CN106914489A - A kind of rolling device and method for preparing function-graded material - Google Patents
A kind of rolling device and method for preparing function-graded material Download PDFInfo
- Publication number
- CN106914489A CN106914489A CN201710248009.8A CN201710248009A CN106914489A CN 106914489 A CN106914489 A CN 106914489A CN 201710248009 A CN201710248009 A CN 201710248009A CN 106914489 A CN106914489 A CN 106914489A
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- China
- Prior art keywords
- pulse current
- rolled piece
- roll
- slip ring
- electric brush
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
- B21B31/07—Adaptation of roll neck bearings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
-
- 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
Abstract
The present invention discloses a kind of rolling device and method for preparing function-graded material, its device is to transform delivery sheet as the internal feeding set for being embedded with coil on the basis of existing milling train, and an electric brush slip ring is set with the spindle nose of upper and lower roll both sides, the electric brush slip ring is fixed on corresponding bearing block, pulse current imported into the plastically deforming area of rolled piece by being arranged on the electric brush slip ring of topping roll both sides spindle nose, is derived from the both sides spindle nose of bottom roll.Controllable current is passed through to adjust the size of magnetic induction intensity in coil in feeding set, and the magnetic field can influence in rolled piece plastically deforming area the distribution of pulse current and then prepare function-graded material.The inventive method is the running parameter that required pulse current and control electric current are tried to achieve by FEM-software ANSYS, while certain prediction can also be carried out to result.The present invention can both prepare transverse gradients material, can also prepare longitudinal functionally gradient material (FGM), and predictive and controllability is strong, and operation is efficiently simple, is adapted to actual industrial production.
Description
Technical field
The present invention relates to the pulse current under magnetic fields metal processing sectors application, and in particular to one kind prepares ladder
Spend the rolling device and method of functional material.
Background technology
Function-graded material is a kind of material property along the material that a direction is in continuous graded, abbreviation FGM.Ladder
Degree functional material by the novel design of material thought that itself there is excellent performance and it is embodied, once proposition,
Cause the great attention of countries in the world material science worker immediately and launch research to it, so far, explored
Basic research method simultaneously prepares the function-graded material of many systems.But existing function-graded material preparation technology has
That operation difficulty is higher, result is difficult to predict, the continuity of resulting gradient performance is difficult to the shortcomings of controlling.In addition,
These methods also have certain limitation for synthesizing the functionally gradient material (FGM) that other are.
There are some researches show, the metal in deformation process is passed through pulse current and can cause that the resistance of deformation of metal is reduced,
Processing hardening phenomenon is reduced, and function of surface function is optimized, therefore application of the pulse current in intermetallic composite coating is more next
It is more extensive, there are many scholars that pulse current is applied among the techniques such as wire drawing, punching press, rolling.And in data with existing
In it can be found that the density of pulse current is different in work piece, the material property of the workpiece for obtaining also is differed.
In electrodynamics theory, the charged particle moved in electromagnetic field will be acted on by Lorentz force, will cause grain
The movement locus of son deflects.If therefore applying a pulse current and a controllable magnetic simultaneously in the operation of rolling
, the distribution of pulse current is influenceed by magnetic field, can make gained rolled piece performance that gradient is presented and be distributed, gradient function is completed with this
The preparation of material.
The content of the invention
There is problem for above-mentioned, enlightened by electrodynamics theory, due in metal electro plasticity process
The current density of pulse current is different in rolled piece, and the performance of resulting material is also differed after its processing, the band for moving in addition
Charged particle will be influenceed in magnetic field by Lorentz force, and its movement locus will deflect, if therefore same in the operation of rolling
When apply a pulse current and a controllable magnetic field so that the density of pulse current rolled piece spread direction present gradient
Distribution, the performance of the rolled piece obtained by it is spreading direction also by presentation gradient distribution, can change control in the operation of rolling in addition
The size of electric current processed and then the size in change magnetic field, gradient is distributed along longitudinal direction in the operation of rolling to make pulse current, so may be used
Making the material property of rolled piece can be also distributed with gradient profile in the vertical.
