JPS6217703Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention mainly relates to an abrasion testing device for testing the abrasion resistance of materials such as metals.

In general, unlike other mechanical properties, the wear characteristics of materials are influenced by the combination of materials in contact with each other, the ambient conditions on the test surface, and the sliding conditions on the contact surface. In addition, there are various types of wear phenomena that occur, such as material fatigue and wear due to scratches, and the phenomena that occur also differ depending on the sliding speed and contact pressure of the contact surface.
The wear resistance of a material cannot be easily determined by a single test method. Therefore, it is necessary to perform the wear test under conditions suitable for the purpose, and for this reason, dedicated wear test equipment is used for each wear test. Moreover, this abrasion test device was devised to provide test conditions similar to the individual's desired conditions, and the test piece is also shaped to suit this purpose, so it is ultimately suitable for abrasion testing of materials. A wide variety of wear test equipment is used.

However, most conventional wear testing devices test the wear characteristics of materials by sliding one material on another, that is, by rubbing solid objects together. For those that quantitatively test the wear of materials in contact with liquid due to jets and slurry fluids, especially when the target is highly wear-resistant materials such as tool steel, cemented carbide, or ceramics, the test period may vary. There were problems in that the process took a long time and it was difficult to produce results in an appropriate period of time depending on the material being targeted.

This invention forms a pressure increase part having a step whose diameter decreases along the certain direction in a part of a circulation path in which a test slurry fluid containing a filler is circulated in a certain direction by a fluid flow means, By attaching and detaching the test piece facing the outlet of the pressurizing section, and detachably attaching a nozzle having a flow path that is smaller in diameter than the outlet at the outlet of the pressurizing section, the above problems can be solved. It is resolved.

This invention will be explained below with reference to the drawings.

1 and 2 show an embodiment of the wear test apparatus A according to this invention, and reference numeral 1 denotes a circulation path for a test slurry fluid B in which a filler is mixed into the fluid. This circulation path 1 includes a test piece 4, which will be described later.
A mounting device 10 for removably mounting the test piece 0 and a fluid flow means 20 for flowing test slurry fluid B toward the test piece 40 mounted on the mounting device 10 are provided.

By the way, the test slurry fluid B is normally stored in a storage tank 2 provided in the circulation path 1, and during the wear test, it is transferred from this storage tank 2 via the switching valve 3 to the fluid flow means 20. Test piece 40 mounted on mounting device 10
The liquid then flows back into the storage tank 2 via a check valve 4.
In addition, the code|symbol 5 is a pressure gauge for measuring the discharge pressure of the test slurry fluid B.

Further, the switching valve 3 is opened and closed by compressed air supplied from a compressed air source 30 via an operating valve 31. The compressed air is separated in front of the operating valve 31 and led to the storage tank 2, pressurizing the tank so that even high viscosity test slurry fluid can be sucked into the cylinder.

On the other hand, as shown in FIGS. 3, 4 and 5, the mounting device 10 has an entrance passage 11a inside.
an inlet member 11 provided with a cylindrical fitting member 11, an outlet member 13 having a through hole 13c in the center into which a cylindrical fitting member 12 is removably fitted, and an outlet passage 13b; It is mainly composed of a mounting member 14 joined to the lower surface, and each of the above-mentioned members is assembled with assembly bolts 15. A step-shaped locking portion 13d is formed at the bottom of the through hole 13c, and this locking portion 1
A nozzle 44 is clamped between the fitting member 12 and the fitting member 12, and a stepped portion 13e is formed in the middle of the fitting member 12 to open the inlet passage 11a.
A pressurizing part 13a whose opening surface to the nozzle 44 has a larger diameter than the opening surface to the nozzle 44 is formed through the nozzle 44, and
The nozzle 44 is formed with a flow path 44a having a smaller diameter than the nozzle-side opening surface of the pressure increasing portion 13a. The mounting member 14 includes the through hole 13.
A communication groove 14a is formed to communicate between the inlet passage 11a of the inlet member 11 and the outlet passage 13b.
is connected to the circulation path 1 on the fluid flow means 20 side via the connecting member 16, and the outlet passage 13b of the outlet member 13
By connecting to the circulation path 11 on the storage tank 2 side via the connection member 16, a part of the circulation path 1 for the test slurry fluid B is formed inside the mounting device 10.

Further, the mounting member 14 includes a fastening member 18.
The test piece 4 is attached via a bolt 19 to the
The mounting member 41 of No. 0 is attached to the through hole 1 of the outlet member 13.
The test piece 40
is mounted on the mounting member 41 by screws 43 so as to constitute a part of the wall of the circulation path 1 in the mounting device 10 . Note that this nozzle 44 may be used as a material test piece.

The fluid flow means 20 is mainly composed of a hydraulic cylinder 21, a discharge cylinder 26 coaxially connected to the hydraulic cylinder 21, and a hydraulic motor 22.
The test slurry fluid B is supplied to the mounting device 10 by sucking oil from the oil tank 23 and sending the oil to the hydraulic cylinder 21 via the electromagnetic operation valve 24 and operating the discharge piston 25 provided inside the discharge cylinder 26. It is designed to flow toward a test piece 40 attached to the test piece 40.

