Pin on disc friction and wear tests phoenix tribology ltd. Pdf one of the main criteria for the establishment of the performance of a. Joshi17 studied the characteristics of lubricant, materials and coatings by doing pinondisc experiment respectively. After the pnjunction diode was developed in the year 1940s, the diode was first exercised as a highpower rectifier, lowfrequency during the year 1952. What are the advantages and disadvantages of a pinondisc. Abstract the present paper investigates experimentally the effect of sliding speed and normal load on friction and wear property of an aluminum disc sliding against stainless steel pin. The coefficient of friction is determined by the ratio of the frictional force to the loading force on the pin.
Before you turn on a switch, think of the consequences. A push pin is pushed through the paper into the cardboard at a location of about 810 cm from the mirror. The objective of this study is to evaluate the feasibility of a new moving pin technique for pinondisc wear testing which is more efficient and able to fully utilize the disc surface area in the wear testing process. By this the wear disc between each grind can used be used for many test by positioning the specimen pins at different diameter wear track diameter on wear disc. The pins, measuring 5 mm in diameter and 5 mm in length, were made of hardened bearing steel aisi 52100 and polished to a surface roughness of r a 0. Experimental objective indian institute of technology madras. The pin on disc tester a quick and easy method of kinetic friction and sliding wear measurement the pin on disc tester measures the friction and sliding wear properties of dry or lubricated surfaces of a variety of bulk materials and relevanttoadsense typestartthin film coatingsrelevanttoadsense typestop. A pinondisc system allows travel in one direction for an unlimited time at a range of linear velocities depending only on position of the pin from the center of the disc. In this case, the sliding path is a circle on the disk surface. In this experiment, the test was conducted with the following parameters.
This paper evaluates using a pin on disc tribotester according to the astm g9995a. The pin can have any shape to simulate a specific contact, but cylindrical tips are often used to simplify the contact geometry. He has 28 years of experience in power transmission and custom coupling design and field service at kopflex, and he has authored and coauthored several lectures and papers on couplings. Jan 01, 2016 pin on disk tribometer alireza borjali.
The principal areas of experimental attention in using this type of apparatus to measure wear are described. The drive unit consists of induction motor 3, which drives the disc through sequential belt transmission 4. Pinondisc machine pinondisc tester was used to study the characteristics of materials, lubricant and so on. While stay and shackle insulators are mainly used in low voltage applications.
Poissons ratio material properties mesh type disk 15,600 mpa 0. In this work, pinondisc test rig was built to find the temperature field during the sliding operation using experimental and numerical approaches. Furthermore, a pin on disc system has been built to measure the temperature field using infrared. Of course, with the disc in place, there will still be some convective loss, as the top of the disc will be warm, but being a poor conductor the disc will have a large temperature difference between its two flat faces, i. The ducom pinball on disk tribometer is a test instrument designed for accurate and repeatable tribological characterization of bulk materials, coatings and lubricants. The test machine causes the disk specimen to revolve about the disk center. During the test, the friction and contact potential would be recorded automatically by the test machine. Coupling credible failure modes and owner options to. Easily changeable holders allow users to quickly change the nature of tribological contact to something that is relevant to their application.
Slider crank mechanism for demonstration and experimentation. Mere conductivity of the experiment without a clear knowledge of the theory is of no value. Results and conclusions the main obtained results are summarized below. This work also presents experimental pin on disc tests with aisi 4140 pins on rotating aisi h discs with normal loads of 10, 35, 70 and 140 n, which represent, respectively, mild, transition and. Initially, pin surface was made flat such that it will support the load over its entire crosssection called first stage. The machine can be used to evaluate wear and friction properties of materials under pure sliding conditions. In the configuration used, the disc rotated about a vertical axis and the pin was held stationary over the disc about the vertical axis. Slider crank mechanism for demonstration and experimentation page 4 design description objective the objective of this mqp is to fabricate a working model of a slider crank mechanism that demonstrates the associated motion and provides means to measure kinematic properties, dynamic forces and cylinder pressure in various states of balance. A ball, rigidly held, is often used as the pin specimen. Polyethylene wear is also dependent on the surface roughness of the disc surface 26,43,76,77 and on the lubricant used during the pod wear experiment.
Lees disc experiment for thermal conductivities physics forums. Requirements for the experiment a tensile specimen correct dimensions b instron mechanical testing machine c vernier caliper brief description of the equipmentmachine universal testing machine uts used for this experiment is a 10 ton capacity instron testing machine. The laser line is directed such that it passes through the push pin, hits the mirror and reflects. Pinondisc tribological tests pod were carried out under dry conditions, using. Unpin the pin and measure the length of the pin after the experiment. Application of pinondisc techniques for the study of. The test machine causes either the disk specimen or the pin specimen to revolve about the disk center. Design of normal force control system for a pinondisk tribometer including active and passive suppression of vertical vibrations doi udk ifac 10. Pin type insulator can be one part, two parts or three parts type, depending upon application voltage in a 11 kv system we generally use one part type insulator where whole pin insulator is one piece of properly shaped porcelain or glass. Due to the influence of the surrounding media on convective heat transfer, the center temperature in any section of a disk or pin specimen was highest and the.
