CN113155661B - Clamp device for reciprocating frictional wear test and reciprocating frictional wear testing machine - Google Patents
Clamp device for reciprocating frictional wear test and reciprocating frictional wear testing machine Download PDFInfo
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- CN113155661B CN113155661B CN202110502123.5A CN202110502123A CN113155661B CN 113155661 B CN113155661 B CN 113155661B CN 202110502123 A CN202110502123 A CN 202110502123A CN 113155661 B CN113155661 B CN 113155661B
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- 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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- 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
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Abstract
The invention relates to a fixture device for reciprocating frictional wear test and a reciprocating frictional wear testing machine, comprising: the rack is provided with a loading device and a supporting disc, and the supporting disc is used for placing a sample to be tested; a clamp device, the clamp device comprising: the base is used for being fixedly arranged relative to a frame of the reciprocating friction and wear testing machine; the loading column is provided with a sample pin fixing position and is used for fixedly assembling the sample pin, and the loading column is used for bearing axial loading force so as to be propped against a sample to be tested which moves reciprocally by the sample pin to carry out reciprocating friction and wear test; the first clamp and the second clamp are buckled and spliced relatively in the front-back direction to form a guide sliding hole, the guide sliding hole extends vertically and is used for guiding the loading column to slide vertically, and the loading device drives the sample pin to apply axial loading force to the sample to be tested on the supporting disc through the clamp device. When the reciprocating type friction and wear test device is used, the reciprocating type friction and wear test is guaranteed to be normally carried out, and the accuracy of the reciprocating type friction and wear test is improved.
Description
Technical Field
The invention relates to a clamp device for a reciprocating frictional wear test and a reciprocating frictional wear test machine.
Background
Because of rapid development of modern industry, mechanical products develop to large scale, high speed, high load and high automation, requirements on reliability, precision maintenance, service life extension and the like of equipment are higher and higher, most of machine equipment often depends on relative movement of friction pairs among parts of the machine equipment to work, and the relative movement of the friction pairs inevitably generates friction and wear, so that friction and wear performance among the parts is required to be tested, but the friction and wear performance among part bodies is not easy to test, and friction and wear tests are often carried out on friction and wear models through friction and wear testing machines.
The friction and wear can be divided into contact type friction and wear such as balls, pin plates and reciprocating type friction and wear according to different friction pair forms, and the friction and wear test at present mainly researches the friction and wear between various materials and the same grinding surface, and the friction and wear form is usually the friction and wear between the pin plates.
To the pin-disc friction wear test under the high temperature environment, the pin-disc friction wear machine in the prior art generally comprises a frame, a loading driving mechanism is arranged above the frame, a horizontal reciprocating disc is arranged below the frame, a composite material is arranged on the upper surface of the horizontal reciprocating disc, the loading driving mechanism is in jacking contact with a loading column through a pressure sensor so as to downwards apply loading force to the loading column, the loading column can be vertically and vertically movably sleeved in a fixed sliding sleeve, the loading column subjected to the loading force is guided downwards in the fixed sliding sleeve, a sample pin fixed with the loading column is driven to downwards move, the downwards moving sample pin is contacted with the composite material on the horizontal reciprocating disc, and friction wear occurs.
When the reciprocating disc which does high-speed horizontal reciprocating motion drives the composite material to rub with the bottom of the sample pin, a large amount of heat is generated, the heat is upwards transmitted to the loading column from the bottom of the sample pin, the temperature of the loading column is greatly increased, the loading column with higher temperature is subjected to thermal expansion, a blocking phenomenon is easily generated between the expanded loading column and the fixed sliding sleeve, the loading effect of the loading driving mechanism above the loading column is weakened, the loading force is not easily transmitted to the sample pin, the test result of friction and abrasion is not accurate enough, and the excessive expansion loading column is possibly locked with the fixed sliding sleeve and is not easy to detach, and the fixed sliding sleeve and the sample are directly scrapped when serious.
Disclosure of Invention
The invention aims to provide a fixture device for a reciprocating friction and wear test, which solves the technical problem that in the prior art, a loading column is easy to generate blocking with a fixed sliding sleeve due to thermal expansion, so that the loading effect is poor. The invention also provides a reciprocating frictional wear testing machine, which is used for solving the technical problem that in the prior art, frictional wear testing results are not accurate enough due to the fact that a loading column is easy to generate blocking with a fixed sliding sleeve after being heated and expanded.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows: a reciprocating frictional wear test fixture apparatus comprising:
the base is used for being fixedly arranged relative to a frame of the reciprocating friction and wear testing machine;
the loading column is provided with a sample pin fixing position and is used for fixedly assembling the sample pin, and the loading column is used for bearing axial loading force so as to be propped against a sample to be tested which moves reciprocally by the sample pin to carry out a reciprocating friction and wear test;
the first clamp and the second clamp are buckled and spliced relatively in the front-back direction to form a guide sliding hole, and the guide sliding hole extends vertically and is used for guiding the loading column to slide in a guide manner vertically;
the first clamp and the second clamp are detachably assembled together through a fastening bolt, and the fastening bolt extends along the front-rear direction so as to adjust the buckling tightness of the first clamp and the second clamp by adjusting the screwing degree of the fastening bolt;
the first clamp and the second clamp form a clamp assembly by the fastening bolt, and the clamp assembly is fixed on the base.
