CN109909454A - Nut casts processing method - Google Patents
Nut casts processing method Download PDFInfo
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- CN109909454A CN109909454A CN201711313755.7A CN201711313755A CN109909454A CN 109909454 A CN109909454 A CN 109909454A CN 201711313755 A CN201711313755 A CN 201711313755A CN 109909454 A CN109909454 A CN 109909454A
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Abstract
The present invention relates to a kind of nuts to cast processing method, and the preparation method is made of following steps: step 1 takes precoated sand to inject valve plate die cavity, keeps the temperature so that precoated sand curing molding, molding obtain resin-coated sand shell mould；Resin-coated sand shell mould mould assembly and vertical clamping are formed casting type chamber by step 2；Step 3 takes iron liquid, and iron liquid casting is obtained casting into casting type chamber later；Step 4 takes casting, and cooling, ball blast finishing is to get nut.The invention enables the internal screw thread disposal molding of casting nut, production efficiency is enhanced about more than once, and product qualification rate improves 30% or more.
Description
The invention belongs to casting technology fields more particularly to a kind of nut to cast processing method for technical field.
Background technique
Precoated sand is suitable for production complex precise, it is desirable that higher various casting, such as automobile engine cylinder-body, overlay film
Sand can effectively eliminate the deformation in casting process, the various casting flaws such as hot tearing, and the cast(ing) surface prepared is brighter and cleaner, ruler
It is very little more accurate, the production cycle can be shortened, save raw metal, reduce production cost, and easily use automation in production process,
Artificial use is reduced, coated sand technology is especially suitable for the mass production manufacture of various small and medium-sized castings.Shell moulded casting is benefit
The novel casting technique of derivative one kind with coated sand technology specifically uses sand in coating phenolic resin, and non-generic
Sand mold, in the template of 180-280 degree formed suitable thickness shell, it is generally the case that shell with a thickness of 6-12mm, later
Shell is subjected to heating cure, shell is made to reach required stiffness and strength, then constitutes moulding chamber, Jin Ersheng using shell
Produce various casting.The casting of shell mold process excellent effect, casting is clear-cut, any surface finish, accurate size, it is subsequent significantly
Reduce the workload of machining.
Chinese invention patent application 201410411068.9 (date of publication 2014.11.5) discloses a kind of Sand-Faced Metal Mould Casting
Spheroidal graphite cast-iron cuts with scissors the casting technique of ear, then the technique master mold and swage completely the same with hinge ear shape by design lead to
It crosses penetrating sand machine and produces and cover the swage type chamber of sand above and below with 6-8mm sand layer, finally according to charger sheet by manufactured qualification
In lumen type after molten iron casting to mould assembling, after the completion of to be cast, unpack and obtain casting hinge ear part.The Sand-Faced Metal Mould Casting technique
The hinge ear of more traditional forged steel material, production cost can reduce by 35%, save the costs such as plenty of time and manpower, equipment, simultaneously
Production efficiency and castability are effectively increased, reduces rate of wasted casting product, and this is simple for process, wide market,
Remarkable in economical benefits is suitble to overwhelming majority enterprise to use.But the patent application does not disclose the concrete technology of related nut casting
System.
Chinese invention patent application 201410544297.8 (date of publication 2015.1.21) discloses a kind of device for sand coated iron mould casting
Technique belongs to casting technology field；The technical problem to be solved is that providing, a kind of casting dimension accuracy is high, and surface smoothness is high
And the lesser iron die sand casting process of deflection；The technical solution of use are as follows: the pouring temperature by controlling molten iron is 1450
DEG C -1600 DEG C, the duration of pouring was less than 60 seconds and some other process conditions reduce the stress deformation of casting, using this hair
The axle housing casting of bright technical process manufacture, surface smoothness, dimensional accuracy is high, and deflection is small.But the patent application is not draped over one's shoulders
Reveal the concrete technology system of related nut casting.
Summary of the invention
Brief summary of the present invention is given below, in order to provide the basic reason about certain aspects of the invention
Solution.It should be appreciated that this summary is not an exhaustive overview of the invention.It is not intended to determine key of the invention
Or pith, nor is it intended to limit the scope of the present invention.Its purpose only provides certain concepts in simplified form, with
This is as the preamble in greater detail discussed later.
The present invention provides a kind of nut casting processing method, and preparation method is made of following steps: step 1 takes and covers
Film sand injects valve plate die cavity, keeps the temperature so that precoated sand curing molding, molding obtain resin-coated sand shell mould；Step 2, by overlay film arenaceous shell
Type mould assembly and vertical clamping form casting type chamber；Step 3 takes iron liquid, later by iron liquid casting into casting type chamber, must cast
Part；Step 4 takes casting, and cooling, ball blast finishing is to get nut.
Compared with prior art, the present invention is with following the utility model has the advantages that casting the traditional production method of nut is to pass through
Clay damp sand cast molding, the dimensional accuracy of product is low, high rejection rate, low efficiency, and the internal screw thread that also will cause portioned product lacks
It loses, it is necessary to be just able to achieve by subsequent machining, cause production cost high.Method of the invention effectively solves
Dimensional accuracy present in casting nut production technology is low, and qualification rate is low, the low technical problem of production efficiency.The present invention realizes
Following technical effect: method of the invention so that the internal screw thread disposal molding of casting nut, production efficiency double with
On, product qualification rate improves 30% or more.
Specific embodiment
The embodiment of the present invention addressed below.The elements and features described in one embodiment of the invention can be with
The elements and features shown in one or more other embodiments combine.It should be noted that for purposes of clarity, saying
The expression and description of component unrelated to the invention, known to persons of ordinary skill in the art and processing are omitted in bright.
