CN212169734U

CN212169734U - Tower type boring and milling machining center

Info

Publication number: CN212169734U
Application number: CN202020872986.2U
Authority: CN
Inventors: 陈福祥; 张根法; 顾去非
Original assignee: Shanghai Xinluo Mechanical Engineering Co ltd
Current assignee: Shanghai Xinluo Mechanical Engineering Co ltd
Priority date: 2020-05-21
Filing date: 2020-05-21
Publication date: 2020-12-18
Anticipated expiration: 2030-05-21

Abstract

The utility model relates to the technical field of machining, and discloses a tower-type boring and milling machining center, which comprises a base cabin seat and a controller, wherein a cavity is formed in the middle of the base cabin seat, a liftable center barrel is arranged in the cavity, a bearing seat is fixed at the top of the center barrel, a rotary table is rotatably connected on the bearing seat, a left cutting arm and a right cutting arm are symmetrically arranged on two sides of the rotary table, a lower base is arranged on the left cutting arm in a sliding manner, an upper base is fixed on the lower base, and a cutter seat provided with a boring cutter is arranged on the upper base in a sliding manner; and one end of the right cutting arm, which is far away from the rotary table, is rotatably connected with a milling cutter seat provided with a milling cutter, and the right cutting arm is provided with a driving mechanism for driving the milling cutter seat to rotate. The utility model has the advantages of it is following and effect: according to the scheme, the active mechanism is utilized to drive the milling cutter seat to rotate so as to drive the milling cutter to work to complete the milling process; the installation of the boring cutter is realized by utilizing the cutter seat on the left cutting arm, so that the milling processing is realized, and the two sides can be simultaneously carried out, so that the processing efficiency is high.

Description

Tower type boring and milling machining center

Technical Field

The utility model relates to a machine tooling technical field, in particular to tower boring and milling machining center.

Background

With the continuous development of industrialization, the requirement on the machining production efficiency of workpieces is higher and higher, which puts forward higher new requirements on machining equipment, and not only the machining equipment is required to have high machining precision, but also the machining equipment is required to be capable of finishing the machining of multi-station steps as soon as possible. Numerical control technology and numerical control equipment are important foundations of manufacturing industry modernization, and a numerical control machine is a typical numerical control device which utilizes the numerical control technology to improve processing precision and efficiency, and the occurrence of the numerical control machine has revolutionary influence on the traditional manufacturing industry.

The machining center is a highly automated multifunctional numerical control machine tool with a tool magazine and an automatic tool changer, and a common machining center has multiple functions of turning, milling, boring and the like, but the machining center is mainly used for machining small and medium-sized parts, is rarely used for machining large-sized parts and extra-large-sized parts, and is particularly used for machining inner walls of cylindrical and box-shaped parts. Therefore, a boring and milling center capable of rapidly processing the inner wall of a large cylindrical or box-shaped part is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a tower boring and milling machining center can carry out quick processing to the inner wall of large-scale tube-shape, case form part.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

a tower type boring and milling machining center comprises a base bin seat and a controller installed on the base bin seat, wherein a cavity is formed in the middle of the base bin seat, a liftable center barrel is arranged in the cavity, a bearing seat is fixed to the top of the center barrel, a rotary table is rotatably connected to the bearing seat, a left cutting arm and a right cutting arm used for bearing a milling cutter are symmetrically arranged on two sides of the rotary table, a lower base is arranged on the left cutting arm in a sliding mode, an upper base is fixed to the lower base, and a cutter seat provided with a boring cutter is arranged on the upper base in a sliding mode; and one end of the right cutting arm, which is far away from the turntable, is rotatably connected with a milling cutter seat provided with a milling cutter, and the right cutting arm is provided with a driving mechanism for driving the milling cutter seat to rotate.

By adopting the technical scheme, the milling cutter seat is driven to rotate by the driving mechanism so as to drive the milling cutter to work and complete the milling process; the installation of the boring cutter is realized by utilizing the cutter seat on the left cutting arm, so that the milling processing is realized, and the two sides can be simultaneously carried out, so that the processing efficiency is high.

