CN108339852A - A kind of milling method applying pulse current on roll - Google Patents
A kind of milling method applying pulse current on roll Download PDFInfo
- Publication number
- CN108339852A CN108339852A CN201810137580.7A CN201810137580A CN108339852A CN 108339852 A CN108339852 A CN 108339852A CN 201810137580 A CN201810137580 A CN 201810137580A CN 108339852 A CN108339852 A CN 108339852A
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- Prior art keywords
- roll
- pulse current
- metal
- pulse
- current
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B9/00—Measures for carrying out rolling operations under special conditions, e.g. in vacuum or inert atmosphere to prevent oxidation of work; Special measures for removing fumes from rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/38—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets, pack rolling
- B21B2001/386—Plates
Abstract
The invention belongs to double metallic composite material rolling technical fields, and in particular to a method of pulse current being applied to improve ply-metal bond strength to top and bottom rolls during the rolling process.It mainly comprises the following steps：Coating metal and parent metal roll pre-treatment, topping roll or bottom roll make pulse electric current, start milling train and are rolled.A kind of milling method applying pulse current on roll of the present invention, is to increase the pulse power during the rolling process, and the pulse current of the positive and negative anodes output of the pulse power flows through roll and plank by different modes, forms closed circuit.Advantage is：Coating metal and parent metal elements diffusion are promoted, diffuser efficiency is improved, reduces roll-force, improves bond strength, improves Rolling Production efficiency.
Description
Technical field
The invention belongs to double metallic composite material rolling technical fields, and in particular to a kind of to be applied during the rolling process to roll
The method for adding pulse current to improve composite plate bond strength.
Background technology
With the rapid development of modern science and technology, people are higher and higher to the performance requirement of material, structure to material
The improvement of efficiency requires also increasingly stronger.In most cases, using single metal material it is difficult to meet engineering structure to it
Requirement in performance and cost.Then, integrate the physics of different materials, chemistry, mechanical property and price difference
Advanced composite material (ACM) comes into being, this will effectively utilize the good characteristic of material, overcomes and makes up homogenous material performance not
Foot, obtains the material of superior comprehensive performance.
Metallic composite is to make its knot by the methods of pressurizeing, heating by two or more different metal material
It closes interface and reaches metallurgical binding and manufactured.Ply-metal because it has the good characteristic of coating metal and parent metal,
It is widely used in many aspects such as aerospace, mechanical-electric, telecommunications, home life.Currently, production composite metal plate
Method mainly have roll-bonding method and explosion composite method.The metal composite board size of explosion composite method production is smaller, it is difficult to full
The demand of sufficient user, while this method energy expenditure is big, pollutes environment, lumber recovery is low.Roll-bonding method can be relatively easily
Large scale composite metal plate is produced, easy to operate, at low cost, environmental pollution is small, it is easy to accomplish automated production.
With the fast development of plank industry and the variation of market comsupton structure, new consumer field is to composite metal plate
Bond strength require increasingly to improve, this so that original rolling equipment and technique are difficult to meet the requirement of new product.
The macroscopic deformation feature that metal material is shown in forming process and its microstructure state and deformation mechanism
There is close contact.Existing numerous studies show：Due to the influence of pulse current, the more conventional plastic deformation of flow of metal feature
There are many differences, such as deformability improves, flow stress declines, material structure refines etc..The introducing of pulse current causes
Metal material is set to generate electro plastic effect, crack arrest effect, polar effect etc. in deformation process, such material is in formability
Energy, deformation characteristics etc. show the feature different from conventional plastic deformation.
The introducing of pulse current can influence original by applying the additional-energies such as thermal energy, electronic kinetic energy, electric energy to material
The result of random thermal motion of son can be obviously improved material when highdensity electric current is transferred in very short time in metal material
Interior atoms, vacancy diffusivity, influence the recrystallization process of material by changing the energy at fault in material, promote simultaneously
Into the sliding and climb motion of dislocation.Therefore, if pulse current applied in the operation of rolling of double metallic composite material, energy
So that the metal material of different distortion ability is reached synchronous deformation, inhibits composite material side to split situation, improve the knot of composite metal plate
Intensity is closed, production efficiency is improved.
