CN212705645U

CN212705645U - Drilling and milling machining center

Info

Publication number: CN212705645U
Application number: CN202020125403.XU
Authority: CN
Inventors: 蒋辉东; 尹建贺; 郑胜华
Original assignee: Xuancheng Jianlin Machinery Co ltd
Current assignee: Xuancheng Jianlin Machinery Co ltd
Priority date: 2020-01-18
Filing date: 2020-01-18
Publication date: 2021-03-16
Anticipated expiration: 2030-01-18

Abstract

The utility model provides a drilling and milling center, a turret is arranged on a case arranged on a frame, the turret and the case form circumferential rotation and axial spacing coordination, and a first driving unit drives the turret to rotate along a rotating shaft core of the turret relative to the case; a locking mechanism is arranged between the tool turret and the case, the tool turret rotates along the rotary shaft core of the tool turret relative to the case when the locking mechanism is unlocked, and the locking mechanism limits the tool turret to rotate along the rotary shaft core of the tool turret relative to the case when the locking mechanism is locked; the peripheral surface of the cutter tower is provided with a plurality of cutting main shafts for clamping cutters at intervals, the rotating shaft core of each cutting main shaft is consistent with the radial direction of the cutter tower, the cutting power output shaft is positioned in the middle of the cavity of the cutter tower, the shaft core direction of the cutting power output shaft is consistent with the radial direction of the cutter tower, and the inner end of the cutting main shaft and one end of the cutting power output shaft form the mutually embedded matching of a lug and a groove when the cutting main shaft is rotated to be in concentric position with the cutting power output shaft along with the cutter tower.

Description

Drilling and milling machining center

Technical Field

The utility model belongs to digit control machine tool manufacturing and designing field, concretely relates to brill mills machining center.

Background

Along with the development of the science and technology level, the requirement of the manufacturing industry on the machining precision is higher and higher, and the traditional machining equipment can not meet the increasingly rigorous process requirement, so that the machining equipment with extremely high automation degree, such as a numerical control machine tool, is produced, the numerical control machine tool automatically controls the actions of cutting, feeding and the like of the machine tool through a numerical control system, the accurate control of the cutting amount can be realized, and the production efficiency can be greatly improved. The machining center is a numerical control machine tool with higher automation degree, can combine a plurality of procedures such as milling, drilling and the like, realizes cutting machining by combining position adjustment of a workbench and transposition tool changing of a cutter, and has extremely high automation degree, however, the outstanding advantage is that the machining center has quite high manufacturing and using cost, the selling price of one machining center is often as high as millions or even millions, and common small and medium-sized enterprises cannot bear the high cost.

The applicant is named as a drilling and tapping center granted invention patent (patent number ZL2015105791935), and the core technical scheme is that a first driving unit 30 for driving a cutter head 20 to rotate is arranged on a machine case, a plurality of cutting spindles 23 for clamping cutters are arranged on the circumferential surface of the cutter head 20 at intervals, each cutting spindle 23 is arranged in a radial rotating manner along the cutter head 20, and a gear 24 is arranged at the inner end of each cutting spindle 23; the cutter head 20 is arranged in a telescopic manner along the axis direction of the cutter head, and a second driving unit for driving the cutter head 20 to stretch and retract is arranged on the case 10; the machine case 10 is further provided with a transition gear 41, the transition gear 41 and a third driving unit 40 arranged on the machine case form transmission fit, and the first driving unit 30 and the second driving unit can enable the gear 24 at the inner end of each cutting spindle 23 to be alternately meshed with the transition gear 41 in the process of driving the cutter head 20 to rotate and stretch. Therefore, the gear 24 at the inner end of the cutting spindle 23 is alternatively meshed with the transition gear 41 to transmit cutting power, the cutting spindle 23 axially displaces along with the cutter disc 20 during transposition cutter changing and enables the gear 24 to be separated from the transition gear 41, and the gear 24 is required to be re-meshed with the transition gear 41 after the cutter disc 20 is axially displaced after cutter changing in place. In the above scheme, when gear 24 with transition gear 41 reengages, the crest and the valley counterpoint are difficult to guarantee, have seriously influenced return accuracy after the tool changing, and the tool changing is consuming time and is difficult to control promptly, and in addition, not only will make rotation but also will make axial displacement when the blade disc tool changing, the structure is complicated and the accumulative error is big, and rotation spacing and axial spacing in addition all rely on fluted disc quotation processing, cooperation precision, so the position precision of cutting main shaft 23 is lower, and the natural machining precision receives serious influence.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a drilling and milling machining center of miniaturization, multipurpose, the response of tool changing action is timely, accurate and machining precision is high.

