Numerical control hobbing machine for processing inner teeth of a gear ring

Abstract

The application discloses a numerical control gear hobbing machine for processing inner gear of a gear ring, and relates to the technical field of gear ring processing machines. The numerical control gear hobbing machine comprises a shell, a machine body, a positioning device, a processing device and a cooling device. The shell is internally provided with a processing space. The machine body is fixedly arranged in the processing space. The positioning device comprises a supporting tray, a first driving element and a plurality of positioning components. The positioning components comprise positioning claws and second driving elements. The processing device comprises a rack, a cutter, a third driving element and a displacement component. The cooling device comprises a fixed water tank, a first cooling pipe, a movable water tank and a plurality of cooling components. The application can effectively inhibit vibration during processing of a large gear ring, and can make heat distribution of the large gear ring more uniform during processing, so as to effectively guarantee processing quality of the large gear ring.

Description

Technical Field

[0001] This application relates to the technical field of gear ring machining tools, and in particular to a CNC gear hobbing machine for machining the internal teeth of gear rings. Background Technology

[0002] Gear hobbing machines are the most widely used machine tools in gear ring machining, and their continuous cutting characteristics have gradually made them the mainstream. However, when machining large gear rings (such as wind turbine gear rings), they still fall short in terms of machining accuracy, automation, and adaptability, and they face the challenge of large blank sizes and large allowances. Traditional gear ring machining methods, such as gear shaping and milling, have low machining efficiency and cannot meet the needs of large-volume production.

[0003] In recent years, the introduction of CNC technology has significantly improved the accuracy and flexibility of gear hobbing machines in machining gear rings, but there are still technical challenges in machining large gear rings.

[0004] While dedicated CNC gear hobbing machines can automate the machining of large gear rings, they lack sufficient cutting force distribution and thermal deformation compensation. This means that vibration and uneven heat distribution are prone to occur during the machining of large gear rings, which affects the machining accuracy and, consequently, the machining quality of large-sized products. Summary of the Invention

[0005] This application provides a CNC gear hobbing machine for machining the internal teeth of a gear ring, which can effectively suppress vibration during the machining process of a large gear ring, and at the same time make the heat distribution of the large gear ring more uniform during the machining process, so as to effectively ensure the machining quality of the large gear ring.

[0006] This application provides a CNC gear hobbing machine for machining internal gears of a gear ring, employing the following technical solution:

[0007] A CNC gear hobbing machine for machining internal gears of a gear ring includes a housing, a machine body, a positioning device, a machining device, and a cooling device;

[0008] The interior of the housing has a processing space and an inlet / outlet communicating with the processing space is provided on one side. A door panel for controlling the opening and closing of the inlet / outlet is movably installed on one side of the housing.

[0009] The machine body is fixedly installed in the processing space, and the positioning device, the processing device and the cooling device are all installed on the top of the machine body;

[0010] The positioning device includes a support tray, a first driving member, and multiple positioning components; the support tray is rotatably mounted on the top of the machine body, and its rotation axis is vertical and coincides with its own axis; the first driving member is disposed on the machine body and is used to drive the support tray to rotate;

[0011] The positioning assembly is arranged on the top of the supporting tray, and a plurality of the positioning assemblies are arranged in a circumferential array with the axis of the supporting tray as the axis; the positioning assembly comprises a positioning claw and a second driving member for driving the positioning claw to move in the radial direction of the supporting tray, and the positioning space is enclosed by a plurality of the positioning claws;

[0012] The processing device comprises a frame, a cutter, a third driving member and a displacement assembly; the frame is arranged above the supporting tray and movably connected with the machine body, and the displacement assembly is used for driving the frame to displace; the cutter is rotationally connected with the frame, the rotation axis of the cutter coincides with the axis of the cutter and is perpendicular to the rotation axis of the supporting tray, and the third driving member is arranged on the frame and used for driving the cutter to rotate;

[0013] The cooling device comprises a fixed water tank, a first cooling pipe, a movable water tank and a plurality of cooling assemblies; the fixed water tank is arranged on the frame; the first cooling pipe is arranged on the frame and located at one side of the cutter, one end of the first cooling pipe is connected with the fixed water tank, and the other end of the first cooling pipe is used for spraying cooling liquid towards the position close to the cutter;

[0014] The movable water tank is arranged on the supporting tray, and a plurality of the cooling assemblies correspond to a plurality of the positioning assemblies; the cooling assembly comprises a second cooling pipe, one end of the second cooling pipe is connected with the movable water tank, and the other end of the second cooling pipe is connected with the top of the positioning claw and used for spraying cooling liquid towards the edge of the positioning space.

