阅读说明：本技术 多轴微细孔电火花振动加工装置 (Multi-shaft micro-hole electric spark vibration machining device ) 是由 王敏婷 曹仁杰 陈恩平 李学通 周靓 肖万军 于 2021-10-21 设计创作，主要内容包括：本发明涉及一种多轴微细孔电火花振动加工装置,其包括升降单元、横梁、多轴加工单元、工作台、底座和十字滑台,升降单元通过立柱固定设于底座上,且横梁与升降单元中的连接板固定连接,多轴加工单元通过电机支架与横梁固定连接,十字滑台设于底座上且位于多轴加工单元的下方,工作台设于十字滑台上。本发明提供的一种多轴微细孔电火花振动加工装置,通过设置多个工具电极对工件上的多个微小孔进行同步加工,且各个电极之间互不干扰,能够实现独立加工,有利于提高加工效率,同时在置料台底部设置电磁振动器,而电磁振动器能将电极加工孔后产生的切屑及电蚀颗粒及时排除,不仅保证了工具电极的正常运转,还提高了微细孔的加工精度和质量。(The invention relates to a multi-shaft micro-hole electric spark vibration machining device which comprises a lifting unit, a cross beam, a multi-shaft machining unit, a workbench, a base and a cross sliding table, wherein the lifting unit is fixedly arranged on the base through an upright post, the cross beam is fixedly connected with a connecting plate in the lifting unit, the multi-shaft machining unit is fixedly connected with the cross beam through a motor support, the cross sliding table is arranged on the base and positioned below the multi-shaft machining unit, and the workbench is arranged on the cross sliding table. According to the multi-axis micro-hole electric spark vibration machining device, the plurality of tool electrodes are arranged to synchronously machine the plurality of micro-holes in the workpiece, the electrodes are not interfered with each other, independent machining can be achieved, machining efficiency is improved, meanwhile, the electromagnetic vibrator is arranged at the bottom of the material placing table and can timely remove cutting scraps and electroerosion particles generated after the electrodes machine the holes, normal operation of the tool electrodes is guaranteed, and machining accuracy and quality of the micro-holes are improved.)

1. A multi-shaft micro-hole electric spark vibration machining device is characterized by comprising a lifting unit, a cross beam, a multi-shaft machining unit, a workbench, a base and a cross sliding table,

the lifting unit is fixedly arranged on the base through an upright post, and the cross beam is fixedly connected with a connecting plate of the lifting unit;

the multi-shaft machining unit is fixedly connected with the cross beam through a motor support, the multi-shaft machining unit comprises an upper box body, a lower box body, a speed reducing motor, a support rib plate, an input shaft, a first output shaft, a second output shaft, a steel wire flexible shaft, an adjusting frame and an electrode machining head, the upper box body is buckled on the lower box body to jointly form a spindle box, the support rib plate is arranged below the lower box body, the speed reducing motor is arranged on the upper box body through the motor support, the input shaft, the first output shaft and the second output shaft are arranged in the spindle box, the input shaft is arranged in the middle of the spindle box, the first end of the input shaft penetrates through the upper box body and is connected with the input shaft of the speed reducing motor through a coupler, the second end of the input shaft is supported on the lower box body through a bearing, and the first end and the second end of the input shaft are respectively provided with a first driving friction wheel and a second driving friction wheel, the first output shaft and the second output shaft are uniformly distributed and arranged around the circumferential direction of the input shaft, and the first output shaft and the second output shaft are arranged at intervals, the first ends of the first output shaft and the second output shaft are supported in the upper box body through bearings, and the second ends of the first output shaft and the second output shaft pass through the lower box body and the round holes arranged on the upper end surfaces of the supporting rib plates and are connected with the first end of the steel wire flexible shaft through a coupler, a first driven friction wheel is arranged at the first end of the first output shaft, a second driven friction wheel is arranged at the second end of the second output shaft, the first driven friction wheel is in friction transmission with the first driving friction wheel, the second driven friction wheel is in friction transmission with the second driving friction wheel, a flexible shaft lower joint at the second end of the steel wire flexible shaft penetrates through the circular through hole of the adjusting frame to be connected with the electrode machining head;

the cross slip table is located just be located on the base the below of multiaxis processing unit, the workstation is located on the cross slip table, just the workstation is including putting material platform, electromagnetic vibrator and vibration case, the vibration case is fixed to be located on the cross connecting block of cross slip table, just it locates to put the material platform the vibration case top, the equipartition is equipped with in the vibration case electromagnetic vibrator, just electromagnetic vibrator's top with put the bottom fixed connection of material platform.

