High speed numerical control gantry vertical and horizontal drilling and milling combined machine tool

Abstract

This invention discloses a high-speed CNC gantry vertical and horizontal drilling and milling composite machine tool, relating to the field of machine tool technology. It includes a horizontal machine tool, a vertical machine tool positioned centrally within the horizontal machine tool, a connecting end located at the output end of the vertical machine tool, and a twist drill movably engaged at the bottom of the connecting end. The twist drill also includes a first oil cavity sleeved outside the twist drill. This invention solves the problem of existing high-speed CNC gantry vertical and horizontal drilling and milling composite machine tools, where, after drilling through tubular or hollow workpieces, most of the debris enters the internal cavity of the workpiece due to the characteristics of the spiral groove structure. This debris is dispersed and easily gets stuck in the complex and narrow corners and crevices of the cavity, making cleaning extremely difficult. Specialized tools such as long, thin brushes and high-pressure air guns are required, consuming a significant amount of manpower and time, reducing production efficiency. Furthermore, the debris accumulated in the cavity may scratch and wear the internal surface of the workpiece, affecting machining quality and accuracy. Long-term residue can further damage the workpiece's performance due to oxidation and corrosion.

Description

Technical Field

[0001] This invention relates to the field of machine tool technology, specifically to a high-speed CNC gantry vertical and horizontal drilling and milling composite machine tool. Background Technology

[0002] The high-speed CNC gantry milling and drilling composite machine tool is a high-precision and high-efficiency CNC machine tool that integrates multiple functions such as vertical machining, horizontal machining, drilling, and milling.

[0003] For example, a high-speed CNC gantry vertical and horizontal drilling and milling composite machine tool with publication number CN116713815B can realize the loading and unloading of the driver and the vertical machining unit and the horizontal machining unit through the connecting mechanism, and can switch the position of the vertical machining unit and the horizontal machining unit through the turntable. It can freely switch between horizontal and vertical machining, and the gantry does not need to be moved when changing the vertical machining unit and the horizontal machining unit, which makes the positioning more accurate and facilitates the operation. However, the existing high-speed CNC gantry vertical and horizontal drilling and milling composite machine tools still have some shortcomings.

[0004] When performing drilling operations on existing high-speed CNC gantry milling and drilling composite machines, a problem arises when using the drill bit to drill through tubular workpieces or workpieces containing cavities: after the drill bit penetrates the workpiece, due to the structural characteristics of the drill bit's spiral grooves, most of the debris will directly enter the workpiece's internal cavity along these grooves. These debris particles are extremely dispersed and may become stuck in the complex shapes and narrow spaces of the cavity, making subsequent debris removal from the workpiece's internal cavity exceptionally difficult. Cleaning often requires specialized tools such as thin brushes and high-pressure air guns, which undoubtedly consumes a significant amount of manpower and time, greatly reducing production efficiency. Furthermore, the debris accumulated in the cavity may cause scratches and wear on the workpiece's internal surface, affecting the workpiece's machining quality and precision. If the debris remains for a long time, it may further damage the workpiece's performance due to oxidation and corrosion.

[0005] To address the aforementioned issues, there is an urgent need for innovative design based on the existing high-speed CNC gantry vertical and horizontal drilling and milling composite machine tool. Summary of the Invention

[0006] This invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different approach. Specifically, the invention aims to offer a high-speed CNC gantry milling and drilling machine that solves the problem mentioned in the background: when drilling tubular or hollow workpieces, existing high-speed CNC gantry milling and drilling machines suffer from the issue that, due to the spiral groove structure, most of the debris enters the internal cavity of the workpiece after drilling. This debris is dispersed and easily gets stuck in the complex and narrow corners and crevices of the cavity, making cleaning extremely difficult. Specialized tools such as long brushes and high-pressure air guns are required, consuming significant manpower and time, thus reducing production efficiency. Furthermore, the debris accumulated in the cavity can scratch and wear down the internal surface of the workpiece, affecting machining quality and accuracy. Long-term residue can also damage the workpiece's performance due to oxidation and corrosion.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a high-speed CNC gantry vertical and horizontal drilling and milling composite machine tool, comprising a horizontal machine tool, a vertical machine tool disposed in the center of the horizontal machine tool, a connecting end disposed at the output end of the vertical machine tool, and a twist drill movably latched at the bottom of the connecting end, wherein the twist drill further comprises a first oil cavity sleeved outside the twist drill;

[0008] The first piston is disposed in the first oil chamber and blocks the top of the first oil chamber;

[0009] The first spring has its two ends connected to the bottom of the connecting end and the top of the first piston, respectively.

