CN221110888U - Vertical milling center - Google Patents

Abstract

The utility model discloses a vertical milling center, which comprises: the length direction is the lathe bed and the portal frame in the X-axis direction, a numerical control turntable is arranged on the lathe bed, and the portal frame and the numerical control turntable move relatively along the X-axis direction; the portal frame comprises two upright posts positioned on two sides of the lathe bed and a cross beam fixedly arranged at the upper ends of the two upright posts; the length direction of the cross beam is the Y-axis direction, and a saddle sliding along the Y-axis direction is arranged on the cross beam; the saddle is provided with a ram which slides along the direction vertical to the X axis and the direction vertical to the Y axis, and the sliding direction of the ram is the Z axis direction; the ram is fixedly provided with a vertical main shaft box which is provided with a swinging head; one side of the lathe bed is provided with a tool changing mechanism, the tool changing mechanism comprises a push-out tool magazine which is vertically arranged and a tool changing manipulator which is arranged on one side of the tool changing position of the push-out tool magazine, and the tool changing manipulator can grab tools in the push-out tool magazine to move along the X axis and the Z axis to search for a swinging head for tool changing. The utility model can shorten the tool changing time of the machining center and improve the machining efficiency of the machining center.

Description

Vertical milling center

Technical Field

The utility model relates to the technical field of machine tools, in particular to a vertical milling center.

Background

In modern petroleum exploration, military industry, aerospace, ship manufacturing, offshore platform and other projects, a plurality of large deep hole milling parts are arranged, machining is often required to be completed in one clamping in order to ensure the machining precision of the parts, and a gantry machining center is important equipment for realizing one clamping machining of pentahedrons.

Because the gantry machining center is suitable for machining large parts, the size of the gantry machining center is generally large, and the distance between each shaft of the gantry machining center is long; in order to ensure the rigidity of the gantry machining center, the moving parts of the shafts of the gantry machining center are large in volume and weight. The inertia of the gantry machining center beam is large, the movement is slow, the movement takes long time, a great amount of time is required for a traditional tool changing mode that the spindle moves to a tool changing position near the tool magazine position to change the tool, and the traditional tool changing mode influences the machining efficiency of the gantry machining center because the tool changing needs to be carried out for multiple times during machining of the gantry machining center.

Disclosure of utility model

The utility model provides a vertical milling machining center, which aims to solve the technical problem that the machining efficiency of a gantry machining center is affected due to long tool changing time of the existing gantry machining center.

In order to achieve the above object, the technical scheme of the present utility model is as follows:

A vertical milling center comprising: the length direction is the lathe bed and the portal frame in the X-axis direction, a numerical control turntable is arranged on the lathe bed, and the portal frame and the numerical control turntable move relatively along the X-axis direction; the portal frame comprises two upright posts positioned on two sides of the lathe bed and a cross beam fixedly arranged at the upper ends of the two upright posts; the length direction of the cross beam is the Y-axis direction, and a saddle sliding along the Y-axis direction is arranged on the cross beam; the saddle is provided with a ram which slides along the direction vertical to the X axis and the direction vertical to the Y axis, and the sliding direction of the ram is the Z axis direction; the ram is fixedly provided with a vertical main shaft box which is provided with a swinging head; one side of the lathe bed is provided with a tool changing mechanism, the tool changing mechanism comprises a push-out tool magazine which is vertically arranged and a tool changing manipulator which is arranged on one side of the tool changing position of the push-out tool magazine, and the tool changing manipulator can grab tools in the push-out tool magazine to move along the X axis and the Z axis to search for a swinging head for tool changing.

Further, the tool changing manipulator comprises an X-axis truss parallel to the X-axis direction, a Z-axis truss parallel to the Z-axis direction and an ATC automatic tool changing device arranged on the Z-axis truss; the Z-axis truss moves along the X-axis truss, the ATC automatic tool changing device moves along the Z-axis truss, and the tool drawing direction of the ATC automatic tool changing device is parallel to the Y-axis direction; the automatic ATC tool changing device is fixedly provided with a transfer tool sleeve component, the transfer tool sleeve component is located on one side, far away from the push-out tool magazine, of the automatic ATC tool changing device, a manipulator on the automatic ATC tool changing device corresponds to the transfer tool sleeve component, and the transfer tool sleeve component can temporarily store tools grabbed by the manipulator.

