How an aeroplane is built . rpose, To the table of the machine attach amachine-vice, and in between the jaws laya rectangular bar of mild steel which hasbeen shaped all over. The length ofthe bar being not less than the length ofthe jaws, the size of this bar will dependon the size of the nuts to be castellated. This bar of steel may be a fewhundredthsof an inch less in width than the widthacross the corners of the nuts (see Fig. 31).This is for the nuts to rest on, to keep themup to the slitting-saw. For the purpose of holding, say, half a 177- M HOW AN AEROPLANE IS BUILTdozen nuts in between
How an aeroplane is built . rpose, To the table of the machine attach amachine-vice, and in between the jaws laya rectangular bar of mild steel which hasbeen shaped all over. The length ofthe bar being not less than the length ofthe jaws, the size of this bar will dependon the size of the nuts to be castellated. This bar of steel may be a fewhundredthsof an inch less in width than the widthacross the corners of the nuts (see Fig. 31).This is for the nuts to rest on, to keep themup to the slitting-saw. For the purpose of holding, say, half a 177- M HOW AN AEROPLANE IS BUILTdozen nuts in between the machine-vicejaws, in their correct position for slotting,we must prepare two pieces of angle steelwith vertical Vee slots cut in each of Vee slots are for the purpose ofgripping the corners of the nuts firmly,whilst they are being castellated. Owing to these Vee slots being requiredin the angle steel pieces, it will necessitatethem being made out of the solid bar, theangle for laying on the machine-vice jaws. PACK IIM& 1 PIECE J IG FOR HOLDING NUT5 TO BE SLOTTED Fig. 31. being either milled, planed, or shaped these two pieces of angle steel will besubject to considerable work, it will be aswell to make them at least | in. thick allover, and case-harden them. THE USE OF THE made the above jig for castellat-ing the nuts, all that has to be done is tofill up the new angle jaws with as manyi78 HOW AN AEROPLANE IS BUILT nuts as they have Vee slots in them andcarefully see that each nut beds downequally on the packing-up strips underthem. Tighten up the jaws firmly, fix theslitting-saw in the mandril, and adjust theheight of the milling machine table, andthereby regulate the depth of the slitting-saw cut in the nuts. Start the machine andthe cross-feed and lubricate the saw withthe cutting compound. By this means half a dozen nuts can bequickly slotted across two flats of each ofthem. As soon as this operation and cutis finished, stop the milling mac
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Keywords: ., bookcentury1900, bookdecade1910, bookidhowa, booksubjectairplanes