[0010] A debris blocking assembly that is slidably installed at the end of the spiral groove of a twist drill and is pushed out based on oil to seal the end of the spiral groove;

[0011] A drill bit cleaning assembly that is mounted on a twist drill and uses hydraulic oil diversion to lift and clean debris from the spiral groove;

[0012] The debris blocking assembly includes a sealing block that is slidably disposed at the end of the spiral groove of the twist drill at an angle;

[0013] The drill bit cleaning assembly includes an oil supply pipe fixedly connected to the outer walls of both sides of the first oil chamber, a movable oil chamber sleeved at the end of the oil supply pipe, and a connecting ring sleeved on the twist drill. A cleaning block is rotatably disposed at the center of the connecting ring, and the inner wall of the cleaning block fits snugly against the spiral groove. Connecting plates are fixedly connected to both ends of the connecting ring, and one end of the connecting plate is fixedly connected to the bottom of the movable oil chamber.

[0014] Preferably, a hydraulic oil passage is provided at the center of the twist drill, and an inclined slide passage connected to the hydraulic oil passage is provided at the end of the spiral groove of the twist drill, and the sealing block is slidably disposed in the inclined slide passage.

[0015] Preferably, the drill bit cleaning assembly further includes a dust cover fixedly connected to the top of the connecting ring, and a dust collection box is movably engaged at the bottom of one side of the dust cover.

[0016] Preferably, one end of the sealing block extends into and matches the outer wall of the spiral groove.

[0017] Preferably, the dust cover is provided with a guide plate to guide debris inside the spiral groove into the dust collection box.

[0018] Preferably, the oil supply pipe has oil outlets on both sides of one end located in the movable oil chamber for discharging hydraulic oil.

[0019] Preferably, a second piston is fixedly connected to one end of the oil supply pipe located inside the movable oil chamber to allow hydraulic oil to enter the movable oil chamber and lift it.

[0020] Preferably, the connection point between the connecting ring and the cleaning block is provided with balls at equal angles to assist the rotation of the cleaning block.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. When the twist drill begins its initial pre-rotation, the connecting end continuously applies downward pressure, causing the first spring to deform under compression, thus initially compressing the hydraulic oil in the first oil chamber. At this time, the hydraulic oil undergoes initial pressure relief through the oil supply pipes fixedly connected to the outer walls on both sides of the first oil chamber. When the hydraulic oil in the first oil chamber is discharged through the oil outlet of the oil supply pipe, it enters the space between the second piston and the top of the movable oil chamber. As hydraulic oil is continuously injected, the pressure in this space gradually increases, thereby lifting the movable oil chamber. The movable oil chamber, through the connecting plates fixedly connected to both ends of the connecting ring, drives the connecting ring to move upward from the bottom of the spiral groove of the twist drill, gradually squeezing and accumulating the remaining debris in the spiral groove. When the debris accumulates to the threshold of the movable oil chamber's lifting, the twist drill begins drilling. During the drilling process, the dust baffle fixedly connected to the top of the connecting ring prevents the debris cleaned out of the spiral groove by the dust removal block from splashing everywhere. Meanwhile, the guide vanes inside the dust cover guide the debris to the entrance of the dust collection box that is attached to the bottom of one side of the dust cover, so that the debris can fall smoothly into the dust collection box for collection, which facilitates the subsequent centralized treatment of the debris.

[0023] 2. When the twist drill passes through the workpiece, the workpiece is released from contact with the drill bit, and the pressure on the first spring at the connecting end is significantly released. At this time, the first spring forces the oil in the first oil chamber through the hydraulic oil passage opened in the center of the twist drill to the end of the twist drill. The end of the twist drill's spiral groove is provided with an inclined slide that communicates with the hydraulic oil passage. The sealing block, which is slidably set in the inclined slide, extends out under the pressure of the hydraulic oil. Since the end of the sealing block fits and matches the outer wall of the spiral groove, it can fit and seal the end of the spiral groove, thereby greatly reducing the amount of residual debris in the spiral groove entering the workpiece cavity. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the vertical-horizontal composite machine tool of the present invention.

