A lifting hammer test machine

Abstract

The present application relates to a kind of hammer test technical field, specifically related to a kind of lifting hammer test machine.It includes base, the both sides of base are fixed with drive frame, three supporting plates are arranged between two drive frames, supporting plate is parallel with horizontal plane, two drive frames can drive three supporting plates simultaneously along closed loop rectangular track movement, supporting plate keeps horizontal state when moving, clamping assembly is arranged on the upper end of supporting plate, the upper end of two drive frames is fixedly connected with support plate, vertical rod is movably arranged in the vertical direction of support plate, the lower end of vertical rod is fixed with hammer, hammer lower end is in close contact with the upper end of the uppermost supporting plate, the lowermost supporting plate is located directly below hammer, the middle supporting plate is set in staggered with hammer.By vertical rod helical groove and slide rod linkage design, after hammer impact test sample, hammer is rotated using mechanical transmission in the lifting process of supporting plate, in combination with the lower end of hammer friction pattern, the continuous loading of impact, rotary friction and horizontal friction is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hammer test, in particular to a lifting type hammer test machine. BACKGROUND

[0002] In the field of material mechanical property testing, hammer test is an important means to evaluate the impact resistance, wear resistance and structural stability of plates. Traditional hammer test devices mostly adopt single vertical impact mode, and impact load is applied to the sample by a fixed height hammer. However, in actual engineering applications, materials often bear multi-directional and composite dynamic loads, such as complex working conditions of post-impact rotary friction and horizontal sliding friction. The existing test equipment is usually difficult to simulate such comprehensive stress scenarios, resulting in deviation between test results and real working conditions, and the durability of materials cannot be fully evaluated.

[0003] In addition, the conventional hammer test machine often faces the problem of low efficiency in the test process. For example, only a single sample impact operation can be completed in a single test, and manual intervention is required to replace the sample or adjust the test mode, which lacks automation. Some devices try to improve efficiency through multi-station design, but the coordination between multi-stations is poor, and there is a lack of precise control over the dynamic loading process of the sample, making it difficult to realize the continuous triggering of multiple steps such as impact, friction, etc.

[0004] In view of the above problems, there is an urgent need for a test device that can integrate impact, rotary friction and horizontal friction functions and has multi-station collaborative operation capability. SUMMARY

[0005] The main purpose of the present application is to provide a lifting type hammer test machine which can sequentially perform impact, rotary friction and horizontal friction on the plate to be tested.

[0006] In order to achieve the above purpose, the technical scheme provided by the present application is:

[0007] The utility model provides a lifting type hammering testing machine, including the base, both sides of base are fixed with drive frame, be provided with three supporting plates between two drive frames, supporting plate is parallel with horizontal plane, two drive frames can drive three supporting plates move along closed loop rectangular track simultaneously, supporting plate keeps horizontal state when moving, the upper end of supporting plate is provided with clamping assembly, the upper end of two drive frames is fixedly connected with support plate, the vertical direction of support plate is movably provided with vertical rod, the lower end of vertical rod is fixed with the ram, the lower end of ram is close to the upper end of the uppermost supporting plate, the ram is blocked by the uppermost supporting plate, the lowermost supporting plate is located the ram directly below, the middle supporting plate is misaligned with the ram, when three supporting plates start moving along rectangular track, the uppermost supporting plate is away from the ram in horizontal direction, the lowermost supporting plate goes up, the middle supporting plate goes down, one drive frame is provided with the sliding slot, the vertical plate is elastically slidably arranged in the sliding slot, the vertical plate protrudes to the outside of the sliding slot on one side, the vertical plate is located on the upper side of the lowermost supporting plate, the outer edge of vertical rod is provided with helical groove, the guide groove is formed in the support plate, the sliding rod is elastically slidably arranged in the guide groove, the sliding rod is connected with the vertical plate through the drawstring, the lowermost supporting plate can drive the vertical plate to move into the sliding slot during the process of going up, the drawstring is relaxed after the vertical plate moves into the sliding slot, and the sliding rod can be inserted into the helical groove.

[0008] Specifically, the two drive frames are staggered in the horizontal direction, the drive frame includes a fixed frame fixedly connected with the base, four sprockets are rotatably connected to the four corners of the fixed frame, the four sprockets on the fixed frame are drivingly connected by a chain, a motor is fixedly arranged on the fixed frame, and the output shaft of the motor is fixedly connected with any one of the sprockets in a concentric manner. The two sides of the supporting plate are fixedly provided with shafts, and the shafts on the two sides of the supporting plate are staggered. The shafts are rotatably connected with the chain on one side.

[0009] Specifically, the clamping assembly includes two electric control sliding rails fixed on the supporting plate, and the two electric control sliding rails are oppositely arranged. The sliding part of the electric control sliding rail is fixedly provided with a clamping plate.

