CN209156751U - Liquid nitrogen cooling device applied to aluminium alloy pipe - Google Patents
Liquid nitrogen cooling device applied to aluminium alloy pipe Download PDFInfo
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- CN209156751U CN209156751U CN201822049050.5U CN201822049050U CN209156751U CN 209156751 U CN209156751 U CN 209156751U CN 201822049050 U CN201822049050 U CN 201822049050U CN 209156751 U CN209156751 U CN 209156751U
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- liquid nitrogen
- cooling device
- nitrogen cooling
- aluminium alloy
- alloy pipe
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Abstract
The utility model provides a kind of liquid nitrogen cooling device applied to aluminium alloy pipe, and the liquid nitrogen cooling device is set to aluminium tube hot extrusion molding exit, and fits in the downside of aluminum pipe forming mold lower die；The liquid nitrogen cooling device offers liquid nitrogen channel, and the liquid nitrogen cooling device also offers the inlet duct and outlet conduit for being connected to the liquid nitrogen channel respectively.It can realize aluminium tube in hot extrusion process according to liquid nitrogen cooling device provided by the utility model, the aluminum pipe forming mold and aluminium tube of high temperature are carried out directly cooling, and liquid nitrogen evaporates form nitrogen at high temperature, and then avoid aluminium tube surface premature oxidation, also the surface quality of tubing can be significantly improved, die life is extended.
Description
Technical field
The utility model relates to a kind of cooling device more particularly to a kind of cooling dresses of liquid nitrogen applied to aluminium alloy pipe
It sets.
Background technique
Aluminium alloy pipe is most widely used one kind non-ferrous metal structural material in industry.The density of aluminium alloy pipe
It is low, but intensity is relatively high, be more than high-quality steel, plasticity is good, can be processed into various profiles, have excellent electric conductivity, thermal conductivity and
Corrosion stability is widely used in industry: as widely applied in Aeronautics and Astronautics, automobile, machine-building, ship and chemical industry.
In the rapid development of industrial economy, demand of the people to aluminum alloy piping welding structural member is increasing, enables aluminum alloy to the research of tubing
Also therewith deeply, the extensive use of aluminium alloy pipe promotes the development of aluminum alloy solder technology, while the development of welding technique
The application field of aluminium alloy pipe has been expanded again, therefore also higher and higher for the quality requirements of aluminium alloy pipe, simultaneously for
The technology for improving aluminium alloy pipe one of just has become a hot topic of research.
But in the prior art, when producing to aluminium alloy pipe hot extrusion, aluminium ingot is squeezed through mould in extrusion cylinder
After tool, the aluminium tube and mold temperature of extrusion can be increased, and since the high temperature aluminium tube and mold of extrusion are all exposed to sky
In gas, it may appear that following three defects: first is hard alumina particle to be generated on aluminium tube surface, and it is attached partially to stand
In mould outlet, scratch can be generated to subsequent aluminium tube surface, die surface, which will also result in, to be pulled；Second is due to continuing
Raised mold temperature will lead to die surface and move back nitrogen and reduce hardness, so as to shorten die life；Third be due to
The aluminium tube temperature of extrusion, which constantly increases, to be also led to the irregular deformation of tubing or even scraps.Enterprise domestic at present in order to avoid
Lead to waste product occur because of temperature height, is all made of lower extrusion speed, not only extruding efficiency is very low, and low velocity and low
Efficiency hinders further increasing for extruded aluminum yield and quality.
In this regard, needing one kind on the basis of existing technology, a kind of improvement project is provided, to solve the above problems.
Summary of the invention
The purpose of the utility model is to provide a kind of liquid nitrogen cooling devices applied to aluminium alloy pipe, to solve to close in aluminium
When golden tubing hot extrusion produces.
To achieve the goals above, the utility model provides a kind of liquid nitrogen cooling device applied to aluminium alloy pipe,
The liquid nitrogen cooling device is set to aluminium tube hot extrusion molding exit, and fits under aluminum pipe forming mold lower die
Side；The liquid nitrogen cooling device offers liquid nitrogen channel, and the liquid nitrogen cooling device also offers the connection liquid nitrogen respectively
The inlet duct and outlet conduit in channel.