The beneficial effects are that: according to the clamp device for the reciprocating type friction and wear test, the first clamp and the second clamp are spliced together through the fastening bolts so as to form the guide sliding holes for guiding and sliding of the loading column, normal guiding of the loading column and the sample pin is guaranteed, when the loading column is blocked due to thermal expansion, the tightness of the clamp device can be adjusted through unscrewing one or half of the fastening bolts, namely the first clamp and the second clamp are away from each other, the distance is enlarged, the loading column can be effectively guaranteed to always slide along vertical guide in the guide sliding holes under the condition of eliminating the blocking problem, normal running of the reciprocating type friction and wear test is guaranteed, and the accuracy of the reciprocating type friction and wear test is improved.
As a further improvement, the first clamp is a fixing clamp, the fixing clamp is fixedly arranged on the base, the second clamp is a detachable clamp, and the detachable clamp is in buckling and splicing with the fixing clamp through the fastening bolt.
The beneficial effects are that: the detachable clamp is buckled and spliced with the fixed clamp through the fastening bolt, so that the detachable clamp is convenient to install.
As a further improvement, the fixing clamp is a fixing clamp block, the fixing clamp block is integrally or separately arranged on the base, a first half groove vertically penetrating through the fixing clamp block is formed in the fixing clamp block, the detachable clamp is a detachable clamp block, the detachable clamp block is spliced with the fixing clamp block through the fastening bolt, a second half groove vertically penetrating through the detachable clamp block is formed in the detachable clamp block, and the first half groove and the second half groove are matched to form the guide sliding hole when the fixing clamp block is buckled with the detachable clamp block. .
The beneficial effects are that: the first half groove on the fixed clamping block and the second half groove on the detachable clamping block are opposite to each other to form a complete guide sliding hole for the guide sliding of the loading column, and the processing is convenient.
As a further improvement, the left side and the right side of the first half groove on the fixed clamping block are respectively provided with a first bolt mounting hole, the left side and the right side of the second half groove on the detachable clamping block are respectively provided with a second bolt mounting hole, and the first bolt mounting hole and the second bolt mounting hole correspondingly penetrate through so as to penetrate through the fastening bolt.
The beneficial effects are that: the fixing clamp splice and the detachable clamp splice are paired and spliced through the fastening bolts, the installation is convenient, and the tightness of the splicing between the detachable clamp and the fixing clamp splice can be adjusted through unscrewing the fastening bolts.
As a further improvement, an inserting and positioning structure is arranged between the fixed clamping block and the detachable clamping block, the inserting and positioning structure is distributed with at least two parts, each inserting and positioning structure comprises a positioning column and a positioning hole, one of the positioning column and the positioning hole which are matched for use is arranged on the fixed clamping block, and the other is arranged on the detachable clamping block.
The beneficial effects are that: the fixed clamping blocks and the detachable clamping blocks are matched through the positioning columns and the positioning holes in an inserting and assembling mode, and the installation is convenient.
As a further improvement, the fixing clamp comprises a first clamping block and a fixing half-shell, the fixing half-shell is integrally or separately fixed on the base, the detachable clamp comprises a second clamping block and a detachable half-shell, the fixing half-shell and the detachable half-shell are buckled and spliced in the front-back direction to form a sleeve, the sleeve is fixedly assembled through the fastening bolt, and the first clamping block and the second clamping block are positioned in the sleeve and are clamped by the sleeve to form the guide sliding hole in a spliced manner in opposite directions.
The beneficial effects are that: the fixed clamp and the detachable clamp are arranged in a split mode, and the first clamping block and the second clamping block can be made of materials which are favorable for loading force transmission.
As a further improvement, the first clamping block and the second clamping block are arranged along the front-rear direction, the first clamping block is positioned in the fixed half shell, the first clamping block is matched with the fixed half shell in the front-rear direction in a matched manner, and the second clamping block is matched with the detachable half shell in the front-rear direction in a matched manner.
The beneficial effects are that: the first clamping block is inserted with the fixed half shell along the front-back direction, and the second clamping block is inserted with the detachable half shell along the front-back direction, so that the installation is convenient.
As a further improvement, the guide sliding hole formed by the first clamping block and the second clamping block is arranged opposite to the center of the clamp assembly or is eccentrically arranged relative to the center of the clamp assembly.
