CN101671791A - Pump head production method - Google Patents
Pump head production method Download PDFInfo
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- CN101671791A CN101671791A CN200910152737A CN200910152737A CN101671791A CN 101671791 A CN101671791 A CN 101671791A CN 200910152737 A CN200910152737 A CN 200910152737A CN 200910152737 A CN200910152737 A CN 200910152737A CN 101671791 A CN101671791 A CN 101671791A
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to a pump head production method, comprising the following steps: adding ferrous raw material into a medium-frequency electric furnace; heating the ferrous raw material to be molten into molten iron; carrying out reaction of the molten iron with a nodularizer and an alloy raw material to obtain alloy melt; making an iron mould sand lined die by using cast iron; and injectingthe alloy melt into the iron mould sand lined die. Through long-term study, the inventor makes strict control on the working temperature of the product, alloy pouring temperature and alloy pouring speed as well as retention time of cast parts in casting molds, and makes a breakthrough by adopting the iron mould sand lined die for foundry, thereby solving the technical problems of poor dimensionalprecision and low yield by using wet mould sand manually-made dies for a long term in the field.
Description
Technical field
The present invention relates to a kind of production method, relate in particular to a kind of production method of pump head.
Background technology
Old-fashioned castmethod is adopted in the production of traditional pump head, uses cupola furnace as the raw material melting tank, and casting mould relies on hand moulding, and the cupola furnace combustion fuel not only consumes ample resources, inefficiency, and can produce a large amount of environmental pollutions; The hand moulding of casting mould causes product surface coarse, and precision is not high, particularly the product internal surface; Overall craft produces that speed is slow, and yield rate is low, causes product cost higher.
Summary of the invention
The purpose of this invention is to provide a kind of yield rate height, product surface is meticulous, the pump head production method that production efficiency is high.
Above-mentioned technical purpose of the present invention is achieved by the following technical programs:
A kind of production method of pump head, it comprises following production stage successively:
(1) after joining ferruginous starting material in the middle frequency furnace, described ferruginous starting material is heated, make described ferruginous starting material be fused into molten iron;
(2) nodulizing agent and alloy raw material are put into hot metal ladle;
(3) will pour in the described hot metal ladle of step (2) through the molten iron that step (1) obtains, described molten iron and described nodulizing agent and alloy raw material are reacted, get the alloy liquation;
(4) treat that the described reaction of step (3) is finished after, will float on the rubbish of the described alloy molten surface of step (3) and residue and remove, obtain clean alloy liquation;
(5) cylinder iron make the swage mould, in the swage die hole, spread resin sand, described resin sand is fixed, can make the multiple sand mo(u)ld tool work in-process of swage with swage; Then the multiple sand mo(u)ld tool work in-process of described swage are put into process furnace and heat, make resin sand typing back take out described swage, make the multiple sand mo(u)ld tool of swage;
(6) use sand core machine that resin sand is made the resin sand loam core, and packed in the multiple sand mo(u)ld tool of the swage that step (5) makes in described resin sand loam core;
(7) will inject the multiple sand mo(u)ld tool of described swage through the clean alloy liquation that step (4) make, form pump head foundry goods work in-process behind the clean alloy liquation cooling forming of described injection, remove the resin sand that is bonded in described foundry goods surface of semi-finished then, make the pump head foundry goods.
Product pump head foundry goods of the present invention, the parts for pump shell are tubbiness; The described middle frequency furnace of step (1) uses electric energy to heat ferruginous starting material and makes ferruginous starting material fusing; The pouring practice before casting of the described foundry ladle of step (2) holds molten iron, has driving to carry, and is made by refractory mortar.
The shape of pump head of the present invention is comparatively simple, but the sealing requirements of later stage product makes pump head dimension precision requirement of the present invention higher, and the contriver has adopted the multiple sand mo(u)ld tool casting of swage pump head breakthroughly; The multiple sand mo(u)ld tool casting of described swage claims diecasting again, and it is that liquid metal is poured into the cast iron casting type, to obtain a kind of castmethod of foundry goods; Compare with traditional tide mould sand molding, the multiple sand of swage has product mechanical property height, precision and surface smoothness are good, quality and dimensional stabilizing, technology recovery rate height, raw materials consumption is few, save advantages such as molding material, the while also exists airtight, and does not have deformability, easily cause product to wash deficiency, the rimose defective, through long-felt, to the working temperature of product, the time that the teeming temperature of alloy and pouring speed, foundry goods stop in casting mold is carried out strictness control, solve this area life-time service tide mould sand and made the poor dimensional precision of mould, the technical problem that yield rate is low by hand.