In order to achieve the above purpose, the utility model provides a following technical scheme: a drilling and milling center is characterized in that a cutter tower is arranged on a case arranged on a rack, the cutter tower and the case form circumferential rotation and axial limiting fit, and a first driving unit drives the cutter tower to rotate along a rotary shaft core of the cutter tower relative to the case;

a locking mechanism is arranged between the tool turret and the case, the tool turret rotates along the rotary shaft core of the tool turret relative to the case when the locking mechanism is unlocked, and the locking mechanism limits the tool turret to rotate along the rotary shaft core of the tool turret relative to the case when the locking mechanism is locked;

the peripheral surface of the tool turret is provided with a plurality of cutting main shafts for clamping tools at intervals, the rotating shaft core of each cutting main shaft is consistent with the radial direction of the tool turret, the cutting power output shaft is positioned in the middle of the cavity of the tool turret, the shaft core direction of the cutting power output shaft is consistent with the radial direction of the tool turret, the inner end of the cutting main shaft and one end of the cutting power output shaft form a mutually embedded matching of a lug and a groove when the cutting main shaft is rotated to be in concentric position with the cutting power output shaft along with the tool turret, and the matching surface of the groove wall and the lug mutually matched with the groove wall is parallel to the rotating surface of the tool turret.

The technical effects of the utility model reside in that: the multiple cutting spindles on the tool turret can be selectively provided with cutters of different types and specifications meeting the cutting requirements, so that the requirements of drilling and milling processing are met; the tool changing action of the tool turret is realized by the rotating action of the tool turret, so that the timely response of the tool changing operation is ensured, the positioning error caused by axial displacement is eliminated due to the axial displacement action of the tool turret, and the position precision of the cutting spindle is naturally ensured; and when the cutting main shaft is rotated to be in the same core position with the cutting power output shaft along with the turret, the inner end of the cutting main shaft and one end of the cutting power output shaft form the mutually embedded matching of a lug and a groove, so that the matching and the separation of the cutting main shaft and the cutting power output shaft are ensured, the timeliness of tool changing response is further improved, the structure is thoroughly simplified, the essential difficulty of re-alignment of separation and meshing between gears is eliminated, the inherent design of the gear transmission mechanism for transmitting cutting power, which is commonly adopted in the prior art, is thoroughly abandoned, the timely combination and separation of the cutting main shaft and the cutting power output shaft during each tool changing is ensured, and the accuracy of tool changing is ensured.

Drawings

FIG. 1 is a schematic view of the three-dimensional structure of the present invention;

fig. 2 is a schematic view of the internal structure of the present invention;

fig. 3 is a schematic perspective view of the transmission mechanism of the present invention;

fig. 4 is a schematic sectional structure of the present invention;

FIG. 5 is a front view of the turret; FIG. 6 is a schematic sectional view A-A of FIG. 5;

FIG. 7 is a perspective view of the housing;

FIG. 8 is a cross-sectional view of the enclosure;

FIG. 9 is a perspective view of the cylinder of the locking mechanism;

fig. 10 and 11 are schematic perspective views of the power output portion.

Detailed Description

As shown in fig. 1, 2, 3, and 4, in a drilling and milling center, a case 10 disposed on a rack is provided with a turret 20, the turret 20 and the case 10 form a circumferential rotation and axial limit fit, and a first driving unit 30 drives the turret 20 to rotate along a rotation axis of the turret 20 relative to the case 10; the scheme limits the axial displacement of the cutter tower 20, reduces the position error in one degree of freedom direction, provides an axially determined positioning reference for positioning the cutter, and realizes the conversion of cutter changing positions by rotating the cutter tower 20 around the rotary shaft core.

