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Casting technology of pump body castings

A casting and process technology, applied in the field of casting process of pump body castings, can solve the problems of low casting quality, inclusions, time-consuming and labor-intensive, etc., and achieve the effect of improving production efficiency, good casting quality, and avoiding failure.

Inactive Publication Date: 2019-01-01
马鞍山力搏机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the castings are prone to porosity and inclusions during casting, resulting in low casting quality; and for castings with complex pump body shapes, it is easy to fail in molding, which is time-consuming and laborious. Therefore, we propose a casting process for pump body castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The invention discloses a casting process of a pump body casting, and its specific process method is as follows:

[0016] (1) Process the lost foam mold according to the size of the casting, and then bury the lost mold in the molding sand box for molding. The molding sand consists of 65% old sand, 18% new sand, 5% adhesive, 4% water and coal powder 4% composition;

[0017] (2) Negative pressure treatment is carried out on the molding sand box, and the air in the mold cavity is discharged under the action of the negative pressure pump, and the pressure of the negative pressure pumping is controlled at 0.04Mpa;

[0018] (3) Put 2.2% of manganese, 1.3% of silicon, 0.6% of phosphorus, 0.5% of sulfur, 2.4% of chromium, 0.15% of titanium, 1.4% of boron into the melting furnace, and the balance is iron, and melt to obtain alloy solution;

[0019] (4) The obtained alloy solution is poured into the mold through the gate, then cooled naturally, and the mold is opened to take out...

Embodiment 2

[0021] The invention discloses a casting process of a pump body casting, and its specific process method is as follows:

[0022] (1) Process the lost foam mold according to the size of the casting, and then bury the lost mold in the molding sand box for molding. The molding sand consists of 70% old sand, 14% new sand, 6% adhesive, 5% coal powder, water 5% composition;

[0023] (2) Negative pressure treatment is carried out on the molding sand box, and the air in the mold cavity is discharged under the action of the negative pressure pump, and the pressure of the negative pressure pumping is controlled at 0.05Mpa;

[0024] (3) Put 2.4% of manganese, 1.3-1.7% of silicon, 0.8% of phosphorus, 0.7% of sulfur, 2.6% of chromium, 0.18% of titanium, 1.6% of boron into the melting furnace, and the balance is iron, and melt to obtain alloy solution ;

[0025] (4) The obtained alloy solution is poured into the mold through the gate, then cooled naturally, and the mold is opened to take ...

Embodiment 3

[0027] The invention discloses a casting process of a pump body casting, and its specific process method is as follows:

[0028] (1) Process the lost foam mold according to the size of the casting, and then bury the lost mold in the molding sand box for molding. The molding sand consists of 85% old sand, 10% new sand, 7% adhesive, 6% water and coal powder 6% composition;

[0029] (2) Negative pressure treatment is carried out on the molding sand box, and the air in the mold cavity is discharged under the action of the negative pressure pump, and the pressure of the negative pressure pumping is controlled at 0.06Mpa;

[0030] (3) 2.6% of manganese, 1.7% of silicon, 1.0% of phosphorus, 0.9% of sulfur, 2.8% of chromium, 0.21% of titanium, 1.8% of boron are put into the melting furnace, and the balance is iron, and the alloy solution is obtained by melting;

[0031] (4) The obtained alloy solution is poured into the mold through the gate, then cooled naturally, and the mold is op...

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PUM

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Abstract

The invention discloses a casting technology of pump body castings. The casting technology comprises following steps: a lost foam mould is prepared based on the size of a casting, and the lost foam mould is buried in foundry sand box for moulding, wherein the foundry sand is composed of old sand, new sand, an adhesive, water, and coal dust; the foundry sand box is subjected to negative pressure treatment, and the air in the mould chamber is pumped out using a negative pressure pump; 2.2 to 2.6% of manganese, 1.3 to 1.7% of silicon, 0.6 to 1.0% of phosphor, 0.5 to 0.9% of sulfur, 2.4 to 2.8% ofchromium, 0.15 to 0.21% of titanium, 1.4 to 1.8% of boron, and the balance iron are introduced into a smelting furnace, fusion is carried out so as to obtain an alloy solution; the alloy solution isintroduced into the lost foam mould through a casting gate, natural cooling is carried out, and then the lost foam mould is opened to take an obtained casting out from the lost foam mould. In production, no foam or impurity is generated in the casting, the casting quality is excellent, the casting technology can be used for casting of complex pump body castings, complex casting failure is prevented, cost is reduced, and production efficiency is increased.

Description

technical field [0001] The invention relates to the technical field of pump body casting production, in particular to a casting process for pump body castings. Background technique [0002] Casting generally does not apply pressure, does not require high strength of equipment and molds, has small restrictions on product size, and low internal stress in products. Castings have comprehensive properties such as wear resistance, corrosion resistance, and shock absorption, which cannot be achieved by other metal forming methods such as forging, rolling, welding, and punching. However, the castings are prone to porosity and inclusions during casting, resulting in low casting quality; and for castings with complex pump body shapes, it is easy to fail in molding, which is time-consuming and laborious. Therefore, we propose a casting process for pump body castings. Contents of the invention [0003] In order to solve the defects of the prior art solutions, the invention discloses ...

Claims

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Application Information

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IPC IPC(8): B22C9/22B22C9/04C22C38/38C22C38/02C22C38/34C22C38/32C22C38/60C22C38/28
CPCB22C9/04B22C9/22C22C38/002C22C38/02C22C38/28C22C38/32C22C38/34C22C38/38C22C38/60
Inventor 濮义勇
Owner 马鞍山力搏机械制造有限公司
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