CN206721341U - A kind of heat-treatment furnace for realizing extrusion billet temperature gradient distribution - Google Patents
A kind of heat-treatment furnace for realizing extrusion billet temperature gradient distribution Download PDFInfo
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- CN206721341U CN206721341U CN201720318378.5U CN201720318378U CN206721341U CN 206721341 U CN206721341 U CN 206721341U CN 201720318378 U CN201720318378 U CN 201720318378U CN 206721341 U CN206721341 U CN 206721341U
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Abstract
The utility model discloses a kind of heat-treatment furnace for realizing extrusion billet temperature gradient distribution, the heat-treatment furnace is made up of gas heating area, air-cooled area and electrical induction area three parts, and in gas heating area, heating and thermal insulation is carried out to extrusion billet；In air-cooled area, wind cooling temperature lowering is carried out from the afterbody of heating blank；In sensing heating area, the outside of extrusion billet is heated.And the high temperature air of air-cooled area's outflow recycles gas heating area, has energy-saving effect.Ultimately form the thermograde that axial head height tail is low, radially high outside and low outside and index extrusion billet.Crimp regional temperature more accurately controls during this blank is advantageous to Isothermal Extrusion, and can reduce the frictional force of blank and recipient in extrusion process, so as to reduce equipment energy consumption, improves the life-span of recipient.
Description
Technical field
The utility model belongs to metal material field, is related to metal and alloy extrusion blank heating technique, and in particular to one
Kind realizes the heat-treatment furnace of the blank temperature gradient distribution of isothermal speed change extruding.
Background technology
Extruding is the important method of nonferrous materials forming.With fields such as automotive light weight technology, Aero-Space
Fast development, the demand of high-performance squeeze wood is improved constantly.At present, with the rapid development of aluminum extrusion industry and technology, go out
The extruding of tongue pattern, the extruding of set of planes matched moulds, big cross section extruding, water cooled mo(u)ld extruding, flat extruding, Spread Extrusion, accurate gas and water are showed
The technologies such as the extruding of (mist) cooling press quenching, efficient reversed extruding, Isothermal Extrusion.But for the aluminium alloy that deformation performance is poor
For (such as 2000 systems and 7000 are alloy) and most of magnesium alloy, because its thermoplasticity is poor, hot cracking tendency is strong, Zhi Neng
Processed under narrower texturing process conditions.Therefore, structure property on length direction only could be obtained using isothermal extrusion technology
Uniform product, to meet the strict demand of high-performance squeeze wood.In recent years, the correlative study of Isothermal Extrusion technology and exploitation by
Gradually it is taken seriously.By Isothermal Extrusion, size shape stabilization, the product of even tissue can not only be obtained, moreover it is possible to improve its finished product
Rate and production efficiency, meet that aluminium alloy extrusions integrally possesses height than strong, high than mould and the mechanical property of high tenacity, avoid section bar from going out
Now distort, the serious phenomenon such as crackle.
At present, Isothermal Extrusion technology generally has two kinds of implementations, and one kind is to use speed control Isothermal Extrusion, that is, is passed through
Extrusion speed is adjusted, realizes that the extrusion temperature of product keeps constant, such as Chinese utility model patent (publication number：
CN103100575A a kind of equi-temperature extrusion method of speed Discrete control) is disclosed, it is still, this to pass through extrusion speed curve
The method of control, because aluminium alloy cast rod is in extrusion process, the relative motion extruded between room and aluminium alloy cast rod produces
Frictional heat, if the temperature that aluminium alloy cast rod enters extruding room is constant along its length, extrusion speed is protected in extrusion process
Hold constant, aluminium alloy cast rod back material experienced the friction process of longer path, into temperature during deformed region
Rise, so as to cause aluminum alloy extrusion section bar temperature and mechanical property at front end exit to change along its length；Another kind is to adopt
With the Isothermal Extrusion of the blank of temperature distribution gradient, that is, utilize the low-temperature region for deforming thermal compensation blank afterbody so that blank
Keep constant in the temperature of mould outlet.The blank for producing temperature distribution gradient has two methods, is gradient temperature heat method respectively
With terraced warm water cold process.
