechanical properties . 8 5.7 Surface condition . 8 6 Tests . 9 6.1 General 9 6.2 Lot size . 9 6.3 Sampling . 9 6.4 Dimension test 9 6.
5、5 Hardness test . 9 6.6 Tensile test . 10 6.7 Surface test . 10 7 Additional tests 10 7.1 Pendulum impact test 10 7.2 Fatigue test . 11 8 Evaluation . 11 9 Information for use . 11 9.1 Marking . 11 9.2 Test certificate 11 9.3 Design note 11 Annex A (informative) Inspection certificate . 12 Annex B (
6、informative) Bases for calculation . 13 B.1 Table 1 Dimensions . 13 B.2 Table 2 Nominal size-dependent mechanical properties 13 B.3 Table 3 Fatigue test; lower force, upper force . 14 Bibliography . 15 DIN 22258-3:2016-12 3 Foreword This standard has been prepared by the Working Committee NA 008-05-
7、05 AA Einzelteile fr Frderer of Normenausschuss Bergbau (Mining Standards Committee FABERG) in cooperation with Normenausschuss Rundstahlketten (Round Steel Link Chains Standards Committee NRK). This standard supersedes DIN 22258-3:2012-05. Attention is drawn to the possibility that some of the elem
8、ents 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 Chain connectors consists of the following parts: Part 1: Flat type connectors Part 2: Kenter type connectors Part 3: Block type c
9、onnectors The inspection certificate in Annex A and the bases for calculation in Annex B are informative. Amendments This standard differs from DIN 22258-3:2003-08 as follows: a) nominal size 42 151 has been omitted; b) nominal sizes 48 152 have been newly included; c) the conversion of hardness has
10、 been corrected; d) the standard has been editorially revised. Compared with DIN 22258-3:2012-05, the following corrections have been made: a) the text in Subclause 5.4 of the standard has been replaced as follows: Maximum 410 HV / 405 HBW 10/3 000 (conversion according to ISO 18265 1 281 MPa B.2 HV
11、/HBW). Previous editions DIN 22258-3: 1983-09, 1993-01, 2003-08, 2012-05 DIN 22258-3:2016-12 4 1 Scope This standard applies to block 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. Bl
12、ock type connectors can only pass over chain sprockets according to DIN 22256 in vertical position. It is therefore essential to observe the position of the block type connectors during installation. Block type connectors according to this standard shall not be used as lifting accessories, slings or
13、 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 references, only the edition cited applies. For undated references, the latest e
14、dition 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 Technical delivery conditions DIN 22252, Round steel link chains for use in co
15、ntinuous conveyors and winning equipment in mining DIN 22255, Flat link chains for use in continuous conveyors in mining DIN 22256, Chain sprockets for chain conveyors and coal winning equipment Dimensions, requirements, testing DIN 22258-1, Chain connectors Part 1: Flat type connectors DIN 50100, L
16、oad controlled fatigue testing Execution and evaluation of cyclic tests at constant load amplitudes on metallic specimens and components DIN 51220, Materials testing machines Generals for requirements and for verification and calibration of materials testing machines DIN EN 10204, Metallic products
17、Types of inspection documents DIN EN 10243-1, Steel die forgings Tolerances on dimensions Part 1: Drop and vertical press forgings DIN 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: Verificatio
18、n of testing machines DIN EN ISO 148-3, Metallic materials Charpy pendulum impact test Part 3: Preparation and characterization of Charpy 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 I
19、SO 6506-2, Metallic materials Brinell hardness test Part 2: Verification and calibration of testing machines DIN EN ISO 6506-3, Metallic 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
20、6507-2, Metallic materials Vickers hardness test Part 2: Verification and calibration of testing machines DIN EN ISO 6507-3, Metallic materials Vickers hardness test Part 3: Calibration of reference blocks DIN 22258-3:2016-12 5 DIN EN ISO 7500-1, Metallic materials Verification of static uniaxial te
21、sting machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system DIN EN ISO 7500-1 Supplement 3, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the
22、force-measuring system Supplement 3: General information for requirements, verification and calibration of fatigue testing machines DIN EN ISO 18265, Metallic materials Conversion of hardness values 3 Terms, definitions and symbols For the purposes of this document, the following terms, definitions
23、and symbols apply: 3.1 nominal size d t nominal diameter d (material diameter of the corresponding chain as a nominal value) and nominal pitch t (internal length of the block type connector as a nominal value) 3.2 connector thickness c thickness of a block type connector 3.3 internal width b1clear w
24、idth of a block type connector 3.4 external width b2 overall width of a block type connector 3.5 external length l overall length of a block type connector 3.6 radius r1external radius of a block type connector 3.7 radius r2transition radius of a block type connector 3.8 test force TF force to be ap
25、plied to a block type connector before the fatigue test DIN 22258-3:2016-12 6 3.9 breaking force BF maximum force which a block type connector withstands during the course of a static tensile test until fracture occurs 3.10 working force WF maximum static force which a block type connector is design
26、ed to withstand in operation 3.11 lower force Fulower force to be applied when subjecting a block type connector to a fatigue test 3.12 upper force Foupper force to be applied when subjecting a block type connector to a fatigue test 3.13 lot size specified quantity from which the test sample(s) is/a
