SU804323A1 - Device for welding shells of segments - Google Patents

Description

one

The invention relates to installations for assembling n submerged arc welding of longitudinal seams of cylindrical structures consisting of separate sections.

A known installation for arc welding of a longitudinal seam of a cylindrical shell, comprising a pressure beam with guides for the welding head and a cantilever rotary cradle with a lock of its position relative to pressure beam 1.

However, on this installation, the workpiece to be welded is installed onto the lodgement manually, the gap is selected with a simultaneous knob by alignment along the junction of the edges of the parapleted forming groove on the lining of the lodgement. When welding on these installations, the shell, consisting of several rolled sections, each time has to manually set each section in parallel to the forming groove and manually align the joints. With heavy workpieces, this is inconveniently unsafe for the worker and the plant capacity is lost.

The closest in technical essence and the achieved result is an installation for welding shells of segments, comprising a clamping beam mounted on the base with key clamps and a guide for welding a fixed head, a housing for an outlet with a lock of its position relative to the clamping beam and the feed mechanism of the shells sections and the welding position p1.

However, to reinstall sections

0 obek.ayki when. successive welding of all longitudinal welds requires unclamping the cradle every time, then turning the shaft of the section feed mechanism to the position

5 weld the next weld and re-fix the lodgement relative to the clamping beam, which reduces the performance of the installation.

The purpose of the invention is to increase the productivity by reducing the auxiliary operations for feeding and reinstalling the shell sections during the successive welding of all longitudinal seams.

five

To this end, the feed mechanism of the shell sections to the welding position is designed as two pairs of rotary eccentric shafts mounted on the base symmetrically with respect to the longitudinal axis of the assembly, with a driving rotary holder mounted on each of them, with a feed shaft, while symmetrically with respect to the longitudinal axis of the assembly mounted retractable stops for the edges of the shell sections.

FIG. 1 shows the installation, general view; in fig. 2 - the same kind of assembly; in fig. 3 is a section B-B in FIG. one; in fig. 4 shows a section B-B in FIG. 2; in fig. 5 is a view of FIG. 3

A clamping beam 1 (Fig. 1) is fixed to the base of the installation with guide rollers 2 (Fig. 2) and lever section clamps 3 (Fig. 3) consisting of spring-loaded keys and a rubberized sleeve. On the pressure beam, the guides 4 (Fig. 2) for the welding head 5 are mounted. With the help of the b axis (Fig. 1), the swiveling cradle 7 is fixed on the mounting frame. Swivel cradle 7 is connected to the cylinder 8. It is fixed copper lining. On the clamping beam 1, fixed rotary sliding stops 9 and 10 (Fig.Z). A rail track fits to the end of the installation, on which trolley 11 (Fig. 1) with guide rollers is placed. On the cradle 7 mounted clamps 12 for connection - with the clamping beam 1.

The installation is equipped with a feed mechanism for the shell sections in the welding position, made in the form of two eccentric shafts 13 installed on the basis of a symmetrical longitudinal axis of the installation, on which the cage 14 of the feed rollers 15 are mounted. The rotation of the eccentric shafts 13 is carried out by a rack and pinion gear 18 driven by a cylinder 19 (Fig. 2). This rotation changes the distance between the feed rollers 15.

The installation works as follows. ,

The stamped or rolled sections (the fourth part of the shell) are fed into the installation and placed between the rollers 15. The eccentric shafts 13 are turned on by the rack-and-pinion gear 18, which have the rollers 14 of the feed rollers 15, which result in the sections being clamped between them. At a sustained rate, the section feeds the feed rollers until the rear edge passes the weld line. Opposite feed rollers clamp this section together, and the rollers that feed the section open. After that, stops 9 are pushed in. With the setting speed, the section is moved in the opposite direction by feed rollers 15 to stops 9. Along

The stops edge of the section is set parallel to the welding line. Using the clamps with the 3 key, the section edge, sliding off the stops, is pressed against the copper lining placed on the bed 7. Then the left stops 9 are removed from the welding line, and the right stops 10 are installed. At this time, the second section is installed between the expanded feed rollers, clamped by them and fed until its front edge passes to the right stops 10. Along the stops, the edge is set parallel to the welding line, and the key of the second section is pressed against the copper lining.

After pressing, the stops 10 are removed than free the welding line. The welding tractor, moving along the joint, welds two sections. After the end of welding, the keys release the welded part of the shell, and the feed rollers move it until the rear edge passes the welding line. Then the left stops 9 are pulled out again and at the return course of the feed rollers the edge is set along the stops 9. After that, the edge is pressed with the keys to the copper lining. The stops 9 are removed and the stops 10 are installed.

The next blank is fed in the same way as the previous one. Welding takes place. After all the welds have been welded, the feed rollers open up, the keys retract and the locks 12 are rejected;

The proposed installation improves the performance of the assembly when welding the shells of the sections by providing automatic re-installation of sections for the successive welding of all longitudinal seams.

Claims (2)

Invention Formula A unit for welding shells of segments, containing a clamping beam mounted on the base with keyboard clamps and a guide for the welding head, a cradle for a product with clamps of its position relative to the clamping beam and a mechanism for feeding the sections of the shell to the welding position that differs from In order to increase productivity by reducing the auxiliary operations for feeding the shell sections during successive welding of longitudinal seams, the feed mechanism of the shell sections to the welding position is made in the form of connectors. based on symmetrically about the longitudinal axis of the installation of two Couples of rotary eccentric heads with a driving feed roller mounted on each of them, while on the pressure beam also retractable supports for the edges of the shell sections are mounted symmetrically with respect to the longitudinal axis of the installation. Sources of information taken into account during the examination 1. Welding equipment. Directory reference. Naukova Dumka, 1968, Part 2, p. 362-363. , 2. USSR author's certificate №574296, cl. At 23 K 37/04, 09.03.76. . | F Efe - |: -Vo; °: l: 4: .. o; .o.; V D) -, ::. . 1.G Oh. .; - 6-.o ;; pЧ,: :: .. : Ш г Г: °: -г;: ;; :with:-: ; ; isi :: K7 -V: -ci; v /: ii;:;. si: S о п. :: сг; ../. о -: - ;. about .-.-.. . ;: .dl.7ts ..:.:; 1);: ;; x 9ig.1. HI if