CN216632744U - Milling head connecting structure for numerical control gantry machining center - Google Patents

Abstract

The application relates to the technical field of milling machines, in particular to a milling head connecting structure for a numerical control gantry machining center, which comprises an assembling seat and a connecting seat, wherein the assembling seat is arranged on a main shaft, the connecting seat is arranged on a milling head, and a butt joint locking component for locking the connecting seat is arranged in the assembling seat; and a positioning assembly is arranged between the assembling seat and the connecting seat in a matching manner, when the butt joint locking assembly is locked with the connecting seat, the positioning assembly guides the assembling seat and the connecting seat to be in positioning connection, and the main shaft is in transmission connection with the milling head. This application has the assembly structure who simplifies main shaft and cutter head, the convenient effect of dismantling, changing the cutter head.

Description

Milling head connecting structure for numerical control gantry machining center

Technical Field

The application relates to the technical field of milling machines, in particular to a milling head connecting structure for a numerical control gantry machining center.

Background

The milling machine and other large-scale machining centers can not separate the machining main shaft and various milling heads, and the milling heads can clamp various milling cutters required for machining and are connected with the milling heads through the main shaft transmission and drive the milling cutters to complete the machining process.

Taking a machining center of a planer type milling machine as an example, the planer type milling machine mostly adopts a vertical machine tool to perform vertical milling, a spindle and a milling head generally need to be pre-precisely assembled, a milling cutter is driven through a built-in transmission structure, and the machining orientation of the milling head and the milling cutter is rotationally adjusted through the driving structure.

However, the pre-precision assembled spindle and milling head are inconvenient to disassemble and replace other types of milling heads, and the machining process is difficult to switch.

SUMMERY OF THE UTILITY MODEL

In order to simplify the assembly structure of main shaft and cutter head, convenient dismantlement, change the cutter head, this application provides a numerical control longmen is cutter head connection structure for machining center.

The application provides a numerical control longmen is cutter head connection structure for machining center adopts following technical scheme:

a milling head connecting structure for a numerical control gantry machining center comprises an assembling seat and a connecting seat, wherein the assembling seat is used for being arranged on a main shaft, the connecting seat is used for being arranged on a milling head, and a butt joint locking component used for locking the connecting seat is arranged in the assembling seat;

and a positioning assembly is arranged between the assembling seat and the connecting seat in a matching manner, when the butt joint locking assembly is locked with the connecting seat, the positioning assembly guides the assembling seat and the connecting seat to be in positioning connection, and the main shaft is in transmission connection with the milling head.

By adopting the technical scheme, an operator can quickly realize the separation or locking connection of the assembling seat and the connecting seat through the driving butt joint locking component, the positioning component guides the assembling seat to be quickly positioned and connected with the connecting seat, the main shaft is assisted to be quickly transmitted and connected with the milling head, the assembly structure of the main shaft and the milling head is favorably simplified, the operation personnel can conveniently disassemble and replace different milling heads by rotating the milling head through the external assistance of the external part.

In a specific possible embodiment, the butt-joint locking assembly comprises a piston which is arranged in the assembly seat in a sliding manner along the axial direction of the main shaft, two oil inlet cavities are formed between the piston and the assembly seat, and the oil inlet cavities are used for externally connecting an oil pump and driving the piston to move in an axial and telescopic manner along the main shaft;

the piston is provided with a locking piece used for extending out of the assembling seat, and the connecting seat is provided with a locking piece for hooking the locking piece;

after the locking piece is hooked with the locking piece, in the process of piston contraction, the locking piece is positioned and pressed on the assembling seat.

Through adopting above-mentioned technical scheme, operating personnel realizes the nimble concertina movement of piston through the reciprocal oil feed of external oil pump in two oil feed intracavity of drive, and after the locking piece hook was linked up the locking piece, the external oil pump oil of drive and the oil feed chamber oil pressure that keeps the oil feed are favorable to keeping the stable pressfitting of locking piece on the assembly seat, improve the stability of milling head connection main shaft.

