CN104117630B - Main oil gallery sand core mold of large engine body and core manufacturing method - Google Patents
Main oil gallery sand core mold of large engine body and core manufacturing method Download PDFInfo
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- CN104117630B CN104117630B CN201410307335.8A CN201410307335A CN104117630B CN 104117630 B CN104117630 B CN 104117630B CN 201410307335 A CN201410307335 A CN 201410307335A CN 104117630 B CN104117630 B CN 104117630B
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Abstract
The invention discloses a main oil gallery sand core mold of a large engine body. The main oil gallery sand core mold of the large engine body comprises an upper core box, a lower core box, an iron core, a funnel and locking devices, wherein the upper core box is provided with an upper semicircular groove, and the lower core box is provided with a lower semicircular groove, and the upper core box and the lower core box are buckled to form a main oil gallery sand core mold cavity which forms a main oil gallery sand core box cavity; the locking devices are respectively positioned on the upper core box and the lower core box so as to lock the upper core box and the lower core box; the iron core is positioned in the main oil gallery sand core box cavity; the funnel is detachably fixed on one end of the main oil gallery sand core mold cavity. The upper core box and the lower core box are buckled to form the main oil gallery sand core cylindrical cavity, and the manufactured sand core is smooth, is high in intensity, and is good in using performance.
Description
Technical field
The present invention relates to large-scale body casting field, especially relate to a kind of large-scale body main oil gallery core mold and coremaking
Method.
Background technology
Medium and small-scale diesel engine body main oil gallery using processing method or will be filled with the seamless steel pipe of precoated sand and is cast into main oil gallery
Interior.
The main oil gallery requirement core of 12v260 body is formed, and the length of main oil gallery is 4.8 meters, main oil gallery core mold
The selection of structure and core-making method is most important.Main oil gallery length is less than to 3 meters of core, the core-making method of employing is resin
Sand, method for designing is one-piece core box for bottom, and top is slide block, and shortcoming is that sand core strength is low, is difficult to tamp, the degree of packing is poor, sand
Core easy fracture.
Content of the invention
The technical problem to be solved is, the shortcoming overcoming prior art, provides a kind of large-scale body main oil gallery
Core mold and core-making method, the core that it is made is bright and clean, and intensity is high, and serviceability is good.
In order to solve above technical problem, the present invention provides a kind of large-scale body main oil gallery core mold, including upper core box,
Lower core box, core iron, funnel and locking device；Described upper core box has upper half circular trough, and lower core box has a lower semi-circular groove, upper core box with
Lower core box is interlocked formation main oil gallery core die cavity, and main oil gallery core die cavity constitutes main oil gallery core core box cavity, described lock
Tight device is located in upper core box and lower core box respectively, by upper core box and lower core box locking；Described core iron is located at main oil gallery core
In core box cavity, funnel is detachably secured to one end of main oil gallery core die cavity.
Being further defined to of technical solution of the present invention, described upper core box is upper half hollow cylinder cavity, on described
The border of semi-hollow circular cylindrical cavity has extended axially upward reinforcement, and described lower core box is lower half hollow cylinder cavity,
Extend axially downward reinforcement in the border of described lower half hollow cylinder cavity.
Being further defined to of technical solution of the present invention, is cast with circular hole on described both sides are strengthened.
Being further defined to of technical solution of the present invention, also includes core ejection mechanism, and described core ejection mechanism includes top board, top
Bar, bolt, nut and push rod, the push rod that the end fixation of bolt axially can relatively rotate along bolt, described top board is fixed on spiral shell
On bolt, described bolt can move up and down along the nut being fixed in upper core box and lower core box, and top is fixed in one end of described push rod
On plate, the inwall that the other end of push rod is each passed through main oil gallery core die cavity peaks on film covered sand core fuse.