[0015] By adopting the above technical scheme, the large gear ring can be processed with more stable positioning state, so as to effectively inhibit the vibration in the processing of the large gear ring; at the same time, the cutter and the large gear ring can be fully cooled during processing, so that the heat distribution of the large gear ring during processing is more uniform, thereby effectively ensuring the processing quality of the large gear ring.

[0016] Optionally, the positioning device further comprises a lifting assembly;

[0017] The lifting assembly is arranged on the top of the supporting tray, and comprises a lifting member and a fourth driving member; the lifting member has a space for giving way in the inside, and is movably connected with the supporting tray and the moving direction of the lifting member is parallel to the axis of the supporting tray; the fourth driving member is arranged on the supporting tray and used for driving the lifting member to move.

[0018] By adopting the above technical scheme, the cutter can conveniently process the inner teeth of the large gear ring, and the cooling liquid and the debris can be conveniently concentrated in the space for giving way to reduce the influence of the debris and the cooling liquid on the outside.

[0019] Optionally, the top of the positioning claw extends a limiting part towards the side close to the positioning space, and the limiting part is above the lifting member.

[0020] By adopting the technical scheme, the large gear ring can further improve the position stability after being positioned by the cooperation of the positioning assembly and the lifting assembly, and further inhibit the influence of vibration of the large gear ring in the machining process, so as to ensure the machining precision of the large gear ring.

[0021] Optionally, a plurality of drainage holes for draining the cooling liquid are formed in the lifting member, and two ends of the drainage holes are communicated with the accommodation space and the outside space of the lifting member respectively.

[0022] By adopting the technical scheme, the concentrated cooling liquid in the accommodation space can be conveniently drained, so as to avoid the influence caused by excessive concentration of the cooling liquid in the accommodation space.

[0023] Optionally, the lifting assembly further comprises a movable disc, a plurality of intercepting members and a plurality of elastic members.

[0024] The movable disc is movably arranged on the lifting member and located in the accommodation space, and the moving direction of the movable disc is parallel to the moving direction of the lifting member; the intercepting members are fixedly arranged on the top of the supporting disc and used for intercepting the debris, and a plurality of cooperating openings matched with the intercepting members are formed in the movable disc.

[0025] When the movable disc is moved upward to the limit position, the top of the intercepting members is flush with the top end surface of the movable disc; the two ends of the elastic members are connected with the movable disc and the lifting member respectively, and the elastic members have a tendency to drive the movable disc to move upward to the limit position and remain.

[0026] By adopting the technical scheme, the movable disc is used for receiving the cooling liquid and the debris, when the cooling liquid is concentrated in the accommodation space, the movable disc will move downward against the force of the elastic members, so that the intercepting members are extended to intercept the debris, thereby facilitating the effect that the cooling liquid flows out and the debris continues to be collected in the accommodation space.

[0027] Optionally, the top of the movable disc has a flared upward recess;

[0028] When the movable disc is moved upward to the limit position, the top of the intercepting members is flush with the groove wall end surface of the bottom of the recess, and the movable disc blocks the plurality of drainage holes; after the movable disc is moved downward, the drainage holes are communicated with the space above the movable disc.

[0029] By adopting the technical scheme, the scraps can be conveniently concentrated at the center of the giving space, the probability of the scraps flowing out with the cooling liquid is reduced, and thus the reliability of the effect of realizing the flowing out of the cooling liquid and the collection of the scraps in the giving space can be further improved.

[0030] Optionally, the intercepting member is in an arc strip structure, the arc opening of which faces the axis of the supporting tray, and there is a spacing between adjacent intercepting members.

[0031] By adopting the technical scheme, the probability of the scraps flowing out with the cooling liquid can be further reduced, and the subsequent worker can conveniently clean the scraps in the giving space.

