Pencil hardness intelligent testing machine based on precise static force loading

Abstract

The invention relates to the technical field of pencil lead detection, in particular to an intelligent pencil hardness testing machine based on precise static force loading, which comprises a bottom plate, a plurality of holes are formed in the side wall of the top end of the bottom plate, a plurality of first electric telescopic rods are fixedly connected in the corresponding holes, and a supporting plate is arranged at the telescopic ends of the first electric telescopic rods. According to the intelligent pencil hardness testing machine based on precise static force loading, precise adjustment of the position and the angle of a pencil in the plane can be achieved through the adjusting mechanism, it is ensured that the error of loading force is extremely small, and the testing accuracy is improved. In the testing process, the first sensor monitors data such as pressure changes borne by the testing table in real time, and traces left on the surface of the testing table by the refill are observed.

Description

Technical Field

[0001] The present invention relates to the technical field of pencil lead detection, and in particular to an intelligent pencil hardness testing machine based on precise static force loading. Background Art

[0002] The main component of pencil lead is graphite. In fact, pencil lead is made of graphite and clay mixed in a certain proportion. The hardness of pencil lead needs to be tested after production and processing. Traditional pencil hardness testing mainly relies on manual operation. The operator manually holds the pencil and presses on the surface of the material at a certain angle and pressure. The hardness of the material is judged by observing the collapse and fracture of the lead surface.

[0003] Manual operation is difficult to ensure the accuracy and stability of force application. During the test, the position and angle of the pencil and the test surface will have a significant impact on the test results. Therefore, it is necessary to adjust the angle between the pencil and the test surface to determine the hardness of the pencil lead at various angles. Traditional testing methods often require a lot of manual operations, such as manually adjusting the pencil position and angle, manually applying the loading force, etc. The operation process is cumbersome and the test efficiency is low. If the position is offset or the angle is inaccurate, the hardness of the pencil cannot be truly reflected. Secondly, after the pencil hardness test, impurities such as pencil debris and traces will remain on the surface of the test platform. If not cleaned in time, the residual pencil lead impurities will change the flatness and friction coefficient of the test plate surface, which will affect the accuracy of subsequent test results. In order to solve the above problems, we proposed an intelligent pencil hardness testing machine based on precise static force loading. Summary of the Invention

[0004] The main purpose of the present invention is to provide an intelligent pencil hardness testing machine based on precise static force loading, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] An intelligent pencil hardness testing machine based on precise static force loading comprises a bottom plate, a top side wall of the bottom plate is provided with a plurality of holes, and a plurality of first electric telescopic rods are fixedly connected to the corresponding holes, and a support plate is provided at the telescopic end of the plurality of first electric telescopic rods, the top side walls of the support plate are all fixedly connected with a clamping mechanism for clamping a test platform, the top side walls of the two clamping mechanisms are both slidably connected with a cleaning mechanism for cleaning the test platform, the top side walls of the bottom plate are both slidably connected with a moving mechanism for adjusting the position of the pencil, and the moving mechanism comprises a bottom plate top Two first electric slide rails are provided on the side walls, and the inner sides of the two first electric slide rails are slidably connected to the first electric slider, and the top side walls of the two first electric sliders are provided with support frames, and the side walls corresponding to the two support frames are provided with second electric slide rails, and the inner sides of the two second electric slide rails are slidably connected to the second electric slider, and the side walls corresponding to the two second electric sliders are provided with lower pressure plates, and the bottom side walls of the lower pressure plates are slidably connected to an adjustment mechanism for adjusting the position angle of the pencil, and the bottom end of the adjustment mechanism is fixedly connected to a fixing mechanism for fixing the pencil.

[0007] Preferably, the top side wall of the support plate is detachably connected to a carrier frame, a first sensor is provided at the inner bottom end of the carrier frame, a test bench is provided at the top of the first sensor, and the top of the test bench is flush with the top of the carrier frame.

[0008] Preferably, the adjusting mechanism includes a fifth electric slide rail opened on the side wall at the bottom end of the lower pressure plate, a fifth electric slider is slidably connected to the inner side of the fifth electric slide rail, a first fixed block is provided on the side wall at the bottom end of the fifth electric slider, two second rotating plates are provided on the side wall at the bottom end of the first fixed block, a second motor is provided on the side wall at one end of the second rotating plate, a second transmission shaft is provided on the output end of the second motor passing through the second rotating plate, the outer side wall of the second transmission shaft is rotatably connected to the second rotating plate, a rotating block is fixedly connected to the outer side wall of the second transmission shaft, and the rotating block is located between the two second rotating plates.

