CN110576175A - Production process for chemical castings - Google Patents
Production process for chemical castings Download PDFInfo
- Publication number
- CN110576175A CN110576175A CN201910935328.5A CN201910935328A CN110576175A CN 110576175 A CN110576175 A CN 110576175A CN 201910935328 A CN201910935328 A CN 201910935328A CN 110576175 A CN110576175 A CN 110576175A
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- CN
- China
- Prior art keywords
- casting
- production
- molding
- chemical
- castings
- 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.)
- Pending
Links
- 238000005266 casting Methods 0.000 title claims abstract description 121
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 44
- 239000000126 substance Substances 0.000 title claims abstract description 26
- 238000002844 melting Methods 0.000 claims abstract description 27
- 230000008018 melting Effects 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 24
- 230000008569 process Effects 0.000 claims abstract description 21
- 238000002360 preparation method Methods 0.000 claims abstract description 11
- 238000004140 cleaning Methods 0.000 claims abstract description 10
- 238000010586 diagram Methods 0.000 claims abstract description 10
- 238000007689 inspection Methods 0.000 claims abstract description 3
- 238000000465 moulding Methods 0.000 claims description 27
- 239000004576 sand Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 17
- 244000035744 Hura crepitans Species 0.000 claims description 8
- 230000009471 action Effects 0.000 claims description 8
- 230000005484 gravity Effects 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 239000007769 metal material Substances 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000005520 cutting process Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 description 9
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000007788 liquid Substances 0.000 description 3
- 239000003110 molding sand Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000002054 inoculum Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000019198 oils Nutrition 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D47/00—Casting plants
- B22D47/02—Casting plants for both moulding and casting
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a production process for chemical castings, which relates to the field of casting production processes and comprises production process preparation, production preparation, modeling and core making, melting and pouring, shakeout cleaning and casting inspection, wherein the production process preparation comprises a production part diagram, a production process scheme, a process file and a drawn casting process diagram. The casting can be free from the limitation of metal materials, size and weight, various blanks with complex shapes can be produced by casting, the casting process is particularly suitable for producing part blanks with complex inner cavities, such as various box bodies, cylinder bodies, blades, impellers and the like, the shapes and the sizes of the castings can be very close to those of the parts, metal materials are saved, cutting processing time is saved, the sources of raw materials generally used by the castings are wide, the casting cost is low, the casting process is flexible, the production rate is high, the casting process can be manually produced and also can be mechanically produced, and the better use prospect is brought.
Description
Technical Field
The invention relates to the field of casting production processes, in particular to a production process for chemical castings.
background
the casting is generally used as a blank and is machined into parts, and the casting production is a metal forming method which heats and melts metal to make the metal have fluidity, then pours the metal into a casting mold cavity with a certain shape, fills the mold cavity under the action of gravity or external force, cools and solidifies the metal into the casting.
Disclosure of Invention
the invention mainly aims to provide a production process for chemical castings, which is flexible in casting process and high in productivity.
in order to achieve the purpose, the invention adopts the technical scheme that:
A production process for chemical castings comprises production process preparation, production preparation, modeling and core making, melting and pouring, shakeout cleaning and casting inspection.
further, the production process preparation comprises a produced part drawing, a production process scheme, a process file and a drawn casting process drawing.
Further, the production preparation includes melting material, molding material, pattern and core box.
furthermore, the molding and core making comprises hand molding and machine molding, and the hand molding comprises whole mold molding, split mold molding, movable mold molding and sand digging molding.
further, the method comprises the following specific steps:
(1) looking up a drawing file of a chemical casting to be processed, a process scheme and a process file required by production, and further drawing a casting process diagram;
(2) Preparing materials for melting and core making prepared in the casting process, and technological equipment such as a pattern, a core box, a sand box and the like used by a corresponding casting;
(3) Determining a used molding and core making mode according to the casting requirement;
(4) Melting the melting material by heating to make it have fluidity, pouring into a casting mold cavity with a certain shape, and filling the mold cavity under the action of gravity or external force (pressure, centrifugal force, electromagnetic force, etc.);
(5) Cooling and solidifying the mixture into a casting;
(6) and cleaning the shakeout produced by the casting sand and inspecting the cast chemical castings.
