Ultrasonic-assisted deep hole drilling device

Abstract

The utility model provides an ultrasonic-assisted deep hole drilling device. The ultrasonic-assisted deep hole drilling device comprises a sliding table, a machine tool spindle, an ultrasonic deep hole drilling mechanism and a supporting and clamping mechanism. The machine tool spindle moves along the sliding table and is used for driving the ultrasonic deep hole drilling mechanism to conduct vibration intermittent drilling on the piston rod workpiece. The ultrasonic deep hole drilling mechanism is detachably connected to the machine tool spindle and comprises an ultrasonic amplitude-change pole and a gun drill tool bar, the ultrasonic deep hole drilling mechanism is used for converting electric energy into ultrasonic waves, the ultrasonic waves are transmitted to the gun drill tool bar through the ultrasonic amplitude-change pole, and a resonance point is formed in the tool nose position of the gun drill tool bar. After being combined with the movement of a machine tool spindle, high-frequency vibration is generated in the drilling direction, and a piston rod workpiece is vibrated and intermittently drilled; the supporting and clamping mechanism is arranged on the outer side of the gun drill cutter bar and the piston rod workpiece and used for supporting the gun drill cutter bar and the piston rod workpiece. According to the ultrasonic-assisted deep hole drilling device, the cutting resistance during deep hole drilling can be reduced, and the drilling precision is improved.

Description

Technical Field

[0001] The utility model relates to the field of drilling equipment, in particular to an ultrasonic assisted deep hole drilling device. Background Art

[0002] Intelligent coal mining often utilizes precise measurements from displacement sensors to ensure the straightness of hydraulic supports on the working face. During installation, the displacement sensor jack for the hydraulic support is mounted on a large-diameter deep-hole piston rod to accurately measure the jack's telescopic displacement in real time. Therefore, the measurement accuracy of the displacement sensor is affected by the accuracy of deep-hole machining. Furthermore, during hydraulic support movement, the piston rod is subjected to significant tension, and the hinged hole at the flat end of the piston rod is susceptible to fracture and failure. To ensure accurate measurement results and achieve intelligent mining on the fully mechanized working face, a high degree of coaxiality between the piston rod's deep hole and the outer circle is required.

[0003] To improve the accuracy of large-diameter deep holes, patent application CN118329505 A discloses an ultrasonic drilling-assisted sampling system for extraterrestrial bodies. The system comprises a sandwich piezoelectric ultrasonic transducer, a drill rig, a drill rig support, a drive shaft, and a motor. The drill rig includes a drill body, one end of which is bolted to one end of the sandwich piezoelectric ultrasonic transducer. The ultrasonic drilling-assisted sampling system uses the motor to drive the drive shaft and the drill rig below to rotate together. A high-frequency circuit is connected to the fixed outer side of a conductive slip ring and provides high-frequency current to the sandwich piezoelectric ultrasonic transducer through the rotatable inner side. Compared to traditional drilling sampling systems, ultrasonic assistance reduces friction between the sample particles and the drill body, allowing the drill body to reach a higher position while maintaining the same rotational speed. This makes the system more suitable for use in situations with weak gravity on extraterrestrial bodies, reducing sampling difficulty and improving sampling efficiency. However, this device cannot be directly applied to the machining of large-diameter deep-hole piston rods. Utility Model Content

[0004] In order to reduce the cutting resistance and improve the drilling accuracy when drilling deep holes, the technical solution adopted by the utility model is: an ultrasonic assisted deep hole drilling device, including a slide, a machine tool spindle, an ultrasonic deep hole drilling mechanism, and a support clamping mechanism;

[0005] The machine tool spindle moves along the slide to drive the ultrasonic deep hole drilling mechanism to perform vibration intermittent drilling on the piston rod workpiece;

[0006] The ultrasonic deep hole drilling mechanism is detachably connected to the machine tool spindle and includes an ultrasonic horn and a gun drill arbor. The ultrasonic deep hole drilling mechanism is used to convert electrical energy into ultrasonic waves, which are transmitted to the gun drill arbor via the ultrasonic horn. A resonance point is formed at the tip of the gun drill arbor, which, after being combined with the movement direction of the machine tool spindle, generates high-frequency vibration in the drilling direction, thereby performing vibration intermittent drilling on the piston rod workpiece.

[0007] The supporting and clamping mechanism is arranged outside the gun drill arbor and piston rod workpiece, and is used for supporting the gun drill arbor and piston rod workpiece.

[0008] Based on the above, the ultrasonic deep hole drilling mechanism further includes an ultrasonic deep hole drilling tool holder and an ultrasonic transducer;

[0009] The ultrasonic deep hole drilling tool holder is connected to the machine tool spindle bolt, the ultrasonic horn is connected to the outer end of the ultrasonic deep hole drilling tool holder, and the outer end of the ultrasonic horn is provided with a spring chuck for mounting the gun drill tool holder;

[0010] The ultrasonic transducer is arranged inside the ultrasonic deep hole drilling tool holder and is used to convert electrical energy into ultrasonic waves and transmit the ultrasonic horn to the ultrasonic horn.

