Design for Manufacturability Handbook by James Bralla

By James Bralla

From uncooked fabrics ... to machining and casting ... to meeting and completing, the second one version of this vintage consultant will introduce you to the rules and systems of layout for Manufacturability (DFM)?the artwork of constructing fine quality items for the bottom attainable production expense. Written via over 70 specialists in production and product layout, this replace positive factors state of the art strategies for each level of manufacturing?plus completely new chapters on DFM for Electronics, DFX (Designing for all fascinating attributes), DFM for Low-Quality construction, and Concurrent Engineering.

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The process is suitable for very large parts, up to 4 m in diameter. Complex shapes are possible, but concentric symmetrical shapes are best. The process is chiefly used to compress, expand, or form tubular shapes, usually in assembling a tubular part with another part. Occasionally flat material can also be formed with this method. 25 mm. 3 mm. 3 mm. 13 Output rates are low, so unit labor costs are high. However, tooling costs are much lower than for conventional forming methods. The process is most economical for limited-quantity production.

Only parts symmetrical about an axis can be produced. Reentrant angles are difficult or not feasible. Labor content is higher than in stamping. Improved surface finish and squareness of sheared edges. Parts have higher dimensional accuracy and better flatness. Suitable for complex parts with a high degree of forming. Reverse and overlapping bends are feasible. Very low tooling costs and short lead times make the process attractive for short runs, prototypes, etc. Surface finish is good. Wall thickness must be essentially uniform.

Any use is subject to the Terms of Use as given at the website. Wire parts made on four-slide machines can be very complex with multiple multidirectional bends. Sizes range from miniature instrument springs to large coil and flat springs for construction and mining equipment. Circular parts range from 6 mm to 4 m in diameter, although the more common maximum sizes are considerably smaller. Relatively simple hemispherical, conical, or cylindrical shapes are most common, but reentrant shapes are possible.

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