Invention content
To improve ply-metal plastic deformation ability, inhibits composite plate edge cracks, improve metal composite layer element
Diffuser efficiency, enhances bond strength, and the present invention provides a kind of method improving ply-metal bond strength.
The present invention is achieved by the following technical solutions：A kind of milling method applying pulse current on roll,
Apply pulse current on roll so that current loop, the application side of the pulse current are formed between roll and bimetal plate
Formula includes（a）、（b）、（c）With（d）A kind of middle applying mode：
（a）Pulse current is from one end of topping roll into same from bottom roll brings out；
（b）Pulse current is from one end of topping roll into another from bottom roll brings out；
（c）Pulse current is from one end of topping roll into another from topping roll brings out；
（d）Pulse current is from one end of bottom roll into another from bottom roll brings out.
As being further improved for technical solution of the present invention, the pulse current power is 10-50KW, and voltage magnitude is
10-320V, pulse frequency 1-3000Hz, pulse width are 20-4000 μ s.
As being further improved for technical solution of the present invention, the upper layer of the bimetal plate is coating metal, and lower layer is
Parent metal；And topping roll corresponds to coating metal, and bottom roll corresponds to parent metal.
As being further improved for technical solution of the present invention, the parent metal is in steel alloy, titanium, aluminium, copper, zinc, magnesium
One kind；The coating metal is one kind in steel alloy, titanium, aluminium, copper, zinc, magnesium.
The present invention is compared with traditional rolling technique, and there are following advantages：
1, the present invention during the rolling process, to topping roll and bottom roll make pulse power supply so that bimetallic is multiple in the operation of rolling
Plywood can improve the plastic deformation ability of sheet metal by pulse current, reduce roll-force, improve the work roll cooling longevity
Life inhibits composite plate edge cracks, improves the bond strength of composite metal plate.
2, the present invention is during the rolling process to applying high energy pulse electric current, pulse electricity on upper and lower roll or sheet metal
Stream can cause fuel factor between two metals, improve the diffusivity between two kinds of metallic atoms, overcome energy barrier, be conducive to
The progress of Recovery and recrystallization improves plastic deformation, improves the bond strength of composite metal plate.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is pulse current of the present invention（a）Applying mode.
Fig. 2 is pulse current of the present invention（b）Applying mode.
Fig. 3 is pulse current of the present invention（c）Applying mode.
Fig. 4 is pulse current of the present invention（d）Applying mode.
1- topping rolls in figure, 2- coating metals, 3- parent metals, 4- bottom rolls, the 5- pulse powers.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, technical scheme of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
Technical scheme of the present invention is described in detail below in conjunction with the accompanying drawings.
A kind of milling method applying pulse current on roll, applies pulse current on roll so that roll with it is double
Current loop is formed between sheet metal, the applying mode of the pulse current includes（a）、（b）、（c）With（d）A kind of middle application
Mode：
（a）Pulse current is from one end of topping roll 1 into same from bottom roll 4 brings out（As shown in Figure 1）；
（b）Pulse current is from one end of topping roll 1 into another from bottom roll 4 brings out（As shown in Figure 2）；
（c）Pulse current is from one end of topping roll 1 into another from topping roll 1 brings out（As shown in Figure 3）；
（d）Pulse current is from one end of bottom roll 4 into another from bottom roll 4 brings out（As shown in Figure 4）.
Preferably, the pulse current power is 10-50KW, voltage magnitude 10-320V, pulse frequency 1-
3000Hz, pulse width are 20-4000 μ s.
When it is implemented, the upper layer of the bimetal plate is coating metal 2, lower layer is parent metal 3；And topping roll
1 corresponds to coating metal 2, and bottom roll 4 corresponds to parent metal 3.