A locking mechanism is arranged between the turret 20 and the case 10, when the locking mechanism is unlocked, the turret 20 rotates relative to the case 10 along the rotary shaft core of the turret 20, and when the locking mechanism is locked, the rotation of the turret 20 relative to the case 10 along the rotary shaft core of the turret 20 is limited; the tool turret 20 can be adjusted to the proper position by completing the transposition, and the position of the tool turret is locked by a locking mechanism after the tool changing position is adjusted to the proper position, so that the cutting can be ensured.

The peripheral surface of the turret 20 is provided with a plurality of cutting spindles 21 for clamping tools at intervals, the rotating shaft core of each cutting spindle 21 is consistent with the radial direction of the turret 20, the cutting power output shaft 41 is positioned in the middle of the cavity of the turret 20, the shaft core direction of the cutting power output shaft 41 is consistent with the radial direction of the turret 20, when the cutting spindle 21 is displaced to be in the same core position with the cutting power output shaft 41 along with the turret 20, the inner end of the cutting spindle 21 and one end of the cutting power output shaft 41 form a lug-groove mutual embedded type fit, and the matching surfaces on the groove wall of the groove and the lug matched with the groove wall are parallel to the rotating surface of the turret 20.

In the above solution, the position of the cutting power output shaft 41 is determined, and when one of the cutting spindles 21 and the cutting power output shaft 41 are concentric and the end portion forms a mutually-embedded fit of the protrusion and the groove, the torque can be transmitted, that is, the cutting power output shaft 41 drives the cutting spindle 21 to rotate, and the cutter on the cutting spindle 21 performs cutting rotation. The structure of the mutually matched convex block and the groove is beneficial to the clamping of the convex block and the groove and is convenient for the separation of the convex block and the groove, namely, on the premise that the position of the shaft core of the cutting power output shaft 41 is kept fixed, the surface of the shaft core of the cutting main shaft 21 keeps consistent with the shaft core of the cutting power output shaft 41 in the rotation process of the cutter tower 20, in other words, the moving track of the shaft core of the cutting main shaft 21 is that the annular surface always corresponds to the position of the cutting power output shaft 41, and the separation and combination actions of the cutting main shaft 21 and the cutting power output shaft 41 are naturally completed in the transposition process of the cutter tower 20.

Referring to fig. 5 and 6, the turret 20 is integrally in a basin shape, a turret connection sleeve 22 is connected to a basin mouth at the back of the turret 20, the turret connection sleeve 22 is consistent with the rotation center of the turret 20, and the turret connection sleeve 22 extends to the side of the case 10 and forms a circumferential rotation and axial limit fit with the case 10. In order to realize that the rotation action of the turret 20 limits the axial displacement thereof at the same time, the utility model provides an optimal scheme, set up the turret adapter sleeve 22 promptly and extend to one side of the chassis 10 and be connected with the rotary type of the chassis 10, guaranteed the basin-shaped basic form of the turret 20 like this and conveniently arranged the cutting spindle 21, realized the support position of running fit again, because the turret adapter sleeve 22 adopts the pipe fitting shape, its reliable bending resistance can guarantee the posture stability in the transposition process of the turret 20, thus further guarantee the precision of the cutting spindle 21 position, this accurate counterpoint of the cutting spindle 21 and cutting power take-off shaft 41 when also being favorable to the tool changing; especially, the stability of the position of the cutting spindle 21 in the cutting process is ensured, and the improvement of the machining precision is guaranteed.

As shown in fig. 3, an outer gear ring 23 is disposed outside the turret connecting sleeve 22 in the radial direction, the outer gear ring 23 is engaged with the first output gear 31 of the first driving unit 30, and the first motor 32 of the first driving unit 30 drives the first output gear 31 to rotate through the first belt transmission mechanism.

