Electric discharge machining machine

Abstract

To provide an electric discharge machining machine which can improve the efficiency of discharging the machining dust on an electric discharge passage.SOLUTION: An electric discharge machining machine capable of supplying dielectric droplets and a negative pressure suction force is provided, the dielectric droplets are fluidized between a processing blade tool and a work-piece, and the processing blade tool is caused to perform electric discharging machining close to the dry type machining to the workpiece. Further, the electric discharge machining machine can separate the processing dust from the workpiece via the processing blade tool using the negative pressure suction force, therefore, the efficiency of discharging the machining dust is improved, accumulation of the processing dust onto the workpiece which causes unstable electric discharging is prevented, further, the efficiency of electric discharging machining is improved, and roughness, shape and dimensional accuracy of a processing portion are desirably preset.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present application relates to the technical field of electric discharge machines, and more particularly to an electric discharge machine capable of improving the efficiency of removing machining chips in a discharge passage. [Background technology]

[0002] Electrical Discharge Machining (EDM) is a technology that uses arc discharge in a discharge passage to machine metals, and is particularly suited to the demand for precision machining of conductive materials with complex shapes or that are difficult to cut. When machining deep holes, particularly blind holes or microholes with high aspect ratios, machining debris often accumulates in the discharge passage and cannot be effectively removed, which can cause short circuits between electrodes and abnormal discharges in the discharge passage, deteriorating the efficiency of the discharge machining and the roughness, shape, and dimensional accuracy of the machined area of ​​the workpiece. Summary of the Invention

[0003] In view of this, the present application provides an electric discharge machine for improving the efficiency of removing machining chips in the discharge passage and resolving technical problems caused by the accumulation of the machining chips in the discharge passage.

[0004] Compared with the prior art, the present application provides an electric discharge machining machine capable of supplying dielectric mist and negative pressure suction, and allows the dielectric mist to flow between the cutting tool and the workpiece through the negative pressure suction, so that the cutting tool can perform near-dry electric discharge machining on the workpiece through the dielectric mist. In addition, the electric discharge machining machine can separate the machining chips from the workpiece via the cutting tool through the negative pressure suction, which improves the chip removal efficiency and prevents the chips from accumulating on the workpiece and causing unstable discharge, and further improves the electric discharge machining efficiency, and achieves the desired roughness, shape and dimensional accuracy of the machined portion of the workpiece. [Means for solving the problem]

[0005] In view of the above-mentioned shortcomings of the prior art, the present application provides an electric discharge machining machine capable of electric discharge machining of a workpiece in combination with a dielectric liquid, the electric discharge machining machine comprising: a machining chamber providing a machining dielectric environment for the workpiece and having a chamber tool passage; a mist generating device capable of receiving the dielectric liquid and misting the dielectric liquid to generate dielectric mist droplets, the mist generating device being connected to the machining chamber and capable of supplying the dielectric mist droplets to the machining dielectric environment; a machining tool having a tool body, a tool machining structure, and a tool internal flow path, the tool machining structure being provided outside the tool body, the tool internal flow path being provided inside the tool body and penetrating the tool body; and a machining spindle having the machining tool mounted thereon and capable of causing the machining tool to enter the machining chamber via the chamber tool passage. a machining spindle that can move the machining tool to bring the machining tool close to the workpiece in the machining chamber so that a discharge passage is formed between the tool machining structure and the workpiece; and a negative pressure supply module that is connected to the tool internal passage and can supply negative pressure suction force to the discharge passage via the tool internal passage so that a negative pressure flow field is formed in the discharge passage, wherein a fluid that drives the dielectric mist droplets is formed via the negative pressure flow field, causing the dielectric mist droplets to flow into the discharge passage so that the tool machining structure can perform electric discharge machining on the workpiece in the discharge passage, and then the dielectric mist droplets can be moved away from the discharge passage by the negative pressure flow field via the tool internal passage.

