CN114406193A - V-shaped straightening roll casting mold, casting cooling device and casting method - Google Patents

V-shaped straightening roll casting mold, casting cooling device and casting method Download PDF

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Publication number
CN114406193A
CN114406193A CN202111673948.XA CN202111673948A CN114406193A CN 114406193 A CN114406193 A CN 114406193A CN 202111673948 A CN202111673948 A CN 202111673948A CN 114406193 A CN114406193 A CN 114406193A
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CN
China
Prior art keywords
cooling
inlet
casting
assembly
cavity
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Pending
Application number
CN202111673948.XA
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Chinese (zh)
Inventor
王盼合
王立勇
贾会军
郑海明
赵海员
马海茹
鞠庆红
韩承志
陈伟
陈旭
王永刚
李悦
郭凯强
刘志超
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Hebei Jinxi Iron And Steel Group Heavy Industry Technology Co ltd
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Hebei Jinxi Iron And Steel Group Heavy Industry Technology Co ltd
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Priority to CN202111673948.XA priority Critical patent/CN114406193A/en
Publication of CN114406193A publication Critical patent/CN114406193A/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
    • B22C9/02—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
    • 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

Abstract

The invention provides a V-shaped straightening roll casting mold, a casting cooling device and a casting method. V-arrangement straightening roll casting mould includes: the cooling pipe assembly is embedded in the forming bulge, the cooling pipe assembly surrounds the annular inner wall of the cooling body, one end of the cooling pipe assembly extends out of the cooling body to form a cooling inlet, and the other end of the cooling pipe assembly extends out of the cooling body to form a cooling outlet; and the sand mold and the cold mold body jointly form a cavity and are provided with a pouring gate communicated with the cavity. The V-shaped groove of the straightening roller can be formed by a forming bulge during casting, the machining allowance of a subsequent turning procedure is reduced to the maximum extent, the heat of the cold type body can be taken away by the circulating cooling pipeline in the casting process of the straightening roller, the temperature of the cold type body penetrating into the center of a casting is reduced, the cooling speed of the whole V-shaped groove of the straightening roller is consistent, the hardness of the working surface of the straightening roller is high, the hardness of each position of the straightening roller is uniform, and the service life of the straightening roller is prolonged.

Description

V-shaped straightening roll casting mold, casting cooling device and casting method
Technical Field
The invention belongs to the technical field of steel rolling operation, and particularly relates to a casting mold, a casting cooling device and a casting method of a V-shaped straightening roll for rolling large-scale angle steel.
Background
The existing steel rolling roll collar is usually processed by adopting a centrifugal casting mode, the diameter of a V-shaped straightening roll for producing large-scale angle steel is generally 1500mm, the thickness is 400-500mm, and the weight of a single piece is about 3.5 tons. The working surface of the large straightening roll (namely a V-shaped groove for straightening angle steel) is generally 300mm long and about 200mm deep on two oblique sides. When the centrifugal casting mode is adopted for machining, the V-shaped groove needs to be formed through turning, machining allowance is large, a working layer is damaged after turning, the service life of the straightening roll is short, when sand casting is adopted, the hardness distribution of the working surface of the straightening roll is uneven, and the service life of the straightening roll is also not long.
Disclosure of Invention
The invention provides a V-shaped straightening roll casting mold, a casting cooling device and a casting method, and aims to solve the problems that in the prior art, when a centrifugal casting mode is adopted for machining, a V-shaped groove needs to be formed through turning, the machining allowance is large, a working layer is damaged after turning, the service life of a straightening roll is short, when sand casting is adopted, the hardness distribution of a working surface of the straightening roll is uneven, and the service life of the straightening roll is also not long.
In order to achieve the purpose, the invention adopts the technical scheme that:
in a first aspect, the present invention provides a V-roll casting mold comprising: the cooling pipe assembly is characterized by comprising a cold type body, wherein the cold type body is annular, the annular inner wall of the cold type body is provided with a forming bulge used for forming a V-shaped groove of a straightening roller, a cooling pipe assembly surrounding the annular inner wall of the cold type body is embedded in the forming bulge, one end of the cooling pipe assembly extends out of the cold type body to form a cooling inlet, and the other end of the cooling pipe assembly extends out of the cold type body to form a cooling outlet; and the sand mold and the cold mold body jointly form a cavity and are provided with a pouring gate communicated with the cavity.
In one possible implementation, the cold body includes: the first connecting body is in a semicircular ring shape, and the inner wall of the first connecting body is provided with a first bulge part for forming a V-shaped groove of the straightening roller; the first cooling unit is embedded in the first protruding part around the annular inner wall of the first connecting body, one end of the first cooling unit extends out of the first connecting body to form a first inlet, and the other end of the first cooling unit extends out of the first connecting body to form a first outlet; the second connecting body is in a semicircular ring shape, the inner wall of the second connecting body is provided with a second bulge part used for forming a V-shaped groove of the straightening roller, the first connecting body and the second connecting body are spliced to form the cavity, and the first bulge part and the second bulge part are spliced to form the forming bulge; the second cooling unit is embedded in the second boss part around the annular inner wall of the first connecting body, one end of the second cooling unit extends out of the second connecting body to form a second inlet, the other end of the second cooling unit extends out of the second connecting body to form a second outlet, the first cooling unit and the second cooling unit jointly form the cooling pipe assembly, when the first outlet is communicated with the second inlet, the first inlet is the cooling inlet, and the second outlet is the cooling outlet; when the first inlet and the second inlet are not communicated, both the first inlet and the second inlet are the cooling inlet, and both the first outlet and the second outlet are the cooling outlet.