Further, the transfer tool sleeve assembly comprises a connecting seat, a fixing piece and a tool sleeve; the connecting seat is fixedly arranged on the ATC automatic cutter changing device, the fixing piece is fixedly arranged on the connecting seat, the cutter sleeve is fixedly arranged at one end, far away from the connecting seat, of the fixing piece along the direction parallel to the Y axis, and the opening direction of the cutter sleeve is consistent with the cutter pulling direction of the ATC automatic cutter changing device.

Furthermore, two mounting through grooves are formed in the outer peripheral surface of the cutter sleeve, and the two mounting through grooves are positioned on two sides of the axis of the cutter sleeve; the cutter sleeve is clamped into the clamping groove, the bottom surfaces of the two mounting through grooves are abutted with the inner wall of the clamping groove, and the side walls of the two mounting through grooves are respectively abutted with the two end surfaces of the fixing piece along the direction parallel to the Y axis; one end of the fixing piece, which is far away from the connecting seat, is fixedly provided with a pressing plate, the pressing plate and the clamping groove enclose the cutter sleeve, and the pressing plate is abutted against the outer peripheral surface of the cutter sleeve.

Further, the transmission structure of the X-axis truss and the Z-axis truss is a screw nut, a ball screw or a gear rack structure.

Further, the X-axis truss is provided with a steel plate protective cover.

Furthermore, the bottoms of the lathe bed, the X-axis truss and the upright post are provided with adjusting sizing blocks.

Further, a sliding seat is arranged between the ATC automatic tool changing device and the Z-axis truss, the ATC automatic tool changing device is fixedly arranged on the sliding seat, and the sliding seat moves along the Z-axis truss.

Further, chip discharging grooves along the X-axis direction are formed in the two sides of the numerical control turntable on the lathe bed, a spiral chip discharging device is arranged in the chip discharging grooves, and a chip discharging driving device is arranged on the lathe bed and drives the spiral chip discharging device to push chips entering the chip discharging grooves out of the end portion of the lathe bed.

Furthermore, the interiors of the upright posts and the cross beams are hollow and reinforced by rib plates.

The beneficial effects are that:

The numerical control turntable and the swinging head are arranged to realize five-surface milling of the gantry machining center; the sliding saddle and the sliding pillow are also arranged to cancel the movement of the cross beam, so that the swinging head can move more rapidly; the tool changing mechanism is further arranged, so that the swinging head only needs to move to a tool changing position of the machining center along the Y, Z axis direction, the tool is grabbed by the tool changing mechanism, moves along the X axis and the Z axis direction, the swinging head is searched for tool changing, and the tool changing mechanism and the swinging head move simultaneously; the direction and distance of swinging head movement are reduced, the waiting time of tool changing is shortened, the tool changing time of a machining center can be shortened, and the machining efficiency of the machining center is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic view of a vertical milling center according to the present disclosure;

FIG. 2 is a front view of a vertical milling center of the present disclosure;

FIG. 3 is a right side view of a vertical milling center of the present disclosure;

FIG. 4 is a top view of a vertical milling center of the present disclosure;

FIG. 5 is a schematic view of a tool changing mechanism of a vertical milling center according to the present utility model;

FIG. 6 is a front view of a tool changing mechanism of a vertical milling center of the present disclosure;

FIG. 7 is a top view of a tool changing mechanism of a vertical milling center of the present disclosure;

FIG. 8 is a schematic diagram illustrating an automatic ATC tool changing device and a transfer tool sleeve assembly of a vertical milling center;

FIG. 9 is a front view of an ATC automatic tool changing device and a transfer sleeve assembly of a vertical milling center disclosed by the utility model;

FIG. 10 is a top view of an ATC automatic tool changer and transfer sleeve assembly of a vertical milling center of the present disclosure;

FIG. 11 is a schematic view of a cutter sleeve of a vertical milling center according to the present disclosure;

FIG. 12 is a schematic view of a vertical milling center fixture according to the present disclosure;

