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1、GENERAL MOTORS SUPPLIER DEVELOPMENT GENERAL PROCEDURE SUPPLIER SUBMISSIONS OF MATCH CHECK MATERIAL GP-6 _ PRINTED IN U.S.A. _ February, 1990 Published by Supplier Development Administration Page 1 GM-1689 GM Purchasing Activities 1. SCOPE This procedure applies to suppliers providing material to Gen
2、eral Motors for Production Match Check programs. All material shipped shall be in accordance with the re- quirements set forth in this procedure. The term “sup- plier” shall be used to indicate any manufacturer of parts for General Motors, including all General Motors Divi- sions. The “Production Ma
3、tch Check” program is a design check and tryout of dimensionally correct parts from pro- duction tooling to ensure that they fit together and can be used to build assemblies and vehicles to design specifica- tion and intent. Production Match parts require specific marking to identify dimensional int
4、egrity as compared to design. 2. OBJECTIVE The objective of this procedure is to identify, qualify and classify the status of material to be used for Production March Check programs at General Motors Divisional loca- tions. It is General Motors intent that parts from production mate- rials and tools
5、 be used to build Production Match Check as- semblies and vehicles. These parts shall conform to specifica- tions except as detailed in Paragraph 3: “Parts Specifications for Production Match Check”. 3. PART SPECIFICATIONS FOR PRODUC- TION MATCH CHECK These specifications have been developed with fu
6、ll knowledge and appreciation of the timing aspects of a Production Match Check program as related to part readiness for production. The intent of these specifica- tions is to provide a method by which parts intended for use in a General Motors Production Match Check pro- gram can be identified and
7、classified as to the level of compliance to design and production readiness of those parts. 3.1 PART SHAPE AND DIMENSION: In order to accomplish Production Match Check objectives, it is essential to know the dimensions and shape of each part as compared to design specifications so that any problems
8、identified can be assigned a cause and each cause addressed for final problem resolution. Each part shall be made to the specified design change level for shape and dimension. 3.2 SURFACE FINISH AND COLOR: Surface finish and color are not critical to the Match Check program. For example, graining on
9、 plastic parts is not required. Discrepancies in non-interface surfaces, such as minor dings on a metal surface, do not make a part unaccept- able for Match Check as long as final fit of the part is not impaired or altered by this discrepancy. However, finished, painted, and/or plated parts furnishe
10、d by the supplier to assembly are required to have been through these processes so that effects on shape and dimension are comprehended at Production Match Check. Parts that are normally subjected to heat or other processes at the assembly plant may require retrofit after the initial match check is
11、complete. This insures total process comprehension. It is desirable that plastic or fabric ma- terial parts be white or lightly colored to enhance the marking visibility of parts. 3.3 PART FUNCTION: If the function of a assembly is the responsibility of the supplier and that funcitn does not affect
12、further assembly or fit of other parts or as- semblies, the part or assembly provided for the Produc- tion Match Check program need not be functional. For example, a radio does not have re receive a signal and lay, but must be able to be fully assembled “including all connectors” into the Production
13、 Match Check vehi- cle. If, however, the supplied part must function in order to meet the intent of Production Match Check, then func- tion is a requirement for those parts and assemblies. For example, a door window regulator assembly must function in the production Match Check vehicle. Since the do
14、or window glass is raised and lowered by the regulator assembly, it must function so that ht e glass maybe checked to design specifications in both the raised and lowered positions. 4. PRODUCTION MATCH CHECK PRO- GRAM REQUIREMENTS 4.1 ENGINEERING CHANGE LEVEL: All material submitted for Production M
15、atch Check programs must conform to the engineering design level specified for Start of Production. 4.2 PROTOTYPE PARTS: Use of a prototype part for Match Check must have written approval from the GENERAL MOTORS SUPPLIER DEVELOPMENT GENERAL PROCEDURE SUPPLIER SUBMISSIONS OF MATCH CHECK MATERIAL GP-6
16、 _ PRINTED IN U.S.A. _ February, 1990 Published by Supplier Development Administration Page 2 GM-1689 GM Purchasing Activities General Motors Match Check coordinator at the Match Check location. 4.3 MARKING PRODUCTION MATCH CHECK PARTS: Specific attention to part dimensions and shape is required. Al
