CN102284739A - Processing method of tubular products by chipless cutting and cutting device thereof - Google Patents
Processing method of tubular products by chipless cutting and cutting device thereof Download PDFInfo
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- CN102284739A CN102284739A CN2010101416891A CN201010141689A CN102284739A CN 102284739 A CN102284739 A CN 102284739A CN 2010101416891 A CN2010101416891 A CN 2010101416891A CN 201010141689 A CN201010141689 A CN 201010141689A CN 102284739 A CN102284739 A CN 102284739A
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Abstract
The invention provides a cutting device of tubular products of steel pipes by chipless baiting and a processing method thereof, in particular to a processing method of tubular products of rolling bearing rings by the chipless baiting. The method provided by the invention is used for cutting the tubular products into tube blanks with the same length; when the tubular products are cut, a supporting device is firstly used for supporting the tubular products between upper scissors and lower scissors; then the upper scissors downward move toward a lower pressing block by the action of pressure and the lower pressing block synchronously moves in the moving direction of the upper scissors in the same moving speed, so that the upper scissors and the lower scissors move in the way of staggering; finally, the tubular products are cut off without chips. By utilizing the cutting device provided by the invention, the tubular product material is saved and the discharging of carbon is reduced at the same time; the earth environment is protected and the work efficiency is greatly improved.
Description
Technical field
The present invention relates to steel pipe pipe no-chip baiting processing method and the shear that is used for this chipless blanking, especially relate to rolling bearing lasso pipe no-chip baiting processing method and shear, it goes for the tubing blank blanking of the bearing ring of different size, and is applicable to the chipless blanking of circular non-ferrous metal tubing and other metal pipe material.
Background technology
During existing bearing was produced, the production overwhelming majority of the inside and outside lasso of bearing all adopted tubing manufacturing, and what its processing method was used is that car cuts off and the disconnected two kinds of cutting modes of milling:
In the car cut-out mode: adopt the cut-out of car cutting knife at the enterprising line pipe material of lathe, higher because of the headstock rotating speed, smear metal is rectangular continuous shape, therefore add man-hour workman's condition of work abominable, labour intensity is big, and the accident that is hurt by the strip iron filings is arranged often.
In the disconnected mode of milling, the operating type that adopts multitool to cut simultaneously with the saw blade milling cutter cuts off tubing, because the operation principle of milling cutter is the intermittent disconnection mode, so the situation of having avoided iron filings to hurt sb.'s feelings, safety production condition is improved, and labor strength improves.But it cuts off the use cost height of comparing, situation that operating efficiency is on the low side with car.
All there are the following problems for two kinds of processing methods on it, owing to have the existence of cutter entity, adding man-hour in the cut-out of tubing will inevitably a part of metal material of loss, makes it become iron filings, is a kind of great waste to metal material like this; And the cutter loss also is bigger, make that like this production cost is higher, and workman's working environment is relatively poor.
Summary of the invention
The invention provides a kind of processing method of brand-new bearing ring, the mode that adopts chipless to shear reaches the purpose of bearing ferrule blanks steel pipe tubing blanking, and can satisfy each technology essential factor of the subsequent handling of bearing ring.
For achieving the above object, on ordinary press, do suitably relevant the improvement, be implemented on the forcing press accurate-shearing thereby be equipped with related device to the tubing of bearing ferrule blanks.The invention provides a kind of pipe no-chip and shear processing method, described tubing is sheared processing by cutting mechanism, and this cutting mechanism comprises: bracing or strutting arrangement is used to support described tubing; Shear, comprise scissors, go up compact heap, lower scissors and following compact heap, lower scissors is fixed on the work top, last scissors and following compact heap are oppositely arranged, last compact heap and lower scissors are oppositely arranged, last scissors and last compact heap are positioned at an end of described pipe diameter direction, and lower scissors and following compact heap are positioned at the other end of described pipe diameter direction, and last scissors and lower scissors have less clearance at the tubing centerline direction; This shear is used for described tubing is cut into the identical pipe of length; Described method comprises: the support fixation step is supported on tubing between scissors and the lower scissors by bracing or strutting arrangement; Shear step, last scissors under pressure downwards compact heap move, descend simultaneously compact heap on moving direction at last scissors with the same moved further of identical translational speed, and then it is mobile to realize going up interlocking of scissors, lower scissors, pipe no-chip cuts off the most at last, forms pipe; Material returned step will be sheared the pipe taking-up that step forms; Transfer step, the tubing after shearing is transplanted between scissors and the lower scissors; Repeat the support fixation step, shear step and material returned step, described tubing is cut off once more to form new pipe.
