Bending test tool

Abstract

The utility model discloses a bending test tool, and relates to the field of material performance detection equipment, in particular to a bending test tool which comprises a rack plate, three slotted holes diverging outwards are formed in the middle of the rack plate, linear guide rails are fixedly installed on the two sides of the back faces of the slotted holes, and the linear guide rails are arranged on the rack plate. A slidable sliding plate is installed behind the linear guide rail through a sliding block, a front bearing seat penetrating through the groove hole is fixedly installed in front of the sliding plate, and a rotatable rotating shaft is installed in the front bearing seat. Through cooperative arrangement of the linear guide rail, the four-jaw chuck, the fan-shaped tool and the sleeve, the bending test tool has the effect of being capable of clamping various materials, and through cooperative arrangement of the four-jaw chuck, the angle driving motor and the position adjusting motor, the bending test efficiency is improved. The bending test tool has the effect that the force application angle, the supporting angle and the supporting point can be changed in the detection process.

Description

Technical Field

[0001] This utility model relates to the field of material performance testing equipment, specifically a bending test fixture. Background Technology

[0002] In the field of materials science and engineering, bending tests are one of the important means to evaluate the mechanical properties of materials or components. Through bending tests, key performance indicators such as the flexibility, fatigue resistance, and fracture strength of materials can be detected. Since materials come in various shapes and sizes, the fixtures also come in various shapes and sizes. For example, thin copper plates need to be clamped, steel bars need to be sleeved, and plates need to be supported at both ends. In the current technology, a set of fixtures is generally only suitable for clamping one type of material, which leads to the need to make many types of fixtures. Not only is the manufacturing cost high, but changing and storing fixtures is also time-consuming and labor-intensive. In the current technology, the testing process generally involves repeated bending at fixed points, and the direction of force, the material support angle, and the support position cannot be changed. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a bending test fixture, which solves the problems mentioned in the background section.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a bending test fixture, comprising a frame plate, wherein three outwardly branching slots are provided in the middle of the frame plate, linear guide rails are fixedly installed on both sides of the back of the slots, a sliding plate is mounted behind the linear guide rails via a slider, a front bearing seat passing through the slots is fixedly installed in front of the sliding plate, a rotatable shaft is installed inside the front bearing seat, a turntable that rotates synchronously with the turntable is installed at the front end of the turntable, a four-jaw chuck that rotates synchronously with the turntable is installed in front of the turntable, four synchronously opening and closing jaws are provided in front of the four-jaw chuck, a fan-shaped fixture that opens and closes synchronously with the jaws is installed in front of the jaws, a sleeve is threadedly connected to the middle position of the arc surface of the fan-shaped fixture, an angle drive motor for driving the rotation of the turntable is installed behind the sliding plate, a lead screw nut is installed on one side of the sliding plate, and a transmission lead screw and a position adjustment motor for driving the movement of the lead screw nut are installed on the back of the frame plate.

[0007] Preferably, the frame plate has a border around the bottom back side, and the frame plate is vertically fixed to the bracket or table surface by the border.

[0008] Preferably, the angle between the three slots is 120°, with one slot pointing vertically upward and the other two slots symmetrically diverging downward.

[0009] Preferably, the sector-shaped tooling is fixedly connected to the claw by two stepped pins and a countersunk screw. The two stepped pins can quickly position the sector-shaped tooling, and loosening and tightening the countersunk screw can quickly disassemble and assemble the sector-shaped tooling.

[0010] Preferably, when the claw closes, the fan-shaped fixture retracts inward and clamps, and the fan-shaped fixture has a certain thickness, which allows it to install a sleeve with a large outer diameter, so that the sleeve has a through hole with a sufficiently large inner diameter. When the claw opens, the fan-shaped fixture also moves outward and forms a groove, and the inside of the fan-shaped fixture is hollowed out.

[0011] Preferably, when the two lower sliding plates slide towards the middle, the distance between the four-jaw chucks decreases or even touches each other, allowing it to lift materials with very short lengths. When the two lower sliding plates slide outwards, the distance between the four-jaw chucks increases, allowing it to lift materials with long dimensions. The distances that the two lower sliding plates move do not interfere with each other, so the material to be tested can be lifted horizontally or tilted.

