A large double-column CNC gantry machining center

Abstract

This application relates to the field of CNC gantry technology and discloses a large double-column CNC gantry machining center, including two columns. A guide groove is formed at the top of a guide rail, and the top of the guide rail is movably connected to the top of the column through the guide groove. A rack is fixedly connected to the left and right walls of a rack located inside the guide groove. Rotation grooves are formed on the left and right walls of the column, and the bottom of the column is fixedly connected to a rotating component through the rotation groove. The rotating component meshes with the rack. A counterweight mechanism is fixedly connected to the bottom of the column and is positioned above the guide rail. This invention, by establishing a counterweight mechanism on the column, and with the counterweight mechanism located at the bottom of the column (i.e., a low-position counterweight), effectively lowers the center of gravity of the column, improves the structural stability of the column, and prevents overturning, swaying, and instability.

Description

Technical Field

[0001] This application relates to the field of CNC gantry technology, and in particular to a large double-column CNC gantry machining center. Background Technology

[0002] In modern manufacturing, large double-column CNC gantry machining centers are high-end CNC machine tools specifically designed for processing giant, heavy, or complex-shaped workpieces. Two columns are connected by a crossbeam that spans above the worktable, giving the equipment extremely high rigidity and stability. The CNC system controls the movement of the cutting tools to perform precise cutting, drilling, milling, and other machining operations, thus possessing high-efficiency machining capabilities. They are widely used in industries such as machinery manufacturing, aerospace, and automobile manufacturing.

[0003] However, existing large double-column CNC gantry machining centers still have some drawbacks in use: First, the columns are set too high, resulting in a high center of gravity, which can reduce overall stability and increase the risk of overturning, swaying, and instability, especially during the column start-up and shutdown phases; Second, during machining, debris often splashes into the guide rails connected to the columns, causing the columns to come into contact with and rub against the scattered debris as they move within the guide rails, accelerating the wear of the guide rails and columns and shortening their service life. Summary of the Invention

[0004] This application proposes a large double-column CNC gantry machining center with a counterweight mechanism, which effectively enhances the stability of the columns and extends the service life of the columns and guide rails. This solves the problem of poor stability caused by the column height setting and the problem of severe wear caused by the failure to clean up debris in time.

[0005] To achieve the above objectives, this application adopts the following technical solution: a large double-column CNC gantry machining center, comprising:

[0006] The number of columns is two;

[0007] The guide rail has a guide groove at its top end, and the top end of the guide rail is movably connected to the top end of the column through the guide groove.

[0008] The rack is located inside the guide groove, and racks are fixedly connected to the left and right walls of the rack.

[0009] The rotating component has rotating grooves on both the left and right walls of the column, and the bottom end of the column is fixedly connected to the rotating component through the rotating grooves. The rotating component meshes with the rack.

[0010] A counterweight mechanism is fixedly connected to the bottom end of the column, and the counterweight mechanism is set above the guide rail to lower the center of gravity of the column.

[0011] Furthermore, the counterweight mechanism includes:

[0012] A limiting component, wherein the inner wall of the limiting component is fixedly sleeved with the outer wall of the column, and the left and right ends of the limiting component are respectively movably engaged with the two ends of the guide rail;

[0013] A connecting member is provided at the front and rear ends of the limiting member, and one end of the connecting member is fixedly connected to the end of the limiting member;

[0014] The counterweight component, wherein the other end of the connecting component is fixedly connected to one end of the counterweight component, is used to enhance the longitudinal weight balance of the column.

[0015] Furthermore, the counterweight component includes:

[0016] An auxiliary housing is disposed within the guide groove of the guide rail, and there is a spatial gap between the bottom surface of the auxiliary housing and the bottom surface of the guide groove of the guide rail.

[0017] Auxiliary rollers are movably provided at the four corners of the bottom end of the auxiliary housing, and the bottom surface of the auxiliary rollers contacts the bottom surface of the guide groove of the guide rail.

[0018] An adjustment component is provided, wherein an adjustment cavity is provided on the upper part of the auxiliary housing, and the auxiliary housing is connected to the adjustment component through the adjustment cavity, for correcting the longitudinal center of gravity position of the column.

[0019] Furthermore, the adjusting member includes:

[0020] The regulating bladder is made of rubber and filled with liquid. The bottom surface of the regulating bladder is fixedly connected to the bottom surface of the regulating cavity of the auxiliary housing.

[0021] The regulating valve has its lower half fixedly connected to one end of the regulating bladder, and the other end of the regulating valve is fixedly sleeved on the auxiliary housing end away from the connecting component.

[0022] An adjusting plate is movably sleeved within the adjusting cavity of the auxiliary housing, and the top surface of the adjusting bladder is fixedly connected to the bottom surface of the adjusting plate. The top surface of the adjusting plate is connected to the top surface of the adjusting cavity of the auxiliary housing via an adjusting spring.

[0023] Furthermore, the counterweight component also includes:

[0024] The power component has a collection cavity at the bottom of the auxiliary housing, and the auxiliary housing is connected to the power component through the collection cavity to collect debris in the guide rail groove in a timely manner.

