CN1502434A - Restricted scanning gas atomizing system - Google Patents
Restricted scanning gas atomizing system Download PDFInfo
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- CN1502434A CN1502434A CNA021448965A CN02144896A CN1502434A CN 1502434 A CN1502434 A CN 1502434A CN A021448965 A CNA021448965 A CN A021448965A CN 02144896 A CN02144896 A CN 02144896A CN 1502434 A CN1502434 A CN 1502434A
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Abstract
The present invention relates to a restrictive scanning gas-atomizing system. It is formed from gas-atomizing nozzle, guide mechanism and scanning-swinging mechanism. Said guide mechanism is positioned in the centre of gas-atomizing nozzle, said gas-atomizing nozzle is connected with scanning-swinging mechanism by means of connecting component, and the axis of the described guide mechanism is coincided with the axis of said gas-atomizing nozzle. Said invention can improve atomizing effect, and can raise the quality of spray-formed blank, and can be used for spray-forming wide-width plate blank, pipe blank and rod blank.
Description
Technical field
The invention belongs to the gas atomization technical field, specifically a kind of restricted scanning gas atomization system that is used for the metal jet former.
Background technology
In the metal jet forming process, gases at high pressure atomize to continuous metal liquid stream by atomizer, make it to be broken into fine droplet.Drop and then cooling deposition form metal base.This process is typical rapid solidification.The design of atomizer is extremely important, and good atomizer should have higher gas atomization efficient, and guarantees that atomized drop has higher cooling velocity.In addition, in order to prepare bigger slab, pipe and cylindrical blank, often require nozzle can in atomization process, scan swing.
At present, different according to the fit system of metal liquid mozzle and atomizer, the gas atomizing nozzle that will be used for reaction-injection moulding is divided into two classes: restricted and non-limiting atomizer.The structure of non-limiting atomizer and atomization process as shown in Figure 1, in atomization process metal bath behind mozzle 12, unrestriced inflow range of atomization; In the range of atomization, liquid stream is formed atomizer (atomizing) cone 13 by gases at high pressure by non-limiting atomizer 11 atomizings.In concrete the application, non-limiting atomizer 11 can be united use (as shown in Figure 2) with the scanning swing mechanism, realizes the scanning atomizing; Wherein: 22A is a turning cylinder in the scanning swing mechanism, and 22B is a cam, and 22C is for connecting the transmission fork.This kind method is because atomizer scanning angle and hunting frequency are easy to accurate control, thereby has been widely used in reaction-injection moulding metal billet and than the slab of wide cut.Its shortcoming is that high velocity gas stream kinetic energy rejection before the broken metal liquid stream of atomizing is bigger, thereby nebulization efficiency is lower, and gas can not be fully utilized, and causes waste; In addition, molten drop is prone to backwash in the jet atomization process, when solidifying accumulation below the molten drop of continuous backwash adheres to atomizer, can cause the obstruction of gas atomizing nozzle centre bore, this not only easy defective nozzle, and influence the continuity of reaction-injection moulding process and the quality of product.
The structure of restricted gas atomizing nozzle and atomization process are as shown in Figure 3.Metal liquid stream is promptly formed atomizer (atomizing) cone 13 by gases at high pressure by restricted atomizer 31 atomizings in the exit of mozzle 12 in atomization process.The advantage of such restricted atomizer 31 is nebulization efficiency height of gas, saves gas, and the atomizing effect of alloy melt is good, and the atomized drop average-size is less.But such nozzle can not scan swing in atomization process, so can not scan atomizing, therefore, the deposition region is less, is not suitable for preparing the metal slabs than wide cut, the pipe and the larger-diameter metal column base of larger caliber.
Summary of the invention
In order to overcome above-mentioned deficiency, the purpose of this invention is to provide a kind of restricted scanning atomizer system, it can be good at the atomizing effect that keeps the nebulization efficiency height of restrictive nozzle, save gas, alloy melt, the atomized drop average-size scans atomizing in less, is suitable for the pipe of metal slabs, larger caliber than wide cut and than the preparation of major diameter metal cylindrical blank.