The present invention may be further configured in a preferred embodiment as: the driving mechanism comprises a driving motor which is fixed at one end, close to the rotary table, of the right cutting arm, and the driving motor is electrically connected with the controller, a straight tooth column is connected to the driving motor in a transmission mode, and a rotary drum with the end portion fixed with the milling cutter seat is sleeved on the straight tooth column in a sliding mode.

Through adopting above-mentioned technical scheme, when initiative motor rotated, drive the straight-tooth post and rotate to this drives the rotary drum and rotates with the milling cutter seat that the rotary drum is fixed, realizes milling cutter's rotation.

The present invention may be further configured in a preferred embodiment as: the square ram connected with the right cutting arm in a sliding mode is further fixed on the outer side wall of the rotary drum, a sliding motor electrically connected with the controller is arranged on one side of the driving motor, a horizontal lead screw is fixed on an output shaft of the sliding motor, a horizontal moving block fixed with the side wall of the square ram is arranged on the horizontal lead screw in a threaded fit mode, and a fixing seat for fixing the sliding motor is connected to the right cutting arm in a flange mode.

Through adopting above-mentioned technical scheme, when the motor that slides during operation, drive horizontal lead screw and rotate to this drives horizontal sliding block and square ram and moves along horizontal lead screw, with this regulation that realizes milling cutter position.

The present invention may be further configured in a preferred embodiment as: the cutting machine is characterized in that a lower base is arranged on the left cutting arm in a sliding mode, an upper base is fixed on the lower base, a cutter seat provided with a cutter is arranged on the upper base in a sliding mode, a sliding groove for sliding the lower base and an X-direction sliding mechanism used for driving the lower base to slide are arranged on the left cutting arm, the X-direction sliding mechanism comprises a first driving motor fixed to one end, close to the rotary table, of the sliding groove, an X-direction lead screw is fixed on an output shaft of the first driving motor, and a first moving block fixed to the top and the upper base is arranged on the X-direction lead screw in a threaded fit mode.

By adopting the technical scheme, when the first driving motor rotates, the X-direction lead screw is driven to rotate, so that the first moving block is driven to move along the X-direction lead screw, the X-direction sliding of the upper base and the cutter seat on the upper base is realized, and the X-direction position of the cutter is convenient to adjust.

The present invention may be further configured in a preferred embodiment as: the upper base is provided with a sliding groove for sliding the cutter seat and a Y-direction driving mechanism for driving the cutter seat to slide, the Y-direction driving mechanism comprises a second driving motor fixed at one end of the sliding groove, a Y-direction lead screw is fixed on an output shaft of the second driving motor, and a second moving block with the top fixed with the cutter seat is in threaded fit with the Y-direction lead screw.

Through adopting above-mentioned technical scheme, when second driving motor rotated, drive Y and rotate to the lead screw to this drive second movable block moves along Y to the lead screw, thereby realizes that the Y of cutter seat slides to being convenient for adjust the Y of cutter to the position.

The present invention may be further configured in a preferred embodiment as: the rotary table is characterized in that a rotating mechanism used for driving the rotary table to rotate is arranged on the base, the rotating mechanism comprises a rotating motor which is fixed on the edge of the lower surface of the bearing seat and electrically connected with the controller, an output shaft of the rotating motor extends upwards and penetrates through the bearing seat to be rotatably connected with the bearing seat, a driving gear is fixed at the top of the output shaft of the rotating motor, and a driven gear ring meshed with the driving gear is fixed on the lower surface of the rotary table.

Through adopting above-mentioned technical scheme, utilize to rotate motor drive driving gear and rotate to this drives driven ring gear and revolving stage and rotates, has realized the function of adjusting left cutting arm and right cutting arm, and the transmission of gear train, high-speed stable, precision is good, has reduced the influence of transmission structure to the work of cutter on left cutting arm and the right cutting arm, is favorable to ensureing the machining precision.

The present invention may be further configured in a preferred embodiment as: the bearing comprises a turntable, a bearing seat and a bearing seat, and is characterized in that a composite bearing assembly is arranged between the turntable and the bearing seat, the composite bearing assembly comprises a bearing outer ring fixed with the bearing seat and a bearing inner ring fixed with the turntable, an annular groove is formed in the bearing inner ring, the bearing outer ring is sleeved in the annular groove, and a plurality of rolling shafts are uniformly paved between the surface of the bearing outer ring and the annular groove.

