CN104406845A - Line-surface contact type upper specimen clamp capable of automatically leveling - Google Patents
Line-surface contact type upper specimen clamp capable of automatically leveling Download PDFInfo
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- CN104406845A CN104406845A CN201410704384.5A CN201410704384A CN104406845A CN 104406845 A CN104406845 A CN 104406845A CN 201410704384 A CN201410704384 A CN 201410704384A CN 104406845 A CN104406845 A CN 104406845A
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- leveling
- matrix
- pressing plate
- chuck body
- clamp
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Abstract
The invention discloses a line-surface contact type upper specimen clamp capable of automatically leveling and belongs to a specimen clamp for a friction wear test machine. The line-surface contact type upper specimen clamp comprises a base body, wherein the base body is fixed on a bottom plate, one end of the base body is further movably connected with a base body press plate, and a locking device is further arranged at the other ends of the base body and the base body press plate. The upper specimen clamp further comprises a clamp body and a clamp press plate, wherein a second clamping surface is formed by the clamp body and the outer side surface of the clamp press plate, arc-shaped clamping concave surfaces are arranged on both the clamp body and the inner side of the clamp press plate, and a leveling semi-cylindrical surface is also arranged on the bottom of the clamp body. The clamp body can also be driven to freely rotate around an axis of the leveling semi-cylindrical surface in a radial direction through the leveling semi-cylindrical surface at the bottom of the clamp body, and an upper specimen clamped can be driven to freely rotate under the action of external load, so that after the upper specimen and a lower specimen are in uniform and complete contact, the clamp body, the clamp press plate and the specimens are locked by the locking device, the uniform contact of the upper and lower specimens can be ensured, and the accuracy of test data is effectively improved.
Description
Technical field
The present invention relates to a kind of specimen holder for friction wear testing machine, in particular, the present invention relates generally to one can specimen holder on self-leveling line face contact type.
Background technology
Owing to there is relative motion, make between the mechanical component that contact with each other because friction causes part injury.Fretting wear is a kind of injury pattern occurred in the mechanical component of minimum amplitude motion, is a kind of damage type the most common, the most general in engineering.Being carried out the friction and wear behavior of research material by simulation actual condition environment, is the effective means of elevating gear part life.Friction wear testing machine is a kind of scientific instrument for rubbing wear and greasy property between research material surface in contact, and gripping of experiment sample is the important step truly reflecting material friction wear properties.In order to can real simulation actual condition environment, frictional wear experiment requires that the test surfaces of upper and lower sample must complete uniform contact.The specimen holder of an excellent performance except ensureing the complete uniform contact in upper and lower sample testing face, the easy clamping of fixture, high rigidity, wear-resistant, do not damage sample, clamping stablizes firmly and small portable performance is also the basic demand of high performance grinding abrasion tester.Especially for micro-moving frictional wear experiment, due to the amplitude very little (usually in micron level) of motion, more the rigidity of fixture and clamping stability are had higher requirement.
At present, the domestic patent about sample for testing machine fixture focuses mostly in material stretch test machine, if publication number is the Chinese invention patent of CN103645092, Authorization Notice No. is the Chinese utility model patent etc. of CN203629956, and the specimen holder being directed to friction wear testing machine yet there are no granted patent.In frictional wear experiment, common sample contacts mode mainly contains point-face contact, line-face contacts, face-face contacts three kinds of forms.In frictional wear experiment, common sample contacts mode mainly contains point-face contact, line-face contacts, face-face contacts three kinds of forms, and wherein, line contact type is the most common.Shown in Fig. 1 is reach the standard grade-main the clamp structure of face contact type sample in current market.The type fixture processes a groove in apparatus main body, and cylindrical sample is placed wherein.Two screws are utilized to be tightened from the side.The feature of the type fixture is that structure is simple, but because in clamping process, screw directly contacts with specimen surface, thus: 1) while lock-screw screws, cause sample two ends that displacement in various degree occurs, sample is tilted; 2), in the process screwed at screw, screw forward ends thereof sample, easily causes the local damage of circular sample cylinder; 3) belong to point cantact form between two screw end faces and cylinder sample side, easily loosen, the firm grip of sample can not be ensured.And, due to the impact of machining precision, assembly precision etc., in frictional wear experiment, the angle that one less all can be had between upper and lower sample, can not complete uniform contact, as shown in Figure 2, thus cause the deviation of experimental test data, be therefore necessary that the clamp structure for existing upper sample does further improvement.