[0025] The movable component, located between the adjustment chamber and the collection chamber, has a movable cavity inside the auxiliary housing, and the auxiliary housing is connected to the movable component through the movable cavity, for timely cleaning of debris attached to the rack.

[0026] Furthermore, the power component includes:

[0027] An air pump is provided inside the auxiliary housing located between the collecting chamber and the moving chamber. The collecting chamber and the moving chamber are connected through the power hole. An air pump is fixedly installed inside the power hole of the auxiliary housing. The air pump's suction end faces the collecting chamber, and the air pump's exhaust end faces the moving chamber.

[0028] The upper filter plate is fixedly connected to the top surface of the collection cavity of the auxiliary housing;

[0029] The auxiliary housing has two movably arranged lower filter plates on the bottom surface of the collection chamber. The two lower filter plates are symmetrically arranged. The length of the lower filter plate is shorter than half the length of the collection chamber, and the cross-sectional shape of the lower filter plate is an isosceles trapezoid. The bottom end of the auxiliary housing has a number of collection holes communicating with the collection chamber. The number of collection holes is even. The lower filter plates have transition holes. The number of transition holes on one lower filter plate is half the number of collection holes on one auxiliary housing.

[0030] The auxiliary housing has a U-shaped groove that is movably opened inside, and the auxiliary housing is movably connected to the power rope through the U-shaped groove. One end of the power rope is fixedly connected to the wall of the lower filter plate. A lower spring is sleeved on the end of the power rope located in the collection cavity, and the two ends of the lower spring are fixedly connected to the wall of the auxiliary housing and the wall of the lower filter plate, respectively.

[0031] Furthermore, the movable component includes:

[0032] The movable bladder is movably sleeved inside the movable cavity of the auxiliary shell, and the bottom center of the movable bladder is fixedly connected to the power hole of the auxiliary shell.

[0033] The movable valve is fixedly sleeved inside both ends of the movable bladder, and the amount of gas flowing through the movable valve is fixed per unit time.

[0034] The movable plate is fixedly connected to both ends of the movable bladder, and the cross-sectional shape of the movable plate is U-shaped. The other end of the power rope is fixedly connected to the wall of the movable plate. An upper spring is sleeved on the end of the movable plate located in the movable cavity, and the two ends of the upper spring are fixedly connected to the wall of the auxiliary shell and the wall of the movable plate, respectively.

[0035] The auxiliary housing has movable holes on its left and right walls, and the movable strip is movably disposed in the movable holes of the auxiliary housing. The movable strip is flush with the height of the rack, and one end of the movable strip is fixedly connected to one end of the movable plate. The other end of the movable strip is in contact with the wall of the rack. The auxiliary housing has several downwardly oriented vent holes on its left and right walls, and the vent holes are not located at the positions of the movable holes.

[0036] Furthermore, before the column starts or stops instantaneously, the air pump is turned on and the amount of gas sucked and discharged by the air pump per unit time is adjusted to the maximum. At this time, the collection chamber located below the air pump applies the maximum negative pressure adsorption force to the bottom surface of the rack, and the gas pressure in the movable bladder located above the air pump increases to the maximum, causing the movable plate to push the movable strip to fit tightly against the wall of the rack.

[0037] When cleaning the guide rail, turn on the air pump and adjust the amount of gas pumped and discharged per unit time to be higher than the amount of gas flowing through the active valve per unit time, and then adjust it to be equal to the amount of gas flowing through the active valve per unit time. At this time, the gas pressure in the active bladder above the air pump increases, causing the active plate to push the active strip against the wall of the rack. However, the active strip can move along the shape of the rack. The collection chamber below the air pump applies a negative pressure adsorption force to the bottom surface of the guide groove of the rack.

[0038] Furthermore, the column and rotating component are constituent parts of the working mechanism, and the working mechanism is connected to the CNC system to cooperate with the CNC system to perform machining on the workpiece. The working mechanism also includes:

[0039] A crossbeam, which is fixedly mounted on the top of two columns;

[0040] The sliding saddle is movably connected to the rear side of the crossbeam.

[0041] The slide ram, the front side of which is movably connected to the wall of the slide ram, and the bottom end of the slide ram is connected to the cutting tool;

[0042] A workbench is provided below the crossbeam and is located between two columns.

[0043] Furthermore, the guide rail and rack are components of the fixing mechanism. There are two fixing mechanisms, located on the left and right sides of the worktable respectively, used for load-bearing and guiding the working mechanism. The fixing mechanism also includes:

[0044] Fixed plates are fixedly connected to both the front and rear ends of the guide rail.

[0045] The beneficial effects of this invention are as follows:

[0046] This application provides a large double-column CNC gantry machining center. By setting up a counterweight mechanism on the column, and the counterweight mechanism is located at the bottom of the column, i.e., a low-position counterweight, the center of gravity of the column is effectively lowered, the structural stability of the column is improved, and the overturning, swaying and instability are prevented.

