Гурова Г.Г., Николаева Н.С. - Обучение разговорной речи и чтению литературы на английском языке по специальности Сварка, страница 2

Some processes are most frequently performed on lap joints.Choose the odd one out:a) resistance spot welding;b) electron beam welding;c) the electrogas welding;d) laser beam welding.1.7. Find in the text the English equivalents for the followingphrases.Другие варианты также существуют; вместо прямолинейныхкромок; в зависимости от используемого процесса; как гласит название; применяются в обоих видах металлических конструкций;в 3 раза превышая толщину самого тонкого элемента; один из элементов делается с отбортовкой; под прямым углом друг к другу;которые не подвержены большим нагрузкам; дается возможностьохладиться; это позволяет производить сварку; больших сечений;и других столь же важных факторов; количество деталей, которыенеобходимо сварить.1.8.

Fill in the gaps with the necessary prepositions.1. The weld joint is where two or more metal parts arejoined ... weldinga) in2. An edge joint should only be used ... joining metals1/4 inch or less in thicknessb) of93. Lap joints are commonly used ... torch brazing andspot welding applicationsc) on4. A joint of this type may be ... square or groovedd) by5. Welds can be geometrically prepared ... many differentwayse) over6.

A lap joint is made by lapping one piece of metal ...anotherf) for7. Corner joints are used to join two members located ...right angles to each otherg) either8. Instead ... having straight edges single-U and double-Upreparation joints are curved, forming the shape of a Uh) to9. Many pieces can be welded together in a lap jointgeometry depending ... the process used and the thicknessof the materiali) with10.

Double-V preparation joints are characterized by thetwo pieces of material each tapering ... a single centrepointj) at1.9. Translate the following word combinations into Russian.Two or more metal parts; the five basic types of weld; double-Vpreparation joints; the two pieces of material each tapering to a singlecentre point; two members located at right angles to each other; theedges of two or more members lying in the same plane; one piece ofmetal; sheet metal work; metals 1/4 inch or less in thickness; thick sections arranged in a single-V preparation joint; the type of joint selectedfor any welding job; the pieces being welded; fit-up obtainable; available edge preparation equipment; available edge preparation equipment;a number of pieces to be welded.1.10.

Make up a summary in English to the text “Weld Joints”.1.11. Scan the text “Weld joints” and fill in the table using the information from the text.Types of welds10CharacteristicsApplications1.12. Read the text paying attention to the active terminological vocabulary.Parts of JointsWhile there are many variations of joints, the parts of the joint aredescribed by standard terms.

The root of a joint is that portion of thejoint where the metals are closest to each other. The root may be a point,a line, or an area, when viewed in a cross section. A groove is an openingor space provided between the edges of the metal parts to be welded.The groove face is that surface of a metal part included in the groove.A given joint may have a root face or a root edge. The root face is theportion of the prepared edge of a part to be joined by a groove weld thathas not been grooved. As you can see, the root face has relatively smalldimensions.

The root edge is basically a root face of zero width. Thegroove face and the root face are the same metal surfaces in some joints.The specified requirements for a particular joint are expressed in suchterms as bevel angle, groove angle, groove radius, and root opening.The bevel angle is the angle formed between the prepared edge of amember and a plane perpendicular to the surface of the member. Thegroove angle is the total angle of the groove between the parts to bejoined. For example, if the edge of each of two plates were bevelled toan angle of 30 degrees, the groove angle would be 60 degrees.

This isoften referred to as the “included angle” between the parts to be joinedby a groove weld.The groove radius is the radius used to form the shape of a J- orU-groove weld joint. It is used only for special groove joint designs. Theroot opening refers to the separation between the parts to be joined atthe root of the joint. It is sometimes called the “root gap.” To determinethe bevel angle, groove angle, and root opening for a joint, you mustconsider the thickness of the weld material, the type of joint to be made,and the welding process to be used. As a general rule, gas weldingrequires a larger groove angle than manual metal-arc welding.

