CN112024821B - Frog mould, frog pouring method and frog casting - Google Patents
Frog mould, frog pouring method and frog casting Download PDFInfo
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- CN112024821B CN112024821B CN202010787154.5A CN202010787154A CN112024821B CN 112024821 B CN112024821 B CN 112024821B CN 202010787154 A CN202010787154 A CN 202010787154A CN 112024821 B CN112024821 B CN 112024821B
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- 238000005266 casting Methods 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000002893 slag Substances 0.000 claims abstract description 156
- 239000004576 sand Substances 0.000 claims abstract description 108
- 229910052751 metal Inorganic materials 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000005520 cutting process Methods 0.000 claims description 23
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 230000007547 defect Effects 0.000 abstract description 35
- 229910000831 Steel Inorganic materials 0.000 abstract description 26
- 239000010959 steel Substances 0.000 abstract description 26
- 239000000126 substance Substances 0.000 abstract description 6
- 230000003993 interaction Effects 0.000 abstract description 4
- 239000011148 porous material Substances 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 12
- 239000012535 impurity Substances 0.000 description 10
- 238000009434 installation Methods 0.000 description 8
- 238000003754 machining Methods 0.000 description 7
- 230000008439 repair process Effects 0.000 description 7
- 238000003466 welding Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 229910000617 Mangalloy Inorganic materials 0.000 description 3
- 238000011900 installation process Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000003110 molding sand Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/08—Features with respect to supply of molten metal, e.g. ingates, circular gates, skim gates
- B22C9/088—Feeder heads
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B7/00—Switches; Crossings
- E01B7/10—Frogs
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention provides a frog mould, a frog pouring method and a frog casting, wherein the frog mould comprises a frog mould main body, a slag collecting riser mould and a sand sheet, the slag collecting riser mould is arranged at the end of the non-pouring end of a lower mould of the frog mould main body, so that during pouring of metal liquid, the first molten steel after filling is collected to scour a casting mould or to generate inclusion and gas through interaction with moisture or other substances in casting mould sand, therefore, the defects of casting surface pores during pouring can be improved, the defects of sand holes, sand inclusion, slag inclusion and the like can be reduced, and the quality of the frog casting is improved.
Description
Technical Field
The invention relates to the technical field of casting, in particular to a frog mold, a frog pouring method and a frog casting.
Background
At present, because the frog belongs to a large and thin-wall casting, in the pouring process, the molten steel does not have time to float up due to scouring of a casting mold or inclusion and gas generated by interaction with moisture or other substances in casting mold sand, and the molten steel begins to solidify, so that the defects of air holes, slag inclusion and the like are formed on the top surface of the frog rail. The defects of the top surface air hole and the like of the frog rail cannot be overcome in the conventional casting process, so that the repair welding workload is large, the quality risk is high, even more waste products can be caused, and the production cost is increased.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, a first object of the invention proposes a frog mould.
A second object of the invention is to provide a frog casting method.
A third object of the invention is to propose a frog casting.
In view of the above, a first object of the present invention is to provide a frog mold, comprising:
a frog mold body; the slag collecting riser die is arranged at the end part of the frog die main body; and (3) preparing sand sheets, wherein the sand sheets are arranged between the frog mold main body and the slag collecting riser mold.
The frog mould provided by the invention comprises a frog mould main body, a slag collecting riser mould and a sand sheet, wherein the slag collecting riser mould is arranged at the end part of the frog mould main body, and the sand sheet is arranged between the frog mould main body and the slag collecting riser mould.
Particularly, the slag collecting riser die is arranged at the end head of the lower die non-pouring end of the frog die body, and the slag collecting riser die is arranged at the end head of the lower die non-pouring end of the frog die body, so that when metal liquid (such as molten steel) is poured, the first molten steel after being filled is collected to scour a casting mold or to generate inclusion and gas through interaction with moisture or other substances in casting mold sand, the defects of air holes on the surface of a cast after pouring can be improved, the defects of sand holes, sand inclusion, slag inclusion and the like can be reduced, and the quality of the frog cast is improved. Meanwhile, the sand sheet is arranged between the frog mould main body and the slag riser mould, so that on one hand, a channel communicated with the frog mould main body can be formed when the sand is filled in the modeling, and the metal liquid can conveniently pass through the channel during casting; on the other hand, after the pouring is finished, a connecting rib for connecting the frog casting and the slag collecting riser is formed, so that the cutting is easy, the slag collecting riser is conveniently cut off from the connecting rib, and the cutting efficiency is improved.
