CN111618246A - Casting production method of large nodular cast iron grinding disc with cavity - Google Patents
Casting production method of large nodular cast iron grinding disc with cavity Download PDFInfo
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- CN111618246A CN111618246A CN202010546686.XA CN202010546686A CN111618246A CN 111618246 A CN111618246 A CN 111618246A CN 202010546686 A CN202010546686 A CN 202010546686A CN 111618246 A CN111618246 A CN 111618246A
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- 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
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- 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
Abstract
The invention provides a casting production method of a large nodular cast iron grinding disc with a cavity. According to the method, a first layer of sand box is divided into 2 parts according to the height during molding, after the production of a lower mold is finished, the sand boxes are disassembled layer by layer to lift the second part of molds, the first part of molds are turned over to produce an upper mold, after the production of the upper mold is finished, the sand boxes are recombined, the sand cores are lifted into a casting mold again, and finally molten iron is cast.
Description
Technical Field
The invention relates to the technical field of casting, in particular to a casting production method of a large nodular cast iron grinding disc with a cavity.
Background
At present, the domestic manufacturers of large millstones only have 2-3 manufacturers, millstones of other companies adopt a casting large end positioned in a lower mould and an upper mould and a lower mould to be molded separately, and the production method has the main defects as follows:
1. 2 parts of moulds such as an upper mould and a lower mould are required to be manufactured, the moulds are provided with mould plates, and the manufacturing cost of the moulds is high;
2. the large end of the casting is positioned in the lower mold, so that most of molten iron in the cavity is positioned in the lower mold, the fire running risk is easy to occur, the sand consumption is increased to avoid the fire running, the sand consumption of the casting is large, and the production cost is high;
3. the sand core of the casting weight reduction cavity is positioned in the lower die and needs to be fixed on the lower die by using bolts, the whole sand core is wrapped by molten iron, gas in the sand core cannot be discharged out of the die cavity during pouring, and the gas enters the molten iron to easily form air holes; meanwhile, the sand core is easy to float under the buoyancy of molten iron, and the wall thickness of the casting is smaller.
Therefore, a casting production method of the large nodular cast iron grinding disc with the cavity needs to be designed.
Disclosure of Invention
According to the technical problems that the traditional casting method is easy to break out and the position of a sand core is easy to move, the casting production method of the large nodular cast iron millstone with the cavity is provided. The sand core is placed in the upper mold by mainly dividing the mold into two parts, so that the problems of fire escape and upward floating of the sand core are effectively solved.
The technical means adopted by the invention are as follows:
a casting production method of a large nodular cast iron millstone with a cavity is characterized by comprising the following steps:
step S1: the model is manufactured by adopting a real sample, a casting mould is divided into 2 parts including a mould I and a mould II, and the mould dividing height is determined according to the height of a first layer of sand box during moulding;
step S2: placing the mould I on a platform, placing a first sand box, a cold iron, a hanging handle and a pouring gate, starting a sand mixer to sand layer by layer along the periphery of the mould, and then leveling along the upper plane of the sand box;
step S3: after the first layer of molding sand is hardened, the mold II is placed on the mold I, the sand mixer is started to flow sand layer by layer along the periphery of the mold after each layer of molding sand is placed, and the next layer of sand box is placed after the molding sand is hardened until the lower mold is manufactured;
step S4: after the sand of the lower mold is hardened, lifting each layer of sand mold layer by layer and turning over, taking out the mold II, then turning over the first layer of sand box and the mold I together, and placing the first layer of sand box and the mold I on a sizing block;
step S5: cold iron, a riser and a pouring gate are placed on the first sand box and the mould I, then an upper molding sand box is placed, and the sand mixer is started to flow sand layer by layer along the periphery of the mould until the upper mold is manufactured;
step S6: placing the core box I on a platform, placing a chilling block, starting the sand mixer to sand layer by layer along the periphery of the mould to obtain a sand core I;