Due to the fact that the equipment is large in specification and heavy in self-weight, the technical scheme is adopted, and the bearing inner ring and the bearing outer ring are combined to form the composite bearing assembly, so that the composite bearing assembly is suitable for the weight of the rotary table, and the condition that the rotation of the rotary table is influenced due to the damage of the bearing is avoided; and the friction force between the bearing inner ring and the bearing outer ring is reduced through the rolling shaft, and the energy consumption of the rotating motor is reduced.

The present invention may be further configured in a preferred embodiment as: the base is provided with a lifting mechanism for driving the rotary table to lift, the lifting mechanism comprises a lifting motor which is positioned in the central cylinder and is electrically connected with the controller, the lifting motor is connected with a lifting screw rod which is positioned in the middle of the central cylinder in a transmission manner, the bottom of the lifting screw rod is rotatably connected with the base and is provided with a lifting cylinder in a threaded fit manner, the top of the lifting cylinder extends out of the central cylinder and is fixed with a guide cylinder, and the center of the rotary table is provided with a guide hole clamped with the guide cylinder.

Through adopting above-mentioned technical scheme, utilize elevator motor drive lift lead screw to rotate to this drives a lift section of thick bamboo and reciprocates on lift lead screw, and then drives guide cylinder and revolving stage lift, has realized the regulation to left cutting arm and right cutting arm height.

To sum up, the utility model discloses a following at least one useful technological effect:

1. according to the scheme, the active mechanism is utilized to drive the milling cutter seat to rotate so as to drive the milling cutter to work to complete the milling process; the boring cutter is installed by utilizing the cutter seat on the left cutting arm, so that milling processing is realized, two sides can be simultaneously performed, and the processing efficiency is high;

2. according to the scheme, the driving gear is driven to rotate by the rotating motor, so that the driven gear ring and the rotary table are driven to rotate, the function of adjusting the left cutting arm and the right cutting arm is realized, the transmission of the gear train is high-speed and stable, the precision is good, the influence of a transmission structure on the work of cutters on the left cutting arm and the right cutting arm is reduced, and the machining precision is favorably ensured;

3. according to the scheme, the bearing inner ring and the bearing outer ring are combined to form the composite bearing assembly, so that the weight of the rotary table is adapted, and the condition that the rotation of the rotary table is influenced due to the damage of the bearing is avoided; and the friction force between the bearing inner ring and the bearing outer ring is reduced through the rolling shaft, and the energy consumption of the rotating motor is reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is an exploded view of the structure at the transfer station of the present invention;

FIG. 3 is an exploded view of the structure on the left cutting arm of the present invention;

fig. 4 is an exploded view of the inner structure of the right and middle cutting arms of the present invention.

Reference numerals: 1. a base bin seat; 11. a central barrel; 12. a bearing seat; 2. a turntable; 21. a guide hole; 22. a fabrication hole; 23. a top cover; 3. a left cutting arm; 31. a lower base; 32. an upper base; 33. an X-direction driving mechanism; 331. a first drive motor; 332. a screw rod in the X direction; 333. a first moving block; 34. a Y-direction driving mechanism; 341. a second drive motor; 342. a Y-direction lead screw; 343. a second moving block; 35. a tool holder; 4. a right cutting arm; 41. a rotating drum; 42. an active motor; 421. a straight toothed column; 43. a milling cutter seat; 44. a square ram; 45. a slip motor; 46. a fixed seat; 47. a horizontal lead screw; 48. a horizontal moving block; 51. rotating the motor; 52. a driving gear; 53. a driven gear ring; 54. a composite bearing assembly; 541. a bearing outer race; 542. a roller; 543. a bearing inner race; 544. an annular groove; 61. a lifting motor; 62. lifting a screw rod; 63. a transmission case; 64. a lifting cylinder; 65. a connecting disc; 66. a guide cylinder; 68. a load-bearing hydraulic cylinder; 69. a vertical slide rail; 691. and a vertical sliding block.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, a tower-type boring and milling center disclosed by the present invention comprises a base 1, a turntable 2 and a controller (not shown); the base bin seat 1 is in a tower shape, a cavity is reserved in the hollow base bin seat, a central cylinder 11 is arranged in the cavity, the cross section of the central cylinder 11 is in a regular octagon shape, the central cylinder is hollow, and a circular opening is formed in the top of the central cylinder. The top of the central cylinder 11 is provided with a bearing seat 12, the bearing seat 12 is in a circular disc structure, and the rotary table 2 is rotatably installed on the bearing seat 12. The cross section of the rotary table 2 is annular, two symmetrical sections are arranged on the periphery of the rotary table, and a left cutting arm 3 and a right cutting arm 4 are respectively fixed on the two sections. The left cutting arm 3 and the right cutting arm 4 are both box-type structures and are hollow inside. A cutter and a cutter seat 35 for boring are arranged on the left cutting arm 3, and a cutter seat 43 for milling are arranged on the right cutting arm 4; the controller is used as a central processing unit of the machining center and is used for recognizing operation commands compiled by operators and controlling the boring and milling tools to machine workpieces.