27、re selected 3.14 batch defined quantity of base, semi-finished or finished products which shall be identical in shape and quality and have been produced during a defined manufacturing cycle 3.15 locking section section for the detachable connection in the block type connector 4 Dimensions, designati
28、on The block type connector does not need to conform to the illustration in Figure 1; only the specified dimensions shall be met. General tolerances: forging quality F according to DIN EN 10243-1 Designation of a block type connector with the nominal size 42 146: Block type connector DIN 22258 3 42
29、146 DIN 22258-3:2016-12 7 Table 1 Dimensions Dimensions in millimetres Nominal size Nominal pitch Width Connector thicknessaExternal length Radius d t t Tolerances Internal b1min. External b2 max. c max. l max. r1 max. r2 min. 26 92 92 0,9 28 75 28 213 74 13 30 108 108 1,1 32 87 32 252 87 15 34 126
30、126 1,3 37 99 36 297 103 17 38 126 126 1,3 41 111 40 290 101 19 38 137 137 1,4 41 111 40 322 112 19 38 146 146 1,5 41 111 40 348 120 19 42 137 137 1,4 45 115 46 314 110 21 42 146 146 1,5 45 115 46 341 119 21 48 152 152 1,5 52 127 56 347 122 24 See Annex B, Bases for calculation. aThe leg of the bloc
31、k type connector in its central section may correspond to the locking thickness and length of the flat type connector according to DIN 22258-1 of the same nominal size, taking into consideration the sprocket pass and installation properties. Figure 1 Block type connector 5 Requirements 5.1 Material
32、Block type connectors shall be manufactured from a material selected by the manufacturer to comply with the requirements of this standard (at least 23 MnNiMoCr5-4, material No. 1.6758 according to DIN 17115). Materials with deviating chemical compositions shall be agreed when placing the order. 5.2
33、Manufacture Block type connectors shall be drop forged. DIN 22258-3:2016-12 8 5.3 Heat treatment The block type connectors shall be hardened from a temperature range above the Ac3point with subsequent tempering in order to fulfil the properties specified in this standard. 5.4 Hardness Maximum 410 HV
34、 / 405 HBW 10/3 000 (conversion according to ISO 18265 1 281 MPa B.2 HV/HBW). 5.5 Dimensions After completion of the production process, the dimensions of the block type connectors shall be within the tolerances and limit values specified in Table 1. 5.6 Mechanical properties The breaking force shal
35、l reach at least the values specified in Table 2. In the fatigue test, 70 000 cycles shall be achieved per sample for all nominal sizes under the forces specified in Table 3. For block type connectors, the base material in the leg of non-aged normal samples with a V-notch shall exhibit an impact ene
36、rgy 57 J as the average value of three samples. No individual value shall be below 70 % of the stipulated average value (40 J). Table 2 Nominal size-dependent mechanical properties Nominal diameter Breaking force Working force d BF WF mm kN kN min. max. 26 850 531 30 1 130 707 34 1 450 907 38 1 820
37、1 130 42 2 220 1 380 48 2 900 1 810 Table 3 Fatigue test; lower force, upper force Nominal diameter Test force Lower force Upper force d TF FuFomm kN kN kN 26 637 53 266 30 848 71 354 34 1 090 91 454 38 1 360 114 567 42 1 660 139 693 48 2 170 181 905 5.7 Surface condition The block type connectors s
38、hall be free from scale, surface cracks and notches which impair their usability. DIN 22258-3:2016-12 9 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 tests will be destructive component tests on sampl
39、es of the finished block type connectors taken lot by lot in scale-free condition. Due to the change in friction behaviour in the crown area of corrosion protected block type connectors, the breaking force values and the number of fatigue cycles for these connectors shall be deemed to meet the requi
40、rements 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 block type connector of the same nominal size. Breaking forces and cycle numbers for hot-dipped galvanized block type connectors shall be agreed between the manufacturer
41、and user. The scope of 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 agreed when placing the order. 6.2 Lo
42、t size One lot comprises a manufacturing unit of 200 block type connectors. 6.3 Sampling The block type connectors shall be free from coatings which might cover possible defects. For the dimension test, three block type connectors shall be selected from one lot. For the hardness test, one block type
43、 connector shall be selected from one lot. For the tensile test, one block type connector shall be selected from one lot. For the fatigue and pendulum impact test, one block type connector shall be selected from each of five lots, however at least, one block type connector per batch. 6.4 Dimension t
44、est 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 testing of the hardness testing machine is subject to DIN EN ISO 6507-2 and D
45、IN 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. DIN 22258-3:2016-12 10 6.5.2 Procedure Vickers hardness tests shall be conduct
46、ed according to DIN EN ISO 6507-1. The hardness is determined on a cross-sectional area taken from the leg. Brinell hardness tests shall be conducted according to DIN EN ISO 6506-1. The hardness is determined on a cross-sectional area taken from the leg. 6.6 Tensile test 6.6.1 Testing machines The t
47、ests 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 autographic recorder to record a force-extension diagram. The material testing
48、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 the clamping components shall correspond to the geometry of the block type conn
49、ectors to be tested, e.g. by fitting a chain link of the corresponding chain on both sides of the block type connector. These chain links should preferably be of higher strength. The block type connectors shall be free from lubricants and anticorrosive agents, especially in the inner curves (contact points of the clamping components) and
