JPH0740201Y2 - High temperature strength tester - Google Patents

Description

TECHNICAL FIELD The present invention relates to a high temperature strength tester for performing strength test on a test piece such as so-called fine ceramics in a high temperature atmosphere.

Conventional technology In a typical prior art, for example, an electric furnace having a test chamber capable of heating up to about 1500 ° C is used, and a test jig containing a test piece is provided with the temperature of the test chamber kept at about room temperature. Installed in the test chamber of the electric furnace, and then gradually raising the temperature of the test chamber so as not to give a thermal shock to the test piece and the test jig, and keeping the test chamber at a temperature of, for example, 1500 ° C as described above. Hold the time and perform tests such as bending test. After the completion of this test, the temperature of the test chamber of the electric furnace was gradually lowered, and with the temperature lowered, the test piece and test jig were removed from the test chamber, and a new test piece was placed in this test jig again. Instead, repeat the test using the same procedure.

In such a prior art, since the test chamber of the electric furnace is heated and cooled, the heat capacity of the electric furnace is generally large, and therefore the heating and cooling of the electric furnace takes a long time, for example, 2 to 3 hours. Each requires a degree. Therefore, it is difficult to test many test pieces in a short period of time.

Another prior art for solving this problem is to provide a rotary table that is angularly displaced about a vertical axis in a heat-retaining furnace, and on this rotary table, a test jig containing a plurality of, for example, 12 test pieces, Arranged at intervals around the rotation axis, at the position of the rotation axis, an electric furnace having a test chamber capable of raising the temperature to a high temperature was provided, and each test jig containing the test piece on the turntable was installed. Optionally, it is configured to be automatically inserted into or removed from the electric furnace to perform a bending test or the like.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In such a prior art, the structure for inserting and removing the rotary table and the test jig containing the test piece provided on the rotary table into the electric furnace is complicated. Therefore, there is a problem that it is easy to break down. Further, it is desired to perform the test piece with higher efficiency.

An object of the present invention is to provide a high temperature strength tester capable of continuously performing a high temperature strength test such as a bending test of a test piece with a simple structure and with high efficiency.

Means for Solving the Problems The present invention provides a furnace main body having a heater, a test chamber, and a plurality of chambers that are sequentially formed radially outward of the test chamber. A heating preparation means having a heating chamber that can be operated, a gate that opens and closes between heating chambers formed in the radial direction of the test chamber, and a lower receiving means that receives the lower part of the test jig or the test piece in the test chamber. , A means for raising and lowering the lower receiving means, and an upper receiving means which is provided at an upper position in the test chamber to prevent upward displacement of the test jig or the test piece and receives the upper part of the test jig or the test piece. It is a high temperature strength tester characterized by including.

In addition, the present invention has a heater main body having a built-in heater, a plurality of furnaces that are sequentially formed radially outward of the test chamber, and a plurality of sets are arranged in the circumferential direction so that the heating chamber can communicate with the test chamber. A plurality of heating preparation means having chambers, a gate that opens and closes between the heating chambers formed in the radial direction of the test chamber, and a lower receiving means that supports and receives the lower part of the test jig or test piece in the test chamber. A high temperature which is provided at an upper position in the test chamber and includes an upper receiving means for receiving an upper portion of a test jig or a test piece, and a means for vertically moving at least one of the lower receiving means and the upper receiving means. It is a strength tester.

Action According to the present invention, the test chamber of the furnace body is heated by a heater such as an electric heater, and this state is maintained. Heating preparation means is provided on the side of the furnace body. This heating preparation means has a plurality of heating chambers that can be communicated with the test chamber, are sequentially formed radially outward, and further have a plurality of sets installed above and below, or, alternatively, the circumference of the test chamber. A plurality of sets of heating chambers are arranged in the direction. The heating chambers formed in the radial direction of the test chamber are openably and closably partitioned by a gate. The lower part and the upper part of the test piece or the test jig accommodating the test piece are received by the lower receiving means and the upper receiving means. In the configuration in which a plurality of sets of heating chambers are arranged in the upper and lower directions, the lower receiving means is moved up and down so that the test piece preheated in the heating chamber of the heating preparation means can be received by the lower receiving means. It is displaced up and down by means. In the configuration in which a plurality of sets of heating chambers are arranged in the circumferential direction, it is not necessary to move the lower receiving means up and down when these heating chambers are arranged in the same horizontal plane,
At least one of the lower receiving means and the upper receiving means is configured to be moved up and down.

