Clamp holder for testing tensile force of titanium alloy bar

Abstract

The invention belongs to the technical field of solid material strength testing, and discloses a titanium alloy bar tensile force testing clamp holder which comprises a clamping mechanism and a bar, the clamping mechanism specifically comprises a fixing frame, a swing frame in threaded connection to the fixing frame and a pressing plate rotationally connected to the bottom of the swing frame, and the titanium alloy bar tensile force testing clamp holder further comprises a positioning mechanism, the positioning mechanism is arranged at one end of the fixing frame; the self-locking mechanism is arranged at the lower end of the fixing frame and used for conducting self-locking on the bars. The first buffer mechanism is arranged in the positioning mechanism and extends to the outer side of the positioning mechanism; when a bar is pulled, under the action of pulling force, the positioning box moves in the direction away from the fixing frame, the movable toothed plate drives the positioning gear to rotate, and the positioning gear drives the attaching assembly to rotate upwards to further apply pressure to the bar, so that the self-locking effect is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of solid material strength testing, in particular to a clamp for testing the tensile force of a titanium alloy bar. Background Art

[0002] There are generally two types of tensile tests for titanium alloy bars. One is a standard tensile test (need to break), which is suitable for material research and development, quality acceptance and performance comparison; the other is a non-destructive test (no breaking), which is for workpiece service performance evaluation (such as aircraft engine titanium alloy blades), residual stress detection and weld joint performance monitoring. In a standard tensile test, when the bar breaks, its own stress will be transferred to the fixture. Since the material strength of aluminum alloy bars is relatively high, the stress generated when breaking is also relatively high. This stress will cause the fixture to be subjected to a large impact, affecting the service life of the fixture. Therefore, improvements are made to the above problems. Summary of the invention

[0003] In order to solve the problems raised in the above background technology, the present invention provides a clamp for tensile force testing of titanium alloy bars.

[0004] To achieve the above object, the present invention provides the following technical solution: a clamp for testing the tensile force of a titanium alloy bar, comprising a clamping mechanism and a bar, wherein the clamping mechanism specifically comprises a fixed frame, a rotating frame threadedly connected to the fixed frame, and a pressing plate rotatably connected to the bottom of the rotating frame, and further comprising:

[0005] A positioning mechanism, wherein the positioning mechanism is arranged at one end of the fixing frame;

[0006] A self-locking mechanism, which is disposed at the lower end of the fixing frame and is used to self-lock the rod;

[0007] A first buffer mechanism, which is disposed inside the positioning mechanism and extends to the outside of the positioning mechanism;

[0008] The second buffer mechanism is arranged at one end of the positioning mechanism and extends to the inside of the fixing frame. The second buffer mechanism cooperates with the first buffer mechanism to buffer the stress of the rod.

[0009] Preferably, the positioning mechanism comprises a positioning box, a closing cover is installed on the top of the positioning box, a water storage bin is provided inside the positioning box, and the positioning box is slidably connected to the fixing frame.

[0010] Preferably, a through slot is opened inside the fixing frame, the rod is located in the slot, and the slots are respectively a first bin, a second bin and a third bin from top to bottom, and the three are connected.

[0011] Preferably, the self-locking mechanism includes a fitting component, a positioning gear and a movable tooth plate, the fitting component is rotatably connected to the third chamber body, the fitting component is fixedly connected to the positioning gear through a connecting shaft, the positioning gear is rotatably connected to the inside of the fixed frame through the connecting shaft, the movable tooth plate is meshed with the positioning gear, the positioning gear is fixedly installed on one side of the positioning box and is slidably connected to the fixed frame, and the fitting component is inclined.

[0012] Preferably, the fitting assembly includes a positioning frame, a movable column and a pressure plate, the positioning frame is fixedly connected to the connecting shaft, the movable column is slidably connected to one end of the positioning frame, the pressure plate ball shaft is connected to one end of the movable column located outside the positioning frame, and a cavity is provided inside the positioning frame and the cavity is filled with hydraulic oil.

[0013] Preferably, the first buffer mechanism includes a movable rod, a rubber gasket and a movable plate, the movable rod is connected to the positioning box piston, the rubber gasket and the movable plate are respectively installed at both ends of the movable rod, the movable plate is located inside the water storage bin and connected to the water storage bin piston, and the movable plate inside the water storage bin is filled with water at one end away from the movable rod.

[0014] Preferably, the second buffer mechanism includes a high-pressure connecting pipe, a connecting branch pipe, a connecting bin and a drain pipe, one end of the high-pressure connecting pipe is connected to the water storage bin, and the other end extends to the inside of the fixed frame, the high-pressure connecting pipe is connected to the connecting branch pipe, the connecting bin is connected to the connecting branch pipe, and the drain pipe is installed on the top of the connecting bin.

