CN102305748A - Frictional abrasion tester used for abrasion in-site measurement - Google Patents
Frictional abrasion tester used for abrasion in-site measurement Download PDFInfo
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- CN102305748A CN102305748A CN201110219851A CN201110219851A CN102305748A CN 102305748 A CN102305748 A CN 102305748A CN 201110219851 A CN201110219851 A CN 201110219851A CN 201110219851 A CN201110219851 A CN 201110219851A CN 102305748 A CN102305748 A CN 102305748A
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Abstract
The invention discloses a frictional abrasion tester used for abrasion in-site measurement. The frictional abrasion tester comprises a frictional abrasion measuring device arranged on an experimental platform, an abrasion in site measuring device arranged on the experimental platform and a lubricating device arranged on the experimental platform. By utilizing the frictional abrasion tester disclosed by the invention, the problem of non-dismounted abrasion continuous and in-site measurement is solved; friction coefficient, abrasion shape and relative abrasion amount of a test sample in the whole test can be obtained by virtue of a test, thus the performance of materials in the long-period frictional abrasion process is evaluated.
Description
Technical field
The invention belongs to the rubbing wear measurement mechanism, through the revolution relative motion, material is joined secondary friction factor, wear extent and wear surface image, the friction and wear behavior of evaluating material under the acquisition setting operating mode.
Background technology
Friction wear testing machine is a kind of through measuring friction factor and wear extent, the device of evaluation friction pair friction and wear behavior.Friction factor is usually by the friction wear testing machine on-line measurement, and wear extent adopts off-line measurement.
The tribological property of evaluation material then requires under various working (as: Different Lubrication Conditions Used and lubricant medium), to experimentize comprehensively, draws friction factor and the wear extent of material under different operating modes.And friction wear testing machine generally can only be done the frictional wear experiment of single operating mode.
The friction factor of the different wear stages of continuous coverage is extremely important for the tribological property of evaluating material with the wearing and tearing relative quantity.Present testing machine can be realized the online acquisition of friction factor mostly, and off-line method is adopted in the measurement of wear extent usually.The greatest problem of off-line measurement is that the dismounting meeting of sample causes measuring the front and back polishing scratch and can't coincide, thereby has changed the continuity of operating condition of test.The minority testing machine also adopts in-situ measuring method, but adopts expensive polishing scratch cross section scanning device usually, as; The pattern appearance obtains two-dimensional curve, thus the approximate wear extent that obtains; But because the uncontinuity of polishing scratch adopts partial cross section's two-dimensional curve to be difficult to reflect the overall wear situation.For this reason, a kind of friction wear testing machine of polishing scratch in site measurement of realizing of invention has great importance.
Summary of the invention
To the problem that current friction wear testing machine exists, the object of the present invention is to provide a kind of friction wear testing machine of the in site measurement of wearing and tearing, under unlubricated or different medium lubricating condition, carry out multiple friction and join secondary frictional wear experiment; A kind of robotization wear extent in-situ measurement device based on digital picture is provided, and emphasis has solved continuous, the in site measurement problem of wearing and tearing of no dismounting; Obtain friction factor, wear morphology, the wearing and tearing relative quantity of sample in entire test through test, thus the performance of evaluating material in the long period process of friction and wear.
Technical scheme of the present invention is achieved in that
A kind of friction and wear test machine of the in site measurement of wearing and tearing comprises:
Be arranged at the rubbing wear measurement mechanism on the experiment table, be arranged at the wearing and tearing in-situ measurement device on the experiment table, be arranged at the lubricating system on the experiment table.
Said fretting wear measurement mechanism comprises: be located at the rotation platform on the experimental bench; Following sample is fixed on the rotation platform by dog screw; The strain shaft bar is fixed on the experimental bench by four screws; The strain bar is fixed on the back shaft by the shaft shoulder of hold-down nut and back shaft; Back shaft passes through bearings by the strain shaft bar; Last sample is fixed in the anchor clamps; Anchor clamps and scale pan are fixed in strain bar front end by thread connection; The strain rod rear end is provided with balance weight; Balance weight and strain bar are by being threaded, and measuring up and down, the sensor of sample frictional force is arranged on the strain bar.
