Q4: Answer the following questions: 1. Increasing cutting speed is undesirable at any time to raise the production rate. Why?
Q: Examples (homework) 1. In orthogonal cutting if the depth of cut is a 1.25 mm and chip thickness…
A: As per our guidelines, we are supposed to answer only first one question in case of multiple…
Q: . In an orthogonal cutting operationn, uncut chip thickness t is = 0.127 mm chip thickness t is =…
A:
Q: what are the three basic parameters (cutting variables) in the machining process? how to calculate…
A: The 3 basic parameters required in machining are : (a) Cutting velocity (Vc) – It provides the…
Q: In Orthogonal Cutting Model, why chip thickness after cut is greater than chip thickness before…
A: Orthogonal cutting is the type of cutting model in which the cutting tool is perpendicular to the…
Q: Determine the optimum cutting speed for an operation on a lathe machine using the following…
A:
Q: 9. Ceramics are the hardest tool materials in the world. 10. The smaller the cutting ratio, the…
A: Given: “Since you have posted a question with multiple sub-parts, we will solve the first three…
Q: Q1. What are parameters of cutting process? mention it with units.
A:
Q: Q3 Provided below is the Tool life data for cutting low carbon steel with HSS tool . Draw the tool…
A: The tool life equation in linear form can be expressed as,
Q: (4):- The surface of the product is smooth as the cutting speed is a---- a- High speed b- Low speed…
A: 4) Option A => High Speed ===>>> Which it gives the best surface finish. 5) Option A…
Q: The orthogonal cutting of steel is done with 10° rake tool with a depth of cut of 4mm feed rate of…
A: Merchant circle:
Q: In Orthogonal Cutting Model, why chip thickness after cut is greater than chip thickness before cut?
A: During cutting, the cutting edge of the tool is positioned a certain distance below the original…
Q: Using the Taylors tool life equation with exponent n = 0.5, if the cutting speed is reduced by 50%…
A: Given Data n=0.5 V2=0.5V1
Q: Question 4. The following data are available from orthogonal cutting experiments. The depth of cut…
A: When the cutting edge is perpendicular to the machined surface, the cutting executed is termed…
Q: It is required to reduce the thickness of cast iron workpiece with dimensions (L x w x t) of (230 mm…
A:
Q: If a fairing operation is executed at a rotational speed of 40.0 rev / min, the feed is 0.015 in /…
A: As the outer and inner diameter is not given so I am assuming it as D0 and Direspectivelya)…
Q: regrind and machining cost is Rs.10/min. Tool change time is 2 min. Optimum cutting speed (in m/min)…
A:
Q: Q4. A hole with 40 mm diameter an 50mm depth is to be drilled in mild steel component. The cutting…
A:
Q: The face milling cutter of D = 200 mm used to cut a block which is 200 mm = H, 1=480 mm, if f- 0.7…
A: Machine time is the ratio of length divided by cutting speed. Here, Length = length of block +…
Q: Q5: B: Peripheral milling is performed on the top surface of a rectangular work part that is 300 mm…
A: The material removal rate is the amount of material removed per min. It is the function of the area…
Q: 22.36 Referring to Table 22.1, state which tool materials would be suitable for interrupted cutting…
A: Tool materials would be suitable for interrupted cutting operations :-
Q: In a turning operation on cast iron (150 BHN), the cutting speed is 340 ft/min, feed is 0.06 in/rev,…
A: Given data as per question Cutting speed = 340 ft/min Feed =0.06 in/rev Depth of cut =0.05…
Q: Question 3. State whether or not the following statements are true, explaining your reaso 3.a. For…
A: (a) The given statement is true . To exhibit that for a comparative shear point, there are two rake…
Q: Q.4 (i) Find the time required for taking a complete cut on a plate 600 × 900 mm², if the .cutting…
A: As per the bartleby policy we can solve the only first question from the multiple questions. Q.4 (i)…
Q: Since the cutting plane angle is 9.5°, the cutting depth is 0.4 mm, the chip thickness is 2.9 mm,…
A: 1.We know that rack angle=Cutting plane angle=9.50
Q: The workpiece of size o 50 mm x 90 mm length is to be reduced to o 42 mm x 85 mm. If the depth of…
A: We have provided data from the question, Initial diameter= 50 mm; Initial length= 90 mm Final…
Q: Assume that, in orthogonal cutting, the rake angle is 20 and the friction angle is 35 at the…
A: Given data Rake angle, α=20 friction angle for case 1 friction angle for case 2
Q: Why are tool temperatures low at low cutting speeds and high at high cutting speeds?