[0006] Preferably, in the above-mentioned electric discharge machining machine, when the cutting tool machining structure performs electric discharge machining on the workpiece, machining chips are generated in the discharge passage, and the negative pressure flow field forms a fluid that drives the machining chips, thereby enabling the machining chips to be moved away from the discharge passage via a flow path within the cutting tool.

[0007] Preferably, in the above-mentioned electric discharge machining machine, the positive pressure supply module is connected to the machining chamber and capable of supplying positive pressure gas to the machining dielectric environment so that a positive pressure flow field is formed in the machining dielectric environment, wherein a fluid that drives the dielectric mist droplets is formed through the positive pressure flow field, causing the dielectric mist droplets to flow within the machining dielectric environment, the machining chamber further has an intra-chamber flow path, the positive pressure supply module is connected to the intra-chamber flow path and capable of supplying the positive pressure gas to the intra-chamber flow path, the intra-chamber flow path extends toward the discharge passage so that the positive pressure gas can flow via the intra-chamber flow path to the discharge passage, while the intra-chamber flow path is located around the cutting tool body so that the positive pressure gas can flow along the periphery of the cutting tool body.

[0008] Preferably, in the above-mentioned electric discharge machining machine, the machining chamber has at least one chamber wall, the chamber wall surrounding the machining dielectric environment, the atomization device is provided on the chamber wall, the machining chamber has a chamber mist guiding structure connected to the atomization device to receive the dielectric mist, the chamber mist guiding structure faces the discharge passage through the chamber wall to guide the dielectric mist and flow toward the discharge passage, and further includes a liquid containing tank provided for containing the dielectric liquid, the liquid containing tank is adjacent to the machining chamber and capable of supplying the dielectric liquid to the atomization device, and the chamber wall separates the liquid containing tank from the machining dielectric environment.

[0009] Preferably, in the above-mentioned electric discharge machining machine, the chamber wall is inclined to direct the chamber mist guide structure toward the discharge passage, a plurality of chamber walls are provided, two adjacent chamber walls are connected to each other to give the machining chamber a tapered shape, and the chamber mist guide structure is arranged on these chamber walls so as to face the discharge passage. [Brief description of the drawings]

[0010] [Figure 1-2] FIG. 1 is a schematic diagram illustrating an electric discharge machining machine according to the present application in use; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] The following description will explain the technical contents of the present application through specific specific embodiments with reference to the drawings, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in the present specification. The present application can also be implemented or applied through other different specific embodiments. Various modifications and changes can be made to each detail in the present specification based on different perspectives and applications without departing from the spirit of the present application. In particular, the proportional relationship and relative position of each element in the drawings are for illustrative purposes only and do not represent the actual situation of the implementation of the present application.

[0012] For an explanation of an embodiment of the technical disclosure of the present application, please also refer to FIGS. 1 and 2.

[0013] As an embodiment of Fig. 2, the present application provides an electric discharge machining machine 1. The electric discharge machining machine 1 can perform electric discharge machining on a workpiece 2 in combination with a dielectric liquid L, for example, ionized water or kerosene. The electric discharge machining machine 1 includes a machining chamber 11, an atomizing device 12, a machining cutter 13, a machining spindle 14, and a negative pressure supply module 15. The machining chamber 11 provides a machining dielectric environment DIE (Dielectric Environment) for the workpiece 2, and the machining chamber 11 has a chamber cutter passage 111. The atomizing device 12 can receive the dielectric liquid L and atomize the dielectric liquid L to generate dielectric mist G, and the atomizing device 12 can be connected to the machining chamber 11 to supply the dielectric mist G to the machining dielectric environment DIE.

[0014] It should be noted that the atomizing device 12 mainly supplies energy by electromagnetic action, mechanical action, etc., to atomize and disperse the dielectric liquid L into very small droplets, so that the dielectric liquid L can transition to dielectric mist droplets G. As the atomizing device 12, an ultrasonic vibration device may be selected to disperse the dielectric liquid L into dielectric mist droplets G by high-frequency vibration.