The technical scheme of the restricted scanning gas atomization of the present invention system is: be made up of restricted atomizer, deflector and scanning swing mechanism, deflector is positioned in the middle of the restricted atomizer, restricted atomizer links to each other with the scanning swing mechanism by connector, realizes the oscillatory scanning of restricted atomizer in atomization process; Described deflector axis overlaps with restricted atomizer axis;
Described deflector is by last mozzle, the middle segment that connects, following mozzle three parts constitute, and last mozzle is connected with the fusion crucible bottom, and the lower end has external screw thread, being connected segment with the centre is threaded, following mozzle is a cup-like structure, and top has hemispherical groove, and its inner surface can be connected segment with the centre and be slidingly matched and be connected, outer wall is assemblied on the annular inner wall of restricted atomizer, and its underpart cup neck portion extend out to restricted atomizer below; Last mozzle, middle connection segment reach down, and the material of mozzle is heat proof materials such as high-strength graphite, boron nitride.
The advantage of the restricted scanning gas atomization system that the present invention is designed is:
1. deflector of the present invention combines with gas atomizing nozzle, scanning swing mechanism, solved the problem that traditional restricted atomizer can not scan, make the effect of atomization gas and metal liquid can be more abundant, mainly be applicable to metal atomization spray deposition processing equipment, can be used for reaction-injection moulding than the pipe of wide cut metal slabs, larger caliber and than the cylinder with large diameter base.
2. compare with existing non-limiting scanning gas atomizing nozzle, when adopting restricted scanning gas atomization of the present invention system, the nebulization efficiency height of gas, the atomizing effect of alloy melt is good, the average-size of atomized drop is less, helps improving the quality of reaction-injection moulding workpiece, saves the atomization gas consumption, and can avoid the backwash phenomenon of existing non-limiting scanning gas atomizing nozzle frequent atomized drop that occurs in course of injection, help guaranteeing carrying out smoothly of reaction-injection moulding.
3. adopt gas atomizing nozzle of the present invention, sweep amplitude and frequency can be regulated arbitrarily as required, and adaptability is strong (can be used for reaction-injection moulding broad former base, pipe, excellent base); Rational in infrastructure, it is all convenient to make with installation.
Description of drawings
Fig. 1 is non-limiting atomizing nozzle structure and an atomization process schematic diagram in the prior art.
Fig. 2 unites the atomization process schematic diagram of use for non-limiting scanning atomizer in the prior art and swinging structure.
Fig. 3 is the atomization process figure of restricted gas atomizing nozzle in the prior art.
Fig. 4 is the structure and the atomization process schematic diagram of the restricted scanning gas atomization of the present invention system.
The specific embodiment
Below with reference to the accompanying drawings in conjunction with specific embodiments limitation of the present invention scanning gas atomization system be further described.
Embodiment 1
As shown in Figure 4, the restricted scanning gas atomization of the present invention system, form by restricted atomizer 31, deflector 41 and scanning swing mechanism 21, deflector 41 is positioned in the middle of the restricted atomizer 31, restricted atomizer 31 is non-limiting atomizing nozzle structure, link to each other with scanning swing mechanism 21 by connector, realize the oscillatory scanning of restricted atomizer 31 in atomization process; Described deflector 41 axis overlap with restricted atomizer 31 axis.
Restricted atomizer 31 lower ends have 36 passage 31A (present embodiment passage 31A is the annular distance structure) to be evenly distributed on its lower end circumference, and the lateral wall of restricted atomizer 31 has atomization gas to introduce hole 31B; Described introducing hole 31B joins by gas conduit and atomization gas pipeline, introduces atomization gas; Restricted atomizer 31 is assemblied on the scanning swing mechanism 21.
The principle of the invention is:
Restricted atomizer 31 can be swung by scanning swing mechanism 21, and the metal liquid that following mozzle 41C flows out promptly is atomized gas breaking in the exit, produces restricted atomizing mechanism.
