Metal material fatigue strength testing device

Abstract

The utility model discloses a metal material fatigue strength detection device, comprising: a bracket, on which two fixed plates are provided, one of which can slide up and down along the bracket, the fixed plate is provided with two first positioning plates that can move horizontally relative to or toward each other, the first positioning plate is provided with a fixed block, of the two relative fixed blocks, one of which is rotatably connected to a threaded rod, the other fixed block is provided with a threaded hole, the free end of the threaded rod passes through the threaded hole, wherein the bracket is provided with a driving component to drive the fixed plate to move up and down; four second positioning plates, the four second positioning plates are detachably connected to the four first positioning plates in a one-to-one correspondence. The utility model can realize the horizontal stretching of the metal sample for a certain distance and then the vertical reciprocating stretching by setting the relatively movable second positioning plate and two fixed plates, thereby improving the applicability of metal fatigue strength detection under different working conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of metal material testing equipment, and more specifically, to a metal material fatigue strength testing device. Background Art

[0002] The ability of metal materials to resist repeated deformation and fracture under external forces is a parameter for evaluating metal performance. The fatigue strength of metals needs to be tested according to usage requirements. The fatigue strength of metal materials is tested by metal material fatigue strength testing devices, but existing testing devices can only test longitudinal strength, which affects the applicability of the test. Utility Model Content

[0003] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described below.

[0004] Another object of the utility model is to provide a metal material fatigue strength testing device, which can achieve horizontal stretching of a metal sample for a certain distance and then vertical stretching by setting a relatively movable second positioning plate and two fixed plates, thereby improving the accuracy of metal strength testing.

[0005] In order to achieve these purposes and other advantages of the utility model, a metal material fatigue strength detection device is provided, comprising:

[0006] A bracket, on which two fixing plates are provided, one of which can slide up and down along the bracket, the fixing plate is provided with two first positioning plates that can move horizontally relative to or towards each other, the first positioning plate is provided with a fixing block, one of the two opposite fixing blocks is rotatably connected to a threaded rod, and the other fixing block is provided with a threaded hole, and the free end of the threaded rod passes through the threaded hole, wherein the bracket is provided with a driving assembly to drive the fixing plate to move up and down;

[0007] The four second positioning plates are detachably connected to the four first positioning plates in a one-to-one correspondence.

[0008] Preferably, the fixing plate is detachably connected to a connecting plate, the connecting plate is provided with two pairs of elongated sliding holes, the two pairs of sliding holes are arranged one-to-one corresponding to the two first positioning plates, the first positioning plates are provided with two threaded fixing rods, the fixing rods pass through the sliding holes and are fixed by nuts.

[0009] Preferably, the first positioning plate is provided with a limiting hole, and two corresponding limiting holes are detachably connected to the limiting plate.

[0010] Preferably, the driving assembly comprises two telescopic cylinders spaced apart on the bracket, and the output shafts of the telescopic cylinders are connected to the fixed plate to drive the fixed plate to move up and down.

[0011] Preferably, the bracket is provided with a pair of first slide rails, the fixed plate is provided with two first sliders, and the two first sliders are slidably connected with the two first slide rails in a one-to-one correspondence so that the fixed plate can move up and down along the bracket.

[0012] Preferably, two positioning rods are provided on the fixing block where the threaded rod is located, and two through holes are provided on the fixing block where the threaded hole is located, and the two positioning rods slide through the two through holes in a one-to-one correspondence.

[0013] Preferably, the fixing plate is provided with a connecting rod, the connecting rod is connected to two telescopic rods, a stopper is provided at the end of the telescopic rod, and a vertical rod is correspondingly provided on the first positioning plate, and the vertical rods on the two first positioning plates are located between the two stopper rods;

[0014] The telescopic rod comprises a first rod body with threads connected to the connecting rod and a second rod body with threads connected to the blocking rod. The free ends of the first rod body and the second rod body are connected by a threaded cap to adjust the distance between the two blocking rods.

[0015] Preferably, the second rod body is provided with a support column with a square horizontal section, the support column is provided with a connecting hole, the baffle rod is provided with a square hole with a rectangular horizontal section, the square hole is adapted to the support column, and a pin is inserted into the connecting hole.

[0016] The utility model at least has the following beneficial effects:

[0017] The utility model provides a relatively movable second positioning plate and two fixing plates, so that the metal sample can be stretched horizontally for a certain distance and then longitudinally, thereby improving the applicability of metal fatigue strength testing; the utility model provides a sliding hole to enable the first positioning plate to move horizontally; the utility model provides a limit plate to fix the first positioning plate before installing the sample, thereby avoiding relative movement of the two first positioning plates during the installation of the metal sample, thereby affecting the accuracy of the test; the utility model provides support columns and latches to not only fix the vertical rod but also facilitate the movement of the first positioning plate; the utility model provides a connecting rod, a telescopic rod and a vertical rod to fix the first positioning plate, thereby avoiding movement of the first positioning plate during longitudinal stretching, thereby improving the accuracy of metal fatigue strength testing.