Preferably, the parent metal 3 is one kind in steel alloy, titanium, aluminium, copper, zinc, magnesium；The coating metal 2 is
One kind in steel alloy, titanium, aluminium, copper, zinc, magnesium.Since the conductive capability of metal material is different, the present invention will be according to metal material
Difference, different pulse current parameters is set, to achieve the purpose that different distortion drag metal cooperative transformation, reduces rolling
Power improves the plastic deformation ability of ply-metal, inhibits crack propagation, improves composite plate bond strength and production efficiency.
Embodiment
By taking copper/Al bimetal plank as an example, preparation method is as follows：
The technical pure copper coin that material selection size is 200mm × 50mm × 2mm and the fine aluminium that size is 200mm × 50mm × 8mm
Plate, fine copper plate and pure aluminum plate are polished, polished, and plate surface is cleaned with acetone；
It is rolled on the roller diameters double-roll rolling mills such as equal rollers speed（Roller long 350mm, roller diameter 320mm）.
Make pulse power supply 5, pulse peak current density is 150A/mm when being applied to bimetal plate processing sections2, pulse
Interval time 10s.
Start milling train, slab is sent among the roll of rotation by mill speed 0.1m/s with push plate.
Fig. 1 show current loop embodiment schematic diagram, the positive and negative anodes of the pulse power 5 respectively with topping roll 1 and under roll
Roller 4 is connected, and electric current flows to topping roll 1 by the anode of the pulse power 5, and topping roll 1 conveys electrical current to down through bimetal plate
Roll 4, ultimate current flow back to the cathode of the pulse power 5, forming circuit.
During the rolling process, by applying pulse current to top and bottom rolls, roll-force can be reduced, compound edges of boards are inhibited
It splits, improves milling train service life.The presence of pulse current improves metallic atom diffusivity, and dislocation is helped to overcome energy barrier, profit
In realizing crystal grain refinement, be conducive to the progress of the softening process such as Recovery and recrystallization, improve plastic deformation, it is energy saving, it improves
Production efficiency.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (4)
1. a kind of milling method applying pulse current on roll, which is characterized in that apply pulse current on roll so that
Current loop is formed between roll and bimetal plate, the applying mode of the pulse current includes（a）、（b）、（c）With（d）In
A kind of applying mode：
（a）Pulse current is from topping roll（1）One end into from bottom roll（4）Same bring out；
（b）Pulse current is from topping roll（1）One end into from bottom roll（4）Another bring out；
（c）Pulse current is from topping roll（1）One end into from topping roll（1）Another bring out；
（d）Pulse current is from bottom roll（4）One end into from bottom roll（4）Another bring out.
2. a kind of milling method applying pulse current on roll according to claim 1, which is characterized in that the arteries and veins
It is 10-50KW, voltage magnitude 10-320V, pulse frequency 1-3000Hz to rush current power, and pulse width is 20-4000 μ s.
3. a kind of milling method applying pulse current on roll according to claim 1 or 2, which is characterized in that institute
The upper layer for stating bimetal plate is coating metal（2）, lower layer is parent metal（3）；And topping roll（1）Corresponding coating metal
（2）, bottom roll（4）Corresponding parent metal（3）.