As preferably: ferruginous starting material comprise the pig iron, steel scrap, foundry returns, ferrosilicon and ferromanganese.
As preferably: ferruginous starting material heat fused temperature is 1450～1500 degrees centigrade described in the step (1), be lower than described temperature, then ferruginous starting material can't melt, be higher than described temperature, then waste fuel, increase cost, simultaneously, based on the multiple fast characteristics of sand mo(u)ld tool heat conduction of swage, too high or too low temperature all can cause the product that can't cast or cast out to produce damage, bubble and cause waste product.
As preferably: the described alloy raw material of step (2) comprises copper and magnesium, copper is as the alloying constituent of alloy raw material adjustable product, with physical propertys such as the intensity that promotes product, durabilitys, magnesium is the alloying constituent of adjustable product both, with physical propertys such as the intensity that promotes product, durabilitys, again as the catalyzer of spheroidizing reacion.
As preferably: the reaction times of the described nodulizing agent of step (3) and alloy raw material and described molten iron is 70～100 seconds, so that spheroidizing reacion fully carries out, can't too shortly induce reaction not enough or oversize inducing reaction excessively of described time because of the described time.
As preferably: the temperature that the multiple sand mo(u)ld tool work in-process heating of swage described in the step (5) needs is 200～300 degrees centigrade, heating was held time 70～100 seconds, temperature is crossed low or is held time too short, the capital makes resin sand fixing insufficient, and insufficient strength causes the final product dimensional precision not high, the surface is not meticulous, and temperature is too high or hold time longly, can cause that then resin sand damages, and the multiple sand mo(u)ld tool of last swage can't be made.
As preferably: the thickness of spreading resin sand described in the step (5) is 4～8 millimeters, the deflation resistance in the time of suitably reducing the product cooling.
In sum, the present invention has following beneficial effect:
1, the resin sand loam core adopts sand core machine to make, any surface finish, so product surface is meticulous, roughness is good;
2, the multiple sand handicraft product dimensional precision height of swage, the surface is meticulous, so the scrap rate of product is low, and the yield rate height is saved the products production cost, and the quantity of doing over again simultaneously reduces, and production efficiency improves;
3, adopt middle frequency furnace production,, compare with cupola furnace in the former technology, have the melting efficiency height, quick heating, easy control of temperature, save energy, metal ingredient is even, and the advantage that labour intensity is little further reduces cost, and reduces simultaneously to produce and pollutes.
Description of drawings
Fig. 1 is the inner loam core of the multiple sand mo(u)ld tool of a swage of the present invention vertical view;
Fig. 2 is the inner loam core of the multiple sand mo(u)ld tool of a swage of the present invention front view;
Fig. 3 is the inner loam core of the multiple sand mo(u)ld tool of a swage of the present invention left view;
Fig. 4 is the inner loam core of the multiple sand mo(u)ld tool of a swage of the present invention upward view;
Fig. 5 is the multiple sand mo(u)ld tool front view of swage of the present invention.
Embodiment
Embodiment one:
A kind of production method of pump head, it comprises following production stage successively:
(1) after joining ferruginous starting material in the middle frequency furnace, described ferruginous starting material are heated, make described ferruginous starting material be fused into molten iron, ferruginous starting material comprise the pig iron, steel scrap, foundry returns, ferrosilicon and ferromanganese, the pig iron is the iron-carbon of carbon content between 2%～4.3%, the various steel of steel scrap for reclaiming, and foundry returns is substandard products, the waste product of producing, ferrosilicon and ferromanganese are respectively the iron alloys that contains silicon and manganese, in order to the content of silicon and manganese in the adjusting product;
(2) nodulizing agent and alloy raw material are put into hot metal ladle, nodulizing agent ReMg3-8, alloy raw material are copper and magnesium, and magnesium also has spheroidization simultaneously;
(3) will pour in the described hot metal ladle of step (2) through the molten iron that step (1) obtains, described molten iron and described nodulizing agent and alloy raw material are reacted,, just can obtain the alloy liquation through 70～100 seconds reaction times;
(4) treat that the described reaction of step (3) is finished after, will float on the rubbish of the described alloy molten surface of step (3) and residue and remove, obtain clean alloy liquation;
(5) be processed into the swage unidimensional with iron block, cylinder iron make the swage mould, in the swage die hole, spread the resin sand of 4～8 mm thick, described resin sand is fixed, can make the multiple sand mo(u)ld tool work in-process of swage with swage with finished product; Then the multiple sand mo(u)ld tool work in-process of described swage are put into process furnace and be heated to 200 degrees centigrade, kept 70 seconds, make the resin sand typing, take out described swage then, make as the multiple sand mo(u)ld tool of the swage of Fig. 5;
(6) use sand core machine that resin sand is made the resin sand loam core,, and described resin sand loam core packed in the multiple sand mo(u)ld tool of the swage that step (5) makes as Fig. 1, Fig. 2, Fig. 3, shown in Figure 4;
(7) will inject the multiple sand mo(u)ld tool of described swage through the clean alloy liquation that step (4) make, form pump head foundry goods work in-process behind the clean alloy liquation cooling forming of described injection, remove the resin sand that is bonded in described foundry goods surface of semi-finished then, make the pump head foundry goods.
