1、 ENGINEERING STANDARDS Test Procedure SUPERCEDED EDS-T-7413 Determination of the Compressibility of a Cellular Elastomer at Defined Deflection This standard may be applied only for current projects. It is Superceded for all future projects and replaced by GMW14685. 89I-8872P8 -PE ,h8 62e 4G - Note:
2、8 E:48t G8 =97 FF7 957%L+ , FG P-P Program .Bd# GMW14685 ) $4=F7 957F$ . Copyright 2011 General Motors Company All Rights Reserved November 2011 Originating Department: GM Korea Engineering Standards Page 1 of 4 Version : 5 1 Scope Note: Nothing in this standard supersedes applicable laws and regula
3、tions. Note: In the event of conflict between the Korean and English language, the Korean language shall take precedence. 1.1 Purpose. The purpose of this standard is to determine of the compressibility a cellular elastomeric component like a sealing strip at a defined deflection. 1.2 Applicability.
4、 The compressibility of a cellular elastomer at a given deflection shall be defined as the force required maintaining the deflection following compression at a uniform given velocity. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standa
5、rds/Specifications. None 2.2 GM Standards/Specifications. None 2.3 Additional References. None 3 Resources 3.1 Equipment. 3.1.1 Test Machine. 3.1.1.1 The test machine shall be such that the test piece can be compressed between its holder and a pressure foot in a vertical direction. The machine shall
6、 be able to adjust its compression speed. 3.1.1.2 The test machine shall be equipped with a load cell of an accuracy of at least 0.1 %, and a scale to indicate the deflection of the test piece to the nearest 0.1 mm. 1 P7 :0 : ., E:48 6&F !7$ :4-8! 9I8x $4=F 3L 6$ . :0 : F67t 7568 18 88x 7 , F6* 72T8
7、p) F$ . 1.1 +95 . ., E:48t 89I 6 -8872P 6d* 3C* (Sealing Strip)0 M8t -PE (Celluar),h) 9P8%P .E7 $4F7 62e8x 9IF# 4G -7 4F 8$ . 1.2 957 -88 . 89I-8872P8 -PE ,h8 62e8t 89I 2$) 6%L6 89I -GI(8x 8T:F#$ 7 %L# F:E8p) E4F 3L 8$ . 2 4) E:4 / :0 : C-H +d%P 9I8 6# F 48 07 38%P E:48x 957F$ . 2.1 17 E:4 / . None
8、2.2 GM E:4 / . None 2.3 dA E:4 / . None 3 4G 88 3.1 4G 8/x . 3.1.1 4G 8/x . 3.1.1.1 6 8?# 6 :,4 3L: -F8p) 7:8+2P 4G D8x 64A 3L 866 F+ 62$* 88) 99F:E8 7X=# 0.1% 8!7 6 F+ , 64 7:8 -88# 0.1 mm 9I$: ?U9I8 4#F6 F$ . GM KOREA ENGINEERING STANDARDS EDS-T-7413 Copyright 2011 General Motors Company All Right
9、s Reserved November 2011 Page 2 of 4 Version : 5 3.1.2 Test Piece Support. 3.1.2.1 A test piece support shall be produced in the shape of the metal section to which it is attached in service, and the length of it shall be exactly the same with that of the test piece. In order to maintain the test pi
10、ece support in a defined position in relation to the pressure foot, any suitable fastenings can be used. 3.1.2.2 The shape, dimensions, and position, relative to the pressure foot, of the test piece support shall be shown on the relevant part drawing. 3.1.3 Pressure Foot. The shape, dimensions and f
11、inish of the pressure foot shall be produced under consideration of the relevant part drawing. 3.1.3.1 Code A. For test pieces of at least 300 mm length, Pressure foot (2000.2) mm. 3.1.3.2 Code B. For test pieces less than 300 mm length, Pressure foot (1000.1) mm. 3.2 Test Piece. 3.2.1 A test piece
12、shall be a complete component (a sealing strip). 3.2.2 A test piece shall normally be a length, at least 300 mm in length. If impossible, a piece shall be at least as long as pressure foot. 3.2.3 For initial sample approval and arbitration purposes, at least 2 test pieces cut from at least 3 compone
13、nts shall be tested, for routine quality control, at least 1 test pieces, preferably more than 1 component, shall be tested. 4 Procedures 4.1 Conditions. 4.1.1 Test Conditions. Deviations from the requirements of this standard shall have been agreed upon. Such requirements shall be specified on comp
