1、 WORLDWIDE FASTENER STANDARD Date: 2001-06-26 WE 961 MATERIAL, PHYSICAL PROPERTIES AND PERFORMANCE OF PIERCE NUTS Printed copies are uncontrolled. Page 1 of 3 Copyright 2001, Ford Global Technologies, Inc. 1. SCOPE. This standard covers the material, physical properties and performance requirements
2、of self piercing nuts in the range M6 to M12 inclusive. 1.1 REFERENCES. ISO 3573 - Hot-rolled carbon steel sheet of commercial and drawing qualities. ISO 3574 - Cold-reduced carbon steel sheet of commercial and drawing qualities. W-DX10 - WDX Worldwide Die Design and Construction Specifications Manu
3、al WE 950 - Prevailing Torque-Type Steel Hexagon Nuts and Hexagon Flange Nuts - Mechanical and Performance Properties 2. MATERIAL AND PHYSICAL PROPERTIES. The material and physical properties for pierce nuts shall be in accordance with WE952. After installation of a thread rolling screw, these nuts
4、shall withstand the proof load equivalent to property class 8. 3. GENERAL. Nuts shall be capable of piercing their own hole in a test plate as described in Clause 5. 4. PERFORMANCE. NOTE: In all tests, damage pertains to nut loosening, panel distortion is allowable. 4.1 PUSH-OUT. After assembly in a
5、 steel sheet panel of the thickness specified in Table 1 the assembly must be placed on a test rig as shown in Figure 1 and a load applied in the direction shown. The assembly must withstand the push-out load specified in Table 1 without loosening in the panel, or showing evidence of damage when exa
6、mined at 10x magnification. 4.2 TORQUE-OUT. After assembly in a steel sheet panel of the thickness specified in Table 1 the assembly must be placed in a test rig as shown in Figure 2 and a torque applied in the direction shown. The assembly must withstand the torque-out load specified in Table 1 wit
7、hout turning or loosening in the panel. 4.3 SEALED APPLICATIONS. Accomplished through use of special die button (see W-DX10) during nut installation. After installation assembly must contain standing water for one hour after electrocoat and spray primer surfacer. 4.4 PREVAILING TORQUE Accomplished t
8、hrough use of special installation tool (see W-DX10). The pierce nuts shall meet the requirements of WE 950 - Property Class 8. 5. TEST PLATE. The test plate shall be 0.2% maximum carbon steel to ISO 3573 or ISO 3574 and thickness as specified in Table 1. WORLDWIDE FASTENER STANDARD Date: 2001-06-26
9、 WE 961 MATERIAL, PHYSICAL PROPERTIES AND PERFORMANCE OF PIERCE NUTS Printed copies are uncontrolled. Page 2 of 3 Copyright 2001, Ford Global Technologies, Inc. Table 1. Nominal Size Test Plate Thickness t, mm Minimum Push-Out kN Minimum Torque-Out Nm M5 1 +/- 0.08 0.9 7.4 M6 1 +/- 0.08 0.9 12.4 M8
10、1 +/- 0.08 0.9 30.0 M10 1 +/- 0.08 1.3 60.0 M12 1.5 +/- 0.08 1.5 105.0 NOTE: Lower valves will apply if the test plate is under 1.0mm. Figure 1. WORLDWIDE FASTENER STANDARD Date: 2001-06-26 WE 961 MATERIAL, PHYSICAL PROPERTIES AND PERFORMANCE OF PIERCE NUTS Printed copies are uncontrolled. Page 3 of 3 Copyright 2001, Ford Global Technologies, Inc. Figure 2.