The first driving unit 30 comprises a first motor 32, and a transmission mechanism consisting of a first toothed belt 33 is arranged between a motor shaft of the first motor 32 and the first output gear 31;

the first output gear 31 is arranged at one end of a first gear shaft 34, a first input toothed wheel 35 is arranged at the other end of the first gear shaft 34, a toothed wheel 36 is connected to a motor shaft of the first motor 32, and the first input toothed wheel 35, the toothed wheel 36 and the first toothed belt 33 are meshed to form a first belt transmission mechanism.

The matching mode that the outer gear ring 23 and the first output gear 31 are meshed in the scheme is adopted to realize the rotation of the outer gear ring 23, the angle of the tool turret 20 required to be indexed during indexing and tool changing can be accurately controlled, meanwhile, the outer gear ring 23 is arranged outside the radial direction of the tool turret connecting sleeve 22, a bearing installation and arrangement space is provided for the rotation support of the tool turret connecting sleeve 22, and namely, a tool turret support bearing 221 is arranged between the outer wall of the tool turret connecting sleeve 22 and the case 10.

In the above scheme, the cutting power output shaft 41 is required to be arranged in the middle of the cavity of the turret 20 and fixed in position, so that the cutting power output shaft 41 can be in clutch fit with the cutting main shaft 21 to transmit cutting torque, in order to enable the cutting power output shaft 41 to obtain rotation torque, the preferable scheme is that the case 10 is connected with the central shaft sleeve 40, the overhanging end of the central shaft sleeve 40 is arranged in the cavity of the basin-shaped turret 20, the cutting power output shaft 41 is rotatably arranged at the overhanging end of the central shaft sleeve 40, and the cutting power transmission mechanism is connected to the cutting power output shaft 41 through the inner end of the central shaft sleeve 40 and drives the cutting power output shaft 41 to rotate. The central shaft sleeve 40 is naturally tubular, the space is saved by using the pipe cavity arrangement transmission mechanism, and the bending resistance of the pipe wall is used as a fixed supporting unit of the cutting power output shaft 41, so that the position precision of the cutting power output shaft 41 is improved, the phenomenon of shaft core deviation of the cutting power output shaft 41 caused by the reaction force in the machining process is resisted, and the machining precision is further improved. The arrangement of the turret support bearing 221 satisfies the axial basic limit when the turret 20 performs tool changing and indexing, and also provides an axial displacement clearance when the turret 20 is locked, which is combined with fig. 4 and 8.

In order to ensure that the torque is transmitted from the motor to the cutting power output shaft 41, as shown in fig. 3, 4, 10 and 11, a transmission mechanism of a toothed belt is adopted because the space interval is large, namely, a cutting motor 45 is arranged on the machine case 10, a cutting power input shaft belt wheel 42 is arranged at the motor shaft end of the cutting motor 45, a cutting power output shaft belt wheel 43 is connected to the cutting power output shaft 41, and a belt transmission mechanism formed by meshing the cutting power input shaft belt wheel 42, the cutting power output shaft belt wheel 43 and the cutting power toothed belt 44 is the cutting power transmission mechanism. The cutting power transmission mechanism is arranged by means of the space of the pipe cavity of the central shaft sleeve 40, and the toothed belt not only ensures the advantages of light weight and low cost, but also overcomes the defects of noise and necessary lubrication of gear transmission. Especially, the cutting power is transmitted by adopting a toothed belt, and the pointed position of a convex block or a groove part at the shaft end of the cutting power output shaft 41 can be conveniently and accurately controlled when the cutting power output shaft changes the cutter stop position, so that accurate and timely cutter changing is realized. The rotation number of the cutting power output shaft 41 is increased to 6000 rpm from 4000 rpm, and the hole diameter of the drill hole is increased to 24mm from 16 mm.

In order to further improve the cutting precision, a central shaft sleeve bearing 46 is arranged between the inner wall of the cutter tower connecting sleeve 22 and the outer wall of the central shaft sleeve 40. Namely, the central shaft sleeve bearing 46 is additionally arranged at the end part of the central shaft sleeve 40 far away from the machine case 10, so that the suspended end of the central shaft sleeve 40 which originally has proper bending resistance is additionally supported by the central shaft sleeve bearing 46, and the deformation disturbance degree of the end where the cutting power output shaft 41 is arranged is further reduced.