14、onent drawings, test certificates, reports, etc. 4.1.2 Conditioning. For initial sample approval and arbitration purposes, the minimum time period between vulcanization and testing of elastomers shall be 7 days. For routine quality control the period shall be 3 days. The test pieces shall remain at
15、a temperature of +23 E 5K for at least 8 hours before testing without strain during this period. 4.2 Instructions. 4.2.1 The test shall be performed at a temperature of (235) E . The test piece shall be lightly dusted with talc, and any excess removed. 4.2.2 The test piece shall be fixed into the te
16、st machine so that the relation of the test piece to the pressure foot is as specified on the relevant part drawing. 3.1.2 4D -O?$4 . 3.1.2.1 4D -O?$4# 4=7 .E8 8=%L# .887t M8t GI18p) 9P8%L66 F+ , 4D -O?$48 l8# 4G D0 M6x6 F$ . 6 :,7 $4F7 9IF: 88?7 4D -O?$4* 9I4Ad 88F2P# 95$-F 8?4 17%T 3L 8$ . 3.1.2.2
17、 4D -O?$4! 6:,8 GI1 , ?3L 88? &%8t 4) .E $+8 4G $* =lF7 9I$4) 9P8F$ . 3.1.3 6 :, . 6 :,8 GI1 , ?3L E+8t .E7 &d( $*+ , 4) .E $+8x =lF7 9I$4) 9P8F$ . 3.1.3.1 Code A. 4D l8 300 mm 81 4 , 6:, (2000.2) mm. 3.1.3.2 Code B. 4D l8 300 mm 8F 4 , 6:, (1000.1) mm. 3.2 4G D . 3.2.1 4G D8t 7x9PE (6d* 3C* )866 F$
18、 . 3.2.2 4G D8 A d# 2F 300 mm .($ 6 F$ . 4G D8 300 mm) :4/x4 .4F 7# 956$ 956$ 6 :,8 l8 .($# 6 F$ . 3.2.3 2 2 P8 9PE72P 3P 818 4G D8x =x?F7 4G F6 F+ , 8-L958 E:4*4 +958 7# 4#F 1P 818 9PE72P 2 1P8 4G D8x =x?F7 4G F$ . 4 4G 92 388 0F $8 4G F$ . DF 4G 98 4D8t 23 E 5K 72P 956$ 848 % 6| 7.8 8 )Y8 6# 1B) -
19、?F6 F$ . 4.2 4G - . 4.2.1 4G 8t (235) E72P 3LFF+ 4D8t AA * 4. ,oH G Bl6!$ . 4.2.2 4G D8x 4D -O?$47 8=F 1B) 4) .E $+7 +4%P -F8p) 4G 8 4#F$) 4G 8/x7 95$-H 9IF$ . GM KOREA ENGINEERING STANDARDS EDS-T-7413 Copyright 2011 General Motors Company All Rights Reserved November 2011 Page 3 of 4 Version : 5 4.
20、2.3 For Code A, the pressure foot shall then be allowed to contact the test piece under a steady force of (2.0 0.1) N. For Code B, the pressure foot shall contact to the test piece under a steady force 0.5 1 N. 4.2.4 While the above force is applied, the deflection scale shall be set to zero. The te
21、st piece is then deflected by the pressure foot at a uniform rate of 12 mm/min for Code A and 30 mm/min for Code B, as specified on the relevant part drawing. 4.2.5 The force required to maintain this deflection shall be read off the load cell (102) seconds after the specified deflection is achieved
22、. 5 Data 5.1 Expression of Results. The compressibility shall be expressed in N (Newton), rounded up to the nearest 0.01. 6 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. It i
23、s 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. 7 Notes 7.1 Glossary. Not applicable. 7.2 Acronyms, Abbreviations, and Symbols. Not applicable. 8 Coding System This standard
24、 shall be referenced in other documents, drawings, etc., as follows: 4.2.3 Code A 8 7 4G D7 89IF:E (20.1) N8 4F:$) 6:,7t 4D8x 4. .8 , Code B 8 7# 89IF:E 0.5 1 N8 4F:$) 6:,7t 4D8x .8$ . 4.2.4 8 1B* 4D8 6-88 08p) 2X9IF Code A8 7# 12 mm/min8 89I2$) , Code B8 7# 30 mm/min8 89I2$) , 4) $+ -C 7 :9I%P -88+
25、A 4D8x 64A$ . 4.2.5 4D8 6%P 1B72P (102) 2e - EDS-T-7413 - A - 70 100 N 7 F 6:,8 l8 (3.1.3F ) 4G - 4G F+ GM KOREA ENGINEERING STANDARDS EDS-T-7413 Copyright 2011 General Motors Company All Rights Reserved November 2011 Page 4 of 4 Version : 5 9 Release and Revisions This standard was originated in Oc
26、tober 1991. It was first approved by Engineering Standard Committee in October 1991. It was first published in October 1991. 9 9P9I -C P9I 8)Y ., E:48t 1991“x 1087 E:4 -Gl4 .7 %L6 , d3TE:41,h7 8F 1991 “x 10 87 38%L6$ . ., E:48t 1991 “x 10 87 ) 9P9I / -PF%L6$ . Issue / P9I8)Y Publication Date / 38 88 Description (Organization) / 9PP9I76 (:04.2P ) 5 NOV 2011 Apply new Engineering Standard Template. Superceded (Polymer / Organic Material Lab Team) / 4 d3TE:4 64 957 . F9I957 =* (G)8*4G D4 )
