1、 ENGINEERING STANDARDS Test Procedure LIMITED USE EDS-T-7431 Determination of Pressure Resistance for Rubber Cork Do Not Use on New Program; No Replacement. ,h *A 8 !62e 4G - Note: 8 E:48t G8 =97 FF7 957%L+ , FG P-P Program 72P# 957%L: 6#$ . Copyright 2011 General Motors Company All Rights Reserved
2、November 2011 Originating Department: GM Korea Engineering Standards Page 1 of 5 Version : 3 1 Scope Note: Nothing in this standard supersedes applicable laws and regulations. Note: In the event of conflict between the Korean and English language, the Korean language shall take precedence. 1.1 Purpo
3、se and Applicability. This test method shall be used to determine of the setting behavior (compressibility, resilience) of flat sealings made of rubber cork at a static pressure load. 2 References Note: Only the latest approved standards are applicable unless otherwise specified. 2.1 External Standa
4、rds/Specifications. None 2.2 GM Standards/Specifications. None 2.3 Additional References. None 3 Resources 3.1 Equipment. 3.1.1 Test Apparatus for Determining the Pressure Resistance. In principle, the test apparatus shall be equipped so that a certain force applied to a defined surface and over a s
5、pecified time is constantly maintained. The testing apparatus consists of a pressing plate which is pressed by a screw spring compressed by means of the screw on a certain dimension with defined pressure on the test piece. (See Figure 1). 3.1.2 Hot Chamber to keep the specified temperature including
6、 the tolerances. 3.1.3 Testing Apparatus for preconditioning. 3.1.4 Saw, Scissors for manufacture of test pieces. 3.1.5 Test Fluidity corresponding to each specification. 1 P7 :0 : ., E:48 6&F !7$ :4-8! 9I8x $4=F 3L 6$ . :0 : F67t 7568 18 88x 7 , F6* 72T8p) F$ . 1.1 +95 -C 957 -88 . ., 8t 9I F:EF72P
7、 ,h *A 8 !62e (68 /G.)8 )8x 9IFd 88F 17%P$ . 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 2.2 GM E:4 / . None 2.3 dA E:4 / . None 3 4G 88 3.1 4G 8/x . 3.1.1 !62e 4G 8/x . 9I%P 4G F:E8x C9I 48% 6| 4G D8 E+7 89IF 8T:4A3L 866 F+ , ,* 10 M8 3A * 3F8*7 8F 68x 4F# 6DD0 :$
8、4 &%8p) 2e%L6 8$ . 3.1.2 C9I)= -88 !72P C9I 7$* 8T: 4#F 7X/D . 3.1.3 98=* 3LF8x 88F 38X =- . 3.1.4 4G D =x?* 88F 488 , 9 4 . 9 minutes B 24 ? 6 4 minutes C 48 ? 6 4 minutes D 72 ? 6 4 minutes E Specially defined 4 Procedures 4.1 Conditions. 4.1.1 Test Conditions. Deviations from the requirements of
9、this standard shall have been agreed upon. Such requirements shall be specified on component drawings, test certificates, reports, etc. 4.1.2 Conditioning. The test pieces shall be tested 72 hours min. later after the manufacture of the plate material. For initial sample approval and arbitration pur
10、poses shall be conditioned for at least 24 hours under a temperature 23 E 2K and relative humidity (506) %. The routine quality control shall be performed in the delivery condition without conditioning. 4.2 Instructions. 4.2.1 To avoid deformation, the test pieces shall be divided. Both parts shall
11、be positioned at the same interval for the starting force. 4.2.2 The test pieces shall be loaded through laying of the pressure plate of the system, support plate, spring, screw. This load shall meet a preload of 7 KPa. 4.2.3 Afterwards, the thickness of the test pieces shall be determined under pre