4. a kind of milling method applying pulse current on roll according to claim 3, which is characterized in that the base
Layer metal（3）For one kind in steel alloy, titanium, aluminium, copper, zinc, magnesium；The coating metal（2）For steel alloy, titanium, aluminium, copper,
One kind in zinc, magnesium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810137580.7A CN108339852A (en) | 2018-02-10 | 2018-02-10 | A kind of milling method applying pulse current on roll |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810137580.7A CN108339852A (en) | 2018-02-10 | 2018-02-10 | A kind of milling method applying pulse current on roll |
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| CN108339852A true CN108339852A (en) | 2018-07-31 |
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| CN201810137580.7A Pending CN108339852A (en) | 2018-02-10 | 2018-02-10 | A kind of milling method applying pulse current on roll |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109468480A (en) * | 2018-11-26 | 2019-03-15 | 太原理工大学 | The method that the vacuum canning rolling of impulse electric field auxiliary prepares metal-base composites |
| CN109514272A (en) * | 2019-01-10 | 2019-03-26 | 上海交通大学 | A kind of electric heating auxiliary pack rolling soldering method |
| CN109849455A (en) * | 2019-02-22 | 2019-06-07 | 北京科技大学 | A kind of magnesium/steel layer shape composite material and preparation method |
| CN109940044A (en) * | 2019-04-04 | 2019-06-28 | 太原科技大学 | A kind of magnesium alloy plate electric-pulse cold rolling method |
| CN110788136A (en) * | 2019-10-10 | 2020-02-14 | 太原理工大学 | Method for preparing titanium steel composite plate through pulse current auxiliary hot rolling |
| CN112718862A (en) * | 2020-12-17 | 2021-04-30 | 太原理工大学 | Pulse current auxiliary rolling device and method for titanium and stainless steel variable-thickness composite plate |
| CN114522988A (en) * | 2022-01-29 | 2022-05-24 | 太原理工大学 | Roller conveying device and method applying current and adjustable in space for plate strip rolling |
| CN115121608A (en) * | 2022-07-13 | 2022-09-30 | 燕山大学 | Pulse current-assisted different-temperature rolling composite feeding device and composite method |
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| CN106077092A (en) * | 2016-06-24 | 2016-11-09 | 燕山大学 | The device of the low electric heating Pulse Electric Current with High Density assistant metal operation of rolling |
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| CN202169276U (en) * | 2011-02-09 | 2012-03-21 | 清华大学深圳研究生院 | System for rolling metal material in electroplastic effect and thermal plasticity combined manner |
| CN102489530A (en) * | 2011-12-01 | 2012-06-13 | 上海交通大学 | Preparation method and device for three-dimensional (3D) gradient plates produced through multi-layer rolling and multi-point electric pulse treatment |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109468480A (en) * | 2018-11-26 | 2019-03-15 | 太原理工大学 | The method that the vacuum canning rolling of impulse electric field auxiliary prepares metal-base composites |
| CN109468480B (en) * | 2018-11-26 | 2020-09-18 | 太原理工大学 | Method for preparing metal-based composite material by vacuum sheath rolling assisted by pulse electric field |
| CN109514272A (en) * | 2019-01-10 | 2019-03-26 | 上海交通大学 | A kind of electric heating auxiliary pack rolling soldering method |
| CN109849455A (en) * | 2019-02-22 | 2019-06-07 | 北京科技大学 | A kind of magnesium/steel layer shape composite material and preparation method |
| CN109940044A (en) * | 2019-04-04 | 2019-06-28 | 太原科技大学 | A kind of magnesium alloy plate electric-pulse cold rolling method |
| CN110788136A (en) * | 2019-10-10 | 2020-02-14 | 太原理工大学 | Method for preparing titanium steel composite plate through pulse current auxiliary hot rolling |
| CN112718862A (en) * | 2020-12-17 | 2021-04-30 | 太原理工大学 | Pulse current auxiliary rolling device and method for titanium and stainless steel variable-thickness composite plate |
| CN114522988A (en) * | 2022-01-29 | 2022-05-24 | 太原理工大学 | Roller conveying device and method applying current and adjustable in space for plate strip rolling |
| CN114522988B (en) * | 2022-01-29 | 2023-12-29 | 太原理工大学 | Roller conveying device and method for applying current and adjusting distance in plate and strip rolling |
| CN115121608A (en) * | 2022-07-13 | 2022-09-30 | 燕山大学 | Pulse current-assisted different-temperature rolling composite feeding device and composite method |
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Application publication date: 20180731 |