The beneficial effects are that: the first clamping block and the second clamping block are eccentrically arranged relative to the center of the clamp assembly, and the formed guide sliding holes are convenient to process.
The technical scheme of the reciprocating frictional wear testing machine provided by the invention is as follows: a reciprocating frictional wear testing machine comprising:
the rack is provided with a loading device, a supporting disc and a clamp device;
the supporting disc is used for placing a sample to be tested;
the clamp device is used for installing a sample pin;
the loading device drives the sample pin to downwards apply axial loading force to the sample to be tested on the supporting disc through the clamp device;
the clamp device includes:
the base is used for being fixedly arranged relative to a frame of the reciprocating friction and wear testing machine;
the loading column is provided with a sample pin fixing position and is used for fixedly assembling the sample pin, and the loading column is used for bearing axial loading force so as to be propped against a sample to be tested which moves reciprocally by the sample pin to carry out a reciprocating friction and wear test;
the first clamp and the second clamp are buckled and spliced relatively in the front-back direction to form a guide sliding hole, and the guide sliding hole extends vertically and is used for guiding the loading column to slide in a guide manner vertically;
the first clamp and the second clamp are detachably assembled together through a fastening bolt, and the fastening bolt extends along the front-rear direction so as to adjust the buckling tightness of the first clamp and the second clamp by adjusting the screwing degree of the fastening bolt;
the first clamp and the second clamp form a clamp assembly by the fastening bolt, and the clamp assembly is fixed on the base.
The beneficial effects are that: according to the reciprocating frictional wear testing machine provided by the invention, the detachable clamp and the fixed clamp are spliced together through the fastening bolt so as to form the guide sliding hole for guiding and sliding the loading column, the normal guiding of the loading column and the sample pin is ensured, when the loading column is heated and expanded, whether the loading column is blocked in the guide sliding hole or not can be judged through the indication on the pressure sensor, if the indication stops changing, the blocking of the loading column is indicated, the tightness of the clamp device can be regulated through unscrewing one or half of the fastening bolt, namely, the first clamp and the second clamp are away from each other, the distance is enlarged, the loading column can always slide along the vertical guide in the guide sliding hole under the condition of eliminating the blocking problem, the normal running of the reciprocating frictional wear test is ensured, and the accuracy of the reciprocating frictional wear test is improved.
As a further refinement, the loading device has a loading output, on which a loading wheel is mounted, the top end of the loading column of the clamping device being provided with a loading cap, against which the loading wheel bears in order to transmit a corresponding axial loading force to the loading column.
The beneficial effects are that: the loading wheel at the output end of the loading device applies axial loading force to the loading column through the loading cover, so that the loading force can be uniformly transferred to the loading column.
As a further improvement, the first clamp is a fixing clamp, the fixing clamp is fixedly arranged on the base, the second clamp is a detachable clamp, and the detachable clamp is in buckling and splicing with the fixing clamp through the fastening bolt.
The beneficial effects are that: the detachable clamp is buckled and spliced with the fixed clamp through the fastening bolt, so that the detachable clamp is convenient to install.
As a further improvement, the fixing clamp is a fixing clamp block, the fixing clamp block is integrally or separately arranged on the base, a first half groove vertically penetrating through the fixing clamp block is formed in the fixing clamp block, the detachable clamp is a detachable clamp block, the detachable clamp block is spliced with the fixing clamp block through the fastening bolt, a second half groove vertically penetrating through the detachable clamp block is formed in the detachable clamp block, and the first half groove and the second half groove are matched to form the guide sliding hole when the fixing clamp block is buckled with the detachable clamp block. .
The beneficial effects are that: the first half groove on the fixed clamping block and the second half groove on the detachable clamping block are opposite to each other to form a complete guide sliding hole for the guide sliding of the loading column, and the processing is convenient.
As a further improvement, the left side and the right side of the first half groove on the fixed clamping block are respectively provided with a first bolt mounting hole, the left side and the right side of the second half groove on the detachable clamping block are respectively provided with a second bolt mounting hole, and the first bolt mounting hole and the second bolt mounting hole correspondingly penetrate through so as to penetrate through the fastening bolt.
The beneficial effects are that: the fixing clamp splice and the detachable clamp splice are paired and spliced through the fastening bolts, the installation is convenient, and the tightness of the splicing between the detachable clamp splice and the fixing clamp splice can be adjusted through unscrewing the fastening bolts.
As a further improvement, an inserting and positioning structure is arranged between the fixed clamping block and the detachable clamping block, the inserting and positioning structure is distributed with at least two parts, each inserting and positioning structure comprises a positioning column and a positioning hole, one of the positioning column and the positioning hole which are matched for use is arranged on the fixed clamping block, and the other is arranged on the detachable clamping block.
