CN110977825A - Combined high-temperature compression clamp - Google Patents
Combined high-temperature compression clamp Download PDFInfo
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- CN110977825A CN110977825A CN201911340684.9A CN201911340684A CN110977825A CN 110977825 A CN110977825 A CN 110977825A CN 201911340684 A CN201911340684 A CN 201911340684A CN 110977825 A CN110977825 A CN 110977825A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
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Abstract
The invention relates to a combined high-temperature compression clamp, which comprises an upper compression clamp and a lower compression clamp which are symmetrically arranged; the upper compression clamp comprises an upper connecting rod, an upper compression rod and an upper compression head which are coaxially connected in sequence from top to bottom, and through holes for a first connecting screw connected with the upper connecting rod and the upper compression rod to penetrate through are formed in the upper connecting rod and the upper compression rod; the lower compression clamp comprises a lower connecting rod, a lower compression rod and a lower compression head which are coaxially connected in sequence from bottom to top, and through holes for a second connecting screw for connecting the lower connecting rod and the lower compression rod to penetrate through are formed in the lower connecting rod and the lower compression rod; the upper and lower pressure heads are used for clamping a sample to be tested; the upper and lower connecting rods, the first connecting screw and the second connecting screw are made of metal materials, and the upper and lower pressing rods, the upper and lower pressing heads are made of carbon or carbon ceramic materials. The invention realizes rigid connection between the compression bar and the connecting rod by utilizing a compact structure, is convenient to install in a radiation heating vacuum/inert atmosphere high-temperature furnace above 2500 ℃, and can be used for testing the compression strength of a short column sample with load above 100 kN.
Description
Technical Field
The invention belongs to the technical field of experimental mechanics high-temperature tests, and particularly relates to a combined high-temperature compression clamp.
Background
With the development of hypersonic aircrafts, the extreme environment in service state puts higher requirements on the high temperature resistance of materials, and the part of the hypersonic aircrafts needs to bear high temperature of more than 2500 ℃, so that novel high temperature resistant materials are urgently developed, and novel materials such as fiber reinforced ceramic matrix composite materials, ultrahigh temperature ceramics, refractory metals and the like are developed at present. The development, testing and application of these materials rely on accurate and complete high-temperature mechanical property data of the materials, wherein the high-temperature compression strength is one of the most basic and important service performance parameters of the high-temperature resistant materials. Therefore, in order to support the development and application of high-temperature/ultra-high material, the development of a material ultra-high temperature mechanical compression performance test characterization technology is urgently needed.
At present, the high-temperature compression strength test of over 2500 ℃ can only be carried out in a vacuum/inert atmosphere high-temperature furnace, and a typical sample is a square short column sample with the size of 10 multiplied by 25 mm. Conventional high temperature compression clamps are classified into actively cooled clamps and non-cooled clamps. Because metal materials with excellent high-temperature performance, such as tungsten alloy and molybdenum alloy, are difficult to process and weld out of a sealed cavity with a cooling liquid loop, the active cooling clamp can only be generally made of materials with mature processing and welding processes, such as austenitic stainless steel, and the softening temperature point of the stainless steel material is lower, so that the flow of the cooling liquid must be increased for the active cooling clamp to maintain the self cold state, and the ambient temperature is required to be not too high and generally not more than 1000 ℃. Therefore, the active cooling type metal clamp is only suitable for being installed in a vacuum/inert atmosphere high-temperature furnace for directly heating a sample, such as an electric heating furnace or an induction heating furnace, but the sample material is required to be conductive or magnetic conductive when the sample is electrified or inductively heated, so that the types of the tested materials are greatly limited.
The radiation type heating vacuum/inert atmosphere high-temperature furnace has no limitation on the conductivity and magnetic conductivity of the tested material, and is suitable for any material, so the radiation type heating vacuum/inert atmosphere high-temperature furnace is most widely applied. However, none of the high temperature compression jigs reported in the prior art can satisfy the compression strength test of short column samples with load of more than 100kN applied in a radiation heating vacuum/inert atmosphere high temperature furnace with temperature of more than 2500 ℃.
