Special composite milling machine for bell-shaped shell

Abstract

The application relates to a special composite milling machine for bell-shaped shells, which comprises a rack, a clamping mechanism for workpiece clamping, a turning mechanism for spherical surface turning and a milling mechanism for spherical channel milling, wherein the rack is movably connected with a cutter workbench, the milling mechanism comprises a plurality of cutter mounting seats for assembling milling cutters, a plurality of arc gears, a plurality of hinged seats, an end face gear, an angle adjusting assembly and a position adjusting assembly, the angle adjusting assembly is used for simultaneously adjusting the shaft angle between the plurality of arc gears and the end face gear, and the position adjusting assembly is used for simultaneously adjusting the spacing between the plurality of arc gears. The device integrates the clamping mechanism, the turning mechanism and the milling mechanism, realizes the composite machining of the spherical surface and the spherical channel of the bell-shaped shell, does not need to change the device for multiple times, reduces the clamping frequency of the workpiece, and improves the machining efficiency and the overall precision. In the milling mechanism, the end face gear drives a plurality of arc gears, realizes the synchronous work of a plurality of milling cutters, mills a plurality of spherical channels at a time, and improves the machining efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bell housing manufacturing, in particular to a special composite milling machine for bell housings. BACKGROUND

[0002] Reference Figure 10 The bell housing 8 is a part in the constant velocity joint, and is usually a hollow housing with one end open, similar in shape to a bell, with a special spherical surface 46 structure and a plurality of ball channels 47 arranged in a ring array around the central axis of the bell housing 8.

[0003] In the prior art, the internal spherical surface structure is turned and formed by a lathe, and then the ball channels are milled and formed by a milling machine; however, this method is undoubtedly low in processing efficiency, and the bell housing is processed and formed by the lathe and the milling machine respectively, which is prone to cause problems such as poor positional relationship between the spherical surface and the ball channels and low coaxiality. SUMMARY

[0004] In order to facilitate the processing and manufacturing of the bell housing, the present application provides a special composite milling machine for bell housings.

[0005] The special composite milling machine for bell housings provided by the present application adopts the following technical scheme:

[0006] A special composite milling machine for bell housings comprises a rack, a clamping mechanism for clamping workpieces, a turning mechanism for turning spherical surfaces, and a milling mechanism for milling ball channels, wherein the rack is movably connected to a tool working table, the milling mechanism comprises a plurality of tool mounting seats for mounting milling cutters, a plurality of arc gears, a plurality of hinged seats, an end face gear, an angle adjusting assembly, and a position adjusting assembly, the end face gear is rotatably connected to the tool working table, the plurality of hinged seats correspond to the plurality of arc gears and the plurality of tool mounting seats respectively, the plurality of hinged seats are movably connected to the tool working table respectively, the plurality of tool mounting seats are rotatably connected to the corresponding hinged seats respectively, the plurality of arc gears are coaxial and fixedly connected to the corresponding tool mounting seats respectively, and the plurality of arc gears are always in meshing connection with the end face gear, the angle adjusting assembly is used to adjust the shaft angle between the plurality of arc gears and the end face gear, and the position adjusting assembly is used to adjust the spacing between the plurality of arc gears.

[0007] By adopting the technical scheme, the device integrated clamping mechanism, the turning mechanism and the milling mechanism are adopted to realize the compound machining of the spherical surface and the spherical channel of the bell-shaped shell, without the need of multiple equipment replacement, the number of workpiece clamping is reduced, and the machining efficiency and overall precision are improved. In the milling mechanism, the face gear drives multiple arc gears, synchronous work of multiple milling cutters can be realized, multiple spherical channels can be machined at a time, and the machining efficiency is greatly improved; the angle adjusting assembly can simultaneously adjust the shaft angle between the arc gears and the face gear, so as to simultaneously meet the arc machining requirements of the multiple spherical channels and increase the arc consistency between the multiple spherical channels, thereby facilitating the machining and manufacturing of the bell-shaped shell; the position adjusting assembly is used for simultaneously adjusting the spacing between the multiple arc gears, and can adapt to the spherical channel parameters of different specifications of the bell-shaped shell.

[0008] Preferably, the position adjusting assembly comprises a plurality of sliding seats and a first driving member, the plurality of sliding seats are respectively corresponding to a plurality of hinged seats, the plurality of sliding seats are respectively slidably connected to the cutter workbench in a direction perpendicular to the axis of the face gear, the plurality of hinged seats are respectively hingedly connected to the corresponding sliding seats, and the first driving member is used for simultaneously driving the sliding of the plurality of sliding seats.

[0009] By adopting the technical scheme, the hinged seat moves with the sliding seat, and drives the tool mounting seat to change the position synchronously, so as to adjust the spacing between the milling cutters.

[0010] Preferably, the first driving member comprises a first plane threaded disc, a first gear and a first motor, the first plane threaded disc is rotationally connected to the cutter workbench, the plurality of sliding seats are respectively threadedly connected to the first plane threaded disc, the first plane threaded disc is coaxially and fixedly connected with a first gear ring, the first gear is rotationally connected to the cutter workbench, the first gear is meshingly connected with the first gear ring, and the first motor is used for driving the rotation of the first gear.

[0011] By adopting the technical scheme, the first motor drives the rotation of the first gear, and the first gear ring and the coaxial first plane threaded disc are driven to rotate through gear meshing. The threads of the first plane threaded disc are matched with the threads of the sliding seat, the rotary motion is converted into the linear sliding of the sliding seat, and finally the movement of the milling cutter is realized, so as to adjust the spacing between the milling cutters.

[0012] Preferably, the angle adjusting assembly comprises a plurality of sliding blocks, a plurality of hinged rods and a second driving member, the plurality of hinged seats are respectively corresponding to the plurality of sliding blocks and the plurality of hinged rods, the plurality of sliding blocks are respectively slidably connected to the corresponding hinged seats, two ends of the plurality of hinged rods are respectively hingedly connected to the corresponding sliding blocks and the corresponding hinged seats, and the second driving member is used for simultaneously driving the sliding of the plurality of sliding blocks.

[0013] By adopting the technical scheme, in the angle adjusting assembly, the second driving member drives the sliding block to slide in a specific direction on the hinge seat, the sliding block pulls or pushes the tool mounting seat through the hinge rod, so that the tool mounting seat rotates around the hinge point of the hinge seat, thereby changing the shaft angle of the arc gear and the face gear.

[0014] Preferably, the second driving member comprises a second plane threaded disc, a second gear and a second motor, the second plane threaded disc is rotationally connected on the tool workbench, the plurality of sliding blocks are threadedly connected on the second plane threaded disc respectively, a second gear ring is coaxially and fixedly connected on the second plane threaded disc, the second gear is rotationally connected on the tool workbench, the second gear is meshingly connected with the second gear ring, and the second motor is used to drive the rotation of the second gear.

[0015] By adopting the technical scheme, the second motor drives the second gear to rotate, the second gear ring and the second plane threaded disc are driven to rotate through meshing, the threads of the plane threaded disc cooperate with the sliding blocks to convert the rotary motion into the linear sliding of the sliding blocks, the sliding blocks pull or push the tool mounting seat through the hinge rod, so that the tool mounting seat rotates around the hinge point of the hinge seat, thereby changing the shaft angle of the arc gear and the face gear.

[0016] Preferably, the clamping mechanism comprises a three-jaw chuck and a spindle box, the rack is rotationally connected with a clamp workbench, the spindle box is movably connected on the clamp workbench, and the three-jaw chuck is rotationally connected on the spindle box.

[0017] By adopting the technical scheme, the three-jaw chuck can quickly and stably clamp clock shells with different diameters, and the clamping efficiency is high; the spindle box is movable, the relative position of the workpiece and the tool can be adjusted, and the machining of clock shells with different lengths is adapted. The clamp workbench rotates in cooperation with the movement of the spindle box, so that the position adjustment of the workpiece in different directions can be realized, the multi-directional machining demand in turning and milling is met, and the flexibility of the equipment is improved.

[0018] Preferably, the rack is provided with an annular guide rail, the bottom of the clamp workbench is provided with a sliding support block, the sliding support block slides along the annular guide rail, a rotary servo motor is fixedly installed on the rack, and the rotary servo motor is used to drive the clamp workbench to rotate around the central axis of the annular guide rail.

[0019] By adopting the technical scheme, the annular guide rail + sliding support block provides stable guidance for the rotation of the clamp workbench, avoids shaking during rotation, guarantees the rotation stability of the workpiece, and is especially suitable for the continuous rotation demand of clock shell spherical turning. The rotary servo motor accurately controls the rotation angle and speed of the clamp workbench, cooperates with the actions of the turning mechanism and the milling mechanism, realizes the automatic machining of the spherical surface and the ball channel, and improves the machining precision and the degree of automation.

[0020] Preferably, the turning mechanism comprises a tool holder and a plurality of bolts, the tool holder is fixedly connected to the tool table, a tool placing groove for mounting a turning tool is formed in the tool holder, and the plurality of bolts are threadedly connected to the tool holder respectively, and one end of each of the plurality of bolts penetrates into the tool placing groove.

[0021] By adopting the technical scheme, the turning tool can be taken out by loosening the bolts, without using complex tools, so that the tool changing time is shortened, and the tool wear replacement in batch production is suitable, the threaded connection of the bolts provides sufficient clamping force, the turning tool is ensured to be stable in force during cutting, vibration and chatter are reduced, and the machining surface quality is improved.

[0022] The technical effects of the present application mainly embody in the following aspects:

[0023] 1. The milling mechanism is arranged, the face gear drives a plurality of arc gears, synchronous work of a plurality of milling tools can be realized, a plurality of ball grooves can be machined at a time, and the machining efficiency is greatly improved.

[0024] 2. The angle adjusting assembly is arranged, the shaft angle between the plurality of arc gears and the face gear can be adjusted at the same time, the radian machining requirements of the plurality of ball grooves are simultaneously met, the radian consistency between the plurality of ball grooves is increased, and the machining and manufacturing of the bell-shaped shell are facilitated.

[0025] 3. The position adjusting assembly is arranged, and the ball groove parameters of different specifications of bell-shaped shells can be adapted. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the rack structure of the embodiment of the present application.

[0028] Figure 3 It is an enlarged view of the position A along the direction of arrow A in the figure. Figure 2

[0029] Figure 4 It is a schematic diagram of the milling mechanism structure of the embodiment of the present application.

[0030] Figure 5 It is a schematic diagram of the angle adjusting assembly structure of the embodiment of the present application.

[0031] Figure 6 It is a schematic diagram of the position adjusting assembly structure of the embodiment of the present application.

[0032] Figure 7 It is a schematic diagram of the face gear structure of the embodiment of the present application.

[0033] Figure 8 It is a schematic diagram of the structure after angle adjustment of the embodiment of the present application. ​

[0034] Figure 9 is a schematic diagram of a sliding seat structure of an embodiment of the present application.

[0035] Figure 10 is a schematic diagram of a bell-shaped shell structure of an embodiment of the present application.

[0036] Reference signs: 1, frame; 2, clamping mechanism; 3, turning mechanism; 4, milling mechanism; 5, tool working table; 6, sliding plate; 7, driving motor; 8, bell-shaped shell; 10, Y-axis guide rail; 11, Y-axis servo motor; 12, X-axis guide rail; 16, X-axis servo motor; 17, clamp working table; 18, annular guide rail; 19, sliding support block; 21, three-jaw chuck; 22, spindle box; 23, rotating motor; 24, tool mounting seat; 25, arc gear; 26, hinged seat; 27, face gear; 28, angle adjusting assembly; 29, position adjusting assembly; 30, sliding seat; 31, first driving member; 32, first plane threaded disc; 33, first gear; 34, first motor; 35, first gear ring; 36, sliding block; 37, hinged rod; 38, second driving member; 39, second plane threaded disc; 40, second gear; 41, second motor; 42, second gear ring; 43, tool holder; 44, bolt; 45, tool storage groove; 46, spherical surface; 47, spherical channel. DETAILED DESCRIPTION

[0037] The following will be described in detail in combination with the accompanying Figures 1-10 The present application will be further described in detail to make the technical solutions of the present application easier to understand and grasp.

[0038] The embodiment of the present application discloses a special composite milling machine for bell-shaped shells.

[0039] With reference to Figure 1 and Figure 2 , the special composite milling machine for bell-shaped shells of the embodiment comprises a frame 1, further comprises a clamping mechanism 2 for workpiece clamping, a turning mechanism 3 for spherical surface 46 turning and a milling mechanism 4 for spherical channel 47 milling, and the frame 1 is movably connected with a tool working table 5 and a sliding plate 6. The frame 1 is fixedly connected with a Y-axis guide rail, the bottom of the sliding plate 6 is fixedly connected with a Y-axis sliding block in sliding fit with the Y-axis guide rail, and the sliding plate 6 moves along the Y-axis guide rail through a Y-axis driving device; the Y-axis driving device comprises a Y-axis lead screw and a Y-axis servo motor, the Y-axis lead screw is rotationally connected to the frame 1 and threadedly cooperates with a nut seat at the bottom of the sliding plate 6, and the Y-axis servo motor is used to drive the rotation of the Y-axis lead screw.

[0040] With reference to Figure 1 and Figure 2The sliding plate 6 is fixedly connected with an X-axis guide rail, the cutter workbench 5 is fixedly connected with an X-axis sliding block matched with the X-axis guide rail at the bottom, and the cutter workbench 5 moves along the X-axis guide rail through an X-axis driving device.

[0041] With reference to Figure 1 and Figure 2 The fixture workbench 17 is rotatably connected to the rack 1, the rack 1 is fixedly connected with an annular guide rail 18, the fixture workbench 17 is fixedly connected with a sliding support block 19 at the bottom, the sliding support block 19 slides along the annular guide rail 18, and a rotary servo motor is fixedly installed on the rack 1 and used to drive the fixture workbench 17 to rotate around the central axis of the annular guide rail 18.

[0042] With reference to Figure 1 and Figure 2 The clamping mechanism 2 comprises a three-jaw chuck 21 and a spindle box 22, the spindle box 22 is movably connected to the fixture workbench 17, the three-jaw chuck 21 is rotatably connected to the spindle box 22, a rotating motor 23 is installed on the fixture workbench 17 and used to drive the three-jaw chuck 21 to rotate. The three-jaw chuck 21 can quickly and stably clamp the bell-shaped shell 8 with different diameters, and the clamping efficiency is high; the spindle box 22 is movable, can adjust the relative position of the workpiece and the cutter, and is suitable for machining the bell-shaped shell 8 with different lengths. The fixture workbench 17 rotates and cooperates with the movement of the spindle box 22, so that the position adjustment of the workpiece in different directions can be realized, the multi-directional machining requirement during turning and milling is met, and the flexibility of the equipment is improved.

[0043] With reference to Figure 1 and Figure 2 The annular guide rail 18 and the sliding support block 19 provide stable guidance for the rotation of the fixture workbench 17, avoid shaking during rotation, ensure the stability of the workpiece rotation, and are especially suitable for the continuous rotation requirement of the bell-shaped shell 8 during turning of the spherical surface 46. The rotary servo motor accurately controls the rotation angle and speed of the fixture workbench 17, the Y-axis servo motor and the X-axis servo motor accurately control the moving distance and speed of the cutter workbench 5, cooperates with the actions of the turning mechanism 3 and the milling mechanism 4, realizes the automatic machining of the spherical surface 46 and the spherical channel 47, and improves the machining precision and the degree of automation.

[0044] With reference to Figure 4 and Figure 5The milling mechanism 4 comprises three tool mounting seats 24, three arc gears 25, three hinged seats 26, an end face gear 27, an angle adjusting assembly 28 and a position adjusting assembly 29, the end face gear 27 is rotationally connected to the tool workbench 5 along the Y-axis direction, the tool workbench 5 is fixedly connected with a driving motor 7, the driving motor 7 is used to drive the rotation of the end face gear 27, the three hinged seats 26 correspond to the three arc gears 25 and the three tool mounting seats 24 respectively, the three hinged seats 26 are movably connected to the tool workbench 5 respectively, the three hinged seats 26 are uniformly distributed around the central axis of the end face gear 27, the three tool mounting seats 24 are coaxial and rotationally connected to the corresponding hinged seats 26 respectively, the three arc gears 25 are coaxial and fixedly connected to the corresponding tool mounting seats 24 respectively, and the three arc gears 25 are always in meshing connection with the end face gear 27, the angle adjusting assembly 28 is used to simultaneously adjust the shaft angle between the arc gears 25 and the end face gear 27, and the position adjusting assembly 29 is used to simultaneously adjust the spacing between the arc gears 25.

[0045] With reference to Figure 1 and Figure 2 , the device integrated clamping mechanism 2, the turning mechanism 3 and the milling mechanism 4 are combined to realize the complex machining of the spherical surface 46 and the ball channel 47 of the bell housing 8, without the need for multiple equipment changes, reducing the number of workpiece clamping, and improving the machining efficiency and overall precision. In the milling mechanism 4, the end face gear 27 drives multiple arc gears 25, which can realize the synchronous work of multiple milling cutters, machining multiple ball channels 47 at a time, greatly improving the machining efficiency; the angle adjusting assembly 28 can simultaneously adjust the shaft angle between the arc gears 25 and the end face gear 27 to simultaneously meet the machining requirements of the arc of multiple ball channels 47, and increase the arc consistency between multiple ball channels 47, facilitating the machining and manufacturing of the bell housing 8; the position adjusting assembly 29 is used to simultaneously adjust the spacing between the arc gears 25, which can adapt to the parameters of the ball channels 47 of different specifications of the bell housing 8.

[0046] With reference to Figure 5 , Figure 6 and Figure 9The position adjusting assembly 29 comprises three sliding seats 30 and a first driving member 31. The three sliding seats 30 correspond to the three hinged seats 26 respectively. The three sliding seats 30 are slidingly connected to the tool table 5 along the direction perpendicular to the axis of the face gear 27. The three sliding seats 30 are arranged in a ring array with the central axis of the face gear 27 as the reference. The three hinged seats 26 are hingedly connected to the corresponding sliding seats 30 along the direction perpendicular to the sliding direction of the corresponding sliding seat 30. The first driving member 31 is used to simultaneously drive the sliding of the three sliding seats 30. The first driving member 31 comprises a first plane threaded disc 32, a first gear 33 and a first motor 34. The first plane threaded disc 32 is rotationally connected to the tool table 5 along the Y-axis direction. The three sliding seats 30 are threadedly connected to the first plane threaded disc 32. The first plane threaded disc 32 is coaxially and fixedly connected with a first gear ring 35. The first gear 33 is rotationally connected to the tool table 5. The first gear 33 is meshingly connected with the first gear ring 35. The first motor 34 is used to drive the rotation of the first gear 33.

[0047] With reference to Figure 5 and Figure 6 The first motor 34 drives the rotation of the first gear 33, which drives the rotation of the first gear ring 35 and the coaxial first plane threaded disc 32 through gear meshing. The threads of the first plane threaded disc 32 are matched with the threads of the sliding seat 30 to convert the rotary motion into the linear sliding of the sliding seat 30, so as to finally realize the movement of the milling cutter and adjust the distance between the milling cutters.

[0048] With reference to Figure 5 , Figure 7 and Figure 8 The angle adjusting assembly 28 comprises three sliding blocks 36, three hinged rods 37 and a second driving member 38. The three hinged seats 26 correspond to the three sliding blocks 36 and the three hinged rods 37 respectively. The three sliding blocks 36 are slidingly connected to the corresponding sliding seats 30 along the sliding direction of the corresponding sliding seat 30. The two ends of the three hinged rods 37 are hingedly connected to the corresponding sliding block 36 and the corresponding hinged seat 26 respectively. The second driving member 38 is used to simultaneously drive the sliding of the three sliding blocks 36. The second driving member 38 comprises a second plane threaded disc 39, a second gear 40 and a second motor 41. The second plane threaded disc 39 is rotationally connected to the tool table 5 along the Y-axis direction. The second plane threaded disc 39 is coaxial with and oppositely arranged to the first plane threaded disc 32. The three sliding blocks 36 are threadedly connected to the second plane threaded disc 39. The second plane threaded disc 39 is coaxially and fixedly connected with a second gear ring 42. The second gear 40 is rotationally connected to the tool table 5. The second gear 40 is meshingly connected with the second gear ring 42. The second motor 41 is used to drive the rotation of the second gear 40.

[0049] With reference to Figure 7 and Figure 8In the angle adjusting assembly 28, the second motor 41 drives the second gear 40 to rotate, and drives the second gear ring 42 and the second plane threaded disc 39 to rotate through meshing, the thread of the second plane threaded disc 39 cooperates with the sliding block 36 to convert the rotary motion into the linear sliding of the sliding block 36, and the sliding block 36 pulls or pushes the tool mounting base 24 through the hinged rod 37 to make the tool mounting base 24 rotate around the hinge point of the hinge base 26, so as to change the axial angle of the arc gear 25 and the face gear 27.

[0050] With reference to Figure 2 and Figure 3 , the turning mechanism 3 comprises a tool holder 43 and a plurality of bolts 44, the tool holder 43 is fixedly connected to the tool working platform 5, the tool holder 43 is provided with a tool placing groove 45 for mounting a turning tool, and the plurality of bolts 44 are respectively threadedly connected to the tool holder 43 and respectively penetrate into the tool placing groove 45. The turning tool can be taken out by loosening the bolts 44, without using complex tools, so that the tool changing time is shortened, and the tool wear replacement in batch production is suitable. The threaded connection of the bolts 44 provides sufficient clamping force, ensures the stability of the turning tool in the cutting process, reduces vibration and chatter, and improves the surface quality of the machining.

[0051] With reference to Figure 1 and Figure 2 , the rack 1 is further provided with a controller, which is used for receiving signals of the motors and controlling the start-stop and forward-reverse rotation of the motors.

[0052] With reference to Figure 1 and Figure 2 , the machining process of the bell-shaped shell 8 is as follows:

[0053] S1 workpiece clamping: the bell-shaped shell 8 is placed on the three-jaw chuck 21, and the three-jaw chuck 21 quickly and stably clamps the workpiece. According to the length of the bell-shaped shell 8, the spindle box 22 is moved to adjust the relative position of the workpiece and the tool, and after clamping is completed, the rotating motor 23 drives the three-jaw chuck 21 to drive the workpiece to rotate, to prepare for machining;

[0054] S2 turning mechanism 3 adjustment: the controller drives the X-axis servo motor and the Y-axis servo motor according to the parameters of the spherical surface 46 of the bell-shaped shell 8: the X-axis driving device drives the tool working platform 5 to slide along the X-axis guide rail on the slide plate 6 to adjust the position of the turning tool in the X direction; the Y-axis driving device drives the slide plate 6 to slide along the Y-axis guide rail on the rack 1 to adjust the position of the turning tool in the Y direction: finally, the turning tool of the turning mechanism 3 is accurately aligned with the starting position of the spherical surface 46 to be machined of the workpiece;

[0055] S3 milling mechanism 4 adjustment:

[0056] Pitch adjustment: according to the number and pitch parameters of the ball channel 47 of the bell-shaped shell 8, the controller starts the first motor 34 of the position adjustment assembly 29; the first motor 34 drives the first gear 33 to rotate, drives the first plane threaded disc 32 to rotate through meshing with the first gear ring 35, synchronously slides the plurality of sliding seats 30 along the direction perpendicular to the axis of the end face gear 27, and then drives the cutter holder 24 to move through the hinged seat 26, adjusts the pitch between the plurality of milling cutters, and matches the pitch requirement of the channel;

[0057] Angle adjustment: according to the arc parameter of the ball channel 47, the controller starts the second motor 41 of the angle adjustment assembly 28; the second motor 41 drives the second gear 40 to rotate, drives the second plane threaded disc 39 to rotate through meshing with the second gear ring 42, synchronously slides the plurality of sliding blocks 36, pulls / pushes the cutter holder 24 to rotate around the hinged seat 26 through the hinged rod 37, adjusts the axial angle of the arc gear 25 and the end face gear 27, and ensures that the milling cutter cutting track meets the arc requirement of the channel;

[0058] S4 turning of the spherical surface 46: the controller starts the rotating motor 23 to drive the three-jaw chuck 21 to rotate the bell-shaped shell 8; the rotating servo motor is synchronously controlled to drive the clamp workbench 17 to rotate slowly, and the position of the turning tool is finely adjusted through the X and Y axis driving devices, so that the turning tool continuously cuts along the track of the spherical surface 46 to complete the machining of the spherical surface 46;

[0059] During the turning process, the annular guide rail 18 and the sliding support block 19 ensure that the clamp workbench 17 rotates stably to avoid vibration affecting the smoothness of the spherical surface 46; the servo motors accurately control the rotating speed and the moving amount to ensure the dimensional accuracy of the spherical surface 46;

[0060] S5 milling of the ball channel 47: the controller drives the end face gear 27 to rotate, drives the plurality of milling cutters to synchronously rotate through meshing with the plurality of arc gears 25, so that the milling cutters cut along the track of the ball channel 47 to complete the machining of the three ball channels 47 at one time; after the machining of the first group of three ball channels 47 is completed, the three-jaw chuck 21 is driven to rotate by the rotating motor 23 to start the machining of the second group of three ball channels 47.

[0061] During the whole process, the servo motors are cooperatively controlled to ensure the dimensional accuracy, positional accuracy and consistency of the channels.

[0062] S6 machining completion: after all the machining processes are completed, the driving devices are turned off, the three-jaw chuck 21 is loosened, and the machined bell-shaped shell 8 is taken out to complete the whole machining process.

[0063] Of course, the above is only a typical example of the present application, and in addition to this, the present application can have other various specific implementation manners, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection of the present application.

Claims

1. A special composite milling machine for bell-shaped shells, comprising a frame (1), characterized in that: Also include the clamping mechanism (2) for workpiece clamping, turning mechanism (3) for turning of spherical surface (46) and milling mechanism (4) for milling of spherical channel (47), the rack (1) is movably connected with the cutter workbench (5), the milling mechanism (4) includes a plurality of cutter mounting seats (24) for assembling milling cutter, a plurality of arc gears (25), a plurality of articulated seats (26), face gear (27), angle adjusting assembly (28) and position adjusting assembly (29), the face gear (27) is rotatably connected on the cutter workbench (5), a plurality of articulated seats (26) correspond to a plurality of arc gears (25) and a plurality of cutter mounting seats (24) respectively, a plurality of articulated seats (26) are movably connected on the cutter workbench (5) respectively, a plurality of cutter mounting seats (24) are rotatably connected on the corresponding articulated seat (26) respectively, a plurality of arc gears (25) are coaxially and fixedly connected on the corresponding cutter mounting seat (24) respectively, and a plurality of arc gears (25) are always meshed with the face gear (27) respectively, the angle adjusting assembly (28) is used for simultaneously adjusting the shaft angle between a plurality of arc gears (25) and the face gear (27), and the position adjusting assembly (29) is used for simultaneously adjusting the spacing between a plurality of arc gears (25); The position adjusting assembly (29) includes a plurality of sliding seats (30) and a first driving member (31), a plurality of sliding seats (30) correspond to a plurality of articulated seats (26) respectively, a plurality of sliding seats (30) are slidingly connected on the cutter workbench (5) in the direction perpendicular to the axis of the face gear (27) respectively, a plurality of articulated seats (26) are hingedly connected on the corresponding sliding seat (30) respectively, and the first driving member (31) is used for simultaneously driving the sliding of a plurality of sliding seats (30); The first driving member (31) includes a first plane threaded disc (32), a first gear (33) and a first motor (34), the first plane threaded disc (32) is rotatably connected on the cutter workbench (5), a plurality of sliding seats (30) are threadedly connected with the first plane threaded disc (32) respectively, the first plane threaded disc (32) is coaxially and fixedly connected with a first gear ring (35), the first gear (33) is rotatably connected on the cutter workbench (5), the first gear (33) is meshed with the first gear ring (35), and the first motor (34) is used for driving the rotation of the first gear (33); The angle adjusting assembly (28) includes a plurality of sliding blocks (36), a plurality of articulated rods (37) and a second driving member (38), a plurality of articulated seats (26) correspond to a plurality of sliding blocks (36) and a plurality of articulated rods (37) respectively, a plurality of sliding blocks (36) are slidingly connected on the corresponding sliding seat (30) respectively, both ends of a plurality of articulated rods (37) are hingedly connected on the corresponding sliding block (36) and the corresponding articulated seat (26) respectively, and the second driving member (38) is used for simultaneously driving the sliding of a plurality of sliding blocks (36). The second driving member (38) comprises a second plane threaded disc (39), a second gear (40) and a second motor (41), the second plane threaded disc (39) is rotationally connected on the tool workbench (5), the plurality of sliding blocks (36) are respectively threadedly connected on the second plane threaded disc (39), the second plane threaded disc (39) is coaxially and fixedly connected with a second gear ring (42), the second gear (40) is rotationally connected on the tool workbench (5), the second gear (40) is meshingly connected with the second gear ring (42), and the second motor (41) is used for driving rotation of the second gear (40).

2. The special composite milling machine for bell-shaped shell according to claim 1, characterized in that: The clamping mechanism (2) comprises a three-jaw chuck (21) and a main shaft box (22), the rack (1) is rotationally connected with a clamp workbench (17), the main shaft box (22) is movably connected on the clamp workbench (17), and the three-jaw chuck (21) is rotationally connected on the main shaft box (22).

3. The special composite milling machine for bell-shaped shell according to claim 2, characterized in that: The rack (1) is provided with an annular guide rail (18), the clamp workbench (17) is provided with a sliding support block (19) at the bottom, the sliding support block (19) slides along the annular guide rail (18), and a rotary servo motor is fixedly installed on the rack (1), and the rotary servo motor is used for driving the clamp workbench (17) to rotate around the central axis of the annular guide rail (18).

4. The special composite milling machine for bell housing according to claim 1, characterized in that: The turning mechanism (3) comprises a tool holder (43) and a plurality of bolts (44), the tool holder (43) is fixedly connected on the tool workbench (5), the tool holder (43) is provided with a tool placing groove (45) for installing a turning tool, and the plurality of bolts (44) are respectively threadedly connected on the tool holder (43), and the ends of the plurality of bolts (44) are respectively arranged in the tool placing groove (45).

Images