1、 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. OCTOBER 2016 Page 1 of 5 NAVISTAR, INC. Material, Parts, and Process Specificatio
2、ns (MPAPS) NUMBER: MPAPS P-9566 Former Designation: TITLE: Tack Welds CURRENT REV No.: 1610 DATE: Oct. 2016 WRITTEN/EDITED BY: J. Goldschmidt APPROVED BY: R. Goluch SUPERSEDES: new release PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specification may involve hazardous
3、materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safety and health practices and to determine the applicability of regulatory limits prior to use. 1.0 APPLICATION This
4、 specification applies to small, non-AWS-standard, metal arc welds, commonly referred to as tack welds, that are specified on NAVISTAR engineering drawings, part assembly drawings, or installation drawings. The subject welds typically do not meet standard AWS requirements due to available space or t
5、he need to limit heat to avoid part distortion. These welds can be structural and non-structural, are undersized, and are all special cases. 2.0 SCOPE This specification defines 3 types of Navistar tack weld call outs, and the quality and qualification requirements for each type. 2.1 Restricted Chem
6、ical Substances Effective January 1, 2007, all product supplied to the requirements of this specification must comply with the requirements of the MPAPS B-50 specification. 3.0 REFERENCE DOCUMENTS Unless otherwise specified, the latest issue of all referenced standards shall apply. The following Spe
7、cifications, Standards, and Regulations are referenced in this specification. Quality System Standard ISO 9001 or TS-16949 CFR Title 29, Part 1910 NAVISTAR Supplier Packing and Shipping Std. D-13 NAVISTAR Engineering Design Std. A-16 NAVISTAR MPAPS B-50 NAVISTAR MPAPS FT-9553 AWS D2.4 NUMBER: MPAPS
8、P-9566 TITLE: Welds Non Standard REVISION: 1610 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. OCTOBER 2016 Page 2 of 5 4.0 REQUI
9、REMENTS The location of joints to be welded shall be designated on the engineering drawing using the appropriate welding symbols (per AWS A2.4). All non-standard, metal arc welds will be identified on the print as one of the types listed below. 4.1 Weld Dimensions The weld does not conform to AWS st
10、andards for size and/or length. 4.2 Weld Type 4.2.1 Type I 4.2.1.1 Tack Weld: General This is a non-structural weld with the primary purpose to hold 2 parts together during the assembly process. The weld may break during the assembly process and there are no residual quality requirements. The weld i
11、s not required to have a size or length identified. A weld size/length requirement can be added to the weld callout for purposes of limiting size to reduce heating and control distortion. The size or length does not have to conform to AWS standards. The type of weld may or may not be identified. “TA
12、CK WELD TYPE I” will be listed in the tail of the welding symbol. 4.2.2 Type II 4.2.2.1 Tack Weld: Nuts & bolts Regular and weld nuts & bolts This is not recommended but can be used if validated by an approved test method. A welded nut design, for grade 1 nuts or studs, should use a projection weld
13、nut and RPW process as defined in MPAPS FT-9553. For all other grades not using the RPW process, clinch nut construction is preferred. A structural weld with the primary purpose to hold a nut or bolt in place permanently. The weld must not break. The weld will be a fillet type and the size may or ma
14、y not be defined. The weld will meet the assembly strength requirements and verification testing may be required as agreed upon between Navistar design engineering and the supplier. “TACK WELD TYPE II, MIN TORQUE _ Nm” will be listed in the tail of the welding symbol. 4.2.2.2 Tack Weld: Fillet Lap W
15、eld A structural weld with the primary purpose to hold 2 parts together in a lap joint. The effective weld length must be at least 90% of the specified weld length. The weld will meet quality requirement as indicated section 5.0 below or as agreed to by Navistar design engineering and the supplier a
16、nd as noted on the drawing. “TACK WELD TYPE II” or “TACK WELD TYPE II, see note #_ for requirements” will be listed in the tail of the welding symbol NUMBER: MPAPS P-9566 TITLE: Welds Non Standard REVISION: 1610 This document is restricted and may not be sent outside Navistar, Inc. or reproduced wit
17、hout permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. OCTOBER 2016 Page 3 of 5 4.2.3 Type III Tack Weld: Temporary A non-structural weld with the primary purpose to hold 2 parts together during the shipping and handling proc
18、ess. The weld should have no size or strength requirement. The type of weld should not be identified. The weld must be removed. “TACK WELD TYPE III” will be listed in the tail of the welding symbol. 5.0 QUALITY The following weld quality requirements are for Type II welds 5.1 Fusion The weld shall e
19、xhibit complete fusion. 5.2 Undercut The weld undercut shall not exceed 10% of the base material thickness. 5.3 Porosity The weld shall not exhibit any porosity. 5.4 Cracking No cracking of either metal component in or adjacent to the fusion zones is permitted. 5.5 Welded Nuts 5.5.1 Nut Alignment Th
