Deep hole drilling tool with anti-vibration structure

Abstract

The utility model relates to deep hole drilling tool technical field especially, it relates to a deep hole drilling tool with anti vibration structure. Including fixed handle, end, sealing washer and drill bit etc. parts, the lower part sliding sleeve of fixed handle is equipped with end, the inside one side of fixed handle is fixedly connected with sealing washer, sealing washer, fixed handle and end form sealed cavity, the inside filling of sealed cavity is high viscosity buffer oil, sealing washer is on the upper side wall of end and slides and tightly sticks, the lower part fixed connection of end has drill bit, and the outside annular array of drill bit is provided with chip groove. The utility model discloses through the sliding sleeve structure between fixed handle and end, cooperate the sealed cavity of inside filling high viscosity buffer oil and the hydraulic buffer of annular array, utilize the microshift of end in the drilling process and force buffer oil to produce high -speed shearing flow and drive hydraulic buffer to act, convert vibration kinetic energy into heat energy dissipation, form the composite damping mechanism of active and passive combination.

Description

Technical Field

[0001] This utility model relates to the field of deep hole drilling tool technology, and in particular to a deep hole drilling tool with a vibration-damping structure. Background Technology

[0002] Deep hole drilling is an important machining process, specifically referring to the drilling of deep holes with a depth-to-diameter ratio greater than 10. This process is widely used in the manufacturing of key components in energy equipment, aerospace, precision instruments, and the automotive industry, such as oil holes in engine connecting rods, flow channels in hydraulic valve bodies, gun drills, and cooling water holes in molds. Due to the slender and rigid drill rod, chatter is easily generated during machining due to fluctuations in cutting force, poor chip removal, or the release of internal residual stress. This leads to problems such as decreased machining accuracy, deterioration of hole wall surface quality, accelerated tool wear, and even tool breakage, severely restricting machining efficiency and product yield.

[0003] In deep hole drilling, the large overhang and weak rigidity of the cutting tool make it highly susceptible to severe vibrations during the cutting process. However, existing deep hole drilling systems generally lack effective built-in vibration damping structures, failing to effectively suppress self-excited and forced vibrations caused by cutting force fluctuations. This vibration not only leads to geometric errors such as borehole skewing, diameter enlargement, and internal wall chatter marks, severely affecting machining accuracy and hole surface quality, but also accelerates tool wear and can even cause chipping or breakage. Simultaneously, the noise and impact generated by vibration also affect equipment stability and operational safety. The vibration problem is particularly pronounced when machining high-strength materials or performing high-efficiency cutting.

[0004] Therefore, it is necessary to design a deep hole drilling tool with a vibration-damping structure to solve the above-mentioned technical problems. Utility Model Content

[0005] To overcome the problem that deep hole drilling is prone to vibration due to the long overhang and poor rigidity of the tool, existing systems lack effective anti-vibration structures, making it difficult to suppress self-excited and forced vibrations, which leads to hole diameter deviation, surface rippling, decreased accuracy, accelerated tool wear, and even tool breakage, and affects equipment stability and operational safety, especially when machining high-strength materials or performing high-efficiency cutting. This utility model provides a deep hole drilling tool with an anti-vibration structure.

[0006] The technical solution of this utility model is: a deep hole drilling tool with a vibration-damping structure, including a fixed shank, an end head, a sealing ring, a drill bit, and a hydraulic damper. The end head is slidably sleeved on the lower part of the fixed shank. A sealing ring is fixedly connected to one side of the inside of the fixed shank. The sealing ring, the fixed shank, and the end head form a sealed cavity. The sealed cavity is filled with high-viscosity buffer oil. The sealing ring slides on one side of the upper part of the end head and fits tightly. A drill bit is fixedly connected to the lower part of the end head. Chip removal grooves are formed in a ring array on the outside of the drill bit. Multiple hydraulic dampers are connected in a ring array between the bottom of the fixed shank and the top of the end head. Abutment grooves are formed on both sides of the upper part of the fixed shank.

[0007] Furthermore, it also includes a liquid guide cover and a connector. A liquid guide channel one is opened inside the fixed handle. A liquid guide cover is rotatably sleeved on the upper part of the fixed handle. The internal cavity of the liquid guide cover is connected to the liquid guide channel one. A liquid guide channel two is opened inside the end. A liquid guide channel three is opened inside the drill bit. Liquid guide channels one, two, and three are interconnected. A connector is connected to the right side of the liquid guide cover.

[0008] Furthermore, a threaded groove is provided on the outer wall of the right side of the connector.

