TWI781601B - Machine tool having coaxial jet flow generator and mechanical machine using the same - Google Patents

Abstract

The present invention provides a machine tool having coaxial jet flow generator comprising a driving device for generating a rotating power, a coaxial jet flow module, and a machining tool module. The coaxial jet flow module comprises a shaft, and a plurality of impeller units sequentially coupled to the shaft. The shaft is coupled to the driving device for receiving the rotating power and rotates the plurality of impeller units. A fluid is received by the coaxial jet flow module and is boosted to form a supercharged fluid after passing through the plurality of impeller units. The machining tool module coupled to the coaxial jet flow module for receiving the supercharged fluid further has a processing tool for processing an object. Alternatively, the present invention further provides a mechanical machine having the coaxial jet flow generator for providing coaxial jet flow during the EDM processing.

Description

Coaxial Jet Flow Generating Processing Device and Its Mechanical Processing Device

The invention relates to a high-pressure cooling and processing fluid supply technology for machine tools, in particular to a coaxial jet flow generation processing device capable of generating axial jet flow and its mechanical processing device.

In the metal cutting process, the heat/friction conditions generated by the contact between the workpiece and the tool will be an important factor affecting the metal cutting efficiency. Therefore, in the conventional technology, the high-pressure central jet is generally used to improve the heat/friction conditions in the machining process (for example: milling, drilling, cutting), so that the cutting force of the tool, the surface roughness of the workpiece, the shape of the chip and the wear of the tool are all improved. get better results.

In addition, in fine hole electric discharge machining and wire cutting electric discharge machining, the removal of processing chips is a key factor affecting the processing quality and efficiency, because the processing chips remaining in the narrow gap (several microns to hundreds of microns) between the electrode and the workpiece Short circuit or abnormal discharge may occur due to poor discharge, which will lead to inefficient discharge machining and affect the processing quality. Therefore, in fine hole electric discharge machining and wire cutting electric discharge machining, it is almost the only effective method to remove machining chips through the center jet.

The central water outlet mechanism is currently widely used in machining (drilling and milling) and electrical discharge machining industries. During high-speed machining, the spindle through-type coolant supply can effectively supply the machining fluid to the processing area to improve workpiece quality, yield, and machining. Efficiency, etc. can be greatly improved, and it is an essential function in fine hole discharge and wire cutting discharge machining. Between the tool electrode and the workpiece (digital Micron to hundreds of microns) take away the processing chips and cooling effect in the extremely small gap, and the efficiency of the machining fluid renewal is a very important key to affect the processing characteristics.

Although the center jet flow is currently used, there are many limitations and disadvantages of the center jet flow: 1. An external high-voltage motor (consumable) pump is required, 2. The pressure caused by the pipeline transportation connecting the hollow spindle and the pump cannot be avoided. Loss (energy consumption), 3. Need to have the central water outlet structure of hollow main shaft and rotary joint (existing commercially available structure is very complicated and expensive); The processing chips are removed, but the gap between the electrode and the workpiece is very narrow during the removal process, so it is easy to generate a secondary discharge on the hole wall and outlet to form a tapered hole.

In addition, although the commonly used fine-hole electric discharge machining has many advantages such as machining difficult-to-machine metals such as superhard alloys and superalloys, and machining high-aspect-ratio holes, it also has slow machining speed, large electrode consumption, and can only process conductive materials. shortcoming. Compared with mechanical drilling, although it is not easy to process difficult-to-machine metals such as superhard alloys, the drilling efficiency of general metals is high and the processing cost is much lower than that of fine-hole discharge. Widely used; both mechanical processing and fine hole discharge have significant advantages, so how to design a new generation of center jet flow mechanism that can take into account the advantages of machining and fine hole discharge is also an important issue for the development of equipment.

To sum up the above, there is a need for a coaxial jet flow generating processing device to solve the problems of conventional machining and electrical discharge machining.

The present invention provides a coaxial jet flow generation processing device and its mechanical processing device, which provides the rotation power of the processing tool (such as: the electrode of electric discharge machining or the tool of machining) and applies a positive pressure to a fluid through the rotation power of the processing spindle. , can reduce the number of rotating mechanisms and save pumps. In addition, the present invention can reduce the pipe flow pressure loss by generating the jet flow at the end of the machining spindle, and by The water enters sideways to simplify the machining spindle structure. Through the design of the invention, the integrity and shape precision of the tool can be improved. In the application field of electrical discharge machining, the invention can promote a constant transverse discharge gap and improve machining accuracy and stability.

The present invention provides a coaxial jet flow generation processing device and its mechanical processing device. By using the processing liquid containing two phases of gas and liquid, the fluid can be effectively injected into the processing position in the processing of micro-diameter or deep holes to achieve slag removal. with lubricating effect. In addition, the gas can also be a combustion-supporting gas, such as oxygen, which can be mixed with high-pressure fluid through the combustion-supporting gas to burn and release heat during deep-hole electric discharge processing. The heat released during processing contributes to the efficiency of deep-hole or electric discharge cutting.

The present invention provides a coaxial jet flow generation processing device and its mechanical processing device. By replacing the module, it can achieve the functions of combining mechanical processing, wire-cut EDM and fine hole EDM on the same machine. Combined with the above The advantages of the three allow users to choose the best processing method in different application scenarios. In addition, the present invention can realize the function of central water outlet even on a general machine (without hollow main shaft) by means of modularized mechanism.