step S7: placing the core box II on a platform, placing a chilling block, starting the sand mixer to sand layer by layer along the periphery of the mould to obtain a sand core II;
step S8: placing a core box III on a platform, placing a chilling block, starting the sand mixer to flow sand layer by layer along the periphery of the mould, placing a lifting ring on the core box III, winding an air outlet rope on the lifting ring so that gas in the sand core is led out of a cavity during casting to avoid air holes and obtain a sand core III, and placing a ceramic pipe on the core head of the sand core III;
step S9: stacking each layer of the sand boxes of the lower mold together;
step S10: hoisting the sand core I into the lower mold according to the core head cutting angle positioning;
step S11: lifting the sand core II into a lower mold, and aligning the sand core I and the sand core II by taking the semicircular bosses carried by the sand core I and the sand core II as references;
step S12: placing the cope on an iron stand;
step S13: hang with the lifting hook on the rings to pass with the iron wire rings, the iron wire is hung on the crane will psammitolite III is placed on the small handcart, utilizes the small handcart will psammitolite III pushes away below the cope match-plate pattern, and the iron wire passes ceramic pipe, later the iron wire is hung will on the crane psammitolite III hangs, treat psammitolite III places the back in place, will place the gasket on the lifting hook, then will with the nut the lifting hook is fixed tightly. Sequentially hoisting and fixing each sand core III into the upper mold according to the steps;
step S14: 50mm is reserved between every two (2) sand cores III, after the sand cores III are lifted, the 50mm sand cores are filled with resin sand, and after the sand is hardened, the sand is brushed;
step S15: hanging the upper mold into the lower mold to test the box;
step S16: placing a gate box on the cope;
step S17: and melting molten iron by using an electric furnace, turning the spheroidized molten iron into casting ladles with corresponding quantity, then sequentially turning into the pouring gate boxes, measuring the temperature, and carrying out plug-pulling pouring after the pouring temperature is reached. And opening the box after the in-mold temperature is reduced to below 300 ℃ after pouring, and taking out the casting.
Further, the thickness of each layer of sand of the sand mixer is 200mm when the sand flows layer by layer, and the diameter of the ceramic tube is 100 mm.
Further, the gaps of the chilling blocks are compacted by using wood plates.
Further, the molten iron comprises the following components: c: 3.75-3.85, Si: 1.43-1.48, Mn < 0.25, P < 0.04, and S < 0.025.
Compared with the prior art, the invention has the following advantages:
1. according to the casting production method of the large nodular cast iron millstone with the cavity, the mould is designed in a full pattern, the mould is divided into 2 parts according to the height of a first layer of sand box during moulding, after the lower mould is produced, the second part of mould is lifted away, and the first part of mould is turned over to produce the upper mould, so that the manufacture of the upper mould and the shaping plate is cancelled, and the mould production cost is reduced.
2. According to the casting production method of the large nodular cast iron millstone with the cavity, the large end of the casting is positioned in the upper mold, the small end of the casting is positioned in the lower mold, most of molten iron in the cavity is positioned in the upper mold, the sand eating amount at the small end is large, the gravity action of the molten iron at the upper end can be borne, the fire running risk is avoided, the sand eating amount at the large end of the casting is not increased for preventing the fire running, the sand consumption is reduced, and the production cost is reduced.
3. According to the casting production method of the large nodular cast iron millstone with the cavity, the sand core of the casting weight reduction cavity is hung to the upper mold through the bolt, gas in the sand core can be led out of the mold through the gas outlet rope, so that gas holes are avoided, meanwhile, the sand core of the weight reduction cavity is communicated with the upper mold, and the sand core cannot sink under the buoyancy effect of molten iron to cause wall thickness deviation.
In conclusion, the technical scheme of the invention is applied to solve the problems of air holes, fire leakage and sand core displacement by dividing the mould into two parts and turning the mould of the first part to produce the upper mould so that the mould is positioned in the upper mould. Therefore, the technical scheme of the invention solves the problems of air holes, fire running and sand core displacement during casting in the prior art.
For the reasons, the invention can be widely popularized in the fields of casting technology and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a die I of the casting production method of a large nodular cast iron millstone with a cavity.
