CN222470837U

CN222470837U - CNC double-head face milling machine

Info

Publication number: CN222470837U
Application number: CN202420265539.9U
Authority: CN
Inventors: 王令红
Original assignee: Jinan Kanghong Machinery Co ltd
Current assignee: Jinan Kanghong Machinery Co ltd
Priority date: 2024-02-01
Filing date: 2024-02-01
Publication date: 2025-02-14
Anticipated expiration: 2034-02-01

Abstract

The utility model relates to a numerical control double-end milling machine, which comprises a frame, wherein a fixed machine head is arranged at one end of the frame, a movable machine head which is matched with the fixed machine head in a sliding manner is arranged on the frame, section centering clamps are respectively arranged at the inner sides of the fixed machine head and the movable machine head, the section is moved from the edge part to the middle part by the clamps in the section saw, double-end milling mechanisms are respectively arranged on the fixed machine head and the movable machine head, the double-end milling mechanisms comprise a main sliding seat which is arranged in a sliding manner longitudinally, a front end milling mechanism is arranged at the front end of the main sliding seat, a rear end milling mechanism is arranged at the rear end of the main sliding seat, the front end milling mechanism and the rear end milling mechanism are matched to carry out end milling on the section, and an end positioning mechanism is transversely arranged on the main sliding seat. Has the advantages of reasonable structural design, large collection capacity, high mechanization degree, high collection efficiency and the like.

Description

Numerical control double-end face milling machine

Technical field:

The utility model relates to the technical field of profile end milling, in particular to a numerical control double-end face milling machine.

The background technology is as follows:

The end milling process is an indispensable process in the production processes of doors and windows, curtain walls, sunlight rooms and the like, and a notch required for assembly is formed by milling the end part of the profile.

In order to improve the end milling efficiency, various attempts are made in the prior art, for example, chinese patent discloses a double-compression small end milling machine (issued to publication number: CN 217394390U), which mainly uses a single head, then uses a group of saw blades to carry out reciprocating saw milling on the end of a section bar, and only can process one end of the section bar at a time, and only uses a group of saw blade milling cutters to carry out reciprocating milling on the end of the section bar, so that the whole end milling efficiency is low, and the batch end milling requirement cannot be met. As another example, chinese patent discloses a double-ended middle end mill (grant bulletin number: CN 210817635U), such end milling equipment uses two heads to perform end milling on two ends of the profile respectively, so that the end milling efficiency of the profile is significantly improved. However, the end milling equipment still adopts a group of saw blade milling cutters to perform end milling, and the profile is usually placed at the front end for the purpose of profile feeding, and is influenced by the stroke of the saw blade milling cutters, the saw blade milling cutters can only feed the end milling, and the saw blade milling cutters can only return to the original path to perform end milling when retreating, so that the further development of the end milling equipment is severely restricted. Therefore, it is very necessary to further optimize the double-head end milling equipment under the existing design concept of double-head end milling, so as to further improve the end milling efficiency.

The foregoing is not necessarily a prior art, and falls within the technical scope of the inventors.

The invention comprises the following steps:

the utility model aims to solve the problems in the prior art and provides a rotary stock for collecting sectional materials according to a frame, which has the advantages of reasonable structural design, large collection capacity, high mechanization degree, high collection efficiency and the like.

The utility model realizes the aim by adopting the following technical scheme:

The numerical control double-end milling machine comprises a frame, frame one end is equipped with fixed aircraft nose, transversely slide in the frame and be equipped with the movable aircraft nose that mills with fixed aircraft nose cooperation end, the inboard of fixed aircraft nose and movable aircraft nose is equipped with the section bar clamp placed in the middle respectively, the clamp is moved the section bar from limit portion to middle part and is fixed a position clamp in the section bar saw, be equipped with the double-end on fixed aircraft nose and the movable aircraft nose respectively and mill the mechanism, the double-end mills the main slide that the mechanism set up including longitudinal sliding, main slide front end is equipped with front end and mills the mechanism, and the rear end is equipped with rear end and mills the mechanism, front end mills mechanism and mills the mechanism cooperation and carry out the end to the section bar and mill processing, transversely be equipped with tip positioning mechanism on the main slide.

The machine is characterized in that a guide rail and a rack are transversely arranged on the machine frame, the movable machine head is arranged on the guide rail, a speed reducer is arranged on the movable machine head, a servo motor is arranged at the input end of the speed reducer, and a gear meshed with the rack is arranged at the output end of the speed reducer.

