CN104785728A - Gear casting processing method - Google Patents
Gear casting processing method Download PDFInfo
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- CN104785728A CN104785728A CN201510206530.6A CN201510206530A CN104785728A CN 104785728 A CN104785728 A CN 104785728A CN 201510206530 A CN201510206530 A CN 201510206530A CN 104785728 A CN104785728 A CN 104785728A
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- gear
- casting
- sand
- processing method
- die cavity
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C15/00—Moulding machines characterised by the compacting mechanism; Accessories therefor
- B22C15/23—Compacting by gas pressure or vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gears, Cams (AREA)
Abstract
The invention provides a gear casting processing method. A preparation method comprises the steps as follows: step 1, taking precoated sand, injecting the precoated sand into a valve plate mold cavity, performing heat preservation to enable the precoated sand to be solidified and molded, drawing, and obtaining a precoated sand shell mold; step 2, assembling the precoated sand shell mold and performing vertical clamping, so as to form a casting mold cavity; step 3, taking an iron liquid, then casting the iron liquid into the casting mold cavity, and obtaining a casting; and step 4, taking the casting, cooling the casting, performing shot blasting and finishing, and obtaining a gear. Gear casting belongs to precision casting. The preparation method provided by the invention overcomes a gear expansion phenomenon caused by the traditional manufacturing technique, greatly improves the dimensional precision of the gear by more than 30%, ensures the stability of a metallographic structure of the gear, shortens the production cycle by more than 40%, increases the production efficiency by more than 50%, and reduces the production cost by more than 40%.
Description
Technical field
The invention belongs to casting technology field, particularly relate to a kind of gear casting processing method.
Background technology
Precoated sand is suitable for producing complex precise, requires higher various foundry goods, as automobile engine cylinder-body etc., precoated sand effectively can eliminate the distortion in casting process, the various casting flaw such as hot tearing, and the cast(ing) surface of preparation is brighter and cleaner, and size is more accurate, production cycle can be shortened, save raw metal, reduce production cost, and easily adopt automation in production process, reduce artificial use, coated sand technology is especially applicable to the production in enormous quantities manufacture of various middle-size and small-size foundry goods.
Shell moulded casting utilizes coated sand technology and derivative a kind of novel casting technique, specifically use sand in coating phenolic resin, but not common sand mold, the template of 180-280 degree is formed the shell of suitable thickness, and under normal circumstances, the thickness of shell is 6-12mm, afterwards shell is carried out heating cure, make the Rigidity and strength that shell reaches required, then utilize shell the Composition Modeling chamber, and then produce various foundry goods.Shell mold process excellent effect, the foundry goods clear-cut of casting, any surface finish, size is accurate, the follow-up workload greatly reducing machining.
Chinese invention patent application 201310355164.1 (date of publication 2013.11.20) discloses a kind of method of Iron Mould Coated Sand cylindrical shell cast pistons ring, and its processing step comprises: Making mold, moulding, lower core, mould assembling, cast, unpack, casting cleaning and machined; Describedly be shaped to Iron Mould Coated Sand moulding; The sand layer thickness that covers of described Iron Mould Coated Sand is 6-8mm; The temperature of cast is 1380-1400 DEG C; The time of described cast is 23-28s; Described cast can not need rising head.The piston ring that the present invention produces meets performance requirement, and the dimensional accuracy with foundry goods is high, and allowance is little, and foundry goods yield rate is high, production efficiency advantages of higher.But this patent application does not disclose the concrete technology system of relevant gear casting.
Chinese invention patent application 201410411068.9 (date of publication 2014.11.5) discloses the casting technique of a kind of Sand-Faced Metal Mould Casting spheroidal graphite cast-iron hinge ear, this technique is by design and the hinge on all four master mold of ear shape and swage, then make by penetrating sand mechanism the upper and lower swage die cavity covering sand covering layer of sand with 6-8mm, finally according to charger sheet, the qualified molten iron made is poured in the lumen type after mould assembling, to be cast complete after, unpack and obtain casting hinge ear part.The hinge ear of the more traditional forged steel material of this Sand-Faced Metal Mould Casting technique, production cost can reduce by 35%, plenty of time and the cost such as manpower, equipment are saved, effectively improve production efficiency and castability simultaneously, reduce casting wasted product rate, and this is simple for process, wide market, remarkable in economical benefits, is applicable to most enterprise and uses.But this patent application does not disclose the concrete technology system of relevant gear casting.
