Clamping structure for plate tensile test

Abstract

The utility model relates to the technical field of plate clamps, in particular to a plate tensile test clamping structure which comprises a mounting part, a connecting part is arranged on one side of the mounting part, a mounting groove is formed in the side, away from the connecting part, of the mounting part, cam rollers are rotatably mounted on the two sides of the mounting groove, and the section of each cam roller is in a cam shape. A clamping plate is hinged to the side, farthest from the rotating shaft, of the cam roller, anti-skid lines are arranged on the side, away from the cam roller, of the clamping plate, and a torsional spring is installed on the rotating shaft of the cam roller and drives the cam roller to rotate towards the side where the clamping plate is located. According to the clamping structure, through the two cam rollers, the clamping plate part is gradually and automatically clamped when the rectangular sheet is stretched, the use mode of the clamping structure is simplified, clamping is facilitated, and the mounting efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of plate clamps, and in particular to a clamping structure for plate tensile testing. Background Art

[0002] Tensile test is the main test method for evaluating the basic mechanical properties and formability of sheet metal. The data obtained from the tensile test can be used to determine the elastic limit, elongation, elastic modulus, proportional limit, area reduction, tensile strength, yield point, yield strength and other tensile performance indicators of the material.

[0003] During the tensile test, the two ends of the metal sheet are clamped in a clamping structure. The clamping structure is installed on a hydraulic press or other equipment to stretch the metal disc. The clamping structure is generally mechanical clamping or pneumatic or hydraulic clamping. Among them, the mechanical type requires adjustment and the speed is slow. Pneumatic and hydraulic clamping require auxiliary power structure and the structure is more complicated. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this application is to provide an easy-to-use clamping structure for plate tensile testing.

[0005] The above-mentioned application objectives of this application are achieved through the following technical solutions:

[0006] A clamping structure for plate tensile testing, comprising:

[0007] An installation portion, wherein a connecting portion is provided on one side of the installation portion;

[0008] a mounting groove, the mounting groove being provided on a side of the mounting portion away from the connecting portion;

[0009] Cam rollers, two of which are rotatably mounted on both sides of the mounting groove, and the cross-section of the cam rollers is cam-shaped;

[0010] A clamping plate, wherein the middle portion of the clamping plate is hinged to the side of the cam roller farthest from the rotation axis, and the side of the clamping plate away from the cam roller is provided with anti-slip grooves;

[0011] A torsion spring is installed at the rotation axis of the cam roller, and the torsion spring drives the cam roller to rotate toward the side where the clamping plate is located.

[0012] Optionally, a ratchet is fixedly mounted on one end of the cam roller rotating shaft, a pawl is rotatably mounted on the mounting portion, the pawl is connected to an engagement spring, and the pawl engages the ratchet.

[0013] Optionally, one end of the two cam roller rotation shafts away from the ratchet wheel is respectively connected to a synchronous chain and a reverse gear set, and the synchronous chain is connected to the reverse gear set.

[0014] Optionally, a lever is rotatably mounted on the mounting portion near the pawl, a knob is provided on the outside of the mounting portion, and a protrusion is provided on one end of the lever near the pawl, and when the lever rotates, the protrusion lifts the pawl.

[0015] Optionally, the clamping plate includes a connecting plate, the connecting plate is mounted on the cam roller, the connecting plate is plugged with an adapter plate, the adapter plate is plugged with an anti-slip plate, and a plurality of adapter plates are provided.

[0016] Optionally, the plugging direction between the adapter plate and the anti-slip plate is perpendicular to the tensile direction of the tensile test.

[0017] Optionally, mounting holes are provided at both ends of the mounting groove, and the adapter plate and the anti-slip plate are installed through the mounting holes.

[0018] Optionally, a driving shaft is mounted on one of the cam rollers, and a hand-driven button is fixedly mounted on one end of the driving shaft away from the cam roller.