[0018] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of a metal material fatigue strength testing device according to one of the technical solutions of the utility model;

[0020] Figure 2 This is a rear view of a metal material fatigue strength testing device according to one of the technical solutions of the utility model;

[0021] Figure 3 This is a rear view of a metal material fatigue strength testing device according to one of the technical solutions of the utility model;

[0022] Figure 4 This is a rear view of the connecting plate device described in one of the technical solutions described in the utility model. DETAILED DESCRIPTION

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0024] like Figure 1-4 As shown, the utility model provides a metal material fatigue strength detection device, comprising:

[0025] A bracket 1 is provided with two fixing plates 2, one of which can slide up and down along the bracket 1, and the fixing plate 2 is provided with two first positioning plates 7 which can move horizontally relative to or toward each other, and the first positioning plates 7 are provided with fixing blocks 9, and one of the two opposite fixing blocks 9 is rotatably connected to a threaded rod 10, and the other fixing block 9 is provided with a threaded hole, and the free end of the threaded rod 10 passes through the threaded hole, wherein the bracket 1 is provided with a driving component to drive the fixing plate 2 to move up and down;

[0026] The four second positioning plates 8 are detachably connected to the four first positioning plates 7 in a one-to-one correspondence.

[0027] In this technical solution, two fixed plates 2 are arranged up and down, and the slidable fixed plate 2 is located at the top. The two first positioning plates 7 on the same fixed plate 2 can move toward or away from each other. In the two fixed blocks 9 corresponding to the same fixed plate 2, a threaded rod 10 is horizontally arranged on one fixed block 9, and a threaded hole is correspondingly arranged on the other fixed block 9. The threaded rod 10 is arranged horizontally. The first positioning plate 7 is provided with a plurality of first fixing holes, and the second fixed plate is provided with a plurality of second fixing holes. The second fixing holes are arranged one by one corresponding to the first fixing holes. The metal sample is correspondingly provided with a plurality of hole bodies. The second fixing holes, the hole bodies and the first fixing holes are connected by bolts. The metal sample is in sheet form, and four second positioning plates jointly fix a metal sample.

[0028] During use, the metal sample is fixed between the four second positioning plates 8 and the four first positioning plates 7, and the distance between the two relative first positioning plates 7 is adjusted by the threaded rod 10 to perform transverse stretching on the metal sample. Then, the fixing plate 2 is driven up and down by the driving assembly to perform reciprocating longitudinal stretching to test the fatigue strength of the metal material.

[0029] By adopting this technical solution, the utility model can realize the horizontal stretching of the metal sample for a certain distance and then the vertical stretching by arranging the relatively movable second positioning plate 8 and the two fixing plates 2, thereby improving the applicability of metal fatigue strength testing.

[0030] In another technical solution, the fixing plate 2 is detachably connected to a connecting plate 3, and the connecting plate 3 is provided with two pairs of long strip-shaped sliding holes 20, and the two pairs of sliding holes 20 are arranged one-to-one with the two first positioning plates 7. Each fixing plate 2 is connected to a connecting plate 3, and the first positioning plate 7 is provided with two threaded fixing rods, which are perpendicular to the first positioning plate 7. The fixing rods pass through the sliding holes 20 and are fixed by nuts, and the diameter of the fixing rods is slightly smaller than the width of the sliding holes 20. With this technical solution, the utility model realizes that the first positioning plate 7 can move horizontally by setting the sliding holes 20.

[0031] In another technical solution, the first positioning plate 7 is provided with a limiting hole, and the two corresponding limiting holes (i.e., the limiting holes on the two first positioning plates 7 corresponding to the same fixed plate 2) are detachably connected to the limiting plate 12, and the limiting holes are connected to the limiting plate 12 by bolts. Before installing the metal sample, the two first positioning plates 7 are first fixed by the limiting plate 12, and then the metal sample is fixed between the first positioning plate 7 and the second positioning plate 8 (the limiting plate 12 and the metal sample are located on different sides of the first positioning plate 7), and the limiting plate 12 is separated from the first positioning plate 7 after the fixing is completed. With this technical solution, the utility model fixes the first positioning plate 7 before installing the sample by setting the limiting plate 12, thereby avoiding the relative movement of the two first positioning plates 7 during the installation of the metal sample, which affects the accuracy of the detection.

[0032] In another technical solution, the driving assembly includes two telescopic cylinders 4 arranged at intervals on the bracket 1, and the output shafts of the telescopic cylinders 4 are connected to the fixed plate 2 to drive the fixed plate 2 to move up and down. With this technical solution, the utility model drives the fixed plate 2 to move up and down by setting the telescopic cylinders 4.

[0033] In another technical solution, the bracket 1 is provided with a pair of first slide rails 5, and the fixed plate 2 is provided with two first sliders 6, and the two first sliders 6 are slidably connected with the two first slide rails 5 in a one-to-one correspondence to enable the fixed plate 2 to move up and down along the bracket 1. With this technical solution, the fixed plate 2 can move up and down along the bracket 1.

