Numerical control gear hobbing machine for machining inner teeth of gear ring

Abstract

The invention discloses a numerical control gear hobbing machine for gear ring inner tooth machining, and relates to the technical field of gear ring machining machine tools. The numerical control gear hobbing machine comprises a shell, a machine body, a positioning device, a machining device and a cooling device; a processing space is formed in the shell; the machine body is fixedly arranged in the processing space; the positioning device comprises a bearing disc, a first driving piece and a plurality of positioning assemblies; the positioning assembly comprises a positioning claw and a second driving piece; the machining device comprises a frame body, a cutter, a third driving piece and a displacement assembly. The cooling device comprises a fixed water tank, a first cooling pipe, a movable water tank and a plurality of cooling assemblies. Vibration in the large gear ring machining process can be effectively restrained, meanwhile, heat distribution of the large gear ring in the machining process can be more uniform, and the machining quality of the large gear ring is effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gear ring machining machine tools, in particular to a numerical control gear hobbing machine for gear ring inner tooth machining. BACKGROUND

[0002] Gear hobbing machine is the most widely used machine tool in gear ring machining machine tools, and gradually becomes the mainstream due to its continuous cutting characteristics. When large gear rings (such as wind power gear rings) need to be machined, there are still some deficiencies in machining precision, automation level and adaptability, and it will face the challenges of large blank size and large excess amount. The traditional gear ring machining methods such as gear shaping and gear milling have low machining efficiency and are difficult to meet the production demand of large quantities.

[0003] In recent years, the introduction of numerical control technology has significantly improved the precision and flexibility of gear hobbing machine machining gear rings, but there are still technical difficulties in machining large gear rings.

[0004] When a special numerical control gear hobbing machine is used to machine large gear rings, although automation can be achieved, the cutting force distribution and thermal deformation compensation of large gear rings are insufficient, that is, vibration and uneven heat distribution are prone to occur during the machining of large gear rings, thereby affecting the machining precision of large gear rings and further affecting the machining quality of large size. SUMMARY

[0005] The present application provides a numerical control gear hobbing machine for gear ring inner tooth machining, which can effectively suppress vibration during the machining of large gear rings, and can also make the heat distribution of large gear rings more uniform during the machining process, so as to effectively ensure the machining quality of large gear rings.

[0006] The present application provides a numerical control gear hobbing machine for gear ring inner tooth machining, which adopts the following technical scheme: A numerical control gear hobbing machine for gear ring inner tooth machining, comprising a shell, a machine body, a positioning device, a machining device and a cooling device; The inside of the shell has a machining space and one side is provided with an inlet and outlet communicating with the machining space, and one side of the shell is movably provided with a door plate for controlling the opening and closing of the inlet and outlet; The machine body is fixedly arranged in the machining space, and the positioning device, the machining device and the cooling device are arranged on the top of the machine body; The positioning device comprises a supporting tray, a first driving member and a plurality of positioning assemblies; the supporting tray is rotatably installed on the top of the machine body, and the rotation axis is vertical and coincides with the axis of the supporting tray; the first driving member is arranged on the machine body and is used to drive the rotation of the supporting tray; 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; 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; 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; 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.

[0007] 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 the processing, so that the heat distribution of the large gear ring during the processing is more uniform, thereby effectively ensuring the processing quality of the large gear ring.

[0008] Optionally, the positioning device further comprises a lifting assembly; 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 displacement space 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.

[0009] 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 displacement space to reduce the influence of the debris and the cooling liquid on the outside.

[0010] Optionally, the top of the positioning claw extends a limiting part towards the side close to the positioning space, and the limiting part is located above the lifting member.

[0011] 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.

[0012] Optionally, a plurality of drainage holes for draining the cooling liquid are formed on the lifting piece, and two ends of the drainage holes are communicated with the accommodation space and the outside space of the lifting piece, respectively.

[0013] 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.