[0009] Furthermore, it also includes a splash guard, wedge-shaped locking blocks, compression springs, and pressing heads. The splash guard is slidably placed on the outside of the drill bit. Wedge-shaped locking blocks are slidably connected to both sides inside the end head. The splash guard has locking grooves on both sides inside the end head. The two wedge-shaped locking blocks are locked into the corresponding locking grooves. Compression springs are connected between the two wedge-shaped locking blocks and the end head. Pressing heads are slidably connected to both sides inside the end head. The two pressing heads are inserted into the corresponding end head and fixedly connected to the corresponding wedge-shaped locking blocks.

[0010] Furthermore, the splash guard has a conical structure, and multiple guide grooves are formed in a ring array inside the splash guard.

[0011] Furthermore, it also includes a connecting rod, a push block, a top plate, and a tension spring. The connecting rod is fixedly connected to the top of the end, and the push block is fixedly connected inside the fixed handle. The top plate is slidably connected inside the two abutting grooves, and a tension spring is connected between the two top plates. The tension spring is located inside the fixed handle, and an inclined block is fixedly provided on one side of each of the two top plates. Both inclined blocks abut against the push block.

[0012] The beneficial effects of this utility model are as follows: 1. This utility model uses a sliding sleeve structure between the fixed handle and the end head, combined with a sealed cavity filled with high-viscosity buffer oil and a ring array of hydraulic buffers. During the drilling process, the micro-displacement of the end head forces the buffer oil to generate high-speed shear flow and drives the hydraulic buffer to operate, converting the vibration kinetic energy into heat energy dissipation, forming a composite vibration reduction mechanism that combines active and passive methods. This effectively solves the technical pain points of hole wall quality deterioration and tool wear caused by vibration in deep hole machining, and achieves the effect of significantly suppressing vibration transmission, improving machining accuracy and tool life.

[0013] 2. This utility model forms a continuous coolant passage through three channels: a first channel, a second channel, and a third channel, which run through the fixed shank, the end, and the drill bit. This allows high-pressure coolant to reach the cutting edge of the drill bit directly for efficient cooling and lubrication. Combined with the spiral chip removal groove on the outside of the drill bit, cutting chips are forcibly discharged. At the same time, the conical splash guard and its inner wall guide groove effectively collect splashed coolant and chips and guide them back to the chip removal groove. This achieves multiple effects, including ensuring continuous and stable machining and improving the working environment.

[0014] 3. This utility model achieves quick installation and removal of the splash guard through the mechanical interlocking structure of the wedge-shaped locking block and the locking groove. It uses a compression spring to achieve automatic locking and a linkage mechanism that drives the inclined block top plate through the connecting rod and the push block to provide compensation space for end displacement. With the help of the tension spring, it achieves automatic reset, so that the tool can quickly return to the initial state after vibration ends. This achieves the practical effect of improving the convenience of operation and preparation efficiency. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a three-dimensional structural diagram of the components of this utility model, including the fixing handle, end, and sealing ring.

[0017] Figure 3 This is a three-dimensional structural diagram of the components of this utility model, including the fixed handle, end, and hydraulic buffer.

[0018] Figure 4 This is a three-dimensional structural diagram of the drill bit, fluid guide cover, and connector components of this utility model.

[0019] Figure 5 This is a three-dimensional structural diagram of the liquid guide cover, fixing handle, and connector of this utility model.

[0020] Figure 6 This is a three-dimensional structural diagram of the end cap and drill bit of this utility model.

[0021] Figure 7 This is a three-dimensional structural diagram of the end cap, drill bit, and splash guard of this utility model.

[0022] Figure 8 for Figure 7 A magnified structural diagram of point A in the middle.

[0023] Figure 9 This is a three-dimensional structural diagram of the end cap, drill bit, and splash guard of this utility model.

[0024] Figure 10This is a three-dimensional structural diagram of the connecting rod, push block, and top plate of this utility model.

[0025] Figure 11 This is a three-dimensional structural diagram of the tension spring, push block, and fixing handle of this utility model.

[0026] Figure 12 This is a three-dimensional structural diagram of the fixed handle, top plate, and tension spring of this utility model.

[0027] The parts and their numbers in the diagram are as follows: 1. Fixing handle, 2. End, 3. Sealing ring, 4. Drill bit, 5. Chip removal groove, 6. Hydraulic buffer, 7. Abutment groove, 8. Fluid guide cover, 9. Connector, 10. Splash shield, 11. Wedge block, 12. Compression spring, 13. Pressing head, 14. Connecting rod, 15. Push block, 16. Top plate, 17. Tension spring. Detailed Implementation

[0028] Example: A deep hole drilling tool with a vibration damping structure, such as Figures 1-11 As shown, the device includes a fixed handle 1, an end head 2, a sealing ring 3, a drill bit 4, and a hydraulic buffer 6. The end head 2 is slidably fitted onto the lower end of the fixed handle 1. The sealing ring 3 is glued to the lower side of the inside of the fixed handle 1. The sealing ring 3, the fixed handle 1, and the end head 2 form a sealed cavity, which is filled with high-viscosity buffer oil. The sealing ring 3 slides on the upper outer wall of the end head 2 and fits tightly. The drill bit 4 is fixedly connected to the lower end of the end head 2. The outer side of the drill bit 4 has a spiral chip removal groove 5 arranged in an annular array. Six hydraulic buffers 6 are installed in an annular array between the bottom side of the fixed handle 1 and the top side of the end head 2 by screws. The two ends of each hydraulic buffer 6 are connected to the fixed handle 1 and the end head 2 by ball joints or universal joints. The upper left and right sides of the fixed handle 1 have abutment grooves 7.

