KR20140077559A - Abrasion Tester With Cooling Tip and Vibration Isolation Part and Method For The Same. - Google Patents

Abstract

The present invention has a structure damping loads by vibration in an abrasion testing device generating vibration and possibly measuring maintaining loads, which can damp vibration generated when measuring loads applied on a specimen during abrasion measurement and uses a ball when loads are applied to have one point of contact, thereby reducing error of eccentricity when power is applied. In addition, cooling function is applied in a tip generating friction and accurate temperature heating test of the specimen is enabled through a structure that a testing container which the specimen is loaded is automatically exchanged by temperature. Therefore, if testing under a desired temperature of a tester, test can be performed under an accurate temperature desired by the user.

Description

[0001] The present invention relates to a wear test apparatus having a cooling tip and a vibration damping section, and a test method therefor.

In the abrasion test equipment in which vibration occurs, the load caused by the vibration is damped and the load during holding is measured. In order to reduce the eccentricity against the load applied to the specimen, a point contact is applied and a force is applied.

In the past, there have been few tests for abrasion tests, but many abrasion tests are currently being conducted in automobile and engine manufacturing sites.

Prior to 2010, wear tests were performed at room temperature. However, as the technology developed and materials used at high temperatures developed, it became necessary to carry out tests at high temperatures.

As a result of the high temperature test, it was difficult to obtain data by conducting accurate test because of the thermal expansion and heat shrinkage of the metal itself due to the exposure to the heat as well as the test equipment (instrument) for the test as well as the test specimen.

The most important test factor in the abrasion test is the force applied to the specimen and the temperature of the test conditions.

Many abrasion testers use a localized heating system that heats the specimen loads using normal cartridge heat at temperature conditions.

At this time, the temperature of the specimen load is about the same as the temperature that the user desires. However, there is a problem that the surface of the specimen to be tested is not the temperature desired by the user.

The structure that gives force also applies force by using pneumatic or hydraulic pressure but there is a problem that the force applied to the actual specimen varies depending on the perpendicularity of the main shaft to which the force is applied when the test is directly coupled with the cylinder.

No matter how precise the tool is made, the perpendicularity between the actual specimen and the base material can not be made perfectly. Depending on the perpendicularity, frictional force is applied to the parts supporting the shaft, so that the actual applied load and the force .

Japanese Patent Application Laid-Open No. 10-0611567 relates to a device for testing abrasive properties of a material, in which materials applied to mechanical structures are classified into low temperature / high pressure such as deep sea, vacuum / temperature difference in space, Mechanical properties of materials such as abrasion under various extreme environments can be obtained by simulating the situation of high temperature / high pressure such as inside, but by controlling the pressure automatically, the driving device is located outside the chamber and cooling device and pressure boundary. To an apparatus for testing abrasive properties of a material which can be tested. More particularly, the present invention relates to a test chamber which is provided with a fixing jig for fixing a test piece provided therein, and which provides a test situation simulatively. The test chamber is installed on the circumferential surface of the chamber in a lateral direction, A cooling device for protecting the load cell and the sensor provided inside the driving device from the heat generated in the chamber, which is interposed in the chamber and the driving device, and a high-temperature / high-pressure test environment communicated with the inside of the chamber, And a controller for electrically connecting the hydro-chemical control unit and the drive unit to each other to control and display the load and the uniformity according to the displacement in the chamber, and to control and display the abrasion property of the material. to provide. However, the most important test factors in the abrasion test do not describe the force applied to the specimen and how to control the temperature of the test conditions.

To solve this problem, it is possible to apply a force to the center of the main shaft of the grip by applying a force to the center of the main shaft of the grip by using a strong heat treatment ball and to separate the main shaft and the cylinder, thereby reducing the loss of force on the eccentricity.

Also, by separating the spindle, vibration of specimen and spindle occurs during data measurement. In order to reduce the vibration of the spindle, a spring is installed at the connecting part to improve vibration data of vibration data.

When the temperature is heated, the local heating method does not match the actual test temperature with the temperature of the specimen. However, if a heater is installed after installing the thermal insulation box at the test site and the internal atmosphere temperature is set to the temperature desired by the user, You can test at the exact temperature you want.

If the entire test area is heated, the specimen can be tested at the correct temperature. However, there is a problem that the tip to be subjected to the wear test becomes the temperature to be tested by the user.

The specimen can be cooled to the user's desired temperature and cooled to the point where the tip is connected and the inside of the tip to cool the tip temperature.

In order to transfer the force to the center of the spindle when a force is applied, the load concentrator separates the sensor and the spindle and then uses a first support to make a point contact with the center of the spindle using a ball, .