[0047] By designing a counterweight mechanism that includes limiting components, connecting components, and counterweight components, with the counterweight components respectively located on the front and rear sides of the column, and each counterweight component including an auxiliary housing, auxiliary rollers, and adjusting components, the longitudinal center of gravity of the column is accurately measured periodically using measuring equipment such as a laser plumb line and a load cell. If the center of gravity of the column is too far forward or too far back, the weight of the two counterweight components located at the front and rear of the column is adjusted using the adjusting components to correct the position of the column's center of gravity, making its longitudinal center of gravity centered, thereby further improving the structural stability of the column.

[0048] By designing the counterweight components, which include a power component consisting of an air pump, upper filter plate, lower filter plate, and power rope, and a movable component consisting of a movable bladder, movable valve, movable plate, and movable bar, the air pump is started before the column starts and stops, and the amount of gas sucked and discharged per unit time is adjusted to the maximum. At this time, the negative pressure suction force generated by the air pump can push the movable bar against the rack with maximum force, and can also make the auxiliary shell vertically produce the maximum suction effect on the rack. Afterwards, the air pump slowly reduces the amount of gas sucked and discharged per unit time until it stops working, so as to slowly relax the restraining effect on the column, thereby effectively enhancing the stability of the column during the start-up and shutdown phases. During guide rail cleaning, the air pump is started, and the air pump's suction and discharge volume per unit time is first adjusted to be higher than the gas flow volume per unit time of the movable valve, and then adjusted to be equal to the gas flow volume per unit time of the movable valve. At this time, the movable strip is subjected to the negative pressure suction force generated by the air pump and comes into contact with the rack. The movable strip can move along the shape of the rack, so that the movable strip effectively cleans the debris attached to the rack. At the same time, the collection chamber of the auxiliary housing is subjected to the negative pressure suction force generated by the air pump and fully adsorbs the debris that falls into the rack guide groove. This fully realizes the timely cleaning of debris, reduces the wear rate between the column, guide rail and rack, and extends their service life. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort:

[0050] Figure 1 This is a three-dimensional structural diagram of the entire invention;

[0051] Figure 2 This is a partial three-dimensional structural diagram of the column, fixing mechanism, and counterweight mechanism in this invention;

[0052] Figure 3 This is a three-dimensional structural diagram showing the disassembled column, fixing mechanism, and counterweight mechanism in this invention;

[0053] Figure 4 This is a three-dimensional structural diagram of the column, fixing mechanism, and counterweight mechanism located in the cross-section of the fixing mechanism in this invention;

[0054] Figure 5 This is a three-dimensional structural diagram of the column, fixing mechanism and counterweight mechanism located in the cross section of the counterweight component in this invention;

[0055] Figure 6 This is a three-dimensional structural diagram of the column and counterweight mechanism in this invention;

[0056] Figure 7 This is a three-dimensional structural diagram of the counterweight mechanism in this invention;

[0057] Figure 8 This is a three-dimensional structural diagram of the counterweight component in this invention.

[0058] Figure 9 This is a side cross-sectional perspective view of the counterweight component in this invention.

[0059] Figure 10 This is a frontal cross-sectional three-dimensional structural diagram of the counterweight component in this invention;

[0060] Figure 11 This is a three-dimensional structural diagram of the rack, power component, and moving component in this invention;

[0061] Figure 12 This is a three-dimensional structural diagram of the power component and the moving component in this invention;

[0062] Figure 13 This is a cross-sectional three-dimensional structural view of the power component and the moving component in this invention.

[0063] In the diagram: 1. Working mechanism; 11. Column; 12. Crossbeam; 13. Saddle; 14. Ram; 15. Worktable; 16. Rotating component; 2. Fixing mechanism; 21. Guide rail; 22. Rack; 23. Fixed plate; 3. Counterweight mechanism; 31. Limiting component; 32. Connecting component; 4. Counterweight component; 41. Auxiliary housing; 42. Auxiliary roller; 5. Adjusting component; 51. Adjusting bladder; 52. Adjusting valve; 53. Adjusting plate; 6. Power component; 61. Air pump; 62. Upper filter plate; 63. Lower filter plate; 64. Power rope; 7. Moving component; 71. Moving bladder; 72. Moving valve; 73. Moving plate; 74. Moving bar. Detailed Implementation

[0064] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0065] Example 1, as Figure 1 A large double-column CNC gantry machining center includes a working mechanism 1 connected to a CNC system for machining workpieces. The working mechanism 1 includes columns 11, a crossbeam 12, a slide saddle 13, a slide ram 14, a worktable 15, and a rotating component 16. Two columns 11 are present, and the crossbeam 12 is fixedly mounted on the tops of the two columns 11. The wall of the crossbeam 12 is movably connected to the rear side of the slide saddle 13, and the front side of the slide saddle 13 is connected to the wall of the slide ram 14. The surface is movable, and the bottom end of the slide 14 is connected to the cutting tool. A worktable 15 is set below the crossbeam 12 and is located between the two columns 11. The worktable 15 is used to fix the workpiece and improve the stability of the workpiece processing. Under the precise control of the CNC system, the columns 11 move longitudinally along the X-axis, the slide saddle 13 moves laterally along the Y-axis, and the slide 14 moves vertically along the Z-axis to drive the cutting tool to perform milling, drilling, boring and other processing operations on the workpiece according to the preset path.