[0015] Preferably, there are three drainage pipes on the top of one connecting bin and they are evenly distributed, the three drainage pipes have different directions, and the drainage pipes are fixedly installed on the side wall of the third bin body.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. When the rod is pulled, the positioning box moves away from the fixed frame under the action of the pulling force, and drives the positioning gear to rotate through the movable tooth plate. The positioning gear drives the fitting component to rotate upward to further apply pressure to the rod, thereby achieving a self-locking effect.

[0018] 2. In the present invention, the movable column is adaptively adjusted under pressure when it contacts the rod, so as to fit the rod more closely, and the movable column located in the middle area contacts the rod first, and moves toward the inside of the positioning frame under pressure, while the movable columns on both sides move toward the outside of the positioning frame, thereby also fitting the bottom of the rod, ensuring a larger contact surface and improving the fixing effect.

[0019] 3. In the present invention, when the rod is broken, under its reaction force, the rod moves with the clamping mechanism as a whole toward the direction close to the positioning mechanism, and the positioning gear rotates in the opposite direction to reduce the extrusion force of the pressure plate on the rod. The movement of the rod can drive the movable rod and the movable plate to move the water inside the water storage tank to be sprayed obliquely onto the rod through the second buffer mechanism. On the one hand, in order to form a water film between the rod and the clamping mechanism to reduce the friction between the rod and the clamping mechanism, so that the distance between the fixed frame and the positioning box remains unchanged, the rod can continue to move toward the positioning box. On the other hand, it can cool the metal to prevent metal fatigue caused by friction. On the other hand, it can achieve a certain deceleration effect by using the water flow in the opposite direction of the movement of the rod. At this time, as the fixed frame moves toward the positioning box, the pressure plate rotates in the opposite direction and contacts and squeezes the rod, reducing the moving speed of the rod through friction, and finally achieving buffering of the reaction force. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 It is a structural subdivision diagram of the clamping mechanism of the present invention;

[0022] Figure 3 It is a structural cross-sectional view of the positioning box and the fixing frame of the present invention;

[0023] Figure 4 is another cross-sectional view of the fixing frame of the present invention;

[0024] Figure 5 It is a structural breakdown diagram of the self-locking mechanism of the present invention;

[0025] Figure 6 For the present invention Figure 5 The structural cross-sectional view of A in the middle;

[0026] Figure 7 It is a structural breakdown diagram of the laminating component of the present invention;

[0027] Figure 8 It is a schematic diagram of the movement direction of the bonding component during stretching of the present invention.

[0028] In the figure: 1. positioning mechanism; 101. positioning box; 102. closing cover; 103. water storage bin; 104. guide roller; 2. clamping mechanism; 201. fixed frame; 202. rotating frame; 203. pressure plate; 21. first bin body; 22. second bin body; 23. third bin body; 3. self-locking mechanism; 301. fitting assembly; 3011. positioning frame; 3012. movable column; 3013. pressure plate; 302. positioning gear; 303. movable tooth plate; 4. first buffer mechanism; 401. movable rod; 402. rubber gasket; 403. movable plate; 5. second buffer mechanism; 501. high-pressure connecting pipe; 502. connecting branch pipe; 503. connecting bin; 504. drainage pipe; 6. rod. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 8 As shown, the present invention provides a clamp for tensile force testing of titanium alloy bars, comprising a clamping mechanism 2 and a bar 6, wherein the clamping mechanism 2 specifically comprises a fixed frame 201, a rotating frame 202 threadedly connected to the fixed frame 201, and a pressing plate 203 rotatably connected to the bottom of the rotating frame 202, and further comprising:

[0031] Positioning mechanism 1, which is disposed at one end of the fixing frame 201;

[0032] A self-locking mechanism 3, which is disposed at the lower end of the fixing frame 201 and is used to self-lock the rod 6;

[0033] A first buffer mechanism 4, which is disposed inside the positioning mechanism 1 and extends to the outside of the positioning mechanism 1;

[0034] The second buffer mechanism 5 is arranged at one end of the positioning mechanism 1 and extends to the inside of the fixing frame 201 . The second buffer mechanism 5 cooperates with the first buffer mechanism 4 to buffer the stress of the rod 6 .