As shown in fig. 3, the left cutting arm 3 is provided with a lower base 31 and an upper base 32, the bottom of the upper base 32 is fixed to the lower base 31, and the upper base 32 is provided with a tool seat 35 for holding a tool. The left cutting arm 3 is provided with a sliding groove for the lower base 31 to slide and an X-direction sliding mechanism for driving the lower base 31 to slide, and the X-direction sliding mechanism comprises a first driving motor 331, an X-direction lead screw 332 and a first moving block 333. The first driving motor 331 is fixed at one end of the chute formed by the left cutting arm 3, which is close to the rotary table 2, an output shaft of the first driving motor 331 extends to the other end of the chute, an X-direction lead screw 332 is fixed on the output shaft of the first driving motor 331, and the other end of the X-direction lead screw 332 is rotatably connected with the other end of the chute. When the first driving motor 331 rotates, the X-direction lead screw 332 is driven to rotate, so as to drive the first moving block 333 to move along the X-direction lead screw 332, thereby realizing the X-direction sliding of the lower base 31 and the upper tool seat 35, and facilitating the adjustment of the X-direction position of the tool. The upper base 32 is provided with a sliding groove for sliding the tool holder 35 and a Y-direction driving mechanism 34 for driving the tool holder 35 to slide, and the Y-direction driving mechanism 34 includes a second driving motor 341, a Y-direction lead screw 342 and a second moving block 343. The second driving motor 341 is fixed at one end of the chute formed in the upper base 32, an output shaft of the second driving motor 341 extends to the other end of the chute, a Y-direction lead screw 342 is fixed on the output shaft of the second driving motor 341, and the other end of the Y-direction lead screw 342 is rotatably connected with the other end of the chute. When the second driving motor 341 rotates, the Y-direction lead screw 342 is driven to rotate, so as to drive the second moving block 343 to move along the Y-direction lead screw 342, thereby realizing Y-direction sliding of the tool holder 35, and facilitating adjustment of the Y-direction position of the tool.

As shown in fig. 1 and 4, the right cutting arm 4 is provided with a driving mechanism for driving the milling cutter holder 43 to rotate, and the driving mechanism includes a rotary drum 41, a driving motor 42 and a spur 421. The driving motor 42 is fixed at one end of the inside of the right cutting arm 4 close to the turntable 2, and the output shaft thereof extends towards the turntable 2; the straight tooth column 421 is located in the middle of the right cutting arm 4, and has long-strip-shaped teeth on the peripheral surface, and the length direction of the straight-tooth column is consistent with the length direction of the right cutting arm 4. One end of the straight tooth column 421 is in transmission with the output shaft of the driving motor 42 through a belt. The rotating cylinder 41 is fixed on the straight tooth column 421, and one end of the rotating cylinder far away from the turntable 2 is fixed with the milling cutter seat 43. When the driving motor 42 rotates, the spur 421 is driven to rotate, so as to drive the rotary drum 41 to rotate and the milling cutter seat 43 fixed to the rotary drum 41 to rotate, thereby realizing the rotation of the milling cutter.