The fixed aircraft nose is the same with the activity aircraft nose structure, including the rectangle chassis, rectangle chassis inboard is equipped with vertical beam A, rectangle chassis middle part and outside are equipped with vertical beam B respectively, vertical beam A highly is less than vertical beam B highly, and the upper end is equipped with longeron A between two vertical beam A of vertical setting, is equipped with longeron B between two vertical beam B of vertical setting, be equipped with crossbeam A between vertical beam A and the longeron B, be equipped with crossbeam B between two vertical beam B, the section bar anchor clamps set up on longeron A placed in the middle, the main slide adopts hoist and mount mode longitudinal sliding to set up on two longeron B.

The section bar anchor clamps placed in middle is including the cylinder and the guide rail placed in middle of vertical setting on longeron A, be equipped with the slide placed in middle on the guide rail placed in middle, vertical interval is equipped with the reference column and presss from both sides tight cylinder on the slide placed in middle, it is connected with the clamping plate to press from both sides tight cylinder, longeron A middle part is equipped with compresses tightly the seat, it compresses tightly the cylinder to compress tightly vertical being equipped with on the seat, it is equipped with the direction slide rail to compress tightly on the seat, be equipped with the pressure strip on the direction slide rail, the pressure strip is connected with the pressure cylinder.

The double-end milling mechanism comprises a guide rail A arranged on a longitudinal beam B, a main sliding plate is arranged on the guide rail A, a main beam frame is arranged at the lower end of the main sliding plate and positioned between the two longitudinal beams B, the main sliding plate and the main beam frame form a main sliding seat, one of the main sliding seats is provided with a rack A, a speed reducer A is arranged on the main sliding plate, a servo motor A is arranged at the input end of the speed reducer A, and a gear A meshed with the rack A is arranged at the output end of the speed reducer A.

Front end mills mechanism includes the front rail B of vertical setting at main beam frame front end, be equipped with preceding slide B on the front rail B, be equipped with preceding screw seat B and preceding screw B on the preceding slide B, main beam frame upper end is equipped with preceding servo motor B, preceding servo motor B is connected with preceding lead screw B, preceding lead screw B is connected with preceding screw B, transversely be equipped with preceding slider C on the preceding slide B, be equipped with preceding rail C on the preceding slider C, be equipped with preceding slide C on the preceding rail C, be equipped with preceding servo motor C on the preceding slide C, preceding servo motor C is connected with preceding lead screw C, be equipped with preceding screw seat C and preceding screw C on the preceding slide B, preceding lead screw C is connected with preceding screw C, preceding slide C front end is vertical to be equipped with double-end spindle motor A, double-end spindle motor A both ends are equipped with milling cutter A respectively.

The rear end milling mechanism comprises a rear guide rail B vertically arranged at the rear end of a main beam frame, a rear sliding seat B is arranged on the rear guide rail B, a rear screw seat B and a rear screw B are arranged on the rear sliding seat B, a rear servo motor B is arranged at the upper end of the main beam frame, the rear servo motor B is connected with a rear screw B, the rear screw B is connected with the rear screw B, a rear sliding block C is transversely arranged on the rear sliding seat B, a rear guide rail C is arranged on the rear sliding block C, a rear sliding seat C is arranged on the rear guide rail C, a rear servo motor C is connected with a rear screw C, a rear screw seat C and a rear screw C are arranged on the rear sliding seat B, a bearing seat is longitudinally arranged at the front end of the rear sliding seat C, a rotating shaft is rotatably arranged on the bearing seat, a rotating seat is arranged on the inner end of the rotating shaft, a double-head spindle motor B is respectively arranged at two ends of the double-head spindle motor B, a rotating shaft C is arranged at the outer end of the rotating shaft, and a rotary arm C is rotatably connected with a rotary cylinder, and a rotary swing arm C is rotatably driven and a rotary cylinder is rotatably connected with a swing arm.

The end positioning mechanism comprises a mounting plate transversely arranged on the main beam frame, an end positioning cylinder is arranged on the mounting plate and connected with an end positioning plate, a flange linear bearing is arranged on the mounting plate, a guide shaft is arranged on the end positioning plate, and the guide shaft is arranged on the flange linear bearing.