[0035] The above scheme is adopted: the device is arranged at both ends of the rod 6, one of the positioning boxes 101 is fixed on the detection platform, and the other positioning box 101 is connected to the hydraulic cylinder for stretching the rod 6; the rod 6 is clamped and fixed by the fixed frame 201, the rotating frame 202 and the pressure plate 203, and the rod 6 is attached to the two side walls of the second warehouse body 22, and the pressure plate 203 located above the rod 6 moves down to apply pressure to the rod 6; the self-locking mechanism 3 located inside the third warehouse body 23 is inclined and attached to the bottom of the rod 6. When the rod 6 is stretched, the hydraulic cylinder drives the corresponding positioning box 101 to move. Under the action of the pulling force, the positioning box 101 moves away from the fixed frame 201, and drives the positioning gear 302 to rotate through the movable tooth plate 303. The positioning gear 302 drives the fitting component 301 to rotate upward to further apply pressure to the rod 6, thereby achieving a self-locking effect.

[0036] like Figure 3 As shown, the positioning mechanism 1 includes a positioning box 101 , a closing cover 102 is installed on the top of the positioning box 101 , a water storage bin 103 is provided inside the positioning box 101 , and the positioning box 101 is slidably connected to the fixing frame 201 via 104 .

[0037] With the above solution, the water storage bin 103 can be filled with water and the water storage bin 103 can be closed by the provided closing cover 102, and the positioning box 101 can be guided to move so as to ensure stability during movement.

[0038] like Figure 1 and Figure 2 As shown, a through slot is provided inside the fixing frame 201, and the rod 6 is located inside the slot. The slots are respectively a first bin 21, a second bin 22 and a third bin 23 from top to bottom, and the three are connected.

[0039] The above solution is adopted: the first bin body 21, the second bin body 22 and the third bin body 23 cooperate with each other, and the rod 6 is placed inside the three bin bodies, which can adapt to rods 6 of different sizes and has a wide range of applications.

[0040] like Figures 3 to 5 As shown, the self-locking mechanism 3 includes a fitting component 301, a positioning gear 302 and a movable tooth plate 303. The fitting component 301 is rotatably connected to the third warehouse body 23. The fitting component 301 is fixedly connected to the positioning gear 302 via a connecting shaft. The positioning gear 302 is rotatably connected to the inside of the fixed frame 201 via the connecting shaft. The movable tooth plate 303 is meshed with the positioning gear 302. The positioning gear 302 is fixedly installed on one side of the positioning box 101 and is slidably connected to the fixed frame 201. The fitting component 301 is inclined.

[0041] The above scheme is adopted: the movable tooth plate 303 moves synchronously when the positioning box 101 is pulled. Since the clamping mechanism 2 clamps the rod 6, the fitting component 301 and the positioning gear 302 installed inside the third warehouse body 23 are stationary inside the fixed frame 201. The movement of the movable tooth plate 303 can drive the positioning gear 302 to rotate, thereby driving the fitting component 301 to flip upward, and then exerting a greater extrusion pressure on the rod 6, thereby ensuring the fixing effect of the rod 6 in the experiment.

[0042] like Figure 7 As shown, the fitting component 301 includes a positioning frame 3011, a movable column 3012 and a pressure plate 3013. The positioning frame 3011 is fixedly connected to the connecting shaft, the movable column 3012 is slidably connected to one end of the positioning frame 3011, the pressure plate 3013 is ball-axled connected to one end of the movable column 3012 located outside the positioning frame 3011, and a cavity is provided inside the positioning frame 3011 and the cavity is filled with hydraulic oil.

[0043] The above scheme is adopted: the pressure plate 3013 is connected to the ball shaft of the movable column 3012, so that the movable column 3012 is adaptively adjusted under the pressure when it contacts the rod 6, and fits the rod 6 more closely. Since the rod 6 is columnar, the movable column 3012 slides inside the positioning frame 3011. When the self-locking mechanism 3 is flipped upward as a whole, the movable column 3012 located in the middle area first contacts the rod 6 and moves toward the inside of the positioning frame 3011 under the action of pressure, while the movable columns 3012 on both sides move toward the outside of the positioning frame 3011, thereby also fitting the bottom of the rod 6, ensuring a larger contact surface and improving the fixing effect. The shapes of the pressure plate 3013 and the pressure plate 203 can be adaptively adjusted.

[0044] like Figure 3 As shown, the first buffer mechanism 4 includes a movable rod 401, a rubber gasket 402 and a movable plate 403. The movable rod 401 is connected to the piston of the positioning box 101. The rubber gasket 402 and the movable plate 403 are respectively installed at both ends of the movable rod 401. The movable plate 403 is located inside the water storage tank 103 and connected to the piston of the water storage tank 103. The movable plate 403 inside the water storage tank 103 is filled with water at one end away from the movable rod 401.

