RU2755229C1 - Device for assembling for welding rods with shells - Google Patents

Abstract

FIELD: engineering industry.

SUBSTANCE: invention relates to a device for assembly for welding of rims with shells and can be used in the engineering industry. The device contains a frame with driven roller supports mounted on it, designed to accommodate the assembled product on them. Tension modules consist of a pair of tensioning mechanisms. Each of the tensioning mechanisms contains a welded metal frame with linear guides fixed on it, a carriage and a screw gear, kinematically connected to the flywheel for linear movement of the carriage and its coordination relative to the band on the shell. A pneumatic cylinder with a rod is fixed in the supports on the carriage racks. On the forks of the rod of the pneumatic cylinder, the lugs of the connecting links of the pressure devices are fixed by means of the axes. Each of the hold-down devices comprises a flexible metal structure. The design consists of two identical parts of multi-link elements, consisting of smooth rollers and hollow rollers, step by step connected by intermediate plates. At the ends of the hold-down devices, bent brackets are fixed, forming a single lock.

EFFECT: possibility of carrying out the technological process of assembly without additional centering of the product when installing it for welding.

1 cl, 4 dwg

Description

The device for assembly for welding of rims with shells relates to the field of metal welding, in particular to devices for assembly of rims with shells for boilers of large-sized containers, in particular of tank boilers, and can be used in the machine-building industry.

A device for assembling and welding shells from segments is known from the prior art (patent SU 574296, IPC B23K 37/04, publ. 09/30/1977, bull. No. 36), contains a foundation with a backing and clamping beam and a welding head, equipped with a trolley mounted on the foundation, and the unit for fixing the shell segments, fixed on the trolley and made in the form of a pivot bracket mounted on the shaft, mounted at one end
in a split, height-adjustable bearing mounted on a trolley, and also installed on the shaft of two parallel groups of replaceable expanding rods, while the backing beam is fixed on one of the mentioned rods, the device is additionally equipped with a second backing beam also fixed on one of the rods, and on the other two rods the support strips are fixed, and on the underlay beams with the possibility of movement there are brace-shaped clamps for the shell.

The disadvantages of this technical solution is the impossibility of assembling bands with shells of boilers of large-sized containers and performing circular seams after the assembly operation.

Also known from the prior art is a device for assembly for welding of circular joints of shells of large-sized containers (patent RU 122934, IPC B23K 37/04, publ. 20.12.2012. Bull. No. 35), including roller supports and means for assembling and fixing the circular edges of shells, characterized in that the means for assembling and fixing the annular edges of the shells are made in the form of locks, evenly installed along the perimeter of the circumference of the abutting edges of the shells, each of which consists of two sliders mounted on the tie rod and moved along it by means of nuts, in the upper part of each slide there is a clamping the sponge is displaced to the slider end, external with respect to the plane of the junction of the shells, the inner contact plane of the clamping jaw is made with a slope towards the plane of junction of the shells, forming an acute angle between the contact and upper planes, while at the ends of the shells there are beads with an internal slope opposite to the slope sponges of the corresponding lock slider.

The disadvantages of this technical solution are:

- the need for mechanical processing of abutting products;

- the installation of fixing elements along the perimeter of the circle requires significant auxiliary time, due to their disconnection into a single fixing structure.

In addition, the prior art knows the design of a device for assembly for welding of rims with shells (patent SU 1699751, IPC B23K 37/04, publ. 23.12.1991. Bull. No. 47), containing a housing with guides mounted on it, a drive in the form power cylinder and clamping jaws, a slider is mounted on the power cylinder rod with the ability to interact with the specified jaws, each clamping jaw is made in the form of a lever-hinged two-link linkage hinged on the body, in one of the levers of which a groove is made, the slider is equipped with rollers mounted on the slider with the possibility of alternate interaction with the levers of the lever-articulated two-link and hinged pushers with pins, while the axes of the hinged joints of the slider with the pushers are parallel to the axes of the rollers of the slider, the pins of the pushers are installed with the ability to move in the slots of the levers of the lever-articulated two-link, and each lever is equipped with cams with a groove installed with the possibility of rotation in plane perpendicular to the rollers rotation axes.

The disadvantages of this technical solution are:

- the impossibility of ensuring a uniform pressure of the bandages against the boiler shell due to the design feature of the lever-hinge mechanism (insufficient number of pressure points);

- the need for additional centering of the product when installing it for welding;

- there is no possibility of installing products of various standard sizes.

This technical solution was adopted as a prototype.

The problem to be solved by the claimed technical solution is the creation of a device for assembly for welding of rims with shells, providing a uniform force of pressing the rims to the boiler shell without additional centering of the product.

