SU1058746A2 - Production line for manufacturing bimetallic tubes by means of diffusion welding - Google Patents

Abstract

STREAMING LINE FOR MANUFACTURING OF STVA OF BIMETALLIC PIPES WITH DIFFUSION WELDING BY AUTH. 884914, characterized in that, in order to simplify the technology and increase productivity, it is equipped with an additional penetrating furnace, and the device for diffusion welding is made in the form of a sealed chamber.

Description

ate

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The invention relates to equipment for the manufacture of trub. B and can be used in the manufacture of bimetallic pipes by diffusion welding.

According to the main auth. No. 884914 is a known production line for the production of bimetallic pipes by diffusion welding, containing a mechanized rack for assembling billets, a drawing mill, rollers, a through-pass kiln for inlet and outlet billets, a cooling device and a device for removing welded pipes. A cutting machine was installed in front of the furnace, and a device connected to it for diffusion welding of billet Sh.

The disadvantages of the production line are the complexity of the technology and low productivity.

The purpose of the invention is to simplify the technology and increase productivity.

This goal is achieved by the fact that the flow line for the production of bimetallic pipes by diffusion welding, is equipped with an additional continuous furnace, and the device for diffusion welding is made in the form of a sealed chamber.

The drawing shows a flow chart for the manufacture of bimetallic pipes by diffusion welding.

The production line for the production of bimetallic pipes contains a mechanized loading table 1, an isothermal holding furnace 2, a loading mechanism 3, a gas sealed chamber 4 for diffusion welding of tube blanks, an additional heating furnace 5 connected through the roll bars b , 7, 8, and 9, and chain conveyors 10 and 11, which move from the unit to the unit of container 12 with the pipes to be processed.

The flow line for the production of bimetallic pipes operates as follows.

A double-layered pipe or package of such pipes from loading table 1 pre-articulated in a drawing mill enters container 12 filled with molten salt or glass. Then the container 12 with pipes about

walks through an isothermal holding furnace 2, in which the temperature of the pipes is raised to the temperature of thermal diffusion welding, and the loading mechanism 3 along the transport roller table 7 and the empty roller table of the sealed gas chamber 4 enters the container. The chamber lid is closed and the sealed chamber is filled with high-pressure gas.

0 Under the pressure of the environment, which is equal to the pressure of the gas in the hermetic chamber, the layers of a two-layer pipe are squeezed and firmly welded together with each other over the entire contact surface.

After the gas is removed from the sealed chamber 4, it is opened, and the container with pipes by the loading mechanism 3 is removed from the sealed chamber.

0 to the transport roller conveyor 7. The chain conveyor 10 carries the container with pipes to the roller conveyor 8, installed in front of the additional heating furnace 5. Here the bimetallic pipes are removed from the container and material is added to it that melts the melt when heated. At that time, the next container with pipes was removed from furnace 2 to the roller table 7. It was introduced into the gas-tight chamber 4 for pressure diffusion welding. The container without the pipes with the added material is fed by the roller table 8 to the supplementary

5. Pass furnace 5 for heating the melt. As the furnace progresses in the furnace, the melt is heated to the following: thermodiffusion welding aeration, leaves furnace 5 on roller table 9 and chain conveyor 11 moves it on roller table 6 to receive the next two-layer pipe or package of pipes. Next, the container with the pipes goes to the isothermal holding furnace 2 for heating, and the cycle is repeated.

Thanks to the use of a sealed chamber for the distribution of billet billets and an additional through-pass furnace, the technology is simplified and the productivity of the process is increased, since there is no need for individual sealing of billet before dispensing and allowing parallel

5 heating of the container with the melt to the temperature of diffusion welding.

The use of the invention in comparison with the basic object allows increasing the productivity by two and more times and simplifying the technology.

Claims (1)

FLOW LINE FOR PRODUCING STV BIMETALLIC PIPES DIFFUSION WELDING on avt.Sv. No. 884914, characterized in that, in order to simplify the technology and increase productivity, it is equipped with an additional feed-through furnace, and the device for diffusion welding is made in the form of a sealed chamber.