A planar compression creep assembly based on a creep machine providing linear tension

Abstract

A plane compression creep assembly based on a creep machine providing linear tension, comprising a tensile conduction compression mold, an upper plane compression mold and a lower plane compression mold; the tensile conduction compression mold comprises a first pressing block and a second pressing block, and when the spacing between the first pressing block and the second pressing block becomes smaller, it is used to provide a creep compression loading operation for the sample; the second pressing block is provided with a first threaded hole, the axis of the first threaded hole is the same as the tensile direction of the creep machine, and the first pressing block is provided with a first through hole coaxial with the first threaded hole; the upper plane compression mold comprises an upper cylindrical rod, an external threaded end, and an upper circular plate, and the external threaded end is matched and arranged on the first threaded hole; the lower plane compression mold comprises a lower cylindrical rod, a cylindrical base, a column pin, and a lower circular plate, and the column pin is matched and arranged on the first through hole. The present invention can accurately measure the plane compression creep characteristics of three-dimensional materials such as porous materials.

Description

Technical Field

[0001] The invention belongs to the technical field of creep testing machines, and in particular relates to a plane compression creep assembly based on a creep machine providing linear tension. Background Art

[0002] Before actual creep aging forming of materials such as aluminum alloys, finite element software is generally used to simulate creep aging forming, and the most appropriate actual forming scheme is determined through software simulation. Before simulating creep aging forming of materials, the creep properties of the materials must be tested. A creep testing machine that provides linear tensile force is commonly used. The material to be tested is processed into a specimen, and the specimen is clamped between the upper and lower tensile rods of the creep testing machine. The specimen is subjected to a creep tensile test at a set creep aging temperature to obtain the tensile creep amount of the specimen, and then the creep curve of the material is obtained to provide it to the creep aging forming simulation model, and finally used to guide the actual creep aging forming.

[0003] When using an existing creep tester that provides linear tension to conduct creep compression tests on samples, rod-shaped samples are generally used for testing. When the creep tester can only provide linear tension and the compression creep of the sample needs to be obtained, a tensile conduction compression mold is used to conduct creep compression tests on the sample. For example, patent document CN201910913177.3 discloses a creep compression fixture that belongs to a tensile conduction compression mold. The tensile conduction compression mold converts the linear tension of the creep machine into linear pressure through a cylindrical slide rail, thereby realizing the conversion from tensile creep to compression creep. However, due to the diversity of materials, some three-dimensional components such as porous materials have special structural shapes and are prone to buckling under pressure. For example, honeycomb materials are mainly hexagonal lattice-shaped porous materials made of sheet aramid paper less than 0.1 mm impregnated with phenolic resin. This type of material cannot be formulated into a rod-shaped or plate-shaped sample, and its mechanical properties mainly represent the overall mechanical properties of the three-dimensional component, so only the overall compression creep performance of the three-dimensional component can be considered. However, existing creep testing machines that provide linear tension can only measure the compression creep characteristics of rod-shaped specimens by stretching the conductive compression die, and do not have the function of measuring the plane compression creep characteristics of three-dimensional components. However, there is currently no creep testing machine that can measure three-dimensional components.

[0004] Therefore, it is necessary to design a device or method that can measure the planar compression creep characteristics of a three-dimensional component. Summary of the invention

[0005] The purpose of the present invention is to provide a planar compression creep assembly based on a creep machine that provides linear tension, so as to solve the problem raised in the background technology that the current creep testing machine that provides linear tension can only measure the compression creep characteristics of rod-shaped specimens by stretching the conduction compression mold, and does not have the function of measuring the planar compression creep characteristics of three-dimensional components.