In one embodiment, the present invention provides a coaxial jet flow generating and processing device, which includes a driving device, a coaxial jet flow module and a processing module. The driving device is used to provide a rotational power. The coaxial jet module has a rotating shaft and a plurality of impeller units connected in series with the rotating shaft. The rotating shaft is coupled with the driving device to receive the rotating power. Rotate, and then drive the plurality of impeller units to rotate, the coaxial jet flow module receives a fluid, so that the fluid enters the plurality of impeller units in sequence, and then forms a pressurized fluid. The processing tool module is coupled with the coaxial jet flow module to receive the pressurized fluid, and the processing tool module has a processing tool for processing an object.

In another embodiment, the present invention provides a machining device including a pair of driving devices, a pair of coaxial jet modules, and a wire electrode. The pair of driving devices respectively provide a rotational power. The pair of coaxial jetting modules are respectively coupled to one of the drive devices, and the pair of coaxial jetting modules are separated by a specific distance. Each coaxial jetting module has a rotating shaft and a plurality of them are sequentially connected in series with the rotating shaft. A plurality of impeller units, the rotating shaft is coupled with the driving device to receive the rotational power to rotate, and then drive the plurality of impeller units to rotate, the coaxial jet flow module receives a fluid, so that the fluid enters the plurality of The impeller unit, in turn, forms a pressurized fluid. The wire electrode runs through the pair of coaxial jet flow modules, and the pressurized fluid discharged from each coaxial jet flow module covers the outer surface of the wire electrode.

2~2r: coaxial jet flow generation processing device

20: Drive device

21: Coaxial jet module

210: Outer shell

210a: guide channel

211: Shaft

2110: hollow channel

2111: end

2112: Runner

2113: sub-runner

212: impeller unit

212a: impeller

212b: Diffusion plate

2120: Concave space

2121: Fluid inlet

2122: Fluid outlet

2123: blade

2124: impeller bottom plate

2125: Approach

213: Bearing

22, 22a, 22b, 22c, 22d: processing tool modules

220b: Tool collet

221b: lock sleeve

222b: Gap

223: High pressure fluid channel

224: Processing tool channel

2240: groove structure

225: drainage channel

226: drainage channel

228: Processing tool channel

23, 23a, 23b, 23c, 23d: processing tools

230: fluid channel

231: end

24: water stop beans

26: Eye mold module

260: eye model

261: outer cover

4: Machining device

401: The first electrode rolling wheel module

402: The second electrode rolling wheel module

5: Gas supply source

90: Fluid

90a: gas

91, 91b: pressurized fluid

92: coaxial swirl

93: buffer fluid

S: storage space

P1~P4: area

OB: object

DH: deep hole

O: spout

1A to 1E are schematic diagrams of different embodiments of the coaxial jet flow generation and processing device of the present invention.

Fig. 2 is a schematic diagram of processing an object by a processing tool.

Fig. 3 is a schematic diagram of another embodiment of the coaxial jet flow generating and processing device of the present invention.

Fig. 4A is a schematic diagram of another embodiment of the coaxial jet flow generation processing device of the present invention.

Fig. 4B is a schematic diagram of another embodiment of the coaxial jet flow generating and processing device of the present invention.

Fig. 4C is a schematic diagram of another embodiment of the coaxial jet flow generation processing device of the present invention.

FIG. 4D is a schematic diagram of the coaxial jet generation processing device holding the wire electrode of the present invention.

FIG. 4E and FIG. 4F are schematic diagrams of different embodiments of the coaxial jet flow generation processing device of the present invention.

Fig. 5A is a schematic diagram of an embodiment of the machining device of the present invention.

5B to 5E are schematic diagrams of different embodiments of the coaxial jet generation processing device of the present invention.

Various exemplary embodiments will be described more fully hereinafter with reference to the accompanying drawings, in which some exemplary embodiments are shown. However, inventive concepts may be embodied in many different forms and should not be construed as limited to the illustrative embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the disclosure to those skilled in the art. Category of Invention Concept. Like numbers indicate like elements throughout. The coaxial jet flow generating processing device and the machining device thereof will be described below with various embodiments and drawings, however, the following embodiments are not intended to limit the present invention.

Please refer to FIG. 1A , which is a schematic diagram of an embodiment of a coaxial jet flow generating and processing device of the present invention. The coaxial jet flow generation processing device 2 has a driving device 20 , a coaxial jet flow module 21 and a processing tool module 22 . The driving device 20 in this embodiment is a driving motor for providing rotational power. The coaxial jet module 21 is coupled to the driving device 20 for receiving the rotational power. In this embodiment, the coaxial jet module 21 includes an outer casing 210 , a rotating shaft 211 and a plurality of impeller units 212 serially connected to the rotating shaft 211 . The outer casing 210 has a housing space S covering the outer periphery of the rotating shaft 210 and a plurality of impeller units 212, and the outer casing 210 has a fluid guide channel 210a for guiding the fluid 90 (solid arrow) into the interior of the outer casing 210 .

