High speed numerical control drilling and milling combined machine tool

Abstract

The application discloses a high-speed numerical control drilling and milling combined machine tool, which comprises a workbench, a supporting frame, a moving frame, a mounting block, a cylinder and a drilling and milling mechanism, the supporting frame is fixedly connected to the top of the workbench, the moving frame is slidably connected to the top of the supporting frame, the mounting block is slidably connected to the top of the moving frame, the cylinder is fixedly connected to the middle part of the mounting block, and the drilling and milling mechanism is arranged at the output end of the cylinder; the design of the sliding block enables multiple cutters to be installed on the rotating disc, the design of the path groove enables the cutters to move to the center of the rotating disc and be accommodated into the cover shell when not in use, so that the use space of the machine tool is reduced, and in addition, the design of the transmission shaft, the sleeve, the spline groove and the spline block enables all the cutters to be driven by only one drilling and milling motor when in use, so that the equipment cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of drilling and milling machine tools, in particular to a high-speed numerical control drilling and milling combined machine tool. BACKGROUND

[0002] The drilling and milling combined machine tool is a device integrating drilling and milling two core functions, and the traditional workpiece processing needs to drill holes on a drilling machine first and then transfer to a milling machine to mill the shape. Each time re-clamping will produce a small positioning error, and these errors will accumulate to affect the accuracy of the final product. Through the drilling and milling combined machine tool processing, the workpiece only needs to be clamped once, and all drilling and milling processes are completed by one machine tool, eliminating the cumulative error caused by multiple clamping.

[0003] Through retrieval, a plate drilling and milling integrated machine is disclosed in a Chinese patent with publication number CN105881026B, belonging to the technical field of machinery. It solves the problem that the existing technology cannot conveniently realize drilling and milling of the plate. The plate drilling and milling integrated machine includes a support and a mounting frame, the mounting frame is provided with a drill and a milling cutter, the support includes a bottom plate, a support plate one and a support plate two, the mounting frame includes a horizontal plate one, a horizontal plate two and a vertical plate, the horizontal plate one and the horizontal plate two are provided with a lifting plate one and a lifting plate two, the horizontal plate one and the horizontal plate two are fixed with a motor two, the motor two is fixed with a connecting plate one, the connecting plate one is fixed with a connecting plate two and a connecting plate three, the connecting plate two is fixed with a motor three, the milling cutter is fixed on the motor three, the connecting plate three is fixed with a motor four, and the drill is fixed on the motor four. The base is provided with an adjusting plate, the adjusting plate is provided with a base, and the upper surface of the base is provided with a clamp.

[0004] In the above-mentioned technology, the motor three drives the milling cutter to rotate, the motor four drives the drill to rotate, and the motor two drives the connecting plate one to rotate, so as to realize the replacement of the drill and the milling cutter. However, the above-mentioned device needs to be driven by a motor when replacing the tool, and each rotation of the tool needs to be driven by a separate motor. When many tools need to be installed on the device, the corresponding number of motors need to be provided. This not only increases the cost of the device, but also occupies a large amount of machine tool space, thereby affecting the installation of other parts and the flexibility of subsequent processing. SUMMARY

[0005] The purpose of the present application is to provide a high-speed numerical control drilling and milling combined machine tool to solve the problem of inconvenient tool replacement of the existing drilling and milling machine tool.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a high-speed numerical control drilling and milling combined machine tool, including a workbench, further comprising:

[0007] A support frame is fixedly connected to the top of the workbench.

[0008] The moving frame is slidably connected to the top of the support frame;

[0009] The mounting block is slidably connected to the top of the moving frame;

[0010] The cylinder is fixedly connected to the middle of the mounting block;

[0011] The drilling and milling mechanism is arranged at the output end of the cylinder.

[0012] Preferably, the drilling and milling mechanism comprises a housing, a rotating disc and a sliding block, one end of the inner wall of the housing is rotatably connected with the rotating disc, one side of the rotating disc is slidably connected with four sliding blocks, one end of the sliding block is fixedly connected with a protruding block, one end of the protruding block is rotatably connected with a sleeve, one end of the sleeve away from the center of the rotating disc is fixedly connected with a cutter, one end of the inner wall of the housing is provided with a path groove, one end of the protruding block is fixedly connected with a sliding pin, and the sliding pin is slidably connected with the path groove.