Therefore, in order to accelerate the basic research on the high-temperature compression performance of the high-temperature resistant material, it is necessary to design a novel high-temperature compression clamp to meet the above test requirements.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a combined high-temperature compression clamp. The high-temperature compression clamp realizes rigid connection between the carbon-carbon compression rod or the carbon-ceramic compression rod and the metal connecting rod by using a compact and reasonable structure, is convenient to install in a radiation heating vacuum/inert atmosphere high-temperature furnace with a narrow space and more than 2500 ℃, and can be used for testing the compression strength of a load and short column sample with more than 100 kN.
In order to achieve the above object, the present invention provides a combined high temperature compression clamp, comprising an upper compression clamp and a lower compression clamp which are symmetrically arranged; the upper compression clamp comprises an upper connecting rod, an upper compression rod and an upper pressure head which are coaxially connected in sequence from top to bottom, through holes for first connecting screws to penetrate through are formed in the upper connecting rod and the upper compression rod along the axial direction, and the upper connecting rod is connected with the upper compression rod through the first connecting screws; the lower compression clamp comprises a lower connecting rod, a lower compression rod and a lower compression head which are coaxially connected in sequence from bottom to top, through holes for a second connecting screw to pass through are formed in the lower connecting rod and the lower compression rod along the axial direction, and the lower connecting rod is connected with the lower compression rod through the second connecting screw; the upper pressure head and the lower pressure head are used for clamping a sample to be tested; the upper connecting rod, the lower connecting rod, the first connecting screw and the second connecting screw are made of metal materials, and the upper pressing rod, the lower pressing rod, the upper pressing head and the lower pressing head are made of carbon or carbon ceramic materials.
Preferably, the upper link, the lower link, the first connection screw, and the second connection screw are made of tungsten alloy or molybdenum alloy.
Preferably, an upper groove for accommodating the upper pressure head is formed in the center of the lower end of the upper pressure lever, two through holes communicated with the upper groove are symmetrically formed in two sides of the lower end of the upper pressure lever, the two through holes are used for a fixing screw to pass through, and the upper pressure head is fixed in the upper groove through the fixing screw; and/or the center position of the upper end of the lower pressure rod is provided with a lower groove, and the lower groove is used for accommodating the lower pressure head.
Preferably, the fixing screw is an outer hexagonal screw; and/or the fixing screw is made of carbon or carbon ceramic materials.
Preferably, a flat washer is sleeved on the first connecting screw and/or the second connecting screw, the flat washer is made of a metal material, and preferably, the flat washer is made of a tungsten alloy or a molybdenum alloy; and/or the first connecting screw and/or the second connecting screw are socket head cap connecting screws.
Preferably, the upper end of the upper connecting rod is connected with an upper cross beam of the mechanical testing machine, and the lower end of the lower connecting rod is connected with a base of the mechanical testing machine.
Preferably, an outer thread used for being in threaded connection with an upper cross beam of the mechanical testing machine is arranged on the outer peripheral wall of the upper end of the upper connecting rod; and an external thread used for being in threaded connection with a base of the mechanical testing machine is arranged on the peripheral wall of the lower end of the lower connecting rod.
Preferably, the through hole formed in the upper connecting rod is a first counter bore, the aperture of the lower section of the first counter bore is larger than that of the upper section of the first counter bore, and the upper end of the upper pressure lever penetrates through the lower section of the first counter bore; the through hole formed in the lower connecting rod is a second counter bore, the aperture of the upper section of the second counter bore is larger than that of the lower section of the second counter bore, and the lower end of the lower pressing rod penetrates through the upper section of the second counter bore.
Preferably, the through hole formed in the upper pressure lever is a first stepped through hole, and the first stepped through hole is communicated with the upper groove; the through hole formed in the lower pressing rod is a second stepped through hole, and the second stepped through hole is communicated with the lower groove.
Preferably, the first connecting screw is screwed in the first counter bore through the first stepped through hole; and the second connecting screw penetrates through the second stepped through hole and is in threaded connection with the second counter bore.
