CN115338373A - Device and method for saving casting cost of plug - Google Patents

Device and method for saving casting cost of plug Download PDF

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Publication number
CN115338373A
CN115338373A CN202210821912.XA CN202210821912A CN115338373A CN 115338373 A CN115338373 A CN 115338373A CN 202210821912 A CN202210821912 A CN 202210821912A CN 115338373 A CN115338373 A CN 115338373A
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CN
China
Prior art keywords
riser
cavity
sand box
sand
casting
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Pending
Application number
CN202210821912.XA
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Chinese (zh)
Inventor
张宝军
王新华
徐广阔
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Baotou Iron and Steel Group Co Ltd
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Baotou Iron and Steel Group Co Ltd
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Application filed by Baotou Iron and Steel Group Co Ltd filed Critical Baotou Iron and Steel Group Co Ltd
Priority to CN202210821912.XA priority Critical patent/CN115338373A/en
Publication of CN115338373A publication Critical patent/CN115338373A/en
Pending legal-status Critical Current

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    • 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
    • B22C9/02—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
    • B22C9/082—Sprues, pouring cups
    • 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
    • B22D27/00—Treating the metal in the mould while it is molten or ductile ; Pressure or vacuum casting
    • B22D27/04—Influencing the temperature of the metal, e.g. by heating or cooling the mould
    • B22D27/06—Heating the top discard of ingots

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

The invention discloses a device and a method for saving the casting cost of a top head, wherein the structure for casting the top head comprises an upper sand box and a lower sand box, the upper sand box is a riser sand box, the lower sand box is a product top sand box, a riser cavity is fixed in the upper sand box, a pouring gate is fixed on the riser cavity, a top sand core is arranged in the lower sand box, a top cavity is arranged at the periphery of the top sand core, molten steel enters the riser cavity along the top sand core in the lower sand box through a casting channel in the upper sand box and the lower sand box, 1 or more riser cavities are arranged along the upper sand box, 3 riser cavities are arranged along the upper sand box, the height of one riser cavity is half of the height of the other two riser cavities, a riser cavity sleeve is fixed at the periphery of the riser cavity, and the riser cavity sleeve is made of a heat-insulating material or a heating material.

