Height measuring device of drop hammer testing machine

Abstract

The utility model discloses a height measuring device for a drop weight testing machine, which comprises a base, two sides of the upper end of the base are respectively provided with a mounting rack, the top and the bottom of one side of each mounting rack are respectively provided with an auxiliary wheel seat and a main wheel seat, the auxiliary wheel seats are rotatably connected with auxiliary wheels, the main wheel seats are rotatably connected with main wheels, and the main wheels are rotatably connected with the auxiliary wheels. A sensor base is fixed to one side of the main wheel, an angle sensor is installed at one end of the sensor base, a steel wire synchronous belt is arranged between the main wheel and the auxiliary wheel in a sleeved mode, and a cross beam is connected to the installation frame in a sliding mode. According to the utility model, measurement errors caused by ductility of a traditional steel wire rope or chain wheel are avoided, and the precision of height measurement is greatly improved, so that the result of a drop hammer impact test is more accurate and reliable, and more powerful data support is provided for performance evaluation of ferritic steel; the method is helpful for engineers and researchers to make more accurate material performance judgment, and provides a reliable basis for engineering design and quality control.

Description

Technical Field

[0001] This utility model relates to the field of drop weight testing machine technology, and in particular to a height measuring device for a drop weight testing machine. Background Technology

[0002] In the field of performance testing of metallic materials, the performance evaluation of ferritic steel is crucial, and the drop hammer impact test is a key testing method. This test applies impact loads to ferritic steel to simulate the impact conditions it may encounter in actual use, thereby evaluating the material's toughness and impact resistance. It plays an irreplaceable role in ensuring the safe application of ferritic steel in engineering.

[0003] With the rapid development of industry, the requirements for the performance of ferritic steels are increasing, and the demand for drop hammer impact testing has also increased significantly. To ensure the accuracy and reliability of the test results, the GB / T6803-2008 standard provides a comprehensive and detailed specification for the drop hammer test method for the non-plastic transformation temperature of ferritic steels. This standard covers all aspects of the test, from defining the test scope and principles, to clarifying terminology and definitions, to the requirements for specimen preparation, test equipment and instruments, the execution of the test procedure, the evaluation of test results, and the writing of test reports, all of which provide specific and strict regulations.

[0004] In drop hammer impact tests, the energy of the falling hammer is determined by both its mass and the impact height. For some lightweight testing machines requiring high-energy impacts, the impact height often needs to be increased to meet testing requirements. Accurate measurement of the lifting height plays a crucial role in the accuracy of the test data. However, traditional measurement methods typically use wire ropes or sprockets for lifting and height measurement. Wire ropes and sprockets have inherent ductility, which can lead to measurement deviations under prolonged use or high tensile stress, thus affecting the accuracy of the test data. This can not only mislead the performance evaluation of ferritic steels but also potentially pose safety hazards in practical engineering applications. Therefore, we propose a drop hammer impact testing machine height measurement device to address these issues. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a height measuring device for a drop hammer test machine.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A height measuring device for a drop weight testing machine includes a base. Mounting frames are installed on both sides of the upper end of the base. An auxiliary wheel seat and a main wheel seat are installed on the top and bottom of one side of each mounting frame. An auxiliary wheel is rotatably connected to the auxiliary wheel seat, and a main wheel is rotatably connected to the main wheel seat. A sensor seat is fixed to one side of the main wheel, and an angle sensor is installed at one end of the sensor seat. A steel wire synchronous belt is sleeved between the main wheel and the auxiliary wheel. A crossbeam is slidably connected to the mounting frame, and the crossbeam is connected to the steel wire synchronous belt via a connecting structure.

[0008] Preferably, an auxiliary wheel shaft is fixedly mounted on the middle part of the auxiliary wheel, and the auxiliary wheel shaft is connected to the auxiliary wheel seat through a first bearing. Bearing caps are installed at both ends of the first bearing.

[0009] Preferably, a main wheel axle is fixedly mounted on the middle of the main wheel, and the main wheel axle is mounted on the main wheel seat via a second bearing.

[0010] Preferably, the connection structure includes a middle beam lead-out seat fixed to one side of the crossbeam, an L-shaped plate fixed to one side of the upper end of the middle beam lead-out seat, a connecting plate fixed on the steel wire synchronous belt, and the L-shaped plate and the connecting plate being connected by bolts.

[0011] Preferably, a clamping mechanism is installed on the crossbeam.

[0012] In this invention, during the drop hammer impact test:

[0013] 1. Lifting mechanism drives the crossbeam to rise: During the preparation stage of the drop hammer impact test, the lifting mechanism starts to work, which drives the crossbeam to move upward. As a key structure connecting and supporting other components, the rise of the crossbeam lays the foundation for subsequent operations.

