CN110695338A - Process method for casting thin-wall casting at low pressure - Google Patents
Process method for casting thin-wall casting at low pressure Download PDFInfo
- Publication number
- CN110695338A CN110695338A CN201810749432.0A CN201810749432A CN110695338A CN 110695338 A CN110695338 A CN 110695338A CN 201810749432 A CN201810749432 A CN 201810749432A CN 110695338 A CN110695338 A CN 110695338A
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- China
- Prior art keywords
- casting
- core
- riser
- low pressure
- research
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- Pending
Links
- 238000005266 casting Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 34
- 239000004576 sand Substances 0.000 claims description 15
- 239000007769 metal material Substances 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims 1
- 238000012827 research and development Methods 0.000 abstract description 16
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- 238000005516 engineering process Methods 0.000 abstract description 6
- 239000000654 additive Substances 0.000 abstract description 4
- 230000000996 additive effect Effects 0.000 abstract description 4
- 238000009966 trimming Methods 0.000 abstract description 4
- 238000004904 shortening Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention relates to the technical field of casting, in particular to a process method for casting a thin-wall casting at low pressure, which comprises the following process steps of a1, establishing a three-dimensional model of the casting in three-dimensional software according to a two-dimensional drawing of a product; a2, arranging a gating system and risers on the three-dimensional model of the casting according to the process requirements. The invention has the advantages of solving the problems of long research and development period and high research and development cost caused by continuous trimming or new manufacturing of a mould due to continuous adjustment of a product structure in the research and development period of a product, shortening the research and development period, and avoiding the problems of large quantity of sand cores, high core assembly difficulty and low precision caused by core splitting and/or parting according to the product structure by adopting an additive manufacturing technology. According to the invention, the universal pouring base is arranged, so that the production efficiency is improved, and the production cost is reduced. Through adopting the mode of core integral type somatotype, avoided the core assembling process of non-planar structure, reduced the operation degree of difficulty of core assembling process, also promoted the precision of group's type, promoted technology yield.
Description
Technical Field
The invention relates to the technical field of casting, in particular to a process method for casting a thin-wall casting at low pressure.
Background
In the process of molding large-size thin-wall castings, the large-size thin-wall castings are mostly molded and produced by adopting a mold process, the castings are split along the maximum section of the castings, the outer contours are taken out by the molds, the inner cavity structure is formed by a sand core, and the inner cavity sand core is formed by a wood core box. In addition, in the product research and development period, the mold needs to be frequently modified due to product structure modification or casting process adjustment, so that the research and development cost is high and the period is long. Meanwhile, in the core assembling process, the core assembling precision is generally controlled by combining a special clamp with manual measurement, and the operation difficulty is high. The sand core manufactured by the existing core manufacturing and molding process is various, the core assembling mode is complex, the process control requirement is complex, and the requirement on the skill level of field workers is high. Meanwhile, the size of the product is difficult to control, resulting in large size error.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a process method which solves the problems of long research and development period and high research and development cost caused by continuous trimming or new manufacturing of a mould due to continuous adjustment of a product structure in a product research and development period, and simultaneously avoids the problems of large quantity of sand cores, high core assembly difficulty and low precision caused by core splitting and/or parting according to the product structure by adopting an additive manufacturing technology.
In order to achieve the aim, the invention provides a process method for casting a thin-wall casting at low pressure, which comprises the following process steps:
a. establishing a three-dimensional model of the casting, arranging a gating system and a riser on the three-dimensional model, and obtaining a core body of the casting by calculating differences among the three-dimensional model of the casting, the gating system and the riser on the premise of minimum sand consumption;
b. and splitting and parting the casting core body, splitting the casting core body into an inner cavity sand core for forming a casting inner cavity structure, an outer sand mold for forming a casting outer shape structure and a riser sand mold for accommodating a riser, and arranging a riser seat and a sprue seat at corresponding positions on the outer surface.
Preferably, the gating system is made of metal materials resistant to high temperature of more than 900 ℃.
Preferably, the bottom plate of the pouring system is a round or square flat plate with a liquid lifting pipe in the middle.
Preferably, snap fasteners for positioning and fixing are arranged on the matching surfaces of the inner cavity sand core, the exterior sand mold and the riser sand mold.
The invention has the advantages of solving the problems of long research and development period and high research and development cost caused by continuous trimming or new manufacturing of a mould due to continuous adjustment of a product structure in the research and development period of a product, shortening the research and development period, and avoiding the problems of large quantity of sand cores, high core assembly difficulty and low precision caused by core splitting and/or parting according to the product structure by adopting an additive manufacturing technology. According to the invention, the universal pouring base is arranged, so that the production efficiency is improved, and the production cost is reduced. Through adopting the mode of core integral type somatotype, avoided the core assembling process of non-planar structure, reduced the operation degree of difficulty of core assembling process, also promoted the precision of group's type, promoted technology yield.
