CN102998172B - Sheet clamp of plastic sheet tensile testing machine - Google Patents
Sheet clamp of plastic sheet tensile testing machine Download PDFInfo
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- CN102998172B CN102998172B CN201210581982.9A CN201210581982A CN102998172B CN 102998172 B CN102998172 B CN 102998172B CN 201210581982 A CN201210581982 A CN 201210581982A CN 102998172 B CN102998172 B CN 102998172B
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- compressing tablet
- tablet 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 the plastic sheet cupping machine that plastic sheet can be drawn into plastic sheeting, specifically, relate to a kind of sheet material fixture for plastic sheet cupping machine.
Background technology
When developing new plastic sheeting product, composition of raw materials must be checked whether accurate.In order to save the raw material dosage in development process, reduce development cost, at present, plastic sheeting manufacturer and research and development institution extensively adopt plastic sheet cupping machine to test, be equipped with a small amount of raw material according to new raw material formula, make certain thickness plastic sheet (or claiming thick film sheet), then on plastic sheet cupping machine, plastic sheet is drawn into plastic sheeting, then test the physical property of plastic sheeting, mechanical performance etc. whether to meet the requirements, to check composition of raw materials whether accurate.
Drawing mechanism is one of key component in plastic sheet cupping machine, the drawing mechanism of the biaxial tensile test machine that Chinese utility model patent description CN2835987 announces, its structure is simple, run comparatively reliable, under the cooperation of other mechanism of biaxial tensile test machine, accurately can complete the stretched operation of different multiples, plastic sheet is drawn into the uniform plastic sheeting of thickness, for performance of plastic film test provides superior in quality sample, guarantee the accuracy of testing, the exploitation for Novel plastic-film product provides great help.This drawing mechanism comprises two pairs of guide rails and driven unit, four groups of fixtures and driven unit thereof.During use, rectangle (being preferably square) plastic sheet suitable for the thickness made by newly filling a prescription is installed on drawing mechanism, namely rectangular plastic sheet material is placed between four groups of fixtures, and makes four edges, limit of four groups of fixtures difference clamp rectangular plastic sheets; Plastic sheet is heated to suitable temperature by biaxial tensile test machine; Then right guide rail is driven into by guide rail driven unit opposing to translation, and by fixture driven unit, make to increase gradually with the distance in group fixture between each fixture, and remain that fixture is evenly arranged, complete the stretching of plastic sheet, plastic sheet is drawn into the plastic sheeting of predetermined shape and size.Wherein, the preferred air-actuated jaw of fixture, all air-actuated jaws are controlled by same compressed air source, keep strokes.
In existing drawing mechanism, the fixture (i.e. sheet material fixture) for grip plastic sheet edge comprises clamp body, intermediate plate cylinder, lower plate and train wheel bridge; Lower plate is fixed at the inner side (when the inner side of clamp body refers to use, clamp body is near the side of plastic sheet) of clamp body, and lower plate with fixture made in one piece or can be fixedly connected with clamp body by connector; The cylinder body of intermediate plate cylinder is fixedly mounted on clamp body, and the piston rod of intermediate plate cylinder down, and train wheel bridge is fixedly mounted on the piston rod of intermediate plate cylinder, and train wheel bridge is in directly over lower plate.When the piston rod of intermediate plate cylinder stretches out, train wheel bridge is driven to decline and jointly clamped at the edge of plastic sheet with lower plate.But, in the process of stretched plastic sheet material, there will be situation that fixture and plastic sheet edge be separated (be commonly referred to de-press from both sides phenomenon), its reason is that the frictional force between fixture and plastic sheet is too small, so that occurs between fixture and plastic sheet edge skidding and being separated.In order to solve the problem, can improve the compressed-air actuated air pressure driving intermediate plate cylinder, and/or adopt the intermediate plate cylinder that piston area is larger, to increase the power output of intermediate plate cylinder, thus increase intermediate plate cylinder is applied to the pressure on train wheel bridge.But the tolerance air pressure of intermediate plate cylinder is limited, in order to ensure safety, drive the compressed-air actuated air pressure of intermediate plate cylinder can only control within limits, the power output of intermediate plate cylinder is restricted; And increase the rod areas of intermediate plate cylinder, the volume of intermediate plate cylinder must be increased, take larger space, make cannot fully close up with group fixture in drawing mechanism, reduce draw ratio.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of sheet material fixture of plastic sheet cupping machine, and this sheet material clamp structure is simply compact, and can by plastic sheet edge reliable grip in the process of stretched plastic sheet material.The technical scheme adopted is as follows:
A kind of sheet material fixture of plastic sheet cupping machine, comprise clamp body and horizontal clamping plate, horizontal Boards wall is located at the inner side of clamp body, it is characterized in that: described sheet material fixture also comprises compressing tablet bar and the compressing tablet bar position of compressing tablet bar reciprocally swinging can be driven to switch cylinder, compressing tablet bar position switches cylinder and is arranged on clamp body, compressing tablet bar is rotatably arranged on clamp body, the turning cylinder of compressing tablet bar and the upper surface of horizontal clamping plate are parallel to each other, and the piston rod that compressing tablet bar top switches cylinder with compressing tablet bar position coordinates; Compressing tablet bar lower end has rotation prevention portion, on the lower surface of described rotation prevention portion each point and compressing tablet bar turning cylinder between distance be greater than distance between the turning cylinder of compressing tablet bar and the upper surface of horizontal clamping plate, rotation prevention portion is in the top of horizontal clamping plate, and rotation prevention portion is in the outside of the turning cylinder of compressing tablet bar.
In the present invention, near the side of the plastic sheet that will stretch when inner side refers to use, away from the side of the plastic sheet that will stretch when outside refers to use.
Above-mentioned horizontal clamping plate can with fixture made in one piece, also by connector, horizontal clamping plate can be fixedly connected with clamp body.
In a kind of preferred version, the cylinder body that above-mentioned compressing tablet bar position switches cylinder is fixedly mounted on clamp body, compressing tablet bar top (namely compressing tablet bar being in the part of more than its turning cylinder) is provided with bar hole, the piston rod that compressing tablet bar position switches cylinder is provided with the first pin, and this first pin is in described bar hole.Compressing tablet bar position switches cylinder and is usually fixedly mounted in the horizontal direction on clamp body.Above-mentioned bar hole extends along the length direction on compressing tablet bar top usually.
In another kind of preferred version, cylinder body and the clamp body of above-mentioned compressing tablet bar position switching cylinder are hinged, and compressing tablet bar position switches piston rod and the compressing tablet bar upper end thereof of cylinder.
In a kind of concrete scheme, above-mentioned clamp body is fixed with axis pin base, and axis pin base is in the top of horizontal clamping plate, and compressing tablet bar is rotatably arranged on (axis of alignment pin is the turning cylinder of compressing tablet bar) on 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; The sheet material insert port can inserted for plastic sheet edge is formed between the medial extremity of axis pin base and the medial extremity of horizontal clamping plate.
The position that preferred above-mentioned compressing tablet bar top coordinates with the piston rod that compressing tablet bar position switches cylinder to the distance of the turning cylinder of compressing tablet bar is greater than the distance of turning cylinder to compressing tablet bar lower end of compressing tablet bar, like this, utilize lever principle, requirement compressing tablet bar position being switched to cylinder power output can be reduced, less cylinder can be selected.
The lower surface of above-mentioned compressing tablet bar coordinates with the upper surface of horizontal clamping plate, is clamped at the edge 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 inner side of rotation prevention portion, on the lower surface of clamping part each several part and compressing tablet bar turning cylinder between distance be less than distance between the turning cylinder of compressing tablet bar and the upper surface of horizontal clamping plate, now the lower surface of clamping part and the lower surface of rotation prevention portion are as the clamping face with plastic sheet edge mate; Distance on the lower surface of more preferably clamping part between each several part and the turning cylinder of compressing tablet bar increases gradually inside compressing tablet bar to compressing tablet bar.In another kind of concrete scheme, above-mentioned rotation prevention portion is positioned at position in the inner part, compressing tablet bar lower end, and now the lower surface of rotation prevention portion is as the clamping face with plastic sheet edge mate.
