Research into wear resistance of different samples by TABER wear tester معدات اختبار

Product introduction

Motion causes friction, and friction exists between relatively moving parts of mechanical equipment. The abnormal wear caused by friction not only affects people\'s productive activities, but also causes a huge waste of social wealth. Therefore, it is very important to study the wear resistance mechanism and wear resistance of materials. The wear resistance testing machine is the main testing equipment.

It is generally accepted that about 1/3 of primary energy is consumed in friction loss and that about 70% of equipment damage is caused by various forms of wear. Tribology is an interdisciplinary subject that integrates basic knowledge and applied technology. It is a broad scientific and technological field of friction, wear and lubricationthat everyone is familiar with. Its application in engineering includes: tribological design of built-ins, equipment and products, friction consumption and wear control throughout the life cycle, implementation of lubrication engineering measures and research and development of new lubricants. Tribology has an important economic value. In the design of buildings, equipment and products, attention to and application of the very latest scientific and technological knowledge of tribology and the active implementation of tribology design can improve the performance and reliability of buildings, equipment and products and reduce operating costs. Thus improving the competitiveness of buildings, equipment and products in the market.

Using a friction and wear testing machine to perform tribology-related tests is the simplest and most convenient way to test the frictional properties of materials. Comparedand with the actual use test, the test machine has a short test period and low cost, and can control some parameters separately for individual testing, and the flexibility is also very good. Therefore, in the field of tribological research, friction and wear testing machines are widely used in mechanical design. In the field of materials science and other fields, the wear and friction performance test of materials is used to evaluate the wear resistance of materials. In addition, it can also be used to measure the frictional power and coefficient of friction of materials. The friction and wear test machine can easily and clearly demonstrate the mechanism of friction and wear, and play a good role in promoting the learning of friction and wear. Therefore, the friction and wear test machine is also widely used in the learning experiment of tribology.

Using the TABER Wear Tester

There are many types of wear testers, the way they are classified is also different. This article introduces the structure and principle of the TABER wear resistant test machine, to provide a reference for the design and equipment selection of the wear resistant test for researchers.

TABER Abrasion Tester is a kind of abrasion testing machine, it is suitable for fabric, paper, paint, plywood, leather, floor tiles, glass, natural plastic Wait. The test method is that the rotating sample is held against a pair of grinding wheels and a specified load is applied. When the sample rotates, the abrasive wheel is driven to abrade the sample. Lost weight is the weight difference of the sample before and after the test. The optional grinding wheel models are: H18, H22, CS17, S32, S33. It is used in a wide variety of applications including: luggage, carpet, cardboard, clothing, glass, plastic coatings, kitchenramic tiles, metal sheets, paints, varnishes, decorative boards, high voltage plates, plastics, textiles, resilient floor mats, traffic paint, anodization Coats, blankets, electronic components, decorative panels, waxes, labels, leather cases, dental materials, car interior trim, resins , furniture, etc.

1. Composition of TABER Abrasion Tester

TABER Abrasion Tester consists of three parts:

(1) Grinding wheel pressure arm

The grinding wheel is installed at the inside of the double arm, weights are installed on the outside of both arms, as shown in Figure 1, such a structure can be adapted to the replacement of any weights and grinding wheels under this method. The ASTMC1353-2009 described in this document uses the H-22 grinding wheel and the weight of 1000g.

(2) Rotating platform

The rotating platform is used to place and fix samples There is a screw rod with a diameter of 9 mm in the center of the platform, and the drilled sample is placed on the rotating platform by the screw rod and a nut is used to screw it into the threaded rod to fix the sample. The rotating platform can rotate according to the rotation speed set by the equipment.

(3) Operating platform and vacuum cleaner

The operating platform mainly controls the rotating platform of the revolutions and the rotational speed of the equipment. The vacuum cleaner sucks the powder removed from the sample into the dust collection jar.

2. Basic steps of the TABER abrasion tester

The sample is placed on a rotating platform , fixed. Install the grinding wheel on the inside of the grinding wheel pressure arm, install the required weight at the bend and drop it vertically from the vertical direction so that the grinding wheel contacts the sample. Turn on the machine to set the number of times the platform rotates and the rotation speed. Start the spin cycle and turn on the vacuum cleaner. After counting the number of revolutions, lift the pressure arm of the grinding wheel, remove the sample and remove the dust on the surface of the sample with a brush. After the test is completed, the next sample can be reinstalled.

3. Standard ASTMC1353-2009 meaning and method of operation

Standard ASTMC1353-2009 test The method provides a means of quantifying the abrasion resistance of dimensional stone and can be used to compare material property classes. TABER Abrasion Tester in the laboratory To measure the abrasion resistance of the stone size, the test conditions, the pressure between the sample and the abrasive, the iinstallation or voltage of the sample and the type of sample are taken into account. or the number of materials. The sample is rubbed by the double-ended grinding wheel during the test, and depending on the type of abrasive and the sample, the surface of the grinding wheel will also change due to the test sample or other materials.

Test steps

1. Sample preparation and pretreatment

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

Take out the sample, place it in an environment with a temperature of 22±3°C and a humidity of 45~55% to cool down to room temperature, number the cooled samples and weigh them for the first time. The unit is g,accurate to two decimal places. Take out the sample and measure the volume specific gravity.

Install the H-22 grinding wheel on the wear-resistant machine. Before installation, use a caliper with an accuracy of 0.1 or higher to measure the grinding wheel to avoid wear of the grinding wheel after repeated testing. Too large will affect the test results. This standard requires that the diameter of the grinding wheel should not be less than 41.3 mm, otherwise the grinding wheel must be replaced.

2. Testing Process

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

After grinding, remove the sample, use a brush to remove the dust on the surface of the sample, and use a balance with a unit of g and an accuracy of two decimal places placefor secondary weighing. Enter the weighed weight and specific gravity of the volume twice into the formula to calculate the abrasion resistance index of the sample.

Various samples in the market meet the standard ASTMC1353-2009 "Abrasion Resistance of Stone - Rotary Platform, Double-headed Grinding Wheel" and the wear resistance coefficient under the TABER wear coefficient tester , and the standard ASTMC1353-2009 "Abrasion Resistance of Stone - Rotary Platform, Double-headed Grinding Wheel" has its unique character and can be used in conjunction with the domestic standard GB/T3810.7-2006 "Determination of wear resistance of glazed brick surface ", which can be more To objectively represent the wear resistance of glazed tiles through the data, it is used in conjunction with the domestic standard GB/T3810.6-2006 "Determination of the wear depth of unglazed tiles", and the correlation of different samples can be clearly soldrain. The author believes that the method of ASTMC1353-2009 "Abrasion Resistance of Stone - Rotary Platform, Double-headed Grinding Wheel" can better test the abrasion resistance of bricks.

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