Compared with the prior art, the invention at least has the following beneficial effects:
(1) the combined high-temperature compression clamp adopts carbon or carbon ceramic clamps (such as a carbon or carbon ceramic compression bar, a compression head and the like) which do not need cooling in a high-temperature area at the center of the furnace, and adopts metal connecting rods (such as tungsten alloy or molybdenum alloy connecting rods) which do not need cooling at two ends far away from the center of the furnace, so that the stability and the uniformity of a temperature field in the radiation type heating vacuum/inert atmosphere high-temperature furnace are effectively ensured.
(2) The invention provides a carbon or carbon ceramic and metal rigid connection combined high-temperature compression clamp with a compact structure, which can be arranged in a radiation heating vacuum/inert atmosphere high-temperature furnace with a narrow space and a temperature of more than 2500 ℃, can be used for testing the compression strength of a load and short column sample with more than 100kN, and breaks through the difficulty of the compression strength test clamp applied to the load and short column sample with the temperature of more than 2500 ℃ in the radiation heating vacuum/inert atmosphere high-temperature furnace with the temperature of more than 100 kN; the high-temperature compression clamp has the advantages that the pressure head is easy to disassemble and assemble, the replacement of easily damaged parts is convenient, the structural design of the whole high-temperature compression clamp is compact, the operation is convenient, and the production cost is low.
Drawings
The drawings of the present invention are provided for illustrative purposes only, and the dimensions in the drawings do not necessarily correspond to those of an actual product.
Fig. 1 is a schematic structural view of a modular high-temperature compression jig according to an embodiment of the present invention.
Fig. 2 is a perspective view of the push-down lever included in fig. 1.
Fig. 3 is a perspective view of the lower link included in fig. 1.
In the figure: 1: an upper cross beam of the mechanical testing machine; 2: an upper connecting rod; 3: a first connection screw; 4: a flat washer; 5: an upper pressure lever; 6: an upper pressure head; 7: a set screw; 8: a sample to be tested; 9: a lower pressure head; 10: a lower pressure lever; 10-1: a lower groove; 10-2: a second stepped through hole; 11: a lower connecting rod; 11-1: a second counterbore; 12: a base of the mechanical testing machine; 13: a second attachment screw.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention provides a combined high-temperature compression clamp which can be applied to the compression strength test of short column samples with load of more than 100kN in a radiation heating vacuum/inert atmosphere high-temperature furnace with the temperature of more than 2500 ℃. FIG. 1 is a schematic diagram of a high temperature compression fixture in accordance with one embodiment of the present invention; FIG. 2 is a perspective view of the push down lever included in FIG. 1; FIG. 3 is a perspective view of the lower link included in FIG. 1; the dotted lines in fig. 2 and 3 are used to illustrate the internal structures of the lower pressure lever and the lower link, respectively.
In the present invention, for example, as shown in fig. 1, the present invention specifically provides a carbon-carbon or carbon-ceramic and metal rigid connection combined high-temperature compression clamp; in the invention, the high-temperature compression clamp comprises an upper compression clamp and a lower compression clamp which are arranged up and down symmetrically; the upper compression clamp comprises an upper connecting rod 2, an upper compression rod 5 and an upper compression head 6 which are coaxially connected in sequence from top to bottom, through holes for first connecting screws 3 to penetrate through are formed in the upper connecting rod 2 and the upper compression rod 5 along the axial direction (the direction of an arrow in fig. 1), and the upper connecting rod 2 is connected with the upper compression rod 5 through the first connecting screws 3; the lower compression clamp comprises a lower connecting rod 11, a lower pressing rod 10 and a lower pressing head 9 which are coaxially connected in sequence from bottom to top, through holes for second connecting screws 13 to pass through are formed in the lower connecting rod 11 and the lower pressing rod 10 along the axial direction (the direction of an arrow in fig. 1), and the lower connecting rod 11 is connected with the lower pressing rod 10 through the second connecting screws 13; the upper pressure head 6 and the lower pressure head 9 are used for clamping a sample 8 to be tested (such as a short-column-shaped compressed sample); the upper connecting rod 2, the lower connecting rod 11, the first connecting screw 3 and the second connecting screw 13 are made of metal materials, and the upper pressing rod 5, the lower pressing rod 10, the upper pressing head 6 and the lower pressing head 9 are made of carbon materials or carbon ceramic materials. In the invention, when the high-temperature compression clamp is used for testing, the sample 8 to be tested is arranged on the upper end surface of the lower pressure head 9, the lower end surface of the upper pressure head 6 contacts the upper end surface of the sample 8 to be tested, and a compression load is applied to the sample 8 to be tested. In the present invention, the upper link 2 and the lower link 11 may be collectively referred to as a link, the upper press rod 5 and the lower press rod 10 may be collectively referred to as a press rod, and the upper ram 6 and the lower ram 9 may be collectively referred to as a ram.
