CN106825099A - Mould liquid nitrogen cools down constant temperature pressurizing unit - Google Patents
Mould liquid nitrogen cools down constant temperature pressurizing unit Download PDFInfo
- Publication number
- CN106825099A CN106825099A CN201710254563.7A CN201710254563A CN106825099A CN 106825099 A CN106825099 A CN 106825099A CN 201710254563 A CN201710254563 A CN 201710254563A CN 106825099 A CN106825099 A CN 106825099A
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- Prior art keywords
- liquid nitrogen
- mould
- low
- temperature
- pressurizing unit
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work
- B21C29/04—Cooling or heating of press heads, dies or mandrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C29/00—Cooling or heating work or parts of the extrusion press; Gas treatment of work
- B21C29/003—Cooling or heating of work
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention discloses a kind of mould liquid nitrogen cooling constant temperature pressurizing unit, including mold system and the liquid nitrogen conveyer that is connected with mold system and is cooled down to mold system；The pressurizing unit had both reduced extrusion die temperature by controlling liquid nitrogen flow, and constant temperature extruding is realized again.By mould, heat becomes gas and is exported from mold pad to flow out liquid nitrogen, and the inert nitrogen of formation carried out effective protection to high temperature section bar, it is entirely avoided surface oxidation, improves surface quality, and extrusion speed is compared to can improve 17~27% in the past；Die life is also improved.
Description
Technical field
The invention belongs to field of extrusion of aluminium alloy profile, and in particular to a kind of mould liquid nitrogen cools down constant temperature pressurizing unit.
Background technology
In aluminium alloy extrusions extrusion process, aluminium alloy billet will be previously heated to 450 DEG C or so of admittedly molten state, extruding
Mould will also be previously heated to proper temperature, and the control of these temperature is very big on product quality and production efficiency influence.But squeezing
In pressure production process, billet out and forms product forms under extruding force effect from mould mouth, due to deforming and friction is former
Because very big heat can be produced, system temperature is set to be improved constantly on the basis of original, the faster intensification of extrusion speed is also fast, thus brings
Problem：The high temperature aluminium alloys section bar squeezed out from mould mouthful easily occurs oxidation with air contact makes product tissue hydraulic performance decline.
Mould strength and abrasion resistance decline, and service life reduction, production efficiency is restricted.During this is aluminium alloy extruded production process
The technical barrier of generally existing.Particularly current aluminium alloy extrusions quality requirement is improved constantly, and solves this problem particularly important.
The content of the invention
In view of this, it is an object of the invention to provide a kind of mould liquid nitrogen cooling constant temperature pressurizing unit, effectively to control
Extruder moulds of industrial equipment system intensification problem in the course of the work, so that improve product quality, improve production efficiency, reduce mould
Tool loss.
To reach above-mentioned purpose, the present invention provides following technical scheme：A kind of mould liquid nitrogen cools down constant temperature pressurizing unit, bag
The liquid nitrogen conveyer for including mold system and being connected with mold system and cooled down to mold system, the liquid nitrogen is defeated
Sending device includes being filled and drain valve, control piper, low-temperature pressure table II and conveying jet pipe from supercharging liquid nitrogen storage tank, liquid nitrogen container；
Main liquid nitrogen magnetic valve, low-temperature safety valve, the low-temperature pressure by being connected in turn on cryogenic vacuum rigid tubing of the control piper
Table I, low temperature check-valves, low temperature pressure regulator and low temperature manual modulation valve are constituted, and the low-temperature pressure table II is arranged on control piper
The low temperature manual modulation valve port of export, the low-temperature pressure table II by the soft connecting leg of cryogenic vacuum with convey jet pipe be connected, it is described
The other end of control piper is filled with liquid nitrogen container by the soft connecting leg of cryogenic vacuum and is connected with drain valve；The control piper at least two
Bar, is arranged in parallel the arrival end in low-temperature pressure table II.
Further, it is described to be provided with liquid level gauge from supercharging liquid nitrogen storage tank.
