1、Klass.-Nr./Class. No 61 25 3 July 2007 Square Weld Nut High Type, Large Wrench Size VW 60442 Konzernnorm Key words: nut, weld nut, square nut, square weld nut Continued on page 2 to 8 Fachverantwortung/Responsibility Normung/Standards (EKTC, 1733) Ratmann Mrs. Ratmann Tel.: +49-5361-9-27994 Terlinde
2、n Confidential. All rights reserved. No part of this document may be transmitted or reproduced without prior permission of a Standards Department of the Volkswagen Group. Parties to a contract can only obtain this standard via the B2B supplier platform . VOLKSWAGEN AG Norm vor Anwendung auf Aktualit
3、t prfen / Check standard for current issue prior to usage.Version- 09.06Contents Page 1 Scope 1 2 Requirements 2 3 Dimensions . 2 4 Designation . 3 5 Technical Supply Specifications 4 6 Identification 5 7 Drawing notes . 5 8 Connecting dimensions. 6 9 Referenced standards. 6 Appendix A (informative)
4、 . 7 Preface Incorporation of DIN ISO 4759-1, May 1980 issue, into a company standard is planned. Until such time as this is implemented specifications shall refer to this standard. Modifications The following changes have been made as compared to Volkswagen standard VW 60442, 2003-07: Section 5.2,
5、Quenching and tempering to (295 to 353) HV 30 changed to (272 to 353) HV 30 Section 5.5.1, Surface c350 changed to surface c340 Section 3, Figure 1, Detail R, dimension 120-10 changed to 120-30 Section 1.2, C-content in sheets changed from 0,15% to 0,20% Section 5.3, DIN EN ISO 4759-1 changed to DIN
6、 ISO 4759-1 Technical Supply Specifications revised Appendix A changed from normative to informative Previous issues 1972-02, 1974-05, 1974-10, 1991-07, 2003-07 1 Scope This standard specifies requirements for square weld nuts with metric coarse thread from M5 to M8 in product class A. The English t
7、ranslation is believed to be accurate.In case of discrepancies the German version shall govern. Numerical notation according to ISO practice (seeVW 01000). QUELLE: NOLISPage 2 VW 60442: 2007-07 1.1 Note for application 1.1.1 Design Weld nuts according to this standard are suitable for threaded joint
8、s with bolts of property classes 8.8 according to DIN EN ISO 898-1. Quenched and tempered weld nuts according to this standard are suitable for threaded joints with bolts of property classes up to and including 10.9 according to VW 60250. This also applies for assembly beyond the elastic limit. See
9、also Appendix A. The Small Parts Catalog by Volkswagen Design Engineering is to be referred to.1)1.1.2 Manufacturing Weld nuts according to this standard are joined using resistance projection welding. See also Appendix A. 1.2 Sheets and sheet thicknesses Flawless welding can only be ensured with sh
10、eets having a C content of 0,20 %. Consultation has to take place with the responsible engineering department of Volkswagen AG (Design, Laboratory) if the steel is of a different quality. See Table 4 for data on sheet thicknesses. 2 Requirements Square weld nuts according to VW 60442 shall only be u
11、sed if the contact surface of the square weld nuts according to VW 60449 (preferred parts) is not adequate and the contact surface of the hexagon weld nuts with flange according to VW 60455 (preferred parts) is too large. 2.1 Test parameters / quality documentation for welded joints of weld nuts Min
12、imum requirements for cross tension forces and minimum torques, as well as inspection of the projection-welded joint after the welding process are specified in the VW 60560 standard. 3 Dimensions See Figure 1 and Table 1. Details not specified shall be selected according to purpose. NOTE: Dimension
13、letters and their designations are specified in DIN EN 20 225. 1)The Small Parts Catalog can be called up on the NVS homepage at “Other links“. Page 3 VW 60442: 2007-07 Figure 1 Dimensions Table 1 Dimensions Weight (7,85 kg/dm3)kg1000 pcs. resp.M5 0,8 1,2 6,0 5,75 9,1 13 0,8 0,7 1,8 5,0 10 3,04M6 1