2. The multi-axis micro-hole electric discharge machining device according to claim 1, wherein the lifting unit comprises a column, a lifting screw, a lifting motor, a lifting nut, a screw nut slider, sliders, a connecting plate, and a guide rail, a first end of the lifting screw is supported at a first end of the column through a bearing, a second end of the lifting screw is connected with an input shaft of the lifting motor through a coupling, the lifting motor is arranged on the column through a lifting base, the guide rail is symmetrically arranged on a side surface of the column, the sliders are uniformly arranged at corners of the connecting plate, the screw nut slider is arranged on the connecting plate, the lifting nut is arranged on the screw nut slider, the sliders are slidably connected with the guide rail, and the lifting nut is in transmission connection with the lifting screw.

3. The multi-axis micro hole edm machining device according to claim 1, wherein six circular holes are formed in each of the upper end surfaces of the support ribs, and the center axes of the six circular holes coincide with the center axes of the corresponding first output shaft and second output shaft.

4. The multi-axis micro-hole electric discharge machining apparatus according to claim 1, wherein the first end of the adjustment bracket is provided with a circular through hole, a long through hole is provided at a middle portion of the adjustment bracket, and the adjustment bracket is uniformly arranged around a lower side of the support rib by a connecting bolt at a lower side of the support rib through the long through hole.

5. The multi-axis micro-hole electric discharge machining apparatus as claimed in claim 1, wherein the electrode machining head comprises an electrode connector, a collet chuck nut, and a tool electrode, a first end of the electrode connector passes through the circular through hole of the adjustment bracket to be connected with the lower joint of the flexible shaft, a second end of the electrode connector is provided with the collet chuck, one end of the tool electrode is disposed in the collet chuck, and the collet chuck nut and the electrode connector are threadedly connected to clamp and fix the tool electrode.

6. The multi-axis micro-hole electric discharge machining device according to claim 5, wherein an external thread is provided at one end of the flexible shaft lower joint, and an internal thread is provided at a first end of the electrode connecting member, and the flexible shaft lower joint is in threaded connection with the electrode connecting member.

7. The multi-axis micro-hole edm vibration machining apparatus according to claim 1, wherein an inner diameter of the circular through hole of the adjustment holder is equal to an outer diameter of a joint of the flexible shaft lower joint and an outer diameter of the first end of the electrode connection member, respectively.

8. The multi-axis micro-hole EDM vibration machining apparatus as claimed in claim 1, wherein a clamping means capable of fixing a workpiece is further provided in the material placement table.

9. The multi-axis micro-hole edm vibration machining apparatus according to claim 1, wherein the cross slide table is capable of achieving horizontal movement of the table through a ball screw and a rail slider.

Technical Field

The invention belongs to the technical field of electric spark machining, and particularly relates to a multi-axis micro-hole electric spark vibration machining device.

Background

At present, many mechanical products are designed with micro holes, such as engine blades, cylinder heat dissipation holes, valve body gas path holes or oil path holes, etc. Because the micro deep holes to be processed are generally high in hardness and strength, and most of the micro deep holes are difficult to process materials, such as stainless steel, heat-resistant steel, diamond, hard alloy and the like. Furthermore, due to the limitation of the application, the micro-hole mostly has a large half-depth diameter, which causes the processing of the micro-deep hole to be the most difficult one in the hole processing technology. At present, the traditional single-electrode electric spark device is mostly adopted in the market to machine the micro deep hole, but the machining efficiency is very low, and the depth of the machined hole is limited.

The invention designs an electric spark machining device for a micro-small hole. The device can synchronously process a plurality of micro holes arrayed according to a certain rule on a workpiece by adopting a plurality of tungsten filament electrodes, and can effectively improve the processing condition and the efficiency.

Disclosure of Invention

In view of the above situation, the invention provides a multi-axis micro-hole electric spark vibration machining device, which is beneficial to improving the machining efficiency by arranging a plurality of tool electrodes in a multi-axis machining unit to synchronously machine a plurality of micro-holes on a workpiece, and is beneficial to discharging scrap iron at the micro-holes during machining by arranging an electromagnetic vibrator at the bottom of a material placing table.

