A CNC gantry milling machine for CNC machining center

Abstract

The present invention relates to the technical field of milling machines, and in particular to a CNC gantry milling machine for a CNC machining center, comprising: a base, the outer side of the base is fixedly connected to a gantry, the top of the base is rotatably connected to a Y-axis lead screw, and the outer side of the gantry is rotatably connected to an X-axis lead screw; a fixing device, the fixing device is used to fix a workpiece to be processed, the bottom of the fixing device is slidably connected to the top of the base through a guide rail. The present invention places the workpiece on the surface of the base by setting a fixing device, at which time the workpiece is just pressed on the surface of the adsorption component, and the adsorption component not contacted by the workpiece maintains its original state, thereby forming a closed space between the workpiece and the base, and when the air pump in the blowing component draws air, a negative pressure state is formed in the base, thereby adsorbing the workpiece on the surface of the base, thereby fixing the workpiece without contacting the side wall of the workpiece, preventing the fixing device from interfering with the cutting process of the milling cutter.

Description

Technical Field

[0001] The present invention relates to the technical field of milling machines, in particular to a numerically controlled gantry milling machine for a numerically controlled machining center. Background Art

[0002] A gantry milling machine is a large machine tool with a gantry-shaped frame. Its worktable and milling head move along guide rails, enabling the machining of large, complex workpieces. Widely used in machinery manufacturing and mold processing, it offers high precision, efficiency, and stability, meeting a wide range of high-precision machining needs.

[0003] In CNC machining, traditional fixing methods often require contact with the sidewalls of the workpiece, such as using a fixture to directly clamp the workpiece. However, this contact-based fixing method has numerous drawbacks. For one thing, fixtures and other contact-based fixing devices can occupy a certain amount of machining space, interfering with the milling cutter's cutting progress, thereby affecting machining accuracy and efficiency. When machining complex workpieces, fixtures can even prevent the milling cutter from reaching specific machining areas, preventing the intended machining task from being completed. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention solves the technical problems thereof by adopting the following technical solutions: a CNC gantry milling machine for a CNC machining center, comprising: a base, the outer side of the base is fixedly connected to a gantry, the top of the base is rotatably connected to a Y-axis screw rod, and the outer side of the gantry is rotatably connected to an X-axis screw rod; a fixing device, the fixing device being used to fix a workpiece to be machined, the bottom of the fixing device being slidably connected to the top of the base through a guide rail, the bottom of the fixing device being threadedly connected to the outer wall of the Y-axis screw rod; a displacement device, the displacement device being located at the top of the fixing device, the outer side of the displacement device being slidably connected to the top of the gantry, the inner side of the displacement device being threadedly connected to the outer wall of the X-axis screw rod, fixing the workpiece on the surface of the fixing device, and then driving the Y-axis screw rod to rotate by a motor on the top of the base, so that the fixing device can be moved along the X-axis direction, and then driving the X-axis screw rod to rotate by a motor installed on the top of the gantry, so that the displacement device can be moved along the Y-axis direction;

[0005] The displacement device includes a movable frame, an inner side of the movable frame is fixedly connected to a telescopic cylinder, the bottom end of the telescopic cylinder is fixedly connected to a mounting plate, the top of the mounting plate is fixedly connected to a guide rod, the top of the mounting plate is fixedly connected to a drive motor, the bottom of the mounting plate is rotatably connected to a tool holder, a milling cutter is movably mounted on the bottom of the tool holder, and a cooling device is fixedly connected to the outer side of the movable frame. When the telescopic cylinder is extended, the mounting plate can be moved to a side away from the movable frame under the guidance of the guide rod. At this time, the drive motor, the tool holder and the milling cutter fixed to the mounting plate move together along the Z-axis direction;

[0006] The fixing device includes a base, a threaded sleeve is fixedly connected to the bottom of the base, cleaning components are fixedly connected to both sides of the threaded sleeve, sliders are fixedly connected to both sides of the bottom of the base, blowing components are fixedly connected to both sides of the inner wall of the base, and adsorption components are fixedly connected to the inner wall of the base, and the adsorption components are linearly arranged along the central axis of the base. When the Y-axis screw rotates, the threaded sleeve drives the base to move as the Y-axis screw rotates.

[0007] Preferably, the outer side of the movable frame is slidably connected to the outer wall of the gantry frame, the inner wall of the movable frame is threadedly connected to the outer wall of the X-axis screw rod, the outer wall of the guide rod is slidably connected to the inner wall of the movable frame, and the output end of the drive motor is fixedly connected to the top of the tool holder. The drive motor drives the milling cutter installed on the tool holder to rotate to process the workpiece fixed on the surface of the fixing device.

[0008] Preferably, the cooling device includes a cooling water tank, the bottom of the cooling water tank is fixedly connected to a connecting pipe, the end of the connecting pipe away from the cooling water tank is fixedly connected to a telescopic pipe, the bottom end of the telescopic pipe is fixedly connected to a spray pipe, the bottom of the spray pipe is fixedly connected to a material blocking assembly, the outer side of the cooling water tank is fixedly connected to the outer side of the movable rack, the outer side of the movable rack is fixedly connected to the outer wall of the telescopic pipe, the bottom of the mounting plate is fixedly connected to the top of the material blocking assembly, and the boosting valve installed at the bottom of the cooling water tank is opened to allow the cooling water in the cooling water tank to flow into the telescopic pipe through the connecting pipe, and then flow into the spray pipe through the telescopic pipe to be sprayed out.