In FIG. 1, reference numeral 6 is a stirring blade for stirring the test slurry fluid B, and reference numeral 27 is a jacket provided around the outer periphery of the storage tank 2 for flowing hot water or the like. Further, in FIG. 2, reference numeral 50 is a control panel for controlling the wear testing apparatus A of this invention.

Next, the wear test apparatus A configured as above
The effect of this will be explained.

First, in order to perform a material wear test, a test piece 40 of the material whose weight has been measured in advance using a chemical balance is mounted on the mounting member 41 provided on the fastening member 18 and fixed with the screw 43. The mounting member 41 is fixed to the mounting member 14 of the mounting device 10 with a mounting bolt 42. Then, the test piece 40 is located below the nozzle 44 and constitutes a part of the wall of the circulation path 1. Note that glass fibers (milled fibers, etc.) and other fillers are mixed in advance in the test slurry fluid B, and the mixed liquid containing this filler can be flowed toward the test piece 40 by the fluid flow means 20. Let's do it like this.

When the above preparations are completed, the control panel 40 is operated to rotate the stirring blade 6 in the storage tank 2 and also to rotate the hydraulic motor 22 of the fluid flow means 20. Then, the solenoid-operated valve 24 is operated and the hydraulic cylinder 21 is
At the same time, the switching valve 3 is opened and closed in synchronization with the electromagnetic operation valve 24, and the discharge piston 25 in the discharge cylinder 26 is moved forward and backward to open the storage tank 2.
Test slurry fluid B is flowed from inside toward the test piece 40 of the mounting device 10.

Then, the test slurry fluid B is applied to the test piece 40 mounted on the mounting device 10 under certain conditions.
When the set number of times has been passed, the experiment is finished, the test piece 40 is taken out from the mounting device 10, and its weight, wear status, and number of discharges of the discharge piston are recorded as data.

In the above, the discharge pressure of the test slurry fluid B can be adjusted by the diameter of the nozzle 44, the discharge flow rate, etc., and can be set according to the type of material to be tested, so that the range of materials to be tested is wide. Note that normally,
Use at 50-200Kg/ ^cm2 . Also, hydraulic cylinder 2
Since test slurry fluid B is discharged by 1,
The number of discharges can be measured using a counter, etc.
It can be used as data. Furthermore, a stepped portion 13e is formed in the pressurizing portion 13a, and the diameter is reduced along the flow of the test slurry fluid B.
Furthermore, since the flow path 44a of the nozzle 44 is smaller in diameter than the outlet of the pressure increasing part 13a, the test slurry fluid B can be discharged from the nozzle 44 at a high pressure while alleviating wear on the nozzle 44 itself. The wear rate of 40 is also fast, allowing early conclusions to be drawn. Since the nozzle 44 can be attached or detached by removing the fitting member 12, the flow path 44a can be designed to obtain effective measurement data during an appropriate test period, depending on the wear rate of the test piece 40 to be tested. It can be easily exchanged for a different diameter. Further, since the test slurry fluid B circulates in the circulation path 1, a large amount of the test slurry fluid B is not required.

By the way, the type of filler mixed in the test slurry fluid B is not limited to glass fiber, and the type can be changed freely.
In addition to freely setting the temperature of slurry fluid B by flowing hot water through the test slurry fluid B, the conditions such as the discharge pressure and discharge flow rate of the test slurry fluid B can also be freely changed and set as described above. It is possible to obtain wear test data under various conditions. Therefore, wear tests suitable for various purposes can be performed using one device.

As explained above, this invention has a step in which the diameter decreases along the certain direction in a part of the circulation path in which the test slurry fluid containing the filler is circulated in a certain direction by the fluid flow means. A pressurizing section is formed, a test piece is removably attached facing the outlet of the pressurizing section, and a nozzle having a flow path whose diameter is further reduced than the outlet is detachably attached to the outlet of the pressurizing section. The test slurry fluid circulated by the fluid flow means is pressurized as it passes through the pressure increasing section and the nozzle flow path, which has a stepped portion, and the jet from the flow path directly hits the test piece, which improves wear resistance. This speeds up the wear rate of even highly sensitive test pieces, allowing early conclusions to be reached, and also slows down the wear rate of the nozzle itself, keeping test conditions stable. Further, since the nozzle is detachable, the ejection pressure can be easily changed depending on the wear rate of the target test piece.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of this invention, in which Figure 1 is a circuit diagram showing the circulation path of the test slurry fluid, Figure 2 is an external view, and Figure 3 is a part of the mounting device. FIG. 4 is a sectional front view, FIG. 5 is an exploded perspective view of the main part. A...Abrasion test device, B...Test slurry fluid, 1...Circulation path, 10...Mounting device, 13a...
...pressure increase part, 13e... step part, 20... fluid flow means, 40... test piece, 44... nozzle,
44a...Flow path.

Claims (1)

[Scope of utility model registration request] A pressurizing part 13a having a stepped part 13e whose diameter decreases along the certain direction is formed in a part of the circulation path 1 in which the test slurry fluid B, which is a fluid mixed with a filler, is circulated in a certain direction by the fluid flow means 20. is,
A test piece 40 is removably attached facing the outlet of the pressure increasing section 13a, and a nozzle 44 having a flow path 44a whose diameter is further reduced from the outlet is detachably attached to the outlet of the pressure increasing section 13a. An abrasion test device characterized in that it is equipped with a wear test device.