In addition, the frog mould in the technical scheme provided by the invention can also have the following additional technical characteristics:
in the above technical solution, the frog mould main body comprises: the first frog mold is provided with a first channel; and the second frog mold is arranged adjacent to the first frog mold and is provided with a second channel.
In the technical scheme, the first channel is arranged on the first frog mould, and the second frog mould is provided with the second channel, so that in the pouring process, metal liquid flows through a sand mould formed by the first channel and the second channel and enters the sand mould of the slag collecting riser mould, and then water and other impurities in casting mould sand can be washed through the first strand of molten steel flowing through the channels, and generated gas and impurities can be brought into the sand mould of the slag collecting riser mould by the molten steel, so that the defects of air holes on the surface of a casting are improved, the defects of sand holes, sand inclusion, slag inclusion and the like can be reduced, and the quality of the frog casting is improved.
In any one of the above technical solutions, further, the slag collecting riser mold includes: the first slag collecting riser die is connected with the end part of the first frog die; the second slag collecting riser die is connected with the end part of the second frog die; and the first slag collecting riser die is connected with the second slag collecting riser die.
In this technical scheme, the collection sediment rising head mould includes: the first slag collecting riser die and the second slag collecting riser die are connected through the first slag collecting riser die and the non-pouring end of the first frog die, the second slag collecting riser die and the non-pouring end of the second frog die, so that the first channel of the first frog die is communicated with the first slag collecting riser die, the second channel of the second frog die is communicated with the second slag collecting riser die, molten steel flows through the channels and is retained in a sand mold formed by the slag collecting riser dies during pouring, the effects of feeding, exhausting and slag collecting are achieved, the defects of air holes on the surface of a casting are improved, the defects of sand holes, sand inclusion, slag inclusion and the like are reduced, the quality of the frog casting is improved, and the slag collecting risers can be connected together after the pouring is finished by connecting the first slag collecting riser die and the second slag collecting riser die, the slag collecting dead head can be integrally cut and also connected together after being cut off, so that the collecting is convenient, and the collecting efficiency is improved.
In any of the above technical solutions, further, the method further includes: and the first slag collecting riser die and the second slag collecting riser die are connected through the connecting piece.
In the technical scheme, the first slag collecting riser die and the second slag collecting riser die are connected through the connecting piece, so that on one hand, the integral installation can be realized in the installation process, the installation difficulty is reduced, the installation is easy, and the effect of fastening connection is realized during the sand filling of the modeling; on the other hand, after the pouring is finished, the slag collecting risers are connected together, the slag collecting risers can be integrally cut, the slag collecting risers are also connected together after being cut off, the collection is convenient, and the collection efficiency is improved.
In any one of the above technical solutions, further, the sand-made sheet includes: the first sand sheet is arranged between the first slag collecting riser die and the first frog die, and is provided with a third channel communicated with the first channel; and the second sand sheet is arranged between the second slag collecting riser die and the second frog die, and is provided with a fourth channel communicated with the second channel.
In this technical scheme, the sand film-making includes first sand film-making and second sand film-making, wherein, is provided with the third passageway on the first sand film-making, is provided with the fourth passageway on the second sand film-making. Specifically, through installing first sand system piece between first frog mould and first collection sediment rising head mould to and install second sand system piece between second frog mould and second collection sediment rising head mould, realized after the pouring is accomplished, the position of installing first sand system piece and second sand system piece forms easily cutting the muscle, can be very easy through easily cutting the muscle and cut it apart, easy to operate has reduced the production and processing cost. Furthermore, the third channel is communicated with the first channel, and the fourth channel is communicated with the second channel, so that the molten steel can smoothly flow through the channels in the pouring process and enter the sand mold of the slag collecting riser mold, impurities and gas generated by moisture and other substances in the channels are washed out of the channels and collected in the sand mold of the slag collecting riser mold in the process that the molten steel flows through the channels, and the molten steel remained in the sand mold of the slag collecting riser mold has the effects of feeding, exhausting and collecting slag, so that the defects of pores on the surface of a casting are improved, the defects of sand holes, sand inclusion, slag inclusion and the like are reduced, and the quality of the frog casting is improved.
