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VW_60358-2018-09-EN.pdf

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VW_60358 2018 EN大众最新标准 金属表面防护
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Group standard VW 60358 Issue 2018-09 Class. No.: 61179 Descriptors: plastic, screw, self-tapping, test, thermoplastic PT Screws Dimensions, Requirements, Tests Previous issues VW 60358: 1994-02, 1995-12, 2006-09, 2009-01, 2011-10, 2013-11 Changes The following changes have been made to VW 60358: 2013-11: – Entry for dimension r corrected in figure 1 and figure 2, and dimension r added to figure 3; – Table 6: Applicable documents updated and footnote b) added. Contents Page Scope ......................................................................................................................... 2 Dimensions ................................................................................................................ 2 Type R, fillister head screw ........................................................................................ 2 Type Q, fillister head flange screw ............................................................................. 4 Type M, flat head screw ............................................................................................. 6 Type H, hexagon head screw .................................................................................... 7 Technical Supply Specifications ............................................................................... 10 Designation .............................................................................................................. 10 Torsion load capacity ............................................................................................... 11 Requirements ........................................................................................................... 11 Test method ............................................................................................................. 11 Torsion test .............................................................................................................. 11 Head soundness test ............................................................................................... 12 Determining the tightening torque ............................................................................ 13 Applicable documents .............................................................................................. 14 Bibliography ............................................................................................................. 14 1 2 2.1 2.2 2.3 2.4 3 4 5 5.1 5.2 5.2.1 5.2.2 5.3 6 7 Always use the latest version of this standard. This electronically generated standard is authentic and valid without signature. The English translation is believed to be accurate. In case of discrepancies, the German version controls. Page 1 of 14 Technical responsibility The Standards department EXDV/3 Boris Jülge Tel.: +49 5361 9 35083 K-ILI/5 Tim Hofmann K-ILI Tel.: +49 5361 9 27995 Uwe Wiesner All rights reserved. No part of this document may be provided to third parties or reproduced without the prior consent of one of the Volkswagen Group’s Standards departments. ? Volkswagen Aktiengesellschaft VWNORM-2018-02Page 2 VW 60358: 2018-09 Scope This Volkswagen (VW) standard defines the properties for heat-treated, self-tapping screws that are used for detachable threaded connections in thermoplastics. NOTE 1: VW 01128 [1] contains notes on the design and use of self-tapping screws. NOTE 2: VW 60361 [4] contains specifications for reducing the number of parts. VW 60000 [2] and VW 60000, supplement 1 [3] are used for variant reduction for fasteners. Dimensions See figure 1 to figure 4 and table 1 to table 5. Dimension letters and their designations, with the exception of dimensions “y“ and “d 1 “, are specified in DIN EN ISO 225. Type R, fillister head screw Dimensions in millimeters Legend d 1 Thread major diameter (nominal thread diameter) P Pitch of the thread y Length of incomplete thread (distance from end of screw up to first full thread) 1 For length increment, see table 5. 