The outer side wall of the rotating cylinder 41 is further fixed with a square ram 44 connected with the right cutting arm 4 in a sliding manner, the square ram 44 is cuboid, and one end of the square ram 44, which is far away from the rotary table 2, is abutted against the milling cutter seat 43. Flange connection has a fixing base 46 on the roof in the right side cutting arm 4, be fixed with the motor 45 that slides on the fixing base 46, the output shaft of the motor 45 that slides runs through and extends to the fixing base 46 other end and rotates with fixing base 46 to be connected, be fixed with horizontal lead screw 47 on the output shaft of the motor 45 that slides, horizontal lead screw 47 other end and the 4 end rotation of right side cutting arm are connected, and screw-thread fit has horizontal movable block 48 on the horizontal lead screw 47, horizontal movable block 48 is fixed with square ram 44 lateral wall. When the sliding motor 45 works, the horizontal screw rod 47 is driven to rotate, so that the horizontal sliding block and the square ram 44 are driven to move along the horizontal screw rod 47, and the position of the milling cutter is adjusted.

As shown in fig. 1, the base cartridge 1 is provided with a rotating mechanism, and the rotating mechanism includes a rotating motor 51, a driving gear 52, a driven ring gear 53, and a compound bearing assembly 54. In this embodiment, there are two rotating motors 51, the two rotating motors 51 are both fixed on the edge of the lower surface of the bearing seat 12 and electrically connected to the controller, the output shaft of the rotating motor 51 extends upward and penetrates through the bearing seat 12, the output shaft of the rotating motor 51 is rotatably connected to the bearing seat 12, and the driving gear 52 is fixed on the output shaft of the rotating motor 51. The driven gear ring 53 is circular, teeth are arranged on the outer side wall of the driven gear ring, the driven gear ring is fixed on the lower surface of the rotary table 2 through bolts, and the driven gear ring 53 is meshed with the two driving gears 52. When the rotating motor 51 is started, the driving gear 52 is driven to rotate, so that the driven gear ring 53 and the rotary table 2 are driven to rotate, and the function of adjusting the left cutting arm 3 and the right cutting arm 4 is realized.

The compound bearing assembly 54 includes a bearing outer race 541, a bearing inner race 543, and a roller 542. The bearing inner ring 543 and the bearing outer ring 541 are both circular rings, and an annular groove is formed around the bearing inner ring 543 for the bearing outer ring 541 to fit. The plurality of rollers 542 is provided, and the plurality of rollers 542 are uniformly laid between the surface of the bearing outer ring 541 and the annular groove 544. The bearing outer ring 541 is fixed on the upper surface of the bearing seat 12 through a hexagon bolt, the bearing inner ring 543 is fixed on the lower surface of the rotary table 2 through a hexagon bolt, and a plurality of threaded holes are distributed on the bearing inner ring 543 and the bearing outer ring 541 in a surrounding mode so that the inner hexagon bolt can penetrate through the threaded holes. A plurality of fabrication holes 22 penetrating through the turntable 2 are formed in the turntable 2 for a wrench to pass through, and the distance between the fabrication holes 22 and the central axis of the turntable 2 is equal to the distance between the threaded hole in the bearing outer ring 541 and the central axis of the bearing outer ring, so that an operator can fix the bearing outer ring 541.

