470 results about "Wear testing" patented technology

The invention provides a multifunctional vacuum friction and wear testing machine, which not only can simulate special environmental atmospheres such as vacuum, radiation and corrosion, but also can conduct tribology tests in a relatively wide speed and load range by using various contact manners (ball-disc and pin-disc). The multifunctional vacuum friction and wear testing machine mainly comprises a vacuum system, a friction and wear system, a power transmission system, a control system, and the like, wherein the friction and wear system comprises a lever structure (22) used for fixing a test sample fixture (20) and capable of freely rotating in a horizontal direction and a vertical direction; the lever structure (22) comprises a cantilever beam (18) and a vertical arm (23) which are arranged in a perpendicular manner; the cantilever beam (18) is connected with the vertical arm (23) through a two degree of freedom bearing structure (17); positions of the cantilever beam (18) and the vertical arm (23) can be adjusted in the horizontal direction and the vertical direction through the control of a manipulator (15) and a hand wheel structure (13), so that the test sample fixture (20) can accurately move within two degrees of freedom; and a temperature sensor (2) and a pressure sensor (3) are mounted on the test sample fixture (20), so as to detect/monitor friction coefficients and temperature variations during the tribology tests.

This invention relates to one multi-function micro friction test machine, which comprises drive device, move device connected to the drive one and load and measurement device on the move device and lift bench of the measurement device, wherein, it uses hanging spring board and connection bar are hinged with drive device and move device to make the slide bench generate one small range reverse line move under bar push with constant vibration range and small error; it uses motor to drive connection bar push slide to generate large vibration reverse line move.

An apparatus for measuring abradability of a sample comprises a rotating drum with a rough surface and a means for contacting a sample with the rough surface while the drum is rotating. The sample may be caused to rotate relative to the drum, and to translate across the drum while the drum is rotating. Environmental controls may be used to control the temperature and the atmospheric conditions of the test. In the method of the invention, energy consumed by contact between the sample and the drum, as well as the weight loss of the sample, may be measured.

This invention discloses two kinds of friction wearing testing machine of integration of reciprocating and rotating, which comprises base socket , reciprocating structure, rotating structure and upper-specimen control device, wherein, the reciprocating structure comprises reciprocating motor, slide block, slide rail, crank, connecting bar; and the rotating structure comprises rotating drive motor and rotating disc; and the upper-specimen control device comprises spring arm, guide rail and slide holder or spring arm , rotating parts and base socket. This invention integrates the reciprocating structure friction wearing machine and rotating friction wearing machine into one structure through special designed base socket and upper-specimen control device and it needn't disassembly specimen and ensures the accuracy of the experience data.

The invention relates to a constant temperature wiggly corrosive wear testing device and a test method thereof. A medium cavity of a high ball discharge test piece is arranged on the periphery of a lower clamp of the testing device, and the cavity is filled with test medium; the wall of the cavity is of a sandwich layer structure, the lower part of the sandwich layer is provided with a water inlet, the upper part is provided with a water outlet, the water inlet is connected with a constant temperature water bath kettle by a miniature water pump, and the water outlet is directly connected with the constant temperature water bath kettle, thereby forming a constant temperature water circulation system; an auxiliary electrode and a reference electrode are immersed in test medium of the medium cavity; and the auxiliary electrode, the reference electrode and the upper end face of an upper test piece are respectively connected with the corresponding port of a microprocessor controlled electrochemical workstation by conducting lines so as to form an electrochemical corrosion test system. The testing device and the method thereof can conveniently wear materials in the constant temperature test medium by wiggly corrosion, thereby much more factually and accurately testing the wiggly corrosive wear property of the materials in the specific corrosion medium; and the testing device and the method thereof provide much more accurate and reliable test basis for corresponding design, so that the properties and the service lives of equipment and apparatus can be increased.

