5. , :
1. What operations is the engine lathe used for?
2. What are the principal units of the lathe?
3. What units are located on the bed?
4. What is the function of the tailstock?
5. Where are the handles and levers mounted?
a. To support one end of the work turned between centres.
b. On the front of the apron.
c. For turning, drilling, screwcutting and others.
d,.The headstock, the saddle and the tailstock.
e. The bed, the headstock, the tailstock and the carriage with the apron.
6. , :
1. The unit that contains the spindle and the gearbox is 2. The unit that supports one end of the work turned between centres is called....
3. The unit which carries the tool is called....
a) the carriage;
b) the headstod
c) the tailstock
4. The unit on saddle and the is called
a) the carriage
b) the bed;
c) the headstod
5. The units, actions of the tool are controlled, are called.... a) guideways;
b) the saddle and the apron; c) levers and handles.
5
1. :
1. non-ferrous metal a.
2. turning mill b.
3. roughing operations c.
4. finishing operations d.
5. turret head e.
6. side head f.
7. facing g.
8. drilling h.
9. high rigidity i.
10. gearbox j.
11. multidisk friction clutch k.
12. work feed l.
13. table speed m. ( )
14. cross-rail n. ()
15. V-belt o.
2. :
universal, vertical, operation, metal, steel, horizontal, cylinder, machine, electric, motor,
3. :
VERTICAL TURNING MILLS
1. The single-column vertical turning mills are universal high-speed machines. They are designed for roughing and finishing operations on parts made of steel, non-ferrous metals.
2. The machines are provided with two heads: vertical turret head and horizontal head. Vertical turret head travels along the horizontal ways of the cross-rail. Horizontal side head moves along the vertical ways of the column.
3. The machine performs the following operations: cylindrical turning, facing, cutting, drilling, etc.
4. High rigidity of machinges and their units as well as the wide range of table speeds and work feeds allow machining at most favourable cutting speeds and work feeds.
5. Motion to the table is transmitted from the main drive electric nWor by means of V-belts and gearbox.
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6. For starting and stopping the table rotation the gearbox is provided with multidisk friction clutch.
1,2 3.
5. , :
1. What are the single-column vertical turning mills designed for?
2. What mechanisms are the machines provided with?
3. What operations does the machine perform?
4. By what means is motion to the table transmitted?
5. What mechanism is the gearbox provided with?
a. By means of V-belts and gearbox.
b. For roughing and finishing operations.
c. With multidisk friction clutch.
d. Cylindrical turning, facing, cutting and drilling.
e. With vertical turret head and horizontal side head.
6. , :
1. Vertical turret head travels along.... a) the horizontal ways of the cross-rail;
2. Horizontal side head travels along.... b) the vertical ways of the column.
3. Motion to the table is transmitted by.... a) cross-rail;
b) V-belts and gearbox.
4. This machine is called.... a) vertical turret head;
b) vertical turning mill.
6
1. :
1. grinder a.
2. lever b.
3. wheel slide c.
4. cross-feed d. ( -. )
5. Wheel spindle e.
6. bracket f.
7. wheel head g.
8. to clamp h.
9. to set-up i.
10. to adjust j.
11. longitudinal direction k.
12. workpiece l.
2. :
universal, cylinder, type, mass, massive, construction, hydraulic, control, function, spindle, motor.
3. :
THE HYDRAULIC GRINDER
1. This universal grinder is designed for grinding cylindrical holes and faces of workpieces. It is widely used for lot production in various types of machinebuilding plants.
2. Machines of this type are of very massive construction, but they are designed in such a way that they can be operated as easily as machines of smaller sizes.
3. They are hydraulically operated and controlled by a single lever located at the front end of the machine. This single lever controls all functions of the machine including all movements of the wheel slide, cross-feed, starting and stopping the work of the spindle.
4. The wheel spindle is driven by a V-belt from a motor located on a bracket on the wheel slide. The cross-feed for the wheel slide is operated by a hydraulic unit.
5. The wheel head is clamped on the top surface of the table. W)(en setting up the grinder, the wheel head can be adjusted in a longitudinal direction to suit the length of the workpiece.
