CN109014922B

CN109014922B - High-precision numerical control machining center

Info

Publication number: CN109014922B
Application number: CN201811008878.4A
Authority: CN
Inventors: 马兵; 徐煜
Original assignee: Wuxi Jinge Cnc Equipment Co ltd
Current assignee: Wuxi Jinge Cnc Equipment Co ltd
Priority date: 2018-08-31
Filing date: 2018-08-31
Publication date: 2024-04-02
Anticipated expiration: 2038-08-31
Also published as: CN109014922A

Abstract

The invention discloses a high-precision numerical control machining center, which aims to provide a high-precision numerical control machining center with the advantages of being capable of carrying out quick calibration tool setting after replacing a tool, reducing the interval time required in production and reducing the overall machining efficiency.

Description

High-precision numerical control machining center

Technical Field

The invention relates to the field of precision machining equipment for parts, in particular to a high-precision numerical control machining center.

Background

Machining centers have evolved from numerically controlled milling machines. The greatest difference with the numerical control milling machine is that the machining center has the capability of automatically exchanging machining tools, and the machining tools on the main shaft can be changed through an automatic tool changing device in one clamping process by installing tools with different purposes on the tool magazine, so that multiple machining functions are realized.

The numerical control machining center is a high-efficiency automatic machine tool which consists of mechanical equipment and a numerical control system and is suitable for machining complex parts. The numerical control machining center is one of the numerical control machine tools with highest yield and most wide application in the world at present. After the machined part is clamped once, the numerical control system can control the machine tool to automatically select and replace the cutter according to different working procedures;

the rotating speed and the feeding amount of a main shaft of a machine tool, the movement track of a cutter relative to a workpiece and other auxiliary functions are automatically changed, and the machining surfaces of the workpiece are continuously and automatically subjected to multi-working procedures such as drilling, reaming, boring, tapping, milling and the like. The processing center can intensively and automatically complete various working procedures, so that the manual operation errors are avoided, the adjustment time of workpiece clamping, measuring and machine tools and the turnover, carrying and storage time of the workpieces are reduced, the processing efficiency and the processing precision are greatly improved, and the processing center has good economic benefits. The machining center can be divided into a vertical machining center and a horizontal machining center according to the position of the main shaft in space.

The device has strong comprehensive processing capability, can finish more processing contents after one-time clamping of workpieces, has higher processing precision, is suitable for batch workpieces with medium processing difficulty, has the efficiency which is 5-10 times that of common equipment, can finish processing which cannot be finished by a plurality of common equipment, and is more suitable for single-piece processing or small-medium batch production with complex shape and high precision requirement.

The milling, boring, drilling, tapping, thread cutting and other functions are concentrated on one piece of equipment, so that the milling, boring, drilling, thread cutting and other functions are realized by multiple technological means. The processing center classifies according to the space position of the main shaft during processing: horizontal and vertical machining centers. The method is classified according to the technical purposes: boring and milling machining center, compound machining center. The method is classified according to the special functions: a single table, a dual table and a multi-table machining center. Machining centers with single-axis, double-axis, three-axis and replaceable spindle boxes, etc.

The method comprises the steps of dividing the motion coordinate number of a machining center and the coordinate number controlled simultaneously: there are three-axis two-linkage, three-axis three-linkage, four-axis three-linkage, five-axis four-linkage, six-axis five-linkage, etc. The three-axis and four-axis are the motion coordinate numbers of the machining center, and the linkage is the coordinate numbers of the motion which can be controlled by the control system at the same time, so that the position and speed of the cutter relative to the workpiece are controlled.

At present, chinese patent with publication number CN207668985U discloses a numerical control machining center, which comprises a base, the upper end of base is provided with machining center, machining center is including setting up the Y axle linear guide on the base, one side of the nearly backplate of Y axle linear guide is provided with the sealed cowling, is provided with Y axle servo motor in the sealed cowling, the X axle slider that sets up on Y axle linear guide, be provided with X axle linear guide on the X axle slider, X axle linear guide department is provided with X axle servo motor be provided with the stand on the backplate, Z axle linear guide is provided with Z axle slider on Z axle linear guide, is provided with processing machines and Z axle servo motor on the Z axle slider, Z axle linear guide's bottom is provided with the Z axle stopper.