[0013] Preferably, the side wall of the housing inside the path groove is provided with a through groove, one end of the through groove is slidably connected with a moving block, one end of the moving block inside the housing is fixedly connected with a drilling and milling motor, the output end of the drilling and milling motor is fixedly connected with a transmission shaft, the transmission shaft is slidably connected with the sleeve, the side wall of the transmission shaft is provided with a plurality of spline grooves, the inner wall of the sleeve is fixedly connected with a plurality of spline blocks matched with the spline grooves, the bottom of the spline groove is provided with a trumpet-shaped opening, and the top of the spline block is fixedly connected with a conical head.

[0014] Preferably, the outer wall of the housing above the through groove is fixedly connected with a first spring telescopic rod, the bottom of the first spring telescopic rod is fixedly connected with the moving block, the two ends of the moving block are respectively fixedly connected with connecting arms, the top of the connecting arm is fixedly connected with a first rack, the outer wall of the housing between the two first racks is rotatably connected with two transmission gears, the two transmission gears are respectively meshingly connected with the two first racks, one end of the bottom of the mounting block is fixedly connected with a second spring telescopic rod, the bottom of the second spring telescopic rod is fixedly connected with a connecting frame, the bottom of the connecting frame is respectively fixedly connected with second racks matched with the transmission gears at both ends, and the two second racks are located between the two transmission gears.

[0015] Preferably, one end of the rotating disc is fixedly connected with a rotating shaft, the rotating shaft is rotatably connected with the housing, one end of the rotating shaft extends to the outside of the housing and is rotatably connected with a driven gear, one end of the bottom of the mounting block is fixedly connected with a support arm, and the bottom of the support arm is fixedly connected with a third rack matched with the driven gear.

[0016] Preferably, one end of the driven gear is fixedly connected with a first ratchet wheel, one end of the side wall of the driven gear is rotatably connected with a first ratchet pawl, the first ratchet pawl is in meshing connection with the first ratchet wheel, one end of the first ratchet pawl is provided with a first tension spring, and the other end of the first tension spring is mounted on one end of the driven gear.

[0017] Preferably, one end of the driven gear is fixedly connected with a first ratchet wheel, one end of the side wall of the driven gear is rotatably connected with a first ratchet pawl, the first ratchet pawl is in meshing connection with the first ratchet wheel, one end of the first ratchet pawl is provided with a first tension spring, and the other end of the first tension spring is mounted on one end of the driven gear.

[0018] Preferably, one end of the driven gear is fixedly connected with a first ratchet wheel, one end of the side wall of the driven gear is rotatably connected with a first ratchet pawl, the first ratchet pawl is in meshing connection with the first ratchet wheel, one end of the first ratchet pawl is provided with a first tension spring, and the other end of the first tension spring is mounted on one end of the driven gear.

[0019] Preferably, one end of the driven gear is fixedly connected with a first ratchet wheel, one end of the side wall of the driven gear is rotatably connected with a first ratchet pawl, the first ratchet pawl is in meshing connection with the first ratchet wheel, one end of the first ratchet pawl is provided with a first tension spring, and the other end of the first tension spring is mounted on one end of the driven gear.

[0020] Preferably, one end of the driven gear is fixedly connected with a first ratchet wheel, one end of the side wall of the driven gear is rotatably connected with a first ratchet pawl, the first ratchet pawl is in meshing connection with the first ratchet wheel, one end of the first ratchet pawl is provided with a first tension spring, and the other end of the first tension spring is mounted on one end of the driven gear.

[0021] Compared with the prior art, the present application has the following advantages:

[0022] The design of the sliding block allows multiple cutters to be installed on the rotating disc, and the design of the path groove allows the cutters to move towards the center of the rotating disc and be stored in the cover shell when not in use, thereby reducing the use space of the machine tool.

[0023] The application can drive the transmission gear to rotate when the cylinder moves upward along with the driving shell, the rotating disc, the cutter and the drilling and milling motor, so as to further accelerate the upward moving speed of the first rack, the connecting arm, the moving block, the drilling and milling motor and the transmission shaft, and the transmission shaft is gradually moved out of the sleeve until completely moved above the sleeve, so as to facilitate the replacement of the subsequent cutter;

[0024] The third rack, the first ratchet wheel and the first pawl are designed, so that the shell and the driven gear can drive the driven gear to rotate during upward movement, and then drive the first pawl to revolve, so that the first ratchet wheel, the rotating shaft and the rotating disc can rotate under the pushing of the first pawl, so as to realize the replacement of the cutter, and the second ratchet wheel and the second pawl are designed, so that the rotation generated when the driven gear moves downward is not transmitted to the rotating shaft and the cutter, so as to ensure that the position of the replaced cutter remains unchanged. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a three-dimensional structure schematic diagram of the application;

[0026] Figure 2 It is a mounting block and drilling mechanism connection structure schematic diagram in the application;