Chinese invention patent application 201410544297.8 (date of publication 2015.1.21) discloses a kind of iron die sand casting process, belong to casting technology field; It is high that technical problem to be solved is to provide a kind of casting dimension accuracy, the high and iron die sand casting process that deflection is less of surface smoothness; The technical scheme adopted is: be 1450 DEG C-1600 DEG C by controlling the pouring temperature of molten iron, be less than the duration of pouring 60 seconds and some other process conditions to reduce the stress deformation of foundry goods, adopt the axle housing foundry goods that technical process of the present invention manufactures, surface smoothness, dimensional accuracy is high, and deflection is little.But this patent application does not disclose the concrete technology system of relevant gear casting.
Summary of the invention
Provide hereinafter about brief overview of the present invention, to provide about the basic comprehension in some of the present invention.Should be appreciated that this general introduction is not summarize about exhaustive of the present invention.It is not that intention determines key of the present invention or pith, and nor is it intended to limit the scope of the present invention.Its object is only provide some concept in simplified form, in this, as the preorder in greater detail discussed after a while.
The invention provides a kind of gear casting processing method, its preparation method is made up of following steps:
Step one, gets precoated sand and injects valve plate die cavity, and insulation makes precoated sand curing molding, molding, obtains resin-coated sand shell mould;
Step 2, by resin-coated sand shell mould mould assembly and vertical clamping, forms cast die cavity;
Step 3, gets iron liquid, afterwards by iron liquid casting to cast die cavity in, obtain foundry goods;
Step 4, gets foundry goods, and cooling, ball blast finishing, obtains gear.
Compared with prior art, the present invention has following beneficial effect: gear casting belongs to hot investment casting, usually adopts lost-wax casting, lost foam casting, but it is long all to there is the production cycle, and production efficiency is low, production cost high-technology problem, the intensity of gear does not often reach requirement.Use technology of the present invention, while can ensureing that gear teeth face dimensional accuracy meets the demands, realize the high strength of forming gear.Key of the present invention is selection, the mode of cast and the selection of time of temperature before iron liquid casting.Present invention achieves following technique effect: preparation method of the present invention overcomes the tooth phenomenon that rises that traditional processing technology causes, greatly improve the dimensional accuracy of gear, promote more than 30%, preparation method of the present invention ensure that the stable of gear metallographic structure, production cycle shortens more than 40%, improving productivity more than 50%, production cost reduces by more than 40%.
Detailed description of the invention
Embodiments of the invention are described below.The element described in one embodiment of the invention and feature can combine with the element shown in one or more other embodiment and feature.It should be noted that for purposes of clarity, in explanation, eliminate expression and the description of unrelated to the invention, parts known to persons of ordinary skill in the art and process.
Embodiment 1
The present embodiment relates to a kind of gear casting processing method, and described preparation method is made up of following steps:
Step one, gets precoated sand and injects valve plate die cavity, and insulation makes precoated sand curing molding, molding, obtains resin-coated sand shell mould; Described what inject employing is penetrate sand machine, and the Stress control penetrating sand machine is 0.7Mpa; The temperature of penetrating sand machine controls to be 205 DEG C; Penetrating the number of times that sand machine penetrates sand is 4 times, and the interval time of at every turn penetrating sand is 4 seconds; Before injecting valve plate die cavity, being heated to temperature to valve plate die cavity is 175 DEG C; Described insulation is specially: keep temperature to be 186 DEG C, the time is 15 seconds;
Step 2, by resin-coated sand shell mould mould assembly and vertical clamping, forms cast die cavity;
Step 3, gets iron liquid, afterwards by iron liquid casting to cast die cavity in, obtain foundry goods; The temperature of described iron liquid is 1450 DEG C; Described cast is specially: place cup and pour into a mould, adopt pouring in vertically clamped moulds mode, and the height of casting ladle distance cup is 9cm; The time of described cast is 10 seconds; Be calculated in mass percent, in described iron liquid, carbon≤3.2%, silicon≤1.8%, manganese≤0.3%;
Step 4, gets foundry goods, and cooling, ball blast finishing, obtains cast gear.