The numerical control machining center is provided with the main cover in the machining area so as to prevent metal dust pollution. Meanwhile, intelligent control is adopted, the machining efficiency is high, but in the production process, because the machining of one part needs to be subjected to multiple working procedures, different cutters are needed for machining the part, and the numerical control machining center needs a long time for calibrating and setting after replacing the cutters, so that the interval time in production is increased, and the overall machining efficiency is reduced.

Disclosure of Invention

The invention aims to provide a high-precision numerical control machining center which has the advantages of being capable of carrying out quick calibration tool setting after tool replacement, reducing interval time required in production and improving overall machining efficiency.

The technical aim of the invention is realized by the following technical scheme:

the utility model provides a high accuracy numerical control machining center, including the base with encircle the shell of locating on the base, form the processing chamber between shell and the base, be equipped with processing platform and cutter cassette in the processing chamber, it is connected with the division door to slide in the processing chamber, the division door is divided into inner chamber and outer chamber with the processing chamber, the cutter cassette slides through slider perpendicular to horizontal plane and connects in the inner chamber, and set up towards processing platform one side, the slider is including sliding the pole that slides and connect on the processing chamber roof, still be equipped with the fixed angle rotary mechanism that is used for driving cutter cassette fixed angle rotation on the pole that slides, the cutter cassette is connected at the pole end that slides through the rotation axis rotation, fixed angle rotary mechanism is including rotating the initiative carousel of connecting at the pole end that slides and fixing on the rotation axis and with initiative carousel complex driven carousel, still including being used for driving initiative carousel rotatory micro-motor.

Through adopting above-mentioned technical scheme, after machining center accomplished a process, the angle that needs rotatory cutter cassette carries out the switching of cutter, and micro motor's output shaft drives initiative carousel rotation this moment to linkage driven carousel, and owing to be equipped with fixed angle rotary mechanism on the pole that slides, micro motor just can make cutter cassette rotatory certain angle through fixed angle rotary mechanism after rotatory, and fixed cutter on the corresponding angle, just can realize the fixed angle rotation of cutter.

After the machining center finishes a process, only the micro motor is required to be started, the cutter clamping seat can be driven by the fixed angle rotating mechanism to switch the cutter, the cutter replacement and the calibration are rapid and accurate, the required interval time in production is greatly reduced, and the integral machining efficiency of parts is improved.

Further set up: the driven turntable edge is fixed with a plurality of dwells that encircle driven turntable centre of a circle and set up, and the contained angle and the interval between the adjacent dwells are the same, and the quantity and the position of dwells all correspond the quantity and the position setting of cutter on the cutter cassette.

Further set up: the driving turntable is eccentrically provided with an eccentric rod, the eccentric rod and the rotating rod are in linkage rotation through a middle rod, one end of the middle rod is rotationally connected to the eccentric rod, the other end of the middle rod is fixedly provided with a push block for pushing the rotating rod, the push block is in an L-shaped arrangement, and the concave position of the push block corresponds to the arrangement of the rotating rod.

Through adopting above-mentioned technical scheme, when eccentric rod is rotatory, just can drive the middle pole activity to make the dwang on the pusher promote driven carousel, so eccentric rod rotation a round, then driven carousel rotates a check, and the quantity and the position of dwang all correspond with the cutter simultaneously, then can realize the switching of cutter.

Further set up: the rotating shaft is in interference fit with the sliding rod, a baffle plate is fixed on the sliding rod, a pushing spring used for pushing the pushing block to move towards the rotating rod is arranged between the baffle plate and the pushing block, one end of the pushing spring is fixed on the baffle plate, and the other end of the pushing spring is fixedly connected with the pushing block.

Through adopting above-mentioned technical scheme, after the push spring can promote the dwang towards driven carousel to make the ejector pad all the time with different dwang butt.