[0006] To achieve the above-mentioned object, the present invention provides a planar compression creep assembly based on a creep machine providing linear tension, comprising a tensile conduction compression die, an upper planar compression die and a lower planar compression die;

[0007] The tensile conduction compression mold includes a first pressing block and a second pressing block. A spacing for installing a sample is maintained between the first pressing block and the second pressing block along the tensile direction of the creep machine, and the spacing value can be adjusted. When the spacing becomes smaller, it is used to provide a creep compression loading operation for the sample, and when the spacing becomes larger, it is used to unload the sample;

[0008] The second pressing block is provided with a first threaded hole, the axis of the first threaded hole is the same as the stretching direction of the creep machine, and the first pressing block is provided with a first through hole coaxial with the first threaded hole;

[0009] The upper plane compression mold comprises an upper cylindrical rod, an externally threaded end and an upper circular plate, one end of the upper cylindrical rod is fixedly connected to the externally threaded end, one side surface of the upper circular plate is fixedly connected to the other end of the upper cylindrical rod, the externally threaded end and the upper circular plate are coaxially arranged with the upper cylindrical rod; the externally threaded end is matched and arranged on the first threaded hole;

[0010] The lower plane compression mold includes a lower cylindrical rod, a cylindrical base, a column pin and a lower circular plate. The cylindrical base is plate-shaped, one end of the column pin is fixedly connected to one side surface of the cylindrical base, the other side surface of the cylindrical base is fixedly connected to one end of the lower cylindrical rod, the lower circular plate is fixedly set at the other end of the lower cylindrical rod, the column pin and the lower circular plate are coaxially set with the lower cylindrical rod, the surface of the cylindrical base close to the column pin is perpendicular to the axis of the lower cylindrical rod, the surface of the lower circular plate away from the column pin is parallel to the surface of the cylindrical base close to the column pin; the column pin is matched and set on the first through hole.

[0011] In a specific embodiment, the cross section of the second pressing block is rectangular, the first threaded hole is located at the midpoint of the diagonal of the rectangle, and the outer contours of the first pressing block and the second pressing block have the same size.

[0012] In a specific embodiment, the stretch-conducting-compressing mold further includes a first connector, a first connecting plate, a first conducting rod, a second connector, a second connecting plate, and a second conducting rod;

[0013] The first connecting head and the first connecting plate are located above the second pressing block, and the second connecting head and the second connecting plate are located below the first pressing block; the first transmission rod and the second transmission rod are arranged in parallel, and the first transmission rod is arranged in parallel with the axis of the first threaded hole;

[0014] The upper end of the first connector is used to connect to the upper stretching rod of the creep machine, and the lower end of the first connector is fixedly connected to the first connecting plate; the upper end of the second connector is fixedly connected to the second connecting plate;

[0015] The first conduction rod is inserted into a guide hole provided on the second pressure block, the upper end of the first conduction rod is fixedly connected to the first connecting plate, and the lower end of the first conduction rod is fixedly connected to the first pressure block; the second conduction rod is inserted into a guide hole provided on the first pressure block, the upper end of the second conduction rod is fixedly connected to the second pressure block, and the lower end of the second conduction rod is fixedly connected to the second connecting plate.

[0016] In a specific embodiment, the first conduction rods and the second conduction rods are two parallel arranged rods, the two first conduction rods and the two second conduction rods are distributed in a rectangular array, the two first conduction rods are located at a pair of diagonal positions, and the two second conduction rods are located at another pair of diagonal positions.

[0017] In a specific embodiment, the upper plane compression mold further includes an upper mold convex ring, which is fixedly sleeved in the middle of the upper cylindrical rod; the lower plane compression mold further includes a lower mold convex ring, which is fixedly sleeved in the middle of the lower cylindrical rod;

[0018] The planar compression creep assembly based on the creep machine providing linear tension also includes two symmetrically distributed upper extension rods, two symmetrically distributed lower extension rods, two symmetrically distributed extensometers and a support rod;

[0019] The upper end of the support rod is provided with an axial internal thread groove for threaded connection with the lower end of the second connector, and the lower end of the support rod is provided with a support rod lower end connection structure for connecting the lower stretching rod of the creep machine;

[0020] The extensometer is provided with a cylindrical boss and a conical contact end that can shrink in the vertical direction, and the shrinkage value of the conical contact end can be recorded in real time on a computer;

[0021] The upper extension rod comprises an upper convex ring fixing clamp arranged at the upper end, an upper extension rod base arranged at the lower end and a first connecting long rod, the first connecting long rod is used to connect the upper convex ring fixing clamp and the upper extension rod base; the upper convex ring fixing clamp is provided with a first semi-annular groove matching the upper mold convex ring, and the two upper extension rods are connected to the upper mold convex ring through the first semi-annular groove; a second threaded hole is provided at one end of the upper extension rod base, and an extensometer contact bolt is matched and provided in the second threaded hole, and the extensometer contact bolt is provided just above the conical contact end;

