High-speed high-precision vertical drilling and tapping device based on double-spindle cooperative control

Abstract

The invention discloses a high-speed and high-precision vertical drilling and tapping device based on double-spindle cooperative control, and relates to the field of machining equipment. The control plates are symmetrically arranged on the supporting plate; the pair of drill rod main bodies are respectively arranged on the opposite inner side surfaces of the pair of control plates; the mounting plate is arranged at the top of the supporting plate and located between the drill rod bodies, and a guide groove is formed in the mounting plate; and the liquid storage tank is movably arranged on the mounting plate and is matched with the guide groove. Through the synergistic effect of the liquid storage tank with the position capable of being flexibly adjusted and the liquid spraying assembly, efficient and uniform cooling and chip flushing for different machined parts are achieved, the quality of the machined surface is remarkably improved, and the service life of a tool is remarkably prolonged; through the clamping assembly in which the pressing plate is driven by the telescopic cylinder to be linked with the slidable top plate and the clamping plate, workpieces of different sizes can be rapidly and stably clamped, and the adaptability and the operation efficiency of the equipment are improved.

Description

Technical Field

[0001] This invention relates to the field of machining equipment, specifically to a high-speed, high-precision vertical drilling and tapping device based on dual-spindle collaborative control. Background Technology

[0002] In the field of mechanical manufacturing, drilling and tapping are key processes in the production of precision parts (such as molds, aerospace components, and electronic product housings). With the increasing demands for processing efficiency, precision, and automation in the manufacturing industry, vertical drilling and tapping centers capable of simultaneous multi-spindle operation have become widely used. Existing such equipment typically includes a frame, spindle system, worktable, and cooling and chip removal system. The dual-spindle design aims to improve production efficiency by synchronously or asynchronously controlling two spindles to achieve parallel or composite machining of workpieces. To ensure machining quality, the equipment is also generally equipped with workpiece clamping mechanisms, coolant supply devices, and simple cushioning structures designed to reduce the impact of spindle vibration.

[0003] However, in practical applications, existing high-speed, high-precision vertical drilling and tapping devices still have some shortcomings that need improvement. First, the layout of their cooling and chip removal systems is often relatively fixed. The coolant spray position and reservoir cannot be flexibly adjusted according to the workpiece size or machining position, resulting in uneven cooling and poor chip removal, affecting the surface finish and tool life. Second, the workpiece clamping mechanism is mostly integral or cumbersome to adjust, lacking adaptability for workpieces of different sizes or requiring multi-faceted machining, leading to low clamping efficiency. Furthermore, common vibration damping structures are relatively simple, offering limited suppression of the combined vibrations generated by the high-speed dual spindles, making it difficult to consistently guarantee the dynamic accuracy and coordinated motion stability of the dual spindles over the long term, thus hindering further improvements in machining accuracy. Summary of the Invention

[0004] Therefore, the purpose of this invention is to provide a high-speed, high-precision vertical drilling and tapping device based on dual-spindle collaborative control to solve the technical problem.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-speed, high-precision vertical drilling and tapping device based on dual-spindle collaborative control, comprising: a support plate; a pair of control plates symmetrically disposed on the support plate; a pair of drill rod bodies respectively disposed on the inner surfaces opposite to the pair of control plates; a mounting plate disposed on the top of the support plate and located between the pair of drill rod bodies, the mounting plate having a guide groove; a liquid storage tank movably disposed on the mounting plate and cooperating with the guide groove; an adjustment mechanism for driving the liquid storage tank to move along the guide groove to adjust its position; a liquid spraying assembly disposed on the top of the support plate for spraying liquid into the processing area; a clamping assembly disposed on the top of the support plate for clamping the workpiece; and a vibration damping device disposed on the top of the support plate for limiting the pair of drill rod bodies and buffering their rotational vibration.

[0006] The present invention is further configured such that the adjusting mechanism includes a threaded rod formed in the guide groove and a mounting block disposed at the top center of the mounting plate, the mounting block being energized and driven to rotate by the threaded rod, and the liquid storage tank being threadedly engaged with the threaded rod.

[0007] The present invention is further configured such that the spraying assembly includes a connector and a pair of spray pipes, the connector being disposed on the top of the support plate, and the pair of spray pipes being disposed side by side on the top of the connector and extending above the liquid storage tank.

