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Download Design of Weldments, Part B by Blodgett O. PDF

By Blodgett O.

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Extra resources for Design of Weldments, Part B

Sample text

However, in a thick-walled container generated by a figure of revolution the decreasing variance ofhoop stress from the inner surface to the outer surface of the shellwailmustbe considered. s for calculating the stresses in two common thick-walLed cylinders. Ln the first condition, the inte rnal pre s s ure parallel to ihe siructural (longitudinal) aris is balanced bythe external force against the moving piston and by the resistance of the cylinder's support, and the resultant longitudinal stress (o-{,) is zero.

The underside of a welded steel base for a canmaking machine is shown at D. Doublediagonal bracing was used because ofthe extreme resistance against twisting that was required. In another method of producing double diagonal bracing, E, bracing is formed from steel stripin a bend brake. The lever at F is from a packaging machine which must be rigid but light in weight. It makes use of single diagonal. bracing. es, frames, brackets, Ievers, etc. By the use of arc welding the engineer has complete freedom of design and can economically use a pattern of braces which will produce the section properties required.

B is made of h 'plate, with three of its . Design -oges anged over and two formed t2',plates inserted for corners. For additionaltorsio[aI resistarrce. re inserted at 45u to form dia_ gonal bracing; these also tie into the bearine hubs and stiffen them. This frame weighs 885 lbi. Design C uses two %"side plates flame_cut to shape. These are welded directly to the l" x g,' base plate and joined all the way around the other three sides by Va" x4" flat bar. Thick-walled tubine is inserted ^between the two side plates and weldel in place to provide for the bearings and to tie the frame together.

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