SU1569147A1 - Mould for thermit welding - Google Patents

Abstract

The invention relates to welding, namely thermite, and can be used in the national household for welding metal reinforcing bars in a horizontal position. The purpose of the invention is to reduce the consumption of refractories and simplify the manufacturing technology of the mold. A part of the reaction chamber 1, near the pouring cup, is made with a cavity for filling the lining powder, and the rest of the lining is packed with a gasket. The reaction chamber is joined to a separately manufactured welding chamber. In the welding chamber there are channels 11, 12 for the exit of gases and channels 13, 14 for the discharge of thermite slag after the metal has been cast. The design makes it possible to improve the quality, reduce the consumption of refractory material for the manufacture of the mold, and expand the range of materials for the manufacture of the molds. 1 hp f-ly, 1 ill.

Description

The invention relates to welding, namely thermite, and can be used in the national household for welding metal reinforcing bars in a horizontal position.

The purpose of the invention is to reduce the consumption of refractories and simplify the manufacturing technology of the mold.

This is achieved by separating the reaction and welding chambers in the process and manufacturing, their subsequent joining before conducting thermite welding, ensuring the exit of gases from the welding chamber, and also draining the thermal slag

The reaction chamber consists of two parts: the upper conical part is made with printed magnesite lining, and the lower part with filling nominal cup is filled with powdered magnesite, which forms the gate with printed Yari lining fixing the lower part to the upper wedge locks.

This reaction chamber design allows for a quick and easy insertion with a molten lam- ple, retaining the pad lining for multiple use.

The welding chamber is made separately from a refractory material, and to dock with the reaction in its upper part there is a cavity into which the metal enters from the reaction and then from it through two vertical channels into the welding chamber, washing the ends of the reinforcement. Two horizontal channels for thermite slag discharge after filling the welding chamber with thermite metal depart from the upper part of the receiving cavity. They also serve to exit gases from the welding chamber through a system of two inclined channels connecting them with the upper part of the welding chamber.

Refractory vessels may be placed on the welded mold to accept the slag.

The drawing shows the proposed composite form, consisting of separate reaction and welding chambers, a general view.

The upper conical part of the reaction chamber 1 with the stuffed lining 2 forms a gate with bulk magnesite 3 in the lower conical part of the reaction

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chamber A with an interchangeable cup 5 when fastening the lower part to the top with the help of wedge locks 6.

The reaction chamber assembly is aligned along the axis of the cup with the receiving cavity 7 of the welding chamber, from which thermite metal is poured into the welding cavity 10 along two vertical channels 8 and 9. At the same time, gases from the welding cavity are removed along inclined channels 11 and 12 connecting the upper a portion of the cavity with channels 13 and 14 for discharging thermite slag after filling the welding mold with metal.

The first portion of the metal contaminated with oxides enters the cavity-trap 15, and the oxides and slag inclusions remaining on the surface of the metal in the weld pool are displaced into the channels 11 and 12.

Removal of gases from the welding chamber, as well as contaminated metal into inclined channels, increases the purity of the weld metal.

The use of the proposed form improves the quality of the compound; simplify the change of pouring cup and reuse the padded lined part of the reaction chamber; simplify the manufacturing technology of the mold and expand the range of refractory materials for the manufacture of the welding chamber.

Claims (2)

1. A thermite welding mold consisting of a reaction chamber with a pouring channel and a melted gasket and a welding chamber with a receiving cavity, characterized in that, in order to reduce the consumption of refractories and simplify the manufacturing technology of the molds, separately from the welding chamber of two parts, of which the top is equipped with a magnesite lining, and the part near the filling cup is provided with a cavity for filling with powdered magnesite and mounted on the welding oh chamber, and the axis of its receiving cavity coincides with the axis of the casting channel. 515691 76 2. The form according to claim 1, is characterized by the channels for slag discharge, so that, with the aim of increasing the connected inclined gas outlet, the quality of the welded joint in the channels with the part adjacent to the inlet to the inlet pblosti part of the welding chamber, the receiving cavity of the welding chamber