In any of the above technical solutions, further, the first slag collecting riser die is mounted on the lower die plate of the first frog die through bolts; and the second slag collecting riser die is arranged on a lower die plate of the second frog die through bolts.
In the technical scheme, the first slag collecting riser die is installed on the lower die plate of the first frog die through the bolts, the second slag collecting riser die is installed on the lower die plate of the second frog die through the bolts, and the position of the slag collecting riser die is set, so that molten steel can enter a sand mold of the slag collecting riser die during pouring to play roles of exhausting, collecting slag and feeding.
In any of the above technical solutions, further, the height of the upper surface of the frog mold body and the height of the upper surface of the slag collecting riser mold are located on the same plane.
In the technical scheme, the height of the upper surface of the frog mould main body and the height of the upper surface of the slag collecting riser mould are in the same plane, so that the defects that after pouring is finished, frog castings generate large vibration impact due to inconsistent casting heights in the vibration shakeout process, cracks occur at the end heads of the frog castings, and the like are overcome, and the quality problems that cracks occur in the vibration shakeout process are solved.
A second object of the invention is to propose a frog casting method for frog molds, comprising: pouring metal liquid into a sand mold manufactured by a frog mold to obtain an initial frog casting, wherein the initial frog casting comprises a frog casting and a slag collecting riser; and cutting and removing a slag collecting riser of the initial frog casting to obtain the frog casting.
In the technical scheme, the frog casting method provided by the invention is used for a frog mould, specifically, on the basis of the completion of the frog mould, metal liquid is poured into a sand mould manufactured by the frog mould, and an initial frog casting is obtained after the metal liquid is solidified, so that the initial frog casting is obtained by setting the frog mould and further pouring by adopting the frog casting method, the probability of forming the air hole defect on the rail top surface of the frog casting is reduced, the purposes of small repair welding workload, low quality risk and less waste quantity are realized, the problems that the repair welding workload is large and the quality risk is high due to the fact that the air hole defect on the rail top surface of the frog casting cannot be improved by the existing casting technology are solved, further, the initial frog casting comprises the frog casting and the slag, the frog casting and the slag collecting head are connected through easily-cuttable ribs, and the slag collecting head is removed from the frog casting by adopting a flame cutting mode, the cutting is easy to realize and operate in the cutting process.
In the above technical solution, the distance from the cut position to the end of the main body of the frog casting is greater than or equal to 10 mm.
In this technical scheme, set up in the tip department of the main part of the frog foundry goods apart from being greater than or equal to 10mm through the position with the cutting, realized that flame keeps away from frog foundry goods body in cutting process, can not lead to frog foundry goods body inner structure to change because of local high temperature, and then produce quality defect, keep away from frog foundry goods body simultaneously and be greater than more than 10mm, thereby leave the machining allowance for subsequent machining and guarantee the machining precision, improve product quality.
The third purpose of the invention is to provide a frog casting which is prepared by a frog pouring method.
According to the technical scheme, a frog casting finished product is formed by casting through a frog casting method on the basis of a frog mold, so that the defects of air holes on the surface of the casting are improved, the defects of sand holes, sand inclusion, slag inclusion and the like of the frog casting can be reduced, and the quality of the frog casting is further improved.
According to the frog mould, the frog pouring method and the frog casting, the slag collecting riser mould is arranged on the lower template of the frog mould main body, so that the first strand of molten steel washes water and other impurities in casting mould sand, and generated gas and impurities can be brought into a sand mould of the slag collecting riser mould by the molten steel in the pouring process, the surface air hole defect of the casting is improved, the defects of sand holes, sand inclusion, slag inclusion and the like can be reduced, and the quality of the frog casting is improved.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a front view schematic of a frog mold according to one embodiment of the present invention;
fig. 2 is a schematic top view of a frog mold according to an embodiment of the present invention;
FIG. 3 is a schematic view of a cross-sectional view of a frog mold in the embodiment of FIG. 1;
FIG. 4 is a front view schematic of a frog casting according to another embodiment of the present invention;
FIG. 5 is a schematic top view of a frog casting according to another embodiment of the present invention;
fig. 6 is a schematic flow diagram of a frog casting method according to an embodiment of the present invention.
Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 5 is:
1 frog mold;
10 frog mould main bodies, 20 slag collecting riser moulds, 30 sand production and 40 initial frog castings;
102 a first frog mold, 104 a second frog mold, 106 a first channel, 108 a second channel;
202 a first slag collecting riser die, 204 a second slag collecting riser die;
302 a first sand section, 304 a second sand section, 306 a third channel, 308 a fourth channel;
402 frog castings, 404 slag risers;
500 connecting pieces;
600 bolts.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
A frog mould 1, a frog casting method and a frog casting 402 according to some embodiments of the invention are described below with reference to fig. 1 to 6.
Example one
As shown in fig. 1 to 5, an embodiment of the present invention provides a frog mould 1, in particular a mould for casting high manganese steel frog, comprising: the frog mould comprises a frog mould main body 10, a slag collecting riser mould 20 and a sand sheet 30.
Wherein, the slag collecting riser mould 20 is arranged at the end part of the frog mould main body 10; the sand sheet 30 is arranged between the frog mould body 10 and the slag tapping head mould 20.
The frog mould 1 provided by the invention comprises a frog mould main body 10, a slag collecting riser mould 20 and a sand sheet 30, wherein the slag collecting riser mould 20 is arranged at the end part of the frog mould main body 10, and the sand sheet 30 is arranged between the frog mould main body 10 and the slag collecting riser mould 20.
Specifically, the slag collecting riser mold 20 is installed at the lower mold non-pouring end of the frog mold main body 10, and the slag collecting riser is installed at the lower mold non-pouring end of the frog mold main body 10, so that the purpose that when metal liquid is poured, the slag collecting riser is used for collecting impurities and gas generated by scouring of the first molten steel after mold filling on a casting mold or interaction with moisture or other substances in casting mold sand is achieved, the defects of casting surface air holes after pouring is overcome, the defects of sand holes, sand inclusion, slag inclusion and the like can be reduced, the quality of the frog casting 402 is improved, the problem that the existing casting process cannot overcome the defects of rail top surface air holes of the frog casting 402, the repair welding workload is large, the quality risk is high is solved, and the production and processing cost is effectively reduced. Meanwhile, the sand sheet 30 is arranged between the frog mold main body 10 and the slag collecting riser mold 20, so that on one hand, when molding and sand filling are carried out, a channel communicated with the frog mold main body 10 can be formed, so that metal liquid can smoothly pass through the channel during casting, and further, redundant moisture and impurities in the channel are washed out and stored in a sand mold of the slag collecting riser mold 20, and the effects of exhausting, collecting slag and feeding are achieved; on the other hand, after the pouring is finished, connecting ribs for connecting the frog casting 402 and the slag collecting riser 404 are formed, the connecting ribs are easy to cut, and the slag collecting riser 404 is conveniently cut from the connecting ribs, so that the cutting efficiency is improved, and the casting and cutting cost is reduced.
Specifically, the thickness of the sand sheet 30 can be set to 30mm, and the thickness of the sand sheet 30 can be adjusted according to the specific size of the frog in practical implementation.
Example two
As shown in fig. 1 to 3, one embodiment of the present invention provides a frog mold 1, comprising: the frog mould comprises a frog mould main body 10, a slag collecting riser mould 20 and a sand sheet 30.
Wherein, frog mould main part 10 includes: a first frog mold 102 and a second frog mold 104, the first frog mold 102 and the second frog mold 104 being arranged adjacently, wherein a first channel 106 is arranged on the first frog mold 102; the second frog assembly mould 104 is provided with a second channel 108.
