Перевод текста laser and plasma welding
laser welding — lazerinis suvirinimas statusas T sritis automatika atitikmenys: angl. laser welding vok. Laserstrahlschweißen, n rus. лазерная сварка, f pranc. soudage par laser, m … Automatikos terminų žodynas
laser welding machine — lazerinis suvirintuvas statusas T sritis radioelektronika atitikmenys: angl. laser welding machine vok. Laserschweißgerät, n rus. лазерный сварочный агрегат, m pranc. agrégat laser de soudage, m … Radioelektronikos terminų žodynas
Laser beam welding — (LBW) is a welding technique used to join multiple pieces of metal through the use of a laser. The beam provides a concentrated heat source, allowing for narrow, deep welds and high welding rates. The process is frequently used in high volume… … Wikipedia
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welding — Technique for joining metallic parts, usually through the application of heat. Discovered in the 1st millennium AD during attempts to manipulate iron into useful shapes, the technique produced a strong, tough blade. Welding traditionally involved … Universalium
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Laser applications — There are many scientific, military, medical and commercial laser applications which have been developed since the invention of the laser in the 1958. The coherency, high monochromaticity, and ability to reach extremely high powers are all… … Wikipedia
Welding — is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. This is often done by melting the workpieces and adding a filler material to form a pool of molten material (the weld puddle ) that cools to… … Wikipedia
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laser — /lay zeuhr/, n. Physics. a device that produces a nearly parallel, nearly monochromatic, and coherent beam of light by exciting atoms to a higher energy level and causing them to radiate their energy in phase. Also called optical maser. [1955 60; … Universalium
Laser and Plasma Welding
1. Welding is process which provides non-detachable joining of two like metal pieces by heating them till melting condition or fusion without or with mechanical pressure.
2. Laser welding is quickly becoming a practical welding process. In its present stage of development, the laser can form welds up to about 1/32 inch deep.
3. Pulsed lasers are often used in industry today. The laser’s heat input is very small, so the heat-affected zone around a joint is correspondingly small.
The laser’s high power intensity permits welds between dissimilar metals of widely varying physical properties.
4. Plasma arc welding is efficient for fusion welding stainless steels, titanium, nickel from 0.001 to 0.030 inch thick. The process is particularly well suited for repairing delicate parts, for joining thin structures, and for welding electronic components. With the exception of aluminum any metal or combination of metals can be welded with plasma arc process.
1. Прочитайте текст и выполните следующие за ним упражнения.
2.Переведите на русский язык следующие слова, классифицируйте их по способу образования:
Рrocess, metal, mechanical, type, laser, practical, form, industry, physical, plasma, steel, titanium, nickel, aluminum, structure, electronic, intensity.
3.Найдите в правой колонке русские эквиваленты английских словосочетаний:
1) non-detachable joining a. дуговая сварка
2) to replace b. соответственно
3) arc welding c. в частности
4) laser welding d.стык, соединение
5) application e.за исключением
6) to weld f.неразъёмное соединение
7) pulsed laser g.неодинаковые (разные)
9) correspondingly i.плазменная сварка
10) to permit j. заменять
11) dissimilar k. пульсирующий лазер
12) plasma arc welding l. применение
13) particularly m. позволять
14) with the exception n.лазерная сварка.
4.Найдите соответствующие ответы на вопросы и напишите их в той последовательности, в которой заданны вопросы:
Вопросы
1. What king of joining does welding provide?
2. What type of welding can replace arc welding?
3. What is the advantage of laser welding?
4. What metals is plasma arc welding efficient for?
5. Where is the process of plasma arc welding used?
Ответы
b. A non-detachable joining.
c. For fusion welding stainless steel, titanium and nickel.
d.The laser’s high power intensity permits welds between dissimilar metals of widely varying physical properties.
e. In repairing delicate parts, for joining thin structures and for welding electronic components.
5. Переведите на русский язык:
1) I like his method of teaching. 2) It’s no use talking to him. 3) He left without saying a word. 4) He was suspected of keeping something from us. 5) I hate being reminded of things. 6) I don’t remember having seen her here. 7) We insist on John’s making a report. 8) Do you mind our being present? 9) I’ve never heard of him behaving like that. 10) Do you mind my cousin joining us?
6. Переведите на русский язык, обращая внимание на действие герундия:
1) I remember leaving a message for him. I remember his leaving a message for me. 2) Mr. Blank apologized for having caused a trouble. Mr. Blank apologized for his children having caused a trouble. 3) We don’t mind cooperating with you. We don’t mind you cooperating with us.
7. Напишите вопросы согласно модели:
Model:It’s uselessto arguewith him.What’s the use ofarguingwith him?
1) It’s no use accusing him. _____________________________________
2) It’s useless to object to it._____________________________________
3) It’s no use talking, let’s get down to work._______________________
8. Выберите:
1) Process of recreating data …
a. Процесс, воссоздающий данные;
б. Процесс восстановления данных.
2) We were against the program being changed.
а. Мы были против изменения программы.
б. Мы были против того, чтобы нам изменять программу.
3) Without recovering individual files …
а. Без восстановленных индивидуальных файлов;
б. Без восстановления индивидуальных файлов.
4) They objected the new modification being created.
а. Они возражали против того, чтобы мы сделали новую модификацию.
б. Они возражали против создания новой модификации.
Text 6: «Welding»Welding is a proce
Welding is a process when metal parts are joined together by the application of heat, pressure, or a combination of both. The processes of welding can be divided into two main groups:
• pressure welding, when the weld is achieved by pressure and
• heat welding, when the weld is achieved by heat. Heat welding is the most common welding process used today.
Nowadays welding is used instead of bolting and riveting in the construction of many types of structures, including bridges, buildings, and ships. It is also a basic process in the manufacture of machinery and in the motor and aircraft industries. It is necessary almost in all productions where metals are used.
The welding process depends greatly on the properties of the metals, the purpose of their application and the available equipment. Welding processes are classified according to the sources of heat and pressure used.
The welding processes widely employed today include gas welding, arc welding, and resistance welding. Other joining processes are laser welding, and electron-beam welding.
Gas Welding
Gas welding is a non-pressure process using heat from a gas flame. The flame is applied directly to the metal edges to be joined and simultaneously to a filler metal in the form of wire or rod, called the welding rod, which is melted to the joint. Gas welding has the advantage of using equipment that is portable and does not require an electric power source. The surfaces to be welded and the welding rod are coated with flux, a fusible material that shields the material from air, which would result in a defective weld.
Arc Welding
Arc-welding is the most important welding process for joining steels. It requires a continuous supply of either direct or alternating electrical current. This current is used to create an electric arc, which generates enough heat to melt metal and create a weld.
Arc welding has several advantages over other welding methods. Arc welding is faster because the concen¬tration of heat is high. Also, fluxes are not necessary in certain methods of arc welding. The most widely used arc-welding processes are shielded metal arc, gas-tungsten arc, gas-metal arc, and submerged arc.
Shielded Metal Arc
In shielded metal-arc welding, a metallic electrode, which conducts electricity, is coated with flux and connected to a source of electric current. The metal to be welded is connected to the other end of the same source of current. An electric arc is formed by touching the tip of the electrode to the metal and then drawing it away. The intense heat of the arc melts both parts to be welded and the point of the metal electrode, which supplies filler metal for the weld. This process is used mainly for weld¬ing steels.