[0010] Specifically, the sliding rod and the groove wall of the guide groove are connected by a first spring, and the vertical plate and the groove wall of the sliding slot are connected by a second spring. The stiffness coefficient of the second spring is greater than the stiffness coefficient of the first spring.

[0011] Specifically, a guide inclined surface is formed at the lower end of the vertical plate. During the process of going up of the lowermost supporting plate, the vertical plate can be driven to move into the sliding slot through the guide inclined surface.

[0012] Specifically, a friction pattern is formed on the lower end surface of the ram.

[0013] Specifically, one end of the sliding rod towards the vertical rod is a circular arc end.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] 1. Through the vertical rod helical groove and slide rod linkage design, after the hammer hits the sample, the hammer is driven to rotate by mechanical transmission in the lifting process of the supporting plate, combined with the friction pattern at the lower end of the hammer, the continuous loading of impact, rotary friction and horizontal friction is realized. The comprehensive effect of vertical impact load, shear force generated by rotary friction and horizontal sliding friction is closer to the complex stress state of materials in actual engineering, which significantly improves the authenticity and comprehensiveness of the test.

[0016] 2. Three supporting plates move synchronously along a rectangular trajectory, forming a dynamic cycle of impact position, preparation position and reset position, realizing automatic switching and continuous testing of the sample, and multiple samples can be completed by a single run. The falling, rotation and reset timing of the hammer are accurately controlled during the movement of the supporting plate, avoiding mechanical interference and ensuring seamless connection of impact and friction actions.

[0017] 3. The staggered drive frame and chain shaft connection mode ensures the synchronization of the three supporting plates in the rectangular trajectory movement, eliminating the jamming problem caused by movement deviation.

[0018] 4. The electric control slide rail and clamping plate integrated on the supporting plate can automatically adjust the clamping distance according to the sample size, ensuring firm fixation and avoiding damage to the sample surface caused by manual operation.

[0019] 5. The guide slope design at the lower end of the vertical plate makes the supporting plate gently push the vertical plate back into the sliding groove during the upward movement, reducing mechanical impact and prolonging the service life of the device.

[0020] 6. When the circular arc end of the slide rod cooperates with the helical groove, the contact area is maximized, reducing wear and ensuring the continuity of rotary transmission, avoiding test data distortion caused by jamming. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic diagram of the present application.

[0022] Figure 2 is a position relationship diagram of the three supporting plates in the initial state of the present application.

[0023] Figure 3 is a schematic diagram of the uppermost supporting plate blocking the hammer in the initial state.

[0024] Figure 4 is a schematic diagram of the supporting plate.

[0025] Figure 5 is a schematic diagram of the slide rod in the guide groove.

[0026] Figure 6 is a schematic diagram of the vertical plate in the sliding groove.

[0027] The components in the attached diagram are named as follows: 1. Base; 2. Fixing frame; 3. Pull rope; 4. Sprocket; 5. Chain; 6. Support plate; 7. Shaft; 8. Electrically controlled slide rail; 9. Clamping plate; 10. Hammer; 11. Vertical rod; 12. Spiral groove; 13. Support plate; 14. Guide groove; 15. Slide rod; 16. First spring; 17. Slide groove; 18. Vertical plate; 19. Guide slope; 20. Second spring. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] like Figures 1-6 As shown, a lifting hammer impact testing machine includes a base 1, with drive frames fixed on both sides of the base 1. Three support plates 6 are arranged between the two drive frames. The support plates 6 are parallel to the horizontal plane. The two drive frames can drive the three support plates 6 to move simultaneously along a closed-loop rectangular trajectory. The support plates 6 remain horizontal when moving.

[0030] Two drive frames are staggered in the horizontal direction. The drive frame includes a fixed frame 2, which is fixedly connected to the base 1. Each of the four corners of the fixed frame 2 is rotatably connected to a sprocket 4. The four sprockets 4 on the fixed frame 2 are connected by a chain 5. A motor is fixed on the fixed frame 2. The output shaft of the motor is concentrically fixedly connected to any one of the sprockets 4. A rotating shaft 7 is fixed on both sides of the support plate 6. The rotating shafts 7 on both sides of the support plate 6 are staggered and rotatably connected to the chain 5 on one side of the rotating shaft 7.

[0031] A clamping assembly is provided at the upper end of the tray 6.

[0032] The clamping assembly includes two electrically controlled slide rails 8 fixed on the tray 6. The two electrically controlled slide rails 8 are arranged opposite to each other, and a clamping plate 9 is fixed on the sliding part of the electrically controlled slide rails 8.