[0012] This utility model provides a bending test fixture, which has the following beneficial effects:

[0013] 1. This bending test fixture, through the coordinated arrangement of linear guide rails, four-jaw chucks, fan-shaped fixtures, and sleeves, enables it to clamp various materials. By retracting the fan-shaped fixtures on the four-jaw chucks, thin sheets can be clamped; by cooperating with the fan-shaped fixtures on the two four-jaw chucks, plates can be lifted; and the sleeve can hold the rod. At the same time, by changing the distance between the two four-jaw chucks through the linear guide rails, it can be used to fix materials of various sizes, thus achieving the effect of clamping various types of materials.

[0014] 2. This bending test fixture, through the coordinated arrangement of a four-jaw chuck, an angle drive motor, and a position adjustment motor, enables the bending test fixture to change the applied force angle, support angle, and support point during the testing process. Since the four-jaw chuck can automatically change its angle through the angle drive motor and its position through the position adjustment motor, the position angle of the clamped material can be changed by changing the position angle of the four-jaw chuck. The applied force structure can also change the applied force angle by changing the position angle of the four-jaw chuck. Attached Figure Description

[0015] Figure 1 This is a structural schematic diagram of the front stereoscopic view of this utility model;

[0016] Figure 2 This is a structural schematic diagram of the rear-view stereoscopic view of the present invention;

[0017] Figure 3 This is a partial cross-sectional view of the present invention.

[0018] Figure 4This is a partial three-dimensional view of the structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of a partially exploded view of this utility model.

[0020] In the diagram: 1. Frame plate; 101. Slot; 102. Frame; 2. Linear guide rail; 3. Slide plate; 4. Front bearing housing; 5. Rotary shaft; 6. Turntable; 7. Four-jaw chuck; 701. Jaw; 8. Sector tooling; 9. Sleeve; 10. Angle drive motor; 11. Lead screw nut; 12. Transmission lead screw; 13. Position adjustment motor. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0022] Please see Figures 1 to 5 This utility model provides a technical solution: a bending test fixture, including a frame plate 1. Three outwardly branching slots 101 are opened in the middle of the frame plate 1. Linear guide rails 2 are fixedly installed on both sides of the back of the slots 101. A slidable slide plate 3 is installed behind the linear guide rails 2 via a slider. A front bearing seat 4 passing through the slots 101 is fixedly installed in front of the slide plate 3. A rotatable shaft 5 is installed inside the front bearing seat 4. A turntable 6 rotating synchronously with the shaft 5 is installed at the front end of the shaft 5. The turntable 6 is located in front of... A four-jaw chuck 7 is installed and rotates synchronously with it. Four synchronously opening and closing jaws 701 are set in front of the four-jaw chuck 7. A sector-shaped fixture 8 is installed in front of the jaws 701 and opens and closes synchronously with them. A sleeve 9 is threadedly connected to the middle position of the arc surface of the sector-shaped fixture 8. An angle drive motor 10 for driving the rotation of the drive shaft 5 is installed behind the slide plate 3. A lead screw nut 11 is installed on one side of the slide plate 3. A transmission lead screw 12 for driving the lead screw nut 11 and a position adjustment motor 13 are installed on the back of the frame plate 1.

[0023] Specifically, both the angle drive motor 10 and the position adjustment motor 13 are servo motors controlled by an absolute encoder, which can achieve high-precision positioning, fast response, power-off memory, multi-turn counting, and automatic diagnosis and monitoring. They can rotate at any angle as required with high precision, so that even if the angle drive motor 10 drives the four-jaw chuck 7 to rotate back and forth multiple times, the rotation error is very small, and even if the position adjustment motor 13 drives the four-jaw chuck 7 to reciprocate linear motion multiple times, the position error is very small.

[0024] Please see Figure 2A frame 102 is provided around the back of the rack plate 1, and the rack plate 1 is vertically fixed to the bracket or table surface by the frame 102.

[0025] Specifically, the frame 102 includes a bottom and two sides. Holes are drilled at the bottom and screws are used to fix it to the bracket or table. The width of the frame 102 is greater than the size of the protrusion of the back mechanism, so that the frame plate 1 can be laid back during maintenance.

[0026] Please see Figure 1 The angle between the three slots 101 is 120°, one of the slots 101 is vertically upward, and the other two slots 101 are symmetrically diverged downward.

[0027] Specifically, the vertical slot 101 at the top allows the upper four-jaw chuck 7 to move vertically up and down. The upper four-jaw chuck 7 is mainly used to clamp the structure that applies force. For example, a high-strength iron plate can be fixed in the upper four-jaw chuck 7. The angle can be adjusted by the angle drive motor 10 to make the iron plate vertically downward. At this time, when the upper four-jaw chuck 7 moves up and down, the iron plate can move vertically up and down, and the material can be bent downward. The two slots 101 at the bottom are symmetrical, so the two position adjustment motors 13 at the bottom only need to have the same speed to move downward synchronously. Therefore, it is convenient to adjust the material level and support spacing.