[0066] like Figures 1-5 There are two fixing mechanisms 2, located on the left and right sides of the workbench 15 respectively. These mechanisms support and guide the working mechanism 1. Each fixing mechanism 2 includes a guide rail 21, a rack 22, and a fixed plate 23. The top of the guide rail 21 has a guide groove, which is movably connected to the top of the column 11. This is a crucial component restricting the movement path of the column 11. The rack 22, located inside the guide groove, has racks 22 fixedly connected to its left and right walls. This is a crucial component driving the movement of the column 11. Figure 6 The left and right walls of the column 11 are provided with rotating grooves, and the bottom end of the column 11 is fixedly connected to the rotating component 16 through the rotating grooves. Since there are two rotating components 16, the synchronization accuracy and position accuracy of the column 11 when it moves as a whole are effectively guaranteed. The rotating component 16 and the rack 22 mesh with each other, so that the two cooperate with each other to realize the horizontal movement of the column 11 on the guide rail 21. The front end and the rear end of the guide rail 21 are fixedly connected with a fixed plate 23 to limit the length of the guide rail 21 and prevent the column 11 from falling off the guide rail 21.

[0067] like Figures 1-7A counterweight mechanism 3 is fixedly connected to the bottom end of the column 11, and the counterweight mechanism 3 is positioned above the guide rail 21 to lower the center of gravity of the column 11. The counterweight mechanism 3 includes a limiting member 31, a connecting member 32, and a counterweight member 4. The inner wall of the limiting member 31 is fixedly sleeved to the outer wall of the column 11 by bolts. The left and right ends of the limiting member 31 are respectively movably engaged with the two ends of the guide rail 21. The design of the limiting member 31 ensures both the stability of the connection between the counterweight mechanism 3 and the column 11 and enhances the stability of the counterweight mechanism 3 moving on the guide rail 21. The front and rear ends of the limiting member 31 are respectively provided with a... A connecting member 32 is provided, with one end of the connecting member 32 fixedly connected to the end of the limiting member 31 by bolts, and the other end of the connecting member 32 fixedly connected to one end of the counterweight member 4 by bolts. The counterweight member 4 is stabilized at the lower position of the column 11 by the limiting member 31 and the connecting member 32, so as to realize the low-position counterweight of the column 11, thereby effectively lowering the center of gravity of the column 11, improving the structural stability of the column 11, and preventing overturning, swaying and instability. At the same time, the two counterweight members 4 are respectively set in front of and behind the column 11, so as to enhance the balance of the counterweight in the longitudinal direction of the column 11.

[0068] Example 2, based on Example 1, such as Figures 1-10 The counterweight component 4 includes an auxiliary housing 41, auxiliary rollers 42, and an adjusting component 5. The auxiliary housing 41 is set in the guide groove of the guide rail 21, and there is a space gap between the bottom surface of the auxiliary housing 41 and the bottom surface of the guide groove of the guide rail 21. The four corners of the bottom end of the auxiliary housing 41 are respectively movably provided with auxiliary rollers 42, and the bottom surface of the auxiliary rollers 42 contacts the bottom surface of the guide groove of the guide rail 21. The auxiliary rollers 42 stably support the auxiliary housing 41, so that the bottom surface of the auxiliary housing 41 fully faces the bottom surface of the guide groove of the guide rail 21, thereby helping to thoroughly clean the debris remaining in the guide groove. An adjusting cavity is opened in the upper part of the interior of the auxiliary housing 41, and the auxiliary housing 41 is connected to the adjusting component 5 through the adjusting cavity, which is used to correct the longitudinal center of gravity position of the column 11.

[0069] like Figures 8-10The adjusting component 5 includes an adjusting bladder 51, an adjusting valve 52, and an adjusting plate 53. The adjusting bladder 51 is made of stretchable and highly wear-resistant rubber, and its interior is filled with a high-density liquid. The bottom surface of the adjusting bladder 51 is fixedly connected to the bottom surface of the adjusting cavity of the auxiliary housing 41. The lower half of the adjusting bladder 51 is fixedly connected to one end of the adjusting valve 52, and the other end of the adjusting valve 52 is fixedly sleeved on the end of the auxiliary housing 41 away from the connecting component 32. The adjusting valve 52 allows liquid to be filled into or discharged from the adjusting bladder 51 to adjust the amount of liquid in the adjusting bladder 51 and change the weight of the counterweight component 4. With the cooperation of the two counterweight components 4, the center of gravity of the column 11 is corrected, making its longitudinal center of gravity central, thereby further improving the structural stability of the column 11. The adjusting plate 53 is movably sleeved in the adjusting cavity of the auxiliary housing 41, and the top surface of the adjusting bladder 51 is fixedly connected to the bottom surface of the adjusting plate 53. The top surface of the adjusting plate 53 is connected to the top surface of the adjusting cavity of the auxiliary housing 41 through an adjusting spring. By using the adjusting plate 53 and the adjusting spring, the volume of the adjusting bladder 51 is effectively compressed, making it compatible with the volume of the liquid inside, thereby reducing the shaking effect of the adjusting bladder 51 and the liquid inside during use.