The rotating shaft 211 is disposed in the outer shell 210 , and one end of the rotating shaft 211 is coupled to the driving device 20 , so that the rotating shaft 211 can receive the rotational power output by the driving device 20 to rotate. Two ends of the rotating shaft 211 are connected to the outer casing 210 through bearings 213 . The plurality of impeller units 212 are coupled to the rotating shaft 211 . In this embodiment, a plurality of impeller units 212 are sequentially connected in series along the central axis of the rotating shaft 211 . In this embodiment, there are four areas P1 - P4 along the axial direction of the rotating shaft 211 , and each area has an impeller unit 212 . It should be noted that the number of impeller units 212 is set according to requirements, and is not limited by the number of this embodiment.

Each impeller unit 212 includes an impeller 212a and a diffuser plate 212b. In this embodiment, the diffuser plate 212b has a concave space 2120 for accommodating the impeller 212a, so that the diffuser plate 212b is located at one side of the impeller 212a. Each impeller 212a has a fluid inlet 2121 and a plurality of fluid outlets 2122 . Wherein, a plurality of fluid outlets 2122 are arranged on the impeller bottom plate 2124 by a plurality of rings The vanes 2123 are formed, and the fluid channel is formed between adjacent vanes 2123 , and the outlet of the channel is the fluid outlet 2122 . The fluid 90 entering from the fluid inlet 2121 enters the flow channel between the vanes 2123 and is discharged from the fluid outlet 2122 to form a pressurized fluid 91 (hollow arrow). The diffuser plate 212b has guide channels 2125 for receiving the pressurized fluid discharged from the impeller 212a, and guiding the pressurized fluid 91 to the impeller units 212 at positions P2-P4.

The other end of the outer casing 210 provides the end 2111 of the rotating shaft 211 to pass through, so that the rotating shaft 211 can output power to the processing tool module 22 coupled with the end 2111 of the rotating shaft. The processing tool module 22 has a processing tool 23 for processing objects. In this embodiment, the machining tool 23 is a wire electrode used for deep-hole electrical discharge machining, and has a fluid channel 230 at its central axis for receiving the pressurized fluid 91 . In this embodiment, the end 2111 of the rotating shaft 211 has a channel 2112 for providing the pressurized fluid 91 to pass through. There is a sealing bean 24 inside the processing tool module 22 to make the processing tool 23 and the inside of the processing tool module 22 form a sealing effect, so as to ensure that the pressurized fluid 91 thrown out from the last impeller unit 212 can pass through the flow channel 2112 completely. It enters the fluid channel 230 in the processing tool 23 and then exits from the end 231 of the processing tool 23 .

Please refer to FIG. 1A and FIG. 2 , wherein FIG. 2 is a schematic diagram of processing an object by a processing tool. First, the principle of generating pressurized fluid in FIG. 2 is explained. When the driving device 20 rotates so that the rotating shaft 211 drives a plurality of impellers 212a to rotate synchronously, according to Bernoulli's law (ρ v ² /2+ρgh+P=constant; where, v is the flow velocity, ρ is the liquid density, g is the acceleration of gravity, h is the water level, and P is the pressure), the processing fluid entering the inside of the outer shell 20 from the outside of the outer shell 20 is water in this embodiment, because the rotation of the impeller 212a produces Negative pressure enters from the fluid inlet 2121 of the impeller 212a in the region P1, and the centrifugal force generated by the rotation of the impeller 212a throws the fluid 90 out of the fluid outlet 2122 to form a pressurized fluid 91 . The pressurized fluid 91 thrown out from the impeller 212a in the area P1 enters the impeller unit 212 in the area P2 through the diffuser plate 212b. According to the aforementioned principle, the pressurized fluid 91 thrown out from the impeller 212a in the area P2 enters the areas P3 and P4 The impeller unit 212 of the multi-layer impeller unit 212 generates the pressurized fluid 91 with a higher jet pressure by repeating the actions of throwing out and converging flow. Finally, the pressurized fluid 91 passes through the fluid channel 230 of the machining tool 23 . The processing tool 23 processes the object OB to form a deep hole DH on the object OB. During the process of forming the deep hole DH, the pressurized fluid 91 passes through the fluid passage 230, and then is discharged through the end 231 of the processing tool 23 so that the processing tool 23 The machining chips generated during electric discharge machining are carried out of the deep hole DH along with the pressurized fluid 91 .

Please refer to FIG. 1B , which is a schematic diagram of another embodiment of the coaxial jet flow generation and processing device 2 a. The difference from the aforementioned FIG. 1A is that there is a hollow channel 2110 inside the rotating shaft 211 , and the hollow channel 2110 has a sub-channel 2113 corresponding to the fluid inlet 2121 of at least one impeller unit. In this embodiment, each fluid inlet 2121 of the impeller unit corresponds to a sub-channel 2113 . The hollow flow channel 2110 communicates with a gas supply source 5 , and the gas supply source 5 can forcibly supply an auxiliary fluid into the hollow flow channel 2110 . In this embodiment, the auxiliary fluid is gas 90a. When the gas 90a enters the hollow channel 2110, it enters each corresponding impeller 212a through the sub-channel 2113. The gas 90a enters the interior of the impeller 212a through the fluid inlet 2121 of each impeller 212a together with the fluid 90 . With the high-speed rotation of the impeller 212a, the fluid 90 and the gas 90a are thrown out from the fluid outlet 2122 of the impeller 212a at a high speed.

