CN220455063U - Flattening testing machine - Google Patents

Abstract

The utility model relates to a flattening testing machine, which comprises a hydraulic machine, an operating platform and further comprises: a limiting device and a fixing device; the limiting devices comprise elastic limiting parts, the paired limiting devices are symmetrically arranged in the deformation direction of the tubular sample, and when the limiting devices are in a limiting state, the elastic limiting parts are movably attached to the outer peripheral side of the tubular sample and have a tendency of moving in a direction away from the tubular sample; the fixing devices are symmetrically arranged at two axial ends of the tubular sample in pairs, each fixing device comprises a fixing and pressing part, and when the fixing and pressing parts are in a limiting state, the fixing and pressing parts are always and locally attached to the end surfaces of the tubular sample so as to limit the sliding or deflection of the tubular sample in the compression process; the distance between the elastic limiting part and the upper end face of the operating table is greater than the distance between the fixed pressing part and the upper end face of the operating table, and the device has the advantages of ensuring the extrusion effect of workpieces and realizing the processing of workpieces with different specifications.

Description

Flattening testing machine

Technical Field

The utility model relates to the technical field of test equipment, in particular to a flattening testing machine.

Background

In the conventional steel pipe flattening test, a tubular specimen is placed between two parallel plates, and is uniformly pressed by a press or other methods to a flattening distance prescribed by the relevant technical conditions, and after the tubular specimen is inspected for bending deformation, the tubular specimen is inspected for cracks and breaks to check for plasticity.

For example, chinese patent publication No. CN114904953a discloses a pipe flattening device, which utilizes a pressing device and a positioning device to mutually cooperate to fix a workpiece, but the pressing device and the positioning device penetrate into the workpiece, so that the flattening effect cannot be satisfied, and for flattening a workpiece with a smaller pipe diameter, the pressing device and the positioning device are difficult to fix the workpiece.

That is, the existing equipment cannot always meet the requirements of ensuring the extrusion effect of workpieces, and simultaneously, the workpieces with different specifications are processed.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, thereby providing a flattening testing machine.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a flattening testing machine comprising a hydraulic machine and an operating table, the hydraulic machine comprising a ram, the operating table being located below the ram, further comprising: a limiting device and a fixing device; the limiting device and the fixing device are arranged in pairs; the limiting devices comprise elastic limiting parts, the paired limiting devices are symmetrically arranged in the deformation direction of the tubular sample, and when the limiting devices are in a limiting state, the elastic limiting parts are movably attached to the outer periphery side of the tubular sample and have a tendency of moving in a direction away from the tubular sample; the fixing devices are symmetrically arranged at two axial ends of the tubular sample in pairs, each fixing device comprises a fixing and pressing part, and when the fixing and pressing parts are in a limiting state, the fixing and pressing parts are always and locally attached to the end surfaces of the tubular sample so as to limit the sliding or deflection of the tubular sample in the compression process; the distance between the elastic limiting part and the upper end face of the operating table is greater than the distance between the fixed pressing part and the upper end face of the operating table.

Preferably, the limiting device further comprises a locking member for fixing the elastic limiting portion on a side far from the tubular sample after the fixing device clamps the tubular sample.

Preferably, the elastic limiting part comprises a limiting plate and an elastic piece; one end of the elastic piece is fixedly arranged relative to the operation table, and the other end of the elastic piece is fixedly connected with the limiting plate, so that the limiting plate moves in a direction away from the circumferential side surface of the tubular sample after being stressed.

Preferably, the limiting device further comprises a fixed plate and a guide shaft; the fixed plate is fixedly arranged on the operation table; one end of the guide shaft is fixedly connected with the limiting plate, and the other end of the guide shaft is slidably arranged on the fixed plate; one end of the elastic piece is fixedly connected with the fixing plate.

Preferably, the locking member comprises a latch rod and a latch hole; the bolt hole is arranged on the guide shaft; and the bolt hole is inserted into the bolt hole when the fixing plate is far away from the end surface of one side of the operating platform.

Preferably, an inclined surface is arranged on one side of the limiting plate facing the tubular sample.

Preferably, the fixing device further comprises a fixing adjusting plate fixedly arranged on the operating platform; the fixed pressing part is arranged as a threaded rod which is in threaded fit with the fixed adjusting plate; one end of the threaded rod is attached to the end face of the tubular sample.