FIG. 13 is a schematic structural view of a numerical control turntable of a vertical milling center disclosed by the utility model;

FIG. 14 is a front view of a numerical control turret of a vertical milling center of the present disclosure;

FIG. 15 is a cross-sectional view of A-A in FIG. 14;

FIG. 16 is a cross-sectional view of B-B in FIG. 14;

FIG. 17 is a top view of a numerical control turntable of a vertical milling center disclosed by the utility model;

FIG. 18 is a cross-sectional view of C-C in FIG. 17;

FIG. 19 is a cross-sectional view of D-D in FIG. 17;

FIG. 20 is an enlarged view of a portion of I of FIG. 19;

FIG. 21 is a schematic diagram showing a tool changing operation of a vertical milling center according to the present utility model;

FIG. 22 is a schematic diagram II of a tool changing process of a vertical milling center according to the present utility model;

FIG. 23 is a schematic diagram III of a tool changing operation process of a vertical milling center according to the present utility model;

FIG. 24 is a schematic diagram of a tool changing operation of a vertical milling center according to the present disclosure;

FIG. 25 is a schematic diagram of a tool changing operation of a vertical milling center according to the present disclosure;

FIG. 26 is a schematic diagram of a tool changing process of a vertical milling center according to the present disclosure;

Fig. 27 is a schematic diagram seven of a tool changing process of the vertical milling center according to the present utility model.

1. A bed body; 2. a portal frame; 21. a column; 22. a cross beam;

3. A numerical control rotary table; 31. a base; 32. a rotating body; 33. a turntable; 34. positioning cone; 35. a positioning sleeve; 351. an adjustment pad; 352. detecting the cavity; 37. a mandrel; 38. an angle encoder; 310. a connecting ring; 320. a worm wheel; 330. a bearing; 340. a worm; 350. a gear transmission; 360. a servo motor;

4. a saddle; 5. a ram; 6. a vertical headstock;

7. A tool changing mechanism; 71. pushing out a tool magazine; 72. a tool changing manipulator; 721. an X-axis truss; 722. a Z-axis truss; 723. an ATC automatic tool changing device; 724. a sliding seat; 73. a middle rotary cutter sleeve assembly; 731. a connecting seat; 732. a fixing member; 733. a knife sleeve; 734. a pressing plate; 735. installing a through groove; 736. the clamping groove is communicated;

8. Swinging the head; 9. a drag chain box; 91. a Y-axis drag chain; 92. a Z-axis drag chain; 10. a spiral chip remover; 20. chip removal driving device.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

A vertical milling center, as shown in connection with fig. 1, 2, 3 and 4, comprising: the machine tool comprises a machine tool body 1 and a gantry 2, wherein the length direction of the machine tool body is the X-axis direction, a numerical control turntable 3 is arranged on the machine tool body 1, and the gantry 2 and the numerical control turntable 3 move relatively along the X-axis direction; the portal frame 2 comprises two upright posts 21 positioned on two sides of the lathe bed 1 and a cross beam 22 fixedly arranged at the upper ends of the two upright posts 21; the length direction of the cross beam 22 is the Y-axis direction, and a saddle 4 sliding along the Y-axis direction is arranged on the cross beam 22; the saddle 4 is provided with a ram 5 sliding along the direction vertical to the X axis and the direction vertical to the Y axis, and the sliding direction of the ram 5 is the Z axis direction; the ram 5 is fixedly provided with a vertical spindle box 6, and the vertical spindle box 6 is provided with a swinging head 8; one side of the machine body 1 is provided with a tool changing mechanism 7, the tool changing mechanism 7 comprises a push-out tool magazine 71 and a tool changing manipulator 72, the push-out tool magazine 71 is arranged vertically, the tool changing manipulator 72 is arranged on one side of the tool changing position of the push-out tool magazine 71, and tools in the push-out tool magazine 71 can be grabbed to move along the X axis and the Z axis to search for a swinging head 8 for tool changing.

