CN111721620A - Friction and wear experiment clamp for sheet sample - Google Patents
Friction and wear experiment clamp for sheet sample Download PDFInfo
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- CN111721620A CN111721620A CN202010595617.8A CN202010595617A CN111721620A CN 111721620 A CN111721620 A CN 111721620A CN 202010595617 A CN202010595617 A CN 202010595617A CN 111721620 A CN111721620 A CN 111721620A
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- 238000002474 experimental method Methods 0.000 title claims abstract description 16
- 238000003825 pressing Methods 0.000 claims abstract description 42
- 238000007906 compression Methods 0.000 claims abstract description 19
- 230000006835 compression Effects 0.000 claims abstract description 18
- 238000012360 testing method Methods 0.000 claims description 21
- 229910000838 Al alloy Inorganic materials 0.000 description 11
- 238000009792 diffusion process Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 101100495256 Caenorhabditis elegans mat-3 gene Proteins 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 230000005291 magnetic effect Effects 0.000 description 2
- 238000012512 characterization method Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/04—Chucks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a sheet sample friction wear experiment clamp, which comprises: the upper surface of the backing plate is provided with a sample positioning area, and two sides of the sample positioning area are respectively provided with a screw hole; the buckles correspond to the screw holes one by one, are strip pieces and are provided with a pressing end positioned on the side of the sample positioning area and a supporting end opposite to the pressing end and far away from the side of the sample positioning area, and the middle parts of the buckles are provided with pressure bearing holes; and the compression screw penetrates through the pressure bearing hole and then is screwed with the corresponding screw hole, so that the pressing end presses and holds the flaky sample, and the supporting end is supported on the base plate. The clamping reliability of the sheet sample friction wear experiment clamp based on the invention is relatively good.
Description
Technical Field
The invention relates to a sheet sample friction and wear experiment clamp.
Background
The friction and wear test fixture is widely applied to the fields of machinery, material wear resistance characterization and the like. The friction and wear test firstly needs to fix a test sample on a friction and wear testing machine through a clamp. The sheet-shaped test sample is different from a block-shaped test sample which is easy to clamp, and the sheet-shaped test sample is thin and has obvious two-dimensional characteristics although being a three-dimensional structural member on the whole, so that a common clamp cannot clamp the sheet-shaped test sample or is difficult to clamp.
For example, a ferromagnetic material sheet such as an iron plate can be positioned and clamped by using a magnetic workbench, but the range of the ferromagnetic material is narrow, the types of the samples subjected to friction wear are various, and the magnetic workbench cannot meet the requirements of friction wear experiments of various samples.
Chinese patent document CN108161324A discloses an aluminum alloy heat dissipation cold plate diffusion welding fixture, which comprises a lower pad plate and four Z-shaped fixing clamps, wherein one panel of the Z-shaped fixing clamps is fixed on the lower pad plate through bolts, the middle panel is used for determining the height of the other panel, and the other panel is approximately parallel to the lower pad plate and is provided with threaded holes for providing upper pressing bolts matched with the threaded holes. When the aluminum alloy diffusion welding device is used, an aluminum alloy diffusion welding sample is placed on the lower backing plate, and then the upper pressing bolt is screwed down to clamp a workpiece. In this patent document, since the upper pressure bolt directly acts on the aluminum alloy diffusion welding sample, and the friction force between the tip of the upper pressure bolt and the aluminum alloy diffusion sample is very large in the process in which the upper pressure bolt gradually presses the aluminum alloy diffusion sample by rotation, the aluminum alloy diffusion sample is easily damaged because the pressure is relatively large. Meanwhile, the Z-shaped fixing clamp is integrally suspended and can deform under larger acceptance conditions, so that the upper pressing bolt and the aluminum alloy diffusion sample cannot be kept vertical, and the upper pressing bolt is in a gradually outward floating state, so that the aluminum alloy diffusion sample is rubbed from four corners, the aluminum alloy diffusion sample is easily separated from the lower base plate, a middle bulging state is presented, and the friction and wear test is influenced.
Chinese patent document CN106584150A discloses a clamp for removing a cladding layer from an aluminum alloy sheet, which includes a bracket, a pressing sheet disposed on a front end surface of the bracket, and two or more fastening nuts disposed on the pressing sheet. When the clamping device is used, a workpiece is clamped between the pressing sheet and the bracket, and then the fastening nut is locked to realize clamping. Due to the structure, due to the existence of the fastening nut, the matched screw rod is easy to interfere with a workpiece, and the flexibility of clamping is poor.
Disclosure of Invention
In view of this, the invention aims to provide a friction and wear experiment clamp for a sheet sample with relatively good clamping reliability.