Being further defined to of technical solution of the present invention, also includes core iron positioner, and described core iron positioner includes
Positioning table and alignment pin, described positioning table is located at the side of main oil gallery core die cavity, and alignment pin is fixed on funnel, and alignment pin
Can be fixed in the endoporus of core iron, groove be had on alignment pin and is connected with the endoporus of core iron.
Being further defined to of technical solution of the present invention, is drilled with many exhausting holes on described core iron.
Being further defined to of technical solution of the present invention, described through hole is multiple rows of aperture of radially even distribution is ф 10
~ 20mm, axial spacing is the uniform hole of 200 ~ 400mm.
Being further defined to of technical solution of the present invention, is wound with rope of giving vent to anger, described rope one end of giving vent to anger in the periphery of core iron
It is fixed on through hole, the other end grows core iron.
Based on foregoing invention purpose, the present invention also proposes a kind of large-scale body main oil gallery core mold core-making method, will be upper
Core box and lower core box are interlocked and form main oil gallery core die cavity, and core iron is placed in main oil gallery core die cavity, and funnel is detachable
The one end being fixed on main oil gallery core die cavity；Using high-strength bolt, lower core box and lower core box are locked, then core box is stood
Rise, fill up precoated sand；Seal back-up sand mouth after ram-jolt, then core box is set level, connect heating tube, so that film covered sand core is fully cured；?
After be air cooled to room temperature, core is ejected.
The invention has the beneficial effects as follows: it is interlocked using upper core box, lower core box and form main oil gallery sand-core cylinder shape cavity, its
The core made is bright and clean, and intensity is high, and serviceability is good.
Can effectively prevent upper core box and lower core box from deforming using reinforcement.
Reinforcement is cast with circular hole, when can effectively prevent from heating and cooling down, core box deforms because expanding with heat and contract with cold and causes
Core box crackle.
Using top board, it is easy to compress upper half hollow cylinder cavity and upper half circular cavity, in addition adopt overall top board
Core ejection mechanism is easy to steadily eject core.
Core iron positioner can by core iron well positioning it is ensured that the concentricity of main oil gallery core and core iron is it is ensured that core
Sand thickness inside and outside iron is uniform.
Multiple through holes are drilled with core iron, so that the precoated sand inside and outside core iron is coupled together, be easy to lead to the gas of core
Cross rope of giving vent to anger to go out.
It is wound with, in the periphery of core iron, rope of giving vent to anger, be easy to go out the gas of core by rope of giving vent to anger.
Brief description
Fig. 1 is the schematic top plan view of the present invention；
Fig. 2 is the p-p cross-sectional schematic of the present invention；
Fig. 3 is the r-r cross-sectional schematic of the present invention；
Fig. 4 is that the present invention erects the p-p revolved section schematic diagram after back-up sand；
Fig. 5 is core iron bore position of the present invention and the schematic perspective view releasing gas rope.
Specific embodiment
Below in conjunction with the accompanying drawings, the specific embodiment of the present invention is described in detail.