The technical scheme adopted by the invention is that the multi-shaft micro-hole electric spark vibration machining device comprises a lifting unit, a cross beam, a multi-shaft machining unit, a workbench, a base and a cross sliding table, wherein the lifting unit is fixedly arranged on the base through an upright post, and the cross beam is fixedly connected with a connecting plate of the lifting unit; the multi-shaft machining unit is fixedly connected with the cross beam through a motor support, the multi-shaft machining unit comprises an upper box body, a lower box body, a speed reducing motor, a support rib plate, an input shaft, a first output shaft, a second output shaft, a steel wire flexible shaft, an adjusting frame and an electrode machining head, the upper box body is buckled on the lower box body to jointly form a spindle box, the support rib plate is arranged below the lower box body, the speed reducing motor is arranged on the upper box body through the motor support, the input shaft, the first output shaft and the second output shaft are arranged in the spindle box, the input shaft is arranged in the middle of the spindle box, the first end of the input shaft penetrates through the upper box body and is connected with the input shaft of the speed reducing motor through a coupler, the second end of the input shaft is supported on the lower box body through a bearing, and the first end and the second end of the input shaft are respectively provided with a first driving friction wheel and a second driving friction wheel, the first output shaft and the second output shaft are uniformly distributed and arranged around the circumferential direction of the input shaft, and the first output shaft and the second output shaft are arranged at intervals, the first ends of the first output shaft and the second output shaft are supported in the upper box body through bearings, and the second ends of the first output shaft and the second output shaft pass through the lower box body and the round holes arranged on the upper end surfaces of the supporting rib plates and are connected with the first end of the steel wire flexible shaft through a coupler, a first driven friction wheel is arranged at the first end of the first output shaft, a second driven friction wheel is arranged at the second end of the second output shaft, the first driven friction wheel is in friction transmission with the first driving friction wheel, the second driven friction wheel is in friction transmission with the second driving friction wheel, a flexible shaft lower joint at the second end of the steel wire flexible shaft penetrates through the circular through hole of the adjusting frame to be connected with the electrode machining head; the cross slip table is located just be located on the base the below of multiaxis processing unit, the workstation is located on the cross slip table, just the workstation is including putting material platform, electromagnetic vibrator and vibration case, the vibration case is fixed to be located on the cross connecting block of cross slip table, just it locates to put the material platform the vibration case top, the equipartition is equipped with in the vibration case electromagnetic vibrator, just electromagnetic vibrator's top with put the bottom fixed connection of material platform.

Further, the lift unit includes stand, elevating screw, elevator motor, lifting nut, screw nut slider, connecting plate and guide rail, elevating screw's first end pass through the bearing support in the first end of stand, just elevating screw's second end pass through the shaft coupling with elevator motor's input shaft, elevator motor passes through the elevator frame and locates on the stand, the guide rail symmetry is located the side of stand, the slider equipartition is located the edge of connecting plate is located, just be equipped with on the connecting plate the screw nut slider, be equipped with on the screw nut slider lifting nut, just the slider with guide rail sliding connection, elevating nut with the elevating screw transmission is connected.

Preferably, six round holes are distributed on the upper end face of each support rib plate, and the central axes of the six round holes are respectively superposed with the central axes of the corresponding first output shaft and the corresponding second output shaft.

Furthermore, a circular through hole is formed in the first end of the adjusting frame, a long groove through hole is formed in the middle of the adjusting frame, and the adjusting frame is uniformly arranged on the lower side of the supporting rib plate in a surrounding mode through the long groove through hole by the connecting bolts on the lower side of the supporting rib plate.

Further, the electrode processing head includes electrode connecting piece, collet chuck nut and instrument electrode, the first end of electrode connecting piece passes the circular through-hole of adjustment frame with the articulate under the flexible axle, just the second end of electrode connecting piece is equipped with collet chuck, instrument electrode one end is located in the collet chuck, just the collet chuck nut with electrode connecting piece threaded connection can the centre gripping fixed the instrument electrode.

Preferably, one end of the flexible shaft lower joint is provided with an external thread, the first end of the electrode connecting piece is provided with an internal thread, and the flexible shaft lower joint is in threaded connection with the electrode connecting piece.