[0015] The processing tool 13 has a tool body 131, a tool processing structure 132, and a tool internal flow path 133. The tool processing structure 132 is provided outside the tool body 131. The tool internal flow path 133 is provided inside the tool body 131 and passes through the tool body 131.

[0016] The machining spindle 14 can be equipped with the machining tool 13 and can cause the machining tool 13 to enter the machining chamber 11 via the chamber tool passage 111, and the machining spindle 14 can also move the machining tool 13 to bring the machining tool 13 close to the workpiece 2 in the machining chamber 11 so that a discharge path P is formed between the tool cutting structure 132 and the workpiece 2. It should be noted that the discharge path P is located between the end or side wall of the machining tool 13 and the workpiece 2, and the workpiece 2 can be electric discharge machined by the tool cutting structure 132.

[0017] The processing chamber 11 has at least one chamber wall 113 and a chamber mist guide structure 114. The chamber wall 113 surrounds the processing dielectric environment DIE, and the atomizing device 12 is provided on the chamber wall 113. The chamber mist guide structure 114 is connected to the atomizing device 12 to receive the dielectric mist G, and the chamber mist guide structure 114 faces the discharge passage P through the chamber wall 113 to guide the dielectric mist G to flow toward the discharge passage P. The electric discharge machining machine 1 further includes a liquid storage tank 17 provided for storing a dielectric liquid L, the liquid storage tank 17 can supply the dielectric liquid L to the atomizing device 12 adjacent to the processing chamber 11, and the liquid storage tank 17 and the processing dielectric environment DIE are separated by the chamber wall 113 to prevent the dielectric liquid L stored in the liquid storage tank 17 from directly flowing into the processing dielectric environment DIE.

[0018] 2, the processing chamber 11 has a tapered shape and includes a plurality of inclined chamber walls 113, with adjacent two chamber walls 113 connected to each other. The chamber mist guide structure 114 is disposed on the chamber walls 113 so as to face the discharge passage P.

[0019] The negative pressure supply module 15 is connected to the internal tool flow path 133, so that the negative pressure supply module 15 can supply a negative pressure suction force to the discharge passage P via the internal tool flow path 133, thereby forming a negative pressure flow field NPF in the discharge passage P. A fluid that drives the dielectric mist droplets G is formed via the negative pressure flow field NPF, causing the dielectric mist droplets G in the machining dielectric environment DIE to flow into the discharge passage P, enabling the tool machining structure 132 to perform near-dry electric discharge machining on the workpiece 2 using the dielectric mist droplets G in the discharge passage P, and then the negative pressure flow field NPF can move the dielectric mist droplets G away from the discharge passage P via the internal tool flow path 133.

[0020] It should be explained that when the cutting tool machining structure 132 performs electric discharge machining on the workpiece 2, machining chips SW are generated in the discharge passage P, and the negative pressure flow field NPF forms a fluid that drives the machining chips SW, thereby making it possible to move the machining chips SW away from the discharge passage P via the internal flow path 133 of the cutting tool, and the electric discharge machining machine 1 can supply negative pressure suction force to the discharge passage P via the internal flow path 133 of the cutting tool to suck up and remove the machining chips SW in the discharge passage P, thereby improving the efficiency of removal of the machining chips SW from the discharge passage P.

[0021] 2, the electric discharge machining machine 1 further includes a positive pressure supply module 16. The positive pressure supply module 16 is connected to the machining chamber 11, so that the positive pressure supply module 16 can supply a positive pressure gas PG to the machining dielectric environment DIE so that a positive pressure flow field PPF is formed in the machining dielectric environment DIE, and a fluid that drives the dielectric mist droplets G is formed through the positive pressure flow field PPF, so that the dielectric mist droplets G flow in the machining dielectric environment DIE.