The beneficial effects are that: the fixed clamping blocks and the detachable clamping blocks are matched through the positioning columns and the positioning holes in an inserting and assembling mode, and the installation is convenient.
As a further improvement, the fixing clamp comprises a first clamping block and a fixing half-shell, the fixing half-shell is integrally or separately fixed on the base, the detachable clamp comprises a second clamping block and a detachable half-shell, the fixing half-shell and the detachable half-shell are buckled and spliced in the front-back direction to form a sleeve, the sleeve is fixedly assembled through the fastening bolt, and the first clamping block and the second clamping block are positioned in the sleeve and are clamped by the sleeve to form the guide sliding hole in a spliced manner in opposite directions.
The beneficial effects are that: the fixed clamp and the detachable clamp are arranged in a split mode, and the first clamping block and the second clamping block can be made of materials which are favorable for loading force transmission.
As a further improvement, the first clamping block and the second clamping block are arranged along the front-rear direction, the first clamping block is positioned in the fixed half shell, the first clamping block is matched with the fixed half shell in the front-rear direction in a matched manner, and the second clamping block is matched with the detachable half shell in the front-rear direction in a matched manner.
The beneficial effects are that: the first clamping block is inserted with the fixed half shell along the front-back direction, and the second clamping block is inserted with the detachable half shell along the front-back direction, so that the installation is convenient.
As a further improvement, the guide sliding hole formed by the first clamping block and the second clamping block is arranged opposite to the center of the clamp assembly or is eccentrically arranged relative to the center of the clamp assembly.
The beneficial effects are that: the first clamping block and the second clamping block are eccentrically arranged relative to the center of the clamp assembly, and the formed guide sliding holes are convenient to process.
Drawings
FIG. 1 is an assembly schematic view of a reciprocating frictional wear machine (fixture device not shown) provided by the present invention;
FIG. 2 is a schematic diagram illustrating an assembly of a loading device and a clamping device for use in the wearing machine of FIG. 1 according to the present invention;
FIG. 3 is a left side view of FIG. 2;
FIG. 4 is a top view of FIG. 2;
FIG. 5 is a schematic view of the structure of the fixing clamp block in FIG. 4;
FIG. 6 is a left side view of FIG. 5;
FIG. 7 is a top view of FIG. 5;
FIG. 8 is a schematic view of the removable clamp block of FIG. 4;
FIG. 9 is a right side view of FIG. 8;
FIG. 10 is a top view of FIG. 8;
FIG. 11 is a schematic view showing the structure of a jig device in embodiment 2 of the reciprocating frictional wear testing machine;
fig. 12 is a schematic view showing a partial structure of a clamp device in embodiment 3 of the reciprocating frictional wear testing machine.
Reference numerals illustrate:
1. a frame; 2. a loading device; 21. a loading cylinder; 22. a pressure sensor; 23. a loading wheel; 3. a clamp device; 31. a base; 32. fixing the clamping blocks; 321. a first half-groove; 322. a first bolt mounting hole; 323. positioning columns; 33. a detachable clamping block; 331. a second half-groove; 332. a second bolt mounting hole; 333. positioning holes; 34. a fastening bolt; 35. loading a column; 351. a guide groove; 4. a support plate; 5. loading a cover; 6. fixing the half shell; 7. a first clamping block; 71. a first guide groove; 72. a first protruding guide block; 8. a removable half-shell; 9. a second clamping block; 91. a second guide groove; 92. a second protruding guide block; 10. a guide sliding hole; 11. and (5) hooping the sleeve.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the particular embodiments described herein are illustrative only and are not intended to limit the invention, i.e., the embodiments described are merely some, but not all, of the embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
It is noted that relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" is not intended to exclude processes, methods comprising such element.
In the description of the present invention, the terms "mounted," "connected," "coupled," and "connected," as may be used broadly, and may be connected, for example, fixedly, detachably, or integrally, unless otherwise specifically defined and limited; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.
In the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the term "provided" may be interpreted broadly, and for example, an object "provided" may be a part of a body, may be separately disposed from the body, and may be connected to the body, where the connection may be a detachable connection or an undetachable connection. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.
The present invention is described in further detail below with reference to examples.
The invention provides a concrete embodiment 1 of a reciprocating friction and wear testing machine, which comprises the following steps:
the reciprocating frictional wear testing machine provided by the invention is designed into a split semi-detachable clamp device, and the fastening tightness of the splicing of the clamp device can be adjusted through fastening bolts so as to ensure that the loading column can always slide along vertical guidance in a guiding sliding hole of the clamp device.
As shown in fig. 1 to 12, the reciprocating frictional wear testing machine comprises a frame 1, a loading device 2 is arranged on the frame 1, a fixture device 3 is arranged below the loading device 2, a loading wheel 23 serving as an output end of the loading device 2 transmits loading force to the fixture device 3 through a loading cover 5, a supporting disc 4 is further arranged on the frame 1, the supporting disc 4 is used for placing a sample to be tested, and the whole is located below the fixture device 3.