[0070] It also includes measuring equipment, such as laser plumb bob and load cell, to accurately measure the longitudinal center of gravity of column 11. If the center of gravity of column 11 is too far forward or too far back, the weight of the two counterweight components 4 located in front of and behind column 11 is adjusted by adjusting component 5. If the center of gravity is too far forward, the weight of the rear counterweight component 4 is increased; if the center of gravity is too far back, the weight of the front counterweight component 4 is increased, so as to correct the position of the center of gravity of column 11, so that its longitudinal center of gravity is centered, and further improve the structural stability of column 11.

[0071] Example 3, based on Example 2, such as Figure 8 The counterweight component 4 also includes a power component 6 and a movable component 7. A collection chamber is provided at the lower part of the auxiliary housing 41, and the auxiliary housing 41 is connected to the power component 6 through the collection chamber to collect debris from the guide groove of the guide rail 21 in a timely manner. A movable chamber is provided inside the auxiliary housing 41 located between the adjustment chamber and the collection chamber, and the auxiliary housing 41 is connected to the movable component 7 through the movable chamber to clean debris adhering to the rack 22 in a timely manner. The power component 6 includes an air pump 61, an upper filter plate 62, a lower filter plate 63, and a power rope 64. The movable component 7 includes a movable bladder 71, a movable valve 72, a movable plate 73, and a movable bar 74. Specifically:

[0072] like Figures 9-13An auxiliary housing 41 located between the collection chamber and the movable chamber has a power hole inside, and the collection chamber and the movable chamber are connected through the power hole. An air pump 61 is fixedly installed inside the power hole of the auxiliary housing 41. The air pump 61's suction end faces the collection chamber, and its exhaust end faces the movable chamber, effectively restricting the direction of gas movement within the auxiliary housing 41, thereby providing power to fully collect debris into the collection chamber. An upper filter plate 62 is fixedly connected to the top surface of the collection chamber of the auxiliary housing 41, which can prevent debris in the collection chamber from entering the air pump 61, thereby improving the protection of the air pump 61. Two lower filter plates 63 are movably installed on the bottom surface of the collection chamber of the auxiliary housing 41, and the two lower filter plates 63 are symmetrically arranged. The length of the lower filter plate 63 is shorter than half the length of the collection chamber, and the cross-sectional shape of the lower filter plate 63 is an isosceles trapezoid, allowing the lower filter plate 63 to move horizontally within the collection chamber without being affected by debris. The bottom end of the auxiliary housing 41 has several collection holes communicating with the collection chamber, and the number of collection holes is even. The lower filter plate 63 has transition holes, and the number of transition holes on one lower filter plate 63 is half the number of collection holes on one auxiliary housing 41. If the transition hole aligns with the collection hole, the debris collection channel is opened, facilitating debris entry into the collection chamber. If the transition hole does not align with the collection hole, the debris collection channel is closed, preventing secondary leakage of debris into the guide rail 21. The internal movement of the auxiliary housing 41... A U-shaped groove is provided, and the auxiliary housing 41 is movably connected to the power rope 64 through the U-shaped groove. One end of the power rope 64 is fixedly connected to the wall of the lower filter plate 63. A lower spring is sleeved on the end of the power rope 64 located in the collection cavity, and both ends of the lower spring are fixedly connected to the wall of the auxiliary housing 41 and the wall of the lower filter plate 63, respectively. The other end of the power rope 64 is fixedly connected to the wall of the movable plate 73. An upper spring is sleeved on the end of the movable plate 73 located in the movable cavity, and both ends of the upper spring are fixedly connected to the wall of the auxiliary housing 41 and the wall of the movable plate 73, respectively. By utilizing the cooperative design of the power rope 64, the lower filter plate 63, and the movable plate 73, the movable plate 73 and the lower filter plate 63 are in different positions at different stages. The movable plate 73 is positioned to perform different functions. Specifically, when the air pump 61 is not working, the movable plate 73 is not subjected to gas pressure. At this time, the movable plate 73 moves towards the middle of the movable cavity under the action of its upper spring. Then, the power rope 64 is pulled, and the lower filter plate 63 moves towards the end of the collection cavity against the tension of the lower spring. This causes the transition hole to not align with the collection hole, thereby closing the debris collection channel. When the air pump 61 is working, the movable plate 73 is subjected to gas pressure. At this time, the movable plate 73 moves towards the end of the movable cavity against the tension of the upper spring. Then, the power rope 64 is pulled, and the lower filter plate 63 moves towards the middle of the collection cavity under the tension of the lower spring. This causes the transition hole to align with the collection hole, opening the debris collection channel.