Embodiment two:
A kind of production method of pump head, it comprises following production stage successively:
(1) after joining ferruginous starting material in the middle frequency furnace, described ferruginous starting material are heated, make described ferruginous starting material be fused into molten iron, ferruginous starting material comprise the pig iron, steel scrap, foundry returns, ferrosilicon and ferromanganese, the pig iron is the iron-carbon of carbon content between 2%～4.3%, the various steel of steel scrap for reclaiming, and foundry returns is substandard products, the waste product of producing, ferrosilicon and ferromanganese are respectively the iron alloys that contains silicon and manganese, in order to the content of silicon and manganese in the adjusting product;
(2) nodulizing agent and alloy raw material are put into hot metal ladle, nodulizing agent ReMg3-8, alloy raw material are copper and magnesium, and magnesium also has spheroidization simultaneously;
(3) will pour in the described hot metal ladle of step (2) through the molten iron that step (1) obtains, described molten iron and described nodulizing agent and alloy raw material are reacted,, just can obtain the alloy liquation through 70～100 seconds reaction times;
(4) treat that the described reaction of step (3) is finished after, will float on the rubbish of the described alloy molten surface of step (3) and residue and remove, obtain clean alloy liquation;
(5) be processed into the swage unidimensional with iron block, cylinder iron make the swage mould, in the swage die hole, spread the resin sand of 4～8 mm thick, described resin sand is fixed, can make the multiple sand mo(u)ld tool work in-process of swage with swage with finished product; Then the multiple sand mo(u)ld tool work in-process of described swage are put into process furnace and be heated to 300 degrees centigrade degrees centigrade, kept 70 seconds, make the resin sand typing, take out described swage then, make as the multiple sand mo(u)ld tool of the swage of Fig. 5;
(6) use sand core machine that resin sand is made the resin sand loam core,, and described resin sand loam core packed in the multiple sand mo(u)ld tool of the swage that step (5) makes as Fig. 1, Fig. 2, Fig. 3, shown in Figure 4;
(7) will inject the multiple sand mo(u)ld tool of described swage through the clean alloy liquation that step (4) make, form pump head foundry goods work in-process behind the clean alloy liquation cooling forming of described injection, remove the resin sand that is bonded in described foundry goods surface of semi-finished then, make the pump head foundry goods.