Description

Device and method for saving casting cost of plug
Technical Field
The invention relates to the technical field of casting, in particular to a device and a method for saving the casting cost of a plug.
Background
In the production of seamless steel pipes, a solid pipe blank is rolled into a hollow tubular billet by a puncher process, a top of the puncher is a thermal deformation tool for extruding, penetrating and deforming the solid pipe blank into the hollow tubular billet, and the top is generally manufactured by sand casting. The structure of top sand casting is composed of an upper sand box and a lower sand box, wherein one sand box is used for supporting the tops of the products, and the other sand box is used for casting risers. The height of a sand box of a traditional riser is large, after molten steel is cast, the volume of a residual riser cylinder is large, after casting, cooling and sand removal, an operator can separate a product top from the residual riser cylinder by gas welding, then the product top enters the next procedure, the residual riser cylinder is recycled as waste, the yield of the top is low, the height of the sand box of the riser is high, the consumption of casting sand is large, and the manufacturing cost of the top is high.
Disclosure of Invention
The present invention is directed to a device and a method for saving the casting cost of a plug, so as to solve the problems mentioned in the background art.
The purpose of the invention is realized by the following technical scheme: the device for saving the casting cost of the top comprises an upper sand box and a lower sand box, wherein the upper sand box is a riser sand box, the lower sand box is a product top sand box, a riser cavity is fixed in the upper sand box, a sprue gate is fixed on the riser cavity, a top sand core is arranged in the lower sand box, a top cavity is arranged on the periphery of the top sand core, and molten steel enters the top cavity along the top sand core in the lower sand box through a casting channel in the upper sand box and the lower sand box.
Further, the riser cavity is provided with 1 or more riser cavities along the sandbox.
Further, 3 riser cavities are arranged along the sandbox, and the height of one riser cavity is half of the heights of the rest two riser cavities.
Furthermore, a riser cavity sleeve is fixedly arranged on the periphery of the riser cavity and is made of a heat insulation material or a heating material.
Furthermore, a heating cavity is fixedly arranged on the periphery of the riser cavity, an induction coil is arranged in the heating cavity, and the induction coil is connected with an external high-frequency power supply through a connecting wire.
Furthermore, a dead head cavity partition plate is fixedly arranged at the bottom of the dead head cavity and is made of oil core sand or refractory materials, a through hole is fixedly formed in the dead head cavity partition plate, and the diameter of the through hole is one third of the diameter of the opening of the dead head cavity.
Furthermore, a fine sand core is arranged in the riser cavity and is positioned in the center of the riser cavity, and the height of the fine sand core is half of that of the riser cavity.
Furthermore, the height of the riser cavity is within 10cm, and the riser sand mold of the riser cavity in the sand feeding box is filled with sand to 5cm.
Furthermore, the size of the sandbox is 1100 x 700 x 350, the height of the cavity of the riser is 35cm, liquid metal in the riser can be timely supplemented into the top of the product piece, and the supplementing height is 2 cm-10 cm.
A method of an apparatus for saving costs of casting a plug, comprising the steps of:
in the casting process, a crane lifts a steel ladle, molten steel is poured through a pouring gate, the molten steel enters a top cavity along a top sand core in a lower sand box through a pouring channel in an upper sand box and the lower sand box, the casting is stopped when the molten steel is poured into the top of a riser cavity in the upper sand box, then the volume of the top of a product piece is shrunk when the top of the product piece is changed from a liquid state to a solid state, molten metal at the top in the riser cavity can be supplemented into the top of the product piece in time, after the casting, cooling and sand removal, the volume of a residual riser is very small or no residual riser exists, and then the top of the product piece enters the next process;
the size of a sand box of the riser cavity is 1100 multiplied by 700 multiplied by 350, the height of the riser is 35cm, the volume of the product part top head shrinks when the liquid state is changed into the solid state, the molten metal in the riser which is still in the liquid state can be supplemented into the product part top head in time, and the supplemented volume is changed into the supplemented height of 2 cm-10 cm;
the additional height being defined by the volume of the product piece head andthe characteristics of different metals determine that the volume of a riser cylinder remained after casting is controlled as follows: riser cross-sectional area a × riser height: 225X (35-10) cm 3 After casting, cooling and sand removal, an operator separates a product part top from a residual riser cylinder by gas welding, then the product part top enters the next procedure, and the residual riser cylinder is recovered as waste;