In this embodiment, by providing the first passage 106 on the first frog mold 102 and the second frog mold 104 with the second passage 108, wherein the first passage 106 is formed by the frog head portion of the first frog mold 102 and the second passage 108 is formed by the frog head portion of the second frog mold 104, it is achieved that during the pouring process, the molten metal flows through the first passage 106 and the second passage 108 and enters the sand mold made by the slag trap riser mold 20, so that the moisture and other impurities in the casting sand can be washed by the first molten steel flowing through the sand mold passage, the generated gas and impurities can be brought into the sand mold of the slag trap riser mold 20 by the molten steel, thereby improving the porosity defect of the casting surface, reducing the defects of sand holes, sand inclusion and the like, improving the quality of the frog casting 402, and meanwhile, the first frog mold 102 is arranged adjacent to the second frog mold 104, the stability of the frog mould main body 10 is improved, the first channel 106 and the second channel 108 are not communicated with each other, molten steel needs to be poured from one end of the two channels separately during pouring, and therefore the molten steel in the first channel 106 and the molten steel in the second channel 108 are poured separately during pouring, mutual influence is avoided, and pouring operation is facilitated.
Further, the slag trap mold 20 shown in fig. 1 to 3 includes: a first slag trap riser mold 202 and a second slag trap riser mold 204, wherein the first slag trap riser mold 202 is connected to an end of the first frog mold 102; the second slag collection riser die 204 is connected with the end of the second frog die 104; in addition, the first slag collecting riser die 202 is connected with the second slag collecting riser die 204.
In this embodiment, the slag trap mold 20 includes: the first slag collecting riser die 202 and the second slag collecting riser die 204 are connected with the end of the first frog die 102 and the end of the second frog die 104, so that the first channel 106 of the first frog die 102 is communicated with the first slag collecting riser die 202, and the second channel 108 of the second frog die 104 is communicated with the second slag collecting riser die 204, and therefore, when pouring is carried out, molten steel can wash out moisture and impurities in a sand mould channel smoothly, and cannot cause blockage, and the molten steel is retained in a sand mould of the slag collecting riser die 20 after flowing through the channel to play roles of feeding, exhausting and collecting slag, so that the defects of air holes on the surface of a casting are improved, the defects of sand holes, sand inclusion and the like are reduced, and the quality of the frog casting 402 is improved.
In addition, the first slag collecting riser die 202 and the second slag collecting riser die 204 are connected, so that the integral installation can be realized in the die installation process, the installation difficulty is reduced, the installation is easy, the connecting ribs can be obtained by pouring after the molding sand filling, and the slag collecting risers 404 are connected together, so that the slag collecting risers 404 can be integrally cut and also connected together after being cut off, the collection is convenient, and the collection efficiency is improved.
Further, as shown in fig. 2 and 5, the method further includes: the connecting member 500 connects the first slag trap mold 202 and the second slag trap mold 204 through the connecting member 500.
In this embodiment, the first slag collecting riser die 202 and the second slag collecting riser die 204 are connected by the connecting member 500, so that on one hand, the die can be integrally installed in the installation process, the installation difficulty is reduced, and the installation is easy; on the other hand, the connecting piece 500 is easy to mold when molding and sand filling, and after casting is completed, connecting ribs for connection are formed between the two slag collecting risers 404, so that the slag collecting risers 404 can be integrally cut, the two slag collecting risers 404 after cutting off are also connected together, collection is facilitated, and collection efficiency is improved.
Further, as shown in fig. 1 to 3, the sanding sheet 30 includes: a first sand sheet 302 and a second sand sheet 304, wherein the first sand sheet 302 is arranged between the first slag trap riser mold 202 and the first frog mold 102, the first sand sheet 302 is provided with a third channel 306, and the third channel 306 is communicated with the first channel 106; the second sand production piece 304 is arranged between the second slag trap riser mould 204 and the second frog mould 104, the second sand production piece 304 is provided with a fourth channel 308, and the fourth channel 308 is communicated with the second channel 108.
