МІНІСТЕРСТВО ОСВІТИ І НАУКИ УКРАЇНИ

КИЇВСЬКИЙ НАЦІОНАЛЬНИЙ УНІВЕРСИТЕТ

ТЕХНОЛОГІЙ ТА ДИЗАЙНУ

Англійська мова

Методичні вказівки до практичних занять

для студентів ІV курсу спеціальності

„Інженерна механіка”

ІІ частина

Київ кнутд 2009

Англійська мова: Методичні вказівки до практичних занять для студентів ІV курсу спеціальності „Інженерна механіка” ІІ частина / Упор. В.А. Гусаренко – К.: КНУТД, 2008 – 38 с. – Англійською мовою

Упорядники: Гусаренко В.А.

Відповідальний за випуск: Т.В. Барамикова, к.ф.н., доцент, зав. кафедрою іноземних мов ф-ту ТЛП

Протокол № 10 від 04.05.09 р.

Unit 9 Topic: Types of Lathes. Milling Machine

I. Reading skills.

1. Pre – reading tasks.

a) You will read a text about milling machine.

b) What do you know about belt sander operation?

1. slot – щілина

2. surface – поверхня

3. swivel – крутитися

4. work piece – оброблювальний виріб

5. fatigue – утома (матеріалу)

6. sander – стрічково-шліфувальний верстат

7. bur – задирка, брусок

8. pulley – шків, блок

Milling machine

A milling machine is a machine tool used for the shaping of metal and other solid materials. Its basic form is that of a rotating cutter which rotates about the spindle axis (similar to a drill), and a table to which the workpiece is affixed. In contrast to drilling, where the drill is moved exclusively along its axis, the milling operation involves movement of the rotating cutter sideways as well as 'in and out'. The cutter and workpiece move relative to each other, generating a toolpath along which material is removed.

Milling machines are very versatile. They are usually used to machine flat surfaces, but can also produce irregular surfaces. They can also be used to drill, bore, cut gears, and produce slots. The type of milling machine most commonly found in student shops is a vertical spindle machine with a swiveling head. Although there are several other types of milling machines, this document will focus only on the vertical milling machine.

A milling machine removes metal by rotating a multi-toothed cutter that is fed into the moving workpiece. The spindle can be fed up and down with a quill feed lever on the head.

A belt sander is useful for removing burrs and rough edges from parts. It is composed of a belt coated with abrasive riding about two pulleys. The lower pulley is driven by a motor. The upper pulley follows and allows tension in the belt to be adjusted.

Beltsanders are effective on wood, most metals (aluminum, steel, brass, etc), and some plastics. The small particles generated by the belt sander can be toxic. It’s good to use a sander with a vent attached to it and to wear a mask when using the belt sander. Don't use the belt sander on printed circuit boards or fiberglass; they create toxic particles.

Operating a Belt Sander

When smoothing edges and rounding corners, the part should be supported on the table of the machine. The part should be moved back and forth to achieve a better finish and to avoid hot spots on the belt.

To round off the edges of a part, one must hold the part on an angle with respect to the belt. Be sure that the belt is pointing down into the belt.

Using a Small Belt Sander

Some jobs cannot be done on the large belt sander shown above. For instance it is impossible to smooth out the faces of an inside corner. For this task, a smaller machine with a thin belt is appropriate.

As the small belt sander was previously configured, it is difficult to smooth out convex features without creating facets on the part. This problem can be alleviated by reconfiguring the machine. The table and platen can be removed to allow the belt to conform to the shape of your part.

3. Find the answers to the questions in the text.

1. What is a milling machine?

2. When can milling machines be used to?

3. What is a belt sander useful for?

4. What do you know about using a small belt Sander?

5. The belt sander is not used on printed circuit boards or fibreglass, isn’t it?

4. Complete the sentences

1. A milling machine is a machine tool ... .

2. The cutter and workpiece move ... .

3. ... are very versatile.

4. A belt sander is useful for ... .

5. Some jobs cannot be done on ... .

5. Match the following English words and word – combinations with their Ukrainian equivalents.

1. tool a) тверде тіло

2. drilling b) фрезерування

3. surface c) поверхня

4. solid d) виробляти

5. produce e) ріжучий інструмент

6. shaping f) свердлування

7. milling g) розточка

8. boring h) різати

9. cut i) включати до складу

10. include j) надання форми

6. True or false statements

1. A milling machine is a machine tool used for the shaping of metal.

2. The milling operation involves small particles generated by the belt sander.

3. Milling machine usually used to machine flat surface.

4. Milling – crushing grain, shaping metal in a machine or pressing or rolling metal.

5. A belt sander is useful for removing burrs and rough edges from parts.

II. Retell the text “Milling Machine”

III. Rendering

1. Read the text and translate it into Ukrainian using new words in their specialized meanings below

1. clamp – затискач, затискувати

2. swivel out – повертати на шарнірах

3. crank – кривошип

4. spindle – вісь, вал, шпиндель

5. dial – кругова шкала

6. chuck – оправка, тримач

7. bit – бур, свердел

8. deburring (tool) – інструмент для знаття задирок на металі