When plastic sheet to be tensioned is installed in preparation, compressing tablet bar lower end, to side oscillation outside clamp body, forms the gap can inserted for plastic sheet edge between compressing tablet bar lower end and the upper surface of horizontal clamping plate; Plastic sheet edge inserts gap between compressing tablet bar lower end and the upper surface of horizontal clamping plate and after arriving precalculated position, compressing tablet bar position switches cylinder action, pull compressing tablet bar upper end laterally, make compressing tablet bar lower end to side oscillation in clamp body, compressing tablet bar lower end declines and presses to the upper surface of horizontal clamping plate, compressing tablet bar lower end applies downward pressure to plastic sheet edge, is jointly clamped at position corresponding for plastic sheet edge with horizontal clamping plate by compressing tablet bar lower end.Subsequently, in drawing process, plastic sheet applies active force (this active force is frictional force) to compressing tablet bar lower end, and compressing tablet bar position switches the sustainable maintenance of cylinder to compressing tablet bar upper end applying pulling force laterally simultaneously, makes compressing tablet bar lower end have the trend of side oscillation in clamp body; In compressing tablet bar lower end in the process of side oscillation in clamp body, compressing tablet bar lower end increases gradually to the downward pressure that plastic sheet edge applies, and more tightly plastic sheet is pressed to horizontal clamping plate, thus obtains tighter by the edge clamping of plastic sheet.Because compressing tablet bar lower end has rotation prevention portion, when this rotation prevention portion withstands horizontal clamping plate, horizontal clamping plate can stop compressing tablet bar lower end inwardly to swing further (that is in sheet material fixture, between horizontal clamping plate and compressing tablet bar, there is auto-lock function), and the downward pressure that compressing tablet bar lower end applies plastic sheet edge is larger, therefore the frictional force between compressing tablet bar lower end and plastic sheet edge is larger, there will not be the situation that sheet material fixture and plastic sheet edge are separated in drawing process.
In the present invention, compressing tablet bar position switches cylinder and plays the effect switching compressing tablet bar position, and when preparing stretching for compressing tablet bar lower end provides initial pressure, position corresponding for plastic sheet edge is clamped by compressing tablet bar lower end jointly with horizontal clamping plate; And in drawing process, the pulling force that the active force relying on plastic sheet edge to apply compressing tablet bar lower end and compressing tablet bar position switching cylinder apply compressing tablet bar upper end, drive compressing tablet bar lower end to side oscillation in clamp body, make compressing tablet bar lower end make compressing tablet bar lower end more tightly plastic sheet be pressed to horizontal clamping plate, position corresponding for plastic sheet edge is clamped with horizontal clamping plate by compressing tablet bar lower end jointly.Therefore, the power output that the present invention switches cylinder to compressing tablet bar position is less demanding, can adopt less cylinder, make the structure of sheet material fixture more simply 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 drawing process, avoids de-folder phenomenon occurs, and guarantees that sheet material fixture can by plastic sheet edge reliable grip.
Accompanying drawing explanation
Fig. 1 is the structural representation of the preferred embodiment of the present invention;
Fig. 2 is the schematic diagram of another duty of sheet material fixture shown in Fig. 1;
Fig. 3 is the enlarged drawing of part A in Fig. 2.
Detailed description of the invention
As shown in Figure 1-Figure 3, the sheet material fixture of this plastic sheet cupping machine comprises clamp body 1, horizontal clamping plate 2, compressing tablet bar 3 and compressing tablet bar position switching cylinder 4.
Horizontal clamping plate 2 are fixed at the inner side (namely clamp body 1 is near the side of the plastic sheet 5 that will stretch) of clamp body 1.Horizontal clamping plate 2 can make one with clamp body 1, also can be fixedly connected with clamp body 1 by horizontal clamping plate 2 by connector.
Compressing tablet bar 3 is rotatably arranged on clamp body 1, the turning cylinder 8 of compressing tablet bar 3 is parallel to each other with the upper surface of horizontal clamping plate 2, in the present embodiment, clamp body 1 is fixed with axis pin base 6, axis pin base 6 is in the top of horizontal clamping plate 2, and compressing tablet bar 3 is rotatably arranged on (axis of alignment pin 7 is the turning cylinder 8 of compressing tablet bar 3) on axis pin base 6 by alignment pin 7; The lower end of compressing tablet bar 3 is between axis pin base 6 and horizontal clamping plate 2; The sheet material insert port 9 can inserted for plastic sheet 5 edge is formed between the medial extremity of axis pin base 6 and the medial extremity of horizontal clamping plate 2.