In a specific possible embodiment, the locking piece is configured as a locking ring, and a plurality of locking blocks are circumferentially arranged on an outer annular wall of the locking ring, the locking piece is configured as a locking ring, and a plurality of locking blocks are circumferentially arranged on an inner annular wall of the locking ring;

the diameter of an inner circle formed by the plurality of locking blocks in the circumferential direction is smaller than that of an outer circle formed by the plurality of locking blocks in the circumferential direction, the diameter of an inner ring of the locking ring is not smaller than that of the outer circle formed by the plurality of locking blocks in the circumferential direction, and a gap for the locking blocks to pass through is formed between every two adjacent locking blocks;

when the piston extends to the limit position, the locking block passes through the gap and does not interfere with the locking block.

By adopting the technical scheme, an operator adjusts the rotation of the milling head in advance to enable the gap to be adjusted to be opposite to the corresponding locking block, then the driving piston extends to enable the locking block to penetrate through the gap, the milling head is rotated again to enable the locking block to be hooked and connected with the locking block, the driving piston contracts to enable the locking ring to be pressed on the assembling seat, and the locking blocks are matched with the locking blocks to be favorable for improving the stability of the locking ring locked and connected with the main shaft and the stability of the milling head connected with the main shaft.

In a specific possible embodiment, the positioning component comprises a first positioning pin arranged on the assembling seat and a first pin hole arranged on the locking element;

after the locking piece is hooked with the locking piece, the first positioning pin is inserted into the first pin hole in the process of piston contraction.

Through adopting above-mentioned technical scheme, a locating pin cooperation pinhole one on the one hand is favorable to restricting the closure pressfitting to take place to rotate after on the assembly seat, improves the stability of closure and cutter head, and on the other hand is favorable to the position of accurate positioning closure pressfitting assembly seat, improves the precision that cutter head and main shaft butt joint.

In a specific possible embodiment, the assembly seat is provided with at least two position sensors facing the piston, the piston is provided with at least two detection gaskets, and the detection gaskets are matched with the position sensors;

when the piston extends to the extent that the locking block passes through the gap and does not interfere with the locking block, at least one position sensor relatively senses one of the detection gaskets;

when the piston is contracted to the state that the locking ring is positioned and pressed on the assembling seat, at least one position sensor relatively senses the other detection gasket.

By adopting the technical scheme, when an operator drives the piston to drive the locking ring to pass through the gap and not interfere with the locking block and drives the locking ring to press the assembling seat, at least one position sensor is arranged on the assembling seat to cooperate with the detection gasket to timely convey a piston position signal, so that the extension and the contraction of the piston are timely determined, and the piston is timely stopped to move.

In a specific possible implementation scheme, the assembling seat is provided with an oil conveying channel for externally connecting an oil pump, the connecting seat is provided with an oil inlet channel, and the oil inlet channel is used for supplying oil towards the inside of the milling head and driving the milling head to loosen a milling cutter;

when the butt joint locking assembly is locked with the connecting seat, the oil conveying channel is communicated with the oil inlet channel.

By adopting the technical scheme, after the assembly seat and the connecting seat are locked and connected by the butt joint locking component by an operator, the oil delivery channel can convey oil towards the oil inlet channel, so that the cutter loosening of the milling head is controlled, the phenomenon that the oil supply pipeline of the milling head is directly connected to the connecting seat and interferes the rotation reversing of the milling head and the milling cutter is avoided, and the rapid rotation or the replacement of the milling head by the operator is facilitated.

In a specific possible implementation scheme, a second positioning pin is arranged at the end part, facing the piston, in the assembling seat, the axial direction of the second positioning pin is parallel to the axial direction of the piston, and a second pin hole for the second positioning pin to be inserted is formed in the piston;

and in the process of extending and retracting the piston, the second positioning pin slides in the second pin hole.

Through adopting above-mentioned technical scheme, locating pin two is pegged graft in pinhole two and along with the piston is flexible provides spacing, guide effect, improves piston concertina movement's stability, avoids producing the problem that the circumferential offset caused locking piece, locking piece to interfere in the piston motion process.

In a specific implementation, the piston is towards the outer wall of assembly seat internal perisporium has seted up a plurality of seal ring groove one, and is a plurality of seal ring groove one is followed the axial of piston sets gradually, and is a plurality of seal groove one distributes in proper order two the oil feed chamber carry on the back mutually both sides and relative between, be provided with sealing washer one in the seal ring groove one.

