During orthogonal turning, the cutting speed, feed and depth of cut are set as 2 m/s, 0.2 mm/rev and 2 mm, respectively. The specific cutting energy (neglecting the effect of feed force on the total cutting power) is 2 J/mm3. The main cutting force (in N) is _____ . (Answer in integer)
Correct Answer: 800
Solution and Explanation
Top Questions on Machining parameters and material removal rate
- A CNC milling operation is carried out by moving the tool from the point A to point B in anti-clockwise direction to cut a slot of quarter circle with center at C, as shown. The coordinates of the points A and B are (0,0) and (10,10), respectively. All dimensions are in mm. If the feed rate at point P along x-axis is 6 mm/min, then the feed rate (in mm/min) at point P along y-axis is ______ . (Rounded off to 1 decimal place)
- GATE PI - 2024
- Manufacturing Processes II
- Machining parameters and material removal rate
- Electro-chemical machining is performed on a flat copper workpiece. If the material removal rate is \(2\ cm^3/min\) throughout the process, then the required current (in A) is ______ . (Rounded off to 1 decimal place)
Copper properties: Melting point = \(1085 °C\), density = \(9\ g/cm^3\), gram atomic weight = \(63\), and valency of dissolution = \(2\)
Faraday's constant = \(96500 C\)
Stefan-Boltzmann constant = \(5.67 \times 10^{-8} W/m^2-K^4\)- GATE PI - 2024
- Manufacturing Processes II
- Machining parameters and material removal rate
A cylindrical workpiece is turned using two different tools. Tool 1 has zero nose radius; the side and end cutting edge angles are \(20^\circ\) and \(10^\circ\), respectively. Tool 2 has a 0.5 mm nose radius. Both tools machine at a feed of \(0.2\ \text{mm/rev}\). The ratio of the ideal maximum height of unevenness on the surface produced by Tool 1 to that produced by Tool 2 is \(\underline{\hspace{2cm}}\) (round off to one decimal place).
- GATE PI - 2022
- Manufacturing Processes II
- Machining parameters and material removal rate
Questions Asked in GATE PI exam
A through hole of 10 mm diameter is to be drilled in a mild steel plate of 30 mm thickness. The selected spindle speed and feed for drilling hole are 600 revolutions per minute (RPM) and 0.3 mm/rev, respectively. Take initial approach and breakthrough distances as 3 mm each. The total time (in minute) for drilling one hole is ______. (Rounded off to two decimal places)
- GATE PI - 2026
- Machining Processes and Machine Tools
In a cold rolling process without front and back tensions, the required minimum coefficient of friction is 0.04. Assume large rolls. If the draft is doubled and roll diameters are halved, then the required minimum coefficient of friction is ___________. (Rounded off to two decimal places)
- GATE PI - 2026
- Machining Processes and Machine Tools
- Which one of the following casting defects is caused due to the supply of the molten metal through two gates?
- GATE PI - 2026
- Machining Processes and Machine Tools
- The relationship between the hoop stress \(\sigma_1\) and the longitudinal stress \(\sigma_2\) of a closed cylindrical thin-walled pressure vessel is
- GATE PI - 2026
- Machining Processes and Machine Tools
- Three principal stresses at a point in a material are 300 MPa, 250 MPa, and 100 MPa. If the yielding just starts at that point, the yield strength (in MPa) of the material as per Tresca criterion is ............
Answer: The yield strength lies between 199 to 201 MPa.- GATE PI - 2025
- Industrial and Production