A filling medium for extruding pipe-through parts and a manufacturing process of pipe-through parts

A technology of filling medium and manufacturing process, which is applied in the field of pipeline engineering and refrigeration pipe fittings, and can solve the problem of broken pipe wall, which requires lead removal, lead filling again, and lead removal again. The process steps of lead filling are complicated and the process flow is complicated and other issues, to achieve the effects of large-scale application, ease of industrial scale production, and reduction of production costs

Active Publication Date: 2015-12-09
赵肖运
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lead is a heavy metal that is very harmful to the human body and the environment; and the lead filling process steps are relatively complicated, including material cutting, deburring, blowing metal shavings, the first lead filling, the first cleaning of the nozzle, Drilling center hole, hole extrusion, sawing off blind end, grinding, first lead stripping, annealing, second lead filling, second nozzle cleaning, pressing, cutting, second lead stripping, lead removal , expanding or shrinking, polishing, acid and other 20 complicated processing procedures. Among them, because the density of the lead poured in for the first time is squeezed, the density increases. If it is directly pressed, it is easy to break the pipe wall, so It needs to remove lead, fill lead again, and return lead again. It needs to go through two times of lead filling, two lead removal, and two cleaning nozzles. The process is complicated and the efficiency is low.

Method used

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  • A filling medium for extruding pipe-through parts and a manufacturing process of pipe-through parts
  • A filling medium for extruding pipe-through parts and a manufacturing process of pipe-through parts
  • A filling medium for extruding pipe-through parts and a manufacturing process of pipe-through parts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] 100g of calcium nitrate Ca(NO 3 ) 2 4H 2 O, 1800g sodium nitrate NaNO 3 Mix evenly with 100g of water;

[0052] Put the obtained mixture in a heating vessel and heat and melt it at 800°C until the mixture is completely melted to a liquid state, and then use an automatic filling machine to fill the molten mixture into 50 low-carbon tubes with an outer diameter of Φ10mm and a length of 80mm. In the steel pipe, after cooling, place the low-carbon steel pipe filled with the filling medium in a T-shaped die cavity with a cavity of Φ10mm for extrusion molding; then place the extruded pipe fittings in the above-mentioned In the mixture, the filling medium in the pipe fitting is melted by high temperature, and flows out of the pipe fitting after 5 minutes, completing the removal of the filling medium in the pipe fitting, and obtaining a T-shaped tee pipe fitting.

[0053] The structure of T-shaped three-way pipe fittings is as follows: figure 1 As shown, the T-shaped tee p...

Embodiment 2

[0055] 600gCa(NO 3 ) 2 4H 2 O, 2370g sodium nitrate and 30g water are evenly mixed;

[0056] Put the obtained mixture in a heating vessel, heat and melt at 220°C until the mixture is completely melted to a liquid state, and use an automatic filling machine to fill the molten mixture into 100 pieces of aluminum with an outer diameter of Φ8mm and a length of 100mm After cooling, place the aluminum tube filled with filling medium in a Y-shaped tee mold with a cavity of Φ8mm for extrusion molding; then place the extruded pipe fittings in the above-mentioned In the mixture, the filling medium in the pipe-through part is melted by high temperature, and flows out from the pipe-through part after 5 minutes to complete the removal of the filling medium in the pipe-through part. In the process of removing the filling medium, the high temperature plays a role in the pipe-through part Tempering effect: Bending the empty pipe fittings after removing the filling medium on the empty pipe ...

Embodiment 3

[0059] 2000gCa(NO 3 ) 2 , 1600g sodium nitrate and 400g water are evenly mixed;

[0060] Put the obtained mixture in a heating vessel, heat and melt at 100°C until the mixture is completely melted to a liquid state, and use an automatic filling machine to fill the molten mixture into 150 tubes with an outer diameter of Φ9mm and a length of 90mm In the copper tube, after cooling, put the copper tube filled with the filling medium into a mold with a cavity of Φ9mm for extrusion molding; then place the extruded pipe fittings in the above-mentioned mixture after high temperature melting at 450°C, The filling medium in the pipe-through is melted by high temperature, and flows out of the pipe-through after 5 minutes to complete the removal of the filling medium in the pipe-through. In the process of removing the filling medium, the high temperature has a tempering effect on the pipe-through ; Bending the empty pipe fittings after removing the filling medium on the empty pipe bendi...

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Abstract

The invention provides a filling medium for extruding a penetration piece and a manufacturing technique of the penetration piece. The filling medium provided by the invention comprises 5-70 wt% of calcium nitrate, 25-90 wt% of sodium nitrate and 1-10 wt% of water. The filling medium provided by the invention is nontoxic and harmless to the human body and environment. The manufacturing technique of the penetration piece comprises the following steps: heating the filling medium, filling the molten medium into an original tube blank, cooling, extruding the original tube blank, and melting to remove the filling medium to obtain the penetration piece. The filling medium provided by the invention is healthy and environment-friendly, can easily implement industrial large-scale production, and can effectively lower the production cost.

Description

technical field [0001] The invention relates to the technical fields of pipe engineering and refrigeration pipe fittings, in particular to a filling medium for extruding pipe fittings and a manufacturing process for the pipe fittings. Background technique [0002] Pipe fittings are important pipe fittings in pipeline engineering, because they are widely used in the field of pipeline engineering, especially in refrigeration, chemical, construction and food industries. Pipe fittings can be produced through casting, forging, welding and extrusion processes. Cast pipe fittings generally need to be reprocessed and their mechanical properties are poor, so they are gradually eliminated; forged pipe fittings have large machining allowances and high costs. Restricted; although there are many applications of welded pipe fittings, the high-stress area is located at the position of the weld, which is likely to leave hidden dangers of accidents. The above-mentioned cast pipe fittings, f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C37/28B21C37/29
Inventor 赵肖运王超峰王彦坤潘永刚
Owner 赵肖运
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