Low-vibration high-precision CNC milling machine tool

Abstract

The application relates to the technical field of milling equipment, and provides a low-vibration high-precision CNC milling machine tool, which comprises a base, a moving seat one is fixedly connected to the top side of the middle part of the base, a moving seat two is installed at the top of the moving seat one, a T-shaped workbench is installed at the top of the moving seat two, a positioning assembly is installed in the T-shaped groove of the T-shaped workbench, a top frame is fixedly connected to the top of the periphery of the base, cleaning assemblies for blowing off the debris on the surface of the workbench are arranged on the two sides of the top frame, collecting assemblies are arranged on the two sides of the moving seat one, and the collecting assemblies are used for collecting the cleaned debris. The radial contraction linkage mechanism is used to automatically gather the blowing hose along with the cutting feeding, supports multi-degree-of-freedom independent adjustment to eliminate blowing dead angles, and simultaneously links the timing of the cleaning and collecting assemblies, the debris is automatically put into the warehouse along with the airflow, manual cleaning is not needed, the cooling liquid flow is automatically increased or reduced along with the load, and the cooling effect and saving are considered.

Description

Technical Field

[0001] This invention relates to the field of milling equipment technology, specifically to a low-vibration, high-precision CNC milling machine tool. Background Technology

[0002] CNC milling machine tools are core equipment in precision manufacturing, widely used in high-precision machining of molds, aerospace components, and medical devices. With increasingly stringent requirements for machining accuracy, even micron-level or sub-micron-level errors can lead to part scrap. The main factors affecting CNC milling accuracy include vibrations between the tool and workpiece during cutting, thermal deformation caused by insufficient cooling of the cutting zone, and secondary cutting scratches caused by chip accumulation on the worktable.

[0003] Currently, the adjustment of machine tool coolant flow mainly relies on manual valves or independent electronic proportional valves. The coolant supply is completely disconnected from the cutting depth and cutting load. Operators must preset the flow rate based on experience, and it cannot be automatically adjusted according to changes in cutting load during machining. Excessive flow at shallow cuts results in waste and splashing, while insufficient flow at deeper cuts leads to tool overheating and accelerated wear. Regarding chip removal from the worktable, existing methods mostly involve manual sweeping or air gun blowing. Manual sweeping is labor-intensive and requires machine downtime, impacting production efficiency. Air guns require handheld operation, and the blowing direction is arbitrary, scattering chips everywhere and polluting the workshop environment. Some machine tools are equipped with automatic chip conveyors, but these can only collect chips that fall into the chip trough and are ineffective for chips scattered on the worktable surface. Therefore, a low-vibration, high-precision CNC milling machine tool is needed. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a low-vibration, high-precision CNC milling machine tool, which solves the problems of dead angles in the cutting zone due to fixed blowing angles, reliance on manual operation for chip cleaning and collection, and the inability to coordinate the coolant flow rate with the cutting depth.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A low-vibration, high-precision CNC milling machine tool, comprising: The base has a movable seat one fixedly connected to the top side of the middle part of the base, a movable seat two installed on the top of the movable seat one, a T-shaped worktable installed on the top of the movable seat two, and a positioning component installed in the T-shaped groove of the T-shaped worktable. The top frame is fixedly connected to the top of the base around the perimeter. Cleaning components for blowing away debris from the surface of the workbench are provided on both sides of the top frame. Collection components are provided on both sides of the movable base for collecting the debris from the cleaning process. The lifting seat is installed on the rear side of the top of the base. A threaded rod driven by a motor is installed in the middle of the interior of the lifting seat. A lifting frame is threaded to the outer wall of the threaded rod for driving the milling cutter to move up and down along the Z-axis. A milling cutter holder is fixedly connected to the front side of the lifting frame. A milling cutter seat is installed in the middle of the milling cutter holder through a fixed bracket. An adjustable bracket assembly is provided on the outer wall of the milling cutter seat for installing a blower hose and adjusting its air outlet angle to assist in chip removal during processing and to blow away debris from the worktable during cleaning. A cooling tank is located on the rear side of the lifting seat. The output end of the cooling tank is connected to the milling cutter holder through a valve assembly and is used to deliver coolant to the milling cutter to reduce the cutting temperature. The drive cylinders are installed on both sides inside the lifting seat. The piston rods at the top of the two drive cylinders are connected to the lifting frame. The drive end of the left drive cylinder is connected to multiple sub-cylinders through a hose to drive the cleaning and collecting components. The right drive cylinder is divided into two drive paths through a T-junction. One of the output ends of the path is connected to sub-cylinder 2 to drive the positioning and adjusting components. The other output end of the path is connected to sub-cylinder 3 to drive the support assembly.

[0006] Preferably, the support assembly includes a connecting frame located at the top of the inner wall of the milling cutter holder. The outer wall of the connecting frame is connected to the drive end of the third cylinder. The connecting frame can be driven to move up and down vertically by the extension of the piston rod of the third cylinder. An annular guide rail is installed at the bottom of the connecting frame. Four connecting rods are provided on the outer wall of the annular guide rail. A movable rod is rotatably connected to the bottom of the connecting rod. A fixed frame is sleeved on the outer wall of the movable rod. An inclined groove is opened on the outer wall of the fixed frame from top to bottom towards the center of the milling cutter holder. A guide pin is fixedly connected to the outer wall of the movable rod and embedded in the inclined groove. A support is fixedly connected to the bottom connecting rod of the movable rod. A mounting frame is hinged to the bottom of the support. The mounting frame is used to install a blower hose for cleaning iron filings.

