1 ) What do you mean by orthogonal cutting and constrained cutting? In orthogonal cutting, the principal innovative of the application is parallel to the horizontal plane perpendicular to The path of nourish motion.
In restricted trimming under regular cutting conditions Due to secondary plastic deformation fictional resistance during computer chip flow over the tool face, rubbing of the chip within the chip-tool user interface causes excessive The struggling forces and interface temp. Now in the event the contact span is decreased by mincing a secondary rake thereby developing a slim contact terrain the pushes and the interface temperature will decrease. The width of the land can be described as restricted get in touch with length as well as the process is named " Limited contact cutting”.
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Abhimanyu Kar
Roll No . 03036
2 .
Deduce the following romantic relationship
tan ОІ =
cos Оі 0 Оѕ в€’ sin Оі 0
Express the presumptions made
Coming from diagram it follows,
capital t tc AB = sama dengan sin ОІ cos(ОІ в€’ Оі Um ) or, tc cos ОІ cos Оі O + sin ОІ bad thing Оі U = big t sin ОІ в‡’ crib ОІ cos Оі Um + trouble Оі Um = Оѕ Оѕ= в‡’ cot ОІ cos Оі O sama dengan Оѕ в€’ sin Оі O в‡’ tan ОІ = cos Оі To Оѕ в€’ sin Оі O
Shear plane STOMACH Shear angle ОІ Rechtwinklig rake position Оі U Chip width t c Uncut density t
Presumptions 1 . The tool hint is sharpened (zero border radius) and the chip makes contact just with the rake face of the device. 2 . The cutting edge can be perpendicular towards the cutting velocity. 3. The deformation is definitely two-dimensional, i. e., zero side distributed occurs. 5. The deformation takes place really thin zone so that the deformation zone could possibly be reasonably showed by a planes (AB), known as the shear plane. 5. Continuous snacks without built-up edge happen to be formed. 6th. The workpiece material can be rigid, correctly plastic.
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Abhimanyu Kar
Roll No . 03036
three or more.
What does the computer chip reduction agent Оѕ show? What are the factors on what Оѕ is dependent?
The chip reduction agent is the quantitative measure of exactely deformed nick thickness for the undeformed 1 during a materials removal procedure if tc is deformed chip width and to is the undeformed chip density then, Оѕ=tc/t. The value of Оѕ indicates the types of chip manufactured in case of material rule operation. Оѕ depend upon which following elements: i. Rake angle (ОіO) Оѕ
ii.
Nose radius (r)
Оѕ
ОіO
iii. Cutting velocity (vc)
ur Оѕ
4. Coefficient of friction (Ој)
Оѕ
vc
Оѕ
v.
Uncut computer chip thickness
Вµ t
vi. Hardness vii. Tool function configuration
5.
State the benefits of managed contact trimming.
The advantages controlled cutting are: i. Not any built-up border (BUE) development. ii. Better surface surface finish. iii. Reduction of flank and crater wear, we. e. increase in tool life. iv. The interval between successive tool grinds raises. i. at the. tool running cost decreases. v. Slicing forces reduce, so gossip decreases. ni. Better reliability. vii. Cheap coolant can also be used. viii. Fairly low electrical power consumption.
a couple of
Abhimanyu Kar
Roll Number 03036
Sample Calculations
a few
Abhimanyu Kar
Roll Number 03036
Effect of true prey on shear angle
45
Shear angle (degrees)
40
thirty-five
30
twenty-five 0. 1 0. 15 0. two True nourish (mm) zero. 25 0. 3
Beta
Effect of true feed on shear strain and reduction rate
3 Chip reduction ratio/ strain
installment payments on your 5
2
1 . five
1 0. 1 zero. 15 zero. 2 The case feed (mm) 0. 25 0. 3
Reduction ratio
Shear tension
4
Abhimanyu Kar
Move No . 03036
Effect of slicing speed upon shear perspective
30
Shear angle (degrees)
25
twenty
15 zero 20 forty 60 85 100 Trimming speed (mm/min)
Beta
Effect ofcutting speed on shear strain and reduction percentage
5 Processor chip reduction ratio/ strain
some
3
two
1 zero 20 forty 60 eighty 100 Cutting speed (mm/min)
Reduction proportion
Shear pressure
5