The invention provides a friction and abrasion tester for reciprocating piston ring-cylinder liner. The invention relates to the technical field of mechanism friction and abrasion, in particular to a friction and abrasion tester for reciprocating piston ring-cylinder liner as a friction paring element practically applied in an internal-combustion engine. A motor driven crankshaft connecting rod mechanism of the tester moves in linear reciprocation through a slide block and a guide sleeve of a guide mechanism, a loading system adopts extrusion-high strength bolting structure to change the pressure from a piston ring of the high strength bolting to the cylinder liner, a lubricator and an oil collector of a lubricating device are positioned on the loading mechanism corresponding to the position of the cylinder liner, sensors of a friction tester and a temperature measurement and a control device are connected to a data collecting card of a data collecting and monitoring device and a computer through interfaces. The invention adopts the practically applied piston ring-cylinder liner of an internal-combustion engine as a friction paring element, load, speed, temperature, lubricant supply experimental parameters can be changed; the invention can monitor temperature, friction experimental data and process experimental data.

The invention provides a high temperature friction wear testing machine, belongs to the technical field of material wear tests, and solves the technical problems that the test precision of the testing machines in the prior art is low and the like. The high temperature friction wear testing machine comprises a frame. The frame is provided with a rotating shaft, and is also provided with a driving device. The top end of the rotating shaft is provided with a tray, the surface of the tray is coated with a thermal insulation layer, and a friction disk is fixed on the surface of the tray. The frame is provided with a bracket, and the bracket is provided with a beam. The beam is provided a force value sensor, and a loading rod is arranged at one end of the beam. A specimen holder is arranged at the bottom end of the loading rod. The high temperature friction wear testing machine comprises a high temperature furnace. The high temperature furnace is provided with a heating cavity, and the bottom end of the loading rod is inserted in the heating cavity. An opening is arranged at the bottom part of the heating cavity, the tray is located out of the opening, and the friction disk is located in the heating cavity. The high temperature friction wear testing machine has the advantages of high test precision and the like.

A variable-load cylinder-sleeve piston-ring frictional wear testing device is mainly composed of a main shaft motor, a guide rail, a sliding table, left and right uprights, a work table, a lever, a loading rod, a swing limiter, a load changer, an inner concave cambered-surface lower clamp and an outer convex cambered-surface upper clamp. An alternating force is generated by the load changer, and then is amplified by the lever to act on a test piece, thereby realizing radial loading of a piston ring to a cylinder sleeve; a variable load is measured in real time by a pressure sensor between theload changer and the lever; friction is measured by a foil gauge on the loading rod; the swing amplitude of the lever is reduced by the swing limiter; the loading rod comes into contact with the outer convex cambered-surface upper clamp through a ball pair to guarantee that the loading direction is vertically downward; the rotating speed of the motor is controlled by means of a program so as to carry out frictional wear tests at different speeds. The testing device is simple in structure, various in testing functions and high in accuracy.

The invention discloses a friction wear testing machine and comprises an abrading agent slot, a grinding steel wheel that is suspended in the abrading agent slot, a boosting lever that has a vertical arm suspended between the grinding steel wheel and a lateral wall of the abrading agent slot, a servo sand slot that has a sand discharging mouth and a transmission pipe, a servo spring loading mechanism that is connected with a horizontal arm of the boosting lever, a load sensor that is serially connected between the servo spring loading mechanism and the boosting lever and a temperature sensor that is arranged on the back of a sample. A main shaft of the grinding steel wheel is arranged on a bearing holder, connected with a torque sensor through a flexible coupler and connected with a frequency-varied speed-regulating drive motor, and a computer adjusts and detects the sand discharge amount of the sand slot, the rotating speed and the torque of the frequency-varied speed-regulating drive motor, and the loading capacity of the servo spring loading mechanism in real time, and can detect and record the rotational frequency of the grinding steel wheel and sample temperature in real time. The friction wear testing machine can detect and analyze the abrasion resistance and the frictional behaviour of hard alloy products under the conditions close to real working conditions.