The utility model discloses a another main point is the location problem after the turret 20 transposition, the utility model provides a following preferred scheme:

the cutter tower 20 is integrally basin-shaped, a limit fluted disc 24 is arranged on the side of the back of the cutter tower 20, and a locking mechanism for limiting the rotation of the limit fluted disc 24 is arranged between the case 10 and the limit fluted disc 24.

The annular limiting fluted disc 24 is arranged on the radial inner side of the outer gear ring 23, the outer end face of the limiting fluted disc 24 is attached to and matched with the limiting face of the case 10, rectangular or trapezoidal teeth 241 are arranged on the inner end face of the limiting fluted disc 24, the tooth space direction is consistent with the radial direction, and the locking fluted disc 50 of the locking mechanism forms locking matching of embedding of the teeth and the grooves when axially displacing towards the limiting fluted disc 24 or is separated into an unlocking state when axially displacing back to back.

A cutter tower sleeve 25 is arranged on the back of the cutter tower 20, the cutter tower sleeve 25 is arranged outside the cutter tower connecting sleeve 22 in a surrounding mode with the same core, the end portion of the cutter tower sleeve 25 is connected with a limiting fluted disc 24 and an outer gear ring 23, and a locking fluted disc 50 is arranged in a pipe cavity area between the cutter tower connecting sleeve 22 and the cutter tower sleeve 25.

Above-mentioned scheme, it needs to emphasize the utility model discloses rely on the outer terminal surface of spacing fluted disc 24 and the spacing face of quick-witted case 10 to paste to lean on the cooperation, just also realize and guaranteed the definite of the position relation between whole sword tower 20 assembly and the quick-witted case 10, adopt the outer terminal surface of spacing fluted disc 24 and the spacing face of quick-witted case 10 to paste to lean on the axial position of the complex mode and prescribe a limit to sword tower 20, show the positioning accuracy who has improved under the sword tower 20 cutting state to guarantee the cutting machining precision.

The details of the locking mechanism are described in detail below.

As shown in fig. 8 and 9, the locking fluted disc 50 is fixed on a cylinder body 51 of the cylinder, a piston 52 matched with the cylinder body 51 is arranged on a piston tube 53, the turret casing tube 25 is concentrically arranged outside the turret connecting sleeve 22, the end part of the turret casing tube 25 is connected with a limit fluted disc 24 and an outer gear ring 23, one end of the piston tube 53 is fixed on the case 10, the other end extends into a tube cavity area between the turret connecting sleeve 22 and the turret casing tube 25, and the locking fluted disc 50 and the limit fluted disc 24 are driven to form two matching states of tooth, groove combination or separation when the axis of the cylinder body 51 moves.

The above scheme is that the cylinder body 51 is designed as a moving part, the conventional piston rod is designed as a tubular shape to form the piston tube 52, the lumen of the piston tube 52 is used for arranging and accommodating the turret connecting sleeve 22 and reliably performing circumferential rotation and axial limit support, and the specific structure is as shown in the figure, turret support bearings 221 are respectively arranged at two positions between the cavity positions of the piston tube 52 and the case 10 and the turret connecting sleeve 22, so that the rotary support of the turret connecting sleeve 22 is realized, and certainly, the rotary support of the turret 20 is realized; in addition, a precondition guarantee is provided for reserving a pipe diameter with enough size for the pipe cavity of the cutter tower connecting sleeve 22, and a space path is reserved for arranging a cutting power transmission mechanism; and the cylinder assembly is arranged in the pipe cavity area between the cutter tower connecting sleeve 22 and the cutter tower sleeve 25, so that the pipe body parts on the fixed part and the rotating part are reasonably sleeved, and the limited space is utilized to the maximum extent.

More preferably, the fixed gear 11 is arranged, that is, the fixed gear 11 is arranged on the chassis 10 in the inner ring area of the limit gear 24, the end surface of the fixed gear 11 has teeth and grooves arranged alternately, and the locking state of the limit gear 24 is formed when the tooth grooves of the locking gear 50 are simultaneously engaged with the tooth grooves on the limit gear 24 and the fixed gear 11.