In the invention, the upper connecting rod 2, the upper pressure lever 5 and the upper pressure head 6 are sequentially and coaxially connected, which means that the upper connecting rod 2, the lower pressure lever 10 and the upper pressure head 6 which are coaxially arranged are sequentially connected; the lower connecting rod 11, the lower pressing rod 10 and the lower pressing head 9 are sequentially and coaxially connected, which means that the lower connecting rod 11, the lower pressing rod 10 and the lower pressing head 9 which are coaxially arranged are sequentially connected; in the present invention, for example, as shown in fig. 1, the through hole may penetrate through one end or both ends of the pressing rod and/or the connecting rod, for example; in the present invention, the through holes provided in the upper link 2 and the lower link 11 are through holes having internal threads on the inner peripheral walls thereof. In the present invention, for example, as shown in fig. 1, the lower end of the upper link 2 is engaged with the upper end of the upper press rod 5, the lower end of the upper press rod 5 is engaged with the upper press head 6, the first connection screw 3 is used for connecting the upper press rod 5 and the upper link 2, the first connection screw 3 extends into a through hole formed in the upper press rod 5 and is at least in threaded connection (screwed) with the lower end of the upper link 2 through a through hole formed in the upper link 2, and preferably, the upper end of the first connection screw 3 extending into the through hole formed in the upper link 2 is in threaded connection with the through hole; in the present invention, for example, as shown in fig. 1, the upper end of the lower link 11 is engaged with the lower end of the lower pressing rod 10, the lower pressing head 9 is disposed at the upper end of the lower pressing rod 10, the second connection screw 13 is used for connecting the lower pressing rod 10 and the lower link 11, the second connection screw 13 penetrates through a through hole formed in the lower pressing rod 10 and extends into a through hole formed in the lower link 11 to be at least in threaded connection (screwed) with the upper end of the lower link 11, and preferably, the second connection screw 13 extends into the lower end of the through hole formed in the lower link 11 and is in threaded connection with the through hole.
The combined high-temperature compression clamp has compact structure and reasonable structure arrangement, can be arranged in a radiation heating vacuum/inert atmosphere high-temperature furnace with narrow space and more than 2500 ℃, can be used for testing the compression strength of a load and short column sample with more than 100kN, has simple and convenient disassembly and assembly of a pressure head, is convenient for replacing a wearing part, and has compact structural design, convenient operation and lower production cost. According to the invention, a carbon or carbon ceramic clamp (such as a carbon or carbon ceramic compression bar and a pressure head) without cooling is required to be adopted in a high-temperature area at the center of the furnace, and a metal connecting rod (such as a tungsten alloy or molybdenum alloy connecting rod) without cooling is adopted at two ends far away from the center of the furnace, so that the stability and uniformity of a temperature field in the radiant heating vacuum/inert atmosphere high-temperature furnace are effectively ensured.
According to some preferred embodiments, the upper link 2, the lower link 11, the first connection screw 3 and the second connection screw 13 are made of tungsten alloy or molybdenum alloy.
According to some preferred embodiments, an upper groove for accommodating the upper pressure head 6 is formed in the center of the lower end of the upper pressure lever 5, two through holes communicated with the upper groove are symmetrically formed in two sides of the lower end of the upper pressure lever 5, the two through holes are used for allowing a fixing screw 7 to pass through, and the upper pressure head 6 is fixed in the upper groove through the fixing screw 7; the through hole penetrates through the side wall of the upper pressure rod 5, an internal thread is arranged on the inner peripheral wall of the through hole and is used for being in threaded connection with the fixing screw 7, and the upper pressure head 6 is locked with the upper pressure rod 5 through two symmetrical lateral fixing screws 7; in the present invention, the fixing screw 7 locks the upper pressing head 6 and the upper pressing rod 5 by friction force.
