CN109773136A - A method of preventing the tiny runner sand core cracking of pump housing class casting - Google Patents
A method of preventing the tiny runner sand core cracking of pump housing class casting Download PDFInfo
- Publication number
- CN109773136A CN109773136A CN201910191767.XA CN201910191767A CN109773136A CN 109773136 A CN109773136 A CN 109773136A CN 201910191767 A CN201910191767 A CN 201910191767A CN 109773136 A CN109773136 A CN 109773136A
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- China
- Prior art keywords
- core
- sand
- sand core
- runner
- link slot
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005266 casting Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005336 cracking Methods 0.000 title claims abstract description 17
- 239000004576 sand Substances 0.000 claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 5
- 239000010959 steel Substances 0.000 claims abstract description 5
- 241001417490 Sillaginidae Species 0.000 claims abstract description 4
- 238000003723 Smelting Methods 0.000 claims abstract description 4
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000005498 polishing Methods 0.000 claims description 7
- 238000007596 consolidation process Methods 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 235000013372 meat Nutrition 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 62
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009659 non-destructive testing Methods 0.000 description 2
- 206010039509 Scab Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007528 sand casting Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a kind of methods for preventing the tiny runner sand core cracking of pump housing class casting, include the following steps: to open up link slot respectively at the water-stop sheet at mouthpiece both ends on core box；A link slot is opened again in the midpoint of above-mentioned two link slot line；Cleaning core box simultaneously makes mark；Coremaking；Coring: hardened sand core is taken out out of core box, it is desirable that firmly uniformly, inside and outside runner sand core forms connecting rib after coring；Swabbing；Lower core；Mould assembling；Melting, casting: pass through that smelting furnace smelts molten steel and to be poured into type intracavitary；Sand removal cutting；The present invention is by opening link slot at the water-stop sheet of pump body cast runner core box, link slot is filled up with core sand when coremaking, inside and outside runner sand core forms connecting rib after coring, to make inside and outside runner sand core link together, to improve the integral strength of runner sand core, to eliminate the cracking or breakage problem when sand core molding and overturning.
Description
Technical field
It is specifically a kind of to prevent the tiny stream of pump housing class casting the present invention relates to the sand casting production field of pump housing class casting
The method of road sand core cracking.
Background technique
The spiral case pump housing class casting of tiny runner, water outlet end flow channel shape complexity and narrow elongate, intermediate shunting
Runner is divided into inside and outside two parts again by plate, and the two is converged in mouthpiece position and connected, and mouthpiece's sectional dimension is generally smaller, so leading
It causes contact surface also smaller, causes sand core cracking or fracture when coring and swabbing are overturn, especially split in mouthpiece position
Tendency it is maximum, even if but also reducing the integral strength of sand core for processing is tamped at cracking again, in lower core mould assembling because by
Power still can split again, will form joint flash, scab defect after casting, because unique structure makes polishing remove these defects
It is difficult, it is scrapped to generate.To avoid sand core from cracking, usually using biggish arbor and special sand to improve the whole of sand core
Body intensity.
Prior art have the disadvantage in that firstly, narrow tiny runner using larger arbor to will lead to mold thickness small, can make
At molten steel and arbor adhesion, arbor can not be taken out after casting；Secondly, the common silica sand of the density ratio of special sand is big, special sand is used
Coremaking will increase the weight of sand core, and biggish weight equally understands growing crack risk, and in addition special sand price is high, and increase is produced into
This.
Summary of the invention
The purpose of the present invention is to provide a kind of methods for preventing the tiny runner sand core cracking of pump housing class casting, on solving
State the problem of proposing in background technique.
To achieve the above object, the invention provides the following technical scheme:
A method of the tiny runner sand core cracking of pump housing class casting is prevented, is included the following steps:
(1) determines fixation, core print and the kind sand type of sand core by casting technique；
(2) draws 3D figure, according to outlet flow sand core chamfered shape, designs corresponding core mould；
(3) opens up link slot at the water-stop sheet at mouthpiece both ends on core box respectively；
(4) opens a link slot in the midpoint of above-mentioned two link slot line again；
(5) clears up core box and makes mark, it is desirable that can smoothly back-up sand and modulus, inspection test to ensure to meet founder
Skill requirement；
(6) coremaking: the arbor of appropriate size is placed in core box referring to the actual cross-sectional dimensions of runner, what is be blended
Core sand is filled out in outlet flow core box；
(7) coring: hardened sand core is taken out out of core box, it is desirable that firmly uniformly, inside and outside runner sand after coring
Core forms connecting rib；
(8) swabbing: requiring according to casting technique, in the coating of the external coating suitable thickness of sand core, when overturning tune face
It is careful to operate, uniform coating thickness, there can be no phenomenon of flaking, sand core surface wants bright and clean；
(9) core under；The overturning of coring, swabbing and sand core is completed under the enhancing protection of connecting rib, presses core side
To by sand core standing upright, connecting rib is polished and is removed, mends swabbing, it is then that sand core is intracavitary down toward type；
(10) mould assembling: upper and lower case is combined, and forms complete type chamber；
(11) melting, casting: pass through that smelting furnace smelts molten steel and to be poured into type intracavitary；
(12) sand removal is cut；Unpacking and sand removal and cutting riser, pay attention to avoiding colliding with and digging meat after solidification heat preservation；Into
Road polishing operation afterwards, including heat treatment, non-destructive testing etc..
