Research on the abrasion resistance of TABER abrasion tester on different samples

Movement produces friction, and friction exists between the relative moving parts of mechanical equipment. Abnormal wear caused by friction not only affects people’s production activities, but also causes a huge waste of social wealth. Therefore, it is very important to study the wear resistance mechanism and the wear resistance of materials. The wear resistance testing machine is researched. Key equipment.

It is generally believed that about 1/3 of the primary energy is consumed by friction loss, and about 70% of equipment damage is caused by various forms of wear. Tribology is a cross-discipline that combines basic knowledge and application technology. It is a broad field of science and technology including friction, wear, and lubrication that everyone is familiar with. Its engineering applications include: tribological design of buildings, equipment and products, friction consumption and wear control throughout the life cycle, as well as the implementation of lubrication technical measures and the development of new lubricating materials. Tribology has important economic value. In the design of buildings, equipment and products, attention and application of cutting-edge scientific and technological knowledge of tribology and active tribological design can improve the performance and reliability of buildings, equipment and products, and reduce operating costs. Thereby improving the competitiveness of construction, equipment and products in the market.

　　Using a friction and wear testing machine to conduct tribological related tests is the simplest and most convenient way to test the friction properties of materials. Compared with the actual use test, the test machine has a short test cycle, low cost, and can individually control some parameters for individual tests. The flexibility is also very good. Therefore, in the field of tribology research, friction and wear test machines are widely used in mechanical design, Materials science and other fields conduct material wear and friction performance tests to evaluate the wear resistance of materials. In addition, it can also be used to determine friction power and material friction coefficient. The friction and wear testing machine can demonstrate the friction and wear mechanism simply and clearly, and has a good role in promoting friction and wear teaching. Therefore, the friction and wear testing machine is also widely used in tribology teaching experiments.

Use of TABER Abrasion Tester

　　 There are many types of abrasion testing machines, and their classification methods are also different. This article introduces the structure and principle of the TABER wear-resistant testing machine, in order to provide a reference for researchers in the design of wear-resistant testing and equipment selection.

　　 TABER Abrasion Tester is a type of tester used for abrasion testing. It is suitable for cloth, paper, paint, plywood, leather, floor tiles, glass, natural plastics, etc. The test method is that the rotating sample bears a pair of abrasion wheels and imposes a prescribed load. When the sample rotates, the abrasion wheel is driven to abrade the sample. The abrasion loss weight is the weight difference of the sample before and after the test. The available grinding wheel models are: H18, H22, CS17, S32, S33. It has a wide range of applications, including: suitcases, carpets, cardboard, clothing, glass, plastic coatings, ceramic tiles, metal coatings, paints, varnishes, decorative flakes, high-pressure flakes, plastics, textiles, resilient floor mats, traffic paints, anodizing Layers, blankets, electronic parts, decorative boards, waxes, labels, holsters, dental materials, automotive interior decorations, resins, furniture, etc.

　　1. Composition of TABER Abrasion Tester

　　 TABER Abrasion Tester is composed of three parts:

　　(1) Grinding wheel pressure arm

　　The grinding wheel is installed on the inside of the arms, and the weight is installed on the outside of the arms, as shown in Figure 1. This structure can adapt to any weight and grinding wheel replacement under this method. The ASTMC1353-2009 described in this paper uses H-22 grinding wheels and 1000g weights.

　　(2) Rotating platform

　　 Rotating platform is a platform for placing and fixing samples. There is a 9mm diameter screw rod in the middle. The drilled sample passes through the screw rod and is placed on the rotating platform. A nut is fixed and screwed into the screw rod to fix the sample. The rotating platform can rotate according to the rotation speed set by the device.

　　(3) Control platform and vacuum cleaner

　　The control platform mainly controls the number of revolutions and speed of the rotating platform of the equipment. The vacuum cleaner sucks the powder ground off the sample into the dust collection jar.

　　2, the basic operation steps of TABER abrasion tester

　　 Install the prepared sample on the rotating platform and fix it. Install the grinding wheel on the inner side of the pressure arm of the grinding wheel, install the required weight on the outer side, and drop it vertically from the vertical direction so that the grinding wheel is in contact with the sample. Set the number of rotations and rotation speed of the platform at boot. Start the rotation and turn on the vacuum cleaner. After counting the number of rotations, raise the pressure arm of the grinding wheel, remove the sample, and clean the surface of the sample with a brush to clean the dust on the surface of the sample. After the test is completed, the next sample can be installed again.

　　3, the meaning and operation method of standard ASTMC1353-2009

　　 Standard ASTMC1353-2009 test method provides a method to quantify the abrasion resistance of size stone, which can be used to compare material performance levels. Measure the abrasion resistance of the stone size on the TABER abrasion tester in the laboratory. The influencing factors that can be considered include the test conditions, the pressure between the sample and the abrasive, the installation or stretching of the sample, and the type of sample or the number of materials. . The sample is rubbed by the double-headed grinding wheel during the test. Depending on the type and sample of the abrasive, the surface of the grinding wheel will also change due to the test sample or other materials.

experiment procedure

　　 1. Sample preparation and pretreatment

　　 Select the sample, cut the sample into a square with a size of 100mm×100mm, clean the surface of the sample, drill a hole in the center of the sample, drill a through hole with a diameter of 10mm, and put it in an oven at 60±2°C for 48h.

　　 Take out the sample and place it in an environment with a temperature of 22±3°C and a humidity of 45~55% to cool to room temperature. The samples that have been kept cool are numbered and weighed for the first time. The unit is g and is accurate to two decimal places. Take out the sample and measure its volumetric specific gravity.

Install the H-22 grinding wheel on the wear-resistant machine. Before installation, measure the grinding wheel with a caliper with an accuracy of 0.1 and above to avoid excessive wear of the grinding wheel after repeated tests, which will affect the test results. This standard requires that the diameter of the grinding wheel should not be low. 41.3mm, otherwise the grinding wheel needs to be replaced.

　　2, test process

　　 Install the prepared sample on the turntable of the wear-resistant machine, set the speed to 72r/min and the number of revolutions to 1000, and put down the grinding wheel to start grinding.

　　 Take off the sample after grinding, brush off the dust on the surface of the sample with a brush, and perform a second weighing with a balance with a unit of g and two decimal places of accuracy. Bring the two weighed weights and volume specific gravity into the formula to calculate the wear resistance index of the sample.

All kinds of samples on the market meet the standard ASTMC1353-2009 "Stone Abrasion Resistance-Rotating Platform, Double-head Grinding Wheel" and the wear resistance coefficient under the TABER Abrasion Tester, and the standard ASTMC1353-2009 "Stone Abrasion Resistance-Rotating Platform, Double "Head Grinding Wheel" has its own uniqueness. Combining it with the domestic standard GB/T3810.7-2006 "Determination of the surface wear resistance of glazed tiles", it can more objectively reflect the wear resistance of the glazed tiles of the sample through the data. Using it in conjunction with the domestic standard GB/T3810.6-2006 "Determination of Wear Resistance of Unglazed Bricks", the correlation between different samples can be clearly drawn. The author believes that the method of ASTMC1353-2009 "Stone Abrasion Resistance-Rotating Platform, Double-head Grinding Wheel" can better test the abrasion resistance of bricks.

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