Preferably, described gap is 0.01-0.03mm.
Preferably, described bracing or strutting arrangement comprises first bracing or strutting arrangement and second bracing or strutting arrangement, in the support fixation step, first bracing or strutting arrangement stretches into and is supported on the pipe internal diameter from a side opening of tubing, and between last compact heap and lower scissors, second bracing or strutting arrangement stretches into and is supported on the internal diameter of tubing from the opposite side opening of tubing, and between last scissors and following compact heap.
Preferably, last scissors is fixed on the slide block of forcing press, and described work top is the work top of forcing press simultaneously, in shearing step, by moving of scissors in the mobile realization of press ram.
Preferably, described pipe is the rolling bearing lasso.
In addition, the present invention also provides a kind of shear, and it is used to realize pipe no-chip shearing processing, and comprising: bracing or strutting arrangement is used to support described tubing; Shear, comprise scissors, go up compact heap, lower scissors and following compact heap, lower scissors is fixed on the work top, last scissors and following compact heap are oppositely arranged, last compact heap and lower scissors are oppositely arranged, last scissors and last compact heap are positioned at an end of described pipe diameter direction, and lower scissors and following compact heap are positioned at the other end of described pipe diameter direction, and last scissors and lower scissors have less clearance at the tubing centerline direction; This shear is used for described tubing is cut into the identical pipe of length; Last scissors is when downwards compact heap moves under pressure, and following compact heap with the same moved further of identical translational speed, and then is realized going up the staggered of scissors, lower scissors and moved on the moving direction at last scissors, and pipe no-chip cuts off the most at last, the formation pipe.
Preferably, described gap is 0.02-0.03mm.
Preferably, described work top is the work top of forcing press, this device also comprises upper die and lower die, patrix is fixed on the slide block of forcing press, last scissors and last compact heap are installed on the patrix, and counterdie is fixed on the above-mentioned work top, and lower scissors and following compact heap are installed on the counterdie, when shearing tubing staggered the moving of last scissors and lower scissors, last compact heap moves with respect to the patrix edge direction opposite with last scissors moving direction.
Preferably, described bracing or strutting arrangement comprises first bracing or strutting arrangement and second bracing or strutting arrangement, first bracing or strutting arrangement stretches into and is supported on the pipe internal diameter from a side opening of tubing, and between last compact heap and fixed blade, second bracing or strutting arrangement stretches into and is supported on the internal diameter of tubing from the opposite side opening of tubing, and between last scissors and following compact heap.
Preferably, described pipe is the rolling bearing lasso.
Preferably, described gap is 0.01-0.03mm.
Compare with conventional art, the beneficial effect that the present invention brought is:
1, according to the width requirement of different size with different parts, can save about metal pipe material 10%～15%/ton, reduced the discharging of carbon significantly.
2, improved workman's work production environment, strengthened safety in production and ensured.
3, about three times of operating efficiencies have been improved.
4, reduced the part production cost.
5, solved industry bottleneck operation.
Description of drawings
The counterdie assembly assumption diagram of Fig. 1 shear
The upper die component structure chart of Fig. 2 shear
The upper die component of Fig. 3 shear, counterdie component assembling structure chart
The pipe shearing partial enlarged view of Fig. 4 shear
Fig. 5 discharging device structure chart
Fig. 6 lower platen elastic connection structure figure
Scissors, lower scissors, the quiet interior inner supporting structure figure that supports, moves on Fig. 7
Compact heap on Fig. 8, compress block structural diagram down
Fig. 9 has the structure chart of the forcing press of shear
The specific embodiment
The application's shear comprises upper die component, following membrane module and electric control gear, and it is by the relative staggered cutting of shearing realization tubing of last scissors and lower scissors.Last scissors is installed in the upper die component, and lower scissors is installed in down in the membrane module; In conjunction with Fig. 9, following membrane module is fixedly mounted on the press bench face, and upper die component is fixedly mounted on the slide block of forcing press.
