Metal fatigue durability testing device
By designing a metal fatigue durability test device, the installation shaft, drive mechanism, fixing fixture and limiting components are used to simulate the stress of the L-shaped workpiece, and the problem of difficulty in testing metal fatigue durability in the prior art is solved, and the L-shaped workpiece is achieved Stability and safety of the process of obtaining workpiece durability data and testing.
Patent Information
- Application Number
- CN202420894430.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-24
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-04-24
AI Technical Summary
The prior art is difficult to effectively test the metal fatigue durability of L-shaped workpieces, which leads to fatigue damage that is often difficult to detect in time and easily lead to accidents.
A metal fatigue durability test device is designed, including mounting shafts, drive mechanisms, fixing fixtures and limiting components. The mounting shaft drives the L-shaped workpiece to rotate, and the barrier surface on the fixing fixture limits the rotation of the sheet-shaped part, simulating the stress of the workpiece, and preventing the workpiece from being deviated.
The device can effectively test the durability data of L-shaped workpieces, ensure the stability and safety of the test process, the structure is simple and practical.
Smart Images
Figure CN222505986U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of metal testing, in particular to a metal fatigue durability testing device. Background Art
[0002] Metal fatigue refers to a phenomenon in which metal materials are damaged under the action of alternating stress. Under the action of alternating pressure, mechanical parts will form tiny cracks in local high stress areas after a period of time, and then the tiny cracks will gradually expand and break. Due to the characteristics of fatigue failure, such as suddenness in time, locality in location, and sensitivity to the environment and defects, fatigue failure is often not easy to be discovered in time and is easy to cause accidents. In the installation of shortwave antennas, an L-shaped workpiece is often used, which includes a columnar portion and a sheet portion vertically welded to one end of the columnar portion, and screw holes are opened on the sheet portion for installing and fixing parts. In actual use, the sheet portion will not only bear force but also apply torsional force to the columnar portion. Fatigue durability is a key parameter that directly affects the service life of the product. For this reason, there is an urgent need for a device that can perform fatigue durability testing on such L-shaped workpieces. Utility Model Content
[0003] The utility model aims to provide a metal fatigue durability testing device to solve the above problems in view of the deficiencies of the prior art.
[0004] In order to achieve the above requirements, the technical solution adopted by the utility model to solve its technical problems is:
[0005] The utility model provides a metal fatigue endurance testing device, which comprises an installation shaft for driving a workpiece to rotate, and a driving mechanism for driving the installation shaft to rotate; the installation shaft is arranged longitudinally, and a clamping groove is arranged on the upper end surface of the installation shaft corresponding to the columnar part of the workpiece; the device also comprises a fixing fixture for limiting the rotation of the workpiece in the horizontal direction, and two blocking surfaces are respectively arranged on the left and right sides of the sheet part of the workpiece on the fixing fixture; and a limiting component for limiting the workpiece in the vertical direction is also arranged on the upper end of the fixing fixture.
[0006] The metal fatigue endurance testing device described in the utility model, wherein the limit assembly includes a limit piece arranged close to the upper end surface of the fixed fixture, and also includes two sliding pieces respectively located on the left and right sides of the fixed fixture; the left and right ends of the limit piece are respectively fixedly connected to the two sliding pieces; sliding grooves are laterally arranged on the left and right side surfaces of the fixed fixture respectively corresponding to the two sliding pieces, and an extension part that slides with the sliding groove is arranged at one end of the sliding piece close to the fixed fixture.
[0007] In the metal fatigue endurance testing device of the utility model, the limiting member is in the shape of a long strip, and the limiting member is located above the second slot.
[0008] The metal fatigue durability testing device described in the utility model, wherein the fixing fixture is longitudinally provided with a through slot for accommodating a workpiece; the through slot includes a first slot corresponding to the columnar portion of the workpiece and a second slot corresponding to the sheet portion of the workpiece, and the two blocking surfaces are respectively located on the left and right inner walls of the second slot.
[0009] The metal fatigue endurance testing device of the utility model has two second slots, and the two second slots are symmetrically arranged at the front and rear sides of the first slot.
