Anti-torsion tool for fatigue machine

Abstract

The utility model relates to the technical field of material mechanical property tests, in particular to a fatigue machine torsion prevention tool, which comprises a hoop component, an upper hoop and a lower hoop. The hoop component consists of mutually symmetrical support plates and comprises an upper hoop and a lower hoop which are arranged in parallel up and down; limiting columns are symmetrically arranged on the two sides of the lower hoop, and one end of each limiting column is fixedly connected with the lower hoop through a fixing base. Shaft sleeves are symmetrically arranged at the two ends of the upper hoop, and the limiting columns penetrate through the shaft sleeves to be connected with the upper hoop in an up-down sliding mode. A circular through hole through which the hydraulic chuck can pass is formed in the middle of the upper hoop and the lower hoop, and a clamping element is further arranged at the lower part of the hoop assembly. The device has the beneficial effects that the upper hoop slides up and down on the limiting column under the driving of the hydraulic device, so that a sample is prevented from twisting in a test process, and the influence of external torsion on a test result is reduced, thereby improving the accuracy of a mechanical property test.

Description

Technical Field

[0001] The utility model relates to the technical field of material mechanical property testing, in particular to an anti-torsion tooling for a fatigue machine. Background Art

[0002] Fatigue testing machines are used to test the fatigue properties of metals and alloys under specific conditions, including tension, compression, alternating tension-compression loads, bending, and torsion. During fatigue testing, specimen torsion often affects the accuracy of test results, especially when the specimen is subjected to unexpected applied torque. Existing fatigue testing machines and their fixtures often lack effective control over specimen torsion, leading to biased test results. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an anti-torsion tooling for a fatigue machine, which effectively solves the problems in the background technology.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a fatigue machine anti-torsion tooling, characterized in that it includes:

[0005] The clamp assembly is composed of mutually symmetrical bracket plates, including an upper clamp and a lower clamp arranged in parallel above and below;

[0006] Limiting posts are symmetrically arranged on both sides of the lower hoop, and one end of the limiting post is fixedly connected to the lower hoop through a fixing seat;

[0007] Among them, shaft sleeves are symmetrically provided at both ends of the upper clamp, and the limiting column passes through the shaft sleeves and is slidably connected to the upper clamp up and down; a circular through hole for the hydraulic chuck to pass through is provided in the middle of the upper clamp and the lower clamp, and a clamping element is also provided at the lower part of the upper clamp and the lower clamp.

[0008] Furthermore, a hole wall is provided on the outer surface of the limiting column; and a steel ball is provided in the hole wall.

[0009] Furthermore, the clamping element is composed of two semicircular clamping rings symmetrically glued to each other; the semicircular clamping ring is arranged on the lower side of the circular through hole;

[0010] The two ends of the semicircular clamp are symmetrically provided with connecting holes.

[0011] Furthermore, a connecting hole is provided on the side surface of the semicircular clamping ring, and is fixedly connected to the upper clamping hoop and the lower clamping hoop through the connecting hole.

[0012] Furthermore, the support plates are connected together by the clamping elements.

[0013] Furthermore, the lower clamp is connected to the cylinder of the hydraulic device, and the piston of the hydraulic device passes through the circular through hole in the middle of the lower clamp and is fixedly connected to the upper clamp.

[0014] Furthermore, the base includes a square fixing plate and a fixing ring fixedly connected to the fixing plate; the fixing plate is fixedly connected to the lower clamp, and one end of the limiting column is fixedly connected to the base by being inserted into the fixing ring.

[0015] Furthermore, the upper clamp is symmetrically provided with limiting holes at both ends;

[0016] The sleeve includes a bottom plate and a slip ring, the bottom plate is fixed to the upper part of the upper clamp, and the slip ring is fixedly connected to the bottom plate through the limiting hole; the bottom plate is provided with an axial hole with the same size as the inner diameter of the slip ring; the limiting column passes through the slip ring and is slidably connected to the bottom plate and the upper clamp up and down.

[0017] The beneficial effect of the present invention is that the upper clamp slides up and down on the limit column under the drive of the hydraulic device, preventing the specimen from twisting during the test, reducing the influence of the external torque on the test results, and thus improving the accuracy of the mechanical performance test; at the same time, through the combined design of the clamp assembly and the limit column, the overall structure of the tooling is more stable and can withstand larger test loads; in addition, the tooling has a simple structure, is easy to install, and has low maintenance costs, and is suitable for use in a variety of fatigue test scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic structural diagram of the anti-torsion tooling for a fatigue machine in an embodiment of the present utility model;

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 for Figure 1 Enlarged view of point B in the middle.