The gas 90a that is thrown out forms microbubbles in the fluid cutting outside the fluid outlet 2122 , enters the next impeller unit 212 with the high-speed fluid 90 , and finally discharges to form the pressurized fluid 91 containing bubbles. In the embodiment of FIG. 1B , the gas forming the microbubbles may be a combustible gas, such as hydrogen, ammonia, natural gas, methane or ethane. The gas can also be a combustion-supporting gas, such as oxygen or air. In addition, the gas may also be a mixture of combustible gas and combustion-supporting gas. Through the combustible gas and the combustion-supporting gas mixed in the high-pressure fluid 91, the wire electrode discharge can be used to burn and release heat during processing. The released heat contributes to the efficiency of deep hole or EDM machining. In addition, it should be noted that the combustion of hydrogen and oxygen to produce water will not produce harmful gases, while the combustion of ammonia and oxygen will produce nitrogen and water, both of which produce harmless gases. Therefore, hydrogen and ammonia may be better selected gases.

Please refer to Fig. 1C, the present embodiment is basically similar to Fig. 1B, the difference is that the coaxial jet flow generating processing device 2b of this embodiment does not have an external gas supply source 5 supplying gas 90a as shown in Fig. 1B, but The air in the external environment is naturally sucked into the hollow flow channel 211 by means of negative pressure. When the impeller unit 212 is driven by the rotation of the rotating shaft 211 to rotate at a high speed, a negative pressure zone is formed around the impeller 212a due to the high-speed rotation, so that the fluid 90 is discharged from the fluid outlet 2122, and the negative pressure zone also discharges the gas 90a of the external environment through the sub-flow The channel 2114 is sucked into the hollow flow channel 2110 and then discharged from the sub-channel 2113 corresponding to each impeller 212a. The gas 90 a and the fluid 90 discharged from the rotating shaft 211 pass through a plurality of impeller units 212 to form a pressurized fluid 91 containing air bubbles.

As shown in Fig. 1D, the coaxial jet flow generation processing device 2c in this embodiment is further coupled to an electrolysis power supply 6, through which the positive pole of the electrolysis power supply is connected to each impeller 212a, and the negative pole is connected to a diffuser plate 212b made of conductive metal to form a electrolytic circuit. In this embodiment, a plurality of impeller units 212 corresponds to an electrolysis power supply 6 . Through the electrolysis loop, the fluid 90 can undergo an electrolysis reaction to generate gas. The gas generated by electrolysis is discharged from the impeller 212a along with the fluid 90, and then cut by the high-speed flowing fluid outside the fluid outlet 2122 to form a plurality of microbubbles. After being pressurized by a plurality of impeller units 212, a pressurized fluid 91 containing microbubbles is formed. . In addition, it should be noted that the electrode connection method of the electrolysis power supply 6 is not limited to FIG. 1D . In another embodiment, the negative electrode can also be connected to the impeller 212 a, and the positive electrode can be connected to the diffuser plate 212 b. In addition, in another embodiment, a device for changing the polarity may also be provided to switch the polarity according to the requirement. The coaxial jet generation processing device 2d of the embodiment shown in FIG. 1E is basically similar to the concept of electrolysis in FIG. 1D . The difference is that the electrolysis power supply 6 is electrically connected to the rotating shaft 211 made of conductive metal. The outer shell 210 made of conductive metal of the coaxial jet flow generating processing device 2 d is coupled to the rotating shaft 211 through a bearing 213 , and the bearing 213 has an insulating structure to insulate the outer shell 210 from the rotating shaft 211 . The positive and negative electrodes of the electrolysis power supply 6 are respectively electrically connected to the rotating shaft 211 and the outer shell 210 to perform electrolysis on the fluid 90 .

Please refer to FIG. 3 , which is a schematic diagram of another embodiment of the coaxial jet flow generation and processing device of the present invention. In this embodiment, it is basically similar to the structure shown in FIG. 1A. The difference is that the processing tool module 22a of the coaxial jet generation processing device 2e in this embodiment is a module for clamping a tool, and the processing tool 23a can be Machining tools such as milling cutters or drills. In this embodiment, the processing tool 23a is a drill bit, and its central shaft has a fluid channel 230a for receiving the pressurized fluid 91 . In this embodiment, the end 2111 of the rotating shaft 211 has a channel 2112 for providing the pressurized fluid 91 to pass through. Therefore, the pressurized fluid 91 thrown out from the last impeller unit 212 can completely enter the fluid channel 230a in the processing tool 23a through the flow channel 2112, and then be discharged from the end 231a of the processing tool 23a to remove chips.

Please refer to FIG. 4A , which is a schematic diagram of another embodiment of the coaxial jet flow generation and processing device of the present invention. In this embodiment, it is basically similar to the structure of Fig. 1A, the difference is that the processing tool module 22b of the coaxial jet generation processing device 2f of this embodiment is a module for clamping a tool, wherein the processing tool 23b can be Processing tools such as milling cutters or drills. In this embodiment, the processing tool 23b is a drill. In this embodiment, one end of the processing tool module 22 b further has a tool collet (or called ER collet) 220 b coupled to the end 2111 of the rotating shaft 211 . The tool collet 220b is used for clamping the processing tool 23b, and a locking sleeve 221b is provided on the periphery of the tool collet 220b to allow the tool collet 220b to securely clamp the processing tool 23b. The end 2111 of the rotating shaft 211 has a channel 2112 for providing the pressurized fluid 91 to pass through. Therefore, the pressurized fluid 91 thrown out from the last impeller unit 212 can completely enter the cutter collet 220b through the flow channel 2112, and then be discharged from the gap 222b of the cutter collet 220b to form a pressurized fluid with a high jet pressure. Remove chips.