However, research shows that in the Isothermal Extrusion extrusion process of the blank of temperature distribution gradient frictional heat is to section bar
The influence of section temperature nonunf ormity is maximum, has exceeded the heat transfer between plastic deformation heat and metal and tool and mould【Hou Wen
The Heat transfer of flourish aluminium alloy extrusions extrusion process and temperature control research [D] University of Science ＆ Technology, Beijing, 2015.】.In addition, aluminium
The extruding of alloy, which is studied, to be shown, the average friction coefficient of material raises 300 DEG C -500 DEG C with temperature, and 1.6 are reduced to from 2.1【
Equivalent characterize of friction and wear behavior studies [D] Hunan University in bright .6061 aluminum alloy heats extrusion process, and 2014:22】.Friction system
Several reductions can significantly reduce equipment energy consumption, can also reduce frictional heat, so as to more accurately control the temperature in crimp region.
Therefore, influence of the frictional heat to thermograde in Isothermal Extrusion extrusion process, not only increase energy expenditure, shorten and squeeze
In the pressure cylinder life-span, also it is unable to reach the high Isothermal Extrusion effect of accuracy.
Utility model content
To overcome above technical problem, the purpose of this utility model is that design one kind realizes extrusion billet temperature gradient distribution
Heat-treatment furnace, obtaining Temperature Distribution is：The extrusion billet that axial head height tail is low, radial direction is high outside and low outside.
In order to solve the above technical problems, the technical solution of the utility model is：
A kind of heat-treatment furnace for realizing extrusion billet temperature gradient distribution, is made up of following three parts successively：Gas heating
Area, air-cooled area, sensing heating area.
It is to base that the utility model, which realizes that the heat-treatment furnace of extrusion billet temperature gradient distribution sets the effect of gas heating area,
Uniformly heating is uniformly distributed blank temperature to material；It is that blank is cooled down that heat-treatment furnace, which sets air-cooled area's effect, realizes blank
Axial head height tail low-temperature gradient；It is to carry out reheating to blank that heat-treatment furnace, which sets the effect in sensing heating area, realizes base
Material diameter to high outside and low outside thermograde.
Preferably, gas heating area extrusion billet head one end sets combustor, and combustor is connected with natural gas liquid storage tank,
Natural gas is passed through combustion heating in combustor.
Preferably, air blower is set in afterbody one end of air-cooled area's extrusion billet.
Preferably, air-cooled area's air blower other end is connected by pipeline with combustor, and the high temperature air of air-cooled area's outflow leads to
Cross heated by natural gas in combustion engine and enter gas heating area.
Head one end of air-cooled area's extrusion billet is connected by the utility model by pipeline with combustor, air-cooled area's outflow
High temperature air carries out heating and thermal insulation by heated by natural gas in combustion engine to extrusion billet, realizes that the high temperature air of air-cooled area's outflow follows
Ring uses gas heating area, by the repeated recycling utilize of hot-air, serves energy-saving effect.
Preferably, the blank is magnesium alloy or aluminium alloy.
Preferably, gas heating area heating-up temperature is higher than 50-200 DEG C of the recrystallization temperature of blank.
Preferably, the target temperature difference end to end of air-cooled area's blank is 10-30 DEG C
Preferably, sensing heating area heating-up temperature is less than 10-20 DEG C of the burnt temperature of material, heat penetration 2-
20mm。
Preferably, be also equipped with the heat-treatment furnace for realizing extrusion billet temperature gradient distribution Bar conveyor structure,
Temperature measuring mechanism, the side wall of the heat-treatment furnace are additionally provided with observation window.
Realize different zones of the temperature measuring equipment of the heat-treatment furnace of extrusion billet temperature gradient distribution for detecting bar
Temperature, the temperature for making bar reach setting in the corresponding gas heating area of heat-treatment furnace, air-cooled area, sensing heating area, realizes base
The axial head height tail of material is low, radially high outside and low outside temperature gradient distribution.
It is connected by temperature measuring equipment, Bar conveyor structure by high temperature resistant wire with outside automaton, thermometric dress
Put and reflect bar temperature in real time, automaton controls the operation and braking of Bar conveyor structure, and then controls bar to exist
The corresponding gas heating area of heat-treatment furnace, air-cooled area, the heat time in sensing heating area.
Preferably, the Bar conveyor structure includes frame, bar stand, guide rail, frame driving device, frame braking
Device, the frame are slidably connected by wheel and guide rail, and frame driving device, frame brake apparatus are arranged in frame, institute
Temperature measuring equipment, frame driving device, frame brake apparatus is stated to be connected with outside automaton by high temperature resistant wire.