Pressureinduced tribofilm formation with triboconditioning. Wear characteristics analysis of pinondisc pairs based on. For the pinondisk wear test, two specimens are required. During the wear test, loads can be applied either mechanically or pneumatically. Wear testing and wear measurement university of miskolc. This project was carried out the design and fabricate a circular pin disc wear tester with effective cost and efficient wear tester pin on disc used in the metallurgy research field. A pinondisk experimental study on a green particulatefluid.
The experiments were carried out on a tribometer of pindisc type which we designed and realized. To do so, a pinondisc apparatus was designed and fabricated. Each pin can source supply a maximum current of 20ma and sink draw a maximum current of 25ma. Experiment unit the instrument figure 2,a tested at the schematic circuit was created for carrying out the experimental research. It follows that the properties measured in an experiment using a test machine are also a system properties. Pin insulators are the earliest developed overhead insulator, but are still commonly used in power networks up to 33 kv system. Hence the data generated from any properly calibrated. The pin on disc sliding tests were conducted in the following manner. Before each experiment, the disk and pin surfaces were cleaned with acetone. Notice that the metal disc has multiple holes, so you have to push the pin through the correct hole to line up the 45. Machinability assessment of inconel 718 by factorial design of experiment. Pin on disk can simulate multiple wear modes, including. For the experiments, a 100 g normal load was applied with a constant sliding velocity of 100 mms. The stress field distribution and change law of the friction surface are analysed in order to get the mechanism and characteristics of the wear pairs.
Standard test method for wear testing with a pinondisk. Guidance notes on test specimens phoenix tribology. Fully coupled thermalmechanical approach has been developed to find the solution of thermoelastic problem of the sliding systems in dry condition. The metal tag will lay on the ground, and provides a backup method in case pin flags go missing or fade. Pin diode working characteristics and its applications. Figure e location of metal tag step 3 take photos and draw site map photos throughout the experiment, we will regularly. The theoretical stress model of pin on disc pairs are observed according to the model of elastic halfspace and the finite element model of it is built using the software of abaqus. Friction shear stress on the surface of ironbased coating.
Experiments were conducted on a pin on disc wear tester under six different experimental regimes designed to take into account different material conditions of h tool steel and 316l stainless steel. The pinondisc sliding tests were conducted in the following manner. Predicting the polyethylene wear rate in pinondisc. Experiments were conducted on a pinondisc wear tester under six different experimental regimes designed to take into account different material conditions of h tool steel and 316l stainless steel. The effect of sliding speed and normal load on friction and. One, a pin with a radiused tip, is positioned perpendicular to the other, usually a. This interaction between two surfaces of moving parts of the metal have to be controlled by lubrication flow whose function to reduce friction and wear, prevent oxidation and also corrosion on the metal surface contact. The experiments were carried out on a tribometer of pin disc type which we designed and realized. Experimental study on the effect of different speed using pin. Procedure unscrew to loosen the sliding plate, move it to the desired position say at 60 mm by looking at. Furthermore, a pinondisc system has been built to measure the temperature field using infrared. The results show rbd palm olein is lower than hydraulic oil for coefficient friction and wear scar diameter lubricated with rbd palm olein lower at low and high speed compared to the hydraulic oil. Do not start the experiment until the experimental setup is verified. More than 20 distinct operating conditions were investigated using spherical 6.
The occurrence of an intrinsic layer can significantly increase the breakdown voltage for the application of high. Design and manufacturing of a pinondisk wear testing. Pdf this project was carried out the design and fabricate a circular. The scheme of pin 2 on disc i contact was implemented mechanically figure 2,b. Students should come with thorough preparation for the experiment to be. Rotary pinball on disk tribometer ducom instruments. The theoretical stress model of pinondisc pairs are observed according to the model of elastic halfspace and the finite element model of it is built using the software of abaqus. Astm g99 for the evaluation of results in pinondisc tribological tests. One, a pin is positioned perpendicular to the other, usually a flat circular disk.