Said wearing and tearing in-situ measurement device comprises: the magnet base that is adsorbed on the experiment table through magnetic force is positioned at the rotation platform right side; The micrometric displacement platform is fixed on the magnet base; Through the USB digital microscope of screw retention in micrometric displacement platform external part, the camera of its front end is positioned at following sample top and aims at the polishing scratch of friction pair.
Said lubricating system comprises: swab case, oil sump and pump pass through screw retention respectively on experiment table; Oil outlet and tubing sub are fixed on the experiment table through thread connection; Be positioned at the rotation platform left side, oil pipe connects oil sump, pump, oil outlet, swab case formation oil supply loop.
The hole that is used for fixing scale pan and anchor clamps on the said strain bar is a strip, can realize the adjustment of sample relative position up and down.
The fixing Kong Yousan of strain shaft bar group on the said experiment table realizes the adjustment of strain shaft bar position.
Said anchor clamps have three groups: ball chuck tool, pin anchor clamps and ring anchor clamps, the frictional wear experiment of realization ball dish, ring dish and pin dish friction pair.
On the said experiment table fixedly the hole of oil outlet be strip, realize the adjustment of oil outlet position, aim at friction pair when making it that lubricant medium is provided.
The friction wear testing machine of a kind of in site measurement of wearing and tearing of the present invention is compared with existing friction wear testing machine, and following advantage is arranged:
1 " can carry out the frictional wear experiment under dry friction, different medium such as physiological saline, lubricating oil and other liquid environment (the comprising corrosive liquids) condition.
2 " through changing anchor clamps, can realize the frictional wear experiment of pin dish, ball dish, ring dish friction pair.
3 " can realize visual wearing and tearing original position automatic measurement, abrading section high magnification map picture is provided, set up the corresponding relation of the different wear stage friction factor of sample, surface topography, wear extent.In the experiment, only need to set the time of gathering wear extent automatically, do not need to play sample to take off the automatic measurement that just can carry out wear extent.
Description of drawings
Fig. 1 is the structural front view of the friction wear testing machine of a kind of in site measurement of wearing and tearing of the present invention;
Fig. 2 is the vertical view of Fig. 1;
Fig. 3 is the partial enlarged view of Fig. 1;
Fig. 4 is the structural front view of a kind of pin anchor clamps of the present invention;
Fig. 5 is the left view of Fig. 4;
Fig. 6 is a kind of structural front view of encircling anchor clamps of the present invention;
Fig. 7 is the left view of Fig. 6;
Fig. 8 is the block diagram of a kind of in-situ measurement system that weares and teares of the present invention;
Among the figure: 1, experiment table; 2, oil pipe; 3, oil pump; 4 oil outlets; 5, swab case; 6, universal stage; 7, following sample; 8, ball chuck tool; 9, strain bar; 10, scale pan; 11, ball sample; 12, counterbalance weight; 13, strain shaft bar; 14, back shaft; 15, hold-down nut; 16, micrometric displacement platform; 17, magnet base; 18, USB digital microscope; 19, oil sump; 20, pin anchor clamps; 21, pin sample; 22, ring anchor clamps; 23, ring sample.
Embodiment
Fig. 1, Fig. 2, shown in Figure 3; A kind of specific embodiments of the friction wear testing machine of a kind of in site measurement of wearing and tearing of the present invention; Mainly comprise: experiment table 1, be arranged at the rubbing wear measurement mechanism on the experiment table 1, be arranged at wearing and tearing in-situ measurement device and lubricating system on the experiment table 1.
