Horizontal ultrasonic numerical control deep hole drilling machine

Abstract

The invention discloses a horizontal ultrasonic numerical control deep hole drilling machine. The deep hole drilling machine comprises a machine body, a drill rod box, an ultrasonic drilling device, a numerical control system, a workpiece bracket, a hydraulic center frame, a feeding unit, an oil supply device, a cooling unit and a hydraulic unit. The ultrasonic high-frequency vibration technology and the numerical control deep hole drilling technology are combined, and the traditional deep hole machining technology is overturned. The design of the lathe bed supports front-back movement and left-right translation of a workpiece, and various machining requirements are met. The folding type drill rod bracket solves the problem that the rigidity of the drill rod is insufficient in the long and thin hole machining process, and the machining range is expanded. The three-stage filtering and cooling unit and the large-flow and high-pressure oil pump ensure sufficient cooling and smooth chip removal, and a foundation is provided for efficient and high-quality deep hole machining. According to the horizontal ultrasonic numerical control deep hole drilling machine, efficient, high-precision and high-quality deep hole machining is achieved, many problems in traditional deep hole machining are solved, and the horizontal ultrasonic numerical control deep hole drilling machine has wide application prospects and remarkable technical advantages.

Description

Technical Field

[0001] The present invention relates to the field of deep hole machining of hard, brittle, sticky and other difficult-to-machine materials, and particularly relates to an ultrasonic numerically controlled deep hole drilling machine. Background Art

[0002] In modern manufacturing, deep hole machining has always been a technical difficulty and a process bottleneck, especially for the deep hole machining of hard, brittle, sticky and other difficult-to-machine materials. Traditional deep hole machining methods face many challenges in practical applications. For example, problems such as drill bit chip entanglement, drill bit breakage, and the drill bit being stuck by adhered chips resulting in machine tool alarms frequently occur. These problems not only increase the operation difficulty but also significantly reduce the machining efficiency. In addition, due to the difficulty of cutting hard materials, the easy cracking of brittle materials, and the easy generation of built-up edges and scale-like chips in sticky materials, it is difficult to guarantee the machining quality and the rejection rate remains high. Especially in terms of straightness control, traditional deep hole machining often fails to meet the national standard requirement of 0.4 mm / m, and some workpieces even have a deviation of up to 3 mm / m. To solve these problems, existing technologies usually adopt the method of increasing the outer diameter of the workpiece or adding subsequent rectification processes, but this not only increases the material cost and machining time but also seriously affects the production efficiency. At the same time, problems such as large tool wear, short tool life, and poor cooling and chip removal further limit the improvement of the efficiency and quality of deep hole machining.

[0003] With the continuous improvement of the requirements for deep hole machining accuracy and efficiency in industrial manufacturing, especially the increasing demand for deep hole machining of various materials (including circular and square workpieces) in the range of 3 mm to 30 mm in diameter, traditional machining methods can no longer meet the needs of modern manufacturing.

[0004] Under this background, there is an urgent need for a deep hole machining equipment and technical solution that can break through the limitations of existing technologies. Summary of the Invention

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention provides an ultrasonic numerically controlled deep hole drilling machine to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A horizontal ultrasonic numerically controlled deep hole drilling machine, the deep hole drilling machine includes a machine body, a drill pipe box, an ultrasonic drilling device, a numerical control system, a workpiece bracket, a hydraulic center rest, a feed unit, an oil feeder, a cooling unit and a hydraulic unit, wherein,

[0007] The machine body includes two bed bodies with a high-low section layout, namely a first bed body and a second bed body;

[0008] The first bed body is provided with a first guide rail, on which the feeding unit, the drill pipe box, a plurality of drill pipe brackets and a guiding frame are sequentially installed; the drill pipe box is fed on the first guide rail through the feeding unit, and the ultrasonic drilling device is connected to the drill pipe box; the ultrasonic drilling device includes a drill pipe, the drill pipe passes through a plurality of the drill pipe brackets and the guiding frame, the oil feeder is installed in the guiding frame, the drill pipe brackets are used to support the drill pipe, and the guiding frame is used to guide the drilling of the drill pipe;

[0009] The second bed body is provided with a second guide rail, on which a feeding support plate, a workpiece support and a hydraulic center rest are sequentially installed; the workpiece support is used to install and fix the workpiece, and the hydraulic center rest is used to support the workpiece;

[0010] The numerical control system is connected to the ultrasonic drilling device, the feeding unit, the cooling unit and the hydraulic unit, and is used for setting the deep hole drilling processing parameters and controlling the processing of the ultrasonic drilling device, the feeding speed, the coolant pressure, and the hydraulic control;

[0011] The cooling unit is connected to the oil feeder and is used to cool the workpiece;

[0012] The hydraulic unit is arranged on the side of the bed body and is connected to the hydraulic center rest and the oil feeder.