[0029] like Figures 1-12 As shown, it also includes a liquid guide cover 8 and a connector 9. A liquid guide channel 1 is opened inside the fixed handle 1. The liquid guide cover 8 is rotatably sleeved on the upper part of the fixed handle 1. The internal cavity of the liquid guide cover 8 is connected to the liquid guide channel 1. A liquid guide channel 2 is opened inside the end head 2. A liquid guide channel 3 is opened inside the drill bit 4. The liquid guide channel 1, liquid guide channel 2 and liquid guide channel 3 are interconnected. The right side of the liquid guide cover 8 is connected to and connected to the connector 9. A threaded groove is opened on the outer wall of the right side of the connector 9.

[0030] like Figure 1 , Figure 4 and Figure 5As shown, it also includes a splash guard 10, wedge-shaped locking blocks 11, compression springs 12, and pressing heads 13. The splash guard 10 is slidably placed on the outside of the drill bit 4. The splash guard 10 has a conical structure. Multiple guide grooves are arranged in a ring array on the inner wall of the splash guard 10. The wedge-shaped locking blocks 11 are slidably connected to the front and rear sides of the end head 2. The front and rear sides of the inside of the splash guard 10 are provided with locking grooves. The two wedge-shaped locking blocks 11 are locked into the corresponding locking grooves. The two wedge-shaped locking blocks 11 are connected to the end head 2 with compression springs 12. The front and rear sides of the inside of the end head 2 are slidably connected with pressing heads 13. The two pressing heads 13 are inserted into the corresponding end head 2 and welded to the corresponding wedge-shaped locking blocks 11.

[0031] like Figure 1 , Figure 10 , Figure 11 and Figure 12 As shown, it also includes a connecting rod 14, a push block 15, a top plate 16, and a tension spring 17. The connecting rod 14 is welded to the top left of the end 2. The connecting rod 14 extends upward and passes through the fixed handle 1, where the push block 15 is welded. The top plate 16 is slidably connected inside the two abutting grooves 7. The tension spring 17 is connected between the two top plates 16 and is located inside the fixed handle 1. An inclined block is welded to the side of the two top plates 16 that is close to each other, and the two inclined blocks abut against the push block 15.

[0032] When this device is needed, first, firmly clamp the upper end of the tool's fixed shank 1 into the spindle chuck of the deep hole machining machine tool to ensure a stable connection. Then, tighten the external coolant delivery pipe to the connector 9 on the guide cover 8 through threaded connection to form a sealed coolant delivery path. After starting the machine tool, the spindle drives the entire tool (fixed shank 1, end 2, and drill bit 4) to rotate at high speed and feed forward. High-pressure coolant is injected from the connector 9, flows through the internal cavity of the guide cover 8, enters the guide channel one inside the fixed shank 1, then flows downward through the guide channel two, and finally reaches the guide channel three and sprays out. The high-pressure coolant fully cools and lubricates the cutting edge of the drill bit 4, while powerfully discharging the chips generated by cutting through the spiral chip removal groove 5 to ensure the continuity and stability of the machining process.

[0033] During the drilling process, the drill bit 4 will inevitably be impacted by uneven cutting forces from the workpiece, resulting in harmful vibrations. When the vibration occurs, the impact force is transmitted to the end 2 through the drill bit 4, forcing the end 2 to produce a slight axial displacement or radial wobble relative to the fixed shank 1. The movement of the end 2 compresses the sealed cavity formed by the sealing ring 3, the fixed shank 1, and the end 2, forcing the high-viscosity buffer oil in the cavity to generate high-speed shear flow, converting the vibration kinetic energy into heat energy dissipation. The hydraulic damper 6 is synchronously compressed or stretched, and its internal piston structure generates additional hydraulic damping, further absorbing and attenuating the vibration energy. Together, they constitute a composite vibration reduction mechanism combining active and passive forces, effectively suppressing the transmission of vibration to the fixed shank 1 and the machine tool spindle.

