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Note: It is important to read the books by Boothroyd to understand the full method of DFMA. The DFMA method is to be combined with Value Analysis and Engineering to do product industrial engineering. In the note only attempt is made to make readers aware of issues raised and solutions proposed by DFMA method.
14. Design for Hot Forging 593
14.1 Introduction
14.2 Characteristics of the Forging Process
14.3 The Role of Flash in Forging
14.4 Forging Allowances
14.5 Preforming During Forging
14.6 Flash Removal
14.7 Classification of Forgings
14.8 Forging Equipment
14.9 Classification of Materials
14.10 Forging Costs
14.11 Forging Die Costs
14.12 Die Life and Tool Replacement Costs
14.13 Costs of Flash Removal
14.14 Other Forging Costs
References
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https://www.youtube.com/watch?v=opcy5QcL8v4
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Download the following report.
Design for Forging.
Publication Date1979
Personal AuthorConnolly, R.; Poli, C.; Boothroyd, G.
Page Count105
AbstractFactors that affect the cost of hot impression die forging and information regarding economical design of forged parts for this method of forming are outlined and discussed. Specific technical information regarding shape, temperatures, materials, and dimensional tolerancing is included. A classification system is outlined for use in designing hot impression die forged parts. This system reflects forging difficulty for a proposed design. Forging data indicates relationships between various important factors in forging design and cost; hence, these relationships are incorporated into the proposed classification system to indicate relative cost information regarding a forging design. Extensive diagrams, tables, and graphs are included together with a list of references.
Judith Kerkeling, Karsten Müller, and Dr. Rouven Nickel
A new tool design and die assembly developed in Germany has the ability to form flashless, near-net-shape forgings and pierce the workpiece all in one stroke.
One way of improving forging operations that helps achieve these key competitive factors is to reduce operating time and material usage during the forging process. Flashless precision forging permits both. Since flash does not occur, the requisite amount of raw material is reduced. The near-net-shape product formed omits the need for extensive machining.
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