[0019] In summary, this application includes at least one of the following beneficial technical effects:

[0020] Through two cam rollers, the clamping plate part is gradually and automatically clamped when the rectangular sheet is stretched, which simplifies the use of the clamping structure, facilitates clamping, and improves installation efficiency;

[0021] By setting the ratchet and the pawl, the cam roller can only rotate in one direction when the pawl engages the ratchet. As a result, after the rectangular piece is installed between the two clamping plates, the cam roller can only rotate in the clamping direction, reducing the possibility of the rectangular piece loosening due to external force.

[0022] By setting up a synchronous chain and a reverse gear set, the two cam rollers rotate synchronously, so that the rectangular sheet is located at the center of the installation part when clamped, which facilitates the balance of tension applied by the stretching equipment and balances the extrusion force of the two cam rollers to better form clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0024] Figure 2 This is a schematic structural diagram of the mounting slot portion of an embodiment of the present application;

[0025] Figure 3 This is a schematic diagram of the structure of the synchronization chain part of an embodiment of the present application;

[0026] Figure 4 yes Figure 2 Enlarged schematic diagram of part A.

[0027] Reference numerals: 1, mounting portion; 11, connecting portion;

[0028] 2. Mounting slot; 21. Mounting rectangular hole;

[0029] 3. Cam roller; 31. Torsion spring; 32. Ratchet; 33. Pawl; 341. Synchronous chain; 342. Reverse gear set; 35. Manual drive button;

[0030] 4. Clamping plate; 401. Connecting plate; 402. Adapter plate; 403. Anti-slip plate; 41. Lever; 42. Knob. DETAILED DESCRIPTION

[0031] The present application is further described in detail below with reference to the accompanying drawings.

[0032] See also Figure 1 and Figure 2 , is a clamping structure for plate tensile testing disclosed in an embodiment of the present application, including a mounting portion 1, a connecting portion 11 is provided on one side of the mounting portion 1, a mounting groove 2 is provided on the side of the mounting portion 1 away from the connecting portion 11, and cam rollers 3 are rotatably installed on both sides of the mounting groove 2. The cross-section of the cam roller 3 is cam-shaped, and a clamping plate 4 is hinged on the side of the cam roller 3 farthest from the rotation axis. The clamping plate 4 is provided with anti-slip grooves on the side away from the cam roller 3, and a torsion spring 31 is installed at the rotation axis position of the cam roller 3, which drives the cam roller 3 to rotate toward the side where the clamping plate 4 is located.

[0033] Specifically, a cam roller 3 and a torsion spring 31 are provided. When the rectangular sheet is placed between the clamping plates 4, the torsion spring 31 drives the cam roller 3 to rotate so that the two clamping plates 4 are closed to clamp the rectangular sheet. When the rectangular sheet is stretched, the cam roller 3 rotates and continues to squeeze the clamping plates 4.

[0034] In this way, the clamping plate 4 is gradually and automatically clamped by the two cam rollers 3 when the rectangular sheet is stretched, which simplifies the use of the clamping structure, facilitates clamping, and improves installation efficiency.

[0035] In some feasible embodiments, the mounting portion 1 is a rectangular block, and the connecting portion 11 is a portion connected to the output end of a hydraulic press or other equipment. It can be provided with threaded connection, plug connection, or bolted connection according to the use requirements of the equipment. Each device is installed with two clamping structures for plate tensile testing. The mounting groove 2 is a rectangular groove. The cam roller 3 is a rotating roller with a cam-shaped cross-section. A spline hole is provided in the center of the cam roller 3. After the cam roller 3 is installed in the mounting groove 2, a spline rod passes through the mounting portion 1 to support the rotation of the cam roller 3. A torsion spring 31 is installed at the end of the spline rod.