Further, the mold system is mainly by mould set, the die ontology being arranged in mould set and closure in mould
Set is constituted with the mold pad of die ontology end；The mould set side is provided with the through hole for inserting conveying jet pipe, inner side
The annular delivery chute that a circle is connected with through hole is provided with wall, madial wall is circumferentially additionally provided with some and is indulged along mould is axially extending
To delivery chute, the longitudinally fed groove is communicated with annular delivery chute；The mold pad is provided with and leading that longitudinally fed groove is communicated
Approaching channel.
Further, the through hole is the bellmouth corresponding with conveying nozzle-end near the termination of die side.
Further, the mold system port of export is provided with infrared temperature detector.
Further, the cryogenic vacuum rigid tubing uses 0Cr18Ni9 stainless steel systems with the soft connecting leg of cryogenic vacuum
Into.
The beneficial effects of the present invention are：Using liquid nitrogen cooling technology, extrusion die is both reduced by controlling liquid nitrogen flow
Tool temperature, realizes constant temperature extruding again.Liquid nitrogen by mould, heat become gas and from mold pad export flow out, formation it is lazy
Property nitrogen has carried out effective protection to high temperature section bar, it is entirely avoided surface oxidation, improves surface quality, and extrusion speed is compared
In 17~27% can be improved in the past；Die life is also improved.The current device is at 2000 tons to more than 22500 tons
Plant and used on type, obtain obvious technique effect and economic benefit.The liver mass stabilization of aluminium section bar, does not have harmful effect, real
The bright technique device of checking is reliable effective, and economical and practical, the technology for solving generally existing in aluminium alloy extruded production is difficult
Topic, hence it is evident that promote the raising of Business Economic Benefit.
Brief description of the drawings
In order that the purpose of the present invention, technical scheme and beneficial effect are clearer, the present invention provides drawings described below and carries out
Explanation：
Fig. 1 is system schematic of the invention；
Fig. 2 is the A-A sectional views of Fig. 1.
Specific embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
As illustrated, the mould liquid nitrogen cooling constant temperature pressurizing unit in the present invention, including mold system and and mold system
The liquid nitrogen conveyer for being connected and being cooled down to mold system, the liquid nitrogen conveyer is included from supercharging liquid nitrogen storage
Tank 1, liquid nitrogen container fills and drain valve 2, control piper, low-temperature pressure table II 3 and conveying jet pipe 4；The control piper it is main by
It is connected to liquid nitrogen magnetic valve 6, low-temperature safety valve 7, low-temperature pressure table I 8, low temperature check-valves on cryogenic vacuum rigid tubing 5 in turn
9th, low temperature pressure regulator 10 and low temperature manual modulation valve 11 are constituted, and the low-temperature pressure table II 3 is arranged on the low temperature hand of control piper
The dynamic port of export of regulating valve 11, the low-temperature pressure table II 3 is connected by the soft connecting leg 12 of cryogenic vacuum with conveying jet pipe 4, the control
The other end on tubulation road is filled with liquid nitrogen container by the soft connecting leg 12 of cryogenic vacuum and is connected with drain valve 2；The control piper is at least
Two, it is arranged in parallel the arrival end in low-temperature pressure table II 3.
It is liquid from supercharging liquid nitrogen storage tank 1 specifically, being provided with liquid level gauge 13 from supercharging liquid nitrogen storage tank 1 in the present embodiment
Nitrogen provides pressure in being passed into mould set, and liquid level gauge 13 then can intuitively show the surplus from liquid nitrogen in supercharging liquid nitrogen storage tank.Control
Liquid nitrogen magnetic valve 6 on pipeline is acted by switching control electromagnet cut off valve, and extruder contact to meet extruder between stop, more
The need for mold exchange；Low-temperature safety valve 7 have start freely, release pressure stabilization effect；The then real-time monitoring of low-temperature pressure table 8
Liquid nitrogen pressure.Volume will be enlarged by more than 500 times after changing into gas due to liquid nitrogen, and the reverse bulbs of pressure of formation can cause system
Cisco unity malfunction, here by setting low temperature check-valves 9 to prevent back flow of gas.Liquid nitrogen conveyance conduit is circle, low temperature hand
Dynamic regulating valve 11 cannot accurately adjust liquid nitrogen flow；And when liquid nitrogen content is very few, can not also stablize from supercharging liquid nitrogen storage tank 1
Liquid nitrogen is provided, low temperature pressure regulator 10 is installed additional, the flow and pressure of regulation liquid nitrogen can be coordinated with low temperature manual modulation valve 11, so as to carry
Height regulation and control precision.