[0010] The metal fatigue endurance testing device described in the utility model, wherein the device also includes a shell, the fixing fixture is fixed on the upper end surface of the shell; a receiving cavity is opened in the shell, and the driving mechanism is located in the receiving cavity; a through hole is opened on the upper surface of the shell, and the installation shaft passes through the through hole and extends out of the shell; the installation shaft is located below the fixing fixture.
[0011] The metal fatigue endurance testing device described in the utility model further comprises a controller electrically connected to the driving mechanism, and the controller is located in the accommodating cavity; a speed regulating module and a direction regulating module are provided on the controller corresponding to the driving mechanism.
[0012] In the metal fatigue endurance testing device of the utility model, the driving mechanism is a motor, and the installation shaft is coaxially fixedly connected with the movable terminal of the driving mechanism.
[0013] The beneficial effects of the utility model are as follows: the utility model inserts the columnar part of the L-shaped workpiece into the slot of the mounting shaft, and the driving mechanism can be used to drive the L-shaped workpiece to rotate. At this time, the two blocking surfaces on the fixed fixture limit the rotation of the sheet part from the left and right sides to simulate the stress condition of the workpiece; the workpiece is twisted multiple times by controlling the driving mechanism to change the rotation direction and the number of rotations, etc., to obtain the durability data of the workpiece; the setting of the limit assembly can prevent the workpiece from being displaced in the vertical reverse direction during the rotation process; the utility model has a simple structure and strong practicality, and can perform metal fatigue durability tests on such L-shaped workpieces composed of a columnar part and a sheet part. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the utility model will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:
[0015] Figure 1 It is a cross-sectional view of the metal fatigue durability testing device of the utility model.
[0016] Figure 2 yes Figure 1 Enlarged schematic diagram at point A in the middle.
[0017] Figure 3 It is a top view of a fixing fixture in the metal fatigue durability testing device of the utility model.
[0018] Figure 4 It is a longitudinal cross-sectional schematic diagram of a fixing fixture in the metal fatigue durability testing device of the utility model.
[0019] Figure 5 The utility model is a schematic diagram of the connection structure between the mounting shaft and the workpiece in the metal fatigue endurance testing device.
[0020] In the figure: 1, workpiece; 1a, columnar portion; 1b, sheet portion; 2, mounting shaft; 21, slot; 3, driving mechanism; 4, fixing fixture; 4a, blocking surface; 41, slide groove; 42, through groove; 420, first slot; 421, second slot; 5, limit assembly; 51, limit member; 52, sliding member; 520, extension portion; 6, shell; 61, through hole; 62, accommodating chamber; 7, controller. DETAILED DESCRIPTION
[0021] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present invention and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.
[0022] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0023] "Multiple" means two or more. "And / or" describes the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.
[0024] Moreover, the terms "up, down, left, right, upper end, lower end, longitudinal" and the like indicating directions are all based on the posture and position of the device or equipment described in this solution during normal use.
[0025] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be described clearly and completely in combination with the technical solution in the embodiments of the utility model. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.
[0026] The metal fatigue durability testing device of the preferred embodiment of the utility model is as follows Figure 1-5 As shown, the device includes a mounting shaft 2 for driving the workpiece 1 to rotate, and a driving mechanism 3 for driving the mounting shaft 2 to rotate; the mounting shaft 2 is longitudinally arranged, and a slot 21 is provided on the upper end surface of the mounting shaft 2 corresponding to the columnar portion 1a of the workpiece 1; the device also includes a fixing fixture 4 for limiting the rotation of the workpiece 1 in the horizontal direction, and two blocking surfaces 4a are respectively provided on the fixing fixture 4 on the left and right sides corresponding to the sheet portion 1b of the workpiece 1; a limiting component 5 is also provided on the upper end of the fixing fixture 4 for limiting the workpiece 1 in the vertical direction.