According to some preferred embodiments, a lower groove 10-1 is formed at a central position of an upper end of the lower pressing rod 10, and the lower groove 10-1 is used for accommodating the lower pressing head 9, for example, as shown in fig. 2.
According to some preferred embodiments, the fixing screw 7 is an external hexagonal screw (external hexagonal fixing screw); and/or the fixing screw 7 is made of carbon-carbon material or carbon ceramic material.
According to some preferred embodiments, the first connection screw 3 and/or the second connection screw 13 are/is sleeved with a flat washer 4, the flat washer 4 is made of a metal material, and preferably, the flat washer 4 is made of a tungsten alloy or a molybdenum alloy; in the present invention, for example, as shown in fig. 1, the first connection screw 3 and/or the second connection screw 13 includes a screw cap and a screw shaft, and the flat washer 4 is fitted over the screw shaft of the first connection screw 3 and/or the second connection screw 13. In the invention, the flat washer 4 is sleeved on the screw rod of the first connecting screw 3 and the second connecting screw 13, the first connecting screw 3 and the second connecting screw 13 respectively penetrate through the through holes of the upper pressure lever 5 and the lower pressure lever 10 and are respectively screwed with the upper connecting rod 2 and the lower connecting rod 11, and the upper connecting rod 2 and the lower connecting rod 11 are respectively rigidly connected and combined with the upper pressure lever 5 and the lower pressure lever 10 together with the flat washer 4.
According to some preferred embodiments, the first and/or second connection screws 3, 13 are socket head cap connection screws.
According to some preferred embodiments, the upper end of the upper link 2 is connected to the upper cross beam 1 of the mechanical testing machine, and the lower end of the lower link 11 is connected to the base 12 of the mechanical testing machine.
According to some preferred embodiments, the outer peripheral wall of the upper end of the upper connecting rod 2 is provided with an external thread for being in threaded connection with the upper cross beam 1 of the mechanical testing machine; and an external thread used for being in threaded connection with a base 12 of the mechanical testing machine is arranged on the peripheral wall of the lower end of the lower connecting rod 11.
According to some preferred embodiments, the outer diameter of the upper end of the upper connecting rod 2 is smaller than that of the lower end of the upper connecting rod 2, and the upper end of the upper connecting rod 2 is screwed in the upper cross beam 1 of the mechanical testing machine; the outer diameter of the lower end of the lower link 11 is smaller than the outer diameter of the upper end of the lower link 11, for example, as shown in fig. 3, the lower end of the lower link 11 is screwed into the base 12 of the mechanical testing machine. In the invention, the integral structures of the upper connecting rod and the lower connecting rod are the same, and the upper connecting rod is arranged in an inverted manner relative to the lower connecting rod.
According to some preferred embodiments, the through hole formed in the upper connecting rod 2 is a first counter bore, the aperture of the lower section of the first counter bore is larger than that of the upper section of the first counter bore, and the upper end of the upper pressure lever 5 penetrates through the lower section of the first counter bore; the through hole formed in the lower connecting rod 11 is a second counterbore 11-1, for example, as shown in fig. 3, the aperture of the upper section of the second counterbore 11-1 is larger than the aperture of the lower section of the second counterbore 11-1, and the lower end of the lower pressing rod 10 penetrates through the upper section of the second counterbore 11-1. In the present invention, for example, an internal thread may be provided at least on the inner circumferential wall of the upper section of the first counterbore, and for example, an internal thread may be provided at least on the inner circumferential wall of the lower section of the second counterbore.
According to some preferred embodiments, the outer diameter of the upper end of the upper pressure lever 5 is smaller than the outer diameter of the lower end of the upper pressure lever 5, and the upper end of the upper pressure lever 5 is arranged in the lower section of the first counter bore in a penetrating manner; the outer diameter of the lower end of the lower pressing rod 10 is smaller than that of the upper end of the lower pressing rod 10, for example, as shown in fig. 2, the lower end of the lower pressing rod 10 is arranged in the upper section of the second counter bore 11-1 in a penetrating manner. In the invention, the upper pressure lever and the lower pressure lever have the same integral structure, and the upper pressure lever is arranged in an inverted manner relative to the lower pressure lever.