the residual riser cylinder after casting and sand removal is useless, redesigning is needed for reducing casting cost, the height of a riser mold is shortened to be within 10cm from 35cm, and correspondingly, the riser mold is only filled to be within 10cm when sand filling is carried out on the riser mold.
Compared with the prior art, the invention has the beneficial effects that: the method improves the success rate of the top of the product, greatly reduces the using amount of casting sand, reduces the casting cost of the top, greatly reduces the volume of a residual riser cylinder after casting, cooling and sand removal, improves the success rate of the top of the product, greatly reduces the using amount of casting sand, and reduces the casting cost of the top; the height of the riser mold is shortened to be within 10cm from 35cm, and accordingly, the riser mold is only filled to be within 10cm, preferably 5cm when the riser mold is manufactured and sand is filled.
Drawings
FIG. 1 is a schematic view of the overall connection state of the present invention;
FIG. 2 is a schematic view of the baffle plate of the feeder cavity of the present invention;
FIG. 3 is a schematic view of the connection of a feeder cavity to a feeder cavity sleeve according to the present invention;
FIG. 4 is a schematic view of a heating chamber and induction coil of the present invention;
fig. 5 is a schematic view of another embodiment of the riser of the present invention.
Detailed Description
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 embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
As shown in fig. 1 to 5, an apparatus for saving the cost of plug casting is characterized in that: the structure for casting the top comprises an upper sand box 3 and a lower sand box 6, wherein the upper sand box 3 is a riser sand box, the lower sand box 6 is a product top sand box, a riser cavity 2 is fixed in the upper sand box 3, a sprue gate 1 is fixed on the riser cavity 2, a top sand core 5 is arranged in the lower sand box 6, a top cavity 4 is arranged on the periphery of the top sand core 5, and molten steel enters the top cavity 4 along the top sand core 5 in the lower sand box 6 through a casting channel in the upper sand box 3 and the lower sand box 6.
In order to facilitate the use of different numbers of feeder cavities 2 as required in the use state, the size of the feeder cavities 2 is set according to the actual processing requirement, and a further preferred embodiment of the present invention is to arrange 1 or more feeder cavities 2 along the cope flask 3.
In order to improve the supply of liquid in the riser cavity to the casting part according to riser cavities with different heights in a use state, the cooling speed of the riser is slow, shrinkage holes caused by feeding or self shrinkage are directly generated in the riser, and the riser cavity 2 is further provided with 3 riser cavities along the upper sand box 3, and the height of one riser cavity 2 is half of the height of the other two riser cavities 2.
In order to facilitate heat preservation treatment of the riser cavity in a use state and prolong the cooling time of the riser cavity, a further preferred embodiment of the invention is that a riser cavity sleeve 9 is fixedly arranged on the periphery of the riser cavity 2, and the riser cavity sleeve 9 is made of a heat preservation material or a heating material.
In order to prolong the effect of riser solidification time and realize real-time control on the temperature of molten metal in the riser in a use state, a further preferred embodiment of the invention is that a heating cavity 10 is fixedly arranged on the periphery of the riser cavity 2, an induction coil 11 is arranged in the heating cavity 10, and the heating cavity is connected with an external high-frequency power supply through the induction coil 11 by a connecting wire.
In order to facilitate the riser to be easily removed from the sandbox cast iron in a use state, an operator can separate a top of a product piece from a residual riser cylinder by gas welding, and a further preferred embodiment of the invention is that a riser cavity partition plate 7 is fixedly arranged at the bottom of the riser cavity 2, the riser cavity partition plate 7 is made of oil core sand or refractory material, and a through hole is fixedly formed in the riser cavity partition plate 7, and the diameter of the through hole is one third of the opening diameter of the riser cavity 2.
In order to greatly reduce the volume of a residual riser cylinder after casting, cooling and sand removal, the success rate of a top of a product piece is improved, the using amount of casting sand is greatly reduced, and the casting cost of the top is reduced, the further preferable embodiment of the invention is that the height of the riser cavity 2 is less than 10cm, and the riser sand mold of the riser cavity 2 in the sand feeding box 3 is filled to 5cm.