[0033] The upper ends of the two drive frames are fixedly connected to the support plate 13. A vertical rod 11 is movably arranged in the vertical direction of the support plate 13. A hammer 10 is fixed to the lower end of the vertical rod 11. Friction texture is machined on the lower end surface of the hammer 10. The lower end of the hammer 10 is close to the upper end of the uppermost support plate 6, and the hammer 10 is blocked by the uppermost support plate 6. The lowermost support plate 6 is located directly below the hammer 10, and the middle support plate 6 is offset from the hammer 10.

[0034] When the three pallets 6 begin to move along the rectangular trajectory, the uppermost pallet 6 moves away from the hammer 10 in the horizontal direction, the lowermost pallet 6 moves upward, and the middle pallet 6 moves downward.

[0035] One of the driving frames is provided with a sliding groove 17, and an upright plate 18 is elastically and slidably arranged in the sliding groove 17, and the one side of the upright plate 18 protrudes out of the sliding groove 17, and the upright plate 18 is located on the upper side of the lowermost supporting plate 6.

[0036] A spiral groove 12 is formed on the outer edge of the vertical rod 11, a guide groove 14 is formed in the supporting plate 13, a sliding rod 15 is elastically and slidably arranged in the guide groove 14, and the end of the sliding rod 15 towards the vertical rod 11 is a circular arc end. The sliding rod 15 is connected with the upright plate 18 through the pull rope 3, and the lowermost supporting plate 6 can drive the upright plate 18 to move into the sliding groove 17 during the upward movement of the lowermost supporting plate 6. After the upright plate 18 moves into the sliding groove 17, the pull rope 3 is relaxed, and the sliding rod 15 can be inserted into the spiral groove 12.

[0037] The sliding rod 15 and the groove wall of the guide groove 14 are connected through the first spring 16, the upright plate 18 and the groove wall of the sliding groove 17 are connected through the second spring 20, and the stiffness coefficient of the second spring 20 is greater than the stiffness coefficient of the first spring 16.

[0038] A guide inclined surface 19 is formed on the lower end of the upright plate 18, and the lowermost supporting plate 6 can drive the upright plate 18 to move into the sliding groove 17 during the upward movement of the lowermost supporting plate 6.

[0039] In order to facilitate the description, the uppermost supporting plate 6 is named as the first flat plate, the supporting plate 6 at the middle position is named as the second flat plate, and the lowermost supporting plate 6 is named as the third flat plate.

[0040] The three plate materials to be tested are respectively placed on the upper end of the first flat plate, the upper end of the second flat plate and the upper end of the third flat plate, and the plate materials to be tested are clamped and fixed by using the clamping assembly.

[0041] As shown in FIG. 1, in the initial state, the hammer 10 is blocked by the upper end of the first flat plate, and the third flat plate is located directly below the hammer 10. Figure 3

[0042] At the same time, the motors on the two fixed frames 2 are started, the two chains 5 are synchronously rotated, the first flat plate, the second flat plate and the third flat plate move along the closed loop rectangular trajectory, the first flat plate moves away from the hammer 10 in the horizontal direction, the second flat plate moves downward, and the third flat plate moves upward. Since the stiffness coefficient of the second spring 20 is greater than the stiffness coefficient of the first spring 16, the upright plate 18 partially protrudes to the outside of the sliding groove 17, the sliding rod 15 is located in the guide groove 14 as a whole, and the pull rope 3 is pulled tight.

[0043] After the first flat plate is separated from the hammer 10, the first flat plate loses the blocking effect on the hammer 10, and the hammer 10 drives the vertical rod 11 to move downward under the action of gravity. During the downward movement of the hammer 10 and the vertical rod 11, the hammer 10 hits the plate material on the third flat plate, that is, the third flat plate and the plate material thereon are hit by the hammer 10 during the upward movement of the third flat plate and the plate material thereon. When the hammer 10 hits the plate material on the third flat plate, the third flat plate is located below the upright plate 18.

[0044] ​After the hammer 10 strikes the plate on the third plate, it is lifted as the third plate and the plate on it move upwards. When the third plate contacts the guide slope 19 at the lower end of the vertical plate 18, the vertical plate 18 moves into the slide groove 17 and compresses the second spring 20 during the subsequent upward movement of the third plate. After the vertical plate 18 moves into the slide groove 17, the pull rope 3 loosens, and under the elastic force of the first spring 16, the slide rod 15 moves towards the vertical rod 11. When the arc end of the slide rod 15 enters the spiral groove 12, the vertical rod 11 can drive the hammer 10 to rotate during the lifting process of the hammer 10 and the vertical rod 11 by the third plate and the plate on it. The rotating hammer 10 rotates and rubs against the plate on the third plate through the friction groove at its lower end.

[0045] After the third plate and the plate on it reach the top dead center, they move horizontally. When the third plate separates from the vertical plate 18, the second spring 20 causes the vertical plate 18 to return to its original position. The vertical plate 18 then pulls the sliding rod 15 away from the vertical rod 11 via the pull rope 3, and the arc-shaped end of the sliding rod 15 exits from the spiral groove 12. In the initial stage of the horizontal movement of the third plate and the plate on it, the friction grooves at the lower end of the hammer 10 rub horizontally against the plate on the third plate.

