CN219104542U

CN219104542U - Compression creep assembly and compression creep device with same

Info

Publication number: CN219104542U
Application number: CN202221903813.8U
Authority: CN
Inventors: 罗超; 李飞; 张骥; 张丕迪; 陈宁; 杨雷岗; 类成华
Original assignee: Ncs Testing Technology Co ltd
Current assignee: Ncs Testing Technology Co ltd
Priority date: 2022-07-23
Filing date: 2022-07-23
Publication date: 2023-05-30
Anticipated expiration: 2032-07-23

Abstract

The application relates to a compression creep assembly and a compression creep device with the same, and relates to the technical field of performance test of materials, the compression creep assembly comprises a first pull head and a second pull head, wherein a first compression groove and a second compression groove are respectively formed in one ends of the first pull head and the second pull head, a first connecting block and a second connecting block are respectively arranged in the first compression groove and the second compression groove, and at least one group of the first connecting block, the first compression groove and the second connecting block is detachably connected with the second compression groove; the first connecting block is close to one side of the bottom of the first compression groove, and the second connecting block is close to one side of the bottom of the second compression groove and is arranged as a matched compression surface. According to the technical scheme, acting force in the stretching direction received by the first pull head and the second pull head is converted into acting force in the compression direction of the sample between the first connecting block and the second connecting block pair, so that a compression test is carried out on a common tensile testing machine; and the structure is simple, the system error is small, the cost of the device is low, and the operation is easy.

Description

Compression creep assembly and compression creep device with same

Technical Field

The application relates to the field of performance testing of materials, in particular to a compression creep assembly and a compression creep device.

Background

At present, as a metal material durable creep test method is more and more perfect, the requirement on a durable creep clamp is also higher and higher. The synchronous extension measuring device for the domestic existing durable creep test is mainly suitable for uniaxial tension creep test.

Whether the mechanical type durable creep testing machine or the electronic type durable creep testing machine can only apply a force in the stretching direction to the sample, so that the sample pull head is modified, the force in the stretching direction is reversed by utilizing a counterforce structure, the sample is compressed, and the compressive durable creep test is performed.

However, in the prior art, the compression assembly cannot be well adapted to a common tensile testing machine, the structure is complex, the operation is difficult, and the system error is large due to excessive structures.

Disclosure of Invention

The purpose of this application is to provide a compression creep subassembly and a compression creep device, solves among the prior art compression subassembly structure complicacy, can not adapt to most ordinary testing machine, difficult operation and the great problem of system error.

In a first aspect, the present application provides a compression creep device, which adopts the following technical scheme:

the compression creep assembly comprises a first pull head and a second pull head, wherein a first compression groove and a second compression groove are respectively formed in one end, opposite to the first pull head and the second pull head, of each of the first pull head and the second pull head, a first connecting block and a second connecting block are respectively arranged in the first compression groove and the second compression groove, and at least one group of the first connecting blocks, the first compression groove and the second connecting blocks and the second compression grooves are detachably connected; the first connecting block is close to one side of the bottom of the first compression groove, and the second connecting block is close to one side of the bottom of the second compression groove and is arranged as a matched compression surface.

By adopting the technical scheme, the acting force in the stretching direction, which is received by the first pull head and the second pull head, is converted into the acting force in the compression direction of the sample between the first connecting block and the second connecting block pair, so that the compression test is carried out on a common tensile testing machine; and the structure is simple, the system error is small, the cost of the device is low, and the operation is easy.

Optionally, the first connection block and the second connection block are arranged in a regular quadrangular shape.

By adopting the technical scheme, the compression surface is wider and smoother, and is easy to place to a vertical position relative to the compression direction.

Optionally, the second connecting block is connected for dismantling with the second compressed groove setting, the cell wall of second compressed groove both sides is provided with second connecting block complex through-hole, one end of second connecting block is provided with the stopper.

By adopting the technical scheme, the compression assembly is convenient to disassemble and assemble.

Optionally, at least one side groove wall of the second compression groove is provided with an observation hole.

By adopting the technical scheme, the compressed sample can be conveniently observed.

In a second aspect, the present application provides a compression creep device that adopts the following technical scheme:

a compression creep device comprising a stretcher and the compression creep assembly; the stretching machine comprises an upper pull rod and a lower pull rod, and the upper pull rod and the lower pull rod are respectively connected with one ends of the first pull head and the second pull head which are opposite; the upper pull rod is detachably connected with the first pull head, the lower pull rod is detachably connected with the second pull head; the lower end of the lower pull rod is connected with a creep pull rod.

