Студопедия
Случайная страница | ТОМ-1 | ТОМ-2 | ТОМ-3
АвтомобилиАстрономияБиологияГеографияДом и садДругие языкиДругоеИнформатика
ИсторияКультураЛитератураЛогикаМатематикаМедицинаМеталлургияМеханика
ОбразованиеОхрана трудаПедагогикаПолитикаПравоПсихологияРелигияРиторика
СоциологияСпортСтроительствоТехнологияТуризмФизикаФилософияФинансы
ХимияЧерчениеЭкологияЭкономикаЭлектроника

Read the text consulting the dictionary, be ready to discuss different types of milling machines

Читайте также:
  1. Brief Discussion on History of English Literature
  2. Choice of machines
  3. Discussing a Contract.
  4. DISCUSSING CONSTRUCTION PERIOD
  5. DISCUSSING ENGAGEMENT OF A CONSULTING COMPANY
  6. DISCUSSING ENGAGEMENT OF A NEW SUB-CONTRACTOR
  7. Discussing Foundation Documents

Example of a CNC vertical milling center

A milling machine is a machine tool used for the shaping of metal and other solid materials. Milling machines exist in two basic forms: horizontal and vertical, which terms refer to the orientation of the cutting tool spindle. Unlike a drill press, in which the workpiece is held stationary and the drill is moved vertically to penetrate the material, milling also involves movement of the workpiece against the rotating cutter, the latter which is able to cut on its flanks as well as its tip. Workpiece and cutter movement are precisely controlled to less than 0.001 inches (.025 millimeters), usually by means of precision ground slides and leadscrews or analogous technology. Milling machines may be manually operated, mechanically automated, or digitally automated via computer numerical control (CNC).

Milling machines can perform a vast number of operations, some very complex, such as slot and keyway cutting, planing, drilling, diesinking, rebating, routing, etc. Cutting fluid is often pumped to the cutting site to cool and lubricate the cut, and to sluice away the resulting swarf.

 

Text: Milling Machines

Part II

Read the text, write out the sentences with non-final forms, define them, translate the sentences.

In a milling machine the cutter (фреза) is a circular device with a series of cutting edges on its circumference. The workpiece is held on a table that controls the feed against the cutter. The table has three possible movements: longitudinal, horizontal, and vertical; in some cases it can also rotate. Milling machines are the most versatile of all machine tools. Flat or contoured surfaces may be machined with excellent finish and accuracy. Angles, slots, gear teeth and cuts can be made by using various shapes of cutters.


Дата добавления: 2015-07-07; просмотров: 242 | Нарушение авторских прав


 

 

Читайте в этой же книге: Section V. Fabrication of Metals | Fabrication of metals | Introduction. Machine Tools | Read and translate | Drill Presses | Geared head drill press | Mill drill | Speaking | Brief Introduction | Screw Machines |
<== предыдущая страница | следующая страница ==>
Choice of machines| Numerical control

mybiblioteka.su - 2015-2023 год. (0.029 сек.)