Conveyance conduit in the present embodiment is divided to cryogenic vacuum rigid tubing 5 (hard tube) and the soft connecting leg 12 (flexible pipe) two of cryogenic vacuum
Kind, it is made by the stainless steel of 0Cr18Ni9, and use vacuum thermal insulation technology；Flexible pipe is used for from supercharging liquid nitrogen storage tank
1 constitutes with control piper, control piper and the connection for conveying jet pipe 4, hard tube by the connection of all regulation and control valve members and with support stand
A set of control device.Each valve member uses 0Cr18Ni9 stainless steels.
Control piper in the present embodiment is divided into two branch roads in parallel, and generally alternately switching is used, to use sky
Changed from supercharging liquid nitrogen storage tank 1, so as to ensure that liquid nitrogen supply is continuous；In particular cases can also two branch roads simultaneously use, i.e.,
Different device latus rectums can be selected according to extruder different size specification, be come in and gone out by low temperature pressure regulator 10 and control piper
The low-temperature pressure table II 3 of mouth, low-temperature pressure table I 8 grasp adjustment liquid nitrogen supply pressure, realize the auxiliary adjustment of intensity of cooling.
Workflow is：In extrusion process, by from a series of above-mentioned devices such as supercharging liquid nitrogen storage tanks, liquid nitrogen being sent into
In mould set in mold system, the stream of liquid nitrogen is controlled with low temperature pressure regulator 10 by artificial control low temperature manual modulation valve 11
Amount and pressure, by the temperature control of mould in a suitable scope.When liquid nitrogen will have been used in a liquid nitrogen storage tank
When, this circuit is closed by the liquid nitrogen magnetic valve 6 in control piper, another circuit is opened, use the liquid nitrogen storage tank purchased in addition
Feed liquid nitrogen.
Mold system in the present embodiment is main by mould set 14, the die ontology 15 being arranged in mould set 14 and closure
Constituted with the mold pad 16 of the end of die ontology 15 in mould set 14；The mould covers 14 sides and is provided with for inserting conveying spray
The through hole 17 of pipe 4, is provided with the annular delivery chute 18 that a circle is connected with through hole on madial wall, madial wall is circumferentially additionally provided with some
Along the axially extending longitudinally fed groove 19 of mould, the longitudinally fed groove 19 is communicated with annular delivery chute 18；The mold pad 16
It is provided with the guide channel 20 communicated with longitudinally fed groove 19.
Specifically, mould set side is provided with through hole 17, its close die ontology side is taper, the end with conveying jet pipe 4
Portion's taper dimensions are corresponding.Liquid nitrogen is transported to the annular delivery chute 18 on mould set 14 by conveying jet pipe 4, then is conveyed by annular
Groove 18 is flowed into longitudinally fed groove 19, is most flowed out from opening through the guide channel 20 on mold pad 16 afterwards, forms gaseous gas nitrogen
Protective layer, with starvation, prevents the section bar for just squeezing out from secondary oxidation occurring.
The liquid nitrogen cooling system is applicable on the extrusion die of various differential profiles, in replacing mold process, by hydraulic pressure
Cylinder control push rod by mould set releases extruder to the left, fixed after more mold exchange mould mould set again to the right push squeeze
In press, conveying jet pipe 4 is just inserted in the through hole 17 of mould set 14, and the spring 21 at conveying jet pipe 4 rear can make conveying jet pipe 4
Hold out against mould set 14, it is to avoid liquid nitrogen is revealed.