The utility model adopts the structure, and has the following beneficial effects:

according to the application, through designing the profile centering clamp, the profile can be moved from the edge part to the middle part to be clamped and positioned, and due to the structural design, enough end milling space is reserved in front of and behind the profile, so that the end milling can be performed by feeding and retracting the milling cutter, and the end milling efficiency is remarkably improved. Through adopting hoist and mount formula structure installation main slide, can prevent that the end from milling the piece and falling into on the guide rail, effectively protect the guide rail, help guaranteeing operation precision and increase of service life. Through design front end mill mechanism and rear end mill mechanism, realize that two sets of milling cutter carry out the end and mill, not only can satisfy more style's end and mill the processing requirement, but also can show improvement end and mill efficiency.

Description of the drawings:

FIG. 1 is a top view of a numerical control double-ended face milling machine of the present utility model;

FIG. 2 is a schematic diagram of the structure of the numerical control double-end face milling machine of the present utility model;

FIG. 3 is a schematic view of the structure of the stationary and movable handpieces of the present utility model;

FIG. 4 is a schematic view of the centering fixture of the present utility model;

FIG. 5 is a schematic view of the double end milling mechanism of the present utility model;

FIG. 6 is a schematic view of the front end milling mechanism of the present utility model;

fig. 7 is a schematic structural view of the front end milling mechanism of the present utility model, omitting the front slide C;

FIG. 8 is a schematic view of the rear end milling mechanism of the present utility model;

FIG. 9 is a schematic top view of the rear end mill mechanism of the present utility model;

fig. 10 is a schematic structural view of the rear end milling mechanism of the present utility model with the rear slide C omitted;

FIG. 11 is a schematic view of an end positioning mechanism according to the present utility model;

In the figure, 1, frame, 2, fixed head, 201, rectangular underframe, 202, vertical beams a,203, vertical beams B,204, longitudinal beams a,205, longitudinal beams B,206, cross beams a,207, cross beams B,3, movable head, 4, profile centering jigs, 401, centering cylinders, 402, centering rails, 403, centering carriages, 404, positioning columns, 405, clamping cylinders, 406, clamping plates, 407, clamping seats, 408, clamping cylinders, 409, guiding carriages, 410, clamping plates, 5, double end milling mechanisms, 501, main carriages, 502, rails a,503, main carriages, 504, main beams frames, 505, racks a,506, speed reducers a,507, servomotors a,508, gears a,6, front end milling mechanisms, 601, front rails B,602, front carriages B,603, front screw seats B,604, front screws B,606, front screws B,605, front sliders C,608, front guide rail C,609, front slide C,610, front servo motor C,611, front screw C,612, front screw seat C,613, front screw C,614, double-ended spindle motor a,615, milling cutter a,7, rear end milling mechanism, 701, rear guide rail B,702, rear slide B,703, rear screw seat B,704, rear screw B,705, rear servo motor B,706, rear screw B,707, rear slider C,708, rear guide rail C,709, rear slide C,710, rear servo motor C,711, rear screw C,712, rear screw seat C,713, rear screw C,714, bearing housing, 715, rotation shaft 716, rotation seat, 717, double-ended spindle motor B,718, milling cutter B,719, rotation arm 720, rotation driving cylinder, 8, end positioning mechanism, 801, mounting plate 802, end positioning cylinder, end positioning plate 803, 804, flange linear bearing, 805. guide shaft 9, guide rail 10, rack 11, speed reducer 12, servo motor 13, gear, 14, section bar.

The specific embodiment is as follows:

in order to more clearly illustrate the general inventive concept, a detailed description is given below by way of example with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.

Furthermore, the terms "upper," "lower," "transverse," "longitudinal," "vertical," "a," "B," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the location of an indicated technical feature.

In the present invention, unless explicitly stated and limited otherwise, the terms "provided," "configured," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, or indirectly connected via an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

