AA-SUP-1-1995.pdf
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1、STD.AA SUP-1-ENGL 1775 = Ob04500 002878L 474 I- - v I Understanding Aluminum Extrusion Tolerances The Aluminum Association I- I lid n I I : 1 1 n L I, I mil r n Copyright The Aluminum Association Inc. Provided by IHS under license with AA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for
2、Resale, 04/18/2007 05:28:01 MDTNo reproduction or networking permitted without license from IHS -,-,- S T D O A A SUP-II-ENGL 1995 Ob04500 OOII782320 About The Aluminum Association The Aluminum Association represents primary and secondary producers of aluminum, as well as semi- fabricated products,
3、Member companies operate approximately 400 plants in 30 states. The Associations mission is to increase understanding of aluminum and the aluminum industry and increase aluminums use through its technical, statistical, marketing and informational activities and services. The Associations programs ar
4、e designed to serve its customers, consumers, educators, students, government and the public generally. For the aluminum industry and its customers, the Association develops standards and designation systems, prepares codes and specifications involving aluminum products and addresses technical and m
5、arketing issues for the industry. The Association is the leading source of statistics for the aluminum industry. Copyright 1990. Unauthorized reproduction by photocopy o r any other method is illegal. The Aluminum Association, Inc. 900 19th Street, N.W. Washington, D.C. 20006 First Edition January 1
6、990 Second Edition February 1995 Copyright The Aluminum Association Inc. Provided by IHS under license with AA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 05:28:01 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-AA SUP-1-ENGL 1995 O60
7、4500 00118783 267 Understanding Aluminum Extrusion Tolerances his publication explains and illustrates many aspects of the published standard tolerances for aluminum T alloy extrusions, such as those contained in The Aluminum Associations Aluminum Standards and Data and the American National Standar
8、d Dimensional Tolerances for Aluminum Mill Products, ANSI H35.2. These standards are maintained by The Aluminum Association, the latter on commission by the American National Standards Institute (ANSI). The tolerances published in Aluminum Standards and Data and in ANSI H 3 5 . 2 result f r o m the
9、voluntary consensus standards development process prescribed by ANSI. Hence, the existence of the standards do not preclude an individual or organization fiom manufacturing, marketing, purchasing, or using products not conforming to the tolerances covered by the standards and discussed in this publi
10、cation. The publication and the videotape upon which is was based were developed under the guidance of a technical task force of The Aluminum Associations Extruded Products Division, which sponsored their production. While the task force used its best efforts to ensure the accuracy of the content, t
11、he task force, the Extruded Products Division, and The Aluminum Association do not warrant, guarantee, or otherwise assume any responsibility for the use of the information provided in any specic application. This publication, Understanding Aluminum Extrusion Tolerances, was originally written as a
12、supple- ment for a 30-min video with the same title. The section and page numbers used in the publication were intended as references to sections of that videotape; in using the publication by itself, those designations have no special significance. The videotape Understanding Aluminum Extrusion Tol
13、erances is stili avail- able for purchase from The Aluminurn Association at the address printed inside the front cover. Acknowledgement is made to Aluminum Association consultants Stan Benjamin and Paul V. Mara for valuable technical assistance with the project leading to this publication and the as
14、sociated videotape. Copyright The Aluminum Association Inc. Provided by IHS under license with AA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 05:28:01 MDTNo reproduction or networking permitted without license from IHS -,-,- - STD-AA SUP-1-ENGL 1995 Ob04500 001878
15、4 lT3 m APPENDIX Gap Width Inches 0.040-0.062 0.063-0.124 0.1 25-4.249 0.250-0.499 O .500-0.999 1 .000-1.99 2.000 and over i m l Extrusion Forms c.1-1 CLASS 1 CLASS 2 Group A Group B Group A Group B Alloysa Alloys Alloys 0 Alloys Ratio ) 2.0 1.5 2.0 1 .o 3.0 2.0 2.5 i .5 3.5 2.5 3.0 2.0 4.0 3.0 3.5
16、2.5 4.0 3.5 3.5 2.5 3.5 3.0 3.0 2.0 3.0 2.5 3.0 2.0 Hollow Shapes C.4 Solid Shapes C.5, C.6 Semihollow Shapes C.6, C.7, C.8 Definitions of Products n dctermining the general configurations of desired shapes, notc the several basic classifications: solids, semiholiow, hollow, etc. These shapes are ai
17、l pro- ducible, but for economic consideration, solid shapes are most economical with costs increasing for the hoiow shapes for both metal and tooling. The produc- ers engineering and design personnel can be of assis- tance in re-designing, if needed, shapes which will ful- fill the desired function
18、, yet reduce overall costs. How- ever, even the most intricate extruded shapes may Of- ten still be the most economic solution to your specific need. l ExffuSbn: An extrusion is a product formed by pushing metal through a die. xtnrded ShUp: An extruded shape is a wrought product that is long in rela
19、tion to its cross sectional dimensions and has a cross section other than that of sheet, plate, rod, bar, tube or wire. solid Extnrded ShUpe: Any exuuded shape other than a hollow or semiholiow shape. Example, Figure 1. Figure 1 EXtnrded Rod: A solid extrusion whose cross section is round, and whose
20、 diameter is 0.375-inch or greater. Smaiier sizes are classified as wire. Table 1 : Classification-Semihollow Extruded Shapes Copyright The Aluminum Association Inc. Provided by IHS under license with AA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 05:28:01 MDTNo r
21、eproduction or networking permitted without license from IHS -,-,- STD-AA SUP-1-ENGL 1995 W Ob04500 0038785 03T m Semihollow Shapes C.6 Figure 2 Typical Semihollow Extruded Shapes. Use Void Area D and Gap Width B or Void Areas C and D and Gap Width A, Whichever Results In Larger Ratio. Cbss I Semiho
22、llow Extruded Shape: A semihollow extruded shape of two voids or less which i n the area of the voids and surrounding metal thickncss is symmetrical abut the centeriine of the gap. Example, Figures 3 a n d 4. Figure 3: Typical Class 1, Semihollow Extruded Shape Class 2 Semihollow Extnrded Shcrpe: An
23、y semihoilow exmded shape other than Qass 1. Example, Figures 5 and 6. n Figure 5: Typical Class 2, Semihollow Nonsymmetrical Void, Symmetrical Surrounding Metal Thickness Figure 4: Typical Class 1, Semihollow Extruded Shape Figure 6: Typical Class 2 Semihollow Symmetrical Void, Non-symmetrical Surr
24、ounding Metal Thickness Copyright The Aluminum Association Inc. Provided by IHS under license with AA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 05:28:01 MDTNo reproduction or networking permitted without license from IHS -,-,- STD-AA SUP-1-ENGL 1795 Ob04500 0016
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