Overview Written for the experienced engineer as well as the student, this comprehensive reference presents the fundamental aspects of jig and fixture design in. This book explains both basic principles and advanced designs and applications for today’s flexible systems and controlled machines. Chapters include. Poulto Presto JIG and FIXTURE DESIGN MANUAL ERRATA (Henriksen: JIG AND FIXTURE DESIGN MANUAL) Page 66 – Substitute the.
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The larger tolerances are for the smaller dimensions. AmazonGlobal Ship Orders Internationally.
Other equations, of an empirical nature, include numerical coefficients the values of which depend on dseign type of units used. Offset and misalignments, as discussed above, are eliminated by the use of conical tapered locators, because they do not require clearance but provide positive contact.
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Jig and Fixture Design Manual – Erik Karl Henriksen – Google Books
Locating the Part Rough Parts 7. Make sure of access to the “inner end” of parts with a press fit.
Would you like to tell us about a lower price? It is usually very suitable for parts punched from sheet and plate yet less suitable for forgings, partly because of the draft, partly because the contour where the flash has been trimmed off may be offset with respect to the forging body.
In the practical design process, however, one op- erates continuously with the part, and it is recom- mended that the part outline, or appropriate sec- tions in jig and fixture design handbook fixture sketches, should be drawn either in thin lines or, preferably, in colored lines.
It may be light, medium, or heavy. The face of the flange was already machined in a previous operation and permits, therefore, locating on four buttons 4 without generating a redundancy. Castings Small secondary parts such as hand knobs, jig and fixture design handbook arms, etc. One important purpose of a fixture is to eliminate this layout operation; the raw part usu- ally abd to the fixture without such lines, centers, or other markings, and fidture locating has to be done from the surfaces and contours as they exist.
Wear on Locators Wear is a complicated process and has been exten- sively studied. A common feature jig and fixture design handbook the configuration of pat- terns, and dezign also of castings, is the “draft,” which is a slightly tapered clearance applied in vary- ing degrees to all surfaces that would drag against the mold during pattern withdrawal.
The method can be used for raw parts such as cast- ings, welded parts, and forgings, where no great ac- curacy is required between the part contour and the surfaces to be jandbook. It may be found desirable to look for alternate solutions before the final decision is made.
Full text of “Jig and Fixture Design Manual”
Wear tolerances do qnd apply to center-to-center distances. Dirt space allowance is therefore required. They are simple and logical, and almost universal; exceptions to these rules may exist but they are rare, and usually occur only under special conditions.
Use the diamond-shaped cross section, where appropriate. Any conscientious jig and fixture design handbook duction man will select the widest tolerances that he can get away with, and the fixture designer should be desiyn of that. With two locating pins, make one pin longer than the other so the part is located on one pin at a time.
If a fourth or more point is needed for stability, make it adjustable or a jack type.
Jig and Fixture Design Manual
Stainless steel is also used for pur- poses where its lack of magnetic properties is of value, such as for separating elements in magnetic chucks and for backing bars in welding fixtures. Another equally important consideration is the avoidance of broken edges in castings and burrs on ductile parts. A normal prerequisite for the use of this method is that the part has an accept- able base surface on which it can rest in a stable po- sition in the jig.
The choice depends on size and weight of the jig. Check overall dimen- sions and the space within which the fixture is to be installed the tooling area.
The curing temperature is jig and fixture design handbook F to C. The design of these tools is, therefore, a task that challenges the designer’s creative imagination and draws heavily upon his ex- perience jig and fixture design handbook ingenuity.
The location of this bush- ing must be high enough to allow the jig to be un- loaded and reloaded while the drill is running. There- fore, desigh class of fit jig and fixture design handbook selected must be a clearance fit, equivalent to one of the tighter classes of these hanbdook. Jig and fixture design handbook pins are shown as cylindrical. At this and other design phases, the designer may consult ele- mentary lists of items to be considered.
Such parts involve large tolerances on the part contour, and for this reason, each marking is made with multiple lines to make sure that the markings are not totally obscured. When necessary, larger locators can be de- signed, but hanfbook no circumstances should the de- signer feel obligated to employ locators with ex- cessive bearing areas, chiefly because it is difficult to keep them free of chip fragments.