Digital gear generating experiment platform

Abstract

The invention relates to the technical field of experiment teaching platforms, and discloses a digital gear generating experiment platform which comprises a rack, a generating motion unit and a cutting motion unit. The generating motion unit comprises a transverse guide rail, a first sliding block, a rack-shaped cutter, a rotating disc, a first driving part and a second driving part, the cutting motion unit comprises a stand column and a third driving part, the stand column is vertically and fixedly connected to the first sliding block, and the rack-shaped cutter is slidably connected with the stand column. The radial movement unit realizes the movement of the rack-shaped cutter in the front-back direction, the generating movement unit realizes the movement of the rack-shaped cutter in the left-right direction, the cutting movement unit realizes the movement of the rack-shaped cutter in the up-down direction, and by adding the cutting movement unit, the generating principle of involute gear machining can be displayed more visually and stereoscopically. Students can understand the generating principle more easily, and the learning efficiency of the students is improved.

Description

Technical Field

[0001] The invention relates to the technical field of experimental teaching platforms, and in particular to a digital gear modeling experimental platform. Background Art

[0002] The Fancheng method is the most important method for machining involute gears, and is also the key content for mechanical engineering students in colleges to learn gear machining methods. The Fancheng method is relatively abstract, and classroom teaching must be combined with Fancheng experiments to enable beginners to form a certain perceptual understanding of the Fancheng principle.

[0003] The gear cutting instrument widely used at present mainly includes: a frame, a radial motion unit and a cutting motion unit. The cutting motion unit includes a turntable, a tool holder and a rack-shaped tool fixed to the tool holder. The turntable is connected to the frame in rotation, and the round white paper representing the gear blank is pressed on the turntable. The radial motion unit is used to adjust the distance from the center line of the rack-shaped tool to the center of the turntable. The turntable and the tool holder are driven by gear racks to realize the cutting motion between the gear blank and the rack-shaped tool. The envelope of the rack-shaped tool on the white paper forms an involute tooth profile curve, but since the relative motion between the white paper and the rack-shaped tool is on the same plane, the cutting motion cannot be reflected. It is necessary to draw the involute tooth profile curve on the white paper. However, some students may not have strong experimental operation ability or lack of experience, and the involute tooth profile curve drawn on the white paper often appears not smooth enough, distorted in shape, etc., which makes the demonstration of the cutting principle not intuitive and comprehensive enough, affecting students' understanding of the cutting principle. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a digital gear modeling experimental platform, which has a simple structure and is easy to use, and can present the modeling principle in three dimensions, so that students can understand the modeling principle more easily.

[0005] The present invention provides a digital gear fancheng experimental platform including: a frame, a fancheng motion unit and a cutting motion unit, the fancheng motion unit including a turntable, a first slider, a rack-shaped tool, a first driving component and a second driving component, the turntable is rotatably connected to the frame, the first driving component is connected to the turntable, the first driving component is used to drive the turntable to rotate, the first slider is slidably connected to the frame along the left and right directions of the frame, the second driving component is connected to the first slider, the second driving component is used to drive the first slider to slide, the rack-shaped tool is located at the top of the first slider, the blade of the rack-shaped tool is on the same side as the turntable, the cutting motion unit includes a column and a third driving component, the column is vertically fixed to the first slider, the rack-shaped tool is slidably connected to the column, the third driving component is connected to the rack-shaped tool, and the third driving component is used to drive the rack-shaped tool to slide along the direction of the column, so that the rack-shaped tool cuts the gear blank fixed on the turntable. On the basis of the machining motion of the gear blank and the rack-shaped tool, the cutting motion of the rack-shaped tool in the up and down directions is superimposed, which can demonstrate the machining principle of involute gears more intuitively and three-dimensionally. It has a simple structure and is easy to operate, making it easier for students to understand the machining principle and improving their learning efficiency.