Through adopting above-mentioned technical scheme, a plurality of seal ring grooves cooperate the sealing washer one to improve the logical oil leakproofness in oil feed chamber, are favorable to keeping oil feed chamber oil pressure stable.

In summary, the present application includes at least one of the following beneficial technical effects:

an operator can quickly realize the separation or locking connection of the assembling seat and the connecting seat by driving the butt joint locking component, the positioning component guides the assembling seat to quickly position and connect the connecting seat, the main shaft is assisted to quickly transmit and connect the milling head, the assembling structure of the main shaft and the milling head is facilitated to be simplified, the operator can rotate the milling head through external assistance to complete the steering of the milling head and a milling cutter, and different milling heads are convenient to disassemble and replace;

an operator pre-adjusts the rotation of the milling head to adjust the gap to be opposite to the corresponding locking block, then drives the piston to extend to enable the locking block to pass through the gap, rotates the milling head again to adjust the locking block to hook the locking block, drives the piston to contract to press the locking ring on the assembling seat, and the plurality of locking blocks are matched with the plurality of locking blocks to be beneficial to improving the stability of the locking ring and the stability of the connection of the milling head and the main shaft;

after the assembly seat and the connecting seat are locked and connected by the butt joint locking component, an operator can convey oil towards the oil inlet channel through the oil conveying channel, so that cutter loosening of the milling head is controlled, the phenomenon that an oil supply pipeline of the milling head is directly connected to the connecting seat and interferes with the rotation reversing of the milling head and the milling cutter is avoided, and the rapid rotation or the replacement of the milling head is facilitated for the operator.

Drawings

Fig. 1 is a schematic structural diagram for showing a state that the assembly seat and the butt-joint locking component are separated from the connecting seat and the milling head in the embodiment of the application.

Fig. 2 is an exploded view of an embodiment of the present application for embodying an assembly cup, a piston, a cup cover, a lock ring, a first alignment pin, a second alignment pin, and a detection gasket.

Fig. 3 is a partial sectional view for showing a state that the spindle clamps the milling head in the embodiment of the present application.

Fig. 4 is an exploded view of an embodiment of the present application for embodying the connecting block, locking ring, locking block, gap and milling head.

Fig. 5 is an exploded view of an embodiment of the present application for embodying a position sensor and detecting a gasket installation position.

Fig. 6 is a partial cross-sectional view for showing the relative positions of the position sensor and the detection pad when the spindle clamps the milling head in the embodiment of the present application.

Fig. 7 is a partial cross-sectional view of the position sensor and the detection pad for showing the relative position when the piston moves down to the state where the locking block is separated from the locking block in the embodiment of the present application.

Reference number legend, 1, main shaft; 11. a ram; 111. a wiring hole; 2. assembling a seat; 21. an oil inlet cavity; 211. an upper oil inlet; 212. a lower oil inlet; 22. a seat cover; 221. a placing groove; 222. a second sealing ring groove; 223. a second sealing ring; 224. a butt joint hole; 23. a first positioning pin; 231. injection molding holes; 24. an oil delivery passage; 25. a second positioning pin; 26. a wiring hole; 3. a milling head; 31. a drive shaft; 32. milling a cutter interface; 4. a connecting seat; 41. locking the ring; 411. a locking block; 412. a gap; 413. a first pin hole; 414. a third sealing ring groove; 415. a third sealing ring; 416. an oil path; 42. a connecting disc; 43. a third positioning pin; 44. an oil inlet channel; 441. an oil outlet hole; 5. a butt-joint locking component; 51. a piston; 511. a pin hole II; 512. a first sealing ring groove; 513. a first sealing ring; 52. a locking ring; 521. a locking block; 6. a position sensor; 61. and detecting the gasket.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses a milling head connecting structure for a numerical control gantry machining center. Referring to fig. 1, in this embodiment, a universal spindle 1 and a right-angle milling head 3 of a milling machine are taken as an example, a ram 11 for assisting the spindle 1 to move is installed on the outer side of the spindle 1, and the transmission principle of the spindle 1 and the milling head 3 and the structural principle of the milling head 3 for clamping the milling tool are the prior art, and are not described herein again.