Preferably, the inner diameter of the circular through hole of the adjusting frame is respectively equal to the joint outer diameter of the flexible shaft lower joint and the outer diameter of the first end of the electrode connecting piece.

Furthermore, a clamping device capable of fixing the workpiece is further arranged in the material placing table.

Preferably, the cross sliding table can realize the horizontal movement of the workbench through a ball screw and a guide rail sliding block.

The invention has the characteristics and beneficial effects that:

1. according to the multi-shaft micro-hole electric spark vibration machining device, the input shaft and the plurality of input shafts are arranged in the main shaft box, and the two same driving friction wheels are arranged at the two ends of the input shaft respectively to transmit torque to the input shafts, so that the center distances between the plurality of input shafts and the input shafts are favorably shortened, and micro-holes with smaller intervals can be machined on a workpiece.

2. According to the multi-axis micro-hole electric spark vibration machining device, the plurality of tool electrodes are arranged to synchronously machine the plurality of micro-holes in the workpiece, the electrodes are not interfered with one another, independent machining can be achieved, machining efficiency is improved, meanwhile, the tool electrodes are clamped and fixed through the spring chuck and the spring chuck nut, tool electrodes with different sizes can be replaced according to the hole diameters of the micro-holes in the machined workpiece, and the application range is wider.

3. According to the multi-axis micro-hole electric spark vibration machining device, the adjusting frame penetrates the connecting bolt on the lower side of the supporting rib plate through the long groove through hole, the position of the tool electrode can be adjusted by adjusting the position of the connecting bolt in the long groove through hole, and then micro holes with different gaps on a workpiece are machined.

4. According to the multi-axis micro-hole electric spark vibration machining device provided by the invention, the electromagnetic vibrator is arranged at the bottom of the material placing table, synchronous vibration machining of multiple tool electrodes can be realized, and the electromagnetic vibrator can timely remove cuttings and electroerosion particles generated after the electrode is machined into a hole, so that the machining precision is prevented from being influenced by the cuttings, and the normal operation of the tool electrodes is ensured.

Drawings

FIG. 1 is a schematic view showing the overall structure of a multi-axis micro-hole EDM vibration machining apparatus according to the present invention;

FIG. 2 is an exploded view of the lifting unit structure of the present invention;

FIG. 3 is an exploded view of the beam structure of the present invention;

FIG. 4 is an isometric view of a multi-axis machining unit of the present invention;

FIG. 5 is an isometric view of the internal structure of the multi-axis machining unit of the present invention;

FIG. 6 is an isometric view of the input shaft and input shaft of the present invention;

FIG. 7 is an exploded view of an electrode machining head according to the present invention;

fig. 8 is an exploded view of a part of the structure of the table of the present invention.

The main reference numbers:

a lifting unit 1; a column 11; a lifting screw 12; a lift motor 13; an elevator base 14; a lifting nut 15; a lead screw nut slider 16; a slider 17; a connecting plate 18; a guide rail 19; a cross beam 2; a multi-axis machining unit 3; a reduction motor 31; an upper case 32; a lower case 33; a main spindle box 34; the support rib 35; a motor bracket 36; an input shaft 37; a first driving friction wheel 371; a second driving friction wheel 372; a first input shaft sleeve 373; a second input shaft sleeve 374; a first output shaft 38; a first driven friction wheel 381; a second output shaft 39; a second driven friction wheel 391; a wire flexible shaft 310; a flexible shaft lower joint 3101; an adjustment frame 311; a circular through-hole 3111; a long groove through hole 3112; an electrode processing head 312; an electrode connecting member 3121; collet 3122; collet nut 3123; a tool electrode 3124; a work table 4; a material placing table 41; an electromagnetic vibrator 42; a vibration box 43; a base 5; a cross sliding table 6; a cross connecting block 61.

Detailed Description

The technical contents, structural features, attained objects and effects of the present invention are explained in detail below with reference to the accompanying drawings.

The invention provides a multi-axis micro-hole electric spark vibration machining device which comprises a lifting unit 1, a cross beam 2, a multi-axis machining unit 3, a workbench 4, a base 5 and a cross sliding table 6, as shown in figure 1.

