CN102998172A - Sheet clamp of plastic sheet tensile testing machine - Google Patents
Sheet clamp of plastic sheet tensile testing machine Download PDFInfo
- Publication number
- CN102998172A CN102998172A CN2012105819829A CN201210581982A CN102998172A CN 102998172 A CN102998172 A CN 102998172A CN 2012105819829 A CN2012105819829 A CN 2012105819829A CN 201210581982 A CN201210581982 A CN 201210581982A CN 102998172 A CN102998172 A CN 102998172A
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- compressing tablet
- tablet bar
- clamping plate
- plastic sheet
- bar
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Abstract
The invention relates to a sheet clamp of a plastic sheet tensile testing machine, which comprises a clamp body and a horizontal clamping plate, wherein the horizontal clamping plate is fixed inside the clamp body; the sheet clamp is characterized in that the sheet clamp further comprises a sheeting rod and a sheeting rod position switching cylinder capable of driving the sheeting rod to swing back and forth; the sheeting rod position switching cylinder is arranged on the clamp body; the sheeting rod is rotatably arranged on the clamp body; the rotating shaft of the sheeting rod is parallel to the upper surface of the horizontal clamping plate; the upper part of the sheeting rod is matched with the piston rod of the sheeting rod position switching cylinder; the lower end of the sheeting rod is provided with a rotating stop part; the distance between each point on the lower end surface of the rotating stop part and the rotating shaft of the sheeting rod is larger than the distance between the rotating shaft of the sheeting rod and the upper surface of the horizontal clamping plate; the rotating stop part is positioned above the horizontal clamping plate; and the rotating stop part is positioned outside the rotating shaft of the sheeting rod. The sheet clamp of the plastic sheet tensile testing machine is simple and compact in structure, and the edge of a plastic sheet can be reliably clamped in the process of stretching the plastic sheet.
Description
Technical field
The present invention relates to plastic sheet to be drawn into the plastic sheet cupping machine of plastic sheeting, specifically, relate to a kind of sheet material anchor clamps for the plastic sheet cupping machine.
Background technology
When developing new plastic sheeting product, must check composition of raw materials whether accurate.In order to save the raw material consumption in the performance history, reducing development cost, at present, plastic sheeting manufacturer and research and development institution extensively adopt the plastic sheet cupping machine to test, be equipped with a small amount of raw material according to the new raw material prescription, make certain thickness plastic sheet (or claiming the thick film sheet), then on the plastic sheet cupping machine, plastic sheet is drawn into plastic sheeting, whether whether the physical property, mechanical property etc. of then testing plastic sheeting meet the requirements, accurate with the check composition of raw materials.
Drawing mechanism is one of key component in the plastic sheet cupping machine, the drawing mechanism of the biaxial tensile test machine of Chinese utility model patent instructions CN2835987 bulletin, it is simple in structure, move comparatively reliable, under the cooperation of other mechanism of biaxial tensile test machine, can accurately finish the stretched operation of different multiples, plastic sheet is drawn into the plastic sheeting of even thickness, for the performance of plastic film test provides superior in quality sample, guarantee the accuracy of testing, for the exploitation of Novel plastic-film product provides great help.This drawing mechanism comprises two pairs of guide rails and driven unit thereof, four groups of anchor clamps and driven unit thereof.During use, to be installed on the drawing mechanism by suitable rectangle (being preferably square) plastic sheet by the thickness that new prescription is made, namely the rectangular plastic sheet material is placed between four groups of anchor clamps, and makes the respectively edge, four limits of clamp rectangular plastic sheet of four groups of anchor clamps; The biaxial tensile test machine is heated to suitable temperature with plastic sheet; Then it is opposing to translation to be driven into right guide rail by the guide rail driven unit, and by the anchor clamps driven unit, make that the distance between each anchor clamps increases gradually in the anchor clamps on the same group, and remain that anchor clamps evenly arrange, finish the stretching of plastic sheet, plastic sheet is drawn into the plastic sheeting of reservation shape and size.Wherein, the preferred air-actuated jaw of anchor clamps, all air-actuated jaws are controlled by same compressed air source, keep strokes.