Further set up: the sliding rod is internally provided with a fastener for locking the rotating shaft, the fastener comprises a fastening gear fixed on the rotating shaft in a coaxial manner and a fastening rack connected in the sliding rod in a sliding manner, the fastening rack is matched with the fastening gear, and the sliding rod is internally provided with a fastening cylinder for pushing the fastening rack to slide.

Through adopting above-mentioned technical scheme, need lock it after the cutter accomplishes the switch, the fastening cylinder starts this moment, drives the fastening rack and slides and mesh with fastening gear, so just can accomplish the locking of fastening gear and rotation axis, and is fixed with driven carousel.

Further set up: the processing platform is including being located the pre-installation platform in the outer chamber and being located the workstation in the inner chamber, and pre-installation platform is connected at the steering mechanism of base intermediate position through rotating with the workstation, and steering mechanism is including rotating the transfer shaft of connecting on the base, and pre-installation platform and workstation are all fixed in the transfer shaft, still are equipped with on the base and are used for driving the transfer shaft and rotate 180 steering piece.

Through adopting above-mentioned technical scheme, can carry out the dismantlement of last batch of part and the pre-installation clamp of next batch of part when processing the part to reduce the required time of clamping, two processes go on together, promote the holistic machining efficiency of part, reduce the extravagant time in the part machining process

Further set up: the isolation door comprises a left door plate and a right door plate which are symmetrically arranged, the left door plate and the right door plate are folding doors, and the isolation door is opened and closed by pushing a starting cylinder fixed on the top wall of the inner cavity, and through grooves for accommodating the processing table are formed in the bottoms of the left door plate and the right door plate.

By adopting the technical scheme, when the workbench rotates, the left door plate and the right door plate are opened through the starting cylinder; when the part machining process is carried out, the starting cylinder drives the left door plate and the right door plate to be closed, and the through groove is arranged to accommodate the workbench

Further set up: the two sides of the base, which are positioned on the workbench, are obliquely provided with a sewage draining groove which is communicated with the outside.

Through adopting above-mentioned technical scheme, can guarantee that the workstation slides along certain orbit, the blowdown groove can make things convenient for numerical control machining center to discharge the piece after the processing simultaneously.

In summary, the invention has the following beneficial effects:

Drawings

The invention is further described below with reference to the accompanying drawings.

FIG. 1 is a structural view of embodiment 1;

FIG. 2 is a schematic view for showing a processing table in example 1;

FIG. 3 is a schematic view for showing a steering mechanism in embodiment 1;

FIG. 4 is a schematic view for showing a processing table in example 2;

fig. 5 is a schematic diagram for a display driving mechanism in embodiment 2;

FIG. 6 is a schematic diagram for showing a load bearing pusher in example 2;

FIG. 7 is a schematic view for showing a fixed angle rotation mechanism in embodiment 3;

FIG. 8 is a schematic view for showing a holding mechanism in embodiment 4;

fig. 9 is a schematic view for showing a fixing member in embodiment 5.

In the figure, 1, a base; 11. a housing; 12. a processing chamber; 121. an inner cavity; 122. an outer cavity; 13. a cutter clamping seat; 14. an isolation door; 141. a left door panel; 142. a right door panel; 143. starting a cylinder; 144. a through groove; 15. a support block; 16. a sewage draining groove; 17. a receiving groove; 171. a slide rail; 2. a processing table; 21. preassembling a table; 22. a work table; 23. a clamping groove; 24. a slideway; 3. a steering mechanism; 31. a middle rotating shaft; 32. a steering member; 321. a driven plate; 322. a driving disk; 323. a motor reducer; 324. a driven plate; 325. a driven rod; 326. a vertical rod; 327. a limit clamping groove; 328. a steering groove; 33. a driving shaft; 34. a driven shaft; 35. a driving worm wheel; 36. a driving worm; 37. bevel gears; 4. a driving mechanism; 41. a slide block; 42. a rotating rod; 43. a linkage rod; 44. a drive spring; 45. a carrying plate; 5. carrying the pushing member; 51. pushing the oil cylinder; 52. a push rod; 6. a slider; 61. a sliding rod; 62. a fixed angle rotating mechanism; 621. a driving turntable; 622. a driven turntable; 623. a micro motor; 624. a rotating lever; 625. an eccentric rod; 626. an intermediate lever; 627. a pushing block; 63. a rotation shaft; 64. a baffle; 65. a pushing spring; 66. a fastener; 661. fastening a gear; 662. fastening a rack; 663. fastening a cylinder; 7. a clamping mechanism; 71. a clamping plate; 72. a clamping groove; 73. a rotating plate; 74. a cylindrical clamping member; 741. a clamping piece; 742. a pinch roller; 75. a common clamping member; 76. a clamping rod; 77. clamping the driving member; 771. clamping a hydraulic cylinder; 772. clamping the motor; 773. clamping a lead screw; 774. a first thread segment; 775. a second thread segment; 776. a sliding block; 78. a rotating motor; 8. a fixing member; 81. a fixing groove; 82. a fixed cylinder; 83. and a fixed block.