[0045] The above scheme is adopted: when the rod 6 is broken, under its reaction force, the rod 6 moves with the clamping mechanism 2 as a whole towards the direction close to the positioning mechanism 1. At this time, the positioning gear 302 rotates in the opposite direction under the action of the movable tooth plate 303, and the pressing force of the pressure plate 3013 on the rod 6 is reduced. Under the action of inertia, the rod 6 contacts and squeezes the rubber gasket 402, and then drives the movable rod 401 and the movable plate 403 to move inside the positioning box 101, so that the water inside the water storage tank 103 is sprayed obliquely onto the rod 6 through the second buffer mechanism 5. On the one hand, in order to make the rod 6 and the clamping mechanism 2 A water film is formed between the rod 6 and the clamping mechanism 2 to reduce the friction between the rod 6 and the clamping mechanism 2, so that the rod 6 can continue to move toward the positioning box 101 after the distance between the fixed frame 201 and the positioning box 101 remains unchanged. On the other hand, the metal can be cooled to prevent metal fatigue caused by friction. On the other hand, the water flow in the opposite direction of the movement of the rod 6 has a certain deceleration effect. At this time, as the fixed frame 201 moves toward the positioning box 101, the pressure plate 3013 rotates in the opposite direction and contacts and squeezes the rod 6, reducing the movement speed of the rod 6 through friction, and finally achieving buffering of the reaction force.

[0046] like Figure 5 and Figure 6 As shown, the second buffer mechanism 5 includes a high-pressure connecting pipe 501, a connecting branch pipe 502, a connecting bin 503 and a drain pipe 504. One end of the high-pressure connecting pipe 501 is connected to the water storage bin 103, and the other end extends to the inside of the fixed frame 201. The high-pressure connecting pipe 501 is connected to the connecting branch pipe 502, and the connecting bin 503 is connected to the connecting branch pipe 502. The drain pipe 504 is installed on the top of the connecting bin 503. There are three drain pipes 504 on the top of a connecting bin 503 and they are evenly distributed. The three drain pipes 504 have different directions, and the drain pipe 504 is fixedly installed on the side wall of the third bin body 23.

[0047] By adopting the above solution, the directions of the three drainage pipes 504 are all different, so that the water flow can be evenly sprayed between the rod 6 and the fixing frame 201, thereby ensuring the reduction of friction and allowing the rod 6 to slide inside the fixing frame 201.

[0048] The working principle and use process of the present invention:

[0049] When in use, firstly, both ends of the rod 6 are placed inside the two fixing frames 201 located on both sides, and the rotating frame 202 is rotated to move it downward to fix the rod 6 by the pressure plate 203. At this time, the rod 6 is attached to the two side walls of the second warehouse body 22, and the pressure plate 203 located above the rod 6 moves downward to apply pressure to the rod 6, and the hydraulic cylinder connected to one side of one of the positioning boxes 101 is started to drive the positioning box 101 fixed thereon to move and pull the rod 6;

[0050] During the pulling process, the positioning box 101 moves away from the fixing frame 201, and drives the positioning gear 302 to rotate through the movable tooth plate 303. The positioning gear 302 drives the fitting component 301 to rotate upward to further apply pressure to the rod 6. When the movable column 3012 contacts the rod 6, it is adaptively adjusted under the pressure to fit the rod 6 more closely. The movable column 3012 located in the middle area first contacts the rod 6 and moves toward the inside of the positioning frame 3011 under the pressure, while the movable columns 3012 on both sides move toward the outside of the positioning frame 3011, thereby also fitting the bottom of the rod 6, ensuring a larger contact surface, improving the fixing effect, and achieving a self-locking effect, thereby ensuring the fixing effect of the rod 6 in the experiment.