In the existing drawing mechanism, the anchor clamps (being the sheet material anchor clamps) that are used for clamping plastic sheet edge comprise clamp body, intermediate plate cylinder, lower plate and train wheel bridge; Lower plate is fixed at the inboard (clamp body was near a side of plastic sheet when the inboard of clamp body referred to use) of clamp body, and lower plate can be made one with clamp body or be fixedly connected with clamp body by web member; The cylinder body of intermediate plate cylinder is fixedly mounted on the clamp body, and the piston rod of intermediate plate cylinder is down, and train wheel bridge is fixedly mounted on the piston rod of intermediate plate cylinder, train wheel bridge be in lower plate directly over.When the piston rod of intermediate plate cylinder stretched out, the driving train wheel bridge descended and jointly the edge of plastic sheet is clamped with lower plate.Yet, in the process of stretched plastic sheet material, the situation that anchor clamps and plastic sheet edge be separated (be commonly referred to and take off the folder phenomenon) can occur, its reason is that the friction force between anchor clamps and the plastic sheet is too small, so that occurs skidding between anchor clamps and the plastic sheet edge and be separated.In order to address the above problem, can improve the compressed-air actuated air pressure that drives the intermediate plate cylinder, and/or adopt the larger intermediate plate cylinder of piston area, increasing the power output of intermediate plate cylinder, be applied to pressure on the train wheel bridge thereby increase the intermediate plate cylinder.But the tolerance air pressure of intermediate plate cylinder is limited, and in order to ensure safety, the compressed-air actuated air pressure that drives the intermediate plate cylinder can only be controlled within limits, and the power output of intermediate plate cylinder is restricted; And increase the piston rod area of intermediate plate cylinder, must increase the volume of intermediate plate cylinder, take larger space so that in the drawing mechanism on the same group anchor clamps can't fully close up, reduced draw ratio.
Summary of the invention
Technical matters to be solved by this invention provides a kind of sheet material anchor clamps of plastic sheet cupping machine, and this sheet material clamp structure is simply compact, and can be with plastic sheet edge reliable grip in the process of stretched plastic sheet material.The technical scheme that adopts is as follows:
A kind of sheet material anchor clamps of plastic sheet cupping machine, comprise clamp body and horizontal clamping plate, horizontal clamping plate are fixed at the inboard of clamp body, it is characterized in that: the compressing tablet bar position switching cylinder that described sheet material anchor clamps also comprise the compressing tablet bar and can drive compressing tablet bar reciprocally swinging, compressing tablet bar position is switched cylinder and is installed on the clamp body, the compressing tablet bar rotatably is installed on the clamp body, the rotation axis of compressing tablet bar and the upper surface of horizontal clamping plate are parallel to each other, and compressing tablet bar top cooperates with the piston rod that cylinder is switched in compressing tablet bar position; Compressing tablet bar lower end has rotation prevention portion, distance on the lower surface of described rotation prevention portion between the rotation axis of each point and compressing tablet bar is greater than the distance between the upper surface of the rotation axis of compressing tablet bar and horizontal clamping plate, rotation prevention portion is in the top of horizontal clamping plate, and rotation prevention portion is in the outside of the rotation axis of compressing tablet bar.
Among the present invention, when the inboard refers to use near a side of the plastic sheet that will stretch, when the outside refers to use away from a side of the plastic sheet that will stretch.
Above-mentioned horizontal clamping plate can be made one with clamp body, also can horizontal clamping plate be fixedly connected with clamp body by web member.
In a kind of preferred version, the cylinder body that cylinder is switched in above-mentioned compressing tablet bar position is fixedly mounted on the clamp body, compressing tablet bar top (being to be in the above part of its rotation axis on the compressing tablet bar) is provided with bar hole, the piston rod that cylinder is switched in compressing tablet bar position is provided with the first pin, and this first pin is in the described bar hole.Compressing tablet bar position is switched the common along continuous straight runs of cylinder and is fixedly mounted on the clamp body.Above-mentioned bar hole extends along the length direction on compressing tablet bar top usually.