In an embodiment of the present invention, there is provided a sheet specimen frictional wear experiment jig, including:
the upper surface of the backing plate is provided with a sample positioning area, and two sides of the sample positioning area are respectively provided with a screw hole;
the buckles correspond to the screw holes one by one, are strip pieces and are provided with a pressing end positioned on the side of the sample positioning area and a supporting end opposite to the pressing end and far away from the side of the sample positioning area, and the middle parts of the buckles are provided with pressure bearing holes;
and the compression screw penetrates through the pressure bearing hole and then is screwed with the corresponding screw hole, so that the pressing end presses and holds the flaky sample, and the supporting end is supported on the base plate.
Optionally, the pressing surface of the pressing end is a plane or a cylindrical surface;
when cylindrical, its axis is perpendicular to the direction of extension of the plate member.
Optionally, the central angle of the cylindrical surface is 60-100 degrees.
Optionally, the body of the buckle is in a flat condition;
correspondingly, the pressing end is provided with an arch part so as to be positioned at the lower side of the body from the lower edge of the body;
the support end has a support portion or member to balance the arcuate portion so that the body is parallel to the pad.
Optionally, the support member is a screw, and the screw is adjusted to maintain the parallelism between the body and the pad.
Optionally, the support member is a cylindrical member having a ball at its top end;
correspondingly, a ball socket matched with the ball head is formed on the buckle.
Optionally, the lower end of the cylindrical member has a bottom plate which is a circular plate or a rectangular plate;
when the bottom plate is a circular plate, the diameter of the bottom plate is 2-3 times of that of the cylindrical part body;
when the bottom plate is a rectangular plate, the long edge of the rectangular plate is vertical to the direction of the lath of the body; the length of the short side is not less than the diameter of the cylindrical portion body.
Optionally, the pressure bearing hole is an elongated hole, and the extending direction of the elongated hole is the extending direction of the buckle.
Optionally, an elastic washer is arranged between the screw head of the compression screw and the upper surface of the buckle.
Optionally, a flat washer is disposed between the resilient washer and the upper surface of the buckle.
In the embodiment of the invention, the compression screw for applying the original pressure does not directly act on the sheet-shaped sample, but compresses the sheet-shaped sample by virtue of the buckle, the pressure between the buckle and the sheet-shaped sample belongs to positive pressure, and severe friction between the buckle and the sheet-shaped sample cannot be generated in the compression process, so that the sheet-shaped sample cannot be damaged. Meanwhile, the compression screw is equivalent to a middle support, two ends of the buckle are stressed to form a lever-like structure in the pressing process, and the force of the pressing end of the buckle acting on the flaky sample is easily positive through the adjustment of the supporting end of the buckle.
Drawings
FIG. 1 is a schematic diagram of a state of use of a sheet specimen friction wear test fixture in an embodiment.
Fig. 2 is a front view structural schematic diagram of a sheet-like specimen friction wear experiment fixture in an embodiment.
Fig. 3 is a schematic view of an embodiment of a snap structure.
FIG. 4 is a schematic diagram of an embodiment of a support post structure.
In the figure: 1. the test device comprises a clamp, 2 parts of an assembling hole, 3 parts of a backing plate, 4 parts of a test sample, 5 parts of a compression screw and 6 parts of a support column.
11. The ball socket comprises an arc part, 12 a cylindrical support part, 13 a body, 14 a long hole and 15 a ball socket.
61. Bottom plate, 62, pillar, 63, bulb.
Detailed Description
Referring to fig. 1 of the specification, a sheet-like sample is shown as a sample 4 shown in the figure, which is represented as a rectangular sheet-like sample, and two opposite sides of the sheet-like sample are respectively provided with a buckle 1 for pressing and holding the sample 4 at two sides. The clip 1 has a width in the direction of the side where it is pressed or corresponds to, which is usually not less than 15mm, and usually not more than 40 mm.
As can be seen in fig. 3, the clip 1 is generally of a strip-like configuration, the plane of the profile defined by the strip is referred to as the reference plane, and accordingly, the axis of the cylindrical support 12 as shown in fig. 3 is necessarily perpendicular to the reference plane, while the elongated hole 14 extends parallel to the reference plane.
In the structure shown in fig. 1, the sheet sample friction wear experiment clamp mainly includes a backing plate 3, a buckle 1 and a compression screw 5, wherein the backing plate 3 is a rectangular plate in the figure, and the rectangular plate is a common structure of the backing plate 3, and is not described herein again.
The backing plate 3 is typically provided with mounting holes 2, typically unthreaded holes.