Through adopting above-mentioned technical scheme, make and install before carrying out compression test between the first pull head of last pull rod and compression subassembly and lower pull rod and the second pull head on the stretcher, demolish after compression test, the dismouting of compression subassembly on the stretcher of being convenient for improves application scope, reduces the operation degree of difficulty.

Optionally, the measuring assembly comprises an upper extension plate, a lower extension plate, an adjusting screw and a grating ruler, wherein the upper extension plate and the lower extension plate are respectively connected with the first pull head and the second pull head, and the adjusting screw and the grating ruler are respectively arranged on the upper extension plate and the lower extension plate.

Through adopting above-mentioned technical scheme, change the displacement between first pull head, the second pull head and change into the displacement between upper extension board, the lower extension board to measure the relative displacement of adjusting screw through the grating chi, carry out real-time accurate measurement to the compression volume of sample.

Optionally, go up and extend between board, the lower extension board and first pull head, the second pull head through keeping silent the seat and be connected with keeping silent the ring, the one end that first pull head, second pull head are opposite to each other is provided with the groove of keeping silent, keep silent the seat and splice by two semicircle rings and form, and the inner wall be provided with keep silent groove complex spacing arch, the outer wall is provided with the external screw thread, keep silent the ring and set up to annular, the inner wall be provided with external screw thread complex internal screw thread.

Through adopting above-mentioned technical scheme, through keeping silent the seat card of keeping silent into keeping silent the inslot to with keeping silent seat and first pull head, second pull head chucking through keeping silent the ring, improve the integration of keeping silent seat and first pull head, second pull head, reduce the systematic error and improve whole rigidity intensity.

Optionally, an upper extension seat is arranged on the upper extension plate, and the adjusting screw is arranged on the upper extension seat and is connected with the adjusting nut; the lower extension plate is provided with a lower extension seat, and the grating ruler is arranged on the lower extension seat.

By adopting the technical scheme, the positions of the adjusting screw and the grating ruler relative to the upper extension plate and the lower extension plate are convenient to adjust, so that the device is suitable for different tensile testing machines.

Optionally, a guide rail plate is arranged on the creep pull rod, and rollers rolling along the guide rail plate are arranged on the upper extension seat and the lower extension seat.

By adopting the technical scheme, the guide rail plate plays a role in supporting the upper extension plate and the lower extension plate in the horizontal direction through the rollers, so that the guide rail plate is prevented from shaking in the horizontal direction and the measurement accuracy is prevented from being influenced; meanwhile, the rolling of the roller on the guide rail plate does not affect the movement of the upper extension plate and the lower extension plate in the vertical direction.

Optionally, the measurement assembly is provided with two sets, and the symmetry sets up, upward stretch seat and lower stretching seat on the symmetry be provided with two spring posts, be connected with the elastic component that is in compression state between the spring post that is located the homonymy in two sets of measurement assembly.

By adopting the technical scheme, the running stability of the device is improved, so that the accuracy of displacement measurement is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the first compression groove and the second compression groove are formed in the first pull head and the second pull head on the opposite sides, the first connecting block and the second connecting block are arranged at the top of the grooves, and when the first pull head and the second pull head are subjected to acting force in the stretching direction and move backwards, the first connecting block and the second connecting block move in opposite directions, a sample between the first connecting block and the second connecting block is compressed, so that the acting force in the stretching direction of the tester is converted into the acting force in the compression direction, and the compression test is performed on a common tensile tester;

2. the compression assembly of this scheme simple structure, systematic error is little, the operation of being convenient for.

Drawings

FIG. 1 is a schematic perspective view of a compression assembly according to embodiment 1 of the present application;

FIG. 2 is a schematic cross-sectional view of a compression assembly according to embodiment 1 of the present application;

FIG. 3 is a schematic perspective view of a compression creep-loading paper according to example 3 of the present application;

FIG. 4 is a schematic front view of a compression creep paper according to example 3 of the present application;

in the figure, 11, a first pull head; 12. a second slider; 13. a first compression groove; 14. a second compression tank; 15. a first connection block; 16. a second connection block; 17. a limiting block; 18. an observation hole; 19. a jaw slot; 21. a pull rod; 22. a pull-down rod; 23. creep tie rod; 24. a guide rail plate; 31. an upper extension plate; 32. a lower extension plate; 33. adjusting a screw; 34. a grating ruler; 35. an upper extension seat; 36. a lower extension seat; 37. a roller; 38. a spring post; 39. an elastic member; 41. a jaw seat; 42. jaw ring.