In the another kind of preferred version, cylinder body and the clamp body of above-mentioned compressing tablet bar position switching cylinder are hinged, and piston rod and the compressing tablet bar upper end of compressing tablet bar position switching cylinder are hinged.
In a kind of concrete scheme, be fixed with axis pin base on the above-mentioned clamp body, axis pin base is in the top of horizontal clamping plate, and the compressing tablet bar rotatably is installed in (axis of alignment pin is the rotation axis of compressing tablet bar) on the axis pin base by alignment pin.In this case, the lower end of compressing tablet bar is between axis pin base and horizontal clamping plate; Consisting of between the medial extremity of axis pin base and the medial extremity of horizontal clamping plate can be for the sheet material insert port of plastic sheet edge insertion.
Preferred above-mentioned compressing tablet bar top and compressing tablet bar position switch position that the piston rod of cylinder cooperates to the distance of the rotation axis of compressing tablet bar greater than the rotation axis of the compressing tablet bar distance to compressing tablet bar lower end, like this, utilize lever principle, the requirement of compressing tablet bar position being switched the cylinder power output can be reduced, less cylinder can be selected.
The lower surface of above-mentioned compressing tablet bar cooperates with the upper surface of horizontal clamping plate, with the edge clamping of plastic sheet.In a kind of concrete scheme, above-mentioned compressing tablet bar lower end has rotation prevention portion and clamping part, clamping part is in the inboard of rotation prevention portion, distance on the lower surface of clamping part between the rotation axis of each several part and compressing tablet bar is less than the distance between the upper surface of the rotation axis of compressing tablet bar and horizontal clamping plate, this moment clamping part the lower surface and the lower surface of rotation prevention portion as with the clamping face of plastic sheet edge mate; More preferably the distance between the rotation axis of each several part and compressing tablet bar increases to the compressing tablet bar outside gradually from compressing tablet bar inboard on the lower surface of clamping part.In the another kind of concrete scheme, above-mentioned rotation prevention portion is positioned in the inner part position, compressing tablet bar lower end, this moment rotation prevention portion the lower surface as with the clamping face of plastic sheet edge mate.
When plastic sheet to be stretched is installed in preparation, the side oscillation outside clamp body of compressing tablet bar lower end, forming between the upper surface of compressing tablet bar lower end and horizontal clamping plate can be for the gap of plastic sheet edge insertion; After the plastic sheet edge inserts the gap between the upper surface of compressing tablet bar lower end and horizontal clamping plate and arrives the precalculated position, the cylinder action is switched in compressing tablet bar position, spur laterally compressing tablet bar upper end, make the side oscillation in the clamp body of compressing tablet bar lower end, compressing tablet bar lower end descends and presses to the upper surface of horizontal clamping plate, compressing tablet bar lower end applies downward pressure to the plastic sheet edge, jointly position that the plastic sheet edge is corresponding is clamped by compressing tablet bar lower end and horizontal clamping plate.Subsequently, in drawing process, plastic sheet applies acting force (this acting force is friction force) to compressing tablet bar lower end, and simultaneously compressing tablet bar position is switched the sustainable maintenance of cylinder compressing tablet bar upper end is applied laterally pulling force, makes compressing tablet bar lower end have the trend of side oscillation in the clamp body; In the process of compressing tablet bar lower end side oscillation in the clamp body, compressing tablet bar lower end increases gradually to the downward pressure that the plastic sheet edge applies, and more tightly plastic sheet is pressed to horizontal clamping plate, thereby gets the edge clamping of plastic sheet tighter.Because compressing tablet bar lower end has rotation prevention portion, when this rotation prevention portion withstands horizontal clamping plate, horizontal clamping plate can stop further inwardly swing the in compressing tablet bar lower end (to that is to say in the sheet material anchor clamps, has auto-lock function between horizontal clamping plate and the compressing tablet bar), and compressing tablet bar lower end is larger to the downward pressure that the plastic sheet edge applies, therefore the friction force between compressing tablet bar lower end and the plastic sheet edge is larger, can not occur the situation that sheet material anchor clamps and plastic sheet edge are separated in drawing process.