Compressing tablet bar position switches cylinder 4 can drive compressing tablet bar 3 reciprocally swinging, in the present embodiment, the cylinder body 41 that compressing tablet bar position switches cylinder 4 is fixedly mounted on clamp body 1, compressing tablet bar 3 top (namely compressing tablet bar 3 being in the part of its turning cylinder more than 8) is provided with bar hole 10, bar hole 10 extends along the length direction on compressing tablet bar 3 top, the piston rod 42 of compressing tablet bar position switching cylinder 4 is provided with the first pin 11, first pin 11 and is in bar hole 10.The position that the piston rod 42 that compressing tablet bar 3 top switches cylinder 4 with compressing tablet bar position coordinates is bar hole 10, the distance of the turning cylinder 8 of bar hole 10 to compressing tablet bar 3 is greater than the distance of turning cylinder 8 to compressing tablet bar 3 lower end of compressing tablet bar 3, like this, utilize lever principle, requirement compressing tablet bar position being switched to cylinder 4 power output can be reduced, less cylinder can be adopted.
Compressing tablet bar 3 lower end has rotation prevention portion 31, with reference to figure 3, on the lower surface of rotation prevention portion 31 each point and compressing tablet bar 3 turning cylinder 8 between distance R
1be greater than the distance R between the turning cylinder 8 of compressing tablet bar 3 and the upper surface of horizontal clamping plate 2
0rotation prevention portion 31 is in the top (rotation prevention portion 31 is between axis pin base 6 and horizontal clamping plate 2) of horizontal clamping plate 2, and rotation prevention portion 31 is in the outside (that is, rotation prevention portion 31 is in the outside of the plane perpendicular to horizontal clamping plate 2 upper surface at turning cylinder 8 place) of the turning cylinder 8 of compressing tablet bar 3.
In addition, compressing tablet bar 3 lower end also can have clamping part 32, and clamping part 32 is in the inner side of rotation prevention portion 31, on the lower surface of clamping part 32 each several part and compressing tablet bar 3 turning cylinder 8 between distance R
2be less than the distance R between the turning cylinder 8 of compressing tablet bar 3 and the upper surface of horizontal clamping plate 2
0, and on the lower surface of clamping part 32 each several part and compressing tablet bar 3 turning cylinder 8 between distance R
2increase gradually to compressing tablet bar 3 inside compressing tablet bar 3.The lower surface of clamping part 32 and the lower surface of rotation prevention portion 31 are as the clamping face with plastic sheet 5 edge mate, and when sheet thickness is larger, the lower surface of clamping part 32 is as clamping face, and when sheet thickness is less, the lower surface of rotation prevention portion 31 is as clamping face.
The operation principle of brief description once this sheet material fixture:
With reference to figure 1, when plastic sheet to be tensioned is installed in preparation, the piston rod 42 that compressing tablet bar position switches cylinder 4 stretches out, and drives compressing tablet bar 3 lower end to the outer side oscillation of clamp body 1, forms the gap can inserted for plastic sheet edge between compressing tablet bar 3 lower end and the upper surface of horizontal clamping plate 2.
Referring to figs. 2 and 3, plastic sheet 5 edge inserts gap between compressing tablet bar 3 lower end and the upper surface of horizontal clamping plate 2 and after arriving precalculated position, the piston rod 42 that compressing tablet bar position switches cylinder 4 shrinks, pull compressing tablet bar 3 upper end laterally, make compressing tablet bar 3 lower end to side oscillation in clamp body 1, compressing tablet bar 3 lower end declines and presses to the upper surface of horizontal clamping plate 2, compressing tablet bar 3 lower end applies downward pressure to plastic sheet 5 edge, is jointly clamped at position corresponding for plastic sheet 5 edge with horizontal clamping plate 2 by compressing tablet bar 3 lower end.