In a possible implementation manner, the first cooling unit and the second cooling unit are identical in structure and each comprise a plurality of cooling pipe elements arranged at intervals along the edge profile of the forming protrusion, and the distance from each cooling pipe element to the outer surface of the forming protrusion is identical.
When the V-shaped straightening roll casting die provided by the invention is used, molten metal enters the cavity through the pouring channel, the inner wall of the cold die body is provided with the forming bulge, and the V-shaped groove can be formed by the forming bulge during casting, so that the machining allowance of a subsequent turning procedure is reduced to the maximum extent. The cooling pipe assembly is buried in the forming protrusion, a cooling medium is introduced into the cooling pipe assembly during casting, heat of the cold-type body can be taken away, the temperature of the cold-type body penetrating into the center of the casting is reduced, the cooling speed of the whole V-shaped groove part of the straightening roll is consistent, the hardness of the working surface (V-shaped groove) of the straightening roll obtained by casting is high and uniform, and the service life of the straightening roll is prolonged.
In a second aspect, the present invention provides a V-roll casting cooling apparatus comprising: a V-roll casting mold as in any of the above implementations; the pumping assembly is provided with a liquid inlet communicated with the cooling inlet and a liquid outlet; one end of the cooling component is communicated with the cooling outlet, and the other end of the cooling component is communicated with the liquid inlet and used for cooling a cooling medium in the cooling component; the pumping assembly, the cooling pipe assembly and the cooling assembly are sequentially communicated to form a circulating cooling pipeline.
In one possible implementation, the V-roll casting cooling device further includes a heating assembly in communication with the liquid outlet and the cooling inlet, the heating assembly including: one end of the first pipe body is communicated with the liquid outlet, and the other end of the first pipe body is communicated with the cooling inlet; the electromagnetic coil is wound outside the first pipe body; and the heating tube is arranged in the first tube body along the axial direction of the first tube body, a central hole of the heating tube forms a flow channel of the cooling medium, or the flow channel of the cooling medium is respectively formed between the outer wall of the heating tube and the inner wall of the central hole of the first tube body and the central hole of the heating tube.
In a possible implementation manner, the inner diameter of the central hole of the end of the first tube body, which is communicated with the cooling inlet, is smaller than the inner diameter of the central hole of the end of the first tube body, which is communicated with the liquid outlet.
In one possible implementation, the V-roll casting cooling apparatus further includes a damper valve assembly disposed between the pumping assembly and the heating assembly, the damper valve assembly including: the cooling device comprises a shell, a first cooling device and a second cooling device, wherein the shell is provided with a regulating cavity, one end of the shell is provided with a first through hole which is communicated with the regulating cavity and the cooling circulation pipeline, and the other end of the shell is provided with a regulating hole which is communicated with the regulating cavity; the piston is slidably arranged in the adjusting cavity; the elastic piece is arranged in the adjusting cavity, and one end of the elastic piece is abutted against one end, far away from the first communication hole, of the piston; and the adjusting piece is arranged in the adjusting hole in a threaded fit manner, and one end of the adjusting piece is abutted to one end, far away from the piston, of the elastic piece.
In one possible implementation, the cooling assembly includes: one end of the second pipe body is communicated with the cooling outlet, and the other end of the second pipe body is communicated with the liquid inlet; the first partition board is arranged in the second pipe body and close to one end of the second pipe body; the second partition plate is arranged in the second pipe body and close to the other end of the second pipe body, the inner walls of the second partition plate, the first partition plate and the second pipe body jointly enclose to form a cooling cavity, a cooling inlet and a cooling outlet which are communicated with the cooling cavity are formed in the second pipe body, and the cooling medium enters the cooling cavity from the cooling inlet and flows out from the cooling outlet; the cooler is communicated with the cooling inlet and used for conveying cooling air or cooling water into the cooling cavity through the cooling inlet, and the cooling air or the cooling water flows out of the cooling cavity through the cooling outlet; and part of the third pipe body is accommodated in the cooling cavity, and two ends of the third pipe body penetrate through the first partition plate and the second partition plate respectively.
In a possible implementation manner, the cooling assembly further comprises a spraying pipe which is arranged on the upper portion of the cooling cavity and communicated with the cooling inlet.
The pumping assembly, the cooling pipe assembly and the cooling assembly of the V-shaped straightening roll casting cooling device form a circulating cooling pipeline, so that heat of a cold mould body can be continuously taken away during casting, the technical effect same as that of a V-shaped straightening roll casting mould is achieved, and repeated description is omitted.
In a third aspect, the present invention provides a V-roll casting method for producing a V-roll using the V-roll casting cooling apparatus as in any one of the above implementations, comprising the steps of: introducing a cooling medium with preset flow, preset pressure and preset temperature into the cooling pipe assembly of the cold type body through the pumping assembly;
pouring molten metal into the pouring channel within a first preset time when the pumping assembly continuously works, so that the molten metal fills the cavity through the pouring channel, and obtaining a primary casting body after a second preset time;
and opening the V-shaped straightening roll casting mold, and taking out the primary casting body to obtain the V-shaped straightening roll.
Pouring molten metal into the pouring channel within the preset time of continuous work of the pumping assembly, so that the molten metal fills the cavity through the pouring channel, and obtaining a primary casting body after the preset time;
and opening the V-shaped straightening roll casting mold, and taking out the primary casting body to obtain the V-shaped straightening roll.
The V-shaped straightening roll casting method provided by the invention has the advantages that the straightening roll is molded in the cavity during casting, under the action of the V-shaped straightening roll casting cooling device, the internal uniform structure and the carbide content with similar quantity can be obtained near the working surface (V-shaped groove) of the straightening roll, the integral hardness of the working surface of the straightening roll is high, the hardness of each position of the working surface is uniform, the wear resistance is good, and the service life of the straightening roll can be prolonged.
Drawings
FIG. 1 is a schematic structural view of a V-roll casting mold according to an embodiment of the present invention;
FIG. 2 is a schematic view of a V-roll casting mold according to another embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a cold-type body according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a cold-type body according to another embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating the operation of the casting cooling device for the rolled steel V-shaped straightening rolls according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of a heating element according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a regulator valve assembly according to an embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a cooling assembly according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of a cooling assembly according to another embodiment of the present invention.
Description of reference numerals:
1. steel rolling V-shaped straightening roll casting cooling device
10. Cold type body 11, first connector 12, first cooling unit
121. Cooling pipe element 13, second connection body 14, second cooling unit
20. Pumping assembly 21, liquid inlet 22 and liquid outlet
30. Cooling component 31, second body 32, first baffle
33. Second partition 34, third pipe 35, shower
36. Temperature-reducing inlet 37, temperature-reducing outlet 40 and heating assembly
41. First pipe 411, throttle passage 42, electromagnetic coil
43. Heating tube 50, regulating valve assembly 51 and shell
511. Regulating chamber 512, first communication hole 52, piston
53. Elastic piece 54, adjusting piece 60 and lower sand mould
61. Ingate 62, a cross gate 63, a first sprue
70. The center hole core 71, the second sprue 80 and the upper sand mold
81. Third sprue 82, riser
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to," "secured to," or "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on," "disposed on" another element, it can be directly on the other element or intervening elements may also be present. "plurality" means two or more. "at least one" refers to one or more quantities. "a number" means one or more than one.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Referring to fig. 1 to 9, a V-shaped straightening roll casting mold, a V-shaped straightening roll casting cooling device 1, and a V-shaped straightening roll casting method according to embodiments of the present invention will be described.
Referring to fig. 1 to 4, in a first aspect, an embodiment of the present invention provides a V-shaped straightening roll casting mold, including: the cooling type body 10 is annular, the annular inner wall of the cooling type body 10 is provided with a forming bulge for forming a V-shaped groove of a straightening roller, a cooling pipe assembly surrounding the annular inner wall of the cooling type body 10 is embedded in the forming bulge, one end of the cooling pipe assembly extends out of the cooling type body 10 to form a cooling inlet, and the other end of the cooling pipe assembly extends out of the cooling type body 10 to form a cooling outlet; and a sand mold which forms a cavity together with the cold mold body 10 and has a runner communicating with the cavity.
The inventor finds that in actual operation, when the V-shaped straightening roll is manufactured by adopting a centrifugal casting mode, the thickness of a V-shaped groove cold hard layer of the straightening roll obtained after turning is locally low, and the service life is short. The V-shaped straightening roll obtained by sand casting has inconsistent hardness of V-shaped grooves of the straightening roll at different positions, particularly the hardness of the bottom of the V-shaped groove is lower and is up to 20 percent compared with the hardness difference of the upper edge position of the V-shaped groove, so that the service life of the V-shaped straightening roll is seriously influenced.
In order to solve the above problems, the inventor has developed and manufactured a V-shaped straightening roll casting mold according to an embodiment of the present invention, in which when the V-shaped straightening roll casting mold is used, molten metal enters a cavity through a runner, the inner wall of the cold mold body 10 has a forming protrusion, and a V-shaped groove may be formed by the forming protrusion during casting, or a machining allowance of a subsequent turning process is minimized. When the casting precision satisfies the use, can remove subsequent turning process from. The cooling pipe assembly is buried in the forming bulge, a cooling medium is introduced into the cooling pipe assembly during casting, the heat of the cold type body 10 can be taken away, the temperature of the cold type body 10 penetrating into the center part of a casting (namely the part for forming the bottom of the V-shaped groove by casting) is reduced, the cooling speed of the whole V-shaped groove part of the straightening roller is consistent, the hardness of the working surface (the V-shaped groove) of the straightening roller obtained by casting is high, the hardness of each position is uniform, and the service life of the straightening roller is prolonged.
The die cavity is used for forming the straightening roll during casting, and the shape of the forming bulge corresponds to the shape of the working surface of the straightening roll or the shape of angle steel needing to be rolled. As shown in fig. 1 and 2, the cooling tube assembly may be one or more copper tubes or stainless steel tubes, which are directly embedded at corresponding positions during the casting process of the cold mold body 10, and are integrally formed with the cold mold body 10, so that the heat transfer effect is good. During casting, an infinite chilled working layer is formed by chilling of the cold type body 10 in the solidification process of a casting, the hardness requirement of the working surface of the straightening roll can be met without carrying out a heat treatment process, the product quality is improved, the production flow is simplified, and the production cost is saved.
As shown in fig. 1 and 2, the sand mold and the cold body 10 together form a cavity in the embodiment of the present invention, and specifically, the sand mold may include a lower sand mold 60 located below the cold body 10, a hollow core 70 located in the middle of the cold body 10, and an upper sand mold 80 located above the cold body 10.
The lower sand mold 60 is provided with an ingate 61, a cross gate 62 and a first sprue 63 which are communicated, the central core 70 is provided with a second sprue 71, the inner wall of the second sprue 71 is smoothly and transitionally connected with the inner wall of the first sprue 63, the upper sand mold 80 is provided with a third sprue 81, the third sprue 81 is smoothly and transitionally connected with the inner wall of the second sprue 71, and the upper sand mold 80 can also be provided with a plurality of risers 82 communicated with the cavity. The third sprue 81, the second sprue 71, the first sprue 63, the runner 62, and the ingate 61 form runners. During casting, molten metal enters from the third sprue 81, and enters the cavity through the third sprue 81, the second sprue 71, the first sprue 63, the runner 62, and the ingate 61. The manufacturing method of the V-shaped straightening roll casting die comprises the following steps:
manufacturing a cold type body 10; the sand mould 60 is manufactured by moulding sand according to the process specification, and an ingate 61, a cross gate 62 and a first sprue 63 are manufactured at the same time; manufacturing a middle hole core 70, and manufacturing a second sprue 71 in the middle position of the middle hole core 70 to enable the inner wall of the second sprue 71 to smoothly transit with the inner wall of the first sprue 63; manufacturing an upper sand mold 80 by using molding sand according to the process specification, and manufacturing a third sprue 81 at the same time, so that the inner walls of the third sprue 81 and the second sprue 71 are in smooth transition; and (3) assembling the sand mold 60, the middle hole core 70, the cold mold body 10 and the upper sand mold 80 in sequence in a preset positioning mode to obtain the V-shaped straightening roll casting mold.
Referring to fig. 3 and 4, in some possible embodiments, the cold body 10 includes: a first connection body 11 having a semicircular ring shape, the inner wall of which has a first protrusion for forming a V-shaped groove of a straightening roll; the first cooling unit 12 is embedded in the first protruding portion around the annular inner wall of the first connecting body 11, one end of the first cooling unit extends out of the first connecting body 11 to form a first inlet, and the other end of the first cooling unit extends out of the first connecting body 11 to form a first outlet; the second connecting body 13 is in a semicircular ring shape, the inner wall of the second connecting body is provided with a second bulge part used for forming a V-shaped groove of the straightening roller, the first connecting body 11 and the second connecting body 13 are spliced to form a cavity, and the first bulge part and the second bulge part are spliced to form a forming bulge; the second cooling unit 14 is embedded in the second protruding portion around the annular inner wall of the first connecting body 11, one end of the second cooling unit extends out of the second connecting body 13 to form a second inlet, the other end of the second cooling unit extends out of the second connecting body 13 to form a second outlet, the first cooling unit 12 and the second cooling unit 14 jointly form a cooling pipe assembly, when the first outlet is communicated with the second inlet, the first inlet is a cooling inlet, and the second outlet is a cooling outlet; when the first inlet and the second inlet are not communicated, the first inlet and the second inlet are both cooling inlets, and the first outlet and the second outlet are both cooling outlets.
In the embodiment, the cold type body 10 is formed by oppositely combining the first connecting body 11 and the second connecting body 13, and when the cold type body is used, the first connecting body 11 and the second connecting body 13 are detachably connected through connecting pieces such as bolts, so that the first connecting body 11 and the second connecting body 13 can be conveniently separated from the straightening roll casting. Meanwhile, compared with an integrated structure, the split structure is more convenient to check the quality of the inner surface of the cavity before use, the probability of casting defects can be reduced, the defects on the surface of the straightening roll after casting is finished due to cracks, pits and the like on the inner surface of the cavity are avoided, and the risk of defective products is reduced.
Referring to fig. 3 and 4, arrows indicate the flowing direction of the cooling medium, and the two forms of the first cooling unit 12 and the second cooling unit 14 connected in series and in parallel are selected according to actual situations in practical use.
Referring to FIG. 2, in some possible embodiments, the first cooling unit 12 and the second cooling unit 14 are identical in structure and each include a plurality of cooling tube elements spaced along the edge profile of the shaped projection, each cooling tube element being spaced apart from the outer surface of the shaped projection by the same distance.
The first cooling unit 12 and the second cooling unit 14 in this embodiment each comprise a plurality of cooling tube elements 121 arranged at intervals along the edge profile of the profiled bead. On one hand, the cooling pipe elements 121 can increase the heat exchange area and improve the cooling effect, and the straightening rollers can form an infinite chilled working surface (V-shaped groove); on the other hand, the distances from each cooling pipe element 121 to the outer surface of the forming bulge are the same, so that the cooling speed of the corresponding part of the whole working surface (V-shaped groove) of the straightening roll is consistent during casting, the hardness difference of the working surface can be controlled within a small range, and the service life of the straightening roll can be prolonged. In a specific embodiment, tests show that the hardness of the bottom position of the straightening roll groove manufactured by the V-shaped straightening roll casting die provided by the invention is improved by about 17% compared with that of sand casting without a cooling pipe assembly, and the hardness difference of different parts of the working surface of the straightening roll is only 3%.
Referring to fig. 1 to 5, in a second aspect, an embodiment of the present invention provides a V-roll casting cooling apparatus 1, including: the V-shaped straightening roll casting mold as in any of the above embodiments; a pumping assembly 20 having a liquid inlet 21 in communication with the cooling inlet, and a liquid outlet 22; one end of the cooling component 30 is communicated with the cooling outlet, and the other end of the cooling component 30 is communicated with the liquid inlet 21 and is used for cooling the cooling medium in the cooling component 30; wherein, the pumping assembly 20, the cooling tube assembly and the cooling assembly 30 are sequentially communicated to form a circulating cooling pipeline.
In the embodiment of the invention, the pumping assembly 20, the cooling pipe assembly and the cooling assembly 30 are sequentially communicated to form a circulating cooling pipeline, a cooling medium flows in the circulating cooling pipeline, so that the heat of the cold type body 10 can be continuously taken away during casting, the temperature of the cold type body 10 penetrating into the center part of a casting is reduced, the cooling speed of the whole V-shaped groove part of the straightening roll is consistent, the hardness of the working surface (V-shaped groove) of the cast straightening roll is high, the hardness distribution is uniform, and the service life of the straightening roll is prolonged.
The pumping assembly 20 is used for conveying a cooling medium (specifically, water, heat conducting oil, or other liquid capable of conducting heat), and the pumping assembly 20 may specifically be in the form of a gear pump, a plunger pump, or the like. The cooling assembly 30 is used to cool the cooling medium flowing out from the cooling outlet, and the cooling assembly 30 may specifically adopt the forms of cooling by a radiator, cooling by air, cooling by water, and the like, which is not limited in this embodiment of the present invention.
It should be noted that, in order to facilitate monitoring of the temperature and the pressure of the pipeline, the circulating cooling pipeline may further be provided with elements such as a thermometer, a temperature sensor, a pressure gauge, and a pressure sensor at corresponding positions as required. In order to prevent the cooling medium from flowing back, a check valve may be further disposed between the cooling outlet and the temperature reduction assembly 30.
Referring to fig. 5 and 6, arrows indicate the flow direction of the cooling liquid, in some possible embodiments, the V-roll casting cooling device 1 further includes a heating assembly 40 communicating with the liquid outlet 22 and the cooling inlet, and the heating assembly 40 includes: a first tube 41 having one end communicating with the liquid outlet 22 and the other end communicating with the cooling inlet; an electromagnetic coil 42 wound around the first pipe 41; and a heating tube 43 disposed in the first tube 41 along the axial direction of the first tube 41, wherein a central hole of the heating tube 43 forms a flow passage of the cooling medium, or a flow passage of the cooling medium is formed between the outer wall of the heating tube 43 and the inner wall of the central hole of the first tube 41 and the central hole of the heating tube 43 respectively.
This embodiment is provided by providing a heating element 40 in front of the cooling inlet, the heating element 40 being adapted to heat the cooling medium (cooling liquid) passing therethrough to a temperature close to the boiling point. Since the cooling medium is heated to a temperature close to the boiling point before entering the cold type body 10, the cooling medium is rapidly vaporized after entering the cold type body 10 and absorbing heat, and absorbs a large amount of heat during vaporization, thereby cooling the cold type body 10.
The cooling medium flows to the cooling assembly 30 from the cooling inlet in a gas state or a gas-liquid two-phase flow state, is reduced in temperature in the cooling assembly 30 and returns to a liquid state again, and then is conveyed into the heating assembly 40 through the pumping assembly 20 again to form a circulating cooling pipeline. Specifically, the heating assembly 40 may adopt a heating wire heating mode, an electromagnetic induction heating mode, a heat pump heating mode, and the like.
This embodiment preheats the coolant who gets into cold type body 10 through heating element 40, and the coolant after the heating reduces with the difference in temperature of cold type body 10, and the difficult emergence of cold type body 10 surface is cracked, has improved the life of cold type body 10 to a certain extent. Meanwhile, the surface of the cold type body 10 is not easy to crack, the cooling pipe element 121 can be arranged closer to the surface of the cold type body 10, the cooling effect is better, and the hardness of the working surface of the straightening roll after casting can be further improved.
In this embodiment, the first tube 41 is an insulating tube, such as a ceramic tube, the heating tube 43 is a metal tube, such as a steel tube, the electromagnetic coil 42 is energized to heat the heating tube 43, and the cooling medium flowing through the heating tube 43 can absorb heat of the heating tube 43 and then enter the cold-type body 10. In order to make the cooling medium heated more fully when flowing through the heating tube 43, a plurality of heat exchange fins may be further disposed on the heating tube 43. In order to monitor the heating effect, a temperature sensor may be disposed at one end of the first pipe 41 communicating with the cooling inlet to detect whether the cooling medium reaches a temperature close to the boiling point.
Referring to fig. 5 and 6, in some possible embodiments, the inner diameter of the central hole of the end of the first tube 41 communicating with the cooling inlet is smaller than the inner diameter of the central hole of the end of the first tube 41 communicating with the liquid outlet 22.
The end of the first pipe 41 communicating with the cooling inlet forms a throttling channel 411, and under the action of the pumping assembly 20, the pipeline pressure between the throttling channel 411 and the pumping assembly 20 (mainly the internal pressure of the heating assembly 40) is greater than the pipeline pressure at other positions of the circulating cooling pipeline. Because the setting of throttle passage 411 makes heating element 40 internal pressure big, the boiling point when cooling medium is in heating element 40 is high, even heat up to the temperature of neighbouring boiling point (this boiling point refers to the boiling point of cooling medium when in cold type body 10) can not take place local boiling phenomenon, guarantees that the cooling medium that is in heating element 40 is the liquid all the time, avoids taking place the air lock in the pipeline. Specifically, the inner diameter of the throttle passage 411 may be 0.8 to 3 mm.
Referring to fig. 5 and 7, in some possible embodiments, the V-roll casting cooling apparatus 1 further includes a regulator valve assembly 50 disposed between the pumping assembly 20 and the heating assembly 40, the regulator valve assembly 50 including: a housing 51 having a regulation chamber 511, one end of the housing 51 being provided with a first communication hole 512 for communicating the regulation chamber 511 with a cooling circulation pipeline, and the other end of the housing 51 being provided with a regulation hole for communicating the regulation chamber 511; a piston 52 slidably disposed within the regulation chamber 511; an elastic member 53 disposed in the adjustment chamber 511, and having one end abutting against one end of the piston 52 away from the first through hole 512; and an adjusting member 54 disposed in the adjusting hole in a screw-fit manner, and having one end abutting against one end of the elastic member 53 away from the piston 52.
The regulator valve assembly 50 in this embodiment is capable of regulating the line pressure between the pumping assembly 20 and the throttling passage 411, with the higher the pressure, the higher the boiling point of the cooling medium in the heating assembly 40. When the cooling device is used, a cooling medium is filled in a cavity enclosed by the piston 52, the inner wall of the adjusting chamber 511 and the inner wall of the first communication hole 512, the adjusting piece 54 may be a screw rod, the adjusting piece 54 is rotated to move the piston 52 downwards, the pressure in the pipeline is increased, the adjusting piece 54 is rotated to move the piston 52 upwards under the pushing of the pressure of the cooling medium, and the pressure in the pipeline is reduced. The elastic member 53 is configured to prevent the pressure in the pipeline from bursting beyond a tolerance range, and the elastic member 53 may be one or more springs.
Referring to fig. 8, in some possible embodiments, the cooling assembly 30 includes: one end of the second pipe body 31 is communicated with the cooling outlet, and the other end is communicated with the liquid inlet 21; a first partition 32 provided in the second pipe 31 adjacent to one end of the second pipe 31; the second partition plate 33 is arranged in the second pipe body 31 and close to the other end of the second pipe body 31, the inner walls of the second partition plate 33, the first partition plate 32 and the second pipe body 31 jointly enclose to form a cooling cavity, a cooling inlet 36 and a cooling outlet 37 which are communicated with the cooling cavity are formed in the second pipe body 31, and cooling media enter the cooling cavity from the cooling inlet 36 and flow out from the cooling outlet; the cooler is communicated with the cooling inlet 36 and used for conveying cooling air or cooling water into the cooling chamber through the cooling inlet 36, and the cooling air or the cooling water flows out of the cooling chamber through the cooling outlet 37; and a plurality of third tubes 34, which are partially accommodated in the cooling chamber and have two ends respectively penetrating through the first partition 32 and the second partition 33.
The cooling assembly 30 in this embodiment is used for cooling the liquid, gas or gas-liquid two-phase cooling medium flowing through the third pipe 34, so that the cooling medium returns to the liquid state. The inner walls of the first partition plate 32, the second partition plate 33 and the second pipe body 31 enclose to form a cooling chamber, cooling medium flows in the third pipe body 34, and the cooling medium is separated from cooling air or cooling water through the third pipe body 34. The cooler can be to continuously carrying cooling air or cooling water in the cooling cavity, and cooling air or cooling water carry out the heat transfer with third body 34, reach the effect to the cooling medium cooling. The cooler may be a water pump communicating with the water tank or an air conditioner having a cooling function.
Referring to fig. 9, as another embodiment of the cooling assembly 30, in addition to the above structure, the cooling assembly 30 further includes a spraying pipe 35 disposed at the upper portion of the cooling chamber and communicated with the cooling inlet 36.
Cooling water that this embodiment carried enters into the shower behind the cooling entry 36, because the cooling medium who gets into third body 34 from the cooling body probably is gaseous state or gas-liquid two-phase state, gaseous cooling medium can get into the third body 34 that is located the third cavity top, shower 35 sets up the upper portion at the cooling cavity in this embodiment, cooling water is unrestrained in the cooling cavity from top to bottom, flow out from the cooling export 37 with cooling cavity lower part intercommunication, can fully cool down gaseous cooling medium, make it change into liquid by the gaseous state, then carry by pumping module 20 and heat again in heating element 40.
Referring to fig. 1 and 2, in a third aspect, an embodiment of the present invention provides a V-shaped straightening roll casting method, in which a V-shaped straightening roll is prepared by using the V-shaped straightening roll casting cooling device 1 in any one of the above embodiments, including the following steps:
a cooling medium with preset flow, preset pressure and preset temperature is introduced into the cooling pipe assembly of the cold type body 10 through the pumping assembly 20; pouring molten metal into the pouring channel within a first preset time when the pumping assembly 20 continuously works, so that the molten metal fills the cavity through the pouring channel, and obtaining a primary casting body after a second preset time; and opening a V-shaped straightening roll casting mold, and taking out the primary casting body to obtain the V-shaped straightening roll.
The preset flow rate of "introducing the cooling medium with the preset flow rate, the preset pressure, and the preset temperature into the cooling pipe assembly of the cold-type body 10 through the pumping assembly 20" may be 50 tons/hour, the preset pressure may be 1 mpa, and the preset temperature may be 40-130 degrees celsius, and specifically may be 40-50 degrees celsius. The first preset time of the "first preset time for which the pumping assembly 20 is continuously operated" may be a time period from 20 to 30 minutes before the molten metal is cast to 20 to 30 minutes after the molten metal is cast. Of course, the above ranges are only for one embodiment, and are not limited to the V-roll casting method, and the preset flow rate, the preset pressure, and the preset temperature may be in other ranges.
Before the step of pouring molten metal into the pouring channel, the inner wall of the cold type body 10 is brushed with alcohol-based graphite paint.
The method comprises the steps of smelting molten metal before the step of pouring molten metal into a pouring channel, carrying out spheroidization, inoculation and stokehole inspection after the molten metal is discharged from a furnace, and casting after the molten metal is qualified, wherein the casting temperature is 1300-1320 ℃.
The second predetermined time in "obtaining the primary casting body after the second predetermined time" may be 48 hours after completion of casting the molten metal.
And after the step of pouring molten metal into the pouring gate, opening the die after keeping the temperature for 48 hours to obtain a primary casting body, and performing the working procedures of polishing, stress relief annealing, detection and the like on the primary casting body to obtain the finished product straightening roll.
The V-shaped straightening roll casting method provided by the invention has the advantages that the straightening roll is molded in the cavity during casting, under the action of the V-shaped straightening roll casting cooling device 1, the internal uniform structure and the carbide content with similar quantity can be obtained near the working surface (V-shaped groove) of the straightening roll, the integral hardness of the working surface of the straightening roll is high, the hardness of each position of the working surface is uniform, the wear resistance is good, and the service life of the straightening roll can be prolonged.
In a control test, the bottom structure of the V-shaped groove of the straightening roll produced by the existing sand casting method is fine pearlite, 20-25% carbide and the hardness (Shore hardness) is HSD48-52, and the upper edge structure of the V-shaped groove is fine pearlite, 30-35% carbide and the hardness is HSD 58-62. When large-scale angle steel is straightened, the main contact surface of the straightening roll and the angle steel is positioned at the bottom of the V-shaped groove, and if the bottom of the V-shaped groove has thick texture, low carbide content and low hardness, the service life of the straightening roll is directly influenced.
When the casting method of the straightening roll is adopted, the hardness difference of different parts of the V-shaped groove of the straightening roll is controlled within 3 percent, the hardness of the bottom of the V-shaped groove is improved to HSB56-62 from the original hardness HSB48-52, the hardness is improved by nearly 18 percent compared with the original casting method, the hardness HSD58-61 of the upper edge of the V-shaped groove is equal to the hardness of the original manufacturing method, and the service life of the straightening roll is greatly prolonged.
It is to be understood that, in the foregoing embodiments, various parts may be freely combined or deleted to form different combination embodiments, and details of each combination embodiment are not described herein again, and after this description, it can be considered that each combination embodiment has been described in the present specification, and can support different combination embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims (10)

  1. V-arrangement straightener roll casting mould, its characterized in that includes:
    the cooling pipe assembly is characterized by comprising a cold type body, wherein the cold type body is annular, the annular inner wall of the cold type body is provided with a forming bulge used for forming a V-shaped groove of a straightening roller, a cooling pipe assembly surrounding the annular inner wall of the cold type body is embedded in the forming bulge, one end of the cooling pipe assembly extends out of the cold type body to form a cooling inlet, and the other end of the cooling pipe assembly extends out of the cold type body to form a cooling outlet; and
    and the sand mold and the cold mold body jointly form a cavity and are provided with a pouring gate communicated with the cavity.
  2. 2. The V-roll casting mold as recited in claim 1, wherein the cold-type body comprises:
    the first connecting body is in a semicircular ring shape, and the inner wall of the first connecting body is provided with a first bulge part for forming a V-shaped groove of the straightening roller;
    the first cooling unit is embedded in the first protruding part around the annular inner wall of the first connecting body, one end of the first cooling unit extends out of the first connecting body to form a first inlet, and the other end of the first cooling unit extends out of the first connecting body to form a first outlet;
    the second connecting body is in a semicircular ring shape, the inner wall of the second connecting body is provided with a second bulge part used for forming a V-shaped groove of the straightening roller, the first connecting body and the second connecting body are spliced to form the cavity, and the first bulge part and the second bulge part are spliced to form the forming bulge; and
    the second cooling unit is embedded in the second protruding part around the annular inner wall of the first connecting body, one end of the second cooling unit extends out of the second connecting body to form a second inlet, and the other end of the second cooling unit extends out of the second connecting body to form a second outlet;
    the first cooling unit and the second cooling unit together form the cooling tube assembly, when the first outlet and the second inlet are communicated, the first inlet is the cooling inlet, and the second outlet is the cooling outlet; when the first inlet and the second inlet are not communicated, both the first inlet and the second inlet are the cooling inlet, and both the first outlet and the second outlet are the cooling outlet.
  3. 3. The V-roll casting mold according to claim 2, wherein the first cooling unit and the second cooling unit are identical in structure and each include a plurality of cooling tube elements spaced along an edge profile of the forming boss, each cooling tube element being at an equal distance from an outer surface of the forming boss.
  4. V-arrangement straightener roll casting cooling device, its characterized in that includes:
    the V-shaped straightening roll casting mold according to any one of claims 1 to 3;
    the pumping assembly is provided with a liquid inlet communicated with the cooling inlet and a liquid outlet; and
    one end of the cooling component is communicated with the cooling outlet, and the other end of the cooling component is communicated with the liquid inlet and used for cooling a cooling medium in the cooling component;
    the pumping assembly, the cooling pipe assembly and the cooling assembly are sequentially communicated to form a circulating cooling pipeline.
  5. 5. The V-roll casting cooling device of claim 4, further comprising a heating assembly in communication with the liquid outlet and the cooling inlet, the heating assembly comprising:
    one end of the first pipe body is communicated with the liquid outlet, and the other end of the first pipe body is communicated with the cooling inlet;
    the electromagnetic coil is wound outside the first pipe body; and
    and the heating tube is arranged in the first tube body along the axial direction of the first tube body, and a central hole of the heating tube forms a flow channel of the cooling medium, or the flow channel of the cooling medium is formed between the outer wall of the heating tube and the inner wall of the central hole of the first tube body and between the outer wall of the heating tube and the inner wall of the central hole of the first tube body respectively.
  6. 6. The V-roll casting cooling device as recited in claim 5, wherein an inner diameter of a center hole of an end of the first tube communicating with the cooling inlet is smaller than an inner diameter of a center hole of an end of the first tube communicating with the liquid outlet.
  7. 7. The V-roll casting cooling device of claim 5 further comprising a conditioning valve assembly disposed between the pumping assembly and the heating assembly, the conditioning valve assembly comprising:
    the cooling device comprises a shell, a first cooling device and a second cooling device, wherein the shell is provided with a regulating cavity, one end of the shell is provided with a first through hole which is communicated with the regulating cavity and the cooling circulation pipeline, and the other end of the shell is provided with a regulating hole which is communicated with the regulating cavity;
    the piston is slidably arranged in the adjusting cavity;
    the elastic piece is arranged in the adjusting cavity, and one end of the elastic piece is abutted against one end, far away from the first communication hole, of the piston; and
    the adjusting piece is arranged in the adjusting hole in a threaded fit mode, and one end of the adjusting piece is abutted to one end, far away from the piston, of the elastic piece.
  8. 8. The V-roll casting cooling device of claim 4, wherein the temperature reduction assembly comprises:
    one end of the second pipe body is communicated with the cooling outlet, and the other end of the second pipe body is communicated with the liquid inlet;
    the first partition board is arranged in the second pipe body and close to one end of the second pipe body;
    the second partition board is arranged in the second pipe body and is close to the other end of the second pipe body, the inner walls of the second partition board, the first partition board and the second pipe body jointly enclose to form a cooling cavity, and a cooling inlet and a cooling outlet which are communicated with the cooling cavity are formed in the second pipe body;
    the cooler is communicated with the cooling inlet and used for conveying cooling air or cooling water into the cooling cavity through the cooling inlet, and the cooling air or the cooling water flows out of the cooling cavity through the cooling outlet; and
    and part of the third pipe bodies are accommodated in the cooling cavity, and two ends of the third pipe bodies respectively penetrate through the first partition plate and the second partition plate.
  9. 9. The V-roll casting cooling device according to claim 8, wherein the cooling assembly further comprises a shower pipe disposed at an upper portion of the cooling chamber and communicating with the cooling inlet.
  10. The V-roll casting method, characterized in that the V-roll is prepared using the V-roll casting cooling device as claimed in any one of claims 4 to 9, comprising the steps of:
    introducing a cooling medium with preset flow, preset pressure and preset temperature into the cooling pipe assembly of the cold type body through the pumping assembly;
    pouring molten metal into the pouring channel within a first preset time when the pumping assembly continuously works, so that the molten metal fills the cavity through the pouring channel, and obtaining a primary casting body after a second preset time;
    and opening the V-shaped straightening roll casting mold, and taking out the primary casting body to obtain the V-shaped straightening roll.
CN202111673948.XA 2021-12-31 2021-12-31 V-shaped straightening roll casting mold, casting cooling device and casting method Pending CN114406193A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111673948.XA CN114406193A (en) 2021-12-31 2021-12-31 V-shaped straightening roll casting mold, casting cooling device and casting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111673948.XA CN114406193A (en) 2021-12-31 2021-12-31 V-shaped straightening roll casting mold, casting cooling device and casting method

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Publication Number Publication Date
CN114406193A true CN114406193A (en) 2022-04-29

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE876748C (en) * 1940-04-21 1953-05-18 Deutsche Edelstahlwerke Ag Process for the rapid cooling of highly heated bodies
JP2000167656A (en) * 1998-12-08 2000-06-20 Honda Motor Co Ltd Method for cooling metallic mold
CN202343920U (en) * 2011-12-06 2012-07-25 宁波灿东模具技术有限公司 Water mist cooling device for hub casting
CN203281820U (en) * 2013-05-28 2013-11-13 江苏东方龙机车集团有限公司 Hub casting mold able to optimize cooling effect
CN103862025A (en) * 2012-12-13 2014-06-18 本田技研工业株式会社 Cooling apparatus for casting mold and cooling method for casting mold
CN206241206U (en) * 2016-12-07 2017-06-13 浙江六和轻机械有限公司 A kind of aluminum alloy casting hub full water cooling but device
CN211276445U (en) * 2019-12-04 2020-08-18 河北津西钢铁集团重工科技有限公司 Roller sheet casting device
KR102191507B1 (en) * 2019-09-20 2020-12-15 한국생산기술연구원 Mold cooling method and system for low pressure casting
CN213104463U (en) * 2020-09-10 2021-05-04 沧州亿宸金属轧制设备有限公司 Vertical roll cold type device convenient to cool

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE876748C (en) * 1940-04-21 1953-05-18 Deutsche Edelstahlwerke Ag Process for the rapid cooling of highly heated bodies
JP2000167656A (en) * 1998-12-08 2000-06-20 Honda Motor Co Ltd Method for cooling metallic mold
CN202343920U (en) * 2011-12-06 2012-07-25 宁波灿东模具技术有限公司 Water mist cooling device for hub casting
CN103862025A (en) * 2012-12-13 2014-06-18 本田技研工业株式会社 Cooling apparatus for casting mold and cooling method for casting mold
CN203281820U (en) * 2013-05-28 2013-11-13 江苏东方龙机车集团有限公司 Hub casting mold able to optimize cooling effect
CN206241206U (en) * 2016-12-07 2017-06-13 浙江六和轻机械有限公司 A kind of aluminum alloy casting hub full water cooling but device
KR102191507B1 (en) * 2019-09-20 2020-12-15 한국생산기술연구원 Mold cooling method and system for low pressure casting
CN211276445U (en) * 2019-12-04 2020-08-18 河北津西钢铁集团重工科技有限公司 Roller sheet casting device
CN213104463U (en) * 2020-09-10 2021-05-04 沧州亿宸金属轧制设备有限公司 Vertical roll cold type device convenient to cool

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