[0007] Preferably, each of the connecting rods three is in rolling engagement with the outer wall of the annular guide rail via a sliding wheel, allowing its position to be freely adjusted along the circumference of the annular guide rail. An annular groove is provided on the bottom side of the inner wall of the milling cutter holder, and a protrusion is fixedly connected to the bottom of the fixing frame. The protrusion is embedded in the annular groove and can slide therein, providing guidance and support when adjusting the circumferential position of the connecting rods three, ensuring the smooth movement and positioning accuracy of the blower hose during the circumferential adjustment process.

[0008] Preferably, the mounting bracket can swing up and down around the hinge axis of the support to adjust the air outlet pitch angle of the blower hose. In conjunction with the adjustment of the circumferential position of the connecting rod along the annular guide rail, independent adjustment of the blower hose in both circumferential and pitch degrees of freedom can be achieved.

[0009] Preferably, the positioning component includes a positioning frame mounted on the top worktable of the movable seat two. Two symmetrically arranged positioning blocks are slidably connected to the inner wall of the top of the positioning frame. An adjusting rod two is installed in the middle of the positioning frame. By rotating the adjusting rod two, the two positioning blocks can be driven to move closer to each other to center and clamp the workpiece. A fixing plate is installed on the inner wall of the two positioning blocks on the side with close proximity.

[0010] Preferably, one set of the second cylinders is disposed on the bottom side of the positioning block. The driving end of the second cylinder is slidably connected to a telescopic block. The outer wall of the telescopic block is hinged to a second connecting rod. The middle of the second connecting rod is rotatably connected to a lifting column. The outer wall of the lifting column is slidably connected to a fixed plate. The top of the lifting column is connected to the fixed plate through a wedge block. The extension of the telescopic block can drive the push block to extend and further clamp the workpiece to prevent vibration during processing. The push block is slidably connected to the positioning block through a fixed bracket and is provided with a spring for reset so that it automatically retracts when the clamping is released.

[0011] Preferably, the cleaning assembly includes an adjusting rod installed on the inner walls of both sides of the top frame. The outer wall of the adjusting rod is threaded with a movable block, and the bottom of the movable block is hinged with a fan compartment. One set of the sub-cylinders is installed on the inner wall of the rear side of the top frame. The driving end of the sub-cylinders is connected to the adjusting rod via a gear and rack to drive the fan compartment to move laterally along the top frame and blow clean the workbench surface in different areas.

[0012] Preferably, the collection assembly includes collection chambers fixedly connected to both sides of a movable base. A removable and tiltable debris collection box is slidably connected to the inner wall of each collection chamber. Another set of cylinders is installed on the inner wall of the collection chamber. The output end of the other set of cylinders is connected to a transmission rod via a gear and rack transmission. The end of the transmission rod is connected to a sliding rod via a gear transmission. The outer wall of the sliding rod is slidably connected to the collection chamber. A fixed sleeve is fitted onto the outer wall of the sliding rod. The outer wall of the fixed sleeve is fixedly connected to the collection chamber. A hinge seat is hinged to the end of the sliding rod. A cover plate is fixedly connected to the top of the hinge seat. A roller is provided at the top of the sliding rod. The right side of the roller is hinged to the sliding rod via a set of connecting rods, and the left side of the roller is hinged to the fixed sleeve via another set of connecting rods. Movement of the sliding rod can drive the cover plate to open laterally, allowing debris to fall into the collection chamber.

[0013] Preferably, the valve assembly includes a blade rotatably connected to the inner wall of the top of the cooling tank, a valve stem fixedly connected to the middle of the blade, a drive frame connected to the outer wall of the valve stem via a gear and rack, and the drive end of the second cylinder connected to the drive frame, so that the valve stem can be rotated by the extension and retraction of the second cylinder, thereby driving the blade to adjust the opening degree and achieving precise control of the coolant flow rate.

[0014] Preferably, the first movable seat can drive the second movable seat to move along the X-axis direction via a motor-driven guide rail, and the second movable seat can drive the worktable to move along the Y-axis direction via a motor-driven guide rail, cooperating with the Z-axis movement of the lifting frame to realize three-axis linkage machining of the milling cutter relative to the workpiece.

[0015] Working principle: In the preparation stage, before processing begins, the operator places the workpiece to be processed on the T-shaped worktable of the second movable seat, rotates the second adjusting rod, and drives the two symmetrically arranged positioning blocks to move closer to each other along the inner wall of the top of the positioning frame to center and clamp the workpiece.