As shown in fig. 2 and fig. 3, the lifting unit 1 is fixedly arranged on the base 5 through an upright post 11, and the lifting unit 1 comprises an upright post 11, a lifting screw 12, a lifting motor 13, a lifting nut 15, a screw nut slider 16, sliders 17, a connecting plate 18 and a guide rail 19, a first end of the lifting screw 12 is supported on a first end of the upright post 11 through a bearing, a second end of the lifting screw 12 is connected with an input shaft of the lifting motor 13 through a coupler, the lifting motor 13 is arranged on the upright post 11 through a lifting machine base 14, the guide rails 19 are symmetrically arranged on the side surfaces of the upright post 11, the sliders 17 are uniformly arranged at the corners of the connecting plate 18, the screw nut slider 16 is arranged on the connecting plate 18, the lifting nut 15 is arranged on the screw nut slider 16, the slider 17 is slidably connected with the guide rail 19, the lifting nut 15 is in transmission connection with the lifting screw 12, and the cross beam 2 is fixedly connected with the connecting plate 18 of the lifting unit 1, meanwhile, a through hole is formed in the cross beam 2 so that the speed reduction motor 31 can penetrate through the cross beam 2. The lifting nut 15 can reciprocate up and down on the upright post 11 along with the rotation of the lifting screw 12 under the driving of the lifting motor 13, and further drives the multi-axis machining unit 3 on the cross beam 2 to reciprocate up and down.

As shown in fig. 4 to 7, the multi-axis machining unit 3 is fixedly connected to the cross beam 2 through a motor support 36, and the multi-axis machining unit 3 includes an upper box 32, a lower box 33, a speed reduction motor 31, a support rib 35, an input shaft 37, a first output shaft 38, a second output shaft 39, a flexible steel cable shaft 310, an adjustment frame 311 and an electrode machining head 312, the upper box 32 is fastened to the lower box 33 to jointly form a spindle box 34, the support rib 35 is disposed below the lower box 33, the speed reduction motor 31 is disposed on the upper box 32 through the motor support 36, the input shaft 37, the first output shaft 38 and the second output shaft 39 are disposed in the spindle box 34, the input shaft 37 is located in the middle of the spindle box 34, a first end of the input shaft 37 penetrates through the upper box 32 and is connected to the input shaft of the speed reduction motor 31 through a coupling, a second end of the input shaft 37 is supported on the lower box 33 through a bearing, and the first end and the second end of the input shaft 37 are respectively provided with a first active friction wheel 371 and a second active friction wheel 372. The output shaft of the speed reducing motor 31 transmits torque to the input shaft 37 through the coupler, and the input shaft 37 is provided with a plurality of sections of shaft shoulders, which are used for axially fixing the first driving friction wheel 371 and the second driving friction wheel 372, the first driving friction wheel 371 and the second driving friction wheel 372 are circumferentially fixed on the input shaft 37 through key connection, the shaft section is sleeved with a first input shaft sleeve 373 and a second input shaft sleeve 374, which are used for axially fixing the first driving friction wheel 371 and the second driving friction wheel 372 and fixing the inner rings of the bearings at two ends of the input shaft 37, and the outer rings of the bearings at two ends of the input shaft 37 are fixed through end covers. First output shaft 38 and second output shaft 39 equipartition encircle the circumferencial direction of locating input shaft 37, and first output shaft 38 and second output shaft 39 interval arrangement, the first end of first output shaft 38 and second output shaft 39 all passes through the bearing and supports in last box 32, and the second end of first output shaft 38 and second output shaft 39 all passes lower box 33 and locates the round hole of support rib plate 35 upper end face and pass through the shaft coupling and be connected with the first end of flexible steel wire axle 310, the first end of first output shaft 38 is equipped with first driven friction wheel 381, the second end of second output shaft 39 is equipped with second driven friction wheel 391, first driven friction wheel 381 and the second driven friction wheel 391 on first output shaft 38 and the second output shaft 39 adopt the shaft shoulder equally, the axle sleeve carries out axial positioning, adopt the key-type connection to carry out circumferential fixing. And first driven friction wheel 381 and first initiative friction wheel 371 friction drive, second driven friction wheel 391 and second initiative friction wheel 372 friction drive, when first initiative friction wheel 371 on input shaft 37 rotates, the frictional force that produces through the contact drives three first driven friction wheel 381 friction wheel rotations that contact with it to transmit torque to three first output shafts 38, when second initiative friction wheel 372 on input shaft 37 rotates, the frictional force that produces through the contact drives three second driven friction wheel 391 friction wheel rotations that contact with it to rotate, thereby transmit torque to three second output shafts 39.

