1、 Reference number ISO 6119:2006(E) ISO 2006INTERNATIONAL STANDARD ISO 6119 Second edition 2006-08-01 Road vehicles Elastomeric seals for hydraulic disc brake cylinders using a non-petroleum base hydraulic brake fluid (Service temperature 120 C max.) Vhicules routiers Joints en caoutchouc pour cylind
2、res de freins hydrauliques disque utilisant un liquide de frein base non ptrolire (Temprature maximale dutilisation: 120 C) ISO 6119:2006(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be ed
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7、org Published in Switzerland ii ISO 2006 All rights reservedISO 6119:2006(E) ISO 2006 All rights reserved iii Contents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Product requirements. 1 4 Brake test fluid 1 5 Apparatus 2 5.1 Apparatus for test of resistance to fluid at elevated temper
8、ature, physical stability and precipitation characteristics 2 5.2 Apparatus for high-temperature strocking test (see Figure 1) . 2 5.3 Apparatus for low-temperature leakage test (see Figure 2) 3 6 Test requirements. 3 7 Preparation of test specimens 4 8 Resistance to fluid at elevated temperature Ph
9、ysical stability . 4 8.1 Test specimens . 4 8.2 Test procedure 4 9 Resistance to fluid at elevated temperature Precipitation characteristics 5 9.1 Test specimens . 5 9.2 Test procedure 5 10 Resistance to elevated temperature in dry air.6 10.1 Test specimens . 6 10.2 Test procedure 6 11 Ambient-tempe
10、rature stroking test. 6 11.1 Test specimens . 6 11.2 Test procedure 6 12 High-temperature stroking test . 7 12.1 Test specimens . 7 12.2 Test procedure 7 13 Low-temperature leakage test . 8 13.1 Test specimens . 8 13.2 Test procedure 8 13.3 Bend test procedure. 9 14 Cycling humidity storage corrosio
11、n test 9 14.1 Test specimens . 9 14.2 Test procedure 9 ISO 6119:2006(E) iv ISO 2006 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normal
12、ly carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the
13、 work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare I
14、nternational Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some o
15、f the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 6119 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 2, Braking systems and equipment. This second edition cancels a
16、nd replaces the first edition (ISO 6119:1980), which has been technically revised. INTERNATIONAL STANDARD ISO 6119:2006(E) ISO 2006 All rights reserved 1 Road vehicles Elastomeric seals for hydraulic disc brake cylinders using a non-petroleum base hydraulic brake fluid (Service temperature 120 C max
17、.) 1 Scope This International Standard specifies the performance test methods and requirements for elastomeric seals used in road vehicle disc brake cylinders. It is applicable to solid section type seals (square, rectangular, “O”-ring), mounted stationary in the cylinder bore or on the movable pist
18、on of disc brakes. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 48,
19、 Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD ISO 188, Rubber, vulcanized or thermoplastic Accelerated ageing and heat resistance tests ISO 1817, Rubber, vulcanized Determination of the effect of liquids ISO 4926, Road vehicles Hydraulic brake
20、systems Non-petroleum base reference fluids ISO 4928, Road vehicles Elastomeric cups and seals for cylinders for hydraulic braking systems using a non-petroleum base hydraulic brake fluid (Service temperature 120 C max.) 3 Product requirements Seals shall conform to the pertinent drawing in all resp
21、ects and shall be free from blisters, pin-holes, cracks, protuberances, embedded foreign material, or other physical defects which can be detected by thorough inspection. These elastomeric seals shall be suitable for operation in a temperature range of 40 C to +120 C. 4 Brake test fluid The test flu
22、id for all tests except the test prescribed in Clause 14 shall be compatibility fluid as defined in ISO 4926. The fluid specified in Clause 14 shall be ISO fluid for storage corrosion test as defined in ISO 4926, or the fluid agreed by the parties concerned. ISO 6119:2006(E) 2 ISO 2006 All rights re