[0034] In another technical solution, two positioning rods 11 are provided on the fixing block 9 where the threaded rod 10 is located. The positioning rods 11 are arranged horizontally, and the threaded rod is located between the two positioning rods. Two through holes are provided on the fixing block 9 where the threaded hole is located, and the two positioning rods 11 slide through the two through holes in a one-to-one correspondence. With this technical solution, the first positioning plate 7 can be relatively moved horizontally.

[0035] In another technical solution, the fixing plate 2 is provided with a connecting rod 13, the connecting rod 13 is connected to two telescopic rods, a stopper 17 is provided at the end of the telescopic rod, and a vertical rod 19 is correspondingly provided on the first positioning plate 7, and the vertical rods 19 on the two first positioning plates 7 are located between the two stopper rods 17;

[0036] The telescopic rod comprises a first rod body 14 with threads connected to the connecting rod 13, and a second rod body 16 with threads connected to the baffle plate. The free ends of the first rod body 14 and the second rod body 16 are connected by a threaded cap 15 to adjust the distance between the two baffle rods 17. With this technical solution, the utility model fixes the first positioning plate 7 by setting the connecting rod 13, the telescopic rod, and the vertical rod 19, thereby preventing the first positioning plate 7 from moving when stretched longitudinally, and improving the accuracy of metal fatigue strength detection.

[0037] In another technical solution, the second rod body 16 is provided with a support column 18 with a square horizontal section, the support column 18 is perpendicular to the second rod body 16, the support column 18 is provided with a connecting hole, the blocking rod 17 is provided with a square hole with a rectangular horizontal section, the square hole is adapted to the support column 18, a latch is inserted in the connecting hole, when the blocking rod 17 is needed to block the vertical rod 19, the blocking rod is installed on the support column 18, when the first positioning plate 7 needs to be moved, the blocking rod 17 is separated from the support column 18. With this technical solution, the utility model can not only fix the vertical rod 19 but also facilitate the movement of the first positioning plate 7 by setting the support column 18 and the latch.

[0038] The number of devices and processing scale described here are used to simplify the description of the utility model. The application, modification and variation of the metal material fatigue strength testing device of the utility model are obvious to those skilled in the art.

[0039] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A metal material fatigue strength testing device, characterized in that: include: A bracket, on which two fixing plates are provided, one of which can slide up and down along the bracket, the fixing plate is provided with two first positioning plates that can move horizontally relative to or towards each other, the first positioning plate is provided with a fixing block, one of the two opposite fixing blocks is rotatably connected to a threaded rod, and the other fixing block is provided with a threaded hole, and the free end of the threaded rod passes through the threaded hole, wherein the bracket is provided with a driving assembly to drive the fixing plate to move up and down; The four second positioning plates are detachably connected to the four first positioning plates in a one-to-one correspondence.

2. The metal material fatigue strength testing device according to claim 1, characterized in that: The fixing plate is detachably connected to a connecting plate, the connecting plate is provided with two pairs of long strip-shaped sliding holes, the two pairs of sliding holes are arranged one-to-one corresponding to the two first positioning plates, the first positioning plate is provided with two threaded fixing rods, the fixing rods pass through the sliding holes and are fixed by nuts.

3. The metal material fatigue strength testing device according to claim 1, characterized in that: The first positioning plate is provided with a limiting hole, and two corresponding limiting holes are detachably connected to the limiting plate.

4. The metal material fatigue strength testing device according to claim 1, characterized in that: The driving assembly comprises two telescopic cylinders which are spaced apart on the bracket, and the output shafts of the telescopic cylinders are connected to the fixing plate to drive the fixing plate to move up and down.

5. The metal material fatigue strength testing device according to claim 1, characterized in that: The bracket is provided with a pair of first slide rails, the fixed plate is provided with two first sliders, and the two first sliders are slidably connected with the two first slide rails in a one-to-one correspondence so that the fixed plate can move up and down along the bracket.

6. The metal material fatigue strength testing device according to claim 1, characterized in that: The fixing block where the threaded rod is located is provided with two positioning rods, and the fixing block where the threaded hole is located is provided with two through holes, and the two positioning rods slide through the two through holes in a one-to-one correspondence.

7. The metal material fatigue strength testing device according to claim 1, characterized in that: The fixing plate is provided with a connecting rod, the connecting rod is connected to two telescopic rods, a stopper is provided at the end of the telescopic rod, and a vertical rod is correspondingly provided on the first positioning plate, and the vertical rods on the two first positioning plates are located between the two stopper rods; The telescopic rod comprises a first rod body with threads connected to the connecting rod and a second rod body with threads connected to the blocking rod. The free ends of the first rod body and the second rod body are connected by a threaded cap to adjust the distance between the two blocking rods.

8. The metal material fatigue strength testing device according to claim 7, characterized in that: The second rod body is provided with a support column with a square horizontal section, the support column is provided with a connecting hole, the blocking rod is provided with a square hole with a rectangular horizontal section, the square hole is adapted to the support column, and a latch is inserted into the connecting hole.

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