Summary of the invention
An object of the present invention is for above-mentioned deficiency, there is provided one can specimen holder on self-leveling line face contact type, to expect to solve in prior art because screw directly contacts with specimen surface, after causing clamping, sample two ends are subjected to displacement, and screw extruded sample easily causes local damage, stability is inadequate, and up and down cannot the technical matters such as uniform contact between sample after clamping.
For solving above-mentioned technical matters, the present invention by the following technical solutions:
One provided by the present invention can specimen holder on self-leveling line face contact type, comprise matrix, described matrix is fixed on base plate, and one end of described matrix is also flexibly connected with matrix pressing plate, the other end of described matrix and matrix pressing plate is also provided with locking device, and the inner side of described matrix and matrix pressing plate forms the first clamping surface, described clamping surface is also provided with slip-off preventing buckle; Described upper specimen holder also comprises chuck body and fixture pressing plate, the lateral surface of described chuck body and fixture pressing plate forms the second clamping surface, described second clamping surface is provided with the slip-off preventing bayonet socket matched with described slip-off preventing buckle, the inner side of described chuck body and fixture pressing plate is equipped with arc and clamps concave surface, the bottom of described chuck body is also provided with leveling semicylinder, described leveling semicylinder is used for tangent with described base plate, and the axis that the axis of described leveling semicylinder and chuck body and fixture pressing plate inside arc clevis hold concave surface intersects.
As preferably, further technical scheme is: the axis that the axis of described leveling semicylinder and chuck body and fixture pressing plate inside arc clevis hold concave surface is perpendicular.
Further technical scheme is: the center line bottom described leveling semicylinder and chuck body coincides, and the two ends of described leveling semicylinder flush with the two ends bottom described chuck body.
Further technical scheme is: the axis of axis and sample that described chuck body and fixture pressing plate inside arc clevis hold concave surface coincides, and described chuck body and fixture pressing plate inside arc clevis hold the longitudinal section radius of concave surface, also equal with the radius of longitudinal section, sample holder direction.
Further technical scheme is: described locking device is the first screw that matrix is mutually corresponding with matrix pressing plate end, for matrix and matrix pressing plate being locked by bolt or screw.
Further technical scheme is: described matrix is flexibly connected by bearing pin with the end of matrix pressing plate.
Further technical scheme is: described base plate is rectangle, and is equipped with the second screw near four of described base plate angles, for upper specimen holder is arranged on friction wear testing machine.
Further technical scheme is: described slip-off preventing buckle and slip-off preventing bayonet socket are the step-like structure mutually coincide.
Compared with prior art, one of beneficial effect of the present invention is: pass through chuck body and fixture platen clamp sample by matrix and matrix pressing plate, avoid screw directly and sample contacts in the process of tightening screw, cause sample local damage, and by chuck body and fixture pressing plate, sample is wrapped in wherein, the mode directly contacted with the face of cylinder ensures that sample can by stable clamping, and chuck body also can be made to rotate freely around the axis radial direction of leveling semicylinder by the leveling semicylinder bottom chuck body, make it under the effect of plus load, the upper sample of clamping can be driven freely to rotate, thus make upper and lower sample evenly completely contact after, by locking device locking fixture body and fixture pressing plate and sample, ensure that upper and lower sample can uniform contact, the accuracy of effective lifting test test data, simultaneously one provided by the present invention can on self-leveling line face contact type specimen holder structure simple, be suitable for suitability for industrialized production, and after adjust size, can be used for the clamping of all size cylindricality sample, range of application is wide.