Referring to fig. 1 and 2, the milling head connecting structure for the numerical control gantry machining center comprises an assembling seat 2 sleeved on the outer side of a main shaft 1 and a connecting seat 4 installed at the top end of a milling head 3. The assembly seat 2 is internally provided with a butt joint locking component 5, and the butt joint locking component 5 extends out from the lower end of the assembly seat 2 and is used for locking the assembly seat 2 and the connecting seat 4.

An operator clamps the milling head 3 to be used through the milling tool interface 32, and then places the milling head 3 on a milling machine workbench in advance, so that the milling machine workbench supports the milling head 3. The milling head 3 is rotated to adjust the processing orientation of the milling cutter, meanwhile, the main shaft 1 is driven to drive the assembling seat 2 to align with the connecting seat 4, the axis of a transmission shaft 31 of the milling head 3 is collinear with the axis of the main shaft 1, then the main shaft 1 is lowered and drives the butt-joint locking component 5 to lock the connecting seat 4, the main shaft 1 is in transmission connection with the milling head 3, and therefore rotation and clamping of the milling head 3 are completed. And driving the main shaft 1 to move and lift again, so that the milling head 3 is separated from the milling machine workbench, and then the milling head 3 and the milling cutter can be used for processing the workpiece.

It will be appreciated that when the milling head 3 needs to be replaced, the spindle 1 is lowered and the butt-joint locking assembly 5 is released, so that the milling head 3 is disengaged from the spindle 1, and the milling head 3 is replaced and clamped again. An operator can use an external rotating mechanism to independently arrange on a milling machine workbench to complete the work of rotating and reversing the auxiliary milling head 3, on one hand, the assembly structure of the main shaft 1 and the milling head 3 is facilitated to be simplified, the flexibility of assembling the milling head 3 and a milling cutter on the main shaft 1 is improved, on the other hand, the milling cutter is rapidly rotated and switched to the processing orientation, the flexible replacement of the milling head 3 by the operator is facilitated, and the convenience of replacing the milling head 3 is improved.

Referring to fig. 3 and 4, the butt lock assembly 5 includes a piston 51 axially slidably disposed in the mounting seat 2 along the main shaft 1 and a lock member coaxially mounted at a bottom end of the piston 51. The bottom end of the mounting seat 2 is provided with a seat cover 22, and the seat cover 22 is used for abutting against the connecting seat 4 and limiting the elongation limit of the piston 51.

A convex ring for abutting against the inner peripheral wall of the mounting seat 2 is formed at the axial middle portion of the piston 51, so that one oil inlet chamber 21 is formed between the upper portion of the piston 51 and the inner top of the mounting seat 2, and another oil inlet chamber 21 is formed between the lower portion of the piston 51 and the inner bottom of the mounting seat 2 and the seat cover 22. Correspondingly, the side wall of the assembly seat 2 is provided with an upper oil inlet 211 and a lower oil inlet 212, wherein the upper oil inlet 211 is communicated with the oil inlet cavity 21 at the upper part, and the upper oil inlet 211 is used for pumping oil by an external oil pump to drive the piston 51 to extend; the lower oil inlet 212 is communicated with the oil inlet cavity 21 at the lower part, and the lower oil inlet 212 is used for pumping oil by an external oil pump to drive the piston 51 to contract.

Referring to fig. 4 and 5, the connecting seat 4 includes a connecting plate 42 mounted at the top end of the milling head 3 and allowing the transmission shaft 31 of the milling head 3 to pass through, and a locking element is mounted coaxially on the top surface of the connecting plate 42 and is used in cooperation with the locking element.

Referring to fig. 3, in the present embodiment, the locking member is configured as a locking ring 52, four locking blocks 521 are uniformly circumferentially disposed on the outer circumferential wall of the locking ring 52, and the four locking blocks 521 and the locking ring 52 may be integrally formed.

Correspondingly, referring to fig. 4 and 5, in the present embodiment, the locking element is configured as a locking ring 41, four locking blocks 411 are uniformly arranged on the inner circumferential wall of the locking ring 41 in the circumferential direction, and the four locking blocks 411 and the locking ring 41 can be manufactured by integral molding. The four locking blocks 411 correspond to the four locking blocks 521 one by one.