After the machining is finished, the ram 5 drives the vertical spindle box 6 to move along the Z-axis direction, the saddle 4 drives the vertical spindle box 6 to move along the Y-axis direction, so that the swinging head 8 moves to a machining center tool changing position, and the swinging head 8 swings to a position with the axis parallel to the Y-axis direction. The tool changing manipulator 72 in the tool changing mechanism 7 grabs tools from the tool changing position of the push-out tool magazine 71, firstly moves the corresponding swinging head 8 along the X-axis direction, then moves the corresponding swinging head 8 along the Z-axis direction, exchanges the tools grabbed by the tool changing manipulator 72 with the tools on the swinging head 8, and returns the tool changing manipulator 72 to carry out tool setting and tool taking again after tool changing is completed. Meanwhile, the arrangement of the saddle 4 and the ram 5 avoids the movement of the cross beam 22, so that the movement speed of the vertical spindle box 6 is increased, and the tool changing efficiency is improved; and the problem of repeated positioning error accumulation caused by movement of two shafts in the movable structure of the cross beam 22 is avoided, and the machining positioning precision of the machining center is improved.

In this embodiment, the machine body 1 is fixed with two columns 21 on both sides, and a driving device is disposed on the machine body 1 to drive the numerical control turntable 3 to move along the X-axis direction. The driving device includes: the numerical control turntable 3 is arranged on the X-axis precise sliding guide rails, and the X-axis ball screw driving structure is positioned between the two X-axis precise sliding guide rails. The X-axis ball screw driving structure comprises an X-axis servo motor, an X-axis ball screw and an X-axis screw nut; the X-axis servo motor drives the X-axis ball screw to drive the numerical control turntable 3 to move along the X-axis direction through the X-axis screw nut. The X-axis precise sliding guide rail and the X-axis ball screw driving structure are provided with a steel plate protective cover for preventing oil stains and metal scraps from entering so as to protect the transmission structure.

The side of the cross beam 22 is provided with a driving device with the same structure to drive the saddle 4 to move along the Y-axis direction, and the saddle is provided with an organ cover for protection. The side of the saddle 4 away from the cross beam 22 is also provided with a driving device with the same structure to drive the ram 5 to move along the Z-axis direction.

The side of the saddle 4 facing the cross beam 22 is fixed with a drag chain box 9 by screws. A Y-axis drag chain 91 is arranged above the cross beam 22, the fixed end of the Y-axis drag chain is fixed at the top of the cross beam 22, and the follower end is fixed on the drag chain box 9; the ram 5 is provided with a Z-axis drag chain 92, the fixed end of the Z-axis drag chain 92 is fixed on the top of the drag chain box 9, and the follow-up end is fixed on the ram 5. The flexible pipe fittings such as cables, oil pipes, air pipes and the like for controlling the vertical spindle box 6 are respectively led in from the fixed ports of the Y-axis drag chain 91, are led in from the fixed ports of the Z-axis drag chain 92 through the drag chain box 9 after being led out from the follow-up ports of the Z-axis drag chain 92, and are connected to the vertical spindle box 6 after being led out from the follow-up ports of the Z-axis drag chain 92. When the Y-axis drag chain 91 is in operation, the Y-axis drag chain 91 is bent and moved along the Y-axis direction, the Z-axis drag chain 92 is bent and moved along the Z-axis direction, and the flexible pipeline is bent and moved along with the drag chain without confusion, involvement and bending.

As shown in fig. 1, 5, 6 and 7, the push-out tool magazine 71 and the swing head 8 are provided on the same side of the column 21, the tool changing position of the push-out tool magazine 71 is oriented to the column 21, and the tool changing manipulator 72 is located between the push-out tool magazine 71 and the column 21. The tool changing manipulator 72 includes an X-axis truss 721 parallel to the X-axis direction, a Z-axis truss 722 parallel to the Z-axis direction, and an ATC automatic tool changing device 723 provided on the Z-axis truss 722; the Z-axis truss 722 moves along the X-axis truss 721, the ATC automatic tool changer 723 moves along the Z-axis truss 722, and the tool drawing direction of the ATC automatic tool changer 723 is parallel to the Y-axis direction and faces the outside of the bed 1; the automatic ATC tool changing device 723 is fixedly provided with a middle rotating tool sleeve assembly 73, the middle rotating tool sleeve assembly 73 is positioned on one side, far away from the push-out tool magazine 71, of the automatic ATC tool changing device 723, a manipulator on the automatic ATC tool changing device 723 corresponds to the middle rotating tool sleeve assembly 73, and the middle rotating tool sleeve assembly 73 can temporarily store tools grabbed by the manipulator.