FIG. 2 is a schematic diagram of a die II of the casting production method of the large nodular cast iron millstone with the cavity.
Fig. 3 is a schematic diagram of a core box I of the casting production method of the large nodular cast iron millstone with the cavity.
Fig. 4 is a schematic diagram of a core box II of the casting production method of the large nodular cast iron millstone with the cavity.
FIG. 5 is a schematic diagram of a core box III of the casting production method of a large nodular cast iron grinding disc with a cavity
Fig. 6 is a schematic view of the lower mold of the casting production method of the large nodular cast iron millstone with the chamber.
Fig. 7 is a schematic diagram of a sand core I of the casting production method of the large nodular cast iron millstone with the cavity.
Fig. 8 is a schematic diagram of a sand core II of the casting production method of the large nodular cast iron millstone with the cavity.
FIG. 9 is a schematic view of the upper mold of the casting production method of the large nodular cast iron millstone with the chamber.
Fig. 10 is a schematic diagram of a sand core iii of the casting production method of the large nodular cast iron millstone with the chamber.
FIG. 11 is a schematic view of a hook of the casting production method of a large nodular cast iron millstone with a chamber.
Fig. 12 is a schematic view of the assembly of a sand core iii in the casting production method of the large nodular cast iron millstone with the chamber.
FIG. 13 is a schematic view of the die assembly of the casting production method of the large nodular cast iron millstone with the cavity.
In the figure: 1. a mould I; 2. a mould II; 3. a core box I; 4. a core box II; 5. a core box III; 6. molding; 7. a sand core I; 8. a sand core II; 9. molding; 10. a sand core III; 11. and (4) a lifting hook.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1-10, a casting production method of a large nodular cast iron grinding disc with a cavity is provided, and the production method comprises the following steps:
step S1: the model is manufactured by adopting a real sample, the casting mould is divided into 2 parts comprising a mould I1 and a mould II 2, and the mould dividing height is determined according to the height of a first layer of sand box during moulding;
step S2: placing the mold I1 on a platform, placing a first sand box, a chill, a hanging handle and a pouring gate, starting a sand mixer to sand flow layer by layer along the periphery of the mold, and then leveling along the upper plane of the sand box;
step S3: after the first layer of molding sand is hardened, the mold II 2 is placed on the mold I1, the sand mixer is started to flow sand layer by layer along the periphery of the mold after each layer of molding sand is placed, and the next layer of sand box is placed after the molding sand is hardened until the lower mold 6 is manufactured;
step S4: after the sand of the lower mold 6 is hardened, lifting each layer of sand mold layer by layer and turning, taking out the mold II 2, then turning the first layer of sand box and the mold I1 together, and placing the first layer of sand box and the mold I1 on a sizing block;
step S5: a chill, a riser and a pouring gate are placed on the first sand box and the mould I1, then an upper molding sand box is placed, and the sand mixer is started to flow sand layer by layer along the periphery of the mould until the upper mold 9 is manufactured;
step S6: placing a core box I3 on a platform, placing a chilling block, starting the sand mixer to sand layer by layer along the periphery of the mould, and obtaining a sand core I7;
step S7: placing the core box II 4 on a platform, placing a chilling block, starting the sand mixer to sand layer by layer along the periphery of the mould to obtain a sand core II 8;
step S8: placing a core box III 5 on a platform, placing a chilling block, starting the sand mixer to sand layer by layer along the periphery of the mould, placing a lifting ring on the core box III 5, winding an air outlet rope on the lifting ring so that gas in the sand core is led out of a cavity during casting to avoid air holes, obtaining a sand core III 10, and placing a ceramic pipe on the core head of the sand core III 10;
step S9: stacking each layer of the sand boxes of the lower mold 6;
step S10: the sand core I7 is positioned and hung into the lower mold 6 according to the core head cutting angle;