[0027] Figure 3 It is another view structure schematic diagram of Figure 2 ;

[0028] Figure 4 It is a drilling mechanism structure schematic diagram in the application;

[0029] Figure 5 It is a rotating disc and sliding block connection structure schematic diagram in the application;

[0030] Figure 6 It is a sliding pin and path slot connection structure schematic diagram in the application;

[0031] Figure 7 It is a transmission shaft and sleeve position relationship structure schematic diagram in the application;

[0032] Figure 8 It is a spline groove and spline block structure schematic diagram in the application;

[0033] Figure 9 It is a driven gear sectional structure schematic diagram in the application;

[0034] Figure 10 It is a local enlarged structure schematic diagram of A in Figure 9 ;

[0035] In the figure: 1, workbench; 2, support frame; 3, moving frame; 4, mounting block; 5, air cylinder; 6, drilling and milling mechanism; 601, cover; 602, rotating disc; 603, sliding block; 604, protruding block; 605, sleeve; 606, cutter; 607, path groove; 608, sliding pin; 609, through groove; 610, moving block; 611, drilling and milling motor; 612, transmission shaft; 613, spline groove; 614, spline block; 615, trumpet-shaped opening; 616, tapered head; 617, first spring telescopic rod; 618, connecting arm; 619, first rack; 620, transmission gear; 621, rotating shaft; 622, driven gear; 623, first ratchet wheel; 624, first pawl; 625, first tension spring; 626, second ratchet wheel; 627, second pawl; 628, second tension spring; 629, fixed block; 630, sliding rod; 631, limiting block; 632, limiting groove; 633, return spring; 634, U-shaped frame; 635, roller; 7, second spring telescopic rod; 8, connecting frame; 9, second rack; 10, support arm; 11, third rack; 12, guide plate; 1201, inclined part; 13, first motor; 14, first lead screw; 15, second motor; 16, second lead screw. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. The described embodiments are only some of the embodiments of the present application, not all.

[0037] Please refer to Figures 1-10 The present application provides a technical solution: a high-speed numerical control drilling and milling combined machine tool, comprising a workbench 1, further comprising a support frame 2, a moving frame 3, a mounting block 4, an air cylinder 5 and a drilling and milling mechanism 6, the support frame 2 is fixedly connected to the top of the workbench 1, the moving frame 3 is slidingly connected to the top of the support frame 2, the mounting block 4 is slidingly connected to the top of the moving frame 3, the air cylinder 5 is fixedly connected to the middle of the mounting block 4, and the drilling and milling mechanism 6 is arranged at the output end of the air cylinder 5; the top of the support frame 2 is fixedly connected with a first motor 13 at both ends, the output end of the first motor 13 is fixedly connected with a first lead screw 14, the first lead screw 14 is threadedly connected with the moving frame 3, the end of the first lead screw 14 away from the first motor 13 is rotatably connected with the support frame 2, one end of the top of the moving frame 3 is fixedly connected with two second motors 15, the output end of the second motor 15 is fixedly connected with a second lead screw 16, the two second lead screws 16 are located at both ends of the air cylinder 5, the second lead screw 16 is threadedly connected with the mounting block 4, and the end of the second lead screw 16 away from the second motor 15 is rotatably connected with the moving frame 3.

[0038] Specifically, during the drilling and milling of the workpiece, first, the workpiece is placed on the workbench 1 and fixed, and during the processing, the two first motors 13 can drive the two first lead screws 14 to rotate, thereby driving the moving frame 3, the mounting block 4, the air cylinder 5 and the drilling and milling mechanism 6 to move along the length direction of the workbench 1, and in addition, the two second motors 15 can drive the two second lead screws 16 to rotate, thereby driving the mounting block 4, the air cylinder 5 and the drilling and milling mechanism 6 to move along the width direction of the workbench 1, and in addition, the air cylinder 5 can drive the drilling and milling mechanism 6 to move up and down, and under the joint action of the first motor 13, the second motor 15 and the air cylinder 5, the drilling and milling mechanism 6 can flexibly adjust its own position, thereby performing drilling and milling on the workpiece.

[0039] As shown in Figure 5 and Figure 6 , the drilling and milling mechanism 6 includes a housing 601, a rotating disc 602 and a sliding block 603, the housing 601 is fixedly connected to the output end of the air cylinder 5, the inner wall of the housing 601 is rotatably connected with the rotating disc 602 at one end, the rotating disc 602 is slidably connected with four sliding blocks 603 at one side, the sliding blocks 603 are fixedly connected with protruding blocks 604 at one end, the protruding blocks 604 are rotatably connected with sleeves 605 at one end, the sleeves 605 are fixedly connected with cutters 606 at the end away from the center of the rotating disc 602, the housing 601 is provided with a path groove 607 at one end of the inner wall, the sliding blocks 603 are fixedly connected with sliding pins 608 at one end, and the sliding pins 608 are slidably connected with the path groove 607.