Compared with the prior art, the invention has the following beneficial effects: the casting can be free from the limitation of metal materials, size and weight, various blanks with complex shapes can be produced by casting, the casting is particularly suitable for producing part blanks with complex inner cavities, such as various box bodies, cylinder bodies, blades, impellers and the like, the shapes and the sizes of the castings can be very close to those of the parts, metal materials are saved, cutting processing time is saved, the sources of raw materials generally used by the castings are wide, the casting cost is low, the casting process is flexible, the production rate is high, and the casting can be produced manually or mechanically.
Drawings
FIG. 1 is a process flow diagram for a chemical casting production process of the present invention.
Detailed Description
in order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easily understood, the invention is further described below with reference to the specific embodiments and the attached drawings, but the following embodiments are only the preferred embodiments of the invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention.
specific embodiments of the present invention are described below with reference to the accompanying drawings.
the first embodiment is as follows:
(1) looking up a drawing file of a chemical casting to be processed, a process scheme and a process file required by production, and further drawing a casting process diagram;
(2) preparing materials for melting and core making prepared in the casting process, and technological equipment such as a pattern, a core box, a sand box and the like used by a corresponding casting;
(3) The casting with simple shape, plane end and largest section is molded by a whole mould in manual molding, and the whole mould is completely placed in a sand box during molding, so that the defect of wrong boxes is avoided;
(4) Melting the melting material by heating to make it have fluidity, pouring into a casting mold cavity with a certain shape, and filling the mold cavity under the action of gravity or external force (pressure, centrifugal force, electromagnetic force, etc.);
(5) cooling and solidifying the mixture into a casting;
(6) And cleaning the shakeout produced by the casting sand and inspecting the cast chemical castings.
the second embodiment is as follows:
(1) looking up a drawing file of a chemical casting to be processed, a process scheme and a process file required by production, and further drawing a casting process diagram;
(2) Preparing materials for melting and core making prepared in the casting process, and technological equipment such as a pattern, a core box, a sand box and the like used by a corresponding casting;
(3) When the maximum section of the casting is not at the end part of the casting, in order to facilitate molding and stripping, when the pattern is divided into two halves or a plurality of parts, the split mold molding in manual molding is adopted, when the maximum section of the casting is in the middle of the casting, two boxes of split mold molding are adopted, and the pattern is divided into two halves from the maximum section; when the shape of the casting is that the cross sections of the two ends are large and the middle cross section is small, three-box split molding is adopted, the split surface is selected at the minimum cross section of the mold sample, and the parting surface is selected at the maximum cross section of the two ends of the casting;
(4) melting the melting material by heating to make it have fluidity, pouring into a casting mold cavity with a certain shape, and filling the mold cavity under the action of gravity or external force (pressure, centrifugal force, electromagnetic force, etc.);
(5) cooling and solidifying the mixture into a casting;
(6) and cleaning the shakeout produced by the casting sand and inspecting the cast chemical castings.
the third concrete embodiment:
(1) Looking up a drawing file of a chemical casting to be processed, a process scheme and a process file required by production, and further drawing a casting process diagram;
(2) Preparing materials for melting and core making prepared in the casting process, and technological equipment such as a pattern, a core box, a sand box and the like used by a corresponding casting;
(3) the method is characterized in that a part of a casting which hinders stripping is made into a loose piece, the loose piece and a pattern main body form detachable connection by a pin or a dovetail structure, the loose piece is a loose piece model in manual modeling, the pattern main body is taken out when the pattern is stripped, the loose piece is still left in a casting mold, and the loose piece is taken out from the side surface after the pattern is stripped;
(4) melting the melting material by heating to make it have fluidity, pouring into a casting mold cavity with a certain shape, and filling the mold cavity under the action of gravity or external force (pressure, centrifugal force, electromagnetic force, etc.);
(5) cooling and solidifying the mixture into a casting;
(6) And cleaning the shakeout produced by the casting sand and inspecting the cast chemical castings.
