JPH063409B2 - Abrasion test equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a wear test apparatus, and more specifically, it shows the state of road wear or damage caused by the running of a vehicle or the like particularly in winter or summer. The present invention relates to an abrasion tester that can be measured under the same conditions.

<Prior art and its problems> Conventionally, especially in cold regions, dust pollution due to the use of spike tires or road cracks due to the temperature difference between winter and summer has occurred, and while improving spike tires, etc. There is also a demand for research on road materials that are less harmful even under the circumstances.

However, even if a road material with considerable performance is obtained, there is almost no device that can test the performance as a device that tests the performance, and therefore,
The method of actually using it on the road and seeing the result is generally practiced.

In addition, there are road materials for cold regions and road materials for the purpose of preventing the flow of road surfaces that can withstand high temperatures, even if simply called road materials.To test these road materials, set the tester itself to a low temperature. However, it is necessary to set the temperature to a high temperature, which is very troublesome and has a large cost problem.

<Means for Solving the Problems> In view of the above problems, the present inventor has developed a wear test apparatus capable of easily setting a low temperature and a high temperature regardless of whether it is a road material for cold regions or high temperatures. As a result of examining to obtain,
This invention was reached.

That is, the present invention has a working table having a diameter smaller than that of the turntable body on the turntable body, and a test piece fitting portion is provided on the turntable body outside the working table. A cooling or high temperature chamber is installed on the turntable, and a polishing body that can move upward and downward is attached to the upper part of the turntable body on the side opposite to the cooling or high temperature chamber, and the test is performed on the turntable under low or high temperature conditions. Provided is a wear test device capable of measuring the degree of polishing of a test piece by bringing a polishing body having a predetermined speed and load into contact with the piece while rotating.

According to the test apparatus of the present invention, it is possible to easily switch between low temperature and high temperature, and the polishing body is not limited to the spiked tire, and other polishing bodies can be mounted, and a test that is practical is performed. It is possible.

<Operation> Hereinafter, the first embodiment of the device of the present invention will be applied to road materials.
~ It demonstrates with reference to FIG.

The device of the present invention is roughly classified into a road material test piece,
It comprises a turntable main body having a chamber that can be cooled or set to a high temperature, and a polishing body that can move up and down and can set a predetermined rotation speed and load.

1 is a side view of the apparatus according to the present invention, FIG. 2 is a plan view, and FIG. 3 is a front view.

In FIG. 1, reference numeral 1 is a turntable body, and the turntable body 1 is fixed by a turntable shaft 2 to a shaft stand 3 on a base frame 7 by a flange unit 4. A work table 5 having a diameter smaller than that of the main body 1 is fitted on the turntable main body 1, and a road material test piece 6 (hereinafter simply referred to as the test piece 6) around the work table 5 is fitted.
A plurality of test pieces 6 are fitted into the fitting portion in a fan shape.

Reference numeral 8 denotes a chamber provided on the upper surface of the turntable main body 1 on the half circumference thereof, and is fixed to the work table 5 and the outer frame 13 of the turntable main body 1. A nozzle 9 for discharging liquefied nitrogen and a heater 10 are installed on the ceiling of the chamber 8 so that the chamber 8 can be a cooling chamber or a high temperature chamber. Although the temperature for setting the cooling chamber or the high-temperature chamber reaches a preset temperature, a thermocouple arranged on the side surface of the chamber 8 is aware of the fact that the switch is not shown, and the switch is turned on by an automatic control panel (not shown). Operate.

Reference numeral 11 denotes a geared motor, which is a test piece in which the upper half chamber 8 of the turntable body 1 is made into a cooling chamber or a high temperature chamber of a predetermined temperature by liquefied nitrogen or a heater and fitted into the outer periphery of the turntable body 1. 6 Rotate the turntable to bring the whole to a predetermined temperature. At that time, the base frame 7 should be in contact with the lower surface of the turntable body 1.
The rubber lining wheel 12 installed above assists the rotation.

