Device for testing materials

FIELD: tribometry.

SUBSTANCE: device has the platform which is provided with an article and set on rollers, drive for reciprocating, unit for loading articles, and pickups for recording forces and displacements .

EFFECT: enhanced accuracy of testing.

1 cl, 3 dwg

 

The invention relates to the field of study of physical-mechanical properties of materials, and more specifically to the field of study of their tribological properties, and can be used for the quantitative determination of the components of the forces of dry and viscous friction.

You know, the device for determining the coefficient of friction of materials, the copyright certificate №930081, MKI G 01 N 19/02. The device includes a base, a slider for attaching it contrapasso on which you installed the sample, adjustable drive reciprocating movement. In addition, the device includes an acceleration sensor slider sensor, move the sample relative to contrapasso and the instrumentation of the vibro-measuring unit and svetloserogo oscilloscope.

The disadvantage of this device is the limited field of application. This device does not allow testing of polymeric materials, including elements of flexible cables, friction, because in them is a complex process during operation, and application acceleration sensor does not give a clear picture of the process, besides the absence of the holders makes it impossible to test flexible cables.

The prototype is a device for testing materials in friction, copyright certificate №1821689, MKI G 01 N 19/02.

The device comprises a base is a cation, on the basis of the slider, on which is placed holders with slots. In the slots installed the sample and interacts with controversies. The device also includes drive reciprocating movement of the slide, the displacement sensor sample connected with recording equipment and indicators move samples, and the slider includes a slider move, the indicator and the sensor attached to the specimen holder. Thanks holders with slots have the opportunity to expand the range of studies to investigate not only solid, but also elastic materials.

However, this device cannot provide information on the tribological characteristics of the material, as further data processing. It takes a lot of time, the possible error in the calculation of these characteristics. In addition, the presence of additional elements connecting the holders of sensors affect the accuracy of the research.

Task quickly and with great accuracy to investigate the tribological characteristics of materials.

The problem is solved as follows. Also, as a prototype, the proposed device comprises a base mounted on the base mechanism, which are the holders with slots for the corresponding mutual placement of the sample and contrapasso, the drive of the reciprocating pic is watalinga moving mechanism, the site of sample loading, sensor registration efforts and the indicator connected to the holder contrapasso, displacement transducer and an indicator connected to the sample holder, the detection apparatus, which is connected to the displacement sensor and sensor registration efforts. But unlike the prototype in the inventive device, each sensor is made of optical-mechanical in the form of a disk with slits, attached to the axis of the arrow of the relevant indicator between emitter and photo sensor, as well as recording equipment used computer, with sensors connected to the last port mouse, in addition, the mechanism that hosts holders, made in the form of a platform on rollers, and the node load is supplied by a cart with wheels placed on the holder contrapasso.

The site loading in the inventive device is made as a screw Jack mounted on the carriage and connected to the reversible motor and the dynamometer.

Thus, the distinctive features of the prototype, confirming the novelty of the claimed device are the following characteristics:

each sensor is made in the form of a disk with slits;

disc mounted on the axis of the arrow corresponding indicator;

disc is located between the emitter and photosensor;

as recording equipment used computer for the EP;

sensors connected to the computer through the mouse port;

the mechanism for placing the samples was performed in the form of a platform on rollers;

site loading is equipped with a trolley with rollers;

- rollers placed on the holder contrebasse;

site loading is made in the form of a screw Jack mounted on the carriage and connected to the reversible motor and the dynamometer.

In the inventive device and the mechanism for placing the specimen holder, and the site loading relies rollers, which gives the opportunity without the influence of the site of loading, i.e. excluding the resistance force, rate of force arising between the samples in the pair of friction, which affects the measurement accuracy. The leads of the LEDs are connected directly with the specimen holder, which affects the accuracy of the measurements.

Because the sensors are connected to a personal computer through the mouse port, it becomes possible to quickly and accurately investigate the tribological characteristics of materials, i.e., to solve the problem.

Mounted on the axis of the indicator needle and placed between the emitter and photosensor disk with slits, and the connection of the emitter and photosensor with mouse port allowed without an auxiliary approval to convert mechanical movement into an electrical signal that is perceived by a computer. In fact, gauges-indicators is Vlada simultaneously and sensor registration efforts and move, and block matching (Converter) with your computer. It is not obvious from the prior art and confirms the presence of inventive step in the claimed device.

The figure 1 shows the General diagram of the device in figure 2 - view of the sensor side, in the figure 3 - view of the sensor on the front.

The device consists of drive mechanisms platforms reciprocating movement of the samples, site loading, the specimen holder and the measuring system.