Detailed Description
Example 1:
the invention aims to overcome the defects of the prior art, and provides a process method which solves the problems of long research and development period and high research and development cost caused by continuous trimming or new manufacturing of a mould due to continuous adjustment of a product structure in a product research and development period, and simultaneously avoids the problems of large quantity of sand cores, high core assembly difficulty and low precision caused by core splitting and/or parting according to the product structure by adopting an additive manufacturing technology.
In order to achieve the aim, the invention provides a process method for casting a thin-wall casting at low pressure, which is characterized by comprising the following process steps:
a. establishing a three-dimensional model of the casting, arranging a gating system and a riser on the three-dimensional model, and obtaining a core body of the casting by calculating differences among the three-dimensional model of the casting, the gating system and the riser on the premise of minimum sand consumption;
b. and splitting and parting the casting core body, splitting the casting core body into an inner cavity sand core for forming a casting inner cavity structure, an outer sand mold for forming a casting outer shape structure and a riser sand mold for accommodating a riser, and arranging a riser seat and a sprue seat at corresponding positions on the outer surface.
The pouring system is made of metal materials resistant to high temperature of more than 900 ℃.
The bottom plate of the pouring system is a round or square flat plate with a liquid lifting pipe in the middle.
And the matching surfaces of the inner cavity sand core, the exterior sand mold and the riser sand mold are provided with snap fasteners for positioning and fixing.
While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, but is capable of numerous equivalents and substitutions, all of which are within the scope of the invention as defined by the appended claims.
Claims (4)
1. A process method for casting a thin-wall casting at low pressure is characterized by comprising the following process steps:
a. establishing a three-dimensional model of the casting, arranging a gating system and a riser on the three-dimensional model, and obtaining a core body of the casting by calculating differences among the three-dimensional model of the casting, the gating system and the riser on the premise of minimum sand consumption;
b. and splitting and parting the casting core body, splitting the casting core body into an inner cavity sand core for forming a casting inner cavity structure, an outer sand mold for forming a casting outer shape structure and a riser sand mold for accommodating a riser, and arranging a riser seat and a sprue seat at corresponding positions on the outer surface.
2. The process for low pressure casting of thin walled castings according to claim 1, wherein the gating system is made of a metallic material that is resistant to high temperatures above 900 ℃.
3. The process for low pressure casting of thin walled castings according to claim 1, wherein the bottom plate of the gating system is a round or square flat plate with a riser tube in the middle.
4. The process for low pressure casting of thin walled castings according to claim 1, wherein snap fasteners for positioning and securing are provided on the mating surfaces of the cavity sand core, the profile sand mold and the riser sand mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810749432.0A CN110695338A (en) | 2018-07-10 | 2018-07-10 | Process method for casting thin-wall casting at low pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810749432.0A CN110695338A (en) | 2018-07-10 | 2018-07-10 | Process method for casting thin-wall casting at low pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110695338A true CN110695338A (en) | 2020-01-17 |
Family
ID=69192222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810749432.0A Pending CN110695338A (en) | 2018-07-10 | 2018-07-10 | Process method for casting thin-wall casting at low pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110695338A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2170858A1 (en) * | 1995-03-03 | 1996-09-04 | Yuji Okada | Casting Method with Improved Resin Core Removal Step |
| CA2382962A1 (en) * | 2001-06-11 | 2002-12-11 | General Motors Corporation | Engine block mold package with single exterior parting line |
| CN102941333A (en) * | 2012-10-12 | 2013-02-27 | 南阳市汇森精密仪器铸造有限公司 | Method for producing ultrahigh pressure switch pressure-bearing aluminum alloy tanks under low pressure through V method |
| CN104511585A (en) * | 2013-09-27 | 2015-04-15 | 苏州三基铸造装备股份有限公司 | Extrusion casting mould for automobile clutch housing |
| CN108057873A (en) * | 2018-01-26 | 2018-05-22 | 共享智能铸造产业创新中心有限公司 | Process method of low-pressure casting thin-walled aluminum alloy castings |
-
2018
- 2018-07-10 CN CN201810749432.0A patent/CN110695338A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2170858A1 (en) * | 1995-03-03 | 1996-09-04 | Yuji Okada | Casting Method with Improved Resin Core Removal Step |
| CA2382962A1 (en) * | 2001-06-11 | 2002-12-11 | General Motors Corporation | Engine block mold package with single exterior parting line |
| CN102941333A (en) * | 2012-10-12 | 2013-02-27 | 南阳市汇森精密仪器铸造有限公司 | Method for producing ultrahigh pressure switch pressure-bearing aluminum alloy tanks under low pressure through V method |
| CN104511585A (en) * | 2013-09-27 | 2015-04-15 | 苏州三基铸造装备股份有限公司 | Extrusion casting mould for automobile clutch housing |
| CN108057873A (en) * | 2018-01-26 | 2018-05-22 | 共享智能铸造产业创新中心有限公司 | Process method of low-pressure casting thin-walled aluminum alloy castings |
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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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200117 |