Structure chart for following membrane module and upper die component illustrated in figures 1 and 2.
Below in conjunction with Fig. 1, Fig. 5 and Fig. 6 following membrane module is described:
Among Fig. 1, following membrane module comprises part of the lower die and feeding part.Counterdie partly comprises lower bolster 1-7, lower bolster 1-6, counterdie fixed head 1-23, and lower bolster 1-7, lower bolster 1-6 and counterdie fixed head 1-23 are assembled into one with fixed blade 9, following compact heap 11.
In conjunction with lower bolster 1-7, lower bolster 1-6 and the overlapping setting of counterdie fixed head 1-23, pressing plate 1-10 is installed in the above-mentioned overlay structure by following elastic mechanism, pressing plate 1-10 contacts with following compact heap 1-11 rigidity, and the pressing plate 1-10 rigidity extruding compact heap 1-11 down that makes progress, simultaneously, pressing plate 1-10 can move down under pressure.Referring to Fig. 6, pressure reaches depression bar by pressing plate 1-10, reaches bullet pad pressing plate again, is become absorbability and is stored by polyamine fat bullet pulvilliform, makes down compact heap 1-11 return back to initial position under the elastic force effect after waiting to shed external applied load.
In conjunction with Fig. 5, be installed with discharging device on the float plate 1-15, a plurality of through holes are set on the float plate 1-15, the lower end of a plurality of float plate guide pillar 1-13 is fixedly mounted on the lower bolster 1-6, and the through hole of float plate 1-15 is passed in the upper end; Be provided with bullet pad 1-14 between float plate 1-15 and the lower bolster 1-6.The upwards range of float plate limited block 1-17 restriction float plate 1-15.Float plate bullet pad 1-14 provides upwards elastic force for float plate 1-15, and can be compressed under pressure, thereby makes float plate 1-15 to move at restriceted envelope.
The tubing supporting mechanism comprises quiet interior 1-12 of support and moving interior support 1-22.Support 1-12 in quiet and fixedly connected with quiet inner bracing piece 1-2 screw thread, quiet inner bracing piece 1-2 is connected to quiet interior the support on the cylinder 1-1; Support in quiet under the effect of cylinder, quiet inner bracing piece 1-2 and the quiet interior 1-12 that supports penetrate in the tubing, and support 1-12 is fixed on tubing on lower scissors 1-9 and the following compact heap 1-11 in quiet, and the quiet interior right side of supporting 1-12 flushes with the right side of lower scissors.
Refer again to Fig. 5, material returned support 1-19 and material returned cylinder 1-16 all are fixedly mounted on the float plate 1-15, the end of material returned bar 1-18 is connected with moving internal support 1-22, the other end of material returned bar 1-18 is connected with material returned cylinder 1-16, support in moving 1-22 from the right-hand member of tubing penetrate tubing and be supported on the tubing being sheared under partly, material returning sleeve 1-20 is installed on the material returned support with screw, limited block 1-21 installs on the moving internal support, limited block 1-21 when the endoporus of pipe moves fits with following compact heap 1-11 when moving internal support, defines the interior hole site of moving internal support to pipe.When moving internal support counter motion, cut pipe servo-actuated internal support together moves, and is taking off on the driven internal support of pipe under material returning sleeve hinders, with the compressed air workspace of blowing off.In the reciprocating motion of material returned cylinder, realize the supporting and the material returned to tubing.
Material feed clamping cylinder 1-3 will manage the tight and feeding of feed collet, and pre-determined bit piece 1-8 will treat Pipe Cutting material pre-determined bit, and tubing be imported in the semicircle of fixed blade and following compact heap and wait to cut off.
Following membrane module also has a plurality of guide pillar 1-4, and guide pillar 1-4 is used for installing and fixing with upper die component.Spring 5 is used for resetting of upper die component ball cover, has catch 1-24 on the guide pillar, is used to limit the maximum upward position of upper die component ball cover together.