Based on 1 performed guides 2, which set the platform 3 with the holder 4 sample 5. On top of the sample 5 has controverses 6 with its holder 7. The sample 5 and controversies 6 form a pair of friction. The specimen holder 4, 7 are removable. Removable specimen holder extend the range of the tested structural elements and materials. Platform 3 is equipped with four rollers 8. Drive reciprocating movement serves as a crank mechanism 9 with the engine 10. The site loading device consists of a Jack-screw 11 mounted on the truck 12 with wheels 13. The Jack 11 is connected to the dynamometer 14 and reversible motor 15 through a worm gear (not shown). The Jack 11 is placed on the stand 16. The cart 12 is installed on the holder 7 contrapasso 6. Rollers 13 trucks are made similar to the rollers 8 platform is RMI 3. The measuring system consists of a displacement sensor 17, combined with travel indicator (not shown). The probe 18 of the measuring indicator sensor 17 is rigidly connected to the holder 4 sample 5. The measuring system consists of sensor registration efforts 19, combined with the corresponding indicator (not shown), the probe 20, which is rigidly connected to the holder 7 contrapasso 6. The sensors 17, 19 are placed on the rack 21, which is mounted on a base 1. The measuring system also includes a recording apparatus 22, a role which is performed by the computer. The sensors 17, 19 connected to the computer 22 via the mouse port (not shown). The sensors 17, 19 (2, 3) is made of optical-mechanical: on the axis of the arrow 23 indicator wearing a light disk 24 with the slots 25. The disk 24 is installed between the emitter of infrared radiation 26 which performs infrared emitting diode, and the photosensors 27 (photoresistor). The photosensor 27 and the emitter 26 is connected to the computer 22 via the mouse port.

The device operates as follows. From the engine 10, the motion is transmitted through the crank mechanism 9 to the platform 3, which, in turn, results in movement of the sample holder 4 sample 5. Vertical load on the samples generated screw Jack 11, the driven reversing what whitelam 15 through a worm gear. The load is transmitted through the transducer 14, which shows a fixed load. As the cart 12, which transmits the load on the holder 7 has rollers 13, and the platform 3, which performs a reciprocating movement with the holder 4 sample 5 has a similar rollers 8, the upper holder 7 has the ability to move due to friction forces between the sample and the loading mechanism does not influence the measurement.

In the result of the interaction of the frictional forces between samples 5, 6 will move the probe 18 and the probe 20 indicators. The measured displacement is converted into electrical impulses in the sensors 17, 19. It happens this way. The reciprocating movement of the holders 4, 7 samples 5, 6 is converted into rotational movement of the axes of the arrows 23 indicators, and hence the disk 24 with slots 25 (breaker), through which passes (or fails) the flux of infrared radiation from the emitter 26 (2) (infrared emitting diode). Therefore, when the rotation of the disk 24, the radiation flux is interrupted, that is registered by the corresponding photosensor 27 (phototransistor).

Information from the sensors 17, 19 is input to a computer 22 (figure 1) through the mouse port. Each pulse of the past radiation is considered as moving one step on one of the coordinates (the coordinate movement or effort). Supply the e IR emitter 26 and the photosensor 27 is supplied from the computer via the mouse port.

Direct connection of the sensors 17, 19 through the mouse port with the computer 22 makes it possible, using an appropriate program on the monitor to get the chart: the friction force - displacement force - time and displacement - time, and processing them using mathematical software - tribological characteristics: the coefficients of dry and viscous friction, the damping ratio of the system; logarithmic decrement; the frequency of free and damped vibrations, etc.

1. A device for testing materials in friction, contains the basis set on the basis of the mechanism, which are the holders with slots for the corresponding mutual placement of the sample and contrapasso drive reciprocating movement of the mechanism, the site of sample loading, sensor registration efforts and the indicator connected to the holder contrapasso, sensor registration, travel, and an indicator connected to the sample holder, the detection apparatus, which is connected sensors register the movement and effort, characterized in that each sensor is made of optical-mechanical in the form of a disk with slits, attached to the axis of the arrow of the relevant indicator between emitter and photo sensor, as well as recording equipment used computer, with sensors connected to the last h is through the mouse port, in addition, the mechanism that hosts holders, made in the form of a platform on rollers, and the node load is supplied by a cart with wheels placed on the holder contrabbasso.

2. The device according to claim 1, characterized in that the node loading made in the form of a screw Jack mounted on the carriage and connected to the reversible motor and the dynamometer.



 

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FIELD: tribometry.

SUBSTANCE: device has the platform which is provided with an article and set on rollers, drive for reciprocating, unit for loading articles, and pickups for recording forces and displacements .

EFFECT: enhanced accuracy of testing.

1 cl, 3 dwg

FIELD: measuring engineering.

SUBSTANCE: instrument has platform pivotally connected with the base, box without bottom filled with plastic material, tie-rod device, bearing member which can be adjusted in height with spacers and guides mounted on the plate. The layer of material comprises particles. The box is connected with the platform through a damping link provided with arresting carrier.

EFFECT: enhanced accuracy of measurements.

2 dwg

FIELD: plastic metal working.

SUBSTANCE: method comprises calculating the stress-strain condition of the tool and blank with regard for their materials and geometry, plotting a diagram "deformation force - friction coefficient" of the process of plastic deformation, determining experimentally the deformation force, which corresponds to the actual condition of the surfaces of tool, blank, and lubricant, and determining friction coefficient from the diagram.

