1、 This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. Ge32001 by International Truck and Engine Corporation. AUGUST 2001 Page 1 of
2、 3 INTERNATIONAL TRUCK AND ENGINE CORPORATION TMS (TRUCK MATERIAL SPECIFICATION) NUMBER: TMS-9537 TITLE: Quality Requirements For Punched And Drilled Holes REVISION: A-1 WRITTEN/EDITED BY: Materials Engineering APPROVED BY: Materials Engineering DATE ISSUED: August 2001 PRINTED COPIES OF THIS DOCUME
3、NT MUST BE VERIFIED FOR CURRENT REVISION This 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 d
4、etermine the applicability of regulatory limits prior to use. Change Notice: Reformatted and Editorial Changes Reference: File Keywords: Punched and Drilled Hole Accuracy 1.0 APPLICATION This specification establishes quality requirements for punched and drilled holes in truck cab and chassis parts
5、and components and is applicable only to those part or assembly drawings which reference this specification. 2.0 SCOPE This specification establishes allowable burr heights on primary (Class”A”) and secondary surfaces and covers diametrical tolerances for four (4) classes of holes. Class 0 Reamed Ho
6、les Class 1 Drilled Holes Class 2 Punched Holes Class 3 Non-critical Holes 3.0 REFERENCE DOCUMENTS (Not Applicable) 4.0 REQUIREMENTS 4.1 Burr Height Unless otherwise specified, burr height shall not exceed 10% of the stock thickness for material up to 12 gage (0.1 inch) thickness and shall not excee
7、d .010 inch on material with thickness greater than 0.1 inch. 4.1.1 Class A Surfaces No burrs are permitted on Class “A” surfaces. Holes identified as being on Class “A” surfaces must be deburred by a secondary operation. No portion of the surface of the hole is permitted to extend beyond the plane
8、of the surface or the surface of the hole must meet established visual standards. NUMBER: TMS-9537 TITLE: Quality Requirements For Punched And Drilled Holes REVISION: A-1 This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permissi
9、on from Corporate Technical Standards. Suppliers are required to assume all patent liability. Ge32001 by International Truck and Engine Corporation. AUGUST 2001 Page 2 of 3 4.1.1.1 Identification Of Holes On Class A Surfaces The manufacturing plant or assembly plant planning department shall identif
10、y those surfaces /holes to be designated as Class A surfaces for which secondary deburring operations are necessary. Identification of these holes may be made on the engineering part/assembly drawing or on the manufacturing plant drilling template. 4.1.2 Cutting Burrs The manufacturing plant or asse
11、mbly plant planning department shall identify holes on which burrs present a cutting hazard in subsequent operations. These burrs shall be removed by a secondary deburring operation so as to meet established visual standards. 4.2 Diametrical Tolerances Unless otherwise specified, all drilled and pun
12、ched holes shall meet requirements of Class 1- drilled Holes or Class 2 Punched Holes. 4.2.1 Class O The closer tolerances of Class O holes are normally achieved by a secondary reaming operation after drilling or punching. The diameter of the hole shall be within the tolerance shown in Table I for i
13、ts entire length/depth. When required, Class O holes shall be designated on the engineering drawing by the designation Class O, or by the use of the tolerance shown in Table I for this class. 4.2.2 Class 1 Class 1 holes are normally drilled. The diameter of the hole will be within the tolerance show
14、n in Table I for its entire length/depth. 4.2.3 Class 2 Class 2 holes are normally punched. The diameter of the hole shall be within the tolerance shown in Table I from the punch entry side of the hole for a distance equal to one third (1/3) of the stock thickness. 4.2.3.1 The plus tolerance on the
15、lower two thirds (2/3) of hole shall not exceed 10% of the stock thickness. The minus tolerance shall be as shown in Table I. 4.2.3.2 The hole locating dimensions shown on the engineering drawing apply to the punch entry side of the part only. When required for engineering function, the punch entry
16、side of the part should be indicated on the engineering drawing. 4.2.4 Class 3 Class 3 holes are non-critical holes for which increased diametrical tolerances are permitted. These holes may be drilled or punched and secondary operations may be performed. The diameter of the hole will be within the t
17、olerance shown in Table I. NUMBER: TMS-9537 TITLE: Quality Requirements For Punched And Drilled Holes REVISION: A-1 This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permission from Corporate Technical Standards. Suppliers are re
18、quired to assume all patent liability. Ge32001 by International Truck and Engine Corporation. AUGUST 2001 Page 3 of 3 4.2.4.1 When required, the manufacturing plant or assembly plant planning department shall identify Class 3 holes and request engineering approval to designate these holes as Class 3
19、 holes. 4.2.4.2 When required, Class 3 holes shall be designated on the engineering drawing by the designation Class 3 or by the use of the tolerance shown in Table I. 5.0 QUALITY (Not Applicable) 6.0 SOURCE APPROVAL AND QUALITY CONTROL (Not Applicable) 7.0 SHIPPING, PACKING AND IDENTIFICATION (Not
20、Applicable) 8.0 Designation On Drawings When requested by Manufacturing, Engineering may designate the class of holes on its drawings. Manufacturing, Engineering or Planning departments may designate the class of hole on the assembly drawing or drilling template. Indicated holes shall meet requireme
21、nts of Class 2, TMS-9537 TABLE I - SIZE TOLERANCES HOLE SIZE CLASS 0 CLASS 1 & CLASS 2* CLASS 3NOMINAL SIZE RANGE, HOLE TOLERANCE HOLE TOLERANCE HOLE TOLERANCESIZE, INCH INCH PLUS, MINUS, PLUS, MINUS, PLUS, MINUSINCH INCH INCH INCH INCH INCH1/16“ .045-0.109 .0040 .0010 .0060 .0040 .0100 .00501/8“ .1
22、10-0.172 .0040 .0010 .0075 .0040 .0175 .00501/4“ .173-0.265 .0050 .0010 .0090 .0040 .0350 .00503/8“ .266-0.422 .0050 .0010 .0105 .0040 .0520 .00501/2“ .423-0.578 .0050 .0010 .0120 .0040 .0850 .00505/8“ .579-0.734 .0050 .0010 .0135 .0040 .1000 .00503/4“ .735-0.921 .0080 .0020 .0135 .0060 .1000 .00701
23、“ .922-1.109 .0080 .0020 .0135 .0060 .1000 .00701 1/4“ 1.110-1.296 .0100 .0020 .0150 .0060 .1000 .00701 3/8“ 1.297-1.484 .0100 .0020 .0170 .0060 .1000 .00701 1/2“ 1.485-1.750 .0100 .0030 .0170 .0060 .1000 .00702“ 1.751-2.484 .0120 .0030 .0170 .0060 .1000 .00703“ 2.485-3.000 .0120 .0040 .0200 .0080 .1000 .0090* Unless otherwise specified, all drilled and punched holes shall meet requirements of Class 1, Drilled Holes or Class 2, Punched Holes.