Detailed Description

The following describes the embodiments of the present invention further with reference to the drawings.

The technical scheme adopted by the invention is as follows:

embodiment 1, a multifunctional numerical control machining center, as shown in fig. 1, includes base 1 and around locating the shell 11 on the base 1, forms processing chamber 12 between shell 11 and the base 1, is equipped with processing platform 2 and cutter cassette 13 in the processing chamber 12, and processing chamber 12 sliding connection has isolation door 14, and isolation door 14 divides processing chamber 12 into inner chamber 121 and outer chamber 122, and cutter cassette 13 is located inner chamber 121, and processing platform 2 includes pre-installation platform 21 and workstation 22 that are located in inner chamber 121 in outer chamber 122.

As shown in fig. 1, 2 and 3, the processing chamber 12 is integrally cylindrical, the preassembling table 21 and the working table 22 are all semicircular, the bottoms of the preassembling table 21 and the working table 22 are both provided with clamping grooves 23, the base 1 is fixedly provided with a slideway 24 which is arc-shaped and is adapted to the clamping grooves 23, and two sides of the base 1, which are positioned on the working table 22, are obliquely provided to form the sewage draining groove 16. The isolation door 14 comprises a left door plate 141 and a right door plate 142 which are symmetrically arranged, the left door plate 141 and the right door plate 142 are folding doors, and the opening and closing are pushed by a starting air cylinder 143 fixed on the top wall of the inner cavity 121, and through grooves 144 for accommodating the processing table 2 are formed in the bottoms of the left door plate 141 and the right door plate 142.

As shown in fig. 1, 2 and 3, the preassembly table 21 is connected with the workbench 22 through a steering mechanism 3 rotatably connected to the middle position of the base 1, the steering mechanism 3 comprises a rotating shaft 31 rotatably connected to the base 1, both the preassembly table 21 and the workbench 22 are fixed on the rotating shaft 31, a steering member 32 for driving the rotating shaft 31 to rotate 180 ° is further arranged on the base 1, and the steering member 32 comprises a driven disc 321 for driving the rotating shaft 31 to rotate, a driving disc 322 rotatably connected to the base 1 and matched with the driven disc 321, and a motor reducer 323 for driving the driving disc 322 to rotate.

As shown in fig. 1, 2 and 3, the driven plate 321 includes two driven plates 324 which are fan-shaped and symmetrically arranged, and a driven rod 325 which is vertically arranged relative to the driven plates 324, wherein two ends of the driven rod 325 are fixed with vertical rods 326, and the vertical rods 326 are perpendicular to the plane of the driven plates 324 and the driven rods 325. The driving disc 322 is wholly circular, is equipped with the spacing draw-in groove 327 of a plurality of evenly encircling its centre of a circle on the driving disc 322 excircle, and spacing draw-in groove 327 is laminated mutually with the shape of driven piece 324, has seted up between the adjacent spacing draw-in groove 327 and has turned to the groove 328, and the degree of depth of turning to the groove 328 equals the half of driven rod 325 length, and the length of montant 326 is greater than the thickness of driven piece 324.