The ATC automatic tool changing device 723 grabs the tools at the tool changing position of the tool magazine and then puts the tools into the middle rotating tool sleeve assembly 73, so that temporary storage of the tools is realized. The X-axis truss 721 and the Z-axis truss 722 are moved to move the ATC automatic tool changer 723 and the transfer sleeve assembly 73 to a tool changing position of the machining center for tool changing operation. The ATC automatic tool changer 723 simultaneously replaces the tool of the tool changing position of the machining center and the tool on the transfer tool sleeve assembly 73, thereby avoiding tool dropping when the ATC automatic tool changer 723 grabs one tool and then grabs another tool again. The automatic ATC tool changing device 723 can be used for grabbing a tool first and then moving between a tool changing position of a machining center to a tool changing position of a tool magazine to finish tool changing. And the X-axis truss 721 is matched with the Z-axis truss 722, so that the machining center only needs to move along Y, Z directions, the movement of the machining center along the X direction is reduced, and the tool changing of the tool magazine and the tool changing of the swinging head 8 to the machining center can be performed simultaneously, so that the waiting time is reduced, and the tool changing efficiency can be improved.

As shown in fig. 5, 7, 8 and 9, a sliding seat 724 is provided between the ATC automatic tool changer 723 and the Z-axis truss 722, and the ATC automatic tool changer 723 is fixedly connected to the sliding seat 724 by screws, and the sliding seat 724 moves along the Z-axis truss 722.

As shown in fig. 8, 10, 11 and 12, the transferring blade sleeve assembly 73 includes a connecting seat 731, a fixing member 732 and a blade sleeve 733; the connecting seat 731 is an L-shaped structure consisting of a bottom plate and side plates, and the bottom plate of the connecting seat 731 is fixedly connected to one side, far away from the ATC automatic tool changing device 723, of the sliding seat 724 through screws, so that the connecting seat 731 is fixedly connected with the ATC automatic tool changing device 723. The side plate of the connecting seat 731 faces the robot arm of the ATC automatic cutter changing device 723, and the side plate of the connecting seat 731 is located outside the sliding seat 724; the fixing member 732 is fixedly coupled to the side plate of the coupling seat 731 by a screw. Two mounting through grooves 735 are formed in the outer peripheral surface of the cutter sleeve 733, the two mounting through grooves 735 are located on two sides of the axis of the cutter sleeve 733, and the bottom surfaces of the two mounting through grooves 735 are opposite. One end of the fixing piece 732, which is far away from the connecting seat 731, is provided with a clamping groove 736 along the direction of the parallel X axis, the cutter sleeve 733 is clamped into the clamping groove 736, and the opening of the cutter sleeve 733 faces to the manipulator of the ATC automatic cutter changing device 723, so that the opening of the cutter sleeve 733 faces to the cutter pulling direction of the ATC automatic cutter changing device 723; the bottom surfaces of the two mounting through grooves 735 are abutted against the inner wall of the clamping through groove 736, and the side walls of the two mounting through grooves 735 are respectively abutted against the two end surfaces of the fixing piece 732 along the direction parallel to the Y axis; the knife pouch 733 is prevented from moving in a direction parallel to the Y axis. One end of the fixing member 732, which is far away from the connecting seat 731, is fixedly connected with a pressing plate 734 through a screw, the pressing plate 734 and the clamping groove 736 enclose the cutter sleeve 733, and the pressing plate 734 abuts against the outer circumferential surface of the cutter sleeve 733 to press the cutter sleeve 733. The cutter sleeve 733 is fixed to an end of the fixing member 732, which is far from the connecting seat 731, along the direction parallel to the Y axis.