[0022] In the above embodiment, the machining chamber 11 further includes an in-chamber flow path 112, and the positive pressure supply module 16 is connected to the in-chamber flow path 112, so that the positive pressure supply module 16 can supply a positive pressure gas PG to the in-chamber flow path 112, and the positive pressure gas PG includes an inert gas such as argon gas or oxygen gas. The in-chamber flow path 112 extends toward the discharge path P so that the positive pressure gas PG can flow into the discharge path P via the in-chamber flow path 112, so that the positive pressure sweeping force causes the dielectric mist G to flow into the discharge path P, and the machining cutter 11 can perform electric discharge machining on the workpiece 2 in a manner similar to dry machining by the dielectric mist G, and the positive pressure gas PG forms a fluid that drives the machining chips SW, so that the positive pressure sweeping force can move the machining chips SW away from the discharge path P via the in-cutter flow path 133. Alternatively, the chamber flow path 112 may be arranged around the cutting tool body 131, so that the positive pressure gas PG can flow along the periphery of the cutting tool body 131 and the positive pressure gas PG can flow to the discharge passage P via the periphery of the cutting tool body 131, and the positive pressure force expels the machining waste SW in the discharge passage P, further improving the efficiency of removing the machining waste SW in the discharge passage.

[0023] It should be noted that in the above-mentioned embodiments, the above-mentioned partial components may be omitted, and for example, in the present application, an electric discharge machining machine is included. An electric discharge machining machine capable of electric discharge machining of a workpiece in combination with a dielectric liquid, comprising: a machining chamber providing a machining dielectric environment for the workpiece and having a chamber tool passage; a mist generating device capable of receiving the dielectric liquid and misting the dielectric liquid to generate dielectric mist, the mist generating device being connected to the machining chamber and capable of supplying the dielectric mist to the machining dielectric environment; a machining tool having a tool body, a tool machining structure, and a tool internal flow path, the tool machining structure being provided outside the tool body, the tool internal flow path being provided inside the tool body and penetrating the tool body; and a machining tool having the machining tool mounted thereon and passing through the tool body, the machining tool being passed through the chamber tool passage to the machining chamber. a machining spindle capable of entering a chamber and capable of moving the machining tool to bring the machining tool close to the workpiece within the machining chamber so that a discharge passage is formed between the tool machining structure and the workpiece; and a negative pressure supply module connected to the tool internal passage and capable of supplying negative pressure suction force to the discharge passage via the tool internal passage so that a negative pressure flow field is formed in the discharge passage, wherein a fluid that drives the dielectric mist droplets is formed via the negative pressure flow field, causing the dielectric mist droplets to flow into the discharge passage so that the tool machining structure can perform electric discharge machining on the workpiece in the discharge passage, and then the negative pressure flow field causes the dielectric mist droplets to move away from the discharge passage via the tool internal passage.

[0024] In general, the present application provides an electric discharge machining machine capable of supplying dielectric mist and negative pressure suction, and allows the dielectric mist to flow between the cutting tool and the workpiece through the negative pressure suction, so that the cutting tool can perform near-dry electric discharge machining on the workpiece through the dielectric mist. In addition, the electric discharge machining machine can separate the machining chips from the workpiece via the cutting tool through the negative pressure suction, which improves the chip removal efficiency and prevents the chips from accumulating on the workpiece and causing unstable discharges, and further improves the electric discharge machining efficiency, thereby achieving the desired roughness, shape and dimensional accuracy of the machined portion of the workpiece.

[0025] As described above, the present application provides an electric discharge machining machine capable of supplying electric discharge machining fluid to a cutting tool in order to electric discharge machine a workpiece in the discharge passage, and a cutting tool having an internal flow path capable of guiding the flow of the electric discharge machining fluid. The internal flow path can change the flow speed and flow direction of the electric discharge machining fluid, enabling the electric discharge machining fluid to push away machining chips discharged into the discharge passage from the side, thereby moving the machining chips away from the discharge passage. This makes it possible to prevent machining chips from accumulating in the discharge passage and causing short circuits between electrodes and abnormal discharges, and further improves the efficiency of electric discharge machining, allowing the roughness, shape and dimensional accuracy of the machined portion of the workpiece to be as desired, and ultimately makes it possible to reduce the wear time of the cutting tool during electric discharge machining.