[0025] Figure 2 This is a schematic diagram of the overall structure of the drill bit of the present invention.

[0026] Figure 3 This is a schematic diagram of the overall structure of the drill bit of the present invention from another angle.

[0027] Figure 4 This is a schematic diagram of the cleaning state of the drill bit cleaning structure of the present invention.

[0028] Figure 5 This is a schematic diagram of the drill bit cleaning structure of the present invention from another angle, showing the cleaning state.

[0029] Figure 6 This is a schematic diagram showing the cleaning state of the drill bit cleaning structure and the removal state of the ash collection box in this invention.

[0030] Figure 7 This is an internal cross-sectional view of some components of the drill bit cleaning structure of the present invention.

[0031] Figure 8 for Figure 3 An enlarged schematic diagram of the structure at point A.

[0032] Figure 9 for Figure 6 Enlarged schematic diagram of the structure at point B.

[0033] In the diagram: 1. Horizontal machine tool; 2. Vertical machine tool; 3. Connecting end; 4. Twist drill; 401. Hydraulic oil passage; 5. First oil chamber; 6. First spring; 7. First piston; 8. Oil supply pipe; 801. Oil outlet; 802. Second piston; 9. Movable oil chamber; 10. Connecting plate; 11. Dust baffle; 12. Connecting ring; 13. Sealing block; 14. Dust collection box; 15. Dust cleaning block. Detailed Implementation

[0034] 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.

[0035] Please see Figures 1 to 9 The present invention provides a technical solution: a high-speed CNC gantry vertical and horizontal drilling and milling composite machine tool, including a horizontal machine tool 1, a vertical machine tool 2 set in the middle of the horizontal machine tool 1, a connecting end 3 set in the output end of the vertical machine tool 2, and a twist drill 4 movably clamped to the bottom of the connecting end 3. The twist drill 4 also includes a first oil cavity 5 sleeved outside the twist drill 4.

[0036] The first piston 7 is disposed in the first oil chamber 5 and blocks the top of the first oil chamber 5;

[0037] The first spring 6 has its two ends connected to the bottom of the connecting end 3 and the top of the first piston 7, respectively;

[0038] A debris blocking assembly is slidably installed at the end of the spiral groove of the twist drill 4 and pushed out based on the oil to seal the end of the spiral groove;

[0039] A drill bit cleaning assembly that is mounted on twist drill 4 and uses hydraulic oil diversion to lift and clean debris from the spiral groove;

[0040] The debris blocking assembly includes a sealing block 13 that is slidably disposed at the end of the spiral groove of the twist drill 4 at an angle;

[0041] The drill bit cleaning assembly includes an oil supply pipe 8 fixedly connected to the outer walls of both sides of the first oil chamber 5, a movable oil chamber 9 sleeved at the end of the oil supply pipe 8, and a connecting ring 12 sleeved on the twist drill 4. A dust removal block 15 is rotatably arranged at the center of the connecting ring 12. The inner wall of the dust removal block 15 fits snugly against the spiral groove. Connecting plates 10 are fixedly connected to both ends of the connecting ring 12. One end of the connecting plate 10 is fixedly connected to the bottom of the movable oil chamber 9.