Detailed Description

The present application is described in further detail below with reference to fig. 1-4.

Example 1

The compression creep assembly comprises a first pull head 11 and a second pull head 12, wherein a first compression groove 13 and a second compression groove 14 are respectively formed in opposite ends of the first pull head 11 and the second pull head 12, a first connecting block 15 and a second connecting block 16 are respectively arranged in the first compression groove 13 and the second compression groove 14, the first connecting block 15 and the first compression groove 13 are fixedly connected, the second connecting block 16 and the second compression groove 14 are detachably connected, and through holes matched with the second connecting block 16 are formed in groove walls on two sides of the second compression groove 14; the groove wall of one side of the second compression groove 14 is provided with an observation hole 18; one end of the second connecting block 16 is provided with a limiting block 17; the first connecting block 15 and the second connecting block 16 are arranged in a regular quadrangular shape, and the side of the first connecting block 15 close to the bottom of the first compression groove 13 and the side of the second connecting block 16 close to the bottom of the second compression groove 14 are arranged as matched compression surfaces.

The implementation principle of the embodiment of the application is as follows: before the test starts, the first pull head 11 is connected with an upper pull rod of the testing machine, the second pull head 12 is connected with a lower pull rod, a sample is placed on a first connecting block 15 in the first pull head 11, the lower pull rod of the testing machine is slowly lifted, the end part of the lower pull head extends into a first compression groove 13 of the first pull head 11, a second connecting block 16 is inserted from a through hole, a limiting block 17 rancour is positioned and is contacted with the outer wall of the second pull head 12, and the testing machine is started to compress the sample.

Example 2

A compression creep assembly differing from the compression creep assembly described in the embodiment in that the first connection block 15 is detachably connected to the first compression groove 13, and the second connection block 16 is detachably connected to the second compression groove 14; both side groove walls of the second compression groove 14 are provided with observation holes 18.

Example 3

A compression creep apparatus, refer to fig. 3 and 4; comprising a stretcher and a compression creep assembly as described in example 1 or example 2; the stretcher comprises an upper pull rod 21 and a lower pull rod 22, and the upper pull rod 21 and the lower pull rod 22 are respectively connected with one ends of the first pull head 11 and the second pull head 12 which are opposite; the upper pull rod 21 is in threaded connection or clamping connection with the first pull head 11, the lower pull rod 22 and the second pull head 12; the lower end of the lower pull rod 22 is connected with a creep pull rod 23.

The measuring assembly comprises an upper extension plate 31, a lower extension plate 32, an adjusting screw 33 and a grating ruler 34,

the upper extension plate 31, the lower extension plate 32, the first pull head 11 and the second pull head 12 are connected with a jaw ring 42 through a jaw seat 41, jaw grooves 19 are formed in the opposite ends of the first pull head 11 and the second pull head 12, the jaw seat 41 is formed by splicing two semicircular rings, limiting protrusions matched with the jaw grooves 19 are arranged on the inner wall of the jaw seat 41, external threads are arranged on the outer wall of the jaw seat, the jaw ring 42 is annular, and internal threads matched with the external threads are arranged on the inner wall of the jaw seat; the upper extension plate 31 is provided with an upper extension seat 35, and the adjusting screw 33 is arranged on the upper extension seat 35, is connected with an adjusting nut, and adjusts the position of the adjusting screw 33; the lower extension plate 32 is provided with a lower extension seat 36, and the grating ruler 34 is arranged on the lower extension seat 36;

to improve stability of the upper extension plate 31 and the lower extension plate 32 in lifting and lowering, thereby improving measurement accuracy. The inventor sets up the guide rail plate 24 on the creep tie rod 23, and sets up the gyro wheel 37 on upper extension seat 35 and lower extension seat 36, and gyro wheel 37 rolls along guide rail plate 24, carries out spacing to upper extension plate 31 and lower extension plate 32 in its horizontal direction when reciprocating.

The two sets of measuring components in this embodiment are symmetrically arranged, two spring columns 38 are symmetrically arranged on the upper extension seat 35 and the lower extension seat 36, and an elastic piece 39 in a compressed state is connected between the spring columns 38 located on the same side in the two sets of measuring components.