As shown in fig. 1-11, the numerical control double-end milling machine comprises a machine frame 1, one end of the machine frame 1 is provided with a fixed machine head 2, a movable machine head 3 matched with the fixed machine head 2 is arranged on the machine frame 1 in a sliding manner, profile centering clamps 4 are respectively arranged on the inner sides of the fixed machine head 2 and the movable machine head 3, the profile 14 is moved to the middle part from the side part by the clamps 4 in the profile saw to be positioned and clamped, double-end milling mechanisms 5 are respectively arranged on the fixed machine head 2 and the movable machine head 3, the double-end milling mechanisms 5 comprise a main sliding seat 501 which is arranged in a sliding manner in a longitudinal manner, a front end milling mechanism 6 is arranged at the front end of the main sliding seat 501, a rear end milling mechanism 7 is arranged at the rear end of the main sliding seat 501, the front end milling mechanism 6 and the rear end milling mechanism 7 are matched with each other to carry out end milling on the profile 14, and an end positioning mechanism 8 is transversely arranged on the main sliding seat 501. Through the design section bar anchor clamps 4 placed in middle can realize moving the section bar 14 from the limit portion to the middle part and press from both sides tight location, and this structural design makes section bar front and back leave sufficient end mill space, and then can realize that milling cutter feeds and the back can both carry out end mill, is showing improvement end mill efficiency. Through design front end mill mechanism and rear end mill mechanism, realize that two sets of milling cutter carry out the end and mill, not only can satisfy more style's end and mill the processing requirement, but also can show improvement end and mill efficiency.

The machine frame 1 is transversely provided with a guide rail 9 and a rack 10, the guide rail 9 is provided with a movable machine head 3, the movable machine head 2 is provided with a speed reducer 11, the input end of the speed reducer 11 is provided with a servo motor 12, and the output end of the speed reducer is provided with a gear 13 meshed with the rack 10. The servo motor 12 and the gear rack transmission are adopted to realize accurate and rapid driving of the movable machine head to transversely move.

The structure of the fixed machine head 2 is the same as that of the movable machine head 3, the movable machine head comprises a rectangular underframe 201, a vertical beam A202 is arranged on the inner side of the rectangular underframe 201, a vertical beam B203 is arranged in the middle and on the outer side of the rectangular underframe 201 respectively, the vertical beam A202 is smaller than the vertical beam B203 in height, a longitudinal beam A204 is arranged at the upper end between two vertical beams A202 which are longitudinally arranged, a longitudinal beam B205 is arranged between two vertical beams B203 which are longitudinally arranged, a cross beam A206 is arranged between the vertical beam A202 and the longitudinal beam B203, a cross beam B207 is arranged between the two vertical beams B203, a section centering clamp 4 is arranged on the longitudinal beam A204, and a main sliding seat 501 is longitudinally arranged on the two longitudinal beams B205 in a hoisting mode. The specific structures of the fixed nose 2 and the movable nose 3 are given, so that the profile centering fixture 4 is convenient to install and the hoisting type installation of the main sliding seat 501 is realized.

The section centering fixture 4 comprises a centering cylinder 401 and a centering guide rail 402 which are longitudinally arranged on a longitudinal beam A204, the centering guide rail 402 is provided with a centering sliding seat 403, a positioning column 404 and a clamping cylinder 405 are longitudinally arranged on the centering sliding seat 403 at intervals, the clamping cylinder 405 is connected with a clamping plate 406, a pressing seat 407 is arranged in the middle of the longitudinal beam A204, a pressing cylinder 408 is vertically arranged on the pressing seat 407, a guide sliding rail 409 is vertically arranged on the pressing seat 407, a pressing plate 410 is arranged on the guide sliding rail 409, and the pressing plate 410 is connected with the pressing cylinder 408. A specific structure is given to realize the positioning and clamping of the profile 14 from the side portions to the middle portion.

The double-end milling mechanism 5 comprises a guide rail A502 arranged on a longitudinal beam B205, a main sliding plate 503 is arranged on the guide rail A502, a main beam frame 504 is arranged at the lower end of the main sliding plate 503, the main beam frame 504 is arranged between the two longitudinal beams B205, the main sliding plate 503 and the main beam frame 504 form a main sliding seat 501, one of the longitudinal beams B205 is provided with a rack A505, a speed reducer A506 is arranged on the main sliding plate 503, a servo motor A507 is arranged at the input end of the speed reducer A506, and a gear A508 meshed with the rack A505 is arranged at the output end of the speed reducer A506. The servo motor A507 and the gear rack transmission are adopted to realize rapid and accurate longitudinal movement adjustment of the main sliding seat 501 in the hoisting design.