Accompanying drawing explanation
Fig. 1 is the clamp structure schematic diagram of prior art;
Fig. 2 is the surface of contact schematic diagram of upper sample and lower sample contacts;
Fig. 3 is the structural representation for illustration of one embodiment of the invention;
Fig. 4 is for illustration of the matrix in one embodiment of the invention and matrix pressure plate structure schematic diagram;
Fig. 5 is for illustration of the chuck body in one embodiment of the invention and fixture pressure plate structure schematic diagram;
In figure, 1 for matrix, 2 for matrix pressing plate, 3 be the first clamping surface, 4 for slip-off preventing buckle, 5 for chuck body, 6 for fixture pressing plate, 7 be the second clamping surface, 8 for slip-off preventing bayonet socket, 9 for arc clamping concave surface, 10 for leveling semicylinder, 11 for base plate, 12 be the first screw, 13 for bearing pin, 14 be the second screw, 15 for sample, 16 be bolt or screw.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further elaborated.
With reference to figure 3 with shown in Fig. 4, one embodiment of the present of invention are that one can specimen holder on self-leveling line face contact type, comprise matrix 1, this matrix 1 is fixed on base plate 11, and one end of matrix 1 also needs to be flexibly connected with matrix pressing plate 2, what is more important aforementioned substrates 1 and the other end of matrix pressing plate 2 are also provided with locking device, and matrix 1 forms the first clamping surface 3 with the inner side of matrix pressing plate 2, and be also provided with slip-off preventing buckle 4 on clamping surface; After being locked in matrix 1 and one end of matrix pressing plate 2 by locking device, a clamping chamber can be formed between the two.
Shown in composition graphs 5, corresponding with the structure in above-mentioned clamping chamber is, upper specimen holder in the present embodiment also should comprise chuck body 5 and fixture pressing plate 6, and chuck body 5 and the lateral surface of fixture pressing plate 6 form the second clamping surface 7, this second clamping surface 7 is for after above-mentioned clamping chamber is formed, contact closely with the first clamping surface 3, and, for preventing chuck body 5 fixture pressing plate 6 from deviating from from clamping chamber, also the slip-off preventing bayonet socket 8 matched with slip-off preventing buckle 4 need be set up on the second clamping surface 7; And go out as shown in Figure 5, chuck body 5 and the inner side of fixture pressing plate 6 are equipped with arc and clamp concave surface 9;
Further, based on the above-mentioned effect of slip-off preventing buckle 4 with slip-off preventing bayonet socket 8, inventor carries out multiple conception to both structures, but consider the convenience that part is formed, assembling uses of fixture itself, inventor finally abandons complicated buckle structure, have selected a kind of relative ease, and be easy to the locking structure of processing, be specially and will the step-like structure mutually coincide adopted as above-mentioned slip-off preventing buckle 4 and slip-off preventing bayonet socket 8.
With prior art have significantly distinguish be, leveling semicylinder 10 is also provided with in the bottom of above-mentioned chuck body 5, this leveling semicylinder 10 is for tangent with described base plate 11, and the axis that the axis of leveling semicylinder 10 and chuck body 5 and fixture pressing plate 6 inside arc clevis hold concave surface 9 intersects, by this leveling semicylinder 10, the radial rotary of cylindricality sample 15 can be realized.About the particular location of aforementioned leveling semicylinder 10, inventors performed test, and with reference to the conventional structure of matrix in accompanying drawing 1 and chuck body 5, think the axis of leveling semicylinder 10 axially being held concave surface 9 with chuck body 5 and fixture pressing plate 6 inside arc clevis perpendicular be one preferably position arrange.
In the present embodiment, sample 15 is clamped by chuck body 5 and fixture pressing plate 6 by matrix 1 and matrix pressing plate 2, avoid screw directly and sample contacts in the process of tightening screw, cause sample local damage, and by chuck body 5 and fixture pressing plate 6, sample is wrapped in wherein, the mode directly contacted with the face of cylinder ensures that sample can by stable clamping, and chuck body also can be made to rotate freely around the axis radial direction of leveling semicylinder 10 by the leveling semicylinder 10 bottom chuck body 5, make it under the effect of plus load, the upper sample of clamping can be driven freely to rotate, thus make upper and lower sample evenly completely contact after, by locking device locking fixture body and fixture pressing plate and sample, ensure that upper and lower sample can uniform contact, the accuracy of effective lifting test test data.