Compared with prior art, the liquid nitrogen cooling device provided by the utility model applied to aluminium alloy pipe, setting
In aluminium tube hot extrusion molding exit, and fit in the downside of aluminum pipe forming mold lower die；The liquid nitrogen cooling device opens up
There is liquid nitrogen channel, and liquid nitrogen channel is bonded with the downside of aluminum pipe forming mold lower die.In aluminium alloy pipe hot extrusion production,
After aluminium ingot is squeezed through mold in extrusion cylinder, the aluminium tube and mold and the liquid nitrogen in liquid nitrogen channel for squeezing out high temperature are directly connect
Touching is, it can be achieved that aluminium tube and mold to high temperature are directly cooling, to solve following three defects that will appear in the prior art:
First is hard alumina particle to be generated on aluminium tube surface, and part station is attached to mould outlet, to subsequent aluminum pipe
Material surface can generate scratch, and die surface, which will also result in, to be pulled；Second is since persistently raised mold temperature will lead to mould
Tool surface moves back nitrogen and reduces hardness, so as to shorten die life；Third is since the aluminium tube temperature of extrusion constantly rises
Height also leads to the irregular deformation of tubing or even scraps.
Preferably, being offered in the liquid nitrogen cooling device towards the table wall of the aluminum pipe forming mold lower die side
It is connected to the groove of the inlet duct and the outlet conduit, the groove constitutes the liquid nitrogen channel.It according to this structure, can be with
So that the aluminium tube and mold of high temperature are directly contacted with the liquid nitrogen flowed in liquid nitrogen channel, thus realize to the aluminium tube of high temperature and
Mold carries out directly cooling.
Preferably, the liquid nitrogen channel is in using the center of the liquid nitrogen cooling device as the ring-type in the center of circle.
Preferably, several described outlet conduits are equably connected to the liquid nitrogen channel respectively.It according to this structure, can be with
So that cooling rear mold and each position temperature of the contact surface of the liquid nitrogen cooling device are uniform.
Preferably, in several described outlet conduits, close to the inlet duct the part outlet conduit it is transversal
Face area is less than the cross-sectional area of the part outlet conduit far from the inlet duct.More specifically, outlet conduit is opened
If there are six, and six outlet conduits are in be arranged across the direction in the liquid nitrogen channel center of circle；And close to two outlets of inlet duct
The width of pipeline is minimum, and the width of intermediate two outlet conduits takes second place, the width of two outlet conduits in lower end far from inlet duct
Degree is maximum.Liquid nitrogen temperature during flowing through liquid nitrogen channel can gradually rise, and the width of outlet slot is bigger, more be conducive to acceleration pair
The cooling of mold, so that cooling rear mold and each position temperature of the contact surface of the liquid nitrogen cooling device are uniform.
Preferably, several described outlet conduits are arranged to the direction in the liquid nitrogen channel center of circle respectively；The liquid nitrogen is cold
But device offers through hole along central axis, and the through hole is connected to several outlet conduits；According to this structure, liquid nitrogen
After the nitrogen generated that gasifies flows out to through hole along outlet conduit, because upside is hindered by aluminum pipe forming mold lower die, therefore turn to
Lower outflow through hole, after due to nitrogen quality be less than air, flow up package aluminum pipe forming mold and be located at aluminium tube
Aluminium tube in molding die, to deaden oxygen, aluminium tube is avoided to aoxidize.
Preferably, the side of the liquid nitrogen cooling device applied to aluminium alloy pipe is also provided with and is surrounded on the application
In the circular groove and vertical rectangular-shaped groove of the liquid nitrogen cooling device of aluminium alloy pipe.According to this structure, the liquid nitrogen can be fixed
Cooling device, so as to the surface of the liquid nitrogen cooling device can smoothly be contacted to the aluminium tube and mold of high temperature, to carry out
It is directly cooling.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model liquid nitrogen cooling device.
Fig. 2 is the structural schematic diagram at the utility model liquid nitrogen cooling device back side.
In figure: 1 liquid nitrogen channel, 2 inlet ducts, 3 outlet conduits, 4 through holes, 5 liquid nitrogen entrance holes, 6 circular grooves, 7 grooves.
Specific embodiment
For technology contents, the construction feature, the objects and the effects that the utility model is described in detail, below in conjunction with implementation
Mode simultaneously cooperates attached drawing to be explained in detail.
