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1、Klass.-Nr. 8L K0 0November 2004 Automatic Transmission and Peripheral Assemblies Testing for Residual Foreign Matter PV 3345 Konzernnorm Descriptors:automatic transmissions and peripheral assemblies, transmissions, residual foreign matter, testing Page 1 of 5 Fachverantwortung/ResponsibilityNormung/
2、Standards (EZTD, 1733) 4-PKQ-2AdamiTel: 3459KlempTel: +49-5361-9-75357Sobanski Confidential. All rights reserved. No part of this document may be transmitted or reproduced without the prior written permission of a Standards Department of the Volkswagen Group. Parties to a contract can only obtain th
3、is standard via the responsible procurement department. VOLKSWAGEN AG Norm vor Anwendung auf Aktualitt prfen / Check standard for current issue prior to usage. Form FE 41 - 01.03 Changes The following changes have been made as compared to Test Specification PV 3345, 2000-11: Test method for dry clut
4、ch disks added. Previous issues 1993-04; 2000-11 1Scope This standard is intended for internal use. Externally, it may be made accessible only for released suppliers or those intended to be released. This standard ? is intended to determine the quantity of residual foreign matter in automatic transm
5、issions and peripheral equipment; it applies to supply parts and in-house manufactured parts. 1.1Requirements According to drawing. 2Brief description The examination for residues (residual foreign matter) is performed on completed single parts/assemblies that have undergone final cleaning and have
6、been released for mounting or installation. The required number of test specimens are taken out of the packaging and cleaned under laboratory conditions; any residues are filtered and are evaluated with regard to particle size, mass and type. 2.1Detailed and system description The residual foreign m
7、atter requirement for each single part or each assembly is described by an identifier (letter-number combination). This identifier also gives the minimum quantity to be tested. The code letter defines the maximum permissible particle size and number, the code number defines the mass of the residual
8、foreign matter and the necessary specimen quantity (taking into consideration the available weighing equipment) (see Table 1). The English translation is believed to be accurate. In case of discrepancies the German version shall govern. December 2006 Changes The following changes have been made as c
9、ompared to the PV 3345: 2004-11 issue: - Note for restricted usage added Use for new designs and drawing modifications is no longer permitted. Replaced by: PV 3370 Normung/Standards (EZTN, 1733) Tiefenbach Tel: +49-5361-9-75357 Terlinden Page 2 PV 3345: 2004-11 Table 1 Code letterCode numberRequirem
10、ent A-Particle size 200 m B-No requirement C-Particle size 200 m, max. 1 particle/part 600 m permissible D-Particle size 1,000 m 0.005 0.005 mg/part 0.01 0.01mg/part 0.03 0.03mg/part 0.05 0.05mg/part 0.1 0.1mg/part 0.3 0.3mg/part 0.5 0.5mg/part 1 1.0mg/part 3 3.0mg/part 5 5.0mg/part 10 10.0mg/part S
11、pecimen quantity The necessary minimum quantity depends on the permissible mass of the residual foreign matter and the weighing equipment used for evaluation. It is oriented toward the relevant component or assembly, the sensitivity of the area of application and the apparatus available for recordin
12、g the mass of the residual foreign matter. The specimen quantity is calculated according to the following formula: Resolution of the scale in mg * factor 50 Specimen quantity Permissible residual foreign matter mass per part in mg 2.2Description Description example for determining residual foreign m
13、atter in an automatic transmission and peripheral equipment: Residual foreign matter “A 0.1” according to PV 3345 AParticles 200 m are not permissible 0,1Total residual foreign matter mass 0.1 mg per part Specimen quantity A less accurate scale (e.g. resolution 1.0 mg) would result in a 10-fold incr
14、ease in the minimum specimen quantity, i.e. 500 parts. Page 3 PV 3345: 2004-11 3Test procedure 3.1Specimen parts Supply parts and in-house manufactured parts in the version intended for final assembly. The parts shall be removed from the (unopened) original packaging. The minimum specimen quantity i
15、s calculated according to Section 2.1. 3.2Cleaning The parts are cleaned in an organic hydrocarbon-based solvent. Non-aromatic safety cold cleaning agents free of chlorinated hydrocarbons and of flash point hazard class A3 have been tried and tested for this purpose. 3.2.1Components with a surface e
16、asily accessible on all sides Clean the specimen parts in a sufficient quantity of the specified cleaning agent and with the help of ultrasound (60 s in the ultrasonic cleaning unit per cleaning process). Depending on the size of the parts, they can either be treated one after the other or all toget
