MechanismLongmans, Green, and Company, 1905 - 408 páginas |
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Página 48
... stroke only , namely , as the table moves from left to right ; the return stroke , as the table moves from right to left , being an idle stroke . To economize time , the speed of return ought to be greater than the speed of cutting ; or ...
... stroke only , namely , as the table moves from left to right ; the return stroke , as the table moves from right to left , being an idle stroke . To economize time , the speed of return ought to be greater than the speed of cutting ; or ...
Página 51
... stroke must be a little longer than the desired cut . The length of the stroke is adjusted by varying the position of the piece R on the rod P , a second adjustable piece being acted on by the other end of the table , in order to get ...
... stroke must be a little longer than the desired cut . The length of the stroke is adjusted by varying the position of the piece R on the rod P , a second adjustable piece being acted on by the other end of the table , in order to get ...
Página 52
... stroke , valuable time is wasted during the return stroke . It is usual , therefore , to cause the return stroke to be made in quicker time than the cutting stroke . The speed of the table in the cutting stroke depends on the material ...
... stroke , valuable time is wasted during the return stroke . It is usual , therefore , to cause the return stroke to be made in quicker time than the cutting stroke . The speed of the table in the cutting stroke depends on the material ...
Página 53
... stroke , and on M during the A G G2 F2 FIG . 64.1 J return stroke . The pulley L is keyed to the same spindle , I , as the spur wheel H , whilst M is attached to a spur wheel , K , by a sleeve which rides loosely over I. When cutting ...
... stroke , and on M during the A G G2 F2 FIG . 64.1 J return stroke . The pulley L is keyed to the same spindle , I , as the spur wheel H , whilst M is attached to a spur wheel , K , by a sleeve which rides loosely over I. When cutting ...
Página 54
... stroke of the table be 4 feet , the time taken to perform the cutting stroke is ( neglecting the slipping of the belt at the beginning of the stroke ) one - fifth of a minute , and the time for the return = 0.0722 minute ; so that the ...
... stroke of the table be 4 feet , the time taken to perform the cutting stroke is ( neglecting the slipping of the belt at the beginning of the stroke ) one - fifth of a minute , and the time for the return = 0.0722 minute ; so that the ...
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Términos y frases comunes
actuating addendum circle angle angular velocity angular-velocity ratio arc of approach attached axis B.Sc belt bevel wheel block centripetal acceleration circular arc common normal connecting rod connecting-rod coupler crank arm crank pin crank radius crank shaft crosshead Crown 8vo curve cutter cutting cycloidal cylinder described diameter direction displacement distance draw driving ELEMENTARY ellipse engine equal equivalent crank fixed centre gear horizontal Illustrations intersect involute keyed kinematic lathe leading screw length lever line of centres line of stroke machine mandrel mean position meshes move number of teeth obliquity obtained oscillating P₁ P₁A P₂ parallel motion perpendicular pinion piston pitch circle pitch point plane pulley rack radii reciprocating piece relative represent the velocity revolution revolutions per minute roller rolling circle shape shown in Fig sliding slot spindle spur wheel straight line tool tooth trace transmitted turning pairs valve velocity diagram velocity ratio vertical whilst worm wheel
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