JPH03118442A - Abrasive-friction measuring apparatus - Google Patents

Abstract

PURPOSE:To measure the friction coefficient of a test piece based on a vertical load and a horizontal load by moving the test piece on which the vertical load is applied horizontally in a repeating mode so as to abrade the test piece. CONSTITUTION:A compressing screw 3e is screwed in, and a spring 3a is compressed. A vertical load is applied on the frictional surface of a test piece 1. The vertical load is measured with a load cell 3d. The test piece 1 undergoes frictional action under the specified vertical load by the horizontal repeating movement of a moving stage 5. At this time, a fixing-tool main body 4a is arranged so as to hold a test piece holding tool 2. Since the tool 2 is fixed with a fixing screw 4b, the holding tool 2 is not moved in the horizontal direction. The test piece 1 receives the vertical load with the spring 3a and undergoes the frictional action by the movement of the horizontal repeating movement of the moving stage 5 under this state. A horizontal load is generated in the holding tool 2 in the horizontal direction in response to the frictional resistance of the frictional surface of the test piece 1. The horizontal load is measured with a load cell 6a through a pressure sensitive rod 6b which is in contact with the tool 2. Then, the friction coefficient of the frictional surface of the test piece 1 can be measured based on the vertical load from the load cell 3d and the horizontal load from the load cell 6a.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an abrasion friction measuring device, and more specifically, after measuring the abrasion performance of a material having a friction surface of a minute area, it immediately measures the friction coefficient. This invention relates to a wear friction measurement device that can measure wear and friction.

[Prior Art] Conventionally, as a device for measuring the coefficient of friction of a material having a friction surface of a minute area, the 51st! A vertical load N from a spring 3a as shown in 1 is applied to the specimen holder 2 through a block 3b having a convex spherical surface, and the moving stage 5 is moved while concentrating the load on the friction surfaces of the specimens 1 and 1. The horizontal load F when the specimen holder 2 moves horizontally due to the frictional resistance on the friction surface is measured using the pressure-sensitive rod 6b and the load cell 6a, and the vertical load N and horizontal load F are A device is known that calculates the coefficient of friction from

[Problems to be Solved by the Invention] In the prior art described above, when the moving table moves horizontally, the test piece held in the test piece holder also moves according to the magnitude of the frictional resistance on its friction surface. , are linked together, making it unsuitable for measuring wear performance.

Therefore, in order to measure the friction coefficient after measuring the wear performance, it was necessary to previously measure the wear performance using a separate device.

However, in the above method, after the wear performance is measured, when the test piece is moved from one device to another, changes in the measurement environment may occur on the surface of the test piece, such as moisture adhering to the surface, etc. It was not possible to accurately measure the coefficient of friction.

The present invention has been made in view of the problems of the prior art described above, and its purpose is to provide an abrasion friction measuring device that can measure the friction coefficient of a friction surface immediately after measuring the abrasion performance of a material. There is a particular thing.

[Means for Solving the Problems] The wear friction measuring device of the present invention includes a test piece holder that holds a test piece, a movable table that repeatedly moves horizontally with respect to the friction surface of the test piece, and a It has a loading device that applies a vertical load of It is characterized by:

Furthermore, on the top surface of the moving table, it is possible to place a friction object against the friction surface of the test piece, and the friction object can be made of the same material as the test piece, a material different from the test piece, an abrasive material, etc. is placed.

Further, the loading device is not particularly limited, such as one that utilizes the repulsive force of a spring or one that utilizes the vertical load of a weight.

[Function] The function of the abrasion friction measuring device of the present invention is that the test piece is fixed against horizontal movement by a fixture that prevents horizontal movement of the test piece holder, receives a vertical load by a loading device, and repeats the movement of the moving table. The friction surface of the specimen is worn out by horizontal movement.

In addition, by removing the fixture, the specimen holder becomes movable, and the specimen holder moves horizontally due to the frictional resistance caused by the friction coefficient of the friction surface of the specimen against the horizontal movement of the moving table. At this time, the pressure of the horizontal movement of the test piece holder is measured by a horizontal load measuring device.

[Example] An example of the wear friction measuring device of the present invention will be described based on the drawings.

FIG. 1 shows the configuration of a first embodiment of the wear friction measuring device of the present invention.

This example shows an example in which test pieces 1 and (2) made of the same material are arranged above and below with a friction surface interposed therebetween and are rubbed against each other.

As shown in FIG. 1, a test piece holder 2 that holds one side of the test piece 1.1, a movable table 5 that holds the other side of the test piece L1 and rubs the friction surface of the test piece L1, The test piece 1.
A loading device 3 that applies a predetermined load to the specimen holder 1, a fixing device 4 that prevents the horizontal movement of the specimen holder 2 and is detachable, and a moving stage 5 that is brought into contact with the specimen holder 2. It consists of a horizontal load measuring device 6 that measures the moving pressure of the test piece holder 2 that moves horizontally in conjunction with the horizontal movement.

The loading device 3 is a disk-shaped block 3 having a spherical convex portion.
b, a spring 3a, a cylindrical block 3C, a load cell 3d, and a pressure screw 3e.

The block 3b is arranged with a spherical convex portion in contact with the upper surface of the test piece holder 2, and the spring 3a is arranged on the disk of the block 3d.

A block 3c is arranged above the spring 3a, and is vertically slidably inserted and supported by a flat plate-shaped load device support stand IO protruding horizontally from the column 9, and a load cell 3d is arranged on the upper surface of the block 3C. has been done.