In atomization process, the atomization gas of being introduced by the atomization gas pipeline sprays from looping pit, forms atomization gas flow cone 13; The material of mozzle 41C all adopted high-strength graphite under the described mozzle 41A of going up of present embodiment, middle connection segment 41B reached, and last mozzle 41A lower end has external screw thread, is connected segment 41B to be threaded with the centre; In the reaction-injection moulding process, last mozzle 41A upper end communicates with at the bottom of the crucible, the bottom is connected segment 41B by being threaded with middle, following mozzle 41C is a cup-like structure, top is the spill sphere, being connected with the centre between segment 41B is contact, slidably connection, forms complete flow guide system, and the outside is connected with restricted atomizer 31; When restricted atomizer 31 scannings are swung, slide in the concave spherical surface of land portions on following mozzle 41 C of middle connection segment 41B and rotate, keep the water conservancy diversion path unimpeded; In the scanning atomization process, the crucible held stationary.
The present invention is an example with the reaction-injection moulding of 7075 aluminum alloy slabs, and the pendulum angle of setting restricted atomizer 31 is ± 15 °, and scan frequency is 2Hz, and atomizing pressure is 1.2MPa, and the average diameter of the atomization particle that is produced is 70 μ m; When the deposition distance was 380mm, having obtained fabric width was the alloy slab of 400mm.The smooth surface of alloy slab, each regional density is even, and density is higher, and the alloy slab only needs planing to remove very thin top layer follow-up before rolling, and the recovery rate of raw material is about 78%.
Learn by embodiment, adopt the restricted scanning gas atomization of the present invention system, can realize restricted scanning atomizing mechanism, gas atomization efficient height during metal jet is shaped, the alloy melt atomizing effect is good, the quality height of reaction-injection moulding blank, raw metal recovery rate height, and can prepare the pipe of metal slabs than wide cut, larger caliber and than the major diameter metal cylindrical blank etc.
Claims (3)
1. restricted scanning gas atomization system, it is characterized in that: form by restricted atomizer (31), deflector (41) and scanning swing mechanism (21), deflector is positioned in the middle of the restricted atomizer (31), restricted atomizer (31) links to each other with scanning swing mechanism (21) by connector, and described deflector (41) axis overlaps with restricted atomizer (31) axis.
2. the restricted scanning gas atomization system of describing according to claim 1 is characterized in that: described deflector (41) is by last mozzle (41A), the middle segment (41B) that connects, and following mozzle (41C) three parts constitute.Last mozzle (41A) is connected with the fusion crucible bottom, the lower end has external screw thread, be connected segment (41C) is threaded with the centre, following mozzle (41C) is a cup-like structure, top has hemispherical groove, its inner surface can be connected segment (41B) with the centre and be slidingly matched and be connected, and outer wall is assemblied on the annular inner wall of restricted atomizer (31), and its underpart cup neck portion extend out to restricted atomizer (31) below.
3. the restricted scanning gas atomization system of describing according to claim 1 is characterized in that: go up mozzle (41A), middle connect segment (41B) and down the material of mozzle (41) C be high-strength graphite, boron nitride heat proof material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02144896 CN1218803C (en) | 2002-11-22 | 2002-11-22 | Restricted scanning gas atomizing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02144896 CN1218803C (en) | 2002-11-22 | 2002-11-22 | Restricted scanning gas atomizing system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1502434A true CN1502434A (en) | 2004-06-09 |
| CN1218803C CN1218803C (en) | 2005-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02144896 Expired - Fee Related CN1218803C (en) | 2002-11-22 | 2002-11-22 | Restricted scanning gas atomizing system |
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| CN (1) | CN1218803C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102126024A (en) * | 2011-03-18 | 2011-07-20 | 哈尔滨工业大学 | Atomizer for spray forming of high-melting-point alloy deposit billets |
| CN109822098A (en) * | 2019-04-18 | 2019-05-31 | 江苏华威机械制造有限公司 | A kind of swinging type atomizing device and swing type spray deposition blank-making method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100479951C (en) * | 2007-03-26 | 2009-04-22 | 哈尔滨工业大学 | Mechanical swinging type atomizing liquid-leading system suitable for preparing large-size jet-diposition blank ingot |
-
2002
- 2002-11-22 CN CN 02144896 patent/CN1218803C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102126024A (en) * | 2011-03-18 | 2011-07-20 | 哈尔滨工业大学 | Atomizer for spray forming of high-melting-point alloy deposit billets |
| CN109822098A (en) * | 2019-04-18 | 2019-05-31 | 江苏华威机械制造有限公司 | A kind of swinging type atomizing device and swing type spray deposition blank-making method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1218803C (en) | 2005-09-14 |
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