RU2524285C2 - Preparation of parts edges for arc welding of butt joint - Google Patents

Preparation of parts edges for arc welding of butt joint Download PDF

Info

Publication number
RU2524285C2
RU2524285C2 RU2012138239/02A RU2012138239A RU2524285C2 RU 2524285 C2 RU2524285 C2 RU 2524285C2 RU 2012138239/02 A RU2012138239/02 A RU 2012138239/02A RU 2012138239 A RU2012138239 A RU 2012138239A RU 2524285 C2 RU2524285 C2 RU 2524285C2
Authority
RU
Russia
Prior art keywords
edges
bevel
welding
welded
butt joint
Prior art date
Application number
RU2012138239/02A
Other languages
Russian (ru)
Other versions
RU2012138239A (en
Inventor
Владимир Петрович Сидоров
Сергей Александрович Хурин
Original Assignee
Автономная некоммерческая организация "Головной аттестационный центр по сварочному производству Средневолжского региона"
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Автономная некоммерческая организация "Головной аттестационный центр по сварочному производству Средневолжского региона" filed Critical Автономная некоммерческая организация "Головной аттестационный центр по сварочному производству Средневолжского региона"
Priority to RU2012138239/02A priority Critical patent/RU2524285C2/en
Publication of RU2012138239A publication Critical patent/RU2012138239A/en
Application granted granted Critical
Publication of RU2524285C2 publication Critical patent/RU2524285C2/en

Links

Images

Abstract

FIELD: process engineering.
SUBSTANCE: invention relates to welding, particularly, to preparation of part edges for at welding of butt joint. Dual-sided skews and edge blunting are made for making of double-welded butt joint. Said skews are asymmetric over the part depth with smaller skew-to-larger skew ratio of 0.2-0.6 at total height of skews not exceeding of 50% of welded parts depth. Smaller skew is arranged on welding side at overhead position.
EFFECT: lower input of welding materials, faster preparation of weld edges.
8 dwg