The invention provides a friction and wear testing machine of guide rail of machine tool and relates to a friction and wear testing device of guide rail pair, belonging to the technological field of tribology. The testing device comprises a testing system and a measuring system. An oil blocking plate in the testing system is provided with an upper sample platform, an oil blocking plate, a lower sample platform, a first sensor mounting bracket and a second sensor mounting bracket; the first sensor mounting bracket and the second sensor mounting bracket are respectively arranged on a base; a flat V guide rail is arranged between the lower sample platform and the base; an upper sample fixture is arranged between the first sensor mounting bracket and the second sensor mounting bracket; the first sensor mounting bracket and the second sensor mounting bracket are connected with a cover plate respectively by a support rod. The novel friction and wear testing machine of the machine tool can simulate the actual working condition, and directly adopt the guide rail as the sample. Moreover, the testing machine can not only be used for rapidly assessing the material of the guide rail pair and the lubricating medium, but also can be used for the accelerated life test of the straight guide rail pair and the rolling guide rail pair.

The invention discloses a testing machine of small-load attacking wear. Stand board is fixed behind base. Exciter with a downward roof bar is equipped in front of top of. End of exciter roof bar connects piezoelectric impedance sensor and upper sample holding device in turn. Lower sample holding device is fixed under the sample holding device on the base. The testing machine suits for tests with small-load attacking, which has merits including high automatic degree, stable working load, good persistent-working ability, high precision and good repeatability of test data.

The invention relates to abrasion machine of the elevator towing contacting tiredness. The variable-frequency electric machine drives the towing wheel to rotate by the shaft coupling and the bearing block after the reducer; one end of the cable wire is connected to the arc framework and the other is connected to the draught spring after fixing the two end with the lantern ring by the clap; it changes the pressure and the friction force between the cable wire and the wheel slot by changing the tension force of the cable wire by loading the hand wheel to draw the spring. So it can get the friction force by the fore-and-aft pulling force. So the invention can test the sliding friction and the abrasion character in the different condition to provide the data for designing the elevator towing.

The invention discloses a friction wear testing machine for on-line measurement, which comprises an experiment table, a friction wear experiment device arranged on the experiment table and a surface topography measurement device. The friction wear testing machine is characterized in that the friction wear experiment device comprises a stress beam, and a support and a rotating platform which are arranged on the experiment table, the rotating platform fixes a lower specimen, and the support is positioned at one side of the rotating platform; the support is provided with a rotating shaft which is fixed with a walking beam, one end of the walking beam is fixed with a balance weight lever which is provided with a balancing weight, the other end of the walking beam is fixed at one end of the stress beam, the other end of the stress beam is fixed with a collet which is fixed with an upper specimen, and the collet is provided with a scale pan which is provided with weights; the stress beam is provided with a force sensor for measuring the friction force between the upper specimen and the lower specimen; and the surface topography measurement device comprises a three-coordinate adjustment table arranged on the experiment table, the three-coordinate adjustment table is provided with a surface contourgraph, and a probe of the surface contourgraph extends above the rotating platform.

The invention discloses a method for controlling an accurate ratio of various gas atmospheres, which is used for a high-temperature gas atmosphere frictional wear testing machine, and a device thereof. The device consists of a plurality of gas input branches, a gas atmosphere mixing box, a test environmental gas chamber device, a temperature control device and a cooling system; the pressures of aplurality of gas sources are reduced to a given pressure by a pressure reducing valve; the flow ratio of all gas atmospheres is controlled by the mass flow controller; the mixed gas atmosphere is sentto the ambient temperature gas chamber needed in the test by a gas channel; and in a semi-closed environmental gas chamber, the sliding frictional wear test of a ball/disk or pin/disc in the high-temperature gas atmosphere environment is performed by relatively turning dual faces. The method realizes the accurate control of the ratio of various gas atmospheres and the ambient temperature and meets the gas supply requirements for the continuous frictional wear tests; and the device has a simple structure and can be safely and reliably operated, so that the aims of accurately controlling the ratio of various gas atmospheres and realizing low cost are achieved.

Disclosed is micro-arc oxidation process to reduce the friction coefficient of titanium alloy surface, which has the process steps of (1) the chemical degreasing, (2) the micro-arc oxidation that the basic parameters are trisodium phosphate of 1-30g / L, tungsten sodium of 0-10g / L, sodium silicate of 0-50g / L, tartaric acid of 0-20g / L, glycerol of 0-10g / L and sodium hydroxide of 5-10g / L, (3) the post-processing that the hot oil immersion treatment is proceeded for the film after the oxidation. Through the invention, the high-performance ceramic membrane with strong cementing property, high hardness and low coefficient friction can be obtained on the titanium surface. Through the testing of a high-temperature friction and wear testing machine of MM-U5G screen material end surface, the friction coefficient of the titanium micro-arc oxidation film is 0.1 to 0.5. During the observation of the oxidation film after the experiment, the shedding and wear phenomenon is not found.