[0042] In this embodiment, when the workpiece to be drilled (which can be a tubular workpiece or a workpiece containing a cavity) is placed on the worktable shared by the vertical machine tool 2 and the horizontal machine tool 1, the connecting end 3 of the vertical machine tool 2 is pressed down, causing the twist drill 4, which is movable and engaged at the end of the connecting end 3, to abut against the position on the workpiece where drilling is required. Subsequently, the twist drill 4 begins to pre-rotate, while the connecting end 3 applies downward pressure. During the pressure application process, the first spring 6 is compressed. Because the drill bit of the twist drill 4 abuts against the workpiece, when the first spring 6 is compressed, it pushes the first piston 7 to initially squeeze the hydraulic oil into the first oil chamber 5, causing the hydraulic oil to undergo initial diversion and pressure relief through the oil supply pipe 8 (it should be noted that the first oil chamber 5, the oil supply pipe 8, and the movable oil chamber 9 are all pre-filled with hydraulic oil). When the hydraulic oil in the first oil chamber 5 enters the movable oil chamber 9 through the oil supply pipe 8, the movable oil chamber 9 begins to move upward due to the increase in oil, and drives the connecting ring 12 to move upward from the bottom of the spiral groove of the twist drill 4 through the connecting plate 10. Next, the cleaning block 15, which is rotatably installed inside the connecting ring 12, gradually pushes and accumulates the remaining debris in the spiral groove upwards along the direction of the spiral groove. When the debris accumulates to the threshold of the lifting of the active oil chamber 9, the pre-rotation of the twist drill 4 ends, and the formal drilling work begins. At this time, the accumulated debris is collected by the dust collection component at the top of the connecting ring 12, in conjunction with the centrifugal force generated by the rotation of the twist drill 4 (it should be noted that the cleaning block 15 matches the spiral groove and is rotatably connected to the connecting ring 12, so the cleaning block 15 can rotate synchronously with the twist drill 4 during the dust removal process). When the twist drill 4 drills through the workpiece, the workpiece is released from contact with the drill bit, and the pressure of the connecting end 3 on the first spring 6 is greatly released. At this time, the first spring 6 squeezes the oil in the first oil chamber 5 through the oil passage in the twist drill 4 to the end of the twist drill 4. At this time, the sealing block 13, which is slidably set in the spiral groove at the end of the twist drill 4, extends out under the pressure of hydraulic oil, adheres to and seals the end of the spiral groove, thereby greatly reducing the amount of residual debris in the spiral groove from entering the workpiece cavity. (It should be noted that the oil in the oil passage of the twist drill 4 is also in a state of being filled without pushing out the sealing block 13. The reason for greatly reducing the amount of debris entering the workpiece cavity is that if only a small amount of debris enters the cavity during the drilling process, this small amount of debris will not be as widely dispersed as most debris. They tend to be concentrated near the entrance of the cavity or in a relatively open and easily accessible area, so they are relatively easy to clean. They can be cleaned quickly and easily using conventional small cleaning tools, such as small brushes or simple vacuum cleaners. At the same time, the small amount of debris left on the workpiece surface or scattered on the machine tool worktable is concentrated and easily accessible. It can be quickly dealt with by simply sweeping with a brush or vacuuming with a vacuum cleaner, without causing too much negative impact on the production process and workpiece quality.)

[0043] A hydraulic oil passage 401 is provided in the center of the twist drill 4, and an inclined slide passage connected to the hydraulic oil passage 401 is provided at the end of the spiral groove of the twist drill 4. The sealing block 13 is slidably disposed in the inclined slide passage.

[0044] In this embodiment, the oil passage consists of a hydraulic oil passage 401 and an inclined slide. When the twist drill 4 passes through the workpiece, the workpiece is released from contact with the drill bit, and the pressure of the connecting end 3 on the first spring 6 is significantly released. At this time, the first spring 6 squeezes the oil in the first oil chamber 5 through the hydraulic oil passage 401 in the twist drill 4 to the end of the twist drill 4. Under the action of the hydraulic oil, the sealing block 13, which is slidably set in the inclined slide, extends out, fits and seals the end of the spiral groove, thereby greatly reducing the amount of debris remaining in the spiral groove entering the workpiece cavity. (It should be noted that after completing a drilling operation and the twist drill 4 is lifted upward to detach from the workpiece, as the connecting end 3 continues to move upward, the first spring 6 further relaxes, and its upward elastic force pushes the first piston 7 to move upward in the first oil chamber 5, so that a negative pressure is formed in the first oil chamber 5. This negative pressure is transmitted to the movable oil chamber 9 through the oil supply pipe 8, causing the hydraulic oil in the movable oil chamber 9 to flow back. As the oil in the movable oil chamber 9 decreases, the movable oil chamber 9 is subjected to gravity and oil backflow.) Under the pressure difference, it moves downward, and then drives the connecting ring 12 to move downward along the spiral groove of the twist drill 4 through the connecting plate 10. At the same time, the hydraulic oil in the hydraulic oil passage 401 inside the twist drill 4 is reduced in pressure and flows back under the suction of the negative pressure in the first oil chamber 5. When the oil pressure in the hydraulic oil passage 401 is insufficient to support the sealing block 13 to remain in the extended state, the sealing block 13 slides inward along the inclined slide under the combined action of its own weight and the reverse force generated by the inclined slide (because the inclined slide is inclined, after the oil pressure decreases, the side wall of the slide has a force that promotes the sealing block 13 to return to its original position), thus achieving reset and preparing for the next drilling operation.