[0014] Optionally, the lifting assembly further comprises a movable disc, a plurality of intercepting pieces and a plurality of elastic pieces. The movable disc is movably arranged on the lifting piece and located in the accommodation space, and the moving direction of the movable disc is parallel to the moving direction of the lifting piece; the intercepting pieces 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 pieces are formed on the movable disc. When the movable disc is moved upward to the limit position, the top of the intercepting pieces is flush with the top end surface of the movable disc; the two ends of the elastic pieces are connected with the movable disc and the lifting piece, respectively, and the elastic pieces have a tendency to drive the movable disc to move upward to the limit position and remain.

[0015] By adopting the technical scheme, the movable disc is used for receiving the cooling liquid and the debris, when a certain amount of cooling liquid is concentrated in the accommodation space, the movable disc will move downward against the action of the elastic pieces, so that the intercepting pieces extend to intercept the debris, thereby conveniently realizing the effect that the cooling liquid flows out and the debris continues to be collected in the accommodation space.

[0016] Optionally, the top of the movable disc has a flared groove upward; When the movable disc is moved upward to the limit position, the top of the intercepting pieces is flush with the groove wall end surface of the bottom of the groove, 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.

[0017] By adopting the technical scheme, the debris can be conveniently concentrated to the center position of the accommodation space, and the probability of the debris flowing out with the cooling liquid is reduced, so that the reliability of realizing the effect that the cooling liquid flows out and the debris continues to be collected in the accommodation space can be further improved.

[0018] 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.

[0019] By adopting the above technical scheme, the probability of the debris flowing out with the cooling liquid can be further reduced, and the subsequent worker can conveniently clean the debris in the accommodation space.

[0020] 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.

[0021] By adopting the above technical scheme, the probability of the cooling liquid leaving the supporting tray can be reduced, and the outflowing cooling liquid can be recycled.

[0022] Optionally, the direction in which the first cooling pipe sprays the cooling liquid faces the positioning space.

[0023] By adopting the above technical scheme, the cooling liquid can be further conveniently concentrated in the accommodation space, the debris can be conveniently caused to enter the accommodation space under the flushing of the cooling liquid, and the cooling liquid sprayed by the first cooling pipe can be used to cool and lower the temperature of the large gear ring.

[0024] 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 to press the corresponding second cooling pipe. The machine body is provided with a push block below the frame body, and when the positioning claw moves to the position close to the frame body in the process of moving with the rotating of the supporting tray, the push block is in contact with the corresponding pressing member and drives the pressing member to press the corresponding second cooling pipe.

[0025] By adopting the above technical scheme, the second cooling pipe close to the machining position can have a stronger cooling and temperature lowering effect on the large gear ring, so that the heat distribution of the large gear ring during machining can be more uniform, thereby ensuring the machining quality.

[0026] In summary, the present application has at least one of the following beneficial effects: 1. The position stability of the large gear ring during machining can be effectively improved, thereby effectively inhibiting the vibration of the large gear ring during machining and improving the machining quality of the large gear ring; 2. The large gear ring as a whole can be sufficiently cooled and lowered in temperature during machining, thereby making the heat distribution of the large gear ring during machining more uniform and improving the machining quality of the large gear ring; 3. Can collect and screen the debris and sprayed cooling liquid generated in the machining process of the large gear ring, facilitate the recycling of the cooling liquid, and facilitate the centralized treatment of the debris. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic diagram of a numerical control gear hobbing machine for machining inner teeth of a gear ring in an embodiment of the present application; Figure 2 is a partial structural schematic diagram (omitting the shell) of a numerical control gear hobbing machine for machining inner teeth of a gear ring in an embodiment of the present application; Figure 3 is Figure 2 is an enlarged view of A in FIG. 7; Figure 4 is a sectional view of a partial structure of a numerical control gear hobbing machine for machining inner teeth of a gear ring in an embodiment of the present application (omitting the shell); Figure 5 is a sectional view of a structure above the machine body in an embodiment of the present application.