Below in conjunction with Fig. 2 upper die component is described:
Among Fig. 2, upper die component comprises cope match-plate pattern 2-5, upper padding plate 2-17, upper mould fixed plate 2-6 and liner plate 1-18, and cope match-plate pattern 2-5, upper padding plate 2-17, upper mould fixed plate 2-6 and liner plate 1-18 will go up scissors 9, last compact heap 2-10 and pressing plate 2-11 and be combined into one.
Cope match-plate pattern 2-5, upper padding plate 2-17 and the overlapping setting of upper mould fixed plate 2-6, pressing plate 2-10 is installed in the above-mentioned overlay structure by last elastic mechanism, pressing plate 2-11 contacts with last compact heap 2-10 rigidity, and the downward rigidity extruding of pressing plate 2-11 is compact heap down, simultaneously, pressing plate 2-11 can move up under pressure.Power is passed to pressing plate 2-1, and it is up that pressing plate continues, and the stressed compression of polyamine fat bullet pad this moment stores energy in order to slide block when up compact heap 2-10 is resetted.
Depression bar 2-7 is fixedly mounted on the upper mould fixed plate 2-6, and depression bar 2-7 is connected to down on the float plate 1-15 of membrane module, and when upper die component moved downward, under the pressure effect of depression bar 2-7, float plate 1-15 followed upper die component and moves downward synchronously.
Upper die component has the guide pin bushing 2-15 with the corresponding setting of following membrane module guide pillar 1-4, is provided with ball cover 2-16 in the guide pin bushing 2-15, and guide pin bushing 2-15 cooperates with the guide pillar 1-4 of following membrane module upper die component and following membrane module are installed as one.
It is synthetic that last pretension piece and lower scissors head are respectively two semicircles, entangles tube outer diameter just after it is synthetic.And two part top plan leave gap 0.02-0.04mm.
It is synthetic that last scissors and following pretension build portion are respectively two semicircles, and it entangles tube outer diameter after synthesizing just.And two part top plan leave gap 0.02-0.04mm.
In conjunction with Fig. 2,9, the slide block 2-2 of forcing press is after transforming, the slide block connecting plate 2-3 that to fixedly connected with slide block 2-2 is installed on the upper die component with bolt 2-4, to descend membrane module to be installed on the work top of forcing press simultaneously, upper die component is connected with guide pin bushing 2-15 by guide pillar 1-4 with following membrane module, thereby finishes installing and fixing of shear.
After above-mentioned installation, last scissors and following compact heap are oppositely arranged, last compact heap and lower scissors are oppositely arranged, last scissors and last compact heap are positioned at an end of described pipe diameter direction, lower scissors and following compact heap are positioned at the other end of described pipe diameter direction, and last scissors and lower scissors have less clearance at the tubing centerline direction; This gap is 0.01-0.04mm, is preferably 0.01-0.03mm.
Automatically controlled part realizes the control to each cylinder and forcing press job order.
Said apparatus can be realized the chipless cutting of tubing.
Below the job order that is installed in the shear on the forcing press is described:
In conjunction with Fig. 3,4 and 9, pipe is expected to deliver to station to be processed by after cylinder 1-1, the cylinder 1-16 support by cylinder 1-3.Be about to the pipe material and deliver between scissors and the lower scissors, starting pressure machine slide block down, under the effect of lathe pressure, last scissors and lower scissors are interlaced, and depression bar is pushed down float plate simultaneously, and is also simultaneously descending along float plate guide pillar guiding under lathe pressure.At this moment, the counter motion under lower scissors hinders of last compact heap to keep the pressure to tubing, makes it can not displacement by pressing plate 2-11, power transmission push rod 2-8, backing plate 2-1, compression pressure bullet pad 2-19.Over against going up scissors, last compact heap is at this moment over against answering lower scissors at this moment for following compact heap, and the starting pressure machine makes slide block down, and this moment, last scissors moved down the pipe that is enclosed within down in the compact heap synchronously with slide block down under pressure.Last compact heap moves with last scissors synchronous backward under the lower scissors active force this moment.At this moment, upper and lower scissors is staggered with tubing and pipe cutting and separating.Be installed in parts on the float plate such as material returned cylinder 1-16, material returned support 1-19 with float plate downward movement simultaneously.Because lathe pressure is much larger than the pressure of upper and lower compact heap and bullet pad at this moment, so staggered cutting realizes the cut-out of tubing between last scissors and the lower scissors.Preferably, last scissors is moved downward to the stroke of 1/3 pipe diameter, tubing can be cut down.