[0009] Preferably, the material blocking assembly includes a fixing ring, the bottom of the fixing ring is fixedly connected to a limiting rod, the bottom of the limiting rod is slidably connected to a shielding shell, the bottom of the shielding shell is slidably connected to a ball, the top of the shielding shell is fixedly connected to a compression spring, the top of the compression spring is fixedly connected to the bottom of the fixing ring, the top of the fixing ring is fixedly connected to the bottom of the mounting plate, the inner side of the slider is slidably connected to the top of the base, the inner side of the threaded sleeve is threadedly connected to the outer wall of the Y-axis screw rod, the outer wall of the Y-axis screw rod is slidably connected to the inner side of the cleaning assembly, the shielding shell can block the cooling water sprayed from the injection pipe, and at the same time block most of the waste material generated during milling cutter cutting, and reduce the friction resistance when the shielding shell contacts the workpiece by arranging the ball.

[0010] Preferably, the cleaning assembly includes a mounting ring, the outer wall of the mounting ring is fixedly connected to an air spring, the outer side of the air spring is fixedly connected to a limiting ring, the outer wall of the mounting ring is fixedly connected to an elastic rod, the outer side of the elastic rod is fixedly connected to a rubber block, the outer wall of the mounting ring is fixedly connected to a connecting rod, the outer wall of the connecting rod is fixedly connected to a supporting ring, the outer wall of the mounting ring is fixedly connected to the outer wall of the threaded sleeve, the outer side of the rubber block is slidingly connected to the outer wall of the Y-axis screw rod, and the air spring is provided to ensure that the limiting ring always maintains a tendency to approach the mounting ring. At this time, under the extrusion of the limiting ring, the rubber block fixed on the elastic rod can always maintain contact with the surface of the Y-axis screw rod and clean its surface when the Y-axis screw rod rotates.

[0011] Preferably, the blowing assembly includes an air inlet cylinder, both sides of the air inlet cylinder are fixedly connected to an air pump, the inner side of the air inlet cylinder is fixedly connected to an air guide component, the outer side of the air inlet cylinder is fixedly connected to an air blowing pipe, the top of the air blowing pipe is fixedly connected to a diversion air guide pipe, the top of the air blowing pipe is fixedly connected to a branch pipe, the top of the branch pipe is fixedly connected to a diversion jet pipe, the outer wall of the air inlet cylinder is fixedly connected to the inner wall of the base, and the outer walls of the diversion jet pipe and the diversion air guide pipe are fixed to the outer wall of the base The wall of the air inlet cylinder is provided with an air extraction hole. When the air pump blows air, the air enters the diverter air duct through the air blowing pipe. At this time, when the slider slides along the top of the base, the gas blown out from the diverter air duct can blow away the debris that has fallen on the surface of the base, thereby assisting the staff in the cleaning process. Part of the ventilation that enters the air blowing pipe enters the diverter air jet pipe through the branch pipe. When the air is ejected from the diverter air jet pipe, the surface of the base can be cleaned and the debris that has fallen on the surface of the base can be blown away.

[0012] The air intake duct is fixedly connected to the air intake pipe by the air pump, and the air intake duct is fixedly connected to the air intake pipe by the air pump, so that the air intake duct can be connected to the outlet port of the air intake pipe by the air pump.

[0013] Preferably, the adsorption assembly includes a fixed sleeve, the inner side of the fixed sleeve is slidably connected to an ejection sleeve, the bottom of the ejection sleeve is fixedly connected to a return spring, the bottom end of the return spring is fixedly connected to a base plate, the top of the base plate is fixedly connected to an insertion rod, and the bottom of the insertion rod is fixedly slidably connected to a retaining ring. The workpiece is placed on the surface of the base, and the workpiece is just pressed on the surface of the adsorption assembly. At this time, the ejection sleeve is retracted into the fixed sleeve under the action of the gravity of the workpiece, and the retaining ring slides downward and is staggered with the hole opened in the side wall of the fixed sleeve.

[0014] Preferably, the outer wall of the fixed sleeve is fixedly connected to the inner wall of the base, the bottom of the bottom plate is fixedly connected to the bottom of the inner wall of the base, the outer wall of the baffle ring is slidably connected to the inner wall of the fixed sleeve, and the bottom of the baffle ring is fixedly connected to the outer wall of the ejection sleeve. When the air pump in the blowing assembly draws air, the air in the base can be sucked into the air inlet tube through the exhaust hole, and a negative pressure state is formed in the base.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The present invention sets a cooling device, and the boost valve installed at the bottom of the cooling water tank is opened, so that the cooling water in the cooling water tank flows into the telescopic pipe through the connecting pipe, and then flows into the injection pipe through the telescopic pipe to be sprayed out. The telescopic pipe can be synchronously extended and retracted with the movement of the mounting plate, so that the cooling water can be sprayed out normally when the milling cutter moves. At the same time, a material blocking assembly is set to block the sprayed cooling water, which can prevent the cooling water from splashing too widely when it is sprayed.