17、l parts submitted for the Match Check program, except as noted in section 4.5 are to be marked and/or scribed in such a manner as to identify feature locations such as gap, contour, attachment sur- faces, and hole locations. The location and size of set up points or checking fix- ture locating and h
18、olding points must be marked on the parts. This will assure that the parts are held identically in each check fixture during the match check and will aid in problem solving. The marking and/or scribe lines shall reflect actual conditions compared to nominal design specifications. Deviations from des
19、ign are to be documented on the General Motors Supplier Warrant of Match Check Ma- terial, GM form 1690, as described in paragraph 5 of this procedure. The following sub-sections detail marking requirements for various areas: 4.3.1 BODY REFERENCE LINES: Gridlines or scribelines for each of three (3)
20、 body planes (height, inboard/outboard and for/aft) shall be marked to 100 mm intervals (example: 1100, 1200, 1300, etc.) on all parts that are submitted for the Production Match Check program. (Refer figure #1) When a 100 mm increment is not achievable, provide one (1) identified body line in each
21、plane (example: 1055 fore/aft). Figure #2 provides an example of body reference or gridlines applied to major body panels. To show the reference lines, metal parts shall be bare metal coated with blue ink metal marker. Ungrained plastic parts shall be first marked with indelible ink and gridlines sc
22、ribed into the inked surfaces. Glass, fabric, and fab- ric coated parts shall be marked with ink reference lines on tape applied in reference line areas. GENERAL MOTORS SUPPLIER DEVELOPMENT GENERAL PROCEDURE SUPPLIER SUBMISSIONS OF MATCH CHECK MATERIAL GP-6 _ PRINTED IN U.S.A. _ February, 1990 Publi
23、shed by Supplier Development Administration Page 3 GM-1689 GM Purchasing Activities GENERAL MOTORS SUPPLIER DEVELOPMENT GENERAL PROCEDURE SUPPLIER SUBMISSIONS OF MATCH CHECK MATERIAL GP-6 _ PRINTED IN U.S.A. _ February, 1990 Published by Supplier Development Administration Page 4 GM-1689 GM Purchasi
24、ng Activities 4.3.2 PART FEATURES: All significant part fea- ture lines, breaklines, and match points, where visual surface continuity to an adjacent panel is evident, shall be marked to establish the actual feature location on the part compared to nominal design location. Two (2) ex- amples of thes
25、e features are: 1) The longitudinal break- line on the quarter panel, doors, and front fender; and, 2) The door edge and the matching door line on a fender or quarter panel. On those features measure- ments shall be recorded on the part at points 25 mm apart along that edge or feature. That is: a) t
26、he outline shall be marked on odd non-body lines (25 mm, 75 mm, 125 mm, etc.), b) the contour shall be marked on even mm body lines (50 mm, 100 mm, 150 mm, etc.). Specific features that are nominal to design shall be marked “0.0”. Panel markings shall show actual metric dimensions from nominal at in
27、tervals described above. (Example 1.5 Hi = 1.5 mm High.) In significantly important ar- eas such as coves, “dog legs”, corners, and radii, the measurement are to be marked at 10 mm intervals. All discrepancies shall be reported in 0.1 mm increments of measurement. Figure #3 details marking of discre
28、pan- cies and Figures 4, 5, 6, 7 provide examples of part mark-up. GENERAL MOTORS SUPPLIER DEVELOPMENT GENERAL PROCEDURE SUPPLIER SUBMISSIONS OF MATCH CHECK MATERIAL GP-6 _ PRINTED IN U.S.A. _ February, 1990 Published by Supplier Development Administration Page 5 GM-1689 GM Purchasing Activities GEN
29、ERAL MOTORS SUPPLIER DEVELOPMENT GENERAL PROCEDURE SUPPLIER SUBMISSIONS OF MATCH CHECK MATERIAL GP-6 _ PRINTED IN U.S.A. _ February, 1990 Published by Supplier Development Administration Page 6 GM-1689 GM Purchasing Activities GENERAL MOTORS SUPPLIER DEVELOPMENT GENERAL PROCEDURE SUPPLIER SUBMISSION
30、S OF MATCH CHECK MATERIAL GP-6 _ PRINTED IN U.S.A. _ February, 1990 Published by Supplier Development Administration Page 7 GM-1689 GM Purchasing Activities 4.3.3 ATTACHMENT POINTS AND LOCATION FEATURES: Attachment points and locating features on ALL PRODUCTION MATCH CHECK parts shall be marked to i
31、ndicate variation from design specifica- tions. Where a determination can be made, the amount of variation from nominal shall be marked in the High/Low, Inboard/Outboard and Fore/Rearward direc- tions. All discrepancies and variations are to be re- corded to the nearest 0.1 mm. MARKING AN ATTACHMENT
32、 HOLE A minimum of two directions of measurement are re- quired for each attachment point or location feature. Please note: all parts can be measured in at least two di- rections. An example is the use of “crosshairs” on a hole to represent true centerline location of the hole. A second set of “cros
33、shairs” would show the design loca- tion of the hole. The difference in location is measured by measuring the distance between the two sets of par- allel “crosshairs”. Variation to design must be marked (recorded) on the part to the nearest 0.1 mm. That is, if a feature or hold is off location by 0.