In this embodiment, the diameter of the inner circle formed by the four locking blocks 411 in the circumferential direction is smaller than the diameter of the outer circle formed by the four locking blocks 521 in the circumferential direction and larger than the diameter of the inner circle of the locking ring 52, meanwhile, the diameter of the inner circle of the locking ring 41 is larger than the diameter of the outer circle formed by the plurality of locking blocks 521 in the circumferential direction, and a gap 412 for the single locking block 521 to pass through is formed between the adjacent locking blocks 411.

An operator drives the external oil pump to feed oil in a reciprocating manner in the two oil inlet cavities 21, so that the piston 51 can flexibly extend and retract. When the piston 51 extends to the limit position and maintains the oil pressure of the oil inlet chamber 21, the locking block 521 passes through the gap 412 and does not abut against the bottom surface of the locking block 411. After the locking block 521 is rotated to be opposite to the locking block 411, the top surface of the locking ring 41 can be positioned and pressed at the bottom end of the seat cover 22 during the contraction process of the piston 51, and at this time, the spindle 1 is in transmission connection with the transmission shaft 31 of the milling head 3. External oil pump oil is favorable to keeping the stable pressfitting of closure on assembly seat 2, improves the stability that main shaft 1 is connected to cutter head 3. The four locking blocks 521 are uniformly matched with the four locking blocks 411 in the circumferential direction, which is beneficial to improving the stability of the locking ring 52 locking the locking ring 41 and the stability of the connection between the milling head 3 and the main shaft 1.

In order to quickly and accurately position the docking locking ring 41 and the seat cover 22, referring to fig. 2, 3 and 4, a positioning assembly is cooperatively disposed between the seat cover 22 and the locking ring 41, and the positioning assembly includes two docking holes 224 opened on the outer periphery of the seat cover 22, and the two docking holes 224 are centrosymmetric with respect to the axis of the seat cover 22. A first positioning pin 23 is inserted into the abutting hole 224, and the bottom end of the first positioning pin 23 extends out of the bottom surface of the seat cover 22. Correspondingly, the top surface of the locking ring 41 is provided with four pin holes 413 for the positioning pins 23 to be inserted. When the four locking blocks 411 and the four locking blocks 521 are in one-to-one correspondence and hooked connection, the two positioning pins one 23 and the two pin holes one 413 are in one-to-one correspondence and have collinear axes, at this time, the piston 51 can be driven to pull the locking ring 41 to be pressed on the seat cover 22, the positioning pins one 23 are inserted into the corresponding pin holes one 413, rotation of the locking ring 41 after being pressed on the seat cover 22 is favorably limited, stability of the locking ring 41 and the milling head 3 is improved, meanwhile, the two pin holes one 413 and the two positioning pins one 23 are matched to accurately position the position of the locking ring 41 pressing assembly seat 2, and accuracy of butt joint of the milling head 3 and the spindle 1 is improved.

In order to improve the matching accuracy of the first positioning pin 23 and the first pin hole 413, referring to fig. 3, when the operator opens the first pin hole 413, the radial dimension of the first pin hole 413 is set to be larger than that of the first positioning pin 23 in advance, and an injection molding hole 231 is formed in the axis of the first positioning pin 23 in a penetrating manner. After the first positioning pin 23 is inserted into the first pin hole 413, an operator injects plastic into the first pin hole 413 through the injection hole 231 to fill up the clearance between the first pin hole 413 and the first positioning pin 23, so that the first pin hole 413 which is matched with the first positioning pin 23 accurately is formed.

In order to supply oil to the milling head 3 to rapidly release and replace the milling cutter of the milling head 3, referring to fig. 2 and 3, an oil delivery channel 24 is formed in the mounting seat 2, and the oil delivery channel 24 is communicated with the injection molding hole 231. Correspondingly, an oil inlet passage 44 penetrates downwards from the lower end of the first pin hole 413 in the locking ring 41, and an oil passage 416 communicated with the oil inlet passage 44 is formed in the bottom surface of the locking ring 41. The outer wall of the locking ring 41 is provided with an oil outlet 441 communicated with the oil inlet channel 44.