[0017] 2. The present invention provides a material blocking assembly. When the material blocking assembly is in use, the shielding shell can block the cooling water sprayed from the injection pipe, and at the same time block most of the waste materials generated when the milling cutter is cutting. The friction resistance when the shielding shell contacts the workpiece is reduced by providing a ball. When the milling cutter moves downward and the ball contacts the workpiece, the shielding shell can slide upward along the limit rod at the bottom of the fixed ring and force the compression spring to be compressed, thereby avoiding the shielding shell interfering with the cutting work of the milling cutter.

[0018] 3. The present invention places the workpiece on the surface of the base by setting a fixing device. At this time, the workpiece is just pressed on the surface of the adsorption component. At this time, the ejector sleeve is retracted into the fixed sleeve under the action of the gravity of the workpiece. At this time, the retaining ring slides downward and is staggered with the hole opened in the side wall of the fixed sleeve, while the adsorption component that is not in contact with the workpiece maintains its original state, thereby forming a closed space between the workpiece and the base. When the air pump in the blowing component is pumping air, a negative pressure state is formed in the base, and the workpiece is adsorbed on the surface of the base. Therefore, the workpiece can be fixed without contacting the side wall of the workpiece, thereby preventing the fixing device from interfering with the cutting process of the milling cutter.

[0019] 4. The present invention provides an air guide component. After the workpiece is processed, the air pump blows air. At this time, the reset spring drives the ejection sleeve to reset, so that the gas entering the base cannot be blown out through the adsorption component. At this time, as the air pressure component in the air inlet tube increases, the baffle in the air guide component slides along the surface of the fixed rod under the push of the air flow and approaches the positioning ring. At this time, the coil spring is compressed, and the baffle is just offset from the opening of the blowing pipe, so that air can enter the diversion air guide pipe through the blowing pipe.

[0020] 5. The present invention provides an air blowing assembly. When the air pump blows air, the air enters the diversion air duct through the air blowing pipe. At this time, when the slider slides along the top of the base, the gas blown out from the diversion air duct can blow away the debris that falls on the surface of the base, thereby assisting the staff in the cleaning process.

[0021] 6. The present invention provides an air blowing assembly, so that part of the ventilation air entering the air blowing pipe enters the branch jet pipe through the branch jet pipe. When the air is ejected from the branch jet pipe, the surface of the base can be cleaned and the debris dropped on the surface of the base can be blown away. In this way, the surface of the base can be cleaned, making the maintenance process of the milling machine more convenient for the staff.

[0022] 7. The present invention provides a cleaning component and an air spring to ensure that the limit ring always maintains a tendency to approach the mounting ring. At this time, under the extrusion of the limit ring, the rubber block fixed on the elastic rod can always maintain contact with the surface of the Y-axis screw rod and clean its surface when the Y-axis screw rod rotates, thereby preventing the Y-axis screw rod from getting stuck when sliding relative to the threaded sleeve.

[0023] 8. The present invention provides a cleaning assembly and fixes the support ring by providing a connecting rod. The support ring can limit the maximum deformation of the elastic rod, thereby preventing the elastic rod from being squeezed by the limit ring, causing the rubber block and the Y-axis screw to squeeze each other too much, resulting in greater wear of the rubber block during use, thereby extending the service life of the rubber block. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front view of the present invention;

[0025] Figure 2 It is a schematic structural diagram of the displacement device of the present invention;

[0026] Figure 3 It is a schematic structural diagram of the cooling device of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the material blocking assembly of the present invention;

[0028] Figure 5 It is a structural schematic diagram of the fixing device of the present invention;

[0029] Figure 6 is a structural schematic diagram of the fixing device of the present invention from another perspective;

[0030] Figure 7 It is a schematic structural diagram of the cleaning assembly of the present invention;

[0031] Figure 8 It is a structural schematic diagram of the blowing assembly of the present invention;

[0032] Figure 9 It is a structural schematic diagram of the air guide component of the present invention;

[0033] Figure 10 It is a structural schematic diagram of the adsorption component of the present invention.

[0034] In the figure: 1. base; 2. gantry; 3. Y-axis screw; 4. X-axis screw; 5. fixing device; 6. displacement device; 61. moving frame; 62. guide rod; 63. mounting plate; 64. telescopic cylinder; 65. driving motor; 66. tool holder; 67. milling cutter; 68. cooling device; 681. cooling water tank; 682. connecting pipe; 683. telescopic pipe; 684. injection pipe; 685. material blocking assembly; 851. fixing ring; 852. limiting rod; 853. compression spring; 854. shielding shell; 855. ball bearing; 51. base; 52. slider; 53. threaded sleeve; 54. cleaning assembly; 55. blowing assembly; 5 6. Adsorption assembly; 541. Mounting ring; 542. Air spring; 543. Limiting ring; 544. Elastic rod; 545. Rubber block; 546. Connecting rod; 547. Support ring; 551. Air inlet tube; 552. Air pump; 553. Air exhaust hole; 554. Air guide component; 555. Air blow pipe; 556. Diverter air pipe; 557. Branch pipe; 558. Diverter jet pipe; 401. Positioning ring; 402. Fixing rod; 403. Limiting block; 404. Coil spring; 405. Flow blocking block; 561. Fixing sleeve; 562. Ejection sleeve; 563. Return spring; 564. Bottom plate; 565. Insert rod; 566. Retaining ring. DETAILED DESCRIPTION

[0035] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are chosen and described to better illustrate the principles of the invention and its practical application, and to enable those skilled in the art to understand the invention and design various embodiments with various modifications suitable for specific applications.