As shown in fig. 1, 5 and 6, the transmission structure of the X-axis truss 721 and the Z-axis truss 722 is a screw nut, a ball screw, or a rack and pinion structure. In the drawings of the present embodiment, the transmission structure is described using a screw nut structure. A steel plate shield is provided on the X-axis truss 721. The transmission structure of the X-axis truss 721 is prevented from entering greasy dirt and metal scraps, and the X-axis truss 721 is protected. The bottoms of the bed body 1, the X-axis truss 721 and the upright post 21 are provided with adjusting sizing blocks for adjusting the horizontal plane during installation, so as to ensure the installation accuracy.

Referring to fig. 1, 2 and 4, chip grooves along the X-axis direction are formed in two sides of the numerical control turntable 3 on the lathe bed 1, a spiral chip cleaner 10 is arranged in each chip groove, a chip cleaner driving device 20 is arranged at the front end of each chip groove on the lathe bed 1, each driving device 20 comprises a chain transmission component and a motor, a driven sprocket is connected after a shaft of each spiral chip cleaner 10 penetrates out, a driving sprocket is connected with a shaft of each motor, the motors drive the spiral chip cleaners 10 to rotate through chain transmission, and the spiral structures of the spiral chip cleaners 10 push chips to move after rotating, so that the chips entering the chip cleaners are pushed out of the end part of the lathe bed 1. The rear end of the chip groove is provided with a filter for recycling the discharged chips.

The upright posts 21 and the cross beams 22 are made of high-strength gray cast iron, are hollow in the interior and are reinforced by staggered cross-shaped ribs. The bottom of the lathe bed 1 is provided with transverse rib plates which are spaced in parallel along the X-axis direction and longitudinal rib plates which are connected with the transverse rib plates along the X-axis direction, and the section of each longitudinal rib plate is M-shaped. The column 21, the cross beam 22 and the lathe bed 1 are designed in a lightweight manner, so that the rigidity of the machining center is ensured, and the weight of the machining center is reduced.

As shown in fig. 13 and 14, the numerical control turntable 3 includes: a base 31, a rotating body 32, and a turntable 33; four positioning cones 34 are uniformly distributed on the circumference of the upper surface of the rotating body 32, four positioning sleeves 35 are fixedly arranged at the bottom of the rotating table 33, and the positioning sleeves 35 are in matched connection with the positioning cones 34; as shown in fig. 15 and 16, 17 and 18, the center of the rotating body 32 is provided with a clamping device for clamping and unclamping the turntable 33; a mandrel 37 is coaxially and fixedly arranged on the rotating body 32, the mandrel 37 is positioned on one side, far away from the turntable 33, of the clamping device, the base 31 comprises a base cavity, and the end, far away from the clamping device, of the mandrel 37 extends into the base cavity and is coaxially connected with an angle encoder 38; a tightening device is arranged in the base cavity and is positioned at the outer side of the mandrel 37, and the tightening device is connected with a connecting ring 310 coaxial with the mandrel 37; the top of the connecting ring 310 is fixedly connected with the rotating body 32, the bottom is fixedly provided with the worm wheel 320, and a bearing 330 is arranged between the connecting ring 310 and the base 31 to rotate around the axis of the mandrel 37; a worm 340 is provided in the housing and is engaged with the worm wheel 320, one end of the worm 340 being connected to a servo motor 360 provided outside the housing 31 via a gear assembly 350.

Four pairs of positioning cones 34 and positioning sleeves 35 are uniformly distributed on the circumference of the rotating body 32, the clamping device is positioned at the center of the rotating body 32, so that the distances between the clamping device and the four pairs of positioning cones 34 and the four pairs of positioning sleeves 35 are equal, and when the clamping device clamps, the four pairs of positioning cones 34 and the four pairs of positioning sleeves 35 are uniformly stressed, so that the rotating table 33 is prevented from deflecting, the accurate positioning of the rotating table 33 through the four pairs of positioning cones 34 and the four pairs of positioning sleeves 35 is realized, the end runout of the rotating table 33 is reduced, and the machining precision of the machining center is improved. And the angle encoder 38 and the mandrel 37 are directly connected, so that accumulated errors can be reduced, and the accuracy of angle detection of the angle encoder 38 is improved, thereby improving the accuracy of the rotation angle of the numerical control turntable 3 and improving the machining accuracy of a machining center.