14、1,5 7,5 6,75 12,8 18 1,0 1,1 2,0 6,5 14 8,11M8 1,25 1,8 10,0 8,75 15,6 22 1,2 1,25 2,2 8,0 17 14,50Dimensions given in mmThreadP1)b d2d3d4e h1h2msH13 max. min. min. 0,1 min.0,151) P is the flank lead.d1max. h14 h14Tol. 4 Designation EXAMPLE 1: Designation of a square weld nut with thread M6, materia
15、l according to Technical Supply Specification TL 1318 and surface c340. Square weld nut VW 604 42 M6 TL 1318 Ofl-c340 or Square weld nut N 021 156 5 2)3)EXAMPLE 2: Designation of a square weld nut with thread M6, material TL 1318, quenched and tempered (QT) and surface c310. Square weld nut VW 604 4
16、2 M6 TL 1318+OT - Ofl-c310 or Square weld nut N 021 156 4 2)3)DIN 962 applies to the designation of forms and types with additional order data. 2) Index for material and surface according to standard part drawing. 3) Standard parts can be looked up in the NVS (standard part administration system). D
17、etail R Page 4 VW 60442: 2007-07 5 Technical Supply Specifications 5.1 General requirements / guidelines According to DIN ISO 8992, VW 01110-1, VW 60361. 5.2 Nut material The material according to TL 1318 must be used, generally not quenched and tempered. For testing forces for nuts that are not que
18、nched and tempered see Table 2. If a higher testing force is required than the one specified in Table 2, a material according to TL 1318 with quenching and tempering to (272 to 353) HV 30 is necessary. For testing forces for quenched and tempered nuts, see Table 3. If quenching and tempering to (295
19、 to 353) HV 30 is required, this must be arranged separately. Testing forces are to be coordinated accordingly. 5.3 Type Product class A according to DIN ISO 4759-1; May 1980 issue; thread according to VW 11624, tolerance class 6G. 5.4 Mechanical properties The testing forces according to Tables 2 a
20、nd 3 apply; the testing force test is carried out analogously to DIN EN 20898-2. In disputed cases, the welds are to be ground off before the testing force test. Table 2 Testing forces (nuts not quenched and tempered) Thread Test forced1in NM5 14 800M6 20 900M8 38 100Table 3 Testing forces (nuts que
21、nched and tempered) Thread Test forced1in NM 5 16 300M 6 23 100M 8 42 500Page 5 VW 60442: 2007-07 5.5 Surface protection 5.5.1 Standard coating Square weld nuts are generally supplied with surface c340 according to TL 217. Uncoated and quenched and tempered weld nuts must be pickled after quenching
22、and tempering. With uncoated weld nuts (quenched and tempered or not) corrosion can occur as early as during storage or transport. The manufacturer has to take suitable measures to protect against corrosion, without having a negative effect on the weldability. Limit values for surface flaws are defi
23、ned in DIN EN ISO 6157-2. 5.5.2 Additional coating For uncoated weld nuts, an all-around coating according to TL 188-Ny can be applied. If a part with surface protection according to VW 13750 and TL 188Ny is to be used, this surface shall be agreed upon with the laboratory. 5.6 Quality assurance / a
24、cceptance test Acc. to DIN EN ISO 16426. 6 Identification Square weld nuts are to be marked with the manufacturers code from an M5 thread upwards. This shall be applied in a recessed manner in a position chosen by the manufacturer. If possible, the side to be welded should not be used for this purpo
25、se. Packaging shall always be marked. 7 Drawing notes See Figure 2. Figure 2 Drawing note Page 6 VW 60442: 2007-07 8 Connecting dimensions See Figure 3 (nut not welded on yet) and Table 4. Figure 3 Connecting dimensions Table 4 Connecting dimensions ThreadHole diameter 2)Coaxiality 3)acc. to Table 1
26、d1d5fmin. max. H11M5 0,5 1,75 5,8 0,8M6 0,75 3,0 7,0 1,0M8 1,0 3,5 9,5 1,4Dimensions given in mm2) The given hole diameters for square weld nuts are not design requirements.Planning department and indicated in the respective drawings.Sheet thickness1)aOther hole diameters are permissible if approved