As shown in fig. 1, 2 and 3, bevel gears 37 meshed with each other are fixed on the output shaft of the motor reducer 323 and the driving worm 36, and a supporting block 15 for limiting the rotation angle of the processing table 2 and for carrying the processing table 2 is further arranged on the base 1. The driving disk 322 is rotatably connected to the base 1 through the driving shaft 33, the driven disk 321 is rotatably connected to the base 1 through the driven shaft 34, the driving worm wheel 35 is coaxially fixed on the driving shaft 33, and the driving worm 36 meshed with the driving worm wheel 35 is rotatably connected to the base 1.

In embodiment 2, as shown in fig. 4, 5 and 6, a numerical control machining center is different from embodiment 1 in that a receiving groove 17 for connecting a preassembling table 21 and a workbench 22 is provided on a base 1, the preassembling table 21 and the workbench 22 are slidably connected in the receiving groove 17, a sliding rail 171 for limiting sliding tracks of the preassembling table 21 and the workbench 22 is provided in the receiving groove 17, the sliding rail 171 is rectangular, and a driving mechanism 4 for driving the preassembling table 21 and the workbench 22 to slide along the shape of the sliding rail 171 is further provided in the base 1.

As shown in fig. 4, 5 and 6, the driving mechanism 4 includes a slider 41 fixed at two ends of the working table 22 and the preassembling table 21, the slider 41 is embedded in the sliding rail 171 and can slide in the sliding rail 171, a rotating rod 42 is rotatably connected at a midpoint position of the sliding rail 171, a linkage rod 43 for driving the slider 41 to move is slidably connected at the tail end of the rotating rod 42, and the tail end of the linkage rod 43 is hinged with the slider 41. The driving spring 44 is sleeved on the linkage rod 43, one end of the driving spring 44 is fixed at the connecting end of the linkage rod 43 and the sliding block 41, the other end is fixed at the tail end of the rotating rod 42, and the sliding distance of the linkage rod 43 in the tail end of the rotating rod 42 is larger than half of the long side of the sliding rail 171. The linkage rod 43 and the driving spring 44 are symmetrically arranged on the rotating rod 42 and are respectively connected with the slider 41 on the preassembling table 21 and the workbench 22.

As shown in fig. 4, 5 and 6, a loading plate 45 for loading the pre-loading table 21 and the working table 22 is further provided in the receiving groove 17, and is rotatably connected in the receiving groove 17 and is rotated by a loading pusher 5 provided in the receiving groove 17. The bearing pushing piece 5 comprises a pushing oil cylinder 51 which is fixed in the accommodating groove 17 perpendicular to the horizontal plane, a push rod 52 is hinged on an output shaft of the pushing oil cylinder 51, a connecting end of the push rod 52 and the pushing oil cylinder 51 is slidingly connected in the accommodating groove 17, and the other end of the push rod is hinged on the bottom surface of the bearing plate 45.

Embodiment 3, as shown in fig. 1 and 7, is different from embodiment 1 or 2 in that the tool holder 13 is slidingly connected in the cavity 121 perpendicular to the horizontal plane by the sliding member 6 and disposed towards one side of the processing table 2, the sliding member 6 includes a sliding rod 61 slidingly connected to the top wall of the processing chamber 12, the sliding rod 61 is further provided with a fixed angle rotating mechanism 62 for driving the tool holder 13 to rotate at a fixed angle, the tool holder 13 is rotatably connected to the end of the sliding rod 61 by the rotating shaft 63, the fixed angle rotating mechanism 62 includes a driving turntable 621 rotatably connected to the end of the sliding rod 61 and a driven turntable 622 fixed to the rotating shaft 63 and matched with the driving turntable 621, and further includes a micro motor 623 for driving the driving turntable 621 to rotate.

As shown in fig. 7, a plurality of rotating rods 624 surrounding the center of the driven turntable 622 are fixed on the edge of the driven turntable 622, the included angles and the intervals between the adjacent rotating rods 624 are the same, and the number and the positions of the rotating rods 624 are corresponding to those of the cutters on the cutter clamping seat 13. The driving turntable 621 is eccentrically provided with an eccentric rod 625, the eccentric rod 625 and the rotating rod 624 are in linkage rotation through a middle rod 626, one end of the middle rod 626 is rotationally connected to the eccentric rod 625, the other end of the middle rod 626 is fixedly provided with a push block 627 for pushing the rotating rod 624, the push block 627 is in an L-shaped arrangement, and the concave position of the push block 627 is corresponding to the rotating rod 624.