Used as the further improvement of such scheme, the mold system port of export is provided with infrared temperature detector 22.Change infrared
Line temperature monitor can at any time monitor the temperature of section bar extrusion, this temperature be with mold system temperature respective change, according to
The conveying capacity and pressure of the situation of change regulation liquid nitrogen of this temperature, control mold system temperature is in a less scope
(± 7 DEG C) changes, so as to realize constant temperature extruding production.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
Cross above preferred embodiment to be described in detail the present invention, it is to be understood by those skilled in the art that can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (6)
1. a kind of mould liquid nitrogen cooling constant temperature pressurizing unit, including mold system and it is connected with mold system and to mold system
The liquid nitrogen conveyer for cooling down, it is characterised in that：The liquid nitrogen conveyer is included from supercharging liquid nitrogen storage tank, liquid nitrogen
Tank fills and drain valve, control piper, low-temperature pressure table II and conveying jet pipe；The control piper is main low by being connected in turn
Liquid nitrogen magnetic valve, low-temperature safety valve, low-temperature pressure table I, low temperature check-valves, low temperature pressure regulator and low temperature on warm vacuum rigid tubing
Manual modulation valve is constituted, and the low-temperature pressure table II is arranged on the low temperature manual modulation valve port of export of control piper, the low temperature
Pressure gauge II is connected by the soft connecting leg of cryogenic vacuum with conveying jet pipe, and the other end of the control piper passes through the soft company of cryogenic vacuum
Pipe fills with liquid nitrogen container and is connected with drain valve；The control piper at least two, is arranged in parallel the entrance in low-temperature pressure table II
End.
2. mould liquid nitrogen according to claim 1 cools down constant temperature pressurizing unit, it is characterised in that：It is described to be stored up from supercharging liquid nitrogen
Tank is provided with liquid level gauge.
3. mould liquid nitrogen according to claim 1 cools down constant temperature pressurizing unit, it is characterised in that：The mold system is main
It is made up of with the mold pad of die ontology end in mould set mould set, the die ontology being arranged in mould set and closure；
Mould set side is provided with the through hole for inserting conveying jet pipe, and be provided with that a circle is connected with through hole on madial wall is annular defeated
Groove, madial wall is sent circumferentially to be additionally provided with some along the axially extending longitudinally fed groove of mould, the longitudinally fed groove is defeated with annular
Groove is sent to communicate；The mold pad is provided with the guide channel communicated with longitudinally fed groove.
4. mould liquid nitrogen according to claim 3 cools down constant temperature pressurizing unit, it is characterised in that：The through hole is near mould
The termination of side is the bellmouth corresponding with conveying nozzle-end.
5. mould liquid nitrogen according to claim 1 cools down constant temperature pressurizing unit, it is characterised in that：The mold system outlet
End is provided with infrared temperature detector.
6. mould liquid nitrogen according to claim 1 cools down constant temperature pressurizing unit, it is characterised in that：The cryogenic vacuum hard tube
Road is made with the soft connecting leg of cryogenic vacuum of 0Cr18Ni9 stainless steels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710254563.7A CN106825099A (en) | 2017-04-18 | 2017-04-18 | Mould liquid nitrogen cools down constant temperature pressurizing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710254563.7A CN106825099A (en) | 2017-04-18 | 2017-04-18 | Mould liquid nitrogen cools down constant temperature pressurizing unit |