[0008] The present invention is further configured such that a flushing tank is provided inside the liquid storage tank, a connection port is provided on one side of the flushing tank, a spray port communicating with the connection port is provided therein, and a drain port is provided on the side of the liquid storage tank away from the connection port.

[0009] The present invention is further configured such that the clamping assembly includes a connecting plate, a pressure plate, a telescopic cylinder, a pair of top plates, and a pair of clamping plates; the connecting plate is disposed on the top of the support plate, the pressure plate is disposed below the connecting plate, the telescopic cylinder is disposed on the top of the connecting plate and is drivenly connected to the pressure plate; a pair of sliding grooves are symmetrically formed on both sides of the connecting plate, and the pair of top plates respectively slide in cooperation with the pair of sliding grooves; a control device for controlling the sliding of the top plates is disposed inside the connecting plate; the bottom of the top plates is connected to the clamping plates through a connecting rod, and a support block is disposed on the top of the support plate corresponding to the position of the clamping plates.

[0010] The invention is further configured such that the bottom of the shock-absorbing device is provided with an annular mounting groove, and a plurality of rolling shafts are arranged at an annular interval in the mounting groove, and a transmission belt is sleeved on the rolling shafts.

[0011] The invention is further configured such that the control board is used to realize the coordinated motion control of the two spindles.

[0012] In summary, the present invention has the following main beneficial effects: This invention achieves efficient and uniform cooling and chip removal for different workpieces through the synergistic effect of a flexibly adjustable liquid storage tank and a liquid spraying assembly, significantly improving the surface quality and tool life. A clamping assembly driven by a telescopic cylinder, linking a pressure plate with a sliding top plate and a clamping plate, enables rapid and stable clamping of workpieces of different sizes, enhancing the equipment's adaptability and operational efficiency. A built-in rolling mechanism and a vibration damping device with a transmission belt effectively limit and buffer the dual spindles, significantly suppressing the complex vibrations generated by high-speed operation and ensuring the long-term accuracy and stability of the dual spindle's coordinated motion. These improvements work together to comprehensively enhance the device's high-speed, high-precision machining capabilities, process adaptability, and reliability. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Another perspective illustration; Figure 3 This is a partial bottom view of the structure of the present invention; Figure 4 This is a partial structural schematic diagram of the present invention; Figure 5 This is a schematic diagram of the shock absorption device of the present invention; Figure 6 This is a schematic diagram of the liquid storage tank structure of the present invention.

[0014] In the diagram: 1. Support plate; 2. Control plate; 3. Drill rod body; 4. Liquid storage tank; 5. Mounting plate; 6. Connector; 7. Spray pipe; 8. Telescopic cylinder; 9. Top plate; 10. Clamping plate; 11. Mounting block; 12. Guide groove; 13. Pressure plate; 14. Slide groove; 15. Connecting rod; 16. Shock absorber; 17. Connecting plate; 18. Rolling shaft; 19. Transmission belt; 20. Mounting groove; 21. Flushing tank; 22. Spray nozzle; 23. Connection port; 24. Drain port. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0016] The embodiments of the present invention will now be described.

[0017] High-speed, high-precision vertical drilling and tapping device based on dual-spindle collaborative control, such as Figure 1-6As shown, the entire device uses a support plate 1 as its base mounting platform. A pair of control plates 2 are symmetrically fixedly mounted on the upper surface of the support plate 1. Each control plate 2 integrates a motor drive unit, a position feedback unit, and a coordination control unit, used to drive and precisely coordinate the rotational speed, feed position, and synchronous movement of the two spindles. A drill rod body 3 is rigidly connected to the inner side of each control plate 2 near the other. The front end of the drill rod body 3 is used to mount machining tools such as drill bits or taps, forming the device's dual-spindle machining unit.