Next, 14 is a polishing body that directly applies pressure and wear to the test piece (a spike tire is shown in this drawing), and this polishing body 14 is connected to a V pulley 16 by a shaft 15 and drives. The other V pulley directly connected to the motor 19
It is designed to rotate with a V-belt 18 that is stretched over 17 and.

The polishing body 14 is shown in contact with the test piece 6 in FIG. 1. It is shown that the polishing arm 14 is connected to the support arm 23 directly connected to the test body cover 22 and the L-shaped support arm 24 on the floating joint 21. Pivoted, floating joint 21
By operating the pressurizing air cylinder 20 with the guide rollers 26 on both sides of the support bracket 25.
4, the drive motor 19 rotating the polishing body 14,
It is designed to be able to move up and down together with the V pulleys 16 and 17 around which the V belt 18 is attached.

Thus, by rotating the polishing body 14 by applying a predetermined rotation speed and load to the test piece 6 on the turntable body 1 set to a predetermined temperature, a speed corresponding to the rotation speed of the polishing body 14 can be obtained. Then, the turntable body 1 rotates.
Therefore, the frictional rotation of the test piece 6 and the polishing body 14 is performed for a predetermined time, and the wear degree of the test piece can be observed.

Although not shown in the drawing, the setting of various conditions in the apparatus of the present invention is performed by an automatic control panel.

The apparatus of the present invention has the above-mentioned configuration. The first feature of the apparatus is that the wear test on the test piece 6 in both low temperature and high temperature atmospheres can be easily switched.

That is, the pipe from the liquefied nitrogen cylinder (not shown) is the chamber 8
It is connected to the liquefied nitrogen nozzle 9 inside, and the liquefied nitrogen gas is supplied to the chamber 8 by setting a predetermined temperature with an automatic control panel connected thereto.
If it is jetted into the inside, the inside of the chamber 8 can be easily cooled to a predetermined temperature. In this cooling process, if the turntable body 1 in which the test piece 6 is fitted is rotated by the geared motor 11, The entire test piece 6 on the turntable body 1 can be cooled to a uniform temperature in a short time.

Then, after that, the turntable body 1 is stopped, and at the same time, the polishing body 14 rotating at a predetermined speed is lowered, and a required load is applied to bring the test piece 6 into contact with the test piece 6.
Also, the degree of wear of the test piece 6 after a predetermined time is rotated by observing it.

When the test piece 6 is to be tested at a high temperature, the temperature inside the chamber 8 is raised by the heater 10 attached to the chamber 8 and the turntable body 1 in which the test piece 6 is fitted is run to perform the test. The entire piece 6 may be brought to the required temperature, and thereafter, the abrasion test with the polishing body 14 may be performed in the same manner as in the case of the low temperature described above.

Thus, in the apparatus of the present invention, since both the nozzle for liquefied nitrogen and the heater are installed in the chamber 8 provided on the turntable body 1, only from the low temperature to the high temperature, or vice versa, only in the chamber 8. Therefore, it is possible to improve the test efficiency, reliability, and downsizing of the test equipment, which are incomparable to the conventional test methods in which the entire room where the test equipment is installed is set to low temperature or high temperature.

Further, in the conventional testing machine, since the test piece is stationary and only the polishing body such as the tire is rotated, two or more tires are used. Therefore, considerable pressure and cylinder are required. In the apparatus of the invention, the turntable itself in which the test piece is fitted also comes into contact with the polishing body and rotates in the horizontal direction, so that there is an advantage that a load applied to the polishing body can be small.

As the heater 10 installed in the room 8 in the device of the present invention, a far infrared heater is most preferable in consideration of the influence of sunlight on the road surface, but in addition to this, hot air such as a fuel jet heater and an electric dryer is used. It is also possible to use a type that ejects, and in addition to this, a normal electric heater can also be used.

As shown in FIG. 2, the dust generated during the abrasion test in the present invention is sucked by the dust collector 27 installed at the rear of the polishing body 14, and the dust is removed by the filter 28 before the dust is collected by the dust collector. It should be discharged to the outside through the attached duct.