[0028] Please see Figure 5 The sector-shaped fixture 8 is fixedly connected to the claw 701 by two stepped pins and a countersunk screw. The two stepped pins can quickly position the sector-shaped fixture 8, and loosening and tightening the countersunk screw can quickly disassemble and assemble the sector-shaped fixture 8.

[0029] Specifically, the countersunk screw is positioned between the two stepped pins, but not in the middle; rather, it is on the inner side so that it is not obstructed by the sleeve 9, making it easy to tighten by hand. By unscrewing one countersunk screw, the sector-shaped fixture 8 can be removed. During installation, the two stepped pins are used for positioning, resulting in high installation repeatability and accuracy, which facilitates disassembly and replacement.

[0030] Please see Figure 4 When the claw 701 closes, the fan-shaped fixture 8 retracts inward and clamps. The fan-shaped fixture 8 has a certain thickness, which allows it to install a sleeve 9 with a larger outer diameter, so that the sleeve 9 has a through hole with a sufficiently large inner diameter. When the claw 701 opens, the fan-shaped fixture 8 also moves outward and forms a groove, and the inside of the fan-shaped fixture 8 is hollowed out.

[0031] Specifically, the fan-shaped fixture 8 has a certain thickness so that it can clamp thin sheets with a large width for inspection. The sleeve 9 has a through hole with a sufficiently large inner diameter so that a rod with a large diameter can be inserted for inspection. A plate with a certain thickness can be placed in the groove for inspection. The hollowing out of the inside of the fan-shaped fixture 8 can reduce its mass to reduce the moment of inertia, thereby reducing the load on the angle drive motor 10.

[0032] Please see Figure 1 When the two lower slide plates 3 slide towards the middle, the distance between the four-jaw chucks 7 decreases or even touches each other, allowing it to lift materials of very short length. When the two lower slide plates 3 slide outward, the distance between the four-jaw chucks 7 increases, allowing it to lift materials of long length. The distance the two lower slide plates 3 move does not interfere with each other, so it can lift the detection material horizontally or tilted.

[0033] Specifically, the two lower four-jaw chucks 7 are mainly used for clamping materials. Materials can be clamped using one four-jaw chuck 7, with one end of the material clamped and the other end suspended directly below the upper four-jaw chuck 7. Then, the upper four-jaw chuck 7 moves downward to bend the material. Materials can also be clamped using both four-jaw chucks 7, with both four-jaw chucks 7 supporting the material directly below the upper four-jaw chuck 7. Then, the upper four-jaw chuck 7 moves downward to bend the material. The further the two lower four-jaw chucks 7 move downward, the greater their distance becomes. Since the distance is adjustable, materials of various lengths can be clamped. When clamping materials using one four-jaw chuck 7, the angle of the material can be changed simply by rotating the four-jaw chuck 7. When clamping materials using two four-jaw chucks 7, if the heights of the two four-jaw chucks 7 are different, the material will be tilted when it is lifted.

[0034] This fixture can be used in various ways depending on the material and bending requirements. For example, if one end of a thin plate needs to be bent, one of the two lower four-jaw chucks 7 is driven to the top to clamp one end of the thin plate, leaving the other end suspended. The other chuck is driven to the bottom to avoid affecting the bending of the thin plate. Then, the uppermost third four-jaw chuck 7 clamps a long iron plate. After that, the four-jaw chuck 7 is rotated to adjust the angles of the thin plate and the long iron plate. Generally, the thin plate is in a horizontal position and the long iron plate is in a vertical position. Then, the uppermost third four-jaw chuck 7 moves downward and uses the long iron plate to bend one end of the horizontal thin plate. If the middle of the thin plate needs to be bent, the two lower four-jaw chucks 7 move downward and separate, then the thin plate is lifted by the fan-shaped fixtures 8 on both sides. The thin plate can be placed directly on top of the fan-shaped fixtures 8 or clamped between the fan-shaped fixtures 8. At this time, the two lower four-jaw chucks are adjusted. The height difference of 7 allows the angle of the thin plate to change. Generally, the thin plate is in a horizontal state and the long iron plate is in a vertical state. Then, the third four-jaw chuck 7 at the top moves downward and uses the long iron plate to bend the middle of the horizontal thin plate. If it is necessary to bend the rod, it can be operated in the same way as bending the thin plate. Alternatively, the two lower four-jaw chucks 7 can be moved downward and separated, and then the rod can be inserted into the sleeve 9 and fixed by the sleeve 9. If it is necessary to bend the rod back and forth, the height difference of the two lower four-jaw chucks 7 can be changed back and forth, or the two lower four-jaw chucks 7 can be rotated back and forth. If it is necessary to bend the sheet back and forth, one of the four-jaw chucks 7 can be used to clamp one end of the sheet and swing it back and forth. Then, the other four-jaw chucks 7 can be used to clamp a high-strength material close to the sheet, so that the sheet can be bent back and forth. The above method can be used to clamp and bend other materials. The clamping and bending methods are also achieved by the cooperation of the three four-jaw chucks 7.