[0018] A mounting plate 5 is fixedly installed on top of the support plate 1, between a pair of drill rod bodies 3. A guide groove 12 is machined along the length of the mounting plate 5 (typically parallel to the line connecting the two spindles). A reservoir 4 for storing and supplying coolant slides into the guide groove 12 via a slider or guide rail structure at its bottom, allowing the reservoir 4 to reciprocate along the guide groove 12. An adjustment mechanism is provided to drive the reservoir 4 to move and adjust its position. Specifically, a threaded rod (not labeled in the figure) is installed parallel to the guide groove 12, with both ends supported on the mounting plate 5 by bearing seats. A threaded block or nut block that meshes with the threaded rod is provided at the bottom of the reservoir 4. A mounting block 11 is fixedly installed at the center of the top of the mounting plate 5. The mounting block 11 encapsulates a drive motor (such as a servo motor or stepper motor) and a reduction mechanism. The output shaft of the drive motor is connected to one end of the threaded rod via a coupling. When the drive motor starts, it drives the threaded rod to rotate, which in turn drives the liquid storage tank 4, which is threaded with it, to move precisely along the guide groove 12. This allows the position of the coolant supply source to be flexibly adjusted according to the size of the workpiece or the requirements of the processing position.

[0019] A connector 6 is also fixedly installed on the top of the support plate 1. A pair of spray pipes 7 are arranged side-by-side and independently on the top of the connector 6. The ends of these spray pipes 7 extend to the area above the reservoir 4 and point towards the intended processing point. The spray pipes 7 are connected to a coolant supply pump via external piping, enabling pressurized spraying of coolant to assist in rinsing, cooling, and chip removal of the processing area.

[0020] The reservoir 4 itself is designed with an internal circulation structure. Specifically, a flushing tank 21 is provided inside the reservoir 4. A connection port 23 is provided on one side wall of the flushing tank 21 for connecting to an external coolant supply line. Inside the flushing tank 21, one or more spray nozzles 22 are arranged opposite or around the connection port 23. Coolant enters from the connection port 23 and is sprayed at high speed into the flushing tank 21 through the spray nozzles 22. A drain port 24 is provided on the other side wall of the flushing tank 21 away from the connection port 23. This design allows the coolant to form a directional circulation or turbulence within the flushing tank 21, which on the one hand can better cool the flowing tool or workpiece, and on the other hand can forcefully carry away the chips generated during machining from the drain port 24, achieving active chip removal.

[0021] The clamping assembly of the device is used to fix the workpiece to be processed. This assembly includes a connecting plate 17, a pressure plate 13, a telescopic cylinder 8, a pair of top plates 9, and a pair of clamping plates 10. The connecting plate 17 is mounted on top of the support plate 1 via a support column or directly fixed. The pressure plate 13 is positioned directly below the connecting plate 17. The telescopic cylinder 8 (preferably a hydraulic cylinder or an electric push rod) is fixedly mounted on top of the connecting plate 17, with its piston rod or push rod passing downwards through the connecting plate 17 and fixedly connected to the top center of the pressure plate 13. By controlling the extension and retraction of the telescopic cylinder 8, the pressure plate 13 can be driven to move up and down, thereby pressing or releasing the workpiece from above. A pair of vertical or guide-angled grooves 14 are symmetrically provided on both sides of the connecting plate 17. The inner sides of the pair of top plates 9 are respectively provided with sliders that match the shape of the grooves 14, allowing them to slide up and down along the grooves 14. A control device is installed inside (or on the side) of the connecting plate 17. This control device may include another set of motor-screw mechanism, linear motor, or cylinder, etc., for independently or synchronously driving the two top plates 9 to slide along the slide groove 14. The bottom of each top plate 9 is fixedly connected to the top of a clamping plate 10 via one or more connecting rods 15. Support blocks (not labeled in the figure) are fixedly installed on the top of the support plate 1, corresponding to the position below each clamping plate 10. During operation, the workpiece is placed on a pair of support blocks. By controlling the top plate 9 to descend, the clamping plate 10 is driven to clamp or position the workpiece from the side. Working in conjunction with the pressure plate 13 above, it achieves fast and stable multi-point clamping of the workpiece, which is especially suitable for long strip-shaped workpieces or workpieces that require side positioning.