23、served5 Apparatus 5.1 Apparatus for test of resistance to fluid at elevated temperature, physical stability and precipitation characteristics 5.1.1 Oven, uniformly heated, dry air type conforming to the requirements of ISO 188. 5.1.2 Test jar, screw-top straight-sided round glass type, having a capa
24、city of approximately 250 ml and inner dimensions of approximately 125 mm height and 50 mm diameter, with a tinned steel lid (no insert or organic coating). 5.2 Apparatus for high-temperature strocking test (see Figure 1) 5.2.1 Pneumatic or hydraulic pressure source. 5.2.2 Master cylinder. 5.2.3 Pre
25、ssure gauge. 5.2.4 Wheel cylinder seat stroking fixture. 5.2.6 Cylinder assembly. 5.2.7 Oven, in accordance with 5.1.1. Key 1 pneumatic or hydraulic pressure source 2 master cylinder 3 pressure gauge 4 wheel cylinder seat stroking fixture 5 oven chamber at +120 C 6 cylinder assembly Figure 1 High-te
26、mperature strocking test ISO 6119:2006(E) ISO 2006 All rights reserved 3 5.3 Apparatus for low-temperature leakage test (see Figure 2) 5.3.1 Hydraulic pressure gauge. 5.3.2 Master cylinder. 5.3.3 Cylinder assembly. 5.3.4 Cold chamber, at 40 C. Dimensions in millimetres Key 1 hydraulic pressure gauge
27、 2 master cylinder 3 cylinder assembly 4 cold chamber at 40 C Figure 2 Low-temperature leakage test 6 Test requirements 6.1 After the test for resistance to fluid at elevated temperature (physical stability) (see Clause 8), the seals shall conform to the following requirements: a) any change in volu
28、me shall be within 0 % to +15 %; b) any change in hardness shall be within 0 IRHD to 15 IRHD. 6.2 After the test for resistance to fluid at elevated temperature (precipitation characteristics) (see Clause 9), not more than 0,3 % sediment by volume shall be formed in the test fluid used. ISO 6119:200
29、6(E) 4 ISO 2006 All rights reserved6.3 After the test for resistance to elevated temperature in dry air (see Clause 10), the seals shall conform to the following requirements: a) any change in hardness shall be within 0 IRHD to +15 IRHD; b) test specimens shall show no evidence of blistering, cracki
30、ng or change in shape from original form. 6.4 After the ambient-temperature stroking test (see Clause 11), seals and assembly shall conform to the following requirements: a) no leakage beyond normal wetting of the bore(s) shall occur during the stroking test; b) no leakage beyond normal wetting of t
31、he bore(s) shall occur during the static leak test (see 11.2.3). 6.5 After the high-temperature stroking test (see Clause 12), the seals and assembly shall conform to the following requirements: a) no leakage beyond normal wetting of the bore(s) shall occur during the stroking test; b) no leakage be
32、yond normal wetting of the bore(s) shall occur during the static leak test (see 12.2.4). 6.6 After the low-temperature leakage test (see Clause 13), the seals and assembly shall conform to the following requirements: a) no leakage beyond normal wetting of the bore(s) shall occur during the test peri
33、od or pressure application; b) the seal shall not crack, shall remain flexible and shall return to its approximate original shape within 1 min when tested according to the procedure given in 13.3. 6.7 After the cycling humidity storage corrosion test (Clause 14), the seals and assembly shall conform
34、 to the following requirements: a) no evidence of rubber adhesion of the test seal(s) shall appear during disassembly of the test brake; b) no surface of the sealing systems shall show evidence of corrosion or deterioration which would interfere with proper sealing action; normal staining or discolo
35、ration of metal parts is acceptable if the surface finish is unaffected. 6.8 After all the tests, disassemble the cylinder and inspect the seal. Record the visual condition of the seal bore and piston. Seals shall not show excessive deterioration such as scoring, scuffing, blistering, cracking or ch
36、ange in shape from original appearance. 7 Preparation of test specimens All seals to be tested shall be cleaned prior to testing by rinsing in isopropanol then blown dry or wiped dry with a lint-free cloth. Seals shall not remain in the alcohol for more than 30 s. 8 Resistance to fluid at elevated t