[0028] Marker explanation: 1, shell; 11, machining space; 12, inlet and outlet; 13, door plate; 2, machine body; 21, boss; 22, push block; 3, positioning device; 31, supporting tray; 311, protrusion; 312, water collecting groove; 32, first driving member; 33, positioning assembly; 331, positioning claw; 3311, limiting part; 332, second driving member; 34, lifting assembly; 341, lifting member; 3411, drainage hole; 342, fourth driving member; 343, movable disc; 3431, matching mouth; 3432, groove; 344, intercepting member; 345, elastic member; 4, machining device; 41, frame body; 42, cutter; 43, third driving member; 44, moving assembly; 5, cooling device; 51, fixed water tank; 52, first cooling pipe; 53, movable water tank; 54, cooling assembly; 541, second cooling pipe; 542, extrusion member; 6, large gear ring; 7, positioning space; 8, accommodation space. DETAILED DESCRIPTION

[0029] The following will be described in detail in combination with the accompanying Figures 1-5 The present application is further described in detail.

[0030] Reference will be made to Figure 1 and Figure 2The embodiment of the application discloses a numerical control gear hobbing machine for processing inner teeth of a gear ring, which is used for processing inner teeth of a large gear ring 6 and comprises a shell 1, a machine body 2, a positioning device 3, a processing device 4 and a cooling device 5. 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 serves as a mounting carrier of 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 inner teeth of the large gear ring 6. The cooling device 5 is used for cooling and cooling down the large gear ring 6 and the processing device 4 during the processing.

[0031] The shell 1 has a processing space 11 for processing inner teeth of the large gear ring 6. The machine body 2 is fixedly installed in the interior of the shell 1 and located at the bottom of the processing space 11. An entrance and exit 12 for moving the large gear ring 6 in and out of the processing space 11 is formed in one side of the shell 1, so that the processing space 11 can be communicated with the outside. A door plate 13 for controlling opening and closing of the entrance and exit 12 is movably installed on the outside of the shell 1, so that the door plate 13 can be moved according to the requirement of workers to control whether the processing space 11 is communicated with the outside. In the embodiment, the shell 1 is preferably in the form of a cuboid. The door plate 13 is preferably rotationally connected with the shell 1 and the rotation axis thereof is vertical. When the door plate 13 is rotated to the limit position towards the entrance and exit 12, the door plate 13 can be fixed relative to the shell 1 and a closed space is formed in the interior of the shell 1. Since the door plate 13 having the above-mentioned effect is a common prior art, the door plate 13 will not be described here again and only a brief representation of the door plate 13 is shown in the drawings.

[0032] The machine body 2 is in the form of a cuboid and is fixedly installed in the interior of the shell 1 in a vertical position with the height direction. 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.

[0033] 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.

[0034] The supporting disc 31 is in the form of a disc and is rotationally installed on the top of the machine body 2. The rotation axis of the supporting disc 31 coincides with the axis of the supporting disc 31 and is parallel to the height direction of the machine body 2. In the embodiment, the axis of the supporting disc 31 coincides with the vertical center line of the machine body 2, that is, the supporting disc 31 is centrally located on the top of the machine body 2.

[0035] 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.

[0036] The positioning assembly 33 is installed on the top of the supporting tray 31, and 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.

[0037] 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, the track of the servo cylinder for driving the positioning claw 331 to move intersects 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 with the above functions is a common prior art, no further description is made herein, and only a brief representation is made in the drawings.

[0038] The lifting assembly 34 includes a lifting member 341 and a fourth driving member 342.

[0039] 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.

[0040] The top of the positioning claw 331 extends a limiting part 3311 towards the direction of the positioning space 7, and the limiting part 3311 is above the lifting piece 341. When the positioning device 3 fixes the large gear ring 6 on the machine body 2, the top of the large gear ring 6 will be in contact with the four limiting parts 3311, and the bottom of the large gear ring 6 will be in contact with the top of the lifting piece 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 piece 341, thereby improving the stability of the large gear ring 6 after positioning, that is, the stability of keeping the axis of the large gear ring 6 coinciding with the axis of the bearing tray 31.