Specifically, the sanding sheet 30 includes a first sanding sheet 302 and a second sanding sheet 304, wherein the first sanding sheet 302 has a third channel 306 disposed thereon and the second sanding sheet 304 has a fourth channel 308 disposed thereon. More specifically, by installing the first sand sheet 302 between the first frog mold 102 and the first slag trap mold 202, and installing the second sand sheet 304 between the second frog mold 104 and the second slag trap mold 204, it is achieved that after the casting is completed, the locations where the first sand sheet 302 and the second sand sheet 304 are placed form the easy-to-cut ribs, by which they can be easily cut apart. Further, the third channel 306 is communicated with the first channel 106, and the fourth channel 308 is communicated with the second channel 108, so that molten steel can smoothly flow through the channels in the pouring process and enter the sand mold of the slag collecting riser mold 20, inclusions and gas generated by moisture and other substances in the sand mold channels are flushed out of the channels and collected in the sand mold of the slag collecting riser mold 20 in the process that the molten steel flows through the channels, and the molten steel remained in the sand mold of the slag collecting riser mold 20 plays roles in feeding, exhausting and slag collecting, so that the defects of air holes on the surface of a casting are improved, the defects of sand holes, sand inclusion, slag inclusion and the like are reduced, and the quality of the frog casting 402 is improved. And, place sand film-making 30 when the molding is filled up the sand, easy to operate, difficult drunkenness, the quality of effectual assurance sand mould to the quality of product when having promoted the pouring, sand film-making 30 cost is low moreover, the effectual manufacturing cost that has practiced thrift.
Further, as shown in fig. 1 to 3, the first slag collecting riser die 202 is mounted on the lower template of the first frog die 102 through the bolt 600, and the second slag collecting riser die 204 is mounted on the lower template of the second frog die 104 through the bolt 600, so that the position of the slag collecting riser die 20 is set, and therefore, molten steel can enter a sand mold manufactured according to the slag collecting riser die 20 during casting, and plays roles of exhausting, collecting slag and feeding.
Further, as shown in fig. 1 to 3, the height of the upper surface of the frog mold body 10 and the height of the upper surface of the slag collecting riser mold 20 are located on the same plane.
Specifically, the height of the upper surface of the frog mould main body 10 and the height of the upper surface of the slag collecting riser mould 20 are in the same plane, and then after the sand is filled in the mould, the upper surfaces of the frog mould main body and the slag collecting riser mould are consistent, so that the two surfaces are still parallel and level after a finished product is poured, after the pouring is avoided, the frog casting is subjected to large vibration impact due to inconsistent casting height in the vibration shakeout cleaning process, cracks and other defects appear at the end part of the frog casting, and the quality problems of cracks and the like in the vibration shakeout process are solved.
EXAMPLE III
As shown in fig. 6, an embodiment of the present invention provides a frog casting method for a frog mold 1 as shown in fig. 1 to 5, the frog casting method comprising:
s602, pouring metal liquid into a sand mold manufactured by a frog mold to obtain an initial frog casting, wherein the initial frog casting comprises a frog casting and a slag collecting riser;
and S604, cutting and removing a slag collecting riser of the initial frog casting to obtain the frog casting.
In this embodiment, the frog casting method provided by the present invention is specifically a high manganese steel frog casting method, which is used for a frog mold 1, specifically, on the basis of the completion of the frog mold 1, a metal liquid is poured into a sand mold manufactured by the frog mold 1, and after the metal liquid is solidified, an initial frog casting 40, specifically, a whole cast high manganese steel frog casting is obtained, so that the initial frog casting 40 is obtained by setting the frog mold 1 and then pouring by adopting the frog casting method, the formation probability of the rail top surface pore defect of the frog casting 402 is reduced, the purposes of small repair welding workload, low quality risk and small quantity of waste products are achieved, the problems that the existing casting process cannot improve the rail top surface pore defect of the frog casting 402, so that the repair welding workload is large and the quality risk is high are solved, further, the initial frog casting 40 includes a frog 402 and a slag riser 404, the frog casting 402 and the slag riser 404 are connected through the easily-cutting ribs, and the cutting process is a rough machining process and has low requirements on cutting precision, so that the slag riser 404 is removed from the frog casting 402 in a flame cutting mode, the frog casting is easy to cut and operate in the cutting process, the flame cutting cost is low, and the production cost can be effectively saved.
Further, as shown in fig. 4, the distance from the location of the cut to the end of the body of the frog casting 402 is greater than or equal to 10 mm.