As shown in fig. 14, 19 and 20, the positioning sleeve 35 is matched with an adjusting pad 351, the adjusting pad 351 is located between the positioning sleeve 35 and the turntable 33 and is used for adjusting the heights of the four positioning sleeves 35, so that the adjustment of the turntable 33 is realized, and the end runout of the turntable 33 is ensured to meet the precision requirement.

The locating sleeve 35 and the locating cone 34 are matched to form a detection cavity 352, a detection air passage communicated with the detection cavity 352 is arranged in the locating cone 34 and is used for detecting the tightness of the detection cavity 352, so that whether the corresponding locating sleeve 35 and the locating cone 34 are reliably contacted or not is judged, and the locating accuracy is guaranteed.

The worm 340 is a dual-lead worm, and the dual-lead worm is axially adjusted, so that a reverse gap can be reduced, thereby improving the precision of the rotation angle of the numerical control turntable 3 and realizing the improvement of the machining precision of the machining center.

The working principle of the device is as follows:

As shown in fig. 21, 22, 23 and 24, the X-axis truss 721 and the Z-axis truss 722 are moved to enable the ATC automatic tool changer 723 to move to a tool changing position of the tool magazine, the tool to be changed at the tool changing position of the tool magazine is clamped by rotating the manipulator of the ATC automatic tool changer 723 by 90 °, tool drawing is achieved by sliding the manipulator of the ATC automatic tool changer 723, the tool is aligned with the tool sleeve 733 on the middle rotating tool sleeve assembly 73 after rotating the manipulator of the ATC automatic tool changer 723 by 180 °, tool inserting is achieved by sliding the manipulator of the ATC automatic tool changer 723, and the manipulator of the ATC automatic tool changer 723 is reversed by 90 °.

As shown in fig. 1, 2 and 24, the saddle 4 moves along the Y-axis and the ram 5 moves along the Z-axis, so that the swing head 8 is displaced to the outside of the bed 1 in the Y-axis direction after the swing head 8 moves to the tool changing position of the machining center.

As shown in fig. 25, 26 and 27, the X-axis truss 721 and the Z-axis truss 722 are moved to move the robot of the ATC automatic tool changer 723 to the tool changing position of the machining center, the robot of the ATC automatic tool changer 723 rotates 90 ° while clamping the tool to be changed at the tool changing position of the machining center and the tool to be changed at the tool sleeve 733, the robot of the ATC automatic tool changer 723 slides to realize tool drawing, the robot of the ATC automatic tool changer 723 rotates 180 ° to realize tool changing, the robot of the ATC automatic tool changer 723 slides to realize tool inserting, and the robot of the ATC automatic tool changer 723 reverses 90 °. The insertion of the tool to be replaced into the swing head 8 is completed.

As shown in fig. 1, 2 and 27, the X-axis truss 721 and the Z-axis truss 722 are moved to move the ATC automatic tool changer 723 to the tool changing position of the tool magazine, thereby changing the tools in the tool sleeve 733 and the tool changing position tools of the tool magazine. The saddle 4 drives the swing head 8 to move to a processing area along the Y axis for processing.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. A vertical milling center, comprising: the machine tool comprises a machine tool body (1) and a gantry (2) which are arranged in the length direction of an X-axis direction, wherein a numerical control turntable (3) is arranged on the machine tool body (1), and the gantry (2) and the numerical control turntable (3) move relatively along the X-axis direction; the portal frame (2) comprises two upright posts (21) positioned on two sides of the lathe bed (1) and a cross beam (22) fixedly arranged at the upper ends of the two upright posts (21); the length direction of the cross beam (22) is the Y-axis direction, and a saddle (4) sliding along the Y-axis direction is arranged on the cross beam (22); the sliding saddle (4) is provided with a sliding pillow (5) which slides along the direction vertical to the X axis and the direction vertical to the Y axis, and the sliding direction of the sliding pillow (5) is the Z axis direction; a vertical spindle box (6) is fixedly arranged on the ram (5), and a swinging head (8) is arranged on the vertical spindle box (6); one side of the lathe bed (1) is provided with a tool changing mechanism (7), the tool changing mechanism (7) comprises a push-out tool magazine (71) and a tool changing manipulator (72) arranged on one side of the tool changing position of the push-out tool magazine (71), and the tool changing manipulator (72) can grab tools in the push-out tool magazine (71) to move along the X axis and the Z axis to search for the swinging head (8) to change tools.