[0009] Preferably, the fixing mechanism includes an inclined fixing block fixedly connected to the side wall of the bottom end of the second rotating plate, a triangular groove is provided on the side wall of one end of the inclined fixing block, three holes are provided on the inner side wall of the triangular groove in a circular array, and a seventh electric telescopic rod is fixedly connected to the corresponding holes, and a fixing frame is provided at the telescopic end of the seventh electric telescopic rod, and a plurality of electric rollers are rotatably connected to the inner side wall of the fixing frame.

[0010] Preferably, the inner side wall of the triangular groove is provided with a plurality of holes in a circular array, and an eighth electric telescopic rod is fixedly connected to the corresponding holes, and the plurality of eighth electric telescopic rods are all located below the seventh electric telescopic rod, and the telescopic end of the eighth electric telescopic rod is provided with a third clamping plate, the side wall of the bottom end of the inclined fixed block is provided with a second fixed block, and the side wall of one end of the second fixed block is provided with an angle sensor, and the side walls at both ends of the inclined fixed block are provided with mounting brackets, and the side wall of one end of the mounting bracket is provided with a hole and is fixedly connected to the ninth electric telescopic rod, and the telescopic end of the ninth electric telescopic rod is provided with a third fixing block, and the corresponding ends of the two third fixing blocks are provided with holes and are fixedly connected to the tenth electric telescopic rod, the telescopic end of the tenth electric telescopic rod is provided with a mounting plate, and the side wall of the other end of the mounting plate is provided with a second pressure sensor.

[0011] Preferably, the cleaning mechanism includes a third electric slide rail opened on the top side wall of the clamping frame, a third electric slider is slidably connected to the inner side of the third electric slide rail, a first movable plate is fixedly connected to the top side wall of the third electric slider, a hole is opened on the top side wall of the first movable plate and a fourth electric telescopic rod is fixedly connected, and a second movable plate is provided at the telescopic ends of the two fourth electric telescopic rods.

[0012] Preferably, a fourth electric slide rail is provided on the side wall at the bottom end of the second movable plate, a fourth electric slider is slidably connected to the inner side of the fourth electric slide rail, a guide plate is provided on the side wall at the bottom end of the fourth electric slider, a plurality of holes are provided on the bottom end of the guide plate, and a fifth electric telescopic rod is fixedly connected to the corresponding holes, and cleaning plates are provided at the telescopic ends of the plurality of fifth electric telescopic rods, and baffles are provided at both ends of the cleaning plates.

[0013] Preferably, a water storage tank is provided on the inner side of the guide plate, and a plurality of sixth electric telescopic rods are provided on the top side wall of the water storage tank, and pistons are provided on the telescopic ends of the plurality of sixth electric telescopic rods, and the side walls of the pistons are all in contact with the inner wall of the water storage tank. A plurality of holes are provided on the bottom end of the water storage tank, and a pressure valve is fixedly connected to the corresponding holes. A hole is provided on the side wall at one end of the second movable plate and a one-way valve is fixedly connected thereto. A water tank is provided on the top side wall of the second movable plate, and a hole is provided on the side wall at one end of the water tank and a water pump is fixedly connected thereto. A water pipe is provided on the output end of the water pump, and the other end of the water pipe is fixedly connected to one end of the one-way valve.

[0014] Preferably, two first rotating plates are provided on the side wall at the bottom end of the second movable plate, a first motor is provided on one end of one of the first rotating plates, a first transmission shaft is provided on the output end of the first motor passing through the first rotating plate, the first transmission shaft is located directly below the pressure valve, the outer side wall of the first transmission shaft is rotatably connected to the first rotating plate, the outer side wall of the first transmission shaft is provided with cleaning strips in a circumferential array, the top side wall of the bottom plate is detachably connected to a collection box, and the top of the collection box is flush with the top of the support plate.

[0015] Preferably, the clamping mechanism includes two clamping frames fixedly connected to the top side walls of the support plate, the corresponding side walls of the two clamping frames are each provided with a hole and fixedly connected to a second electric telescopic rod, the telescopic end of the second electric telescopic rod is provided with a first clamping plate, and multiple first clamping plates are each provided with a hole at one end and fixedly connected to a third electric telescopic rod, the telescopic end of the third electric telescopic rod is provided with a second clamping plate, and the other end of the second clamping plate is provided with an oblique groove.

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

[0017] 1. This intelligent pencil hardness testing machine based on precise static force loading features a fifth electric slider that slides on a fifth electric slide rail to adjust the lateral position of the pencil. A second motor drives the second transmission shaft to rotate, which in turn rotates the rotating block, thereby adjusting the pencil's angle. An angle sensor monitors the pencil's angle in real time. Subsequently, a second electric slider slides on the second electric slide rail, driving the lower pressure plate and the pencil downward. Simultaneously, multiple first electric telescopic rods operate to move the test bench upward, bringing the pencil lead into contact with the top of the test bench. The lower pressure plate continues to move downward, applying a preset load to the lead, ensuring minimal loading force error and providing a basis for accurate test results. During the test, the first sensor monitors data such as pressure changes on the test bench in real time, observing the traces left by the lead on the test bench surface. If the lead breaks, the relevant parameters of the lead and the test results are recorded. A fixing mechanism allows for convenient and quick pencil replacement, quickly positioning and securing the pencil during replacement, saving testing time. The hardness of pencil leads of different lead lengths can be tested. The second pressure sensor also monitors the pressure applied to the lead to test the lateral hardness of the lead.