[0016] During the milling process, the motor drives the threaded rod to rotate, and the threaded rod drives the lifting frame to feed downward along the lifting seat through the threaded engagement. The milling cutter holder and milling cutter seat fixed on the front side of the lifting frame descend synchronously. The milling cutter approaches the workpiece surface and begins cutting. The descent of the lifting frame will synchronously compress the drive cylinder, causing the transmission medium in the drive cylinder to enter the sub-cylinder to drive the components. The transmission medium is common hydraulic oil on the market, which has good incompressibility and flow stability. Hydraulic oil from one path enters cylinder two, driving the piston rod of cylinder two to extend. The driving end of cylinder two drives the valve rod to rotate through the drive frame and gear rack transmission. The valve rod drives the vane in the cooling tank to rotate, gradually increasing the valve opening. As the valve opening increases, the coolant flow rate increases accordingly, and more coolant is delivered to the milling cutter holder through the valve assembly to provide more thorough cooling for the milling cutter undergoing cutting. At the same time, another cylinder two drives the telescopic block to rise. The telescopic block drives the lifting column to slide upward along the fixed plate through the hinged connecting rod two. The wedge block at the top of the lifting column drives the push block to extend, applying auxiliary lateral thrust to the workpiece to further clamp the workpiece and prevent it from loosening due to vibration during processing.

[0017] Hydraulic oil from the other drive path of the right-side drive cylinder enters sub-cylinder three, causing the piston rod of sub-cylinder three to extend and push the connecting frame downwards vertically. The annular guide rail at the bottom of the connecting frame and the four connecting rods three descend synchronously. A fixed frame is fitted onto the outer wall of the movable rod rotatably connected to the bottom of each connecting rod three. The outer wall of the fixed frame has an inclined groove that slopes downwards towards the center of the milling cutter seat. As the connecting frame descends, the guide pin on the outer wall of the movable rod slides downwards along the inclined groove, driving the fixed frame to retract radially towards the center of the milling cutter seat. The air hose, mounted on the bottom of the movable rod via a support and mounting bracket, then approaches the milling cutter, concentrating the airflow towards the cutting area and promptly blowing chips away from the workpiece surface. Each connecting rod three is rolled against the outer wall of the annular guide rail via a sliding wheel, allowing the circumferential position of the air hose to be freely adjusted according to machining needs. The mounting bracket can tilt up and down around the hinge axis at the bottom of the support, adjusting the airflow tilt angle to achieve precise blowing of the cutting area and workpiece surface.

[0018] During the cleaning and collection phase, when processing is complete or the workbench needs cleaning, the motor drives the threaded rod to rotate in the opposite direction, causing the lifting frame to rise along the Z-axis and retract the tool. As the lifting frame rises, the piston rod of the drive cylinder moves upward, releasing the pressure inside the drive cylinder. The hydraulic oil in each sub-cylinder flows back to the drive cylinder, and all components reset synchronously. While the lifting frame rises, the hydraulic oil in the left drive cylinder drives multiple sub-cylinders to operate simultaneously via hoses. Among them, sub-cylinder one driving the collection component has the shortest path, so it starts before sub-cylinder one driving the cleaning component. Sub-cylinder one driving the collection component responds first. The output end of sub-cylinder one drives the transmission rod to rotate via a gear and rack transmission. The end of the transmission rod drives the sliding rod to move via a gear transmission. The sliding rod retracts and moves the cover plate on top of the hinge seat horizontally. At the same time, the rollers on the top of the sliding rod... Two sets of connecting rods retract and fold to lift the cover, causing it to flip open laterally. Simultaneously, another set of cylinders responds, its drive end retracts, and through gear and rack transmission, it drives the adjusting rod to rotate. The movable block, threaded to the outer wall of the adjusting rod, moves laterally along the top frame. The blower, hinged at the bottom of the movable block, moves accordingly, blowing and cleaning the workbench surface in different areas. The debris on the workbench is blown towards the collection chambers on both sides. The debris blown by the blower falls into the chip collection box in the collection chamber with the airflow. After cleaning, the lifting frame descends again to enter the next processing cycle. The hydraulic oil in the drive cylinder re-enters each cylinder, and the cover flips to close the sealed chamber opening. The operator can periodically pull the chip collection box out of the collection chamber, empty the debris, and put it back, achieving convenient cleaning and collection of debris.

[0019] This invention provides a low-vibration, high-precision CNC milling machine tool. It has the following beneficial effects: 1. The present invention uses a radial retraction linkage mechanism composed of a fixed frame inclined groove and a guide pin to automatically drive four blower hoses to retract and approach the center of the milling cutter seat when the lifting frame is descending for processing. The air force is concentrated and blown towards the cutting area, and the chips are blown away from the workpiece surface in time, preventing them from being rolled into the tool and causing secondary cutting scratches. When the tool is retracted, the blower hoses automatically return to their original position.

[0020] 2. This invention allows for independent adjustment of each blower hose in both circumferential and pitch directions by means of a connecting rod that can slide and adjust circumferentially along a circular guide rail, and a mounting frame that can tilt and swing around a support. Operators can flexibly adjust the airflow direction according to the workpiece shape and processing path, precisely blowing the cutting area from multiple directions and eliminating blind spots. At the same time, the cleaning and collection components can blow debris into the chip collection box in the collection chamber. Operators only need to periodically pull out and empty the chip collection box without having to enter the machine tool for cleaning, reducing labor intensity and maintaining the cleanliness of the processing environment.