The technical result consists in the possibility of carrying out the assembly process without additional centering of the product when installing it for welding with a simultaneous increase in productivity (quality).

The problem is solved, and the specified technical result is achieved by the fact that the device for assembly for welding of rims with shells contains a frame with driven roller bearings mounted on it, designed to accommodate the assembled product on them, tension modules consisting of a pair of tension mechanisms, while each of the tensioning mechanisms contains a welded metal frame with linear guides fixed on it, a carriage and a screw gear, kinematically connected to the flywheel, designed to carry out linear movement of the carriage and coordinate it relative to the band on the shell, a pneumatic cylinder with a rod, fixed in supports on the carriage posts, the lugs of the connecting links of the pressure devices fixed by means of the axes on the forks of the rod of the pneumatic cylinder, while each of the pressure devices contains a flexible metal structure consisting of two identical parts of multi-link elements consisting of smooth rollers and p hollow rollers, step by step connected by intermediate plates, while bent brackets are fixed at the ends of the clamping devices, forming a single lock.

The essence of the claimed invention is illustrated by graphic material:

FIG. 1 - Device for assembly for welding of rims with shells;

FIG. 2 - Tensioning mechanism (main view);

FIG. 3 - Tensioning mechanism (top view);

FIG. 4 - Clamping device.

The device for assembly for welding of tires with shells contains a frame 1 on which drive roller supports 2 are installed, tension modules 13 (the number is determined by the number of welded tires) consisting of a pair of tension mechanisms 3 and 10.

Each of the tensioning mechanisms 3 and 10 contains a welded metal frame 14, in the structure of which a helical gear 20 is placed, designed to carry out the linear movement of the carriage 18 and coordinate it relative to the band on the shell. On the racks of the base of the carriage 18 in the supports 17 there is a pneumatic cylinder 16 fixed to the central suspension. The linear movement of the carriage 18 occurs along the guides 15 of the bed 14 and is carried out manually by rotating the flywheel 19. The process of movement of the carriage 18 with the pneumatic cylinder 16 is visually monitored.

On the fork of the rod 4 of the pneumatic cylinder 16 of the tensioning mechanisms 3 and 10, the lugs of the connecting links 6 of the pressure devices 11 and 12 are fixed through the axes 5.

Each of the pressure devices 11 and 12 is a flexible metal structure, consisting of parts 7 and 9, formed by multi-link elements 21 and 25. The multi-link elements 21 and 25, in turn, consist of smooth rollers 23 and hollow rollers 22, stepwise connected by intermediate plates 24 At the ends of the multi-link elements 21 and 25, bent brackets 26 are fixed, forming a single lock 8.

The device for assembling for welding of rims with shells works as follows.

The product (for example, a tanker boiler) is installed on driven roller supports 2. The required number of bands is placed on the product. By rotating the flywheel 19 of the helical gear 20, the position of the hold-down devices 11 and 12 is coordinated with respect to the bands to be welded. Clamping devices 11 and 12 are placed on the bandages and with the help of bent brackets 26 are fixed in the lock 8. By turning on the pneumatic distributor in the operating position, air from the line is supplied to the rod cavity of the pneumatic cylinders 16. The clamping devices 11, 12 are tensioned and, accordingly, the bandage is pressed against the shell of the product. After welding the shroud, the pneumatic valve is turned on in the reverse position. Air is supplied to the rodless cavity of the pneumatic cylinder 16, while the tension of the hold-down devices 11 and 12 is removed. The drive of rotation of the roller supports 2 is switched on and the product with the bandage is rotated to the required angle. The process of pressing and welding of the band is repeated until complete assembly with the product. After the completion of the assembly process, the bent staples 26 are unlocked, the hold-down devices 11 and 12 are thrown aside, freeing the product, which is transferred to the next technological operation.

The device for assembly for welding of rims with shells has been introduced into technological production at JSC "Scientific and Production Corporation" Uralvagonzavod "and has confirmed its technical and economic efficiency in comparison with the previously used devices.

Claims (1)

A device for assembly for welding of rims with shells, characterized in that it contains a frame, drive roller bearings mounted on it for placing the assembled product on them, tension modules consisting of a pair of tensioning mechanisms, while each of the tensioning mechanisms contains a welded metal frame with linear guides fixed on it, a carriage and a helical gear kinematically connected to the flywheel for linear movement of the carriage and its coordination relative to the band on the shell, a pneumatic cylinder with a rod fixed in supports on the carriage racks, fixed by means of axes on the forks of the pneumatic cylinder rod, lugs of the clamping links devices, while each of the clamping devices contains a flexible metal structure, consisting of two identical parts of multi-link elements, consisting of smooth rollers and hollow rollers, step by step connected by intermediate plates, while at the ends of the clamp bent brackets are fixed to form a single lock.

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