When the up pressure that sheds of the slide block 2-2 of forcing press, last compact heap 2-10, with last pretension piece 2-12, down compact heap 1-11, float plate 1-15 recover initial position respectively under the effect of polyamine fat bullet pad, the cylinder of the material returned simultaneously begins counter motion pulling material returned bar, moving internal support, under the obstruction of material returning sleeve 1-20, finish and will separate on the driven internal support of the blank that cut down, and with the compressed air workspace of blowing off.Simultaneously, the also counter motion of quiet internal support cylinder, with quiet internal support also counter motion to next original position, the clamping feeding cylinder is also finished pine, and folder-clamping---the initial position that tubing cuts is got back in the action of feeding, so far a course of work terminates, and repetitive cycling realizes producing in enormous quantities according to this.
Above-mentioned tubing to be cut is preferably pipe, and the blank under the above-mentioned cutting is preferably as the rolling bearing lasso.
The aforementioned tubes cutting equipment can be realized the production in enormous quantities of bearing ring, in economical with materials, has improved operating efficiency greatly.Reduce the discharging of carbon, protected earth environment.
Claims (10)
1. a pipe no-chip is sheared processing method, and described tubing is sheared processing by cutting mechanism, and this cutting mechanism comprises:
Bracing or strutting arrangement is used to support described tubing;
Shear, comprise scissors, go up compact heap, lower scissors and following compact heap, lower scissors is installed in counterdie and partly is fixed on the work top, last scissors and following compact heap are oppositely arranged, last compact heap and lower scissors are oppositely arranged, last scissors and last compact heap are positioned at an end of described pipe diameter direction, and lower scissors and following compact heap are positioned at the other end of described pipe diameter direction, and last scissors and lower scissors have less clearance at the tubing centerline direction;
This shear is used for described tubing is cut into the identical pipe of length;
Described method comprises:
The support fixation step is supported on tubing between scissors and the lower scissors by bracing or strutting arrangement;
Shear step, last scissors under pressure downwards compact heap move, descend simultaneously compact heap on moving direction at last scissors with the same moved further of identical translational speed, and then it is mobile to realize going up interlocking of scissors, lower scissors, pipe no-chip cuts off the most at last, forms pipe;
Material returned step will be sheared the pipe taking-up that step forms;
Transfer step, the tubing after shearing is transplanted between scissors and the lower scissors;
Repeat the support fixation step, shear step and material returned step, described tubing is cut off once more to form new pipe.
2. method according to claim 1 is characterized in that:
Described gap is 0.01-0.03mm.
3. method according to claim 1 and 2 is characterized in that:
Described bracing or strutting arrangement comprises first bracing or strutting arrangement and second bracing or strutting arrangement, in the support fixation step, first bracing or strutting arrangement stretches into and is supported on the pipe internal diameter from a side opening of tubing, and between last compact heap and fixed blade, second bracing or strutting arrangement stretches into and is supported on the internal diameter of tubing from the opposite side opening of tubing, and between last scissors and following compact heap.
4. according to each described method in the claim 1 to 3, it is characterized in that:
Last scissors is fixed on the slide block of forcing press, and described work top is the work top of forcing press simultaneously, in shearing step, by moving of scissors in the mobile realization of press ram.
5. according to each described method in the claim 1 to 4, it is characterized in that:
Described pipe is the rolling bearing lasso.