[0013] Preferably, the ultrasonic drilling device further includes an ultrasonic generator, an ultrasonic deep hole drill tool shank and a wireless energy transmission device, and the ultrasonic generator is used to convert electrical energy into ultrasonic energy and transmit it to the ultrasonic deep hole drill tool shank through the wireless energy transmission device.

[0014] Preferably, the ultrasonic deep hole drill tool shank includes a horn, a transducer and a piezoelectric ceramic component, the horn is respectively connected to the drill pipe and the transducer, and the piezoelectric ceramic component is installed inside the transducer.

[0015] Preferably, the wireless energy transmission device includes a super energy ultrasonic wireless transmitting device and a super energy ultrasonic wireless receiving device that match each other, the ultrasonic wireless transmitting device is connected to the ultrasonic generator, and the ultrasonic wireless receiving device is connected to the ultrasonic deep hole drill tool shank.

[0016] Preferably, the ultrasonic deep hole drill tool shank receives ultrasonic energy and drives the drill pipe to perform crushing and removal processing on the workpiece at a vibration frequency of 20,000 to 50,000 times per second.

[0017] Preferably, the workpiece support adopts a V-shaped self-centering support.

[0018] Preferably, the hydraulic steady rest comprises two sets of steady rest brackets for auxiliary support of long and heavy workpieces and ensuring concentricity at three positions at both ends and in the middle of the workpiece.

[0019] Preferably, the feeding unit comprises two groups respectively for feeding of the drill pipe box and the workpiece, including a feeding motor and a ball screw connected to each other. The ball screw is arranged between two guide rails of the first guide rail and the second guide rail. The drill pipe box and the feeding platen are mounted on the ball screw to drive the ultrasonic drilling device and the workpiece to feed through the ball screw.

[0020] Preferably, the drill pipe box is internally provided with an AC servo spindle motor of more than 15 kW, and the rotational speed range is from 60 r / min to 6000 r / min.

[0021] Preferably, the cooling unit adopts a ground fuel tank structure and is equipped with a three-stage filtering system, including coarse filtering, magnetic separator filtering and fine filtering.

[0022] The horizontal ultrasonic numerically controlled deep hole drilling machine provided by the present invention combines ultrasonic high-frequency vibration technology with numerically controlled deep hole drilling technology, subverting the traditional deep hole processing technology. The bed design supports the forward and backward movement and left and right translation of the workpiece, meeting various processing requirements. The foldable drill pipe bracket solves the problem of insufficient rigidity of the drill pipe in the processing of slender holes and expands the processing range. The three-stage filtering and cooling unit and the high-flow and high-pressure oil pump ensure sufficient cooling and smooth chip removal, providing a basis for efficient and high-quality deep hole processing. The horizontal ultrasonic numerically controlled deep hole drilling machine of the present invention realizes efficient, high-precision and high-quality deep hole processing, solves many problems in traditional deep hole processing, and has broad application prospects and remarkable technical advantages. Description of the Drawings

[0023] Figure 1 is a schematic diagram of the overall structure from one angle of the present invention;

[0024] Figure 2 is a schematic diagram of the overall structure from another angle of the present invention;

[0025] Figure 3 is a schematic diagram of the installation structure of the ultrasonic drilling device and the drill pipe box of the present invention;

[0026] Figure 4 is a schematic diagram of the structure of the ultrasonic wireless transmitting device in the ultrasonic drilling device of the present invention;