As shown in Figure 1 to Figure 3, a kind of large-scale body main oil gallery core mold, including upper core box 1, lower core box 11, core iron
10th, funnel 9 and locking device；Upper core box 1 and lower core box 11 are symmetrical, and described upper core box 1 has upper half circular trough, under lower core box 11 has
Semi-circular groove, upper core box 1 and lower core box 11 are interlocked and form main oil gallery core die cavity, and main oil gallery core die cavity constitutes main oil gallery sand
Core core box cavity, described locking device is located in upper core box 1 and lower core box 11 respectively, and upper core box 1 and lower core box 11 are locked；
Described locking device includes fastening ear 14 and high-strength bolt, in described upper core box 1 and lower core box 11 both sides in the horizontal direction
Stretch out fastening ear 14 to outer, described high-strength bolt passes through fastening ear 14 to lock upper core box 1 and lower core box 11.Described upper core
Box 1 is upper half hollow cylinder cavity, and in the border of described upper half hollow cylinder cavity, vertical direction upwardly extends vertically
There is reinforcement, described lower core box 11 is lower half hollow cylinder cavity, in the border of described lower half hollow cylinder cavity along axle
It is extended with reinforcement under vertical direction, described reinforcement is cast with circular hole 15.Also include core ejection mechanism, described core ejection mechanism
Including upper plate 3, lower roof plate 7, push rod 5, bolt 4, nut and push rod 13, described upper plate 3 and lower roof plate 7 peak at core respectively
On the upper and lower semi-hollow circular cylindrical cavity of upper half hollow cylinder cavity of box 1 and lower core box 11, the end fixation of bolt 4 can edge
The push rod 13 that bolt axially relatively rotates, described upper plate 3 and lower roof plate 7 are individually fixed on bolt 4, and described bolt 4 can edge
It is fixed on upper core box 1 and the nut of lower core box 11 moves up and down, one end of described push rod 5 is individually fixed in upper plate 3 and Xia Ding
On plate 7, the other end of push rod 5 is each passed through upper half hollow cylinder cavity and lower half hollow cylinder cavity peaks at film covered sand core
On fuse.When bolt 4 moves up and down, upper plate 3 and lower roof plate 7 can be with moving up and down together with bolt 4, thus driving push rod
5 movement.Relatively-movable respectively in upper plate 3 vertical direction vertically it is connected with guide post 6 on multiple, in Xia Ding
Relatively-movable respectively in plate vertical direction vertically be connected with multiple lower guide posts 18, upper guide post 6 one end is fixed on
In upper core box, lower guide post 18 one end is fixed in lower core box, when upper plate 3 and lower roof plate 7 are mobile, upper guide post 6 and under
Guide post 18 can guide the moving direction of upper plate 3 and lower roof plate 7 respectively, thus realizing the accurately fixed of upper plate 3 and lower roof plate 7
Position.Described core iron 10 is located in main oil gallery core core box cavity, and funnel 9 is detachably secured to the one of main oil gallery core die cavity
End.Also include core iron positioner, described core iron positioner includes positioning table 2 and alignment pin, described positioning table 2 is located at main oil
The side of road core die cavity, alignment pin is fixed on funnel 9, and alignment pin can be fixed in the endoporus of core iron 10, in alignment pin
On have groove and be connected with the endoporus of core iron 10.As shown in figure 5, being drilled with multiple through holes on described core iron 10.Described logical
Hole is multiple rows of aperture of radially even distribution is ф 10 ~ 20mm, and axial spacing is the uniform hole of 200 ~ 400mm.Edge during boring
Core iron 10 radially directly bores, and forms two rounds.Then core iron 10 is rotated 90 °, wrong vertically with two rounds being drilled
Open the distance of 100mm, bore another 2 rounds.Being formed and boring 4 row's ф 10mm spacing is the uniform hole of 200mm, makes inside and outside core iron 10 after boring
Precoated sand couple together, be easy to go out the gas of core by rope of giving vent to anger.It is wound with rope of giving vent to anger in the periphery of core iron 10, described
Give vent to anger rope one end be fixed on through hole, the other end grows core iron 10.It is respectively fixed with the outer surface of upper core box 1 and lower core box 11
Hanging axis 12.
When needing coremaking, upper core box 1 is steadily sling, and core box interior is cleaned out, and so that bolt 4 is revolved by push rod 13
Turn, by upper guide post 6 and lower guide post 18, the lower roof plate 7 of the upper plate 3 of upper core box 1 and lower core box 11 is replied and put in place, really
Protect push rod 5 equal with core box inner surface.It is wound around rope of giving vent to anger outside core iron 10, one end is fixed at the hole of ф 10mm, and the other end is long
Go out core box 300mm.Position on the position of the inner chamber positioning table 2 core iron 10 being put into lower core box 11.Upper core box 1 is sling, passes through
Alignment pin is put in lower core box 11.As shown in figure 4, being put into back-up sand funnel 9 at the positioning spigot 17 of core box end face, pass through simultaneously
The other end of core iron 10 is lived position by the alignment pin of back-up sand funnel 9 surely.Symmetrically the fastening ear 14 of upper lower core box is fastened, hang core
Core box is integrally erected by the hanging axis 12 of box.By back-up sand funnel 9, core box inner chamber is filled up after precoated sand, be put into plain jolter carry out micro-
Shake；After guaranteeing that the sand inside and outside core iron 10 is filled out and put in place, sealed at back-up sand mouth with repairing furnace charge.Again core box is set level, by heating
Heating tube 8 is energized by device, and the circular hole 15 of core box is that when preventing core box heating and cooling down, deformation causes crackle, using temperature-when
Between controller control precoated sand core solidification.When core box temperature is brought down below 50 °, the bolt at fastening ear 14 is laid down.