Among the present invention, compressing tablet bar position is switched cylinder and is played the effect of switching compressing tablet bar position, and provides original pressure for compressing tablet bar lower end when preparation stretches, and makes jointly the position clamping that the plastic sheet edge is corresponding of compressing tablet bar lower end and horizontal clamping plate; And in drawing process, rely on the plastic sheet edge that the pulling force that cylinder applies compressing tablet bar upper end is switched in acting force and compressing tablet bar position that compressing tablet bar lower end applies, drive the side oscillation in the clamp body of compressing tablet bar lower end, make compressing tablet bar lower end make compressing tablet bar lower end more tightly plastic sheet be pressed to horizontal clamping plate, compressing tablet bar lower end and horizontal clamping plate position that the plastic sheet edge is corresponding are clamped jointly.Therefore, the power output that the present invention is switched cylinder to compressing tablet bar position is less demanding, can adopt less cylinder, makes the structure of sheet material anchor clamps more simple compact.The rotation prevention portion of compressing tablet bar lower end can prevent the horizontal clamping plate of compressing tablet bar lower end disengaging in the drawing process, avoids taking off the folder phenomenon, guarantees that the sheet material anchor clamps can be with plastic sheet edge reliable grip.
Description of drawings
Fig. 1 is the structural representation of the preferred embodiment of the present invention;
Fig. 2 is the synoptic diagram of another duty of sheet material anchor clamps shown in Figure 1;
Fig. 3 is the enlarged drawing of A part among Fig. 2.
Embodiment
As shown in Figure 1-Figure 3, the sheet material anchor clamps of this plastic sheet cupping machine comprise clamp body 1, horizontal clamping plate 2, compressing tablet bar 3 and compressing tablet bar position switching cylinder 4.
In addition, compressing tablet bar 3 lower ends also can have clamping part 32, and clamping part 32 is in the inboard of rotation prevention portion 31, the distance R on the lower surface of clamping part 32 between the rotation axis 8 of each several part and compressing tablet bar 3
2Less than the distance R between the upper surface of the rotation axis 8 of compressing tablet bar 3 and horizontal clamping plate 2
0, and the distance R between the rotation axis 8 of each several part and compressing tablet bar 3 on the lower surface of clamping part 32
2Increase gradually to compressing tablet bar 3 outsides from compressing tablet bar 3 inboards.The lower surface of the lower surface of clamping part 32 and rotation prevention portion 31 as and the clamping face of plastic sheet 5 edge mate, when sheet thickness is larger the lower surface of clamping part 32 as clamping face, when sheet thickness the lower surface of hour rotation prevention portion 31 as clamping face.
Brief description is the principle of work of this sheet material anchor clamps once:
With reference to figure 1, when plastic sheet to be stretched is installed in preparation, the piston rod 42 that cylinder 4 is switched in compressing tablet bar position stretches out, and drives compressing tablet bar 3 lower ends to clamp body 1 outer side oscillation, and forming between the upper surface of compressing tablet bar 3 lower ends and horizontal clamping plate 2 can be for the gap of plastic sheet edge insertion.
Referring to figs. 2 and 3, after plastic sheet 5 edges insert the gap between the upper surface of compressing tablet bar 3 lower ends and horizontal clamping plate 2 and arrive the precalculated position, the piston rod 42 that cylinder 4 is switched in compressing tablet bar position shrinks, spur laterally compressing tablet bar 3 upper ends, make compressing tablet bar 3 lower ends to clamp body 1 interior side oscillation, compressing tablet bar 3 lower ends descend and press to the upper surface of horizontal clamping plate 2, compressing tablet bar 3 lower ends apply downward pressure to plastic sheet 5 edges, are clamped by compressing tablet bar 3 lower ends and horizontal clamping plate 2 common that plastic sheet 5 edges are corresponding positions.