[0073] like Figures 9-13A movable bladder 71 is movably sleeved inside the movable cavity of the auxiliary housing 41, and the bottom center of the movable bladder 71 is fixedly connected to the power hole of the auxiliary housing 41. Movable valves 72 are fixedly sleeved inside both ends of the movable bladder 71, and the amount of gas flowing through the movable valves 72 is quantitative per unit time. Therefore, when the amount of gas sucked and discharged by the air pump 61 per unit time is changed, the gas pressure inside the movable bladder 71 can be changed by the movable valves 72, thereby assisting the movement of the movable plate 73. Movable plates 73 are fixedly connected to both ends of the movable bladder 71, and the cross-sectional shape of the movable plates 73 is U-shaped, thus providing space for the installation of the power rope 64 and its lower spring. Movable openings are provided on the left and right walls of the auxiliary housing 41. The auxiliary housing 41 has a movable hole, and the movable strip 74 is movably disposed in the movable hole. The movable strip 74 is flush with the height of the rack 22, and one end of the movable strip 74 is fixedly connected to one end of the movable plate 73. The other end of the movable strip 74 contacts the wall surface of the rack 22. The movable strip 74 can rub against the wall surface of the rack 22 to clean the debris attached to the rack 22. The left and right walls of the auxiliary housing 41 are provided with several downwardly oriented exhaust holes, and the exhaust holes are not located at the location of the movable hole. Thus, the gas discharged by the movable valve 72 can be discharged to the outside of the auxiliary housing 41 in a timely manner through the exhaust holes and discharged onto the rack 22 being rubbed and cleaned, further improving the cleaning effect of the debris attached to the rack 22.

[0074] Before the column 11 starts or stops instantaneously, the air pump 61 is turned on and the amount of gas sucked and discharged by the air pump 61 per unit time is adjusted to the maximum. At this time, the collection chamber located below the air pump 61 applies the maximum negative pressure adsorption force to the bottom surface of the rack 22 to enhance the adsorption effect of the counterweight component 4 on the guide rail 21. The gas pressure in the movable bladder 71 located above the air pump 61 increases to the maximum, causing the movable plate 73 to push the movable strip 74 to fit tightly against the wall of the rack 22 to enhance the locking effect of the counterweight component 4 on the rack 22. Afterward, the air pump 61 slowly reduces the amount of gas sucked and discharged per unit time until it stops working, so as to slowly relax the restriction on the column 11, thereby effectively enhancing the stability of the column 11 during the start-up and shutdown phase.

[0075] When cleaning the guide rail 21, turn on the air pump 61 and adjust the amount of gas pump 61 sucked and discharged per unit time to be higher than the amount of gas flowing through the movable valve 72 per unit time, and then adjust it to be equal to the amount of gas flowing through the movable valve 72 per unit time. At this time, the gas pressure in the movable bladder 71 located above the air pump 61 increases, causing the movable plate 73 to push the movable bar 74 against the wall of the rack 22. However, the movable bar 74 can move along the shape of the rack 22, effectively making the movable bar 74 rub and clean the debris attached to the rack 22, and causing the exhaust hole to blow the cleaned debris downward. The collection chamber located below the air pump 61 applies negative pressure adsorption force to the bottom surface of the guide groove of the rack 22, effectively collecting the debris that falls to the bottom surface of the guide groove of the rack 22, thereby effectively achieving timely cleaning and collection of debris, reducing the wear rate between the column 11 and the guide rail 21 and the rack 22, and extending their service life.

[0076] The working principle of this invention is as follows:

[0077] Before using the column 11, the longitudinal center of gravity of the column 11 is measured using a measuring device. Based on the measurement results, liquid is injected into the two adjusting components 5 to adjust the self-weight of the two counterweight components 4 located in front of and behind the column 11, correct the position of the center of gravity of the column 11, and make its longitudinal center of gravity centered, thereby improving the structural stability of the column 11. When the column 11 is in use, the column 11 uses the counterweight mechanism 3 to achieve low-position counterweight, which effectively lowers the center of gravity of the column 11, further improving the structural stability of the column 11 and preventing overturning, swaying and instability.

[0078] Before the column 11 starts or stops instantaneously, the air pump 61 is turned on and the amount of gas pumped and discharged per unit time is adjusted to the maximum. At this time, with the action of the air pump 61, the collection chamber located below the air pump 61 applies the maximum negative pressure adsorption force to the bottom surface of the rack 22 to enhance the adsorption effect of the counterweight component 4 on the guide rail 21. The movable bladder 71 located above the air pump 61 is continuously discharged with gas, but the discharge volume of the movable valve 72 remains unchanged, thereby increasing the gas pressure in the movable bladder 71 to the maximum, which in turn causes the movable plate 73 to push the movable strip 74 to fit tightly against the wall of the rack 22 to enhance the locking effect of the counterweight component 4 on the rack 22. Afterwards, the air pump 61 slowly reduces the amount of gas pumped and discharged per unit time until it stops working, so as to slowly relax the restriction effect on the column 11. In summary, the air pump 61 provides immediate assistance to the column 11, which is about to change its state, to effectively enhance the stability of the column 11 during the start-up and shutdown phases.