Claims

1. An electric discharge machining machine capable of electric discharge machining of a workpiece in combination with a dielectric liquid, a processing chamber providing a processing dielectric environment for the workpiece and having a chamber tool passage; a mist generating device capable of receiving the dielectric liquid and misting the dielectric liquid to generate dielectric mist, the mist generating device being in communication with the processing chamber and capable of providing the dielectric mist to the processing dielectric environment; A cutting tool having a cutting tool body, a cutting tool processing structure, and a cutting tool internal flow path, the cutting tool processing structure being provided outside the cutting tool body, and the cutting tool internal flow path being provided inside the cutting tool body and penetrating the cutting tool body; a machining spindle to which the machining tool is attached and capable of entering the machining chamber via the chamber tool passage, and also capable of moving the machining tool to bring the machining tool close to the workpiece in the machining chamber so that a discharge passage is formed between the tool machining structure and the workpiece; an electric discharge machining machine comprising: a negative pressure supply module connected to the internal flow path of the cutting tool and capable of supplying a negative pressure suction force to the discharge passage via the internal flow path of the cutting tool, so that a negative pressure flow field is formed in the discharge passage, wherein a fluid that drives the dielectric mist droplets is formed via the negative pressure flow field, causing the dielectric mist droplets to flow into the discharge passage so that the cutting tool machining structure can electric discharge machine the workpiece in the discharge passage, and then the negative pressure flow field causes the dielectric mist droplets to move away from the discharge passage via the internal flow path of the cutting tool.

2. 2. The electric discharge machining machine according to claim 1, wherein when the cutting tool machining structure performs electric discharge machining on the workpiece, machining chips are generated in the discharge passage, and the negative pressure flow field forms a fluid that drives the machining chips, thereby moving the machining chips away from the discharge passage via the flow path within the cutting tool.

3. 2. The electric discharge machining machine of claim 1, further comprising a positive pressure supply module in communication with the processing chamber and capable of supplying a positive pressure gas to the processing dielectric environment such that a positive pressure flow field is formed in the processing dielectric environment, wherein a fluid that drives the dielectric fog droplets is formed through the positive pressure flow field, causing the dielectric fog droplets to flow within the processing dielectric environment, the processing chamber further comprising an intra-chamber flow passage, the positive pressure supply module in communication with the intra-chamber flow passage and capable of supplying the positive pressure gas to the intra-chamber flow passage, the intra-chamber flow passage extending towards the discharge passage such that the positive pressure gas can flow via the intra-chamber flow passage and into the discharge passage, while the intra-chamber flow passage lies around the cutting tool body such that the positive pressure gas can flow along the periphery of the cutting tool body.

4. 2. The electric discharge machining machine according to claim 1, wherein the processing chamber has at least one chamber wall, the chamber wall surrounding the processing dielectric environment, the mist device is provided on the chamber wall, the processing chamber has a chamber mist guiding structure in communication with the mist device to receive the dielectric mist, the chamber mist guiding structure faces the discharge passage through the chamber wall to guide the dielectric mist to flow toward the discharge passage, and further includes a liquid containing tank provided for containing the dielectric liquid, the liquid containing tank being adjacent to the processing chamber and capable of supplying the dielectric liquid to the mist device, and the chamber wall separates the liquid containing tank from the processing dielectric environment.

5. 5. The electric discharge machining machine according to claim 4, wherein the chamber wall is inclined to direct the chamber mist guide structure toward the discharge passage, a plurality of the chamber walls are provided, two adjacent ones of the chamber walls are connected to each other to form a tapered shape of the machining chamber, and the chamber mist guide structure is arranged on the chamber walls so as to face the discharge passage.

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