12、load (h0). 4.2.4 After the test pieces shall be loaded with the major load of 700 KPa the test structure shall be left over the required test duration in the air, in the hot chamber or in each media. 3.2 4G D . 3.2.1 8: 8$ D# 9PE72P (6.50.2) cm2 8 +958x J# 4G D8x =x?F%L 4G D8 % # 6.5 10 mm -887 &66
13、F$ . +6 4G D8 “2P 4G F$ . 3.2.2 4G G7 +23 E 5K 8 $4d:E7 -?F$ . 3.4 4G d8 . $8 E7 !A! 4G d8 :E 9I%P &7 + 2T9IF$ . & 4G d8 A 1 4 4 . 9 . B 24 ? 6 4 . C 48 ? 6 4 . D 72 ? 6 4 . E -$ 9P 4 4G 9DD -E7 “#$ . 4.2.2 6 4G 8/x8 6DD8x 87F7 4G D7 7 KPa8 5 ) minutes relaxation the thickness of the test pieces und
14、er preload shall be determined (h2). 5 Data 5.1 Evaluation. 5.1.1 The compressibility Z in % is calculated as follows: Z=h 4 F h 5h4 100(%) 5.1.2 The Resilience R in % is calculated as follows: R=h 6 F h 5h4 F h 5 100(%) 5.2 Results. The pressure resistance of rubber cork shall be designated arithme
15、tic mean value in %, rounded up to 1 %. 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 is the responsibility of the user of this standard to establish appropriate safety
16、and health practices and determine the applicability of regulatory limitations prior to use. 7 Notes 7.1 Glossary. Compressibility: The change of the thickness of a test piece is seen at a pressure load in specified conditions. Resilience: The change of the thickness of a test piece is seen between
17、pressure load (compressing) in specified conditions and release. 7.2 Acronyms, Abbreviations, and Symbols. Not applicable. 8 Coding System This standard shall be referenced in other documents, drawings, etc., as follows: 4.2.5 C9I d8 % 6| -? G 4G D8 % * ?U9IF7 d)F$ (h1). 4.2.6 :4 4G F:E8x 9PF 5 ) .8
18、 -?F 4G D8 % * ?U9IF7 d)F$ (h2). 5 4G $8Bd 5.1 D4 . 5.1.1 68 (Z)8t $847 8F 1F$ . Z=h 4 F h 5h4 100(%) 5.1.2 G.)8 (R)8t $847 8F 1F$ . R=h 6 F h 5h4 F h 5 100(%) 5.2 0 E4 . ,h *A 8 !62e (68 /G.)8 )8t 5 0?8 13T DF8x F7 %) !A!+ , 1 %: E4F$ . 6 6|987 $4F 7 9 ., E:48t 88G ,p: , 86 , 8/x &%8x E FF 3L 8$ .
19、., E:48t 87 $4F 170 4)%P +& 6|98 ,l9P8 F8x 9P4F:# 6#$ . &d(2P 17 987 95FF 6|980 I 1B* 9DF , -18 9PF 728 957 7 .* 9IF# 8t ., E:4 1788 =y8 1F8$ . 7 768 9I8 7.1 98,l 76 . 68 : 9I%P 98p) 4G D8x 64 4G D8 G % 7t8 =8* -e.8) !A! . G.)8 : 9I%P 4G F:E8x 9P 4 4G D8 % =8* -e.8) !A! . 7.2 66 -C dGl . F$-1F 68 .
20、8 Ed - $* ,l2P! $+ &%72P ., E:48 87%T &# $80 M8 EdF$ . GM KOREA ENGINEERING STANDARDS EDS-T-7431 Copyright 2011 General Motors Company All Rights Reserved November 2011 Page 4 of 5 Version : 3 English Pressure Resistance to EDS-T-7431-A Compressibility: (93) % Resilience: 80 % min. Requirement Test
21、Method Designation ,l !62e - EDS-T-7431-A 68 : (93) % G.)8 : 80 % 81 7 9 4G - 4G F+ 9 Release and Revisions This standard was originated in April 1996. It was first approved by Engineering Standard Committee in April 1996. It was first published in April 1996. 9 9P9I -C P9I 8)Y ., E:48t 1996 “x 4 87
22、 E:4 -Gl4 .7 %L6 , d3TE:41,h7 8F 1996“x 487 38%L6$ . ., E:48t 1996“x 487 ) 9P9I / -PF%L6$ . Issue / P9I8)Y Publication Date / 38 88 Description (Organization) / 9PP9I76 (:04.2P ) 3 NOV 2011 Apply new Engineering Standard Template. Limited use with no replacement (Polymer / Organic Material Lab Team) / 4 d3TE:4 64 957 . F9I957 ($4=E:4 68 ) =* (G)8*4G D4 ) GM KOREA ENGINEERING STANDARDS EDS-T-7431 Copyright 2011 General Motors Company All Rights Reserved November 2011 Page 5 of 5 Version : 3 Figure 1 / ,* 1