The radial dimension of the locking fluted disc 50 is consistent with the sum of the radial dimensions of the limiting fluted disc 24 and the fixed fluted disc 11, and the tooth form, the groove form and the dimension are mutually matched.

The housing 10 or the fixed gear 11 is provided with a guide rod or pin 111 for limiting the circumferential rotation of the locking gear 50.

In the above solution, the fixed toothed disc 11 is fixedly disposed on the chassis 10, so the position thereof is stable and reliable, and when the teeth or grooves on the locking toothed disc 50 are engaged with the teeth or grooves on the fixed toothed disc 11, the teeth or grooves are also engaged with the teeth or grooves on the limiting toothed disc 24, so the circumferential position of the limiting toothed disc 24 is reliably limited, and the circumferential position is attached to the chassis 10 in the axial direction, so the position of the turret 20 is reliably and accurately determined, which provides a positioning reference for improving the processing accuracy.

For the action of realizing cylinder body 51, and avoid arranging the oil circuit on the cylinder body, the utility model provides a brand-new oil circuit passageway, the intercommunication has first oil circuit way 531, second oil circuit way 532 on the pipe wall of piston pipe 53 promptly, and the outer end of first oil circuit way 531, second oil circuit way 532 extends to on the terminal surface that piston pipe 53 and quick-witted case 10 are connected and continuous with quick-witted case 10 oil circuit 12, and the inner end of first oil circuit way 531, second oil circuit way 532 extends to piston 52 both sides position respectively.

Avoid taking place the rotation when guaranteeing the cylinder body 51 to remove, ensure that the cylinder body only does axial displacement and no circumferential direction all the time promptly, the utility model discloses a following preferred spacing scheme, promptly pin 111 connect on fixed fluted disc 11 and along cylinder axial overhang arrangement, the end of overhang is inserted and is arranged in the downthehole of locking fluted disc 50. In the above solution, the teeth on the fixed gear plate 11 are always opposite to the grooves on the fixed gear plate 11, but the distance between the teeth and the grooves changes as the cylinder 51 moves.

Preferred embodiments of the knife changing mechanism are described below.

The overhanging end of the central shaft sleeve 40 is provided with a limit ring 47 with a circular ring opening shape, the shaft end of the cutting power output shaft 41 is provided with a U-shaped groove 411, the shaft end of the cutting main shaft 21 matched with the U-shaped groove 411 is a convex flat square head 211, one side surface of the flat square head 211 is abutted against the outer side end surface of the limit ring 47 to limit the rotation of the cutting main shaft 21 in the matching process, the groove wall at one side of the U-shaped groove 411 of the cutting power output shaft 41 is positioned at the opening of the limit ring 47, and the inner wall surface of the groove wall can be positioned at the position flush with the outer side end surface of the.

The scheme ensures that the cutting spindle 21 and the cutting power output shaft 41 are accurately and reliably butted or are called to be clutched, namely the limiting ring 47 in the scheme ensures that the position of the flat square head 211 on the cutting spindle 21 beside the cutting power output shaft 41 is always in a determined posture, and the through direction of the U-shaped groove 411 on the cutting power output shaft 41, which is called as the groove length direction, is consistent with the groove length direction, so that the flat square head 211 on the cutting spindle 21 in the U-shaped groove 411 can be sent out when the cutter tower 20 is shifted, and the flat square head 211 on the next cutting spindle 21 can be smoothly sent in.

The utility model discloses a brill mills machining center can make into independent assembly, and the adaptation is on the lathe of multiple lathe bed, like on vertical, horizontal or planer-type lathe bed, the processing of the hole or the face at the many positions of work piece is accomplished to anchor clamps centre gripping work piece on the cooperation workstation.