In addition, a coolant line was included at the center of the tip to prevent the temperature of the specimen and the tip from excessively rising due to friction between the specimen and the tip. The temperature of the specimen and the tip were kept constant due to the cooling effect of the cooling water flow.

In addition, the specimen vessel is subjected to high temperature and low temperature test using two temperature equipment of chamber and furnace, and it is possible to test by changing the temperature equipment according to the temperature used.

It reduces the vibration generated when measuring the load applied to the specimen during the measurement of abrasion, and has a single contact point by using the ball when the load is applied, so that the error about the eccentricity can be reduced. It is also possible to test the specimen at a precise temperature by incorporating a cooling function in the tip generating the friction and automatically replacing the test vessel in which the specimen is loaded with the temperature.

1 shows a front view of a test apparatus for measuring wear of the specimen of the present invention.
2 shows a side view of a test apparatus for measuring the wear of the specimen of the present invention.
3 is a front view of a load applying section of a test apparatus for measuring wear of the specimen of the present invention.
4 shows a flow chart of a method for measuring wear of a specimen using a test apparatus for measuring wear of the specimen of the present invention.

1 and 2 each show a front view and a side view of a test apparatus for measuring wear of the specimen of the present invention. A first driving part 600 capable of moving the test container up and down, a second driving part 700 capable of moving the test container to the left and right, a load applying part 100 for applying a load to the test piece, A fourth driving unit 500 for driving the load applying unit in the left and right direction, a fifth driving unit 200 for rotating only the specimen supporting unit 200, a specimen and tip And a sensor 800 for detecting frictional force.

The load applying unit 100 includes a load concentration unit 110 for concentrating loads on the main shaft, a vibration damping unit 120 for damping vibrations of the load applying unit 100 due to friction with the specimen, And a cooling unit 140 for cooling a portion of the load applying unit 100 which enters into the test container 300. [ . ≪ / RTI >

The load concentrating portion may include a ball 113 and a plurality of first spring portions 112. The vibration damping portion 120 may include a plurality of second spring portions 122 and a spring And a pin for performing the operation.

The cooling unit 140 includes a cooling water inlet 141 for injecting the cooling water line and the cooling water into the load applying unit 100, a cooling water discharging unit 142 for discharging the cooling water, cooling for cooling the discharged cooling water And < / RTI >

The tip portion 130 may also include a cooling portion 140 for cooling the tip in contact with the specimen.

A cooling water inflow portion 141 capable of injecting water and a cooling water discharge portion 142 capable of discharging cooling water are formed inside a portion to be inserted into a portion for forming a temperature atmosphere in the main shaft and cooled by flowing water. The water line of the cooling part can be made so that the cooling of the tip can be made smooth by making a water inlet pipe so that it flows to the end of the specimen tip.

The test vessel 300 may include a heating element located on the inner side of the inner side to heat the inside, a fan for circulating the heated air, and a sample support 310 for loading the specimen. The chamber, which is the case where the heating element is located on one inner surface of the test vessel 300, has a problem in that it is difficult to heat the heating element by 400 degrees or more in the structure, but the temperature distribution is uniform.

The test vessel 300 may include a heating element located on the inner side of the inner side and a specimen support 300 for loading the specimen to heat the inside of the test vessel 300. When the heating element is positioned on the inner surface of the test vessel In furnace, the temperature distribution is not good at temperatures below 500 ° C, but the temperature distribution is better and the temperature can be higher.

The heating element may be a heating element using a coil, a heating element using a radiation, or the like, but is not limited thereto.

In this way, both the chamber and the furnace are used for the high temperature and low temperature tests.

In addition, when the test is performed at 400 ° C after heating at 900 ° C in the heat treatment condition wear test, the test piece can not be tested due to the natural cooling of the test piece if the test is manually performed.

In order to solve these problems, two temperature devices were automatically replaced and the test was made possible.

To this end, the first driving unit and the second driving unit may include a piston, a hydraulic cylinder, and a moving motor so that the test container can be automatically replaced.

Therefore, since the specimen is naturally cooled to about 40-80 degrees per second when it is naturally cooled at high temperature, it can be tested by changing the temperature equipment within about 10 seconds, so it can be replaced automatically in a short time.

2 is a front view of a load applying unit 100 of a test apparatus for measuring wear of the specimen of the present invention, and includes a load concentration unit 110 and a vibration damping unit 120 for applying a load to a tip and damping a force .

The load concentration unit 110 separates the sensor and the main shaft to transmit a force to the center of the main shaft when a force is applied, then makes a point contact with the center of the first support 111 using a ball 113, Can be imposed.