Based on above-mentioned design, the present invention seeks on the basis of existing milling train, there is provided a kind of function-graded material for preparing
Rolling device and method.
To realize object above, present invention employs following technical scheme：
A kind of rolling device for preparing function-graded material, including frame, upper and lower roll, roll bearing and bearing block,
Upper and lower roll is connected by roll bearing and bearing block with frame, and an electricity is set with the upper and lower roll both sides spindle nose
Brush slip ring, the electric brush slip ring is fixed on corresponding bearing block, the roll bearing and bearing block and electric brush slip ring and bearing
Insulation is equipped between seat, the upper and lower roll crevice place of both sides is arranged with feeding set before and after the frame, feeding set passes through spiral shell
Bolt is fixed in frame, and the feeding set is internal to be embedded with coil, and coil is encapsulated in feeding and covers interior, rolled by upper and lower end cap
Cheng Zhong, rolled piece is imported by pulse current electric brush slip ring respectively from the spindle nose of topping roll both sides, and from the spindle nose of bottom roll two ends
Electric brush slip ring derive, produce the controllable magnetic field, controllable magnetic field to make while controllable current will be passed through in the coil in two feedings set
Obtain pulse current and gradient distribution is presented in rolled piece plastically deforming area, so that rolled piece performance distribution gradient.
A kind of method for implementing apparatus of the present invention, the method is to aid in electro plasticity to roll by a controllable magnetic field
Process realizes the preparation of function-graded material, and controllable magnetic field is passed into control electric current and carrys out reality by the internal coil of feeding set
It is existing.The running parameter of control electric current and pulse current is drawn by FEM-software ANSYS progressive alternate, quantitative analysis.Specifically
Drafts when step is according to device and by the geometric parameter of rolled piece, resistivity, magnetic conductivity and work is set up and contains air
Finite element analysis model, to model apply boundary condition after, by carry out quantify solve with modification encourage, until searching out conjunction
Suitable excitation parameters, that is, applied control electric current and pulse current parameter, then by the two parameters be set to rolling
During control power supply and the pulse power parameter after carry out the operation of rolling.In the operation of rolling, one will ensure two feedings
The sense of current for covering Inside coil is identical, is used to ensure that the magnetic direction that two coils are produced is identical, secondly to ensure rolled piece
Enter roll gap after being passed through from a feeding set, then passed from another feeding set, be used to ensure the magnetic that two coils are produced
Concentrate and passed through from rolled piece in field.
The present apparatus transform delivery sheet as the internal feeding set for being embedded with coil on the basis of existing milling train.Pulse current leads to
Cross and be arranged on the electric brush slip ring of topping roll both sides spindle nose and imported into the plastically deforming area of rolled piece, led from the both sides spindle nose of bottom roll
Go out.Controllable current is passed through to adjust the size of magnetic induction intensity in coil in feeding set, and the magnetic field can influence rolled piece plasticity
The distribution of pulse current and then function-graded material is prepared in deformed area.
The present invention can both prepare transverse gradients material or prepare longitudinal functionally gradient material (FGM), and predictive and controllability is strong, behaviour
Make efficiently simple, be adapted to actual industrial production.
Compared with prior art, the invention has the advantages that：
1st, the present apparatus is not limited to the preparation of single function-graded material, is imitated with electro plasticity for can typically roll
The material answered can be processed as function-graded material, and versatility is stronger.
2nd, coil is embedded in feeding set inside in the present apparatus, can be produced by being passed through different size of electric current to coil
Different size of magnetic field so that gained magnetic field has controllability in the present apparatus.In addition in the operation of rolling, rolled piece passes through coil
When, rolled piece is equivalent to the iron core in coil so that the magnetic field concentration in coil reduces magnetic leakage and energy loss in rolled piece.
