Quick positioning servo turret telescopic mechanism

Abstract

The utility model discloses a quick positioning's servo cutter tower telescopic mechanism relates to cutter tower technical field, the utility model discloses a cutter head is provided with a plurality of tool holders, the inside of tool holder is provided with locking mechanism, the locking mechanism includes piston cylinder, piston and cover, the one side of piston cylinder and the one side of cover are connected through bolt fixing, is established with a plurality of guide slot on the inner wall of piston cylinder, the utility model discloses a tool holder, cutter head, guide slot, guide pin and pressure balance hole are set up, when piston moves, guide pin is along guide slot linear sliding, eliminates lateral deflection force, avoids piston and cylinder body inner wall friction jam, in the process of piston movement, the residual oil in guide slot is through pressure balance hole and flows into piston cavity quickly, balances both sides pressure, eliminates the movement lag of oil compressibility, has solved the movement unbalance problem when cutter tower indexing, has guaranteed the quick, stable and high accuracy of tool changing process.

Description

Technical Field

[0001] This utility model relates to the field of turret technology, specifically a servo turret telescopic mechanism that can be quickly positioned. Background Technology

[0002] The turret, also known as a rotating tool post, is a core functional component of CNC lathes. It is mainly used for rapid switching between multiple tools to achieve one-time machining of complex parts. Multiple tools (such as turning tools, drills, and milling cutters) can be mounted on the turret. Different processes (such as turning, drilling, and tapping) are completed by automatically switching tools, eliminating the need for manual tool changing and greatly improving machining efficiency.

[0003] When the existing piston moves axially under the drive of hydraulic oil, the lateral force causes increased friction with the inner wall of the piston cylinder, increasing the resistance to movement and even causing a "creeping" phenomenon. As a result, the efficiency is low and the positioning accuracy is poor when connected to the tool body. Utility Model Content

[0004] Based on this, the purpose of this utility model is to provide a servo turret telescopic mechanism that can be quickly positioned, so as to solve the technical problem of increased friction on the inner wall of the piston cylinder and increased motion resistance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a servo turret telescopic mechanism capable of rapid positioning, comprising a cutter disc, wherein a plurality of cutter holders are provided on the cutter disc, and a locking mechanism is provided inside the cutter holders. The locking mechanism includes a piston cylinder, a piston, and a protective cover. One side of the piston cylinder and one side of the protective cover are fixedly connected by bolts. A plurality of guide grooves are provided on the inner wall of the piston cylinder. One end of each guide groove is provided with a pressure balance hole, and the other end of the pressure balance hole is connected to the cavity between the piston cylinder and the piston. Guide pins are slidably connected inside each of the plurality of guide grooves. One end of each guide pin is fixedly connected to one side of the piston. A first mounting groove is provided between adjacent guide grooves. A first proximity switch is fixedly connected inside the first mounting groove. A second mounting groove is provided on the protective cover, and a second proximity switch is fixedly connected inside the second mounting groove.

[0006] By adopting the above technical solution, the cooperation between the guide pin and the guide groove forces the piston to move only along the axial direction, avoiding fluctuations in frictional resistance caused by lateral sway.

[0007] Furthermore, a turret body is provided on one side of the cutter head, a cutter head rotation drive motor is provided on one side of the turret body, and a milling shaft drive motor is provided above the turret body.

[0008] By adopting the above technical solution, the drive motor and the turret body are integrated to reduce external transmission components, reduce space occupation, and are suitable for high-density CNC machine tool layouts.

[0009] Furthermore, the locking mechanism also includes oil port one, oil port two, clutch, sleeve gear, cover plate and pad block, and the piston cylinder and piston are slidably connected.

[0010] By adopting the above technical solution, the dual oil ports enable precise bidirectional piston drive, and combined with dynamic hydraulic oil balance, improve tool change time.

[0011] Furthermore, oil port one and oil port two are opened on one side of the piston cylinder and located on both sides of the piston.

[0012] By adopting the above technical solution, the symmetrical layout of the oil ports can provide the pressure difference required for the piston to move, and can avoid local wear caused by uneven load on the hydraulic cylinder through precise control.

[0013] Furthermore, one side of the cover plate is fixedly connected to one end of the piston, and a pad is provided inside the piston.

[0014] By adopting the above technical solution, the cover plate is fixed by bolts and piston to achieve internal sealing, while the gasket can provide installation adjustment and wear resistance, improving the stability of installation.

[0015] Furthermore, a bolt is provided on one side of the pad, the bolt passes through the pad and one end is threaded to the clutch, and the clutch and the sleeve gear are slidably connected.

[0016] By adopting the above technical solution, the threaded fixing of the bolt eliminates the gap between the clutch and the sleeve gear, ensuring that the meshing position maintains sufficient accuracy.

[0017] Furthermore, multiple second mounting slots are provided, corresponding to the first mounting slot, and the first proximity switch and the second proximity switch are connected to an external controller via signal control cables.

[0018] By adopting the above technical solution, multiple sets of proximity switches form a redundant detection network, which can still complete the positioning even if a single sensor fails.

