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. 2017 by Navistar, Inc. OCTOBER 2017 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.: 1710 DATE: Oct. 2017 WRITTEN/EDITED BY: J. Goldschmidt APPROVED BY: R. Goluch SUPERSEDES: 1610 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specification may involve hazardous materia
3、ls, 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 specif
4、ication 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 the need
5、 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 Chemical Su
6、bstances 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 Specificat
7、ions, 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 4.0 REQUIREMENTS The
8、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 standards for
9、size and/or length. NUMBER: MPAPS P-9566 TITLE: Tack Welds REVISION: 1710 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. 2017 by Navistar, Inc. OCTOBER
10、2017 Page 2 of 5 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 is not required
11、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. “TACK 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 added “there will be 2 or 3 welds evenly spaced around the nut or bolt” R. Goluch 10/25/2017 TACK WELD TYPE II MIN TORQUE _ Nm TACK WELD TYPE I TACK WELD TYPE III