3rd, the present apparatus is passed through on the roll spindle nose of rotation using four electric brush slip rings by what pulse current was stablized, and is used
The power-up mode of symmetrical expression ensure that the stability and validity of electric current.
4th, the work that the present apparatus can try to achieve required pulse current and control electric current by FEM-software ANSYS is joined
Number, while certain prediction can also be carried out to result, it is possible to reduce research and development of products cycle, reduction R＆D costs.
Brief description of the drawings
Fig. 1 is the axle surveys view of apparatus of the present invention.
Fig. 2 is feeding set and internal structure schematic diagram in the present invention.
In figure：1- frames；2- topping rolls；3- roll bearings and bearing block；4- electric brush slip rings；5- bottom rolls；6- feeding sets；
7- feedings put end cap；8- coils；9- feedings cover bottom end cover.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention will be further described：
As shown in Figure 1 and Figure 2, apparatus of the present invention mainly include mainframe 1, topping roll 2, bottom roll 5, electric brush slip ring 4, roll
Roller bearing and bearing block 3, the internal feeding set 6 containing coil 8, topping roll 2 and bottom roll 5 pass through roll bearing and bearing block 3
It is connected with frame 1, electric brush slip ring 4 there are four, it is right to be respectively fitted on the both sides spindle nose of topping roll 2 and bottom roll 5 and be fixed on
On the bearing block answered, insulation processing will be wherein done between roll bearing and bearing block and electric brush slip ring and bearing block.Feeding set 6
There are two symmetrical placements both sides before and after frame 1, and feeding set 6 wants parallel just to topping roll 2 and the crack of bottom roll 5.Arteries and veins
Rushing the applying mode of electric current is：The both sides electric brush slip ring 4 of topping roll 2 is connected with the positive pole of the pulse power, and bottom roll both sides brush is slided
Ring 4 is connected with the negative pole of the pulse power.Electric brush slip ring 4 from the two end axles of topping roll 2 is introduced rolled piece by pulse current, under
Electric brush slip ring 4 in the two end axles of roll 5 is drawn.
As shown in Fig. 2 the inside of feeding set 6 is embedded with coil 8 in apparatus of the present invention, the applying mode of control electric current is, directly
In coil 8 inside stream plant-grid connection feeding set 6, and to ensure that the control electric current direction in former and later two coils 8 is identical.This
Invention is provided with symmetrical feeding set 6 before and after frame 1, and rolled piece will sequentially pass through the two feeding sets in the operation of rolling.
The method for implementing rolling device of the present invention, comprises the following steps that：
The drafts of rolled piece when step one, geometric parameter, resistivity, magnetic conductivity according to device and rolled piece and work,
One is set up containing air in interior ANSYS finite element analysis models；
Step 2, influence during according to pulse current assistant metal plastic forming to rolled piece material property, with reference to being obtained
To the performance of rolled piece material derive rolling when the distribution i.e. expected results of pulse current profile of the pulse current in rolled piece；
Step 3, it is preliminary on step one gained FEM model that side is set according to the expected results of pulse current profile
Boundary's condition and excitation, tentatively result of calculation is obtained by solving；
Step 4, resulting result of calculation is contrasted with the expected results of pulse current profile, according to contrast
Result and the size of difference regulation and optimization excitation, recalculate and obtain an optimum results；
Step 5, is repeated to do step 4, so that distribution of the pulse current in rolled piece is close with resulting optimum results
Expected results obtained by step 2, until obtaining an optimal boundary conditions and optimal excitation, resulting Optimum Excitation is just
It is the pulse current parameter and control electric current parameter of setting required for this rolling；
Step 6, the pulse current parameter and control electric current parameter of setting, the applying mode of pulse current are applied to device
It is that the both sides electric brush slip ring 4 of topping roll 2 is connected with the positive pole of the pulse power, the both sides electric brush slip ring 4 of bottom roll 5 and the pulse power
Negative pole is connected, and the electric brush slip ring 4 from the two end axles of topping roll 2 is introduced rolled piece by pulse current, from the two end axles of bottom roll 5
Electric brush slip ring 4 draw, the applying mode of control electric current is, dc source accesses the coil 8 inside former and later two feedings set 6
In, make the control electric current direction in two coils 8 identical, the operation of rolling is carried out afterwards, rolled piece is from two feedings in the operation of rolling
Passed through in set 6.