[0022] Figure numerals: 1. clamp assembly; 11. upper clamp; 12. lower clamp; 2. limit column; 3. fixing seat; 31. fixing plate; 32. fixing ring; 4. sleeve; 41. bottom plate; 42. slip ring; 5. circular through hole; 6. clamping element; 61. connecting hole; 7. steel ball. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] like Figures 1 to 3 The fatigue machine anti-torsion tooling shown includes: a clamp assembly 1 composed of mutually symmetrical bracket plates, including an upper clamp 11 and a lower clamp 12 arranged in parallel above and below; limiting columns 2 are symmetrically arranged on both sides of the lower clamp 12, and one end of the limiting column 2 is fixedly connected to the lower clamp 12 through a fixing seat 3; wherein, shaft sleeves 4 are symmetrically provided at both ends of the upper clamp 11, and the limiting column 2 passes through the shaft sleeve 4 and is slidably connected to the upper clamp 11 up and down; a circular through hole 5 for the hydraulic chuck to pass through is provided in the middle of the upper clamp 11 and the lower clamp 12, and a clamping element 6 is provided at the lower part of the upper clamp 11 and the lower clamp 12.

[0027] The implementation process of the present invention is that the cylinder of the hydraulic device is installed at the lower part of the lower clamp 12, and is clamped by the clamping element 6 below the lower clamp 12. The hydraulic chuck of the hydraulic device extends through the circular through hole 5 in the middle of the lower clamp 12 to the circular through hole 5 of the upper clamp 11 above, and is clamped by the clamping element 6 below the upper clamp 11. Under the push of the hydraulic cylinder, the upper clamp 11 and the shaft sleeve 4 connected thereto reciprocate on the limit column 2. The beneficial effect of the present invention is that the upper clamp slides up and down on the limit column under the drive of the hydraulic device, preventing the specimen from twisting during the test, reducing the influence of the external torque on the test results, and thus improving the accuracy of the mechanical performance test; at the same time, through the combined design of the clamp assembly and the limit column, the overall structure of the tooling is more stable and can withstand a larger test load; in addition, the tooling has a simple structure, is easy to install, and has low maintenance costs, and is suitable for use in various fatigue test scenarios.

[0028] In the utility model, a hole wall is provided on the outer surface of the limit column 2; a steel ball 7 is provided in the hole wall. The rolling friction between the steel ball 7 and the contact surface is much smaller than the sliding friction, which can significantly reduce the friction force of the parts during relative motion, thereby improving the overall stability and operation accuracy of the equipment; due to the rolling characteristics of the steel ball, it can effectively reduce the direct contact and wear between the limit column and the contact surface, thereby extending the service life of the limit column and other related components.

[0029] In this solution, the clamping element 6 is composed of two semicircular clamping rings that are symmetrically glued to each other; the semicircular clamping ring is arranged on the lower side of the circular through hole 5; connecting holes 61 are symmetrically provided at both ends of the semicircular clamping ring; the two mutually symmetrical semicircular clamping rings can be evenly clamped on the parts that need to be fixed to ensure uniform force, avoiding the problems of stress concentration and unstable clamping that may be caused by single-point clamping; the design of the semicircular clamping ring makes its contact area with the clamped part relatively large, which is conducive to forming a tighter fit and improving the clamping effect.

[0030] On the basis of the above preferred embodiment, a connecting hole 61 is provided on the side of the semicircular clamping ring, which is fixedly connected to the upper clamping hoop 11 and the lower clamping hoop 12 through the connecting hole 61. The setting of the connecting hole 61 enables the semicircular clamping ring to be accurately aligned and fixed with the upper clamping hoop 11 and the lower clamping hoop 12, thereby improving the installation accuracy.

[0031] In the present invention, the bracket plates are connected together by clamping elements 6, and the clamping elements 6 are connected through connecting holes. The left and right symmetrical bracket plates are fixedly connected due to mutually symmetrical semicircular clamping rings. The mutually symmetrical bracket plates are connected through connecting holes 61, so that the overall structure is connected together and is more firm.

[0032] In the present invention, the lower clamp 12 is connected to the cylinder body of the hydraulic device, and the piston of the hydraulic device passes through the circular through hole 5 in the middle of the lower clamp 12 and is fixedly connected to the upper clamp 11. The connection between the lower clamp 12 and the hydraulic cylinder body and the fixed connection between the piston and the upper clamp 11 form a stable mechanical structure, which helps to disperse and withstand the force from the clamped parts or workload, thereby enhancing the stability and load-bearing capacity of the entire device.