[0006] Optionally, the material of the tooth blank is polystyrene, the rack-shaped cutter is an electric heating wire cutter, and a temperature control system is connected to the rack-shaped cutter, and the temperature control system is used to control the temperature of the rack-shaped cutter. The processing principle of using the electric heating wire cutter to melt the tooth blank made of polystyrene is very small, and the fixing requirements of the tooth blank on the turntable are not high, so it is easier to remove the excess part of the tooth blank.

[0007] Optionally, the digital gear Fancheng experimental platform also includes a radial motion unit, which includes two second sliders slidably connected along the front-back direction of the frame, a transverse guide rail is fixed between the two second sliders, the transverse guide rail is arranged along the left-right direction of the frame, and the first slider is slidably connected to the transverse guide rail. The cutting motion unit also includes: a plurality of pillars and a top plate, one end of the plurality of pillars is respectively vertically connected to the two second sliders, the top plate is connected to the other end of the pillar, the top plate is located above the rack-shaped tool, and the column is slidably connected to the top plate. The arrangement of the pillars and the top plate makes the movement process of the first slider more stable.

[0008] Optionally, a tool holder is connected between the column and the rack-shaped tool, the tool holder and the rack-shaped tool are detachably connected, the tool holder is sleeved on the column, and the tool holder is slidably connected to the column.

[0009] Optionally, the first driving component, the second driving component and the third driving component all include: a stepper motor, and the stepper motors are respectively connected to the turntable, the second slider and the first slider. The stepper motor can be controlled by a digital program, so that the experimental process can be completed automatically without human intervention in the middle. Students can concentrate on observing the formation process of the involute tooth profile curve, making it easier for students to understand the Fancheng principle.

[0010] Optionally, the second driving component and the third driving component both further include a transmission assembly, the transmission assembly structure is a belt transmission assembly, the first slider is connected to a group of transmission belts of the belt transmission assembly, so that the stepper motor transmits power to the first slider through the group of belt transmission assemblies, and the tool holder is connected to another group of transmission belts of the belt transmission assembly, so that the stepper motor transmits power to the tool holder through the other group of belt transmission assemblies. The belt transmission assembly has a simple structure, is easy to process, and has a low cost. This transmission method is intuitive and clear, and has high transmission efficiency.

[0011] Optionally, a through hole is provided in the middle of the tool holder, and a transmission belt of the belt transmission assembly is fixedly connected to the tool holder through the through hole, and there are two columns, which are respectively located on both sides of the through hole. The arrangement of the through hole and the columns makes the rack-shaped tool more stable when moving.

[0012] Optionally, the length of the column above the plane where the turntable is located is greater than the length of the column below the plane where the turntable is located, so that students can more easily observe the cutting process of the rack-shaped tool.

[0013] Optionally, the length of the column above the turntable is: 60mm-100mm, and the length of the column below the turntable is: 20mm-50mm, which further makes it easier for students to observe the cutting movement and understand the Fancheng principle.

[0014] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art: The digital gear shaping experiment platform provided by the embodiment of the present invention sets a shaping motion unit and a cutting motion unit. Before the experiment, the gear blank is fixed on a turntable. Students need to calculate the radial distance between the center line of the rack-shaped tool and the center of the gear blank according to the number of teeth, module, displacement, etc. of the processed gear, so that the radial distance between the center line of the rack-shaped tool and the center of the gear blank meets the processing requirements, control the third driving component to move the rack-shaped tool to the end of the column away from the first slider, and then control the second driving component to make the rack-shaped tool located at one end of the frame. At the beginning of the experiment, the first driving component is controlled to rotate the turntable at a certain angle, and the turntable drives the gear blank to rotate at the same angle. The second driving component controls the first slider to move to the other end of the frame, and the first slider moves a distance corresponding to the angle of rotation of the gear blank. Then the third driving component is controlled to move the rack-shaped tool toward the direction of the column close to the first slider, so that the rack-shaped tool passes through the gear blank and removes the excess material on the gear blank. When the rack-shaped tool reaches the position of the first slider, the third driving component is controlled to move the rack-shaped tool toward the direction of the column away from the first slider. When it reaches the end of the column away from the first slider, the first driving component is continued to control the turntable to rotate a certain angle, and the cycle is repeated in sequence to complete the Fancheng experiment. The rack-shaped tool is slidably connected to the column in the cutting motion unit to realize the up and down movement of the rack-shaped tool. The up and down movement of the rack-shaped tool is driven by the third driving component, so that the Fancheng principle of involute gear processing can be more intuitively and three-dimensionally demonstrated. The structure is simple and easy to operate, making it easier for students to understand the Fancheng principle and improve students' learning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A structural schematic diagram of a digital gear modeling experimental platform provided in an embodiment of the present invention.