Bar of the present utility model is placed on the bar stand in frame, and frame driving device promotes frame to be transported along guide rail
Dynamic that bar is fed sequentially into gas heating area, air-cooled area, sensing heating area, frame brake apparatus carries out braking to frame makes machine
Frame rests in the heat time of corresponding region setting, meets the gradient-heated requirement of bar.
Relative to prior art, advantageous effects of the present utility model are：
1st, extrusion billet is heated using heat-treatment furnace of the present utility model, it is possible to achieve the gradient distribution of its temperature：That is axle
It is low, radially high outside and low outside to head height tail.Crimp regional temperature is more accurately during this blank is advantageous to Isothermal Extrusion
Control, and the frictional force of blank and recipient in extrusion process can be reduced, so as to reduce energy consumption, improve the longevity of recipient
Life.
2nd, during blank heating, it is connected by head one end of air-cooled area's extrusion billet by pipeline with combustor, wind
The high temperature air of cold-zone outflow carries out heating and thermal insulation by heated by natural gas in combustion engine to extrusion billet, realizes air-cooled area's outflow
High temperature air recycles gas heating area, by the repeated recycling utilize of hot-air, has obvious energy-saving effect.
3rd, in heating furnace of the present utility model by temperature measuring equipment, Bar conveyor structure by high temperature resistant wire with it is outside from
Dynamic control device connection, temperature measuring equipment reflect bar temperature automaton controls the operation of Bar conveyor structure in real time
And braking, and then control bar the corresponding gas heating area of heat-treatment furnace, air-cooled area, sensing heating area heat time, it is real
The automation of whole thermograde heating process is showed, labor strength has been reduced, in the continuous, steady of whole heat gradient direction
It is qualitative, the error because of caused by artifact is reduced, substantially increases production efficiency.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model heat-treatment furnace；
Fig. 2 is the structural scheme of mechanism of the utility model Bar conveyor structure；
Fig. 3 is blank temperature field distribution of the utility model in the different heat treatment stage；
Fig. 4 is change schematic diagram of the utility model in different phase temperature.
In figure：1st, gas heating area, 2, air-cooled area, 3, sensing heating area, 4, air blower, 5, combustor, 6, natural gas liquid
Storage tank, 7 bars, 8, frame, 9, guide rail, 10, bar stand, 11, frame driving device, 12, frame brake apparatus, 13, car
Wheel.
Embodiment
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
The utility model is further illustrated with reference to the accompanying drawings and examples, in order to the reason of technical staff of the same trade
Solution：
Embodiment 1
The heat-treatment furnace for realizing extrusion billet temperature gradient distribution that the present embodiment uses, successively by following three parts group
Into：Gas heating area, air-cooled area, sensing heating area, Bar conveyor structure, temperature measuring mechanism are also equipped with heat-treatment furnace, it is described
The side wall of heat-treatment furnace is additionally provided with observation window, Bar conveyor structure include frame, bar stand, guide rail, frame driving device,
Frame brake apparatus, the frame are slidably connected by wheel and guide rail, and frame driving device, frame brake apparatus are arranged on machine
On frame, the temperature measuring equipment, frame driving device, frame brake apparatus are connected by high temperature resistant wire and outside automaton
Connect.
The temperature measuring equipment of the heat-treatment furnace of the present utility model for realizing extrusion billet temperature gradient distribution is used to detect bar
Different zones temperature, bar is reached setting in the corresponding gas heating area of heat-treatment furnace, air-cooled area, sensing heating area
Temperature, realize the temperature gradient distribution that the axial head height tail of blank is low, radial direction is high outside and low outside.After air-cooled and after sensing heating
Blank temperature field distribution is as shown in figure 3, the temperature of different phase blank changes with time as shown in Figure 4.
Gas heating area sets combustor in extrusion billet head one end, and combustor is connected with natural gas liquid storage tank, by day
Right gas, which is passed through in combustor, to be burnt, and realizes that extrusion billet uniformly heats, and air blast is set in afterbody one end of air-cooled area's extrusion billet
Machine, it is connected in air-cooled area's other end connecting pipe with combustor, the high temperature air of air-cooled area's outflow is added by natural gas in combustion engine
Heat enters gas heating area, realizes that the high temperature air of air-cooled area's outflow recycles gas heating area, passes through the weight of hot-air
Recycle again, serve energy-saving effect.