As shown in fig. 1, a circular guide hole 21 is formed in the middle of the turntable 2, a guide cylinder 66 is arranged at an opening in the middle of the bearing seat 12, the guide cylinder 66 is cylindrical, and the outer side wall of the guide cylinder 66 is tightly connected with the inner side wall of the guide hole 21 through a key. The top edge of the guide cylinder 66 is also provided with a conical surface to facilitate the installation of the guide cylinder 66 with the guide hole 21. Referring to fig. 2, the guide cylinder 66 is a part of the lifting mechanism, and the lifting mechanism further includes a lifting motor 61, a lifting screw 62, a transmission case 63, and a lifting cylinder 64. The lifting motor 61 is positioned in the base cabin base 1 and is electrically connected with the controller, the transmission box 63 is positioned at the lower side of the lifting motor 61, and the output shaft of the lifting motor 61 extends downwards into the transmission box 63. The bottom of the lifting screw 62 also extends into the transmission case 63, and the transmission case 63 is internally provided with a gear transmission assembly, so that the transmission connection between the lifting motor 61 and the lifting screw 62 is realized, and the purposes of speed reduction and transmission are achieved. The lifting cylinder 64 is cylindrical, is sleeved on the top of the lifting screw 62 and is in threaded fit with the lifting screw 62; the top of the lifting cylinder 64 is provided with a circular connecting disc 65, the middle part of the connecting disc 65 is fixed with the top of the lifting cylinder 64, and the edge of the upper surface of the connecting disc 65 is fixed with the bottom of the guide cylinder 66. When the lifting motor 61 is started, the lifting screw 62 is driven to rotate, so that the lifting cylinder 64 is driven to move up and down on the lifting screw 62, the guide cylinder 66 and the rotary table 2 are driven to lift, the height of the left cutting arm 3 and the height of the right cutting arm 4 are adjusted, and the boring and milling processing is facilitated. The turntable 2 is further provided with a top cover 23, the top cover 23 is cylindrical, one end of an opening of the top cover 23 is clamped with the top of the guide hole 21, an annular flange is integrally formed on the outer side wall of the top cover 23, and the flange covers a gap between the top cover 23 and the guide hole 21, so that the isolation and protection effects are achieved.

As shown in fig. 1 and 2, two bearing hydraulic cylinders 68 are further arranged in the base bin base 1, the bottoms of the two bearing hydraulic cylinders 68 are fixed with the inner bottom surface of the base bin base 1, and the tops of the two bearing hydraulic cylinders 68 are abutted against the inner top surface of the central cylinder 11, so that the weight of the rotary table 2 and the central cylinder 11 is balanced, and the lifting mechanism is prevented from being damaged due to overlarge pressure. Still be equipped with two vertical slide rails 69 on the lateral wall of a center section of thick bamboo 11, vertical slide rail 69 top and bearing frame 12 lower surface are fixed, and the side slides with a 11 lateral wall of a center section of thick bamboo and is connected, and each vertical slide rail 69 slides on the cooperation and has two vertical slider 691, and vertical slider 691 passes through flange joint with base storehouse seat 1 the one side of a back of a center section of thick bamboo 11.

A damping slide block made of damping materials is further fixed on the inner wall of the base bin seat 1, the surface of one side, facing the central cylinder 11, of the damping slide block is tightly abutted against the outer side wall of the central cylinder 11, and a lubricating oil channel is formed in the damping slide block. An oil pipe is fixed on the base bin seat 1, one end of the oil pipe extends into the base bin seat 1 and is communicated with the lubricating oil channel, the other end of the oil pipe extends to the outside of the base bin seat 1 and is communicated with an oil pump (not shown), and the oil pump conveys lubricating oil to the damping slide block, so that heat generated when the damping slide block absorbs vibration is reduced, and the service life of the damping slide block is prolonged.

The implementation principle of the embodiment is as follows: when a workpiece needs to be machined, an operator only needs to write a machining procedure into a programming language and input the programming language into the controller, and the controller controls the rotation mechanism and the lifting mechanism to operate and controls the movement of the cutters on the left cutting arm 3 and the right cutting arm 4 so as to machine the workpiece; and the cutters on the left cutting arm 3 and the right cutting arm 4 can be operated simultaneously, thereby realizing rapid processing.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A tower type boring and milling machining center comprises a base bin seat (1) and a controller installed on the base bin seat (1), and is characterized in that a cavity is formed in the middle of the base bin seat (1), a liftable center barrel (11) is arranged in the cavity, a bearing seat (12) is fixed at the top of the center barrel (11), a rotary table (2) is rotatably connected onto the bearing seat (12), left cutting arms (3) and right cutting arms (4) used for bearing milling cutters are symmetrically arranged on two sides of the rotary table (2), a lower base (31) is arranged on each left cutting arm (3) in a sliding mode, an upper base (32) is fixed onto each lower base (31), and a cutter seat (35) provided with a boring cutter is arranged on each upper base (32) in a sliding mode; and one end of the right cutting arm (4) far away from the turntable (2) is rotatably connected with a milling cutter seat (43) provided with a milling cutter, and the right cutting arm (4) is provided with a driving mechanism for driving the milling cutter seat (43) to rotate.

