
- •Передмова
- •Contents
- •Unit 1. Materials handling
- •Material Holding, Feeding and Metering
- •Hand chain hoists are portable lifting devices suspended from a hook and operated by _______ on a hand chain.
- •Unit 2. Gear and gearing (Part 1)
- •Gear and Gearing (part 1)
- •Unit 3. Geared systems and mechanisms (Part 2)
- •Gears and Gearing
- •Important, stock, reduced, figures, to be left,
- •Getting into shape: some basics
- •Unit 4. Metal-removal processes and machine tools
- •Material Removal Processes
- •Manufacturing techniques evaluation: cutting operations
- •Unit 5. Motion control systems overview
- •Motion Control System
- •Installation, shaft, servomotor, smooth, force, unit accumulate
- •Unit 6. Tool wear and sharpening
- •Tool wear
- •Unit 7. Bearings
- •Bearings. Components and specifications
- •Fig.1 Radial contact bearing terminology.
- •Principal standard bearing types
- •Unit 8. Mechanical elements (Part 1)
- •Machine Elements: Keys and Pins
- •Unit 9. Mechanical elements (Part 2)
- •Mechanical Elements: Rivets, Belts and Pulleys.
- •Write a list of all fasteners that you know. Compare it with the one of your groupmate.
- •Give the definition to the following terms and make sentences of your own with each of them:
- •Imagine that you are a young crazy inventor and someone presented you a large sum of money. In what field of science would you invest them or what would you do?
- •Unit 10. Mechanical failure modes
- •Mechanical Failure Modes
- •References:
- •How to make a presentation
- •Key phrases for preparing presentation
- •Why is writing an essay
- •Technical translation
- •Methods and Practices
- •Reading techniques
- •Skimming
- •Scanning
- •Using Context
- •Writing techniques
- •The Introduction
- •The body Paragraphs
- •The Conclusion
- •Irregular verbs
The material holding system is the first stage of a material _____ ______
a) handling theory
b) handling operation
c) handling system
The feeding and metering ______ selected depend on the above factors and the properties of the material.
a) apparatus
b) devices
c) equipment
Material handling may be divided into classifications or actions related to the ______ of the process.
a) stage
b) way
c) type
The proper material handling equipment can be selected by analyzing the ____.
a) equipment
b) material
c) devices
Since material handling adds expense, but not _______, it should be reduced as much as possible with respect to time, distance, frequency, and overall cost.
a) attractiveness
b) durability
c) value
The material can be _________ or lost in transit.
a) waste
b) damaged
c) coloured
Lifting magnets are materials-handling devices used for ______ pig iron, scalp iron, casting, billets, and other magnetic material.
a) dividing
b) handling
c) drying
To obtain optimum magnet performance, a suitable ____ ____ should be used.
a) magnetic controller
b) magnetic constant
c) magnetic cable
The controller should have protective features to absorb the stored energy of the magnet during its ___________ .
a) unload
b) discharge
c) detonate
Hand chain hoists are portable lifting devices suspended from a hook and operated by _______ on a hand chain.
a) pulling |
b) pushing |
c) gathering |
Task 9. Use the words in the box to complete the text. Use each word only once.
diameters rope impact durable welded strength chain conveyor |
Welded load wheel chain also has 3 times as much 1)________ absorption capability as a wire 2)_______ of equal static tensile strength. As a result, wire rope of equal impact 3)_________ costs much more than load wheel chain. Since average wire rope life in a hoist is only about 5 percent of the life of 4)________, overall economics are greatly in favor of chain for hoisting purposes. Another widespread use of 5)________ link chain is in conveyor applications where high loads and moderate speeds are encountered. As contrasted to link-wheel chain used in hoists, 6)_______ chain requires a longer pitch. The longer-pitch chain, in addition to being more economical, accommodates the use of shackle connectors between sections of the chain to which flight bars are attached.
Wire rope used for suspending loads is usually required to be as flexible as possible to minimize the 7)_________ of the drums or sheaves involved. Thus, a rope having six strands of 19 wires each on a hemp core is used. Extra pliable ropes made with strands of 37 wires each or eight strands of 19 wires each on a hemp core are also available but are much less 8)__________ because of the finer individual wires used. Hoisting ropes are constructed with the relative twist of the wires in the strands the reverse of the twist of the strands about the core.
Task 10. Make sentences about the materials with ‘can …, but …, can’t’, or ‘can … and … can’. The first one is done for you.
(bend/metal/wood) You can bend metal, but you can’t bend wood.
(heat/air/water)
(melt/plastic/wood)
(scratch/glass/metal)
(stretch/nylon/glass)
(break/glass/wood)
(cut/wood/metal)
Task 11. A lecturer is showing a DVD of a test. Complete the description. The first one is done for you.
H
ello.
Now we can watch the DVD of a car crash. Here they (1) are
testing
(test)
the material for the seatbelt. The human dummy (2) _______ (sit) in
the test car. This dummy weighs 90 kilos. Here the technician (3)
______ (tighten) the nylon seatbelt around the dummy. Now the
technician (4) ______ (start) the engine of the radio-controlled car.
Look at the crash in slo-mo (slow motion). The car (5) ______ (run) into the concrete block at 40 kph. The body of the dummy (6) ______ (stretch) the nylon seatbelt. And see, the dummy (7) ________ (touch) the airbag. Look carefully. Is the dummy’s face (8) _______ (strike) the front window? No, it isn’t. there is no contact with the front window.
Task 12. Underline the two correct adjectives for each material. The first one is done for you.
A ceramic cup is flexible/heat-resistant and hard/soft.
A concrete floor is rigid/flexible and brittle/tough.
A rubber tire is rigid/flexible and weak/strong.
A fiberglass window frame is heat-resistant/soft and rigid/flexible.
A nylon rope is rigid/flexible and strong/weak.
The graphite in the middle of a pencil is light/heavy and hard/soft.
A polycarbonate road sign is rigid/flexible and strong/weak.
A polystyrene coffee cup is brittle/tough and heavy/light.
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Task 14. Write a short report (80-100 words) about natural materials. How do engineered materials differ from natural materials? Use the following pictures.
Task 15. Watch the video file “What Is Material Handling. Try to explain what is material handling? This video, produced by the Material Handling Industry of America and the Material Handling Equipment Distributors Association, which Fred Hill is a proud member of, does a great job of explaining exactly what material handling is and how it touches every industry and plays a pivotal role in day-to-day life.