As shown in Figure 1, a kind of liquid nitrogen cooling device applied to aluminium alloy pipe provided by the utility model, liquid nitrogen are cold
But device is set to aluminium tube hot extrusion molding exit, and fits in the downside of aluminum pipe forming mold lower die；Its liquid nitrogen is cold
But device offers liquid nitrogen channel 1, and liquid nitrogen cooling device also offers inlet duct 2 and the outlet in connection liquid nitrogen channel respectively
Pipeline 3.As shown in connection with fig. 2, more specifically:
As shown in Figure 1, a kind of liquid nitrogen cooling device applied to aluminium alloy pipe provided by the utility model, liquid nitrogen are cold
But device is set to aluminium tube hot extrusion molding exit, and fits in the downside of aluminum pipe forming mold lower die, is tied by this
Structure contacts the aluminium tube of high temperature and molding die directly with liquid nitrogen cooling device, to carry out cooling effect.And it is somebody's turn to do
Liquid nitrogen cooling device offers liquid nitrogen channel 1, and liquid nitrogen cooling device also offers the inlet duct 2 in connection liquid nitrogen channel respectively
With outlet conduit 3；When liquid nitrogen from inlet duct 2 enter liquid nitrogen channel 1, the liquid nitrogen in liquid nitrogen channel 1 and the aluminium tube of high temperature and
Molding bottom die contact, to realize the cooling to aluminium tube and molding bottom die, while liquid nitrogen evaporates form nitrogen at high temperature,
Then it is discharged from outlet conduit 3, gas shield is formed to aluminium tube, prevents high-temperature oxydation.
As shown in Figure 1, the table wall of the liquid nitrogen cooling device offers the groove of connection inlet duct 2 and outlet conduit 3, tool
Body: in the present embodiment, liquid nitrogen cooling device is in more flat cylindrical structure, and liquid nitrogen cooling device be set to aluminium tube at
When the downside of type lower mould, the axle center of liquid nitrogen cooling device is in vertically arranged, liquid nitrogen cooling device upper side and aluminium tube
It fits on the downside of molding die lower die；The upper side of liquid nitrogen cooling device offers the groove for constituting liquid nitrogen channel 1, liquid nitrogen warp
It is flowed out after being entered in liquid nitrogen channel 1 by inlet duct 2 by outlet conduit 3, leads to the aluminium tube of high temperature and mold with liquid nitrogen
The liquid nitrogen flowed in road 1 directly contacts, and directly cool down to the aluminium tube and mold of high temperature to realize.
Preferably, several outlet conduits 3 are equably connected to liquid nitrogen channel 1 respectively.Specifically, in liquid nitrogen channel 1
Liquid nitrogen heats up after contacting with the aluminium tube of high temperature and mold, and the even whole liquid nitrogen of wherein most can gasify, gasification
Middle nitrogen rapid spatial expansion, pressure increase.It causes danger to avoid partial pressure from increasing rapidly, is used in the present embodiment
Technical solution be: liquid nitrogen channel 1 is provided with multiple outlet conduits 3, and to be equably connected to liquid nitrogen logical for multiple outlet conduits 3
Road 1, so that the nitrogen for generation of gasifying can be discharged quickly, in time when the liquid nitrogen in liquid nitrogen channel 1 gasifies.
Preferably, the cross-sectional area close to the section port pipeline 3 of inlet duct 2 is less than in several outlet conduits 3
The cross-sectional area of section port pipeline far from inlet duct 2.More specifically, there are six outlet conduit 3 opens up, and six go out
Mouth pipeline 3 is in be arranged across the direction in 1 center of circle of liquid nitrogen channel；And most close to the width of two outlet conduits 3 of inlet duct 2
Small, the width of intermediate two outlet conduits 3 takes second place, and the width of the outlet conduit 3 of lower end two far from inlet duct 2 is maximum.?
In the present embodiment, the difference that the width dimensions of outlet conduit 3 are arranged, be because liquid nitrogen during flowing through liquid nitrogen channel 1 by
Gradually heat absorption generates gasification, and the more gasifications of part liquid nitrogen heat absorption far from inlet duct 2 are also more, so that with apart from inlet duct 2
It is remoter, temperature can be gradually risen, the width of outlet conduit 3 is arranged bigger, so that nitrogen is discharged in time.
Preferably, as depicted in figs. 1 and 2, in the present embodiment, liquid nitrogen cooling device offers through hole along central axis
4, one end of several outlet conduits 3 is connected to liquid nitrogen channel 1, and the other end of several outlet conduits 3 is connected to through hole 4.