[0040] Specifically, the upper half of the path groove 607 is in a semicircular shape and concentric with the rotating disc 602, and the lower half of the path groove 607 is in a tapered shape, when it is necessary to replace the cutter 606, first, the rotating disc 602 needs to be driven to rotate, and the rotating disc 602 will drive the four sliding blocks 603 to rotate in the process, the sliding pins 608 at one end of the sliding blocks 603 will move along with the path groove 607, when the sliding pins 608 gradually move to the tapered part of the path groove 607, the sliding blocks 603 will slide on the rotating disc 602, so that the sliding blocks 603 and the cutter 606 gradually move away from the center of the rotating disc 602, when the sliding pins 608 move to the bottom of the tapered part of the path groove 607, the cutter 606 is in a vertical downward state and completely extends out of the housing 601, when the sliding pins 608 gradually move from the tapered part of the path groove 607 to the semicircular part, the sliding blocks 603 and the cutter 606 will gradually move to the rotating disc 602, so that the cutter 606 can be stored in the housing 601.

[0041] As shown in Figure 2 , Figure 4 , Figure 7 and Figure 8As shown, the sidewall of the cover 601 is provided with a through groove 609 inside the path groove 607, one end of the through groove 609 is slidably connected with a moving block 610, one end of the moving block 610 is fixedly connected with a drill milling motor 611 inside the cover 601, the output end of the drill milling motor 611 is fixedly connected with a transmission shaft 612, the transmission shaft 612 is slidably connected with the sleeve 605, the sidewall of the transmission shaft 612 is provided with a plurality of spline grooves 613, the inner wall of the sleeve 605 is fixedly connected with a plurality of spline blocks 614 matched with the spline grooves 613, the bottom of the spline groove 613 is provided with a horn-shaped opening 615, and the top of the spline block 614 is fixedly connected with a tapered head 616; the outer wall of the cover 601 is fixedly connected with a first spring telescopic rod 617 above the through groove 609, the bottom of the first spring telescopic rod 617 is fixedly connected with the moving block 610, the two ends of the moving block 610 are respectively fixedly connected with a connecting arm 618, the top of the connecting arm 618 is fixedly connected with a first rack 619, and the outer wall of the cover 601 is rotatably connected with two transmission gears 620 between the two first racks 619, the two transmission gears 620 are respectively meshedly connected with the two first racks 619, one end of the bottom of the mounting block 4 is fixedly connected with a second spring telescopic rod 7, the bottom of the second spring telescopic rod 7 is fixedly connected with a connecting frame 8, the bottom of the connecting frame 8 is fixedly connected with a second rack 9 matched with the transmission gear 620 at both ends, and the two second racks 9 are located between the two transmission gears 620.

[0042] Specifically, in the processing process, the transmission shaft 612 is inserted inside the sleeve 605, and the design of the spline groove 613 and the spline block 614 allows the transmission shaft 612 to drive the sleeve 605 to rotate, thereby driving the cutter 606 to rotate. When the cutter 606 needs to be replaced, the transmission shaft 612 needs to be separated from the sleeve 605 first, at which time the cover 601 needs to be driven upward by the air cylinder 5, thereby driving the first spring telescopic rod 617, the drilling and milling motor 611, the connecting arm 618, the first rack 619 and the transmission gear 620 to move upward together. In the process of upward movement of the transmission gear 620, it will contact and mesh with the second rack 9. At this time, under the continuous driving of the air cylinder 5, the transmission gear 620 will rotate in the process of upward movement, thereby further accelerating the upward movement speed of the first rack 619, the connecting arm 618, the moving block 610, the drilling and milling motor 611 and the transmission shaft 612. At this time, the first spring telescopic rod 617 will gradually contract, and the stiffness coefficient of the spring in the second spring telescopic rod 7 is much larger than that of the spring in the first spring telescopic rod 617, that is, the first spring telescopic rod 617 contracts, and the second spring telescopic rod 7 remains unchanged in shape. After the speed of the moving block 610 moving upward is accelerated, the moving block 610 will gradually move from the bottom of the through slot 609 to the top of the through slot 609. In addition, after the speed of the transmission shaft 612 moving upward is accelerated, it will gradually move out of the sleeve 605 until it is completely moved above the sleeve 605. At this time, the rotating disc 602 can be driven to rotate, thereby realizing the replacement of the cutter 606. When the cutter 606 is replaced, the transmission shaft 612 needs to be reinserted into the sleeve 605. At this time, the cover 601 needs to be driven downward by the air cylinder 5, thereby driving the first spring telescopic rod 617, the drilling and milling motor 611, the connecting arm 618, the first rack 619 and the transmission gear 620 to move downward together. Under the action of the transmission gear 620, the downward movement speed of the first rack 619, the connecting arm 618, the moving block 610, the drilling and milling motor 611 and the transmission shaft 612 is faster than that of the cover 601, the rotating disc 602 and the sleeve 605, so that the transmission shaft 612 can be reinserted into the sleeve 605. The design of the trumpet-shaped opening 615 and the conical head 616 allows the spline groove 613 and the spline block 614 to be automatically positioned and fitted together.