Subsequently, in drawing process, 5 pairs of compressing tablet bar 3 lower ends of plastic sheet apply acting force (this acting force is friction force), and simultaneously compressing tablet bar position is switched cylinder 4 and continued to keep compressing tablet bar 3 upper ends are applied laterally pulling force, and compressing tablet bar 3 lower ends are had to the trend of clamp body 1 interior side oscillation; In the process of clamp body 1 interior side oscillation, compressing tablet bar 3 lower ends increase gradually to the downward pressure that plastic sheet 5 edges apply in compressing tablet bar 3 lower ends, more tightly plastic sheet 5 are pressed to horizontal clamping plate 2, thereby get the edge clamping of plastic sheet 5 tighter.Because compressing tablet bar 3 lower ends have rotation prevention portion 31, when withstanding horizontal clamping plate 2, this rotation prevention portion 31 (accompanies plastic sheet 5 between rotation prevention portion 31 and the horizontal clamping plate 2), horizontal clamping plate 2 can stop further inwardly swing the in compressing tablet bar 3 lower ends (to that is to say in the sheet material anchor clamps, has auto-lock function between horizontal clamping plate 2 and the compressing tablet bar 3), and compressing tablet bar 3 lower ends are larger to the downward pressure that plastic sheet 5 edges apply, make the friction force between compressing tablet bar 3 lower ends and plastic sheet 5 edges larger, thereby the situation that sheet material anchor clamps and plastic sheet edge are separated in drawing process, can not occur.
In other embodiments, cylinder body and the clamp body of compressing tablet bar position switching cylinder are hinged, and piston rod and the compressing tablet bar upper end of compressing tablet bar position switching cylinder are hinged.
In other embodiments, the rotation prevention portion on the compressing tablet bar also can be positioned in the inner part position, compressing tablet bar lower end, this moment rotation prevention portion the lower surface as with the clamping face of plastic sheet edge mate.
Claims (5)
1. the sheet material anchor clamps of a plastic sheet cupping machine, comprise clamp body and horizontal clamping plate, horizontal clamping plate are fixed at the inboard of clamp body, it is characterized in that: the compressing tablet bar position switching cylinder that described sheet material anchor clamps also comprise the compressing tablet bar and can drive compressing tablet bar reciprocally swinging, compressing tablet bar position is switched cylinder and is installed on the clamp body, the compressing tablet bar rotatably is installed on the clamp body, the rotation axis of compressing tablet bar and the upper surface of horizontal clamping plate are parallel to each other, and compressing tablet bar top cooperates with the piston rod that cylinder is switched in compressing tablet bar position; Compressing tablet bar lower end has rotation prevention portion, distance on the lower surface of described rotation prevention portion between the rotation axis of each point and compressing tablet bar is greater than the distance between the upper surface of the rotation axis of compressing tablet bar and horizontal clamping plate, rotation prevention portion is in the top of horizontal clamping plate, and rotation prevention portion is in the outside of the rotation axis of compressing tablet bar.
2. the sheet material anchor clamps of plastic sheet cupping machine according to claim 1, it is characterized in that: the cylinder body that cylinder is switched in described compressing tablet bar position is fixedly mounted on the clamp body, compressing tablet bar top is provided with bar hole, the piston rod that cylinder is switched in compressing tablet bar position is provided with the first pin, and this first pin is in the described bar hole.
3. the sheet material anchor clamps of plastic sheet cupping machine according to claim 2 is characterized in that: described bar hole extends along the length direction on compressing tablet bar top.
4. the sheet material anchor clamps of plastic sheet cupping machine according to claim 1 is characterized in that: it is hinged that cylinder body and the clamp body of cylinder switched in described compressing tablet bar position, and compressing tablet bar position is switched on the piston rod of cylinder and the compressing tablet bar hinged.