[0019] In summary, the present invention has the following main advantages:

[0020] This invention, by setting up a tool holder, tool disc, guide groove, guide pin, and pressure balance hole, allows the guide pin to slide linearly along the guide groove when the piston moves, eliminating lateral swaying force and preventing friction and jamming between the piston and the inner wall of the cylinder. During the piston movement, the residual oil in the guide groove flows quickly into the piston chamber through the pressure balance hole, balancing the pressure on both sides and eliminating the motion lag caused by the compressibility of the oil. This solves the problem of motion imbalance during tool turret indexing, ensuring that the tool changing process is fast, stable, and highly accurate.

[0021] This invention, by setting a first mounting slot, a first proximity switch, a second mounting slot, and a second proximity switch, allows the first proximity switch to trigger a signal when the piston enters its final stroke. The PLC then dynamically reduces the oil pressure to eliminate inertial overshoot. When the piston reaches the target position, the second proximity switch triggers a final signal, and the PLC cuts off the oil circuit, causing the piston to stop at zero speed. The hierarchical feedback from the dual proximity switches reduces the response delay of the hydraulic system and improves the synchronization of the tool changing action. Through the hierarchical triggering of the dual proximity switches and the coordinated pressure regulation of the PLC, a precise control logic of "high-speed approach - low-speed approximation - zero-speed locking" is achieved, completely solving the problem of insufficient positioning accuracy of traditional single sensors. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a three-dimensional structural diagram of the sleeve gear of this utility model;

[0024] Figure 3 This is a three-dimensional structural diagram of the locking mechanism of this utility model;

[0025] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A;

[0026] Figure 5 This is a schematic diagram of the exploded structure of this utility model.

[0027] Figure 6 This is a schematic diagram of the piston cylinder of this utility model.

[0028] In the diagram: 1. Tool holder; 2. Tool head; 3. Milling axis drive motor; 4. Turret body; 5. Tool head rotation drive motor; 6. Clutch; 7. Gear sleeve; 8. Piston cylinder; 9. Protective cover one; 10. Cover plate; 11. Pad block; 12. Piston; 13. Locking mechanism; 14. Bolt; 131. Guide groove; 132. Guide pin; 133. Pressure balance hole; 134. First mounting groove; 135. First proximity switch; 136. Second mounting groove; 137. Second proximity switch; 138. Oil port one; 139. Oil port two. Detailed Implementation

[0029] The technical solutions 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.

[0030] A servo turret telescopic mechanism that can be quickly positioned, such as Figures 1-6As shown, the device includes a cutter head 2, on which several cutter holders 1 are mounted. A locking mechanism 13 is installed inside each cutter holder 1. The locking mechanism 13 includes a piston cylinder 8, a piston 12, and a cover 9. One side of the piston cylinder 8 and one side of the cover 9 are fixedly connected by bolts. Several guide grooves 131 are formed on the inner wall of the piston cylinder 8. One end of each guide groove 131 has a pressure balance hole 133, and the other end of the pressure balance hole 133 communicates with the cavity between the piston cylinder 8 and the piston 12. Guide pins 132 are slidably connected inside each guide groove 131. One end of each guide pin 132 is fixedly connected to one side of the piston 12. Adjacent guide grooves 13... A first mounting slot 134 is provided between the two parts, and a first proximity switch 135 is fixedly connected inside the first mounting slot 134. A second mounting slot 136 is provided on the cover 9, and a second proximity switch 137 is fixedly connected inside the second mounting slot 136. The pressure balance hole 133 balances the oil pressure between the piston chamber and the guide slot in real time, reducing the motion delay caused by the compressibility of hydraulic oil. The dual proximity switches perform graded detection and are combined with PLC dynamic pressure adjustment to realize the three-stage control of "high-speed movement - low-speed approach - zero-speed locking", which improves the repeatability accuracy. If the proximity switch does not trigger the signal within the set time, the PLC will automatically alarm and release pressure to prevent the jamming from worsening.

[0031] See Figure 1 A turret body 4 is provided on one side of the cutter head 2, a cutter head rotation drive motor 5 is provided on one side of the turret body 4, and a milling axis drive motor 3 is provided above the turret body 4. The milling axis drive motor 3 independently controls the rotation of the tool, avoiding interference with the indexing action of the cutter head and improving machining stability.

[0032] See Figure 3 , Figure 4 , Figure 5 and Figure 6 The locking mechanism 13 also includes oil port 138, oil port 2 139, clutch 6, sleeve gear 7, cover plate 10 and pad block 11. Piston cylinder 8 and piston 12 are slidably connected. The slidable connection between clutch 6 and sleeve gear 7 ensures seamless switching of power transmission, reduces gear meshing impact, and extends the service life of transmission components.

[0033] See Figure 3 , Figure 4 , Figure 5 and Figure 6 Oil port 138 and oil port 2 139 are opened on one side of piston cylinder 8 and located on both sides of piston 12. Through oil port 138 and oil port 2 139 on both sides, the oil circuit switching efficiency is improved and the response delay of hydraulic system is reduced.