As shown in fig. 1, the frame 1 is vertically placed on a horizontal plane to ensure the stability of the whole testing machine, the upper end of the frame 1 is provided with a loading device 2, the loading device 2 comprises a loading cylinder 21, the loading cylinder 21 is positioned at the upper side of the loading device 2, a loading wheel 23 is arranged below the loading cylinder 21, the loading wheel 23 and the loading cylinder 21 are fixedly assembled to apply axial loading force as the output end of the loading device 2, a positive pressure sensor 22 is arranged between the loading wheel 23 and the loading cylinder 21, the positive pressure sensor 22 is used for monitoring the positive pressure of the loading device 2 to the clamp device 3 in real time during the working of the testing machine so as to judge whether a clamping phenomenon occurs in the guide sliding hole 10 of the loading column 35, and further, the tightness of buckling and splicing between the fixed clamping block 32 and the detachable clamping block 33 is timely adjusted.
As shown in fig. 2 to 4, a loading cover 5 is disposed below the loading wheel 23, and an opening diameter of the loading cover 5 for being sleeved on the upper end of the loading column 35 is slightly larger than that of the loading column, so that the loading cover 5 is convenient to stably sleeve the top end of the loading column 35, and the loading force applied by the loading wheel 23 is uniformly transmitted to the loading column 35 by the loading cover 5, so that the loading column 35 is prevented from being skewed after being subjected to the loading force.
Here, the loading column 35 is provided with a mounting hole at the center, a sample pin can be inserted into the mounting hole, a plurality of screw mounting holes can be provided on the side surface of the filling column, and a set screw is mounted in the screw mounting hole to fix the sample pin in the loading column 35.
The fixture device 3 comprises a fixture assembly, the fixture assembly comprises a base 31, the base 31 is fixedly assembled with the machine frame 1 of the testing machine, so that the fixture on the base 31 and the machine frame 1 are prevented from sliding relatively, and the accuracy of the friction and wear test result is affected.
The base 31 is provided with a fixed clamp, as shown in fig. 5 to 7, the fixed clamp is in a block structure to form a fixed clamping block 32, the fixed clamping block 32 is provided with a first half groove 321, the first half groove 321 is vertically communicated and is arranged on the front side surface of the fixed clamping block 32 for guiding and placing of the loading column 35; the left and right sides of first half groove 321 is equipped with first bolt mounting hole 322, and first bolt mounting hole 322 is equipped with four according to actual demand, and four first bolt mounting holes 322 all set up on the leading flank of fixed clamp splice 32, and two are two to one set of distribution in the both sides of first half groove 321, extend along the fore-and-aft direction to correspond with each second bolt mounting hole 332 and link up.
Positioning columns 323 are further arranged between the first bolt mounting holes of each group, each positioning column 323 extends along the front-rear direction and is arranged on the front side surface of the fixed clamping block 32, and the length of each positioning column 323 is smaller than the width of the detachable clamping block 33 in the front-rear direction so as to be correspondingly inserted with each positioning hole 333.
As shown in fig. 8 to 10, the detachable clamp is in a block structure, a detachable clamp block 33 is formed, a second half groove 331 is arranged on the detachable clamp block 33, the second half groove 331 is vertically penetrated and arranged on the rear side surface of the detachable clamp block 33, and a complete guiding sliding hole 10 is formed by matching and splicing the first half groove 321, so that a loading column 35 slides along the vertical guiding; the left and right sides of second half slot 331 is equipped with second bolt mounting hole 332, second bolt mounting hole 332 is equipped with four according to actual demand, four second bolt mounting holes 332 all set up on the trailing flank of detachable clamp block 33, two are a set of distribution in the both sides of second half slot 331, extend along the fore-and-aft direction, with link up with each first bolt mounting hole 322 correspondence, splice fixed clamp block 32 and detachable clamp block 33 through cartridge fastening bolt 34 tightly, and the elasticity of clamp device 3 is adjusted to the round or the half circle of accessible unscrew fastening bolt 34, namely make fixed clamp block 32 and detachable clamp block 33 keep away from mutually, enlarge the interval, under the condition of eliminating the jam problem, effectively guarantee that loading post 35 can follow vertical direction slip all the time in guide sliding hole 10.
Positioning holes 333 are further arranged between the second bolt mounting holes 332, the positioning holes 333 extend along the front-back direction, and the length of each positioning hole 333 is matched with the length of each positioning column 323 so as to guide and insert each positioning column 323.
The fixture device 3 further comprises a loading column 35, the diameter of the loading column 35 is slightly smaller than that of the guide sliding hole 10 so as to be capable of sliding along the vertical guide in the guide sliding hole 10, a round hole is formed in the center of the loading column 35, and the round hole is vertically communicated for the sample pin to be inserted and fixed.