Claims

1. The utility model provides a bore and mill machining center which characterized in that: a cutter tower (20) is arranged on a case (10) arranged on the rack, the cutter tower (20) and the case (10) form circumferential rotation and axial limit fit, and a first driving unit (30) drives the cutter tower (20) to rotate along a rotary shaft core of the cutter tower (20) relative to the case (10);

a locking mechanism is arranged between the turret (20) and the case (10), the turret (20) rotates along the rotary shaft core of the turret (20) relative to the case (10) when the locking mechanism is unlocked, and the turret (20) is limited to rotate along the rotary shaft core of the turret (20) relative to the case (10) when the locking mechanism is locked;

the peripheral surface of the turret (20) is provided with a plurality of cutting spindles (21) for clamping tools at intervals, the rotating shaft core of each cutting spindle (21) is consistent with the radial direction of the turret (20), the cutting power output shaft (41) is positioned in the middle of the cavity of the turret (20), the shaft core direction of the cutting power output shaft (41) is consistent with the radial direction of the turret (20), when the cutting spindles (21) are displaced to be in the same core position with the cutting power output shaft (41) along with the turret (20), the inner end of the cutting spindles (21) and one end of the cutting power output shaft (41) form a lug-groove mutual embedded matching mode, and the matching surfaces on the groove wall of the groove and the lug mutually matched with the groove wall are parallel to the rotating surface of the turret (20).

2. The drilling and milling machining center of claim 1, wherein: the whole body of the turret (20) is in a basin shape, a turret connecting sleeve (22) is connected to a basin opening on the back surface of the turret (20), the turret connecting sleeve (22) is consistent with the rotation center of the turret (20), and the turret connecting sleeve (22) extends towards the side where the case (10) is located and is arranged to form circumferential rotation and axial limiting fit with the case (10).

3. The drilling and milling center of claim 2, wherein: an outer gear ring (23) is arranged on the outer portion of the radial direction of the cutter tower connecting sleeve (22), the outer gear ring (23) is meshed with a first output gear (31) of the first driving unit (30), and a first motor (32) of the first driving unit (30) drives the first output gear (31) to rotate through a first belt transmission mechanism.

4. The drilling and milling center of claim 3, wherein: the first driving unit (30) comprises a first motor (32), and a transmission mechanism formed by a first toothed belt (33) is arranged between a motor shaft of the first motor (32) and a first output gear (31);

the first output gear (31) is arranged at one end of a first gear shaft (34), the other end of the first gear shaft (34) is provided with a first input toothed wheel (35), a motor shaft of the first motor (32) is connected with a toothed wheel (36), and the first input toothed wheel (35), the toothed wheel (36) and the first toothed belt (33) are meshed to form a first belt transmission mechanism.

5. The drilling and milling center of claim 2, wherein: a turret supporting bearing (221) is arranged between the outer wall of the turret connecting sleeve (22) and the case (10).

6. The drilling and milling machining center of claim 1, wherein: the machine case (10) is connected with a central shaft sleeve (40), the overhanging end of the central shaft sleeve (40) is arranged in the cavity of the basin-shaped knife tower (20), the cutting power output shaft (41) is rotatably arranged at the overhanging end of the central shaft sleeve (40), and the cutting power transmission mechanism is connected to the cutting power output shaft (41) through the inner end of the central shaft sleeve (40) and drives the cutting power output shaft (41) to rotate in a cutting mode.

7. The drilling and milling machining center according to claim 1 or 6, wherein: the machine box (10) is provided with a cutting motor (45), a cutting power input shaft belt wheel (42) is arranged at the motor shaft end of the cutting motor (45), a cutting power output shaft belt wheel (43) is connected to a cutting power output shaft (41), a belt transmission mechanism formed by meshing the cutting power input shaft belt wheel (42), the cutting power output shaft belt wheel (43) and a cutting power toothed belt (44) is the cutting power transmission mechanism, and a central shaft sleeve bearing (46) is arranged between the inner wall of the cutter tower connecting sleeve (22) and the outer wall of the central shaft sleeve (40).

8. The drilling and milling machining center of claim 1, wherein: the cutter tower (20) is integrally basin-shaped, a limit fluted disc (24) is arranged on the side of the back of the cutter tower (20), and a locking mechanism for limiting the rotation of the limit fluted disc (24) is arranged between the case (10) and the limit fluted disc (24).