34、16 mm, it should be recorded as 0.2 mm. If it is off location by 0.15 mm, it should be re- corded as 0.1 mm. Figure 8 provides an example of marking a hole location. 4.4 MEASUREMENT EQUIPMENT 4.4.1 PART LAYOUT: Gridlines shall be marked on the part through the use of layout equipment or other measur
35、ement apparatus using the latest engineering drawing and/or specifications. All locating and at- tachment points shall be marked to show actual versus design conditions. Datum, or “Set up” points used by the supplier shall be marked on the parts so that identi- cal part rechecks can be made at the M
36、atch Check loca- tion. 4.4.2 COMPUTER AIDED COORDINATE MEASUREMENT MACHINE: Parts designed to math model data are typically checked with the use of coordinate measuring machine (CMM) shall be marked and scribed for features and details as previously de- scribed in section 4.3.2. These points shall i
37、ndicate variation to design and not to the actual machine read- ings. 4.5 EXEMPTIONS: Parts designed with no ref- erence to body coordinates (X,Y,Z) are exempt from body reference line requirements. These same condi- tions apply to electrical, standard, acoustical and small parts drawn in free (true
38、) positions. 5. SUPPLIER WARRANT OF PRODUCTION MATCH CHECK MATERIAL 5.1 WARRANT SUBMISSION: The latest issue of a “General Motors Supplier Warrant of Match Check Material”. GM form 1690, (see Appendix 1 for latest form date), shall be completely filled out and must ac- company all Production Match C
39、heck material sup- plied. This includes standard parts and material which has been approved through the GP-3 “General Motors Supplier Submission of Material for Production Ap- proval” Procedure (GM 1990). The supplier with the prime contract to supply produc- tion material is responsible for the com
40、pletion of the supplier warrant, whether or not they produced the Pro- duction Match Check material. Productions Match Check material submitted without a supplier warrant is deemed unacceptable and may result in a PR/R issued as outlined in section 5.4. GENERAL MOTORS SUPPLIER DEVELOPMENT GENERAL PR
41、OCEDURE SUPPLIER SUBMISSIONS OF MATCH CHECK MATERIAL GP-6 _ PRINTED IN U.S.A. _ February, 1990 Published by Supplier Development Administration Page 8 GM-1689 GM Purchasing Activities 5.2 EXEMPTIONS: Carryover parts are exempt from warrant submission requirements except when re- quested to be marked
42、 and scribed for Match Check. Carryover parts affected, on which marking is re- quested, will be identified outside the normal material scheduling system. 5.3 WARRANT FORMS AND IDENTIFICA- TION LABELS AND TAGS: MATCH CHECK WARRANT FORMS, MATERIAL IDENTIFICA- TION LABELS, AND TAGS shall be obtained b
43、y the supplier from General Motors procuring division (Al- lied suppliers should obtain this material from G.M. Photographics). 5.3.1 PRODUCTION MATCH CHECK WAR- RANT FORMS: Production Match Check Warrant Forms shall be completed by the supplier for each shipment of each part number shipped , and sh
44、all be signed and dated by an authorized official of the sup- plier who is responsible for the preparation and submis- sion of the material. Where appropriate, inspection re- ports should be attached or included. Match Check in- formation is to be reported on the warrant form as fol- lows: SECTION 1
45、: Shipping Part and Purchasing Informa- tion. Completely fill in all the blanks; To: Mach Check Coordinator (supplied by build site) Address: Full build site address (supplied by build site) Quantity: Quantity of the specified part number in shipment Pack/Shipping date: The date part is packed or sh
46、ipped Part number: Only one part number Part name: Complete proper name Engineering Change level and Blue Print Date: The change level that the part is made through and the asso- ciated blueprint or design record date. GM Procuring Division: name GM Buyer: Name SECTION 2: FOR GP-3 APPROVED PARTS BEI
47、NG SENT TO THE PRODUCTION MATCH CHECK PROGRAM. This section applies when parts have received Limited or Full Production Approval. When this is the case, complete this section, omit section 3 and provide the supplier identification information in section 4. Desig- nate whether material submitted for production ap- proval through the GP-3 procedure has received Full or Limited approval (check box), provide the date that ap- proval was issued, the name of th
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