5. the sheet material anchor clamps of each described plastic sheet cupping machine according to claim 1-4, it is characterized in that: be fixed with axis pin base on the described clamp body, axis pin base is in the top of horizontal clamping plate, and the compressing tablet bar rotatably is installed on the axis pin base by alignment pin; The lower end of compressing tablet bar is between axis pin base and horizontal clamping plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210581982.9A CN102998172B (en) | 2012-12-28 | 2012-12-28 | Sheet clamp of plastic sheet tensile testing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210581982.9A CN102998172B (en) | 2012-12-28 | 2012-12-28 | Sheet clamp of plastic sheet tensile testing machine |
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| Publication Number | Publication Date |
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| CN102998172A true CN102998172A (en) | 2013-03-27 |
| CN102998172B CN102998172B (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210581982.9A Active CN102998172B (en) | 2012-12-28 | 2012-12-28 | Sheet clamp of plastic sheet tensile testing machine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849137A (en) * | 2015-05-28 | 2015-08-19 | 常州机电职业技术学院 | Cotton fiber clamping device |
| CN105460514A (en) * | 2015-12-15 | 2016-04-06 | 爱彼思（苏州）自动化科技有限公司 | Round rod transfer device |
| CN105466347A (en) * | 2015-12-15 | 2016-04-06 | 爱彼思（苏州）自动化科技有限公司 | Round bar detection device |
| CN108481714A (en) * | 2018-04-24 | 2018-09-04 | 安徽鲲鹏装备模具制造有限公司 | A kind of assistant formation has the epidermis stretching structure of depths products |
| CN113125225A (en) * | 2021-04-15 | 2021-07-16 | 扬州万润光电科技有限公司 | Device for manufacturing film standard sample with load thermal deformation |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106969974A (en) * | 2017-03-22 | 2017-07-21 | 安徽正钧信息科技有限公司 | A kind of grip device of test mechanical performance |
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| CN201324984Y (en) * | 2008-12-25 | 2009-10-14 | 浙江名媛工艺饰品有限公司 | Clamp locking mechanism |
| CN101648345A (en) * | 2008-08-15 | 2010-02-17 | 天润曲轴股份有限公司 | Pneumatic clamping device |
| CN201755740U (en) * | 2010-03-12 | 2011-03-09 | 邬烈保 | Instrument panel installation support welding jig |
| CN203053785U (en) * | 2012-12-28 | 2013-07-10 | 蔡荣华 | Sheet clamp of plastic sheet tensile testing machine |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101648345A (en) * | 2008-08-15 | 2010-02-17 | 天润曲轴股份有限公司 | Pneumatic clamping device |
| CN201324984Y (en) * | 2008-12-25 | 2009-10-14 | 浙江名媛工艺饰品有限公司 | Clamp locking mechanism |
| CN201755740U (en) * | 2010-03-12 | 2011-03-09 | 邬烈保 | Instrument panel installation support welding jig |
| CN203053785U (en) * | 2012-12-28 | 2013-07-10 | 蔡荣华 | Sheet clamp of plastic sheet tensile testing machine |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849137A (en) * | 2015-05-28 | 2015-08-19 | 常州机电职业技术学院 | Cotton fiber clamping device |
| CN105460514A (en) * | 2015-12-15 | 2016-04-06 | 爱彼思（苏州）自动化科技有限公司 | Round rod transfer device |
| CN105466347A (en) * | 2015-12-15 | 2016-04-06 | 爱彼思（苏州）自动化科技有限公司 | Round bar detection device |
| CN108481714A (en) * | 2018-04-24 | 2018-09-04 | 安徽鲲鹏装备模具制造有限公司 | A kind of assistant formation has the epidermis stretching structure of depths products |
| CN108481714B (en) * | 2018-04-24 | 2023-09-05 | 安徽鲲鹏装备模具制造有限公司 | Skin stretching structure with deep product for auxiliary molding |
| CN113125225A (en) * | 2021-04-15 | 2021-07-16 | 扬州万润光电科技有限公司 | Device for manufacturing film standard sample with load thermal deformation |
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| Publication number | Publication date |
|---|---|
| CN102998172B (en) | 2015-03-25 |
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