[0034] See Figure 3 , Figure 4 , Figure 5 and Figure 6One side of the cover plate 10 is fixedly connected to one end of the piston 12. The piston 12 has a pad 11 inside. The modular design allows for quick disassembly of the cover plate 10 and the pad 11, reducing maintenance costs.

[0035] See Figure 3 , Figure 4 , Figure 5 and Figure 6 A bolt 14 is provided on one side of the pad 11. The bolt 14 passes through the pad 11 and is threaded to the clutch 6 at one end. The clutch 6 and the sleeve gear 7 are slidably connected. The bolt preload counteracts the inertial vibration during high-speed tool changing and avoids the risk of loosening.

[0036] See Figure 3 , Figure 4 , Figure 5 and Figure 6 Multiple second mounting slots 136 are provided and correspond to the first mounting slot 134. The first proximity switch 135 and the second proximity switch 137 are connected to the external controller through signal control cables. The signal control cables adopt a shielded design to reduce the impact of electromagnetic interference on PLC signals and improve system stability.

[0037] The implementation principle of this utility model is as follows: First, the cutter head 2 is in the locked position, the clutch 6 is engaged with the tool holder 1, and the milling shaft drive motor 3 drives the sleeve gear 9 to rotate through the gear, thereby driving the tool to rotate.

[0038] When a tool needs to be changed, the CNC system sends a tool change command. High-pressure oil is injected into oil port 138, and high-pressure oil flows out from oil port 139 on the other side, pushing piston 12 to the right. Guide pin 132 slides in guide groove 131. When the second proximity switch 137 detects that the piston has entered the end sensing range, the PLC controls the solenoid valve to reduce the oil pressure. Piston 12 decelerates. When piston 12 reaches the detection position of the second proximity switch 137, the oil pressure returns to zero. Clutch 6 is completely disengaged from tool holder 1 and tool. The signal control cable feeds back "disengagement complete" to the CNC system. Tool head rotation drive motor 5 starts and drives tool head 2 to rotate to the target position through the transmission shaft.

[0039] When locking is required, high-pressure oil is injected into port 2 139, and high-pressure oil on the other side flows out from port 1 138. The oil injection pushes the piston to the left. At this time, the guide pin 132 is inserted into the guide groove 131. At the same time, the hydraulic oil inside the guide groove 131 flows out from the pressure balance hole 133 and flows out from port 1 138. The pawl at one end of the clutch 6 precisely meshes with the pawl at one end of the tool holder 1, completing the tool change.

[0040] Subsequently, the milling axis drive motor 3 drives the sleeve gear 9 to rotate via the gear, thereby driving the tool to rotate.

[0041] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. 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 present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A servo turret telescopic mechanism capable of rapid positioning, characterized in that: The device includes a cutter head (2), on which several cutter holders (1) are provided. A locking mechanism (13) is provided inside each cutter holder (1). The locking mechanism (13) includes a piston cylinder (8), a piston (12), and a cover (9). One side of the piston cylinder (8) and one side of the cover (9) are fixedly connected by bolts. Several guide grooves (131) are provided on the inner wall of the piston cylinder (8). One end of each guide groove (131) has a pressure balance hole (133), and the other end of the pressure balance hole (133) is connected to the piston cylinder (8). The cavities between the pistons (12) are connected. A guide pin (132) is slidably connected inside each of the guide grooves (131). One end of the guide pin (132) is fixedly connected to one side of the piston (12). A first mounting groove (134) is provided between adjacent guide grooves (131). A first proximity switch (135) is fixedly connected inside the first mounting groove (134). A second mounting groove (136) is provided on the cover (9). A second proximity switch (137) is fixedly connected inside the second mounting groove (136).

2. The servo turret telescopic mechanism with rapid positioning according to claim 1, characterized in that: A turret body (4) is provided on one side of the cutter head (2), a cutter head rotation drive motor (5) is provided on one side of the turret body (4), and a milling shaft drive motor (3) is provided above the turret body (4).

3. The servo turret telescopic mechanism with rapid positioning according to claim 1, characterized in that: The locking mechanism (13) also includes an oil port one (138), an oil port two (139), a clutch (6), a sleeve gear (7), a cover plate (10) and a pad (11), and the piston cylinder (8) and the piston (12) are slidably connected.

4. The servo turret telescopic mechanism with rapid positioning according to claim 3, characterized in that: The first oil port (138) and the second oil port (139) are opened on one side of the piston cylinder (8) and located on both sides of the piston (12).

5. The servo turret telescopic mechanism with rapid positioning according to claim 3, characterized in that: One side of the cover plate (10) is fixedly connected to one end of the piston (12), and a pad (11) is provided inside the piston (12).

6. The servo turret telescopic mechanism with rapid positioning according to claim 3, characterized in that: A bolt (14) is provided on one side of the pad (11). The bolt (14) passes through the pad (11) and one end is threaded to the clutch (6). The clutch (6) and the sleeve gear (7) are slidably connected.

7. The servo turret telescopic mechanism with rapid positioning according to claim 1, characterized in that: The second mounting slot (136) is provided in multiple ways and corresponds to the first mounting slot (134). The first proximity switch (135) and the second proximity switch (137) are connected to an external controller via a signal control cable.

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