In some implementations, the mounting holes 2 may not be provided, but rather the backing plate 3 may be secured to the platform of the testing machine, for example, with T-slot bolts engaging a pressure plate or the like.
The upper surface of the backing plate 3 has a sample positioning area, which usually does not have a predetermined visible shape, but is defined by the position of the catch 1, in other words, the position of the catch 1 determines the size of the sample positioning area.
In particular, for the test piece 4, a standard test piece is generally prepared according to a standard, in other words, the size of the test piece positioning area is predetermined, and the position of the buckle 1 is determined according to the size of the standard pattern.
Correspondingly, one screw hole is provided on each side of the positioning region, and for the purpose of differentiation, the screw hole for the engagement of the compression screw 5 is designated as the first screw hole.
For the snap 1, there is a one-to-one correspondence with the first screw holes, in other words, one snap 1 is assembled using one compression screw 5.
The clip 1 is a plate member as a whole, and as can be seen from fig. 3, the side of the clip 1 is a plane, i.e. the plane defined by the extension profile of the strip member is a plane. The upper surface and the lower surface are curved surfaces formed by extension, and the curved surfaces are perpendicular to the side surfaces of the buckle 1.
The plate condition has one end and the other end which are determined, correspondingly, one end of the buckle 1 used for pressing the sample 4 is marked as a pressing end, and the pressing end is correspondingly positioned on the side of the sample positioning area of the compression screw 5; the other end of the buckle 1 is a support end, which is necessarily located at the other side of the compression screw 5, which is far away from the side where the positioning area is located.
Furthermore, the middle part of the buckle 1 is provided with a pressure bearing hole, such as an elongated hole 14 shown in fig. 3, and the pressure bearing hole is a smooth hole for the screw part of the compression screw 5 to pass through, so as to be connected with the first screw hole.
The compression screw 5 is a bolt with a bolt head that can be restrained by the upper surface of the buckle 1, in other words, the bolt head cannot pass through the bearing hole and can be pressed against the upper surface of the buckle 1 for applying pressure.
Correspondingly, the compression screw 5 penetrates through the pressure bearing hole and then is screwed with the corresponding first screw hole, and the pressure of the buckle 1 acting on the sample 4 is adjusted by adjusting the pre-tightening force. In some applications, a torque wrench may be used to set the amount of pressure that clasp 1 exerts on sample 4.
In order to avoid the direction deflection of the pressure force applied to the sample 4 by the buckle 1, the supporting end is supported on the backing plate 3, so that the overlarge deflection of the acting force of the pressing end caused by the existence of a fit clearance can be limited.
As can be seen from the above description, the process of applying pressure to the sample 4 by the clip 1 is a process of gradually pre-tightening the compression screw 5, and the amount of movement between the clip 1 and the sample 4 is very small or none, and no rigid twisting occurs, so that the surface of the sample 4 is not damaged.
In some embodiments, the pressing surface of the pressing end is a plane, and based on this embodiment, the contact area between the pressing end and the test sample 4 is relatively large, and reliable pressing is easy to obtain.
In other embodiments, the pressing surface of the pressing end is a cylindrical surface, for example, the structure of fig. 3 is the pressing end of the cylindrical support portion 12, the pressing surface provided by the pressing end is a cylindrical surface, and the cylindrical surface acts on the sample 4, even if the body of the buckle 1 cannot be parallel to the pad 3, the cylindrical surface can still be effectively pressed on the sample 4.
In the configuration shown in fig. 3, the axis of the cylindrical support portion 12 is perpendicular to the reference plane, or the extending direction of the plate member. The extending direction is a curve, and the plane defined by the curve is represented as the aforementioned reference plane.
Since the inclination angle of the buckle 1 is usually not too large, in other words, the size of the cylindrical surface of the pressing part can be very small, but the processing difficulty of the very small cylindrical surface is relatively large, for this reason, in a preferred embodiment, the central angle of the cylindrical surface is 60 to 100 degrees.
It is to be understood that the use of other means, such as a nip with a very small central angle, is preferably not excluded per se.
As a further reference, the body of the buckle 1 is a flat plate, and the upper surface of the flat plate should be parallel to the pad 3 under ideal conditions. Of course, the parallelism often cannot meet the ideal condition, and the inclination angle of the body of the general buckle 1 relative to the cushion plate 3 is not too large, and the inclination angle is controlled within 3 degrees.
Correspondingly, the pressing end is provided with an arch part 11 so as to be positioned at the lower side of the body from the lower edge of the body; this structure mainly avoids the assembly interference between the body and the backing plate 3.