[0022] To suppress vibrations generated during the high-speed rotation of the dual spindles and ensure machining accuracy, a vibration damping device 16 is installed on the top of the support plate 1, adjacent to the drill rod body 3. The main structure of this vibration damping device 16 can flexibly limit the radial or axial movement of the pair of drill rod bodies 3. Specifically, an annular mounting groove 20 is machined at the bottom of the vibration damping device 16. Several rolling shafts 18 are evenly spaced along the circumference of this annular mounting groove 20. The two ends of each rolling shaft 18 are mounted on the side wall of the mounting groove 20 via bearings, allowing it to rotate freely. An annular transmission belt 19 is fitted around all the rolling shafts 18. The outer surface of the transmission belt 19 can maintain slight contact or a small gap with the outer shell of the drill rod body 3 or a specially designed contact block. When the drill rod body 3 vibrates, its energy is transferred to the transmission belt 19 through contact, driving the rolling shafts 18 to rotate, thereby partially converting the vibration energy into rolling friction energy and kinetic energy, achieving buffering and absorption of vibration.

[0023] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A high-speed high-precision vertical drilling and tapping device based on dual-spindle cooperative control, characterized in that, The utility model provides a kind of drilling machine, including: Supporting plate (1); A pair of control plates (2) are symmetrically arranged on the supporting plate (1); A pair of drill rod bodies (3) are respectively arranged on the inner side of a pair of the control plates (2) opposite to each other; Mounting plate (5) is arranged on the top of the supporting plate (1) and between a pair of the drill rod bodies (3), and a guide groove (12) is formed in the mounting plate (5); Liquid storage tank (4) is movably arranged on the mounting plate (5) and cooperates with the guide groove (12); Adjusting mechanism is used to drive the liquid storage tank (4) to move along the guide groove (12) to adjust its position; Liquid injection assembly is arranged on the top of the supporting plate (1) to spray liquid to the machining area; Clamping assembly is arranged on the top of the supporting plate (1) to clamp the workpiece; And Cushioning device (16) is arranged on the top of the supporting plate (1) to limit and buffer the rotation vibration of a pair of the drill rod bodies (3).

2. The high-speed high-precision vertical tapping device based on dual-spindle cooperative control according to claim 1, characterized in that: The adjusting mechanism includes a threaded rod formed in the guide groove (12) and a mounting block (11) arranged at the center of the top of the mounting plate (5), the mounting block (11) is in transmission connection with the threaded rod and drives its rotation, and the liquid storage tank (4) is in threaded cooperation with the threaded rod.

3. The high-speed high-precision vertical tapping device based on dual-spindle cooperative control according to claim 1, characterized in that: The liquid injection assembly includes a connecting piece (6) arranged on the top of the supporting plate (1) and a pair of liquid injection pipes (7) arranged side by side on the top of the connecting piece (6) and extending above the liquid storage tank (4).

4. The high-speed and high-precision vertical tapping device based on dual-spindle cooperative control according to claim 1, characterized in that: A flushing groove (21) is formed in the liquid storage tank (4), one side of the flushing groove (21) is provided with a connecting port (23), a liquid injection port (22) in communication with the connecting port (23) is arranged in the flushing groove (21), and a liquid discharge port (24) is formed in the side of the liquid storage tank (4) away from the connecting port (23).

5. The high-speed and high-precision vertical tapping device based on dual-spindle cooperative control according to claim 1, characterized in that: The clamping assembly includes a connecting plate (17), a pressing plate (13), a telescopic cylinder (8), a pair of top plates (9) and a pair of clamping plates (10); The connecting plate (17) is arranged on the top of the supporting plate (1), the pressing plate (13) is arranged below the connecting plate (17), and the telescopic cylinder (8) is arranged on the top of the connecting plate (17) and in driving connection with the pressing plate (13); A pair of sliding grooves (14) are symmetrically formed in the two sides of the connecting plate (17), a pair of the top plates (9) are respectively in sliding cooperation with a pair of the sliding grooves (14), and a control device for controlling the sliding of the top plates (9) is arranged in the connecting plate (17); The bottom of the top plate (9) is connected with the clamping plate (10) through a connecting rod (15), and a supporting block is arranged on the top of the supporting plate (1) corresponding to the position of the clamping plate (10).

6. The high-speed and high-precision vertical tapping device based on dual-spindle cooperative control according to claim 1, characterized in that: The bottom of the cushioning device (16) is provided with an annular mounting groove (20), a plurality of rolling shafts (18) are arranged in the mounting groove (20) in an annular interval, and a transmission belt (19) is arranged outside the rolling shaft (18).

7. The high-speed high-precision vertical tapping device based on dual-spindle cooperative control according to any one of claims 1 to 6, characterized in that: The control plate (2) is used to realize the cooperative motion control of double main shafts.

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