[0027] The reference numerals are: 1, the first bed body; 2, the second bed body; 3, the first guide rail; 4, the second guide rail; 5, the ultrasonic drilling device; 6, the drill pipe; 7, the drill pipe bracket; 8, the guide frame; 9, the oil feeder; 10, the hydraulic center rest; 11, the workpiece bracket; 12, the ball screw; 13, the drill pipe box; 14, the feed motor; 15, the cooling motor; 16, the cooling circulation oil tank; 17, the clamping motor; 18, the drill pipe guide sleeve; 19, the feed support plate; 20, the workpiece; 21, the transducer; 22, the wireless energy transmission device; 23, the horn; 24, the filtration system; 25, the ultrasonic wireless transmitting device; 26, the circuit. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] As Figure 1 and Figure 2 shown, the horizontal ultrasonic numerically controlled deep hole drill provided by the present invention includes a bed body, an ultrasonic drilling device, a numerical control system, a workpiece bracket 11, a hydraulic center rest 10, an oil feeder 9, a drill pipe bracket 7, a drill pipe box 13, a feed unit, a cooling unit, and a hydraulic unit. The bed body is divided into a high and a low bed body. Both the high and low bed bodies adopt linear guide rails, and the drill pipe box 13 and the workpiece 20 are fed and the supporting components are moved through the transmission of the ball screw 12. This design enables the workpiece to move both in the front and back directions and can also be translated in the left and right directions, meeting the processing requirements of central deep holes and parallel deep holes. The linear guide rail has high rigidity and high load-bearing capacity, and the ball screw 12 ensures the high precision and stability of the feed movement. In actual operation, the workpiece 20 can be precisely adjusted in position along the linear guide rail by a servo motor to adapt to the processing requirements of different diameters and lengths.

[0030] Specifically, the two-section bed bodies of the present invention are respectively a first bed body 1 and a second bed body 2. The first bed body 1 is provided with a first guide rail 3, on which a feeding unit, a drill pipe box 13, a plurality of drill pipe brackets 7 and a guide frame 8 are sequentially installed; the drill pipe box 13 feeds on the first guide rail 3 through the feeding unit, and the ultrasonic drilling device 5 is connected to the drill pipe box 13; the ultrasonic drilling device 5 includes a drill pipe 6, the drill pipe 6 passes through a plurality of drill pipe brackets 7 and the guide frame 8, an oil feeder 9 is installed in the guide frame 8, the drill pipe brackets 7 are used to support the drill pipe 6, and the guide frame 8 is used to guide the drilling of the drill pipe 6; the second bed body 2 is provided with a second guide rail 4, on which a feeding support plate 19, a workpiece bracket 11 and a hydraulic center rest 10 are sequentially installed; the feeding support plate 19 is used to install the workpiece bracket 11, the workpiece bracket 11 is used to install and fix the workpiece 20, and the hydraulic center rest 10 is used to support the workpiece 20, and the workpiece 20 is tightly fixed by a tightening motor 17.

[0031] The ultrasonic drilling device 5 of the present invention further includes an ultrasonic generator (not shown in the figure), an ultrasonic deep hole drill tool shank and a wireless energy transmission device 22. The wireless energy transmission device 22 includes an ultrasonic wireless transmitting device 25 and an ultrasonic wireless receiving device. The ultrasonic wireless transmitting device 25 is connected to the ultrasonic generator by a circuit. The wireless ultrasonic wireless transmitting device and the ultrasonic wireless receiving device are matched to transmit and receive ultrasonic waves. The ultrasonic wireless receiving device is connected to the ultrasonic deep hole drill tool shank and is arranged inside it. The ultrasonic generator is used to convert electrical energy into ultrasonic energy and transmit it to the ultrasonic deep hole drill tool shank through the wireless energy transmission device 22. The ultrasonic deep hole drill tool shank includes a horn 23, a transducer 21 and a piezoelectric ceramic component. The horn 23 is respectively connected to the drill pipe 6 and the transducer 21, and the piezoelectric ceramic component is installed inside the transducer 21. The ultrasonic deep hole drill tool shank receives ultrasonic energy and drives the drill pipe 6 to perform crushing and removal processing on the workpiece 20 at a vibration frequency of 20,000 to 50,000 times per second. The ultrasonic drilling device also has a high-speed automatic frequency sweeping and dynamic tracking function, and dynamically adjusts the output frequency according to the change of material characteristics during the processing to ensure that the ultrasonic energy is always in the best transmission state. In practical applications, the ultrasonic generator is connected to the ultrasonic wireless transmitting device by a circuit, converts electrical energy into ultrasonic vibration energy, and transmits it to the ultrasonic deep hole drill tool shank. The ultrasonic deep hole drill tool shank converts the ultrasonic vibration energy into mechanical vibration energy through the ultrasonic wireless receiving device and performs deep hole drilling at a high frequency vibration of 20,000 to 50,000 times per second. The ultrasonic deep hole drilling device has a high-speed automatic frequency sweeping and full-automatic dynamic tracking function, and dynamically adjusts the output frequency according to the change of material characteristics during the processing to ensure that the ultrasonic energy is always in the best transmission state.

