A 12" through hole is to be drilled in a 1 inch thick steel plate. A standard twist drill having a nose angle of 120 degrees is to be used. The drill press is set to operate at a cutting speed of 20 feet per minute and a feed of 0.010 ipr. What is the machining time required to drill the hole?

A 12" through hole is to be drilled in a 1 inch thick steel plate. A standard twist drill having a nose angle of 120 degrees is to be used. The drill press is set to operate at a cutting speed of 20 feet per minute and a feed of 0.010 ipr. What is the machining time required to drill the hole?

Precision Machining Technology (MindTap Course List)

2nd Edition

ISBN:9781285444543

Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Chapter4: Drill Press

Section4.1: Introduction To The Drill Press

Problem 3RQ: Explain how the size of an upright drill press is determined.

See similar textbooks

Similar questions

Calculate the machining time to drill four 20 mm diameter holes and one 50 mm diameter central hole in the flange as shown below. Take cutting speed 20 m/min, feed for 20 mm drill 0.2 mm/rev, and for 50 mm drill feed is 0.6 mm/rev, the point angle is 120°? VIVER 20xA 200 D100 SYLON 50
A twin-spindle drill simultaneously drills one ½-in hole and one ¾" through a 1" wide work piece. Both holes are twist drill with 118° point angles. cutting speed for material is 230 ft/min. The rotation speed of each spindle can be configured individually. The feed rate of both holes must be set to the same value, since both spindles go down at the same speed. The forward speed is set in such a way that the speed total metal removal does not exceed 1.50 in3 /min. Determine: a) the velocity maximum feedrate (in/min) that can be used, b) the individual feedrates (in/rev) that result in each hole and c) the time required to drill the holes.
A mild steel specimen of Initial diameter of 53.5 mm is turned to final diameter of 47 mm for an initial length of 154 mm on a lathe machine. Using the given data find the following. (i) Feed of 0.4 mm/rev & Depth of cut is 0.5 mm (ii) During machining the tool's approach length is 5 mm, over run length is 2mm (iii) Total time required to complete the turning operation is 59.6 minutes
A mild steel specimen of Initial diameter of 53.5 mm is turned to final diameter of 47 mm for an initial length of 154 mm on a lathe machine. Using the given data find the following. (i) Feed of 0.4 mm/rev & Depth of cut is 0.5 mm (ii) During machining the tool's approach length is 5 mm, over run length is 2mm (iii) Total time required to complete the turning operation is 59.6 minutes (a) Find number of passes to finish the entire turning operation ( (b) The actual length of the turning operation in mm ('
A mild steel specimen of Initial diameter of 51.5 mm is turned to final diameter of 48 mm for an initial length of 151 mm on a lathe machine. Using the given data find the following. (i) Feed of 0.1 mm/rev & Depth of cut is 0.5 mm (ii) During machining the tool's approach length is 7 mm, over run length is 2mm (iii) Total time required to complete the turning operation is 48.8 minutes (a) Find number of passes to finish the entire turning operation (b) The actual length of the turning operation in mm ( (c)The time required to complete one single turning operation in minutes (d) Spindle speed in rpm
The part in Figure 1 is to be drilled on a turret-type drill press. The part is 15.0 mm thick. Threedrill sizes will be used: 8 mm, 10 mm, and 12 mm, which are to be specified in the part programby tool turret positions TO1, T02, and T03. All tooling is high speed steel. Cutting speed = 75mm/min and feed = 0.08 mm/rev. Use the lower-left corner of the part as the origin in the x-y axissystem. Write the part program in the word address format using absolute positioning.
Handwritten solution recommended. (1) A twist drill bit is used to drill a hole of diameter 2.0 at 4578.1 rpm at a feed rate of 2.5 in/min. Calculate the MRR in in^3/min. Take "pi" = 3.14. Round your answer to the nearest tenth.
A mild steel specimen of Initial diameter of 32.5 mm is turned to final diameter of 25 mm for an initial length of 154 mm on a lathe machine. Using the given data find the following. (i) Feed of 0.3 mm/rev & Depth of cut is 0.5 mm (ii)During machining the tool's approach length is 6 mm, over run length is 3mm (iii) Time required to complete one single turning operation is 2.3 minutes (a)Find number of passes to finish the entire turning operation (b) Total time required to complete the turning operation in minutes (c) Spindle speed in in rpm (d) Cutting speed in m/minutes
A mild steel specimen of Initial diameter of 30.5 mm is turned to final diameter of 27 mm for an initial length of 153 mm on a lathe machine. Using the given data find the following. (i) Feed of 0.4 mm/rev & Depth of cut is 0.5 mm (ii)During machining the tool's approach length is 5 mm, over run length is 2mm (iii) Time required to complete one single turning operation is 3.5 minutes (a)Find number of passes to finish the entire turning operation (b) Total time required to complete the turning operation in minutes
A mild steel specimen of Initial diameter of 30.5 mm is turned to final diameter of 27 mm for an initial length of 153 mm on a lathe machine. Using the given data find the following. (i) Feed of 0.4 mm/rev & Depth of cut is 0.5 mm (ii)During machining the tool's approach length is 5 mm, over run length is 2mm (iii) Time required to complete one single turning operation is 3.5 minutes (c) Spindle speed in in rpm (= (d) Cutting speed in m/minutes(=
What is the cutting speed of turning in the unit of m/min, when main axis spindle speed is 2,409 rpm and external diameter is 86mm ? Answer in 2 decimal points. Calculate the theoretical spindle rotational speed in rpm required to drill a 1 mm hole in copper using high speed steel drill. The recommende cutting speed is as following. The thickness of the copper plate is 24. (Leave the answer in numerical value, no need to key in 'rpm') Typical cutting speeds (m/min) High speed steel Material Tungsten carbide Aluminum 100 500 60 330 Copper Hard brass 45 230 Bronze 35 180 Mild steel 28 250 Cast iron 20 160
solve