1 the present embodiment of embodiment is related to a kind of nut casting processing method, and the preparation method is made of following steps:
Step 1 takes precoated sand to inject valve plate die cavity, keeps the temperature so that precoated sand curing molding, molding obtain resin-coated sand shell mould；The injection
Using penetrating sand machine, the pressure control of penetrating sand machine is 0.7Mpa；The temperature control of penetrating sand machine is 205 DEG C；Penetrating sand machine penetrates sand
Number is 4 times, and the interval time for penetrating sand every time is 4 seconds；Inject valve plate die cavity before, valve plate die cavity is carried out being heated to temperature be
175℃；The heat preservation specifically: keeping temperature is 186 DEG C, and the time is 15 seconds；Step 2 by resin-coated sand shell mould mould assembly and is hung down
It is straight to clamp, form casting type chamber；Step 3 takes iron liquid, and iron liquid casting is obtained casting into casting type chamber later；The iron liquid
Temperature be 1450 DEG C；The casting specifically: place sprue cup and be poured, using pouring in vertically clamped moulds mode, casting ladle distance is poured
The height of cup is 9cm；The time of the casting is 10 seconds；It is calculated in mass percent, in the iron liquid, carbon≤3.2%, silicon≤
1.8%, manganese≤0.3%；Step 4 takes casting, cooling, and ball blast finishing is to get casting nut.The effect of the present embodiment is:
Method of the invention efficiently solve casting nut production technology present in dimensional accuracy it is low, qualification rate is low, and production efficiency is low
The technical issues of.Method of the invention, so that the internal screw thread disposal molding of casting nut, production efficiency are enhanced about more than once,
Product qualification rate improves 35%.
2 the present embodiment of embodiment is related to a kind of nut casting processing method, and the preparation method is made of following steps:
Step 1 takes precoated sand to inject valve plate die cavity, keeps the temperature so that precoated sand curing molding, molding obtain resin-coated sand shell mould；The injection
Using penetrating sand machine, the pressure control of penetrating sand machine is 1.0Mpa；The temperature control of penetrating sand machine is 225 DEG C；Penetrating sand machine penetrates sand
Number is 4 times, and the interval time for penetrating sand every time is 5 seconds；Inject valve plate die cavity before, valve plate die cavity is carried out being heated to temperature be
185℃；The heat preservation specifically: keeping temperature is 195 DEG C, and the time is 25 seconds；Step 2 by resin-coated sand shell mould mould assembly and is hung down
It is straight to clamp, form casting type chamber；Step 3 takes iron liquid, and iron liquid casting is obtained casting into casting type chamber later；The iron liquid
Temperature be 1500 DEG C；The casting specifically: place sprue cup and be poured, using pouring in vertically clamped moulds mode, casting ladle distance is poured
The height of cup is 12cm；The time of the casting is 50 seconds；It is calculated in mass percent, in the iron liquid, carbon≤3.2%, silicon
≤ 1.8%, manganese≤0.3%；Step 4 takes casting, cooling, and ball blast finishing is to get casting nut.The effect of the present embodiment
Be: method of the invention efficiently solve casting nut production technology present in dimensional accuracy it is low, qualification rate is low, production efficiency
Low technical problem.Method of the invention so that casting nut internal screw thread disposal molding, production efficiency double with
On, product qualification rate improves 40%.
Claims (8)
1. a kind of nut casts processing method, which is characterized in that the preparation method is made of following steps: step 1 takes and covers
Film sand injects valve plate die cavity, keeps the temperature so that precoated sand curing molding, molding obtain resin-coated sand shell mould；Step 2, by overlay film arenaceous shell
Type mould assembly and vertical clamping form casting type chamber；Step 3 takes iron liquid, later by iron liquid casting into casting type chamber, must cast
Part；Step 4 takes casting, and cooling, ball blast finishing is to get nut.
2. nut according to claim 1 casts processing method, which is characterized in that in step 1, what the injection used
It is penetrating sand machine, the pressure control of penetrating sand machine is 07Mpa-1.0Mpa.
3. nut according to claim 1 casts processing method, which is characterized in that in step 1, the temperature control of penetrating sand machine
It is made as 205-225 DEG C.
4. nut according to claim 1 casts processing method, which is characterized in that in step 1, penetrating sand machine penetrates time of sand
Number is 4 times, and the interval time for penetrating sand every time is 4-5 seconds.
5. nut according to claim 1 casts processing method, which is characterized in that in step 1, inject valve plate die cavity it
Before, valve plate die cavity is carried out being heated to temperature being 175-185 DEG C.
6. nut according to claim 1 casts processing method, which is characterized in that in step 1, the heat preservation specifically:
Keeping temperature is 186-195 DEG C, and the time is 15-25 seconds.
7. nut according to claim 1 casts processing method, which is characterized in that in step 3, the temperature of the iron liquid
It is 1450-1500 DEG C；The casting specifically: place sprue cup and be poured, using pouring in vertically clamped moulds mode, casting ladle is apart from cast gate
The height of cup is 9-12cm；The time of the casting is 10-50 seconds.
8. nut according to claim 1 casts processing method, which is characterized in that in step 3, it is calculated in mass percent,
In the iron liquid, carbon≤3.2%, silicon≤1.8%, manganese≤0.3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711313755.7A CN109909454A (en) | 2017-12-12 | 2017-12-12 | Nut casts processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711313755.7A CN109909454A (en) | 2017-12-12 | 2017-12-12 | Nut casts processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109909454A true CN109909454A (en) | 2019-06-21 |
Family
ID=66957332
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711313755.7A Withdrawn CN109909454A (en) | 2017-12-12 | 2017-12-12 | Nut casts processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109909454A (en) |
-
2017
- 2017-12-12 CN CN201711313755.7A patent/CN109909454A/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190621 |