[0046] When the third plate moves to the initial position of the first plate, the hammer 10 separates from the plate on the third plate and is blocked by the upper end of the third plate. At this time, the second plate moves to the initial position of the third plate. During the subsequent movement of the first, second, and third plates, the hammer 10 can sequentially impact, rotate, and horizontally rub the plate on the second plate.

[0047] During the movement of the first, second, and third plates along a closed-loop rectangular trajectory, the impact hammer 10 can sequentially impact, rotate, and horizontally rub the plates on the third plate, the second plate, and the first plate, thereby simulating the impact and friction conditions of the plates during use.

[0048] After the hammer 10 impacts and rubs the plate a set number of times, the performance of the plate is determined based on the degree of damage to the plate.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lifting hammer impact testing machine, comprising a base (1), wherein drive frames are fixed on both sides of the base (1), characterized in that, Three support plates (6) are arranged between the two drive frames. The support plates (6) are parallel to the horizontal plane. The two drive frames can drive the three support plates (6) to move simultaneously along a closed-loop rectangular trajectory. The support plates (6) remain horizontal during movement. A clamping assembly is provided on the upper end of the support plates (6). The upper ends of the two drive frames are fixedly connected to the support plate (13). A vertical rod (11) is movably arranged on the support plate (13) in the vertical direction. A hammer (10) is fixed at the lower end of the vertical rod (11). The lower end of the hammer (10) is close to the upper end of the uppermost support plate (6). The hammer (10) is blocked by the uppermost support plate (6), the lowermost support plate (6) is located directly below the hammer (10), and the middle support plate (6) is offset from the hammer (10). When the three support plates (6) start to move along the rectangular trajectory, the uppermost support plate (6) moves away from the hammer (10) in the horizontal direction, the lowermost support plate (6) moves upward, and the middle support plate (6) moves downward. A groove (17) is provided on one of the drive frames, and a vertical plate (18) is elastically slidably arranged in the groove (17). One side of the vertical plate (18) protrudes. Outside the chute (17), the upright plate (18) is located on the upper side of the lowest support plate (6). The outer edge of the vertical rod (11) is provided with a spiral groove (12), and the support plate (13) is provided with a guide groove (14). A sliding rod (15) is elastically slidably installed in the guide groove (14). The sliding rod (15) is connected to the upright plate (18) by a pull rope (3). During the upward movement of the lowest support plate (6), it can drive the upright plate (18) to move into the chute (17). After the upright plate (18) moves into the chute (17), the pull rope (3) is relaxed, and the sliding rod (15)... 5) It can be inserted into the spiral groove (12); the end of the slide rod (15) facing the vertical rod (11) is an arc end; the lower end surface of the hammer (10) is machined with friction texture; when the arc end of the slide rod (15) enters the spiral groove (12), the lowermost support plate (6) and the plate on it lift the hammer (10) and the vertical rod (11). The vertical rod (11) can drive the hammer (10) to rotate, and the rotating hammer (10) rotates and rubs the plate on the lowermost support plate (6) through the friction texture at its lower end.

2. The lifting hammer impact testing machine according to claim 1, characterized in that, The two drive frames are staggered in the horizontal direction. The drive frame includes a fixed frame (2), which is fixedly connected to the base (1). Sprockets (4) are rotatably connected to the four corners of the fixed frame (2). The four sprockets (4) on the fixed frame (2) are connected by a chain (5). A motor is fixed on the fixed frame (2). The output shaft of the motor is concentrically fixedly connected to any one of the sprockets (4). A rotating shaft (7) is fixed on both sides of the tray (6). The rotating shafts (7) on both sides of the tray (6) are staggered. The rotating shaft (7) is rotatably connected to the chain (5) on one side of it.

3. The lifting hammer impact testing machine according to claim 1, characterized in that, The clamping assembly includes two electrically controlled slide rails (8) fixed on the tray (6), the two electrically controlled slide rails (8) are arranged opposite to each other, and a clamping plate (9) is fixed on the sliding part of the electrically controlled slide rail (8).

4. The lifting hammer impact testing machine according to claim 1, characterized in that, The slide bar (15) is connected to the groove wall of the guide groove (14) by a first spring (16), and the vertical plate (18) is connected to the groove wall of the slide groove (17) by a second spring (20). The stiffness coefficient of the second spring (20) is greater than that of the first spring (16).

5. The lifting hammer impact testing machine according to claim 1, characterized in that, The lower end of the upright plate (18) is machined with a guide slope (19), and the bottom support plate (6) can drive the upright plate (18) to move into the slide groove (17) through the guide slope (19) during the upward movement.

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