As shown in fig. 1, a supporting plate 4 is arranged below the fixture device 3, the supporting plate 4 is movably mounted on the frame 1, the upper surface of the supporting plate 4 is used for placing a sample to be tested, a driving mechanism is arranged below the supporting plate 4 and is in transmission connection with the supporting plate 4 so as to drive the supporting plate 4 to do high-speed reciprocating motion in the horizontal direction, so that the sample to be tested does high-speed reciprocating motion along with the supporting plate 4 to generate friction and abrasion with the bottom of a sample pin.
When the reciprocating frictional wear testing machine provided by the invention is used for frictional wear testing, a sample to be tested is fixedly placed on the upper surface of the supporting disc 4, the base of the clamp device 3 is fixedly installed on the frame 1, the pair of detachable clamping blocks 33 and the fixed clamping blocks 32 are spliced, so that the positioning columns 323 on the fixed clamping blocks 32 are correspondingly inserted into the positioning holes 333 of the detachable clamping blocks 33, then the fastening bolts 34 are inserted into the corresponding through bolt mounting holes, the fastening bolts 34 are screwed, so that the pair of detachable clamping blocks 33 and the fixed clamping blocks 32 are spliced, the first half groove 321 and the second half groove 331 form the guide sliding holes 10, then the sample pins are inserted and fixed in the round holes of the loading columns 35, the bottoms of the sample pins extend out of the round holes, finally the loading columns 35 are guided and placed in the guide sliding holes 10, the loading covers 5 are covered on the tops of the loading columns 35, and the driving mechanisms of the loading cylinders 21 and the supporting disc 4 are started.
The loading cylinder 21 descends to push the loading wheel 23 to descend, the descending loading wheel 23 downwards presses the loading cover 5, loading force is transmitted to the loading column 35 through the loading cover 5, the loading column 35 slides downwards in the guide sliding hole 10 after being loaded, the sample pin extending out of the bottom of the loading column 35 is driven to descend, the bottom of the sample pin is enabled to be in contact with a sample to be tested, axial loading force is applied to the sample to be tested, a large amount of heat is generated when the support disc 4 which moves horizontally and reciprocally at a high speed drives the sample to be tested to rub against the bottom of the sample pin, the heat is transmitted to the loading column from the bottom of the sample pin upwards, the temperature of the loading column is greatly increased, and the loading column 35 with higher temperature is subject to thermal expansion; if the pressure value displayed by the positive pressure sensor stops changing, it indicates that the expanded loading column 35 is blocked in the guide sliding hole 10, and the fastening tightness between the detachable clamping block 33 and the fixed clamping block 32 can be adjusted by unscrewing one or half of the fastening bolt, so that the loading column 35 can always slide along the vertical guide in the guide sliding hole 10, and further the normal running of the friction and wear test is ensured.
The clamp device of the reciprocating frictional wear testing machine provided by the invention is detachable, and when the loading column is heated and expanded to cause blocking, the tightness of the clamp device can be adjusted by unscrewing one or half of the fastening bolt, so that the loading column can always slide along the vertical direction in the guide sliding hole, the normal running of the reciprocating frictional wear testing is ensured, and the accuracy of the reciprocating frictional wear testing is improved.
The sample pin mounted on the loading column may be a sample material, and in this case, it forms a pair of paired friction pairs with the sample on the sample tray. Of course, in other embodiments, the sample pins may be used only to detect the material properties of the sample disk, corresponding to different friction pair materials, where the sample pins are used only as loading devices, the materials of which are different from the sample materials.
The invention provides a concrete example 2 of a reciprocating frictional wear testing machine, which comprises the following steps:
it differs from embodiment 1 mainly in the structure of the clamp device:
in embodiment 1, the outer peripheral surface of the loading column 35 is of a smooth structure, the fixing clamp and the detachable clamp are all integrally arranged, in this embodiment, two guide grooves 351 extending vertically are symmetrically formed in the outer peripheral surface of the loading column 35, and the fixing clamp and the detachable clamp are all arranged in a split manner.
As shown in fig. 11, the fixing jig includes a first clamp block 7 and a fixing half-shell 6, the first clamp block 7 being inserted in the fixing half-shell 6 in the front-rear direction. The first clamping block 7 is provided with a first guide groove 71, the first guide groove 71 is vertically penetrated and arranged on the front side surface of the first clamping block 7 so as to be paired with the second guide groove 91 and form a complete guide sliding hole 10, a first protruding guide block 72 is arranged in the first guide groove 71, and the first protruding guide block 72 vertically extends and is arranged in the first guide groove 71 so as to be fittingly inserted into one of the guide grooves 351 on the outer peripheral surface of the loading column 35.