[0045] The drill bit cleaning assembly also includes a dust cover 11 fixedly connected to the top of the connecting ring 12, and a dust collection box 14 is movably attached to the bottom of one side of the dust cover 11.

[0046] In this embodiment, the dust shield 11 is arranged in a ring around the outside of the twist drill 4. Its function is to prevent debris cleaned out of the spiral groove by the dust removal block 15 from splashing everywhere during the drilling process, thus providing a certain degree of shielding and guiding. At the same time, a dust collection box 14 is movably attached to the bottom of one side of the dust shield 11. The dust collection box 14 is used to collect the debris cleaned out of the spiral groove and guided down by the dust shield 11, facilitating subsequent centralized processing of the debris.

[0047] One end of the sealing block 13 extends into and fits against the outer wall of the spiral groove.

[0048] In this embodiment, one end of the sealing block 13 extends into contact with the outer wall of the spiral groove. This contact design ensures that when the sealing block 13 extends out, a tight seal is formed between it and the outer wall of the spiral groove, preventing residual debris in the spiral groove from entering the workpiece cavity to the greatest extent.

[0049] The dust cover 11 is equipped with a guide plate to guide debris inside the spiral groove into the dust collection box 14.

[0050] In this embodiment, to guide debris into the ash collection box 14 more efficiently, a guide vane is provided inside the ash baffle 11. The guide vane is inclined at a certain angle, and its inclination direction is adapted to the movement direction of the debris being cleaned out of the spiral groove. This allows the debris to be better guided to the entrance of the ash collection box 14. At the same time, the ash collection box 14 is used to collect the debris that has been cleaned out of the spiral groove and guided down by the guide vane inside the ash baffle 11, facilitating subsequent centralized processing of the debris.

[0051] The oil supply pipe 8 is located in the movable oil chamber 9 and has oil outlets 801 on both sides for hydraulic oil to be discharged.

[0052] The oil supply pipe 8 is fixedly connected to a second piston 802 at one end inside the movable oil chamber 9 so that hydraulic oil can enter the movable oil chamber 9 and lift the movable oil chamber 9.

[0053] In this embodiment, when hydraulic oil is discharged from the outlet 801 of the oil supply pipe 8, it enters the space between the second piston 802 and the top of the movable oil chamber 9 (the second piston 802 is in a fixed state). Therefore, as hydraulic oil is continuously injected, the pressure in this space gradually increases, thereby lifting the movable oil chamber 9.

[0054] At the connection point between the connecting ring 12 and the dust removal block 15, ball bearings that assist in the rotation of the dust removal block 15 are arranged at equal angles.

[0055] In this embodiment, the equiangular distribution of the ball bearings ensures that the cleaning block 15 experiences uniform force during rotation. Regardless of its rotational position, the cleaning block 15 receives uniform support and assistance from the ball bearings, preventing rotational jamming or misalignment caused by uneven force. This not only improves the rotational stability of the cleaning block 15 but also ensures consistent cleaning performance, allowing for a comprehensive and thorough cleaning of the spiral grooves of the twist drill 4. (For example, when the twist drill 4 drills a workpiece, as the drilling depth increases, a large amount of chips and impurities gradually accumulate in the spiral grooves. When the connecting ring 12 moves the cleaning block 15 upwards, the cleaning block 15 rotates smoothly with the assistance of the ball bearings, gradually squeezing the chips and impurities in the spiral grooves upwards. The equiangularly distributed ball bearings ensure that the cleaning block 15 maintains a stable rotational state throughout the cleaning process, preventing any incomplete cleaning in certain areas.)