Same, the stability on base plate 11 top is placed in for increasing leveling semicylinder 10, also the position of leveling semicylinder 10 can be set to chuck body 5 bottom center line coincide, and the two ends of described leveling semicylinder 10 flush with the two ends bottom described chuck body 5.
In an alternative embodiment of the invention, for increasing the stability that sample 15 clamps, as size setting more closely, the axis above-mentioned chuck body 5 and fixture pressing plate 6 inside arc clevis can being held concave surface 9 is set to coincide with the axis of sample 15, and make chuck body 5 and fixture pressing plate 6 inside arc clevis hold the longitudinal section radius of concave surface 9, equal with the radius of longitudinal section, sample holder direction.
According to another embodiment of the present invention, for making above-mentioned locking device energy for convenience detach, using being arranged on matrix 1 first screw 12 mutually corresponding with matrix pressing plate 2 end as above-mentioned locking device, namely by bolt or screw 16, matrix 1 and matrix pressing plate 2 can be locked.
In addition, folding can be facilitated for convenience of matrix 1 and one end of matrix pressing plate 2, inventor is with reference to prior art, matrix 1 is flexibly connected by bearing pin 13 with wherein one end of matrix pressing plate 2, and for convenience of the installation of fixture on friction wear testing machine, above-mentioned base plate 11 can be set to rectangle, and near four angles of base plate 11, respectively set up second screw 14, for upper specimen holder being arranged on friction wear testing machine by bolt by screw.
Than that described above, the present invention also has following features:
1, fixture adopts cylindric sample, and sample 15 and arc clamp concave surface 9 and have same radius-of-curvature, ensure that sample 15 clamps the accuracy of rear axial location, solve the problem of sample centering;
2 to rely on screw to hold out against the mode of sample different with conventional brace, and the present invention, by chuck body and fixture platen clamp sample, avoids screw forward ends thereof sample in the process of tightening screw and easily causes the defect of circular sample cylinder local damage;
3, adopt fixture pressing plate to match with specimen holder, by cylindrical sample envelope in fixture, realize the stable holding of sample in the mode of Cylindrical Surfaces Contact;
4, by the radius-of-curvature of sample anchor groove face on amendment chuck body, fixture pressing plate, this fixture can clamp the cylindrical sample of any radius;
5, chuck body can rotate freely around leveling semicylinder 10 axis in matrix, under the effect of plus load, upper sample freely can rotate along with the state of lower sample plane, thus make upper and lower sample reach the object of complete uniform contact, and test after fixing contact condition by lock-screw, the accuracy of lifting test data;
6, the clamping that fixture realizes sample by bearing pin and lock-screw is fixed, specimen clamping, easy removal.And whole clamp structure is compact, number of parts is few, volume is little.The whole height of fixture can be less than 20mm, is conducive to reducing moment of flexure to the impact of test result, improves measuring accuracy;
7, this fixture critical part matrix, matrix pressing plate, chuck body, fixture pressing plate are after heat treatment made by wear-resisting, corrosion-resistant material GCr15 height carbon bearing steel, long service life, Maintenance free.
Than that described above, also it should be noted that spoken of in this manual " embodiment ", " another embodiment ", " embodiment " etc., refer to the specific features, structure or the feature that describe in conjunction with this embodiment and be included at least one embodiment of the application's generality description.Multiple place occurs that statement of the same race is not necessarily refer to same embodiment in the description.Furthermore, when describing specific features, structure or a feature in conjunction with any embodiment, what advocate is also fall within the scope of the invention to realize this feature, structure or feature in conjunction with other embodiments.
Although with reference to multiple explanatory embodiment of the present invention, invention has been described here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of, accompanying drawing open in the application and claim, multiple modification and improvement can be carried out to the building block of subject combination layout and/or layout.Except the modification of carrying out building block and/or layout is with except improvement, to those skilled in the art, other purposes also will be obvious.