By externally connecting an oil pump to the opening end of the oil delivery channel 24, after the locking ring 41 is pressed on the bottom surface of the seat cover 22, the oil delivery channel 24 is communicated with the injection molding hole 231, the oil inlet channel 44, the oil path 416 and the oil outlet hole 441, and an operator can supply oil to the milling head 3 after connecting the oil outlet hole 441 and the milling head 3 through a pipeline, so that quick cutter loosening can be realized. It can be understood that the milling head 3, the locking ring 41 and the connecting disc 42 need to be rotated and reversed to adjust the machining direction of the milling cutter, and the oil delivery channel 24 is matched with the injection hole 231, the oil inlet channel 44, the oil passage 416 and the oil outlet hole 441 to deliver oil, so that the external oil pump pipeline for supplying oil to the milling head 3 is prevented from being directly connected to the milling head 3 and the connecting seat 4 and causing interference on the rotation and reversing of the milling head 3 and the milling cutter, and an operator can conveniently rotate or replace the milling head 3 quickly.

In order to quickly determine the relative positions of the locking ring 52, the locking block 521, the locking ring 41 and the locking block 411 and timely control the piston 51 to lock and unlock the milling head 3, referring to fig. 5 and 6, two seating grooves 221 are formed in the bottom surface of the seat cover 22, the two seating grooves 221 are distributed along the circumferential direction of the seat cover 22 at an angle of 45 degrees, and a position sensor 6 is installed in the seating groove 221. Correspondingly, two detection gaskets 61 are circumferentially arranged at the bottom of the outer peripheral wall of the piston 51, and the two detection gaskets 61 correspond to and are matched with the two position sensors 6 one by one.

Further, referring to fig. 6 and 7, the detection trigger end of one of the detection pads 61 is axially spaced from the detection trigger end of the other detection pad 61 along the piston 51. When the piston 51 extends to the point that the locking block 521 passes through the gap 412 and does not contact with the bottom surface of the locking block 411, one of the position sensors 6 relatively senses one of the detection gaskets 61; when the piston 51 is retracted to the position where the locking ring 41 is pressed on the seat cover 22, the other position sensor 6 senses the other sensing pad 61.

In addition, a wiring hole 111 is pre-opened in the ram 11, and correspondingly, the assembly base 2 is provided with a wiring hole 26 for connecting the wiring hole 111 and the installation groove 221, so that a lead of the position sensor 6 can be conveniently connected and led out.

It can be understood that when the operator drives the piston 51 to drive the locking block 521 to pass through the gap 412 and not interfere with the locking block 411, one of the position sensors 6 cooperates with the corresponding detection pad 61 to timely output a signal that the piston 51 is extended to the right position; when an operator drives the piston 51 to drive the locking ring 41 to press the bottom end of the seat cover 22, the other position sensor 6 is matched with the detection gasket 61 to timely transmit a signal that the piston 51 contracts to the right position, so that the piston 51 can be timely determined to be extended and contracted to the right position and the movement of the piston 51 can be timely stopped, and the problem of interference of the locking block 521 and the locking block 411 in the operation process is solved.

In order to improve the stability of the telescopic motion of the piston 51 and avoid the problem of interference of the locking block 411 and the locking block 521 caused by circumferential deviation in the motion process of the piston 51, referring to fig. 2 and 3, a pin hole II 511 is formed in the top surface of the outer convex ring of the piston 51, correspondingly, a positioning pin II 25 is installed on the inner top wall of the assembling seat 2, the axial direction of the positioning pin II 25 is parallel to the axial direction of the piston 51, and the positioning pin II 25 is inserted into the pin hole II 511 and provides limiting and guiding effects along with the telescopic motion of the piston 51.

In order to improve the oil-feeding tightness of the oil inlet cavity 21, the seat cover 22 and the oil passage 416, referring to fig. 2 and 3, a plurality of first sealing ring grooves 512 are sequentially formed in the outer peripheral wall of the piston 51 along the axial direction of the piston, and first sealing rings 513 are arranged in the first sealing ring grooves 512; a plurality of second sealing ring grooves 222 are respectively formed in the two opposite sides of the inner wall of the assembly seat 2 and the outer side of the seat cover 22 facing the piston 51, and second sealing rings 223 are arranged in the second sealing ring grooves 222; the bottom end wall of the locking ring 41 is provided with three sealing ring grooves 414 on two opposite sides of the oil passage, and three sealing rings 415 are arranged in the three sealing ring grooves 414.