17、her. Remove the specimen parts and wash off any remaining particles with clean detergent (wash bottle). With certain larger components from this group (e.g. valve bodies) it may be necessary to “tap” various areas of the specimen prior to cleaning to loosen stubborn particles. Whether this is necess
18、ary must be decided on a case-by-case basis. Any particles loosened and removed using this approach must be added on to the total residual foreign matter mass. 3.2.2Components with a partial residual foreign matter requirement Components where only a subsection of the surface is subject to a residua
19、l foreign matter requirement (e.g. inside of transmission cases; see note in drawing) are flushed out with cleaning fluid (ensure that a sufficient quantity of cleaning fluid is used; 1 l/housing). The procedure described under Section 3.2.1 for better loosening of stubborn particles (“tapping” the
20、specimen) must be used for all specimens in this group. Any particles loosened and removed using this approach must be added on to the total residual foreign matter mass. 3.2.3Hollow bodies such as hoses, tubes, lines, radiators, etc. Hollow bodies (where generally only the interior is subject to a
21、residual foreign matter requirement; see note in drawing) must be flushed with cleaning fluid from both sides. This is done by pumping cleaning fluid through the component from both sides using a commercial piston membrane pump. The dirty cleaning agent that escapes is then directed through a filter
22、. 1. Fill the component with cleaning fluid, connect a pump to the clean side and a filtering unit to the dirty side. 2. Submerge the suction side of the pump and the filter outlet in a storage tank containing approx. 1 l of clean detergent. 3. Rinse the component in both directions for 3 min each w
23、ith 2 l/min. Page 4 PV 3345: 2004-11 3.2.4Dry clutch disks In the case of dry clutch disks (in-house mounting), the dirt quantity is determined by tapping them on a hard rubber plate 20 times (test plate approx. 10 x 20 cm) instead of by the standard test procedure. Detailed description: 10 disks ar
24、e placed on both index fingers, allowed to fall from between the hands onto the hard rubber plate from a height of approx. 5 cm and immediately picked up again. This procedure is repeated 19 times. The procedure is performed on a suitable surface (e.g. household tray) with raised edge and the disk p
25、articles and/or the dust is weighed. In the case of oiled clutch disks from clutch ASSY and previously operated transmissions, for example, the dirt quantity is determined by spraying the disks with safety cleaner. Ultrasound must not be used due to the danger of the disks being destroyed. 3.3Filtra
26、tion and filters Filter the cleaning agent containing residues. A vacuum filtering unit with a pre-weighed filter is used for this purpose (preferable scale accuracy 0.0001 g). Then rinse out the filter and residue with petroleum ether and dry (observe safety regulations!). Filter type:Nylon fibrous
27、 filter Mesh size:15 m Size: 50 mm (larger diameters are permissible) 4Evaluation The mass of the residual foreign matter is determined by re-weighing the filter, the result in mg/part is divided by the number of specimens. Result:Residual foreign matter mass in mg/p 5.0 mg/part The particle size an
28、d, if applicable, the composition are then determined. This is generally done visually/microscopically. Important information regarding the cause of the soiling can be gained from the composition of the residual matter. We therefore require that the residual matter be analyzed. Very specialized anal
29、ysis methods such as RFA, IR, DSC and REM-EDAX can be used here in addition to the visual/microscopic determination. Result:Particle size in mm * mm * mm (length * width * thickness) The residual foreign matter mass and particle size are compared with the requirements in the drawing specification. N
30、ote that ALL DIMENSIONS must be within the specification when evaluating the particle size! 4.1Sample result data Total mass of residual foreign matter:0.08 mg/part Particles 200 mnot present Specimen quantity:100 Page 5 PV 3345: 2004-11 5Equipment, chemical agents Laboratory ultrasonic cleaning uni
31、t Membrane pump (e.g. KNF type B, supply rate (1.0 3.0) l/min, Merck Eurolab order no. 224B5126) Line filtering unit Vacuum filtering unit Analysis scale (preferable accuracy 0.1 mg) Stereomicroscope with ocular micrometer (25x magnification) Nylon fibrous filter with 15 m mesh size (50 mm or larger
32、) Safety cold cleaning agent (e.g. VW material number 29.2829) Petroleum ether 6Sources of supply NYLON fibrous filter (meter goods):e.g. “NYTREL 15” Union Seidengaze GmbH Am Speieracker 1 61239 Ober-Mhrlen, Germany Tel.: +49 (0) 6002 / 7575 Fax: +49 (0) 6002 / 7959 Safety cold cleaning agente.g. “Reiniger AL 760” Pfinder GmbH & Co. Rudolf-Diesel-Strae 14 71032 Bblingen, Germany Tel.: +49 (0) 7031 / 2701-0 Fax: +49 (0) 7031 / 280500