[0021] 3. This invention achieves automatic matching of coolant flow rate and cutting depth through the mechanical-hydraulic linkage between the drive cylinder and the lifting frame. The deeper the lifting frame descends and the greater the cutting load, the greater the compression stroke of the drive cylinder, the more hydraulic oil enters the second cylinder, the greater the rotation angle of the valve stem and the vane, and the coolant flow rate automatically increases. When retracting the tool, the flow rate automatically decreases, ensuring sufficient cooling during heavy-load cutting and avoiding waste and splashing during light-load or tool retraction. Attached Figure Description

[0022] Figure 1 This is a perspective view of the present invention; Figure 2 This is a rear view diagram of the present invention; Figure 3 This is a schematic diagram of the lifting seat structure of the present invention; Figure 4 This is a schematic diagram of the top frame structure of the present invention; Figure 5 This is a schematic diagram of the collection chamber of the present invention; Figure 6 This is a schematic diagram of the cover plate structure of the present invention; Figure 7 This is a schematic diagram of the cooling tank structure of the present invention; Figure 8 This is a schematic diagram of the blade structure of the present invention; Figure 9 This is a schematic diagram of the positioning frame of the present invention; Figure 10 This is a schematic diagram of the positioning block structure of the present invention; Figure 11 This is a schematic diagram of the inner wall structure of the positioning block of the present invention; Figure 12 This is a schematic diagram of the milling cutter holder of the present invention; Figure 13 This is a schematic diagram of the support assembly structure of the present invention; Figure 14 This is a schematic diagram of the mounting bracket structure of the present invention.

[0023] The components are as follows: 1. Base; 2. Top frame; 3. Movable seat one; 4. Movable seat two; 5. Lifting seat; 6. Milling cutter holder; 7. Fan compartment; 8. Collection compartment; 9. Cooling tank; 10. Threaded rod one; 11. Lifting frame; 12. Drive cylinder; 13. Divider cylinder one; 14. Adjusting rod one; 15. Movable block; 16. Chip collection box; 17. Cover plate; 18. Transmission rod; 19. Hinge seat; 20. Sliding rod; 21. Fixed sleeve; 22. Connecting rod. 1. 23. Roller; 24. Second cylinder; 25. Drive frame; 26. Valve stem; 27. Blade; 28. Positioning frame; 29. ​​Positioning block; 30. Fixing plate; 31. Second adjusting rod; 32. Telescopic block; 33. Push block; 34. Second connecting rod; 35. Lifting column; 36. Third cylinder; 37. Mounting frame; 38. Connecting frame; 39. Circular guide rail; 40. Third connecting rod; 41. Fixing frame; 42. Support; 43. Movable rod. Detailed Implementation

[0024] 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. Example

[0025] This invention provides a low-vibration, high-precision CNC milling machine tool, comprising: Please see the appendix Figure 1 - Appendix Figure 3A movable seat 3 is fixedly connected to the top side of the middle of the base 1. A movable seat 4 is installed on the top of the movable seat 3. A T-shaped worktable is installed on the top of the movable seat 4. A positioning component is installed in the T-slot of the T-shaped worktable. A lifting seat 5 is installed on the rear top of the base 1. A threaded rod 10 driven by a motor is installed in the middle of the interior of the lifting seat 5. A lifting frame 11 is threadedly connected to the outer wall of the threaded rod 10 for driving the milling cutter to move up and down along the Z-axis. A milling cutter holder 6 is fixedly connected to the front side of the lifting frame 11. A milling cutter seat is installed in the middle of the milling cutter holder 6 through a fixed bracket. An adjustable bracket assembly is provided on the outer wall of the milling cutter seat for installing a blower hose and adjusting its air outlet angle to assist in chip removal during processing and to blow away debris from the worktable during cleaning. The movable seat 3 is electrically connected to the base 1. The motor-driven guide rail can drive the movable seat 2 4 to move along the X-axis. The movable seat 2 4 can drive the worktable to move along the Y-axis through the motor-driven guide rail. It cooperates with the Z-axis movement of the lifting frame 11 to realize the three-axis linkage machining of the milling cutter relative to the workpiece. The drive cylinder 12 is installed on both sides inside the lifting seat 5. The piston rods at the top of the two drive cylinders 12 are connected to the lifting frame 11. The drive end of the left drive cylinder 12 is connected to multiple sub-cylinders 13 through a hose, which is used to drive the cleaning component and the collection component. The right drive cylinder 12 is divided into two drive paths through a three-way valve. The output end of one path is connected to sub-cylinder 2 24, which is used to drive the positioning component and the adjustment component. The output end of the other path is connected to sub-cylinder 3 36, which is used to drive the support component.

[0026] Specifically, before processing begins, the operator places the workpiece to be processed on the T-shaped worktable of the movable seat 24, rotates the adjusting rod 21, and the two symmetrically arranged positioning blocks 29 move closer to each other along the inner top wall of the positioning frame 28 to center and clamp the workpiece. After the motor starts, the threaded rod 10 rotates to drive the lifting frame 11 to feed downward along the lifting seat 5. The milling cutter holder 6 and the milling cutter seat fixed on the front side of the lifting frame 11 descend synchronously. The milling cutter approaches the surface of the workpiece and begins cutting. At the same time as the lifting frame 11 descends, the drive cylinder 12 is compressed synchronously. The hydraulic oil in the drive cylinder 12 enters each sub-cylinder through the pipeline, driving the cooling, positioning, purging and collection components to work together in a preset sequence, realizing the full automation of the processing process.