6. shear, it is used to realize that pipe no-chip shears processing, comprising:
Bracing or strutting arrangement is used to support described tubing;
Shear, comprise scissors, go up compact heap, lower scissors and following compact heap, lower scissors is fixed on the work top, last scissors and following compact heap are oppositely arranged, last compact heap and lower scissors are oppositely arranged, last scissors and last compact heap are positioned at an end of described pipe diameter direction, and lower scissors and following compact heap are positioned at the other end of described pipe diameter direction, and last scissors and lower scissors have less clearance at the tubing centerline direction;
This shear is used for described tubing is cut into the identical pipe of length;
Last scissors is when downwards compact heap moves under pressure, and following compact heap with the same moved further of identical translational speed, and then is realized going up the staggered of scissors, lower scissors and moved on the moving direction at last scissors, and pipe no-chip cuts off the most at last, the formation pipe.
7. device according to claim 6 is characterized in that:
Described gap is 0.01-0.04mm.
8. according to claim 6 or 7 described devices, it is characterized in that:
Described work top is the work top of forcing press, this device also comprises upper die and lower die, patrix is fixed on the slide block of forcing press, last scissors and last compact heap are installed on the patrix, counterdie is fixed on the above-mentioned work top, lower scissors and following compact heap are installed on the counterdie, last scissors and staggered the moving of lower scissors and during shearing tubing, last compact heap moves with respect to the patrix edge direction opposite with last scissors moving direction.
9. according to each described device in the claim 6 to 8, it is characterized in that:
Described bracing or strutting arrangement comprises first bracing or strutting arrangement and second bracing or strutting arrangement, first bracing or strutting arrangement stretches into and is supported on the pipe internal diameter from a side opening of tubing, and between last compact heap and lower scissors, second bracing or strutting arrangement stretches into and is supported on the internal diameter of tubing from the opposite side opening of tubing, and between last scissors and following compact heap.
10. according to each described device in the claim 6 to 9, it is characterized in that:
Described pipe is the rolling bearing lasso.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010141689 CN102284739B (en) | 2010-06-19 | 2010-06-19 | Processing method of tubular products by chipless cutting and cutting device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010141689 CN102284739B (en) | 2010-06-19 | 2010-06-19 | Processing method of tubular products by chipless cutting and cutting device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102284739A true CN102284739A (en) | 2011-12-21 |
| CN102284739B CN102284739B (en) | 2013-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010141689 Expired - Fee Related CN102284739B (en) | 2010-06-19 | 2010-06-19 | Processing method of tubular products by chipless cutting and cutting device thereof |
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| Country | Link |
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| CN (1) | CN102284739B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106346534A (en) * | 2016-11-08 | 2017-01-25 | 无锡宏益塑胶机械有限公司 | Chipless cutting machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4540046A (en) * | 1983-09-13 | 1985-09-10 | Nl Industries, Inc. | Shear ram apparatus |
| CN87216633U (en) * | 1987-12-03 | 1988-11-02 | 黑山县钢管厂 | Press-in type chipless cyclonic pipe cutter |
| JP2002210610A (en) * | 2001-01-16 | 2002-07-30 | Calsonic Kansei Corp | Pipe cutting device |
| CN2678811Y (en) * | 2004-03-12 | 2005-02-16 | 张有龙 | Blanking machine of metal steel pipe |
| CN201201072Y (en) * | 2008-06-02 | 2009-03-04 | 孙树才 | Chipless disconnecting means for steel pipe workpieces |
-
2010
- 2010-06-19 CN CN 201010141689 patent/CN102284739B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4540046A (en) * | 1983-09-13 | 1985-09-10 | Nl Industries, Inc. | Shear ram apparatus |
| CN87216633U (en) * | 1987-12-03 | 1988-11-02 | 黑山县钢管厂 | Press-in type chipless cyclonic pipe cutter |
| JP2002210610A (en) * | 2001-01-16 | 2002-07-30 | Calsonic Kansei Corp | Pipe cutting device |
| CN2678811Y (en) * | 2004-03-12 | 2005-02-16 | 张有龙 | Blanking machine of metal steel pipe |
| CN201201072Y (en) * | 2008-06-02 | 2009-03-04 | 孙树才 | Chipless disconnecting means for steel pipe workpieces |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106346534A (en) * | 2016-11-08 | 2017-01-25 | 无锡宏益塑胶机械有限公司 | Chipless cutting machine |
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| Publication number | Publication date |
|---|---|
| CN102284739B (en) | 2013-04-17 |
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