The detachable clamp comprises a second clamping block 9 and a detachable half shell 8, wherein the second clamping block 9 is inserted into the detachable half shell 8 in the front-back direction, a second guide groove 91 is arranged on the second clamping block 9, and the second guide groove 91 is vertically communicated and is arranged on the rear side face of the second clamping block 9. The second guide groove 91 is provided with a second protruding guide block 92, the second protruding guide block 92 extends vertically and is arranged in the second guide groove 91 so as to be inserted into one of the guide grooves 351 on the outer peripheral surface of the loading post 35, and the second guide groove 91 is opposite to the first guide groove 71 and forms a complete guide sliding hole 10 so as to enable the loading post 35 to slide into the guide sliding hole 10 in a guide manner.
The fixed half shell 6 and the detachable half shell 8 are aligned and spliced in the front-rear direction, wherein the whole of the detachable half shell 8 in the front-rear direction is smaller than that of the fixed half shell 6, the detachable half shell 8 is arranged at the front side of the fixed half shell 6, a ferrule 11 is formed by adopting the splicing mode and splicing in the embodiment 1, the ferrule 11 is used for aligning and inserting the first clamping block 7 and the second clamping block 9, a complete guiding sliding hole 10 is formed in the ferrule 11, and the guiding sliding hole 10 is eccentrically arranged relative to the center of the ferrule 11 so as to enable the loading column 35 to vertically slide in the guiding sliding hole 10.
The invention provides a concrete embodiment 3 of a reciprocating friction and wear testing machine, which comprises the following steps:
the differences from example 2 are mainly that: in embodiment 2, the first and second pairs of clamping blocks and the formed guide sliding hole are arranged eccentrically with respect to the center of the ferrule. In this embodiment, as shown in fig. 12, the pair of first and second clamp blocks 7 and 9 and the formed guide sliding hole 10 are disposed opposite to the center of the ferrule 11 so that the loading post 35 can receive a more uniform axial loading force.
The invention provides a concrete embodiment 4 of a reciprocating frictional wear testing machine, which comprises the following steps:
the main difference from the embodiment 1 is that. In embodiment 1, the fixed clamping block is integrally provided with the base to form a clamp assembly with the detachable clamping block. In this embodiment, be equipped with the bolt mounting hole on the trailing flank of fixed clamp splice, the base is close to the position of fixed clamp splice and is equipped with the fixed plate, and the fixed plate sets up with the base is integrative, is equipped with the bolt mounting hole on the fixed plate, and the bolt mounting hole on the fixed plate corresponds to link up with the bolt mounting hole on the fixed clamp splice trailing flank, assembles fixed clamp splice and fixed plate together through cartridge fastening bolt to fix fixed clamp splice on the base, with form the anchor clamps subassembly jointly with detachable clamp splice.
The invention provides a concrete example 5 of a reciprocating frictional wear testing machine, which comprises the following steps:
the difference between the embodiment 1 and the embodiment 1 is that in the embodiment 1, the top end of the loading column is sleeved with the loading cover, the loading device transmits the loading force to the loading column through the loading wheel at the output end of the loading device, so that the loading force received by the top end of the loading column is uniform.
The invention also provides an embodiment of the fixture device for reciprocating frictional wear test:
the structure of the jig device for the reciprocating frictional wear test in this embodiment is the same as that of the jig device for the reciprocating frictional wear test in the above-described embodiment 1 of the reciprocating frictional wear testing machine, and will not be described again.
Of course, in other embodiments, the reciprocating frictional wear testing fixture device may be the structure of the reciprocating frictional wear testing fixture device in any one of embodiments 2 to 5 of the reciprocating frictional wear testing machine, and will not be described herein.
It should be noted that the above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, but may be modified without inventive effort or equivalent substitution of some technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A reciprocating frictional wear test fixture apparatus comprising:
a base (31) for fixed arrangement relative to a frame (1) of the reciprocating frictional wear testing machine;
the loading column (35) is provided with a sample pin fixing position for fixing and assembling the sample pin, and the loading column (35) is used for bearing axial loading force so as to be propped against a sample to be tested which moves reciprocally by the sample pin for carrying out a reciprocating friction and wear test;
the fixture device is characterized in that the fixture device further comprises:
the first clamp and the second clamp are buckled and spliced relatively in the front-back direction to form a guide sliding hole (10), and the guide sliding hole (10) extends vertically and is used for guiding the loading column (35) to slide vertically;
the first clamp and the second clamp are detachably assembled together through a fastening bolt (34), and the fastening bolt (34) extends along the front-back direction so as to adjust the buckling tightness of the first clamp and the second clamp by adjusting the screwing degree of the fastening bolt (34);
the first and second clamps form a clamp assembly by the fastening bolt (34), which is fixed to the base (31).