[0022] The lower extension rod comprises a lower convex ring fixing fixture arranged at the upper end, a lower extension rod base arranged at the lower end and a second connecting long rod, the second connecting long rod being used to connect the lower convex ring fixing fixture and the lower extension rod base; the lower convex ring fixing fixture is provided with a second semi-annular groove matching the lower mold convex ring, and the two lower extension rods are connected to the lower mold convex ring through the second semi-annular groove; a second through hole is provided at one end of the lower extension rod base, a matching sleeve is provided in the second through hole on the cylindrical boss of the extensometer, and a threaded fastening hole capable of clamping the cylindrical boss by a bolt is also provided on the side of the second through hole.

[0023] In a specific embodiment, slide rails are symmetrically arranged on both sides of the support rod;

[0024] One end of the upper extension rod base and one end of the lower extension rod base are both provided with rolling bearings matching the slide rails.

[0025] The planar compression creep assembly based on the creep machine providing linear tension also includes four clamping tension springs. Tension spring mounting rods are arranged on both sides of the upper extension rod base and both sides of the lower extension rod base. Two clamping tension springs are respectively arranged on the tension spring mounting rods on the same side of two different upper extension rods, and the other two clamping tension springs are respectively arranged on the tension spring mounting rods on the same side of two different lower extension rods.

[0026] In a specific embodiment, the first semi-annular grooves of the two upper extension rods are connected to the upper mold convex ring through a clamp; and the second semi-annular grooves of the two lower extension rods are connected to the lower mold convex ring through a clamp.

[0027] In a specific implementation, before performing the creep compression test, the upper plane compression mold is first adjusted to contact the upper surface of the sample, and then the extensometer contact bolt is adjusted so that the lower end of the extensometer contact bolt is connected to the conical contact end of the extensometer.

[0028] In a specific embodiment, the connecting structure at the lower end of the support rod is a radial through hole.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention can accurately measure the plane compression creep properties of three-dimensional materials such as porous materials. For some complex three-dimensional components, such as components with holes or irregular shapes, traditional sample preparation and measurement methods may not be applicable, and the overall performance test of three-dimensional components can provide a solution.

[0031] The upper plane compression mold of the present invention is connected to the first pressure block through a threaded connection of the external threaded end and the upper mold convex ring is connected to the upper convex ring fixing clamp by a clamp, and the lower plane compression mold is connected to the second pressure block through a pin and the lower mold convex ring is connected to the lower convex ring fixing clamp by a clamp, thereby enhancing the stability of the upper plane compression mold and the lower plane compression mold, thereby being able to obtain more accurate planar compression creep characteristic data of three-dimensional materials.

[0032] The three-dimensional component creep testing technology of the present invention allows the use of smaller-sized samples for accurate performance evaluation, which has significant advantages in terms of material saving and cost-effectiveness. Traditional rod-shaped materials or plate-shaped materials are processed by turning, milling, planing, grinding and other processes on raw materials, which consumes a lot of resources and costs. The present invention directly tests the overall mechanical properties of the sample, which can improve the efficiency of sample testing, reduce costs and other important functions.

[0033] Compression creep performance testing of three-dimensional components helps develop new materials and processing technologies to meet specific engineering needs. At the same time, compression creep testing of three-dimensional components can provide more information about the influence of material microstructure on macroscopic mechanical properties, which helps to deeply understand the failure mechanism of materials.

