SU1542760A1 - Hold-down device for prewelding assembly of articles from sheet material - Google Patents

Abstract

The invention relates to welding, in particular to devices for assembling, for welding, products from sheet material, and can be used in assembling and welding box-shaped products. The purpose of the invention is to improve the quality of welding box-shaped products. The device comprises a base 1, a fixed support 2 with linings 3, clamps 4, 5, 6, 7 in the form of folding single-armed levers in the shape of the product. The levers are equipped with clamping jaws 12 with return springs with adjustable stiffness. Due to this, the required sequence is pressed from the middle of the part to the periphery. Then, one-sided butt welding of the pressed parts is performed. The surplus heat generated during welding is absorbed by the lining. 3 il.

Description

The invention relates to welding, in particular to devices for assembling, for welding, products from sheet material, and can be used in assembling and welding box-shaped products.

The purpose of the invention is to improve the quality of welding box-shaped products by ensuring consistent pressure from the center to the periphery of the product.

FIG. 1 shows a general view of a device for assembling products made from sheet material for welding; in FIG. 2 is a section A-A in FIG. one; in fig. 3 clamps, in the folded down position at the time of installation of the product.

The device contains a base 1-, on which the fixed

bearing 2 with pads 3, two pairs of clamps in the form of single-arm levers according to the shape of product C, 5 and 6, 7, which can be rotated on axles 8 and connected to each other with a coupling device 9 (Fig. 1). The rotation of the clamps can be carried out manually for small devices and with the help of an actuator (mechanical, pneumatic and central.) For large-sized devices.

On clamps k-7 fixed on ax x

10 strap 11 with clamping jaws 12 (Fig. 2). The hose 13 is laid between the clamps and the strips forming a channel of the same cross section along the entire inner perimeter of the clamps. The return spring 1 is connected to the bar.

11 with the help of a finger 15. Inside the pads 3 there are channels 16 for the inlet

protective gas to the lower side of the edges of the assembled and welded parts;

The pads 3 form a contour that repeats the exact dimensions of the inner surface of the assembled parts 17 (Fig. 3).

The clamping device operates as follows.

In the initial position, the clamps of the C-7 are folded back. Details 17 is lowered onto the pads 3 of the support 2 so that the end edges of the parts are joined over the middle of the pads 3 (Fig. 2). After that, the clamps are brought to the working position and are connected to each other by a coupling device. (Fig. 1). Then compressed air is supplied to the hoses 13, which press down on the bar 11. The bars, overcoming the resistance of the return springs H, rotate around the axes 10 and press the edges of the parts 17 to the pad 3 with the jaws 12. Since the spring stiffness is different, the bar from which spring with less rigidity, presses the part earlier and with great effort. This achieves the necessary pressing sequence from the middle of the upper part of the part to the corners and from the corners downwards of the vertical side parts.,

After that, one-sided butt welding of the pressed parts is performed. In this case, the lining channels to the back side of the seam are supplied

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shielding gas, and the excess heat generated during welding is absorbed by the lining. This ensures high quality welding of thin-walled parts.

After welding, the compressed air supply to the device hoses is stopped, the return springs are removed from the part with the clamping jaws, the clamps are released and pivoted away, and the welded parts are removed from the supports lining.

Claims (1)

Invention Formula A clamping device for assembling for welding products made of sheet material, containing fixed-on-base with supports mounted on the base, which enclose clamps, each of which is made in the form of installed opposite-folding single-arm levers according to the shape of the product, characterized in that box-shaped products by ensuring successive pressing of the product from the center to the periphery, the clamps are equipped with clamping bars rotating in the plane of tilting of the levers ennymi lever and pivotally connected thereto, equipped with clamps return springs with adjustable stiffness, hoses for turning the slats and a source of compressed air to the hoses. 1 FIG. 2 3 with