In this way, the test piece that has been heated up slowly from room temperature to, for example, about 800 ° C. by the heating preparation means is arranged between the lower receiving means and the upper receiving means, and is placed in the test chamber at, for example, 800 ° C. Bending tests are conducted at a constant temperature of up to 1500 ℃. During this test, the remaining heating chamber is preheated and prepared with the test piece to be tested next. The test piece that has completed the test in the test room is slowly cooled down through the heating room and taken out to the outside. During the period in which the test piece after this test is finished is cooled and taken out, the other test piece can be subjected to the temperature rise test in the test chamber. In this way, the temperature rise test of the test piece can be sequentially and continuously performed, and the efficiency is improved.

The heating chambers formed in the radial direction of the test chamber are partitioned by gates so that they can be opened and closed. Therefore, the temperature of the heating chambers can be changed by adjusting the opening of this gate. The gate can prevent the temperature of the test chamber and the temperature of the heating chamber near the test chamber from fluctuating greatly.

The heating chamber closest to the test chamber is connected to the test chamber, and accordingly, the heating chamber closest to the test chamber has a temperature equal to or close to the temperature of the test chamber, and the test piece,
It is possible to carry out the test from the heating chamber closest to the test chamber without causing a large temperature change in the test chamber and further reduce the temperature change in the test chamber.

In general, the heating preparation means can be downsized to reduce the heat capacity as compared with the furnace body. Therefore, improve the efficiency by increasing the rate of temperature change of the test piece and the test jig that houses the test piece with time as long as the test piece and the test jig are not damaged by thermal shock. Can be planned.

Furthermore, in the present invention, the temperature of the test chamber of the furnace body is not changed, but the temperature of the heating chamber of the heating preparation means having a relatively small heat capacity is changed, so that it is necessary for heating the test chamber by the heater. It is possible to reduce various operating costs.

Embodiment FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken along section line II-II of FIG. 1, and FIG. 3 is a front view. FIG. 4 is a partially cutaway perspective view thereof. With reference to these drawings, a furnace body 1 of an electric furnace has a test chamber 3 arranged on a pedestal 2 and having a vertical axis. In the test chamber 3, a plurality of vertically elongated electric heaters 4 having an axis in the vertical direction (in this embodiment, 9
Book) Spaced in the circumferential direction. The furnace body 1 is made of a refractory material, and the inside of the test chamber 3 surrounded by the electric heater 4 and the refractory material is, for example, 800 to 1500.
It is kept at a predetermined constant temperature of ° C. The temperature in the test chamber 3 is detected by the thermometer 5, and the furnace body 1
A lid 7 made of quartz glass or the like is fixed to the outer end of the cylindrical body 6 penetrating therethrough to form a viewing window. The outside of the furnace body 1 is further surrounded by an exterior 8 made of refractory material.

A heating preparation means 9 is provided on the left side portion of the furnace body 1 in FIGS. 1 and 2. This heating preparation means 9
Is made of a refractory material, and has a horizontally extending heating chamber 10 which can be communicated with the test chamber 3 and which is arranged in a plurality of stages (three stages in this embodiment) above and below. This heating chamber 10 is the most testing room 3
It has a first heating chamber 10a near it and a second heating chamber 10b next to it, which is generally indicated by reference numeral 10. As described above, the heating chamber 10 as described above is formed in three stages vertically, as is apparent from FIG. Between these first and second heating chambers 10a and 10b, the heating chambers 10a and 10b move in the extending direction to move in the vertical direction (perpendicular to the paper surface of FIG. 1, vertical direction of FIG. 2).
A movable gate 11 is arranged in the. The gate 11 is made of refractory and is formed in a plate shape. Control rod at gate 11
12 is provided, and this operating rod 12 is moved by an operator or by a driving means such as a fluid pressure cylinder, and airtightly partitions between the first and second heating chambers 10a, 10b,
Alternatively, the opening area and thus the opening can be adjusted. The first heating chamber 10a communicates with the test chamber, and the gate 11 is arranged at a distance from the test chamber 3 to the outside in the radial direction of the test chamber 3 (to the left in FIGS. 1 and 2). ing. As a result, the first heating chamber 10a can be maintained at a temperature substantially equal to that of the test chamber 3 or a temperature slightly lower than the temperature of the test chamber 3, and a test piece 13 described later and a test jig 14 for storing the test piece 13 will be described. It is possible to prevent a sudden change in temperature when the temperature is moved from the first heating chamber 10a to the test chamber 3 and brought. The temperature inside the heating chambers 10a and 10b can be detected by thermometers 50 and 51.

The free end of the second heating chamber 10b can be closed by a lid 15 made of refractory material. The lid 15 can be angularly displaced by a hinge 16 having a vertical axis on one side, and the other side of the lid 15 can be locked and unlocked by a locking means 17.