[0034] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0036] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0037] Figure 2 is a schematic diagram of a main viewing direction of an embodiment of the present invention;

[0038] Figure 3 is a schematic diagram of a left-view direction of an embodiment of the present invention;

[0039] Figure 4 is a schematic diagram of a top view of an embodiment of the present invention;

[0040] Figure 5 It is a structural schematic diagram of a stretching conduction compression mold according to an embodiment of the present invention;

[0041] Figure 6 1 is a schematic structural diagram of the upper half of a stretching conduction compression mold according to an embodiment of the present invention;

[0042] Figure 7 is a schematic structural diagram of an upper plane compression mold according to an embodiment of the present invention;

[0043] Figure 8 is a schematic diagram of a side view of an upper plane compression mold of an embodiment of the present invention;

[0044] Fig. 9 is a schematic structural diagram of a lower plane compression mold according to an embodiment of the present invention;

[0045] Fig.10 is a schematic diagram of a side view of a lower plane compression mold of an embodiment of the present invention;

[0046] Fig.11 is a schematic diagram of a support rod in a left-side view according to an embodiment of the present invention;

[0047] Fig.12 is a schematic diagram of a main viewing direction of a support rod of an embodiment of the present invention;

[0048] Fig.13 is a schematic structural diagram of a support rod according to an embodiment of the present invention;

[0049] Fig.14 is a schematic structural diagram of an extensometer according to an embodiment of the present invention;

[0050] Fig.15 It is a structural schematic diagram of an upper extension rod according to an embodiment of the present invention;

[0051] Fig.16 is a schematic diagram of an upper extension rod in a top view of an embodiment of the present invention;

[0052] Fig.17 It is a structural schematic diagram of a lower extension rod according to an embodiment of the present invention;

[0053] Fig.18 is a schematic diagram of a lower extension rod in a top view according to an embodiment of the present invention;

[0054] Among them, 1. stretching conduction compression mold; 2. upper plane compression mold; 3. lower plane compression mold; 4. lower extension rod; 5. upper extension rod; 6. extensometer; 7. support rod; 8. clamping tension spring; 11. first pressure block; 12. first connector; 13. first connecting plate; 14. first conduction rod; 15. second pressure block; 16. second connector; 17. second connecting plate; 18. second conduction rod; 21. upper cylindrical rod; 22. external thread end; 23. upper circular plate; 24. upper mold convex ring; 31. lower cylindrical rod; 32. cylindrical base; 33. cylindrical Pin; 34, lower circular plate; 35, lower mold convex ring; 41, lower convex ring fixing clamp; 42, lower extension rod base; 43, second connecting long rod; 51, upper convex ring fixing clamp; 52, upper extension rod base; 53, first connecting long rod; 54, extensometer contact bolt; 61, cylindrical boss; 62, conical contact end; 71, internal thread groove; 72, support rod lower end connection structure; 73, slide rail; 91, rolling bearing; 92, tension spring mounting rod; 111, first through hole; 151, first threaded hole; 421, second through hole; 521, second threaded hole. DETAILED DESCRIPTION

[0055] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0056] Example 1

[0057] The present invention provides a planar compression creep assembly based on a creep machine providing linear tension, comprising a tensile conduction compression die 1, an upper planar compression die 2 and a lower planar compression die 3;

[0058] The tensile conduction compression mold 1 includes a first pressing block 11 and a second pressing block 15. A spacing for installing a sample is maintained between the first pressing block 11 and the second pressing block 15 along the tensile direction of the creep machine, and the spacing value can be adjusted. When the spacing becomes smaller, it is used to provide a creep compression loading operation for the sample, and when the spacing becomes larger, it is used to unload the sample;

[0059] The second pressing block 15 is provided with a first threaded hole 151, the axis of which is the same as the tensile direction of the creep machine, and the first pressing block 11 is provided with a first through hole 111 coaxial with the first threaded hole;

[0060] The upper plane compression mold 2 includes an upper cylindrical rod 21, an externally threaded end 22 and an upper circular plate 23. One end of the upper cylindrical rod 21 is fixedly connected to the externally threaded end 22. One side surface of the upper circular plate 23 is fixedly connected to the other end of the upper cylindrical rod 21. The externally threaded end 22 and the upper circular plate 23 are coaxially arranged with the upper cylindrical rod 21. The externally threaded end 22 is matched and arranged on the first threaded hole 151.