[0014] 2. The crossbeam drives the steel wire synchronous belt to move: As the crossbeam rises, the steel wire synchronous belt connected to it will also move. Since the steel wire synchronous belt is only subjected to a slight tension in this process, the effect of this tension on its deformation can be ignored, thus ensuring the stability and accuracy of the movement.

[0015] 3. Rotation of main wheel and auxiliary wheel: The movement of the steel wire synchronous belt drives the main wheel and auxiliary wheel that are matched with it to rotate. The main wheel and auxiliary wheel are respectively mounted on the main wheel seat and the auxiliary wheel seat through the shaft, and are rotated through the first bearing and the second bearing to ensure smooth rotation;

[0016] 4. Angle sensor measures lifting height: A sensor base is fixed on one side of the main wheel, and an angle sensor is installed on the sensor base. When the main wheel rotates, the angle sensor will rotate with it and convert the number of rotations of the main wheel into the lifting height. Since the circumference of the main wheel is fixed, by measuring the number of rotations, the moving distance of the wire synchronous belt can be accurately calculated, which is the lifting height of the crossbeam.

[0017] This utility model has the following advantages:

[0018] 1. By using a combination of steel wire synchronous belt and angle sensor, measurement errors caused by the ductility of traditional steel wire rope or sprocket are avoided;

[0019] 2. The angle sensor can accurately measure the number of rotations of the main wheel, thereby greatly improving the accuracy of the lifting height measurement, making the results of the drop hammer impact test more accurate and reliable, and providing stronger data support for the performance evaluation of ferritic steel.

[0020] 3. The accuracy of the lifting height measurement directly affects the reliability of the drop hammer impact test. An accurate lifting height ensures that the energy of the drop hammer is accurately applied to the sample, so that the test results can truly reflect the performance of ferritic steel. This helps engineers and researchers make more accurate judgments on material properties and provides a reliable basis for engineering design and quality control.

[0021] In summary, this invention avoids measurement errors caused by the ductility of traditional wire ropes or sprockets, greatly improves the accuracy of lifting height measurement, and makes the results of drop hammer impact tests more accurate and reliable. It provides stronger data support for the performance evaluation of ferritic steel, helps engineers and researchers make more accurate material performance judgments, and provides a reliable basis for engineering design and quality control. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the pushing mechanism of this utility model;

[0023] Figure 2 for Figure 1 Enlarged view of the structure at point A.

[0024] In the diagram: 1 First bearing, 2 Auxiliary wheel shaft, 3 Auxiliary wheel seat, 4 Bearing cover, 5 Auxiliary wheel, 6 Connecting plate, 7 L-shaped plate, 8 Middle beam lead-out seat, 9 Steel wire synchronous belt, 10 Main wheel, 11 Main wheel shaft, 12 Main wheel seat, 13 Angle sensor, 14 Sensor seat, 15 Clamping mechanism, 16 Crossbeam, 17 Base, 18 Mounting bracket. Detailed Implementation

[0025] 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.

[0026] Reference Figure 1-2A height measuring device for a drop hammer test machine includes a base 17, with mounting brackets 18 installed on both sides of the upper end of the base 17. The mounting brackets 18 are firmly connected to the base 17 by bolts, and precise positioning and calibration are required during installation to ensure the parallelism and perpendicularity of the mounting brackets 18 on both sides, thereby ensuring the accuracy of subsequent component installation and operation.

[0027] Auxiliary wheel seat 3 and main wheel seat 12 are installed on the top and bottom of one side of the mounting frame 18. The auxiliary wheel seat 3 and main wheel seat 12 are manufactured by integrated casting process, which has high strength and rigidity and can provide stable support for the auxiliary wheel 5 and main wheel 10. They are fixed to the mounting frame 18 by welding and bolts to further enhance the stability of the connection.

[0028] An auxiliary wheel 5 is rotatably connected to the auxiliary wheel seat 3, and a main wheel 10 is rotatably connected to the main wheel seat 12. A sensor seat 14 is fixed on one side of the main wheel 10. The sensor seat 14 is made of aluminum alloy, which is lightweight and has good corrosion resistance.

[0029] An angle sensor 13 is installed at one end of the sensor base 14. The angle sensor 13 is a high-precision photoelectric angle sensor, which has the characteristics of fast response speed and high measurement accuracy, and can accurately measure the rotation angle of the main wheel 10.

[0030] A steel wire synchronous belt 9 is fitted between the main wheel 10 and the auxiliary wheel 5. A crossbeam 16 is slidably connected on the mounting frame 18. The crossbeam 16 is connected to the steel wire synchronous belt 9 through a connecting structure. The steel wire synchronous belt 9 uses high-strength steel wire as the skeleton material and is covered with wear-resistant rubber. It has good flexibility and wear resistance and can maintain stable transmission performance during long-term operation.