[0011] Based on the above, the ultrasonic deep hole drilling mechanism also includes an ultrasonic energy transmission transmitting module, an ultrasonic energy transmission receiving module and an ultrasonic electrical control unit;

[0012] The ultrasonic energy receiving module is arranged on the outer circle of the ultrasonic horn through a mounting bracket. The ultrasonic energy receiving module is connected to the ultrasonic energy transmitting module. The ultrasonic energy transmitting module is connected to the ultrasonic electrical control unit through a power line.

[0013] Based on the above, an ultrasonic energy transmission module fixing bracket is further provided on the outside of the ultrasonic energy transmission module.

[0014] Based on the above, in order to smoothly support and clamp, the support and clamping mechanism includes a gun drill arbor support guide sleeve arranged on the outside of the gun drill arbor, a center frame arranged on the outside of the piston rod workpiece, and a floating two-jaw chuck clamped at one end of the piston rod workpiece.

[0015] Based on the above, in order to improve the processing accuracy, the machine tool spindle, the ultrasonic deep hole drilling tool holder, the ultrasonic amplitude transformer and the gun drill tool holder are coaxially arranged.

[0016] Based on the above, a connecting plate for connecting to the ultrasonic deep hole drilling tool holder is provided on the machine tool spindle.

[0017] The present invention has substantial features and progress over the prior art. Specifically, the ultrasonic-assisted deep-hole drilling device provided by the present invention converts electrical energy into ultrasonic energy, transmits it to the gun drill tip through an ultrasonic amplitude transformer to form resonance, thereby obtaining a large impact acceleration, and then combines it with the movement direction of the machine tool spindle to form high-frequency vibration along the drilling direction, thereby realizing discontinuous processing, reducing heat generation, having a good chip breaking effect, facilitating chip removal and heat dissipation, and improving the service life of the gun drill arbor.

[0018] At the same time, the device can also significantly reduce the drilling resistance of the gun drill, reduce the machine tool load, reduce deformation, improve drilling efficiency and drilling accuracy, ensure the coaxiality of the inner and outer circles, and ultimately eliminate deep hole correction. At the same time, it can reduce tool wear, increase feed rate, and comprehensively improve deep hole drilling efficiency by about 40%.

[0019] Furthermore, the device unifies the machining datum for fine turning and grinding, improving grinding efficiency. At the same time, the device optimizes the machining process, improves the machining datum, and combines deep hole turning and fine turning processes, unifying the machining datum for both, thereby improving machining accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the ultrasonic-assisted deep hole drilling device provided by the utility model.

[0021] In the figure: 1. Machine tool spindle; 2. Slide; 3. Adapter plate; 4. Ultrasonic deep hole drilling tool holder; 5. Ultrasonic energy transmission transmitter module fixing bracket; 6. Ultrasonic energy transmission transmitter module; 7. Ultrasonic transducer; 8. Ultrasonic energy transmission receiver module; 9. Spring chuck; 10. Ultrasonic amplitude transformer; 11. Gun drill tool rod; 12. Gun drill tool rod support guide sleeve; 13. Ultrasonic electrical control unit; 14. Center frame; 15. Piston rod workpiece; 16. Displacement sensor mounting hole; 17. Floating two-jaw chuck. DETAILED DESCRIPTION

[0022] The technical solution of the present utility model is further described in detail below through specific implementation methods.

[0023] Example 1

[0024] This embodiment provides an ultrasonic assisted deep hole drilling device, such as Figure 1 As shown, it includes a slide 2, a machine tool spindle 1, an ultrasonic deep hole drilling mechanism, and a support and clamping mechanism.

[0025] The machine tool spindle 1 moves along the slide 2 to drive the ultrasonic deep hole drilling mechanism to perform vibration intermittent drilling on the piston rod workpiece 15 .

[0026] The ultrasonic deep hole drilling mechanism is detachably connected to the machine tool spindle 1 and includes an ultrasonic horn 10 and a gun drill arbor 11. The ultrasonic deep hole drilling mechanism converts electrical energy into ultrasonic waves, which are then transmitted to the gun drill arbor 11 via the ultrasonic horn 10. This ultrasonic wave forms a resonance point at the tip of the gun drill arbor 11. This resonance, combined with the direction of motion of the machine tool spindle 1, generates high-frequency vibrations in the drilling direction, intermittently vibrating the piston rod workpiece 15 to form a displacement sensor mounting hole 16 for mounting the displacement sensor.

[0027] The supporting and clamping mechanism is arranged outside the gun drill arbor 11 and the piston rod workpiece 15 to support the gun drill arbor 11 and the piston rod workpiece 15 .

[0028] Specifically, in this embodiment, the ultrasonic deep hole drilling mechanism further includes an ultrasonic deep hole drilling handle 4 , an ultrasonic transducer 7 , an ultrasonic energy transmission transmitting module 6 , an ultrasonic energy transmission receiving module 8 and an ultrasonic electrical control unit 13 .