[0061] The lower plane compression mold 3 includes a lower cylindrical rod 31, a cylindrical base 32, a pin 33 and a lower circular plate 34. The cylindrical base 32 is plate-shaped, one end of the pin 33 is fixedly connected to one side of the cylindrical base 32, the other side of the cylindrical base 32 is fixedly connected to one end of the lower cylindrical rod 31, and the lower circular plate 34 is fixedly set at the other end of the lower cylindrical rod 31. The pin 33 and the lower circular plate 34 are coaxially set with the lower cylindrical rod 31. The surface of the cylindrical base 32 close to the pin is perpendicular to the axis of the lower cylindrical rod 31, and the surface of the lower circular plate 34 away from the pin is parallel to the surface of the cylindrical base close to the pin; the pin 33 is matched and set on the first through hole 111.

[0062] If the tensile force applied in the test is F, the diameter d of the upper cylindrical rod and the lower cylindrical rod shall satisfy:

[0063] The material yield strength σ of the upper plane compression mold 2 and the lower plane compression mold 3 0.2 satisfy:

[0064] The thermal expansion coefficient ɑ of the material of the upper plane compression mold 2 and the lower plane compression mold 3 satisfies: ɑ≤17×10 -6 / ℃.

[0065] The center of the test material and the centers of the upper plane compression mold 2 and the lower plane compression mold 3 should be on the same straight line to avoid generating torque.

[0066] The parallelism between the lower surface of the upper circular plate 23 and the upper surface of the lower circular plate 34 is between 0.01 mm and 0.1 mm.

[0067] The flatness of the lower surface of the upper circular plate 23 and the upper surface of the lower circular plate 34 are both between 0.01 mm and 0.1 mm.

[0068] The thickness of the upper circular plate 23 and the lower circular plate 34 are both greater than 15 mm.

[0069] The cross section of the second pressing block 15 is rectangular, the first threaded hole 151 is located at the midpoint of the diagonal of the rectangle, and the outer contours of the first pressing block 11 and the second pressing block 15 are the same in size.

[0070] The stretching conduction compression mold further includes a first connecting head 12, a first connecting plate 13, a first conduction rod 14, a second connecting head 16, a second connecting plate 17 and a second conduction rod 18;

[0071] The first connecting head 12 and the first connecting plate 13 are located above the second pressing block 15, and the second connecting head 16 and the second connecting plate 17 are located below the first pressing block 11; the first conducting rod 14 and the second conducting rod 18 are arranged in parallel, and the first conducting rod 14 is arranged in parallel with the axis of the first threaded hole 151;

[0072] The upper end of the first connecting head 12 is used to connect the upper stretching rod of the creep machine, and the lower end of the first connecting head 12 is fixedly connected to the first connecting plate 13; the upper end of the second connecting head 16 is fixedly connected to the second connecting plate 17;

[0073] The first conduction rod 14 is inserted into a guide hole provided on the second pressure block 15, the upper end of the first conduction rod 14 is fixedly connected to the first connecting plate 13, and the lower end of the first conduction rod 14 is fixedly connected to the first pressure block 11. The second conduction rod 18 is inserted into a guide hole provided on the first pressure block 11, the upper end of the second conduction rod 18 is fixedly connected to the second pressure block 15, and the lower end of the second conduction rod 18 is fixedly connected to the second connecting plate 17.

[0074] The first conduction rods 14 and the second conduction rods 18 are two parallel arranged ones, and the two first conduction rods 14 and the two second conduction rods 18 are distributed in a rectangular array, the two first conduction rods 14 are located at a pair of diagonal positions, and the two second conduction rods 18 are located at another pair of diagonal positions.

[0075] The upper plane compression mold 2 further includes an upper mold convex ring 24, which is fixedly sleeved on the middle part of the upper cylindrical rod 21; the lower plane compression mold 3 further includes a lower mold convex ring 35, which is fixedly sleeved on the middle part of the lower cylindrical rod 31;

[0076] The plane compression creep assembly based on the creep machine providing linear tension also includes two symmetrically distributed upper extension rods 5, two symmetrically distributed lower extension rods 4, two symmetrically distributed extensometers 6 and a support rod 7;

[0077] The upper end of the support rod 7 is provided with an axial internal thread groove 71 for threaded connection with the lower end of the second connector, and the lower end of the support rod 7 is provided with a support rod lower end connection structure 72 for connecting the lower tensile rod of the creep machine;