Description

The invention relates to the field of welding and can be used in all industries where one-piece butt joints are used.
Known welded butt joints with two-sided symmetrical bevel of two edges, used to obtain two-sided seams during arc welding in protective gases. The bevel of the edges can be rectilinear, curvilinear, step and broken (see connections C25, C26, C27 according to GOST 14771-76).
These joints have a small blunting, not exceeding 3 mm, little dependent on the thickness of the welded elements. When welding, on each side they strive to ensure complete penetration by the amount of blunting of the edges.
A butt weld with a double-sided symmetrical bevel of two edges is also known, used to produce two-sided seams, in which the bevel of the edges on each side is equal to about 1/3 of the thickness of the parts to be welded. During welding, a dull penetration is provided with overlapping of the welds (see the textbook edited by Akulov A.I., Belchuk G.A., Demyantsevich V.P. Technology and equipment for fusion welding), M .: Mechanical Engineering, 1977. p.195 , Fig. 100, this compound is selected as a prototype).
Such compounds are ineffective, since a significant part of the metal during beveling is removed by various processing methods, and then filled with additional metal during welding. The cost of processing the edges and filling the grooves during welding of such joints increases significantly with increasing thickness of the elements being welded when using simultaneous two-arc welding conducted by arcs on opposite planes of the butt welded joint located in a horizontal plane.
The technical effect of the claimed invention consists in saving materials used to fill the edges during welding and time for preparing the welding edges.
This is achieved by the fact that the welded butt joint is prepared with two-sided beveling of two edges and blunting to perform two-sided seam by arc welding. In contrast to the prototype, the bevel is performed asymmetrical in thickness of parts with a ratio of bevel heights of 0.2 ... 0.6 with a total bevel height not exceeding 50% of the thickness of the elements being welded. In this case, the bevel with a lower height is located in the ceiling position.
The invention is illustrated by drawings, where in Fig. 1, as an example, structural elements (a) of prepared edges and arrangement of seams (b) of the proposed connection with a straight bevel of edges are shown, in Fig. 2-Fig. 8 are some variants of structural elements (a) of edges and the location of the seams (b) on both sides of the connection.
Figure 1 has the following notation: S is the thickness of the parts to be welded; b - blunting of the welded edges; α 1 - angle of cutting edges with greater height; α 2 - angle of cutting edges with greater height; s is the clearance; e 1 and e 2 - the width of the seams; h 1 - the height of the seam from the side of the cutting edges with a greater height of the bevel; h 2 - the height of the seam from the side of the cutting edges with a lower bevel height; g 1 and g 2 - the bulge of the seams. The number 1 shows the outline of the weld from the groove side with a greater height of the bevel, and the number 2 shows the outline of the weld from the side of the groove with a lower height of the bevel.
A butt joint consists in the fact that the shape of the bevel of the edges can be straight, curvilinear, stepped or broken, and various combinations of the shapes of the bevel of the edges on two halves and from different sides of the joint are possible, determined by the technological needs of welding. For example, from the side of the smaller bevel of the edges, the bevel can be rectilinear, and from the side of the larger bevel - curvilinear, stepwise, broken. Other combinations of bevel shapes of the edges of such a connection are possible, for example, only one of the edges may have a bevel.
With the location of the proposed butt joints in a horizontal plane and welding with two arcs on both sides, one of the seams is simultaneously made in the lower and the second in the ceiling position. In the ceiling position, a less oblique part of the edges should be placed and arc welding in shielding gases with a consumable electrode or an arc with a non-consumable tungsten electrode with filler wire feeding. This is due to the fact that in order to avoid leakage of the weld pool in the ceiling position, it should have a significantly smaller volume than the bath in the lower position. In the lower position, the more beveled part of the joint should be placed and welding should also be carried out with an arc with a consumable electrode in shielding gases or a non-consumable electrode with filler wire.
Experiments on two-arc bilateral simultaneous welding showed that it is possible to increase the ultimate thickness that can be welded without cutting edges to 14 mm. This value can serve as a guide when assigning the value of the beveled and not beveled part of the edges in the proposed welded butt joints. Taking into account the fact that with an increase in the thickness of the elements being welded compared to the limit without a bevel of 14 mm, the heat sink to the edges increases and the penetration decreases, the value of the non-beveled part of the edges can reach 12 mm. Then the range of thicknesses of the elements for the proposed types of welded butt joints is 14-26 mm. The limiting depth of the bevel of the edges for this thickness range will be from 7 to 13 mm, respectively.
Suppose that double-arc welding at the same time on both sides is necessary to weld a plate with a thickness of 20 mm. We select the total height of the bevel of the edges of 9 mm, then the blunting value of 11 mm. With the ratio of the heights of the smaller bevel to the greater 0.2, the height of the larger bevel will be 9 / 1.2 = 7.5 mm, and the height of the smaller bevel is 1.5 mm. With the ratio of the heights of the smaller bevel to the greater 0.6, the height of the larger bevel will be 9 / 1.6 = 5.6 mm, and less than 3.4 mm. When two-arc two-sided welding can be ensured by the penetration of blunting the cutting edges 1 (figure 1). The remaining bevel 2 (figure 1) is fused. The choice of the blunting value and the ratio of the bevel heights of the edges depends on the thickness of the joined elements, the thermophysical properties of the material being welded, and the melting ability of the arcs.
If it is necessary to weld elements with a thickness of 24 mm, the blunting value can be selected 12 mm. Then the total bevel of the edges will also be 12 mm. With the ratio of the heights of the smaller bevel to the greater 0.2, the height of the larger bevel will be 12 / 1.2 = 10 mm, and the height of the smaller bevel 2.0 mm. With the ratio of the heights of the smaller bevel to the greater 0.6, the height of the larger bevel will be 12 / 1.6 = 7.5 mm, and less than 4.5 mm.
The proposed connection can reduce the cost of the electrode wire when welding butt joints of thicknesses above the limit, performed without cutting edges while simultaneous two-arc two-sided welding.
The connection can be carried out using means known in the art: known and used in the production of installations for cutting welded edges, installations for arc welding with a consumable electrode. Therefore, the proposed welded butt joint has industrial applicability.

Claims (1)

  1. A method of preparing the edges of parts for arc welding of a butt joint, including making double-sided bevels and blunting the edges of the welded parts to make a double-sided seam, characterized in that the bevels are asymmetric in the thickness of the parts with a ratio of the heights of a smaller bevel to a larger 0.2 ... 0.6 with a total the height of the bevels, not exceeding 50% of the thickness of the parts to be welded, with a smaller bevel located on the side of welding in the ceiling position.
RU2012138239/02A 2012-09-06 2012-09-06 Preparation of parts edges for arc welding of butt joint RU2524285C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2012138239/02A RU2524285C2 (en) 2012-09-06 2012-09-06 Preparation of parts edges for arc welding of butt joint

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2012138239/02A RU2524285C2 (en) 2012-09-06 2012-09-06 Preparation of parts edges for arc welding of butt joint

Publications (2)

Publication Number Publication Date
RU2012138239A RU2012138239A (en) 2014-03-20
RU2524285C2 true RU2524285C2 (en) 2014-07-27

Family

ID=50279822

Family Applications (1)

Application Number Title Priority Date Filing Date
RU2012138239/02A RU2524285C2 (en) 2012-09-06 2012-09-06 Preparation of parts edges for arc welding of butt joint