The implementation principle of the embodiment of the application is as follows: before the test starts, the compression assembly is firstly installed on a testing machine, a jaw seat 41 is fixedly connected with a first pull head 11 and a second pull head 12 through a jaw ring 42, one end of an upper extension plate 31 and one end of a lower extension plate 32 are fixedly connected with the jaw seat 41, the other end of the upper extension plate is respectively connected with an upper extension seat 35 and a lower extension seat 36, and the positions of an adjusting screw 33 and a grating ruler 34 on the upper extension seat 35 and the lower extension seat 36 are adjusted, so that a probe of the grating ruler 34 is contacted with the adjusting screw 33; after the adjustment is finished, the testing machine is started to compress the sample in the compression assembly, and as the probe of the grating ruler 34 is telescopic, when the sample is deformed under the action force, the deformation of the sample is transmitted to the upper extension seat 35 and the lower extension seat 36 through the upper extension plate 31 and the lower extension plate 32, and is transmitted to the grating ruler 34 through the adjusting screw 33, the probe of the grating ruler 34 is changed, and the deformation of the sample is obtained through data processing by a computer.

The embodiments of this embodiment are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, in which like parts are denoted by like reference numerals. Therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims

1. The compression creep assembly is characterized by comprising a first pull head (11) and a second pull head (12), wherein a first compression groove (13) and a second compression groove (14) are respectively formed in opposite ends of the first pull head (11) and the second pull head (12), a first connecting block (15) and a second connecting block (16) are respectively arranged in the first compression groove (13) and the second compression groove (14), and at least one group of the first connecting block (15) and the first compression groove (13) and at least one group of the second connecting block (16) and the second compression groove (14) are detachably connected; the first connecting block (15) is arranged to be a matched compression surface near the bottom of the first compression groove (13) and the second connecting block (16) is arranged to be a matched compression surface near the bottom of the second compression groove (14).

2. The compression creep assembly according to claim 1, wherein the first connection block (15) and the second connection block (16) are arranged in a regular quadrangular shape.

3. The compression creep assembly according to claim 1, wherein the second connection block (16) is detachably connected with the second compression groove (14), through holes matched with the second connection block (16) are formed in groove walls on two sides of the second compression groove (14), and a limiting block (17) is arranged at one end of the second connection block (16).

4. The compression creep assembly according to claim 1, wherein at least one of the side groove walls of the second compression groove (14) is provided with a viewing hole (18).

5. A compression creep apparatus comprising a stretcher and the compression creep assembly of any one of claims 1-4; the stretching machine comprises an upper pull rod (21) and a lower pull rod (22), wherein the upper pull rod (21) and the lower pull rod (22) are respectively connected with one ends of the first pull head (11) and the second pull head (12) which are opposite; the upper pull rod (21) is detachably connected with the first pull head (11), the lower pull rod (22) and the second pull head (12); the lower end of the lower pull rod (22) is connected with a creep pull rod (23).

6. The compression creep device according to claim 5, further comprising a measuring assembly, wherein the measuring assembly comprises an upper extension plate (31), a lower extension plate (32), an adjusting screw (33) and a grating ruler (34), the upper extension plate (31) and the lower extension plate (32) are respectively connected with the first pull head (11) and the second pull head (12), and the adjusting screw (33) and the grating ruler (34) are respectively arranged on the upper extension plate (31) and the lower extension plate (32).

7. The compression creep device according to claim 6, wherein the upper extension plate (31), the lower extension plate (32) and the first slider (11) and the second slider (12) are connected with a jaw ring (42) through a jaw seat (41), one end of the first slider (11) and one end of the second slider (12) opposite to each other are provided with a jaw groove (19), the jaw seat (41) is formed by splicing two semicircular rings, the inner wall is provided with a limit protrusion matched with the jaw groove (19), the outer wall is provided with an external thread, the jaw ring (42) is annular, and the inner wall is provided with an internal thread matched with the external thread.

8. The compression creep device according to claim 6, wherein the upper extension plate (31) is provided with an upper extension seat (35), and the adjustment screw (33) is provided on the upper extension seat (35) and connected with an adjustment nut; the lower extension plate (32) is provided with a lower extension seat (36), and the grating ruler (34) is arranged on the lower extension seat (36).

9. A compression creep device according to claim 8, characterized in that the creep tie (23) is provided with a rail plate (24), and the upper and lower extension seats (35, 36) are provided with rollers (37) rolling along the rail plate (24).

10. The device according to claim 9, wherein the measuring assemblies are provided with two sets and are symmetrically arranged, the upper extension seat (35) and the lower extension seat (36) are symmetrically provided with two spring columns (38), and elastic members (39) in compression are connected between the spring columns (38) positioned on the same side in the two sets of measuring assemblies.