[0036] Example: See Figure 1 - Figure 10The present invention provides a technical solution: a CNC gantry milling machine for a CNC machining center, comprising:

[0037] Base 1, the outer side of the base 1 is fixedly connected to the gantry 2, the top of the base 1 is rotatably connected to the Y-axis screw rod 3, and the outer side of the gantry 2 is rotatably connected to the X-axis screw rod 4; a fixing device 5, the fixing device 5 is used to fix the workpiece to be processed, the bottom of the fixing device 5 is slidably connected to the top of the base 1 through a guide rail, and the bottom of the fixing device 5 is threadedly connected to the outer wall of the Y-axis screw rod 3; a displacement device 6, the displacement device 6 is located at the top of the fixing device 5, the outer side of the displacement device 6 is slidably connected to the top of the gantry 2, and the inner side of the displacement device 6 is threadedly connected to the outer wall of the X-axis screw rod 4, fixing the workpiece on the surface of the fixing device 5, and then driving the Y-axis screw rod 3 to rotate by the motor on the top of the base 1, so that the fixing device 5 can be moved along the X-axis direction, and then driving the X-axis screw rod 4 to rotate by the motor installed on the top of the gantry 2, so that the displacement device 6 can be moved along the Y-axis direction;

[0038] The displacement device 6 includes a moving frame 61, the inner side of the moving frame 61 is fixedly connected to a telescopic cylinder 64, the bottom end of the telescopic cylinder 64 is fixedly connected to a mounting plate 63, the top of the mounting plate 63 is fixedly connected to a guide rod 62, the top of the mounting plate 63 is fixedly connected to a drive motor 65, the bottom of the mounting plate 63 is rotatably connected to a tool holder 66, the bottom of the tool holder 66 is movably installed with a milling cutter 67, the outer side of the moving frame 61 is fixedly connected to a cooling device 68, the outer side of the moving frame 61 is slidably connected to the outer wall of the gantry 2, the inner wall of the moving frame 61 is threadedly connected to the outer wall of the X-axis screw rod 4, and the guide rod 62 is fixedly connected to the outer wall of the X-axis screw rod 4. The outer wall of the movable frame 61 is slidably connected to the inner wall of the movable frame 61, and the output end of the driving motor 65 is fixedly connected to the top of the tool holder 66. When the telescopic cylinder 64 is extended, the mounting plate 63 can be moved to the side away from the movable frame 61 under the guidance of the guide rod 62. At this time, the driving motor 65, the tool holder 66 and the milling cutter 67 fixed on the mounting plate 63 move together along the Z-axis direction, thereby enabling the driving motor 65 to drive the milling cutter 67 mounted on the tool holder 66 to rotate, thereby processing the workpiece fixed on the surface of the fixing device 5. During this process, the cooling device 68 can cool the milling cutter 67 with water;

[0039] The fixing device 5 includes a base 51, the bottom of the base 51 is fixedly connected with a threaded sleeve 53, and cleaning components 54 are fixedly connected on both sides of the threaded sleeve 53. Sliders 52 are fixedly connected on both sides of the bottom of the base 51, and blowing components 55 are fixedly connected on both sides of the inner wall of the base 51. The inner wall of the base 51 is fixedly connected with an adsorption component 56, and the adsorption component 56 is linearly arranged along the central axis of the base 51. The inner side of the slider 52 is slidably connected to the top of the base 1, and the inner side of the threaded sleeve 53 is threadedly connected to the outer wall of the Y-axis screw rod 3. The outer wall of the Y-axis screw rod 3 is slidably connected to the inner side of the cleaning component 54. When fixing the workpiece, the workpiece is placed on the surface of the base 51. At this time, the workpiece is just pressed on the surface of the adsorption component 56. When the Y-axis screw rod 3 rotates, the threaded sleeve 53 drives the base 51 to move as the Y-axis screw rod 3 rotates.

[0040] The cooling device 68 includes a cooling water tank 681, a connecting pipe 682 is fixedly connected to the bottom of the cooling water tank 681, a telescopic pipe 683 is fixedly connected to the end of the connecting pipe 682 away from the cooling water tank 681, a spray pipe 684 is fixedly connected to the bottom of the telescopic pipe 683, a material blocking assembly 685 is fixedly connected to the bottom of the spray pipe 684, the outer side of the cooling water tank 681 is fixedly connected to the outer side of the mobile frame 61, the outer side of the mobile frame 61 is fixedly connected to the outer wall of the telescopic pipe 683, and the bottom of the mounting plate 63 is fixedly connected to the material blocking assembly 685. The top of the cooling water tank 681 is fixedly connected. When the temperature drops, the boost valve installed at the bottom of the cooling water tank 681 opens, so that the cooling water in the cooling water tank 681 flows into the telescopic tube 683 through the connecting pipe 682, and then flows to the injection pipe 684 through the telescopic tube 683 to be sprayed out. The telescopic tube 683 can be synchronously extended and retracted with the movement of the mounting plate 63, so that the cooling water can be sprayed out normally when the milling cutter 67 moves. At the same time, a material blocking assembly 685 is provided to block the sprayed cooling water to prevent the cooling water from splashing too widely when spraying.