Gently rotate back-up sand funnel 9 and take off.The push rod 13 simultaneously pushing hard upper core box makes bolt 4 rotate, as shown in figure 3, first passing through
Core box push rod 16 is by first for upper core box 1 jack-up 5mm-10mm, then upper core box 1 is slowly sling, and pushes hard pushing away of lower core box 11 simultaneously
Bar 13 makes bolt 4 rotate, and drives push rod 5 by core jack-up 30mm by lower roof plate 7, this core ejection mechanism push rod 5 is solid respectively
Fixed is an entirety with upper plate 3 and lower roof plate 7 on upper plate 3 and lower roof plate 7, is easy to, simultaneously by steady for core jack-up, use
3 soft ribbons axially uniformly pass through core along core, manually core are put into smooth position.
Embodiment two: in addition, for the precision ensureing main oil gallery core die cavity, certain thickness upper half can be made circular
Cavity and lower semi-circular cavity, upper core box and lower core box are interlocked and form main oil gallery core die cavity.Although this structure compares consumption
Material, but also enable the purpose of the present invention.
In addition to the implementation, the present invention can also have other embodiment.All employing equivalents or equivalent transformation shape
The technical scheme becoming, all falls within the protection domain of application claims.
Claims (6)
1. a kind of large-scale body main oil gallery core mold it is characterised in that: include upper core box, lower core box, core iron, funnel and locking
Device；Described upper core box has upper half circular trough, and lower core box has a lower semi-circular groove, and upper core box and lower core box are interlocked formation main oil gallery
Core die cavity, main oil gallery core die cavity constitutes main oil gallery core core box cavity, described locking device be located at respectively upper core box and
In lower core box, by upper core box and lower core box locking；Described core iron is located in main oil gallery core core box cavity, and funnel is dismountable
It is fixed on one end of main oil gallery core die cavity；Described upper core box is upper half hollow cylinder cavity, in described upper half hollow cylinder
The border of shape cavity has extended axially upward reinforcement, and described lower core box is lower half hollow cylinder cavity, in described lower half
The border of hollow cylinder cavity has extended axially downward reinforcement；Described reinforcement is cast with circular hole；Also include plunger tip
Mechanism, described core ejection mechanism includes top board, push rod, bolt, nut and push rod, and the end fixation of bolt can be axially opposing along bolt
The push rod rotating, described top board is fixed on bolt, and described bolt can be upper and lower along the nut being fixed in upper core box and lower core box
Mobile, one end of described push rod is fixed on top board, and the inwall that the other end of push rod is each passed through main oil gallery core die cavity peaks at
On film covered sand core fuse.
2. large-scale body main oil gallery core mold according to claim 1 it is characterised in that: also include core iron positioning dress
Put, described core iron positioner includes positioning table and alignment pin, described positioning table is located at the side of main oil gallery core die cavity, positioning
Pin is fixed on funnel, and alignment pin can be fixed in the endoporus of core iron, has the endoporus phase of groove and core iron on alignment pin
Connection.
3. large-scale body main oil gallery core mold according to claim 1 it is characterised in that: be drilled with described core iron
Many exhausting holes.