Front end mills mechanism 6 includes the front rail B601 of vertical setting at main beam frame 504 front end, be equipped with preceding slide B602 on the front rail B601, be equipped with preceding screw seat B603 and preceding screw B604 on the preceding slide B602, main beam frame 504 upper end is equipped with preceding servo motor B605, preceding servo motor B605 is connected with preceding lead screw B606, preceding lead screw B606 is connected with preceding screw B604, transversely be equipped with preceding slider C607 on the preceding slide B602, be equipped with preceding guide rail C608 on the preceding slider C607, be equipped with preceding slide C609 on the preceding guide rail C608, be equipped with preceding servo motor C610 on the preceding slide C609, preceding servo motor C610 is connected with preceding lead screw C611, be equipped with preceding screw seat C612 and preceding screw C613 on the preceding slide B602, preceding slide C609 front end is vertical to be equipped with spindle motor A614, spindle motor A both ends are equipped with milling cutter A614 respectively. Adopt servo motor and screw drive to realize carrying out vertical and horizontal regulation to milling cutter A position, and then satisfy diversified end mill demand.

The rear end milling mechanism 7 comprises a rear guide rail B701 vertically arranged at the rear end of the main beam frame 504, a rear sliding seat B702 is arranged on the rear guide rail B701, a rear screw seat B703 and a rear screw B704 are arranged on the rear sliding seat B702, a rear servo motor B705 is arranged at the upper end of the main beam frame 504, the rear servo motor B705 is connected with a rear screw B706, the rear screw B706 is connected with the rear screw B704, a rear sliding block C707 is transversely arranged on the rear sliding seat B702, a rear guide rail C708 is arranged on the rear sliding block C707, a rear sliding seat C709 is arranged on the rear guide rail C708, a rear servo motor C710 is arranged on the rear sliding seat C709, a rear screw seat C712 and a rear screw C713 are arranged on the rear sliding seat B702, a bearing seat 714 is longitudinally arranged at the front end of the rear sliding seat C709, a rotating shaft 715 is arranged on the bearing seat 714 in a rotating way, a rotating shaft motor is arranged at the inner end of the bearing seat, a rotating cylinder seat C716 is arranged at two ends of the rotating shaft C716, a rotating shaft C719 is respectively, and a rotary shaft is arranged at two ends of the rotating seat C718 and a rotary shaft B is respectively connected with a rotary shaft. Adopt servo motor and screw drive to realize carrying out vertical and lateral shifting to milling cutter B and adjust, increase a rotation degree of freedom simultaneously, can realize carrying out 90 rotation regulation to milling cutter B, satisfy the demand that large tracts of land milled the material, further improve end mill efficiency.

The end positioning mechanism 8 comprises a mounting plate 801 transversely arranged on the main beam frame 504, an end positioning cylinder 802 is arranged on the mounting plate 801, the end positioning cylinder 802 is connected with an end positioning plate 803, a flange linear bearing 804 is arranged on the mounting plate 801, a guide shaft 805 is arranged on the end positioning plate 803, and the guide shaft 805 is arranged on the flange linear bearing 804. The end positioning mechanism 8 is used for accurately positioning the end of the profile and providing a reference for end milling.

The above embodiments are not to be taken as limiting the scope of the invention, and any alternatives or modifications to the embodiments of the invention will be apparent to those skilled in the art and fall within the scope of the invention.

The present invention is not described in detail in the present application, and is well known to those skilled in the art.

Claims

1. The numerical control double-end milling machine is characterized by comprising a frame, wherein a fixed machine head is arranged at one end of the frame, a movable machine head which is matched with the fixed machine head in a milling mode is arranged on the frame in a sliding mode, section centering clamps are respectively arranged on the inner sides of the fixed machine head and the movable machine head, the section is moved to the middle portion from the side portion by the clamps in the section saw, double-end milling mechanisms are respectively arranged on the fixed machine head and the movable machine head, each double-end milling mechanism comprises a main sliding seat which is arranged in a sliding mode, a front end milling mechanism is arranged at the front end of each main sliding seat, a rear end milling mechanism is arranged at the rear end of each main sliding seat, the front end milling mechanism and the rear end milling mechanism are matched with each section to conduct end milling processing, and an end positioning mechanism is transversely arranged on each main sliding seat.

2. The numerical control double-end face milling machine according to claim 1, wherein a guide rail and a rack are transversely arranged on the frame, the movable machine head is arranged on the guide rail, a speed reducer is arranged on the movable machine head, a servo motor is arranged at the input end of the speed reducer, and a gear meshed with the rack is arranged at the output end of the speed reducer.