A: Solution:
Q: b) An orthogonal cutting operation is being carried out under the following conditions: depth of…
A: As per our guidelines we have to answer one question only. So, I am answering (b).So, post the…
Q: Q4/ Answer only 6 (six) of the following 1) Some of Cutting tools are coated with (carbides,…
A: These questions are based on the concept of manufacturing processes.
Q: Q) An engine lathe is used to turn a cylindrical work part 150 mm in diameter by 500 mm long.…
A: GIVEN: D=150mm L=500mm F=0.3mm/rev d=3mm Cutting speed, V=2.5m/s=2500X60=150000mm/min a) CUTTTING…
Q: If shear strength is 6000 kg/cm2, width of cut is 10mm, cutting speed is 30 m/min, coefficient of…
A: Given:shear strength,ζ=6000 Kg/cm2 =6000*9.8110-4ζ=588.6 MPab=10 mmVelocity of cutting,V=30…
Q: Which of the following statements about cutting variables for finishing cuts is true? Finishing cuts…
A: Solution:
Q: In orthogonal turning of low carbon steel pipe with principal cutting edge angle of 90°, the mair…
A: Given:Rake angle,α=0cutting force, Fc=1000 Nfeed force, Ft=800 Nshear angle,ϕ=25o
Q: In Orthogonal Cutting Model, why chip thickness after cut is greater than chip thickness before
A: In orthogonal cutting the chip thickness is always greater than the uncut chip thickness.
Q: Why is it not always advisable to increase the cutting speed in order to increase the production…
A: It is required to justify given statement
Q: For straight turn of a 6 x 1.1-inch dia. into 1in finished diameter material. What is the time…
A: Given Data: Feed rate, f=5 inch/sec Depth of cut, d=0.02 inch
Q: State whether or not the following statements are true, explaining your reasons: (a) For the same…
A: a) For the same shear angle, there are two rake angles that give the same cutting ratio,…
Q: Write down the steps required to proof the mathematical relation for SHEAR PLANE ANGLE in Orthogonal…
A:
Q: 16- The outside diameter of a cylinder made of titanium alloy is to be turned. The starting diameter…
A: Givend=400mmf=0.35mm/revL=1100mmn=0.24C=450
Q: 2 1.63 With a carbide tool, the temperature in a cutting operation is measured as 650K when the…
A: Given: feed = 0.05 mm/rev T1=650 K
Q: What is the cutting ratio? Is it always less than 1?explain
A: Cutting ratio (r): Cutting ratio is defined as the ratio of thickness of metal before cutting that…
Q: 5. What are the adverse effects of tool wear in cutting processes?
A: As per the company policy, we are restricted to solve one question at a time. Please ask other…
Q: Example 4.2.4: In testing operation for two cutting tools from the same material, found that first…
A: Given data:
Q: Problem 10.21 Estimate the time required for one complete cut on a workpiece of length 350 mm and…
A:
Step by step
Solved in 2 steps with 2 images
- 3) Turning: A turning operation is to be adopted under the following machining conditions: Cutting speed: V = 75 m/min Feed rate: f= 0.25 mm/rev Depth of cut: a = 1.75 mm External workpiece diameter: Do = 50 mm Determine: a. The final workpiece diameter b. The rotational speed of the workpiece c. The tool feed rate expressed in m/min d. The material removal rate mm³/min e. The specific energy of the material assuming that the measured cutting force is F= 750 N. Knowing the specific energy, which of materials from the table below could the workpiece be composed? Approximate Specific-Energy Requirements in Cutting Operations SPECIFIC ENERGY* MATERIAL Aluminum alloys Cast irons Copper alloys High-temperature alloys W-s/mm³ 0.4-1.1 1.6-5.5 1.4-3.3 3.3-8.5 0.4-0.6 4.9-6.8 3.8-9.6 3.0-5.2 2.7-9.3 3.0-4.1 hp-min/in³ 0.15-0.4 0.6-2.0 0.5-1.2 1.2-3.1 0.15-0.2 1.8-2.5 1.1-3.5 1.1-1.9 1.0-3.4 1.1-1.5 Magnesium alloys Nickel alloys Refractory alloys Stainless steels Steels Titanium alloys * At…Q1:- Put a mark of True or false for below:- (a):- The milling cutting tool has a single cutting edge? (b):- At the break-even point, the total revenue equals the total cost? (c):- The right-hand rule is used to define machine axes? (d):- Design error is a simple mistake? (e):- The quality of products is poor in mass production? (f):- Allowances must be left before turning? (g):- Up-ward milling is better than down-ward milling?In the machining operation with orthogonal cutting, the cutting plane angle is 9.5°, the cutting depth 0.4 mm, chip thickness 2.9 mm, cutting width 3.1 mm, shear strength 185 MPa in the process; a) Find the rake angle (α). b) Find the shear deformation (γ). c) Find the shear force. (Note: The shear force is 1.4 times the thrust.)