In order to position and arrange the milling head 3 and the connecting disc 42 conveniently, referring to fig. 6, the bottom surface of the connecting disc 42 can be pre-assembled with a third positioning pin 43, an operator can preset a rotating device on a milling machine workbench to position and bear the connecting disc 42 and the milling head 3, and the arrangement position of the milling head 3 can be quickly positioned through the third positioning pin 43.

The implementation principle of the milling head connecting structure for the numerical control gantry machining center in the embodiment of the application is as follows:

a milling head clamping process:

the method comprises the following steps of placing a milling head 3 to be used on a milling machine workbench in advance, and rotating the milling head 3 by 45 degrees clockwise from an initial installation position about the axis of a transmission shaft 31;

the upper oil inlet 211 pumps oil to enable the piston 51 to drive the locking ring 52 to move downwards to the limit position;

the main shaft 1 is moved to integrally move the assembly seat 2 to the position above the milling head 3, so that the axis of the transmission shaft 31 of the milling head 3 is collinear with the axis of the main shaft 1, then the assembly seat 2 is driven to integrally fall, at the moment, the four locking blocks 411 are staggered with the four locking blocks 521, and the locking blocks 521 pass through the gaps 412 until the locking blocks 411 are not attached;

the rotary milling head 3 rotates 45 degrees anticlockwise around the axis of the transmission shaft 31, and the first positioning pin 23 is concentric with the first pin hole 413;

continuing to lower the main shaft 1 to ensure that the top surface of the locking ring 41 is not attached to the base cover 22, pumping oil from the lower oil inlet 212 to ensure that the piston 51 drives the locking ring 52 to be upwards tensioned, so that the locking ring 41 is pressed on the bottom surface of the base cover 22, and inserting the positioning pin I23 into the corresponding pin hole I413, wherein the oil pressure is kept constant at the moment, and the rotation and locking of the milling head 3 are completed;

the driving main shaft 1 drives the milling head 3 to separate from the milling machine workbench.

The reversing process of the milling head comprises the following steps:

after finishing processing one side surface of the workpiece, driving the main shaft 1 to drive the milling head 3 to return along a set route away from the placing position of the milling head 3, and placing the milling head 3 on the workbench of the milling machine again;

the oil is pumped by the upper oil inlet 211, the piston 51 is driven to drive the locking ring 52 to fall to the limit position and keep the pressure constant, at the moment, the locking ring 52 is separated from the locking ring 41, and the locking block 521 does not contact the locking block 411;

the driving main shaft 1 drives the assembly seat 2 to lift upwards, at the moment, the first positioning pin 23 is completely separated from the first pin hole 413, and the locking ring 52 is not in contact with the locking ring 41;

the milling head 3 rotates to integral multiple of 90 degrees about the axis of the transmission shaft 31, then the lower oil inlet 212 pumps oil to enable the piston 51 to drive the locking ring 52 to be upwards tensioned, the four locking blocks 521 are used for tensioning the four locking blocks 411 again, the locking ring 41 is pressed on the bottom surface of the seat cover 22, and at the moment, the oil pressure is kept constant, and the reversing locking of the milling head 3 is completed;

the driving main shaft 1 drives the milling head 3 to separate from the milling machine workbench.

The embodiments of the present invention are preferred embodiments of the present application, and the scope of protection of the present application is not limited by the embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a numerical control longmen is milling head connection structure for machining center which characterized in that: the milling head comprises an assembly seat (2) arranged on a main shaft (1) and a connecting seat (4) arranged on a milling head (3), wherein a butt joint locking component (5) used for locking the connecting seat (4) is arranged in the assembly seat (2);

the milling head is characterized in that a positioning assembly is arranged between the assembling seat (2) and the connecting seat (4) in a matched mode, when the butt joint locking assembly (5) is locked to the connecting seat (4), the positioning assembly guides the assembling seat (2) and the connecting seat (4) to be positioned and connected, and the main shaft (1) is in transmission connection with the milling head (3).