The rootopening is usually governed by the diameter of the filler material. This,in turn, depends on the thickness of the base metal and the weldingposition.11Root penetration and joint penetration of weldsWeld reinforcementSimple weld beadHaving an adequate root opening is essential for root penetration.Root penetration refers to the depth that a weld extends into the root ofthe joint. Root penetration is measured on the centre line of the root crosssection. Joint penetration refers to the minimum depth that a groove (ora flange) weld extends from its face into a joint, exclusive of weld reinforcement. As you can see in the figure, the terms, root penetration andjoint penetration, often refer to the same dimension. Weld reinforcementis a term used to describe weld metal in excess of the metal necessaryto fill a joint.(2830)From http://64.78.42.182/sweethaven/BldgConst/Welding/lessonmain.asp?lesNum=3&modNum=21.13.

Try to memorize the following words and word combinations:1) a groove, n — подготовка (разделка) кромок под сварку;2) a root, n — корень шва, вершина разделки кромок, пространство между свариваемыми кромками в месте их наибольшего сближения;3) a groove face — свариваемая кромка, поверхность разделки;124) a groove weld — шов с разделкой кромок;5) relatively [ rel@tıvlı], adv — относительно, сравнительно;6) a bevel [ bev(@)l] angle — угол скоса кромки;7) a groove angle — угол разделки кромок;8) an included angle — угол разделки (раскрытия) кромок;9) a groove radius — радиус закругления кромки;10) a root opening — зазор между свариваемыми кромками;11) to govern [ gv(@)n], v — управлять, обусловливать;12) root penetration — проплавление (провар) корня шва;13) joint penetration — проплавление (провар) соединения;14) to extend, v — расширяться, удлиняться;15) weld reinforcement [ ri:ın fO:sm@nt] — усиление шва;16) in excess of — больше, свыше, сверх нормы.Word Study1.14.

Read the words correctly. Consult the dictionary if necessary.Diameter, variations, area, zero, width, view, groove, requirement,particular, perpendicular, angle, radius, design, measure.1.15. Translate the following sentences into Russian paying attentionto the words underlined.1. A groove is an opening or space provided between the edges ofthe metal parts to be welded. 2. The root face, also shown in view A,is the portion of the prepared edge of a part to be joined by a grooveweld. 3. The groove radius is the radius used to form the shape of aJ- or U-groove weld joint.

4. The root opening refers to the separationbetween the parts to be joined at the root of the joint. 5. Weld reinforcement is a term used to describe weld metal in excess of the metalnecessary to fill a joint. 6. To determine the bevel angle, groove angleand root opening for a joint, you must consider the thickness of theweld material, the type of joint to be made, and the welding process tobe used. 7.

To determine the bevel angle, groove angle and root openingfor a joint is necessary to get a high quality weld.131.16. Fill in the gaps with the necessary prepositions.1. Root penetration refers ... the depth that a weldextends into the root of the jointa) at ... of2. The root opening refers to the separationbetween the parts to be joined ... the root ...the jointb) on3. The root may be a point, a line, or an area, whenviewed ...

cross sectionc) from ... into4. The groove radius is the radius used to form theshape ... a J- or U-groove weld jointd) by ... of5. While there are many variations of joints, theparts of the joint are described ... standard termse) to6. The specified requirements for a particular jointare expressed ... such terms bevel angle, grooveangle, groove radius, and root openingf) in7. This depends ... the thickness of the base metaland the welding positiong) of8. The root opening is usually governed ... thediameter ...

the filler materialh) in ... of9. Root penetration is measured ... the centre line ...the root cross sectioni) by10. Joint penetration refers to the minimum depththat a groove weld extends ... its face ... a joint,exclusive of weld reinforcementj) in ... as11. Weld reinforcement is a term used to describeweld metal ... excess ... the metal necessary to fill ajointk) on ... of1.17. Read the text again and choose the correct variant to the following.1.

What is the portion of the joint where the metals are closest toeach other?a) groove;b) a root;14c) a root opening;d) an included angle.2. What configuration doesn’t the root have in the cross section?a) line;b) point;c) curve;d) area.3. The root edgea) is basically a root face of zero width;b) is basically a groove face of zero width;c) is basically a root face of two in.