SU725858A1 - Assembling and welding stand - Google Patents

Description

(54) ASSEMBLY WELDING STAND

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The invention relates to welding, in particular to the production of welding equipment and can be used in welding panels of aluminum alloys, for example in shipbuilding.

In the shipbuilding industry, light aluminum alloys in the form of sheet panels and panels with a stiffener have found wide application ...

Known assembly-welding devices used in the welding of sheet panels, such as installation for one-sided welding of curvilinear panels 1. This installation contains support struts on which the welded product is laid, a movable portal with the element that provides hemming from the racks, and clamps. The element for removal of the products being welded from the supports is made in the form of a frame with a through slot, at the outlet and the entrance of which the inner surface, which serves as a support for the product, is made inclined.

It is also known a device 2 intended for the assembly of joints for automatic welding, consisting

from the U - shaped frame, the top of which consists of two beams and serves as the top clamp of the open type. On the guides of the upper clamp moves the welding tractor.

Bottom clamp rotary pneumatically driven mechanism to press the edges has a forming slip.

However, in the known device, the welding of long joints as a result of the creation of large forces Press the edges, the effect of the torque generated by the lower clamp on the beams of the upper clamp; so large that they twist along the longitudinal axis, this leads to the non-adherence of the welded edges and the forming lining, an increase in the assembly gap, the appearance of the p illage of the edges.

A stand assembly-welding 3 is known, containing a frame with a lodgment for installing panels and a pressure beam associated with chill cylinders.

However, when welding with the help of a known device, the possibility of the occurrence of welding deformations in products due to the uneven pressing of the welding panels is not excluded. The purpose of the invention is the reduction of welding deformations nVfeKf ShVSHE nor uniformity of pressure of the welded panels. To do this, transverse arcuate ribs with convex curvature are located on the sakpen eHH lodgement, and the drive clamping brackets are placed along the lodgement, with frames on both ends of the pressure beam being hinged at the top crossbar, bottom link and two side levers, and on the frame, on the side of the ends of the beam, there are side projections, with the cylinders mounted on the said protrusions of the frame and connected to the upper, crossbar and lower thrust. Yafig. the stand assembly and welding, a general view is shown; in fig. 2 desktop lifting mechanism; Fig. 3 shows the section A-A of the stand of the p6diema-clamping mechanism; Fig. 4 shows the section B-B of the clamping block; Fig. 5 and b: locking devices with wedges for stretching the sheets, sections C-C and DSborO-welding stand Includes desktops 1. with the start-up mechanism 2, pivotally connected to the aero-support 3 through one shoulder of the lever 4; second lever arm 4 angular contact double-sided sliding bearing 5 is connected with 5 x diagonal of the working table 1. The stand also contains a frame 7 with a lodgement 8, WEDGES 9 with supporting necks clamping brackets 10 with a drive mechanism 11 pressing beam 12 with a working tool 13, installed on longitudinal guides 14, hinged frames 15 with a vertical bridge Dina 16 and lower th 17, Dya side levers 18 and power cylinders 19; ycTajj o; BJieHHbie on the lateral projections 20 of the bed 7. On the lodgement 8, there are guperesely arc-shaped ribs 21 with convex curvature— The welding and welding stand works as follows. . . :. . A plate with welded and lead-in strips — with a central hole — is laid in a known manner onto the worktable 1 with the lifting mechanism 2 turned on, transferring the force to the middle part of the lever 4 one arm through a radially resistant two-way sliding bearing 5 connected to the lower diagonal of the workbench one,. and the second console arm of the lever 4. is connected with the aero support 3. Perceived lifting force 2 from the lift, the second shoulder of the lever 4 lifts working table 1, and compressed air supplied to the aero mounts m 3, psvzlyyёt to bring working station 1 with the laid panel in the assembly area of the stand all the way with the included clips 10, tiNtra1TO: d

725858 holes on the lead-in plate;: enter the bearing necks of the wedges 9. Clamping the brackets 10 is retracted into the initial position. Drive mechanism 11. On the second work table 1, a panel is placed, which is placed on the aspodrtopax 3 in contact with the already laid panel . The power cylinders 19 are activated, and the force through the side levers 18 is transmitted to the clamping jig 12, which is elastically deformed along the curvature of the supporting surfaces of the ribs 21, presses the folded plates, while simultaneously pressing on the supporting necks of the wedges 9. The plates are stretched with a force of 0, 7-0.8. A working tool 13 is included which welds the joint. The curvature of the ribs 21 in the form of a convex parabolic curve, equal to the arrow deflection of the beam 12 in the elastic deformation region, makes it possible to create a voltage in the edges of the welded edges of the panels that are reverse welding, with one-way single-pass welding, the clamping brackets 10 with the drive mechanism il are placed on one side of the stand due to that in the initial position under the raised clamping beam 12, a panel is attached to the worktable 1 on the side opposite to the clamping brackets 10, which fixes the ends of the cocked clamping brackets 10, the last ones. zmom actuator 11 are omitted from the side of the clamping bracket 10 is supplied to the second sheet contacting / s previously laid. After pressing the edges of the laid sheets along the entire length of the clamping beam 12 on the lodgement 8 of the bed 7, the ribs 21, having a curvature equal to the deflection boom of the clamping unit in its elastic region, and the welding process is carried out, the welded panel moves to the side opposite to the location of the fixing brackets , and after the edge of the cloth passes behind the welding plane, the clamping clamps, brackets 10 are fixed, the edge of the panel is fixed on their ends, then the clamping brackets 10 lower to their original position, and from their side A new cloth up to the contact with the already fixed cloth. The crimping and welding process is repeated. The process of welding sheets with stiffeners is similar to the previous one, only the height of the working table is reduced to the height of the ribs using the lifting-lowering mechanism 2. In connection with the unification of the clamping unit with the working tool in the form of a three-phase welding torch with a system for welding current supply and protective gas1, increases quality

Claims (1)

Claim Assembly and welding stand, containing a bed with a lodgement for mounting panels and a pressure beam connected to power cylinders, characterized in that, in order to reduce welding deformations by increasing the pressure uniformity of the welded panels, transverse arcuate ribs with convex curvature are fixed on the tool tray and on the bed, placed along the lodgement, drive clamping brackets while frames are mounted on both ends of the clamping beam in the form of an upper crossbar, a lower link and two side levers, and on the bed, from the side of the ends of the beam, lateral supports are fixed, and the cylinders are mounted on the said protrusions of the bed of the connection with the upper crossbar and lower link.