20、e nut or weld-nut will be properly aligned with the hole in the part such that a standard “Go/No-Go” thread gage will pass easily through the hole in the part and engage the threads in the nut. 5.5.2 Nut Thread Distortion Any distortion of the nut threads which changes the prevailing torque characte
21、ristics of the nut or weld-nut or that affects the attainment of the assembly torque specification using the automated assembly tooling is not permissible. 5.6 Weld Spatter Any weld spatter generated during the nut weld process that impedes the easy passage of the thread gage through the hole, or it
22、s engagement with the nut threads, or that in any other way changes the prevailing torque characteristics of the nut or weld-nut, or that affects the attainment of the assembly torque specification using the automated assembly tooling, is not permissible. 6.0 QUALIFICATION Engineering qualification
23、of sources is required in advance of production shipments for Type II tack welds. Samples shall be accompanied by test data certifying that all specified requirements have been met. Qualification of Type I and Type III tack welds is not required. NUMBER: MPAPS P-9566 TITLE: Welds Non Standard REVISI
24、ON: 1610 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2016 by Navistar, Inc. OCTOBER 2016 Page 4 of 5 6.1 Quality Control Plan A Quality Control Plan
25、for products supplied to the requirements of this specification will be established by mutual agreement between NAVISTAR and the supplier. Unless specific exception is noted, the following characteristics, where applicable*, shall be included in the plan as features for management by statistical pro
26、cess control.* * Other characteristics for inclusion in the control plan may be specified on the engineering drawing and/or purchase order. * See NAVISTAR Engineering Design Standard A-16 7.0 SOURCE APPROVAL AND QUALITY CONTROL 7.1 Supplier Requirements All suppliers to NAVISTAR are required to be r
27、egistered to ISO 9001 Quality System Requirements. NAVISTAR will also accept TS-16949 registration as long as the supplier can also fulfill all AIAG PPAP (Production Part Approval Process) documentation and approval requirements. Suppliers must maintain their certification with an accredited registr
28、ar and must furnish copies of registration certificates to their Corporate Buyer upon request. 7.2 Approval Parts supplied against contracts or purchase orders citing this specification shall be equivalent in all respects to those samples which were approved by the purchaser. No changes in formulati
29、on or processing practices are permitted without approval. In the event that changes in material, properties, processing practices, construction, color, or labeling of the product are required, the supplier shall notify NAVISTAR Materials Engineering and Purchasing and Supplier Development of the pr
30、oposed change(s). Test data indicating conformance to all requirements of this specification, test samples, and new or amended or updated Material Safety Data Sheet(s) (MSDS), in accordance with CFR Title 29, Part 1910 shall be submitted with the request for change. 7.3 Process Control The supplier
31、shall either, perform and report results of tests on specific lots of parts produced using ISO 9001 or TS-16949 guidelines, or provide statistical evidence of the lot having been produced in a state of statistical control and with a process capable of providing all required properties. The part supp
32、lier and the quality control manager of the using NAVISTAR plant may determine testing and reporting requirements on specific products. 8.0 SHIPPING AND HANDLING Shipping and identification shall be in accordance with NAVISTAR Supplier Packing and Shipping Standard D-13. Parts shall be packaged so a
33、s to avoid any damage in shipment detrimental to the appearance of the part. NUMBER: MPAPS P-9566 TITLE: Welds Non Standard REVISION: 1610 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are require
34、d to assume all patent liability. 2016 by Navistar, Inc. OCTOBER 2016 Page 5 of 5 9.0 DESIGNATION ON DRAWINGS Drawings requiring non-standard welds must specify welding requirements on the engineering drawing using the following weld symbol format: UG stamp #S105 (or equivalent note) should be added
35、 to the body of the drawing to read: “Tack welds must comply with the requirements of MPAPS P-9566.” 10.0 TECHNICAL INFORMATION For further information related to the technical content of this specification, contact: Suppliers may purchase controlled copies of this specification by contacting: Mater
36、ials Engineering and Technology Dept. 10400 W. North Avenue Melrose Park, IL 60160 E-mail: MaterialsEngineeringN IHS Markit. 15 Inverness Way East Englewood CO 80112-5776 Phone: 1-800-854-7179 E-mail: AutomotiveIHS.com Website: http:/ REVISION HISTORY Revision Level Change Approved by Date Approved 1610 New Release R. Goluch 10/6/2016 TACK WELD TYPE II MIN TORQUE _ Nm TACK WELD TYPE I TACK WELD TYPE III
