1、 ENGINEERING STANDARDS General Specification SUPERCEDED EDS-T-4602 Method for Checking Radial Lip Seal Garter Springs This standard may be applied only for current projects. It is Superceded for all future projects and replaced by GMW3157. (8 Close-Wound Coil Extension Springs)8 2 07 38%P E:48x 957F
2、$ . 2.1 17 E:4 / . None 2.2 GM E:4 / . GMW3059 2.3 dA E:4 / . None 3 4G :4/x -C D4 3.1 4G 88 . 3.1.1 9I . 4G 2X/x7t 8/x# 9P 2e#8x -PHLF 8TGF 9I Fx:8x J66 F$ . GM KOREA ENGINEERING STANDARDS EDS-T-4602 Copyright 2011 General Motors Company All Rights Reserved November 2011 Page 2 of 6 Version : 4 3.1
3、.2 Alternatives. Alternative test facilities and equipment may also be used. However, all measuring variables as specified in this standard shall be determined correctly with respect to their physical definition. 3.2 Conditions. 3.2.1 Test Conditions. Deviations from the requirements of this standar
4、d shall have been agreed upon. Such requirements shall be specified on component drawings, test certificates, reports, etc. 3.3 Safety. This standard may involve hazardous materials, operations, and equipment. This standard does not propose to address all the safety problems associated with its use.
5、 It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 3.4 Documentation. Samples of components or material released to this standard shall be tested for conformity with the r
6、equirements of this standard and approved by the responsible GM Department prior to the start of delivery of production level components or materials. Any change to the component or material, e.g., design, function, properties, manufacturing process and/or location of manufacture requires a new rele
7、ase of the product. It is the sole responsibility of the supplier to provide the customer, unsolicited, with documentation of any change or modification to the product/process, and to apply for a new release. If not otherwise agreed to, the entire verification test shall be repeated and documented b
8、y the supplier prior to start of delivery of the modified or changed product. In some cases, a shorter test can be agreed to between the responsible GM department and the supplier. 4 Requirements and Procedure 4.1 Assembled Inside Diameter. A recommended gage is shown in Figure 1. Diameter of gage i
9、ncreases in increments of 0.13 mm from a diameter substantially less than assembled ID of smallest spring to be measured, to a diameter at large end substantially greater than largest spring to be measured. The spring is allowed to slide over the smaller diameter increments until it reaches a diamet
10、er where it begins to roll. Then this diameter is recorded as the spring assembled inside diameter 3.1.2 $4= 3L$ . $4= 4G 42X0 8/x4 17%T 3L 8$ . ,) ! ., E:47 +d%P + 23 211FFT Where, T1 = Initial tension (N). F1 = First force reading (N). F2 = Second force reading (N). 4.3.2 Maximum initial tension i
11、s calculated as follows; DSdFi 8)( max3(max)S Where, Fi(max) = Maximum initial tension (N). d = Wire diameter (mm). D = Mean coil diameter (mm). S = Torsional stress diameter (MPa). Smax = 271.65e-0.1043D/d. 4.3 3F8*)Y8t 6x(7t M8 ?U9IF$ . y 6$EBd (Adapter)7 3F8*8x 88T) 9* F$ . y 8: E 8Bd (Pointer)4
12、7:8 , H8x d)F$ . 8 F:E (F2)8 9I%P 3F8* )Y F8$ . 4.3.1 ?U9I $4 $4 2 (Mandrel)88* -46: 3L 866 F$ . (98C8 6&F 8A$ .F8 08$ ). Figure 4: Checking Device for Spring Nib / ,* 4: Checking Device for Spring Nib 4.5 Excessive Windup. The garter spring (with ends joined) shall be removed from the seal and plac
13、ed on a flat surface.(Any “figure eighting“ or raising from surface indicates excessive windup present and is basis for rejection). 5 Provisions for Shipping 6 Notes 6.1 Glossary. Calculated Initial Tension: Calculated initial tension is the maximum theoretical “preload“ for a given coil diameter an
14、d wire diameter that can be wound into the spring during the coiling operation. Minimum Initial Tension: Minimum initial tension is the lower limit of tolerance for the force value specified which is consistent with good manufacturing practices and is equivalent to 0.8 of the calculated initial tens
15、ion. The measured initial tension of the actual spring should always exceed the specified minimum initial tension. Spring Force: Spring force is the load required to extend the spring 18mm. This is the total force of the spring and is the sum of the initial tension plus the load contributed by the s
16、pring rate. Assembled ID (Inside Diameter): The inside diameter of a garter spring as assembled with the ends screwed tight (see Figure 5). 4.5 0$F 7t8& 6 (Wind Up). ! .8 7$%P 4Bd 3F8*8t 6d) .Bd .*%L62P E+7 DDF “7 9l6 F$ . (6&F 88GI8 +68! E+8p).Bd8 &(l8t 0$F 7t8& 6 %L6$# 8x !A! , .F8 08$ ). 5 2T957
17、$4F 9F 6 768 9I8 6.1 98,l 76 . 1 $4 8) “2 2 2 Q H8+ , ) 9P9I / -PF%L6$ . Issue / P9I8)Y Publication Date / 38 88 Description (Organization) / 9PP9I76 (:04.2P ) 4 NOV 2011 Apply new Engineering Standard Template. Superceded (Lub, Vent & Fastener Development Team) / 4 d3TE:4 64 957 . F9I957 =* (Lub, Vent & FastenerP-PD4 )