step S11: lifting the sand core II 8 into a lower mold 6, and aligning the sand core I7 with the sand core II 8 by taking the semicircular bosses carried by the sand core I7 and the sand core II 8 as references;
step S12: placing the upper mold 9 on an iron stand;
step S13: hang with lifting hook 11 on the rings to pass with the iron wire rings, the iron wire is hung on the crane will psammitolite III 10 is placed on the small handcart, utilizes the small handcart will psammitolite III 10 pushes away below the cope match-plate pattern 9, the iron wire passes the ceramic tube, later the iron wire is hung will on the crane psammitolite III 10 lifts by crane, treats psammitolite III 10 places the back in place, will place the gasket on the lifting hook 11, then will with the nut lifting hook 11 is fixed tightly. According to the steps, each sand core III 10 is hung into the upper mold 9 and fixed;
step S14: 50mm is reserved between every 2 sand cores III 10, after the sand cores III 10 are lifted, the 50mm are filled and leveled by resin sand, and after the sand is hardened, the sand is brushed;
step S15: hanging the upper mold 9 into the lower mold 6 for box inspection;
step S16: placing a sprue box on the cope 6;
step S17: and melting molten iron by using an electric furnace, turning the spheroidized molten iron into casting ladles with corresponding quantity, then sequentially turning into the pouring gate boxes, measuring the temperature, and carrying out plug-pulling pouring after the pouring temperature is reached. Opening the box after the in-mold temperature is reduced to below 300 ℃ after pouring, and taking out the casting;
the thickness of each layer of grit is 200mm when the sand mixer is in the successive layer quicksand, the diameter of ceramic pipe is 100mm, the clearance of chill uses the plank to carry out the compaction, the composition in the molten iron is: c: 3.75-3.85, Si: 1.43-1.48, Mn < 0.25, P < 0.04, and S < 0.025.
Example 1
As shown in fig. 1-10, a casting production method of a large nodular cast iron grinding disc with a cavity is provided, and the production method comprises the following steps:
step S1: the model is manufactured by adopting a real sample, the casting mould is divided into 2 parts comprising a mould I1 and a mould II 2, and the mould dividing height is determined according to the height of a first layer of sand box during moulding;
step S2: placing the mold I1 on a platform, placing a first sand box, a chill, a hanging handle and a pouring channel, compacting the clearance of the chill by using a wood plate, starting a sand mixer to sand layer by layer along the periphery of the mold, wherein the thickness of each layer of sand is 200mm, and then scraping the sand along the upper plane of the sand box;
step S3: after the first layer of molding sand is hardened, the mold II 2 is placed on the mold I1, the sand mixer is started to flow sand layer by layer along the periphery of the mold after each layer of molding sand is placed, the thickness of each layer of sand is 200mm, and a next layer of sand box is placed after the molding sand is hardened until the lower mold 6 is manufactured;
step S4: after the sand of the lower mold 6 is hardened, lifting each layer of sand mold layer by layer and turning, taking out the mold II 2, then turning the first layer of sand box and the mold I1 together, and placing the first layer of sand box and the mold I1 on a sizing block;
step S5: chill, a riser and a pouring channel are placed on the first sand box and the mould I1, the gap between the chills is compacted by using a wood plate, then an upper molding sand box is placed, the sand mixer is started to run sand layer by layer along the periphery of the mould, and the thickness of each layer of sand is 200mm until the upper mold 9 is manufactured;
step S6: placing a core box I3 on a platform, placing a chilling block, starting the sand mixer to sand layer by layer along the periphery of the mold, wherein the thickness of each layer of sand is 200mm, and obtaining a sand core I7;
step S7: placing the core box II 4 on a platform, placing a chilling block, starting the sand mixer to sand layer by layer along the periphery of the mold, wherein the thickness of each layer of sand is 200mm, and obtaining a sand core II 8;