27、 by the Manufacturing department.3) The given values are due to manufacturing requirements and are not indicated in the standardproduction drawing. Function-related restrictions shall be agreed upon with the responsible1) Sheet thicknesses shall be regarded as design recommendations only.9 Reference
28、d standards4TL 188 Mechanical Fasteners; Protection from Weld Spatter and Paint Adhesions for Internal and External Threads TL 217 Zinc Coatings; Requirements for Surface Protection TL 1318 Structural Carbon Steel with Boron: Material Requirements VW 01110-1 Threaded Joints, Part 1: Design and Assem
29、bly Specifications VW 01126-2 Tightening Torques for Bolt Assembly VW 11624 Metric ISO Thread; Limit Dimensions for 6G/6f Tolerance Zone, Male 6f Female 6G VW 13750 Surface Protection of Metal Parts; Surface Protection Types, Symbols, Requirements 4In this Section, terminological inconsistencies may
30、 occur as the original titles are used. Page 7 VW 60442: 2007-07 VW 60250 High-Strength Bolts and Similar Threaded Parts, Technical Supply Specifications VW 60361 Part Reduction; Mechanical Fasteners VW 60449 Square Weld Nuts; High Version VW 60455 Hexagon Head Weld Nuts with Flange VW 60560 Strengt
31、h Testing of Welded Joints of Weld Nuts and Weld Bolts, Projection Welding DIN 962 Bolts and Nuts Designation Specifications DIN EN 20225 Mechanical Fasteners; Bolts and Nuts; Dimensioning DIN EN 20898-2 Mechanical Properties; Nuts with Coarse Thread DIN ISO 8992 Fasteners; General Requirements for
32、Bolts and Nuts DIN EN ISO 898-1 Mechanical Properties, Bolts DIN ISO 4759-1 May 1980 Issue; Mechanical Fasteners - Tolerances for Bolts and Nuts, with Thread Diameters of 1,6 mm to 150 mm, Product Classes A, B and C DIN EN ISO 6157-2 Fasteners Surface Flaws - Part 2: Nuts DIN EN ISO 16426 Fasteners
33、- Quality Assurance System (ISO 16426: 2002); English Version EN ISO 16426:2002 Appendix A (informative) A.1 Testing forces Considering the high shape of the nuts (approx. 1 x d), the testing forces of property class 10 according to DIN EN 20 898-2 can be specified for non-quenched and tempered nuts
34、. For quenched and tempered nuts, the testing forces of property class 12 according to DIN EN 20898-2 can be specified. A.2 Design Non-quenched and tempered nuts are only suitable for pairing with bolts of property class 8.8 according to DIN EN ISO 898-1. This ensures that, even when the threaded jo
35、int is overstressed, the bolt breaks in the free stressed thread area (or shank). Explanation with the following examples using assembly beyond the elastic limit: EXAMPLE 1 Bolt M8, property class 10.9, for assembly preloads, see VW 011 26-2; 29 000 N to 36 000 N. In order to also reliably prevent s
36、tripping the nut thread in case of overstressing, the preloads taken into consideration for evaluating the pairing of bolts and nuts shall be increased by 10% more. The anticipated assembly preloads thus lie between 31 900 N and 39 600 N. For M8 nuts, the testing force is 38 100 N according to Table
37、 2. This means that in some cases where a nut (not quenched and tempered) is paired with a bolt of property class 10.9 according to VW 60250, stripping of the nut thread would have to be expected. Page 8 VW 60442: 2007-07 EXAMPLE 2 Bolt M8, property class 8.8, for assembly preloads, see VW 01126-2;
38、19 500 N to 26 000 N The expected assembly preloads lie between 21 450 N and 28 600 N, so there is no risk of stripping the nut thread. NOTE: Theoretically, with bolts having maximum strength and minimum coefficient of friction, even 20% higher assembly preloads could occur. A.3 Manufacturing Before using square weld nuts according to VW 60442 with thread size M4, consultation with the responsible body manufacturer is necessary, since handling problems could occur during feeding in body-in-white construction.
