What is an orthogonal cutting operation?
What is an orthogonal cutting operation? Orthogonal cutting involves the use of a wedge-shaped tool in which the cutting edge is perpendicular to the direction of speed motion into the work material.
What are the effects of lowering the friction at the tool chip interface on the mechanics of cutting operation?
But, at the same time, this reduction in friction causes the shear angle to become larger and consequently, heat coming from plastic deformation is also reduced. Low friction generally means low operating temperature, low rate of wear of the tool, and low cutting forces.
Why is the orthogonal cutting model useful in the analysis of metal machining?
Orthogonal cutting is useful in the analysis of metal machining because it simplifies the rather complex three-dimensional machining situation to two dimensions. In addition, the tooling in the orthogonal model has only two parameters (rake angle and relief angle), which is a simpler geometry than a single-point tool.
What distinguishes machining from other manufacturing processes?
21.2What distinguishes machining from other manufacturing processes? Answer. The reasons include the following: (1) it is applicable to most materials; (2) it canproducea variety of geometries to a part; (3) it can achieve closer tolerances than most otherprocesses; and(4) it can create good surface finishes.
What are the two principal aspects of cutting tool technology?
The two principal aspects of cutting tool technology are (1) tool material and (2) tool geometry.
What are the two principal aspects of quality?
Answer. The two quality aspects are (1) product features and (2) freedom from deficiencies.
Which type of cutting tool wear is preferred?
Flank wear This is the most common type of cutting tool wear and the preferred wear type, as it offers predictable and stable tool life. Flank wear occurs due to abrasion, caused by hard constituents in the workpiece material.
What is tool wear and its types?
Tool wear is the gradual failure of cutting tools due to regular operation. Tools affected include tipped tools, tool bits, and drill bits that are used with machine tools. Types of wear include: flank wear in which the portion of the tool in contact with the finished part erodes.
What are the different types of wear?
There are four basic types of wear: adhesive, abrasive, corrosive, and surface-fatigue.
What does machinability mean?
Machinability is the ease with which a metal can be cut (machined) permitting the removal of the material with a satisfactory finish at low cost. Other important factors are operating conditions, cutting tool material and geometry, and the machining process parameters.
What are the factors that affect tool life?
Chemical properties of carbon and alloy steel work material that can affect tool life include:
- Chemical composition.
- Microstructure.
- Grain Size.
- Hardness.
- Yield Strength.
- Tensile Strength.
- Degree of heat treatment of the material.
- Finish required on the product.
Which of the following cutting tool has highest hot hardness?
Explanation: Carbides are very hard and have very good red hot hardness property and hence most suitable for machining of hard and brittle material. Explanation: HSS are very tough and fracture resistance and suitable for high positive rake angle tool. With an increase in percentage of cobalt toughness increases.
Who invented the first CNC machine?
Richard Kegg
Who was the first machinist?
David Wilkinson
Is machinist a dying trade?
Yes, machining (in the U.S.A.) is a dying trade.
What is a master machinist?
A master machinist operates computer-controlled machinery in the manufacturing industry. A master machinist can read blueprints and set up their machines using CNC technology to automate the cutting and fabrication process. They may be able to work in fields such as aerospace manufacturing with specialized training.
What is a machinist 1?
A machinist is a tradesperson or trained professional, who not only operates machine tools, but has the knowledge of tooling and materials required to create set ups on machine tools including, but not limited to milling machines, grinders, lathes, and drilling machines.