37、emperature Physical stability 8.1 Test specimens From three or more seals to be tested, obtain a sample of mass 3 g to 5 g. 8.2 Test procedure 8.2.1 Determine and record the initial volume of the sample in accordance with ISO 1817. ISO 6119:2006(E) ISO 2006 All rights reserved 5 8.2.2 Determine and
38、record the initial hardness of the sample in IRHD. Measure the hardness as specified in ISO 48 using a microtester (or according to a procedure previously agreed upon between the vendor and purchaser). 8.2.3 Place the sample in the test jar (5.1.2) and completely immerse in 75 ml of brake test fluid
39、 (see Clause 4). Seal the test jar to prevent vapour loss and place in the oven (5.1.1) at 120 C 2 C for 70 h. 8.2.4 After the 70 h, remove the sample from the oven and allow it to cool in the container at 23 C 5 C for 60 min to 90 min. At the end of the cooling period, remove the sample from the co
40、ntainer and rinse it in isopropanol or ethanol then wipe dry with a clean, lint-free cloth. Do not allow the sample to remain in the alcohol for more than 30 s. 8.2.5 Within 60 min of removal from the liquid, determine and record the final volume and hardness, in IRHD, of each seal in accordance wit
41、h 8.2.1 and 8.2.2. Average the results and report as the change in volume and hardness. 8.2.6 Report the change in volume V as a percentage of the original volume. It is given by the formula V = () ( ) () 3412 12 100 mmmm mm % where m 1is the initial mass, in grams, in air; m 2is the initial apparen
42、t mass, in grams, in water; m 3is the mass, in grams, in air after immersion in the test fluid; m 4is the apparent mass, in grams, in water after immersion in the test fluid. 9 Resistance to fluid at elevated temperature Precipitation characteristics 9.1 Test specimens From two or more seals to be t
43、ested, obtain a sample of 4,0 g 0,5 g. Since whole seals are quite large, small pieces may be cut from the seal to arrive at the required mass. Use a minimum number of pieces to obtain a sample of mass 4,0 g 0,5 g. 9.2 Test procedure 9.2.1 Place the sample in a test jar (5.1.2) and cover with 75 ml
44、of the test fluid (see Clause 4). Seal the test jar to prevent vapour loss and place in the oven (5.1.1) at 120 C 2 C. (Optional: a blank test may be conducted on the brake fluid prior to the test, and any sediment resulting from this blank test may be deducted from the volume of sediment obtained a
45、fter the test.) 9.2.2 After 70 h, remove the test jar from the oven. Allow the sample to remain in the fluid at room temperature for 24 h, after which agitate the test fluid and pour into a cone-shaped centrifuge tube of 100 ml capacity. 9.2.3 Rotate the centrifuge tube for 30 min at 1 500 min 1 . N
46、ote the volume of sediment observed in the tube. Repeat the above rotation for an additional 30 min and record any difference in volume of sediment. 9.2.4 Record the percentage amount of sediment obtained after the second centrifuging. ISO 6119:2006(E) 6 ISO 2006 All rights reserved10 Resistance to
47、elevated temperature in dry air 10.1 Test specimens Two or more seals shall be used. 10.2 Test procedure 10.2.1 Measure and record the hardness of each seal in IRHD in accordance with 8.2.2. 10.2.2 Place the test seals in a circulating air oven, as specified in ISO 188, and maintain at 120 C 2 C for
48、 70 h. 10.2.3 At the termination of the heating period, remove the seals from the oven and allow to cool for 16 h to 96 h at room temperature. 10.2.4 After cooling, measure and record the hardness in IRHD, in accordance with 8.2.2, and note any visual change such as cracking, blistering or distortio
49、n. 11 Ambient-temperature stroking test 11.1 Test specimens An adequate number of test seals for at least one complete calliper shall be prepared. 11.2 Test procedure 11.2.1 Installation 11.2.1.1 Moisten the seals and calliper bores with brake test fluid (see Clause 4). Install the test seals in the cylinder. 11.2.1.2 Complete the test calliper assembly, placing the piston so as to simulate a half-worn lining position. 11.2.1.3 Mount the test calliper assembly on a pr