The effect of the present embodiment is: overcome the tooth phenomenon that rises that traditional processing technology causes, greatly improve the dimensional accuracy of gear, improve 30%, preparation method of the present invention ensure that the stable of gear metallographic structure, production cycle shortens 40%, improving productivity 50%, production cost reduces by 40%.
Embodiment 2
The present embodiment relates to a kind of gear casting processing method, and described preparation method is made up of following steps:
Step one, gets precoated sand and injects valve plate die cavity, and insulation makes precoated sand curing molding, molding, obtains resin-coated sand shell mould; Described what inject employing is penetrate sand machine, and the Stress control penetrating sand machine is 1.0Mpa; The temperature of penetrating sand machine controls to be 225 DEG C; Penetrating the number of times that sand machine penetrates sand is 4 times, and the interval time of at every turn penetrating sand is 5 seconds; Before injecting valve plate die cavity, being heated to temperature to valve plate die cavity is 185 DEG C; Described insulation is specially: keep temperature to be 195 DEG C, the time is 25 seconds;
Step 2, by resin-coated sand shell mould mould assembly and vertical clamping, forms cast die cavity;
Step 3, gets iron liquid, afterwards by iron liquid casting to cast die cavity in, obtain foundry goods; The temperature of described iron liquid is 1500 DEG C; Described cast is specially: place cup and pour into a mould, adopt pouring in vertically clamped moulds mode, and the height of casting ladle distance cup is 12cm; The time of described cast is 50 seconds; Be calculated in mass percent, in described iron liquid, carbon≤3.2%, silicon≤1.8%, manganese≤0.3%;
Step 4, gets foundry goods, and cooling, ball blast finishing, obtains cast gear.
The effect of the present embodiment is: overcome the tooth phenomenon that rises that traditional processing technology causes, greatly improve the dimensional accuracy of gear, improve 38%, preparation method of the present invention ensure that the stable of gear metallographic structure, production cycle shortens 50, improving productivity 55%, and production cost reduces by 42%.
Embodiment 3
The present embodiment relates to a kind of gear casting processing method, and described preparation method is made up of following steps:
Step one, gets precoated sand and injects valve plate die cavity, and insulation makes precoated sand curing molding, molding, obtains resin-coated sand shell mould; Described what inject employing is penetrate sand machine, and the Stress control penetrating sand machine is 0.8Mpa; The temperature of penetrating sand machine controls to be 220 DEG C; Penetrating the number of times that sand machine penetrates sand is 4 times, and the interval time of at every turn penetrating sand is 4 seconds; Before injecting valve plate die cavity, being heated to temperature to valve plate die cavity is 180 DEG C; Described insulation is specially: keep temperature to be 190 DEG C, the time is 20 seconds;
Step 2, by resin-coated sand shell mould mould assembly and vertical clamping, forms cast die cavity;
Step 3, gets iron liquid, afterwards by iron liquid casting to cast die cavity in, obtain foundry goods; The temperature of described iron liquid is 1480 DEG C; Described cast is specially: place cup and pour into a mould, adopt pouring in vertically clamped moulds mode, and the height of casting ladle distance cup is 11cm; The time of described cast is 33 seconds; Be calculated in mass percent, in described iron liquid, carbon≤3.2%, silicon≤1.8%, manganese≤0.3%;
Step 4, gets foundry goods, and cooling, ball blast finishing, obtains cast gear.
The effect of the present embodiment is: overcome the tooth phenomenon that rises that traditional processing technology causes, greatly improve the dimensional accuracy of gear, promotes 40%, preparation method of the present invention ensure that the stable of gear metallographic structure, production cycle shortens 55%, improving productivity 58%, and production cost reduces by 46%.