[0033] In the present invention, the fixing seat 3 includes a square fixing plate 31 and a fixing ring 32 fixedly connected to the fixing plate 31; the fixing plate 31 is fixedly connected to the lower clamp 12, and one end of the limiting column 2 is fixedly connected to the fixing seat 3 by inserting the fixing ring 32. The square fixing plate 31 provides a stable support base, which helps to disperse and withstand the force from the limiting column 2 and the clamped parts, thereby improving the rigidity of the overall structure.

[0034] In the present invention, limiting holes are symmetrically provided at both ends of the upper clamp 11; the sleeve 4 includes a bottom plate 41 and a slip ring 42, the bottom plate 41 is fixed to the upper part of the upper clamp 11, and the slip ring 42 is fixedly connected to the bottom plate 41 through the limiting hole, ensuring a stable connection between the sleeve 4 and the upper clamp 11; the bottom plate 41 is provided with an axial hole with the same inner diameter as the slip ring 42; the limiting column 2 passes through the slip ring 42 and the bottom plate 41 and is slidably connected to the upper clamp 11 up and down, further enhancing the stability of the structure; the sliding connection between the limiting column 2 and the upper clamp 11 and the sleeve 4 not only allows a certain relative movement, but also provides sufficient support and limiting effects when necessary.

[0035] Those skilled in the art should understand that the present invention is not limited to the above-described embodiments. The above-described embodiments and the specification are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A fatigue machine anti-torsion tooling, characterized in that: include: A clamp assembly (1), the clamp assembly (1) being composed of mutually symmetrical support plates, including an upper clamp (11) and a lower clamp (12) arranged in parallel above and below; Limiting columns (2) are symmetrically arranged on both sides of the lower hoop (12), and one end of the limiting column (2) is fixedly connected to the lower hoop (12) via a fixing seat (3); Wherein, shaft sleeves (4) are symmetrically provided at both ends of the upper hoop (11), and the limiting column (2) passes through the shaft sleeves (4) and is slidably connected to the upper hoop (11) in an upward and downward manner; a circular through hole (5) for a hydraulic chuck to pass through is provided in the middle of each of the upper hoop (11) and the lower hoop (12), and a clamping element (6) is provided at the lower part of each of the upper hoop (11) and the lower hoop (12); The clamping element (6) is composed of two semicircular clamping rings symmetrically glued to each other; the semicircular clamping ring is arranged on the lower side of the circular through hole (5); Connecting holes (61) are symmetrically provided at both ends of the semicircular snap ring.

2. The anti-torsion tooling for fatigue machine according to claim 1, characterized in that: A connecting hole (61) is provided on the side surface of the semicircular clamping ring, and is fixedly connected to the upper clamping hoop (11) and the lower clamping hoop (12) through the connecting hole (61); The lower hoop (12) is connected to the cylinder body of the hydraulic device, and the piston rod of the hydraulic device passes through the circular through hole (5) in the middle of the lower hoop (12) and is fixedly connected to the upper hoop (11) through the hydraulic chuck.

3. The anti-torsion tooling for fatigue machine according to claim 1, characterized in that: A hole wall is provided on the outer surface of the limiting column (2); and a steel ball (7) is provided in the hole wall.

4. The anti-torsion tooling for fatigue machine according to claim 1, characterized in that: The support plates are connected together via the clamping elements (6).

5. The anti-torsion tooling for fatigue machine according to claim 1, characterized in that: The fixing seat (3) comprises a square fixing plate (31) and a fixing ring (32) fixedly connected to the fixing plate (31); the fixing plate (31) is fixedly connected to the lower hoop (12), and one end of the limiting column (2) is fixedly connected to the fixing seat (3) by being inserted into the fixing ring (32).

6. The anti-torsion tooling for fatigue machine according to claim 1, characterized in that: The upper hoop (11) is symmetrically provided with limiting holes at both ends; The shaft sleeve (4) comprises a bottom plate (41) and a slip ring (42), wherein the bottom plate (41) is fixed to the upper part of the upper hoop (11), and the slip ring (42) passes through the limiting hole and is fixedly connected to the bottom plate (41); the bottom plate (41) is provided with an axial hole having the same inner diameter as the slip ring (42); the limiting column (2) passes through the slip ring (42) and is slidably connected to the bottom plate (41) and the upper hoop (11) in an upward and downward manner.

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