[0027] Please see the appendix Figure 9 -Appendix Figure 11The positioning assembly includes a positioning frame 28 mounted on the top worktable of the movable seat 24. Two symmetrically arranged positioning blocks 29 are slidably connected to the inner wall of the top of the positioning frame 28. An adjusting rod 31 is installed in the middle of the positioning frame 28. By rotating the adjusting rod 31, the two positioning blocks 29 can be driven to move closer together to center and clamp the workpiece. Fixing plates 30 are installed on the inner walls of the adjacent sides of the two positioning blocks 29. One set of cylinders 24 is located on the bottom side of the positioning blocks 29, and the driving end of this set of cylinders 24 is slidably connected to... There is a telescopic block 32, and a connecting rod 34 is hinged to the outer wall of the telescopic block 32. A lifting column 35 is rotatably connected to the middle of the connecting rod 34. The outer wall of the lifting column 35 is slidably connected to the fixed plate 30. The top of the lifting column 35 is connected to the fixed plate 30 through a wedge block. The extension of the telescopic block 32 can drive the push block 33 to extend and further clamp the workpiece to prevent vibration during processing. The push block 33 is slidably connected to the positioning block 29 through a fixed bracket and is equipped with a spring for reset so that it automatically retracts when the clamping is released.

[0028] Specifically, during the preparation stage, after the operator places the workpiece on the T-shaped worktable, they rotate the adjusting rod 31 to drive the two positioning blocks 29 to slide towards each other along the inner wall of the top of the positioning frame 28. The fixing plate 30 fits against the two sides of the workpiece, completing the initial centering and clamping. When the lifting frame 11 descends for milling, the hydraulic oil in the drive cylinder 12 enters the sub-cylinder 24 through the right drive path. The piston rod of the sub-cylinder 24 extends, pushing the telescopic block 32 upward. When the telescopic block 32 rises, it drives the lifting frame through the hinged connecting rod 34. The lifting column 35 slides upward along the inner wall of the fixed plate 30. During the upward movement, the wedge-shaped block at the top of the lifting column 35 pushes the push block 33 outward to press against the side of the workpiece. This auxiliary clamping force automatically increases with the increase of the cutting depth. The deeper the cutting and the greater the vibration, the stronger the clamping force automatically becomes, effectively preventing the workpiece from loosening due to vibration during processing. After processing is completed, the lifting frame 11 rises, the pressure in the drive cylinder 12 is released, the hydraulic oil in the second cylinder 24 flows back, and the push block 33 automatically retracts under the action of the return spring, releasing the workpiece for easy removal.

[0029] Please see the appendix Figure 7 and attached Figure 8 Cooling tank 9 is located behind lifting seat 5. The output end of cooling tank 9 is connected to milling cutter seat through valve assembly to deliver coolant to milling cutter to reduce cutting temperature. Valve assembly includes blade 27 rotatably connected to the inner wall of top of cooling tank 9. Valve stem 26 is fixedly connected to the middle of blade 27. Drive frame 25 is connected to the outer wall of valve stem 26 through gear and rack. Drive end of sub-cylinder 24 is connected to drive frame 25 so that valve stem 26 is rotated by extension and retraction of sub-cylinder 24, thereby driving blade 27 to adjust opening degree and achieve precise control of coolant flow.

[0030] Specifically, when the lifting frame 11 descends for milling, the hydraulic oil in the right drive cylinder 12 enters the second sub-cylinder 24 through the three-way valve. The drive end of the second sub-cylinder 24 pushes the drive frame 25 to move. The drive frame 25 drives the valve stem 26 to rotate through the gear and rack transmission. The valve stem 26 drives the vane 27 in the cooling tank 9 to rotate and open. The deeper the lifting frame 11 descends, the deeper the milling cutter cuts into the workpiece, the greater the cutting load, and the more cutting heat is generated. At this time, the stroke of the drive cylinder 12 is compressed, and more hydraulic oil enters the second sub-cylinder 24. The longer the piston rod extends, the greater the angle at which the valve stem 26 and the vane 27 rotate via the drive frame 25 and the gear rack, resulting in a larger valve opening and a corresponding increase in coolant flow. More coolant is delivered to the milling cutter holder through the valve assembly, providing more thorough cooling for the milling cutter undergoing heavy-duty cutting. When the lifting frame 11 rises and retracts the cutter, the pressure inside the drive cylinder 12 is released, the hydraulic oil flows back, and the vane 27 rotates in the opposite direction to close the valve, automatically reducing the coolant flow and preventing waste and splashing caused by the continued high-flow-rate spraying of coolant after the cutter retracts.