Further, the support end has a support portion or member to balance the arcuate portion and to allow the body to be parallel to the pad, where the parallelism is as described or desired, although in mechanical principles it is generally designed to be ideal, but in practice it is permissible to have some tolerance, such as within 3 degrees, as described above.
In some embodiments, the support member is a screw, and the clip 1 is provided with a second screw hole in alignment, so as to maintain the parallelism between the body and the backing plate 3 by adjusting the screwing depth between the screw and the second screw hole.
In some embodiments, as shown in fig. 4 and 3, the support member is a cylindrical member having a ball head 63 at its top end;
correspondingly, the buckle 1 is provided with a ball socket 15 matched with the ball head 63, and the ball head 63 and the ball socket 15 are matched to form a ball hinge structure, so that the deflection angle of the body can be self-adapted, and the rigid elbow is not required.
In the configuration shown in fig. 4, the lower end of the cylindrical member has a bottom plate 61, the bottom plate 61 being shown as a circular plate, but in some embodiments a rectangular plate may be used,
when the bottom plate 61 is a circular plate, the diameter of the bottom plate is 2 to 3 times the diameter of the cylindrical part body, i.e., the pillar 62 shown in fig. 4.
When the bottom plate 61 is a rectangular plate, the long side of the rectangular plate is vertical to the direction of the lath of the body; the length of the short side is not less than the diameter of the cylindrical part body, so that better stability can be obtained.
It will be appreciated that the base plate 61 is seated on the mat 3, or otherwise supported on the upper surface of the mat 3, in engagement rather than being attached.
In the preferred embodiment, the bearing hole is an elongated hole 14 to avoid assembly interference, and the position of the buckle 1 can be adjusted according to the size of a sample, so that the bearing hole has better adaptability.
Accordingly, the extending direction of the elongated hole 14 is the extending direction of the clip 1.
In order to obtain better pre-tightening force control capability, an elastic washer is arranged between the screw head of the compression screw 5 and the matching surface of the buckle 1, and the elastic washer can provide pre-tightening in a certain range and is not easy to loosen. In contrast, in the case of a non-rigid connection, the pretensioning is not sufficient, and the connection is easily released.
In order to avoid the upper surface of the buckle 1 from being abraded in the pre-tightening process, a flat gasket is arranged between the elastic gasket and the upper surface of the buckle 1.
Claims (10)
1. The utility model provides a slice sample frictional wear experiment anchor clamps which characterized in that includes:
the upper surface of the backing plate is provided with a sample positioning area, and two sides of the sample positioning area are respectively provided with a screw hole;
the buckles correspond to the screw holes one by one, are strip pieces and are provided with a pressing end positioned on the side of the sample positioning area and a supporting end opposite to the pressing end and far away from the side of the sample positioning area, and the middle parts of the buckles are provided with pressure bearing holes;
and the compression screw penetrates through the pressure bearing hole and then is screwed with the corresponding screw hole, so that the pressing end presses and holds the flaky sample, and the supporting end is supported on the base plate.
2. The sheet specimen friction wear experiment clamp according to claim 1, wherein the pressing surface of the pressing end is a plane or a cylindrical surface;
when cylindrical, its axis is perpendicular to the direction of extension of the plate member.
3. The sheet specimen friction wear experiment clamp according to claim 2, wherein the central angle of the cylindrical surface is 60-100 degrees.
4. The sheet sample friction wear experiment clamp according to claims 1-3, wherein the body of the buckle is a flat plate;
correspondingly, the pressing end is provided with an arch part so as to be positioned at the lower side of the body from the lower edge of the body;
the support end has a support portion or member to balance the arcuate portion so that the body is parallel to the pad.
5. The friction wear test fixture for sheet samples according to claim 4, wherein the supporting member is a screw, and the screw is adjusted to maintain the parallelism between the body and the pad.
6. The sheet specimen friction wear experiment clamp according to claim 4, characterized in that the supporting part is a cylindrical part, and the top end of the cylindrical part is provided with a ball head;
correspondingly, a ball socket matched with the ball head is formed on the buckle.
7. The friction wear test fixture for sheet samples according to claim 6, wherein the lower end of the cylindrical member is provided with a bottom plate which is a circular plate or a rectangular plate;
when the bottom plate is a circular plate, the diameter of the bottom plate is 2-3 times of that of the cylindrical part body;
when the bottom plate is a rectangular plate, the long edge of the rectangular plate is vertical to the direction of the lath of the body; the length of the short side is not less than the diameter of the cylindrical portion body.
8. The sheet specimen friction wear experiment clamp according to claim 1, wherein the pressure bearing hole is an elongated hole, and the extending direction of the elongated hole is the extending direction of the buckle.