[0043] As Figure 3 Figure 9 And Figure 10As shown, the rotary disc 602 one end fixedly connected with the rotating shaft 621, the rotating shaft 621 and the cover 601 rotatably connected, the rotating shaft one end extends to the cover 601 outside, and rotatably connected with the driven gear 622, the mounting block 4 bottom one end fixedly connected with the support arm 10, the support arm 10 bottom fixedly connected with the third rack 11 adapted with the driven gear 622; The rotating shaft 621 is located at one end of the driven gear 622 fixedly connected with the first ratchet wheel 623, the driven gear 622 side wall one end rotatably connected with the first pawl 624, the first pawl 624 and the first ratchet wheel 623 meshing connection, the first pawl 624 one end is installed with the first tension spring 625, the other end of the first tension spring 625 is installed in the driven gear 622 one end; The rotating shaft 621 is fixedly connected with the second ratchet wheel 626 away from the first ratchet wheel 623 one end, the second ratchet wheel 626 is located outside the cover 601, the second ratchet wheel 626 ratchet direction is consistent with the ratchet direction of the first ratchet wheel 623, the cover 601 outer wall one end rotatably connected with the second pawl 627, the second pawl 627 and the second ratchet wheel 626 meshing connection, the second pawl 627 one end is installed with the second tension spring 628, the other end of the second tension spring 628 is installed in the cover 601 one end.

[0044] Specifically, when the cylinder 5 drives the cover 601 to move upward, the transmission gear 620 will engage with the second rack 9, and drive the transmission gear 620 to rotate, thereby further accelerating the upward movement of the first rack 619, the connecting arm 618, the moving block 610, the drilling and milling motor 611 and the transmission shaft 612. At this time, the first spring telescopic rod 617 will gradually contract, and the second spring telescopic rod 7 remains unchanged. When the first spring telescopic rod 617 is completely contracted, the second spring telescopic rod 7 will gradually contract under the continuous upward movement of the cover 601 driven by the cylinder 5. In the process of the continuous upward movement of the cover 601, the driven gear 622 will be in contact with and engaged with the third rack 11. When the second spring telescopic rod 7 is in a natural state, the height of the second rack 9 is lower than that of the third rack 11. When the first spring telescopic rod 617 is completely contracted, that is, the transmission shaft 612 moves out of the sleeve 605, the driven gear 622 will be in contact with the third rack 11. Under the engagement of the third rack 11, the driven gear 622 will rotate clockwise when moving upward, thereby driving the first pawl 624 to revolve clockwise around the axis of the rotating shaft 621. Under the pushing of the first pawl 624, the first ratchet wheel 623 will rotate clockwise, thereby driving the rotating shaft 621, the second ratchet wheel 626 and the turntable 602 to rotate clockwise. In this process, the second pawl 627 will not block the rotation of the second ratchet wheel 626, so as to enable the turntable 602 to rotate smoothly, thereby realizing the replacement of the cutter 606. When the cylinder 5 drives the cover 601 and the driven gear 622 to move downward, the driven gear 622 will rotate counterclockwise at this time. The second ratchet wheel 626 cannot rotate counterclockwise under the limiting action of the second pawl 627, so the second ratchet wheel 626, the rotating shaft 621, the turntable 602 and the first ratchet wheel 623 remain unchanged in this process. When the first pawl 624 revolves counterclockwise around the axis of the rotating shaft 621, it will not engage with the first ratchet wheel 623, so even if the first ratchet wheel 623 remains unchanged, it will not affect the rotation of the first pawl 624.