As shown in fig. 7, the rotation shaft 63 is in interference fit with the sliding rod 61, a blocking piece 64 is fixed on the sliding rod 61, a pushing spring 65 for pushing the sliding rod 627 to move towards the rotation rod 624 is arranged between the blocking piece 64 and the sliding rod 627, one end of the pushing spring 65 is fixed on the blocking piece 64, and the other end of the pushing spring is fixedly connected with the sliding rod 627. The slide rod 61 is further provided with a fastener 66 for locking the rotary shaft 63, the fastener 66 comprises a fastening gear 661 coaxially fixed on the rotary shaft 63 and a fastening rack 662 slidably connected in the slide rod 61, the fastening rack 662 is matched with the fastening gear 661, and the slide rod 61 is further provided with a fastening cylinder 663 for pushing the fastening rack 662 to slide.

Embodiment 4, a numerical control machining center, as shown in fig. 8, is different from embodiment 1 or 2 or 3 in that, the preassembling table 21 and the working table 22 are provided with clamping members for clamping the parts, the clamping mechanism 7 comprises a clamping plate 71 fixed on the machining table 2, the clamping plate 71 is provided with a plurality of clamping grooves 72 which are arranged in a whole row and are semi-cylindrical, a rotating plate 73 is rotatably connected in the clamping groove 72, one side of the rotating plate 73 is fixed with a cylindrical clamping member 74 for clamping the cylindrical parts, and the other side is fixed with a common clamping member 75 for clamping the regular-shaped parts.

As shown in fig. 8, the cylindrical clamping member 74 and the common clamping member 75 each include two clamping rods 76 that slide symmetrically on the rotating plate 73, the clamping rods 76 are slidably connected to the rotating plate 73 through sliding blocks 776, and the rotating plate 73 is further provided with a clamping driving member 77 for driving the sliding blocks 776 to slide toward or away from each other simultaneously. The clamping driving member 77 comprises a clamping motor 772 fixed on the rotating plate 73, a clamping screw rod 773 is fixed on an output shaft of the clamping motor 772, the clamping screw rod 773 penetrates through two sliding blocks 776 on the same side of the rotating plate 73 and is in threaded connection with the same, a first threaded section 774 and a second threaded section 775 with opposite threads are arranged on the clamping screw rod 773, and the two sliding blocks 776 are respectively located in the first threaded section 774 and the second threaded section 775.

As shown in fig. 8, the cylindrical clamping member 74 includes a clamping piece 741 relatively fixed at the end of the clamping rod 76, the clamping piece 741 is arc-shaped, two clamping wheels 742 symmetrically disposed about the center of the clamping piece 741 are rotatably connected to the clamping piece 741, and anti-slip grains are disposed on the clamping wheels 742. The clamping plate 71 is provided with a rotating motor 78 for driving the rotating plate 73 to rotate, the clamping plate 71 is also provided with a fixing piece 8 for locking the rotating plate 73, the fixing piece 8 comprises fixing grooves 81 formed in two side faces of the adjacent cylindrical clamping piece 74 of the rotating plate 73, a fixing air cylinder 82 is arranged in the clamping groove 72, and an output shaft of the fixing air cylinder 82 is fixedly connected with a fixing block 83 matched with the clamping groove 72.

Embodiment 5, a numerical control machining center, as shown in fig. 9, is different from embodiment 4 in that the clamping driving member 77 includes a plurality of clamping hydraulic cylinders 771 fixed on the rotating plate 73, the output shafts of the clamping hydraulic cylinders 771 are fixed on the sliding block 776, and the clamping hydraulic cylinders 771 are fixed toward the center side of the rotating plate 73.