[0018] 2. This intelligent pencil hardness testing machine, based on precise static force loading, features a cleaning mechanism that automatically cleans the test platform after the test is completed. A water pump delivers water to a water tank, where a sixth electric telescopic rod pushes a piston to eject water through a pressure valve. This mechanism, combined with a cleaning strip and plate, cleans the test platform surface, effectively removing deeply embedded pencil lead residues. This maintains a clean testing environment, prevents potential deviations in subsequent test results, and prepares for the next test. Manual cleaning is eliminated, improving overall testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic cross-sectional view of the overall structure of the present invention;

[0021] Figure 3 This is an enlarged schematic diagram of point A in the present invention;

[0022] Figure 4 This is an enlarged schematic diagram of point B in the present invention;

[0023] Figure 5 This is the second schematic cross-sectional view of the overall structure of the present invention;

[0024] Figure 6 It is a schematic diagram of the partial structure of the clamping mechanism of the present invention;

[0025] Figure 7 Schematic diagram of the overall structure of the adjustment mechanism of the present invention;

[0026] Figure 8 It is a schematic diagram of the partial structure of the cleaning mechanism of the present invention.

[0027] In the figure: 1. Base plate; 11. First electric telescopic rod; 12. Support plate; 13. Carrying frame; 14. First sensor; 15. Test bench; 16. Collection box; 2. Moving mechanism; 3. Clamping mechanism; 4. Cleaning mechanism; 5. Adjusting mechanism; 6. Fixing mechanism; 21. First electric slide rail; 22. First electric slider; 23. Support frame; 24. Second electric slide rail; 25. Second electric slider; 26. Lower pressure plate; 31. Clamping frame; 32. Second electric telescopic rod; 33. First clamping plate; 34. Third electric telescopic rod; 35. Second clamping plate; 36. Chute; 41. Third electric slide rail; 42. Third electric slider; 43. First moving plate; 44. Fourth electric telescopic rod; 45. Second moving plate; 46. Fourth electric slide rail; 47. Fourth electric slider; 48. Guide plate; 49. Fifth electric telescopic rod; 491. Cleaning plate; 492. Baffle; 493. Water pump; 494, water pipe; 495, one-way valve; 496, water storage tank; 497, sixth electric telescopic rod; 498, piston; 499, pressure valve; 4911, first rotating plate; 4912, first motor; 4913, first transmission shaft; 4914, cleaning strip; 4915, water tank; 51, fifth electric slide rail; 52, fifth electric slider; 53, first fixed block; 54, second rotating plate; 55, second motor; 56, second Drive shaft; 57, rotating block; 61, tilting fixed block; 62, triangular groove; 63, seventh electric telescopic rod; 64, fixing frame; 65, electric roller; 66, eighth electric telescopic rod; 67, third clamping plate; 68, second fixing block; 69, angle sensor; 691, mounting frame; 692, ninth electric telescopic rod; 693, third fixing block; 694, tenth electric telescopic rod; 695, mounting plate; 696, second pressure sensor. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0029] like Figures 1-8As shown, an intelligent pencil hardness testing machine based on precise static force loading includes a base plate 1, a plurality of holes are opened on the top side wall of the base plate 1, and a plurality of first electric telescopic rods 11 are fixedly connected to the corresponding holes. The telescopic ends of the plurality of first electric telescopic rods 11 are provided with support plates 12, and the top side walls of the support plates 12 are fixedly connected with a clamping mechanism 3 for clamping the test platform. The top side walls of the two clamping mechanisms 3 are slidably connected with a cleaning mechanism 4 for cleaning the test platform. The top side walls of the base plate 1 are slidably connected with a moving mechanism 2 for adjusting the position of the pencil. The moving mechanism 2 includes a bottom plate 1 with a top side wall opening. Two first electric slide rails 21 are provided, and the inner sides of the two first electric slide rails 21 are slidably connected to the first electric sliders 22, and the top side walls of the two first electric sliders 22 are provided with support frames 23. The side walls corresponding to the two support frames 23 are provided with second electric slide rails 24, and the inner sides of the two second electric slide rails 24 are slidably connected to the second electric sliders 25. The side walls corresponding to the two second electric sliders 25 are provided with lower pressing plates 26, and the side walls at the bottom end of the lower pressing plates 26 are slidably connected to the adjusting mechanism 5 for adjusting the position angle of the pencil, and the bottom end of the adjusting mechanism 5 is fixedly connected to a fixing mechanism 6 for fixing the pencil.