The heating preparation means 9 is further covered with an outer layer 18 of refractory material to improve the heat insulation. Heating preparation means 9 and outer layer
A heat transfer pipe 19 for cooling is embedded between the heat transfer pipe 19 and the cooling water 18, and cooling water is supplied from the pipe 20 to the heat transfer pipe 19. Is discharged. In this way, it is possible to cool the surfaces of the outer layers of the furnace walls of the first and second heating chambers 10a and 10b in the heating preparation means 9, and the overall furnace can be made compact.

The heater 4 provided in the test chamber 3 is the first heating chamber 10a.
On the side, there is an interval, and therefore, the test jig 14 containing the test piece 13 can be inserted into and taken out from the first heating chamber 10a into the test chamber 3 without the heater 4 interfering with it. You can

A rod-shaped lower receiving member 23 is disposed below the furnace body 1 so as to project into the test chamber 3. The lower receiving member 23 is vertically moved up and down by an up-and-down driving means 24 such as a fluid pressure cylinder or a motor. The upper end portion 23a of the lower receiving member 23
Then, the test jig 14 accommodating the test piece 13 is mounted and supported. The upper receiving member 25 protruding to the upper part of the furnace body 1 is formed in a rod shape having a vertical axis and has an end portion 25a that abuts on the upper end portion of the test jig 14, and the abutting pressure is detected by the load cell. , A strain gauge or the like may be provided.

FIG. 5 is a cross-sectional view of the test jig 14 containing the test piece 13. The test jig 14 is mounted on the upper end portion 23a of the lower receiving member 23 so as to be fitted and attached to the base portion 27, a cap 28 fitted into the base portion 27, and a guide hole 29 of the cap 28 so as to be vertically displaceable. And a pressing member 30 which has a rectangular cross-section, and is interposed between the pressing member 30 above the test piece 13 and a right cylindrical support piece 31 which supports both longitudinal ends of the elongated test piece 13 having a rectangular cross section. And two cylindrical support pieces 32. Test pieces
The support members 32 are arranged between the support members 31 along the longitudinal direction of 13, and thus the bending test of the test piece 13 in the test chamber is performed.

A spherical contact piece 33 is provided on the pushing member 30, and the contact piece 33 contacts the lower end portion 25a of the upper receiving member 25. A base 27 that constitutes the test jig 14, a cap 28, and a pushing member 30.
The support members 31, 32 and the contact piece 33 are made of a material having high heat resistance such as high density SiC. The test piece 13 may be, for example, a fine ceramics.

In performing the bending test of the test piece 13 stored in the test jig 14 in a high temperature atmosphere using the high temperature strength tester shown in FIGS. In the state where 11 is closed, the locking means 17 is unlocked to open the lid 15, the test jig 14 containing the test piece 13 is inserted into the second heating chamber 10b, and then the lid 15 is closed to lock the locking means. Lock with 17 After that, the gate 11 is gradually displaced upward in FIG. 2 and opened to gradually raise the temperature of the second heating chamber 10b. In this way, the test jig 14 containing the test piece 13 is preheated in the second heating chamber 10b from room temperature to about 200 ° C. in about 10 minutes.

Next, with the gate 11 open, the lid 15 is opened and the second
The test jig 14 containing the test piece 13 in the heating chamber 10b is moved from the second heating chamber 10b to the first heating chamber 10a, and the test jig 14 is installed in the first heating chamber 10a. After that, the gate 11 is closed and the lid 15 is closed. Thus, the test piece 13 and the test jig 14
In the first heating chamber 10a for about 10 minutes from about 200 ℃ to about 800
Heated to ℃. In the test chamber 3, the upper end portion 23a of the lower receiving member 23 is provided with the elevating and lowering driving means 24 in order to receive the test jig 14 containing the test piece 13 to be subjected to the high temperature strength test. It is set at a position corresponding to one arranged above and below the first heating chamber 10a.

Next, the gate 11 and the lid 15 are opened, and the first heating chamber 10
The test piece 13 inside a and the test jig 14 containing the test piece 13
Is mounted on the upper end 23a of the lower receiving member 23.
Then, the gate 11 and the lid 15 are closed. Lifting drive means 24
As a result, the lower receiving member 23 is lifted, and the contact piece 33 of the test jig 14 moves the lower end portion 25 of the upper receiving member 25 as shown in FIG.
Set the pressure so that it comes into contact with a and have a predetermined value, and perform a bending test in this state. The temperature in the test chamber 3 is maintained at a predetermined constant temperature in the range of 800 to 1500 ° C. as described above, and this test can be completed in about 10 minutes.

