GATE ME 2014 Set 1 | Advance Machine Tools Question 12 | Production Engineering

GATE ME 2014 Set 1

MCQ (Single Correct Answer)

-0.3

For machining a rectangular island represented by coordinates
$$P(0,0), Q(100,0), R(100,50)$$ and $$S(0,50)$$ on a casting using $$CNC$$ milling machine, an end mill with a diameter of $$16$$ $$mm$$ is used. The trajectory of the cutter center to machine the island $$PQRS$$ is

$$\left( { - 8, - 8} \right),\,\,\left( {108, - 8} \right),\,\,\left( {105,58} \right),\,\,\left( { - 8,58} \right),\,\,\left( { - 8, - 8} \right)$$

$$\left( {8,8} \right),\,\,\left( {94,8} \right),\,\,\left( {94,44} \right),\,\,\left( {8,44} \right),\,\,\left( {8,8} \right)$$

$$\left( { - 8,8} \right),\,\,\left( {94,0} \right),\,\,\left( {94,44} \right),\,\,\left( {8,44} \right),\,\,\left( { - 8,8} \right)$$

$$\left( {0,0} \right),\,\,\left( {100,0} \right),\,\,\left( {100,50} \right),\,\,\left( {50,0} \right),\,\,\left( {0,0} \right)$$

GATE ME 2012

MCQ (Single Correct Answer)

-0.3

A $$CNC$$ vertical milling machine has to cut a straight slot of $$10$$ $$mm$$ width and $$2$$ $$mm$$ depth by a cutter of $$10$$ $$mm$$ diameter between points $$(0, 0)$$ and $$(100, 100)$$ on the $$XY$$ plane (dimensions in $$mm$$). The feed rate used for milling is $$50$$ $$mm/min.$$ Milling time for the slot (in seconds) is

$$120$$

$$170$$

$$180$$

$$240$$

GATE ME 2008

MCQ (Single Correct Answer)

-0.3

For generating coon's surface we require

a set of grid points on the surface

a set of grid control points

four bounding curves defining the surface

two bounding curves and a set of grid control points