A hard metal ball of 10mm diameter is slid across a soft metal surface and produces a groove of 3mm width. The interfacial shear strength is one-tenth of the bulk shear strength of the softer metal. For an experimentally measured coefficient of friction of 0.45 for the contact, calculate the percentage contribution of adhesive and ploughing components to the total coefficient of friction.

Q: Explain why and how various factors influence springback in bending of sheet metals.

A: Plastic deformation in the material is always followed by the elastic recovery, since the elastic…

Q: If coefficient of friction µ in a rolling process is 0.5 and radius of roller is 1,000 mm, what is…

A: Given, Coefficient of friction = μ = 0.5 Radius of the roller = R = 1000 mm   Maximum possible…

Q: A 150-mm-long, 10-mm-diameter, high-strength cast iron rod is being reduced in diameter to 8 mm by…

A:

Q: A 300 mm thick slab is being cold rolled using roll of 600 mm diameter. If the coefficient of…

A: Given, Thickness of slab=300mm Diameter of roller,D=600mm Radius of roller, R=300mm Coefficient of…

Q: If the maximum chain speed for a sprocket having 19 teeth is 750 fpm, estimate its minimum chain…

A: The teeth are the small indentation in the periphery of the circular object. The distance measured…

Q: A strip with a cross section 120 mm x 6 mm is being rolled with 20% reduction area, using rolls of…

A:

Q: Example 3: A hydraulic forging press is capable of exerting a maximum force 1,000,000 N. A…

A:

Q: Explain the methods of reducing or eliminating springback in bending with proper diagram.

A: When a metal tends to return to its original shape after undergoing tension and compression, that…

Q: A strip with a cross section 120 mm x 6 mm is being rolled with 20% reduction area, using rolls of…

A: Given Strip = 120 mm X 6 mm Deduction = 20% Diameter = 400 mm Coefficient of friction = 0.1 To find…

Q: A strip of thickness 40 mm is to be rolled to a thickness 20 mm using a two-high mill having a rolls…

A: Given data,  H1= 40 mm  H2 = 20 mm  D= 200 mm

Q: A 2 mm thick metal sheet is to be bent at an angle of one radian with a bend radius of 100 mm. If…

A:

Q: * A cylindrical workpiece made of 1100-0 Aluminum that is 18 in high and 16 in in diameter and is to…

A: The forging force for open die forging is 1.3 MN.

Q: Explain the differences that you may observe between products made of sheet metals and those made by…

A: The main difference between the products made of sheet metals and those made by casting or forging…

Q: List manufacturing operations in which high friction is desirable and those in which l

A: Manufacturing Operation

Q: A strip with a width of 12 in. And 1 in. Thick is fed through a rolling mill with rolls of 10 in.…

A:

Q: Explain with the help of neat sketches.

A: Both caulking and fullering are the Operations used to make leak proof joint but they have some…

Q: Determine the direction of slip line at the workpiece tool interface in the condition of coulomb…

A: given; ⇒coefficient of friction (μ)=0.2⇒normal stress (σ)=100N/mm2⇒shear yield strength…

Q: 13mm diameter rod is to be reduced to 11mm diameter by drawing in a single pass at a speed of…

A:

Q: Calculate the bite angle when rolling plates 12 mm thick using work rolls 600 mm diameter and…

A: Given:∆h, Thickness reducing=3 mmR, radius of roller=300 mm

Q: Discuss what kind of friction model you would use for metal cutting.

A: Friction modeling:- Friction modelling apply to modeling the sliding friction interaction between…

Q: What is K-factor in sheet metal operation? Mention its value.

A:

Q: A steel ball slides against an aluminum flat surface at two different normal loads. At low normal…

A: Given   At low load   Coefficient of friction = 0.4            Groove width, r = 0.4 mm At high load…

Q: Explain the importance of lubrication in wire drawing

A: Wire drawing Wire drawing is the process in which metal is pulled out through die using tensile…

Q: In a stamping operation, a 2 mm thick stainless steel sheet with an ultimate tensile strenght of 900…

A:

Q: Explain and show in detail the production scheme and raw materials used for metal cutting disc…

A: Given Metal disc manufacturing To find Production scheme Raw materials

Q: the work metal has a flow curve defined by K=300MPa and n=0.2, and the coefficient of friction…

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Q: Calculate the bite angle when rolling plates 12mm thick using work rolls 600mm diameter and reducing…

A: Given data: hi=12 mm∆h=3 mmD=600 mm Need to determine the bite angle.

Q: A solid cylindrical work piece is reduced in height by an open die forging process using flat dies…

A: Given : initial diameter = 100 mm initial height = 60 mm final height = 0.85×60 = 51 mm coefficient…

Q: It is not possible to conduct rolling process without friction. Explain this statement

A: The friction force is the force that provides the torque required for the object to acquire the…

Q: Explain in detail the different types of friction

A: Below are the different types of friction:- Static friction Sliding friction Rolling friction Fluid…

Q: would it be difficult to use the machining processes that you have learnt in this course on…

A: Machinability refers to how easily a metal may be cut (machined), allowing the material to be…

Q: Q2. In a hot rolling process with 60 cm roll diameter and coefficient of friction is 0.75, maximum…

A:

Q: A hole with a diameter of 18 mm will be drilled in a sheet material with a thickness of 4 mm.…

A: D = 18 mm t = 4 mm Stress = 640 MPa Shear force (F) = ?

Q: A 150 mm long with 12.5 mm in diameter of a stainless steel rod is being reduced in diameter to 12.0…

A: Given:L=150 mmd1=12.5 mmd2=12.0 mmN=400 rpmf=200 mm/min

Q: A metal strip is to be rolled from an initial wrought thickness of 3.5 mm to a final rolled…

A: First calculate the Projected length of the deformation zone in horizontal plane and is given by…

Q: 21) In sheet metal forming the area to volume ratio is considered to be 22) In rolling, if the…

A: As per company guidelines subjected to solve only three sub parts at a time please repost the same…

Q: Estimate the roll force, F, and the torque for an AISI 1020 carbon-steel strip that is 200 mm wide,…

A: The draft attempted in this rolling operation is d=10mm-7mm   =3mm assuming coefficient of friction…

Thermal Properties of Materials

In mechanical engineering, the thermal property is represented as the physical quantity that is relevant to the application of heat. The thermal properties are evaluated by variations in any specific material due to low heat or high heat. The quantities that influence the thermal property of the materials are mass, density, temperature, and many others.