Liquid-driven electric discharge machining device and application

Abstract

The invention discloses a liquid-driven electric discharge machining device and application, and particularly relates to the field of complex flow channel electric discharge machining device.The liquid-driven electric discharge machining device comprises a liquid-driven pump, one end of the liquid-driven pump is connected with an electrode, and the end, away from the electrode, of the liquid-driven pump is connected with a liquid guide plate; the liquid driving pump comprises a blade shaft, a pump body, a pump cover and an oilless bearing, and the outer circle of the blade shaft makes contact with an inner hole of the oilless bearing. The discharge machining of the combination of the bent guide plate and the electrode or the combination of the bent guide pipe and the electrode is realized, and the problem that the discharge milling rough machining of a complex runner cannot be completed by the combination of a linear cutter bar and the electrode is solved, so that the comprehensive machining efficiency of closed impeller parts is improved; and the comprehensive efficiency of electric spark forming machining can be remarkably improved, the periodic pulse external flushing effect during electrode machining can be achieved, and in the electric discharge machining working process, the quality of the machined surface can be improved advantageously.

Description

Technical Field

[0001] The present application relates to the field of complex flow channel electrical discharge machining devices, and more specifically, to a liquid-driven electrical discharge machining device and its application. Background Art

[0002] Discharge machining is a special machining technology, which is widely used in mold manufacturing and machining industries. Discharge machining can be used to process superhard materials and complex-shaped workpieces that are difficult to process by traditional cutting methods;

[0003] Before the existing complex flow channel discharge finishing, straight shank milling cutter roughing or conventional straight tube electrode is mostly used for high-efficiency discharge roughing. High-efficiency discharge roughing is based on electrochemical reactions and physical effects. Two charged objects (usually electrodes and workpieces) are kept very close but not in contact in a weakly conductive liquid medium. When the voltage reaches a certain level, the medium between the two is broken down, forming a short discharge channel. In this process, huge energy is released, and the temperature rises to thousands or even tens of thousands of degrees in an instant. The high temperature causes the local material to melt and vaporize rapidly, and then the cooled molten metal is ejected at high speed, thereby achieving material removal and forming the desired shape. The inventor found the following problems in the prior art during the implementation of this application:

[0004] Due to the inherent characteristics of the straight-shank tool used in traditional milling, there is an accessibility problem for the complex flow channel of the closed impeller. In order to avoid interference with the outlet edge of the flow channel, the geometric amount removed is limited, and the complex flow channel cannot be penetrated. The immersion processing method of the traditional EDM forming electrode processes the flow channel that is not penetrated, and there is a slag removal problem, that is, the discharge erosion particles are not easy to be removed from the discharge area, which can easily cause a short circuit between the electrode and the workpiece or a secondary discharge problem. In order to ensure the quality of the processed surface, it is necessary to reduce the discharge current and the feed speed, so there is a problem of low processing efficiency;

[0005] Therefore, in order to solve the above problems, a liquid driven electrical discharge machining device and its application are proposed. Summary of the invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present application provides a liquid-driven electrical discharge machining device and application to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present application provides the following technical solution: a liquid-driven electrical discharge machining device, comprising a liquid-driven pump, one end of the liquid-driven pump is connected to an electrode, and the end of the liquid-driven pump away from the electrode is connected to a liquid guide plate, the liquid-driven pump comprises a blade shaft and a pump body, a pump cover and an oil-free bearing;

[0008] Among them, a left-handed thread is provided on the outer side of one end of the pump body, a connecting thread is provided on the inner side of one end of the pump cover, and the pump cover and the pump body are connected through the left-handed thread and the connecting thread, and a right-handed thread is provided on the outer side of the end of the blade shaft away from the pump body, and the outer circle of the blade shaft contacts the inner hole of the oil-free bearing, and the blade shaft and the oil-free bearing connected thereto are both inserted into the end of the pump body away from the pump cover, and the outer side of the oil-free bearing is provided with axial through grooves evenly distributed around the circumference.