Country Status (1)

Country Link
RU (1) RU2524285C2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2686407C1 (en) * 2017-11-24 2019-04-25 Публичное акционерное общество "Транснефть" (ПАО "Транснефть") Reservoir wall repair method
RU189272U1 (en) * 2019-01-23 2019-05-17 Публичное акционерное общество "Челябинский трубопрокатный завод" (ПАО "ЧТПЗ") Blank for the manufacture of large diameter steel pipe with a wall thickness of up to 25 mm

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU283448A1 (en) * Cut to welding
JPS5728694A (en) * 1980-07-30 1982-02-16 Ishii Tekkosho:Kk Method for blast cleaning of welded groove part
SU1006138A1 (en) * 1980-07-25 1983-03-23 Предприятие П/Я М-5287 Method of two-side automatic welding of butt joints
CN101337301A (en) * 2008-08-06 2009-01-07 武汉钢铁(集团)公司 Submerged arc welding method of bridge steel of different intensity scale
CN101905365A (en) * 2010-08-10 2010-12-08 首钢总公司 Welding method of ultra-thick and high-strength water-power steel

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU283448A1 (en) * Cut to welding
SU1006138A1 (en) * 1980-07-25 1983-03-23 Предприятие П/Я М-5287 Method of two-side automatic welding of butt joints
JPS5728694A (en) * 1980-07-30 1982-02-16 Ishii Tekkosho:Kk Method for blast cleaning of welded groove part
CN101337301A (en) * 2008-08-06 2009-01-07 武汉钢铁(集团)公司 Submerged arc welding method of bridge steel of different intensity scale
CN101905365A (en) * 2010-08-10 2010-12-08 首钢总公司 Welding method of ultra-thick and high-strength water-power steel

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
АКУЛОВ А.И. "Технология и оборудования сварки плавлением", М., Машиностроение, 1977, стр. 195, рис. 100. *
ГОСТ 14771-76. Дуговая сварка в защитном газе. Соединения . сварные. 01.07.1977 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2686407C1 (en) * 2017-11-24 2019-04-25 Публичное акционерное общество "Транснефть" (ПАО "Транснефть") Reservoir wall repair method
RU189272U1 (en) * 2019-01-23 2019-05-17 Публичное акционерное общество "Челябинский трубопрокатный завод" (ПАО "ЧТПЗ") Blank for the manufacture of large diameter steel pipe with a wall thickness of up to 25 mm

Also Published As

Publication number Publication date
RU2012138239A (en) 2014-03-20

Similar Documents

Publication Publication Date Title
CN103008895B (en) Narrow gap multi-pass laser welding method for thick plate
KR101690360B1 (en) Method of and apparatus for hybrid welding with multiple heat sources
CN104493342B (en) A kind of unclear welding procedure of cut deal X-type groove
US8890030B2 (en) Hybrid welding apparatuses, systems and methods
EA017455B1 (en) Method for connecting thick-walled metal workpieces by welding
JP2014004603A (en) Laser-arc composite welding method
KR20140094579A (en) Submerged arc welding method for steel sheets
Lohse et al. Keyhole welding with CF-TIG (cathode focussed GTA)
RU2511191C1 (en) Multi-layer pipe welding method
JP6025620B2 (en) Submerged arc welding method, method of manufacturing steel pipe using the submerged arc welding method, welded joint, and steel pipe having the welded joint
CN104002029B (en) A kind of improved flat board butt joint submerged-arc welding
CN103934541A (en) Electro-gas welding technology suitable for thick plates with thickness ranging from 20 mm to 45 mm
CN104874919A (en) Thick plate and narrow gap laser welding method
US20190366463A1 (en) Gouging-less complete penetration welding method, and welded joint
RU2578303C1 (en) Method of laser-arc welding of vertical joints of thick-sheet steel structures
RU2524285C2 (en) Preparation of parts edges for arc welding of butt joint
EP2695694A1 (en) Method of welding of elements for the power industry, particulary of sealed wall panels of power boilers using MIG/MAG and laser welding
CN105108333A (en) Gas protection method used for laser-arc composite welding
RU2583971C2 (en) Submerged arc welding method for steel sheets
JP6382593B2 (en) Welding method
RU2679858C1 (en) Method of hybrid laser-arc welding of steel thick-walled structures
JP2010046671A (en) Welding method of lap joint
JP2010167425A (en) Welding method of vertical t-shaped joint, vertical t-shaped weld joint, and welded structure using the same
CN107570874A (en) Laser-arc hybrid welding process
JP2016107305A5 (en)

Legal Events

Date Code Title Description
MM4A The patent is invalid due to non-payment of fees

Effective date: 20150907