step S8: placing a core box III 5 on a platform, placing a chilling block, starting the sand mixer to sand layer by layer along the periphery of the mould, wherein the thickness of each layer of sand is 200mm, placing a lifting ring on the core box III 5, and winding an air rope on the lifting ring so as to lead gas in the sand core to the outside of a cavity during pouring, so that air holes are avoided, thus obtaining a sand core III 10, and placing a phi 100 ceramic pipe on the core head of the sand core III 10;
step S9: stacking each layer of the sand boxes of the lower mold 6;
step S10: the sand core I7 is positioned and hung into the lower mold 6 according to the core head cutting angle;
step S11: lifting the sand core II 8 into a lower mold 6, and aligning the sand core I7 with the sand core II 8 by taking the semicircular bosses carried by the sand core I7 and the sand core II 8 as references;
step S12: placing the upper mold 9 on an iron stand;
step S13: hang with lifting hook 11 on the rings to pass with the iron wire rings, the iron wire is hung on the crane will psammitolite III 10 is placed on the small handcart, utilizes the small handcart will psammitolite III 10 pushes away below the cope match-plate pattern 9, the iron wire passes phi 100 ceramic pipe, later the iron wire is hung will on the crane psammitolite III 10 lifts by crane, treats psammitolite III 10 places the back in place, will place the gasket on the lifting hook 11, then will with the nut lifting hook 11 is fixed tightly. According to the steps, each sand core III 10 is hung into the upper mold 9 and fixed;
step S14: 50mm is reserved between every 2 sand cores III 10, after the sand cores III 10 are lifted, the 50mm are filled and leveled by resin sand, and after the sand is hardened, the sand is brushed;
step S15: hanging the upper mold 9 into the lower mold 6 for box inspection;
step S16: placing a sprue box on the cope 6;
step S17: utilizing an electric furnace to melt molten iron, wherein the molten iron comprises the following components: c: 3.8, Si: 1.45, Mn: 0.2, P: 0.01, S: 0.01, turning the spheroidized molten iron into casting ladles with corresponding quantity, then sequentially turning into the pouring gate boxes, measuring the temperature, and pulling out a plug for pouring after the pouring temperature is reached. And opening the box after the in-mold temperature is reduced to below 300 ℃ after pouring, and taking out the casting.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. A casting production method of a large nodular cast iron millstone with a cavity is characterized by comprising the following steps:
step S1: the model is manufactured by adopting a real sample, the casting mold consists of a mold I and a mold II, and the mold parting height is determined according to the height of the first layer of sand box during molding;
step S2: placing the mould I on a platform, placing a first sand box, a cold iron, a hanging handle and a pouring gate, starting a sand mixer to sand layer by layer along the periphery of the mould, and then leveling along the upper plane of the sand box;
step S3: after the first layer of molding sand is hardened, the mold II is placed on the mold I, the sand mixer is started to flow sand layer by layer along the periphery of the mold after each layer of molding sand is placed, and the next layer of sand box is placed after the molding sand is hardened until the lower mold is manufactured;
step S4: after the sand of the lower mold is hardened, lifting each layer of sand mold layer by layer and turning over, taking out the mold II, then turning over the first layer of sand box and the mold I together, and placing the first layer of sand box and the mold I on a sizing block;
step S5: cold iron, a riser and a pouring gate are placed on the first sand box and the mould I, then an upper molding sand box is placed, and the sand mixer is started to flow sand layer by layer along the periphery of the mould until the upper mold is manufactured;
step S6: placing the core box I on a platform, placing a chilling block, starting the sand mixer to sand layer by layer along the periphery of the mould to obtain a sand core I;
step S7: placing the core box II on a platform, placing a chilling block, starting the sand mixer to sand layer by layer along the periphery of the mould to obtain a sand core II;
step S8: placing a core box III on a platform, placing a chilling block, starting the sand mixer to flow sand layer by layer along the periphery of the mould, placing a lifting ring on the core box III, winding an air outlet rope on the lifting ring so that gas in the sand core is led out of a cavity during casting to avoid air holes and obtain a sand core III, and placing a ceramic pipe on the core head of the sand core III;