[0032] Optionally, the movable water tank is in a ring structure and is distributed along the edge of the top of the supporting tray; a water collecting groove is formed in the position close to the movable water tank on the top of the supporting tray, and the cooling liquid collected in the water collecting groove is recycled by the movable water tank.

[0033] By adopting the technical scheme, the probability of the cooling liquid leaving the supporting tray can be reduced, and the outflowing cooling liquid can be conveniently recycled.

[0034] Optionally, the first cooling pipe sprays the cooling liquid towards the positioning space.

[0035] By adopting the technical scheme, the cooling liquid can be further conveniently concentrated in the giving space, the scraps can be conveniently washed into the giving space by the cooling liquid, and the cooling liquid sprayed by the first cooling pipe can cool and heat the large gear ring.

[0036] Optionally, the cooling assembly further comprises a pressing member; the second cooling pipe is elastic, and the pressing member is movably arranged on the positioning claw and used for pressing the corresponding second cooling pipe.

[0037] The machine body is provided with a push block below the frame body; during the movement of the positioning claw with the rotation of the supporting tray, when the positioning claw moves to the position close to the frame body, the push block contacts the corresponding pressing member and drives the pressing member to press the corresponding second cooling pipe.

[0038] By adopting the technical scheme, the second cooling pipe close to the machining position can have a stronger cooling and heating effect on the large gear ring, so that the heat distribution of the large gear ring during machining is more uniform, so as to ensure the machining quality.

[0039] In summary, the present application has at least one of the following beneficial effects:

[0040] 1. It can effectively improve the positional stability of large gear rings during the machining process, thereby effectively suppressing vibration during the machining process and improving the machining quality of large gear rings;

[0041] 2. It can fully cool down the large gear ring during the processing, thereby making the heat distribution of the large gear ring more uniform and improving the processing quality of the large gear ring;

[0042] 3. It can collect and screen the debris and sprayed coolant generated during the machining of large gear rings, which facilitates the recycling of coolant and the centralized treatment of debris. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of a CNC gear hobbing machine for machining the internal teeth of a gear ring according to an embodiment of this application;

[0044] Figure 2 This is a partial structural schematic diagram of a CNC gear hobbing machine for machining the internal teeth of a gear ring according to an embodiment of this application (shell omitted);

[0045] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0046] Figure 4 This is a partial sectional view of the structure of a CNC gear hobbing machine for machining the internal gears of a gear ring according to an embodiment of this application (shell omitted).

[0047] Figure 5 This is a cross-sectional view of the structure above the body in an embodiment of this application.

[0048] Explanation of reference numerals in the attached drawings: 1. Shell; 11. Processing space; 12. Inlet / outlet; 13. Door panel; 2. Body; 21. Boss; 22. Push block; 3. Positioning device; 31. Support tray; 311. Protrusion; 312. Water collection tank; 32. First driving component; 33. Positioning assembly; 331. Positioning claw; 3311. Limiting part; 332. Second driving component; 34. Lifting assembly; 341. Lifting component; 3411. Drainage hole; 342. Fourth driving component 343, movable plate; 3431, mating port; 3432, groove; 344, interceptor; 345, elastic element; 4, processing device; 41, frame; 42, cutting tool; 43, third drive element; 44, moving component; 5, cooling device; 51, fixed water tank; 52, first cooling pipe; 53, movable water tank; 54, cooling component; 541, second cooling pipe; 542, extrusion part; 6, large gear ring; 7, positioning space; 8, clearance space. Detailed Implementation

[0049] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0050] Referring to Figure 1 and Figure 2 , the embodiment of the present application discloses a numerical control gear hobbing machine for processing inner teeth of a large gear ring 6, which comprises a shell 1, a machine body 2, a positioning device 3, a processing device 4 and a cooling device 5. Wherein, the shell 1 provides a separate space for processing the large gear ring 6; the machine body 2 is used for supporting the large gear ring and as a mounting carrier for other devices; the positioning device 3 is used for fixing the large gear ring at a fixed position on the machine body 2; the processing device 4 is used for processing the inner teeth of the large gear ring 6; and the cooling device 5 is used for cooling the large gear ring 6 and the processing device 4 during the processing.