[0027] In this embodiment, when the driving mechanism 3 drives the workpiece 1 on the mounting shaft 2 to rotate forward or reverse, the sheet portion 1b on the workpiece 1 will be tightly pressed against the blocking surface 4a on the fixed fixture 4, and the fixed fixture 4 can limit the rotation of the sheet portion 1b, which is used to simulate the situation that the sheet portion 1b of the workpiece 1 is subjected to torsional force during use; the slot 21 on the mounting shaft 2 is adapted to the columnar portion 1a of the workpiece 1, and the columnar portion 1a is inserted into the slot 21 to achieve a stable connection between the mounting shaft 2 and the workpiece 1, which is low in cost and easy to disassemble; the limit assembly 5 located at the upper end of the fixed fixture 4 can limit the workpiece 1 in the vertical direction, which is mainly used to prevent the workpiece 1 from being forced to deflect upward or pop out during rotation, thereby ensuring the stability and safety of the entire testing process.
[0028] The utility model inserts the columnar part of the L-shaped workpiece into the slot of the installation shaft, and can use the driving mechanism to drive the L-shaped workpiece to rotate. At this time, the two blocking surfaces on the fixed fixture limit the rotation of the sheet part from the left and right sides to simulate the stress condition of the workpiece; the workpiece is twisted multiple times by controlling the driving mechanism to change the rotation direction and the number of rotations, etc., to obtain the durability data of the workpiece; the setting of the limit component can prevent the workpiece from being offset in the vertical reverse direction during the rotation process; the utility model has a simple structure and strong practicality, and can perform metal fatigue durability tests on such L-shaped workpieces composed of a columnar part and a sheet part.
[0029] Preferably, the limiting assembly 5 includes a limiting member 51 arranged close to the upper end surface of the fixed fixture 4, and also includes two sliding members 52 respectively located on the left and right sides of the fixed fixture 4; the left and right ends of the limiting member 51 are respectively fixedly connected to the two sliding members 52; the left and right side surfaces of the fixed fixture 4 are respectively provided with slide grooves 41 corresponding to the two sliding members 52, and the end of the sliding member 52 close to the fixed fixture 4 is provided with an extension part 520 that slides with the slide groove 41; the matching arrangement of the sliding member 52 and the limiting member 51 can enable the sliding member 52 to drive the limiting member 51 to move along the length direction of the fixed fixture 4; when taking and placing the workpiece 1, the limiting member 51 needs to be pushed away to leave an installation position for the workpiece 1; during the test, the limiting member 51 needs to be pulled back so that it is located above the workpiece 1 to limit the workpiece 1; the slide groove 41 is in a straight line shape and is horizontally arranged along the length direction of the fixed fixture 4.
[0030] Preferably, the limiting member 51 is in the shape of an elongated strip and is located above the second slot 421 ; in this embodiment, the limiting member 51 is made of a metal material in the shape of an elongated strip, and in some other embodiments, elastic strips such as elastic bands may also be used; the limiting member 51 mainly acts on the sheet portion 1b of the workpiece 1 .
[0031] Preferably, a through slot 42 for accommodating the workpiece 1 is longitudinally opened on the fixing fixture 4; the through slot 42 includes a first slot position 420 corresponding to the columnar portion 1a of the workpiece 1 and a second slot position 421 corresponding to the sheet portion 1b of the workpiece 1, and the two blocking surfaces 4a are respectively located on the left and right inner walls of the second slot position 421; during testing, the workpiece 1 is vertically placed in the through slot 42 of the fixing fixture 4, the lower end of the workpiece 1 is inserted into the slot 21 of the mounting shaft 2, the sheet portion 1b of the workpiece 1 is located in the second slot position 421, and the columnar portion 1a is located in the first slot position 420. When the driving mechanism 3 drives the workpiece 1 to rotate, the through slot 42 will limit the workpiece 1 to simulate the torsional force condition of the workpiece 1.
[0032] Preferably, there are two second slots 421, and the two second slots 421 are symmetrically arranged on the front and rear sides of the first slot 420; since the sheet portion 1b in the L-shaped workpiece 1 will be connected to any one side of the columnar portion 1a, two second slots 421 are provided, respectively used to test the two sheet portions 1b facing different workpieces 1.