[0030] In this embodiment, the top side wall of the support plate 12 is detachably connected to a carrier frame 13 , a first sensor 14 is provided at the inner bottom end of the carrier frame 13 , a test bench 15 is provided at the top of the first sensor 14 , and the top of the test bench 15 is flush with the top of the carrier frame 13 .

[0031] Specifically, the operation of the multiple first electric telescopic rods 11 causes the test platform 15 to move upward, so that the pencil lead contacts the top of the test platform 15. The lower pressure plate 26 continues to move downward to apply a preset load to the lead. During the test, the first sensor 14 monitors data such as the pressure changes on the test platform 15 in real time.

[0032] In this embodiment, the adjusting mechanism 5 includes a fifth electric slide rail 51 opened on the bottom side wall of the lower pressure plate 26, and the fifth electric slider 52 is slidably connected to the inner side of the fifth electric slide rail 51, and the bottom side wall of the fifth electric slider 52 is provided with a first fixed block 53, and the bottom side wall of the first fixed block 53 is provided with two second rotating plates 54, and a second motor 55 is provided on the side wall of one end of the second rotating plate 54, and a second transmission shaft 56 is provided on the output end of the second motor 55 through the second rotating plate 54, and the outer side wall of the second transmission shaft 56 is rotatably connected to the second rotating plate 54, and the outer side wall of the second transmission shaft 56 is fixedly connected to a rotating block 57, and the rotating block 57 is located between the two second rotating plates 54.

[0033] Specifically, the adjustment mechanism 5 works, the fifth electric slider 52 slides on the fifth electric slide rail 51 to adjust the lateral position of the pencil, the second motor 55 is started, driving the second transmission shaft 56 to rotate, and the rotating block 57 rotates accordingly, thereby adjusting the angle of the pencil.

[0034] In this embodiment, the fixing mechanism 6 includes an inclined fixing block 61 fixedly connected to the side wall of the bottom end of the second rotating plate 54. A triangular groove 62 is provided on the side wall of one end of the inclined fixing block 61. Three holes are provided on the inner side wall of the triangular groove 62 in a circular array, and a seventh electric telescopic rod 63 is fixedly connected to the corresponding holes. A fixing frame 64 is provided at the telescopic end of the seventh electric telescopic rod 63, and a plurality of electric rollers 65 are rotatably connected to the inner side wall of the fixing frame 64.

[0035] Specifically, a pencil is placed in the triangular groove 62 of the fixing mechanism 6, with the direction of the pencil lead in the same direction as the angle sensor 69. The seventh electric telescopic rod 63 is extended to move the fixing frame 64 close to the pencil, so that the multiple electric rollers 65 are in contact with the outer wall of the pencil, and the electric rollers 65 rotate to assist in positioning the pencil.

[0036] In this embodiment, the inner side wall of the triangular groove 62 is provided with a plurality of holes in a circular array, and an eighth electric telescopic rod 66 is fixedly connected to the corresponding holes. The plurality of eighth electric telescopic rods 66 are all located below the seventh electric telescopic rod 63. A third clamping plate 67 is provided at the telescopic end of the eighth electric telescopic rod 66. A second fixing block 68 is provided on the side wall of the bottom end of the tilting fixed block 61. An angle sensor 69 is provided on the side wall of one end of the second fixing block 68. A mounting bracket 691 is provided on both end side walls of the tilting fixed block 61. A hole is provided on the side wall of one end of the mounting bracket 691 and a ninth electric telescopic rod 692 is fixedly connected to the mounting bracket 691. A third fixing block 693 is provided at the telescopic end of the ninth electric telescopic rod 692. A hole is provided at the corresponding end of the two third fixing blocks 693 and a tenth electric telescopic rod 694 is fixedly connected to the mounting bracket 691. A mounting plate 695 is provided at the telescopic end of the tenth electric telescopic rod 694. A second pressure sensor 696 is provided on the side wall of the other end of the mounting plate 695.

[0037] Specifically, the operation of the multiple eighth electric telescopic rods 66 drives the multiple third clamping plates 67 to extend, so that the side walls of the third clamping plates 67 fit against the outer wall of the pencil, thereby further fixing the pencil. The third fixing block 693 is pushed by the ninth electric telescopic rod 692, and the mounting plate 695 is pushed toward the pencil lead by the tenth electric telescopic rod 694, so that the second pressure sensor 696 contacts the pencil lead. The pressure applied to the pencil lead is monitored by the second pressure sensor 696, thereby testing the lateral hardness of the pencil lead.