[0031] The auxiliary wheel 5 is fixedly fitted with an auxiliary wheel shaft 2 in the middle. The auxiliary wheel shaft 2 is connected to the auxiliary wheel seat 3 through a first bearing 1. Bearing caps 4 are installed at both ends of the first bearing 1. The main wheel 10 is fixedly fitted with a main wheel shaft 11 in the middle. The main wheel shaft 11 is installed on the main wheel seat 12 through a second bearing. The bearing is a high-precision deep groove ball bearing, which can withstand radial and axial loads. The function of the bearing caps 4 is to prevent dust and debris from entering the bearing and extend the service life of the bearing.

[0032] The connection structure includes a middle beam lead-out seat 8 fixed on one side of the crossbeam 16, an L-shaped plate 7 fixed on one side of the upper end of the middle beam lead-out seat 8, a connecting plate 6 fixed on the steel wire synchronous belt 9, and the L-shaped plate 7 and the connecting plate 6 connected by bolts. A clamping mechanism 15 is installed on the crossbeam 16. The clamping mechanism 15 adopts an electromagnetic clamp for clamping the test object.

[0033] In this invention, during the drop hammer impact test:

[0034] 1. Lifting mechanism drives the crossbeam to rise: During the preparation stage of the drop hammer impact test, the lifting mechanism starts to work, which drives the crossbeam 16 to move upward. As a key structure connecting and supporting other components, the rise of the crossbeam lays the foundation for subsequent operations.

[0035] 2. The crossbeam drives the steel wire synchronous belt to move: As the crossbeam 16 rises, the steel wire synchronous belt 9 connected to it will also move. Since the steel wire synchronous belt 9 is only subjected to a slight tension in this process, the effect of this tension on its deformation can be ignored, thus ensuring the stability and accuracy of the movement.

[0036] 3. Rotation of main wheel and auxiliary wheel: The movement of the steel wire synchronous belt 9 drives the main wheel 10 and auxiliary wheel 5 to rotate. The main wheel 10 and auxiliary wheel 5 are respectively mounted on the main wheel seat 12 and the auxiliary wheel seat 3 through shafts, and are rotatably connected through the first bearing 1 and the second bearing to ensure smooth rotation.

[0037] 4. Angle sensor measures lifting height: A sensor seat 14 is fixed on one side of the main wheel 10, and an angle sensor 13 is installed on the sensor seat 14. When the main wheel 10 rotates, the angle sensor 13 will rotate accordingly and convert the number of rotations of the main wheel 10 into the lifting height. Since the circumference of the main wheel 10 is fixed, by measuring the number of rotations, the moving distance of the wire synchronous belt 9 can be accurately calculated, which is the lifting height of the crossbeam 16.

[0038] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A drop hammer testing machine height measuring device comprising a base (17), characterised in that, Mounting brackets (18) are installed on both sides of the upper end of the base (17). Auxiliary wheel seat (3) and main wheel seat (12) are installed on the top and bottom of one side of the mounting bracket (18). An auxiliary wheel (5) is rotatably connected to the auxiliary wheel seat (3). A main wheel (10) is rotatably connected to the main wheel seat (12). A sensor seat (14) is fixed on one side of the main wheel (10). An angle sensor (13) is installed at one end of the sensor seat (14). A steel wire synchronous belt (9) is sleeved between the main wheel (10) and the auxiliary wheel (5). A crossbeam (16) is slidably connected to the mounting bracket (18). The crossbeam (16) is connected to the steel wire synchronous belt (9) through a connecting structure.

2. The height measuring device for a drop weight testing machine according to claim 1, characterized in that: The auxiliary wheel (5) is fixedly fitted with an auxiliary wheel shaft (2) in the middle. The auxiliary wheel shaft (2) is connected to the auxiliary wheel seat (3) through a first bearing (1). Bearing caps (4) are installed at both ends of the first bearing (1).

3. The height measuring device for a drop weight testing machine according to claim 1, characterized in that: The main wheel (10) has a main wheel shaft (11) fixedly mounted in the middle, and the main wheel shaft (11) is mounted on the main wheel seat (12) through a second bearing.

4. The height measuring device for a drop weight testing machine according to claim 1, characterized in that: The connection structure includes a middle beam lead-out seat (8) fixed on one side of the crossbeam (16), an L-shaped plate (7) fixed on one side of the upper end of the middle beam lead-out seat (8), a connecting plate (6) fixed on the steel wire synchronous belt (9), and the L-shaped plate (7) and the connecting plate (6) are connected by bolts.

5. The height measuring device for a drop weight testing machine according to claim 1, characterized in that: A clamping mechanism (15) is installed on the crossbeam (16).

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