Preferably, the device further comprises a plurality of protection plates, wherein the protection plates are enclosed to form a processing cavity; the pressure head, the operating platform, the limiting device and the fixing device are located in the processing cavity.

Preferably, the protection plate is provided as a transparent plate; the protection plate is provided with a scale for indicating the size of the tubular sample.

Compared with the prior art, the utility model has the beneficial effects that: according to the flattening testing machine provided by the technical scheme, the elastic limiting part is arranged at a distance from the operating table to the plane, the distance from the elastic limiting part to the operating table is larger than the distance from the fixed pressing part to the plane, when a tubular sample with a large size needs to be processed, the elastic limiting part can limit the tubular sample, due to the elastic characteristic of the elastic limiting part, the elastic limiting part can also move to the side far away from the tubular sample when the tubular sample is pressed, and then the elastic limiting part can not influence the operation of the interference pressing head while the limiting effect of the elastic limiting part is kept, and meanwhile, the fixed pressing part of the fixing device can limit the sliding or deflection of the tubular sample in the pressed process, so that the fixing effect is better. When the small workpiece is processed and stored, the two symmetrical elastic limiting parts of the limiting device can uniformly apply force to the tubular sample from two sides of the tubular sample, so that the tubular sample can be positioned under the pressure head when the tubular sample is stressed and balanced, the force of the pressure head can be more uniformly transferred to the tubular sample, the extrusion effect is better, the tubular sample is independently compressed by the fixing compressing part of the fixing device, the limiting device is evacuated, and the tubular sample with small size can be further processed. The limiting devices and the fixing devices are symmetrically arranged to be matched with each other, so that the workpiece extrusion effect can be ensured, and workpieces with different specifications can be processed.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of the present utility model.

FIG. 2 is a schematic cut-away view of the present utility model.

FIG. 3 is a schematic view of the positioning device and the fixing device.

FIG. 4 is a schematic view of the positioning device and the fixing device.

Reference numerals illustrate:

1. a hydraulic press; 11. a pressure head; 12. a hydraulic control cabinet; 2. an operation table; 3. a limiting device; 31. an elastic limit part; 30. a locking member; 301. a latch rod; 302. a bolt hole; 311. a limiting plate; 3111. an inclined surface; 312. an elastic member; 32. a fixing plate; 33. a guide shaft; 4. a fixing device; 41. a fixed pressing part; 411. a threaded rod; 42. fixing an adjusting plate; 5. a protection plate; 51. a processing chamber; 100. a tubular specimen.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 4, the embodiment of the present utility model provides a flattening testing machine, which comprises a hydraulic machine 1 and an operation table 2, wherein the hydraulic machine 1 comprises a pressure head 11 and a hydraulic control cabinet 12, and the operation table 2 is positioned below the pressure head 11. Specifically, the device also comprises a limiting device 3 and a fixing device 4; wherein the limiting device 3 and the fixing device 4 are arranged in pairs; the limiting device 3 comprises elastic limiting parts 31, the paired limiting devices 3 are symmetrically arranged in the deformation direction of the tubular sample 100, and when the limiting device 3 is in a limiting state, the elastic limiting parts 31 are movably attached to the outer periphery side of the tubular sample 100 and have a tendency to move in a direction away from the tubular sample 100; the paired fixing devices 4 are symmetrically arranged at two ends of the tubular sample 100, the fixing devices 4 comprise fixing and pressing parts 41, and when the fixing and pressing parts 41 are in a limiting state, the fixing and pressing parts are always and locally attached to the end surfaces of the tubular sample 100 so as to limit the slippage or deflection of the tubular sample 100 in the compression process; the distance from the elastic limiting part 31 to the upper end surface of the operation table 2 is greater than the distance from the fixed pressing part 41 to the upper end surface of the operation table 2.