Bar is placed on the bar stand in frame, and frame driving device promotes frame to move along the rail bar successively
Gas heating area, air-cooled area, sensing heating area are transported to, frame brake apparatus carries out braking to frame makes frame rest in accordingly
Region setting heat time, meet bar gradient-heated requirement.Pass through temperature measuring equipment, frame driving device, frame system
Dynamic device is connected by high temperature resistant wire with outside automaton, and temperature measuring equipment reflects bar temperature in real time, automatic control
The operation of device control frame driving device, frame brake apparatus processed, and then control bar to add in the corresponding combustion gas of heat-treatment furnace
Hot-zone, air-cooled area, the heat time in sensing heating area.
It is to base that the utility model, which realizes that the heat-treatment furnace of extrusion billet temperature gradient distribution sets the effect of gas heating area,
Uniformly heating is uniformly distributed blank temperature to material；It is that blank is cooled down that heat-treatment furnace, which sets air-cooled area's effect, realizes blank
Axial head height tail low-temperature gradient；It is to carry out reheating to blank that heat-treatment furnace, which sets the effect in sensing heating area, realizes base
Material diameter to high outside and low outside thermograde.
The major parameter of the heat treatment for the extrusion billet temperature gradient distribution that the present embodiment uses for：
Billet size：Φ120×L500mm
Types of alloys：A7075 aluminium alloys
Extruder type：800t
Gas heating area heating-up temperature and time：350 DEG C, 2h
Blank target temperature difference end to end：30℃
Air cooler cooling velocity and time：1m3/ min, cool down 2min
Electromagnetic induction heating temperature and time：470 DEG C, 8s
Electromagnetic induction heating frequency：5KHZ
Electromagnetic induction heating depth：5mm
The specific work process of the heat-treatment furnace heating rods and bars of aluminium alloy of extrusion billet temperature gradient distribution：
Step 1：Rods and bars of aluminium alloy is put into gas heating area and is heated to 350 DEG C, is incubated 2h；
Step 2：In air-cooled area with 1m3/ min cools down 2min, and tail temperature drops to 320 DEG C；
Step 3：In electromagnetic induction heating area, with induction frequencies 5KHZ, heat time 8s, 480 DEG C are heated to, heat penetration
About 5mm.Realize prepared by low, the radially high outside and low outside terraced adiabator of the axial head height tail of 7075 aluminium alloys.
The hot-air in air-cooled area is recycled by pipeline in combustion gas area simultaneously, reaches the effect of energy-conservation.
Embodiment 2
What the present embodiment used realizes the heat-treatment furnace of extrusion billet temperature gradient distribution as described in Example 1.
The major parameter of the heat treatment for the extrusion billet temperature gradient distribution that the present embodiment uses for：
Billet size：Φ100×L500mm
Types of alloys：AZ31 magnesium alloys
Extruder type：800t
Gas heating area heating-up temperature and time：250 DEG C, 1.5h
Blank target temperature difference end to end：20℃
Air cooler cooling velocity and time：1m3/ min, cool down 1min
Electromagnetic induction heating temperature and time：420 DEG C, 10s
Electromagnetic induction heating frequency：6KHZ
Electromagnetic induction heating depth：4mm
The specific work process of the heat-treatment furnace heating magnesium alloy rod of extrusion billet temperature gradient distribution：
Step 1：Magnesium alloy rod is put into gas heating area and is heated to 250 DEG C, is incubated 1.5h；
Step 2：In air-cooled area with 1m3/ min cools down 1min, and tail temperature drops to 230 DEG C；
Step 3：In electromagnetic induction heating area, with induction frequencies 6KHZ, heat time 10s, 420 DEG C are heated to, heating is deep
Degree is about 4mm.Realize prepared by low, the radially high outside and low outside terraced adiabator of the axial head height tail of AZ31 magnesium alloys.
The hot-air in air-cooled area is recycled by pipeline in combustion gas area simultaneously, reaches the effect of energy-conservation.