[0032] The numerical control system works in coordination with the ultrasonic drilling device to quickly set parameters such as the spindle speed, feed rate, coolant pressure, ultrasonic frequency, and amplitude of the drill rod box, and adjust each parameter in real time during the machining process. The numerical control system monitors the machining status through the data acquisition module and uses the feedback control algorithm to optimize the machining parameters to ensure the stability and efficiency of the machining process. In actual operation, the numerical control system can automatically adjust relevant parameters according to the machining requirements of different materials and hole diameters. For example, the spindle speed range is 60 r / min to 6000 r / min, the feed rate range is 20 mm / min to 500 mm / min, the coolant pressure range is 0.5 MPa to 1.0 MPa, the ultrasonic frequency range is 20 kHz to 50 kHz, and the amplitude range is 1 μm to 10 μm. The setting and adjustment of these parameters can be completed through the touch screen interface of the numerical control system, which is simple and convenient to operate.

[0033] The feed unit includes two groups, which are respectively used for the feed of the drill rod box 13 and the workpiece 20. It includes a feed motor 14 and a ball screw 12 that are connected to each other. The ball screw 12 is respectively arranged between the two guide rails of the first guide rail 3 and the second guide rail 4. The drill rod box 13 and the feed support plate 19 are both installed on the ball screw 12 to drive the ultrasonic drilling device 5 to feed and the workpiece 20 to feed through the ball screw 12 respectively.

[0034] The workpiece bracket 11 adopts a V-shaped self-centering bracket, which is suitable for the quick clamping of workpieces with different diameters within a certain range. When the workpiece diameter exceeds the preset range, the bracket can be replaced to adapt to workpieces with larger or smaller diameters. The hydraulic steady rest 10 is equipped with two sets of steady rest brackets, which are used for the auxiliary support of long and heavy workpieces to ensure the concentricity of the two ends and the middle three positions of the workpiece, and reduce the alignment time. The hydraulic steady rest realizes the operation of clamping and loosening the workpiece through a hydraulic cylinder. The designs of the workpiece bracket 11 and the hydraulic steady rest 10 enable the workpiece 20 to always remain stable during the machining process, avoiding machining errors caused by vibration or offset. In actual applications, the workpiece bracket 11 can be quickly replaced to adapt to workpieces with different diameters, while the hydraulic steady rest 10 realizes automatic clamping and loosening through a hydraulic cylinder, improving the work efficiency.

[0035] The oil feeder 9 is used to support the deep-hole tool and the drill pipe, and input the coolant to the workpiece. The oil feeder realizes the movement and clamping operations through a hydraulic cylinder, and a chuck-type hydraulic chuck is provided at its front end for clamping and positioning the workpiece. The drill pipe bracket 7 of the present invention is a folding drill pipe bracket, which is installed on the first guide rail 3. When the bottom of the bracket is closed, it occupies a small auxiliary stroke, which is convenient for processing slender holes. A drill pipe guide sleeve 18 is also provided on the drill pipe bracket 7, and the drill pipe 6 passes through the drill pipe guide sleeve 18. When replacing the drill pipe 6, the drill pipe guide sleeve 18 can be replaced together, improving the operation convenience. The designs of the oil feeder and the folding drill pipe bracket solve the problems of insufficient coolant supply and insufficient drill pipe rigidity in traditional deep-hole processing. In practical applications, the oil feeder realizes automatic movement and clamping through a hydraulic cylinder to ensure that the coolant can be evenly transported to the processing area, while the folding drill pipe bracket solves the drill pipe jumping problem in the processing of slender holes through the cooperation of multiple groups of brackets.