[0079] When cleaning is required inside the fixed mechanism 2, the air pump 61 is turned on, and the amount of gas pump 61 sucks in and discharges per unit time is first adjusted to be higher than the amount of gas flowing through the movable valve 72 per unit time, and then adjusted to be equal to the amount of gas flowing through the movable valve 72 per unit time. At this time, with the action of the air pump 61, the gas pressure in the movable bladder 71 located above the air pump 61 increases, causing the movable plate 73 to push the movable strip 74 against the wall of the rack 22. However, the gas pressure in the movable bladder 71 cannot be fully expanded due to the action of the air pump 61, so that the movable strip 74 cannot tightly fit against the rack 22. The gas moves along the shape of the rack 22, effectively cleaning the debris attached to the rack 22. Then, the gas passes through the active valve 72 and is discharged from the exhaust port, effectively blowing the cleaned debris downward to the bottom surface of the guide groove of the rack 22. At the same time, the collection chamber located below the air pump 61 applies negative pressure adsorption force to the bottom surface of the guide groove of the rack 22, effectively collecting the debris that falls to the bottom surface of the guide groove of the rack 22. This fully realizes the timely cleaning and collection of debris, reduces the wear rate between the column 11 and the guide rail 21 and the rack 22, and extends their service life.

[0080] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A large double column CNC gantry machining center characterized by, include: The number of columns (11) is two; The guide rail (21) has a guide groove at its top end, and the top end of the guide rail (21) is movably connected to the top end of the column (11) through the guide groove. The rack (22) located inside the guide groove has racks (22) fixedly connected to the left and right walls; Rotating component (16), the left and right walls of the column (11) are provided with rotating grooves, and the bottom end of the column (11) is fixedly connected to the rotating component (16) through the rotating grooves. The rotating component (16) and the rack (22) mesh with each other. The counterweight mechanism (3) is fixedly connected to the bottom end of the column (11), and the counterweight mechanism (3) is set above the guide rail (21) to lower the center of gravity of the column (11).

2. The large two-column CNC gantry machining center according to claim 1, characterized in that, The counterweight mechanism (3) includes: The limiting component (31) has its inner wall fixedly sleeved with the outer wall of the column (11), and its left and right ends are respectively movably engaged with the two ends of the guide rail (21). A connecting member (32) is provided at the front and rear ends of the limiting member (31), and one end of the connecting member (32) is fixedly connected to the end of the limiting member (31); The counterweight component (4) is fixedly connected to one end of the connecting component (32) to enhance the longitudinal counterweight balance of the column (11).

3. The large double-column CNC gantry machining center according to claim 2, characterized in that, The counterweight component (4) includes: An auxiliary housing (41) is disposed in the guide groove of the guide rail (21), and there is a space gap between the bottom surface of the auxiliary housing (41) and the bottom surface of the guide groove of the guide rail (21). Auxiliary rollers (42) are movably provided at the four corners of the bottom end of the auxiliary housing (41), and the bottom surface of the auxiliary rollers (42) is in contact with the bottom surface of the guide groove of the guide rail (21). Adjustment component (5): An adjustment cavity is provided on the upper part of the auxiliary housing (41), and the auxiliary housing (41) is connected to the adjustment component (5) through the adjustment cavity, which is used to correct the longitudinal center of gravity position of the column (11).

4. The large double-column CNC gantry machining center according to claim 3, characterized in that, The adjusting member (5) includes: The regulating bladder (51) is made of rubber and is filled with liquid. The bottom surface of the regulating bladder (51) is fixedly connected to the bottom surface of the regulating cavity of the auxiliary housing (41). The regulating valve (52) has its lower half fixedly connected to one end of the regulating bladder (51), and the other end of the regulating valve (52) is fixedly sleeved on one end of the auxiliary housing (41) away from the connecting member (32). Adjustment plate (53) is movably sleeved in the adjustment cavity of auxiliary housing (41), and the top surface of adjustment bladder (51) is fixedly connected to the bottom surface of adjustment plate (53). The top surface of adjustment plate (53) and the top surface of adjustment cavity of auxiliary housing (41) are connected by adjustment spring.

5. The large double-column CNC gantry machining center according to claim 4, characterized in that, The counterweight component (4) also includes: The power component (6) has a collection cavity at the bottom of the auxiliary housing (41), and the auxiliary housing (41) is connected to the power component (6) through the collection cavity to collect debris in the guide groove of the guide rail (21) in a timely manner. The movable part (7) is located inside the auxiliary housing (41) between the adjustment chamber and the collection chamber. The auxiliary housing (41) is connected to the movable part (7) through the movable cavity, and is used to clean the debris attached to the rack (22) in a timely manner.