In general, preparation method of the present invention is made up of following steps: step one, gets precoated sand and injects valve plate die cavity, and insulation makes precoated sand curing molding, molding, obtains resin-coated sand shell mould; Step 2, by resin-coated sand shell mould mould assembly and vertical clamping, forms cast die cavity; Step 3, gets iron liquid, afterwards by iron liquid casting to cast die cavity in, obtain foundry goods; Step 4, gets foundry goods, and cooling, ball blast finishing, obtains gear.
Preferably, in step one, described in what inject employing is penetrate sand machine, the Stress control penetrating sand machine is 07Mpa-1.0Mpa.As preferably, in step one, the temperature of penetrating sand machine controls as 205-225 DEG C.As preferably, in step one, penetrating the number of times that sand machine penetrates sand is 4 times, and the interval time of at every turn penetrating sand is 4-5 second.As preferably, in step one, before injecting valve plate die cavity, being heated to temperature to valve plate die cavity is 175-185 DEG C.As preferably, in step one, described insulation is specially: maintenance temperature is 186-195 DEG C, and the time is 15-25 second.The treatment process penetrating sand in the present invention has vital effect for the formation of resin-coated sand shell mould, the setting of these parameters and follow-up iron fluid component, heating-up temperature, pouring types etc. have direct impact, all parametric synthesis form a complete technical system, the final technique effect realizing lifting cast gear qualification rate of the present invention.
As preferably, in step 3, the temperature of described iron liquid is 1450-1500 DEG C; Described cast is specially: place cup and pour into a mould, adopt pouring in vertically clamped moulds mode, and the height of casting ladle distance cup is 9-12cm; The time of described cast is 10-50 second.As preferably, in step 3, be calculated in mass percent, in described iron liquid, carbon≤3.2%, silicon≤1.8%, manganese≤0.3%.The selection of iron fluid component has vital effect for the control of temperature, suitable iron fluid component is selected in the present invention, control the temperature of iron liquid, stand-by period before effective shortening cast, reduce the degree of iron liquid by external environment oxidation, control height and the duration of pouring of cast simultaneously, effectively can shorten the duration of pouring further, realize the temperature difference accurately controlling iron liquid, effectively overcome the tooth phenomenon that rises that traditional processing technology causes, greatly improve the dimensional accuracy of gear, ensure that the stable of gear metallographic structure, improve production efficiency and reduce production cost.
In sum, gear casting belongs to hot investment casting, usually adopt lost-wax casting, lost foam casting, but it is long all to there is the production cycle, and production efficiency is low, and production cost high-technology problem, the intensity of gear does not often reach requirement.Use technology of the present invention, while can ensureing that gear teeth face dimensional accuracy meets the demands, realize the high strength of forming gear.Key of the present invention is selection, the mode of cast and the selection of time of temperature before iron liquid casting.Present invention achieves following technique effect: preparation method of the present invention overcomes the tooth phenomenon that rises that traditional processing technology causes, greatly improve the dimensional accuracy of gear, promote more than 30%, preparation method of the present invention ensure that the stable of gear metallographic structure, production cycle shortens more than 40%, improving productivity more than 50%, production cost reduces by more than 40%.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (8)
1. a gear casting processing method, it is characterized in that, described preparation method is made up of following steps:
Step one, gets precoated sand and injects valve plate die cavity, and insulation makes precoated sand curing molding, molding, obtains resin-coated sand shell mould;
Step 2, by resin-coated sand shell mould mould assembly and vertical clamping, forms cast die cavity;
Step 3, gets iron liquid, afterwards by iron liquid casting to cast die cavity in, obtain foundry goods;
Step 4, gets foundry goods, and cooling, ball blast finishing, obtains gear.
2. gear according to claim 1 casting processing method, is characterized in that, in step one, described in what inject employing is penetrate sand machine, the Stress control penetrating sand machine is 07Mpa-1.0Mpa.
3. gear casting processing method according to claim 1, is characterized in that, in step one, the temperature of penetrating sand machine controls as 205-225 DEG C.
4. gear according to claim 1 casting processing method, is characterized in that, in step one, penetrating the number of times that sand machine penetrates sand is 4 times, and the interval time of at every turn penetrating sand is 4-5 second.
5. gear casting processing method according to claim 1, it is characterized in that, in step one, before injecting valve plate die cavity, being heated to temperature to valve plate die cavity is 175-185 DEG C.