[0045] As Figure 9As shown, the outer wall of the cover 601 is fixedly connected with a fixed block 629 at both ends of the rotating shaft 621, one end of the fixed block 629 is slidably connected with a sliding rod 630, one end of the sliding rod 630 is fixedly connected with a limiting block 631, the rotating shaft 621 is provided with four limiting grooves 632 matched with the limiting block 631 between the first ratchet wheel 623 and the second ratchet wheel 626; the sliding rod 630 is sleeved with a return spring 633 at one end of the limiting block 631, one end of the return spring 633 is fixedly connected with the limiting block 631, the other end of the return spring 633 is fixedly connected with the fixed block 629, one end of the sliding rod 630 away from the limiting block 631 is fixedly connected with a U-shaped frame 634, one end of the U-shaped frame 634 is rotatably connected with a roller 635, the bottom of the mounting block 4 is fixedly connected with a guide plate 12 above the U-shaped frame 634, the roller 635 is rollingly connected with the guide plate 12, and one end of the bottom of the guide plate 12 is provided with an inclined portion 1201 below the third rack 11.

[0046] Specifically, in the initial state, the limiting block 631 is clamped in the limiting groove 632, so that the rotating shaft 621 and the turntable 602 cannot rotate, thereby ensuring the stability of the tool 606 during drilling and milling. When the tool 606 needs to be replaced, the cover 601 needs to be driven upward by the cylinder 5, so as to drive the sliding rod 630, the U-shaped frame 634 and the roller 635 to move upward together. Before the driven gear 622 engages with the third rack 11, the roller 635 will contact the guide plate 12. When the roller 635 rolls to the inclined portion 1201 of the guide plate 12, the distance between the two rollers 635 will gradually increase, thereby driving the sliding rod 630 and the limiting block 631 to move, so that the limiting block 631 is separated from the limiting groove 632, so that the rotating shaft 621 and the turntable 602 can rotate smoothly. In this process, the return spring 633 will contract. When the tool 606 is replaced, the cover 601, the sliding rod 630, the limiting block 631 and the roller 635 need to be driven downward by the cylinder 5. When the roller 635 rolls to the inclined portion 1201 again, the return spring 633 will gradually rebound and push the limiting block 631 to move, so that the limiting block 631 can be clamped into the limiting groove 632 again, thereby fixing the rotating shaft 621 and the turntable 602.

[0047] Working principle: in the use process, when the tool 606 needs to be replaced, at this time the cover 601 needs to be driven upward by the air cylinder 5, so as to drive the first spring telescopic rod 617, the drilling and milling motor 611, the connecting arm 618, the first rack 619 and the transmission gear 620 to move upward together. In the process of upward movement of the transmission gear 620, it will contact and engage with the second rack 9. At this time, under the continuous driving of the air cylinder 5, the transmission gear 620 will rotate in the process of upward movement, so as to further speed up the upward movement speed of the first rack 619, the connecting arm 618, the moving block 610, the drilling and milling motor 611 and the transmission shaft 612. At this time, the first spring telescopic rod 617 will gradually contract. In this process, the form of the second spring telescopic rod 7 remains unchanged. After the speed of the moving block 610 moving upward is accelerated, the moving block 610 will gradually move from the bottom of the through slot 609 to the top of the through slot 609. In addition, after the speed of the transmission shaft 612 moving upward is accelerated, it will gradually move out of the sleeve 605, until it is completely moved above the sleeve 605, so as to facilitate the replacement of the subsequent tool 606.

[0048] In the process of upward movement of the cover 601, the slide rod 630, the U-shaped frame 634 and the roller 635 will move upward together. In this process, the roller 635 will contact the guide plate 12. When the roller 635 rolls to the inclined part 1201 of the guide plate 12, the distance between the two rollers 635 will gradually increase, so as to drive the slide rod 630 and the limiting block 631 to move, so that the limiting block 631 is separated from the limiting slot 632, so as to facilitate the smooth rotation of the rotating shaft 621 and the turntable 602. In this process, the return spring 633 will contract. In addition, when the first spring telescopic rod 617 is completely contracted, at this time, under the action of the continuous upward movement of the cover 601 driven by the air cylinder 5, the second spring telescopic rod 7 will gradually contract. In the process of continuous upward movement of the cover 601, the driven gear 622 will contact and engage with the third rack 11. Under the meshing action of the third rack 11, the driven gear 622 will rotate clockwise when moving upward, so as to drive the first pawl 624 to revolve clockwise around the axis of the rotating shaft 621. Under the pushing of the first pawl 624, the first ratchet wheel 623 will rotate clockwise, further driving the rotating shaft 621, the second ratchet wheel 626 and the turntable 602 to rotate clockwise. In this process, the second pawl 627 will not block the rotation of the second ratchet wheel 626, so as to facilitate the smooth rotation of the turntable 602.