In this scheme, because the distance of elasticity spacing portion 31 from the plane that operation panel 2 is located is greater than the distance of fixed clamp portion 41 from the plane that operation panel 2 is located, when the tubular sample 100 that the size is big needs to be handled, elasticity spacing portion 31 can carry out spacingly to tubular sample 100, because its elasticity characteristic, when tubular sample 100 is pressed, it also can be to keeping away from tubular sample 100 one side to remove, and then make it can not influence interference pressure head 11 operation when keeping elasticity spacing portion 31 spacing effect, the fixed clamp portion 41 of fixing device 4 can restrict tubular sample 100 and slide or deflect in-process for fixed effect is better simultaneously. When the smaller workpiece is processed and stored, the two symmetrical elastic limiting parts 31 of the limiting device 3 can uniformly apply force to the tubular sample 100 from two sides of the tubular sample 100, so that the tubular sample 100 can be positioned under the pressure head 11 when the stress of the tubular sample 100 is balanced, the force of the pressure head 11 can be more uniformly transferred to the tubular sample 100, the extrusion effect is better, then the tubular sample 100 is independently compressed by the fixing compressing part 41 of the fixing device 4, the limiting device 3 is removed, and the tubular sample 100 with smaller size can be processed. Namely, the limiting device 3 and the fixing device 4 which are symmetrically arranged are matched with each other, so that the workpiece extrusion effect can be ensured, and workpieces with different specifications can be processed.

Since the tubular sample 100 is liable to splash with metal or scale scraps when subjected to a huge pressure during the test, and is liable to be dangerous if the test machine is not provided with a protective cover, in order to solve the problem, as shown in fig. 3, in this embodiment, the apparatus further comprises a plurality of protective plates 5, and the protective plates 5 are enclosed to form a processing cavity 51; the ram 11, the operating table 2, the limiting device 3 and the fixing device 4 are located in the processing cavity 51.

Further, the shielding plate 5 is provided as a transparent plate; the guard plate 5 is provided with a scale to indicate the size of the tubular specimen 100, and the pressing distance can be clearly observed.

The fixing device 4 may be provided in various structures, and may clamp the tubular sample 100. As shown in fig. 3, in this embodiment, the fixing device 4 further includes a fixing adjustment plate 42 fixed on the console 2; the fixed compression part 41 is provided with a threaded rod 411, and the threaded rod 411 is in threaded fit with the fixed adjusting plate 42; one end of the threaded rod 411 is attached to the end face of the tubular sample 100. Through the cooperation of threaded rod 411 and fixed regulating plate 42, can realize the regulation to threaded rod 411 and tubular sample 100 laminating position through rotating threaded rod 411 for this device can be applicable to the tubular sample 100 of different length.

The elastic stopper 31 may be provided in various configurations, and may be configured to position the tubular sample 100 by utilizing its elastic properties, to position the tubular sample 100 directly below the indenter 11, and to move to a side away from the tubular sample 100 according to the deformation of the tubular sample 100 when the tubular sample 100 is pressed.

As shown in fig. 3, in the present embodiment, the elastic stopper 31 includes a stopper plate 311 and an elastic member 312; one end of the elastic piece 312 is fixedly arranged relative to the operation table 2, the other end of the elastic piece 312 is fixedly connected with the limiting plate 311, so that the limiting plate 311 moves away from the circumferential side direction of the tubular sample 100 after being stressed, wherein the elastic piece 312 can be provided with a spring, an elastic rubber rod and other structures, and the spring is preferably used for increasing the deformation effect, namely, the limiting plate 311 can slide for a distance, so that the upper limit size of the diameter of the disposable tubular sample 100 is increased. Of course, in other embodiments, the elastic limiting portion 31 may be directly configured as an elastic plate structure or a structure of a folding plate and a spring plate.

Specifically, in this embodiment, the inclined surface 3111 is disposed on the side of the limiting plate 311 facing the tubular sample 100, and by the arrangement of the inclined surface 3111, the pressing head 11 can slide with the inclined surface 3111 in the downward moving process, so that the limiting plate 311 does not affect the operation of the pressing head 11, and meanwhile, the lower limit size of the diameter of the tubular sample 100 can be reduced, and in addition, the arrangement of the inclined surface 3111 also makes the apparatus have a wider application range, such as flattening rectangular pipes.

Further, if the limiting plate 311 is offset during sliding, a certain force is applied to the tubular sample 100, and thus the tubular sample 100 is deflected to some extent to affect extrusion, so in this embodiment, the limiting device 3 further includes a fixing plate 32 and a guiding shaft 33; the fixed plate 32 is fixedly arranged on the operation table 2; one end of the guide shaft 33 is fixedly connected with the limiting plate 311, and the other end is slidably arranged on the fixed plate 32; one end of the elastic piece 312 is fixedly connected with the fixed plate 32, and the limiting plate 311 can axially move along the guide shaft 33 through the mutual matching of the guide shaft 33 and the fixed plate 32.