Subsequently, in drawing process, plastic sheet 5 pairs of compressing tablet bar 3 lower ends apply active force (this active force is frictional force), and the lasting maintenance of the cylinder of compressing tablet bar position switching simultaneously 4 applies pulling force laterally to compressing tablet bar 3 upper end, makes compressing tablet bar 3 lower end have the trend of side oscillation in clamp body 1; In the process of compressing tablet bar 3 lower end to side oscillation in clamp body 1, compressing tablet bar 3 lower end increases gradually to the downward pressure that plastic sheet 5 edge applies, and more tightly plastic sheet 5 is pressed to horizontal clamping plate 2, thus obtains tighter by the edge clamping of plastic sheet 5.Because compressing tablet bar 3 lower end has rotation prevention portion 31, when this rotation prevention portion 31 withstands horizontal clamping plate 2 (accompanying plastic sheet 5 between rotation prevention portion 31 and horizontal clamping plate 2), horizontal clamping plate 2 can stop compressing tablet bar 3 lower end inwardly to swing further (that is in sheet material fixture, between horizontal clamping plate 2 and compressing tablet bar 3, there is auto-lock function), and the downward pressure that compressing tablet bar 3 lower end applies plastic sheet 5 edge is larger, make the frictional force between compressing tablet bar 3 lower end and plastic sheet 5 edge larger, thus in drawing process, there will not be the situation that sheet material fixture and plastic sheet edge are separated.
In other embodiments, cylinder body and the clamp body of compressing tablet bar position switching cylinder are hinged, and compressing tablet bar position switches piston rod and the compressing tablet bar upper end thereof of cylinder.
In other embodiments, the rotation prevention portion on compressing tablet bar also can be positioned at position in the inner part, compressing tablet bar lower end, and now the lower surface of rotation prevention portion is as the clamping face with plastic sheet edge mate.
Claims (5)
1. the sheet material fixture of a plastic sheet cupping machine, comprise clamp body and horizontal clamping plate, horizontal Boards wall is located at the inner side of clamp body, it is characterized in that: described sheet material fixture also comprises compressing tablet bar and the compressing tablet bar position of compressing tablet bar reciprocally swinging can be driven to switch cylinder, compressing tablet bar position switches cylinder and is arranged on clamp body, compressing tablet bar is rotatably arranged on clamp body, the turning cylinder of compressing tablet bar and the upper surface of horizontal clamping plate are parallel to each other, and the piston rod that compressing tablet bar top switches cylinder with compressing tablet bar position coordinates; Compressing tablet bar lower end has rotation prevention portion, on the lower surface of described rotation prevention portion each point and compressing tablet bar turning cylinder between distance be greater than distance between the turning cylinder of compressing tablet bar and the upper surface of horizontal clamping plate, rotation prevention portion is in the top of horizontal clamping plate, and rotation prevention portion is in the outside of the turning cylinder of compressing tablet bar.
2. the sheet material fixture of plastic sheet cupping machine according to claim 1, it is characterized in that: the cylinder body that described compressing tablet bar position switches cylinder is fixedly mounted on clamp body, compressing tablet bar top is provided with bar hole, the piston rod that compressing tablet bar position switches cylinder is provided with the first pin, and this first pin is in described bar hole.
3. the sheet material fixture 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 fixture of plastic sheet cupping machine according to claim 1, is characterized in that: cylinder body and the clamp body of described compressing tablet bar position switching cylinder are hinged, and compressing tablet bar position switches piston rod and the compressing tablet bar upper end thereof of cylinder.
5. the sheet material fixture of the plastic sheet cupping machine according to any one of claim 1-4, it is characterized in that: described clamp body is fixed with axis pin base, axis pin base is in the top of horizontal clamping plate, and compressing tablet bar is rotatably arranged on 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102998172A CN102998172A (en) | 2013-03-27 |
| CN102998172B true CN102998172B (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210581982.9A Active CN102998172B (en) | 2012-12-28 | 2012-12-28 | Sheet clamp of plastic sheet tensile testing machine |
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| Country | Link |
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| CN (1) | CN102998172B (en) |
Cited By (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 |
Families Citing this family (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 |
| 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 |
| 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 |
| 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 |
| CN113125225B (en) * | 2021-04-15 | 2022-08-19 | 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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| 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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2012
- 2012-12-28 CN CN201210581982.9A patent/CN102998172B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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| Publication number | Publication date |
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| CN102998172A (en) | 2013-03-27 |
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