According to some preferred embodiments, the through hole formed in the upper pressure lever 5 is a first stepped through hole, and the first stepped through hole is communicated with the upper groove; the through hole formed in the lower pressing rod 10 is a second stepped through hole 10-2, and the second stepped through hole 10-2 is communicated with the lower groove 10-1; in the present invention, the first stepped through hole refers to a stepped through hole having a large lower portion and a small upper portion, and the second stepped through hole refers to a stepped through hole having a large upper portion and a small lower portion.
According to some preferred embodiments, the first connection screw 3 is screwed in the first counter bore through the first stepped through hole; the second connecting screw 13 is threaded in the second counter bore 11-1 through the second stepped through hole 10-2. In the present invention, the first stepped through hole, the second stepped through hole, the first counterbore and the second counterbore may each be, for example, a circular hole. In the present invention, the first counter bore and the second counter bore may be collectively referred to as a counter bore, and the first stepped through hole and the second stepped through hole may be collectively referred to as a stepped through hole.
According to some specific embodiments, the high temperature compression jig comprises an upper compression jig and a lower compression jig, the upper compression jig comprises an upper connecting rod 2, an upper pressing rod 5, an upper pressing head 6, a first connecting screw 3, a flat washer 4 and a fixing screw 7; the lower compression clamp comprises a lower connecting rod 11, a lower pressing rod 10, a lower pressing head 9, a second connecting screw 13 and a flat washer 4; the upper end of the upper connecting rod 2 is in threaded connection with an upper cross beam 1 of a mechanical testing machine, the lower end of the upper connecting rod 2 is connected with the upper end of an upper pressure rod 5, the lower end of the upper connecting rod 2 is in threaded connection with a first connecting screw 3, and the lower end of the upper pressure rod 5 is connected with an upper pressure head 6; the two fixing screws 7 are in threaded connection with two symmetrical lateral threaded through holes at the lower end of the upper pressure head 6, and the upper pressure head 6 and the upper pressure rod 5 are locked through friction force; the lower end of the lower connecting rod 11 is in threaded connection with a base 12 of a mechanical testing machine, the upper end of the lower connecting rod 11 is connected with the lower end of the lower pressing rod 10, the upper end of the lower connecting rod 11 is in threaded connection with a second connecting screw 13, and the lower pressing head 9 is arranged at the upper end of the lower pressing rod 10; wherein the upper connecting rod 2, the lower connecting rod 11, the first connecting screw 3, the second connecting screw 13 and the flat washer 4 are made of tungsten alloy or molybdenum alloy; the upper pressure rod 5, the upper pressure head 6, the lower pressure rod 10, the lower pressure head 9 and the fixing screw 7 are made of carbon materials or carbon ceramic materials.
In some specific embodiments, when the high-temperature compression clamp is installed, firstly, a flat gasket is respectively sleeved on screw rods of a first connecting screw and a second connecting screw, the first connecting screw and the second connecting screw respectively penetrate through stepped through holes of the upper compression bar and the lower compression bar and are respectively in threaded connection with the upper connecting rod and the lower connecting rod, and then the upper connecting rod and the lower connecting rod can be respectively and rigidly connected and combined with the upper compression bar and the lower compression bar; then the external threads of the upper connecting rod and the lower connecting rod are respectively in threaded connection with an upper cross beam of a mechanical testing machine and a base of the mechanical testing machine; and then the upper pressure head and the lower pressure head are respectively arranged in the grooves of the upper pressure rod and the lower pressure rod close to the central position, wherein the upper pressure head is locked by two symmetrical outer hexagonal fixing screws, finally, the short cylindrical compression sample is arranged on the upper end surface of the lower pressure head, and the lower end surface of the upper pressure head contacts with the upper end surface of the short cylindrical compression sample, so that the compression load is applied.
