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 2 NAVISTAR, INC. Material, Parts, and Process Specification
2、s (MPAPS) NUMBER: MPAPS DT-14 Former Designation: CEMS DT-14 TITLE: Surface Waviness Definition via ALSA Analyzer CURRENT REV No.: 1610 DATE: Oct. 2016 WRITTEN/EDITED BY: L. Xu APPROVED BY: R. Goluch SUPERSEDES: Rev. April 2009 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION Th
3、is specification may involve hazardous 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 li
4、mits prior to use. 1.0 APPLICATION This specification covers a method for determining surface quality of SMC panels using an Advanced Laser Surface Analyzer (ALSA). * 2.0 SCOPE This test method describes the procedure used to quantitatively determine the surface waviness of SMC substrates used for C
5、lass A exterior applications. The surface quality is evaluated in terms of an ALSA Index Value. 3.0 APPARATUS Required equipment is an Advanced Laser Surface Analyzer (ALSA), which is available from the Composite Polymer Division of Ashland Chemical Co. This apparatus must be properly calibrated and
6、 standardized. 4.0 PROCEDURE In order to assure repeatability of the surface quality measurement or Index Value, it is essential that the test procedure be carefully controlled. The apparatus must be properly calibrated; the test specimen must be properly aligned between the laser and the reflective
7、 screen, and the laser incident angle carefully controlled. 4.1 Test Specimen The test specimen should be of sufficient size to allow a measured area of 250 x 250 mm (minimum) to be analyzed. The specimen surface must be sufficiently reflective to reflect the laser beam onto a screen, where it is re
8、corded by a camera. A flat surface is preferred, but a curved surface may be used if it is free of styling lines, ribs, bosses or inflected spots in the area to be measured. 4.2 Test Specimen Location The specimen or part to be analyzed should be placed approximately halfway between the laser and th
9、e screen, so that the first laser measurement line on the test specimen is 1550 mm in front of the reference mark on the laser apparatus. The reference line on the front side of the laser should be 1070 mm above the measurement area on the test specimen. The reflective screen is mounted 3 meters in
10、front of the reference mark on the laser apparatus. NUMBER: MPAPS DT-14 TITLE: Surface Waviness Definition via ALSA Analyzer REVISION: 1610 This document is restricted and may not be sent outside Navistar, Inc. or reproduced without permission from Corporate Technical Standards. Suppliers are requir
11、ed to assume all patent liability. 2016 by Navistar, Inc. October 2016 Page 2 of 2 4.3 Test Procedure Allow the laser beam to move fully across the entire surface area of analysis and to be fully reflected on the screen and recorded by the camera. Make sure the laser beam can travel the length of th
12、e panel without moving off the panel surface. 4.3.1 ALSA Index Value Take readings on three specimens and average the result. The value of the individual readings shall not vary by more than 10 % from the average value. The average value of the three readings is the ALSA Index Value for that materia
13、l and process. 5.0 REPORT Report the ALSA Index Value of the scanned samples. The Index Value should be submitted along with the material qualification data to Materials Engineering at Navistar International. 6.0 TECHNICAL INFORMATION For further information related to the technical content of this
14、specification, contact: Suppliers may purchase controlled copies of this specification by contacting: Materials 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 Converted To MPAPS R. Goluch 10/20/2016