the fourth concrete embodiment:
(1) looking up a drawing file of a chemical casting to be processed, a process scheme and a process file required by production, and further drawing a casting process diagram;
(2) preparing materials for melting and core making prepared in the casting process, and technological equipment such as a pattern, a core box, a sand box and the like used by a corresponding casting;
(3) When the external contour of the casting is a curved surface, the maximum section of the casting is not at the end part, and the pattern is not suitable to be divided into two halves, the pattern is made into a whole, parting sand which hinders the taking out of the pattern is dug during modeling, the parting surface is a curved surface, and the sand must be dug to the maximum section of the pattern in order to ensure smooth stripping during modeling;
(4) Melting the melting material by heating to make it have fluidity, pouring into a casting mold cavity with a certain shape, and filling the mold cavity under the action of gravity or external force (pressure, centrifugal force, electromagnetic force, etc.);
(5) Cooling and solidifying the mixture into a casting;
(6) and cleaning the shakeout produced by the casting sand and inspecting the cast chemical castings.
the fifth concrete embodiment:
(1) Looking up a drawing file of a chemical casting to be processed, a process scheme and a process file required by production, and further drawing a casting process diagram;
(2) Preparing materials for melting and core making prepared in the casting process, and technological equipment such as a pattern, a core box, a sand box and the like used by a corresponding casting;
(3) Aiming at the casting with large production capacity and regular end surface, the machine modeling is adopted;
(4) melting the melting material by heating to make it have fluidity, pouring into a casting mold cavity with a certain shape, and filling the mold cavity under the action of gravity or external force (pressure, centrifugal force, electromagnetic force, etc.);
(5) cooling and solidifying the mixture into a casting;
(6) and cleaning the shakeout produced by the casting sand and inspecting the cast chemical castings.
the raw materials that the psammitolite used in this application are the molding sand, and the performance requirement of molding sand has intensity, gas permeability, fire resistance, deformability, mobility, compact rate and collapsibility etc. and the molding sand comprises former sand, binder and addition, and former sand requires that the mud content is few. Sea sand, river sand or mountain sand with uniform particles and round and polygonal shapes, and the binder can be clay, sodium silicate sand, resin, synthetic fat oil, vegetable oil and the like.
the pattern is used for forming the external contour of the casting, the core box is used for manufacturing the sand core and forming the internal contour of the casting, and the pattern and the core box are respectively used for manufacturing the casting mold and the core during molding.
in the production, the principle of high-temperature tapping and low-temperature pouring is followed during pouring, because the tapping temperature of the molten metal is improved, the thorough melting of inclusions and the floating of molten slag are facilitated, the slag removal and the degassing are facilitated, and the defects of slag inclusion and pores of castings are reduced.
(1) The inoculant, nodulizer and the like for casting ladle, casting tool, stokehole treatment are fully dried before use and can be used after being dried;
(2) Pouring personnel need to wear the work clothes and wear the protective glasses according to the requirements, the work place is smooth and unobstructed, and the metal liquid in the pouring ladle is not too full so as to avoid hurting people when the metal liquid is conveyed and poured;
(3) the pouring speed is correctly selected, namely, the pouring is slowly carried out at the beginning, so that the pouring is conveniently aligned to a pouring gate, the impact of molten metal on a sand mold is reduced, the gas is favorably discharged, then, the pouring is quickly carried out to prevent cold shut, and the pouring is slowly carried out before the pouring is fully carried out, namely, the slow, fast and slow principles are followed;
(4) for castings with large liquid shrinkage and solidification shrinkage, such as medium and large steel castings, timely re-pouring from a pouring gate or a riser after pouring;
(5) when pouring, the gas emitted from the casting mould should be ignited in time to smooth the air so as to prevent the air holes from being generated due to the air-holding of the casting mould and the damage to human health and the air pollution caused by the incomplete combustion of the gas.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A production process for chemical castings comprises production process preparation, production preparation, modeling and core making, melting and pouring, shakeout cleaning and casting inspection.