According to this structure, after the nitrogen that liquid nitrogen gasification generates flows out to through hole 4 along outlet conduit 3, because upside is by aluminium tube shaping mould
Tool lower die hindered, therefore turn flow downward out through hole 4, after due to nitrogen quality be less than air, flow up wrap up aluminium tube at
Pattern tool and the aluminium tube in aluminum pipe forming mold, to deaden oxygen, aluminium tube is avoided to aoxidize.
As depicted in figs. 1 and 2, the side applied to the liquid nitrogen cooling device of aluminium alloy pipe be also provided be surrounded on it is described
The circular groove 6 of liquid nitrogen cooling device applied to aluminium alloy pipe and vertical rectangular-shaped groove 7.According to this structure, it can fix
The liquid nitrogen cooling device, so as to the surface of the liquid nitrogen cooling device can be smoothly contacted to the aluminium tube and mold of high temperature, from
And it carries out directly cooling.
Below according to shown in Fig. 1 and Fig. 2, the work of the liquid nitrogen cooling device of aluminium alloy pipe is applied to the utility model
Process is described in detail: during carrying out hot-extrusion aluminum tube material, after aluminium ingot is squeezed through mold in extrusion cylinder, and high temperature
Aluminium tube in molding die, and the downside of molding die lower die is bonded the surface of the liquid nitrogen cooling device, while external dress
It sets and liquid nitrogen is injected into inlet duct 2 from the liquid nitrogen entrance hole 5 of the liquid nitrogen cooling device side, liquid nitrogen is flowed from inlet duct 2 again
Into annular liquid nitrogen channel 1, because liquid nitrogen channel 1 is provided with the surface of the liquid nitrogen cooling device, thus the aluminium tube of high temperature and at
Type lower mould is directly contacted with the liquid nitrogen in liquid nitrogen channel 1, to realize the cooling to the aluminium tube and molding die of high temperature, simultaneously
Liquid nitrogen evaporates at high temperature forms nitrogen, is then uniformly distributed from six and the outlet conduit 3 for being connected to liquid nitrogen channel 1 flows out to
After through hole 4, because upside is hindered by aluminum pipe forming mold lower die, therefore turn flow downward out through hole 4, after due to nitrogen quality
Less than air, package aluminum pipe forming mold and the aluminium tube in aluminum pipe forming mold are flowed up, to deaden oxygen
Gas avoids aluminium tube from aoxidizing, to complete to the aluminium tube of high temperature and the direct cooling procedure of molding die.
Compared with prior art, the liquid nitrogen cooling device provided by the utility model applied to aluminium alloy pipe, setting
In aluminium tube hot extrusion molding exit, and the downside of aluminum pipe forming mold lower die is fitted in, and the liquid nitrogen cooling device is opened
Equipped with liquid nitrogen channel 1, and liquid nitrogen channel 1 is bonded with the downside of aluminum pipe forming mold lower die；It is raw in aluminium alloy pipe hot extrusion
When production, after aluminium ingot is squeezed through mold in extrusion cylinder, squeeze out high temperature aluminium tube and mold and the liquid nitrogen in liquid nitrogen channel 1 it is straight
Contact is, it can be achieved that aluminium tube and mold to high temperature are directly cooling, to solve following three will appear in the prior art
Defect: first is hard alumina particle to be generated on aluminium tube surface, and part station is attached to mould outlet, to subsequent
Aluminium tube surface can generate scratch, and die surface, which will also result in, to be pulled；Second is since persistently raised mold temperature will be led
Die surface is caused to move back nitrogen and reduce hardness, so as to shorten die life；Third be due to extrusion aluminium tube temperature not
Disconnected raising also leads to the irregular deformation of tubing or even scraps.Further, which offers cricoid liquid nitrogen
Channel 1 can make the aluminium tube of high temperature and molding die uniformly contact when being bonded with liquid nitrogen channel 1, preferably to realize liquid
Nitrogen is directly cooled down under high temperature action, while evaporating the nitrogen of formation to prevent tubing high-temperature oxydation；Further, should
Liquid nitrogen cooling device is also provided with six deep equalities but the outlet conduit 3 of width not etc., preferably can flow through liquid in liquid nitrogen
Temperature can gradually rise during nitrogen channel 1, and the width of outlet conduit 3 is bigger, more be conducive to accelerate to mold and aluminium tube
It is cooling, so that each position temperature of the contact surface of cooling rear mold and aluminium tube is uniform.
It above disclosure is merely preferred embodiments of the utility model, certainly cannot be practical new to limit this with this
The interest field of type, therefore equivalent variations made according to the patent scope of the utility model still belong to the utility model and are covered
Range.