[0016] Figure 2 A schematic diagram of a digital gear modeling experimental platform after a gear blank is installed provided in an embodiment of the present invention.

[0017] Figure 3 Schematic diagram of the structure of the radial motion unit before the experiment in the embodiment of the present invention.

[0018] Figure 4 It is a schematic diagram of the structure of the radial motion unit during the experiment in the embodiment of the present invention.

[0019] Figure 5 Schematic diagram of the structure of the Fancheng motion unit experiment in an embodiment of the present invention.

[0020] Figure 6 Schematic diagram of the structure when the Fan Cheng motor unit experiment is completed in an embodiment of the present invention.

[0021] Figure 7 It is a schematic diagram of the structure of the cutting motion unit before cutting in an embodiment of the present invention.

[0022] Figure 8 It is a schematic diagram of the structure of the cutting motion unit during cutting in an embodiment of the present invention.

[0023] Fig. 9 It is a schematic diagram of the structure of the cutting motion unit after cutting in an embodiment of the present invention.

[0024] Fig.10 Schematic diagram of the installation relationship between the rack-shaped tool and the tool holder in an embodiment of the present invention.

[0025] Fig.11 Schematic diagram of the structure of the second driving component in an embodiment of the present invention.

[0026] Fig.12 Schematic diagram of the structure of the third driving component in an embodiment of the present invention.

[0027] Description of reference numerals: 1. Turntable; 2. Rack-shaped tool; 3. Tool holder; 4. Column; 5. Pulley frame; 6. Top plate; 7. Pillar; 8. Transverse guide rail; 9. First slider; 10. Second slider; 11. Locking piece; 12. Radial guide rail; 13. Frame; 14. Pressure cover; 15. Nut; 16. Tooth blank; 17. Pressure block; 18. Third screw; 19. Heat-insulating sleeve; 20. Second pulley; 21. Third pulley; 22. Second transmission belt; 23. Second screw; 24. Fourth screw; 25. First pulley; 26. First transmission belt; 27. First screw; a. First stepper motor; b. Second stepper motor; c. Third stepper motor. DETAILED DESCRIPTION

[0028] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0029] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In addition, in the description of the present invention, "plurality" means two or more than two. The terms "first" and "second" are used for descriptive purposes only and should not be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature.

[0032] The present invention is described below by several specific embodiments. In order to keep the following description of the embodiments of the present invention clear and concise, the detailed description of known functions and known components may be omitted. When any component of the embodiments of the present invention appears in more than one accompanying drawings, the component may be represented by the same reference numeral in each of the accompanying drawings.