[0036] The drill pipe box 13 of the present invention is a high-power drill pipe box, which selects an AC servo main shaft motor with a power of more than 15kW, and the speed range is 60r / min to 6000r / min, adapting to high-speed and large-feed efficient processing. The main shaft of the drill pipe box adopts a high-precision double-bearing structure, with high rigidity, high strength and good accuracy retention. It is equipped with an automatic lubrication device to lubricate the guide rail and the ball screw, extending the service life of the equipment. The ultrasonic deep-hole drill tool holder is installed on the main shaft of the drill pipe box, and the drill pipe bracket is installed on the guide rail to support the ultrasonic drill tool holder to ensure the smoothness of the processing process. The design of the high-power drill pipe box enables the machine tool to perform efficient processing under high-speed and large-feed conditions. In practical applications, the AC servo main shaft motor outputs to the reducer through a torque limiter and is connected to a high-precision ball screw to provide a large-torque, high-rigidity and high-precision feed motion, ensuring the stability and efficiency of the processing process.

[0037] The cooling unit adopts a ground oil tank structure, including a cooling motor 15 and a cooling circulation oil tank 16, and is equipped with a three-stage filtration system 24, including coarse filtration, magnetic separator filtration and fine filtration. The coolant enters the auxiliary oil tank after coarse filtration through the filter screen, then enters the clean oil tank through the liquid lifting pump and the fine filter, and finally directly supplies oil to the oil feeder through a screw pump with a large flow rate and a rated pressure of more than 1.0MPa. The machine tool is equipped with an oil chiller to ensure that the oil temperature is kept below 35°C during long-term processing, thereby improving the processing efficiency and stability. The design of the cooling unit ensures the sufficient supply and efficient filtration of the coolant. In practical applications, the coolant is subjected to coarse filtration, magnetic separator filtration and fine filtration through a three-stage filtration device to ensure the cleanliness and recycling of the coolant. The screw pump provides a large flow rate and high pressure coolant supply to ensure sufficient cooling during the processing process, while the oil chiller keeps the oil temperature constant through the refrigeration system, improving the processing efficiency and stability.

[0038] The hydraulic unit is set on the side of the bed, located in the middle at the rear of the machine tool, connecting the hydraulic steady rest and the oil feeder, and providing power for the hydraulic steady rest and the oil feeder. The hydraulic unit realizes the clamping, loosening of the workpiece and the coolant delivery operation through hydraulic cylinders, ensuring the continuity and reliability of the machining process. The design of the hydraulic unit enables the machine tool to operate stably under high-pressure conditions. In practical applications, the hydraulic unit realizes automatic clamping and loosening through hydraulic cylinders, ensuring that the workpiece always remains stable during the machining process, while the coolant delivery operation is realized through hydraulic cylinders, ensuring that the coolant can be evenly delivered to the machining area.

[0039] Based on the horizontal ultrasonic numerically controlled ultrasonic drilling machine provided by the present invention, the following implementation cases are given in this embodiment to describe the technical effects of the present invention.

[0040] The implementation cases are as follows:

[0041] 1. Comparison between conventional and ultrasonic machining of the center hole of the oil cylinder piston rod in the coal mining machinery industry:

[0042] Conventional drilling:

[0043] Material: 27SiMn

[0044] Hole diameter: 20.5mm

[0045] Hole depth: 1180mm - 1280mm

[0046] For conventional deep hole machining, a numerical control gun drill with a diameter of Φ5mm to Φ30mm is used, and the machining parameters of a Φ20.5mm machining drill bit are: rotational speed 900r - 1000r / min

[0047] Feed: 90mm - 100mm / min (the highest machining parameters in the industry)

[0048] The qualified rate of the straightness below 1mm / m is 40%

[0049] The worst straightness reaches 3mm / m (national standard 0.4mm / m)

[0050] Tool life: 12m per tip

[0051] Chip breaking situation: no chip breaking, chip entanglement;

[0052] Ultrasonic deep hole drilling:

[0053] Material: 27SiMn

[0054] Hole diameter: 20.5mm

[0055] Hole depth: 1180mm - 1280mm

[0056] Use the NBTZK2103 dual-power ultrasonic CNC gun drill with a Φ20.5mm machining drill bit.

[0057] Machining parameters: Rotational speed 1600r---1800r / min

[0058] Feed rate: 180mm--200mm / min

[0059] Straightness: Continuously drill 27 deep holes

[0060] Worst straightness 0.37mm / m (tool tip wear)

[0061] Tool life: 32m / one tool tip

[0062] Chip breaking situation: Chip debris, no chip entanglement.