Please refer to FIG. 4B , which is a schematic diagram of another embodiment of the coaxial jet flow generation and processing device of the present invention. In this embodiment, the rotating shaft 211 of the coaxial jet flow generating processing device 2g has a hollow channel 2110 for providing the gas 90a, such as air, combustion-supporting gas or combustible gas, to pass through. When the fluid 90 enters the impeller unit 212, since the impeller 212a of the impeller unit 212 corresponds to the sub-channel 2113, under the high-speed rotation of the impeller 212a, a speed difference is generated between the surface of the rotating shaft 211 and the hollow channel 2110, so that The gas 90 a in the hollow channel 2110 is sucked out of the sub-channel 2113 by the negative pressure and enters the fluid inlet 2121 corresponding to the impeller unit 212 . The centrifugal force generated by the rotation of the impeller 212a throws the gas 90a out of the fluid outlet 2122 and is cut into tiny bubbles by the fluid 90 around the impeller 212a, so that the high-speed fluid 90 mixes with the microbubbles to form a pressurized fluid 91b. The pressurized fluid 91b thrown out from the impeller 212a in the area P1 enters the impeller unit 212 in the area P2 through the diffuser plate 212b. According to the aforementioned principle, the pressurized fluid 91b thrown out from the impeller 212a in the area P2 enters the areas P3 and P4 The impeller unit 212, by repeating the actions of throwing out and converging, the pressurized fluid 91b with a higher jet pressure will enter the high-pressure fluid channel in the processing tool module 22d through the turbocharging effect produced by the multi-layer impeller unit 212 223, and then enter the processing tool channel 224 from the high-pressure fluid channel 223.

The processing tool module 22d has a processing tool 23d for processing objects. In this embodiment, the machining tool 23d is a wire electrode used for deep hole electric discharge machining, passing through the machining tool channel 224 . The pressurized fluid 91b is injected into the deep hole DH formed by the machining tool 23d through the machining tool channel 224 . In this embodiment, the gas forming the microbubbles may be a combustible gas, such as hydrogen, ammonia, natural gas, methane or ethane. The gas can also be a combustion-supporting gas, such as oxygen. In addition, the gas may also be a mixture of combustible gas and combustion-supporting gas. The combustible gas and combustion-supporting gas are mixed in the high-pressure fluid 91b to burn and release heat during wire discharge processing, and the heat released during processing contributes to the efficiency of deep hole or discharge cutting. In addition, it should be noted that the use of hydrogen to generate water after combustion will not produce harmful gases, while the use of ammonia will generate nitrogen and water, both of which will produce harmless gases. Therefore, hydrogen and ammonia may be better selected gases.

In addition, in another embodiment, as shown in FIG. 4C , this figure is a schematic diagram of another embodiment of the coaxial jet flow generation processing device of the present invention. The coaxial jet flow generating processing device 2h in this embodiment is basically similar to that shown in FIG. 4B , the difference is that in this embodiment, there is a drainage channel 225 on one side of the processing tool module 22d. As shown in FIG. 4D , this figure is a schematic diagram of the fixed processing tool of the coaxial jet generation processing device of the present invention. In this embodiment, the buffer fluid 93 of the external environment, for example: air, because the high-speed pressurized fluid 91b passes through the processing tool channel 224, causes a low pressure in the processing tool channel 224 to generate a pressure difference with the external environment, and then is sucked from the external environment The buffer fluid 93 enters the drainage channel 225 . The buffer fluid 93 enters the processing tool channel 224 through the drainage channel 225 and acts on the processing tool 23d, so that the outer surface of the processing tool 23d is in contact with the groove structure 2240 . In this embodiment, the groove structure 2240 is a V-shaped groove structure for accommodating the processing tool 23d. Since the blowing direction of the buffer fluid 93 constrains the processing tool 21 in the groove structure 2240, it can be ensured that the processing tool 23d will only rotate with the axis direction as the rotation axis during processing, and the processing tool 23d There will be no problem of position offset in the radial direction, so as to ensure the accuracy of deep hole diameter when processing deep hole DH. In addition, after the buffer fluid 93 enters the processing tool channel 224, it can be cut by the high-speed pressurized fluid 91b to generate microbubbles, thereby increasing the content of the microbubbles in the pressurized fluid 91b.