- Question: Determine the optimum cutting speed for an operation on a Lathe machine using the following information: Tool change time: Tool regrinds time: 3 min Machine running cost Re.0.50 per min Depreciation of tool regrinds Rs. 5.0 The constants in the tool life equation are 60 and 0.2 3 minA cylindrical mild steel work piece of Ø55 X 200mm undergoes a turning operation on a lathe machine to reduce the diameter to Ø 45mm. The cutting parameters are 23 m/minute, 0.3 mm/ revolution and 0.5 mm are cutting speed, feed and depth of cut respectively. Determine the following. i) Time for single pass (minutes). ii) Find number of passes required to reduce the diameter from Ø55 to Ø45mm. iii) Total time required to complete the turning operation in minutes (Tfinal).2) State whether or not the following statements are true for orthogonal cutting, explaining your reasons: a. For the same shear angle, there are two rake angles that give the same cutting ratio. b. For the same depth of cut and rake angle, the type of cutting fluid used has no influence on chip thickness. c. If the cutting speed, shear angle, and rake angle are known, the chip velocity can be calculated. d. The chip becomes thinner as the rake angle increases. e. The function of a chip breaker is to decrease the curvature of the chip.
- Consider a milling process, where a pocket with width (X) of 400mm, Length (Y) 300mm, and depth (z) of 15 mm. The cutting tool is a 12 mm diameter flat end mill with 4 cutting edges. For some reason, the tool can be radially immersed in the material at most 50% of the tool diameter. The spindle speed is selected as 2000 rpm, where the max allowable axial cutting depth is 2.5 mm. a) Calculate the number of total cutting steps, indicating which feed direction would you prefer x or y. It may be preferred to have feed rate can be along X direction Total # of cutting steps: If feed direction is along X, the total number of cutting steps is 294 b) Calculate the minimum achievable cycle time if the feed rate is 0.15 mm/rev/tooth. Approx cycle time: 98 minutesTask 4 Here students need to calculate (a) The cutting speed (b) Turning time (c) Amount of material removed. For a specimen as shown below, if spindle rotates at N = 360 rpm, number of pass = 03, feed rate= 0.2mm/rev, if density of material=7.85× 10-6 Kg/mm³. Appendix Volume for Cylinder = rr?h Volume of frustum= nh (a?+b²+ab)/3 radii 'a' & b' height(Length) 'h'. b-a Taper angle : = tan20 h TDN Cutting speed:V : meters/min 1000 Where: V = Cutting speed in Meter/minute. T= 3.14 D = Diameter of work piece in mm N = rpm Cutting Time Length of the job to be turned NO.of cuts Time to turn mins. Feed/Rev rpm Amount of Material Removed = Original Mass – Machined Mass Original Size of Component 380 mm Machined Component 80 mm 100 mm 120 mm 6 20mm + 25mm + 40mm + 25mm 030mmWrite TRUE is the statement/s is True. If the statement is false, identify the word/s that makes the sentence incorrect and write its corresponding correct answer. 7. In planning, the tool travels along the workpiece during the removal of the material on the workpiece. 8. The factors that can be manipulated in cutting process are cutting speed, feed and depth of cut. 9.In thermally assisted machining, the tool is heated which reduces the required cutting force.
- Q1. (a). List any two criteria that compares a Numerical Control (NC) and Computer Numerical Control (CNC) machine tool. (b). A hole of 30 mm diameter and 75 mm depth is to be drilled. The suggested feed is 1.3 mm per rev and the cutting speed is 62 m/ min. assuming tool approach and tool overtravel as 6 mm, determine: i. spindle rpm ii. feed speed iii. cutting time iv. material removal rateb) An orthogonal cutting operation is performed using a rake angle of 15°, and having a chip thickness before the cut = 0.3 mm and width of cut = 2.5 mm. The chip thickness ratio is measured after the cut to be 0.55. Determine the following: i) the chip thickness after the cut, ii) shear angle, iii) friction angle, iv) coefficient of friction, and v) shear strain.Determine the optimum cutting speed for an operation on a lathe machine using the following information: Tool change time 3 min Tool regrind time 3 min Machine running cost Re. 0.50 per min Depreciation of tool regrind Re. 0.50 The constants in the tool life equation are 60 and 0.2.