CN217443070U

CN217443070U - Single-point bending fatigue testing device

Info

Publication number: CN217443070U
Application number: CN202220146109.6U
Authority: CN
Inventors: 张芝芳; 刘文迪; 傅继阳
Original assignee: Guangzhou University
Current assignee: Guangzhou University
Priority date: 2022-01-19
Filing date: 2022-01-19
Publication date: 2022-09-16
Anticipated expiration: 2032-01-19

Abstract

The utility model discloses a single-point bending fatigue testing device, which comprises a frame; the fixing assembly comprises a fixing frame and a clamp, the fixing frame is arranged on the rack, the clamp is connected with the fixing frame, and the clamp is used for clamping a test piece; the loading assembly comprises a motor, a driving disc, a sliding block and a transmission rod, the driving disc is rotatably connected with the rack, the motor is connected with the driving disc and drives the driving disc to rotate, a sliding groove is formed in the driving disc, the sliding block is slidably connected with the sliding groove and can be locked with the sliding groove, the first end of the transmission rod is hinged to the sliding block, and the second end of the transmission rod is used for being connected with a test piece. The utility model changes the position of the slide block in the chute and the eccentricity of the transmission rod, thereby changing the applied load and facilitating the load adjustment; and the whole structure is small and compact, and the device can be used for testing light materials. The utility model relates to a material property detects technical field.

Description

Single-point bending fatigue testing device

Technical Field

The utility model relates to a single-point bending fatigue testing device in the technical field of material performance detection.

Background

Bending fatigue, also known as flex fatigue, is a form of fatigue failure of a material, and refers to the process of material damage or even fracture under the action of alternating bending stress. The bending fatigue loading modes are generally divided into three-point bending, four-point bending and single-point bending. At present, bending performance tests and bending fatigue tests of materials at home and abroad mainly focus on three-point bending and four-point bending tests, and single-point bending tests are relatively less researched.

And the single-point bending apparatus commonly used in the market is generally comparatively large-scale at present, mainly used test heavy structures of dead weight such as large-scale wind-powered electricity generation blade, and this kind of device dead weight is great, and when only being used for carrying out fatigue test to heavy structures of quality such as large-scale wind-powered electricity generation blade itself, its additional mass's that brings to the primary structure influence just can be ignored, but if the cantilever structure of test is comparatively light and handy, that this testing arrangement's additional mass can't be ignored, and the test result can be very inaccurate. And most single point bending apparatus simulate the bending fatigue condition of material under the different loads through changing load weight, and the process of increase and decrease load weight is loaded down with trivial details and not good operation, still need set up the space in addition and place unnecessary counter weight, the going on of test work of being not convenient for.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a single-point bending fatigue test device, can carry out single-point bending fatigue test to light material, and the load of just being convenient for adjust and applying.

According to the utility model discloses the embodiment provides a single-point bending fatigue testing device, include:

a frame;

the fixing assembly comprises a fixing frame and a clamp, the fixing frame is arranged on the rack, the clamp is connected with the fixing frame, and the clamp is used for clamping a test piece;

the loading assembly comprises a motor, a driving disc, a sliding block and a transmission rod, wherein the driving disc is rotatably connected with the rack, the motor is connected with the driving disc and drives the driving disc to rotate, a sliding groove is formed in the driving disc, the sliding block is slidably connected with the sliding groove and can be locked with the sliding groove, the first end of the transmission rod is hinged to the sliding block, and the second end of the transmission rod is used for being connected with a test piece.

According to the utility model discloses, furtherly, the mount is equipped with a plurality of mounting holes, anchor clamps can with the connection can be dismantled to the mounting hole.

According to the utility model discloses the embodiment, furtherly, the rotation axis of driving-disc is the eccentric shaft.

According to the embodiment of the utility model provides a, furtherly, the spout passes through the centre of a circle and the rotation axis of driving-disc.

According to the utility model discloses, furtherly, still be equipped with the scale on the driving-disc, the scale is followed the spout sets up.

According to the utility model discloses, furtherly, single-point bending fatigue testing arrangement still includes drive assembly, drive assembly includes slide rail and transmission piece, the slide rail is installed in the frame, the transmission piece with slide rail sliding connection, the second end of transfer line with the transmission piece is articulated, the transmission piece is used for the centre gripping the test piece.