Above example is only that the preferred embodiment of the present invention is described, and not the scope of the present invention is carried out
Limit, on the premise of design spirit of the present invention is not departed from, those of ordinary skill in the art make to technical scheme
Various modifications and improvement, all should fall into claims of the present invention determination protection domain in.
Claims (2)
1. a kind of rolling device for preparing function-graded material, including frame, upper and lower roll, roll bearing and bearing block, upper,
Bottom roll is connected by roll bearing and bearing block with frame, it is characterised in that covered respectively on the upper and lower roll both sides spindle nose
An electric brush slip ring is filled, the electric brush slip ring is fixed on corresponding bearing block, the roll bearing is slided with bearing block and brush
Insulation is equipped between ring and bearing block, the upper and lower roll crevice place of both sides is arranged with feeding set, feeding before and after the frame
Set is bolted in frame, and the feeding set is internal to be embedded with coil, and coil is encapsulated in feeding set by upper and lower end cap
Interior, in the operation of rolling, by pulse current, electric brush slip ring from the spindle nose of topping roll both sides imports rolled piece respectively, and from bottom roll two
Electric brush slip ring on the spindle nose of end is derived, while controllable magnetic field is produced by controllable current is passed through in the coil in two feeding sets, can
Control magnetic field causes that pulse current is presented gradient and is distributed in rolled piece plastically deforming area, so that rolled piece performance distribution gradient.
2. it is a kind of implement claim 1 device method, it is characterised in that comprise the following steps that：
The drafts of rolled piece, sets up when step one, geometric parameter, resistivity, magnetic conductivity according to device and rolled piece and work
One containing air in interior ANSYS finite element analysis models；
Step 2, influence during according to pulse current assistant metal plastic forming to rolled piece material property, with reference to what is obtained
The expected results of distribution of the pulse current in rolled piece, i.e. pulse current profile when the performance of rolled piece material derives rolling；
Step 3, it is preliminary on step one gained finite element analysis model that side is set according to the expected results of pulse current profile
Boundary's condition and excitation, tentatively result of calculation is obtained by solving；
Step 4, resulting result of calculation is contrasted with the expected results of pulse current profile, according to the result of contrast
The size of excitation is adjusted and optimized with difference, recalculates and obtain an optimum results；
Step 5, is repeated to do step 4 with resulting optimum results, so that distribution of the pulse current in rolled piece is close to step
Expected results obtained by two, until obtaining an optimal boundary conditions and optimal excitation, resulting Optimum Excitation is exactly this
The pulse current parameter and control electric current parameter of setting required for secondary rolling；
Step 6, the pulse current parameter and control electric current parameter of setting are applied to device, and the applying mode of pulse current is, on
Roll both sides electric brush slip ring is connected with the positive pole of the pulse power, and bottom roll both sides electric brush slip ring is connected with the negative pole of the pulse power,
Electric brush slip ring from the two end axles of topping roll is introduced rolled piece by pulse current, and the electric brush slip ring from the two end axles of bottom roll draws
Go out, the applying mode of control electric current is, dc source is accessed in the coil inside former and later two feedings set, in making two coils