[0051] When the rod 6 is broken, under its reaction force, the rod 6 moves with the clamping mechanism 2 as a whole towards the direction close to the positioning mechanism 1. At this time, the positioning gear 302 rotates in the opposite direction under the action of the movable tooth plate 303, and the pressing force of the pressure plate 3013 on the rod 6 is reduced. Under the action of inertia, the rod 6 contacts and squeezes the rubber gasket 402, and after it is deformed, it drives the movable rod 401 and the movable plate 403 to move into the positioning box 101, so that the water in the water storage tank 103 is sprayed obliquely onto the rod 6 through the second buffer mechanism 5. On the one hand, in order to form a gap between the rod 6 and the clamping mechanism 2 The water film reduces the friction between the rod 6 and the clamping mechanism 2, so that the rod 6 can continue to move toward the positioning box 101 after the distance between the fixed frame 201 and the positioning box 101 remains unchanged. On the other hand, it can cool the metal to prevent metal fatigue caused by friction. On the other hand, the water flow in the opposite direction of the movement of the rod 6 has a certain deceleration effect. At this time, as the fixed frame 201 moves toward the positioning box 101, the pressure plate 3013 rotates in the opposite direction and contacts and squeezes the rod 6, reducing the movement speed of the rod 6 through friction, and finally achieving buffering of the reaction force.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A clamp for testing the tensile force of a titanium alloy bar, comprising a clamping mechanism (2) and a bar (6), wherein the clamping mechanism (2) specifically comprises a fixed frame (201), a rotating frame (202) threadedly connected to the fixed frame (201), and a pressing plate (203) rotatably connected to the bottom of the rotating frame (202), characterized in that: Also includes, A positioning mechanism (1), wherein the positioning mechanism (1) is arranged at one end of the fixing frame (201); A self-locking mechanism (3), the self-locking mechanism (3) being arranged at the lower end of the fixing frame (201) and being used for self-locking the rod (6); A first buffer mechanism (4), the first buffer mechanism (4) being arranged inside the positioning mechanism (1) and extending to the outside of the positioning mechanism (1); A second buffer mechanism (5), the second buffer mechanism (5) is arranged at one end of the positioning mechanism (1) and extends into the interior of the fixing frame (201), the second buffer mechanism (5) cooperates with the first buffer mechanism (4) to achieve stress buffering of the rod (6).

2. The titanium alloy bar tensile force test holder according to claim 1, characterized in that: The positioning mechanism (1) comprises a positioning box (101), a closing cover (102) is installed on the top of the positioning box (101), a water storage bin (103) is provided inside the positioning box (101), and the positioning box (101) is slidably connected to a fixing frame (201) via (104).

3. The titanium alloy bar tensile force test holder according to claim 1, characterized in that: A through slot is provided inside the fixing frame (201), the rod (6) is located inside the slot, and the slots are respectively a first bin (21), a second bin (22) and a third bin (23) from top to bottom, and the three are connected.

4. The titanium alloy bar tensile force test holder according to claim 1, characterized in that: The self-locking mechanism (3) comprises a fitting component (301), a positioning gear (302) and a movable tooth plate (303); the fitting component (301) is rotatably connected to the inside of the third bin body (23); the fitting component (301) is fixedly connected to the positioning gear (302) via a connecting shaft; the positioning gear (302) is rotatably connected to the inside of the fixing frame (201) via the connecting shaft; the movable tooth plate (303) is meshed with the positioning gear (302); the positioning gear (302) is fixedly mounted on one side of the positioning box (101) and is slidably connected to the fixing frame (201); and the fitting component (301) is inclined.

5. The titanium alloy bar tensile force test holder according to claim 4, characterized in that: The fitting component (301) comprises a positioning frame (3011), a movable column (3012) and a pressure plate (3013); the positioning frame (3011) is fixedly connected to a connecting shaft; the movable column (3012) is slidably connected to one end of the positioning frame (3011); the pressure plate (3013) is ball-axled and connected to one end of the movable column (3012) located outside the positioning frame (3011); a cavity is provided inside the positioning frame (3011) and is filled with hydraulic oil.

6. The titanium alloy bar tensile force test holder according to claim 2, characterized in that: The first buffer mechanism (4) comprises a movable rod (401), a rubber gasket (402) and a movable plate (403); the movable rod (401) is connected to the piston of the positioning box (101); the rubber gasket (402) and the movable plate (403) are respectively mounted at two ends of the movable rod (401); the movable plate (403) is located inside the water storage bin (103) and connected to the piston of the water storage bin (103); and the end of the movable plate (403) inside the water storage bin (103) away from the movable rod (401) is filled with water.

7. The titanium alloy bar tensile force test holder according to claim 2, characterized in that: The second buffer mechanism (5) comprises a high-pressure connecting pipe (501), a connecting branch pipe (502), a connecting bin (503) and a drain pipe (504); one end of the high-pressure connecting pipe (501) is connected to the water storage bin (103), and the other end extends to the interior of the fixing frame (201); the high-pressure connecting pipe (501) is connected to the connecting branch pipe (502); the connecting bin (503) is connected to the connecting branch pipe (502); and the drain pipe (504) is installed on the top of the connecting bin (503).

8. The titanium alloy bar tensile force test holder according to claim 7, characterized in that: There are three drainage pipes (504) on the top of one of the connection bins (503) and they are evenly spaced. The three drainage pipes (504) have different orientations. The drainage pipes (504) are fixedly mounted on the side wall of the third bin body (23).

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