[0036] A groove may be provided in the middle of the side of the cam roller 3 farthest from the rotating axis, and a connecting block is hinged in the groove. The connecting block is fixedly connected to the middle of the clamping plate 4 to balance the force on the clamping plate 4. A triangular anti-slip groove is provided on the side of the clamping plate 4 away from the cam roller 3 to facilitate clamping of the rectangular sheet.

[0037] As a specific embodiment of a clamping structure for plate tensile testing provided in the application, a ratchet 32 is fixedly installed on one end of the rotating shaft of the cam roller 3, and a pawl 33 is rotatably installed on the mounting part 1. The pawl 33 is connected to an engagement spring, and the pawl 33 engages the ratchet 32.

[0038] Overall, by setting The ratchet 32 and the pawl 33 ensure that the cam roller 3 can only rotate in one direction when the pawl 33 engages the ratchet 32. As a result, after the rectangular piece is installed between the two clamping plates 4, the cam roller 3 can only rotate in the clamping direction, reducing the possibility of the rectangular piece loosening due to external force.

[0039] In some feasible embodiments, rectangular placement grooves are provided at both ends of the mounting portion 1 , the ratchet 32 is fixedly connected to the end of the rotating shaft of the cam roller 3 , and the ratchet 32 and the pawl 33 are located in the placement grooves.

[0040] Further, see Figure 2 and Figure 3 The ends of the rotation axes of the two cam rollers 3 away from the ratchet 32 are respectively connected to a synchronous chain 341 and a reverse gear set 342 , and the synchronous chain 341 is connected to the reverse gear set 342 .

[0041] It should be understood that by setting the synchronous chain 341 and the reverse gear set 342, the two cam rollers 3 rotate synchronously, so that the rectangular sheet is located at the center of the mounting portion 1 when clamped, which facilitates the tension balance applied by the stretching equipment, and at the same time balances the extrusion force of the two cam rollers 3 to better form clamping.

[0042] In some feasible embodiments, the synchronization chain 341 is a sprocket chain structure, the synchronization chain 34 is installed in a placement groove of the mounting part 1 away from the ratchet 32, and a reverse gear set 342 is installed at the rotating shaft of the other cam roller 3. The cam roller 3 rotates synchronously through the synchronization chain 34 and the reverse gear set 342.

[0043] Further, see Figure 1 、 Figure 2 and Figure 4 A lever 41 is rotatably mounted on the mounting portion 1 near the pawl 33. The lever 41 is provided with a knob 42 on the outside of the mounting portion 1. A protrusion is provided on one end of the lever 41 near the pawl 33. When the lever 41 rotates, the protrusion lifts the pawl 33.

[0044] It should be understood that by providing the lever 41 , the pawl 33 can be disengaged from the ratchet 32 by rotating the knob 42 , thereby facilitating control of the partial engagement of the ratchet 32 with the pawl 33 .

[0045] In some feasible embodiments, the lever 41 and the protrusion are cam-shaped, and the lever 41 extends outward through the mounting portion 1 to connect to the knob 42. To prevent the lever 41 from rotating excessively, a rectangular baffle is fixedly installed on the lever 41 to form a blockage after the lever 41 rotates to a suitable position.

[0046] Furthermore, a driving shaft is mounted on one of the cam rollers 3 , and a manual driving button 35 is fixedly mounted on one end of the driving shaft away from the cam roller 3 .

[0047] It should be understood that by providing the manual drive button 35, the cam roller 3 can be manually rotated, which makes it easy to remove the rectangular sheet after the experiment.

[0048] Provided as an application A clamping structure for plate tensile testing Another specific embodiment of See also Figure 1 The clamping plate 4 includes a connecting plate 401, which is mounted on the cam roller 3. The connecting plate 401 is plugged with an adapter plate 402, which is plugged with an anti-slip plate 403. There are multiple adapter plates 402.

[0049] In combination with specific usage scenarios, by setting multiple adapter plates 402, the minimum spacing between the clamping plates 4 can be changed by changing the number of adapter plates 402, so that the clamping plates 4 can adapt to more rectangular sheet tensile tests of different thicknesses.