[0038] In this embodiment, the cleaning mechanism 4 includes a third electric slide rail 41 opened on the top side wall of the clamping frame 31, and the third electric slider 42 is slidably connected to the inner side of the third electric slide rail 41. The top side wall of the third electric slider 42 is fixedly connected to the first movable plate 43. The top side wall of the first movable plate 43 is provided with a hole and is fixedly connected to the fourth electric telescopic rod 44. The two telescopic ends of the fourth electric telescopic rods 44 are provided with a second movable plate 45.

[0039] Specifically, the cleaning mechanism 4 is started, and the third electric slider 42 slides on the third electric slide rail 41, driving the first movable plate 43 to move to the side above the test bench 15. At this time, the fourth electric telescopic rod 44 extends to lower the second movable plate 45 to a suitable height.

[0040] In this embodiment, a fourth electric slide rail 46 is provided on the side wall at the bottom end of the second movable plate 45, and a fourth electric slider 47 is slidably connected to the inner side of the fourth electric slide rail 46. A guide plate 48 is provided on the side wall at the bottom end of the fourth electric slider 47. A plurality of holes are provided on the bottom end of the guide plate 48, and a fifth electric telescopic rod 49 is fixedly connected to the corresponding holes. Cleaning plates 491 are provided at the telescopic ends of the plurality of fifth electric telescopic rods 49, and baffles 492 are provided at both ends of the cleaning plates 491.

[0041] Specifically, multiple fifth electric telescopic rods 49 are extended to make the bottom end of the cleaning plate 491 contact the surface of the test bench 15, cleaning impurities and water marks into the collection box 16, and the baffles 492 at both ends of the cleaning plate 491 prevent impurities from splashing.

[0042] In this embodiment, a water tank 496 is provided on the inner side of the guide plate 48, and a plurality of sixth electric telescopic rods 497 are provided on the top side wall of the water tank 496. The telescopic ends of the plurality of sixth electric telescopic rods 497 are provided with pistons 498, and the side walls of the pistons 498 are all in contact with the inner wall of the water tank 496. A plurality of holes are provided at the bottom end of the water tank 496, and a pressure valve 499 is fixedly connected to the corresponding holes. A hole is provided on the side wall at one end of the second movable plate 45 and a one-way valve 495 is fixedly connected thereto. A water tank 4915 is provided on the top side wall of the second movable plate 45, and a hole is provided on the side wall at one end of the water tank 4915 and a water pump 493 is fixedly connected thereto. A water pipe 494 is provided at the output end of the water pump 493, and the other end of the water pipe 494 is fixedly connected to one end of the one-way valve 495.

[0043] Specifically, the water pump 493 is controlled to start, and the water in the water tank 4915 is transferred to the water storage tank 496 through the water pipe 494 and the one-way valve 495. Then, the sixth electric telescopic rod 497 is extended to push the piston 498 to move downward in the water storage tank 496. The water is sprayed onto the surface of the cleaning strip 4914 through the pressure valve 499. At the same time, the first motor 4912 is started, driving the first transmission shaft 4913 to rotate, so that the cleaning strip 4914 soaked in water cleans the surface of the test bench 15 and removes some deeply embedded pencil lead impurities.

[0044] In this embodiment, two first rotating plates 4911 are provided on the side wall at the bottom end of the second movable plate 45, and a first motor 4912 is provided at one end of one first rotating plate 4911. The output end of the first motor 4912 passes through the first rotating plate 4911 and is provided with a first transmission shaft 4913. The first transmission shaft 4913 is located directly below the pressure valve 499, and the outer wall of the first transmission shaft 4913 is rotatably connected to the first rotating plate 4911. The outer wall of the first transmission shaft 4913 is provided with cleaning strips 4914 in a circular array. The top side wall of the bottom plate 1 is detachably connected to the collecting box 16, and the top of the collecting box 16 is flush with the top of the support plate 12.

[0045] Specifically, the fourth electric slider 47 slides on the fourth electric slide rail 46, driving the guide plate 48 to move, so that the cleaning strip 4914 and the cleaning plate 491 can clean the entire surface of the test bench 15. The cleaning operation is repeated many times until the surface of the test bench 15 is clean. After the test is completed, the entire surface of the test bench 15 is cleaned again by the cleaning mechanism 4, and then the impurities in the collection box 16 are cleaned.

[0046] In this embodiment, the clamping mechanism 3 includes two clamping frames 31 fixedly connected to the top side walls of the support plate 12, and the corresponding side walls of the two clamping frames 31 are each provided with a hole and fixedly connected to a second electric telescopic rod 32, and the telescopic end of the second electric telescopic rod 32 is provided with a first clamping plate 33, and one end of multiple first clamping plates 33 is provided with a hole and fixedly connected to a third electric telescopic rod 34, and the telescopic end of the third electric telescopic rod 34 is provided with a second clamping plate 35, and the other end of the second clamping plate 35 is provided with an inclined groove 36.