9. The friction and wear test fixture for the sheet samples as claimed in claim 1 or 8, wherein an elastic washer is arranged between the screw head of the compression screw and the upper surface of the buckle.
10. The sheet specimen friction wear test fixture of claim 9, characterized in that a flat washer is arranged between the elastic washer and the upper surface of the buckle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010595617.8A CN111721620A (en) | 2020-06-28 | 2020-06-28 | Friction and wear experiment clamp for sheet sample |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010595617.8A CN111721620A (en) | 2020-06-28 | 2020-06-28 | Friction and wear experiment clamp for sheet sample |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111721620A true CN111721620A (en) | 2020-09-29 |
Family
ID=72569181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010595617.8A Pending CN111721620A (en) | 2020-06-28 | 2020-06-28 | Friction and wear experiment clamp for sheet sample |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111721620A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030000282A1 (en) * | 2001-06-30 | 2003-01-02 | Korea Institute Of Science And Technology | Fine friction and wear test apparatus for plate specimen |
| CN102357819A (en) * | 2011-09-30 | 2012-02-22 | 中国三冶集团有限公司电气安装工程公司 | Device and method for fixing workpiece for T-shaped slot workbench |
| CN202885855U (en) * | 2012-11-07 | 2013-04-17 | 浙江吉利汽车研究院有限公司杭州分公司 | Compression device and instrument comprising compression device |
| CN203317077U (en) * | 2013-05-16 | 2013-12-04 | 瑞鹄汽车模具有限公司 | Clamping device |
| CN203356295U (en) * | 2013-07-04 | 2013-12-25 | 安徽冀东华夏专用车有限公司 | Clamping structure of rectangular tube camber beam forming clamp |
| CN203542164U (en) * | 2013-10-29 | 2014-04-16 | 武汉钢铁(集团)公司 | Numerical control milling jig with adjustable sample width |
| CN204681292U (en) * | 2015-06-10 | 2015-09-30 | 阿特斯(中国)投资有限公司 | Photovoltaic module fixture |
| CN205254594U (en) * | 2015-12-08 | 2016-05-25 | 山西利民工业有限责任公司 | Adj. tabular closing device with adjustable |
| CN205520941U (en) * | 2016-04-26 | 2016-08-31 | 四川建筑职业技术学院 | Metallographic specimen grinds anchor clamps |
| CN208068117U (en) * | 2018-04-18 | 2018-11-09 | 吴江市树盛机械有限公司 | A kind of use in sewing machine machine set fastening clips |
| CN210588192U (en) * | 2019-03-29 | 2020-05-22 | 江苏省沙钢钢铁研究院有限公司 | Clamp for processing plate-shaped tensile sample by vertical lifting table milling machine |
-
2020
- 2020-06-28 CN CN202010595617.8A patent/CN111721620A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030000282A1 (en) * | 2001-06-30 | 2003-01-02 | Korea Institute Of Science And Technology | Fine friction and wear test apparatus for plate specimen |
| CN102357819A (en) * | 2011-09-30 | 2012-02-22 | 中国三冶集团有限公司电气安装工程公司 | Device and method for fixing workpiece for T-shaped slot workbench |
| CN202885855U (en) * | 2012-11-07 | 2013-04-17 | 浙江吉利汽车研究院有限公司杭州分公司 | Compression device and instrument comprising compression device |
| CN203317077U (en) * | 2013-05-16 | 2013-12-04 | 瑞鹄汽车模具有限公司 | Clamping device |
| CN203356295U (en) * | 2013-07-04 | 2013-12-25 | 安徽冀东华夏专用车有限公司 | Clamping structure of rectangular tube camber beam forming clamp |
| CN203542164U (en) * | 2013-10-29 | 2014-04-16 | 武汉钢铁(集团)公司 | Numerical control milling jig with adjustable sample width |
| CN204681292U (en) * | 2015-06-10 | 2015-09-30 | 阿特斯(中国)投资有限公司 | Photovoltaic module fixture |
| CN205254594U (en) * | 2015-12-08 | 2016-05-25 | 山西利民工业有限责任公司 | Adj. tabular closing device with adjustable |
| CN205520941U (en) * | 2016-04-26 | 2016-08-31 | 四川建筑职业技术学院 | Metallographic specimen grinds anchor clamps |
| CN208068117U (en) * | 2018-04-18 | 2018-11-09 | 吴江市树盛机械有限公司 | A kind of use in sewing machine machine set fastening clips |
| CN210588192U (en) * | 2019-03-29 | 2020-05-22 | 江苏省沙钢钢铁研究院有限公司 | Clamp for processing plate-shaped tensile sample by vertical lifting table milling machine |
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Application publication date: 20200929 |