After the test is completed, the lower receiving member 23 is lowered by the elevating and lowering drive means 24 to separate the contact piece 33 and the lower end portion 25a of the upper receiving member 25 into the original first heating chamber 10a. Bring to the corresponding position. Next, the gate 11 and the lid 15 are opened, and the test jig 14 containing the test piece 13 that has been tested is removed from the upper end portion 23a of the lower receiving member 23 and returned to the first heating chamber 10a for installation.
The gate 11 is closed again and the lid 15 is closed. Thus the first
In the heating chamber 10a, the temperature of the test piece 13 and the test jig 14 is lowered to 200 ° C. in about 10 minutes. This temperature adjustment can be performed according to the opening degree of the gate 11.

Next, the gate 11 and the lid 15 are opened, the test piece 13 and the test jig 14 in the first heating chamber 10a are moved to the second heating chamber 10b, and the opening degree of the gate 11 is adjusted or closed. Again lid
15 is closed, whereby the temperature is lowered from about 200 ° C. to a temperature near room temperature in about 10 minutes. Then, with the gate 11 kept closed, the lid 15 is opened, and the test jig 14 containing the test piece 13 for which the test is completed is taken out from the second heating chamber 10b. In this way, a series of test operations is completed. During the period in which the test piece 13 and the test jig 14 to be tested are heated or cooled in the first and second heating chambers 10a and 10b, the temperature is raised in the multistage first and second heating chambers 10a and 10b. The heated test piece 13 and the test jig 14 are tested in the test chamber 3, and thus, the test piece 13 and the test jig 14 can be sequentially and continuously tested in the test chamber 3. .

In this way, when heating and heating the test piece 13 and the test jig 14 in the heating preparation chamber 9, the first and second heating chambers 10a and 10b having a relatively small volume are opened and closed by the gate 11 and the lid 15. Therefore, fluctuations in the temperature of the test chamber 3 can be prevented.
Further, the heat capacity of the heating preparation chamber 9 is smaller than that of the furnace main body 1, and therefore, the rate of change in temperature with temperature rise and decrease with time is
The size of the test piece 13 and the test jig 14 can be increased within a range that does not cause damage due to thermal shock, and since the test piece 13 and the test jig 14 are configured in multiple stages, they can be tested sequentially, reducing the time required for the test. , The efficiency can be improved. Further, the heater 4 is constantly energized in the furnace body 1 having a large heat capacity, the temperature of the test chamber 3 is not raised or lowered, and the test piece is heated in the heating preparation chamber 9 having a relatively small heat capacity. Since the temperature of the heater 13 and the temperature of the test jig 14 are raised and lowered, the amount of heat radiation can be reduced, thereby reducing the operating costs such as the power consumption of the heater 4.

A blower is installed on the outer peripheral surfaces of the outer layers 8 and 18 made of a refractory material to form an air flow layer for heat dissipation, thereby reducing the thickness of the refractory material in the furnace body 1 and the heating preparation means 9, A measuring device or the like may be installed in the vicinity of so that the entire mounting space may be small.

FIG. 6 is a vertical sectional view of another embodiment of the present invention, and FIG. 7 is a horizontal sectional view taken along the section line VII-VII in FIG. This embodiment is similar to the previous embodiment, and corresponding parts bear the same reference numerals. It should be noted that in this embodiment, in addition to the heating preparation means 9, another heating preparation means 9a is provided at different positions in the circumferential direction of the furnace body 1. The heating preparation means 9 and 9a have the same configuration and are configured symmetrically with respect to the axis of the furnace body 1. By doing so, since a large number of heating chambers 10 are provided, the work efficiency can be further improved.

FIG. 8 is a vertical sectional view of still another embodiment of the present invention. This embodiment is similar to the previous embodiment, and corresponding parts bear the same reference numerals. The heating preparation means 9b, 9c are arranged at intervals in the circumferential direction of the furnace body 1, and each of these heating preparation means 9b, 9c has only one heating chamber 10. The lower receiving means 23 is configured to be displaced up and down by the elevating and lowering driving means 24. However, as still another embodiment, the upper and lower receiving means 25 are vertically moved and driven by the elevating and lowering driving means. May be fixed to the furnace body 1.