[0047] Specifically, the clamping mechanism 3 is started, and the multiple second electric telescopic rods 32 start to operate, so that the first clamping plate 33 is close to the carrier 13, and the side wall of the first clamping plate 33 is fitted with the side wall of the carrier 13. At the same time, the multiple third electric telescopic rods 34 are operated, so that the side wall of the second clamping plate 35 is fitted with the side wall of the carrier 13. In addition, the inclined groove 36 opened on the second clamping plate 35 can better fit the edge of the sample, thereby positioning and clamping the carrier 13.

[0048] It should be noted that the present invention is an intelligent pencil hardness tester based on precise static force loading. The carrier 13 is installed on the top side wall of the support plate 12, and the clamping mechanism 3 is started to make the multiple second electric telescopic rods 32 start to operate, so that the first clamping plate 33 is close to the carrier 13, and the side wall of the first clamping plate 33 is fitted with the side wall of the carrier 13. At the same time, the multiple third electric telescopic rods 34 are operated to make the side wall of the second clamping plate 35 fit with the side wall of the carrier 13. In addition, the inclined slot 36 provided on the second clamping plate 35 can be used to adjust the hardness of the pencil. The pencil is then placed in the triangular groove 62 of the fixing mechanism 6, with the direction of the pencil core being the same as that of the angle sensor 69. The seventh electric telescopic rod 63 is extended, and the fixing frame 64 is brought close to the pencil, so that the multiple electric rollers 65 are in contact with the outer wall of the pencil. The electric rollers 65 rotate to assist in positioning the pencil. At the same time, the multiple eighth electric telescopic rods 66 are driven to extend the multiple third clamping plates 67, so that the side walls of the third clamping plates 67 are in contact with the outer wall of the pencil, thereby further The pencil is fixed and the moving mechanism 2 is activated, causing the multiple first electric sliders 22 to slide on the first electric slide rail 21, driving the support frame 23 to move to the appropriate lateral position. The adjustment mechanism 5 is activated, and the fifth electric slider 52 slides on the fifth electric slide rail 51 to adjust the lateral position of the pencil. The second motor 55 is activated, driving the second transmission shaft 56 to rotate, and the rotating block 57 rotates accordingly, thereby adjusting the angle of the pencil. The angle sensor 69 monitors the pencil angle in real time. Subsequently, the second electric slider 25 slides on the second electric slide rail 24, driving the lower pressure plate 26 and the pencil to move downward. At the same time, the multiple first electric telescopic rods 11 operate to move the test platform 15 upward, so that the pencil lead contacts the top of the test platform 15. The lower pressure plate 26 continues to move downward to apply a preset load to the lead. During the test, the first sensor 14 monitors the pressure changes on the test platform 15 in real time, observing the marks left by the lead on the surface of the test platform 15. If the lead breaks, the relevant parameters of the lead and the test results are recorded. Then the lower pressure plate 26 drives the pencil to move upward.

[0049] The cleaning mechanism 4 is started, and the third electric slider 42 slides on the third electric slide rail 41, driving the first movable plate 43 to move to the side above the test bench 15. At this time, the fourth electric telescopic rod 44 extends to make the second movable plate 45 drop to a suitable height. Then the water pump 493 is controlled to start, and the water in the water tank 4915 is transferred to the water storage tank 496 through the water pipe 494 and the one-way valve 495. Then, the sixth electric telescopic rod 497 is extended to push the piston 498 to move downward in the water storage tank 496. The water is sprayed onto the surface of the cleaning strip 4914 through the pressure valve 499. At the same time, the first motor 4912 is started to drive the first transmission shaft 4913 to rotate , so that the cleaning strip 4914 soaked in water cleans the surface of the test bench 15 and removes some deeply embedded pencil lead impurities. At the same time, multiple fifth electric telescopic rods 49 are extended to make the lowest end of the cleaning plate 491 contact the surface of the test bench 15, and clean the impurities and water marks into the collection box 16. The baffles 492 at both ends of the cleaning plate 491 prevent impurities from splashing. The fourth electric slider 47 slides on the fourth electric slide rail 46, driving the guide plate 48 to move, so that the cleaning strip 4914 and the cleaning plate 491 can clean the entire surface of the test bench 15. The cleaning operation is repeated many times until the surface of the test bench 15 is clean.