[0041] The blocking assembly 685 includes a fixing ring 851, the bottom of the fixing ring 851 is fixedly connected to the limiting rod 852, the bottom of the limiting rod 852 is slidably connected to the shielding shell 854, the bottom of the shielding shell 854 is slidably connected to the ball 855, the top of the shielding shell 854 is fixedly connected to the compression spring 853, the top of the compression spring 853 is fixedly connected to the bottom of the fixing ring 851, the top of the fixing ring 851 is fixedly connected to the bottom of the mounting plate 63, and when the blocking assembly 685 is in use, the shielding shell 854 is fixedly connected to the limiting rod 852. 54 can block the cooling water sprayed from the injection pipe 684, and at the same time block most of the waste generated by the milling cutter 67 during cutting, and reduce the friction resistance when the shielding shell 854 contacts the workpiece by setting the ball 855. When the milling cutter 67 moves downward and the ball 855 contacts the workpiece, the shielding shell 854 can slide upward along the limiting rod 852 at the bottom of the fixing ring 851 and force the compression spring 853 to be compressed, thereby preventing the shielding shell 854 from interfering with the cutting work of the milling cutter 67.

[0042] The cleaning assembly 54 includes a mounting ring 541, the outer wall of the mounting ring 541 is fixedly connected to an air spring 542, the outer side of the air spring 542 is fixedly connected to a limit ring 543, the outer wall of the mounting ring 541 is fixedly connected to an elastic rod 544, the outer side of the elastic rod 544 is fixedly connected to a rubber block 545, the outer wall of the mounting ring 541 is fixedly connected to a connecting rod 546, the outer wall of the connecting rod 546 is fixedly connected to a supporting ring 547, the outer wall of the mounting ring 541 is fixedly connected to the outer wall of the threaded sleeve 53, the outer side of the rubber block 545 is slidably connected to the outer wall of the Y-axis screw rod 3, when the Y-axis screw rod 3 rotates, the threaded sleeve 53 drives the base 51 to move as the Y-axis screw rod 3 rotates, and in this process, the cleaning assembly 54 can remove impurities attached to the surface of the Y-axis screw rod 3; In the embodiment, the air spring 542 is provided to ensure that the limiting ring 543 always keeps a tendency to approach the mounting ring 541. At this time, under the extrusion of the limiting ring 543, the rubber block 545 fixed on the elastic rod 544 can always keep in contact with the surface of the Y-axis screw rod 3 and clean its surface when the Y-axis screw rod 3 rotates, thereby preventing the Y-axis screw rod 3 from getting stuck when sliding relative to the threaded sleeve 53; at the same time, the supporting ring 547 is fixed by providing a connecting rod 546, and the supporting ring 547 can limit the maximum deformation of the elastic rod 544, thereby preventing the elastic rod 544 from being squeezed by the limiting ring 543, causing the rubber block 545 and the Y-axis screw rod 3 to squeeze each other too much, resulting in greater wear of the rubber block 545 during use, thereby extending the service life of the rubber block 545.

[0043] The blowing assembly 55 includes an air inlet cylinder 551, and air pumps 552 are fixedly connected to both sides of the air inlet cylinder 551. An air guide component 554 is fixedly connected to the inner side of the air inlet cylinder 551, and an air blowing pipe 555 is fixedly connected to the outer side of the air inlet cylinder 551. The top of the air blowing pipe 555 is fixedly connected to a diversion air guide pipe 556. The top of the air blowing pipe 555 is fixedly connected to a branch pipe 557. The top of the branch pipe 557 is fixedly connected to a diversion jet pipe 558. The outer wall of the air inlet cylinder 551 is fixedly connected to the inner wall of the base 51, and the outer walls of the diversion jet pipe 558 and the diversion air guide pipe 556 are fixedly connected to the outer wall of the base 51. The air inlet 551 is fixedly connected, and an air extraction hole 553 is opened in the wall of the air inlet 551. The air guide component 554 includes a positioning ring 401. The inner side of the positioning ring 401 is fixedly connected to a fixing rod 402. Both ends of the fixing rod 402 are fixedly connected to a limiting block 403. Coil springs 404 are fixedly connected to both sides of the positioning ring 401. One end of the coil spring 404 away from the positioning ring 401 is fixedly connected to a baffle 405. The inner side of the baffle 405 is slidably connected to the outer wall of the fixing rod 402. The outer wall of the positioning ring 401 is fixedly connected to the inner wall of the air inlet 551. The inner wall of the air inlet 551 is fixedly connected to the baffle 403. 05 is slidably connected to the outer wall of the air pump 552. After the workpiece is processed, the air is blown by the air pump 552. At this time, the reset spring 563 drives the ejection sleeve 562 to reset, so that the gas entering the base 51 cannot be blown out through the adsorption component 56. At this time, as the air pressure component in the air inlet cylinder 551 increases, the baffle 405 in the air guide component 554 slides along the surface of the fixed rod 402 under the push of the air flow and approaches the positioning ring 401. At this time, the coil spring 404 is compressed, and the baffle 405 is just staggered with the opening of the air pipe 555, so that the air can enter the diversion guide through the air pipe 555. In the air pipe 556, when the slider 52 slides along the top of the base 1, the gas blown out from the diverter air pipe 556 can blow away the debris that has fallen on the surface of the base 51, thereby assisting the staff in the cleaning process. At the same time, part of the ventilation entering the air pipe 555 enters the diverter air jet pipe 558 through the branch pipe 557. When the air is ejected from the diverter air jet pipe 558, the surface of the base 51 can be cleaned and the debris that has fallen on the surface of the base 51 can be blown away. In this way, the surface of the base 51 can be cleaned, making it more convenient for the staff to maintain the milling machine.