In this embodiment, the cutting position is set at the end of the main body of the frog casting 402 with the distance of more than or equal to 10mm, so that flame is far away from the frog casting 402 body in the cutting process, the internal structure of the frog casting 402 body is not changed due to overhigh local temperature, quality defects are generated, meanwhile, the frog casting 402 body is far away from more than 10mm, machining allowance is reserved for subsequent machining, machining precision is guaranteed, and product quality is improved.
Specifically, by comparing the statistics of the technical scheme of the present invention with the prior art, the following table shows the statistical results of the air hole ratio of the rail top surface of the frog casting 402 before and after the slag collecting riser mold 20 is installed at the non-pouring end of the frog mold main body 10:
| statistical items | Ratio of shallow air holes (depth less than 10mm) | Ratio of deep air holes (depth is more than or equal to 10mm) |
| Prior Art | 24.70％ | 3.84％ |
| Scheme of the invention | 10.02％ | 0.65％ |
| Comparative conclusion | Greatly reduce | Greatly reduce |
Compared with the prior art, the technical scheme of the invention has the advantages that after the slag collecting riser die 20 is arranged at the non-pouring end of the frog die main body 10, the proportion of shallow air holes (the depth is less than 10mm) on the top surface of the rail of the produced frog casting 402 is counted to be 10.02%, and the proportion of deep air holes (the depth is more than or equal to 10mm) is counted to be 0.65%. Meanwhile, the frog casting 402 produced by the frog casting method provided by the invention has the advantages that the air hole defects on the top surface of the rail are greatly reduced, the repair welding workload is smaller, the quality risk is smaller, the number of scrapped waste products is smaller, and the influence on the production cost is smaller. In addition, the frog casting method provided by the invention can reduce the defects of sand holes, sand inclusion, slag inclusion and the like of the frog casting 402, and further improve the quality of the frog casting 402.
In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically defined, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A frog mold, comprising:
a frog mold body;
the frog mold body comprises:
the first frog mould is provided with a first channel;
the second frog mold is arranged adjacent to the first frog mold and provided with a second channel, and the first channel and the second channel are not communicated with each other;
the slag collecting riser die is arranged at the end part of the frog die main body;
the sand sheet is arranged between the frog mold main body and the slag collecting riser mold;
the slag collecting riser die comprises:
the first slag collecting riser die is connected with the end part of the first frog die;
a second slag collecting riser die connected with an end of the second frog die;
the first slag collecting riser die is connected with the second slag collecting riser die;
the first channel is formed by a frog head portion of the first frog mold and the second channel is formed by a frog head portion of the second frog mold;
the first slag collecting riser die is installed on a lower die plate of the first frog die through bolts;
the second slag collecting riser die is installed on a lower die plate of the second frog die through bolts;
the height of the upper surface of the frog mould main body and the height of the upper surface of the slag collecting riser mould are positioned on the same plane.
2. The frog assembly of claim 1 further comprising:
and the first slag collecting riser die and the second slag collecting riser die are connected through the connecting piece.
3. The frog assembly of claim 1 wherein said sand production comprises:
the first sand sheet is arranged between the first slag collecting riser die and the first frog die, and is provided with a third channel communicated with the first channel;
and a second sand sheet, wherein the second sand sheet is arranged between the second slag collecting riser die and the second frog die, and is provided with a fourth channel communicated with the second channel.
4. A frog casting method for a frog mold according to any of claims 1 to 3, comprising:
pouring metal liquid into the sand mold manufactured by the frog mold to obtain an initial frog casting, wherein the initial frog casting comprises a frog casting and a slag collecting riser;
and cutting and removing the slag collecting dead head of the initial frog casting to obtain the frog casting.
5. The frog casting method of claim 4,
the distance from the position of the cut to the end of the body of the frog casting is greater than or equal to 10 mm.
6. A frog casting, characterized in that it is prepared by the frog casting method according to claim 4 or 5.
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| CN113231605B (en) * | 2021-05-13 | 2022-11-11 | 中国铁建重工集团股份有限公司道岔分公司 | Manufacturing method of super-long high manganese steel frog casting sand mold |
| CN113403888A (en) * | 2021-07-22 | 2021-09-17 | 芜湖中铁轨道装备有限公司 | Frog pouring method and frog casting thereof |
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