[0009] Preferably, a plurality of groups of high-pressure infusion grooves are provided on the outside of the pump body, and a liquid input hole one is provided at one end of the high-pressure infusion groove close to the blade shaft, the center line of the liquid input hole one is eccentric to the center axis of the high-pressure infusion groove, the liquid input hole one is connected to the inside of the pump body, and a stop block is provided at one end of the pump body close to the blade shaft.

[0010] Preferably, a high-pressure coolant input hole is provided inside one end of the pump body close to the left-handed thread, and one end of the high-pressure infusion tank extends to the bottom end of the left-handed thread.

[0011] Preferably, a plurality of groups of liquid output holes 1 are provided between the high-pressure infusion tank and the left-handed thread, the centers of the plurality of groups of liquid output holes 1 are in the same straight line with the central axis of the high-pressure infusion tank, and the liquid output holes 1 are connected with the high-pressure coolant input hole.

[0012] Preferably, a blade shaft power transmission end face is arranged at one end of the blade shaft close to the pump body, and multiple groups of blade force bearing surfaces are arranged on the outer side of one end of the blade shaft close to the blade shaft power transmission end face, and the blade force bearing surfaces are connected to the liquid input hole.

[0013] Preferably, a plurality of groups of coolant input holes 2 are arranged in the blade force surface, a coolant output hole 2 is arranged at one end of the blade shaft away from the pump body, and the coolant input hole 2 is connected to the coolant output hole 2.

[0014] Preferably, a limit ring is arranged between the blade shaft and the power transmission end face of the blade shaft, an end bearing is arranged between the power transmission end face of the blade shaft and the pump body, and the end bearing is in axial contact with the pump body.

[0015] Preferably, an electrode coolant output hole is provided in the electrode, and a high-pressure liquid input hole is provided in the liquid guide plate, the liquid drive pump is connected to the electrode thread through a right-handed thread, and the liquid drive pump is connected to the liquid guide plate thread through a left-handed thread.

[0016] Preferably, the high-pressure liquid input hole and the high-pressure coolant input hole, the liquid input hole 1 and the liquid output hole 1, the coolant input hole 2 and the coolant output hole 2, and the electrode coolant output hole form a liquid circulation channel.

[0017] Preferably, a liquid driven electrical discharge machining device and application, the application method comprises the following steps:

[0018] Step 1: First, the high-pressure liquid enters the liquid guide plate from the high-pressure liquid input hole, and then flows into the pump body from the high-pressure liquid input hole. After entering the internal cavity of the pump body, the high-pressure liquid flows from the liquid output hole 1 to the high-pressure infusion groove to the liquid input hole 1, and enters the pump body from the liquid input hole 1.

[0019] Step 2: After the high-pressure liquid enters the pump body, it impacts the blade force surface, causing the blade shaft to rotate. Changing the angle between the blade and the blade axis or changing the flow rate of the high-pressure liquid impacting the blade can change the rotation speed. The axial component force generated by the impact force makes the blade shaft and the end face bearing in close contact.

[0020] Step three: a part of the high-pressure liquid flows in from the coolant inlet hole 2 on the blade shaft and is output outward through the coolant outlet hole 2, and the other part of the liquid flows out from the groove on the outside of the oil-free bearing with an external groove, achieving an external liquid flushing effect on the electrode, cooling the EDM area, and removing the discharge erosion material from the discharge area.

[0021] Step 4: The liquid-driven pump rotates under the action of high-pressure liquid, and drives the electrode connected to it to rotate. A part of the high-pressure liquid is discharged from the electrode coolant outlet hole. A certain number of circumferentially evenly distributed axial grooves are opened on the outside of the electrode. When the electrode rotates, its axial grooves and the grooves on the oil-free bearing with external grooves will meet periodically, realizing the periodic pulse external flushing effect during electrode processing.