[0050] Furthermore, the plugging direction between the adapter plate 402 and the anti-slip plate 403 is perpendicular to the tensile direction of the tensile test.

[0051] It should be understood that the plugging direction of the adapter plate 402 and the anti-slip plate 403 is perpendicular to the tensile direction of the tensile test to reduce the possibility of the adapter plate 402 and the anti-slip plate 403 slipping during stretching.

[0052] In some feasible methods, the end faces of the adapter plate 402 and the anti-slip plate 403 are both provided with dovetail strips, and the corresponding positions of the adapter plate 402 and the connecting plate 401 are provided with dovetail grooves. In order to facilitate the installation of the adapter plate 402 and the anti-slip plate 403, mounting rectangular holes 21 are provided at both ends of the mounting groove 2. The setting of the mounting rectangular holes 21 can also make the clamping plate 4 suitable for tensile tests of rectangular sheets with larger widths.

[0053] The embodiments of this specific implementation method are all preferred embodiments of the present application and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A clamping structure for plate tensile testing, characterized in that: include: A mounting portion (1), wherein a connecting portion (11) is provided on one side of the mounting portion (1); A mounting groove (2), the mounting groove (2) being provided on a side of the mounting portion (1) away from the connecting portion (11); Cam rollers (3), two cam rollers (3) are rotatably mounted on both sides of the mounting groove (2), and the cross section of the cam rollers (3) is cam-shaped; A clamping plate (4), wherein the middle portion of the clamping plate (4) is hinged to the side of the cam roller (3) farthest from the rotation axis, and the side of the clamping plate (4) away from the cam roller (3) is provided with anti-slip grooves; A torsion spring (31) is installed at the rotation axis position of the cam roller (3), and the torsion spring (31) drives the cam roller (3) to rotate toward the side where the clamping plate (4) is located.

2. The clamping structure for plate tensile testing according to claim 1, characterized in that: A ratchet (32) is fixedly mounted on one end of the rotating shaft of the cam roller (3), and a pawl (33) is rotatably mounted on the mounting portion (1). The pawl (33) is connected to an engagement spring, and the pawl (33) engages with the ratchet (32).

3. The clamping structure for plate tensile testing according to claim 2, characterized in that: One end of the rotation axis of the two cam rollers (3) away from the ratchet (32) is respectively connected to a synchronous chain (341) and a reverse gear set (342), and the synchronous chain (341) is connected to the reverse gear set (342).

4. The clamping structure for plate tensile testing according to claim 3, characterized in that: A lever (41) is rotatably mounted on the mounting portion (1) near the pawl (33). The lever (41) is provided with a knob (42) outside the mounting portion (1). A protrusion is provided at one end of the lever (41) near the pawl (33). When the lever (41) rotates, the protrusion lifts the pawl (33).

5. The clamping structure for plate tensile testing according to claim 1, characterized in that: The clamping plate (4) comprises a connecting plate (401), the connecting plate (401) is mounted on the cam roller (3), the connecting plate (401) is plugged with an adapter plate (402), the adapter plate (402) is plugged with an anti-slip plate (403), and a plurality of adapter plates (402) are provided.

6. The clamping structure for plate tensile testing according to claim 5, characterized in that: The plugging direction of the adapter plate (402) and the anti-slip plate (403) is perpendicular to the tensile test tensile direction.

7. The clamping structure for plate tensile testing according to claim 5, characterized in that: Mounting holes (21) are provided at both ends of the mounting groove (2), and the adapter plate (402) and the anti-slip plate (403) are mounted through the mounting holes (21).

8. The clamping structure for plate tensile testing according to claim 3, characterized in that: A drive shaft is mounted on one of the cam rollers (3), and a hand-driven button (35) is fixedly mounted on one end of the drive shaft away from the cam roller (3).

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