[0078] The extensometer 6 is provided with a cylindrical boss 61 and a conical contact end 62 that can shrink in the vertical direction, and the shrinkage value of the conical contact end 62 can be recorded in real time on a computer;

[0079] The upper extension rod 5 comprises an upper convex ring fixing fixture 51 arranged at the upper end, an upper extension rod base 52 arranged at the lower end and a first connecting long rod 53, wherein the first connecting long rod 53 is used to connect the upper convex ring fixing fixture 51 and the upper extension rod base 52; the upper convex ring fixing fixture 51 is provided with a first semi-annular groove matching the upper mold convex ring 24, and the two upper extension rods 5 are connected to the upper mold convex ring 24 through the first semi-annular groove; a second threaded hole 521 is provided at one end of the upper extension rod base 52, and an extensometer contact bolt 54 is matched and arranged in the second threaded hole 521, and the extensometer contact bolt 54 is arranged just above the conical contact end 62;

[0080] The lower extension rod 4 includes a lower convex ring fixing fixture 41 arranged at the upper end, a lower extension rod base 42 arranged at the lower end, and a second connecting long rod 43, the second connecting long rod 43 is used to connect the lower convex ring fixing fixture 41 and the lower extension rod base 42; the lower convex ring fixing fixture 41 is provided with a second semi-annular groove matching the lower mold convex ring 35, and the two lower extension rods 4 are connected to the lower mold convex ring 35 through the second semi-annular groove; one end of the lower extension rod base 42 is provided with a second through hole 421, the second through hole 421 is matched with the cylindrical boss 61 of the extensometer, and the side of the second through hole 421 is also provided with a threaded fastening hole that can be clamped by a bolt on the cylindrical boss.

[0081] The two sides of the support rod 7 are symmetrically provided with slide rails 73; one end of the upper extension rod base and one end of the lower extension rod base are both provided with rolling bearings 91 matching the slide rails;

[0082] The plane compression creep assembly based on the creep machine providing linear tension also includes four clamping tension springs 8. Tension spring mounting rods 92 are arranged on both sides of the upper extension rod base and both sides of the lower extension rod base. Two clamping tension springs 8 are respectively arranged on the tension spring mounting rods 92 on the same side of two different upper extension rods, and the other two clamping tension springs 8 are respectively arranged on the tension spring mounting rods 92 on the same side of two different lower extension rods. The clamping tension springs 8 can make the rolling bearings 91 on both sides clamp the support rod to prevent the loss of precision caused by swinging.

[0083] The first semi-annular grooves of the two upper extension rods 5 are connected to the upper mold convex ring 24 through a clamp; the second semi-annular grooves of the two lower extension rods 4 are connected to the lower mold convex ring 35 through a clamp.

[0084] Before the creep compression test, the upper plane compression mold 2 is adjusted to contact the upper surface of the sample, and then the extensometer contact bolt 54 is adjusted so that the lower end of the extensometer contact bolt 54 is connected to the conical contact end 62 of the extensometer.

[0085] The support rod lower end connection structure 72 is a radial through hole.

[0086] The stretching conduction compression mold is used to convert the force pulling outwards at both ends into a force pressing in the middle. The stretching direction is the vertical direction.

[0087] The specific process of the creep compression experiment using the plane compression creep assembly based on the creep machine providing linear tension of the present invention is as follows:

[0088] First, connect the upper end of the first connector 12 to the upper stretching rod of the creep machine, connect the support rod lower end connecting structure 72 of the support rod 7 to the lower stretching rod of the creep machine, adjust the lower stretching rod of the creep machine to increase the distance between the upper plane compression mold 2 and the lower plane compression mold 3 (at least greater than the length of the sample), place the sample between the upper plane compression mold 2 and the lower plane compression mold 3, and adjust the position of the sample so that the center of the sample is on the same straight line as the center of the upper plane compression mold 2 and the lower plane compression mold 3, then adjust the upper plane compression mold 2 to contact with the upper surface of the sample, and then adjust the extensometer contact bolt 54 so that the lower end of the extensometer contact bolt 54 is connected to the conical contact end 62 of the extensometer. The sample is installed and the creep compression experiment can be carried out.

[0089] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions and substitutions can be made without departing from the concept of the present invention, which should be regarded as belonging to the protection scope of the present invention.