Then a pin on disk temperature field model was established via the finite element method, and the steadystate temperature distributions for the pin and the disk were analyzed. Wear characteristics analysis of pinondisc pairs based. Problems during interaction between two metal contact surfaces when friction, wear and excessive heat occurred. This steam causes the metal disc to heat up and transfer heat to. Note that pin is not referenced in this code example. Types of insulators in transmission lines electrical4u. Lees disc experiment for thermal conductivities physics. The disc diffusion method for antibiotic susceptibility testing is the kirbybauer method. It was concluded, that a pinon disk wear testing apparatus which is working properly is successfully designed. Pinondisc study of tribological performance of standard and. A pin on disc system allows travel in one direction for an unlimited time at a range of linear velocities depending only on position of the pin from the center of the disc.
The effect of sliding speed and normal load on friction. Either disc or pin can serve as specimen, while the. Experimental study on the effect of different speed using. A pin on disc tribometer consists of a stationary pin that is normally loaded against a rotating disc. Materials are tested in pairs under nominally nonabrasive conditions. The experiment is divided into three parts which the first two parts are carried out by using plint te67 pinondisc wear test machine and the last part is by a twodiscs wear test machine. A wide range of factory installed and field upgradable options make. Sep 19, 20 of course, with the disc in place, there will still be some convective loss, as the top of the disc will be warm, but being a poor conductor the disc will have a large temperature difference between its two flat faces, i.
The agar used is meullerhinton agar that is rigorously tested for composition and ph. Temperature field analysis of pinondisk sliding friction. This pin sets the followthrough angle, or how far the catapult arm will keep moving after it makes contact with the ball. May 16, 2016 in this work, pin on disc test rig was built to find the temperature field during the sliding operation using experimental and numerical approaches. Temperature analysis of a pinondisc tribology test using. Before the experiment, all specimens were cleaned in an ultrasonic bath, first. For all experiments, the normal load on the pin was the same and was set to 7 n. The specimens are produced by dmd as cylindrical pins and annular paddings coated on mild steel substrate.
In research of materials, coatings and lubricants standardized tests are used to improve the reproducibility and for simplicity. The overlap parameter also applies for reciprocating tests, but here there is not the temptation to use the equivalent of different pin on disc track diameters, as one sensibly keeps the stroke the same. For this experiment, you will keep the followthrough angle constant. In a pinondisc wear tester, a pin is loaded against a flat rotating disc specimen such that a circular wear path is described by the machine. Further the depth of the agar in the plate is a factor to be considered in the disc diffusion method. Experiments were carried out under normal load 1020 n, speed. It is equipped with a strain gauge sensor allowing simultaneous measurement and without interference of the normal and tangential efforts during the test of wear 2. Design of normal force control system for a pinondisk. The purpose of this project is to study the application of the principle of friction on a pin into. Before the start of each experiment, precautionary steps were taken to make sure that the load was applied in normal direction. Our engaged experts use this method to evaluate the performance of a wear couple or to characterize the performance of different materials against a standard surface. Experimental and numerical analysis of dry contact in the pin. Remove the rubber band and slip the hole of the metal tag through the pin flag.
A pinondisc study of the tribology characteristics. Experimental and numerical analysis of dry contact in the. Since the pinondisk test method does not attempt to duplicate all the conditions that may be experienced in service for example. The friction property of the ncd coatings was characterized using a pinondisc sliding wear test. Pin on disk testing standards in research of materials, coatings and lubricants standardized tests are used to improve the reproducibility and for simplicity. In a pin on disc wear tester, a pin is loaded against a flat rotating disc specimen such that a circular wear path is described by the machine. Although bovine serum is typically used as lubricant for pod wear experiments in the context of. Design of normal force control system for a pin on disk tribometer including active and passive suppression of vertical vibrations doi udk ifac 10. The central pin of the potentiometer is connected to analog pin o in the arduino board the negative pin on the potentiometer is connected to ground. Pin on disk testing provides a method of characterizing the wear between two materials. The 16 io pins on the bs2 at any given time can sourcesink a maximum of 40ma50ma. Pdf application of pinondisc techniques for the study of.
A leveling laser is set to line setting and placed with its flattest edge on the sheet of paper. In the experiment, water is heated to produce steam, which is then pushed through a steam chamber which is directly above one of the metal discs with a thermometer in it. Wear behaviour of dmdgenerated highstrength steels using. The pin diode is an alteration of the pnjunction for particular applications. Assuming that the hole is close to the cornea, the airy disc has a radius about r 1.
The experiment was carried out on an okuma model ls30n computer numerical control cnc lathe with a g96 constant speed command. Pinondisk wear test an overview sciencedirect topics. Jan 07, 2019 pin, suspension, and strain insulators are used in medium to high voltage. Pin on disk, pin on ring, pin on flat, ball on flat tests are all similar to each other with the differences in the geometry of a specific tribometer and the pin. Design and manufacturing of a pinondisk wear testing apparatus.
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