[0034] Before processing begins, the splash guard 10 can be installed. The conical splash guard 10 is placed over the outside of the drill bit 4 and pushed upwards. The inclined inner wall of the splash guard 10 presses the two pressing heads 13, causing them to slide inwards towards the end head 2. The pressing heads 13 push the wedge-shaped locking block 11 inwards against the force of the compression spring 12. When the splash guard 10 moves upwards to the position where the locking groove aligns with the wedge-shaped locking block 11, the restoring force of the compression spring 12 pushes the wedge-shaped locking block 11 outwards, locking it into the locking groove, thus completing the mechanical locking of the splash guard 10. The annular guide groove on the inner wall of the splash guard 10 can guide coolant and debris... To prevent splashing, the chip discharge groove 5 is used. When the end head 2 is axially displaced relative to the fixed handle 1, the connecting rod 14 drives the push block 15 to move synchronously. The inclined surface of the push block 15 slides with the inclined block, overcoming the tension of the tension spring 17 and pushing the two top plates 16 to the sides, providing compensation space for the displacement of the end head 2 and avoiding rigid interference. When the vibration weakens or disappears, the restoring force of the tension spring 17 pulls the two top plates 16 and the inclined blocks on them back to the center. The inclined surface of the inclined block interacts with the push block 15 to help push the entire end head 2 back to the initial equilibrium position.

[0035] After machining is completed, the spindle retracts. First, press the two pressing heads 13 inward simultaneously to disengage the wedge-shaped locking block 11 from the locking groove of the splash guard 10. Then, remove the splash guard 10 for cleaning. Next, turn off the coolant, disconnect the connector 9, and finally remove the tool from the spindle to complete all operations. At this time, under the combined action of the hydraulic buffer 6 and the tension spring 17, the end 2 and the fixed handle 1 have automatically returned to their initial relative positions and are in standby mode.

Claims

1. A deep hole drilling tool having a vibration-proof structure, characterized by comprising: It includes a fixed handle (1), an end (2), a sealing ring (3), a drill bit (4), and a hydraulic buffer (6). The end (2) is slidably fitted on the lower part of the fixed handle (1). The sealing ring (3) is fixedly connected to one side of the inside of the fixed handle (1). The sealing ring (3), the fixed handle (1), and the end (2) form a sealed cavity. The sealed cavity is filled with high-viscosity buffer oil. The sealing ring (3) slides on one side of the upper part of the end (2) and fits tightly. The drill bit (4) is fixedly connected to the lower part of the end (2). Chip removal grooves (5) are opened in an annular array on the outside of the drill bit (4). Multiple hydraulic buffers (6) are connected in an annular array between the bottom of the fixed handle (1) and the top of the end (2). Abutment grooves (7) are opened on both sides of the upper part of the fixed handle (1).

2. A deep hole drilling tool with a vibration-damping structure according to claim 1, characterized in that, It also includes a liquid guide cover (8) and a connector (9). The fixed handle (1) has a liquid guide channel one inside. The fixed handle (1) is rotatably fitted with a liquid guide cover (8). The internal cavity of the liquid guide cover (8) is connected to the liquid guide channel one. The end (2) has a liquid guide channel two inside. The drill bit (4) has a liquid guide channel three inside. The liquid guide channel one, liquid guide channel two and liquid guide channel three are interconnected. The right side of the liquid guide cover (8) is connected to and connected to the connector (9).

3. A deep hole drilling tool with a vibration-damping structure according to claim 2, characterized in that, The right outer wall of the connector (9) has a threaded groove.

4. A deep hole drilling tool with a vibration-damping structure according to claim 3, characterized in that, It also includes a splash guard (10), a wedge-shaped locking block (11), a compression spring (12), and a pressing head (13). The splash guard (10) is slidably placed on the outside of the drill bit (4). The wedge-shaped locking blocks (11) are slidably connected to both sides inside the end (2). The splash guard (10) has a locking groove on both sides inside. The two wedge-shaped locking blocks (11) are locked into the corresponding locking groove. The two wedge-shaped locking blocks (11) are connected to the end (2) by a compression spring (12). The pressing head (13) is slidably connected to both sides inside the end (2). The two pressing heads (13) are inserted into the corresponding end (2) and fixedly connected to the corresponding wedge-shaped locking block (11).

5. A deep hole drilling tool with a vibration-damping structure according to claim 4, characterized in that, The splash shield (10) has a conical structure, and multiple guide grooves are arranged in a ring array inside the splash shield (10).

6. A deep hole drilling tool with a vibration-damping structure according to claim 5, characterized in that, It also includes a connecting rod (14), a push block (15), a top plate (16) and a tension spring (17). The top of the end (2) is fixedly connected to the connecting rod (14). The connecting rod (14) passes through the inside of the fixed handle (1) and is fixedly connected to the push block (15). The top plate (16) is slidably connected inside the two abutting grooves (7). The tension spring (17) is connected between the two top plates (16). The tension spring (17) is located inside the fixed handle (1). An inclined block is fixed on one side of each of the two top plates (16). The two inclined blocks abut against the push block (15).

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