6. The large double-column CNC gantry machining center according to claim 5, characterized in that, The power component (6) includes: An air pump (61) is provided inside the auxiliary housing (41) located between the collection chamber and the moving chamber. The collection chamber and the moving chamber are connected through the power hole. An air pump (61) is fixedly installed inside the power hole of the auxiliary housing (41). The air pump (61) has its suction end facing the collection chamber and its exhaust end facing the moving chamber. Upper filter plate (62), the upper filter plate (62) is fixedly connected to the top surface of the collection chamber of the auxiliary housing (41). The lower filter plate (63) is movably provided on the bottom surface of the collection chamber of the auxiliary housing (41), and the two lower filter plates (63) are symmetrically arranged. The length of the lower filter plate (63) is shorter than half the length of the collection chamber, and the cross-sectional shape of the lower filter plate (63) is an isosceles trapezoid. The bottom end of the auxiliary housing (41) is provided with a number of collection holes communicating with the collection chamber, and the number of collection holes is even. The lower filter plate (63) is provided with transition holes, and the number of transition holes on one lower filter plate (63) is half the number of collection holes on one auxiliary housing (41). The auxiliary housing (41) has a U-shaped groove that is movably opened inside the power rope (64) and the auxiliary housing (41) is movably connected to the power rope (64) through the U-shaped groove. One end of the power rope (64) is fixedly connected to the wall of the lower filter plate (63). The end of the power rope (64) located in the collection cavity is fitted with a lower spring, and the two ends of the lower spring are fixedly connected to the wall of the auxiliary housing (41) and the wall of the lower filter plate (63) respectively.

7. The large double-column CNC gantry machining center according to claim 6, characterized in that, The movable component (7) includes: The movable bladder (71) is movably sleeved in the movable cavity of the auxiliary housing (41), and the bottom middle part of the movable bladder (71) is fixedly connected to the power hole of the auxiliary housing (41). The movable valve (72) is fixedly sleeved inside both ends of the movable bladder (71), and the amount of gas flowing through the movable valve (72) per unit time is quantitative. Movable plate (73), both ends of the movable bag (71) are fixedly connected to the movable plate (73), and the cross-sectional shape of the movable plate (73) is U-shaped. The other end of the power rope (64) is fixedly connected to the wall of the movable plate (73). The end of the movable plate (73) located in the movable cavity is sleeved with an upper spring, and the two ends of the upper spring are fixedly connected to the wall of the auxiliary shell (41) and the wall of the movable plate (73) respectively. The auxiliary housing (41) has movable holes on its left and right walls, and the movable strip (74) is movably disposed in the movable holes of the auxiliary housing (41). The movable strip (74) is flush with the height of the rack (22), and one end of the movable strip (74) is fixedly connected to one end of the movable plate (73). The other end of the movable strip (74) is in contact with the wall of the rack (22). The auxiliary housing (41) has several downwardly oriented exhaust holes on its left and right walls, and the exhaust holes are not located at the position of the movable holes.

8. The large double-column CNC gantry machining center according to claim 7, characterized in that, Before the column (11) starts or stops instantaneously, the air pump (61) is turned on and the amount of gas sucked and discharged by the air pump (61) per unit time is adjusted to the maximum. At this time, the collection chamber located below the air pump (61) applies the maximum negative pressure adsorption force to the bottom surface of the rack (22). The gas pressure in the movable bag (71) located above the air pump (61) increases to the maximum, causing the movable plate (73) to push the movable strip (74) to fit tightly against the wall of the rack (22). After that, the air pump (61) slowly reduces the amount of gas sucked and discharged per unit time until it stops working. When cleaning the guide rail (21), turn on the air pump (61) and adjust the amount of gas pump (61) sucked and discharged per unit time to be higher than the amount of gas flowing through the active valve (72) per unit time, and then adjust it to be equal to the amount of gas flowing through the active valve (72) per unit time. At this time, the gas pressure in the active bladder (71) above the air pump (61) increases, causing the active plate (73) to push the active bar (74) against the wall of the rack (22). However, the active bar (74) can move along the shape of the rack (22). The collection chamber below the air pump (61) applies negative pressure adsorption force to the bottom surface of the guide groove of the rack (22).

9. The large double-column CNC gantry machining center according to claim 1, characterized in that, The column (11) and the rotating component (16) are components of the working mechanism (1), and the working mechanism (1) is connected to the CNC system to cooperate with the CNC system to process the workpiece. The working mechanism (1) also includes: A crossbeam (12) is fixedly mounted on the top of two columns (11); The sliding saddle (13) is movably connected to the rear side of the crossbeam (12). The front side of the slide saddle (13) is movably connected to the wall of the slide saddle (14), and the bottom end of the slide saddle (14) is connected to the cutting tool; Workbench (15), a workbench (15) is provided below the crossbeam (12), and the workbench (15) is located between two columns (11).

10. The large double-column CNC gantry machining center according to claim 9, characterized in that, The guide rail (21) and rack (22) are components of the fixing mechanism (2). There are two fixing mechanisms (2), which are located on the left and right sides of the workbench (15) respectively, and are used to support and guide the working mechanism (1). The fixing mechanism (2) also includes: Fixed plate (23), the front end and the rear end of the guide rail (21) are fixedly connected to the fixed plate (23).

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