[0044] The adsorption assembly 56 includes a fixed sleeve 561, the inner side of the fixed sleeve 561 is slidably connected to the ejection sleeve 562, the bottom of the ejection sleeve 562 is fixedly connected to the return spring 563, the bottom end of the return spring 563 is fixedly connected to the bottom plate 564, the top of the bottom plate 564 is fixedly connected to the insertion rod 565, the bottom of the insertion rod 565 is fixedly and slidably connected to the retaining ring 566, the outer wall of the fixed sleeve 561 is fixedly connected to the inner wall of the base 51, the bottom of the bottom plate 564 is fixedly connected to the bottom of the inner wall of the base 51, the outer wall of the retaining ring 566 is slidably connected to the inner wall of the fixed sleeve 561, and the bottom of the retaining ring 566 is fixedly connected to the outer wall of the ejection sleeve 562. When fixing the workpiece, the workpiece is placed on the surface of the base 51. At this time, the workpiece is just pressed on the surface of the adsorption assembly 56, and the ejection sleeve 562 is retracted and fixed under the action of the gravity of the workpiece. The retaining ring 566 and the ejection sleeve 562 are just offset from the holes in the side wall of the fixed sleeve 561, while the adsorption component 56 that is not in contact with the workpiece remains in its original state, thereby forming a closed space between the workpiece and the base 51. When the air pump 552 in the blowing component 55 is evacuated, the air in the base 51 can be sucked into the air inlet 551 through the exhaust hole 553. At this time, a negative pressure state is formed in the base 51, thereby adsorbing the workpiece on the surface of the base 51, thereby fixing the workpiece without contacting the side wall of the workpiece, preventing the fixing device 5 from interfering with the cutting process of the milling cutter 67 when fixing the workpiece.

[0045] Working principle: When in use, the workpiece is fixed on the surface of the fixing device 5, and then the Y-axis screw 3 is driven by the motor on the top of the base 1 to rotate, so that the fixing device 5 can be moved along the X-axis direction. Then, the X-axis screw 4 is driven by the motor installed on the top of the gantry 2 to rotate, so that the displacement device 6 can be moved along the Y-axis direction. When the telescopic cylinder 64 is extended, the mounting plate 63 can be moved to the side away from the movable frame 61 under the guidance of the guide rod 62. At this time, the driving motor 65, the tool holder 66 and the milling cutter 67 fixed on the mounting plate 63 move together along the Z-axis direction, thereby enabling the driving motor 65 to drive the milling cutter 67 installed on the tool holder 66 to rotate, and the workpiece fixed on the surface of the fixing device 5 is processed. During this process, the cooling device 68 can cool the milling cutter 67 with water.

[0046] When cooling, the boost valve installed at the bottom of the cooling water tank 681 is opened, allowing the cooling water in the cooling water tank 681 to flow into the telescopic pipe 683 through the connecting pipe 682, and then flow through the telescopic pipe 683 to the injection pipe 684 for injection. The telescopic pipe 683 can be synchronously extended and retracted with the movement of the mounting plate 63, so that the cooling water can be injected normally when the milling cutter 67 moves. At the same time, a material blocking assembly 685 is provided to block the injected cooling water to prevent the cooling water from splashing too widely when injected.

[0047] When the material blocking assembly 685 is in use, the shielding shell 854 can block the cooling water sprayed from the injection pipe 684, and at the same time block most of the waste generated by the milling cutter 67 during cutting. The ball bearing 855 is provided to reduce the friction resistance when the shielding shell 854 contacts the workpiece. When the milling cutter 67 moves downward and the ball bearing 855 contacts the workpiece, the shielding shell 854 can slide upward along the limiting rod 852 at the bottom of the fixing ring 851 and force the compression spring 853 to be compressed, thereby preventing the shielding shell 854 from interfering with the cutting work of the milling cutter 67.