[0029] The ultrasonic deep hole drilling shank 4 is bolted to the machine tool spindle 1. The ultrasonic horn 10 is connected to the outer end of the ultrasonic deep hole drilling shank 4. A spring chuck 9 is provided at the outer end of the ultrasonic horn 10 for mounting the gun drill shank 11. The ultrasonic transducer 7 is disposed within the ultrasonic deep hole drilling shank 4 and is used to convert electrical energy into ultrasonic waves and transmit them to the ultrasonic horn 10.

[0030] The ultrasonic energy receiving module 8 is mounted on the outer circle of the ultrasonic horn 10 through a mounting bracket. The ultrasonic energy receiving module 8 is connected to the ultrasonic energy transmitting module 6. The ultrasonic energy transmitting module 6 is connected to the ultrasonic electrical control unit 13 through a power line.

[0031] In this embodiment, in order to provide stable support and clamping, the support and clamping mechanism includes a gun drill arbor support guide sleeve 12 arranged on the outside of the gun drill arbor 11, a center frame 14 arranged on the outside of the piston rod workpiece 15, and a floating two-jaw chuck 17 clamped at one end of the piston rod workpiece 15.

[0032] In this embodiment, the spring collet 9 is an ER40 spring collet.

[0033] Example 2

[0034] This embodiment provides an ultrasonic-assisted deep hole drilling device. The main difference from Embodiment 1 is that in this embodiment, an ultrasonic energy transmission module fixing bracket 5 is further provided on the outer side of the ultrasonic energy transmission module 6 .

[0035] Example 3

[0036] This embodiment provides an ultrasonic-assisted deep-hole drilling device. The main difference from Embodiment 1 is that, to improve machining accuracy, a connecting plate 3 for connecting to an ultrasonic deep-hole drilling toolholder 4 is provided on the machine tool spindle 1. The machine tool spindle 1, the ultrasonic deep-hole drilling toolholder 4, the ultrasonic horn 10, and the gun drill toolholder 11 are coaxially arranged.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and not to limit it; although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents; without departing from the spirit of the technical solution of the utility model, they should all be included in the scope of the technical solution for which protection is requested in the utility model.

Claims

1. An ultrasonic-assisted deep hole drilling device, characterized in that: Including slide, machine tool spindle, ultrasonic deep hole drilling mechanism, support and clamping mechanism; The machine tool spindle moves along the slide to drive the ultrasonic deep hole drilling mechanism to perform vibration intermittent drilling on the piston rod workpiece; The ultrasonic deep hole drilling mechanism is detachably connected to the machine tool spindle and includes an ultrasonic horn and a gun drill arbor. The ultrasonic deep hole drilling mechanism is used to convert electrical energy into ultrasonic waves, which are transmitted to the gun drill arbor via the ultrasonic horn. A resonance point is formed at the tip of the gun drill arbor, which, after being combined with the movement of the machine tool spindle, generates high-frequency vibration in the drilling direction, thereby performing vibration intermittent drilling on the piston rod workpiece. The supporting and clamping mechanism is arranged outside the gun drill arbor and piston rod workpiece, and is used for supporting the gun drill arbor and piston rod workpiece.

2. The ultrasonic-assisted deep hole drilling device according to claim 1, characterized in that: The ultrasonic deep hole drilling mechanism also includes an ultrasonic deep hole drilling tool holder and an ultrasonic transducer; The ultrasonic deep hole drilling tool holder is connected to the machine tool spindle bolt, the ultrasonic horn is connected to the outer end of the ultrasonic deep hole drilling tool holder, and the outer end of the ultrasonic horn is provided with a spring chuck for mounting the gun drill tool holder; The ultrasonic transducer is arranged inside the ultrasonic deep hole drilling tool holder and is used to convert electrical energy into ultrasonic waves and transmit the ultrasonic horn to the ultrasonic horn.

3. The ultrasonic-assisted deep hole drilling device according to claim 2, characterized in that: The ultrasonic deep hole drilling mechanism also includes an ultrasonic energy transmission transmitting module, an ultrasonic energy transmission receiving module and an ultrasonic electrical control unit; The ultrasonic energy receiving module is arranged on the outer circle of the ultrasonic horn through a mounting bracket. The ultrasonic energy receiving module is connected to the ultrasonic energy transmitting module. The ultrasonic energy transmitting module is connected to the ultrasonic electrical control unit through a power line.

4. The ultrasonic-assisted deep hole drilling device according to claim 3, characterized in that: An ultrasonic energy transmission module fixing frame is also provided on the outside of the ultrasonic energy transmission module.

5. The ultrasonic-assisted deep hole drilling device according to claim 4, characterized in that: The supporting and clamping mechanism includes a gun drill arbor supporting guide sleeve arranged outside the gun drill arbor, a center frame arranged outside the piston rod workpiece, and a floating two-jaw chuck clamped at one end of the piston rod workpiece.

6. The ultrasonic-assisted deep hole drilling device according to claim 5, characterized in that: The machine tool spindle, the ultrasonic deep hole drilling tool holder, the ultrasonic amplitude transformer and the gun drilling tool holder are coaxially arranged.

7. The ultrasonic-assisted deep hole drilling device according to claim 6, characterized in that: The machine tool spindle is provided with a connecting plate for connecting to the ultrasonic deep hole drilling tool holder.

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