найбільша колекція україномовних рефератів

Всього в базі: 75883
останнє поновлення: 2016-12-30
за 7 днів додано 0

Реферати на українській
Реферати на російській
Українські підручники

$ Робота на замовлення
Реклама на сайті
Зворотній зв'язок



реферати, курсові, дипломні:

Українські рефератиРусские рефератыКниги
НазваMachine-tools-a measure of man\'s progress (реферат)
РозділІноземна мова, реферати англійською, німецькою
ФорматWord Doc
Тип документуРеферат
Замовити оригінальну роботу





The variety and combinations of machine tools today are unlimited. Some

of them are very small and can be mounted on a work bench but others are

so large that we have to construct special buildings to house them.


There are some basic operations at any workshop. They are turning,

drilling, threading, etc. The main machine-tool a workshop is the

multipurpose lathe. What is a lathe? It is a power-driven machine with

special tools which can cut or form metal parts. The metal that cuts

another metal must be very hard and so tools should be made of very hard

steel alloys. The tool itself is very small in comparison with the

mechanism that is to direct it.


Technological progress improves accuracy of machine tools. Today's

equipment can produce parts with very high accuracy. One can find a

number of machine tools that can measure and inspect their production

themselves – machine tools that are to handle the parts mechanically and

automatically. Such machines can hold the parts which are to be measured

and be able to indicate precise measurements themselves. A great many of

such "clever" machines can be found today in our industry.


Since machine tools become faster and more complex, automatic

measurements and inspection ought to be of greater importance.

Automation is one of the main factors of engineering progress.


Flexible production lines form the basis for automated workshops. The

main principle of such a flexible line is the fact that it can be

switched over from one product to another, which has a similar structure

but a different outline, almost instantaneously. It is equally efficient

in conditions of will serve to increase the productivity.


The USSR and other highly industrialized countries begin making use of

flexible modules and automated workshops on a broad basis.