[0050] After cleaning, a pencil of the same model is replaced and inserted into the triangular groove 62 of the fixing mechanism 6 again, and the pencil is fixed by multiple third clamping plates 67. Then, the second motor 55 is started again to drive the second transmission shaft 56 to rotate, and the rotating block 57 rotates accordingly, thereby adjusting the pencil to a different angle than before. At the same time, the angle sensor 69 monitors the pencil angle in real time, and then moves the lower pressure plate 26 and the pencil downward so that the pencil lead contacts the top of the test bench 15 again. The first sensor 14 monitors the pressure changes on the test bench 15 in real time and observes the traces left by the lead on the surface of the test bench 15. If the lead breaks, the lower pressure plate 26 stops pressing down and records the relevant parameters and test results of the lead at this time, thereby testing the hardness values ​​of the pencil lead at different angles between the lead and the test bench 15, and, The third clamping plate 67 is no longer in contact with the outer wall of the pencil by contracting the multiple eighth electric telescopic rods 66. Subsequently, the pencil is moved downward to a corresponding position by the rotation of the multiple sets of electric rollers 65. The third clamping plate 67 is driven by the multiple eighth electric telescopic rods 66 to fix the pencil again, so that the hardness of the pencil lead at different lengths can be tested. In addition, the third fixing block 693 is pushed by the ninth electric telescopic rod 692, and the mounting plate 695 is pushed toward the pencil lead by the tenth electric telescopic rod 694, so that the second pressure sensor 696 is in contact with the pencil lead. The pressure applied to the pencil lead is monitored by the second pressure sensor 696, so as to test the lateral hardness of the pencil lead. After the test is completed, the entire surface of the test bench 15 is cleaned again by the cleaning mechanism 4, and then the impurities in the collection box 16 are cleaned.

[0051] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent pencil hardness testing machine based on precise static force loading, comprising a base plate (1), characterized in that: The top side wall of the bottom plate (1) is provided with a plurality of holes, and a first electric telescopic rod (11) is fixedly connected to the corresponding holes. The telescopic ends of the plurality of first electric telescopic rods (11) are provided with a support plate (12). The top side walls of the support plates (12) are all fixedly connected with a clamping mechanism (3) for clamping the test platform. The top side walls of the two clamping mechanisms (3) are both slidably connected with a cleaning mechanism (4) for cleaning the test platform. The top side walls of the bottom plate (1) are all slidably connected with a moving mechanism (2) for adjusting the position of the pencil. The moving mechanism (2) includes two first electric slide rails (21) provided on the top side wall of the bottom plate (1). The two first electric slide rails (21) are fixedly connected with the two first electric slide rails (22) provided on the top side wall of the bottom plate (1). The inner side of each electric slide rail (21) is slidably connected to a first electric slider (22), the top side walls of the two first electric sliders (22) are both provided with a support frame (23), the side walls corresponding to one end of the two support frames (23) are both provided with a second electric slide rail (24), the inner side of each second electric slide rail (24) is slidably connected to a second electric slider (25), the side walls corresponding to one end of the two second electric sliders (25) are provided with a lower pressing plate (26), the lower side wall of the lower pressing plate (26) is slidably connected to an adjusting mechanism (5) for adjusting the position angle of a pencil, and the bottom end of the adjusting mechanism (5) is fixedly connected to a fixing mechanism (6) for fixing the pencil.

2. The intelligent pencil hardness testing machine based on precise static force loading according to claim 1, characterized in that: The top side wall of the support plate (12) is detachably connected to a carrier frame (13); a first sensor (14) is provided at the inner bottom end of the carrier frame (13); a test bench (15) is provided at the top end of the first sensor (14); and the top end of the test bench (15) is flush with the top end of the carrier frame (13).

3. The intelligent pencil hardness testing machine based on precise static force loading according to claim 1, characterized in that: The regulating mechanism (5) comprises a fifth electric slide rail (51) provided on the side wall at the bottom end of the lower pressure plate (26); a fifth electric slider (52) is slidably connected to the inner side of the fifth electric slide rail (51); a first fixed block (53) is provided on the side wall at the bottom end of the fifth electric slider (52); two second rotating plates (54) are provided on the side wall at the bottom end of the first fixed block (53); a second motor (55) is provided on the side wall at one end of one of the second rotating plates (54); a second transmission shaft (56) is provided on the output end of the second motor (55) passing through the second rotating plate (54); an outer side wall of the second transmission shaft (56) is rotatably connected to the second rotating plate (54); a rotating block (57) is fixedly connected to the outer side wall of the second transmission shaft (56); and the rotating block (57) is located between the two second rotating plates (54).

4. The intelligent pencil hardness testing machine based on precise static force loading according to claim 1, characterized in that: The fixing mechanism (6) comprises an inclined fixing block (61) fixedly connected to the side wall of the bottom end of the second rotating plate (54); a triangular groove (62) is provided on one side wall of the inclined fixing block (61); three holes are provided on the inner side wall of the triangular groove (62) in a circumferential array, and a seventh electric telescopic rod (63) is fixedly connected to the corresponding holes; a fixing frame (64) is provided at the telescopic end of the seventh electric telescopic rod (63); and a plurality of electric rollers (65) are rotatably connected to the inner side wall of the fixing frame (64).

5. The intelligent pencil hardness testing machine based on precise static force loading according to claim 4, characterized in that: The inner side wall of the triangular groove (62) is provided with a plurality of holes in a circular array, and an eighth electric telescopic rod (66) is fixedly connected to the corresponding holes. The plurality of eighth electric telescopic rods (66) are all located below the seventh electric telescopic rod (63). The telescopic end of the eighth electric telescopic rod (66) is provided with a third clamping plate (67). The bottom side wall of the tilted fixed block (61) is provided with a second fixed block (68). An angle sensor (69) is provided on one end side wall of the second fixed block (68). The side walls at both ends of the tilted fixed block (61) are provided with A mounting frame (691) is provided, a side wall at one end of the mounting frame (691) is provided with a hole and is fixedly connected to a ninth electric telescopic rod (692), a third fixing block (693) is provided at the telescopic end of the ninth electric telescopic rod (692), two corresponding ends of the third fixing blocks (693) are provided with holes and are fixedly connected to a tenth electric telescopic rod (694), a mounting plate (695) is provided at the telescopic end of the tenth electric telescopic rod (694), and a second pressure sensor (696) is provided on the side wall at the other end of the mounting plate (695).

6. The intelligent pencil hardness testing machine based on precise static force loading according to claim 1, characterized in that: The cleaning mechanism (4) comprises a third electric slide rail (41) provided on the top side wall of the clamping frame (31); a third electric slider (42) is slidably connected to the inner side of the third electric slide rail (41); a first movable plate (43) is fixedly connected to the top side wall of the third electric slider (42); a hole is provided on the top side wall of the first movable plate (43) and is fixedly connected to a fourth electric telescopic rod (44); and a second movable plate (45) is provided at the telescopic ends of the two fourth electric telescopic rods (44).

7. The intelligent pencil hardness testing machine based on precise static force loading according to claim 6, characterized in that: A fourth electric slide rail (46) is provided on the side wall at the bottom end of the second movable plate (45), a fourth electric slider (47) is slidably connected to the inner side of the fourth electric slide rail (46), a guide plate (48) is provided on the side wall at the bottom end of the fourth electric slider (47), a plurality of holes are provided on the bottom end of the guide plate (48), and a fifth electric telescopic rod (49) is fixedly connected to the corresponding holes, a plurality of the telescopic ends of the fifth electric telescopic rod (49) are provided with cleaning plates (491), and baffles (492) are provided at both ends of the cleaning plate (491).

8. The intelligent pencil hardness testing machine based on precise static force loading according to claim 7, characterized in that: A water storage tank (496) is provided on the inner side of the guide plate (48), and a plurality of sixth electric telescopic rods (497) are provided on the side wall of the top end of the water storage tank (496). A piston (498) is provided at the telescopic end of the plurality of sixth electric telescopic rods (497). The side walls of the pistons (498) are all in contact with the inner wall of the water storage tank (496). A plurality of holes are provided at the bottom end of the water storage tank (496) and are all fixedly connected to a pressure valve (499). A hole is provided on the side wall at one end of the second movable plate (45), and a one-way valve (495) is fixedly connected to the corresponding hole. A water tank (4915) is provided on the top side wall of the second movable plate (45). A hole is provided on the side wall at one end of the water tank (4915) and a water pump (493) is fixedly connected thereto. A water pipe (494) is provided at the output end of the water pump (493), and the other end of the water pipe (494) is fixedly connected to one end of the one-way valve (495).

9. The intelligent pencil hardness testing machine based on precise static force loading according to claim 6, characterized in that: Two first rotating plates (4911) are provided on the side wall at the bottom end of the second movable plate (45), and a first motor (4912) is provided at one end of one of the first rotating plates (4911). The output end of the first motor (4912) passes through the first rotating plate (4911) and is provided with a first transmission shaft (4913). The first transmission shaft (4913) is located directly below the pressure valve (499). The outer side wall of the first transmission shaft (4913) is rotatably connected to the first rotating plate (4911). The outer side wall of the first transmission shaft (4913) is provided with cleaning strips (4914) in a circumferential array. The top side wall of the bottom plate (1) is detachably connected to a collection box (16), and the top of the collection box (16) is flush with the top of the support plate (12).

10. The intelligent pencil hardness testing machine based on precise static force loading according to claim 1, characterized in that: The clamping mechanism (3) comprises two clamping frames (31) fixedly connected to the top side walls of the support plate (12); the corresponding side walls of the two clamping frames (31) are each provided with a hole and are fixedly connected to a second electric telescopic rod (32); the telescopic end of the second electric telescopic rod (32) is provided with a first clamping plate (33); one end of each of the plurality of first clamping plates (33) is provided with a hole and is fixedly connected to a third electric telescopic rod (34); the telescopic end of the third electric telescopic rod (34) is provided with a second clamping plate (35); and the other end of the second clamping plate (35) is provided with an inclined groove (36).

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