2 Hexalobular sockets as per VW 01048 Figure 1 – Type R 1 2 2.1 Page 3 VW 60358: 2018-09 Table 1 – Dimensions for type R Dimensions in millimeters Dimensions Thread sizeTP3 TP4 TP5 TP6 al ≤ 2 × d 1 2.7 -2.2 3.6 -3.1 4.5 -4.0 5.4 -4.9l > 2 × d 1 3.4 -2.9 4.5 -4.0 5.6 -5.1 6.8 -6.3 d amax. 3.6 4.7 5.7 6.8 d kNominal dimension max. 5.60 7.00 8.00 11.00min. 5.30 6.64 7.64 10.57 d sNominal dimension max. 2.40 2.60 3.10 4.00min. 2.15 2.35 2.80 3.70 d wmin. 4.90 6.24 7.24 10.07 kNominal dimension max. 2.40 2.60 3.10 4.00min. 2.15 2.35 2.80 3.70 r min. 0.2 0.3 0.3 0.4 r f5 ±0.9 6 ±0.9 6.5 ±1.1 9 ±1.1 y 2.00 -1.35 2.70 -1.80 3.40 -2.24 4.10 -2.70Hexalobular socket Nominal sizeT10 T20 T25 T30 A Auxiliary di‐ mension 2.8 3.95 4.5 5.6 t Nominal dimension max. 1.27 1.35 1.91 2.29min. 0.88 0.96 1.52 1.90Page 4 VW 60358: 2018-09 Type Q, fillister head flange screw Dimensions in millimeters Legend d 1 Thread major diameter (nominal thread diameter) P Pitch of the thread y Length of incomplete thread (distance from end of screw up to first full thread) 1 For length increment, see table 5. 2 Hexalobular sockets as per VW 01048 Figure 2 – Type Q 2.2 Page 5 VW 60358: 2018-09 Table 2 – Dimensions for type Q Dimensions in millimeters Dimensions Thread sizeTP3 TP4 TP5 TP6 al ≤ 2 × d 1 2.7 -2.2 3.6 -3.1 4.5 -4.0 5.4 -4.9l > 2 × d 1 3.4 -2.9 4.5 -4.0 5.6 -5.1 6.8 -6.3 cmax. 1.0 1.0 1.2 1.2Nominal dimension min. 0.8 0.8 1.0 1.0 d amax. 3.6 4.7 5.7 6.8 d cNominal dimension max. 6.00 8.00 10.00 12.00min. 5.52 7.42 9.42 11.30 d hNominal dimension max. 5.5 7.5 9.0 10.5min. 5.0 7.0 8.5 10.0 d sNominal dimension max. 2.6 3.5 4.4 4.9min. 2.0 2.8 3.5 4.2 d wmin. 5.04 6.84 8.84 10.60 kNominal dimension max. 1.8 2.9 3.0 4.0min. 1.4 2.5 2.6 3.6 r min. 0.2 0.3 0.3 0.4 r f2.65 ±0.35 5.2 ±0.90 5.8 ±0.90 6.6 ±1.10 y 2.00 -1.35 2.70 -1.80 3.40 -2.24 4.10 -2.70Hexalobular socket Nominal sizeT10 T20 T25 T30 AAuxiliary di‐ mension 2.8 3.95 4.5 5.6 t Nominal dimension max. 1.15 1.35 1.78 2.29min. 0.88 0.96 1.39 1.90Page 6 VW 60358: 2018-09 Type M, flat head screw Legend d 1 Thread major diameter (nominal thread diameter) P Pitch of the thread y Length of incomplete thread (dis‐ tance from end of screw up to first full thread) 1 For length increment, see table 5. 2 Hexalobular sockets as per VW 01048 3 Reference point for the head height k is the intersection point of d 1and the lower head contour of the flat head; see also DIN EN 27721. Figure 3 – Type M Table 3 – Dimensions for type M Dimensions in millimeters Dimensions Thread sizeTP3 TP4 TP5 TP6 a l ≤ 2 × d 1 2.7 -2.2 3.6 -3.1 4.5 -4.0 5.4 -4.9 l > 2 × d 1 3.4 -2.9 4.5 -4.0 5.6 -5.1 6.8 -6.3 d kNominal dimension max. 5.5 8.4 9.3 11.3min. 5.2 8.0 8.9 10.9 d sNominal dimension max. 2.6 3.5 4.4 4.9min. 2.0 2.8 3.5 4.2 k max. 1.7 2.6 2.8 3.0 r Tol. -0.6 0.8 1.0 1.3 1.5 y 2.00 -1.35 2.70 -1.80 3.40 -2.24 4.10 -2.70Hexalobular socket Nominal sizeT10 T20 T25 T30 A Auxiliary di‐ mension 2.8 3.95 4.5 5.6 2.3 Page 7 VW 60358: 2018-09 t Nominal dimension max. 1.15 1.35 1.78 2.03min. 0.88 0.96 1.39 1.65 Type H, hexagon head screw Dimensions in millimeters Legend d 1 Thread major diameter (nominal thread diameter) P Pitch of the thread y Length of incomplete thread (distance from end of screw up to first full thread) 1 For length increment, see table 5. 