At this time, a plurality of pins are used to connect the first support 111 and the ball 113, and a plurality of second spring parts 112 are inserted into the pin connection part to attenuate the fine vibration, It can be a structure that can move within a certain angle when it occurs.

As a result, eccentricity does not generate a force on the load sensor, and a more accurate load can be imposed.

The vibration damping portion 120 is a portion for attenuating the vibration generated in the test on the main shaft. The spring elasticity value corresponding to the load of the actual equipment to be used can be calculated and installed inside. In order to connect the portion of the ball 113 to which the force is applied to the first spring portion, a certain portion of the groove, such as the angle of the outer diameter of the ball 113 used in the load concentration portion 110, It is possible to solve the problem that the user can not press the center of the display unit 113 because of the deviation.

The vibration damping part 120 holds the second spring part 123 between the second support 121 and the third support 123 and also prevents the second spring part 123 from being deviated by the four pins, It is possible to prevent the derailment by machining the jaws corresponding to the outer diameter of the second spring portion 123 in order to prevent the portion 123 from being deviated. With this configuration, the load transmitted from the actual specimen can be largely attenuated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it should be understood that various changes and modifications will be apparent to those skilled in the art. It is to be understood that the present invention is not limited to the above-described embodiments. Accordingly, the scope of protection of the present invention should be construed according to the following claims, and all technical ideas which fall within the scope of equivalence by alteration, substitution, substitution, Range. In addition, it should be clarified that some configurations of the drawings are intended to explain the configuration more clearly and are provided in an exaggerated or reduced size than the actual configuration.

100: load application unit 110: load concentration unit
111: first support member 112: first spring portion
113: ball 120: vibration damping portion
121: second support member 122: second spring portion
123: third support member 130:
140: cooling section 141: cooling water inflow section
142: cooling water discharge part 200: fifth drive part
300: test container 310: sample holder
400: third driving part 500: fourth driving part
600: first driving part 700: second driving part
800: Sensor

Claims (11)

A test apparatus for measuring wear of a specimen,
A first driving unit capable of moving the test container up and down,
A second driving unit capable of moving the test container from side to side,
A load applying section for applying a load to the specimen,
A third driving unit for driving the load applying unit up and down,
A fourth driving unit for driving the load applying unit from side to side,
A fifth driving unit capable of rotating only the specimen pedestal,
And a sensor for detecting the frictional force of the tip and the tip. The method according to claim 1,
The load application unit
A load concentrating portion for concentrating the load on the main shaft,
A vibration damping portion for damping vibration of the load applying portion due to friction with the specimen,
A tip portion of a pointed shape for collecting and applying the load to the specimen at one point,
And a cooling portion for cooling a portion of the load applying portion that enters the test container. The method of claim 2,
The load-
Wherein the test piece comprises a ball and a spring. The method of claim 2,
Wherein the vibration damping unit comprises:
A plurality of springs, and a pin for preventing the spring from derailing. The method of claim 2,
The cooling unit includes:
A cooling water line, a cooling water inflow part for injecting the cooling water into the load application part, a cooling water discharge part for discharging the cooling water, and a cooling bath for cooling the discharged cooling water again. Test equipment. The method according to claim 1,
Wherein the test container comprises:
A heating element located on one inner surface for heating the inside,
A fan for internally circulating the heated air,
And a specimen pedestal for loading the specimen. ≪ RTI ID = 0.0 > 8. < / RTI > The method according to claim 1,
The test vessel
A heating element located on the inner front surface for heating the inside,
And a specimen pedestal for loading the specimen. ≪ RTI ID = 0.0 > 8. < / RTI > The method according to claim 1,
The first and second driving units
A test cylinder, a piston, a hydraulic cylinder, and a moving motor so that the test container can be automatically replaced. A method for measuring wear of a specimen using a test apparatus according to any one of claims 1 to 8,
(i) selecting one of the test vessels of claim 6 or claim 7;
(ii) aligning the selected test container so as to correspond to a load applying portion of the testing apparatus using the first and second driving portions;
(iii) heating the inside of the test container by flowing an electric current to the heating element in the test container;
(iv) cooling the portion of the load applying unit that enters the test container using the cooling unit;
(v) applying a load to be tested using the third and fourth driving units;
(vi) rubbing the specimen and the tip by rotating the specimen pedestal using the fifth driving unit;
(vii) detecting a frictional force between the specimen and the tip using the sensor;
Wherein the method comprises the steps of: The method of claim 9,
Wherein the load application unit includes a load concentration unit, a vibration damping unit, a tip unit, and a cooling unit. The method of claim 9,
Wherein the lower concentrating portion comprises a ball and a spring. ≪ RTI ID = 0.0 > 11. < / RTI >

Images