Claims (8)
1. one kind can specimen holder on self-leveling line face contact type, comprise matrix (1), described matrix (1) is fixed on base plate (11), and one end of described matrix (1) is also flexibly connected with matrix pressing plate (2), it is characterized in that: described matrix (1) and the other end of matrix pressing plate (2) are also provided with locking device, and described matrix (1) forms the first clamping surface (3) with the inner side of matrix pressing plate (2), described clamping surface is also provided with slip-off preventing buckle (4);
Described upper specimen holder also comprises chuck body (5) and fixture pressing plate (6), described chuck body (5) forms the second clamping surface (7) with the lateral surface of fixture pressing plate (6), described second clamping surface (7) is provided with the slip-off preventing bayonet socket (8) matched with described slip-off preventing buckle (4), described chuck body (5) is equipped with arc with the inner side of fixture pressing plate (6) and clamps concave surface (9), the bottom of described chuck body (5) is also provided with leveling semicylinder (10), described leveling semicylinder (10) is for tangent with described base plate (11), and the axis that the axis of described leveling semicylinder (10) and chuck body (5) and fixture pressing plate (6) inside arc clevis hold concave surface (9) intersects.
2. according to claim 1 can specimen holder on self-leveling line face contact type, it is characterized in that: the axis that the axis of described leveling semicylinder (10) and chuck body (5) and fixture pressing plate (6) inside arc clevis hold concave surface (9) is perpendicular.
3. according to claim 1 and 2 can specimen holder on self-leveling line face contact type, it is characterized in that: described leveling semicylinder (10) coincides with the center line of chuck body (5) bottom, and the two ends of described leveling semicylinder (10) flush with the two ends of described chuck body (5) bottom.
4. specimen holder on self-leveling line face contact type according to claim 1, it is characterized in that: the axis of axis and sample that described chuck body (5) and fixture pressing plate (6) inside arc clevis hold concave surface (9) coincides, and described chuck body (5) and fixture pressing plate (6) inside arc clevis hold the longitudinal section radius of concave surface (9), also equal with the radius of longitudinal section, sample holder direction.
5. specimen holder on self-leveling line face contact type according to claim 1, it is characterized in that: described locking device is the first screw (12) that matrix (1) is mutually corresponding with matrix pressing plate (2) end, for matrix (1) and matrix pressing plate (2) being locked by bolt or screw.
6. specimen holder on self-leveling line face contact type according to claim 5, is characterized in that: described matrix (1) is flexibly connected by bearing pin (13) with the end of matrix pressing plate (2).
7. according to claim 1 can specimen holder in self-leveling end surface contact type, it is characterized in that: described base plate (11) is rectangle, and be equipped with the second screw (14) near four angles of described base plate (11), for upper specimen holder is arranged on friction wear testing machine.
8. according to claim 1 can specimen holder in self-leveling end surface contact type, it is characterized in that: described slip-off preventing buckle (4) and slip-off preventing bayonet socket (8) be mutually identical step-like structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410704384.5A CN104406845B (en) | 2014-11-29 | 2014-11-29 | Can specimen holder on self-leveling line face contact type |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410704384.5A CN104406845B (en) | 2014-11-29 | 2014-11-29 | Can specimen holder on self-leveling line face contact type |
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| Publication Number | Publication Date |
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| CN104406845A true CN104406845A (en) | 2015-03-11 |
| CN104406845B CN104406845B (en) | 2017-03-08 |
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| CN201410704384.5A Active CN104406845B (en) | 2014-11-29 | 2014-11-29 | Can specimen holder on self-leveling line face contact type |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110779865A (en) * | 2019-11-04 | 2020-02-11 | 南京航空航天大学 | Clamp for researching face-to-face contact friction working condition |
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| US4888995A (en) * | 1988-11-10 | 1989-12-26 | Curtis John M | Test specimen grip apparatus |
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| CN110779865A (en) * | 2019-11-04 | 2020-02-11 | 南京航空航天大学 | Clamp for researching face-to-face contact friction working condition |
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| CN104406845B (en) | 2017-03-08 |
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Effective date of registration: 20181120 Address after: 211200 Yunhai Building, Lishui District, Nanjing City, Jiangsu Province Patentee after: Nanjing Bio-Insired Intelligent Technology Co., Ltd. Address before: Room B2052, Building B, Building 4, Baixia High-tech Industrial Park, 6 Yongzhi Road, Qinhuai District, Nanjing City, Jiangsu Province, 210000 Patentee before: NANJING HANGHUILI INTELLIGENT TECHNOLOGY CO., LTD. |