2 Indentation at the manufacturer's discretion Figure 4 – Type H 2.4 Page 8 VW 60358: 2018-09 Table 4 – Dimensions for type H Dimensions in millimeters Dimensions Thread sizeTP3 TP4 TP5 TP6 al ≤ 2 × d 1 2.7 -2.2 3.6 -3.1 4.5 -4.0 5.4 -4.9 l > 2 × d 1 3.4 -2.9 4.5 -4.0 5.6 -5.1 6.8 -6.3 cmax. 1.0 1.2 1.5 1.6 Nominal dimension min. 0.4 0.6 0.9 1.0 d amax. 3.6 4.7 5.7 6.8 d c Nominal dimension max. 6.3 8.3 10.5 11.0min. 5.8 7.6 9.8 10.0 d s Nominal dimension max. 2.6 3.5 4.4 4.9min. 2.0 2.8 3.5 4.2 d wmin. 5.14 7.14 9.10 9.60 e min. 4.28 5.96 7.59 8.71 k Nominal dimension max. 2.8 3.4 4.1 5.4min. 2.5 3.0 3.6 4.8 k wmin. 1.3 1.5 1.8 2.7 r 1min. 0.2 0.3 0.3 0.4 r 2max. 0.5 0.5 0.5 0.5 s Nominal dimension max. 4.00 5.50 7.00 8.00min. 3.82 5.32 6.78 7.78 y 2.00 -1.35 2.70 -1.80 3.40 -2.24 4.10 -2.70Page 9 VW 60358: 2018-09 Table 5 – Screw lengths and weights Dimensions in millimeters Head type Thread sizeTP3 TP4 TP5 TP6Head weight a) in g R 0.30 0.5 0.75 1.82 Q 0.26 0.73 1.11 1.99 M b) 0.14 0.5 0.69 0.89 H 0.32 0.76 1.55 2.45 l c) Weight over nominal length l a) in g Nominal dimension Tolerance 8 ±0.45 0.22 0.36 — — 10 0.27 0.45 0.7 — 12 ±0.55 0.33 0.54 0.85 1.47 14 0.38 0.63 0.99 1.71 16 0.44 0.72 1.13 1.95 18 0.49 0.82 1.27 2.2 20 ±0.65 0.54 0.91 1.41 2.45 22 0.60 1.00 1.55 2.69 25 0.68 1.13 1.76 3.05 28 0.76 1.27 1.97 3.42 30 0.82 1.36 2.11 3.66 32 ±0.8 — 1.45 2.25 3.91 35 — 1.58 2.47 4.27 38 — 1.72 2.68 4.64 40 — 1.81 2.82 4.88 42 — — 2.96 5.13 45 — — 3.17 5.49 48 — — 3.38 5.86 50 — — — 6.1 a) Screw weight = head weight + weight over nominal length “l“ b) The nominal length “l“ includes the head height. This is taken into account in the calculation formula for determining the head weight. The head weight does not include the weight of the shank. c) The commercial lengths are indicated by weight data.Page 10 VW 60358: 2018-09 Technical Supply Specifications See table 6. Table 6 – Technical Supply Specifications Material a) Boron steel Chemical composition (as per ladle analysis) Mass percent C Si Mn P S Cr Cu B 0.15 to 0.25 ≤ 0.30 0.6 to 1.2 ≤ 0.035 ≤ 0.035 ≤ 0.35 ≤ 0.25 0.0005 to 0.0050 Steel grade b) : For example, 20MnB4 and 23MnB4 as per DIN EN 10263-4 Mechanical properties c) R m= 1 040 MPa to 1 190 MPa, quenched and tempered to a Vickers hardness range of 320 HV to 370 HV Surface finish Ofl-r643, Ofl-r673 d) Technical Supply Specification TL 244, VW 13750 Thread VW 60362 Limit deviations, form tolerances and posi‐ tional tolerances Product grade A DIN 267-2 Surface flaws VW 60801 Acceptance test DIN EN ISO 16426 General requirements DIN ISO 8992 a) Aging resistance must be ensured by nitrogen-binding elements such as Al or Cr. b) Different steel grades are permissible following consultation with the “Standard and Multi-Use Parts“ department EXDV/3 (cost cen‐ ter 1733). c) As per DIN EN ISO 4042, tempering is prescribed in conjunction with electroplated surface protection. d) Ofl-r645 and Ofl-r677 must not be used. The lubricating film of this surface protection type reacts with the plastic material, leading to complete decomposition. Designation Example designation for a screw with nominal thread diameter d 1= 4 mm (TP4), nominal length l = 16 mm, type Q and surface protection type Ofl-r643: Screw VW 60358 – TP4 × 16 – Q – Ofl-r643 or Screw N 105 496 03 1)2) 3 4 1) Part number suffix for property class, surface protection type, and design as per standard part drawing or master data list (SDL) and VW 60000 [2]. 