In the rubbing wear measurement mechanism, universal stage 6 is located on the experiment table 1, by motor-driven.Following sample 7 is fixed on the rotation platform 1 by dog screw; With universal stage 6 revolutions; Strain shaft bar 13 passes through four screw retention on experiment table 1; Strain bar 9 is fixed on the back shaft 14 by the shaft shoulder of hold-down nut 15 and back shaft 14; Back shaft 14 passes through bearings by strain shaft bar 13; Last sample can be a ball; Ring; Dish; With the ball is example; Ball sample 11 is clamped in the ball chuck tool 8; Ball chuck tool 8 is fixed in strain bar 9 front ends with scale pan 10 through thread connection; Scale pan 10 is used to place counterweight, provides; The normal stress of following sample friction pair, strain bar 9 rear ends are provided with counterbalance weight 12; Counterbalance weight 12 and strain bar 9 are through being threaded; Convenient adjustment strain bar horizontal equilibrium, the sensor of sample friction force is the full-bridge circuit of being made up of four resistance strain gages about measuring, and is affixed on the strain bar.
In the wearing and tearing in-situ measurement device; Magnet base 17 is adsorbed on the experiment table 1 through magnetic force; Be positioned at the right side of universal stage 6; Having or not of magnetic switch may command magnetic force on it; USB digital microscope 18 is fixed on the micrometric displacement platform 16, and micrometric displacement platform 16 is fixed on the magnet base, is used to adjust the position of USB digital microscope 18 cameras; Make it aim at polishing scratch, so that measure the wear extent of sample down.
In the lubricating system; Swab case 5, oil sump 19 and pump 3 pass through screw retention respectively on experiment table; Oil outlet 4 and tubing sub are fixed on the experiment table 1 through thread connection; Be positioned at universal stage 6 left sides; Fixedly the hole of oil outlet 4 is a strip; Can realize the adjustment of oil outlet position, make it aim at friction pair lubricant medium is provided; Oil pipe 2 connects oil sump 19, pump 3, oil outlet 4, swab case 5, forms oil supply loop.
Fig. 4, Fig. 5 are the specific embodiments of a kind of pin anchor clamps of the present invention, and anchor clamps are made up of two parts, adopt the mode of thread connection will play sample to be fixed in anchor clamps, and the first half of anchor clamps is a screw thread, so that link to each other with scale pan.
Fig. 6, Fig. 7 are a kind of specific embodiments of encircling anchor clamps of the present invention, and anchor clamps are made up of two parts, adopt the mode of thread connection will play sample to be fixed in anchor clamps, and the first half of anchor clamps is a screw thread, so that link to each other with scale pan.
Fig. 8 is the block diagram of a kind of in-situ measurement system that weares and teares of the present invention, is made up of wearing and tearing in-situ measurement device and Control Software.
Have the lubricated frictional wear experiment of medium that following steps are arranged:
1, the strain bar is demarcated, confirmed the corresponding relation of strain signal and friction force; The USB digital microscope is demarcated, confirmed the corresponding relation of image slices vegetarian refreshments and physical size.
2, adjustment piece makes strain bar horizontal equilibrium, loads counterweight by requirement of experiment.In oil sump, add lubricant medium, adjust oil nozzle, make it aim at friction pair.Regulate the micrometric displacement platform, make the camera of USB digital microscope aim at the polishing scratch of friction pair, so that gather the wear surface image.Start pump, treat to restart motor after lubricant medium flows into friction pair.
3, in the experimentation, the strain signal that collects is converted into friction factor, record strain signal and friction factor through data processing;
4, by requirement of experiment; Pass through USB digital microscope images acquired at setting-up time; Obtain the high-definition image of the different wear stages of wear surface, and calculate the polishing scratch width, observe surface topography, analyze friction mechanism (as shown in Figure 8) according to the image automatic or manual that collects.Before the images acquired, must earlier motor be stopped, the oil pump that stops is again waited for image acquisition, treat that image acquisition is accomplished after, open oil pump earlier, open motor again, continue experiment.
The frictional wear experiment that no medium is lubricated:
Basic step is identical with the frictional wear experiment that has medium to lubricate, and difference is on former basis in steps, to ignore the operation to pump and oil outlet.