[0035] In summary, this bending test fixture can clamp thin sheets by retracting the fan-shaped fixture 8 through the four-jaw chuck 7, lift the sheet material by cooperating with the fan-shaped fixture 8 on the two four-jaw chucks 7, and fit the rod through the sleeve 9. At the same time, by changing the distance between the two four-jaw chucks 7 through the linear guide rail 2, it can be used to fix materials of various sizes, thus achieving the effect of clamping various types of materials. Since the four-jaw chuck 7 can automatically change its angle through the angle drive motor 10 and automatically change its position through the position adjustment motor 13, the position angle of the clamped material can be changed by changing the position angle of the four-jaw chuck 7, and the force application structure can change the force application angle by changing the position angle of the four-jaw chuck 7.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bending test fixture, comprising a frame plate (1), characterized in that: The frame plate (1) has three outwardly branching slots (101) in the middle. Linear guide rails (2) are fixedly installed on both sides of the back of the slots (101). A sliding plate (3) is installed behind the linear guide rails (2) via a slider. A front bearing seat (4) passing through the slots (101) is fixedly installed in front of the sliding plate (3). A rotatable shaft (5) is installed inside the front bearing seat (4). A turntable (6) that rotates synchronously with the turntable (5) is installed at the front end of the turntable (5). A four-jaw chuck (7) that rotates synchronously with the turntable (6) is installed in front of the turntable (6). The four-jaw chuck (7) has four synchronously opening and closing jaws (701) in front of it. A fan-shaped fixture (8) that opens and closes synchronously with the jaws (701) is installed in front of it. A sleeve (9) is connected to the middle of the arc surface of the fan-shaped fixture (8) by a thread. An angle drive motor (10) for driving the rotating shaft (5) to rotate is installed behind the slide plate (3). A lead screw nut (11) is installed on one side of the slide plate (3). A transmission lead screw (12) for driving the lead screw nut (11) to move and a position adjustment motor (13) are installed on the back of the frame plate (1).

2. The bending test fixture according to claim 1, characterized in that: A frame (102) is provided around the back of the rack plate (1), and the rack plate (1) is vertically fixed on the bracket or table through the frame (102).

3. The bending test fixture according to claim 1, characterized in that: The angle between the three slots (101) is 120°, with one slot (101) pointing vertically upward and the other two slots (101) pointing symmetrically downward.

4. The bending test fixture according to claim 1, characterized in that: The sector-shaped fixture (8) is fixedly connected to the claw (701) by two stepped pins and a countersunk screw. The two stepped pins can quickly position the sector-shaped fixture (8), and loosening and tightening the countersunk screw can quickly disassemble and assemble the sector-shaped fixture (8).

5. The bending test fixture according to claim 1, characterized in that: When the claws close, the fan-shaped fixture retracts inward and clamps. The fan-shaped fixture has a certain thickness, which allows it to install a sleeve with a large outer diameter, so that the sleeve has a through hole with a sufficiently large inner diameter. When the claws open, the fan-shaped fixture also moves outward and forms a groove, and the inside of the fan-shaped fixture is hollowed out.

6. The bending test fixture according to claim 1, characterized in that: When the two lower slide plates (3) slide towards the middle, the distance between the four-jaw chuck (7) decreases or even touches each other, allowing it to lift materials of very short length. When the two lower slide plates (3) slide outward, the distance between the four-jaw chuck (7) increases, allowing it to lift materials of long length. The distances of movement of the two lower slide plates (3) do not interfere with each other, so the material to be tested can be lifted horizontally or tilted.

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