[0031] Please see the appendix Figure 12 -Appendix Figure 14 The support assembly includes a connecting frame 38 located at the top of the inner wall of the milling cutter holder 6. The outer wall of the connecting frame 38 is connected to the drive end of the cylinder 36. The connecting frame 38 can be driven to rise and fall vertically by the extension of the piston rod of the cylinder 36. An annular guide rail 39 is installed at the bottom of the connecting frame 38. Four connecting rods 40 are provided on the outer wall of the annular guide rail 39. A movable rod 43 is rotatably connected to the bottom of the connecting rods 40. A fixed frame 41 is sleeved on the outer wall of the movable rod 43. The outer wall of the fixed frame 41 has a sloping groove that slopes from top to bottom towards the center of the milling cutter holder. A guide pin embedded in the sloping groove is fixedly connected to the outer wall of the movable rod 43. A support 42 is fixedly connected to the bottom of the movable rod 43. A mounting frame 37 is hinged to the bottom of the support 42. The mounting frame 37 is used to install a blower. The hose is used to clean iron filings. Each connecting rod 3 40 is rolled with the outer wall of the annular guide rail 39 through a sliding wheel, and its position can be freely adjusted along the circumference of the annular guide rail 39. The inner wall of the milling cutter holder 6 has an annular groove on the bottom side. The bottom of the fixing frame 41 is fixedly connected to a protrusion, which is embedded in the annular groove and can slide therein. It is used to provide guidance and support when adjusting the circumferential position of the connecting rod 3 40, so as to ensure the smooth movement and positioning accuracy of the blower hose during the circumferential adjustment process. The mounting frame 37 can swing up and down around the hinge axis of the support 42 to adjust the air outlet pitch angle of the blower hose. In conjunction with the adjustment of the circumferential position of the connecting rod 3 40 along the annular guide rail 39, the independent adjustment of the blower hose in two degrees of freedom, circumferential and pitch, can be achieved.

[0032] Specifically, when the lifting frame 11 descends for milling, the hydraulic oil in the right drive cylinder 12 enters the sub-cylinder 36 through the three-way valve. The piston rod of the sub-cylinder 36 extends, pushing the connecting frame 38 to descend vertically. The annular guide rail 39 at the bottom of the connecting frame 38 and the four connecting rods 40 descend synchronously. The movable rod 43 rotatably connected to the bottom of each connecting rod 40 moves down accordingly. The guide pin on the outer wall of the movable rod 43 slides down along the inclined groove on the outer wall of the fixed frame 41. Since the inclined groove is inclined from top to bottom towards the center of the milling cutter seat, the guide pin drives the fixed frame 41 to retract radially towards the center of the milling cutter seat during the downward movement. The protrusion at the bottom of the fixed frame 41 slides smoothly in the annular groove on the bottom side of the inner wall of the milling cutter holder 6, ensuring the straightness and stability of the radial retraction. The blower hose installed at the bottom of the movable rod 43 through the support 42 and the mounting bracket 37 approaches the milling cutter, and the air force is more concentrated and blown towards the cutting area, blowing the chips away from the workpiece surface in time and preventing chip damage. The chipping between the cutting tool and the workpiece causes secondary cutting damage to the machined surface. The operator can manually adjust the circumferential position of each connecting rod 3 40 along the annular guide rail 39 according to the processing needs. The connecting rod 3 40 rolls with the outer wall of the annular guide rail 39 through the sliding wheel. When adjusting, pushing the connecting rod 3 40 will make it slide along the guide rail to the desired position. The mounting bracket 37 can swing up and down around the hinge axis at the bottom of the support 42 to adjust the air outlet pitch angle of the blower hose. Through the independent adjustment of the circumferential position and pitch angle, the four blower hoses can accurately blow the cutting area from different directions to ensure that the chips are removed in a timely and comprehensive manner. When the lifting frame 11 rises and the cutting tool is retracted after processing, the pressure in the drive cylinder 12 is released, the hydraulic oil in the sub-cylinder 3 36 flows back, the connecting frame 38 rises and resets under the return spring, the guide pin slides upward along the inclined groove, the drive fixing frame 41 resets radially outward, and the blower hose moves away from the milling tool to make room for the next round of processing or tool change.

[0033] Please see the appendix Figure 1 Appendix Figure 4 The top frame 2 is fixedly connected to the top of the base 1 around its perimeter. Cleaning components for blowing debris from the workbench surface are provided on both sides of the top frame 2. Collection components are provided on both sides of the movable seat 3 for collecting the debris. The cleaning components include adjusting rods 14 installed on the inner walls of both sides of the top frame 2. Movable blocks 15 are threaded to the outer walls of the adjusting rods 14. A blower compartment 7 is hinged to the bottom of the movable block 15. One set of cylinders 13 is installed on the inner wall of the rear side of the top frame 2. The drive end of the cylinders 13 is connected to the adjusting rods 14 through a gear and rack to drive the blower compartment 7 to move laterally along the top frame 2 to blow clean the workbench surface in different areas.

[0034] Specifically, when processing is completed or the worktable needs to be cleaned, the lifting frame 11 rises along the Z-axis and retracts the tool. The hydraulic oil in the left drive cylinder 12 drives the sub-cylinder 13 to move through the hose. The drive end of the sub-cylinder 13 drives the adjusting rod 14 to rotate through the gear and rack transmission. The movable block 15, which is threaded to the outer wall of the adjusting rod 14, moves laterally along the top frame 2. The blower chamber 7, which is hinged at the bottom of the movable block 15, moves from one end of the top frame 2 to the other end. The strong airflow generated by the blower covers the entire surface of the worktable, blowing the debris generated during processing from the center area of ​​the worktable to both sides, ensuring that the surface of the worktable is clean and ready for the next processing.