step S9: stacking each layer of the sand boxes of the lower mold together;
step S10: hoisting the sand core I into the lower mold according to the core head cutting angle positioning;
step S11: lifting the sand core II into a lower mold, and aligning the sand core I and the sand core II by taking the semicircular bosses carried by the sand core I and the sand core II as references;
step S12: placing the cope on an iron stand;
step S13: hang with the lifting hook on the rings to pass with the iron wire rings, the iron wire is hung on the crane will psammitolite III is placed on the small handcart, utilizes the small handcart will psammitolite III pushes away below the cope match-plate pattern, and the iron wire passes ceramic pipe, later the iron wire is hung will on the crane psammitolite III hangs, treat psammitolite III places the back in place, will place the gasket on the lifting hook, then will with the nut the lifting hook is fixed tightly. Sequentially hoisting and fixing each sand core III into the upper mold according to the steps;
step S14: 50mm is reserved between every two (2) sand cores III, after the sand cores III are lifted, the 50mm sand cores are filled with resin sand, and after the sand is hardened, the sand is brushed;
step S15: hanging the upper mold into the lower mold to test the box;
step S16: placing a gate box on the cope;
step S17: and melting molten iron by using an electric furnace, turning the spheroidized molten iron into casting ladles with corresponding quantity, then sequentially turning into the pouring gate boxes, measuring the temperature, and carrying out plug-pulling pouring after the pouring temperature is reached. And opening the box after the in-mold temperature is reduced to below 300 ℃ after pouring, and taking out the casting.
2. The casting production method of the large-scale nodular cast iron millstone with the chamber as claimed in claim 1, wherein in the steps S2-S8, the thickness of each layer of sand is 200mm when the sand mixer pours the sand layer by layer, and the diameter of the ceramic tube is 100 mm.
3. The casting production method of the large nodular cast iron millstone with the chamber as claimed in claim 1, wherein in the steps S2-S8, the clearance of the chilling block is compacted by a wood plate.
4. The casting production method of the large-scale nodular cast iron millstone with the chamber of claim 1, wherein in the step S17, the ingredients in the molten iron are as follows: c: 3.75-3.85, Si: 1.43-1.48, Mn < 0.25, P < 0.04, and S < 0.025.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113182491A (en) * | 2021-03-19 | 2021-07-30 | 南京龙宁机床装备有限公司 | Method for casting workbench by using lost foam |
| CN115007800A (en) * | 2022-05-12 | 2022-09-06 | 大连华锐重工铸业有限公司 | Universal core bar hoisting device for large castings and use method thereof |
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| CN103071762A (en) * | 2013-01-23 | 2013-05-01 | 国营第六一六厂 | Method for threaded connection between cast moulds and cores and between cores |
| CN203448618U (en) * | 2013-07-12 | 2014-02-26 | 林州市合鑫铸业有限公司 | Core setting device in upper sand mold |
| CN103801664A (en) * | 2014-01-14 | 2014-05-21 | 桐乡合德机械有限公司 | Top box sand core fixing structure and fixing method thereof |
| CN108453220A (en) * | 2018-03-16 | 2018-08-28 | 共享装备股份有限公司 | The casting method of outer shell casting is pressed in a kind of steam turbine ultra supercritical |
| CN109128029A (en) * | 2018-10-29 | 2019-01-04 | 扬州广润机械有限公司 | A kind of flywheel shell of engine tide mould sand build-in function film covered sand core casting mould |
| CN111014640A (en) * | 2019-12-20 | 2020-04-17 | 安徽永茂泰汽车零部件有限公司 | Automobile part casting molding process |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113182491A (en) * | 2021-03-19 | 2021-07-30 | 南京龙宁机床装备有限公司 | Method for casting workbench by using lost foam |
| CN113182491B (en) * | 2021-03-19 | 2022-07-29 | 南京龙宁机床装备有限公司 | Method for casting workbench by using lost foam |
| CN115007800A (en) * | 2022-05-12 | 2022-09-06 | 大连华锐重工铸业有限公司 | Universal core bar hoisting device for large castings and use method thereof |
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| CN111618246B (en) | 2021-08-10 |
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