[0022] Technical effects and advantages of this application:

[0023] 1. Compared with the prior art, this liquid-driven electrical discharge machining device and its application realize electrical discharge machining using a curved guide plate and electrode combination or a curved guide tube and electrode combination, and is used to solve the problem of electrical discharge milling rough machining of complex flow channels that cannot be completed by a linear tool bar and electrode combination, thereby improving the comprehensive machining efficiency of closed impeller parts.

[0024] 2. Compared with the existing technology, this liquid-driven electrical discharge machining device and its application can completely machine the complex flow channel to be machined. In actual machining, the rough machining of the entire flow channel can be completed by discharging the complex flow channel layer by layer, and the flow channel can be connected. Then, the through-flow channel can be semi-finished and finished by using an electrical discharge forming electrode. Since the entire flow channel has been connected, the overall efficiency of the electrical discharge forming machining can be significantly improved.

[0025] 3. Compared with the prior art, this liquid-driven electrical discharge machining device and its application can achieve a periodic pulse external liquid flushing effect during electrode machining, which is beneficial to improving the quality of the machined surface during the electrical discharge machining process. The liquid-driven pump rotates under the action of high-pressure liquid and drives the electrode connected to it to rotate, wherein a portion of the high-pressure liquid is output from the electrode coolant output hole, and a certain number of circumferentially evenly distributed axial through grooves are opened on the outside of the electrode. When the electrode rotates, its axial through grooves and the through grooves on the oil-free bearing with external through grooves will periodically meet, thereby achieving a periodic pulse external liquid flushing effect during electrode machining. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of this application;

[0027] Figure 2 A schematic diagram of the overall connection structure of the present application;

[0028] Figure 3 It is a structural schematic diagram of an exploded view of a liquid driven pump of the present application;

[0029] Figure 4 This is a schematic structural diagram of the side section of the driving pump of the present application;

[0030] Figure 5 This is a schematic diagram of the structure of the pump body of this application;

[0031] Figure 6 This is a schematic diagram of the structure of the blade shaft of the present application;

[0032] Figure 7 This is a schematic diagram of the overall application structure of this application.

[0033] The accompanying drawings are marked as follows: 1. liquid-driven pump; 101. blade shaft; 102. oil-free bearing with external through groove; 103. through groove; 104. pump body; 105. pump cover; 1051. connecting thread; 106. left-handed thread; 107. liquid output hole one; 108. high-pressure infusion groove; 109. liquid input hole one; 110. stop block; 111. high-pressure coolant input hole; 112. limiting ring; 113. coolant output hole two; 114. end face bearing; 115. right-handed thread; 116. blade force surface; 117. blade shaft power transmission end face; 118. coolant input hole two; 2. electrode; 3. liquid guide plate or tube; 4. coolant output hole in electrode; 5. high-pressure liquid input hole. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] Example 1

[0036] As attached Figures 1 to 7 A liquid-driven electrical discharge machining device shown includes a liquid-driven pump 1, one end of the liquid-driven pump 1 is connected to an electrode 2, and the end of the liquid-driven pump 1 away from the electrode 2 is connected to a liquid guide plate 3, and the liquid-driven pump 1 includes a blade shaft 101, a pump body 104, a pump cover 105, and an oil-free bearing 102;

[0037] Among them, a left-handed thread 106 is arranged on the outer side of one end of the pump body 104, a connecting thread 1051 is arranged on the inner side of one end of the pump cover 105, and the pump cover 105 and the pump body 104 are threadedly connected through the left-handed thread 106 and the connecting thread 1051, and a right-handed thread 115 is arranged on the outer side of the end of the blade shaft 101 away from the pump body 104, and the outer circle of the blade shaft 101 contacts the inner hole of the oil-free bearing 102, and the blade shaft 101 and the oil-free bearing 102 connected thereto are both inserted into the end of the pump body 104 away from the pump cover 105, and the outer side of the oil-free bearing 102 is provided with axial through grooves 115 uniformly distributed around the circumference. 03, the liquid-driven pump 1 and the liquid guide plate 3 are spirally connected by the left-handed thread 106 and the right-handed thread 115 respectively, and the opposite threaded connection can prevent the connection between the liquid-driven pump 1 and the electrode 2 and the liquid guide plate 3 from loosening. When the electrode 2 rotates, its axial groove and the groove on the oil-free bearing 102 with an external groove will meet periodically, so as to realize the periodic pulse external liquid flushing effect when the electrode 2 is processed, which is beneficial to improve the quality of the processed surface during the discharge machining process. The pump cover 105 is used to close the infusion groove 108 of the pump body 104.