[0035] Please see the appendix Figure 5 and attached Figure 6 The collection assembly includes a collection chamber 8 fixedly connected to both sides of the movable base 3. A removable and tiltable chip collection box 16 is slidably connected to the inner wall of the collection chamber 8. Another set of cylinders 13 is installed on the inner wall of the collection chamber 8. The output end of the other set of cylinders 13 is connected to a transmission rod 18 via a gear and rack transmission. The end of the transmission rod 18 is connected to a sliding rod 20 via a gear transmission. The outer wall of the sliding rod 20 is slidably connected to the collection chamber 8. A fixed sleeve 21 is fitted on the outer wall of the sliding rod 20. The outer wall of the fixed sleeve 21 is fixedly connected to the collection chamber 8. A hinge seat 19 is hinged to the end of the sliding rod 20. A cover plate 17 is fixedly connected to the top of the hinge seat 19. A roller 23 is provided on the top of the sliding rod 20. The right side of the roller 23 is hinged to the sliding rod 20 via a set of connecting rods 22. The left side of the roller 23 is hinged to the fixed sleeve 21 via another set of connecting rods 22. The movement of the sliding rod 20 can drive the cover plate 17 to open laterally, allowing the debris to fall into the collection chamber 8.

[0036] Specifically, before the cleaning component is started, the cylinder 13 of the drive collection component responds first. The output end of the cylinder 13 drives the transmission rod 18 to rotate through the gear and rack transmission. The end of the transmission rod 18 drives the sliding rod 20 to move through the gear transmission. The sliding rod 20 retracts and drives the cover plate 17 on the top of the hinge seat 19 to move horizontally. At the same time, the roller 23 set on the top of the sliding rod 20 retracts and folds up through two sets of connecting rods 22, thereby causing the cover plate 17 to flip upward from the horizontal closed state and open the feed port of the collection chamber 8. After the cover plate 17 is opened in place, the cylinder 13 of the cleaning component then starts to operate, and the blower chamber 7 starts to blow. The debris falls into the chip collection box 16 in the collection chamber 8 through the open feed port with the airflow. After cleaning is completed, the lifting frame 11 descends again, the hydraulic oil flows back, and the cover plate 17 flips to close and seal the chamber opening. The operator can periodically pull out the chip collection box 16 from the collection chamber 8, empty the debris, and put it back, realizing convenient cleaning and collection of debris without having to enter the machine tool for cleaning.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-vibration, high-precision CNC milling machine tool, characterized in that, include: The base (1) has a movable seat one (3) fixedly connected to the top side of the middle part of the base (1), and a movable seat two (4) is installed on the top of the movable seat one (3). A T-shaped worktable is installed on the top of the movable seat two (4), and a positioning component is installed in the T-shaped groove of the T-shaped worktable. Top frame (2), the bottom of the top frame (2) is fixedly connected to the top of the base (1) around the perimeter, the top frame (2) is provided with cleaning components for blowing away debris from the surface of the workbench on both sides, and the movable seat (3) is provided with collecting components on both sides for collecting the debris from the cleaning. Lifting seat (5), the lifting seat (5) is installed on the top rear side of the base (1), the inner middle of the lifting seat (5) is equipped with a threaded rod (10) driven by a motor, the outer wall of the threaded rod (10) is threaded with a lifting frame (11) for driving the milling cutter to rise and fall along the Z axis, the front side of the lifting frame (11) is fixedly connected with a milling cutter frame (6), the middle of the milling cutter frame (6) is equipped with a milling cutter seat through a fixed bracket, the outer wall of the milling cutter seat is provided with an adjustable bracket assembly for installing a blower hose and adjusting its air outlet angle; Cooling tank (9) is located on the rear side of lifting seat (5). The output end of the cooling tank (9) is connected to the milling cutter seat through a valve assembly and is used to deliver coolant to the milling cutter to reduce the cutting temperature. The drive cylinder (12) is installed on both sides inside the lifting seat (5). The piston rods of the two drive cylinders (12) are connected to the lifting frame (11). The drive end of the drive cylinder (12) on the left is connected to multiple sub-cylinders (13) through a hose, which is used to drive the cleaning component and the collection component. The drive cylinder (12) on the right is divided into two drive paths through a three-way valve. One of the output ends of the path is connected to sub-cylinder (24), which is used to drive the positioning component and the valve component. The other output end of the path is connected to sub-cylinder (36), which is used to drive the support component. The support assembly includes a connecting frame (38) located at the top of the inner wall of the milling cutter holder (6). The outer wall of the connecting frame (38) is connected to the drive end of the cylinder three (36). The connecting frame (38) can be driven to rise and fall vertically by the piston rod of the cylinder three (36). A ring guide rail (39) is installed at the bottom of the connecting frame (38). Four connecting rods three (40) are provided on the outer wall of the ring guide rail (39). A movable rod (43) is rotatably connected to the bottom of the connecting rods three (40). A fixed frame (41) is sleeved on the outer wall of the movable rod (43). A groove inclined from top to bottom towards the center of the milling cutter holder is opened on the outer wall of the fixed frame (41). A guide pin embedded in the groove is fixedly connected to the outer wall of the movable rod (43). A support (42) is fixedly connected to the bottom connecting rod of the movable rod (43). A mounting frame (37) is hinged to the bottom of the support (42). The mounting frame (37) is used to install a blower hose for cleaning iron filings.