Claims

1. A planar compression creep assembly based on a creep machine providing linear tension, characterized in that: It comprises a stretching conduction compression mold (1), an upper plane compression mold (2) and a lower plane compression mold (3); The tensile conduction compression mold (1) comprises a first pressing block (11) and a second pressing block (15), wherein a spacing for installing a specimen is maintained between the first pressing block (11) and the second pressing block (15) along the tensile direction of the creep machine, and the spacing value can be adjusted; when the spacing is reduced, it is used to provide a creep compression loading operation for the specimen, and when the spacing is increased, it is used to remove the specimen; The second pressing block (15) is provided with a first threaded hole (151), the axis of the first threaded hole is the same as the stretching direction of the creep machine, and the first pressing block (11) is provided with a first through hole (111) coaxial with the first threaded hole; The upper plane compression mold (2) comprises an upper cylindrical rod (21), an externally threaded end head (22) and an upper circular plate (23); one end of the upper cylindrical rod (21) is fixedly connected to the externally threaded end head (22); a side plate surface of the upper circular plate (23) is fixedly connected to the other end of the upper cylindrical rod (21); the externally threaded end head (22) and the upper circular plate (23) are both coaxially arranged with the upper cylindrical rod (21); the externally threaded end head (22) is matched and arranged on the first threaded hole (151); The lower plane compression mold (3) comprises a lower cylindrical rod (31), a cylindrical base (32), a column pin (33) and a lower circular plate (34); the cylindrical base (32) is plate-shaped; one end of the column pin (33) is fixedly connected to a side surface of the cylindrical base (32); the other side surface of the cylindrical base (32) is fixedly connected to one end of the lower cylindrical rod (31); the lower circular plate (34) is fixedly arranged at the other end of the lower cylindrical rod (31); the column pin (33) and the lower circular plate (34) are both coaxially arranged with the lower cylindrical rod (31); the surface of the cylindrical base (32) close to the column pin is perpendicular to the axis of the lower cylindrical rod (31); the surface of the lower circular plate (34) away from the column pin is parallel to the surface of the cylindrical base close to the column pin; the column pin (33) is matched and arranged on the first through hole (111).

2. The planar compression creep assembly based on a creep machine providing linear tension according to claim 1, characterized in that: The cross section of the second pressing block (15) is rectangular, the first threaded hole (151) is located at the midpoint of the diagonal of the rectangle, and the outer contours of the first pressing block (11) and the second pressing block (15) have the same size.

3. The planar compression creep assembly based on a creep machine providing linear tension according to claim 1, characterized in that: The stretching conduction compression mold (1) further comprises a first connecting head (12), a first connecting plate (13), a first conduction rod (14), a second connecting head (16), a second connecting plate (17) and a second conduction rod (18); The first connecting head (12) and the first connecting plate (13) are located above the second pressing block (15), and the second connecting head (16) and the second connecting plate (17) are located below the first pressing block (11); the first conducting rod (14) and the second conducting rod (18) are arranged in parallel, and the first conducting rod (14) and the axis of the first threaded hole (151) are arranged in parallel; The upper end of the first connecting head (12) is used to connect to the upper stretching rod of the creep machine, and the lower end of the first connecting head (12) is fixedly connected to the first connecting plate (13); the upper end of the second connecting head (16) is fixedly connected to the second connecting plate (17); The first conduction rod (14) is inserted into a guide hole provided on the second pressing block (15); the upper end of the first conduction rod (14) is fixedly connected to the first connecting plate (13); the lower end of the first conduction rod (14) is fixedly connected to the first pressing block (11); the second conduction rod (18) is inserted into a guide hole provided on the first pressing block (11); the upper end of the second conduction rod (18) is fixedly connected to the second pressing block (15); and the lower end of the second conduction rod (18) is fixedly connected to the second connecting plate (17).

4. The planar compression creep assembly based on a creep machine providing linear tension according to claim 3, characterized in that: The first conduction rods (14) and the second conduction rods (18) are both two rods arranged in parallel, the two first conduction rods (14) and the two second conduction rods (18) are distributed in a rectangular array, the two first conduction rods (14) are located at a pair of diagonal positions, and the two second conduction rods (18) are located at another pair of diagonal positions.