The invention discloses an impacting-sliding composite frictional wear testing device and a method thereof. The method comprises the following steps that a spherical upper test piece is clamped on an upper clamp and a planar lower test piece is clamped by using a lower clamp; the lower clamp is controlled to move up and down by a precise screw lifting platform so that the upper test piece and the lower test piece come into contact; a servo motor drives the upper test piece to do up-down reciprocating motion at set frequency f, times N and displacement S by an eccentric disc, an upper knuckle bearing, a lower knuckle bearing, an impacting shaft, a spring leaf and an upper clamp, and carries out reciprocating impact on the lower test piece; in the impacting process, the spring leaf is deformed under the action of stress, so that impacting-sliding composite frictional wear between the upper test piece and the lower test piece is realized; and simultaneously, the force borne by the lower test piece is tested by a three-dimensional dynamic piezoelectric sensor connected with the lower clamp and is transmitted to a data acquisition control system, and a friction coefficient-cycle time curve is obtained by analysis. The impacting-sliding composite frictional wear testing device and the method disclosed by the invention have the advantages that the material can conveniently generate rigidity-adjustable impacting-sliding composite frictional wear, the automation degree is high and the repeatability of experimental data is good.

The invention discloses an air flow sand-blasting-type erosive wear testing machine. The air flow sand-blasting-type erosive wear testing machine comprises a high-speed air flow unit, a screw rod charging unit, an erosive testing unit and a purifying and dedusting unit, wherein the high-speed air flow unit and the screw rod charging unit are both communicated with an inlet of the erosive testing unit; the dedusting unit is communicated with an outlet of the erosive testing unit; the screw rod charging unit comprises an electronic scale, a material storage chamber, a charging funnel, a charging screw rod and a screw rod electromotor, wherein the electronic scale is provided with the material storage chamber; the material storage chamber is provided with the charging funnel communicated with the material storage chamber; the charging funnel is provided with the charging screw rod driven by the screw rod electromotor, and the material storage chamber is communicated with a suction spray gun by a charging pipeline; the screw rod electromotor is controlled by a controller. According to the erosive wear testing machine, the air flow impact speed can be up to 0m/s-200m/s by regulating an air exhaust valve and a flow meter. The erosive angle is changed between 0 degree and 90 degrees by a specimen rotary table. The uniform charging can be ensured by means of a screw rod charger.

The invention discloses a high-temperature pressurization airflow solid particle erosive wear testing device. The high-temperature pressurization airflow solid particle erosive wear testing device comprises an air compressor, a high-temperature air heater, an electronic high-temperature control valve and an air flowmeter, wherein the air compressor, the high-temperature air heater, the electronic high-temperature control valve and the air flowmeter are connected in sequence through pipes. An air outlet pipe of the air flowmeter is connected with an upper cavity of a closed type solid particle feeder, and a discharging port pipe of the solid particle feeder stretches into a box through a solid flow regulating valve and a solid flowmeter. A specimen holder is arranged inside the box, a specimen heater is arranged on the specimen holder, an outlet of the solid flowmeter right faces the position above the specimen heater, and an infrared speed meter and a high-speed camera are arranged above the specimen heater. The high-temperature pressurization airflow solid particle erosive wear testing device can be widely applied to the field of erosive wear and suitable for high-temperature erosive wear testing of various materials.