According to the utility model discloses, furtherly, the transfer line includes the body of rod and two pole heads, two the pole head all is equipped with the hinge hole, two the pole head can be dismantled respectively and be connected the both ends of the body of rod.

According to the embodiment of the utility model provides a, furtherly, the frame bottom still is equipped with a plurality of callus on the sole.

According to the utility model discloses, furtherly, single-point bending fatigue testing arrangement still includes control assembly, control assembly includes controller and force sensor, force sensor set up in on the transfer line, force sensor the motor all with the controller electricity is connected.

According to the utility model discloses, furtherly, control assembly still includes the display, the display with the controller electricity is connected, the display is used for showing the test result.

The utility model discloses beneficial effect includes at least: the utility model changes the position of the slide block in the chute and the eccentricity of the transmission rod, thereby changing the applied load and facilitating the load adjustment; and the whole structure is small and compact, and the device can be used for testing light materials.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

Fig. 1 is a front view of an embodiment of the present invention;

fig. 2 is a side view of an embodiment of the invention;

fig. 3 is a top view of an embodiment of the invention;

fig. 4 is a structural diagram of a driving plate in the embodiment of the present invention.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

Referring to fig. 1 to 2, the single-point bending fatigue testing apparatus in the embodiment of the present invention includes a frame 1, a fixing assembly 2, and a loading assembly 3. The frame 1 serves as a supporting component, and other components are installed and connected with the frame to form an integrated testing device, so that the whole transfer is facilitated. The fixing assembly 2 is an assembly for fixing the test piece 6, and includes a fixing frame 21 and a jig 22. The fixed frame 21 is installed on the machine frame 1, the fixture 22 is connected with the fixed frame 21, and the fixture 22 is provided with a clamping mechanism for clamping the test piece 6. In order to improve the structural stability, the fixing frame 21 includes two supports, and the two supports and the fixture 22 together form a gantry structure.

Referring to fig. 3, the loading assembly 3 is an assembly for bending-loading the test piece 6, and includes a motor, a drive disc 31, a slider 32, and a transmission rod 33. The driving disk 31 is rotatably connected with the frame 1, and the motor is connected with the driving disk 31 and drives the driving disk to rotate. The driving disk 31 is provided with a sliding slot 311, the slider 32 is slidably connected with the sliding slot 311, and the slider 32 is provided with a positioning slot, so that the slider 32 and the sliding slot 311 can be locked by using a bolt or a pin. The first end of the transmission rod 33 is hinged to the slide 32 and the second end of the transmission rod 33 is connected to the test piece 6. The eccentric amount of the transmission rod 33 is changed by adjusting the position of the slide block 32 in the slide slot 311, so that the loading amplitude is adjusted, and the adjustment is simpler and more convenient.

Specifically, the rack 1 is provided with a plurality of fixing holes, and the fixing component 2 can be connected with different fixing holes to change the distance between the fixing component 2 and the loading component 3 so as to adapt to different loading amplitudes.

Further, the fixing frame 21 is provided with a plurality of mounting holes 211 at equal intervals, and the clamp 22 can be detachably connected with at least two of the mounting holes 211, so that the height of the clamp 22 can be changed, and tests on test pieces 6 with different lengths can be carried out.

Further, referring to fig. 4, the rotation axis of the driving disc 31 is an eccentric axis, i.e. the projection of the rotation axis of the driving disc 31 on the top surface of the driving disc 31 is not coincident with the geometric center of the driving disc 31, and the rotation axis is not on the central axis of the driving disc 31, thereby increasing the adjustable range of the loading amplitude.

Further, the slide groove 311 passes through the center of the driving disc 31 and the rotation axis, thereby further increasing the adjustable range of the loading range.

Further, the driving plate 31 is further provided with a scale, and the scale is arranged along the sliding groove 311, so that the loading amplitude can be adjusted finely.

Further, the single-point bending fatigue testing device further comprises a transmission assembly 4, and the transmission assembly 4 comprises a sliding rail 41 and a transmission block 42. Slide rail 41 is installed on frame 1, and transmission piece 42 and slide rail 41 sliding connection, the second end and the transmission piece 42 of transfer line 33 are articulated, and transmission piece 42 centre gripping test piece 6. Through setting up transmission assembly 4 for the application of force direction of load does not take place the skew and stabilizes the loading to test piece 6, also plays the supporting role to drive rod 33.