The pressure screw 3e is located on the top of the load cell 3d and is arranged to be screwed into a flat pressure screw base 12 that protrudes horizontally from the support 9, so that the screw tip of the pressure screw 3e is attached to the load cell 3d.
It has a structure that presses the

The fixture 4 includes a fixture main body 4a that can be attached to and detached from the support 9;
It consists of a fixing screw 4b that fixes the fixture main body 4a to the support column 9.

The fixture main body 4a has two parts so as to sandwich the specimen holder 2.
It has a book-like arm and is shaped like a long U-shape so as to hold the support 9, and is fixed to the support with a fixing screw 4b.

The operation and functions of this embodiment will be explained below based on FIGS. 1 to 3.

In the wear performance measurement, the spring 3a is compressed by screwing the pressure screw 3e downward, thereby applying a predetermined vertical load to the friction surface of the test specimen 1.1.

The magnitude of the vertical load is measured and confirmed by the load cell 3d.

Test piece 1.1 is obtained by repeatedly moving the moving stage 5 horizontally.
is rubbed under a given vertical load.

At this time, the fixture main body 4a is arranged so as to sandwich the test piece holder 2, and is fixed with the fixing screw 4b, so that
The test piece holder 2 is prevented from moving in the horizontal direction.

While the test pieces 1, 1 are receiving a vertical load from the spring 3a, the friction surfaces of the test pieces 1, 1 are rubbed by repeated horizontal movement of the movable table 5 that holds one of the test pieces 1, 1 to measure the wear performance.

To measure the friction coefficient immediately after measuring wear performance, loosen the fixing screw 4b, remove the fixture body 4a, and insert the pressure-sensitive rod 6b of the horizontal load measuring device 6 into the test piece holder 2.
The moving table 5 is brought into contact with the pressure-sensitive rod 6 along the horizontal movement line.
Move horizontally in the direction opposite b.

At this time, the test specimen holder 2 is now movable in the horizontal direction.
In addition, a horizontal load is generated in the horizontal direction depending on the magnitude of the frictional resistance on the friction surface of the test piece 1.1, and the horizontal load is measured by the load cell 6a through the abutting pressure sensitive rod 6b.

As shown in FIG. 3, the friction coefficient is determined by the calculator 8 from the vertical load N from the load cell 3d and the horizontal load F from the load cell 6a.

FIG. 4 shows a second embodiment of the friction and wear measurement device of the present invention, and this embodiment is a combination of the first embodiment and the test piece holder 2.
Since the fixing device 4 for fixing is different, this point will be mainly discussed.

The fixture 4 that prevents horizontal movement of the specimen holder 2 during wear performance measurement includes a fixture main body 4a, a fixed screw 4b,
It is composed of a fixed bottle 4c, a spring plunger 4d, and fixed plates 4e and 4f.

The fixture main body 4a has two arms so as to sandwich the specimen holder 2, and a shaft 11 provided at one end of the loading device holder 10.
It can be rotated about the shaft 11, and when the test specimen holder 2 is fixed, it is suspended downward and fixed by a fixing plate 4f.

A 7-shaped groove is dug in the upper surface of the tips of the two arms of the fixture main body 4a, and a bottle 4C is placed in the groove, so that the specimen holder 2 is connected to the two arms of the fixture main body 4a. horizontal movement in the parallel direction.

In addition, the spring plunger 4d is attached to the tip of a thin fixing plate 4e that can be rotated by a fixing screw 4b on the column 9, and presses the specimen holder 2 with a predetermined force for the purpose of supporting the function of the bottle 4C. are doing.

Since the test piece holder 2 is fixed in the above configuration, the wear performance can be measured.

Also, remove the bottle 4C, loosen the fixing screw 4b, rotate the fixing plate 4e to remove the spring plunger 4d from the set position, remove the fixing plate 4f, rotate the fixing device main body 4a around the shaft 11, and then By removing the specimen holder 2, the specimen holder 2 can be horizontally moved, and the friction coefficient of the friction surface can be measured.

[Effect of the invention] According to the wear friction measuring device of the present invention, it has the above configuration,
The test piece is fixed against horizontal movement by the fixture that fixes the test piece holder, and the vertical load is applied by the loading device, and the friction surface of the test piece is abraded by repeated horizontal movement of the moving table, resulting in material wear. The performance can be measured, and by removing the fixture, the test piece holder becomes movable, and the test piece holder moves due to the frictional resistance caused by the friction coefficient of the friction surface of the test piece against the horizontal movement of the moving table. The test specimen holder moves horizontally in conjunction, and the pressure of the horizontal movement of the test piece holder at this time is measured by a horizontal load measuring device, and the coefficient of friction is determined from the vertical load.

In this way, wear measurement and friction coefficient can be measured with the same measuring device without changing the setting of the test piece, so it is possible to measure the friction coefficient of the friction surface immediately after measuring the wear performance of the material.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a first embodiment of the wear friction measuring device of the present invention, and FIG. 2 is a perspective view showing the same as above when measuring the friction coefficient.
FIG. 3 is an explanatory diagram of the data acquisition state in Example 1. FIG. 4 is a perspective view showing the second embodiment of the wear friction measuring device of the present invention, and FIG. 5 is an explanatory diagram of the schematic configuration of the conventional example. It is.

Claims (1)

[Claims] (1) A test piece holder that holds a test piece, a moving table that repeatedly moves horizontally against the friction surface of the test piece, a loading device that applies a predetermined vertical load to the test piece, and a 1. A wear friction measuring device comprising: a horizontal load measuring device that comes into contact with the horizontal load measuring device to measure the horizontal load; and a detachable fixture for fixing the test piece holder.