It is specifically noted that the terms "upper," "lower," and the like, indicate orientations or positional relationships that are based on the orientations or positional relationships shown in fig. 1 for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention; the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. The utility model provides a modular high temperature compression anchor clamps which characterized in that:
comprises an upper compression clamp and a lower compression clamp which are symmetrically arranged;
the upper compression clamp comprises an upper connecting rod, an upper compression rod and an upper pressure head which are coaxially connected in sequence from top to bottom, through holes for first connecting screws to penetrate through are formed in the upper connecting rod and the upper compression rod along the axial direction, and the upper connecting rod is connected with the upper compression rod through the first connecting screws;
the lower compression clamp comprises a lower connecting rod, a lower compression rod and a lower compression head which are coaxially connected in sequence from bottom to top, through holes for a second connecting screw to pass through are formed in the lower connecting rod and the lower compression rod along the axial direction, and the lower connecting rod is connected with the lower compression rod through the second connecting screw;
the upper pressure head and the lower pressure head are used for clamping a sample to be tested;
the upper connecting rod, the lower connecting rod, the first connecting screw and the second connecting screw are made of metal materials, and the upper pressing rod, the lower pressing rod, the upper pressing head and the lower pressing head are made of carbon or carbon ceramic materials.
2. The modular high temperature compression clamp of claim 1, further comprising:
the upper connecting rod, the lower connecting rod, the first connecting screw and the second connecting screw are made of tungsten alloy or molybdenum alloy.
3. The modular high temperature compression clamp of claim 1 or 2, further comprising:
an upper groove for accommodating the upper pressure head is formed in the center of the lower end of the upper pressure rod, two through holes communicated with the upper groove are symmetrically formed in two sides of the lower end of the upper pressure rod, fixing screws can penetrate through the two through holes, and the upper pressure head is fixed in the upper groove through the fixing screws; and/or
The center position of the upper end of the lower pressure rod is provided with a lower groove, and the lower groove is used for containing the lower pressure head.
4. The modular high temperature compression clamp of claim 3, further comprising:
the fixing screw is an outer hexagon screw; and/or
The fixing screw is made of carbon or carbon ceramic materials.
5. The modular high temperature compression clamp of claim 1 or 2, further comprising:
a flat washer is sleeved on the first connecting screw and/or the second connecting screw, the flat washer is made of a metal material, and preferably, the flat washer is made of tungsten alloy or molybdenum alloy; and/or
The first connecting screw and/or the second connecting screw are/is a socket head cap connecting screw.
6. The modular high temperature compression clamp of claim 1 or 2, further comprising:
the upper end of the upper connecting rod is connected with an upper cross beam of the mechanical testing machine, and the lower end of the lower connecting rod is connected with a base of the mechanical testing machine.
7. The modular high temperature compression clamp of claim 6, further comprising:
the outer peripheral wall of the upper end of the upper connecting rod is provided with an external thread which is used for being in threaded connection with an upper cross beam of a mechanical testing machine;
and an external thread used for being in threaded connection with a base of the mechanical testing machine is arranged on the peripheral wall of the lower end of the lower connecting rod.
8. The modular high temperature compression clamp of claim 1, further comprising:
the through hole formed in the upper connecting rod is a first counter bore, the aperture of the lower section of the first counter bore is larger than that of the upper section of the first counter bore, and the upper end of the upper pressure lever penetrates through the lower section of the first counter bore;
the through hole formed in the lower connecting rod is a second counter bore, the aperture of the upper section of the second counter bore is larger than that of the lower section of the second counter bore, and the lower end of the lower pressing rod penetrates through the upper section of the second counter bore.
9. The modular high temperature compression clamp of claim 3 or 8, further comprising:
the through hole formed in the upper pressure lever is a first stepped through hole which is communicated with the upper groove;
the through hole formed in the lower pressing rod is a second stepped through hole, and the second stepped through hole is communicated with the lower groove.
10. The modular high temperature compression clamp of claim 8 or 9, further comprising:
the first connecting screw penetrates through the first stepped through hole and is in threaded connection with the first counter bore;
and the second connecting screw penetrates through the second stepped through hole and is in threaded connection with the second counter bore.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811584457 | 2018-12-24 | ||
| CN2018115844576 | 2018-12-24 |
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| CN110977825A true CN110977825A (en) | 2020-04-10 |
| CN110977825B CN110977825B (en) | 2022-02-08 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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