As shown in fig. 3 and 4, in order that the limiting device 3 does not affect the pressing process when the workpiece with a small size is processed, in this embodiment, the limiting device 3 further includes a locking member 30 to fix the elastic limiting portion 31 at a side far from the tubular specimen 100 after the fixing device 4 clamps the tubular specimen 100.

Specifically, the locking member 30 may be configured in various configurations, and after the positioning of the tubular sample 100 is completed by the limiting device 3, and the tubular sample 100 is clamped by the fixing device 4, the elastic limiting portion 31 is fixed on a side far away from the tubular sample 100, so that the limiting device 3 does not affect the pressurizing process when a workpiece with a smaller size is processed.

In the present embodiment, the locking member 30 includes a latch lever 301 and a latch hole 302; the bolt hole 302 is provided on the guide shaft 33; when the latch hole 302 is located on the end surface of the fixing plate 32 on the side far from the console 2, the latch hole 302 is inserted into the latch hole 302. This arrangement allows for more convenient processing and installation of retaining member 30 by providing only one latch hole 302. Of course, in other embodiments, a positioning hole may be provided on the fixing plate 32, so that the latch rod 301, the latch hole 302 and the positioning hole cooperate to achieve positioning. Locking can be realized by means of fastening, thread fixing, elastic structure interference fit and the like.

The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.

Claims (9)

1. A flattening testing machine, including hydraulic press and operation panel, the hydraulic press includes the pressure head, the operation panel is located the pressure head below, its characterized in that still includes: a limiting device and a fixing device;

the limiting device and the fixing device are arranged in pairs;

the limiting devices comprise elastic limiting parts, the paired limiting devices are symmetrically arranged in the deformation direction of the tubular sample, and when the limiting devices are in a limiting state, the elastic limiting parts are movably attached to the outer periphery side of the tubular sample and have a tendency of moving in a direction away from the tubular sample;

the fixing devices are symmetrically arranged at two axial ends of the tubular sample in pairs, each fixing device comprises a fixing and pressing part, and when the fixing and pressing parts are in a limiting state, the fixing and pressing parts are always and locally attached to the end surfaces of the tubular sample so as to limit the sliding or deflection of the tubular sample in the compression process;

the distance between the elastic limiting part and the upper end face of the operating table is greater than the distance between the fixed pressing part and the upper end face of the operating table.

2. The flattening testing machine according to claim 1, wherein said stopper further includes a locking member to secure said elastic stopper on a side away from the tubular specimen after said securing means clamps the tubular specimen.

3. The flattening testing machine according to claim 2, wherein said resilient restraining portion includes a restraining plate and a resilient member;

one end of the elastic piece is fixedly arranged relative to the operation table, and the other end of the elastic piece is fixedly connected with the limiting plate, so that the limiting plate moves in a direction away from the circumferential side surface of the tubular sample after being stressed.

4. A flattening testing machine according to claim 3, wherein said stop means further comprises a fixed plate and a guide shaft;

the fixed plate is fixedly arranged on the operation table;

one end of the guide shaft is fixedly connected with the limiting plate, and the other end of the guide shaft is slidably arranged on the fixed plate;

one end of the elastic piece is fixedly connected with the fixing plate.

5. The flattening testing machine according to claim 4, wherein said retaining member includes a latch rod and a latch bore;

the bolt hole is arranged on the guide shaft;

and the bolt hole is inserted into the bolt hole when the fixing plate is far away from the end surface of one side of the operating platform.

6. A flattening testing machine according to claim 3, wherein the limiting plate is provided with an inclined surface on the side facing the tubular specimen.

7. The flattening testing machine according to claim 1, wherein said fixture further includes a fixed adjustment plate secured to said console;

the fixed pressing part is arranged as a threaded rod which is in threaded fit with the fixed adjusting plate;

one end of the threaded rod is attached to the end face of the tubular sample.

8. The flattening testing machine of claim 1, further comprising a plurality of shield plates, wherein the shield plates define a processing chamber;

the pressure head, the operating platform, the limiting device and the fixing device are located in the processing cavity.

9. The flattening testing machine according to claim 8, wherein said shield is provided as a transparent plate;

the protection plate is provided with a scale for indicating the size of the tubular sample.