6. gear casting processing method according to claim 1, it is characterized in that, in step one, described insulation is specially: maintenance temperature is 186-195 DEG C, and the time is 15-25 second.
7. gear casting processing method according to claim 1, it is characterized in that, in step 3, the temperature of described iron liquid is 1450-1500 DEG C; Described cast is specially: place cup and pour into a mould, adopt pouring in vertically clamped moulds mode, and the height of casting ladle distance cup is 9-12cm; The time of described cast is 10-50 second.
8. gear casting processing method according to claim 1, is characterized in that, in step 3, be calculated in mass percent, in described iron liquid, and carbon≤3.2%, silicon≤1.8%, manganese≤0.3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510206530.6A CN104785728A (en) | 2015-04-27 | 2015-04-27 | Gear casting processing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510206530.6A CN104785728A (en) | 2015-04-27 | 2015-04-27 | Gear casting processing method |
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| CN104785728A true CN104785728A (en) | 2015-07-22 |
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| CN201510206530.6A Pending CN104785728A (en) | 2015-04-27 | 2015-04-27 | Gear casting processing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912113A (en) * | 2015-06-23 | 2015-09-16 | 昌邑中铸铸业有限公司 | Well lid and technological method thereof |
| CN106002114A (en) * | 2016-05-25 | 2016-10-12 | 镇江市经纬工程机械有限公司 | Gear machining method |
| CN107964622A (en) * | 2017-11-27 | 2018-04-27 | 梅州伟友耐磨材料有限公司 | A kind of excavator ductile iron gear of high-ductility high wear-resistant high strength and high hardness and preparation method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08309499A (en) * | 1995-05-19 | 1996-11-26 | Eguchi Diecast Kk | Method and equipment for manufacturing gear |
| CN101249547A (en) * | 2008-03-24 | 2008-08-27 | 山东时风（集团）有限责任公司 | Tooth form part foundry technique method |
| CN102069153A (en) * | 2011-01-30 | 2011-05-25 | 江苏中力齿轮有限公司 | Casting method of thin-wall ductile iron gear blank |
| CN102513503A (en) * | 2011-12-14 | 2012-06-27 | 安徽省辉煌机械制造有限公司 | Iron die sand casting process |
| CN104233293A (en) * | 2014-08-25 | 2014-12-24 | 无锡普瑞腾传动机械有限公司 | Gear surface coating technique |
| CN104289677A (en) * | 2014-10-15 | 2015-01-21 | 山西临汾诚信铸造有限公司 | Iron pattern sand-lined casting process |
-
2015
- 2015-04-27 CN CN201510206530.6A patent/CN104785728A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08309499A (en) * | 1995-05-19 | 1996-11-26 | Eguchi Diecast Kk | Method and equipment for manufacturing gear |
| CN101249547A (en) * | 2008-03-24 | 2008-08-27 | 山东时风（集团）有限责任公司 | Tooth form part foundry technique method |
| CN102069153A (en) * | 2011-01-30 | 2011-05-25 | 江苏中力齿轮有限公司 | Casting method of thin-wall ductile iron gear blank |
| CN102513503A (en) * | 2011-12-14 | 2012-06-27 | 安徽省辉煌机械制造有限公司 | Iron die sand casting process |
| CN104233293A (en) * | 2014-08-25 | 2014-12-24 | 无锡普瑞腾传动机械有限公司 | Gear surface coating technique |
| CN104289677A (en) * | 2014-10-15 | 2015-01-21 | 山西临汾诚信铸造有限公司 | Iron pattern sand-lined casting process |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104912113A (en) * | 2015-06-23 | 2015-09-16 | 昌邑中铸铸业有限公司 | Well lid and technological method thereof |
| CN106002114A (en) * | 2016-05-25 | 2016-10-12 | 镇江市经纬工程机械有限公司 | Gear machining method |
| CN107964622A (en) * | 2017-11-27 | 2018-04-27 | 梅州伟友耐磨材料有限公司 | A kind of excavator ductile iron gear of high-ductility high wear-resistant high strength and high hardness and preparation method thereof |
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Application publication date: 20150722 |