[0033] Reference Figures 1 to 9 , Figure 1 A schematic diagram of the structure of a digital gear modeling experimental platform provided by an embodiment of the present invention, Figure 2 A schematic diagram of a digital gear modeling experimental platform provided by an embodiment of the present invention after a gear blank is installed. Figure 3 This is a schematic diagram of the structure of the radial motion unit before the experiment in the embodiment of the present invention. Figure 4 It is a schematic diagram of the structure of the radial motion unit during the experiment in the embodiment of the present invention, Figure 5 It is a schematic diagram of the structure of the Fancheng motion unit experiment in an embodiment of the present invention. Figure 6 This is a schematic diagram of the structure of the Fancheng motion unit experiment at the end of the embodiment of the present invention. Figure 7 is a schematic diagram of the structure of the cutting motion unit before cutting in an embodiment of the present invention, Figure 8 It is a schematic diagram of the structure of the cutting motion unit in the embodiment of the present invention when cutting. Fig. 9 FIG. 1 is a schematic diagram of the structure of the cutting motion unit after cutting in an embodiment of the present invention. Figures 1 to 9As shown, an embodiment of the present invention provides a digital gear forming experimental platform including: a frame 13, a forming motion unit, and a cutting motion unit. The frame 13 can be a square support frame or other shapes. This embodiment does not make any specific restrictions, as long as it can play a supporting role. The Fancheng motion unit includes a turntable 1, a first slider 9, a rack-shaped tool 2, a first driving component and a second driving component. The turntable 1 is rotatably connected to the frame 13, the first driving component is connected to the turntable 1, and the first driving component is used to drive the turntable 1 to rotate. The first slider 9 is slidably connected to the frame 13 along the left and right directions of the frame 13. The second driving component is connected to the first slider 9, and the second driving component is used to drive the first slider 9 to slide. The rack-shaped tool 2 is located at the top of the first slider 9, and the blade of the rack-shaped tool 2 is on the same side as the turntable 1. The cutting motion unit includes a column 4 and a third driving component. The column 4 is vertically fixed to the first slider 9, the rack-shaped tool 2 is slidably connected to the column 4, the third driving component is connected to the rack-shaped tool 2, and the third driving component is used to drive the tool holder 3 to slide along the direction of the column 4, so that the rack-shaped tool 2 cuts the gear blank 16 fixed on the turntable 1.

[0034] The Fancheng motion unit realizes the left-right movement of the rack-shaped tool 2, and the cutting motion unit realizes the up-and-down movement of the rack-shaped tool 2. Before the experiment, the gear blank 16 is fixed on the turntable 1. Students need to calculate the radial distance between the center line of the rack-shaped tool 2 and the center of the gear blank 16 according to the number of teeth, module, displacement, etc. of the processed gear, and then move it to a suitable position and fix it through the radial motion unit, so that the radial distance between the center line of the rack-shaped tool 2 and the center of the gear blank 16 meets the processing requirements. The third driving component is controlled to move the rack-shaped tool 2 to the end of the column 4 away from the first slider 9, and then the second driving component is controlled to make the rack-shaped tool 2 located at the leftmost or rightmost end of the frame 13. Take the rack-shaped tool 2 at the rightmost end of the frame 13 as an example: when starting the experiment, the first driving component is controlled to rotate the turntable 1 by a certain angle, and the turntable 1 drives the gear blank 16 to rotate by the same angle. The second driving component is controlled to move the first slider 9 toward the left end of the frame 13, and the first slider 9 moves a distance corresponding to the angle of rotation of the gear blank 16. Then, the third driving component is controlled to move the tool holder 3 toward the direction of the column 4 close to the first slider 9, that is, to move downward, so that the rack-shaped tool 2 passes through the gear blank 16 and removes excess material on the gear blank 16. When the rack-shaped tool 2 reaches the lowest position, the third driving component is controlled to move the rack-shaped tool 2 upward. When it reaches the highest position, the first driving component is continued to be controlled to rotate the turntable 1 by a certain angle, and the cycle is repeated in sequence to complete the Fan Cheng experiment. When the present invention is used to complete the machining experiment, based on the machining movement of the gear blank 16 and the rack-shaped tool 2, the cutting movement of the rack-shaped tool 2 in the up and down directions enables the digital gear machining experiment platform to more intuitively and three-dimensionally display the machining principle of involute gears. It has a simple structure and is easy to operate, making it easier for students to understand the machining principle and improving their learning efficiency.

[0035] The material of the tooth blank 16 is polystyrene, the rack-shaped cutter 2 is an electric heating wire cutter, and a temperature control system is connected to the rack-shaped cutter 2, and the temperature control system is used to control the temperature of the rack-shaped cutter 2. The processing principle of using the electric heating wire cutter to melt the tooth blank 16 made of polystyrene is very small, and the fixing requirements of the tooth blank 16 on the turntable 1 are not high, and it is easier to remove the excess part of the tooth blank 16. The temperature control system adjusts the current in the electric heating wire cutter to keep it within a suitable temperature range, and can smoothly melt and remove the excess material on the tooth blank 16 made of polystyrene during the cutting process.

[0036] Refer again Figure 1 and Figure 2The digital gear Fancheng experimental platform also includes a radial motion unit, which includes two second sliders 10 slidably connected along the front-to-back direction of the frame 13, a transverse guide rail 8 is fixed between the two second sliders 10, and the transverse guide rail 8 is arranged along the left-right direction of the frame 13. The first slider 9 is slidably connected to the transverse guide rail 8. The cutting motion unit also includes: a plurality of pillars 7 and a top plate 6, one end of the plurality of pillars 7 is vertically connected to the two second sliders 10 respectively, the top plate 6 is connected to the other end of the pillar 7, the top plate 6 is located above the rack-shaped tool 2, and the column 4 is slidably connected to the top plate 6. Two radial guide rails 12 are arranged along the front-to-back direction of the frame 13, and the two second sliders 10 slide along the radial guide rails 12. The two second sliders 10 are connected with a locking member 11, and the locking member 11 is used to lock the position of the second slider 10. The arrangement of the two second sliders 10 and the transverse guide rail 8 realizes the movement of the rack-shaped tool 2 in the front-to-back direction. The arrangement of the pillars 7 and the top plate 6 makes the movement process of the first slider 9 more stable.

[0037] Reference Fig.10 , Fig.10 FIG. 2 is a schematic diagram of the installation relationship between the rack-shaped tool 2 and the tool holder 3 in an embodiment of the present invention. Fig.10 As shown, a tool holder 3 is connected between the column 4 and the rack-shaped tool 2, and the tool holder 3 is detachably connected to the rack-shaped tool 2. The tool holder 3 is sleeved on the column 4, and the tool holder 3 is slidably connected to the column 4. The setting of the tool holder 3 is that when the distance between the center line of the rack-shaped tool 2 and the center of the tooth blank 16 is required to be close, the rack-shaped tool 2 may be blocked by the turntable 1 and cannot be moved to a suitable position. The setting of the tool holder 3 avoids this situation. The detachable connection between the tool holder 3 and the rack-shaped tool 2 makes it possible to replace the type of rack-shaped tool 2 according to needs.

[0038] The first driving component, the second driving component and the third driving component all include: a stepping motor, and the stepping motor is connected to the turntable 1, the second slider 10 and the first slider 9 respectively.

[0039] Specifically, the first driving component includes a first stepper motor a, the first stepper motor a is connected to the frame 13, and the output end of the first stepper motor a is connected to the turntable 1. The rotation of the turntable 1 is controlled by the first stepper motor a. Fig.11 , Fig.11 Schematic diagram of the structure of the second driving component in an embodiment of the present invention. Fig.11As shown, the second driving component includes: a second stepper motor b, the second stepper motor b is connected to the second slider 10, the third driving component includes: a third stepper motor c, the third stepper motor c is connected to the first slider 9, the first stepper motor a, the second stepper motor b and the third stepper motor c are all controlled by a digital program, so that the experimental process can be completed automatically without human intervention in the middle. Students can concentrate on observing the formation process of the involute tooth profile curve, making it easier for students to understand the Fan Cheng principle.

[0040] The second driving component and the third driving component both further include a transmission assembly, and the transmission assembly structure is a belt transmission assembly, the first slider 9 is connected to a group of transmission belts of the belt transmission assembly, so that the stepper motor transmits to the first slider 9 through a group of belt transmission assemblies, and the tool holder 3 is connected to another group of transmission belts of the belt transmission assembly, so that the stepper motor transmits to the tool holder 3 through another group of belt transmission assemblies. The transmission assembly of the first driving component is the first transmission assembly, and the transmission assembly of the second driving component is the second transmission assembly, and both the first transmission assembly and the second transmission assembly are belt transmission assemblies.

[0041] Specifically, refer to Fig.11 , Fig.11 Schematic diagram of the structure of the second driving component in an embodiment of the present invention. Fig.11 As shown, the first transmission assembly includes: a first transmission belt 26 and two first pulleys 25, the two first pulleys 25 are rotatably connected to the bottom of the two second sliders 10 respectively, the second stepper motor b is connected to a second slider 10, the output end of the second stepper motor b is connected to the first pulley 25, the first transmission belt 26 is connected to the two first pulleys 25, and the first transmission belt 26 located on one side of the first pulley 25 is fixed to the first slider 9 by a first screw 27. When starting the experiment, the first stepper motor a is controlled to rotate a certain angle, thereby driving the turntable 1 to rotate a certain angle, and the turntable 1 drives the gear blank 16 to rotate the same angle, and the second stepper motor b is controlled to rotate, and the second stepper motor b drives the first pulley 25 to rotate, so that the first transmission belt 26 connected to the first pulley 25 moves in a straight line, and the first transmission belt 26 on one side of the first pulley 25 is fixedly connected to the first slider 9, thereby dragging the first slider 9 to move on the transverse guide rail 8, and the first slider 9 moves a distance corresponding to the angle rotated by the gear blank 16, and then the third driving component is controlled to make the tool holder 3 move toward the column 4 in the direction close to the first slider 9, so that the rack-shaped tool 2 passes through the gear blank 16, removes excess material on the gear blank 16, and uses the first transmission belt 26 to directly drag the first slider 9 to move, and converts the rotation of the second stepper motor b into the linear motion of the first slider 9.

[0042] Reference Fig.12 , Fig.12 FIG. 1 is a schematic diagram of the structure of the third driving component in an embodiment of the present invention. Fig.12As shown, the second transmission assembly includes: a pulley frame 5, a second pulley 20, a third pulley 21 and a second transmission belt 22. The pulley frame 5 is fixedly connected to the end of the column 4 close to the tool holder 3 by a fourth screw 24. The pulley frame 5 limits the tool holder 3 so that it moves to the position of the pulley frame 5 and no longer moves upward. The third pulley 21 is rotatably connected to the pulley frame 5. The second pulley 20 is connected to the output end of the third stepper motor c. The second transmission belt 22 is connected to the second pulley 20 and the third pulley 21. The second transmission belt 22 located on one side of the second pulley 20 and the third pulley 21 is fixedly connected to the tool holder 3 by a second screw 23. During the experiment, after the first slider 9 moves a distance corresponding to the angle of rotation of the tooth blank 16, the third stepper motor c is controlled to rotate, and the rotation of the third stepper motor c drives the second pulley 20 to rotate. The third pulley 21 is connected to the second pulley 20 through the second transmission belt 22. The third pulley 21 rotates, so that the second transmission belt 22 located on one side of the second pulley 20 and the third pulley 21 moves linearly. The transmission belt located on one side of the second pulley 20 and the third pulley 21 is fixedly connected to the tool holder 3. The second transmission belt 22 directly drags the tool holder 3 up and down, converting the rotation of the third stepper motor c into the linear motion of the tool holder 3. By setting up this belt transmission component, the digital gear modeling experimental platform provided in this embodiment has a simple structure, is easy to process, and has a low cost. The transmission method is intuitive and clear, and has high transmission efficiency.

[0043] Refer again Figure 2 The tooth blank 16 is detachably connected to the turntable 1 through the gland 14 and the nut 15. There is a screw in the middle of the turntable 1, the tooth blank 16 passes through the screw, the gland 14 is sleeved on the screw, the gland 14 is located at the end of the tooth blank 16 away from the turntable 1, and the nut 15 is threadedly sleeved on the screw. The detachable connection makes the tooth blank 16 replaceable, and the detachable connection achieved by the gland 14 and the nut 15 makes the operation process simpler and more convenient.

[0044] Refer again Fig.10 The rack-shaped tool 2 and the tool holder 3 are detachably connected by a pressure block 17 and a third screw 18. The pressure block 17 is located above the rack-shaped tool 2 and the tool holder 3 and is fixed by the third screw 18. A heat-insulating sleeve 19 is connected between the rack-shaped tool 2 and the tool holder 3. The heat-insulating sleeve 19 prevents the heat on the rack-shaped tool 2 from being transferred to the tool holder 3, making the device less likely to be damaged by high temperature and making it safer for students to experiment.

[0045] Refer again Figure 1 and Fig.10 A through hole is provided in the middle of the tool holder 3, and the second transmission belt 22 is fixedly connected to the tool holder 3 at the second through hole by a second screw 23. There are two upright posts 4, which are respectively located on both sides of the through hole. The arrangement of the through hole and the upright posts 4 makes the rack-shaped tool 2 more stable when moving.

[0046] The length of the column 4 above the plane where the turntable 1 is located is greater than the length of the column 4 below the plane where the turntable 1 is located, which makes it easier for students to observe the cutting process of the rack tool 2 by moving the rack-shaped tool 2 above the gear blank 16.

[0047] The length of the column 4 above the turntable 1 is: 60mm-100mm, and the length of the column 4 below the turntable 1 is: 20mm-50mm, which avoids the rack-shaped tool 2 having to move a large range for each cutting movement due to the column being too long, and also avoids the movement range being too small, which affects students' better observation of the cutting movement.

[0048] The first stepper motor a is located at the bottom of the turntable 1, the second stepper motor b is located at the bottom of the second slider 10, and the third stepper motor c is located at the bottom of the first slider 9, which is convenient for wiring and helps to ensure safety.

[0049] Working process and principle: Before the experiment, the circular polystyrene gear blank 16 is fixed on the turntable 1. Students need to calculate the radial distance between the center line of the rack-shaped tool 2 and the center of the gear blank 16 according to the number of teeth, module, displacement, etc. of the processed gear, and then slide the second slider 10 so that the distance between the center line of the rack-shaped tool 2 and the center of the gear blank 16 meets the processing requirements, and then lock the second slider 10 with the locking member 11. At the beginning of the experiment, the first stepper motor a is controlled to rotate a certain angle, thereby driving the turntable 1 to rotate a certain angle, and the turntable 1 drives the gear blank 16 to rotate the same angle, and the second stepper motor b is controlled to rotate, and the second stepper motor b drives the first pulley 25 to rotate, so that the first transmission belt 26 located on both sides of the first pulley 25 moves linearly, thereby dragging the first slider 9 to move left and right on the transverse guide rail 8, and the first slider 9 moves a distance corresponding to the angle of rotation of the gear blank 16, and the third stepper motor c is controlled to rotate, and the rotation of the third stepper motor c drives the second pulley 20 to rotate, and the third pulley 21 and the second pulley 20 are connected through the second transmission belt 22 is connected, so that the third pulley 21 rotates, and the second transmission belt 22 located on one side of the second pulley 20 and the third pulley 21 moves linearly, and the second transmission belt 22 drags the tool holder 3 to move downward, so that the rack-shaped tool 2 passes through the tooth blank 16, and removes the excess material on the tooth blank 16. When the tool holder 3 reaches the lowest position, the third stepper motor c rotates in the opposite direction to move the tool holder 3 upward. The tool holder 3 reaches the pulley frame 5, and the third stepper motor c stops rotating, and continues to control the first stepper motor a to rotate a certain angle, so that the turntable 1 rotates a certain angle, and then continues to control the second stepper motor b to rotate, and the above process is repeated to complete the Fan Cheng experiment. The entire experimental process adopts a digital drive mode, and no human intervention is required. The use of the first stepper motor a, the second stepper motor b, and the third stepper motor c makes the cost low and can be precisely controlled, making the experiment more accurate. The cutting movement of the rack-shaped tool 2 in the up and down directions is simple in structure and easy to operate. It can more intuitively and stereoscopically demonstrate the Fan Cheng principle of involute gear processing, making it easier for students to understand the Fan Cheng principle and improve students' learning efficiency.

[0050] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A digital gear modeling experimental platform, comprising a frame (13), characterized in that: Also includes: A Fancheng motion unit comprises a turntable (1), a first slider (9), a rack-shaped tool (2), a first driving component and a second driving component, wherein the turntable (1) is rotatably connected to the frame (13), the first driving component is connected to the turntable (1), and the first driving component is used to drive the turntable (1) to rotate; the first slider (9) is slidably connected to the frame (13) along the left-right direction of the frame (13), the second driving component is connected to the first slider (9), and the second driving component is used to drive the first slider (9) to slide; the rack-shaped tool (2) is located on the top of the first slider (9), and the blade of the rack-shaped tool (2) is on the same side as the turntable (1); The cutting motion unit comprises a column (4) and a third driving component, wherein the column (4) is vertically fixed to the first sliding block (9), the rack-shaped tool (2) is slidably connected to the column (4), and the third driving component is connected to the rack-shaped tool (2), and the third driving component is used to drive the rack-shaped tool (2) to slide along the column (4) so ​​that the rack-shaped tool (2) cuts a tooth blank (16) fixed on the rotating disk (1).

2. The digital gear modeling experimental platform according to claim 1, characterized in that: The material of the tooth blank (16) is polystyrene, the rack-shaped tool (2) is an electric heating wire tool, and the rack-shaped tool (2) is connected to a temperature control system, and the temperature control system is used to control the temperature of the rack-shaped tool (2).

3. The digital gear modeling experimental platform according to claim 1, characterized in that: The digital gear modeling experimental platform also includes a radial motion unit, which includes two second sliders (10) slidably connected along the front-to-back direction of the frame (13), a transverse guide rail (8) is fixed between the two second sliders (10), and the transverse guide rail (8) is arranged along the left-right direction of the frame (13). The first slider (9) is slidably connected to the transverse guide rail (8). The cutting motion unit also includes: a plurality of pillars (7) and a top plate (6), one end of the plurality of pillars (7) is respectively vertically connected to the two second sliders (10), the top plate (6) is connected to the other end of the pillar (7), the top plate (6) is located above the rack-shaped tool (2), and the column (4) is slidably connected to the top plate (6).

4. The digital gear modeling experimental platform as claimed in claim 3, characterized in that: A tool holder (3) is connected between the column (4) and the rack-shaped tool (2); the tool holder (3) is detachably connected to the rack-shaped tool (2); the tool holder (3) is sleeved on the column (4); and the tool holder (3) is slidably connected to the column (4).

5. The digital gear modeling experimental platform as claimed in claim 4, characterized in that: The first driving component, the second driving component and the third driving component all comprise a stepping motor, and the stepping motors are respectively connected to the rotating disk (1), the second sliding block (10) and the first sliding block (9).

6. The digital gear modeling experimental platform as claimed in claim 5, characterized in that: The second drive component and the third drive component both further include a transmission component, wherein the transmission component structure is a belt transmission component, the first slider (9) is connected to a transmission belt of a group of belt transmission components, so that the stepper motor is transmitted to the first slider (9) through the group of belt transmission components, and the tool holder (3) is connected to a transmission belt of another group of belt transmission components, so that the stepper motor is transmitted to the tool holder (3) through the other group of belt transmission components.

7. The digital gear modeling experimental platform as claimed in claim 6, characterized in that: A through hole is provided in the middle of the tool holder (3), and the transmission belt of the belt transmission assembly is fixedly connected to the tool holder (3) through the through hole. There are two upright posts (4), which are respectively located on both sides of the through hole.

8. The digital gear modeling experimental platform according to claim 1, characterized in that: The length of the column (4) located above the plane where the turntable (1) is located is greater than the length of the column (4) located below the plane where the turntable (1) is located.

9. The digital gear modeling experimental platform as claimed in claim 8, characterized in that: The length of the column (4) located above the turntable (1) is 60 mm to 100 mm, and the length of the column (4) located below the turntable (1) is 20 mm to 50 mm.

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