The foregoing is a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent variation and variation of the above embodiment according to the technical substance of the present invention falls within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a high accuracy numerical control machining center, includes base (1) and surrounds shell (11) of locating on base (1), forms processing chamber (12) between shell (11) and base (1), is equipped with processing platform (2) and cutter cassette (13), its characterized in that in processing chamber (12): the processing chamber (12) is slidably connected with an isolation door (14), the isolation door (14) divides the processing chamber (12) into an inner cavity (121) and an outer cavity (122), the cutter clamping seat (13) is slidably connected in the inner cavity (121) perpendicular to a horizontal plane through a sliding piece (6) and is arranged towards one side of the processing table (2), the sliding piece (6) comprises a sliding rod (61) slidably connected on the top wall of the processing chamber (12), the sliding rod (61) is further provided with a fixed angle rotating mechanism (62) for driving the cutter clamping seat (13) to rotate at a fixed angle, the cutter clamping seat (13) is rotatably connected at the tail end of the sliding rod (61) through a rotating shaft (63), the fixed angle rotating mechanism (62) comprises a driving turntable (621) rotatably connected at the tail end of the sliding rod (61) and a driven turntable (622) fixed on the rotating shaft (63) and matched with the driving turntable (621), and the processing chamber further comprises a micro motor (623) for driving the driving turntable (621) to rotate; the edge of the driven turntable (622) is fixedly provided with a plurality of rotating rods (624) which are arranged around the circle center of the driven turntable (622), the included angles and the intervals between the adjacent rotating rods (624) are the same, and the number and the positions of the rotating rods (624) are corresponding to those of the cutters on the cutter clamping seat (13); the sliding rod (61) is internally provided with a fastener (66) for locking the rotating shaft (63), the fastener (66) comprises a fastening gear (661) coaxially fixed on the rotating shaft (63) and a fastening rack (662) connected in the sliding rod (61) in a sliding way, the fastening rack (662) is matched with the fastening gear (661), and the sliding rod (61) is internally provided with a fastening cylinder (663) for pushing the fastening rack (662) to slide; the driving turntable (621) is eccentrically provided with an eccentric rod (625), the eccentric rod (625) and the rotating rod (624) are in linkage rotation through a middle rod (626), one end of the middle rod (626) is rotationally connected to the eccentric rod (625), the other end of the middle rod is fixedly provided with a pushing block (627) for pushing the rotating rod (624), the pushing block (627) is in an L-shaped arrangement, and the concave position of the pushing block is corresponding to the rotating rod (624).

2. The high precision numerically controlled machining center as set forth in claim 1, wherein: the sliding device is characterized in that the rotating shaft (63) is in interference fit with the sliding rod (61), a baffle (64) is fixed on the sliding rod (61), a pushing spring (65) used for pushing the pushing block (627) to move towards the rotating rod (624) is arranged between the baffle (64) and the pushing block (627), one end of the pushing spring (65) is fixed on the baffle (64), and the other end of the pushing spring is fixedly connected with the pushing block (627).

3. The high precision numerically controlled machining center as set forth in claim 1, wherein: the processing bench (2) comprises a preassembling bench (21) located in an outer cavity (122) and a workbench (22) located in an inner cavity (121), the preassembling bench (21) is connected with the workbench (22) through a steering mechanism (3) which is connected to the middle position of the base (1) in a rotating mode, the steering mechanism (3) comprises a rotating shaft (31) which is connected to the base (1) in a rotating mode, the preassembling bench (21) and the workbench (22) are fixed to the rotating shaft (31), and a steering piece (32) which is used for driving the rotating shaft (31) to rotate 180 degrees is further arranged on the base (1).

4. The high-precision numerically controlled machining center as in claim 3, wherein: the isolation door (14) comprises a left door plate (141) and a right door plate (142) which are symmetrically arranged, the left door plate (141) and the right door plate (142) are folding doors, and the isolation door is opened and closed by pushing a starting cylinder (143) fixed on the top wall of the inner cavity (121), and through grooves (144) for accommodating the processing table (2) are formed in the bottoms of the left door plate (141) and the right door plate (142).

5. The high-precision numerically controlled machining center as set forth in claim 4, wherein: the base (1) is obliquely arranged on two sides of the workbench (22) to form a sewage draining groove (16), and the sewage draining groove (16) is communicated with the outside.