[0051] The inside of the shell 1 has a processing space 11 for processing the inner teeth of the large gear ring 6, and the machine body 2 is fixedly installed inside the shell 1 and at the bottom of the processing space 11; one side of the shell 1 is provided with an entrance and exit 12 for the workers to move the large gear ring 6 in and out of the processing space 11, so that the processing space 11 can be communicated with the outside world; and a door plate 13 for controlling the opening and closing of the entrance and exit 12 is movably installed on the outside of the shell 1, so as to facilitate the workers to control whether the processing space 11 is communicated with the outside world according to the needs. In the embodiment, the shell 1 is preferably in the form of a cuboid, and the door plate 13 is preferably rotatably connected with the shell 1 and has a vertical rotation axis, and when the door plate 13 is rotated to the limit position towards the entrance and exit 12, it can be fixed relative to the shell 1 and form a sealed space inside the shell 1. Since the door plate 13 having the above-mentioned effect is a common prior art, it will not be described here in detail, and only a brief representation is made in the drawings.

[0052] The machine body 2 is in the form of a cuboid, and is fixedly installed inside the shell 1 in a vertical position with the height direction, and the positioning device 3, the processing device 4 and the cooling device 5 are all installed on the top of the machine body 2. In the embodiment, the machine body 2 and the large gear ring 6 are both kept a distance from the inner wall of the processing space 11 after being installed in the processing space 11 and on the machine body 2.

[0053] Referring to Figure 3 and Figure 4 , the positioning device 3 comprises a supporting disc 31, a first driving member 32, a plurality of positioning assemblies 33 and a lifting assembly 34.

[0054] The supporting disc 31 is in the form of a disc, and is rotatably installed on the top of the machine body 2, with the rotation axis coinciding with the axis of the supporting disc 31 and parallel to the height direction of the machine body 2. In the embodiment, the axis of the supporting disc 31 is preferably coincided with the vertical center line of the machine body 2, i.e. the supporting disc 31 is centrally positioned on the top of the machine body 2.

[0055] The first driving member 32 is fixedly installed inside the machine body 2, and is used to drive the supporting tray 31 to rotate relative to the machine body 2. In the embodiment, the first driving member 32 is preferably a servo motor. Since the servo motor is a common prior art, no further description is made herein, and only a brief representation is made in the drawings.

[0056] The positioning assembly 33 is installed on the top of the supporting tray 31. A plurality of positioning assemblies 33 are distributed on the supporting tray 31 in a circumferential array with the axis of the supporting tray 31 as the axis, and the positioning assemblies 33 are distributed on the supporting tray 31 at positions close to the outer side of the supporting tray 31. In the embodiment, the positioning device 3 preferably includes four positioning assemblies 33.

[0057] The positioning assembly 33 includes a positioning claw 331 and a second driving member 332. The top of the supporting tray 31 extends upwardly with an annular protrusion 311, and the protrusion 311 is distributed along the outer circumferential track of the supporting tray 31. The second driving member 332 is fixedly installed on the top of the protrusion 311, the positioning claw 331 is installed on the side of the second driving member 332 close to the axis of the supporting tray 31, and the second driving member 332 can drive the positioning claw 331 to move along the radial direction of the supporting tray 31. The four positioning claws 331 form a positioning space 7 above the supporting tray 31 for clamping and positioning the large gear ring 6, and after the large gear ring 6 is clamped and positioned, the positioning claw 331 abuts against the end face of the large gear ring 6. In the embodiment, the positioning claw 331 is preferably an arc-shaped plate structure matched with the outer circumferential surface of the large gear ring 6, and the arc opening of the arc-shaped plate structure faces the axis of the supporting tray 31. The second driving member 332 is preferably a servo cylinder, which drives the positioning claw 331 to move along a track intersecting with the axis of the supporting tray 31, and the four second driving members 332 drive the corresponding positioning claws 331 to move synchronously and in the same direction. Since the servo cylinder having the above functions is a common prior art, no further description is made herein, and only a brief representation is made in the drawings.

[0058] The lifting assembly 34 includes a lifting member 341 and a fourth driving member 342.

[0059] The lifting member 341 is in the form of an annular structure, and is movably installed on the top of the supporting tray 31. The moving direction of the lifting member 341 is parallel to the axis of the lifting member 341, and the axis of the lifting member 341 coincides with the axis of the supporting tray 31. The inside of the lifting member 341 surrounds the positioning space 8 above the supporting tray 31. The fourth driving member 342 is fixedly installed inside the supporting tray 31, and is used to drive the lifting member 341 to move relative to the supporting tray 31. In the embodiment, the fourth driving member 342 is preferably a servo cylinder.

[0060] The top of the positioning claw 331 extends towards the positioning space 7 with a limiting part 3311, and the limiting part 3311 is located above the lifting member 341. When the large gear ring 6 is fixed on the machine body 2 by the positioning device 3, the top of the large gear ring 6 will contact and abut with the four limiting parts 3311, and the bottom of the large gear ring 6 will contact and abut with the top of the lifting member 341. At this time, the large gear ring 6 is clamped and positioned by the four positioning claws 331 and also clamped and positioned between the limiting part 3311 and the lifting member 341, which improves the stability of the large gear ring 6 after positioning, ensuring that its axis coincides with the axis of the support tray 31.

[0061] The top of the machine body 2 extends upward from one side of the support tray 31 with a boss 21, and the processing device 4 is mounted on the boss 21 and located above the support tray 31.

[0062] Reference Figure 2 and Figure 3 The processing device 4 includes a frame 41, a cutting tool 42, a third drive component 43, and a moving component 44.

[0063] The frame 41 is movably mounted on the boss 21, and the moving component 44 is mounted on the boss 21 and is used to drive the frame 41 to move relative to the boss 21. In this embodiment, preferably, the moving component 44 can drive the frame 41 to move relative to the boss 21 along the length, width, and height directions parallel to the body 2, thereby controlling the position of the frame 41. Since the moving component 44 with the above functions is common prior art, it will not be described in detail here, and it is only briefly shown in the accompanying drawings.

[0064] The cutting tool 42 has a cylindrical structure and is rotatably mounted on the frame 41. Its rotation axis coincides with its own axis and is perpendicular to the rotation axis of the support tray 31. The third drive unit 43 is fixedly mounted on the frame 41 and is used to drive the cutting tool 42 to rotate relative to the frame 41. In this embodiment, the third drive unit 43 is preferably a servo motor; and preferably, during the process of the rotating cutting tool 42 cutting the large gear ring 6, the frame 41 maintains a distance from the large gear ring 6 and other structures.

[0065] Reference Figure 3 and Figure 4 The cooling device 5 includes a fixed water tank 51, a first cooling pipe 52, a movable water tank 53, and multiple cooling components 54.

[0066] The fixed water tank 51 has a rectangular structure and is fixedly installed on the frame 41. It has an internal space for storing coolant. One end of the first cooling pipe 52 is fixedly installed on the frame 41, and the other end is fixedly connected to the fixed water tank 51. The end of the first cooling pipe 52 near the fixed water tank 51 communicates with the interior of the fixed water tank 51, while the end of the first cooling pipe 52 away from the fixed water tank 51 faces the cutter 42, and its spraying direction is inclined downwards towards the clearance space 8. This facilitates the cooling of the cutter 42 after the coolant sprays, allowing part of it to contact the large gear ring 6 and enter the clearance space 8. In this embodiment, since the first cooling pipe 52 with the above-mentioned functions is common prior art, it will not be described in detail here, and it is only briefly shown in the accompanying drawings.

[0067] The movable water tank 53 has an overall annular structure. It is fixedly installed on the support tray 31 with its axis coinciding with the axis of the support tray 31, and its interior also has space for storing coolant. In this embodiment, the movable water tank 53 is preferably located inside the protrusion 311 and abuts against the protrusion 311, and the movable water tank 53 is located below the four second drive members 332.

[0068] Multiple cooling components 54 correspond one-to-one with multiple positioning components 33. The cooling component 54 includes a second cooling pipe 541 and an extrusion component 542.

[0069] One end of the second cooling pipe 541 is fixedly connected to the movable water tank 53 and communicates with the interior of the movable water tank 53. The other end of the second cooling pipe 541 passes through the corresponding positioning claw 331 and is fixedly connected to the corresponding positioning claw 331. The end of the second cooling pipe 541 away from the movable water tank 53 extends out of the corresponding limiting part 3311 and can spray coolant in a direction close to the positioning space 7. In this embodiment, the second cooling pipe 541 is preferably a flexible hose. Since the second cooling pipe 541 with the above functions is common prior art, it will not be described in detail here, and it is only briefly shown in the accompanying drawings.

[0070] The extrusion member 542 is movably mounted on the top of the corresponding positioning claw 331. During its movement relative to the corresponding positioning claw 331, the extrusion member 542 can extrude the end of the corresponding second cooling pipe 541 away from the movable water tank 53, thereby changing the speed at which the corresponding second cooling pipe 541 sprays coolant. In this embodiment, preferably, the extrusion member 542 is movably connected to the corresponding positioning claw 331 along a direction parallel to the axis of the support tray 31. Furthermore, without external force, the extrusion member 542 can maintain its movement to its limit position in the direction away from the corresponding second cooling pipe 541 under the elastic force of the second cooling pipe 541, at which point the speed at which the second cooling pipe 541 sprays coolant is at its slowest.

[0071] The machine body 2 has a push block 22 fixedly mounted on the boss 21 for pushing the extrusion piece 542 relative to the positioning claw 331, and the push block 22 is located below the frame 41. As the positioning claw 331 rotates with the support tray 31 toward the position closer to the cutter 42, the corresponding extrusion piece 542 will move toward the push block 22. As the corresponding positioning claw 331 moves past the push block 22, the push block 22 will push the extrusion piece 542 downward to squeeze the corresponding second cooling pipe 541, so that the spray cooling effect of the second cooling pipe 541 on the large gear ring 6 is stronger, and the cooling effect on the large gear ring 6 near the cutting position of the cutter 42 is stronger, so that the heat distribution of the large gear ring 6 is more uniform.

[0072] During the machining of the internal teeth of the large gear ring 6, the coolant sprayed by the cooling device 5 not only cools the cutting tool 42 and the large gear ring 6, but also drives the generated debris into the clearance space 8 for concentration.

[0073] The lifting member 341 has multiple drain holes 3411 evenly distributed around its periphery for coolant discharge. The two ends of the drain holes 3411 are connected to the clearance space 8 and the outer space of the lifting member 341, respectively. The multiple drain holes 3411 are arranged in a circular array on the lifting member 341 with the axis of the lifting member 341 as the axis.

[0074] The tray 31 has a water collection trough 312 for collecting coolant at its top near the outer side. The water collection trough 312 has a ring structure and an opening at the top of the tray 31 for coolant to enter. The axis of the water collection trough 312 coincides with the axis of the tray 31. In this embodiment, the water collection trough 312 is preferably located inside the movable water tank 53, and the movable water tank 53 preferably has a pipe extending outward to allow the coolant in the water collection trough 312 to enter its own interior, so as to recycle the coolant collected in the water collection trough 312. Since the pipes that achieve the above function are common existing technologies, they will not be described in detail here, and are only briefly shown in the accompanying drawings.

[0075] Reference Figure 2 and Figure 4 Furthermore, the lifting assembly 34 also includes a movable disc 343, multiple interceptors 344, and several elastic elements 345.

[0076] Reference Figure 4 and Figure 5The movable disc 343 has a circular structure and is installed inside the lifting component 341 and movably connected to it. Its axis coincides with the axis of the lifting component 341, and its direction of movement is parallel to its own axis. The movable disc 343 has restrictions on its movement relative to the lifting component 341. When the movable disc 343 moves upward to its limit position, it simultaneously blocks one end of multiple drainage holes 3411 near the clearance space 8. When the movable disc 343 moves downward to its limit position, the ends of multiple drainage holes 3411 near the clearance space 8 are fully connected to the clearance space 8.

[0077] The elastic element 345 is installed inside the lifting member 341, with its two ends fixedly connected to the movable disk 343 and the lifting member 341 respectively. It has a tendency to drive the movable disk 343 upward relative to the lifting member 341 to its limit position and maintain that position. In this embodiment, the elastic element 345 is preferably a compression spring, and preferably the lifting assembly 34 includes one elastic element 345.

[0078] The top of the movable disk 343 has a groove 3432 for collecting debris, and the groove 3432 is flared upwards. The interceptor 344 has an overall arc-shaped structure, its bottom is fixedly connected to the support tray 31, and its arc opening faces the axis of the movable disk 343; the movable disk 343 has multiple mating ports 3431 that are adapted to the interceptor 344 through it in the vertical direction, and the two ends of the mating ports 3431 are respectively connected to the groove 3432 and the space in the clearance space 8 located below the movable disk 343; when the top of the interceptor 344 enters the corresponding mating port 3431, the interceptor 344 can block the corresponding mating port 3431. In this embodiment, it is preferable that the arc trajectory of the interceptor 344 is an arc and the axis of its arc trajectory coincides with the axis of the movable disk 343, and it is preferable that there is a gap between adjacent interceptors 344 for coolant flow.

[0079] When the movable disc 343 moves upward to its limit position relative to the lifting member 341, the top of the intercepting member 344 is flush with the end face of the groove wall at the bottom of the groove 3432. The coolant and debris entering the clearance space 8 accumulate above the movable disc 343. When the coolant and debris accumulate to a certain amount above the movable disc 343, their weight will drive the movable disc 343 to move downward against the force of the elastic member 345. When the movable disc 343 moves downward to its limit position relative to the lifting member 341, the ends of the multiple intercepting members 344 will be located in the groove 3432 to intercept debris and reduce the probability of debris being discharged with the coolant through the drain hole 3411. Finally, the debris will gather in the groove 3432, making it easier for the staff to handle it later.

[0080] The implementation principle of a CNC gear hobbing machine for machining internal gears of a gear ring according to an embodiment of this application is as follows:

[0081] After the worker clamps and positions the large gear ring 6 on the machine body 2 using the positioning device 3, he leaves the processing space 11 and closes the door panel 13. Then, the worker uses the program to control the processing device 4 and the cooling device 5 to perform internal gear processing on the large gear ring 6.

[0082] During the internal gear machining process, the first cooling pipe 52 continuously sprays coolant onto the tool 42, and multiple second cooling pipes 541 continuously spray coolant onto the surface of the large gear ring 6 to control the temperature of the tool 42 and the large gear ring 6 during the machining process. During the spraying of coolant, the coolant can be concentrated in the clearance space 8, and at the same time, it can drive the generated debris to be concentrated in the clearance space 8, which is convenient for the coolant to be recycled and reused, and also makes it convenient for the staff to uniformly handle the debris in the future.

[0083] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A CNC gear hobbing machine for machining internal gears of a gear ring, characterized in that, It includes a shell (1), a body (2), a positioning device (3), a processing device (4), and a cooling device (5); The housing (1) has a processing space (11) inside and an inlet (12) communicating with the processing space (11) is provided on one side. A door panel (13) for controlling the opening and closing of the inlet (12) is movably installed on one side of the housing (1). The machine body (2) is fixedly installed in the processing space (11), and the positioning device (3), the processing device (4) and the cooling device (5) are all installed on the top of the machine body (2); The positioning device (3) includes a support tray (31), a first driving member (32), and multiple positioning components (33); the support tray (31) is rotatably mounted on the top of the body (2), and its rotation axis is vertical and coincides with its own axis; the first driving member (32) is disposed on the body (2) and is used to drive the support tray (31) to rotate. The positioning component (33) is disposed on the top of the support tray (31), and a plurality of the positioning components (33) are arranged in a circular array with the axis of the support tray (31) as the axis; the positioning component (33) includes a positioning claw (331) and a second driving member (332), the second driving member (332) is used to drive the positioning claw (331) to move along the radial direction of the support tray (31), and a positioning space (7) is formed by the plurality of positioning claws (331). The processing device (4) includes a frame (41), a cutting tool (42), a third driving member (43), and a displacement assembly; the frame (41) is located above the support tray (31) and is movably connected to the machine body (2), and the displacement assembly is used to drive the frame (41) to move; the cutting tool (42) is rotatably connected to the frame (41), its rotation axis coincides with its own axis and is perpendicular to the rotation axis of the support tray (31), and the third driving member (43) is disposed on the frame (41) and is used to drive the cutting tool (42) to rotate; The cooling device (5) includes a fixed water tank (51), a first cooling pipe (52), a movable water tank (53), and multiple cooling components (54); the fixed water tank (51) is mounted on the frame (41); the first cooling pipe (52) is mounted on the frame (41) and located on one side of the cutter (42), one end of the first cooling pipe (52) is connected to the fixed water tank (51), and the other end is used to spray coolant towards the position near the cutter (42); The movable water tank (53) is set on the support tray (31), and the multiple cooling components (54) correspond one-to-one with the multiple positioning components (33). The cooling component (54) includes a second cooling pipe (541), one end of the second cooling pipe (541) is connected to the movable water tank (53), and the other end of the second cooling pipe (541) is connected to the top of the positioning claw (331) and is used to spray coolant toward the edge of the positioning space (7). The positioning device (3) also includes a lifting assembly (34); The lifting assembly (34) is disposed on the top of the support tray (31), and includes a lifting member (341) and a fourth driving member (342); the lifting member (341) has a clearance space (8) inside, which is movably connected to the support tray (31) and its direction of movement is parallel to the axis of the support tray (31); the fourth driving member (342) is disposed on the support tray (31) and is used to drive the lifting member (341) to move; The lifting component (341) is provided with a plurality of drain holes (3411) for draining coolant, and the two ends of the drain holes (3411) are respectively connected to the clearance space (8) and the outer space of the lifting component (341). The lifting assembly (34) also includes a movable plate (343), multiple interceptors (344), and several elastic elements (345). The movable disc (343) is movably mounted on the lifting member (341) and located in the clearance space (8), and its movement direction is parallel to the movement direction of the lifting member (341); the intercepting member (344) is fixedly mounted on the top of the support tray (31) and is used to intercept debris, and the movable disc (343) has a plurality of mating ports (3431) adapted to the intercepting member (344). When the movable disk (343) moves upward to its limit position, the tops of the multiple interceptors (344) are flush with the top end face of the movable disk (343); the two ends of the elastic member (345) are connected to the movable disk (343) and the lifting member (341) respectively, and it has the tendency to drive the movable disk (343) to move upward to its limit position and maintain it.

2. The CNC gear hobbing machine for machining internal gears of a gear ring according to claim 1, characterized in that, The top of the positioning claw (331) extends a limiting portion (3311) toward the side close to the positioning space (7), and the limiting portion (3311) is located above the lifting member (341).

3. The CNC gear hobbing machine for machining internal gears of a gear ring according to claim 1, characterized in that, The top of the movable disk (343) has an upwardly flared groove (3432). When the movable disc (343) moves upward to its limit position, the top of the interceptor (344) is flush with the end face of the groove wall at the bottom of the groove (3432), and the movable disc (343) blocks the multiple drainage holes (3411); after the movable disc (343) moves downward, the drainage holes (3411) communicate with the space above the movable disc (343).

4. A CNC gear hobbing machine for machining internal gears of a gear ring according to claim 1, characterized in that, The interceptor (344) has an arc-shaped strip structure with its arc opening facing the axis of the support tray (31), and there is a gap between adjacent interceptors (344).

5. A CNC gear hobbing machine for machining internal gears of a gear ring according to claim 1, characterized in that, The movable water tank (53) has a ring structure and is distributed along the edge of the top of the support tray (31); a water collection trough (312) is provided on the top of the support tray (31) near the movable water tank (53), and the coolant collected in the water collection trough (312) is recycled by the movable water tank (53).

6. A CNC gear hobbing machine for machining internal gears of a gear ring according to claim 1, characterized in that, The first cooling pipe (52) sprays coolant in the direction of the positioning space (7).

7. A CNC gear hobbing machine for machining internal gears of a gear ring according to claim 1, characterized in that, The cooling assembly (54) further includes an extruder (542); the second cooling tube (541) is elastic, and the extruder (542) is movably disposed on the positioning claw (331) and used to extrude the corresponding second cooling tube (541). The body (2) has a push block (22) below the frame (41). As the positioning claw (331) moves with the rotating tray (31), when the positioning claw (331) moves to a position close to the frame (41), the push block (22) contacts the corresponding extruder (542) and drives it to extrude the corresponding second cooling pipe (541).

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