[0049] When the rotating disc 602 rotates, the four sliding blocks 603 will rotate, and in this process, the sliding pin 608 at one end of the sliding block 603 will move along the path groove 607. The upper half of the path groove 607 is in the shape of a semicircle and is concentric with the rotating disc 602. The lower half of the path groove 607 is tapered. When the sliding pin 608 gradually moves to the tapered part of the path groove 607, it will cause the sliding block 603 to slide on the rotating disc 602, so that the sliding block 603 and the cutter 606 gradually move away from the center of the rotating disc 602. When the sliding pin 608 moves to the bottom of the tapered part of the path groove 607, the cutter 606 is in a vertically downward state and completely extends out of the cover 601. When the sliding pin 608 gradually moves from the tapered part of the path groove 607 to the semicircular part, the sliding block 603 and the cutter 606 will gradually move towards the rotating disc 602. In this way, the cutter 606 can be stored in the cover 601. By driving the rotating disc 602 to rotate, the cutter 606 can be replaced smoothly.

[0050] When the cutter 606 is replaced, the cover 601 and the driven gear 622 need to be driven downward by the air cylinder 5. At this time, the driven gear 622 will rotate counterclockwise, and the second ratchet wheel 626 cannot rotate counterclockwise due to the limiting action of the second pawl 627. Therefore, the second ratchet wheel 626, the rotating shaft 621, the rotating disc 602 and the first ratchet wheel 623 remain stationary in this process. When the first pawl 624 rotates counterclockwise around the axis of the rotating shaft 621, it will not engage with the first ratchet wheel 623. Therefore, even if the first ratchet wheel 623 remains stationary, it will not affect the rotation of the first pawl 624. In addition, during the downward movement of the cover 601 driven by the air cylinder 5, the first spring telescopic rod 617, the drilling and milling motor 611, the connecting arm 618, the first rack 619 and the transmission gear 620 will move downward together. Under the action of the transmission gear 620, the first rack 619, the connecting arm 618, the moving block 610, the drilling and milling motor 611 and the transmission shaft 612 move downward at a speed faster than the cover 601, the rotating disc 602 and the sleeve 605. In this way, the transmission shaft 612 can be reinserted into the sleeve 605, so that the subsequent drilling and milling motor 611 can smoothly drive the cutter 606 to rotate. In addition, when the cover 601 moves downward, the sliding rod 630, the limiting block 631 and the roller 635 will move downward. When the roller 635 rolls to the inclined part 1201 again, the return spring 633 will gradually rebound and push the limiting block 631 to move, so that the limiting block 631 can be reinserted into the limiting groove 632, thereby fixing the rotating shaft 621 and the rotating disc 602, so as to improve the stability of the cutter 606 during processing.

[0051] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since numerous changes can be made to the embodiments and variations can be possible without departing from the spirit and scope of the application as defined by the appended claims and their equivalents.

Claims

1. A high-speed numerical control drilling and milling combined machine tool, comprising a worktable (1), a support frame (2) fixedly connected to the top of the worktable (1), a moving frame (3) slidingly connected to the top of the support frame (2), a mounting block (4) slidingly connected to the top of the moving frame (3), an air cylinder (5) fixedly connected to the middle of the mounting block (4), and a drilling and milling mechanism (6) arranged at the output end of the air cylinder (5); characterized in that, Also includes: The drill milling mechanism (6) includes cover (601), rotating disc (602) and slider (603), the cover (601) is fixedly connected at the output end of cylinder (5), the inner wall one end of cover (601) is rotatably connected with rotating disc (602), the one side of rotating disc (602) is slidably connected with four sliders (603), one end of slider (603) is fixedly connected with protruding block (604), one end of protruding block (604) is rotatably connected with sleeve (605), the sleeve (605) is fixedly connected with cutter (606) away from the center of rotating disc (602), one end of cover (601) is provided with path slot (607), one end of protruding block (604) is fixedly connected with sliding pin (608), the sliding pin (608) is slidably connected with path slot (607); the upper half of path slot (607) is in the shape of a semicircle, and is concentric with rotating disc (602), the lower half of path slot (607) is tapered; The side wall of cover (601) is provided with through slot (609) inside path slot (607), one end of through slot (609) is slidably connected with moving block (610), one end of moving block (610) inside cover (601) is fixedly connected with drill milling motor (611), the output end of drill milling motor (611) is fixedly connected with transmission shaft (612), the transmission shaft (612) is slidably connected with sleeve (605), the side wall of transmission shaft (612) is provided with a plurality of spline grooves (613), the inner wall of sleeve (605) is fixedly connected with a plurality of spline blocks (614) matched with spline grooves (613); The outer wall of cover (601) is fixedly connected with first spring telescopic rod (617) above through slot (609), the bottom of first spring telescopic rod (617) is fixedly connected with moving block (610), the two ends of moving block (610) are respectively fixedly connected with connecting arm (618), the top of connecting arm (618) is fixedly connected with first rack (619), the outer wall of cover (601) is rotatably connected with two transmission gears (620) between two first racks (619), two transmission gears (620) are respectively meshed with two first racks (619), one end of the bottom of mounting block (4) is fixedly connected with second spring telescopic rod (7), the bottom of second spring telescopic rod (7) is fixedly connected with connecting frame (8), the bottom of connecting frame (8) is fixedly connected with second rack (9) matched with transmission gear (620) at both ends, two second racks (9) are both located between two transmission gears (620). One end of the rotating disc (602) is fixedly connected with a rotating shaft (621), the rotating shaft (621) is rotationally connected with the cover (601), one end of the rotating shaft (621) extends to the outside of the cover (601), and a driven gear (622) is rotationally connected with the rotating shaft (621), one end of the mounting block (4) is fixedly connected with a support arm (10), and the bottom of the support arm (10) is fixedly connected with a third rack (11) matched with the driven gear (622). One end of the rotating shaft (621) is fixedly connected with a first ratchet wheel (623), one end of the side wall of the driven gear (622) is rotationally connected with a first ratchet claw (624), the first ratchet claw (624) is in meshing connection with the first ratchet wheel (623), one end of the first ratchet claw (624) is provided with a first tension spring (625), and the other end of the first tension spring (625) is mounted at one end of the driven gear (622).