2. The vertical milling center according to claim 1, wherein the tool changing robot (72) includes an X-axis truss (721) parallel to the X-axis direction, a Z-axis truss (722) parallel to the Z-axis direction, and an ATC automatic tool changing device (723) provided on the Z-axis truss (722); the Z-axis truss (722) moves along the X-axis truss (721), the ATC automatic tool changing device (723) moves along the Z-axis truss (722) and the tool drawing direction of the ATC automatic tool changing device (723) is parallel to the Y-axis direction; the automatic ATC tool changing device (723) is fixedly provided with a transfer tool sleeve component (73), the transfer tool sleeve component (73) is located on one side, far away from the push-out tool magazine (71), of the automatic ATC tool changing device (723), a manipulator on the automatic ATC tool changing device (723) corresponds to the transfer tool sleeve component (73), and the transfer tool sleeve component (73) can temporarily store tools grabbed by the manipulator.

3. The vertical milling machining center according to claim 2, wherein the transfer sleeve assembly (73) comprises: a connecting seat (731), a fixing piece (732) and a cutter sleeve (733); the automatic ATC tool changing device is characterized in that the connecting seat (731) is fixedly arranged on the automatic ATC tool changing device (723), the fixing piece (732) is fixedly arranged on the connecting seat (731), the tool sleeve (733) is fixedly arranged at one end, far away from the connecting seat (731), of the fixing piece (732) along the direction of a parallel Y axis, and the opening direction of the tool sleeve (733) is consistent with the tool drawing direction of the automatic ATC tool changing device (723).

4. A vertical milling center according to claim 3, characterized in that the outer circumferential surface of the tool sleeve (733) is provided with two mounting through grooves (735), the two mounting through grooves (735) being located on both sides of the axis of the tool sleeve (733); a clamping groove (736) is formed in one end, far away from the connecting seat (731), of the fixing piece (732) along the direction of the parallel X axis, the cutter sleeve (733) is clamped into the clamping groove (736), the bottom surfaces of the two mounting through grooves (735) are abutted with the inner wall of the clamping groove (736), and the side walls of the two mounting through grooves (735) are respectively abutted with the two end surfaces of the fixing piece (732) along the direction of the parallel Y axis; one end of the fixing piece (732) far away from the connecting seat (731) is fixedly provided with a pressing plate (734), the pressing plate (734) and the clamping groove (736) enclose the cutter sleeve (733), and the pressing plate (734) is abutted against the outer circumferential surface of the cutter sleeve (733).

5. A vertical milling centre according to claim 2, wherein the transmission structure of the X-axis truss (721) and the Z-axis truss (722) is a screw nut, a ball screw or a rack and pinion structure.

6. A vertical milling centre according to claim 2, wherein the X-axis truss (721) is provided with a steel plate shield.

7. A vertical milling centre according to claim 2, characterized in that the bed (1), the X-axis truss (721) and the bottom of the column (21) are provided with adjusting shims.

8. The vertical milling center according to claim 2, wherein a sliding seat (724) is provided between the ATC automatic tool changer (723) and the Z-axis truss (722), the ATC automatic tool changer (723) is fixedly arranged on the sliding seat (724), and the sliding seat (724) moves along the Z-axis truss (722).

9. The vertical milling center according to claim 1, wherein chip removal grooves along the X-axis direction are formed in the lathe bed (1) and located on two sides of the numerical control turntable (3), a spiral chip remover (10) is arranged in each chip removal groove, and a chip removal driving device (20) is arranged on the lathe bed (1) to drive the spiral chip remover (10) to push chips entering the chip removal grooves out of the end portion of the lathe bed (1).

10. A vertical milling centre according to claim 1, characterized in that the interior of the uprights (21) and the cross-beams (22) is hollow and reinforced with a web.