[0056] Working principle: When using this high-speed CNC gantry milling and drilling composite machine, firstly, place the workpiece to be drilled (which can be a tubular workpiece or a workpiece containing a cavity) stably on the worktable shared by the vertical machine tool 2 and the horizontal machine tool 1. Then, start the vertical machine tool 2, causing the connecting end 3 of the vertical machine tool 2 to slowly press down, allowing the twist drill 4, which is movable and engaged at the end of the connecting end 3, to precisely contact the position on the workpiece where drilling is required. At this time, the twist drill 4 begins to pre-rotate, while the connecting end 3 continues to apply downward pressure.

[0057] During the pressure application process, the first spring 6 is deformed by compression. Because the drill bit of the twist drill 4 is in close contact with the workpiece, the compressive force on the first spring 6 pushes the first piston 7 into the first oil chamber 5, thus initially compressing the hydraulic oil within the first oil chamber 5. At this time, the hydraulic oil is initially diverted and depressurized through the oil supply pipe 8, which is fixedly connected to the outer walls on both sides of the first oil chamber 5. One end of the oil supply pipe 8, located within the movable oil chamber 9, has outlets 801 on both sides for discharging hydraulic oil, and this end is fixedly connected to the second piston 802. When the hydraulic oil in the first oil chamber 5 is discharged through the outlets 801 of the oil supply pipe 8, it enters the space between the second piston 802 and the top of the movable oil chamber 9. As hydraulic oil is continuously injected, the pressure in this space gradually increases, thereby lifting the movable oil chamber 9. The movable oil chamber 9 begins to move upwards due to the increased oil volume, and through the connecting plates 10 fixedly connected to both ends of the connecting ring 12, it drives the connecting ring 12 to move upwards from the bottom of the spiral groove of the twist drill 4. At the connection point between the connecting ring 12 and the cleaning block 15, ball bearings are evenly distributed to assist the rotation of the cleaning block 15. These ball bearings ensure that the cleaning block 15 is subjected to uniform force during rotation. The cleaning block 15, which is rotated inside the connecting ring 12, rotates smoothly with the assistance of the ball bearings along the direction of the spiral groove, gradually squeezing and accumulating the residual debris in the spiral groove upwards.

[0058] When the debris accumulates to the threshold of the lifting of the active oil chamber 9, the pre-rotation of the twist drill 4 ends, and the formal drilling work begins. During the drilling process, the dust baffle 11, which is fixedly connected to the top of the connecting ring 12, surrounds the outside of the twist drill 4 in a ring shape to prevent the debris cleaned out of the spiral groove by the dust removal block 15 from splashing everywhere. At the same time, the dust baffle 11 is provided with a guide plate to guide the debris inside the spiral groove into the dust collection box 14. The guide plate is set at a certain angle, and its tilt direction is adapted to the movement direction of the debris being cleaned out of the spiral groove. This can better guide the debris to the entrance of the dust collection box 14, which is movably engaged at the bottom of one side of the dust baffle 11, so that the debris falls smoothly into the dust collection box 14 for collection, which is convenient for subsequent centralized processing of the debris.

[0059] When the twist drill 4 passes through the workpiece, the workpiece is released from contact with the drill bit, and the pressure on the first spring 6 at the connecting end 3 is greatly released. At this time, the first spring 6 squeezes the oil in the first oil chamber 5 through the hydraulic oil passage 401 opened in the center of the twist drill 4 to the end of the twist drill 4. The end of the spiral groove of the twist drill 4 is provided with an inclined slide that is connected to the hydraulic oil passage 401. The sealing block 13, which is slidably set in the inclined slide, extends out under the pressure of the hydraulic oil. Since the end of the sealing block 13 extends into contact with the outer wall of the spiral groove, it can fit and seal the end of the spiral groove, thereby greatly reducing the amount of debris remaining in the spiral groove from entering the workpiece cavity.