Please refer to FIG. 4E, in this embodiment, the coaxial jet flow generation processing device 2i has a processing tool positioning structure on the body of the processing tool module 22d, which is surrounded by a plurality of drainage channels 225 and symmetrically arranged on the On the body of the processing tool module 22d. The plurality of drainage channels 225 communicate with the processing tool channel 224 , the processing tool channel 224 allows the processing tool 23 d to pass through, and the pressurized fluid 91 b passes through the processing tool channel 224 . Since the pressurized fluid 91b is a high-speed fluid, when it passes through the processing tool channel 224 , negative pressure is generated to suck the air from the external environment into the drainage channel 225 to form the buffer fluid 93 . Since the drainage channel 225 is symmetrically arranged around the body of the processing tool module 23d, when the buffer fluid 93 enters the processing tool channel 224, the buffer fluid 93 in all directions exerts force on the processing tool 23d, so that the processing tool 23d can be Keep it in the central axis position. By maintaining the position of the processing tool 23d, the processing accuracy can be ensured during processing. As shown in Figure 4F, the coaxial jet flow generation processing device 2j in this embodiment is basically similar to that in Figure 4E, the difference is that the buffer fluid 93 in this embodiment belongs to forced air intake, not the natural air intake as shown in Figure 4E The way. In this embodiment, the buffer fluid 93 is supplied through the gas supply source 5 to achieve the effect of positioning the processing tool 23d. It should be noted that, in this embodiment, the buffer fluid 93 may also be a fluid mixed with gas and liquid in addition to gas.

Please refer to FIG. 5A and FIG. 5B , wherein, FIG. 5A is a schematic diagram of an embodiment of the mechanical processing device of the present invention; FIG. 5B is a schematic diagram of different embodiments of the coaxial jet generation processing device of the present invention. In this embodiment, the mechanical processing device 4 is a wire-cut electrical discharge processing device, which has a pair of coaxial jet flow generating processing devices 2m and 2n, corresponding to each other and separated by a specific distance, and respectively connected to the first and second electrode windings. Wheel modules 401 and 402 correspond. The first electrode roll module 401 is used to provide a processing tool 23c. In this embodiment, the processing tool 23c is a wire electrode. In this embodiment, the first electrode roll module 401 is used to guide the processing tool 23c into the pair of coaxial jet flow generating processing devices 2m. The coaxial jet flow generating processing device 2m guides the processing tool 23c through the workpiece OB and is received by another coaxial jet flow generating processing device 2n. Afterwards, the processing tool 23c is recovered through the guidance of the second electrode rolling wheel module 402 .

In the embodiment of the coaxial jet generation processing device shown in Figure 5B, it is basically similar to the structure of Figure 1A, the difference is that the coaxial jet generation processing devices 2m and 2n of this embodiment have wire grooves 235 for providing processing tools 23c By making the processing tool 23c penetrate the coaxial jet flow generating processing devices 2m and 2n. In this embodiment, the end 2111 of the rotating shaft 211 has a channel 2112 for providing the pressurized fluid 91 to pass through. Therefore, the pressurized fluid 91 thrown out from the last impeller unit 212 can completely follow the processing tool 23c through the flow channel 2112 and discharge the coaxial jet flow generating processing device 2m, and its high-pressure and high-speed liquid flow removes chips on the object OB.

In this embodiment, the processing tool 23c extended from the processing tool module 22c further passes through the eye mold module 26, and the eye mold module 26 includes an eye mold 260 and an outer cover 261, wherein the eye mold 260 is used to guide The machining tool 23c is guided such that the machining tool 23c passes the object OB. The outer cover 261 is disposed on the periphery of the eye mold 260 for guiding the high-pressure fluid 91 . In one embodiment, the processing tool 23c further rotates in the same direction as the impeller unit 212, so that the pressurized fluid 911 formed by the impeller unit 212 becomes a coaxial swirl 92 with the property of coaxial rotation with the processing tool 23c, the coaxial swirl 92 The swirl effect has the effect of guiding the processing tool 23c toward the axis of the eye mold 260 to make the processing tool 23c more stable, and the processing fluid can reach the cutting center area more easily, achieving more cooling and chip removal functions. In another embodiment, the mechanical processing device 4 shown in FIG. 5A is further combined with an automatic tool change system, combined with multiple functions of mechanical drilling, fine hole EDM and wire-cut EDM, and is performed on the same machine using rotary power. Various compound processing procedures greatly increase its added value and application fields.

Please refer to FIG. 5C. In this embodiment, it is basically similar to FIG. 5B. The difference is that in this embodiment, the coaxial jet flow generating processing devices 2o and 2p are more symmetrical around the processing tool modules 22c and have an average radial direction. The drainage channels 226 of the processing tool module 22c are respectively connected with the processing tool channels 228 for clamping the processing tool 23c, and each drainage channel 226 is also connected with the external environment. In this embodiment, the rotating shaft 211 has a wire groove 235 for passing through the processing tool 23c. The wire groove 235 is further connected with an external gas supply source 5, and the gas supply source 5 supplies the gas 90a to the processing tool through the wire groove 235. Tooling channel 228 within die set 22c. When the high-speed gas 90 a and the pressurized fluid 91 pass through the processing tool channel 228 , negative pressure is generated, and the gas from the external environment is sucked into the drainage channel 226 to form the buffer fluid 93 . Since the drainage channel 226 is symmetrically arranged around the body of the processing tool module 23c, when the buffer fluid 93 enters the processing tool channel 228, the buffer fluid 93 in all directions exerts force on the processing tool 23c, so that the processing tool 23c can be Keep it in the central axis position. By maintaining the position of the processing tool 23c, the processing accuracy can be ensured during processing.