9. The drilling and milling machining center according to claim 3 or 8, wherein: annular spacing fluted disc (24) are arranged in the radial inboard of outer ring gear (23), and the outer terminal surface of spacing fluted disc (24) pastes the cooperation with the spacing face of quick-witted case (10) is leaned on, and rectangle or trapezoidal tooth (241) and tooth's socket direction are unanimous with radial direction have been arranged to the medial surface of spacing fluted disc (24), constitute locking fluted disc (50) of locking mechanism and constitute the locking cooperation of tooth, groove gomphosis when moving towards spacing fluted disc (24) along the axial or separate for the unblock state when moving along the axial back to back.

10. The drilling and milling center of claim 9, wherein: a cutter tower sleeve (25) is arranged on the back of the cutter tower (20), the cutter tower sleeve (25) is arranged outside a cutter tower connecting sleeve (22) in a surrounding mode with the core, the end portion of the cutter tower sleeve (25) is connected with a limiting fluted disc (24) and an outer gear ring (23), and a locking fluted disc (50) is arranged in a tube cavity area between the cutter tower connecting sleeve (22) and the cutter tower sleeve (25).

11. The drilling and milling center of claim 10, wherein: the locking fluted disc (50) is fixed on a cylinder body (51) of the oil cylinder, a piston (52) matched with the cylinder body (51) is arranged on a piston pipe (53), a cutter tower sleeve (25) is arranged outside the cutter tower connecting sleeve (22) in a surrounding way with the core, the end part of the cutter tower sleeve (25) is connected with a limiting fluted disc (24) and an outer gear ring (23), one end of the piston pipe (53) is fixed on a case (10), the other end of the piston pipe extends towards the inner cavity area between the cutter tower connecting sleeve (22) and the cutter tower sleeve (25), and the locking fluted disc (50) and the limiting fluted disc (24) are driven to form two matching states of tooth, groove combination or separation when the axis of the cylinder body (51) moves.

12. The drilling and milling center of claim 11, wherein: a fixed gear disc (11) is arranged on the case (10) in the ring inner area of the limit gear disc (24), teeth and grooves are arranged on the end surface of the fixed gear disc (11) at intervals, and the locking state of the limit gear disc (24) is formed when the tooth grooves of the locking gear disc (50) are simultaneously embedded with the tooth grooves on the limit gear disc (24) and the fixed gear disc (11);

the radial size of the locking fluted disc (50) is consistent with the sum of the radial sizes of the limiting fluted disc (24) and the fixed fluted disc (11), and the tooth form, the groove form and the size are matched with each other;

and a guide rod or pin column (111) for limiting the circumferential rotation of the locking fluted disc (50) is arranged on the chassis (10) or the fixed fluted disc (11).

13. The drilling and milling center of claim 12, wherein: the pipe wall of the piston pipe (53) is communicated with a first oil passage (531) and a second oil passage (532), the outer ends of the first oil passage (531) and the second oil passage (532) extend to the end face, connected with the chassis (10), of the piston pipe (53) and are connected with an upper oil passage (12) of the chassis (10), and the inner ends of the first oil passage (531) and the second oil passage (532) respectively extend to the two sides of the piston (52);

the pin column (111) is connected to the fixed gear disc (11) and arranged in a suspending manner along the axial direction of the oil cylinder, and the suspending end is inserted into a hole of the locking gear disc (50);

an annular oil groove (14) is arranged on the limiting surface of the case (10) which is attached to and matched with the outer end surface of the limiting fluted disc (24), and the oil groove (14) is connected with the oil injection passage.

14. The drilling and milling machining center of claim 1, wherein: a limit ring (47) with an annular opening shape is arranged at the overhanging end of the central shaft sleeve (40), a U-shaped groove (411) is arranged at the shaft end of the cutting power output shaft (41), the shaft end of the cutting main shaft (21) matched with the U-shaped groove (411) is a convex flat square head (211), the rotation of the cutting main shaft (21) is limited in the process that one side surface of the flat square head (211) is attached to and matched with the outer side end surface of the limit ring (47), the groove wall at one side of the U-shaped groove (411) of the cutting power output shaft (41) is positioned at the opening of the limit ring (47), and the inner wall surface of the groove wall can be positioned at the position flush with the outer side end surface of the limit ring.