[0041] The top of the machine body 2 extends a boss 21 upwards on one side of the bearing tray 31, and the machining device 4 is installed on the boss 21 and above the bearing tray 31.

[0042] Referring to Figure 2 and Figure 3 , the machining device 4 comprises a frame 41, a cutter 42, a third driving piece 43 and a moving assembly 44.

[0043] The frame 41 is movably installed on the boss 21, and the moving assembly 44 is installed on the boss 21 and used to drive the frame 41 to move relative to the boss 21. In the embodiment, the moving assembly 44 can drive the frame 41 to move relative to the boss 21 along the length direction, the width direction and the height direction of the machine body 2, so as to control the position of the frame 41. Since the moving assembly 44 having the above function is a common prior art, it will not be described here, and only a brief representation is made in the drawings.

[0044] The cutter 42 is in a cylindrical structure as a whole, and is rotatably installed on the frame 41, with the rotation axis coinciding with the axis of the cutter 42 and being perpendicular to the rotation axis of the bearing tray 31. The third driving piece 43 is fixedly installed on the frame 41 and used to drive the cutter 42 to rotate relative to the frame 41. In the embodiment, the third driving piece 43 is preferably a servo motor. In the process of cutting the large gear ring 6 by the rotating cutter 42, the frame 41 keeps a distance from the large gear ring 6 and other structures.

[0045] Referring to Figure 3 and Figure 4 , the cooling device 5 comprises a fixed water tank 51, a first cooling pipe 52, a movable water tank 53 and a plurality of cooling assemblies 54.

[0046] The fixed water tank 51 is in the shape of a cuboid, is fixedly installed on the frame body 41, and has a space for storing cooling liquid inside. One end of the first cooling pipe 52 is fixedly installed on the frame body 41 and the other end is fixedly connected with the fixed water tank 51. The end of the first cooling pipe 52 close to the fixed water tank 51 is communicated with the inside of the fixed water tank 51. The end of the first cooling pipe 52 away from the fixed water tank 51 is directed towards the cutter 42 and the direction of spraying the cooling liquid is inclined downward towards the accommodation space 8, so that the cooling liquid can be sprayed to cool the cutter 42 and then contact the large gear ring 6 and enter the accommodation space 8. In this embodiment, the first cooling pipe 52 having the above functions is a common prior art, so it will not be described here and only a brief representation is made in the drawings.

[0047] The movable water tank 53 is in the shape of a ring, is fixedly installed on the bearing tray 31, and its axis coincides with the axis of the bearing tray 31. The movable water tank 53 also has a space for storing cooling liquid inside. In this embodiment, the movable water tank 53 is preferably located inside the protrusion 311 and abuts against the protrusion 311. The movable water tank 53 is located below the four second driving members 332.

[0048] The plurality of cooling assemblies 54 correspond to the plurality of positioning assemblies 33 one by one. The cooling assembly 54 comprises a second cooling pipe 541 and a pressing member 542.

[0049] One end of the second cooling pipe 541 is fixedly connected with the movable water tank 53 and communicated with the inside of the movable water tank 53. The other end of the second cooling pipe 541 penetrates into the corresponding positioning claw 331 and is fixedly connected with the corresponding positioning claw 331. The end of the second cooling pipe 541 away from the movable water tank 53 penetrates out of the corresponding limiting portion 3311 and can spray cooling liquid towards the direction close to the positioning space 7. In this embodiment, the second cooling pipe 541 is preferably a hose. Since the second cooling pipe 541 having the above functions is a common prior art, it will not be described here and only a brief representation is made in the drawings.

[0050] The pressing member 542 is movably installed on the top of the corresponding positioning claw 331. During the movement of the pressing member 542 relative to the corresponding positioning claw 331, the pressing member 542 can press the end of the corresponding second cooling pipe 541 away from the movable water tank 53 to change the speed of spraying cooling liquid by the corresponding second cooling pipe 541. In this embodiment, the pressing member 542 is movably connected with the corresponding positioning claw 331 along the direction parallel to the axis of the bearing tray 31. When the pressing member 542 is not subjected to external force, it can be moved to the limit position away from the corresponding second cooling pipe 541 under the elastic force of the corresponding second cooling pipe 541. At this time, the speed of spraying cooling liquid by the second cooling pipe 541 is the slowest.

[0051] The body 2 is fixedly installed with a push block 22 on the boss 21 for pushing the extrusion piece 542 to move relative to the positioning claw 331, and the push block 22 is located below the frame body 41. During the rotation of the positioning claw 331 along with the supporting tray 31 towards the position close to the cutter 42, the corresponding extrusion piece 542 will move towards the direction close to the push block 22, and during the movement of the corresponding positioning claw 331 from below the push block 22, the push block 22 will push the extrusion piece 542 downwards to extrude the corresponding second cooling pipe 541, so that the second cooling pipe 541 has a spraying cooling effect on the large gear ring 6, and the cooling effect on the cutting position of the large gear ring 6 close to the cutter 42 is stronger, so that the heat distribution of the large gear ring 6 is more uniform.

[0052] During the machining of the inner teeth of the large gear ring 6, the cooling liquid sprayed by the cooling device 5 can not only cool and cool the cutter 42 and the large gear ring 6, but also drive the generated debris into the accommodation space 8 for collection.

[0053] The lifting piece 341 is uniformly provided with a plurality of drainage holes 3411 for discharging the cooling liquid, the two ends of the drainage hole 3411 are communicated with the accommodation space 8 and the outer space of the lifting piece 341 respectively, and the plurality of drainage holes 3411 are distributed in a circumferential array on the lifting piece 341 with the axis of the lifting piece 341 as the axis.

[0054] The supporting tray 31 is also provided with a water collecting groove 312 for collecting the cooling liquid at the position close to the outer side of the top of the supporting tray 31, the water collecting groove 312 has a ring structure and forms an opening for the cooling liquid to enter at the top of the supporting tray 31, and the axis of the water collecting groove 312 coincides with the axis of the supporting tray 31. In the embodiment, the water collecting groove 312 is preferably located on the inner side of the movable water tank 53, and the movable water tank 53 is preferably provided with a pipeline extending outward for the cooling liquid in the water collecting groove 312 to enter the inside of the movable water tank 53, so as to recycle the cooling liquid collected by the water collecting groove 312; since the pipeline for realizing the above function is a common prior art, it will not be described here, and only a brief representation is made in the drawings.

[0055] Referring to Figure 2 and Figure 4 Further, the lifting assembly 34 further comprises a movable disc 343, a plurality of intercepting pieces 344 and a plurality of elastic pieces 345.

[0056] Referring to Figure 4 and Figure 5The active disc 343 is in a disc structure as a whole, is installed at the inner side of the lifting piece 341 and is movably connected with the lifting piece 341, the axis of the active disc 343 is coincident with the axis of the lifting piece 341, and the moving direction of the active disc 343 is parallel to the axis of the active disc 343. The active disc 343 has a limit in the moving process relative to the lifting piece 341, when the active disc 343 moves upward to the limit position, the active disc 343 blocks the plurality of drainage holes 3411 close to one end of the accommodation space 8 at the same time; when the active disc 343 moves downward to the limit position, the plurality of drainage holes 3411 close to one end of the accommodation space 8 can all be in complete communication with the accommodation space 8.

[0057] The elastic piece 345 is installed at the inner part of the lifting piece 341, the two ends of the elastic piece 345 are fixedly connected with the active disc 343 and the lifting piece 341 respectively, and the elastic piece 345 has a tendency to drive the active disc 343 to move upward to the limit position relative to the lifting piece 341 and to keep the active disc 343. In the embodiment, the elastic piece 345 is preferably a compression spring, and the lifting assembly 34 preferably includes one elastic piece 345.

[0058] The top of the active disc 343 has a groove 3432 for collecting debris, and the groove 3432 is in a flared shape upward. The intercepting piece 344 is in an arc structure as a whole, the bottom of the intercepting piece 344 is fixedly connected with the supporting tray 31, and the arc opening of the intercepting piece 344 faces the axis of the active disc 343; a plurality of matching openings 3431 which are matched with the intercepting piece 344 are vertically and penetratingly formed on the active disc 343, the two ends of the matching openings 3431 are respectively communicated with the groove 3432 and the space in the accommodation space 8 below the active disc 343; when the top of the intercepting piece 344 penetrates into the corresponding matching opening 3431, the intercepting piece 344 can block the corresponding matching opening 3431. In the embodiment, the arc trajectory of the intercepting piece 344 is preferably a circular arc, and the axis of the arc trajectory of the intercepting piece 344 is coincident with the axis of the active disc 343, and preferably, there is a spacing for the flow of cooling liquid between adjacent intercepting pieces 344.

[0059] When the active disc 343 moves upward to the limit position relative to the lifting piece 341, at this time, the top of the intercepting piece 344 is flush with the groove wall end face of the bottom of the groove 3432; the cooling liquid and the debris entering the accommodation space 8 are all accumulated above the active disc 343, when the cooling liquid and the debris are accumulated to a certain amount above the active disc 343, the weight of the cooling liquid and the debris will drive the active disc 343 to move downward against the force of the elastic piece 345; when the active disc 343 moves downward to the limit position relative to the lifting piece 341, the end portions of the plurality of intercepting pieces 344 will be located in the groove 3432 for intercepting the debris, so as to reduce the probability of the debris being discharged with the cooling liquid through the drainage hole 3411; finally, the debris will be collected in the groove 3432, which is convenient for subsequent processing by the staff.

[0060] The implementation principle of the numerical control gear hobbing machine for processing the inner teeth of a gear ring in the embodiment of the application is as follows: After the staff clamps and positions the large gear ring 6 on the body 2 through the positioning device 3, leaves the machining space 11 and closes the door plate 13, then the program control machining device 4 and the cooling device 5 are used to process the inner teeth of the large gear ring 6; During the inner teeth processing, the first cooling pipe 52 continuously sprays the cutting tool 42 with cooling liquid, and the plurality of second cooling pipes 541 continuously spray the surface of the large gear ring 6 with cooling liquid, so as to control the temperature of the cutting tool 42 and the large gear ring 6 during the processing; during the spraying of the cooling liquid, the cooling liquid can be concentrated in the accommodation space 8, and the generated debris can be driven to be concentrated in the accommodation space 8, so as to facilitate the recycling of the cooling liquid and the subsequent unified processing of the debris by the staff.

[0061] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A CNC gear hobbing machine for machining internal gears of a gear ring, characterized in that: It comprises a housing (1), a body (2), a positioning device (3), a processing device (4) and a cooling device (5); The shell (1) has a processing space (11) inside and an inlet and outlet (12) communicating with the processing space (11) is provided on one side, and a door panel (13) for controlling the opening and closing of the inlet and outlet (12) is movably installed on one side of the shell (1); The machine body (2) is fixedly arranged in the processing space (11), and the positioning device (3), the processing device (4) and the cooling device (5) are all arranged on the top of the machine body (2); The positioning device (3) comprises a tray (31), a first driving member (32) and a plurality of positioning components (33); the tray (31) is rotatably mounted on the top of the machine body (2), and its rotation axis is vertical and coincides with its own axis; the first driving member (32) is provided on the machine body (2) and is used to drive the tray (31) to rotate; The positioning assembly (33) is arranged on the top of the support tray (31), and a plurality of the positioning assemblies (33) are distributed in a circular array with the axis of the support tray (31) as the axis; the positioning assembly (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 the plurality of positioning claws (331) are enclosed to form a positioning space (7); The processing device (4) includes a frame (41), a 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 tool (42) is rotatably connected to the frame (41), and its rotation axis coincides with its own axis and is perpendicular to the rotation axis of the support tray (31); the third driving member (43) is provided on the frame (41) and is used to drive the 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 a plurality of cooling components (54); the fixed water tank (51) is arranged on the frame (41); the first cooling pipe (52) is arranged on the frame (41) and is located on one side of the tool (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 cooling liquid toward a position close to the tool (42); The movable water tank (53) is arranged on the supporting tray (31), and the plurality of cooling components (54) correspond one to one with the plurality of 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 cooling liquid toward the edge of the positioning space (7).

2. A CNC gear hobbing machine for machining internal gears of a gear ring according to claim 1, characterized in that: The positioning device (3) further includes a lifting assembly (34); The lifting assembly (34) is arranged on the top of the supporting 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 supporting tray (31) and its movable direction is parallel to the axis of the supporting tray (31); the fourth driving member (342) is arranged on the supporting tray (31) and is used to drive the lifting member (341) to move.

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

4. A CNC gear hobbing machine for machining internal gears of a gear ring according to claim 2, characterized in that: The lifting member (341) is provided with a plurality of drainage holes (3411) for discharging coolant, and both ends of the drainage holes (3411) are respectively in communication with the clearance space (8) and the outer space of the lifting member (341).

5. A CNC gear hobbing machine for machining internal gears of a gear ring according to claim 4, characterized in that: The lifting assembly (34) further includes a movable disk (343), a plurality of intercepting members (344) and a plurality of elastic members (345); The movable plate (343) is movably arranged on the lifting member (341) and is 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 arranged on the top of the supporting tray (31) and is used to intercept debris, and the movable plate (343) is provided with a plurality of matching openings (3431) adapted to the intercepting member (344); When the movable disk (343) moves upward to the extreme position, the tops of the plurality of intercepting members (344) are flush with the top end surface of the movable disk (343); the two ends of the elastic member (345) are respectively connected to the movable disk (343) and the lifting member (341), and it has a tendency to drive the movable disk (343) to move upward to the extreme position and maintain it.

6. A CNC gear hobbing machine for machining internal gears of a gear ring according to claim 5, characterized in that: The top of the movable disk (343) has an upwardly flared groove (3432); When the movable disk (343) moves upward to the extreme position, the top of the intercepting member (344) is flush with the end surface of the groove wall at the bottom of the groove (3432), and the movable disk (343) blocks the multiple drainage holes (3411); after the movable disk (343) moves downward, the drainage holes (3411) are communicated with the space above the movable disk (343).

7. The CNC gear hobbing machine for machining the internal gear of a gear ring according to claim 5, characterized in that: The intercepting piece (344) is in an arc-shaped strip structure, with its arc opening facing the axis of the supporting tray (31), and there is a distance between adjacent intercepting pieces (344).

8. The CNC gear hobbing machine for machining the internal gear of a gear ring according to claim 4, characterized in that: The movable water tank (53) is annular in structure and is distributed along the edge of the top of the support tray (31); a water collecting trough (312) is provided at a position near the movable water tank (53) on the top of the support tray (31), and the coolant collected in the water collecting trough (312) is recycled by the movable water tank (53).

9. The CNC gear hobbing machine for machining the internal gear of a gear ring according to claim 4, characterized in that: The direction in which the first cooling pipe (52) sprays the cooling liquid is toward the positioning space (7).

10. The CNC gear hobbing machine for machining the internal gear of a gear ring according to claim 1, characterized in that: The cooling assembly (54) further includes an extrusion piece (542); the second cooling tube (541) is elastic, and the extrusion piece (542) is movably disposed on the positioning claw (331) and is used to extrude the corresponding second cooling tube (541); The machine body (2) is provided with a push block (22) below the frame (41). When the positioning claw (331) moves along with the rotation of the support tray (31), when the positioning claw (331) moves to a position close to the frame (41), the push block (22) contacts the corresponding extrusion member (542) and drives it to extrude the corresponding second cooling tube (541).

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