As shown in FIG. 5D , the arrangement of the gas supply sources 5 of the coaxial jet flow generating processing devices 2 q and 2 r in this embodiment is different from that in FIG. 5C . The gas supply source 5 in FIG. 5C should communicate with the driving device 20 and the rotating shaft through the pipeline, so as to provide the gas 90a to enter the wire slot 235 in the rotating shaft 211 . In FIG. D, the pipeline of the gas supply source 5 communicates with the wire groove 235 in the rotating shaft 211 through the channel opened in the outer casing 210 . As shown in Figure 5E, the coaxial jet flow generation and processing devices 2s and 2t in this embodiment are basically similar to those in Figure 5D. way of air intake. In this embodiment, the buffer fluid 93 is supplied through the gas supply source 5 to achieve the effect of positioning the processing tool 23d. It should be noted that, in this embodiment, the buffer fluid 93 may also be a fluid mixed with gas and liquid in addition to gas.

Next, the effects that can be produced by the embodiment of the present invention assisted by microbubbles will be described. The coaxial jet flow generating processing device 2h in FIG. 4C is taken as an example for illustration. In Fig. 4C, there are two parts supplied as the source of the microbubbles, one is from the gas way entering from the hollow channel 2110 of the rotating shaft 211 (hereinafter referred to as upper ventilation), and the other is from the buffer fluid 93 entering the processing tool channel In 224, the pressurized fluid 91b is cut to form microbubbles (hereinafter referred to as downdraft).

The lack of ventilation means that the spindle 211 is not fed with the gas 90a, that is, the buffer gas flow 93 is not fed into it. In the ventilated state, the rate of flow reduction is the highest for upper and lower ventilators. It can be seen from the statistics that in the ventilated state, because microbubbles can be generated, the gas occupies the volume of the pressurized fluid 91b, resulting in a decrease in the volume of the liquid contained in the pressurized fluid 91b. From this point of view, it can be seen that no matter what kind of ventilation state, gas can be mixed in the pressurized fluid 91b.

Because the pressurized fluid contains microbubbles, the frictional resistance between the pressurized fluid between the pipeline and the pipe wall can be reduced, which in turn can help the fluid flow under the pipeline with a small diameter. Therefore, when the coaxial jet flow generating processing device 2h is applied to mechanical processing, more pressurized fluid can flow into the processing area of the workpiece through the assistance of the micro-bubbles, which facilitates the processing. In the state of ventilation, the driving device that drives the rotating shaft 211, such as a motor, consumes less current than when there is no ventilation, especially the above Reduce current consumption the most when ventilating. It can be known from this that the generation of microbubbles can help reduce the power consumption of the driving device and produce an effect of energy saving.

Based on the above, the coaxial jet generation and processing device of the present invention can overcome the three major problems encountered in the current use of the central jet: 1. Use the processing spindle as the rotating power to directly save the external high-voltage pump, thereby reducing the equipment cost, 2. The distance between the pressure area and the spray end is close to save the pressure loss in the pipe flow (the longer the pipe flow distance, the greater the pressure loss), 3. The water enters from the side, saving the complex structure of the hollow main shaft and the rotary joint. It can also be used on non-hollow main shafts, which can greatly increase the added value and application range of the center jet. 4. With the assistance of micro-bubbles, the drive device can be operated in an energy-saving manner, and the pressurized fluid can flow into the processing area more quickly, improving the processing efficiency.

The above description is only a description of the preferred implementation or examples of the technical means used to solve the problems in the present invention, and is not intended to limit the scope of the patent implementation of the present invention. That is, all equivalent changes and modifications that are consistent with the scope of the patent application of the present invention, or made according to the scope of the patent of the present invention, are covered by the scope of the patent of the present invention.

2: Coaxial jet flow generation processing device

20: Drive device

21: Coaxial jet module

210: Outer shell

210a: guide channel

211: Shaft

2111: end

2112: Runner

212: impeller unit

212a: impeller

212b: Diffusion plate

2120: Concave space

2121: Fluid inlet

2122: Fluid outlet

2123: blade

2124: impeller bottom plate

2125: Approach

213: Bearing

22: Processing tool module

23: Processing tools

230: fluid channel

231: end

24: water stop beans

90: Fluid

91: Pressurized fluid

S: storage space

P1~P4: area

Claims (14)