Claims (9)
1. a kind of liquid nitrogen cooling device applied to aluminium alloy pipe, it is characterised in that: the liquid nitrogen cooling device is set to aluminium
Tubing hot extrusion molding exit, and fit in the downside of aluminum pipe forming mold lower die；The liquid nitrogen cooling device offers
Liquid nitrogen channel, and the liquid nitrogen cooling device also offers the inlet duct and outlet conduit for being connected to the liquid nitrogen channel respectively.
2. being applied to the liquid nitrogen cooling device of aluminium alloy pipe as described in claim 1, it is characterised in that: Yu Suoshu liquid nitrogen is cold
But device offers towards the table wall of the aluminum pipe forming mold lower die side and is connected to the inlet duct and the outlet
The groove in road, the groove constitute the liquid nitrogen channel.
3. being applied to the liquid nitrogen cooling device of aluminium alloy pipe as claimed in claim 2, it is characterised in that: the liquid nitrogen channel
In using the center of the liquid nitrogen cooling device as the ring-type in the center of circle.
4. being applied to the liquid nitrogen cooling device of aluminium alloy pipe as described in claim 1, it is characterised in that: several are described out
Mouth pipeline is equably connected to the liquid nitrogen channel respectively.
5. being applied to the liquid nitrogen cooling device of aluminium alloy pipe as claimed in claim 4, it is characterised in that: several are described out
In mouth pipeline, the cross-sectional area close to the part outlet conduit of the inlet duct is less than far from the inlet duct
The cross-sectional area of the part outlet conduit.
6. being applied to the liquid nitrogen cooling device of aluminium alloy pipe as claimed in claim 3, it is characterised in that: several are described out
Mouth pipeline is in be arranged across the direction in the liquid nitrogen channel center of circle.
7. being applied to the liquid nitrogen cooling device of aluminium alloy pipe as claimed in claim 3, it is characterised in that: several described outlets
Pipeline is arranged to the direction in the liquid nitrogen channel center of circle respectively；The liquid nitrogen cooling device offers through hole along central axis,
The through hole is connected to several outlet conduits.
8. being applied to the liquid nitrogen cooling device of aluminium alloy pipe as claimed in claim 4, it is characterised in that: the liquid nitrogen outlet
There are six road opens up.
9. being applied to the liquid nitrogen cooling device of aluminium alloy pipe as described in claim 1, it is characterised in that: the aluminium that is applied to closes
The side of the liquid nitrogen cooling device of golden tubing, which is also provided with, is surrounded on the liquid nitrogen cooling device applied to aluminium alloy pipe
Circular groove and vertical rectangular-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822049050.5U CN209156751U (en) | 2018-12-07 | 2018-12-07 | Liquid nitrogen cooling device applied to aluminium alloy pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822049050.5U CN209156751U (en) | 2018-12-07 | 2018-12-07 | Liquid nitrogen cooling device applied to aluminium alloy pipe |
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| Publication Number | Publication Date |
|---|---|
| CN209156751U true CN209156751U (en) | 2019-07-26 |
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ID=67342620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822049050.5U Active CN209156751U (en) | 2018-12-07 | 2018-12-07 | Liquid nitrogen cooling device applied to aluminium alloy pipe |
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| Country | Link |
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| CN (1) | CN209156751U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112934995A (en) * | 2021-02-01 | 2021-06-11 | 中国航空制造技术研究院 | Preparation method and system of alloy capillary tube |
| CN114011895A (en) * | 2021-09-08 | 2022-02-08 | 荀正 | Aluminum profile hot extrusion die convenient to form |
-
2018
- 2018-12-07 CN CN201822049050.5U patent/CN209156751U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112934995A (en) * | 2021-02-01 | 2021-06-11 | 中国航空制造技术研究院 | Preparation method and system of alloy capillary tube |
| CN114011895A (en) * | 2021-09-08 | 2022-02-08 | 荀正 | Aluminum profile hot extrusion die convenient to form |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 369, Gaoming Avenue Middle, Yanghe Town, Gaoming District, Foshan City, Guangdong Province, 528300 Patentee after: Guangdong Shenmei Special Aluminum Alloy Co.,Ltd. Address before: No. 369, Gaoming Avenue Middle, Yanghe Town, Gaoming District, Foshan City, Guangdong Province, 528500 Patentee before: Foshan Shendamei Special Aluminum Alloy Co.,Ltd. |
|
| CP03 | Change of name, title or address |