[0048] When fixing the workpiece, the workpiece is placed on the surface of the base 51. At this time, the workpiece is just pressed against the surface of the adsorption assembly 56. At this time, the ejection sleeve 562 is retracted into the fixed sleeve 561 under the action of the gravity of the workpiece. At this time, the return spring 563 is compressed, and the retaining ring 566 slides downward with the ejection sleeve 562. The insertion rod 565 on the top of the bottom plate 564 can limit the retaining ring 566. At this time, the retaining ring 566 and the ejection sleeve 562 are just offset from the hole opened in the side wall of the fixed sleeve 561, and the adsorption assembly 56 that is not in contact with the workpiece maintains its original state, thereby forming a closed space between the workpiece and the base 51.

[0049] When the air pump 552 in the blowing assembly 55 is pumping air, the air in the base 51 is sucked into the air inlet 551 through the air extraction hole 553. At this time, a negative pressure state is formed in the base 51, thereby adsorbing the workpiece on the surface of the base 51. In this way, the workpiece can be fixed without contacting the side wall of the workpiece, preventing the fixing device 5 from interfering with the cutting process of the milling cutter 67 when fixing the workpiece.

[0050] The air in the air guide 554 is prevented from being blown out through the suction assembly 56 and the air pressure assembly 563 is increased. At this time, the air in the air inlet tube 551 increases, and the air in the air guide 554 slides along the surface of the fixed rod 402 under the push of the air flow and approaches the positioning ring 401. At this time, the coil spring 404 is compressed, and the air in the air guide 554 is just staggered with the opening of the air blowing pipe 555, so that the air can enter the diverter air guide 556 through the air blowing pipe 555. At this time, when the slider 52 slides along the top of the base 1, the air blown out from the diverter air guide 556 can blow away the debris that has fallen on the surface of the base 51, thereby assisting the staff in the cleaning process.

[0051] At the same time, part of the ventilation air entering the blowing pipe 555 enters the branch jet pipe 558 through the branch jet pipe 557. When the air is ejected from the branch jet pipe 558, it can clean the surface of the base 51 and blow away the debris that has fallen on the surface of the base 51. In this way, the surface of the base 51 can be cleaned, making the maintenance process of the milling machine more convenient for the staff.

[0052] When the Y-axis screw rod 3 rotates, the threaded sleeve 53 drives the base 51 to move as the Y-axis screw rod 3 rotates. During this process, the cleaning component 54 can remove impurities attached to the surface of the Y-axis screw rod 3. The air spring 542 is provided to ensure that the limiting ring 543 always tends to approach the mounting ring 541. At this time, under the pressure of the limiting ring 543, the rubber block 545 fixed on the elastic rod 544 can always maintain contact with the surface of the Y-axis screw rod 3 and clean its surface when the Y-axis screw rod 3 rotates, thereby preventing the Y-axis screw rod 3 from getting stuck when sliding relative to the threaded sleeve 53.

[0053] At the same time, the support ring 547 is fixed by setting a connecting rod 546. The support ring 547 can limit the maximum deformation of the elastic rod 544, preventing the elastic rod 544 from being squeezed by the limiting ring 543, causing the rubber block 545 and the Y-axis screw rod 3 to be squeezed too much, resulting in greater wear of the rubber block 545 during use, thereby extending the service life of the rubber block 545.

