Design of Weldments, Part A - download pdf or read online

By Blodgett O.

ISBN-10: 9994446002

ISBN-13: 9789994446001

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Additional info for Design of Weldments, Part A

Sample text

I"",xl":. chinery builders, is as follorvs: 1. assign an initial factor of safety of and 2. if a cast material. multiply Uy i r,,; 3; 3. if a brittle material, muitiply Uy anJ---' ;nd -^'-tr. if impact loacts, multiply by i. 2i For example. the factor of safery of the follow_ ing materials would be: 1, rolled steel 2. 3 3. 8 -+. 5. 0 6. engtir ofa mareriat. In other words, if the bar steel to fe ,""; ;;;;;;: sion member has an ultimate tensite strenctiot 90,000. dividing by the t""to" oti'*ouij give the allowable unit stress ""rui"" of 30,000 p"i to frJ used in design computatioos.

Fig. Use minimum root opening and inclrr6sd sngle in orter to reduce filler metal required (Fig. 18, top left), 4- On thick plate, uee dotble-V instead of single V to reduce tbe amotmt of weldmetal (Fig. 18, left). 5. Sonetimea a single weld may be usedto join tlree parts (Fig. 18, bottom left). 6. Reduce tbe convexifir of fillet welds. A 45o El€ctrod. nurt b. t! tg. 19 Design must ollow occess to ioint hr welding. a\ IrI l,o qvold plccins pi!. ioinr3 mll e rhct on. or rwo ddc or. c6lbl. or reld3 nGr b.

Use subassemblies and complete the welding final assembly. ea_q\ befo-re 1,1. Where possible, break the weldment into natural sections, so the welding of each can be balanced about its own neutral axis. 15. sothey may be more easily straighten;d be_ fore final assembll,of member. 4-12 / Desig n Approoch 1,2 list No' 13 WETDING PR,OCEDURE These checkpoints are primarily for guidance of weld shop personnel. Control of cost and quality, though, is a mutual concern ofboth Design and Production. on in the shop, and the production man must see that his experience is passed back to the designer.

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Design of Weldments, Part A by Blodgett O.


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