Process for preparing extra-thick or composite pipe blank by injection moulding and device thereof

Abstract

The invention relates to a process for preparing extra-thick or composite pipe blank by injection moulding and a device thereof. Molten steel is poured into a pouring basket, spruing is carried out when molten steel in a pouring basket is accumulated to certain level, the molten steel flows past an atomizing nozzle by virtue of a atomizing nozzle, the atomizing nozzle is fed with gases at high pressure, atomizing injection is carried out on the molten steel flowing past interstitial hole thereof, so as to form an atomized cone, the atomized cone is deposited to a ring deposition case, the ring deposition case is sheathed onto a dummy ingot mechanism which can move up and down and rotate, the dummy ingot mechanism drives the ring deposition case to rotate continuously while the molten steel is atomized and deposited, metal liquid drops deposited above form an annular atomizing layer, the annular atomizing layer is continuously deposited and lengthened while the dummy ingot mechanism moves downward, and finally a pipe blank is formed; the other side of the atomizing nozzle is provided with a roller which rolls the pipe blank formed by atomizing and deposition. The invention is used for preparing extra-thick pipe blank and composite pipe blank, and processing equipment is simple, thus being convenient for continuous production.

Description

technical field [0001] The invention relates to steel pipe manufacturing technology, in particular to a technology and device for preparing extra-thick or composite pipe blanks by spray forming. Background technique [0002] The usual seamless tube blank is rolled from a solid tube blank after piercing. [0003] According to different production methods, it can be divided into hot-rolled tubes, cold-rolled tubes, cold-drawn tubes, extruded tubes, etc. [0004] (1) Hot-rolled seamless pipes are generally produced on automatic pipe rolling units. After checking and removing surface defects, the solid tube blank is cut into the required length, centered on the perforated end face of the tube blank, then sent to the heating furnace for heating, and pierced on the piercing machine. Spin and advance the solid blank inside the process of piercing holes under the influence with the roller as well as the end. Then the solid blank is hollow finally, which is called gross pipe. Send...

AI Technical Summary

Problems solved by technology

[0017] 1. Composite tube blanks cannot be produced;

[0018] 2. If high-alloy and high-hardness tube blanks are prepared, the consumption of the plug will be serious, and the production cost will be high;

[0019] 3. The extrusion equipment is complex and requires high precision control;

[0026] 1. Composite tube blanks cannot be processed;

[0027] 2. For extra-thick steel pipes, it cannot be fully realized during the induction heating modulation process;

[0028] 3. The manufacturing process of welded pipe is complex and requires high control precision

But its disadvantage is that the substrate, deposition blank and substrate support seat need to move back and forth in a straight line during the preparation process.

Due to the large mass of the deposition blank and the parts that move together, the inertia is very large and difficult to control, which restricts the size and mass scale of the deposition tube blank, and at the same time makes the reciprocating speed impossible, and also restricts the cooling rate of the deposition blank

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