5. The planar compression creep assembly based on a creep machine providing linear tension according to claim 3, characterized in that: The upper plane compression mold (2) further comprises an upper mold convex ring (24), which is fixedly sleeved on the middle part of the upper cylindrical rod (21); the lower plane compression mold (3) further comprises a lower mold convex ring (35), which is fixedly sleeved on the middle part of the lower cylindrical rod (31); The planar compression creep assembly based on the creep machine providing linear tension also includes two symmetrically distributed upper extension rods (5), two symmetrically distributed lower extension rods (4), two symmetrically distributed extensometers (6) and a support rod (7); The upper end of the support rod (7) is provided with an axial internal thread groove (71) for threaded connection with the lower end of the second connector, and the lower end of the support rod (7) is provided with a support rod lower end connection structure (72) for connecting to a lower stretching rod of a creep machine; The extensometer (6) is provided with a cylindrical boss (61) and a conical contact end (62) that can shrink in a vertical direction, and the shrinkage value of the conical contact end (62) can be recorded in real time on a computer; The upper extension rod (5) comprises an upper convex ring fixing clamp (51) arranged at the upper end, an upper extension rod base (52) arranged at the lower end and a first connecting long rod (53), wherein the first connecting long rod (53) is used to connect the upper convex ring fixing clamp (51) and the upper extension rod base (52); the upper convex ring fixing clamp (51) is provided with a first semi-annular groove matching the upper mold convex ring (24), and the two upper extension rods (5) are connected to the upper mold convex ring (24) through the first semi-annular groove; a second threaded hole (521) is provided at one end of the upper extension rod base (52), and an extensometer contact bolt (54) is matched and arranged in the second threaded hole (521), and the extensometer contact bolt (54) is arranged just above the conical contact end (62); The lower extension rod (4) comprises a lower convex ring fixing clamp (41) arranged at the upper end, a lower extension rod base (42) arranged at the lower end and a second connecting long rod (43), wherein the second connecting long rod (43) is used to connect the lower convex ring fixing clamp (41) and the lower extension rod base (42); the lower convex ring fixing clamp (41) is provided with a second semi-annular groove matching the lower mold convex ring (35), and the two lower extension rods (4) are connected to the lower mold convex ring (35) through the second semi-annular groove; one end of the lower extension rod base (42) is provided with a second through hole (421), the second through hole (421) is matched with the cylindrical boss (61) of the extensometer, and the side surface of the second through hole (421) is also provided with a threaded fastening hole capable of clamping the cylindrical boss by a bolt.

6. The planar compression creep assembly based on a creep machine providing linear tension according to claim 5, characterized in that: Slide rails (73) are symmetrically arranged on both sides of the support rod (7); One end of the upper extension rod base and one end of the lower extension rod base are both provided with rolling bearings (91) matching the slide rail; The planar compression creep assembly based on the creep machine providing linear tension also includes four clamping tension springs (8), tension spring mounting rods (92) are arranged on both sides of the upper extension rod base and both sides of the lower extension rod base, two clamping tension springs (8) are respectively arranged on the tension spring mounting rods (92) on the same side of two different upper extension rods, and the other two clamping tension springs (8) are respectively arranged on the tension spring mounting rods (92) on the same side of two different lower extension rods.

7. The planar compression creep assembly based on a creep machine providing linear tension according to claim 5, characterized in that: The first semi-annular grooves of the two upper extension rods (5) are connected to the upper mold convex ring (24) through a clamp; and the second semi-annular grooves of the two lower extension rods (4) are connected to the lower mold convex ring (35) through a clamp.

8. The planar compression creep assembly based on a creep machine providing linear tension according to claim 5, characterized in that: Before the creep compression test is performed, the upper plane compression mold (2) is first adjusted to contact the upper surface of the sample, and then the extensometer contact bolt (54) is adjusted so that the lower end of the extensometer contact bolt (54) is connected to the conical contact end (62) of the extensometer.

9. The planar compression creep assembly based on a creep machine providing linear tension according to claim 5, characterized in that: The support rod lower end connection structure (72) is a radial through hole.

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