SU1530366A1 - Method and apparatus for removing flash - Google Patents

Abstract

The invention relates to gas flame treatment of metals and can be used in the continuous production of pipes and profiles obtained by pressure welding. The purpose of the invention is to improve the quality of weld processing, productivity, processability and reliability of the device. The burr is removed by burning it with an oxidizing gas, which is fed by oppositely directed jets at different angles to the surface to be treated and at different distances from the point of convergence of the edges in the upset zone. The first jet is fed to a distance of 0.3 - 0.9 lengths of the precipitation zone, and the second - to a distance equal to (2-5) D ₁ / SINΑ ₁ , where D ₁ is the diameter of the outlet

SIN Α ₁ is the angle of supply of the first jet of oxidizing gas. Heads 1 and 2 are connected by means of hinges 3 and 4 to independent oxygen lines 5 and 6. Installing the second oxygen line 6 with the possibility of axial movement relative to the first 5, as well as the presence of axially movable replacement nozzles 7 and 8, allows smooth adjustment over a wide range necessary parameters of the method. 2 sec. and 1 z. p. f-ly, 2 ill.

Description

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The invention relates to the suitability of pressure welding of structures, in particular pipes, and can be used in the continuous production of pipes and profiles.

The aim of the invention is to improve the quality of deblocking, productivity and processability of the process, as well as reliability of the device.

FIG. Figure 1 shows how to carry out deburring in pipes (LCB draft length; I -) the distance between the axes of the active zones of jet action at the intersection with the surface of the pipe; ot ,, 1/2, yi - ly of supplying the jets of oxygen to the iverpership); in fig. 2 is a section A A in FIG. one.

The method is as follows.

Continuously riocTynaioiueii edges are fed to the welding device of a coarse workpiece with a monochrome and.: 1 and contact (not shown) high frequency current, they are heated to the melting temperature at the point of convergence. Further, at the site of the slab, the Lee precipitates the edges to squeeze and, in this case, the reinforcement Ipva I par is formed outside and inside. The state consists of oxides, melted and plastic phases of metal, la.

On the inside of the pipe f rat, the zone is located at a distance from the point of convergence of edges at a distance of 0.3 0.9 zone lengths (Left tubs, in the plane of the junction under pressure km1, they supply PO 1 yi.iioM 30-11.I: aiji-oMic from a nozzle. Ei of this zone iii. -ii / b iv l metal ipara pptentsyK ociijiB i.i. ii; sg) iodine acts 11 and 1 cm of gas-oxide, and. . - ii .. ly in the form of 1plaka Stoklkp down,, chi ... - It goes on 1X1 1n: 1i, dslyu.ipggge. and,; ) nis; ii heating is cooled) 1puk) zone P1va and. ; g1KI grata.

The second jet of gacha - () acid.1.1, 1 upstream of the movement d) is discharged from) to) the distance t is equal to () m (2 ... T)) d, / sin Xi from the first). at the angle of dLi, the remains of 11odot () with grat burnt are also burned in the planar e and clean the surface of the weld joint.

The jet supply angles i aza-oxidant ОЦ, pij, pressure and consumption i aza-oxidize, are regulated separately for each jet depending on the welding speed and ve; formed) grat (tolpiiil wall) of the welded pipe.

The method is implemented by means of a device represented by a mouth; i) in the shadows on Ptanga (not shown) in a 11.pluck (welded head Nos. 1 and 2, connected by means of P1arnirov 3 and 4 with kis.) |)) with wires 5 and 6. Nozzles 7 and 8 are movably mounted in heads 1 and 2, facing each other nodes with different angles o6 and (A, 2 to the surface of the pipe), iipn this kis, trood conductor) 2 with it, the ability of its movement along the ipy axis would be what is provided for: the decay of oxygen jets and the angle of their attack for

choice of the optimal mode 1 Grata. The device has all the neoOhhg units of the installation and air conditioning with the regulation of the movement of the oxygen line 2, as well as the cooling system (not shown). Oxygen wires and heads with cocks are located in the casing 10.

The device works as follows.

Oxygen (, Д HociynaeT through two independent pipelines 5 and 6, internal loading 9 and through supply channels 1 to heads 1 and 2, then through nozzles 7 and 8, adjust to the zone of precipitating edges. Nozzle; 7) , 30 ... 60 ° to the surface of the pipe 9,

5 which is chosen depending on the welding speed and the crowd, the edges of the welded edges, the second jet 8 of the second jet (i itTCH anchors at an angle of 30 ... 50 ° nepeMeiiienneMnm; .hg: - with oxygen supply D VS4 rygchet (2, ..

0 / sin JL, between r) with mi in the zones of the n. Intersection of their internal (.; P: and rGo1 trub) l set-ups with 7/1 7 | 1 | ае1 с depending on m and on the velocity) LI I-that. 1P1Ip1 sva ;. and; and kromg to dl .jof liver 1, e) bypass - L:

ve.tychiny and ((atkon grata, linn p.ch- with mene-scientific research institute yulschipy stenkk welded pipe

imeg.itch.ch I and di%; e; kan kan, tov by replacing salt 7 and 8.

1) and sni. Hei Hi; (increasing or decreasing iieiHinl y .cho iiij.uiMH jets soo i

pt.tmzhayu i with II. II ccdp yp and t ortsi sop.t to i4) pa6; iTi, i,) ai;, viMi surface that pair iiiaer. tgnamiku shake. Installing ciMie i with options and gk.) (JceBoro interleave allows ivier -ciiJaHHib this lack.

An example. 11proiz (.) Dst rude 0 159x7 mm

from steel 16G2S at a welding speed of 40.0 m / min. The length of the precipitation zone is 49 mm. In the device for the supply of gas-oxide-, | dia diameter) nozzles d, m.m, angles ycrafioBKn dL /.,, Jjf 45, scattering

- Between the struts of 1 5x5 / sin60 ° -29,0 mm from the ends of the nozzles to the surface of the Umm pipe. lepByio jet feed on pare goin; -, 0.8l, i: .ii 0.8x49 39.2 mm for the point of convergence, the second one at a distance of 68.2 mm. Received 1 tune residue g) ata - 0.1 0.2 mm with

5 pita and the surface.

The implementation of this method 10 1 results in the quality of the surface being processed during gas processing.

50

Claims (3)

1. A method of removing a burr, including heating and slumping of the edges, feeding deformation gas into an oxidant with two jets, dyed nodes once. Angles to the surface, which is different from that. With a view to improving the quality of processing a welded joint, it produces e, tnosgi and tehnolochnichnost process. As the welding progresses, a jet of oxidant gas is fed into the zone at a distance of 0.3 - 0.9 the length of the precipitation zone, and the second jet - at a distance determined from the ratio (2 ... 5) ci, / sin, from the first, 1 de d, is the diameter of the outlet of the first nozzle, cX "is the angle of the first jet to the surface to be machined. 2. A deburring device containing in-plane welding rods, an oxygen line and a head with high-directional channels for supplying an oxidizing gas in it, which, in order to improve the quality of the weld and reliability of the device, it is equipped with an additional head with a channel for supplying an oxidizing gas, opposite to the channel of the first head, and an additional oxygen line that can be axially moved relative to the first oxygen line, with both heads pivotally connected to Bo. L adjusting the angles of supply of the oxidizing gas with oxygen lines placed outside the welding plane. 3. The device according to, 2, characterized in that the heads are equipped with interchangeable nozzles in the axial direction. /; - x f1 / e.2