[0038] As a preferred embodiment, a plurality of groups of high-pressure infusion grooves 108 are provided on the outside of the pump body 104, and a liquid input hole 109 is provided at one end of the high-pressure infusion groove 108 close to the blade shaft 101, and the center line of the liquid input hole 109 is eccentric to the center axis of the high-pressure infusion groove 108, the liquid input hole 109 is connected to the pump body 104, and a stop block 110 is provided at one end of the pump body 104 close to the blade shaft 101; further, the stop block 110 is used to fix the oil-free bearing 102 to prevent it from slipping out of the pump body 104, and the high-pressure liquid enters the liquid input hole 109 from the high-pressure infusion groove 108, and enters the pump body 104 through the liquid input hole 109.

[0039] As a preferred embodiment, a high-pressure coolant input hole 111 is provided inside one end of the pump body 104 close to the left-handed thread 106, and one end of the high-pressure infusion groove 108 extends to the bottom end of the left-handed thread 106; further, the high-pressure liquid enters the liquid-driven pump 1 through the high-pressure coolant input hole 111.

[0040] As a preferred embodiment, a plurality of groups of liquid output holes 107 are provided between the high-pressure infusion groove 108 and the left-handed thread 106, the centers of the plurality of groups of liquid output holes 107 are in the same straight line with the central axis of the high-pressure infusion groove 108, and the liquid output holes 107 are connected with the high-pressure coolant input holes 111; further, the high-pressure liquid flows to the liquid output holes 107 through the high-pressure coolant input holes 111, and enters the high-pressure infusion groove 108 from the liquid output holes 107.

[0041] As a preferred embodiment, a blade shaft power transmission end face 117 is provided at one end of the blade shaft 101 close to the pump body 104, and a plurality of blade force surfaces 116 are provided on the outer side of one end of the blade shaft 101 close to the blade shaft power transmission end face 117, and the blade force surfaces 116 are connected to the liquid input hole 109; further, high-pressure liquid enters the liquid input hole 109 through the high-pressure infusion groove 108, and enters the pump body 104 through the liquid input hole 109, and impacts the blade force surface 116, so that the blade shaft 101 rotates, and changing the angle between the blade and the blade axis or changing the flow rate of the high-pressure liquid impacting the blade can change the rotation speed, and the axial component force generated by the impact force makes the blade shaft 101 in close contact with the end face bearing 114, thereby ensuring the current conduction during discharge machining.

[0042] As a preferred embodiment, a plurality of groups of coolant inlet holes 118 are provided in the blade force surface 116, and a coolant outlet hole 113 is provided at one end of the blade shaft 101 away from the pump body 104, and the coolant inlet hole 118 and the coolant outlet hole 113 are connected to each other; further, the high-pressure liquid enters the coolant outlet hole 113 from the coolant inlet hole 118, and flows out of the pump body 104 from the coolant outlet hole 113.

[0043] As a preferred embodiment, a limit ring 112 is arranged between the blade shaft 101 and the blade shaft power transmission end face 117, an end bearing 114 is arranged between the blade shaft power transmission end face 117 and the pump body 104, and the end bearing 114 is in axial contact with the pump body 104; further, the blade shaft power transmission end face 117 is against the end bearing 114, and the electrode 2 conducts the current through the left-handed thread 106 and the end bearing 114 and the oil-free bearing 102 on the liquid-driven pump 1.