2. The low-vibration, high-precision CNC milling machine tool according to claim 1, characterized in that, Each of the connecting rods (40) rolls with the outer wall of the annular guide rail (39) via a sliding wheel, and its position can be freely adjusted along the circumference of the annular guide rail (39). The inner wall of the milling cutter holder (6) has an annular groove on its bottom side. The bottom of the fixing frame (41) is fixedly connected with a protrusion. The protrusion is embedded in the annular groove and can slide therein. It is used to provide guidance and support when adjusting the circumferential position of the connecting rods (40), and to ensure the smooth movement and positioning accuracy of the blower hose during the circumferential adjustment process.

3. The low-vibration, high-precision CNC milling machine tool according to claim 2, characterized in that, The mounting bracket (37) can swing up and down around the hinge axis of the support (42) to adjust the air outlet pitch angle of the blower hose. In conjunction with the adjustment of the circumferential position of the connecting rod three (40) along the annular guide rail (39), the blower hose can be independently adjusted in two degrees of freedom: circumferential and pitch.

4. The low-vibration, high-precision CNC milling machine tool according to claim 1, characterized in that, The positioning assembly includes a positioning frame (28) mounted on the top worktable of the movable seat (4). The inner wall of the top of the positioning frame (28) has two symmetrically arranged positioning blocks (29). An adjusting rod (31) is installed in the middle of the positioning frame (28). By rotating the adjusting rod (31), the two positioning blocks (29) can be driven to move closer to each other to center and clamp the workpiece. A fixing plate (30) is installed on the inner wall of the two positioning blocks (29) on the side with similar sides.

5. The low-vibration, high-precision CNC milling machine tool according to claim 4, characterized in that, One of the sub-cylinders (24) is located on the bottom side of the positioning block (29). The driving end of the sub-cylinder (24) is slidably connected to a telescopic block (32). The outer wall of the telescopic block (32) is hinged to a connecting rod (34). The middle part of the connecting rod (34) is rotatably connected to a lifting column (35). The outer wall of the lifting column (35) is slidably connected to the fixing plate (30). The top of the lifting column (35) is connected to the fixing plate (30) through a wedge block. The extension of the telescopic block (32) can drive the push block (33) to extend and further clamp the workpiece to prevent vibration during processing. The push block (33) is slidably connected to the positioning block (29) through a fixed bracket and is provided with a spring for reset so that it automatically retracts when the clamping is released.

6. The low-vibration, high-precision CNC milling machine tool according to claim 1, characterized in that, The cleaning assembly includes an adjusting rod (14) installed on the inner walls of both sides of the top frame (2). The outer wall of the adjusting rod (14) is threaded with a movable block (15). The bottom of the movable block (15) is hinged with a fan compartment (7). A set of the sub-cylinders (13) is installed on the inner wall of the rear side of the top frame (2). The driving end of the sub-cylinders (13) is connected to the adjusting rod (14) through a gear rack to drive the fan compartment (7) to move laterally along the top frame (2) to blow and clean the workbench surface in different areas.

7. The low-vibration, high-precision CNC milling machine tool according to claim 1, characterized in that, The collection assembly includes a collection chamber (8) fixedly connected to both sides of the movable seat (3). A removable and tiltable chip collection box (16) is slidably connected to the inner wall of the collection chamber (8). Another set of cylinders (13) is installed on the inner wall of the collection chamber (8). The output end of the other set of cylinders (13) is connected to a transmission rod (18) via a gear and rack transmission. The end of the transmission rod (18) is connected to a sliding rod (20) via a gear transmission. The outer wall of the sliding rod (20) is slidably connected to the collection chamber (8). A fixing sleeve (21) is fitted onto the outer wall of the sliding rod (20). The outer wall of the fixed sleeve (21) is fixedly connected to the collection chamber (8). The end of the sliding rod (20) is hinged to a hinge seat (19). The top of the hinge seat (19) is fixedly connected to a cover plate (17). The top of the sliding rod (20) is provided with a roller (23). The right side of the roller (23) is hinged to the sliding rod (20) through a set of connecting rods (22). The left side of the roller (23) is hinged to the fixed sleeve (21) through another set of connecting rods (22). The movement of the sliding rod (20) can drive the cover plate (17) to open laterally so that the debris can fall into the collection chamber (8).

8. The low-vibration, high-precision CNC milling machine tool according to claim 1, characterized in that, The valve assembly includes a blade (27) rotatably connected to the inner wall of the top of the cooling tank (9). A valve stem (26) is fixedly connected to the middle of the blade (27). A drive frame (25) is connected to the outer wall of the valve stem (26) via a gear and rack. The drive end of the second cylinder (24) is connected to the drive frame (25) so that the valve stem (26) can be rotated by the extension and retraction of the second cylinder (24), thereby driving the blade (27) to adjust the opening degree and achieve precise control of the coolant flow rate.

9. A low-vibration, high-precision CNC milling machine tool according to claim 1, characterized in that, The first movable seat (3) can drive the second movable seat (4) to move along the X-axis direction via a motor-driven guide rail. The second movable seat (4) can drive the worktable to move along the Y-axis direction via a motor-driven guide rail. This works in conjunction with the Z-axis movement of the lifting frame (11) to achieve three-axis linkage machining of the milling cutter relative to the workpiece.

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