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| Publication Number | Publication Date |
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| CN106825099A true CN106825099A (en) | 2017-06-13 |
Family
ID=59146970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710254563.7A Pending CN106825099A (en) | 2017-04-18 | 2017-04-18 | Mould liquid nitrogen cools down constant temperature pressurizing unit |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107159737A (en) * | 2017-07-10 | 2017-09-15 | 广东工业大学 | A kind of extruder |
| CN108500076A (en) * | 2018-05-22 | 2018-09-07 | 浙江海亮新材料有限公司 | A kind of device and method accurately controlling aluminium section hot-extrusion die local temperature |
| CN111346937A (en) * | 2020-03-31 | 2020-06-30 | 福建省闽发铝业股份有限公司 | Constant-temperature high-speed extrusion liquid nitrogen cooling device |
| CN111375647A (en) * | 2020-05-20 | 2020-07-07 | 西南铝业（集团）有限责任公司 | Extrusion die cooling system |
| CN111417473A (en) * | 2017-11-28 | 2020-07-14 | Cvs公司 | Liquid nitrogen cooling system of aluminum extrusion die |
| CN112387801A (en) * | 2020-09-30 | 2021-02-23 | 成都标建铝业有限公司 | Liquid nitrogen cooling device of aluminum profile extrusion die |
| CN113028697A (en) * | 2021-03-22 | 2021-06-25 | 昆山浩测仪器有限公司 | Control system for liquid nitrogen refrigeration equipment and liquid nitrogen refrigeration equipment |
| CN114011892A (en) * | 2021-10-29 | 2022-02-08 | 华中科技大学 | Temperature-speed-controllable ultrasonic vibration-assisted thin-wall capillary drawing forming device and method |
| CN114260329A (en) * | 2021-05-07 | 2022-04-01 | 大连理工大学 | Ultra-low temperature extrusion forming method and device for high-entropy alloy thin-walled tube |
| CN114535329A (en) * | 2022-01-19 | 2022-05-27 | 辽宁忠旺集团有限公司 | Production method of aviation oil guide pipe |
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| CN206613862U (en) * | 2017-04-18 | 2017-11-07 | 辽宁忠旺集团有限公司 | Mould liquid nitrogen cools down constant temperature pressurizing unit |
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| JP2000051929A (en) * | 1998-08-06 | 2000-02-22 | Furukawa Electric Co Ltd:The | Rotary wheel type continuous extrusion device and production of metal extruded material |
| CN1579660A (en) * | 2003-08-06 | 2005-02-16 | 机械工业部西安重型机械研究所 | Recipient for extruding machine |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107159737A (en) * | 2017-07-10 | 2017-09-15 | 广东工业大学 | A kind of extruder |
| CN111417473A (en) * | 2017-11-28 | 2020-07-14 | Cvs公司 | Liquid nitrogen cooling system of aluminum extrusion die |
| CN108500076A (en) * | 2018-05-22 | 2018-09-07 | 浙江海亮新材料有限公司 | A kind of device and method accurately controlling aluminium section hot-extrusion die local temperature |
| CN111346937A (en) * | 2020-03-31 | 2020-06-30 | 福建省闽发铝业股份有限公司 | Constant-temperature high-speed extrusion liquid nitrogen cooling device |
| CN111375647A (en) * | 2020-05-20 | 2020-07-07 | 西南铝业（集团）有限责任公司 | Extrusion die cooling system |
| CN112387801A (en) * | 2020-09-30 | 2021-02-23 | 成都标建铝业有限公司 | Liquid nitrogen cooling device of aluminum profile extrusion die |
| CN113028697A (en) * | 2021-03-22 | 2021-06-25 | 昆山浩测仪器有限公司 | Control system for liquid nitrogen refrigeration equipment and liquid nitrogen refrigeration equipment |
| CN114260329A (en) * | 2021-05-07 | 2022-04-01 | 大连理工大学 | Ultra-low temperature extrusion forming method and device for high-entropy alloy thin-walled tube |
| CN114260329B (en) * | 2021-05-07 | 2022-12-06 | 大连理工大学 | Ultra-low temperature extrusion forming method and device for high-entropy alloy thin-walled tube |
| CN114011892A (en) * | 2021-10-29 | 2022-02-08 | 华中科技大学 | Temperature-speed-controllable ultrasonic vibration-assisted thin-wall capillary drawing forming device and method |
| CN114011892B (en) * | 2021-10-29 | 2022-07-05 | 华中科技大学 | Temperature-speed-controllable ultrasonic vibration-assisted thin-wall capillary drawing forming device and method |
| CN114535329A (en) * | 2022-01-19 | 2022-05-27 | 辽宁忠旺集团有限公司 | Production method of aviation oil guide pipe |
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Application publication date: 20170613 |