[0044] As a preferred embodiment, an electrode coolant outlet hole 4 is provided in the electrode 2, and a high-pressure liquid inlet hole 5 is provided in the liquid guide plate 3, the liquid-driven pump 1 is threadedly connected to the electrode 2 via a right-handed thread 115, and the liquid-driven pump 1 is threadedly connected to the liquid guide plate 3 via a left-handed thread 106; further, after the high-pressure liquid enters the liquid guide plate 3 via the high-pressure liquid inlet hole 5, the high-pressure liquid flows into the liquid-driven pump 1 via the high-pressure liquid inlet hole 5.

[0045] As a preferred embodiment, the high-pressure liquid input hole 5 and the high-pressure coolant input hole 111 as well as the liquid input hole 109 and the liquid output hole 107 and the coolant input hole 118 and the coolant output hole 113 as well as the electrode coolant output hole 4 constitute a liquid circulation channel; further, the high-pressure liquid flows and is transported through the high-pressure liquid input hole 5 and the high-pressure coolant input hole 111 as well as the liquid input hole 109 and the liquid output hole 107 and the coolant input hole 118 and the coolant output hole 113 as well as the electrode coolant output hole 4.

[0046] As a preferred embodiment, a liquid-driven electrical discharge machining device and application thereof, the application method comprises the following steps:

[0047] Step 1: First, the high-pressure liquid enters the liquid guide plate 3 from the high-pressure liquid input hole 5, and then flows into the liquid drive pump 1 from the high-pressure liquid input hole 5. The high-pressure liquid first enters the internal cavity of the pump body 104, flows from the liquid output hole 107 to the high-pressure infusion groove 108 to the liquid input hole 109, and enters the pump body 104 from the liquid input hole 109.

[0048] Step 2: After the high-pressure liquid enters the pump body 104, the high-pressure liquid impacts the blade force surface 116, causing the blade shaft 101 to rotate. Changing the angle between the blade and the blade axis or changing the flow rate of the high-pressure liquid impacting the blade can change the rotation speed. The axial component force generated by the impact force makes the blade shaft 101 in close contact with the end face bearing 114.

[0049] Step three: a part of the high-pressure liquid flows in from the coolant inlet hole 118 on the blade shaft 101 and is output outward through the coolant outlet hole 113, and another part of the liquid flows out from the groove 103 on the outside of the oil-free bearing with external groove 102, thereby achieving the external liquid flushing effect on the electrode, cooling the EDM area, and removing the discharge erosion products from the discharge area.

[0050] Step 4: The liquid-driven pump 1 rotates under the action of high-pressure liquid, and drives the electrode 2 connected thereto to rotate, wherein a part of the high-pressure liquid is discharged from the electrode coolant outlet hole 4, and a certain number of axial through grooves evenly distributed around the circumference are opened on the outside of the electrode 2. When the electrode 2 rotates, its axial through grooves and the through grooves 103 on the oil-free bearing 102 with external through grooves will periodically meet, thereby realizing a periodic pulse external flushing effect during electrode processing.

[0051] The working process of the present application is as follows: first, after the high-pressure liquid enters the liquid guide plate 3 from the high-pressure liquid input hole 5, the high-pressure liquid flows into the liquid-driven pump 1 from the high-pressure liquid input hole 5, and the high-pressure liquid first enters the internal cavity of the pump body 104, flows from the liquid output hole 107 to the high-pressure infusion groove 108 to the liquid input hole 109, and enters the pump body 104 from the liquid input hole 109, and after the high-pressure liquid enters the pump body 104, the high-pressure liquid impacts the blade force surface 116, so that the blade shaft 101 rotates, and the rotation speed can be changed by changing the angle between the blade and the blade axis or changing the flow rate of the high-pressure liquid impacting the blade, and the axial component force generated by the impact force makes the blade shaft 101 in close contact with the end face bearing 114;