Further, the transmission rod 33 comprises a rod body 331 and two rod heads 332, the two rod heads 332 are provided with hinge holes, and the two rod heads 332 are detachably connected to two ends of the rod body 331 respectively, so that the length of the transmission rod 33 can be changed by installing the rod bodies 331 with different lengths, and the test requirements of different tests can be met.

Further, 1 bottom of frame still is equipped with a plurality of callus on the sole 11, but its height-adjusting is in order to adjust 1 levelness of frame, and the bottom of callus on the sole 11 is equipped with anti-skidding bed course, increases the frictional force on this testing arrangement and ground.

Further, this single-point bending fatigue testing arrangement still includes control assembly 5, and control assembly 5 includes controller and force sensor, and force sensor sets up in order to record the load capacity volume of applying on transfer line 33, and force sensor, motor all are connected with the controller electricity to the controller can store the result that force sensor surveyed, also can control the drive of motor and record data such as the operating time of motor, the number of times of loading, makes things convenient for the later stage to transfer and is used for obtaining the test result.

Further, the control assembly 5 further comprises a display 51, the display 51 is electrically connected with the controller, the test result can be directly displayed, and a user can intuitively and quickly master the test condition conveniently.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims

1. A single point bending fatigue testing apparatus, comprising:

a frame (1);

the fixing assembly (2) comprises a fixing frame (21) and a clamp (22), the fixing frame (21) is installed on the rack (1), the clamp (22) is connected with the fixing frame (21), and the clamp (22) is used for clamping a test piece (6);

loading assembly (3), it includes motor, driving-disc (31), slider (32) and transfer line (33), driving-disc (31) with frame (1) rotate the connection, the motor with driving-disc (31) are connected and drive driving-disc (31) rotate, be equipped with spout (311) on driving-disc (31), slider (32) with spout (311) sliding connection just slider (32) can with spout (311) locking, the first end of transfer line (33) with slider (32) are articulated, the second end of transfer line (33) be used for with test piece (6) are connected.

2. The single point bending fatigue testing apparatus of claim 1, wherein: the fixing frame (21) is provided with a plurality of mounting holes (211), and the clamp (22) can be detachably connected with the mounting holes (211).

3. The single point bending fatigue testing apparatus of claim 1, wherein: the rotating shaft of the driving disc (31) is an eccentric shaft.

4. The single point bending fatigue testing apparatus of claim 1, wherein: the sliding groove (311) passes through the circle center of the driving disc (31) and the rotating shaft.

5. The single point bending fatigue testing apparatus of claim 1, wherein: the driving disc (31) is further provided with a scale, and the scale is arranged along the sliding groove (311).

6. The single point bending fatigue testing apparatus of claim 1, wherein: the single-point bending fatigue testing device further comprises a transmission assembly (4), the transmission assembly (4) comprises a sliding rail (41) and a transmission block (42), the sliding rail (41) is installed on the rack (1), the transmission block (42) is in sliding connection with the sliding rail (41), the second end of the transmission rod (33) is hinged to the transmission block (42), and the transmission block (42) is used for clamping the test piece (6).

7. The single point bending fatigue testing apparatus of claim 1, wherein: the transfer line (33) is including the body of rod (331) and two pole heads (332), two pole head (332) all are equipped with the hinge hole, two pole head (332) can dismantle the connection respectively at the both ends of the body of rod (331).

8. The single point bending fatigue testing apparatus of claim 1, wherein: a plurality of foot pads (11) are further arranged at the bottom of the machine frame (1).

9. The single point bending fatigue testing apparatus of any one of claims 1 to 8, wherein: the single-point bending fatigue testing device further comprises a control assembly (5), wherein the control assembly (5) comprises a controller and a force sensor, the force sensor is arranged on the transmission rod (33), and the force sensor and the motor are electrically connected with the controller.

10. The single point bending fatigue testing apparatus of claim 9, wherein: the control assembly (5) further comprises a display (51), the display (51) is electrically connected with the controller, and the display (51) is used for displaying the test result.