4. large-scale body main oil gallery core mold according to claim 3 it is characterised in that: described through hole be radially equal
Multiple rows of aperture of even distribution is ф 10～20mm, and axial spacing is the uniform hole of 200～400mm.
5. large-scale body main oil gallery core mold according to claim 3 it is characterised in that: be wound with the periphery of core iron
Give vent to anger rope, described rope one end of giving vent to anger is fixed on through hole, and the other end grows core iron.
6. a kind of large-scale body main oil gallery core mold core-making method, using large-scale body main oil gallery as claimed in claim 1
Core mold it is characterised in that: by upper core box and lower core box be interlocked formation main oil gallery core die cavity, core iron is placed in main oil gallery
In core die cavity, funnel is detachably secured to one end of main oil gallery core die cavity；Using high-strength bolt by lower core box and
Lower core box is locked, and then erects core box, fills up precoated sand；Seal back-up sand mouth after ram-jolt, then core box is set level, connect heating
Pipe, makes film covered sand core be fully cured；Finally it is air cooled to room temperature, core is ejected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410307335.8A CN104117630B (en) | 2014-06-30 | 2014-06-30 | Main oil gallery sand core mold of large engine body and core manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410307335.8A CN104117630B (en) | 2014-06-30 | 2014-06-30 | Main oil gallery sand core mold of large engine body and core manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104117630A CN104117630A (en) | 2014-10-29 |
| CN104117630B true CN104117630B (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410307335.8A Active CN104117630B (en) | 2014-06-30 | 2014-06-30 | Main oil gallery sand core mold of large engine body and core manufacturing method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104353791B (en) * | 2014-11-13 | 2016-09-21 | 四川南车共享铸造有限公司 | A kind of oil pipe foundry sand cored structure and preparation method thereof, application |
| CN106424592B (en) * | 2016-11-01 | 2018-08-24 | 华东泰克西汽车铸造有限公司 | A kind of thin oil duct core core making device of horizontal parting |
| CN106541083A (en) * | 2016-12-08 | 2017-03-29 | 广西玉柴机器股份有限公司 | The core-making method of large-sized diesel engine cylinder water channel core |
| CN107052237B (en) * | 2017-06-09 | 2019-03-05 | 安徽全柴天和机械有限公司 | A kind of core box structure preparing diesel engine integral sand core |
| CN111390120B (en) * | 2020-05-09 | 2021-04-23 | 大连华锐重工铸业有限公司 | Core making method of middle hole sand core of large injection molding machine template casting |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS63160746A (en) * | 1986-12-23 | 1988-07-04 | Asahi Malleable Iron Co Ltd | Casting method for cast iron made piston |
| CN201720394U (en) * | 2010-07-09 | 2011-01-26 | 宁波凯利机械模具有限公司 | Hollow, large-scale and columnar sand core mould |
| CN202427893U (en) * | 2012-01-06 | 2012-09-12 | 广西玉柴机器股份有限公司 | Mould of main oil duct sand core of large diesel engine |
| CN103736919B (en) * | 2014-01-29 | 2016-02-24 | 广西玉柴机器股份有限公司 | Large-scale diesel engine aerial cooler core mold |
| CN203900386U (en) * | 2014-06-30 | 2014-10-29 | 济柴聊城机械有限公司 | Sand core die of main oil gallery of large machine body |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 252000 No. 169, Liaohe Road, Liaocheng Economic Development Zone, Liaocheng, Shandong Applicant after: Liaocheng Xin Luo Machinery Co., Ltd. Address before: 252000 No. 169, Liaohe Road, Liaocheng Economic Development Zone, Liaocheng, Shandong Applicant before: JICHAI LIAOCHENG MACHINERY CO., LTD. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Main oil gallery sand core mold of large engine body and core manufacturing method Effective date of registration: 20181221 Granted publication date: 20170118 Pledgee: Huaxia Bank Limited by Share Ltd Liaocheng Dongchang Branch Pledgor: Liaocheng Xin Luo Machinery Co., Ltd. Registration number: 2018370000227 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |