CN117340608A - Accurate turning device of abnormal shape work piece - Google Patents

Abstract

The invention relates to the technical field of turning devices and discloses a special-shaped workpiece precise turning device which comprises a frame, an end face turning piece and an inner hole turning piece, wherein the end face turning piece and the inner hole turning piece are arranged on the frame, the inner hole turning piece comprises a bottom plate, a driving motor, an extension rod, an inner cutter and an inner cutting frame, the driving motor is arranged on the bottom plate in a sliding connection mode, the extension rod is arranged at the end part of the driving motor, an adjusting piece for driving the inner cutting frame to rotate is arranged on the frame, and the end face turning piece comprises a support, a control motor, a control wheel, a driven wheel, a telescopic piece, a milling cutter assembly and a rotating piece.

Description

Accurate turning device of abnormal shape work piece

Technical Field

The invention relates to the technical field of turning devices, in particular to a special-shaped workpiece precise turning device.

Background

Lathe work is part of machining. The lathe processing mainly uses a turning tool to carry out turning processing on a rotating workpiece. The lathe can also be used for corresponding machining by using a drill bit, a reamer, a tap, a die, a knurling tool and the like. Lathes are used primarily for machining shafts, discs, sleeves and other workpieces having surfaces of revolution, and are the most widely used type of machine tool in machinery manufacturing and repair facilities. In machining, there are a variety of parts. The workpieces with different shapes all have different processing modes. Milling is mostly used in the production of spherical parts. Milling the spherical surface on the milling machine has the characteristics of high production efficiency, accurate spherical surface geometric shape and the like, so that the mechanical part is a crankshaft. Most of the materials are processed by adopting a milling process. However, for processing a special-shaped workpiece, multiple procedures of pipelining operation are needed, so that the common processing of the workpiece cannot be realized, the time consumption is long, the time cost is increased, and the procedure is complex.

Disclosure of Invention

The invention aims to provide a special-shaped workpiece precise turning device, which can realize synchronous internal spherical turning and end surface turning of the same workpiece, thereby greatly saving the machining efficiency and reducing the time cost and the working procedure cost.

The technical aim of the invention is realized by the following technical scheme: the utility model provides a special-shaped workpiece precision turning device, includes the frame, sets up terminal surface turning piece and hole turning piece in the frame, the hole turning piece includes the bottom plate, sets up driving motor, extension rod, interior skiving, interior cutting rack on the bottom plate, bottom plate sliding connection is in the frame, the extension rod sets up driving motor's tip, the driving motor drive extension rod rotates, interior cutting rack rotates to be connected the tip of extension rod, interior skiving fixed connection is in interior cutting rack's tip, be provided with the drive in the frame interior cutting rack pivoted regulating part, the terminal surface turning piece includes support, control motor, control wheel, from driving wheel, extensible member, milling cutter subassembly, rotating member, the support is vertical to be set up in the frame, control motor sets up in the frame, control wheel coaxial fixed connection is in control motor's output, from the driving wheel rotates through the driven rod to be connected on the support, from the driving wheel with be connected through the belt between the control wheel extensible member, the setting is in the support, the extensible member sets up on the rotating member sets up on the support, the driving cutter subassembly is in the milling cutter subassembly rotates.

By adopting the technical scheme, the turning device can realize synchronous inner spherical turning and end face turning of the same workpiece, so that the machining efficiency is greatly saved, and the time cost and the working procedure cost are reduced.

The invention is further provided with: the adjusting piece comprises a sliding sleeve and a pull rod, a plurality of limiting sliding rods are axially arranged on the extending lever arm, limiting sliding grooves are formed in the sliding sleeve, the sliding sleeve is matched with the limiting sliding rods through the limiting sliding grooves and is connected to the extending lever in a sliding mode, two ends of the pull rod are respectively connected to the end portion of the inner cutting frame in a rotating mode, the middle of the inner cutting frame is connected to the end portion of the extending lever in a rotating mode, and the inner cutting knife is fixedly connected to one end, far away from the pull rod, of the cutting frame.

The invention is further provided with: the adjusting part further comprises an adjusting frame, a driving hand wheel, a worm wheel, a rotating rod and an adjusting arm, wherein the adjusting frame is positioned on the bottom plate, the driving hand wheel is rotationally connected to the adjusting frame, the worm is axially arranged on the driving hand wheel, the rotating rod is rotationally connected to the adjusting frame, the worm wheel is coaxially and fixedly connected to the rotating rod, the worm wheel is meshed with the worm, the adjusting arm is radially and fixedly connected to the end part of the rotating rod, an annular groove is radially formed in the sliding sleeve, and an arc-shaped block is detachably connected to the end part of the adjusting arm and is in sliding clamping connection with the annular groove.

Through adopting above-mentioned technical scheme, wherein the regulating part thing passes through the regulation control hand wheel, and the control hand wheel drives the rotation of worm, and the worm drives the turbine and rotates, and the turbine drives the dwang and rotates, and the dwang drives the regulating arm of tip and rotates, and the slightly pivoted in-process of regulating arm can cooperate with the ring channel on the sliding sleeve through the arc piece of tip, further promotes sliding sleeve and moves along the extension pole, and sliding sleeve can promote the broaching frame through the pull rod and rotate, and the angle of its turning can be adjusted to the in-process of broaching frame pivoted, makes its inside turning form spherical hole.

The invention is further provided with: the telescopic part comprises a telescopic rod, a rotating disc and a screw rod, wherein the driven rod is far away from the rotating disc which is coaxially and fixedly connected with one end of the driven wheel, the telescopic rod is horizontally and slidably inserted on the support, one end of the telescopic rod, which is close to the rotating disc, is vertically provided with a driving strip-shaped hole, a plurality of threaded holes are radially formed in the rotating disc at one time, and the screw rod penetrates through the driving strip-shaped hole and is in threaded connection with the threaded holes.

Through adopting above-mentioned technical scheme, when the control motor drives from the driving wheel and carries out pivoted in-process, can rotate from the rolling disc on the driving wheel, the screw hole on the rolling disc is provided with a plurality ofly in radial direction to can realize the length of extension of telescopic link, through the drive bar hole with the telescopic link tip through the screw rod connection on different screw holes, can finally realize the turning of the work piece of terminal surface different inclination.

The invention is further provided with: the rotating piece comprises a first bevel gear, a second bevel gear, a moving rod, a triangular chuck and a movable column, wherein the movable column is slidably connected to the support, the triangular chuck is arranged at the end part of the movable column, the moving rod is arranged at the other end of the movable column, the second bevel gear is synchronously arranged at the end part of the movable column, the first bevel gear is coaxially connected to the control wheel, and the first bevel gear is meshed with the second bevel gear.

The invention is further provided with: the milling cutter assembly comprises a telescopic column, a milling cutter motor and a turning milling cutter, wherein the telescopic column is vertically and slidably connected with the end part of the telescopic rod, the milling cutter motor is arranged at the upper end of the telescopic column, the turning milling cutter is positioned at the lower end of the telescopic column, the output end of the milling cutter motor penetrates through the telescopic column and is connected with the turning milling cutter, and a synchronizing piece is arranged on the telescopic column and drives the telescopic column to move up and down.

The invention is further provided with: the synchronous piece includes synchronous plate, synchronizing rod, synchronous hand wheel, gear, rack, four sides groove, the vertical fixed setting of synchronous plate is in the below of bottom plate, four sides groove sets up on the synchronous plate, rotate in the frame and be connected with the regulation actuating lever, the one end of adjusting the actuating lever is connected with synchronous hand wheel, and the other end coaxial coupling is the gear, the rack sets up the below of synchronous plate, the gear with the rack meshes mutually, the side of telescopic column is provided with the horizontal plate, the horizontal hole has been seted up on the horizontal plate, the four sides groove has been seted up on the synchronous plate, the guide block has been seted up in the frame, the one end of synchronizing rod is connected respectively on the horizontal plate, and the other end activity is passed the guide block is connected in the four sides inslot.

The invention is further provided with: the four-side groove comprises a horizontal groove and an inclined groove which are oppositely arranged, wherein the horizontal groove is communicated with the inclined groove, an inclined surface is arranged at one end of the horizontal groove, and the height of the end part of the inclined surface is lower than that of the inclined groove.

The invention is further provided with: the end part of the synchronizing rod is connected with the four-side groove through an elastic piece, the elastic piece comprises an elastic column and a spring, the elastic column comprises an elastic inserting column and a limiting piece radially arranged on the elastic inserting column, and the spring is sleeved on the elastic column between the synchronizing rod and the limiting piece.

Through adopting above-mentioned technical scheme, the setting of spring can make the elastic column be located the four sides inslot all the time.

Through adopting above-mentioned technical scheme, when synchronous hand wheel drives the gear through adjusting the actuating lever and can drive the synchronizing plate and move right, the elastic column of synchronizing lever tip is located the horizontal inslot motion of four sides inslot this moment, because the synchronizing plate is located the lower extreme of bottom plate, therefore, when the synchronizing plate moves right, the bottom plate also can move right, the motion of bottom plate can drive hole turning piece right motion this moment, break away from with the work piece, this moment, milling cutter and work piece terminal surface laminating on the face turning piece can carry out the processing of terminal surface, the synchronizing plate moves further right side, the synchronizing rod moves to the inclined groove, the inclined groove can drive the synchronizing rod upward movement through the elastic component this moment, the synchronizing rod upper end can drive telescopic column upward movement through the horizontal plate, make terminal surface turning piece break away from with the work piece, this process terminal surface turning piece and hole turning piece all separate with the work piece, do not carry out the processing of work piece, synchronous hand wheel rotates anticlockwise this moment, the synchronizing plate moves left, the internal hole turning piece can enter into the inside of work piece gradually, the processing of ball hole can be carried out to the terminal surface turning piece, terminal surface and work piece, the synchronizing plate continues left motion, the synchronizing plate descends, the section can drive the terminal surface and can move down, the terminal surface and the telescopic column can be combined with the work piece can realize with the control mode that the telescopic column moves down.

The beneficial effects of the invention are as follows:

1. the turning device can realize synchronous internal spherical turning and end face turning of the same workpiece, greatly saves machining efficiency, reduces time cost and process cost, and realizes the turning of the end face of the workpiece by driving the extension rod to rotate through the driving motor, and the extension rod can drive the internal cutting tool on the end cutting frame to rotate, thereby realizing the internal turning, wherein the end face turning is realized by controlling the motor to drive the control wheel to drive the driven wheel to rotate, and the driven wheel can drive the telescopic piece to move, thereby realizing the movement of the milling cutter assembly and the turning of the end face of the workpiece.

2. Wherein the adjusting event passes through the regulation control hand wheel, and the control hand wheel drives the rotation of worm, and the worm drives the turbine and rotates, and the turbine drives the dwang and rotates, and the dwang drives the regulating arm of tip and rotates, and the slightly pivoted in-process of regulating arm can cooperate with the ring channel on the sliding sleeve through the arc piece of tip, further promotes the sliding sleeve and moves along the extension pole, and the sliding sleeve can promote the broaching frame through the pull rod and rotate, and the angle of its turning can be adjusted to the in-process of broaching frame pivoted, makes its inside turning form spherical hole.

3. When the control motor drives the driven wheel to rotate, the rotating disc on the driven wheel can rotate, a plurality of threaded holes on the rotating disc are arranged in the radial direction, so that the extension length of the telescopic rod can be realized, and the driving strip-shaped holes at the end part of the telescopic rod are connected to different threaded holes through screws, so that the turning of workpieces with different inclined angles of the end face can be finally realized.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is a schematic diagram of the front view structure of the present invention.

Fig. 3 is a schematic view of a partial structure of the present invention.

Fig. 4 is a schematic diagram of the front view structure in fig. 2.

FIG. 5 is a schematic view of a partial construction of a female lathe tool according to the present invention.

Fig. 6 is a schematic view of a partial structure of an end face turning piece in the present invention.

Fig. 7 is a schematic view of the partial structure at a in fig. 6.

Fig. 8 is a schematic view of a partial structure of a synchronizing member in the present invention.

Fig. 9 is a schematic cross-sectional view of a synchronizing member according to the present invention.

Fig. 10 is a schematic view of the partial structure at B in fig. 9.

In the figure, 1, a rack; 2. an inner bore turning piece; 21. a bottom plate; 22. a driving motor; 23. an extension rod; 24. an inner cutter; 25. an inner cutting frame; 3. end face turning pieces; 31. a bracket; 32. controlling a motor; 33. a control wheel; 34. driven wheel; 35. a belt; 36. a rotating disc; 361. a screw; 362. a threaded hole; 37. a telescopic rod; 371. driving the strip-shaped hole; 38. a telescopic column; 381. a horizontal plate; 382. a horizontal hole; 39. a milling cutter motor; 391. turning a milling cutter; 4. an adjusting member; 41. a sliding sleeve; 411. limiting sliding grooves; 412. an annular groove; 42. a pull rod; 43. a limit slide bar; 44. an adjusting frame; 45. driving a hand wheel; 46. a worm; 47. a worm wheel; 48. a rotating lever; 49. an adjusting arm; 491. an arc-shaped block; 5. a rotating member; 51. a bevel gear; 52. a second bevel gear; 53. a motion bar; 54. a triangular chuck; 55. a movable column; 6. a synchronizing member; 61. a synchronizing plate; 62. a synchronizing lever; 63. a synchronous hand wheel; 64. a gear; 65. a rack; 66. a four-sided slot; 661. a horizontal slot; 662. an inclined groove; 67. adjusting the driving rod; 7. an elastic column; 71. an elastic plug; 72. a limiting piece; 8. and (3) a spring.

Detailed Description

The technical scheme of the present invention will be clearly and completely described in connection with specific embodiments. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.

The embodiment is shown in fig. 1-4, a special-shaped workpiece precision turning device comprises a frame 1, an end surface turning piece 3 and an inner hole turning piece 2 which are arranged on the frame 1, wherein the inner hole turning piece 2 comprises a bottom plate 21, a driving motor 22, an extension rod 23, an inner cutting blade 24 and an inner cutting frame 25 which are arranged on the bottom plate 21, the bottom plate 21 is connected to the frame 1 in a sliding manner, the extension rod 23 is arranged at the end part of the driving motor 22, the driving motor 22 drives the extension rod 23 to rotate, the inner cutting frame 25 is connected to the end part of the extension rod 23 in a rotating manner, the inner cutting blade 24 is fixedly connected to the end part of the inner cutting frame 25, an adjusting piece 4 which drives the inner cutting frame 25 to rotate is arranged on the frame 1, the end surface turning piece 3 comprises a support 31, a control motor 32, a control wheel 33, a driven wheel 34, a telescopic piece, a milling cutter assembly and a rotating piece 5, the support 31 is vertically arranged on the frame 1, the control motor 32 is arranged on the frame 1, the control wheel control motor 33 is fixedly connected to the end part of the control motor 22, the driven wheel is connected to the control wheel 33, the driven wheel is fixedly connected to the output end of the driven wheel 34 through the telescopic piece 33, and the telescopic piece 33 is connected to the telescopic piece 35, and the driven wheel 34 is arranged on the driven wheel 34 through the telescopic piece and the telescopic piece 33.

By adopting the technical scheme, the turning device can realize synchronous inner spherical turning and end face turning of the same workpiece, so that the machining efficiency is greatly saved, and the time cost and the process cost are reduced, wherein the inner control turning piece drives the extension rod 23 to rotate through the driving motor 22, the extension rod 23 can drive the inner cutting knife 24 on the end cutting frame to rotate, so that the inner turning is realized, the end face turning piece 3 drives the control wheel 33 to drive the driven wheel 34 to rotate through the control motor 32, and the driven wheel 34 can drive the telescopic piece to move, so that the movement of the milling cutter assembly is realized, and the turning of the end face of the workpiece is realized.

As shown in fig. 5, the present invention is further configured to: the adjusting piece 4 comprises a sliding sleeve 41 and a pull rod 42, a plurality of limiting sliding rods 43 are axially arranged on the arm of the extension rod 23, limiting sliding grooves 411 are formed in the sliding sleeve 41, the sliding sleeve 41 is matched with the limiting sliding rods 43 through the limiting sliding grooves 411 and is in sliding connection with the extension rod 23, two ends of the pull rod 42 are respectively connected with the end part of the inner cutting frame 25 and the sliding sleeve 41 in a rotating mode, the middle of the inner cutting frame 25 is connected with the end part of the extension rod 23 in a rotating mode, and the inner cutting knife 24 is fixedly connected with one end, far away from the pull rod 42, of the cutter cutting frame.

As shown in fig. 5, the present invention is further configured to: the adjusting piece 4 further comprises an adjusting frame 44, a driving hand wheel 45, a worm 46, a worm wheel 47, a rotating rod 48 and an adjusting arm 49, wherein the adjusting frame 44 is positioned on the bottom plate 21, the driving hand wheel 45 is rotationally connected to the adjusting frame 44, the worm 46 is axially arranged on the driving hand wheel 45, the rotating rod 48 is rotationally connected to the adjusting frame 44, the worm wheel 47 is coaxially and fixedly connected to the rotating rod 48, the worm wheel 47 is meshed with the worm 46, the adjusting arm 49 is radially and fixedly connected to the end part of the rotating rod 48, an annular groove 412 is radially formed in the sliding sleeve 41, an arc-shaped block 491 is detachably connected to the end part of the adjusting arm 49, and the arc-shaped block 491 is slidably clamped in the annular groove 412.

Through adopting above-mentioned technical scheme, wherein adjusting part 4 thing passes through the regulation control hand wheel, the rotation of control hand wheel drive worm 46, worm 46 drives the turbine and rotates, the turbine drives dwang 48 and rotates, dwang 48 drives the adjusting arm 49 of tip and rotates, the little pivoted in-process of adjusting arm 49, can cooperate with the ring channel 412 on the sliding sleeve 41 through the arc piece 491 of tip, further promote sliding sleeve 41 and move along extension rod 23, sliding sleeve 41 can promote the broaching frame through pull rod 42 and rotate, the angle of its turning can be adjusted to the in-process of broaching frame pivoted, make its inside turning form spherical hole.

As shown in fig. 6, the present invention is further configured to: the telescopic member comprises a telescopic rod 37, a rotating disc 36 and a screw 361, one end of the driven rod, which is far away from the driven wheel 34, is coaxially and fixedly connected with the rotating disc 36, the telescopic rod 37 is horizontally and slidably inserted on the bracket 31, one end of the telescopic rod 37, which is close to the rotating disc 36, is vertically provided with a driving strip-shaped hole 371, a plurality of threaded holes 362 are radially formed in the rotating disc 36 at one time, and the screw 361 penetrates through the driving strip-shaped hole 371 and is in threaded connection with the threaded holes 362.

Through adopting above-mentioned technical scheme, when the control motor 32 drives from driving wheel 34 and carries out pivoted in-process, the rolling disc 36 of driving wheel 34 can rotate, and the screw hole 362 on the rolling disc 36 is provided with a plurality of in radial direction to can realize the length of extension of telescopic link 37, through connecting the drive bar hole 371 of telescopic link 37 tip on different screw holes 362 through screw 361, can finally realize the turning of the work piece of terminal surface different inclination.

As shown in fig. 6, the present invention is further configured to: the rotor 5 includes a first bevel gear 6451, a second bevel gear 6452, a motion bar 53, a cam chuck 54, and a movable column 55, the movable column 55 is slidably connected to the support 31, the cam chuck 54 is disposed at an end of the movable column 55, the motion bar 53 is disposed at the other end of the movable column 55, the second bevel gear 6452 is disposed at an end of the movable column 55 in synchronization with the first bevel gear 6451, the first bevel gear 6451 is coaxially connected to the control wheel 33, and the first bevel gear 6451 is meshed with the second bevel gear 6452.

As shown in fig. 6, the present invention is further configured to: the milling cutter assembly comprises a telescopic column 38, a milling cutter motor 39 and a milling cutter 391, wherein the telescopic column 38 is vertically and slidably connected to the end portion of the telescopic rod 37, the milling cutter motor 39 is arranged at the upper end of the telescopic column 38, the milling cutter 391 is positioned at the lower end of the telescopic column 38, the output end of the milling cutter motor 39 penetrates through the telescopic column 38 to be connected with the milling cutter 391, a synchronizing piece 6 is arranged on the telescopic column 38, and the synchronizing piece 6 drives the telescopic column 38 to move up and down.

As shown in fig. 4, 7 and 8, the present invention is further configured to: the synchronous piece 6 comprises a synchronous plate 61, a synchronous rod 62, a synchronous hand wheel 63, a gear 64, a rack 65 and a four-side groove 66, wherein the synchronous plate 61 is vertically and fixedly arranged below the bottom plate 21, the four-side groove 66 is arranged on the synchronous plate 61, an adjusting driving rod 67 is rotationally connected to the frame 1, one end of the adjusting driving rod 67 is connected with the synchronous hand wheel 63, the other end of the adjusting driving rod 67 is coaxially connected with the gear 64, the rack 65 is arranged below the synchronous plate 61, the gear 64 is meshed with the rack 65, a horizontal plate 381 is arranged on the side face of the telescopic column 38, a horizontal hole 382 is formed in the horizontal plate 381, the four-side groove 66 is formed in the synchronous plate 61, a guide block is formed in the frame 1, one end of the synchronous rod 62 is respectively connected to the horizontal plate 381, and the other end of the synchronous rod 62 movably penetrates through the guide block to be connected to the four-side groove 66.

As shown in fig. 8, 9 and 10, the present invention is further configured to: the four-side groove 66 comprises a horizontal groove 661 and an inclined groove 662 which are oppositely arranged, the horizontal groove 661 is communicated with the inclined groove 662, an inclined surface is arranged at one end of the horizontal groove 661, and the height of the end part of the inclined surface is lower than that of the inclined groove 662.

As shown in fig. 10, the present invention is further configured to: the end of the synchronizing rod 62 is connected with the four-side groove 66 through an elastic piece, the elastic piece comprises an elastic column 7 and a spring 8, the elastic column 7 comprises an elastic inserting column 71 and a limiting plate 72 radially arranged on the elastic inserting column 71, and the spring 8 is sleeved on the elastic column 7 between the synchronizing rod 62 and the limiting plate 72.

Through adopting above-mentioned technical scheme, when synchronous hand wheel 63 drives gear 64 through adjusting actuating lever 67 and carries out the in-process that rotates clockwise and can drive synchronous plate 61 to move rightwards, the elastic column 7 that this moment synchronous rod 62 tip is located the horizontal groove 661 in four sides inslot 66 and moves, because synchronous plate 61 is located the lower extreme of bottom plate 21, therefore, when synchronous plate 61 moves rightwards, bottom plate 21 also can move rightwards, the motion of bottom plate 21 can drive hole turning piece 2 and move rightwards this moment, break away from with the work piece, at this moment, milling cutter on the face turning piece 3 and work piece terminal surface laminating can carry out the processing of terminal surface, synchronous plate 61 moves further rightwards, synchronous rod 62 moves into inclined groove 662, inclined groove 662 can drive synchronous rod 62 upward through the elastic component this moment, synchronous rod 62 upper end can drive flexible post 38 upward through horizontal plate 381, make face turning piece 3 and work piece break away from, this process terminal surface turning piece 3 and hole turning piece 2 all separate from the work piece, when not carrying out the processing of work piece, synchronous hand wheel 63 anticlockwise rotates, synchronous hand wheel 63 moves leftwards, synchronous plate 61 can gradually get into the inside work piece 2, can carry out the processing of work piece 3 with the work piece is carried out the hole with the work piece is continued to the inner face turning piece, can be carried out the simultaneous movement of end surface control piece is moved down, can realize the end face-down, can be continued to the end face control piece is moved down, and can be moved down, and can realize the work piece is moved down.

The turning device can realize synchronous internal spherical turning and end face turning of the same workpiece, machining efficiency is greatly saved, time cost and process cost are reduced, wherein the internal control turning piece drives the extension rod 23 to rotate through the driving motor 22, the extension rod 23 drives the internal cutting tool 24 on the end cutting rack to rotate, and therefore internal turning is realized, the end face turning piece 3 drives the driven wheel 34 to rotate through the control motor 32 driving the control wheel 33, the driven wheel 34 drives the telescopic piece to move, and therefore movement of the milling cutter assembly is realized, and turning of the end face of the workpiece is realized.

Claims (9)

1. The utility model provides a special-shaped work piece precision turning device which characterized in that: the milling cutter comprises a frame (1), an end face turning piece (3) and an inner hole turning piece (2) which are arranged on the frame (1), wherein the inner hole turning piece (2) comprises a bottom plate (21), a driving motor (22) arranged on the bottom plate (21), an extension rod (23), an inner cutter (24) and an inner cutter frame (25), the bottom plate (21) is slidably connected to the frame (1), the extension rod (23) is arranged at the end part of the driving motor (22), the driving motor (22) drives the extension rod (23) to rotate, the inner cutter frame (25) is rotatably connected to the end part of the extension rod (23), the inner cutter (24) is fixedly connected to the end part of the inner cutter frame (25), an adjusting piece (4) for driving the inner cutter frame (25) to rotate is arranged on the frame (1), the end face turning piece (3) comprises a bracket (31), a control motor (32), a control wheel (33), a driven wheel (34), a telescopic piece, an assembly and a rotating piece (5), the control motor (31) are arranged on the frame (1), and the control wheel (32) is coaxially arranged at the end face turning piece is fixedly connected to the frame (32), driven wheel (34) are connected on support (31) through driven pole rotation, driven wheel (34) with be connected through belt (35) between control wheel (33), the extensible member sets up on support (31), milling cutter subassembly sets up on the extensible member, driven wheel (34) drive the extensible member drives milling cutter subassembly motion, rotor (5) with control wheel (33) are connected, control wheel (33) drive rotor (5) rotate.

2. The special-shaped workpiece precision turning device according to claim 1, wherein: the adjusting piece (4) comprises a sliding sleeve (41) and a pull rod (42), a plurality of limiting sliding rods (43) are axially arranged on the arm of the extension rod (23), limiting sliding grooves (411) are formed in the sliding sleeve (41), the sliding sleeve (41) is matched with the limiting sliding rods (43) to be connected onto the extension rod (23) in a sliding mode through the limiting sliding grooves (411), two ends of the pull rod (42) are respectively connected onto the end portion of the inner cutting frame (25) and the sliding sleeve (41) in a rotating mode, the middle of the inner cutting frame (25) is connected onto the end portion of the extension rod (23) in a rotating mode, and the inner cutting knife (24) is fixedly connected onto one end, far away from the pull rod (42), of the cutting frame.

3. The special-shaped workpiece precision turning device according to claim 2, wherein: the adjusting piece (4) further comprises an adjusting frame (44), a driving hand wheel (45), a worm (46), a worm wheel (47), a rotating rod (48) and an adjusting arm (49), wherein the adjusting frame (44) is located on the bottom plate (21), the driving hand wheel (45) is rotationally connected to the adjusting frame (44), the worm (46) is axially arranged on the driving hand wheel (45), the rotating rod (48) is rotationally connected to the adjusting frame (44), the worm wheel (47) is coaxially and fixedly connected to the rotating rod (48), the worm wheel (47) is meshed with the worm (46), the adjusting arm (49) is radially and fixedly connected to the end portion of the rotating rod (48), an annular groove (412) is radially formed in the sliding sleeve (41), and an arc-shaped block (491) is detachably connected to the end portion of the adjusting arm (49) and is slidably clamped in the annular groove (412).

4. The special-shaped workpiece precision turning device according to claim 1, wherein: the telescopic piece comprises a telescopic rod (37), a rotating disc (36) and a screw rod (361), wherein the driven rod is far away from the rotating disc (36) which is coaxially and fixedly connected with one end of the driven wheel (34), the telescopic rod (37) is horizontally and slidably inserted on the support (31), one end, close to the rotating disc (36), of the telescopic rod (37) is vertically provided with a driving strip-shaped hole (371), a plurality of threaded holes (362) are radially formed in the rotating disc (36) at one time, and the screw rod (361) penetrates through the driving strip-shaped hole (371) and is in threaded connection with the threaded holes (362).

5. The special-shaped workpiece precision turning device according to claim 4, wherein: the rotating piece (5) comprises a first bevel gear (64) (51), a second bevel gear (64) (52), a moving rod (53), a triangular chuck (54) and a movable column (55), wherein the movable column (55) is connected to the support (31) in a sliding mode, the triangular chuck (54) is arranged at the end part of the movable column (55), the moving rod (53) is arranged at the other end of the movable column (55), the second bevel gear (64) (52) is synchronously arranged at the end part of the movable column (55), the first bevel gear (64) (51) is coaxially connected to the control wheel (33), and the first bevel gear (64) (51) is meshed with the second bevel gear (64) (52).

6. The special-shaped workpiece precision turning device according to claim 4, wherein: the milling cutter assembly comprises a telescopic column (38), a milling cutter motor (39) and a milling cutter (391), wherein the telescopic column (38) is vertically connected with the end part of the telescopic rod (37) in a sliding mode, the milling cutter motor (39) is arranged at the upper end of the telescopic column (38), the milling cutter (391) is arranged at the lower end of the telescopic column (38), the output end of the milling cutter motor (39) penetrates through the telescopic column (38) to be connected with the milling cutter (391), a synchronizing piece (6) is arranged on the telescopic column (38), and the synchronizing piece (6) drives the telescopic column (38) to move up and down.

7. The special-shaped workpiece precision turning device according to claim 6, wherein: the synchronous piece (6) comprises a synchronous plate (61), a synchronous rod (62), a synchronous hand wheel (63), a gear (64), a rack (65) and a four-side groove (66), wherein the synchronous plate (61) is vertically and fixedly arranged below the bottom plate (21), the four-side groove (66) is formed in the synchronous plate (61), an adjusting driving rod (67) is rotationally connected to the frame (1), one end of the adjusting driving rod (67) is connected with the synchronous hand wheel (63), the other end of the adjusting driving rod is coaxially connected with the gear (64), the rack (65) is arranged below the synchronous plate (61), the gear (64) is meshed with the rack (65), a horizontal plate (381) is arranged on the side face of the telescopic column (38), a horizontal hole (382) is formed in the horizontal plate (381), a guide block is formed in the frame (1), one end of the synchronous rod (62) is respectively connected to the horizontal plate (381), and the other end of the synchronous rod is movably connected to the guide block in the four-side groove (66).

8. The special-shaped workpiece precision turning device according to claim 7, wherein: the four-side groove (66) comprises a horizontal groove (661) and an inclined groove (662) which are oppositely arranged, the horizontal groove (661) is communicated with the inclined groove (662), an inclined surface is arranged at one end of the horizontal groove (661), and the height of the end part of the inclined surface is lower than that of the inclined groove (662).

9. The special-shaped workpiece precision turning device according to claim 7, wherein: the end of the synchronizing rod (62) is connected with the four-side groove (66) through an elastic piece, the elastic piece comprises an elastic column (7) and a spring (8), the elastic column (7) comprises an elastic inserting column (71) and a limiting piece (72) radially arranged on the elastic inserting column (71), and the spring (8) is sleeved on the elastic column (7) between the synchronizing rod (62) and the limiting piece (72).