[0052] A part of the high-pressure liquid flows in from the second coolant input hole 118 on the blade shaft 101 and is output outward through the second coolant output hole 113, and another part of the liquid flows out from the through groove 103 on the outer side of the oil-free bearing 102 with an outer through groove, so as to achieve the external flushing effect on the electrode, cool the EDM area, and remove the discharge erosion products from the discharge area;

[0053] The liquid-driven pump 1 rotates under the action of high-pressure liquid, and drives the electrode 2 connected thereto to rotate, wherein a part of the high-pressure liquid is discharged from the electrode coolant outlet hole 4, and a certain number of axial through grooves evenly distributed around the circumference are provided on the outside of the electrode 2. When the electrode 2 rotates, its axial through grooves and the through grooves 103 on the oil-free bearing 102 with external through grooves will periodically meet, so as to realize the periodic pulse external liquid flushing effect during the electrode machining, and realize the periodic pulse external liquid flushing effect during the electrode 2 machining, which is beneficial to improve the quality of the machined surface during the discharge machining process, and the electrode 2 conducts the current through the left-handed thread 106 and the end face bearing 114 on the liquid-driven pump 1 and the oil-free bearing 102;

[0054] The complex flow channel to be processed is completely processed. In actual processing, the rough processing of the entire flow channel can be completed by discharging the complex flow channel layer by layer, and the flow channel can be connected. Then the electrospark forming electrode is used to perform semi-finishing and finishing on the through flow channel. Since the entire flow channel has been connected, the comprehensive efficiency of electrospark forming processing can be significantly improved. The above is the working principle of this liquid-driven discharge machining device and its application.

Claims

1. A liquid-driven electrical discharge machining device, comprising a liquid-driven pump (1), characterized in that: One end of the liquid-driven pump (1) is connected to an electrode (2), and one end of the liquid-driven pump (1) away from the electrode (2) is connected to a liquid guide plate (3), and the liquid-driven pump (1) comprises a blade shaft (101), a pump body (104), a pump cover (105), and an oil-free bearing (102); A left-handed thread (106) is arranged on the outer side of one end of the pump body (104), a connecting thread (1051) is arranged on the inner side of one end of the pump cover (105), and the pump cover (105) and the pump body (104) are threadedly connected via the left-handed thread (106) and the connecting thread (1051). A right-handed thread (115) is arranged on the outer side of one end of the blade shaft (101) away from the pump body (104), the outer circle of the blade shaft (101) contacts the inner hole of the oil-free bearing (102), the blade shaft (101) and the oil-free bearing (102) connected thereto are both inserted into one end of the pump body (104) away from the pump cover (105), and the outer side of the oil-free bearing (102) is provided with axial through grooves (103) uniformly distributed around the circumference.

2. A liquid driven electrical discharge machining device according to claim 1, characterized in that: A plurality of groups of high-pressure infusion grooves (108) are arranged on the outside of the pump body (104), and a liquid input hole (109) is arranged at one end of the high-pressure infusion groove (108) close to the blade shaft (101), the center line of the liquid input hole (109) is eccentric to the center axis of the high-pressure infusion groove (108), the liquid input hole (109) is connected to the inside of the pump body (104), and a stop block (110) is arranged at one end of the pump body (104) close to the blade shaft (101).

3. A liquid driven electrical discharge machining device according to claim 2, characterized in that: A high-pressure coolant inlet hole (111) is provided inside one end of the pump body (104) close to the left-handed thread (106), and one end of the high-pressure infusion groove (108) extends to the bottom end of the left-handed thread (106).

4. The liquid-driven electrical discharge machining device according to claim 1, characterized in that: A plurality of groups of liquid output holes (107) are provided between the high-pressure infusion groove (108) and the left-handed thread (106), the centers of the plurality of groups of liquid output holes (107) are on the same straight line as the central axis of the high-pressure infusion groove (108), and the liquid output holes (107) are connected to the high-pressure cooling liquid input hole (111).