The residual riser cylinder is recovered as waste. The residual riser cylinder after casting and sand removal is useless. In order to reduce the casting cost, the preferred embodiment of the invention is that the size of the upper sand box 3 is 1100 x 700 x 350, the height of the riser cavity 2 is 35cm, and the liquid metal in the riser can be supplemented into the top of the product piece in time, and the supplemented height is 2 cm-10 cm.
A method of an apparatus for saving costs of casting a plug, comprising the steps of:
in the casting process, a crane lifts a steel ladle, molten steel is poured through a pouring gate 1, the molten steel enters a top cavity 4 along a top sand core 5 in a lower sand box 6 through pouring channels in an upper sand box 3 and the lower sand box 6, the casting is stopped when the molten steel is poured into the top of a riser cavity 2 in the upper sand box 3, then the volume of a product top is shrunk when the liquid state is changed into the solid state, molten metal in the riser cavity 2 which is still in the liquid state can be supplemented into the product top in time, after the casting, the cooling and the sand removal, the volume of a residual riser is very small or no residual riser, and then the product top enters the next process;
the size of a sand box of the riser cavity 2 is 1100 multiplied by 700 multiplied by 350, the height of the riser is 35cm, the volume of the top of the product piece shrinks when the top of the product piece is changed from liquid state to solid state, molten metal in the riser which is still in the liquid state can be supplemented into the top of the product piece in time, and the supplemented volume is changed into supplemented height of 2 cm-10 cm;
the height of supplement is determined by the volume of the top of the product piece and the characteristics of different metals, and the volume of the residual riser cylinder after casting is controlled as follows: riser cross-sectional area a × riser height: 225X (35-10) cm 3 After casting, cooling and sand removal, an operator separates a product part top from a residual riser cylinder by gas welding, then the product part top enters the next procedure, and the residual riser cylinder is recovered as waste;
the residual riser cylinder after casting and sand removal is useless, redesigning is needed for reducing casting cost, the height of a riser mold is shortened to be within 10cm from 35cm, and correspondingly, the riser mold is only filled to be within 10cm when sand filling is carried out on the riser mold.
Embodiment 1:
the casting of a riser with the phi 460 specification is taken as an example, the size of a sand box of the riser is 1100 x 700 x 350, the height of the riser is 35cm, the volume of the product part riser shrinks when the product part riser is changed from a liquid state to a solid state, molten metal in the riser which is still in the liquid state is supplemented into the product part riser in time, the supplementing height is 2 cm-10 cm, and thus after the casting, the minimum volume of a riser cylinder is as follows: riser cross-sectional area a × riser height: 225X (35-10) cm 3 Cold pouringAfter sand is removed, the top of the product piece is separated from the riser by gas welding, then the top of the product piece enters the next procedure, and the riser is recycled as waste. After casting and sand removal, the riser cylinder is useless and needs to be redesigned, the height of the riser mold is shortened from 35cm to 10cm, and correspondingly, the riser mold is only filled to 10cm when sand filling is carried out on the riser mold. Therefore, after casting, cooling and sand removal, the volume of the dead head is greatly reduced, the success rate of the top of a product is improved, the using amount of casting sand is greatly reduced, and the casting cost of the top is reduced. Embodiment 2:
as an example, the size of a sand box of the riser is changed from 1100 multiplied by 700 multiplied by 350 to 1100 multiplied by 700 multiplied by 100, and the height of a corresponding riser mold is designed to be 10cm, so that after casting, cooling and sand removal, the volume of the riser is greatly reduced, the success rate of the product piece top is improved, the consumption of casting sand is greatly reduced, and the casting cost of the top is reduced.
The working process is that in the casting process, a crane lifts a steel ladle, molten steel is poured through a casting opening 1, the molten steel enters a top cavity 4 along a top sand core 5 in a lower sand box 6 through a casting channel in an upper sand box 3 and the lower sand box 6, and the casting is stopped when the molten steel is poured into the top of a top pouring cavity 2 in the upper sand box 3. And then, the volume of the product part top head is shrunk when the product part top head is changed from a liquid state to a solid state, the liquid metal in the riser head is supplemented into the product part top head in time, after casting, cooling and sand removal, the volume of the residual riser head is very small or no residual riser head exists, and then the product part top head enters the next working procedure. Thus, the yield of the top of the product piece is improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (9)