Embodiment three:
A kind of production method of pump head, it comprises following production stage successively:
(1) after joining ferruginous starting material in the middle frequency furnace, described ferruginous starting material are heated, make described ferruginous starting material be fused into molten iron, ferruginous starting material comprise the pig iron, steel scrap, foundry returns, ferrosilicon and ferromanganese, the pig iron is the iron-carbon of carbon content between 2%～4.3%, the various steel of steel scrap for reclaiming, and foundry returns is substandard products, the waste product of producing, ferrosilicon and ferromanganese are respectively the iron alloys that contains silicon and manganese, in order to the content of silicon and manganese in the adjusting product;
(2) nodulizing agent and alloy raw material are put into hot metal ladle, nodulizing agent ReMg3-8, alloy raw material are copper and magnesium, and magnesium also has spheroidization simultaneously;
(3) will pour in the described hot metal ladle of step (2) through the molten iron that step (1) obtains, described molten iron and described nodulizing agent and alloy raw material are reacted,, just can obtain the alloy liquation through 70～100 seconds reaction times;
(4) treat that the described reaction of step (3) is finished after, will float on the rubbish of the described alloy molten surface of step (3) and residue and remove, obtain clean alloy liquation;
(5) be processed into the swage unidimensional with iron block, cylinder iron make the swage mould, in the swage die hole, spread the resin sand of 4～8 mm thick, described resin sand is fixed, can make the multiple sand mo(u)ld tool work in-process of swage with swage with finished product; Then the multiple sand mo(u)ld tool work in-process of described swage are put into process furnace and be heated to 200 degrees centigrade degrees centigrade, kept 100 seconds, make the resin sand typing, take out described swage then, make as the multiple sand mo(u)ld tool of the swage of Fig. 5;
(6) use sand core machine that resin sand is made the resin sand loam core,, and described resin sand loam core packed in the multiple sand mo(u)ld tool of the swage that step (5) makes as Fig. 1, Fig. 2, Fig. 3, shown in Figure 4;
(7) will inject the multiple sand mo(u)ld tool of described swage through the clean alloy liquation that step (4) make, form pump head foundry goods work in-process behind the clean alloy liquation cooling forming of described injection, remove the resin sand that is bonded in described foundry goods surface of semi-finished then, make the pump head foundry goods.
Embodiment four:
A kind of production method of pump head, it comprises following production stage successively:
(1) after joining ferruginous starting material in the middle frequency furnace, described ferruginous starting material are heated, make described ferruginous starting material be fused into molten iron, ferruginous starting material comprise the pig iron, steel scrap, foundry returns, ferrosilicon and ferromanganese, the pig iron is the iron-carbon of carbon content between 2%～4.3%, the various steel of steel scrap for reclaiming, and foundry returns is substandard products, the waste product of producing, ferrosilicon and ferromanganese are respectively the iron alloys that contains silicon and manganese, in order to the content of silicon and manganese in the adjusting product;
(2) nodulizing agent and alloy raw material are put into hot metal ladle, nodulizing agent ReMg3-8, alloy raw material are copper and magnesium, and magnesium also has spheroidization simultaneously;
(3) will pour in the described hot metal ladle of step (2) through the molten iron that step (1) obtains, described molten iron and described nodulizing agent and alloy raw material are reacted,, just can obtain the alloy liquation through 70～100 seconds reaction times;
(4) treat that the described reaction of step (3) is finished after, will float on the rubbish of the described alloy molten surface of step (3) and residue and remove, obtain clean alloy liquation;
(5) be processed into the swage unidimensional with finished product with iron block, cylinder iron make the swage mould, usefulness is penetrated the resin sand that sand technology is answered 4～8 mm thick in the swage die hole, with swage described resin sand is fixed, and can make the multiple sand mo(u)ld tool work in-process of swage; Then the multiple sand mo(u)ld tool work in-process of described swage are put into process furnace and be heated to 300 degrees centigrade degrees centigrade, kept 100 seconds, make the resin sand typing, take out described swage then, make as the multiple sand mo(u)ld tool of the swage of Fig. 5;
(6) use sand core machine that resin sand is made the resin sand loam core,, and described resin sand loam core packed in the multiple sand mo(u)ld tool of the swage that step (5) makes as Fig. 1, Fig. 2, Fig. 3, shown in Figure 4;
(7) will inject the multiple sand mo(u)ld tool of described swage through the clean alloy liquation that step (4) make, form pump head foundry goods work in-process behind the clean alloy liquation cooling forming of described injection, remove the resin sand that is bonded in described foundry goods surface of semi-finished then, make the pump head foundry goods.
This technology is compared with traditional tide mould sand mould, and product tensile strength on average can improve 25 %, yield strength on average improves 20%, and its etch resistant properties and hardness also significantly improve, former material The material consumption reduces, and can save 15～30%, can save Modeling Material 80% simultaneously; Mould is adopted Make with iron, can Reusability repeatedly, save in a large number cost; Multiple layer of sand has been regulated effectively The cooling velocity of product makes product not go out spoken parts in traditional operas on the one hand, makes again on the other hand cooling rate greater than sand Mold casting. Swage does not have collapsibility, but very thin multiple sand can suitably reduce the deflation resistance of product. Swage has good rigidity in addition, effectively limits the Graphite Particles in Spheroidal Graphite Cast Iron expansion, has realized not having and has emitted The mouth casting is eliminated and is loosened, and has improved the density of foundry goods.
