CN104907500A - Nut casting processing method - Google Patents
Nut casting processing method Download PDFInfo
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- CN104907500A CN104907500A CN201510206167.8A CN201510206167A CN104907500A CN 104907500 A CN104907500 A CN 104907500A CN 201510206167 A CN201510206167 A CN 201510206167A CN 104907500 A CN104907500 A CN 104907500A
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Abstract
The present invention provides a nut casting processing method, the preparation method is composed of the following steps: step 1, taking precoated sand to be injected into a valve plate die cavity, preserving heat for curing and molding of the precoated sand, stripping the die to obtain precoated sand shell molds; step 2, combining the precoated sand shell molds and vertically clamping to form a casting cavity; step 3, taking molten iron, pouring the molten iron into the casting cavity toobtain a casting; and step 4, taking the casting, cooling, blasting, and finishing to obtain a nut. The method effectively solves the technical problems of low dimensional precision, low qualified rate and low efficiency of production of the nut casting production process in the prior art, and by use of the method, the cast nut internal thread can be moulded in one time, production efficiency is improved by more than one time, and the product qualified rate is increased by more than 30%.
Description
Technical field
The invention belongs to casting technology field, particularly relate to a kind of nut 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 nut 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 nut casting.
Chinese invention patent application 201410544297.8 (date of publication 2015.1.21) discloses a kind of iron die sand casting process, belongs 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 nut 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 nut 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 nut.
Compared with prior art, the present invention has following beneficial effect: the production method of casting nut traditional is by the cast molding of clay damp sand, the dimensional accuracy of product is low, percent defective is high, efficiency is low, the internal thread of portioned product also can be caused to lack, could must be realized by follow-up machining, cause production cost to remain high.It is low that method of the present invention efficiently solves the dimensional accuracy existed in casting nut production technology, and qualification rate is low, the technical problem that production efficiency is low.Present invention achieves following technique effect: method of the present invention, make the internal thread disposal molding casting nut, production efficiency is enhanced about more than once, and product percent of pass improves more than 30%.
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 nut 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 casting nut.
The effect of the present embodiment is: it is low that method of the present invention efficiently solves the dimensional accuracy existed in casting nut production technology, and qualification rate is low, the technical problem that production efficiency is low.Method of the present invention, make the internal thread disposal molding casting nut, production efficiency is enhanced about more than once, and product percent of pass improves 35%.
Embodiment 2
The present embodiment relates to a kind of nut 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 casting nut.
The effect of the present embodiment is: it is low that method of the present invention efficiently solves the dimensional accuracy existed in casting nut production technology, and qualification rate is low, the technical problem that production efficiency is low.Method of the present invention, make the internal thread disposal molding casting nut, production efficiency is enhanced about more than once, and product percent of pass improves 40%.
Embodiment 3
The present embodiment relates to a kind of nut 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 casting nut.
The effect of the present embodiment is: it is low that method of the present invention efficiently solves the dimensional accuracy existed in casting nut production technology, and qualification rate is low, the technical problem that production efficiency is low.Method of the present invention, make the internal thread disposal molding casting nut, production efficiency is enhanced about more than once, and product percent of pass improves 50%.
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 nut.
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, and final realization promotes the technique effect that the present invention casts nut qualification rate.
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, efficiently solve the dimensional accuracy existed in casting nut production technology low, qualification rate is low, the technical problem that production efficiency is low, make the internal thread disposal molding casting nut, enhance productivity and product percent of pass.
In sum, the production method of casting nut traditional is that the dimensional accuracy of product is low by the cast molding of clay damp sand, percent defective is high, and efficiency is low, and the internal thread of portioned product also can be caused to lack, must could be realized by follow-up machining, cause production cost to remain high.It is low that method of the present invention efficiently solves the dimensional accuracy existed in casting nut production technology, and qualification rate is low, the technical problem that production efficiency is low.Present invention achieves following technique effect: method of the present invention, make the internal thread disposal molding casting nut, production efficiency is enhanced about more than once, and product percent of pass improves more than 30%.
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 nut 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 nut.
2. nut 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. nut 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. nut 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. nut 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. nut 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. nut 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. nut 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 |
|---|---|---|---|
| CN201510206167.8A CN104907500A (en) | 2015-04-27 | 2015-04-27 | Nut casting processing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510206167.8A CN104907500A (en) | 2015-04-27 | 2015-04-27 | Nut casting processing method |
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| CN104907500A true CN104907500A (en) | 2015-09-16 |
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| CN201510206167.8A Pending CN104907500A (en) | 2015-04-27 | 2015-04-27 | Nut casting processing method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105234349A (en) * | 2015-10-13 | 2016-01-13 | 繁昌县金科机电科技有限公司 | Nut casting die |
| CN105964909A (en) * | 2016-06-15 | 2016-09-28 | 安徽省含山县林头振皖铸造厂 | Cold-core box precoated sand casting technology of motor pedestal |
| CN105964908A (en) * | 2016-06-15 | 2016-09-28 | 安徽省含山县林头振皖铸造厂 | Cold-core box precoated sand casting technology of rivet plate for bridge |
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| CN2637037Y (en) * | 2003-08-05 | 2004-09-01 | 安徽省宁国市耐磨材料总厂 | Stacked box series casting intermediate covering sand type mould |
| CN1951596A (en) * | 2006-11-20 | 2007-04-25 | 包正权 | Hot precoated sand stack casting process |
| 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 |
| CN103143675A (en) * | 2013-01-31 | 2013-06-12 | 洛阳新火种节能技术推广有限公司 | Process for casting ball iron flywheel by iron model sand covering |
| CN104190866A (en) * | 2014-08-18 | 2014-12-10 | 宁国市四方钢球模具设备有限公司 | Sand coating manufacturing method for double-metal alloy hammer |
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2015
- 2015-04-27 CN CN201510206167.8A patent/CN104907500A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2637037Y (en) * | 2003-08-05 | 2004-09-01 | 安徽省宁国市耐磨材料总厂 | Stacked box series casting intermediate covering sand type mould |
| CN1951596A (en) * | 2006-11-20 | 2007-04-25 | 包正权 | Hot precoated sand stack casting process |
| 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 |
| CN103143675A (en) * | 2013-01-31 | 2013-06-12 | 洛阳新火种节能技术推广有限公司 | Process for casting ball iron flywheel by iron model sand covering |
| CN104190866A (en) * | 2014-08-18 | 2014-12-10 | 宁国市四方钢球模具设备有限公司 | Sand coating manufacturing method for double-metal alloy hammer |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105234349A (en) * | 2015-10-13 | 2016-01-13 | 繁昌县金科机电科技有限公司 | Nut casting die |
| CN105964909A (en) * | 2016-06-15 | 2016-09-28 | 安徽省含山县林头振皖铸造厂 | Cold-core box precoated sand casting technology of motor pedestal |
| CN105964908A (en) * | 2016-06-15 | 2016-09-28 | 安徽省含山县林头振皖铸造厂 | Cold-core box precoated sand casting technology of rivet plate for bridge |
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Application publication date: 20150916 |