The invention provides a double-column rotary corrosive-wear testing machine, comprising a testing stand, which is provided with two columns, wherein a crossbeam is arranged on the columns and a through hole is formed in the center of the crossbeam; a crossbeam elevating and driving mechanism, which is arranged on the test stand and connected with the crossbeam; a testing drum, which is arranged on the center of the test stand, wherein an annular temperature control/cooling pipeline is arranged in the lower part of the testing drum; a transmission shaft, which passes through and is arranged in the through hole in the crossbeam; a sample clamping disc, which is fixed at the lower end of the transmission shaft, wherein the upper end surface of the sample clamping disc is provided with an annular groove, and the outer sides of the annular groove are provided with installation through holes; working electrodes, i.e., to-be-tested samples, which are inserted into the installation through holes; an auxiliary electrode, i.e., an annular platinum wire, which is arranged in the annular groove of the sample clamping disc; reference electrodes, which are uniformly distributed on the sample clamping disc at positions corresponding to the working electrodes; and a dynamic connection pool, which comprises annular dovetail cups, wherein the annular dovetail cups sleeve the upper part of the transmission shaft, leading-out circular rings are arranged at the bottom of the inner sides of the annular dovetail cups, the outer sides of the leading-out circular rings are provided with wiring copper columns penetrating the bottoms of the cups, the interior of each annular dovetail cup is provided with an electric needle, the lower ends of the electric needles are certain distance away from the leading-out circular rings, and the working electrodes, the auxiliary electrode and the reference electrodes are connected with the dynamic connection pool through leads.

A wear test system for monitoring wear of a sample including a test material located on a base surface of a contrasting color. The system includes a scrub machine with a scrub device mounted for movement over a defined path on the sample. A camera is located above the defined path in a test monitoring area, and a controller is connected to the scrub machine and the camera. The controller creates time evolved composite wear data for wear of the test material from the sample.

The invention relates to an experimental device to detect and analyze wearing of superhard tool. It is a multifunctional rubbing-wearing experimental machine. It is characterized in that: it contains first hydraulic cylinder (1), soleplate (2), first guide (3), upright column (4), gliding block joint plate (5), crossbeam (6), torque sensor (7), hydraulic motor (8), headstock (9), principle axis (10), rotary transducer (11), workbench (13), third hydraulic cylinder (14), third guide (15), slip board (16), second guide (17), second hydraulic cylinder (19) and first pressure sensor (20). Set (20) in (1) and rotate speed measuring flag on principle axis of hole in (11). (11) and (9) are connected. (7) is composed of a twist bar (28) and two torque meter pressure sensors (29). The invention can realize drilling, sawing and milling of tool, test torque, drilling speed and infix pressure parameters of superhard tool during working.

The invention discloses a bearing impact friction-wear testing machine. The bearing impact friction-wear testing machine comprises a test stand, a main drive system, a friction pair system, a radial impact system, a hydraulic loading system, a temperature and humidity control system, a signal acquisition and detection system and a computer. The working condition in the friction pair system duringa bearing friction-wear test is changed through the main drive system, the hydraulic loading system and the temperature and humidity control system, and the vibration condition in the vibration bearing operation is simulated by the radial impact system; and the bearing friction-wear output parameters in the friction pair system are collected and monitored in real time by the signal acquisition anddetection system, and are transmitted to the computer through a data acquisition card for data processing and analysis so as to carry out a friction-wear test of a bearing under the coupling effect of impact and friction. The bearing impact friction-wear testing machine provides an effective testing platform for studying the wear behavior of the bearing under the coupling effect of the impact andfriction, and the collected test parameters can be used as judging criterions for bearing wear state identification.

The invention discloses a rotary reciprocating frictional wear testing machine which comprises a rack provided with a rack workbench, a rotation test device, a linear reciprocating test device, a testforce loading mechanism and a sample clamping module. The rotation test device comprises a rotation driving motor. The rotary driving motor is vertically arranged in the rack and is positioned at a lower part of the rack workbench. The linear reciprocating test device comprises a reciprocating motion linear motor which is a voice coil motor. The reciprocating motion linear motor is horizontally arranged on the rack, an axis of the reciprocating motion linear motor perpendicularly intersects with an axis of the rotary driving motor, the sample clamping module is detachably mounted on the rackworkbench and is coaxial with the axis of the rotary driving motor. The test force loading mechanism comprises a lifting mechanism and a force application mechanism, the lifting mechanism is arrangedon the rack, the force application mechanism comprises a force application shaft, a measurement sensor connected to the force application shaft and an upper sample clamp connected to a lower end of the force application shaft, and the force application mechanism is connected to the lifting mechanism.