Skema Answer Manufacturing Proces 4

Powerful Essays
FACULTI OF MECHANICAL ENGINEERING
UNIVERSITI MALAYSIA PAHANG
BMM3643 (Sem II 2012/13)

Assignment #4

1. a) What distinguishes machining from other manufacturing processes? b) What is a machining center? c) How important is the control of cutting-fluid temperature in operations performed in machining centers? Explain. (8 marks) * Answer. a) In machining, material is removed from the workpart so that the remaining material is the desired part geometry. b) A machining center is a CNC machine tool capable of performing multiple types of cutting operations involving rotating spindles (e.g., milling, drilling); the machine is typically equipped with automatic toolchanging, pallet shuttles to speed workpart changing, and automatic workpart positioning. c) The control of cutting-fluid temperature is very important in operations where high dimensional accuracy is essential. As expected, the fluid heats up during its service throughout theday (due to the energy dissipated during machining), its temperature begins to rise. This, inturn, raises the temperature of the workpiece and fixtures, and adversely affects dimensionalaccuracy. Temperature-control units are available for maintaining a constant temperature in cutting-fluid systems.

2. a) What are the primary considerations in tool selection? b) What is the advantage of a helical-tooth cutter over a straight-tooth cutter for slab milling? c) What are the consequences if a cutting tool chips? (8 marks) * Answer. a) Primary considerations in tool selection are i) What material is going to be machined ii) what process is going to be used, iii) what are the cutting speeds, feeds, and depths of cut needed, iv) what is the tool material, v) what are lubricants going to be used. b) Helical toothed cutters enter the workpiece progressively.

You May Also Find These Documents Helpful

  • Good Essays

    working,and hot working in terms of the melting point of the material being formed. b) Indicate some of the advantages of cold working relative to warm and hot working. c) What are some of the negative aspects of hot working? (8 marks) Answer a) The temperatures required for hot working generally exceed 0.6 times the melting point of the material on an absolute temperature scale. Cold working generally requires temperatures below 0.3 times the melting point, and warm working is the…

    • 1440 Words
    • 6 Pages
    Good Essays
  • Better Essays

    a) What metals are frequently cast into products? b) What materials are used to produce the expendable patterns for investment casting? c) Explain why a casting may have to be subjected to various heat treatments. (8 marks) Answer a) Cast parts can range in size from a fraction of an inch and a fraction of an ounce to over 30 feet and many tons. Moreover, casting can incorporate complex shapes, hollow sections or internal cavities, and irregular curved surfaces.…

    • 1350 Words
    • 6 Pages
    Better Essays
  • Good Essays

    With some skema, one might know that TOMS is a company that sells shoes and with every sold pair of shoes, TOMS will give another pair to a child who is growing up without the protection for their feet. In this advertisement, TOMS is both selling its shoes and helping children in third world countries. The three modes of persuasion this commercial uses are ethos, pathos and logos. In order to convince readers to buy TOMS shoes, the advertisement presents ethos by making the audience see the company…

    • 516 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    Chapter 4 Answers

    • 488 Words
    • 2 Pages

    vary over the life cycle of a product. Answer: TRUE 2. A time-series model uses a series of past data points to make the forecast. Answer: TRUE 3. Cycles and random variations are both components of time series. Answer: TRUE 4. One advantage of exponential smoothing is the limited amount of record keeping involved. Answer: TRUE 5. If a forecast is consistently greater than (or less than) actual values, the forecast is said to be biased. Answer: TRUE Multiple Choice Questions…

    • 488 Words
    • 2 Pages
    Satisfactory Essays
  • Satisfactory Essays

    tutorial 4 answers

    • 552 Words
    • 3 Pages

    TUTORIAL 4 – DISCRETE DISTRIBUTIONS Question 1 An experiment consists of picking a card at random from a standard deck of cards and replacing it. If this experiment is performed 12 times, what is the probability that you get: (a) exactly 2 aces; (b) exactly 3 hearts; (c) more than 1 heart. Solution Let n = 12, the no of experiments. (a) Let p = probability of obtaining an ace in an experiment of picking a card at random from a standard deck of cards; and = 4/52 = 1/13…

    • 552 Words
    • 3 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Quiz 4 answers

    • 454 Words
    • 3 Pages

    that does not. true false Question 3 2 / 2 pts In general, firms want their Times Interest Earned ratio to be as low as possible.<br> In general, firms want their Times Interest Earned ratio to be as low as possible. true false Question 4 2 / 2 pts A company whose Total Asset Turnover ratio is 1.0 is using its assets more efficiently than one whose ratio is 2.0.<br> A company whose Total Asset Turnover ratio is 1.0 is using its assets more efficiently than one whose ratio is 2.0. true…

    • 454 Words
    • 3 Pages
    Satisfactory Essays
  • Good Essays

    State, Government and Law 1. State An entity can be regarded as a state if it satisfies the following essentials of statehood 1. Population 2. Territory 3. Government 4. Sovereignty or Supremacy State can be unitary (only one govt. throughout the territory); federal(distribution of powers between central and state governments); monarchy(hereditary king as the ruler); republic(the head of the state is not a monarch but an elected person) etc. The ultimate aim of the state is…

    • 4465 Words
    • 18 Pages
    Good Essays
  • Satisfactory Essays

    Answers to Quiz #4

    • 627 Words
    • 3 Pages

    change in government spending and the change in taxes_________________________ iii. Consumption __________decreases_______________________ iv. Investment ______________decreases_____________________ 2. Use the following information to answer this set of questions. An economy can be described by the following equations: C = 200 + 0.75(Y – T) I = 200 – 25r G = 100 and is constant and exogenously determined T = 100 and is constant and exogenously determined…

    • 627 Words
    • 3 Pages
    Satisfactory Essays
  • Good Essays

    In the recent years Redlands Manufacturing, Inc. has been audited and subjected to constant fiscal penalties due to fraudulent financial reporting on the companies part. Due to the following incorrect procedure the company has had to paid a tremendous amount fines: Channel Stuffing: Incorrect Practice: For financial gain, Redlands Manufacturing, Inc. shipped equipment to vendors with out a full merchant agreement and agreed to except returned merchandise back if it was not sold by yearend…

    • 695 Words
    • 3 Pages
    Good Essays
  • Satisfactory Essays

    accounting week 4 answers

    • 469 Words
    • 5 Pages

    1. Duggan Company applies manufacturing overhead to jobs on the basis of machine hours used. Overhead costs are expected to total $276,100 for the year, and machine usage is estimated at 125,500 hours. For the year, $291,988 of overhead costs are incurred and 130,200 hours are used. Compute the manufacturing overhead rate for the year. (Round answers to 2 decimal places, e.g. 1.25.) Manufacturing overhead rate $ 2.20 per machine hour Answer: Manufacturing Overhead Rate = Estimated Overhead ÷ Estimated…

    • 469 Words
    • 5 Pages
    Satisfactory Essays