[0060] After completing a drilling operation, the twist drill 4 is lifted upwards and detached from the workpiece. As the connecting end 3 continues to move upwards, the first spring 6 further relaxes, and its upward elastic force pushes the first piston 7 upwards within the first oil chamber 5, creating a negative pressure within the first oil chamber 5. This negative pressure is transmitted to the movable oil chamber 9 through the oil supply pipe 8, causing the hydraulic oil in the movable oil chamber 9 to flow back. As the oil in the movable oil chamber 9 decreases, the movable oil chamber 9 moves downwards under the action of gravity and the pressure difference generated by the oil backflow, thereby driving the connecting ring 12 to move downwards along the spiral groove of the twist drill 4 via the connecting plate 10. At the same time, the hydraulic oil in the hydraulic oil passage 401 inside the twist drill 4 is depressurized and flows back under the suction effect of the negative pressure in the first oil chamber 5. When the oil pressure in the hydraulic oil passage 401 is insufficient to support the sealing block 13 in the extended state, the sealing block 13 slides inward along the inclined slide under the combined action of its own weight and the reverse force generated by the inclined slide (because the inclined slide is inclined, after the oil pressure decreases, the side wall of the slide has a force that causes the sealing block 13 to return to its original position), thus achieving reset and preparing for the next drilling operation.

[0061] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A high-speed CNC gantry milling and drilling composite machine tool, comprising a horizontal machine tool (1), a vertical machine tool (2) disposed in the center of the horizontal machine tool (1), a connecting end (3) disposed at the output end of the vertical machine tool (2), and a twist drill (4) movably latched to the bottom of the connecting end (3), characterized in that: The twist drill (4) also includes a first oil cavity (5) sleeved outside the twist drill (4); The first piston (7) is disposed in the first oil chamber (5) and blocks the top of the first oil chamber (5); The first spring (6) has its two ends connected to the bottom of the connecting end (3) and the top of the first piston (7), respectively. A debris blocking assembly is installed at the end of the spiral groove of the twist drill (4) based on oil to block the end of the spiral groove. A drill bit cleaning assembly that is mounted on a twist drill (4) and uses hydraulic oil diversion to lift and clean debris from the spiral groove; The debris blocking assembly includes a sealing block (13) that is slidably disposed at the end of the spiral groove of the twist drill (4). The drill bit cleaning assembly includes an oil delivery pipe (8) fixedly connected to the outer walls of both sides of the first oil chamber (5), a movable oil chamber (9) sleeved at the end of the oil delivery pipe (8), and a connecting ring (12) sleeved on the twist drill (4). A cleaning block (15) is rotatably arranged at the center of the connecting ring (12). The inner wall of the cleaning block (15) fits snugly against the spiral groove. A connecting plate (10) is fixedly connected to both ends of the connecting ring (12). One end of the connecting plate (10) is fixedly connected to the bottom of the movable oil chamber (9).

2. The high-speed CNC gantry vertical and horizontal drilling and milling composite machine tool according to claim 1, characterized in that: A hydraulic oil passage (401) is provided in the center of the twist drill (4), and an inclined slide passage connected to the hydraulic oil passage (401) is provided at the end of the spiral groove of the twist drill (4). The sealing block (13) is slidably disposed in the inclined slide passage.

3. A high-speed CNC gantry vertical and horizontal drilling and milling composite machine tool according to claim 1, characterized in that: The drill bit cleaning assembly also includes a dust cover (11) fixedly connected to the top of the connecting ring (12), and a dust collection box (14) is movably attached to the bottom of one side of the dust cover (11).

4. A high-speed CNC gantry vertical and horizontal drilling and milling composite machine tool according to claim 2, characterized in that: One end of the sealing block (13) extends into contact with and matches the outer wall of the spiral groove.

5. A high-speed CNC gantry vertical and horizontal drilling and milling composite machine tool according to claim 3, characterized in that: The dust cover (11) is provided with a guide plate to guide the debris inside the spiral groove into the dust collection box (14).

6. A high-speed CNC gantry milling and drilling composite machine tool according to claim 1, characterized in that: The oil pipe (8) located in the movable oil chamber (9) has oil outlets (801) on both sides of one end for hydraulic oil to be discharged.

7. A high-speed CNC gantry vertical and horizontal drilling and milling composite machine tool according to claim 6, characterized in that: The oil supply pipe (8) is fixedly connected to a second piston (802) at one end inside the movable oil chamber (9) so that hydraulic oil can enter the movable oil chamber (9) to lift the movable oil chamber (9).

8. A high-speed CNC gantry vertical and horizontal drilling and milling composite machine tool according to claim 1, characterized in that: At the connection point between the connecting ring (12) and the cleaning block (15), ball bearings that assist the rotation of the cleaning block (15) are arranged at equal angles.

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