Further, in the present invention, the polishing body 14 is not limited to the illustrated spike tire, and a tire without spikes or an aggregate having a stud-like shape of the heel of a women's shoe may be used, and the same as in a spike tire. Various test results are obtained.

Further, as a road material test piece to be tested by this device, an additive consisting of 20 to 70 parts of asphalt and 30 to 80 parts of thermoplastic resin is added to the road aggregate by 10% and mixed by heating, and this is loaded into the mold. A fan-shaped test piece having a weight of 4 kg and a pressure of 40 mm, which is made by compacting with a compaction device and then taken out from the mold after cooling, may be used.

This device is not limited to the road materials as described above, and it is also possible to perform an abrasion resistance test on all floor materials such as P tiles, vinyl chloride tiles, linoleum, and wood.

In this invention, the low temperature condition by liquefied nitrogen is -50 to 0
It is desirable to adopt a temperature range of 30 to 80 ° C. or a high temperature condition by a heating source. In the apparatus of the present invention, there is no problem in the test even in the low temperature range of 0 to 30 ° C. or the range outside the high temperature range.

<Examples> Examples of the present invention will be described below.

First, as a road material test piece, a fan-shaped test piece made of the above-mentioned material was prepared.

16 test pieces were laid on the outer circumference of the turntable of the device.

Next, in order to carry out a wear test at a low temperature of -15 ° C on this test piece, after setting the automatic control panel at -15 ° C, the turntable was rotated by the geared motor and simultaneously connected to the liquefied nitrogen nozzle in the room. The liquefied nitrogen valve was opened, and nitrogen gas was spouted into the room, and the test pieces on the turntable were leveled to -15 ° C.

Thus, after making the test piece -15 ℃, add 300kg load to the spike tire (corresponding to 1.2t vehicle assuming 4 wheels), rotate it on the test piece at a speed of 20Km / hr, make contact with the test piece and turn. The table body was rotated for 1 hour.

The apparatus of the present invention can adjust the speed of 0 to 50 Km / hr, but it is preferable to test at a speed of 10 to 20 Km / hr. After that, the spike tire was raised from above the test piece, and the state of wear and abrasion of the test piece due to the spike tire was examined.

<Effects of the Invention> As described above, according to the device of the present invention, a chamber capable of producing both a high temperature atmosphere and a low temperature atmosphere is installed in the semi-circular portion on the turntable. The test piece on the turntable can be set to a predetermined temperature in time, and the temperature, the rotation speed of the turntable, the rotation speed and load of the spike tire, and the test time are all automatically controlled in advance. Since it is carried out by setting it on the board, tests with various patterns can be easily carried out.

Also, since many test pieces can be set, if multiple test pieces of various compounding compositions are fitted at the same time and tested, the difference in wear and the degree of cracking can be found by testing under exactly the same conditions, so the optimum compounding composition It can be said that the test equipment is very suitable for selecting road materials and floor materials.

[Brief description of drawings]

FIG. 1 is a side view of the apparatus of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a front view of the same. 1 ... Turntable main body 5 ... Working table 6 ... Test piece 8 ... Room 9 ... Liquefied nitrogen jet nozzle 10 ... Heater 11 ... Geared motor 12 ... Rubber lining wheel 14 ... Abrasive body 16,17 ... V pulley 18 ... V belt 19 ... Drive motor 20 ... Pressurized air cylinder 21 ... Floating joint 22 ... Specimen cover 23 ... Support arm 24 ... L-shaped support arm 26 ... Guide roller 27 ... Dust collector 28 ... Filter

Claims (2)

[Claims] 1. A turntable body having a diameter smaller than that of the turntable body, the turntable body outside the worktable being used as a test piece fitting portion, and a half-circumferential portion on the turntable body. A cooling or high temperature chamber is installed in the chamber, and a polishing body that can move upward and downward is attached to the upper part of the turntable body on the side opposite to the cooling or high temperature chamber. A wear test apparatus for measuring the degree of wear of a test piece on the turntable by contacting a test piece on the turntable under a high temperature condition with a polishing body having a predetermined speed and a load while rotating the test piece. 2. The polishing body is a spike tire (1).
The wear test device described.