[0063] 2. Automobile parts industry

[0064] Workpiece diameter 35.5mm

[0065] Workpiece length 515mm

[0066] Material: 42 chromium molybdenum quenched and tempered material (42CrMo), hardness: HRC-38

[0067] Hole diameter: 10mm

[0068] Hole depth: 515mm through hole;

[0069] Conventional deep hole machining:

[0070] Machine tool used: ZS600C deep hole drill

[0071] Due to the high hardness of the material, it cannot be drilled and can only be machined after annealing. After annealing, due to the inability to guarantee the straightness in deep hole machining, only the deep hole drilling at both ends of the workpiece can be reversed for machining.

[0072] Deep hole drilling: Spindle speed 2000r / min

[0073] Feed rate: 90mm / min

[0074] Ultrasonic CNC deep hole drill machining test:

[0075] Machine tool used: Ultrasonic CNC dual-power deep hole drill NBTZK2103

[0076] Material: 42 chromium molybdenum (42CrMo) quenched and tempered material

[0077] Quenched and tempered hardness: HRC-38 single-sided hole punching

[0078] Machining parameters: Rotational speed 2600r / min

[0079] Feed speed: 200mm / min

[0080] Straightness: 0.15mm / meter.

[0081] 3. Ultrasonic CNC deep hole drilling test:

[0082] Test machine: Ultrasonic CNC dual-power deep hole drill NBTZK2103

[0083] Material: 45# steel bar 1050, processed into diameters of 3mm, 8mm, and 30mm

[0084] (1) Φ3.02mm welded drill bit, deep hole depth 530mm, rotation speed 3500 rpm, feed speed: 20mm / min, aspect ratio 176, breaking the limit of aspect ratio of small micro holes 100, processing efficiency increased by 4-5 times year-on-year, which is impossible for conventional deep hole processing;

[0085] (2) 8mm diameter deep hole processing, hole depth 1050mm, through hole, welded drill bit, speed 2200 rpm, feed 80mm / min. The straightness deviation of the inlet and outlet is within 0.1mm / meter;

[0086] (3) 30mm diameter deep hole processing, hole depth 600mm, rotation speed 2000r / min, feed speed 500mm / min. (limit value);

[0087] Conventional deep hole processing: speed 400-600, feed 40-60mm / min.

[0088] Based on the above comparison, the present invention has overturned the deep hole processing technology and greatly improved the processing efficiency by 2-10 times (depending on different materials and different hole diameters). The chip removal is smooth, and the auxiliary processing time is reduced. Due to the ultrasonic processing mechanism, while the processing is efficient and the processing quality is improved, the tool life is increased by 3-4 times.

[0089] In summary, the present invention realizes efficient, high-precision and high-quality deep hole processing by combining ultrasonic high-frequency vibration technology with CNC deep hole drilling technology. Specifically, the mechanical impact of 20,000 to 50,000 times per second of ultrasonic high-frequency vibration significantly reduces the actual contact time between the tool and the workpiece, avoids the phenomenon of tool letting go, and the straightness can reach 0.1mm / meter to 0.4mm / meter or less, which is better than the national standard (0.4mm / meter). In addition, ultrasonic processing destroys the formation conditions of built-up edge and scale, and improves the quality of the processed surface. The cutting fluid is instantly atomized under the action of ultrasonic high-frequency vibration, taking away the cutting heat, and the tool life is increased by 3 to 5 times, saving tool cost and replacement time. At the same time, the design of the cooling unit and the hydraulic unit ensures sufficient cooling and smooth chip removal, solving many problems in traditional deep hole processing.

[0090] The following points should be noted: First, in the description of the present invention, it should be noted that unless otherwise specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense, which can be mechanical connection or electrical connection, or the internal communication of two components, and can be directly connected. The terms "upper", "lower", "left", "right", etc. are only used to represent the relative positional relationship. When the absolute position of the object being described changes, the relative positional relationship may change;