2. The fixture device for the reciprocating frictional wear test according to claim 1, wherein the first fixture is a fixing fixture fixedly arranged on the base (31), and the second fixture is a detachable fixture which is buckled and spliced with the fixing fixture through the fastening bolt (34).
3. The fixture device for the reciprocating frictional wear test according to claim 2, wherein the fixing fixture is a fixing clamp block (32), the fixing clamp block (32) is integrally or separately arranged on the base (31), a first half groove (321) which is vertically penetrated is formed in the fixing clamp block (32), the detachable fixture is a detachable clamp block (33), the detachable clamp block (33) is buckled and spliced with the fixing clamp block (32) through the fastening bolt (34), the detachable clamp block (33) is provided with a second half groove (331) which is vertically penetrated, and the first half groove (321) and the second half groove (331) are matched to form the guide sliding hole (10) when the fixing clamp block (32) and the detachable clamp block (33) are buckled.
4. The fixture device for the reciprocating frictional wear test according to claim 3, wherein the fixed clamping block (32) is provided with first bolt mounting holes (322) on the left and right sides of the first half groove (321), the detachable clamping block (33) is provided with second bolt mounting holes (332) on the left and right sides of the second half groove (331), and the first bolt mounting holes (322) and the second bolt mounting holes (332) are correspondingly penetrated so as to pass through the fastening bolts (34).
5. The fixture device for the reciprocating frictional wear test as claimed in claim 4, wherein a plugging positioning structure is arranged between the fixed clamping block (32) and the detachable clamping block (33), the plugging positioning structure is distributed with at least two parts, each plugging positioning structure comprises a positioning column (323) and a positioning hole (333), one of the positioning column (323) and the positioning hole (333) which are matched with each other is arranged on the fixed clamping block (32), and the other is arranged on the detachable clamping block (33).
6. The fixture device for the reciprocating frictional wear test according to claim 2, wherein the fixing fixture comprises a first clamping block (7) and a fixing half-shell (6), the fixing half-shell (6) is integrally or separately fixedly arranged on the base (31), the detachable fixture comprises a second clamping block (9) and a detachable half-shell (8), the fixing half-shell (6) and the detachable half-shell (8) are buckled and spliced in the front-back direction to form a ferrule (11), the ferrule (11) is fixedly assembled through the fastening bolt (34), and the first clamping block (7) and the second clamping block (9) are positioned in the ferrule (11) and are clamped by the ferrule (11) to be spliced in the opposite direction to form the guide sliding hole (10).
7. The jig device for a reciprocating frictional wear test according to claim 6, characterized in that the first clamping block (7) and the second clamping block (9) are arranged in the front-rear direction, the first clamping block (7) is located in the fixed half-shell (6), the first clamping block (7) is fitted and fitted with the fixed half-shell (6) in the front-rear direction, and the second clamping block (9) is fitted and fitted with the detachable half-shell (8) in the front-rear direction.
8. The clamp device for the reciprocating frictional wear test as claimed in claim 6 or 7, characterized in that the guide sliding hole (10) formed by the first clamp block (7) and the second clamp block (9) is arranged opposite to the center of the clamp assembly or is arranged eccentrically with respect to the center of the clamp assembly.
9. A reciprocating frictional wear testing machine comprising:
the device comprises a frame (1), wherein a loading device (2), a supporting disc (4) and a clamp device (3) are arranged on the frame (1);
the supporting disc (4) is used for placing a sample to be tested;
the clamp device (3) is used for installing a sample pin;
the loading device (2) drives the sample pin to downwards apply axial loading force to the sample to be tested on the supporting disc (4) through the clamp device (3);
it is characterized in that the method comprises the steps of,
the jig device (3) employs the jig device for a reciprocating frictional wear test as defined in any one of claims 1 to 8.
10. The reciprocating frictional wear testing machine as set forth in claim 9, characterized in that the loading device (2) has a loading output to which a loading wheel (23) is mounted, the top end of the loading column (35) of the clamp device (3) being provided with a loading cap (5), the loading wheel (23) being pressed against the loading cap (5) to transmit a corresponding axial loading force onto the loading column (35).
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| CN202110502123.5A CN113155661B (en) | 2021-05-08 | 2021-05-08 | Clamp device for reciprocating frictional wear test and reciprocating frictional wear testing machine |
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| CN202110502123.5A CN113155661B (en) | 2021-05-08 | 2021-05-08 | Clamp device for reciprocating frictional wear test and reciprocating frictional wear testing machine |
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| CN113155661A CN113155661A (en) | 2021-07-23 |
| CN113155661B true CN113155661B (en) | 2024-02-27 |
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| CN113959880B (en) * | 2021-10-11 | 2024-03-19 | 中国航发沈阳发动机研究所 | Turbine blade shroud engagement surface friction and wear performance test system and method |
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