3. The numerical control double-end face milling machine according to claim 2, wherein the fixed machine head and the movable machine head have the same structure and comprise a rectangular underframe, vertical beams A are arranged on the inner side of the rectangular underframe, vertical beams B are respectively arranged on the middle and the outer side of the rectangular underframe, the height of each vertical beam A is smaller than that of each vertical beam B, a longitudinal beam A is arranged at the upper end between two vertical beams A which are longitudinally arranged, a longitudinal beam B is arranged between two vertical beams B which are longitudinally arranged, a cross beam A is arranged between each vertical beam A and each longitudinal beam B, a cross beam B is arranged between each two vertical beams B, a section centering fixture is arranged on each longitudinal beam A, and a main sliding seat is longitudinally arranged on each two longitudinal beams B in a hoisting mode.

4. A numerically controlled double-ended milling machine according to claim 1 or 3, wherein the profile centering fixture comprises a centering cylinder and a centering guide rail longitudinally arranged on the longitudinal beam a, a centering slide seat is arranged on the centering guide rail, a positioning column and a clamping cylinder are longitudinally arranged on the centering slide seat at intervals, the clamping cylinder is connected with a clamping plate, a pressing seat is arranged in the middle of the longitudinal beam a, a pressing cylinder is vertically arranged on the pressing seat, a guide sliding rail is vertically arranged on the pressing seat, a pressing plate is arranged on the guide sliding rail, and the pressing plate is connected with the pressing cylinder.

5. The numerical control double-end face milling machine according to claim 4, wherein the double-end milling mechanism comprises a guide rail A arranged on a longitudinal beam B, a main sliding plate is arranged on the guide rail A, a main beam frame is arranged at the lower end of the main sliding plate, the main beam frame is arranged between the two longitudinal beams B, the main sliding plate and the main beam frame form the main sliding seat, a rack A is arranged on one longitudinal beam B, a speed reducer A is arranged on the main sliding plate, a servo motor A is arranged at the input end of the speed reducer A, and a gear A meshed with the rack A is arranged at the output end of the speed reducer A.

6. The numerical control double-end face milling machine according to claim 5, wherein the front end milling mechanism comprises a front guide rail B vertically arranged at the front end of a main beam frame, a front sliding seat B is arranged on the front guide rail B, a front screw seat B and a front screw B are arranged on the front sliding seat B, a front servo motor B is arranged at the upper end of the main beam frame, the front servo motor B is connected with a front screw B, the front screw B is connected with the front screw B, a front sliding block C is transversely arranged on the front sliding seat B, a front guide rail C is arranged on the front sliding block C, a front sliding seat C is arranged on the front sliding seat C, a front servo motor C is connected with a front screw C, a front screw seat C and a front screw C are arranged on the front sliding seat B, a double-end spindle motor A is vertically arranged at the front end of the front sliding seat C, and two ends of the double-end spindle motor A are respectively provided with a milling cutter A.

7. The numerical control double-end face milling machine according to claim 6, wherein the rear end milling mechanism comprises a rear guide rail B vertically arranged at the rear end of the main beam frame, a rear sliding seat B is arranged on the rear guide rail B, a rear screw seat B and a rear screw nut B are arranged on the rear sliding seat B, a rear servo motor B is arranged at the upper end of the main beam frame, the rear servo motor B is connected with the rear screw rod B, the rear screw rod B is connected with the rear screw nut B, a rear sliding block C is transversely arranged on the rear sliding seat B, a rear guide rail C is arranged on the rear sliding block C, a rear servo motor C is arranged on the rear sliding seat C, a rear screw rod C is connected with the rear screw rod C, a rear screw seat C and a rear screw nut C are arranged on the rear sliding seat B, a bearing seat is arranged on the front end of the rear sliding seat C in a longitudinal direction, a rotating shaft is arranged on the bearing seat through a bearing, a rotating seat is arranged at the inner end of the rotating shaft, a spindle motor B is arranged on the rotating seat, a rear sliding seat C is arranged on the rear sliding seat C, and a rear sliding seat C is arranged on a rear sliding seat C, and a rear servo seat C is arranged on a rear sliding seat B, and a rear servo seat B.

8. The numerically controlled double-ended milling machine according to claim 7, wherein the end positioning mechanism comprises a mounting plate transversely arranged on the main beam frame, an end positioning cylinder is arranged on the mounting plate, the end positioning cylinder is connected with an end positioning plate, a flange linear bearing is arranged on the mounting plate, a guide shaft is arranged on the end positioning plate, and the guide shaft is arranged on the flange linear bearing.