2. The milling head connecting structure for the numerical control gantry machining center according to claim 1, characterized in that: the butt joint locking assembly (5) comprises a piston (51) which is arranged in the assembly seat (2) in a sliding mode along the axial direction of the main shaft (1), two oil inlet cavities (21) are formed between the piston (51) and the assembly seat (2), and the oil inlet cavities (21) are used for being externally connected with an oil pump and driving the piston (51) to do telescopic motion along the axial direction of the main shaft (1);

the piston (51) is provided with a locking piece which is used for extending out of the assembling seat (2), and the connecting seat (4) is provided with a locking piece for hooking the locking piece;

after the locking piece is hooked with the locking piece, in the process that the piston (51) contracts, the locking piece is positioned and pressed on the assembling seat (2).

3. The milling head connecting structure for the numerical control gantry machining center according to claim 2, characterized in that: the locking piece is arranged to be a locking ring (52), a plurality of locking blocks (521) are arranged on the outer circumferential wall of the locking ring (52) in the circumferential direction, the locking piece is arranged to be a locking ring (41), and a plurality of locking blocks (411) are arranged on the inner circumferential wall of the locking ring (41) in the circumferential direction;

the inner circle diameter formed by the plurality of locking blocks (411) in the circumferential direction is smaller than the outer circle diameter formed by the plurality of locking blocks (521) in the circumferential direction, the inner ring diameter of the locking ring (41) is not smaller than the outer circle diameter formed by the plurality of locking blocks (521) in the circumferential direction, and a gap (412) for the locking blocks (521) to pass through is formed between every two adjacent locking blocks (411);

when the piston (51) extends to the limit position, the locking block (521) passes through the gap (412) and does not interfere with the locking block (411).

4. The milling head connecting structure for the numerical control gantry machining center according to claim 2, characterized in that: the positioning component comprises a first positioning pin (23) arranged on the assembling seat (2) and a first pin hole (413) arranged on the locking piece;

after the locking piece is hooked with the locking piece, in the contraction process of the piston (51), the first positioning pin (23) is inserted into the first pin hole (413).

5. The milling head connecting structure for the numerical control gantry machining center according to claim 3, wherein: the assembling seat (2) is provided with at least two position sensors (6) facing the piston (51), the piston (51) is provided with at least two detection gaskets (61), and the detection gaskets (61) are matched with the position sensors (6);

when the piston (51) extends to the locking block (521) to pass through the gap (412) and does not interfere with the locking block (411), at least one position sensor (6) relatively senses one of the detection gaskets (61);

when the piston (51) is contracted until the locking ring (41) is positioned and pressed on the assembling seat (2), at least one position sensor (6) relatively senses the other detection gasket (61).

6. The milling head connecting structure for the numerical control gantry machining center according to claim 1, characterized in that: the assembly seat (2) is provided with an oil conveying channel (24) for being externally connected with an oil pump, the connecting seat (4) is provided with an oil inlet channel (44), and the oil inlet channel (44) is used for supplying oil towards the inside of the milling head (3) and driving the milling head (3) to loosen a milling cutter;

when the butt joint locking assembly (5) is locked with the connecting seat (4), the oil conveying channel (24) is communicated with the oil inlet channel (44).

7. The milling head connecting structure for the numerical control gantry machining center according to claim 2, characterized in that: a second positioning pin (25) is arranged at the end part, facing the piston (51), in the assembling seat (2), the axial direction of the second positioning pin (25) is parallel to the axial direction of the piston (51), and a second pin hole (511) for the second positioning pin (25) to be inserted is formed in the piston (51);

and in the process of extending and retracting the piston (51), the second positioning pin (25) slides in the second pin hole (511).

8. The milling head connecting structure for the numerical control gantry machining center according to claim 2, characterized in that: piston (51) orientation a plurality of sealed annular (512) have been seted up to the outer wall of assembly seat (2) internal perisporium, and are a plurality of sealed annular (512) are followed the axial of piston (51) sets gradually, and is a plurality of sealed annular distributes in proper order two the both sides of carrying on the back of the body and relative between oil feed chamber (21), be provided with sealing washer (513) in the sealed annular.

Images