[0091] Second, in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are involved. For other structures, reference can be made to the general design. Without conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0092] Finally, the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A horizontal ultrasonic CNC deep hole drilling machine, characterized in that: The deep hole drilling machine comprises a bed, a drill rod box (13), an ultrasonic drilling device (5), a numerical control system, a workpiece bracket (11), a hydraulic center frame (10), a feeding unit, an oiler (8), a cooling unit and a hydraulic unit, wherein: The bed body comprises two bed bodies with high and low sections, namely a first bed body (1) and a second bed body (2); The first bed (1) is provided with a first guide rail (3), on which the feed unit, the drill rod box (13), a plurality of drill rod brackets (7) and a guide frame (8) are sequentially mounted; the drill rod box (13) is fed on the first guide rail (3) through the feed unit, and the ultrasonic drilling device (5) is connected to the drill rod box (13); the ultrasonic drilling device (5) comprises a drill rod (6), the drill rod (6) passes through a plurality of the drill rod brackets (7) and the guide frame (8), the oiler (9) is mounted in the guide frame (8), the drill rod bracket (7) is used to support the drill rod (6), and the guide frame (8) is used to guide the drill rod (6) for drilling; The second bed (2) is provided with a second guide rail (4), on which a feed pallet (19), a workpiece bracket (11) and a hydraulic center frame (10) are sequentially mounted; the feed pallet (19) is used to mount the workpiece bracket (11), the workpiece bracket (11) is used to mount and fix a workpiece (20), and the hydraulic center frame (10) is used to support the workpiece (20); The numerical control system is connected to the ultrasonic drilling device (5), the feed unit, the cooling unit and the hydraulic unit, and is used for deep hole drilling processing parameter setting and ultrasonic drilling device processing control, feed speed, coolant pressure, and hydraulic control; The cooling unit is connected to the oil applicator (9) to cool the workpiece; The hydraulic unit is arranged on the side of the bed and is connected to the hydraulic center frame (10) and the oil dispenser (9).

2. The horizontal ultrasonic CNC deep hole drilling machine according to claim 1 is characterized in that: The ultrasonic drilling device also includes an ultrasonic generator, an ultrasonic deep hole drill handle and a wireless energy transmission device. The ultrasonic generator is used to convert electrical energy into ultrasonic energy and transmit it to the ultrasonic deep hole drill handle through the wireless energy transmission device.

3. The horizontal ultrasonic CNC deep hole drilling machine according to claim 2 is characterized in that: The ultrasonic deep hole drill handle comprises a horn (23), a transducer (21) and a piezoelectric ceramic component, wherein the horn (23) is connected to the drill rod (6) and the transducer (21) respectively, and the piezoelectric ceramic component is installed inside the transducer (21).

4. The horizontal ultrasonic CNC deep hole drilling machine according to claim 2 is characterized in that: The wireless energy transmission device 22 includes a super-powered ultrasonic wireless transmitting device and a super-powered ultrasonic wireless receiving device that match each other. The super-powered ultrasonic wireless transmitting device is connected to the ultrasonic generator, and the super-powered ultrasonic wireless receiving device is connected to the ultrasonic deep hole drill handle.

5. The horizontal ultrasonic CNC deep hole drilling machine according to claim 3 is characterized in that: The ultrasonic deep hole drill handle receives ultrasonic energy and drives the drill rod to crush and remove the workpiece at a vibration frequency of 20,000 to 50,000 times per second.

6. The horizontal ultrasonic CNC deep hole drilling machine according to claim 1, characterized in that: The workpiece bracket (11) is a V-shaped self-centering bracket.

7. The horizontal ultrasonic CNC deep hole drilling machine according to claim 1 is characterized in that: The hydraulic center frame (10) comprises two sets of center frame brackets, which are used to assist in supporting long and heavy workpieces and ensure that the two ends and three middle positions of the workpiece are concentric.

8. The horizontal ultrasonic CNC deep hole drilling machine according to claim 1, characterized in that: The feeding unit comprises two groups, which are respectively used for feeding a drill rod box (13) and a workpiece (20), and include a feeding motor (14) and a ball screw (12) which are connected to each other. The ball screw (12) is respectively arranged between two guide rails of the first guide rail (3) and the second guide rail (4). The drill rod box (13) and the feeding pallet (19) are both installed on the ball screw (12) so as to respectively drive the ultrasonic drilling device (5) to feed and the workpiece (20) to feed through the ball screw (12).

9. The horizontal ultrasonic CNC deep hole drilling machine according to claim 1, characterized in that: The drill rod box (13) is internally provided with an AC servo spindle motor of more than 15 kW, and the rotation speed ranges from 60 r / min to 6000 r / min.

10. The horizontal ultrasonic CNC deep hole drilling machine according to claim 1, characterized in that: The cooling unit adopts an above-ground oil tank structure and is equipped with a three-stage filtration system, including coarse filtration, magnetic separator filtration and fine filtration.

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