Claims (8)
1. the friction and wear test machine of the in site measurement of wearing and tearing comprises: comprise experiment table (1); It is characterized in that; Be arranged at the rubbing wear measurement mechanism on the experiment table (1), be arranged at the wearing and tearing in-situ measurement device on the experiment table (1), be arranged at the lubricating system on the experiment table (1).
2. the friction and wear test machine of a kind of in site measurement of wearing and tearing according to claim 1; It is characterized in that; Said fretting wear measurement mechanism comprises: be located at the rotation platform (6) on the experimental bench (1); Following sample (7) is fixed on the rotation platform (6) by dog screw; Strain shaft bar (13) is fixed on the experimental bench (1); Strain bar (9) is fixed on the back shaft (14); Back shaft (14) passes through bearings by strain shaft bar (13); Last sample (11) is fixed in the anchor clamps (8); Anchor clamps (8) and scale pan (10) are fixed in strain bar (9) front end by thread connection; Strain bar (9) rear end is provided with balance weight (12); Balance weight (12) and strain bar (9) are by being threaded, and measuring up and down, the sensor of sample frictional force is arranged on the strain bar (9).
3. the friction and wear test machine of a kind of in site measurement of wearing and tearing according to claim 1; It is characterized in that; Said wearing and tearing in-situ measurement device comprises: the magnet base (17) that is adsorbed on the experiment table (1) through magnetic force is positioned at rotation platform (6) right side; Micrometric displacement platform (16) is fixed on the magnet base (17); Be fixed in the USB digital microscope (18) of micrometric displacement platform (16) external part, the camera of its front end is positioned at following sample (7) top and aims at the polishing scratch of friction pair.
4. the friction and wear test machine of a kind of in site measurement of wearing and tearing according to claim 1; It is characterized in that; Said lubricating system comprises: swab case (5), oil sump (19) and pump (3) are individually fixed on the experiment table (1); Oil outlet and (4) tubing sub are fixed on the experiment table (1); Be positioned at rotation platform (6) left side, oil pipe (2) connects oil sump (19), pump (3), oil outlet (4), swab case (5) formation oil supply loop.
5. the friction and wear test machine of a kind of in site measurement of wearing and tearing according to claim 2 is characterized in that, the hole that is used for fixing scale pan (10) and anchor clamps (8) on the said strain bar (9) is a strip, can realize the adjustment of sample relative position up and down.
6. the friction and wear test machine of a kind of in site measurement of wearing and tearing according to claim 2 is characterized in that, said experiment table (1) is gone up the fixedly Kong Yousan group of strain shaft bar (13), realizes the adjustment of strain shaft bar (13) position.
7. the friction and wear test machine of a kind of in site measurement of wearing and tearing according to claim 2 is characterized in that, said anchor clamps have three groups: ball chuck tool (8), pin anchor clamps (20) and ring anchor clamps (22), the frictional wear experiment of realization ball dish, ring dish and pin dish friction pair.
8. the friction and wear test machine of a kind of in site measurement of wearing and tearing according to claim 4; It is characterized in that; The last fixedly hole of oil outlet (4) of said experiment table (1) is a strip, realizes the adjustment of oil outlet (4) position, aims at friction pair when making it that lubricant medium is provided.
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CN102538692A (en) * | 2012-01-17 | 2012-07-04 | 济南试金集团有限公司 | Four-ball wear scar testing device |
CN102607977A (en) * | 2012-03-21 | 2012-07-25 | 西安交通大学 | Abrasion in-situ measuring device based on digital image processing and method |
CN104020044A (en) * | 2014-05-13 | 2014-09-03 | 武汉材料保护研究所 | Digital microscope wear scar measurement device |
CN105043976A (en) * | 2015-07-28 | 2015-11-11 | 南京航空航天大学 | Test device for dynamically measuring fretting pair frictional coefficient during fretting fatigue process and test method |
CN105572033A (en) * | 2014-04-21 | 2016-05-11 | 北京雅士科莱恩石油化工有限公司 | Evaluation method of antifriction and anti-friction and anti-wear properties and friction tester |
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Application publication date: 20120104 |