[0033] Preferably, the device also includes a shell 6, and the fixing fixture 4 is fixed on the upper end surface of the shell 6; a accommodating cavity 62 is opened in the shell 6, and the driving mechanism 3 is located in the accommodating cavity 62; a through hole 61 is opened on the upper surface of the shell 6, and the installation shaft 2 passes through the through hole 61 and extends out of the shell 6; the installation shaft 2 is located below the fixing fixture 4; in this embodiment, the shell 6 provides a placement space for the driving mechanism 3 and the controller 7, and also provides a position for the installation of the fixing fixture 4; the shell 6 can be opened when the parameters of the controller 7 need to be debugged, and a switch for the starting device is also provided on the shell 6.
[0034] Preferably, the device also includes a controller 7 electrically connected to the drive mechanism 3, and the controller 7 is located in the accommodating cavity 62; a speed adjustment module and a direction adjustment module are provided on the controller 7 corresponding to the drive mechanism 3; the setting of the controller 7 is convenient for changing the test parameters according to user needs, such as alternating forward and reverse rotation for a certain number of times within a specified time.
[0035] Preferably, the driving mechanism 3 is a motor, and the mounting shaft 2 is coaxially fixedly connected to the movable terminal of the driving mechanism 3; the controller 7 includes a transformer and a frequency converter for adjusting the voltage and current of the motor, which can be used to change the rotation direction of the motor and adjust the motor speed by changing the pulse frequency; the controller 7 can use existing technology.
[0036] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.
Claims
1. A metal fatigue durability testing device, characterized in that: The device includes an installation shaft that drives the workpiece to rotate, and a driving mechanism that drives the installation shaft to rotate; the installation shaft is arranged longitudinally, and a slot is provided on the upper end surface of the installation shaft corresponding to the columnar portion of the workpiece; the device also includes a fixed fixture that limits the rotation of the workpiece in the horizontal direction, and two blocking surfaces are respectively provided on the left and right sides of the fixed fixture corresponding to the sheet portion of the workpiece; the upper end of the fixed fixture is also provided with a limiting component that limits the workpiece in the vertical direction.
2. The metal fatigue durability testing device according to claim 1, characterized in that: The limiting assembly includes a limiting member arranged close to the upper end surface of the fixed fixture, and also includes two sliding members respectively located on the left and right sides of the fixed fixture; the left and right ends of the limiting member are respectively fixedly connected to the two sliding members; sliding grooves are laterally arranged on the left and right side surfaces of the fixed fixture respectively corresponding to the two sliding members, and an extension part that slides with the sliding groove is arranged at one end of the sliding member close to the fixed fixture.
3. The metal fatigue durability testing device according to claim 2, characterized in that: The limiting member is in the shape of an elongated strip and is located above the second slot.
4. The metal fatigue durability testing device according to claim 1 or 2, characterized in that: The fixing fixture is longitudinally provided with a through slot for accommodating the workpiece; the through slot includes a first slot corresponding to the columnar portion of the workpiece and a second slot corresponding to the sheet portion of the workpiece, and the two blocking surfaces are respectively located on the left and right inner side walls of the second slot.
5. The metal fatigue durability testing device according to claim 4, characterized in that: There are two second slots, and the two second slots are symmetrically arranged at the front and rear sides of the first slot.
6. The metal fatigue durability testing device according to claim 4, characterized in that: The device also includes a shell, the fixing fixture is fixed on the upper end surface of the shell; a receiving cavity is opened in the shell, and the driving mechanism is located in the receiving cavity; a through hole is opened on the upper surface of the shell, and the installation shaft passes through the through hole and extends out of the shell; the installation shaft is located below the fixing fixture.
7. The metal fatigue durability testing device according to claim 6, characterized in that: The device also includes a controller electrically connected to the driving mechanism, and the controller is located in the accommodating cavity; a speed regulating module and a direction regulating module are provided on the controller corresponding to the driving mechanism.
8. The metal fatigue durability testing device according to claim 7, characterized in that: The driving mechanism is a motor, and the mounting shaft is coaxially fixedly connected with a movable terminal of the driving mechanism.