A coaxial jet flow generating and processing device, comprising: a driving device providing a rotational power; a coaxial jet flow module having a rotating shaft and a plurality of impeller units sequentially connected in series with the rotating shaft, the rotating shaft is coupled to the driving device connected to receive the rotational power to rotate, and then drive the plurality of impeller units to rotate, the coaxial jet flow module receives a fluid, so that the fluid enters the plurality of impeller units in sequence, and then forms a pressurized fluid; and a processing The tool module is coupled with the coaxial jet module to receive the pressurized fluid, and the processing tool module has a processing tool for processing an object; wherein, the rotating shaft has a hollow channel corresponding to at least An impeller unit has a plurality of sub-channels, the hollow flow channel is used to provide an auxiliary fluid to pass through, and then the plurality of sub-channels is discharged from the shaft and enters the corresponding impeller unit, so that the pressurized fluid forms a microbubble-containing fluid. The coaxial jet flow generating processing device as claimed in claim 1, wherein the processing tool has a channel on the axis, and the pressurized fluid passes through the channel and is ejected from the end of the processing tool. The coaxial jet flow generating processing device as claimed in claim 1, wherein the pressurized fluid passes through the outer surface of the processing tool. The coaxial jet flow generating processing device as described in claim 1, wherein each impeller unit further has an impeller and a diffuser plate, and the diffuser plate is arranged on one side of the impeller to receive the pressurized fluid discharged from the impeller , and direct this pressurized fluid to the next impeller unit. The coaxial jet flow generation processing device as described in claim 1, wherein the processing tool module further has a tool collet and a lock sleeve, the tool collet is used to clamp the processing tool, and the lock sleeve It is used to lock the tool in the tool collet, wherein the tool collet has a plurality of gaps for discharging the pressurized fluid. The coaxial jet flow generation processing device according to claim 1, wherein the auxiliary fluid is gas, and the fluid is a fluid containing microbubbles. The coaxial jet flow generation processing device as described in Claim 1, wherein the processing tool module further has a drainage channel and a processing tool channel, the drainage channel communicates with the processing tool channel, and the processing tool channel is used to accommodate the The processing tool has a groove structure in the processing tool channel to accommodate the processing tool, and the drainage channel is used to guide a buffer fluid, enter the processing tool channel, and then act on the processing tool, so that The outer surface of the processing tool is in contact with the groove structure. The coaxial jet generation processing device as described in Claim 1, wherein the processing tool module further has a plurality of drainage channels and a processing tool channel arranged on the processing tool module, and each drainage channel is along the radial direction and The processing tool channel is connected, the processing tool channel is used to accommodate the processing tool, and the drainage channel is used to guide a buffer fluid to enter the processing tool channel, and then act on the processing tool. A coaxial jet flow generating and processing device, comprising: a coaxial jet flow generating and processing device, including: a driving device providing a rotational power; a coaxial jet flow module having a rotating shaft and a plurality of impellers sequentially connected in series with the rotating shaft unit, the rotating shaft is coupled with the driving device to receive the rotational power to rotate, and then drive the plurality of impeller units to rotate, the coaxial jet flow module receives a fluid, so that the fluid enters the plurality of impeller units in sequence, and then forming a pressurized fluid; a processing tool module coupled with the coaxial jetting module to receive the pressurized fluid, the processing tool module has a processing tool for processing an object; and an electrolysis power supply for electrolyzing the fluid to Gas is generated, which in turn causes the pressurized fluid to form a microbubble-containing fluid. A mechanical processing device includes: a pair of driving devices, respectively providing a rotational power; a pair of coaxial jet flow modules, respectively coupled to one of the driving devices, the pair of coaxial jet flow modules are separated by a specific distance, each coaxial The spray flow module has a rotating shaft and a plurality of impeller units connected in series with the rotating shaft. The rotating shaft is coupled with the driving device to receive the rotational power to rotate, and then drive the plurality of impeller units to rotate. The coaxial The jet flow module receives a fluid, and the fluid enters the plurality of impeller units in sequence to form a pressurized fluid; and a line electrode runs through the pair of coaxial jet flow modules, and the pressurized fluid discharged from each coaxial jet flow module Fluid is coated on the outer surface of the wire electrode; wherein, the rotating shaft has a hollow channel, which has a plurality of sub-channels corresponding to at least one impeller unit, and the hollow channel is used to provide an auxiliary fluid to pass through, and then the plurality of sub-channels The flow channel exits the rotating shaft and enters the corresponding impeller unit, thereby making the pressurized fluid into a fluid containing microbubbles. The machining device as described in claim 10, wherein each impeller unit further has an impeller and a diffuser plate, and the diffuser plate is arranged on one side of the impeller to receive the pressurized fluid discharged from the impeller, and This pressurized fluid is directed to the next impeller unit. The mechanical processing device as described in claim 10 further has a pair of eye mold modules corresponding to the pair of coaxial jet flow modules, and each eye mold module includes: An ocular model provides the wire electrode to pass through to guide the wire electrode; and an outer cover is arranged on the periphery of the eye model to guide the high-pressure fluid. The mechanical processing device as described in claim 10, wherein the coaxial jet module is further coupled to a processing tool module, which has a plurality of drainage channels and a processing tool channel ringed on the processing tool module, each A drainage channel communicates with the processing tool channel along the radial direction, the processing tool channel is used to accommodate the wire electrode, and the drainage channel is used to guide a buffer fluid into the processing tool channel, and then act on the wire electrode. on the electrode. A mechanical processing device includes: a pair of driving devices, respectively providing a rotational power; a pair of coaxial jet flow modules, respectively coupled with one of the driving devices, the pair of coaxial jet flow modules are separated by a specific distance, each coaxial The spray flow module has a rotating shaft and a plurality of impeller units connected in series with the rotating shaft. The rotating shaft is coupled with the driving device to receive the rotational power to rotate, and then drive the plurality of impeller units to rotate. The coaxial The jet flow module receives a fluid, and the fluid enters the plurality of impeller units in sequence to form a pressurized fluid; and a line electrode runs through the pair of coaxial jet flow modules, and the pressurized fluid discharged from each coaxial jet flow module A fluid is coated on the outer surface of the wire electrode; and an electrolysis power source is used to electrolyze the fluid to generate gas, and then make the pressurized fluid form a fluid containing microbubbles.

Images