Claims (7)
1, a kind of production method of pump head is characterized in that: it comprises following production stage successively:
(1) after joining ferruginous starting material in the middle frequency furnace, described ferruginous starting material is heated, make described ferruginous starting material be fused into molten iron;
(2) nodulizing agent and alloy raw material are put into hot metal ladle;
(3) will pour in the described hot metal ladle of step (2) through the molten iron that step (1) obtains, described molten iron and described nodulizing agent and alloy raw material are reacted, obtain the alloy liquation;
(4) treat that the described reaction of step (3) is finished after, will float on the rubbish of the described alloy molten surface of step (3) and residue and remove, obtain clean alloy liquation;
(5) cylinder iron make the swage mould, in the swage die hole, spread resin sand, described resin sand is fixed, can make the multiple sand mo(u)ld tool work in-process of swage with swage; Then the multiple sand mo(u)ld tool work in-process of described swage are put into process furnace and heat, make resin sand typing back take out described swage, make the multiple sand mo(u)ld tool of swage;
(6) use sand core machine that resin sand is made the resin sand loam core, and packed in the multiple sand mo(u)ld tool of the swage that step (5) makes in described resin sand loam core;
(7) will inject the multiple sand mo(u)ld tool of described swage through the clean alloy liquation that step (4) make, form pump head foundry goods work in-process behind the clean alloy liquation cooling forming of described injection, remove the resin sand that is bonded in described foundry goods surface of semi-finished then, make the pump head foundry goods.
2, according to the production method of the described motor body of claim 1, it is characterized in that: ferruginous starting material comprise the pig iron, steel scrap, foundry returns, ferrosilicon and ferromanganese.
3, according to the production method of the described pump head of claim 1, it is characterized in that: ferruginous starting material heat fused temperature is 1450～1500 degrees centigrade described in the step (1).
4, according to the production method of the described pump head of claim 1, it is characterized in that: the described alloy raw material of step (2) comprises copper and magnesium.
5, according to the production method of the described pump head of claim 1, it is characterized in that: the reaction times of the described nodulizing agent of step (3) and alloy raw material and described molten iron is 70～100 seconds.
6, according to the production method of the described pump head of claim 1, it is characterized in that: the temperature of the multiple sand mo(u)ld tool work in-process heating of swage described in the step (5) needs is 200～300 degrees centigrade, and heating was held time 70～100 seconds.
7, according to the production method of the described pump head of claim 1, it is characterized in that: the thickness of spreading resin sand described in the step (5) is 4～8 millimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910152737A CN101671791A (en) | 2009-09-27 | 2009-09-27 | Pump head production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910152737A CN101671791A (en) | 2009-09-27 | 2009-09-27 | Pump head production method |
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| CN101671791A true CN101671791A (en) | 2010-03-17 |
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| CN200910152737A Pending CN101671791A (en) | 2009-09-27 | 2009-09-27 | Pump head production method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105081225A (en) * | 2015-08-28 | 2015-11-25 | 台州日井泵业有限公司 | Assembly method of runner insert in water pump head |
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| JPH07116775A (en) * | 1993-08-31 | 1995-05-09 | Hitachi Ltd | Mold for casting metallic mold and manufacture thereof and casting method using it |
| CN101380665A (en) * | 2007-09-03 | 2009-03-11 | 中国国际海运集装箱(集团)股份有限公司 | Wheel hub casting method and die thereof |
| CN101418414A (en) * | 2008-12-11 | 2009-04-29 | 南车戚墅堰机车有限公司 | QT600-3 iron casting and manufacture method thereof |
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2009
- 2009-09-27 CN CN200910152737A patent/CN101671791A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07116775A (en) * | 1993-08-31 | 1995-05-09 | Hitachi Ltd | Mold for casting metallic mold and manufacture thereof and casting method using it |
| CN101380665A (en) * | 2007-09-03 | 2009-03-11 | 中国国际海运集装箱(集团)股份有限公司 | Wheel hub casting method and die thereof |
| CN101418414A (en) * | 2008-12-11 | 2009-04-29 | 南车戚墅堰机车有限公司 | QT600-3 iron casting and manufacture method thereof |
Non-Patent Citations (1)
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| 司乃钧等: "《热加工工艺基础》", 30 April 2002 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105081225A (en) * | 2015-08-28 | 2015-11-25 | 台州日井泵业有限公司 | Assembly method of runner insert in water pump head |
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Application publication date: 20100317 |