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dimensional accuracy

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Published: 01 February 2005
Fig. 1.1 Approximate values of dimensional accuracies achievable in various processes. [ Lange et al., 1985 ] More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400129
EISBN: 978-1-62708-316-4
..., dimensional accuracy, and stiffness as well as die change procedures. forming presses sheet metal forming EACH SHEET FORMING PROCESS is associated, in a practical sense, with at least one type of sheet forming machine or equipment. The sheet forming equipment varies by the rate at which energy...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400145
EISBN: 978-1-62708-316-4
...-crank mechanism and how gear ratios, component arrangements, and other design parameters affect slide motion. The chapter also explains how to assess load and energy requirements, time-dependent characteristics, and dimensional accuracy and discusses overload protection, shutheight adjustment, and slide...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040001
EISBN: 978-1-62708-300-3
... Abstract This chapter provides a brief introduction to manufacturing processes used to produce metal parts and how they differ in terms of achievable geometries, tolerances, surface finishes, and production rate. manufacturing process dimensional accuracy surface roughness 1.1...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200001
EISBN: 978-1-62708-354-6
... to be considered. The dimensional accuracy of a steel casting is dependent on the type and quality of the pattern. The foundry should be responsible for determining the type of pattern which will produce the highest quality part on their equipment. Types of Patterns Pattern equipment can be made of wood...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700225
EISBN: 978-1-62708-279-2
... and dimensional accuracy of stamped components. The development of production dies and the fine-tuning of the stamping process to produce high-quality parts with low scrap rate is a very expensive and time-consuming process. After production begins, disturbances to the process such as material property variations...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200173
EISBN: 978-1-62708-354-6
... process are: The required quality of the casting surface The dimensional accuracy of the casting The number of castings required per order The type of pattern and core box equipment needed The cost of making the mold(s) Molding processes can be divided into two main categories...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720293
EISBN: 978-1-62708-305-8
... with cast iron test plates have proved promising. Methods for Dimensional Inspection A number of techniques are used to determine the dimensional accuracy of castings. These include manual checks with micrometers, manual and automatic gages, coordinate measuring machines, and three-dimensional...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040107
EISBN: 978-1-62708-300-3
... Abstract Forging machines vary based on factors such as the rate at which energy is applied to the workpiece and the means by which it is controlled. Each type has distinct advantages and disadvantages, depending on lot size, workpiece complexity, dimensional tolerances, and the alloy being...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040319
EISBN: 978-1-62708-300-3
... forging, which yields parts with good dimensional tolerances. The current minimum dimensional error in practical cold forging is ±20 to 50 μm, while the error in machining has been reduced over the years to less than ±1 μm. For cold forging processes to compete with machining, the dimensional accuracy...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200078
EISBN: 978-1-62708-354-6
... Pattern delivery If the patterns are to be supplied by the buyer, the following additional information should be provided: Pattern mounting and rigging price Description of pattern services Pattern accuracy liability If the buyer accepts full dimensional responsibility for the casting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500273
EISBN: 978-1-62708-317-1
... of the master and slave tool so that the slave tool can act as a support tool during forming, and the control of dimensional accuracy of the parts, especially when using two synchronized robots. Fig. 13.4 Kinematic incremental sheet forming using two forming tools. Source: Ref 13.2 13.2 Equipment...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720049
EISBN: 978-1-62708-305-8
... CMMs Several different types of horizontal arm CMMs are available. As with all CMMs, the horizontal arm configuration employs three movable components moving along mutually perpendicular guideways. Horizontal arm CMMs are used to inspect the dimensional and geometric accuracy of a broad...
Image
Published: 01 April 2013
verifies the porosity; the smallest void that is visible is 0.4 mm (0.016 in.) in diameter. (d) Transverse slice through the counterbalance area also verifies porosity. Dimensional analysis of the piston walls is possible to an accuracy of ±50 μm (±0.002 in.). Courtesy of B.G. Isaacson, Bio-Imaging More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200164
EISBN: 978-1-62708-354-6
.... At the time of writing, this process has some limitations with respect to the production of steel castings. Dimensional Tolerances Perhaps, more than any other single factor, casting tolerances are affected by the quality of the pattern equipment. The dimensional accuracy of the pattern is most...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200206
EISBN: 978-1-62708-354-6
... in considering capability and tolerances is the ability to measure with accuracy and precision (repeatability and reproducibility). This chapter discusses the methods for measuring accuracy and precision. It describes the variation of process characteristics, capability indices in general use, and factors...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200133
EISBN: 978-1-62708-354-6
... quality, user friendliness, execution time, and cost. The most basic programs are Two-Dimensional PC driven. They are capable of performing routine measurements and calculations with considerable improvements in speed and accuracy. Programs such as AFS ORDER are based on Chovorinov’s rule relating...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.aacppa.t51140021
EISBN: 978-1-62708-335-5
... of candidate processes. Compromises in specified criteria are made to facilitate the use of the most cost-effective process. 3.2.1 Casting Design Design considerations include size, shape, complexity, wall thicknesses, and required dimensional accuracy. Parts with undercuts and complex internal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700177
EISBN: 978-1-62708-279-2
... to surface quality and dimensional accuracy problems for the stamped part. In addition, die wear requires the frequent replacement of the dies and this leads to downtime and production losses. Forming AHSS requires high forming loads and high contact pressures thereby causing elevated frictional forces...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720393
EISBN: 978-1-62708-305-8
... manufacturing for part acceptance and process control. The various types of tests included are: Dimensional evaluation Density measurements Hardness testing Mechanical testing NDT Dimensional Evaluation Dimensional accuracy of P/M sintered parts is determined with the same measurement...