2. a process for the production of chemical castings according to claim 1, wherein: the production process preparation comprises the steps of production part drawing, production process scheme, process file and drawing casting process drawing.
3. A process for the production of chemical castings according to claim 1, wherein: the production preparation comprises melting materials, molding and core-making materials, a pattern and a core box.
4. A process for the production of chemical castings according to claim 1, wherein: the molding and core making comprises manual molding and machine molding, and the manual molding comprises whole mold molding, split mold molding, movable mold molding and sand digging molding.
5. A production process for chemical castings according to claims 1-4, characterized by comprising the following specific steps:
(1) looking up a drawing file of a chemical casting to be processed, a process scheme and a process file required by production, and further drawing a casting process diagram;
(2) preparing materials for melting and core making prepared in the casting process, and technological equipment such as a pattern, a core box, a sand box and the like used by a corresponding casting;
(3) determining a used molding and core making mode according to the casting requirement;
(4) melting the melting material by heating to make it have fluidity, pouring into a casting mold cavity with a certain shape, and filling the mold cavity under the action of gravity or external force (pressure, centrifugal force, electromagnetic force, etc.);
(5) cooling and solidifying the mixture into a casting;
(6) And cleaning the shakeout produced by the casting sand and inspecting the cast chemical castings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910935328.5A CN110576175A (en) | 2019-09-29 | 2019-09-29 | Production process for chemical castings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910935328.5A CN110576175A (en) | 2019-09-29 | 2019-09-29 | Production process for chemical castings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110576175A true CN110576175A (en) | 2019-12-17 |
Family
ID=68814034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910935328.5A Pending CN110576175A (en) | 2019-09-29 | 2019-09-29 | Production process for chemical castings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110576175A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102218505A (en) * | 2011-07-08 | 2011-10-19 | 嘉禾县众合铸业有限公司 | Precise casting technology for green sand vacuum sealing model |
| CN105014061A (en) * | 2014-04-16 | 2015-11-04 | 繁昌县金牛机械铸造有限责任公司 | Novel casting technology |
| CN105506468A (en) * | 2015-12-21 | 2016-04-20 | 宁波金汇精密铸造有限公司 | Preparation method of buffer |
| CN105562618A (en) * | 2015-12-21 | 2016-05-11 | 宁波金汇精密铸造有限公司 | Manufacturing method of brake disc |
| CN106180579A (en) * | 2016-07-15 | 2016-12-07 | 杭州汽轮铸锻有限公司 | A kind of casting mold method for rapid cooling |
-
2019
- 2019-09-29 CN CN201910935328.5A patent/CN110576175A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102218505A (en) * | 2011-07-08 | 2011-10-19 | 嘉禾县众合铸业有限公司 | Precise casting technology for green sand vacuum sealing model |
| CN105014061A (en) * | 2014-04-16 | 2015-11-04 | 繁昌县金牛机械铸造有限责任公司 | Novel casting technology |
| CN105506468A (en) * | 2015-12-21 | 2016-04-20 | 宁波金汇精密铸造有限公司 | Preparation method of buffer |
| CN105562618A (en) * | 2015-12-21 | 2016-05-11 | 宁波金汇精密铸造有限公司 | Manufacturing method of brake disc |
| CN106180579A (en) * | 2016-07-15 | 2016-12-07 | 杭州汽轮铸锻有限公司 | A kind of casting mold method for rapid cooling |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191217 |
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| RJ01 | Rejection of invention patent application after publication |