5. The liquid-driven electrical discharge machining device according to claim 2, characterized in that: A blade shaft power transmission end surface (117) is provided at one end of the blade shaft (101) close to the pump body (104), and multiple groups of blade force bearing surfaces (116) are provided outside one end of the blade shaft (101) close to the blade shaft power transmission end surface (117), and the blade force bearing surfaces (116) are connected to the first liquid input hole (109).

6. The liquid-driven electrical discharge machining device according to claim 5, characterized in that: A plurality of groups of cooling liquid input holes (118) are arranged in the blade force surface (116), and a cooling liquid output hole (113) is arranged at one end of the blade shaft (101) away from the pump body (104), and the cooling liquid input hole (118) and the cooling liquid output hole (113) are connected.

7. The liquid-driven electrical discharge machining device according to claim 6, characterized in that: A limit ring (112) is arranged between the blade shaft (101) and the power transmission end face (117) of the blade shaft, an end face bearing (114) is arranged between the power transmission end face (117) of the blade shaft and the pump body (104), and the end face bearing (114) is in axial contact with the pump body (104).

8. The liquid-driven electrical discharge machining device and application according to claim 7, characterized in that: The electrode (2) is provided with an electrode cooling liquid output hole (4), and the liquid guide plate (3) is provided with a high-pressure liquid input hole (5), the liquid drive pump (1) is threadedly connected to the electrode (2) via a right-handed thread (115), and the liquid drive pump (1) is threadedly connected to the liquid guide plate (3) via a left-handed thread (106).

9. The liquid-driven electrical discharge machining device according to claim 8, characterized in that: The high-pressure liquid input hole (5), the high-pressure cooling liquid input hole (111), the liquid input hole 1 (109), the liquid output hole 1 (107), the cooling liquid input hole 2 (118), the cooling liquid output hole 2 (113), and the electrode cooling liquid output hole (4) form a liquid circulation channel.

10. A liquid-driven electrical discharge machining device and application thereof, using the liquid-driven electrical discharge machining device according to any one of claims 1 to 9, characterized in that: The application method comprises the following steps: Step 1: First, the high-pressure liquid enters the liquid guide plate (3) through the high-pressure liquid input hole (5), and then flows into the pump body (104) through the high-pressure liquid input hole (5). After entering the internal cavity of the pump body (104), the high-pressure liquid flows from the liquid output hole 1 (107) to the high-pressure liquid infusion groove (108) to the liquid input hole 1 (109), and then enters the pump body (104) through the liquid input hole 1 (109); Step 2: After the high-pressure liquid enters the pump body (104), the high-pressure liquid impacts the blade force surface (116), causing the blade shaft (101) to rotate. The rotation speed can be changed by changing the angle between the liquid input hole 1 (109) and the blade and the blade axis or by changing the flow rate of the high-pressure liquid impacting the blade. The axial component force generated by the impact force causes the blade shaft (101) to be in close contact with the end face bearing (114); Step 3: a portion of the high-pressure liquid flows in from the second coolant input hole (118) on the blade shaft (101) and is output outward through the second coolant output hole (113), and another portion of the liquid flows out from the through groove (103) outside the oil-free bearing with an external through groove (102), thereby achieving an external flushing effect on the electrode, cooling the electrospark machining area, and removing discharge erosion products from the discharge area; Step 4: The liquid-driven pump (1) rotates under the action of high-pressure liquid, and drives the electrode (2) connected thereto to rotate, wherein a portion of the high-pressure liquid is discharged from the electrode coolant outlet hole (4), and a certain number of axial through grooves evenly distributed around the circumference are opened on the outside of the electrode (2). When the electrode (2) rotates, its axial through grooves and the through grooves (103) on the oil-free bearing (102) with external through grooves will periodically meet, thereby achieving a periodic pulse external liquid flushing effect during electrode processing.

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