Embodiment 3
The major parameter of the heat treatment for the extrusion billet temperature gradient distribution that the present embodiment uses for：
Billet size：Φ180×L500mm
Types of alloys：ZK61 magnesium alloys
Extruder type：800t
Gas heating area heating-up temperature and time：280 DEG C, 3h
Blank target temperature difference end to end：30℃
Air cooler cooling velocity and time：2m3/ min, cool down 2min
Electromagnetic induction heating temperature and time：420 DEG C, 10s
Electromagnetic induction heating frequency：4KHZ
Electromagnetic induction heating depth：6mm
The specific work process of the heat-treatment furnace heating magnesium alloy rod of extrusion billet temperature gradient distribution：
Step 1：Magnesium alloy rod is put into gas heating area and is heated to 250 DEG C, is incubated 1.5h；
Step 2：In air-cooled area with 1m3/ min cools down 1min, and tail temperature drops to 230 DEG C；
Step 3：In electromagnetic induction heating area, with induction frequencies 6KHZ, heat time 10s, 420 DEG C are heated to, heating is deep
Degree is about 4mm.Realize prepared by low, the radially high outside and low outside terraced adiabator of the axial head height tail of ZK60 magnesium alloys.
The hot-air in air-cooled area is recycled by pipeline in combustion gas area simultaneously, reaches the effect of energy-conservation.
The preferred embodiment of the application is the foregoing is only, is not limited to the application, for the skill of this area
For art personnel, the application can have various modifications and variations.It is all within spirit herein and principle, made any repair
Change, equivalent substitution, improvement etc., should be included within the protection domain of the application.
Claims (5)
1. a kind of heat-treatment furnace for realizing extrusion billet temperature gradient distribution, it is characterised in that be made up of successively following three parts：
Gas heating area, air-cooled area, sensing heating area；
The gas heating area is to set combustor in extrusion billet head one end, and combustor is connected with natural gas liquid storage tank, will
Natural gas, which is passed through in combustor, to burn, and realizes that extrusion billet uniformly heats；
The air-cooled area be air-cooled area's extrusion billet afterbody one end set air blower, air-cooled area's other end connecting pipe with
Combustor connects, and the high temperature air of air-cooled area's outflow enters gas heating area by heated by natural gas in combustion engine；
The gas heating area, air-cooled area, sensing heating area are sequentially connected；
Bar conveyor structure, temperature measuring mechanism are also equipped with the heat-treatment furnace, the side wall of the heat-treatment furnace is additionally provided with observation
Window；
The Bar conveyor structure includes frame, bar stand, guide rail, frame driving device, frame brake apparatus, the machine
Frame is slidably connected by wheel and guide rail, and frame driving device, frame brake apparatus are arranged in frame, the temperature measuring equipment,
Frame driving device, frame brake apparatus are connected by high temperature resistant wire with outside automaton.
2. the heat-treatment furnace as claimed in claim 1 for realizing extrusion billet temperature gradient distribution, it is characterised in that the blank
For magnesium alloy or aluminium alloy.
3. the heat-treatment furnace as claimed in claim 1 or 2 for realizing extrusion billet temperature gradient distribution, it is characterised in that described
Gas heating area heating-up temperature is higher than 50-200 DEG C of the recrystallization temperature of blank.
4. the heat-treatment furnace as claimed in claim 1 or 2 for realizing extrusion billet temperature gradient distribution, it is characterised in that described
The target temperature difference end to end of air-cooled area's blank is 10-30 DEG C.
5. the heat-treatment furnace as claimed in claim 1 or 2 for realizing extrusion billet temperature gradient distribution, it is characterised in that described
Sensing heating area heating-up temperature is less than 10-20 DEG C of the burnt temperature of material, heat penetration 2-20mm.
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| CN201720318378.5U CN206721341U (en) | 2017-03-29 | 2017-03-29 | A kind of heat-treatment furnace for realizing extrusion billet temperature gradient distribution |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106676436A (en) * | 2017-03-29 | 2017-05-17 | 山东省科学院新材料研究所 | Heat treatment furnace capable of achieving gradient distribution of temperature of extrusion billet and heat treatment method |
| CN111575470B (en) * | 2020-06-28 | 2021-01-15 | 西北工业大学 | Continuous temperature gradient heat treatment device and method for rod-shaped material |
-
2017
- 2017-03-29 CN CN201720318378.5U patent/CN206721341U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106676436A (en) * | 2017-03-29 | 2017-05-17 | 山东省科学院新材料研究所 | Heat treatment furnace capable of achieving gradient distribution of temperature of extrusion billet and heat treatment method |
| CN106676436B (en) * | 2017-03-29 | 2018-05-15 | 山东省科学院新材料研究所 | A kind of heat-treatment furnace and heat treatment method for realizing extrusion billet temperature gradient distribution |
| CN111575470B (en) * | 2020-06-28 | 2021-01-15 | 西北工业大学 | Continuous temperature gradient heat treatment device and method for rod-shaped material |
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