Preferably, in step (3) and step (4), height≤runner height of the link slot.
Preferably, in step (3) and step (4), length >=50mm of the link slot.
Preferably, in step (6), core sand is filled out in outlet flow core box, to accomplish to reinforce consolidation.
Preferably, before step (9) swabbing, the burr of polishing finishing sand core checks the chamfered shape of sand core
And critical size, guarantee that sand core is bright and clean complete.
Compared with prior art, the beneficial effects of the present invention are:
The present invention by opening link slot at the water-stop sheet of pump body cast runner core box, fill out link slot with core sand by when coremaking
Full, inside and outside runner sand core forms connecting rib after coring, to make inside and outside runner sand core link together, to improve runner sand
The integral strength of core, to eliminate the cracking or breakage problem when sand core molding and overturning.
Detailed description of the invention
Fig. 1 is the runner core box figure that link slot is arranged as made from the method for the present invention；
Fig. 2 is the core box sectional view that link slot is arranged as made from the method for the present invention；
Fig. 3 is the runner sand core figure that link slot is arranged as made from the method for the present invention；
Fig. 4 is the sand core schematic cross-section that link slot is arranged as made from the method for the present invention；
Fig. 5 is the runner core box figure of not set link slot；
The core box sectional view of the not set link slot of Fig. 6
The runner sand core figure of the not set link slot of Fig. 7；
Fig. 8 is the sand core schematic cross-section of not set link slot.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1~4, in the embodiment of the present invention, a method of the tiny runner sand core cracking of pump housing class casting is prevented,
Include the following steps:
(1) determines fixation, core print and the kind sand type of sand core by casting technique；
(2) draws 3D figure, according to outlet flow sand core chamfered shape, designs corresponding core mould；
(3) opens up link slot 1 at the water-stop sheet at mouthpiece both ends on core box respectively；
(4) opens a link slot 1 in the midpoint of above-mentioned two link slot line again；
(5) clears up core box and makes mark, it is desirable that can smoothly back-up sand and modulus, inspection test to ensure to meet founder
Skill requirement；
(6) coremaking: the arbor of appropriate size is placed in core box referring to the actual cross-sectional dimensions of runner, what is be blended
Core sand is filled out in outlet flow core box；
(7) coring: hardened sand core is taken out out of core box, it is desirable that firmly uniformly, inside and outside runner sand after coring
Core forms connecting rib 2；
(8) swabbing: requiring according to casting technique, in the coating of the external coating suitable thickness of sand core, when overturning tune face
It is careful to operate, uniform coating thickness, there can be no phenomenon of flaking, sand core surface wants bright and clean；
(9) core under；The overturning of coring, swabbing and sand core is completed under the enhancing protection of connecting rib, presses core side
To by sand core standing upright, connecting rib 2 is polished and is removed, mends swabbing, it is then that sand core is intracavitary down toward type；
(10) mould assembling: upper and lower case is combined, and forms complete type chamber；
(11) melting, casting: pass through that smelting furnace smelts molten steel and to be poured into type intracavitary；
(12) sand removal is cut；Unpacking and sand removal and cutting riser, pay attention to avoiding colliding with and digging meat after solidification heat preservation；Into
Road polishing operation afterwards, including heat treatment, non-destructive testing etc..
Preferably, in step (3) and step (4), height≤runner height of the link slot.
Preferably, in step (3) and step (4), length >=50mm of the link slot.
Preferably, in step (6), core sand is filled out in outlet flow core box, to accomplish to reinforce consolidation.
Preferably, before step (9) swabbing, the burr of polishing finishing sand core checks the chamfered shape of sand core
And critical size, guarantee that sand core is bright and clean complete.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (5)
1. a kind of method for preventing the tiny runner sand core cracking of pump housing class casting, which comprises the steps of:
(1) determines fixation, core print and the kind sand type of sand core by casting technique；
(2) draws 3D figure, according to outlet flow sand core chamfered shape, designs corresponding core mould；
(3) opens up link slot at the water-stop sheet at mouthpiece both ends on core box respectively；
(4) opens a link slot in the midpoint of above-mentioned two link slot line again；
(5) clears up core box and makes mark, it is desirable that can smoothly back-up sand and modulus, inspection test to ensure to meet casting technique and want
It asks；
(6) coremaking: the arbor of appropriate size is placed in core box referring to the actual cross-sectional dimensions of runner, the core sand being blended
It fills out in outlet flow core box；
(7) coring: hardened sand core is taken out out of core box, it is desirable that firmly uniformly, inside and outside runner sand core shape after coring
At connecting rib；
(8) swabbing: requiring according to casting technique, in the coating of the external coating suitable thickness of sand core, overturns tune face Shi Yao little
Heart operation, uniform coating thickness, there can be no phenomenon of flaking, sand core surface wants bright and clean；
(9) core under；The overturning of coring, swabbing and sand core is completed under the enhancing protection of connecting rib, pressing core direction will
Connecting rib is polished and is removed by sand core standing upright, mends swabbing, then that sand core is intracavitary down toward type；
(10) mould assembling: upper and lower case is combined, and forms complete type chamber；
(11) melting, casting: pass through that smelting furnace smelts molten steel and to be poured into type intracavitary；
(12) sand removal is cut；Unpacking and sand removal and cutting riser, pay attention to avoiding colliding with and digging meat after solidification heat preservation；Into rear road
Polishing operation.