1. The utility model provides a practice thrift top casting cost's device which characterized in that: the top casting structure comprises an upper sand box (3) and a lower sand box (6), wherein the upper sand box (3) is a riser sand box, the lower sand box (6) is a product top sand box, a riser cavity (2) is fixed in the upper sand box (3), a pouring gate (1) is fixed on the riser cavity (2), a top sand core (5) is arranged in the lower sand box (6), a top cavity (4) is arranged on the periphery of the top sand core (5), and molten steel enters the top cavity (4) along the top sand core (5) in the lower sand box (6) through a pouring channel in the upper sand box (3) and the lower sand box (6).
2. The apparatus for saving the cost of plug casting according to claim 1, wherein: the riser cavity (2) is provided with 1 or more riser cavities along the sand feeding box (3).
3. The apparatus for saving the cost of plug casting according to claim 2, wherein: the riser cavities (2) are arranged along the sand feeding box (3) in 3 numbers, and the height of one riser cavity (2) is half of the height of the rest two riser cavities (2).
4. The apparatus for saving the cost of plug casting according to claim 2, wherein: and a riser cavity sleeve (9) is fixedly arranged on the periphery of the riser cavity (2), and the riser cavity sleeve (9) is made of a heat-insulating material or a heating material.
5. The apparatus for saving the cost of plug casting according to claim 2, wherein: the feeder head cavity (2) is peripherally and fixedly provided with a heating cavity (10), an induction coil (11) is arranged in the heating cavity (10), and the induction coil (11) is connected with an external high-frequency power supply through a connecting wire.
6. The apparatus for saving the cost of plug casting according to claim 1, wherein: the riser cavity is characterized in that a riser cavity partition plate (7) is fixedly arranged at the bottom of the riser cavity (2), the riser cavity partition plate (7) is made of oil core sand or refractory materials, a through hole is fixedly formed in the riser cavity partition plate (7), and the diameter of the through hole is one third of the diameter of an opening of the riser cavity (2).
7. The apparatus for saving the cost of plug casting according to claim 1 or 2, wherein: the height of the riser cavity (2) is within 10cm, and the riser sand mold of the riser cavity (2) in the upper sand box (3) is filled with sand to 5cm.
8. The apparatus for saving the cost of plug casting according to claim 1 or 2, wherein: the size of the upper sand box (3) is 1100 multiplied by 700 multiplied by 350, the height of the riser cavity (2) is 35cm, liquid metal liquid in the riser can be supplemented into the top of a product in time, and the supplementing height is 2 cm-10 cm.
9. The method of an apparatus for saving costs of plug casting according to any one of claims 1 to 8, wherein: the method comprises the following steps:
in the casting process, a crane lifts a steel ladle, molten steel is poured through a pouring gate (1), the molten steel enters a top cavity (4) along a top sand core (5) in a lower sand box (6) through a pouring channel in an upper sand box (3) and the lower sand box (6), the casting is stopped when the molten steel is poured into the top of a riser cavity (2) in the upper sand box (3), then, the volume of a product top is shrunk when the liquid state is changed into the solid state, the top in the riser cavity (2) is supplemented into the product top when liquid metal liquid state meets the time, after the casting and cooling are performed, the volume of a residual riser is very small or no residual riser exists, and then the product top enters the next process;
the size of a sand box of the riser cavity (2) is 1100 multiplied by 700 multiplied by 350, the height of the riser is 35cm, the volume of the top of the product piece shrinks when the liquid state is changed into the solid state, the molten metal in the riser which is still in the liquid state can be supplemented into the top of the product piece in time, and the supplemented volume is converted into supplemented height of 2 cm-10 cm;
the height of supplement is determined by the volume of the top of the product piece and the characteristics of different metals, and the volume of the residual riser cylinder after casting is controlled as follows: riser cross-sectional area a × riser height: 225X (35-10) cm 3 After casting, cooling and sand removal, an operator separates a product part top from a residual riser cylinder by gas welding, then the product part top enters the next procedure, and the residual riser cylinder is recovered as waste; the residual riser cylinder after casting and sand removal is useless, redesigning is needed for reducing casting cost, the height of a riser mold is shortened to be within 10cm from 35cm, and correspondingly, the riser mold is only filled to be within 10cm when sand filling is carried out on the riser mold.
CN202210821912.XA 2022-07-12 2022-07-12 Device and method for saving casting cost of plug Pending CN115338373A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210821912.XA CN115338373A (en) 2022-07-12 2022-07-12 Device and method for saving casting cost of plug

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210821912.XA CN115338373A (en) 2022-07-12 2022-07-12 Device and method for saving casting cost of plug

Publications (1)

Publication Number Publication Date
CN115338373A true CN115338373A (en) 2022-11-15

Family

ID=83948425

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210821912.XA Pending CN115338373A (en) 2022-07-12 2022-07-12 Device and method for saving casting cost of plug

Country Status (1)

Country Link
CN (1) CN115338373A (en)

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