2) For released parts, see the standard parts management system (NVS).Page 11 VW 60358: 2018-09 Torsion load capacity Requirements The torsion load capacity of screws must be high enough so that the breaking torque values do not fall below minimum breaking torques as per table 7 during testing as per section 5.2.1. Test method Torsion test The screw being tested must be clamped into a divided clamping device with nut thread or into an equivalent test device such that the clamped part of the screw is not damaged. At least two screw threads must protrude over the clamping device and at least two complete screw threads (without screw end) must be secured in the device or in the test equipment. For short screws, the head must not be in contact with the device and the full thread must be firmly clamped. The screw must achieve the minimum breakdown torques as per table 7. Table 7 – Minimum breaking torques Thread size Minimum breaking torque M B in Nm TP3 1.1 TP4 2.5 TP5 4.7 TP6 7.7 Legend 1 Threaded insert, two-part 2 Blind hole Figure 5 – Example of a test device for conducting the torsion test 5 5.1 5.2 5.2.1 Page 12 VW 60358: 2018-09 Head soundness test General information The thread and the integrity of the transitional zone between the head and the non-threaded seg‐ ment of the shank are tested by impact bending of the screw head by a specified angle on a fixed block. The head soundness test applies to screws with the following technical specifications: – Head strength is greater than the strength of the threaded segment; – Nominal length l ≥ 1.5 d 1 . Test fixture The fixed block shown in figure 6 must be designed as follows: – Minimum hardness on Rockwell Hardness C Scale: 45 HRC – Hole diameter d hand radius r 1as per table 8 – Thickness b ≥ 2 d 1 . Legend b Minimum thickness of the fixed block: 2 d 1 1 l ≥ 1.5 d 1 Figure 6 – Test fixture for the head soundness test 5.2.2 5.2.2.1 5.2.2.2 Page 13 VW 60358: 2018-09 Table 8 – Hole diameter d hand radius r 1 Dimensions in millimeters Thread size d h a) r 1 min. max. TP3 3.4 3.58 0.7 TP4 4.5 4.68 0.7 TP5 5.5 5.68 0.7 TP6 6.6 6.82 0.7 a) Medium column as per VW 01027 Test method The screw must be tested in the as-delivered condition. The head soundness test must be carried out with a fixture as shown in figure 6. The block must be fixed. It must be possible to bend the screw head with several strikes of a hammer by an angle of 90° - β. The screw must be examined at a magnification between 8x and 10x. Evaluation There must not be any indications of cracks in the segment between the head and the non-threa‐ ded segment of the shank. In screws that are threaded up to the head, this requirement is fulfilled even if there is an incipient crack in the first thread but the head does not break off. Determining the tightening torque For plastic threaded connections, the tightening torque M Tcan be estimated by the correlation in formula (1), where the factor k is between 0.3 to 0.5: M T= M SI max+ k × (M O min- M SI max ) (1) The determined tightening torques must be sorted into the following torque classes for a better overview and handling: 0.9 Nm – 1.5 Nm – 2 Nm – 2.5 Nm – 3 Nm – 3.5 Nm – 4.5 Nm – 6 Nm – 8 Nm The following formula formula (2) must apply for the upper limit of the tightening torque: M T max= 0.6 × M O min (2) Screw tests must be performed with genuine parts for all applications. The tightening torques must be determined by measuring the screw-in torque (M SI ) and over-tightening torque (M O ) in at least 10 tests. The proper function of the designated connection must be ensured in advance by means of proof-of-principle testing. The tightening torque M Tdetermined in the experiments must be assigned to the next lower torque class (for classification, see above). For further use, this torque class is defined as the applicable value for the tightening torque. 5.2.2.3 5.2.2.4 5.3 Page 14 VW 60358: 2018-09 Applicable documents The following documents cited are necessary to the application of this document: Some of the cited documents are translations from the German original. The translations of Ger‐ man terms in such documents may differ from those used in this
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