EFFECT: enhanced accuracy and reduced labor consumption for determining.

3 dwg

FIELD: investigating or analysis of material.

SUBSTANCE: method comprises determining the limit value of the stress by measuring the angle of inclination of the surface which is provided with the initial material. The device comprises changeable coating with projections and locking member made of a frame having thin baffles or thin film made of an adhesive agent.

EFFECT: improved method.

2 cl, 3 dwg

FIELD: investigating or analyzing materials.

SUBSTANCE: device comprises housing, mechanism for loading, specimen holders that are provided with parallel bearing planes and mounted one opposite to the other. One of the holders cooperates with the loading mechanism. The mandrel provided with the spherical indenter is interposed between the specimen holders. The device has the mechanism for rotation of the indenter around its axis and unit for measuring the applied moment. The mechanism for rotation of the indenter is made of the lever secured to the mandrel, segment secured to the lever, and flexible link that embraces the segment and undergoes the load.

EFFECT: expanded functional capabilities.

1 dwg

FIELD: investigating or analyzing materials.

SUBSTANCE: method comprises measuring parameters of the pavement and calculating the grip coefficient. First, the ordinate of the micro-profile of pavement is measured, and then the dependence y = f(x), which describes the micro-profile in a given section, is determined. The dependence is used for determining the length of the curve of micro-profile, and parameters Ki of the pavement roughness are determined from the formulae proposed.

EFFECT: simplified method and reduced cost of determining.

2 dwg

FIELD: measurement technology; test equipment.

SUBSTANCE: method intends for inspection of rolling bearings, plain bearings and bearing units in instrument engineering, mechanical instrument engineering and electric machine engineering. One ring of bearing is loaded with permanent radial force and the other one is brought into oscillatory motion with specified frequency and amplitude by means of electro-mechanical system made of sync electric motor provided with active rotor and with two windings on stator. One winding is connected with dc source and the other one is connected with ac source. Alternative current is measured in second winding. Angular speed of oscillations of rotor is measured additionally and equivalent dissipative factor is calculated as product of constitutive factor of electric motor and relation of average meaning of current value product during period by speed to average square speed within the period.

EFFECT: improved precision of measurement.

1 dwg

FIELD: investigating or analyzing materials by mechanical methods.

SUBSTANCE: device comprises base, holder for specimen mounted on the base, carriage with holder for counter-body, loading unit, meter of friction force, drive for moving one of the holders, guide secured to the carriage perpendicular to the surface of the specimen, rod that can be set in translational motion in the guide, loading unit mounted at one of the ends of the rod, pivot mounted at the other end of the rod, holder made of a rod whose one end is secured to the axle of the pivot and the other end is provided with counter-body, spring, meter of friction force mounted on the carriage oppositely from both sides of the holder of counter-body and parallel to the plane of the specimen at the same distance from the axis of the pivot to the working surface of the specimen. The spring locks the holder of counter-body perpendicular to the working plane of the specimen. The axis of rocking of the pivot is parallel to the surface of the specimen and perpendicular to the direction of movement of the specimen and counter-body.

EFFECT: expanded functional capabilities.

1 cl, 1 dwg

FIELD: test equipment.

SUBSTANCE: machine can be used for testing materials and lubricant matters for complicated trajectories relatively movement of interacting friction pairs. Two-coordinate friction machine has base, sample's holder, two-coordinate drive, counter-body's holder, loading mechanism interacting counter-body, two-component force detector connected with counter-body's holder, program control system and friction force main vector instant value automated estimation system. Two-coordinate drive is made in form of two independent movable carriages which move at mutual-perpendicular directions. Holder of flat sample is disposed onto one carriage and counter-body's holder, loading mechanism interacting with holder and two-component force detector connected with holder of counter-body are disposed on the other carriage. Program control system is made in form of control computer connected with independent control modules and with electric engines through matching unit. Electric engines drive two-coordinated drive into motion to provide movement of indicator which interacts with working surface of sample along continuous nonlinear two-dimensional trajectory.

EFFECT: widened functional abilities; improved precision; better truth of result.

4 cl, 1 dwg

FIELD: engineering of equipment for friction tests.

SUBSTANCE: as sample holder a shaft is used, which is connected by means of connecting rod mechanism to swinging movement drive, made with possible setting of shaft rotation angle and its rotation speed during rotation for given angle. On top of sample a counter-sample is mounted with its own holder. Sample loading unit abuts by rollers on counter-sample holder. Measuring system includes forces indicator, connected to counter-sample holder, sample movement indicator, connected to its holder, indicator of load output, connected to samples loading unit, optical-mechanical indicators, each one of which is made in form of disk with slits pinned onto axis of arrow of appropriate indicator between emitter and photo-detector, and is connected to computer through mouse port.

EFFECT: increased trustworthiness and precision of tribological characteristics of round and spherical bodies during rotation thereof.

6 cl, 3 dwg

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