[0054] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative work should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention are implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A CNC gantry milling machine for a CNC machining center, characterized in that: include: A base (1), the outer side of the base (1) is fixedly connected to a gantry (2), the top of the base (1) is rotatably connected to a Y-axis screw rod (3), and the outer side of the gantry (2) is rotatably connected to an X-axis screw rod (4); A fixing device (5), the fixing device (5) is used to fix the workpiece to be processed, the bottom of the fixing device (5) is slidably connected to the top of the base (1) via a guide rail, and the bottom of the fixing device (5) is threadedly connected to the outer wall of the Y-axis screw rod (3); A displacement device (6), the displacement device (6) is located on the top of the fixing device (5), the outer side of the displacement device (6) is slidably connected to the top of the gantry (2), and the inner side of the displacement device (6) is threadedly connected to the outer wall of the X-axis screw rod (4); The displacement device (6) includes a movable frame (61), the inner side of the movable frame (61) is fixedly connected to a telescopic cylinder (64), the bottom end of the telescopic cylinder (64) is fixedly connected to a mounting plate (63), the top of the mounting plate (63) is fixedly connected to a guide rod (62), the top of the mounting plate (63) is fixedly connected to a drive motor (65), the bottom of the mounting plate (63) is rotatably connected to a tool holder (66), the bottom of the tool holder (66) is movably mounted with a milling cutter (67), and the outer side of the movable frame (61) is fixedly connected to a cooling device (68); The fixing device (5) comprises a base (51), a threaded sleeve (53) is fixedly connected to the bottom of the base (51), cleaning components (54) are fixedly connected to both sides of the threaded sleeve (53), sliders (52) are fixedly connected to both sides of the bottom of the base (51), blowing components (55) are fixedly connected to both sides of the inner wall of the base (51), and an adsorption component (56) is fixedly connected to the inner wall of the base (51), and the adsorption components (56) are linearly arranged along the central axis of the base (51); The cleaning assembly (54) comprises a mounting ring (541), an outer wall of the mounting ring (541) is fixedly connected to an air spring (542), an outer side of the air spring (542) is fixedly connected to a limit ring (543), an outer wall of the mounting ring (541) is fixedly connected to an elastic rod (544), an outer side of the elastic rod (544) is fixedly connected to a rubber block (545), an outer wall of the mounting ring (541) is fixedly connected to a connecting rod (546), an outer wall of the connecting rod (546) is fixedly connected to a supporting ring (547), an outer wall of the mounting ring (541) is fixedly connected to an outer wall of the threaded sleeve (53), and an outer side of the rubber block (545) is slidably connected to an outer wall of the Y-axis screw rod (3); The blowing assembly (55) includes an air inlet cylinder (551), air pumps (552) are fixedly connected to both sides of the air inlet cylinder (551), an air guide component (554) is fixedly connected to the inner side of the air inlet cylinder (551), an air blowing pipe (555) is fixedly connected to the outer side of the air inlet cylinder (551), a diversion air guide pipe (556) is fixedly connected to the top of the air blowing pipe (555), a branch pipe (557) is fixedly connected to the top of the air blowing pipe (555), a diversion jet pipe (558) is fixedly connected to the top of the branch pipe (557), an outer wall of the air inlet cylinder (551) is fixedly connected to the inner wall of the base (51), the outer walls of the diversion jet pipe (558) and the diversion air guide pipe (556) are both fixedly connected to the outer wall of the base (51), and an air extraction hole (553) is opened in the wall of the air inlet cylinder (551); The air guide component (554) includes a positioning ring (401), the inner side of the positioning ring (401) is fixedly connected to a fixing rod (402), both ends of the fixing rod (402) are fixedly connected to a limiting block (403), both sides of the positioning ring (401) are fixedly connected to a coil spring (404), one end of the coil spring (404) away from the positioning ring (401) is fixedly connected to a baffle (405), the inner side of the baffle (405) is slidably connected to the outer wall of the fixing rod (402), the outer wall of the positioning ring (401) is fixedly connected to the inner wall of the air inlet tube (551), and the inner wall of the air inlet tube (551) is slidably connected to the outer wall of the baffle (405); The adsorption assembly (56) comprises a fixed sleeve (561), the inner side of the fixed sleeve (561) is slidably connected to an ejection sleeve (562), the bottom of the ejection sleeve (562) is fixedly connected to a return spring (563), the bottom end of the return spring (563) is fixedly connected to a bottom plate (564), the top of the bottom plate (564) is fixedly connected to an insertion rod (565), and the bottom of the insertion rod (565) is fixedly slidably connected to a retaining ring (566); The outer wall of the fixing sleeve (561) is fixedly connected to the inner wall of the base (51), the bottom of the bottom plate (564) is fixedly connected to the bottom of the inner wall of the base (51), the outer wall of the retaining ring (566) is slidably connected to the inner wall of the fixing sleeve (561), and the bottom of the retaining ring (566) is fixedly connected to the outer wall of the ejection sleeve (562).

2. The CNC gantry milling machine for a CNC machining center according to claim 1, characterized in that: The outer side of the movable frame (61) is slidably connected to the outer wall of the gantry frame (2), the inner wall of the movable frame (61) is threadedly connected to the outer wall of the X-axis screw rod (4), the outer wall of the guide rod (62) is slidably connected to the inner wall of the movable frame (61), and the output end of the drive motor (65) is fixedly connected to the top of the tool holder (66).

3. The CNC gantry milling machine for a CNC machining center according to claim 1, characterized in that: The cooling device (68) includes a cooling water tank (681), the bottom of the cooling water tank (681) is fixedly connected to a connecting pipe (682), one end of the connecting pipe (682) away from the cooling water tank (681) is fixedly connected to a telescopic pipe (683), the bottom end of the telescopic pipe (683) is fixedly connected to a spray pipe (684), the bottom of the spray pipe (684) is fixedly connected to a material blocking assembly (685), the outer side of the cooling water tank (681) is fixedly connected to the outer side of the movable frame (61), the outer side of the movable frame (61) is fixedly connected to the outer wall of the telescopic pipe (683), and the bottom of the mounting plate (63) is fixedly connected to the top of the material blocking assembly (685).

4. The CNC gantry milling machine for a CNC machining center according to claim 3, characterized in that: The material blocking assembly (685) includes a fixed ring (851), the bottom of the fixed ring (851) is fixedly connected to a limiting rod (852), the bottom of the limiting rod (852) is slidably connected to a shielding shell (854), the bottom of the shielding shell (854) is slidably connected to a ball (855), the top of the shielding shell (854) is fixedly connected to a compression spring (853), the top of the compression spring (853) is fixedly connected to the bottom of the fixed ring (851), and the top of the fixed ring (851) is fixedly connected to the bottom of the mounting plate (63).

5. The CNC gantry milling machine for a CNC machining center according to claim 1, characterized in that: The inner side of the slider (52) is slidably connected to the top of the base (1), the inner side of the threaded sleeve (53) is threadedly connected to the outer wall of the Y-axis screw rod (3), and the outer wall of the Y-axis screw rod (3) is slidably connected to the inner side of the cleaning component (54).

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