2. the method according to claim 1 for preventing the tiny runner sand core cracking of pump housing class casting, which is characterized in that step
(3) and in step (4), height≤runner height of the link slot.
3. the method according to claim 1 for preventing the tiny runner sand core cracking of pump housing class casting, which is characterized in that step
(3) and in step (4), length >=50mm of the link slot.
4. the method according to claim 1 for preventing the tiny runner sand core cracking of pump housing class casting, which is characterized in that step
(6) in, core sand is filled out in outlet flow core box, to accomplish to reinforce consolidation.
5. the method according to claim 1 for preventing the tiny runner sand core cracking of pump housing class casting, which is characterized in that in step
Suddenly before (9) swabbing, the burr of polishing finishing sand core checks the chamfered shape and critical size of sand core, guarantees sand core
It is bright and clean complete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910191767.XA CN109773136B (en) | 2019-03-14 | 2019-03-14 | Method for preventing small runner sand core of pump body type casting from cracking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910191767.XA CN109773136B (en) | 2019-03-14 | 2019-03-14 | Method for preventing small runner sand core of pump body type casting from cracking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109773136A true CN109773136A (en) | 2019-05-21 |
| CN109773136B CN109773136B (en) | 2020-07-17 |
Family
ID=66487920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910191767.XA Active CN109773136B (en) | 2019-03-14 | 2019-03-14 | Method for preventing small runner sand core of pump body type casting from cracking |
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| Country | Link |
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| CN (1) | CN109773136B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3626994C1 (en) * | 1986-08-08 | 1987-12-10 | Joachim Dipl-Ing Laempe | Shooting device on a core shooter |
| CN102601318A (en) * | 2011-12-15 | 2012-07-25 | 宁夏共享集团有限责任公司 | Casting method for thin-wall annular cast |
| CN102626769A (en) * | 2012-04-10 | 2012-08-08 | 遵义拓特铸锻有限公司 | Manufacturing process of pump body casting of super duplex stainless steel centrifugal pump |
| CN103962511A (en) * | 2014-05-13 | 2014-08-06 | 淄博华成泵业有限公司 | Manufacturing method of integral impeller sand core |
| CN105945231A (en) * | 2016-06-02 | 2016-09-21 | 共享装备股份有限公司 | Core drifting-prevention and bending-resistance arbor for volute type casting sand core |
| CN107052237A (en) * | 2017-06-09 | 2017-08-18 | 安徽全柴天和机械有限公司 | A kind of core box structure for preparing diesel engine integral sand core |
-
2019
- 2019-03-14 CN CN201910191767.XA patent/CN109773136B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3626994C1 (en) * | 1986-08-08 | 1987-12-10 | Joachim Dipl-Ing Laempe | Shooting device on a core shooter |
| CN102601318A (en) * | 2011-12-15 | 2012-07-25 | 宁夏共享集团有限责任公司 | Casting method for thin-wall annular cast |
| CN102626769A (en) * | 2012-04-10 | 2012-08-08 | 遵义拓特铸锻有限公司 | Manufacturing process of pump body casting of super duplex stainless steel centrifugal pump |
| CN103962511A (en) * | 2014-05-13 | 2014-08-06 | 淄博华成泵业有限公司 | Manufacturing method of integral impeller sand core |
| CN105945231A (en) * | 2016-06-02 | 2016-09-21 | 共享装备股份有限公司 | Core drifting-prevention and bending-resistance arbor for volute type casting sand core |
| CN107052237A (en) * | 2017-06-09 | 2017-08-18 | 安徽全柴天和机械有限公司 | A kind of core box structure for preparing diesel engine integral sand core |
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| Publication number | Publication date |
|---|---|
| CN109773136B (en) | 2020-07-17 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A method to prevent small channel sand core cracking in pump body castings Granted publication date: 20200717 Pledgee: Industrial and Commercial Bank of China Limited Huoshan Branch Pledgor: ANHUI YINGLIU GROUP HUOSHAN CASTING CO.,LTD. Registration number: Y2024980024675 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |