CN115121779A - Centrifugal jet forming device capable of adjusting axial size of annular blank - Google Patents

Centrifugal jet forming device capable of adjusting axial size of annular blank Download PDF

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Publication number
CN115121779A
CN115121779A CN202210757064.0A CN202210757064A CN115121779A CN 115121779 A CN115121779 A CN 115121779A CN 202210757064 A CN202210757064 A CN 202210757064A CN 115121779 A CN115121779 A CN 115121779A
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annular
centrifugal
metal
cooling water
water
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CN115121779B (en
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魏世忠
李鹏
雷贤卿
杨璐
徐流杰
毛丰
江涛
徐照宁
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Henan University of Science and Technology
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Henan University of Science and Technology
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/22—Dies; Die plates; Die supports; Cooling equipment for dies; Accessories for loosening and ejecting castings from dies
    • B22D17/2218—Cooling or heating equipment for dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • B22D17/20—Accessories: Details
    • B22D17/30—Accessories for supplying molten metal, e.g. in rations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/02—Making metallic powder or suspensions thereof using physical processes
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/10—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying using centrifugal force
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The invention relates to a centrifugal jet forming device capable of adjusting the axial size of an annular blank, which comprises an annular die and a centrifugal atomizer, wherein the annular die can do axial reciprocating motion under the driving of a driving device, an adjusting device for stopping and positioning the upper end face of the blank is further arranged on the inner side of the upper part of the annular die, the adjusting device comprises an annular baffle plate with the outer diameter consistent with the inner diameter of the annular die, the annular baffle plate is fixed in the annular die through an adjusting bolt, and the axial position of the annular baffle plate in the annular die can be adjusted through the adjusting bolt, so that the axial size of the annular die can be adjusted. The invention effectively ensures the requirement of the axial size of the annular blank formed by centrifugal injection, can enrich the size specification of the annular blank formed by centrifugal injection, reduces the labor intensity, saves the tooling manufacturing cost and improves the utilization rate of injection forming equipment.

Description

Centrifugal jet forming device capable of adjusting axial size of annular blank
Technical Field
The invention belongs to the field of metal spray deposition, and particularly relates to a centrifugal spray forming device capable of adjusting the axial dimension of an annular blank.
Background
With the development of the mechanical manufacturing industry, the petrochemical industry, the wind power industry, the boiler industry and other industries, the requirements of the related annular parts on the aspects of specification, size, service conditions, technical indexes and the like are continuously increased. For example, a bearing is generally a key component in equipment, and a bearing ring having an annular structure is required to have high dimensional accuracy of the structure and to have excellent comprehensive properties such as toughness, wear resistance, fatigue resistance, and low temperature resistance. At present, most of domestic methods for manufacturing annular blanks are cast, the casting depends on the flowing of liquid, the defects of shrinkage porosity and shrinkage cavity of the blanks can also occur when a melt is solidified, the blank performance is poor, and particularly the method is particularly remarkable for the defects of low strength, short service life, long period, high cost, poor quality and the like of a large-scale annular casting process.
In response to the problems in the casting of ring-shaped blanks, centrifugal spray forming has emerged, in which molten metal or alloy is granulated by mechanical centrifugal atomization in an inert atmosphere and sprayed directly onto a relatively cold mold, causing impingement, adhesion, solidification and formation of deposits which can be processed by various densification to give materials with excellent properties.
However, the existing centrifugal spray forming technology does not have the advantage that the axial size of the annular blank can be adjusted, and when workpieces with different axial sizes need to be prepared, different dies need to be replaced, so that the production and the use are not facilitated.
Disclosure of Invention
The invention aims to provide a centrifugal injection forming device capable of adjusting the axial dimension of an annular blank, so that the same die can be suitable for preparing workpieces with various axial dimensions, and the requirements of production and use are met.
The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme. The centrifugal injection molding device capable of adjusting the axial size of the annular blank comprises an annular die and a centrifugal atomizer, wherein the annular die can reciprocate axially under the driving of a driving device, an adjusting device for stopping and positioning the upper end face of the blank is further arranged on the inner side of the upper portion of the annular die, the adjusting device comprises an annular baffle plate with the outer diameter consistent with the inner diameter of the annular die, the annular baffle plate is fixed in the annular die through an adjusting bolt, and the axial position of the annular baffle plate in the annular die can be adjusted through the adjusting bolt, so that the axial size of the annular die is adjusted.
The object of the present invention and the technical problems solved thereby can be further achieved by the following technical measures.
In the centrifugal injection molding device capable of adjusting the axial size of the annular blank, the adjusting bolt is fixed to the upper end of the annular mold through the pressure plate.
In the centrifugal injection molding device capable of adjusting the axial size of the annular blank, one end of the pressure plate is fixed on the upper end surface of the annular mold, and the other end of the pressure plate is suspended in the inner hole of the annular mold and fixedly connected with the adjusting bolt.
In the centrifugal injection molding device capable of adjusting the axial size of the annular blank, two positioning holes are distributed at intervals along the length direction of the pressure plate, one of the positioning holes is matched with the fixing bolt to fix the pressure plate on the outward-turned edge of the annular mold, the other positioning hole is penetrated by the adjusting bolt, and the nut screwed on the adjusting bolt is tightly pressed on the pressure plate. The centrifugal injection molding device capable of adjusting the axial dimension of the annular blank is characterized in that the annular mold can also perform rotary motion under the driving of the driving device.
The centrifugal spray forming device capable of adjusting the axial dimension of the annular blank is characterized in that the distance between the outer diameter and the inner diameter of the annular baffle is not less than the thickness of a workpiece to be prepared.
In the centrifugal spray forming device capable of adjusting the axial size of the annular blank, the centrifugal atomizer comprises a centrifugal disc and a connecting sleeve, and a cavity is formed below the disc surface of the centrifugal disc for bearing the metal liquid; the connecting sleeve can transmit rotary power to the centrifugal disc and can enable the cavity of the centrifugal disc to be filled with flowing cooling water, and when the thickness of a solid layer formed by solidifying metal liquid on the disc surface reaches a set value, the cooling water in the cavity can establish stable heat conduction with the metal liquid above the solid layer.
In the centrifugal spray forming device capable of adjusting the axial dimension of the annular blank, when the cooling water and the metal liquid establish steady-state heat conduction, the centrifugal disc and the solid layer have the following relationship:
Figure BDA0003722930540000021
wherein k is Gold (Au) Is the thermal conductivity of the metal of the solid layer, k Dish Is the thermal conductivity of the centrifugal disk, H Gold (Au) Set thickness for solid layer metal, H Dish Is the thickness of the surface of the centrifugal disc T Melting Is the metal melting point temperature, T Fixing device Is the temperature between the solid layer and the surface of the centrifugal disc, T Water (W) The highest temperature of the cooling water.
In the centrifugal spray forming device capable of adjusting the axial dimension of the annular blank, the flow rate of the cooling water is calculated by the following formula:
the flow rate of the cooling water is quantified according to a heat conduction formula,
Figure BDA0003722930540000022
where ρ is Water (W) Density of cooling water, c Water (W) Is the specific heat capacity of cooling water, Q Water (I) For the flow of cooling water, T 0 Is the initial temperature of the cooling water, S Disc The surface area of the centrifugal pan;
the area of the centrifugal disc is calculated,
Figure BDA0003722930540000023
wherein d is Dish The diameter of the centrifugal disc;
and (3) substituting the formula (2) into the formula (1) to obtain the cooling water flow.
In the centrifugal spray forming device capable of adjusting the axial dimension of the annular blank, the flow rate of the liquid metal can be obtained by the following formula: 0.5 rho Gold (Au) c Gold (Au) Q Gold (Au) △T＝ρ Water (W) c Water (W) Q Water (W) (T Water (W) -T 0 )
Wherein ρ Gold (Au) Is the density of the metal, c Gold (Au) Is the specific heat capacity of the metal, Q Gold (Au) The flow rate of the metal, and Δ T is the degree of superheat of the metal.
Compared with the prior art, the invention has obvious advantages and beneficial effects. By means of the technical scheme, the invention can achieve considerable technical progress and practicability, has wide industrial utilization value and at least has the following advantages:
the invention uses bolts and nuts to fix the pressure plate on the annular die, the adjusting device is connected with the die through the pressure plate, and the axial size of the annular workpiece can be realized through the height-adjustable device.
The invention can achieve the following positive effects: the invention effectively ensures the requirement of the axial size of the annular blank formed by centrifugal injection, can enrich the size specification of the annular blank formed by centrifugal injection, reduce the labor intensity, save the tooling manufacturing cost, improve the utilization rate of injection forming equipment, and simultaneously, the method has the advantages of near-net forming, compact structure, convenient operation, multiple application occasions, safety, high efficiency and the like.
In addition, the centrifugal disc of the centrifugal atomizer is cooled in a water cooling way, so that molten metal forms a thin metal solid layer on the surface of the centrifugal disc, the liquid metal cannot corrode the centrifugal disc, the pollution of the centrifugal disc to the molten metal liquid can be eliminated, the wettability of metal atomized particles can be enhanced, and the diameter of the atomized particles is smaller. The invention can control the thickness of a solid layer solidified on the surface of the centrifugal disc through the flow of cooling water, further quantize the metal flow of centrifugal injection, establish a balance process among the flow of the cooling water, the metal flow and the thickness of the centrifugal disc to achieve the purpose of protecting the centrifugal disc, and simultaneously improve the quantization basis for designing the size of the centrifugal disc and the size of a cooling water inlet and a cooling water outlet.
Drawings
FIG. 1 is a schematic view of a centrifugal spray forming apparatus capable of adjusting the axial dimension of an annular blank;
FIG. 2 is a schematic illustration of a workpiece being formed in accordance with the present invention;
FIG. 3 is a schematic view of an adjustment device;
FIG. 4 is a bottom view of FIG. 3;
FIG. 5 is a schematic view of an annular mold;
FIG. 6 is a bottom view of FIG. 5;
FIG. 7 is a schematic view of a platen;
FIG. 8 is a bottom view of FIG. 7;
FIG. 9 is a schematic view of a centrifugal plate;
fig. 10 is a schematic structural view of the connecting sleeve;
fig. 11 is a bottom view of the connection sleeve;
FIG. 12 is a schematic diagram of cooling of a centrifugal plate.
[ description of main element symbols ]
1: fixing bolt
2: pressing plate
3: annular mould
4: adjusting device
5: nut
6: centrifugal disc
7: connecting sleeve
8: solid layer
9: water inlet
10: drain hole
a is a workpiece
b centrifugal atomizer
c: flow guide pipe
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be given of the embodiments, structures, features and effects of the centrifugal injection molding apparatus capable of adjusting the axial dimension of the annular blank according to the present invention with reference to the accompanying drawings and preferred embodiments.
Please refer to fig. 1-12, which are schematic structural diagrams of each part of the centrifugal spray forming apparatus capable of adjusting the axial size of the annular blank according to the present invention, the centrifugal spray forming apparatus includes a centrifugal atomizer b and an annular mold 3, the centrifugal atomizer b is located in the annular mold 3 and is coaxially arranged with the annular mold 3, the bottoms of the annular mold 3 and the centrifugal atomizer b are both connected with a driving apparatus, the centrifugal atomizer b rotates by the driving apparatus, and the annular mold 3 reciprocates axially by the driving apparatus. In the embodiment of the present invention, the annular mold 3 can also rotate by the driving device, that is, the annular mold 3 can rotate around the centrifugal atomizer b and can also reciprocate up and down relative to the centrifugal atomizer b.
The upper end of the annular mold 3 is further provided with an adjusting device 4, the adjusting device 4 comprises an annular baffle plate 41 and a plurality of adjusting bolts 42 distributed on the upper end face of the annular baffle plate 41 along the circumferential direction, the adjusting device 4 is fixed in the annular mold 3 through the adjusting bolts 42, the outer diameter of the annular baffle plate 41 of the adjusting device 4 is consistent with the inner diameter of the annular mold 3, and the adjusting device 4 can adjust the axial position of the annular baffle plate 41 in the annular mold 3 by adjusting the length of the upper end of the adjusting bolt 42 extending out of the annular mold 3. Preferably, the width of the annular baffle 41 extending in the radial direction, i.e., the distance between the outer diameter and the inner diameter of the annular baffle 41, is not less than the thickness of the workpiece a to be prepared, i.e., the thickness of the molten metal collected inside the annular die 3. The adjusting device 4 realizes the adjustment of the axial size of the annular die 3 through the stopping and limiting of the lower end surface of the annular baffle 41 facing the upper end surface of the workpiece.
In the embodiment of the present invention, the adjusting device 4 is fixed at the upper part in the annular mold 3 through the pressing plate 2, one end of the pressing plate 2 is fixed on the upper end surface of the annular mold 3, and the other end is connected with the adjusting bolt 42. Specifically, two positioning holes 21 are distributed at intervals along the length direction of the pressure plate 2, one positioning hole is matched with the fixing bolt 1 to fix the pressure plate 2 on the outward turning edge 31 of the annular mold 3, the other positioning hole 21 is opposite to the adjusting bolt 42 of the adjusting device, the adjusting device 4 is moved from bottom to top, the adjusting bolt 42 penetrates through the positioning hole 21 to extend out of the annular mold 3, and the nut 5 screwed on the adjusting bolt 42 is tightly pressed on the upper surface of the pressure plate, so that the fixed connection between the adjusting bolt 42 and the pressure plate is realized. Preferably, the adjusting bolt 42 is provided with two nuts 5, one nut 5 is located above the pressing plate, the other nut 5 is located below the pressing plate 2, and the two pressing plates 5 are both pressed on the pressing plate, so as to enhance the fixation between the adjusting bolt 42 and the pressing plate. In this embodiment, the fixing bolt 1 fixes the pressure plate and the flanging 31 by two nuts, one of which is pressed against the pressure plate and the other one of which is pressed against the bottom of the flanging.
When in work, the annular die 3 is high H 1 As known, to satisfy the height H requirement of the annular workpiece a, only the adjusting bolt and the nut 5 on the height-adjustable device 4 need to be adjusted, so that the length of the adjusting bolt located in the annular die is increased, when the height adjustment value Δ H (i.e. the length of the adjusting bolt in the annular die) satisfies the height H requirement of the workpiece a, i.e. H ═ H 1 Locking the nut 5 to prevent the height adjustment value Δ H from being changed due to vibration or the like during the operation of the centrifugal injection molding apparatus. After the height H of the workpiece a is adjusted, starting a centrifugal atomizer b, then making molten metal flow to the surface of the centrifugal atomizer b from a flow guide pipe c, spraying the molten metal on the surface of the centrifugal atomizer b onto an annular die 3 which makes up-and-down reciprocating motion under the action of centrifugal force, making the annular die 3 make up-and-down reciprocating motion at the moment, making impact, bonding and solidification on the annular die 3 to form the annular workpiece a, and after the spray forming is finished, pressing a pressing plate 2 and the annular workpiece aThe height-adjustable device 4 is removed from the annular die 3, and then the annular workpiece a is taken out.
The centrifugal atomizer b comprises a centrifugal disc 6 and a connecting sleeve 7, wherein the centrifugal disc 6 comprises a disc body 61 and a supporting rod 62, the disc body 61 comprises a disc surface 65 for bearing metal liquid and a first cavity 63 formed below the disc surface, a second cavity 64 extending along the axial direction and communicated with the first cavity 63 is arranged in the supporting rod 62, and the connecting sleeve 7 extends into the second cavity 64 of the supporting rod 62 and is fixedly connected with the supporting rod 62. The connecting sleeve 7 can convey cooling water into the first cavity 63 and the second cavity 64, and can establish steady-state heat conduction with liquid metal on the surface of the solid layer 8 when the metal solid layer 8 with a set thickness is formed on the upper surface of the disc surface 65, so that the thickness of the solid layer is kept constant.
In this embodiment, the support rod 62 and the connecting sleeve 7 are connected and fixed through threads; the tray body 61 and the support rod 62 are integrally formed. The centrifugal disc 6 and the connecting sleeve 7 are coaxially arranged, and the connecting sleeve 7 is connected with a driving device (such as a motor) through other devices, so that the rotary driving of the centrifugal disc 6 is realized.
The connecting sleeve 7 sends fresh cooling water into the second cavity 64 and the first cavity 63 through the water inlet 9 on the connecting sleeve to cool the disk surface 65, and the connecting sleeve 7 is also provided with a drain hole 10 for draining the cooling water in the first cavity 63 and the second cavity 64 to realize the replacement and circulation of the cooling water. That is, the connection sleeve 7 can provide a stable and reliable water cooling system for the centrifugal disk 6, and when the thickness of the metal solid layer 8 formed on the surface of the disk surface 65 reaches a set value, the water cooling system and the liquid metal carried on the surface of the centrifugal disk 6 establish stable heat conduction, so that the solid layer 8 formed by the liquid metal on the surface of the centrifugal disk 6 can be maintained at the set thickness, the temperature of the bottom of the metal liquid film formed by the liquid metal and the top surface of the fixed layer 8 is maintained at the melting point of the metal, at this time, the temperature of the top surface of the metal liquid film can be maintained at the pouring temperature, so that the thickness of the fixed layer 8 cannot be increased, and the fixed layer 8 cannot be re-melted, so that the surface of the centrifugal disk 6 always has a protective layer with a proper thickness, thereby achieving the purpose of spraying high-temperature metal or continuous spraying. Preferably, the set thickness of the solid layer 8 is 0.1 to 2 mm.
In this embodiment, there is one water inlet 9 located in the middle of the connecting sleeve 7 and extending axially, there are multiple water discharge holes 10, which are uniformly distributed around the water inlet 9 and extend axially, the diameter of the water inlet 9 is much larger than that of the water discharge holes 10, and the diameter of the water inlet 9 is equal to the sum of the diameters of all the water discharge holes 10.
The steady state establishment process of the centrifugal disc is calculated as follows, and the heat transfer process according to the one-dimensional steady state problem is known as follows:
Figure BDA0003722930540000061
in the above formula, k Gold (Au) To set the thermal conductivity, k, of the layer metal Dish Is the thermal conductivity of the centrifugal disk, H Gold (Au) The thickness of the solid layer formed for the solidification of the metal is generally set to 0.1-2mm, H Dish Is the thickness of the surface of the centrifugal disc, T Fusion furnace Is the metal melting point temperature, T Fixing device The temperature between the solid layer and the surface of the centrifugal disc is generally 100 ℃ lower than the melting point of metal, and T is Water (W) The maximum temperature of the cooling water is generally 75 to 95 ℃.
The thickness H of the centrifugal disk can be obtained through the heat transfer process of the one-dimensional steady-state problem Dish 。
And after the thickness of the centrifugal disc is obtained, quantifying the flow of the cooling water according to a heat conduction formula.
Figure BDA0003722930540000062
In the above formula, ρ Water (W) Density of cooling water, c Water (W) Is the specific heat capacity of cooling water, Q Water (W) For the flow of cooling water, T 0 The initial temperature of the cooling water is generally 25 ℃, S Dish Is the surface area of the centrifugal disc.
Figure BDA0003722930540000063
In the above formula, d Dish The diameter of the centrifugal disc.
Cooling water Q is obtained Water (W) The size of the cooling water inlet hole can be calculated under the condition of certain flow velocity.
Q Water (I) ＝v Water (W) S Into
Figure BDA0003722930540000064
In the above formula, S Into Is the cross section area of the water inlet hole 9, d Into The diameter of the water inlet hole 9.
Figure BDA0003722930540000065
In the above formula, n is the number of the water discharge holes 10, d Go out The diameter of a single drainage hole 10.
After the flow rate of the cooling water is obtained, the flow rate of the metal flowing to the centrifugal disk 6 through the flow guide pipe c is quantified, and if the heat loss of the liquid metal is half of the superheat degree and is equal to the heat quantity taken away by the cooling water, the flow rate of the liquid metal can be obtained according to the following formula.
0.5ρ Gold (Au) c Gold (Au) Q Gold (Au) △T＝ρ Water (W) c Water (W) Q Water (W) (T Water (W) -T 0 )
In the above formula, ρ Gold (Au) Is the density of the metal, c Gold (Au) Is the specific heat capacity of the metal, Q Gold (Au) The flow rate of the metal, and the degree of superheat of the metal, generally 100 ℃.
Based on the calculation, the invention can control the thickness of the solidified solid layer on the surface of the centrifugal disc through the flow of the cooling water, further quantize the metal flow of the centrifugal injection, establish a balance process among the cooling water flow, the metal flow and the thickness of the centrifugal disc to achieve the purpose of protecting the centrifugal disc, and simultaneously improve the quantization basis for designing the size of the centrifugal disc and the size of a cooling water inlet and outlet.
The following is a specific embodiment, which illustrates the calculation of cooling water flow, metal flow, centrifugal plate thickness, water inlet hole size, and water outlet hole size.
The diameter of the known centrifugal disc 6 is 60 mm; the flow rate of cooling water is 0.4 m/s; the material of the centrifugal disc is pure copper, and the metal liquid flow is aluminum liquid.
The heat transfer process according to the one-dimensional steady-state problem is known as follows:
Figure BDA0003722930540000071
in the above formula, k Gold (Au) The thermal conductivity of the metal of the solid layer is 237W/(m.k); k is a radical of formula Dish The thermal conductivity of the centrifuge disk is 401W/(m.k); h Gold (Au) Setting the thickness of the solid layer metal to be 1mm, and H Dish Thickness of the disc surface portion of the centrifugal disc, T Melting Is the metal melting point temperature and has a value of 660 ℃, T Fixing device The temperature between the solidified layer and the centrifugal disc is 560 ℃, T Water (W) The maximum temperature of the cooling water was 90 ℃.
The thickness of the centrifugal disc can be obtained according to a formula
Figure BDA0003722930540000078
Surface area of the centrifugal disc:
Figure BDA0003722930540000072
and obtaining the cooling water flow according to the one-dimensional steady-state heat conduction.
Figure BDA0003722930540000073
In the above formula, ρ Water (W) Is the density of water and has a value of 998kg/m 3 ，c Water (W) The specific heat capacity of water is 4200J/kg DEG C, Q Water (W) Is the flow rate of water, T 0 The initial temperature of water, value 25 ℃, S Dish The surface area of the centrifugal disc is 2.826X 10 -3 m 2 。
Cooling water flow rate:
Figure BDA0003722930540000074
flow rate of liquid metal:
Figure BDA0003722930540000075
cooling water inlet size:
Figure BDA0003722930540000076
Figure BDA0003722930540000077
in order to facilitate the subsequent part processing and calculation, the diameter of a cooling water inlet hole is 30mm,
the number of the drain holes is 6, and the diameter of each drain hole is 5mm
Figure BDA0003722930540000081
In summary, the flow rate of the cooling water of the centrifugal disk with the diameter of 60mm is 0.4m/s, and the flow rate of the metal liquid is 5.36 multiplied by 10 -4 m 3 And/s, the thickness of the centrifugal disc is 8mm, the cooling water inlet hole is 30mm, the number of the drain holes is 6, the diameter of the drain hole is 5mm, a stable solid layer with the thickness of 1mm can be formed on the surface of the centrifugal disc, the centrifugal disc is effectively protected from ablation damage, and efficient spray forming can be guaranteed.
In the embodiment of the invention, the liquid metal enters the surface of the centrifugal disc through the flow guide pipe, and simultaneously cooling water enters the cavity of the centrifugal disc 6 through the connecting sleeve 7 to cool the centrifugal disc.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A centrifugal spray forming device capable of adjusting the axial size of an annular blank comprises an annular die and a centrifugal atomizer, and is characterized in that: the annular mold can do axial reciprocating motion under the driving of the driving device, the inner side of the upper part of the annular mold is further provided with an adjusting device for blocking and positioning the upper end face of the blank, the adjusting device comprises an annular baffle plate with the outer diameter consistent with the inner diameter of the annular mold, the annular baffle plate is fixed in the annular mold through an adjusting bolt, and the axial position of the annular baffle plate in the annular mold can be adjusted through the adjusting bolt, so that the axial size of the annular mold can be adjusted.
2. The apparatus of claim 1, wherein: wherein the adjusting bolt is fixed with the upper end of the annular die through the pressure plate.
3. The apparatus of claim 2, wherein: one end of the pressing plate is fixed on the upper end face of the annular mold, and the other end of the pressing plate is suspended in the inner hole of the annular mold and fixedly connected with the adjusting bolt.
4. The apparatus of claim 3, wherein: two positioning holes are distributed at intervals along the length direction of the pressure plate, one positioning hole is matched with a fixing bolt to fix the pressure plate on the outward turning edge of the annular die, the other positioning hole is penetrated by an adjusting bolt, and a nut screwed on the adjusting bolt is tightly pressed on the pressure plate.
5. A centrifugal spray forming device capable of adjusting the axial dimension of an annular blank member according to any one of claims 1 to 4, wherein: wherein the annular die can also perform rotary motion under the driving of the driving device.
6. The apparatus of claim 5, wherein: wherein the distance between the outer diameter and the inner diameter of the annular baffle is not less than the thickness of a workpiece to be prepared.
7. The apparatus of claim 1, wherein: the centrifugal atomizer comprises a centrifugal disc and a connecting sleeve, and a cavity is formed below the disc surface of the centrifugal disc for bearing the metal liquid; the connecting sleeve can transmit rotary power to the centrifugal disc and can enable the cavity of the centrifugal disc to be filled with flowing cooling water, and when the thickness of a solid layer formed by solidifying metal liquid on the disc surface reaches a set value, the cooling water in the cavity can establish steady-state heat conduction with the metal liquid above the solid layer.
8. The apparatus of claim 7, wherein: when the cooling water establishes steady-state heat conduction with the metal liquid, the following relationship exists between the centrifugal disk and the solid layer:
Figure FDA0003722930530000011
wherein k is Gold (Au) Is the thermal conductivity of the metal of the solid layer, k Dish Is the thermal conductivity of the centrifugal disk, H Gold (Au) Set thickness for solid layer metal, H Dish Is the thickness of the surface of the centrifugal disc T Fusion furnace Is the metal melting point temperature, T Fixing device Is the temperature between the solid layer and the surface of the centrifugal disc, T Water (W) The highest temperature of the cooling water.
9. The apparatus of claim 9, wherein: the flow rate of the cooling water is calculated by the following formula:
the flow rate of the cooling water is quantified according to a heat conduction formula,
Figure FDA0003722930530000021
where ρ is Water (W) Density of cooling water, c Water (I) Is the specific heat capacity of cooling water, Q Water (W) For the flow of cooling water, T 0 Is the initial temperature of the cooling water, S Dish The surface area of the centrifugal disc;
the area of the centrifugal disk is calculated,
Figure FDA0003722930530000022
wherein d is Dish The diameter of the centrifugal disc;
and substituting the formula (2) into the formula (1) to obtain the cooling water flow.
10. The water-cooled temperature-reducing centrifugal disk for centrifugal spray forming according to claim 9, wherein: the flow rate of the liquid metal can be obtained by the following formula:
0.5ρ gold (Au) c Gold (Au) Q Gold (Au) △T＝ρ Water (W) c Water (W) Q Water (W) (T Water (W) -T 0 )
Where ρ is Gold (Au) Is the density of the metal, c Gold (Au) Is the specific heat capacity of the metal, Q Gold (Au) The flow rate of the metal, and Δ T is the degree of superheat of the metal.
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FR1521156A (en) * 1967-04-28 1968-04-12 Deutsche Edelstahlwerke Ag Device for manufacturing centrifugal cast pipes of different lengths in a centrifugal casting shell of a predetermined diameter
US4515864A (en) * 1974-06-28 1985-05-07 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Solid metal articles from built up splat particles
JPS5891101A (en) * 1981-11-27 1983-05-31 Daido Steel Co Ltd Centrifugal spraying method
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CN1300871A (en) * 1999-12-17 2001-06-27 哈尔滨工业大学 Centrifugal cotomizing, spray and deposition method for coating and equipment
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KR20190026203A (en) * 2017-09-04 2019-03-13 김성규 a Centrifugal casting apparatus of changing the length of casting
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US20210308764A1 (en) * 2018-09-25 2021-10-07 Zhiyong QIN Apparatus and method for preparing spherical metal powder based on one-by-one atomization method for uniform droplets
CN109877299A (en) * 2019-04-16 2019-06-14 河南科技大学 One kind getting rid of casting device and gets rid of casting centrifugal pan
CN113059137A (en) * 2021-03-17 2021-07-02 雅佳(广州)电子科技有限公司 Adjustable metal centrifugal casting mould with quick heat dissipation cooling function

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