Control electric current direction is identical, and the operation of rolling is carried out afterwards, and rolled piece is passed through from two feeding sets in the operation of rolling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710248009.8A CN106914489B (en) | 2017-04-17 | 2017-04-17 | A kind of rolling device and method preparing function-graded material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710248009.8A CN106914489B (en) | 2017-04-17 | 2017-04-17 | A kind of rolling device and method preparing function-graded material |
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| Publication Number | Publication Date |
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| CN106914489A true CN106914489A (en) | 2017-07-04 |
| CN106914489B CN106914489B (en) | 2018-07-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109433823A (en) * | 2018-11-08 | 2019-03-08 | 燕山大学 | A kind of rolling device and method based on Hall effect preparation functionally graded material |
| CN109676232A (en) * | 2019-01-04 | 2019-04-26 | 武汉科技大学 | A kind of electricity auxiliary stainless steel and carbon steel Compound Machining experimental facilities and processing method |
| CN112238146A (en) * | 2020-09-25 | 2021-01-19 | 燕山大学 | Device and method for rolling thick metal plate strip with assistance of pulse current |
| CN113560670A (en) * | 2021-07-28 | 2021-10-29 | 燕山大学 | Electricity-assisted double-face-to-face plate grinding device |
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| JPH08192211A (en) * | 1995-01-12 | 1996-07-30 | Sumitomo Metal Ind Ltd | Manufacture of thick treated steel plate |
| US20040237283A1 (en) * | 2001-08-19 | 2004-12-02 | Herman Branover | Continuous casting of metal sheets and bands |
| CN102172620A (en) * | 2011-02-09 | 2011-09-07 | 清华大学深圳研究生院 | Method and system for rolling difficult-to-machine metal material by combining electro-plasticity with temperature plasticity |
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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 |
| CN106269874A (en) * | 2016-10-26 | 2017-01-04 | 燕山大学 | A kind of electro plasticity cross wedge rolling machine |
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| JPH08192211A (en) * | 1995-01-12 | 1996-07-30 | Sumitomo Metal Ind Ltd | Manufacture of thick treated steel plate |
| US20040237283A1 (en) * | 2001-08-19 | 2004-12-02 | Herman Branover | Continuous casting of metal sheets and bands |
| CN102172620A (en) * | 2011-02-09 | 2011-09-07 | 清华大学深圳研究生院 | Method and system for rolling difficult-to-machine metal material by combining electro-plasticity with temperature plasticity |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109433823A (en) * | 2018-11-08 | 2019-03-08 | 燕山大学 | A kind of rolling device and method based on Hall effect preparation functionally graded material |
| CN109676232A (en) * | 2019-01-04 | 2019-04-26 | 武汉科技大学 | A kind of electricity auxiliary stainless steel and carbon steel Compound Machining experimental facilities and processing method |
| CN109676232B (en) * | 2019-01-04 | 2024-04-30 | 武汉科技大学 | Electric auxiliary stainless steel carbon steel composite processing experimental equipment and processing method |
| CN112238146A (en) * | 2020-09-25 | 2021-01-19 | 燕山大学 | Device and method for rolling thick metal plate strip with assistance of pulse current |
| CN112238146B (en) * | 2020-09-25 | 2022-02-25 | 燕山大学 | Device and method for rolling thick metal plate strip with assistance of pulse current |
| CN113560670A (en) * | 2021-07-28 | 2021-10-29 | 燕山大学 | Electricity-assisted double-face-to-face plate grinding device |
| CN113560670B (en) * | 2021-07-28 | 2023-03-10 | 燕山大学 | Electricity-assisted double-face plate grinding device |
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| Publication number | Publication date |
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| CN106914489B (en) | 2018-07-13 |
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Effective date of registration: 20200714 Address after: 215427, Jiangsu City, Suzhou province Taicang Jing Jing Town Yongle Village Patentee after: JIANGSU RUNFU MECHANICAL ROLL MANUFACTURING Co.,Ltd. Address before: Hebei Street West Harbor area, 066004 Hebei city of Qinhuangdao province No. 438 Patentee before: Yanshan University |
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