2. The tower type boring and milling machining center according to claim 1, wherein the driving mechanism comprises a driving motor (42) which is fixed at one end of the inside of the right cutting arm (4) close to the rotary table (2) and is electrically connected with the controller, a straight tooth column (421) is connected onto the driving motor (42) in a transmission manner, and a rotating drum (41) with the end part fixed with the milling cutter seat (43) is sleeved on the straight tooth column (421) in a sliding manner.

3. The tower type boring and milling machining center according to claim 2, wherein a square ram (44) connected with the right cutting arm (4) in a sliding manner is further fixed on the outer side wall of the rotating cylinder (41), a sliding motor (45) electrically connected with a controller is arranged on one side of the driving motor (42), a horizontal lead screw (47) is fixed on an output shaft of the sliding motor (45), a horizontal moving block (48) fixed with the side wall of the square ram (44) is in threaded fit on the horizontal lead screw (47), and a fixing seat (46) for fixing the sliding motor (45) is connected to the right cutting arm (4) in a flange manner.

4. The tower type boring and milling machining center of claim 1, wherein the left cutting arm (3) is provided with a sliding groove for sliding the lower base (31) and an X-direction sliding mechanism for driving the lower base (31) to slide, the X-direction sliding mechanism comprises a first driving motor (331) fixed at one end of the sliding groove close to the rotary table (2), an X-direction lead screw (332) is fixed on an output shaft of the first driving motor (331), and a first moving block (333) with the top fixed with the upper base (32) is in threaded fit on the X-direction lead screw (332).

5. The tower type boring and milling machining center according to claim 1, wherein a sliding groove for sliding the tool holder (35) and a Y-direction driving mechanism (34) for driving the tool holder (35) to slide are arranged on the upper base (32), the Y-direction driving mechanism (34) comprises a second driving motor (341) fixed at one end of the sliding groove, a Y-direction lead screw (342) is fixed on an output shaft of the second driving motor (341), and a second moving block (343) with the top fixed with the tool holder (35) is in threaded fit on the Y-direction lead screw (342).

6. The tower type boring and milling machining center according to claim 1, wherein a rotating mechanism for driving the rotary table (2) to rotate is arranged on the base (1), the rotating mechanism comprises a rotating motor (51) which is fixed on the edge of the lower surface of the bearing seat (12) and electrically connected with the controller, an output shaft of the rotating motor (51) extends upwards and penetrates through the bearing seat (12) to be rotatably connected with the bearing seat, a driving gear (52) is fixed on the top of the output shaft of the rotating motor (51), and a driven gear ring (53) meshed with the driving gear (52) is fixed on the lower surface of the rotary table (2).

7. The tower type boring and milling machining center according to claim 1, wherein a composite bearing assembly (54) is arranged between the rotary table (2) and the bearing seat (12), the composite bearing assembly (54) comprises a bearing outer ring (541) fixed with the bearing seat (12) and a bearing inner ring (543) fixed with the rotary table (2), an annular groove (544) is formed in the bearing inner ring (543), the bearing outer ring (541) is sleeved in the annular groove (544), and a plurality of rolling shafts (542) are uniformly paved between the surface of the bearing outer ring (541) and the annular groove (544).

8. The tower type boring and milling machining center according to claim 1, wherein a lifting mechanism for driving the turntable (2) to lift is arranged on the base (1), the lifting mechanism comprises a lifting motor (61) which is located in the central cylinder (11) and electrically connected with the controller, a lifting lead screw (62) which is located in the middle of the central cylinder (11) is in transmission connection with the lifting motor (61), the bottom of the lifting lead screw (62) is rotationally connected with the base (1) and is in threaded fit with the lifting cylinder (64), the top of the lifting cylinder (64) extends out of the central cylinder (11) and is fixed with a guide cylinder (66), and a guide hole (21) which is tightly clamped with the guide cylinder (66) is formed in the center of the turntable (2).