FIG. 9 is a sectional view of an example of a test jig or a handling device 40 for a test used in the high temperature strength tester of the present invention, and FIG. 10 is a plan view of the handling device 40. This handling device 40
Has a support member 41 made of refractory material, a rod 42 having one end fixed to the support member 41, and an elongated gripping member 43 fixed to the other end of the rod 42. The support member 41 is made of a refractory material such as porous alumina. The support member 41 has a flat shape and has a support hole 44 opened on the side opposite to the rod 42 (right side in FIGS. 9 and 10). The support hole 44 allows the base 27 of the test jig 14 to be received. The rod 42 extends outward along the flat surface of the support member 41 (see FIGS. 9 and 10).
It projects and extends to the left). The grip member 43 is a support member.
Vertical to the flat surface of 41 (vertical direction in Fig. 9,
It has a flat shape and extends in the direction perpendicular to the paper surface of FIG.
The grip member 43 is made of a material such as stainless steel. This gripping member 43 is attached to the index finger 45 and the middle finger of the operator.
In a state where the rod 42 is positioned between the gripping member 43 and the operator's hand 47, the vertically extending axis of the gripping member 43 is made vertical so that the support member 41 is flat. The surface can be kept horizontal. This can prevent erroneous operations such as the test jig 14 dropping from the support member 41. The test jig containing the test piece 13 in this way
14 can be handled in the first and second heating chambers 10a, 10b and the test chamber 3. The support member 41 and one end of the rod 42 are connected and fixed by a connecting member 48.

In the above-described embodiment, the heating chamber 10 is provided with two first and second heating chambers 10a and 10b outside the test chamber 3 in the radial direction.
May be provided three or more radially outward. In this case the second
The gate 11 also partitions between the heating chamber 10b and the third heating chamber 10c.

As described above, according to the present invention, a plurality of heating chambers are sequentially formed radially outward of the test chamber, and a plurality of sets are arranged vertically or circumferentially. Is a heating preparation chamber that communicates with the test chamber and is separated from other heating chambers by a gate that can be opened and closed, so the test pieces can be preheated, so the test pieces are heated to the test temperature sequentially. However, the high temperature strength test can be performed and the efficiency is improved. Further, since the heat capacity of this heating preparation means is relatively small, the rate of time change of the temperature change of each heating chamber is made as large as possible within the range where the damage due to the thermal shock of the test piece and the test jig does not occur,
This also improves the efficiency. Further, the structure is relatively simple, the cost is low, and the occurrence of failure can be prevented.

[Brief description of drawings]

1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken along section line II-II of FIG. 1, and FIG. 3 is a left side of the embodiment shown in FIG. 4 is a front view seen from FIG.
FIG. 3 is a partially cutaway perspective view of the embodiment shown in FIG. 3, FIG. 5 is a sectional view of a test jig 14 containing a test piece 13, and FIG. 6 is a longitudinal sectional view of another embodiment of the present invention. Fig. 7 shows the section line VI of Fig. 6.
FIG. 8 is a horizontal sectional view as seen from I-VII, FIG. 8 is a vertical sectional view of still another embodiment of the present invention, and FIG. 9 is a vertical sectional view of a test jig or test piece handling device 40 used in the present invention. FIG. 10 is a plan view of the handling device 40. 1 ... Furnace body, 3 ... Testing room, 4 ... Heater, 9, 9a, 9b,
9c ... Heating preparation means, 10 ... Heating chamber, 10a ... First heating chamber, 10b ... Second heating chamber, 11 ... Gate, 13 ... Test piece, 14 ... Test jig, 15 ... Lid, 40 ... Handling device, 41
…… Supporting member, 42 …… Bar, 43 …… Gripping member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-124847 (JP, A) Actual development S.A. 49-68487 (JP, U) Actual publication S.A. 62-12280 (JP, Y2)

Claims (2)

[Scope of utility model registration request] 1. A furnace main body having a test chamber, which has a heater built therein, and a plurality of heating chambers, which are sequentially formed radially outward of the test chamber and are arranged in a plurality of sets above and below and can communicate with the test chamber. A heating preparation means, a gate that opens and closes between heating chambers formed in the radial direction of the test chamber, a lower receiving means that receives the lower part of the test jig or the test piece in the test chamber, and a lower receiving means that moves up and down. A driving means and an upper receiving means which is provided at an upper position in the test chamber and receives an upper portion of the test jig or the test piece by preventing upward displacement of the test jig or the test piece. High temperature strength tester. 2. A furnace body containing a heater and having a test chamber, and a plurality of furnace bodies which are sequentially formed radially outward of the test chamber and arranged in a plurality of sets in the circumferential direction so as to communicate with the test chamber. A plurality of heating preparation means having chambers, a gate that opens and closes between the heating chambers formed in the radial direction of the test chamber, and a lower receiving means that supports and receives the lower part of the test jig or test piece in the test chamber. A high temperature which is provided at an upper position in the test chamber and includes an upper receiving means for receiving an upper portion of a test jig or a test piece, and a means for vertically moving at least one of the lower receiving means and the upper receiving means. Strength tester.