2. The high-speed CNC drilling and milling combined machine tool according to claim 1, characterized in that: The bottom of the spline groove (613) is provided with a horn-shaped opening (615), and the top of the spline block (614) is fixedly connected with a tapered head (616).

3. The high speed CNC drilling and milling combined machine tool according to claim 1, characterized in that: One end of the rotating shaft (621) away from the first ratchet wheel (623) is fixedly connected with a second ratchet wheel (626), the second ratchet wheel (626) is located outside the cover (601), the direction of the teeth of the second ratchet wheel (626) is consistent with the direction of the teeth of the first ratchet wheel (623), one end of the outer wall of the cover (601) is rotationally connected with a second ratchet claw (627), the second ratchet claw (627) is in meshing connection with the second ratchet wheel (626), one end of the second ratchet claw (627) is provided with a second tension spring (628), and the other end of the second tension spring (628) is mounted at one end of the cover (601).

4. The high speed CNC drilling and milling combined machine tool according to claim 3, characterized in that: The outer wall of the cover (601) is fixedly connected with a fixed block (629) at both ends of the rotating shaft (621), one end of the fixed block (629) is slidably connected with a sliding rod (630), the sliding rod (630) is fixedly connected with a limiting block (631) at one end of the rotating shaft (621), and four limiting grooves (632) matched with the limiting block (631) are arranged between the first ratchet wheel (623) and the second ratchet wheel (626) of the rotating shaft (621).

5. The high speed CNC drilling and milling combined machine tool according to claim 4, characterized in that: One end of the sliding rod (630) is sleeved with a reset spring (633), one end of the reset spring (633) is fixedly connected with the limiting block (631), the other end of the reset spring (633) is fixedly connected with the fixed block (629), one end of the sliding rod (630) away from the limiting block (631) is fixedly connected with a U-shaped frame (634), one end of the U-shaped frame (634) is rotationally connected with a roller (635), the bottom of the mounting block (4) is fixedly connected with a guide plate (12) directly above the U-shaped frame (634), the roller (635) is in rolling connection with the guide plate (12), one end of the bottom of the guide plate (12) is provided with an inclined portion (1201), and the inclined portion (1201) is located below the third rack (11).

6. The high speed CNC drilling and milling combined machine tool according to claim 5, characterized in that: The support frame (2) top two ends are respectively fixedly connected with first motor (13), the first motor (13) output end is fixedly connected with first lead screw (14), the first lead screw (14) is threadedly connected with moving frame (3), the first lead screw (14) is away from first motor (13) one end and is rotatably connected with support frame (2), the moving frame (3) top one end is fixedly connected with two second motor (15), the second motor (15) output end is fixedly connected with second lead screw (16), two the second lead screw (16) is located at the two ends of cylinder (5) respectively, the second lead screw (16) is threadedly connected with mounting block (4), the second lead screw (16) is away from second motor (15) one end and is rotatably connected with moving frame (3).

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