JPS6042357Y2 - Friction and wear test equipment - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a testing device for testing the degree of friction and wear due to minute reciprocating motion.

FIG. 1 shows a schematic diagram of a conventional test device.

The conventional testing device has a vibrating specimen 01 arranged in the vertical direction and vibrating in the vertical direction, and a pair of fixed specimens 02 on the left and right on the same straight line orthogonal to the vibrating specimen 01.
The fixed specimen 02 is arranged so that one side is in contact with both sides of the upper test specimen 01 from the horizontal direction. .

Note that the other sides of the two fixed specimens 02 are connected to a load device 04.

After the fixed specimen 02 is pressed inward by the loading device 04 and the vibrating specimen 01 is clamped, the vibrating specimen 01 is vertically vibrated by an appropriate means (not shown), and the degree of friction and wear of the vibrating specimen 01 is measured.

However, in this device, since there is a gap between the support base 03 and the fixed specimen 02, the fixed specimen 02 also vibrates in the vertical direction with the vertical vibration of the vibrating specimen 01, and a predetermined gap is created between the two. It is difficult to give the relative slip amplitude.

2 The direction of the load from the left and right is not in a straight line, and the vibration specimen is 0
The contact position between 1 and the left and right fixed specimens 02 is asymmetrical, resulting in a one-sided vassal state.

3. A slight slip occurs between the support base 03 and the fixed specimen 02, causing damage.

There were drawbacks such as.

The present invention eliminates these drawbacks, and consists of a vibrating test piece that is arranged vertically and reciprocates in the vertical direction, and a vibrating test piece that is arranged above the test piece at a position perpendicular to the axis of the test piece. axis,
a pair of fixed specimens having one end coaxially supported and the other end sandwiching the vibrating specimen from both sides; The present invention provides a friction and wear testing device characterized by comprising a load device that pressurizes the friction and wear test device.

An embodiment of the present invention shown in FIG. 2 will be described below.

1 is a vibrating test piece disposed vertically and vibrates in the vertical direction by an appropriate means (not shown); 7 is disposed above the test piece 1 at a position orthogonal to the axis of the sample 1; One end of each of a pair of load arms 4 is supported by a coaxial shaft 7, and a fixed specimen 2 is attached to the other end of each arm 4 via a mounting jig 3. .

The fixed test piece 2 is in contact with the same point on both sides of the vibration test piece 1, and the vibration test piece 2 is connected to the vibration test piece 1 via a steel ball 11 by a loading device 12 consisting of a spring arranged symmetrically with respect to the vibration test piece 1. Pressure is applied to piece 1.

In addition, 8 is a balance weight, and 9 is a nut, which is attached to each load arm 4, and is adjusted so as to completely remove the load due to the arm 4's own weight on the vibrating specimen 1 of the fixed specimen 2 on both the left and right sides. can do.

Reference numeral 10 denotes a shrink fit material disposed at the lower end of the load arm 4 at the contact portion with the steel ball 11, and is made of hard metal to prevent damage.

Now, by applying an equal test load to the left and right sides of the pair of fixed specimens 2 arranged symmetrically in this way from the sides by the loading device 12, the fixed specimens 2 are placed on both left and right sides of the vibration specimen 1.
contact each other.

Thereafter, the vibrating specimen 1 is slightly vibrated in the vertical direction to perform a friction/wear test.

Therefore, according to one implementation of the present invention, 1. Once the left and right center lines of the mounting jig 3 are set on the same straight line, the vibration specimen 1 and the fixed specimen 2 will not come into contact even after the fixed specimen 2 is replaced. The parts are always kept on the same straight line with left-right symmetry, and there is no uneven contact.

2. Micro-slips occur only at the contact area between the vibrating specimen 1 and the fixed specimen 2, and there is no damage due to micro-slips between the conventional type of fixed specimen 2 and the support, so the applied load is always constant and the friction Force measurement becomes easy.

3 The fulcrum of the load arm 4 and the contact parts of the fixed specimen 2 and the vibrating specimen 1 are placed almost on the same line, and the rigidity of the load arm 4 is increased, so that the fixed specimen accompanies the vertical vibration of the vibrating specimen 1. 2
It is possible to eliminate vibrations in the vertical direction.

Next, we will show an example of an experiment using this device.

The device is 5-3000H2 for vibration specimen 1 and 10-1OO
It is possible to apply minute vibrations of 0 μ to the point contact between the left and right sides of the vibrating specimen 1 and the spherical surface of one side of the fixed specimen 2.
It has the function of being able to apply a test load of kg.

Therefore, the test load was set to 5.0 kg and the vibration test piece 1 was applied at 50 Hz.
When tested for 6 hours by applying 100μ microvibration,
The test results were almost the same for the left and right sides without any unevenness.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram of a conventional device, and FIG. 2 is a partially cutaway side view showing an embodiment of the device of the present invention. 1... Vibrating specimen, 2... Fixed specimen, 7
...Axis, 12...Load device.

Claims (1)

[Scope of utility model registration request] A vibrating specimen that is arranged vertically and reciprocates in the vertical direction,
a shaft disposed above the specimen at a position perpendicular to the axis of the specimen; a pair of fixed specimens having one end coaxially supported and the other end sandwiching the vibration specimen from both sides; A friction and wear testing device comprising: a load device that is arranged symmetrically with respect to the vibrating specimen and pressurizes the vibrating specimen via the fixed specimen.