Preferably, six circular holes are distributed on the upper end surface of each support rib 35, and the central axes of the six circular holes coincide with the central axes of the corresponding first output shaft 38 and the corresponding second output shaft 39.

As shown in fig. 7, the flexible shaft lower joint 3101 at the second end of the flexible steel wire shaft 310 is connected to the electrode processing head 312 through the circular through hole 3111 of the adjusting bracket 311, and transmits the torque and the torque from the speed reducing motor 31 to the flexible steel wire shaft 310, and then the flexible steel wire shaft 310 is transmitted to the tool electrode 3124, and a plurality of micro holes on the micro perforated plate are synchronously processed by rotation. And the electrode processing head 312 comprises an electrode connecting piece 3121, a spring chuck 3122, a spring chuck nut 3123 and a tool electrode 3124, a first end of the electrode connecting piece 3121 passes through the circular through hole 3111 of the adjusting bracket 311 and is connected with the flexible shaft lower joint 3101, and a second end of the electrode connecting piece 3121 is provided with the spring chuck 3122, one end of the tool electrode 3124 is arranged in the spring chuck 3122, and the spring chuck nut 3123 is in threaded connection with the electrode connecting piece 3121 and can clamp and fix the tool electrode 3124.

Furthermore, a circular through hole 3111 is formed at a first end of the adjusting frame 311, a long groove through hole 3112 is formed in the middle of the adjusting frame 311, and the adjusting frame 311 is uniformly arranged on the lower side of the supporting rib plate 35 by the connecting bolt on the lower side of the supporting rib plate 35 through the long groove through hole 3112. Because the installed bowden cable 310 can adapt to the torsion of power, the position of the tool electrode 3124 can be adjusted by adjusting the position of the connecting bolt on the lower side of the supporting rib plate 35 in the through hole 3112 of the elongated slot, and then the micro holes with different gaps on the workpiece are processed.

Preferably, one end of the flexible shaft lower joint 3101 is provided with external threads, the first end of the electrode connecting piece 3121 is provided with internal threads, and the flexible shaft lower joint 3101 is in threaded connection with the electrode connecting piece 3121.

Preferably, the inner diameter of the circular through hole 3111 of the adjustment bracket 311 is equal to the outer diameter of the joint of the flexible shaft lower joint 3101 and the outer diameter of the first end of the electrode connecting member 3121, respectively.

As shown in fig. 1 and 8, the cross sliding table 6 is disposed on the base 5 and located below the multi-axis machining unit 3, the workbench 4 is disposed on the cross sliding table 6, the workbench 4 includes a material placing table 41, an electromagnetic vibrator 42 and a vibration box 43, the vibration box 43 is fixedly disposed on a cross connecting block 61 of the cross sliding table 6, the material placing table 41 is disposed above the vibration box 43, the electromagnetic vibrator 42 is uniformly disposed in the vibration box 43, and the top of the electromagnetic vibrator 42 is fixedly connected with the bottom of the material placing table 41.

Furthermore, a clamping device capable of fixing the workpiece is further arranged in the material placing table 41, and the material placing table 41 contains working liquid.

Preferably, the cross sliding table 6 can realize the horizontal movement of the workbench 4 through a ball screw and a guide rail slide block.

The method comprises the following specific operation steps:

as shown in fig. 1 to 8, the multi-axis micro-hole electric spark vibration machining device of the present invention includes a lifting unit 1, a cross beam 2, a multi-axis machining unit 3, a worktable 4, a base 5 and a cross sliding table 6, wherein the lifting unit 1 is fixedly arranged on the base 5 through an upright post 11, the cross beam 2 is fixedly connected with a connecting plate 18 of the lifting unit 1, the multi-axis machining unit 3 is fixedly connected with the cross beam 2 through a motor bracket 36, the cross sliding table 6 is arranged on the base 5 and below the multi-axis machining unit 3, and the worktable 4 is arranged on the cross sliding table 6.

When a multi-shaft micro-hole of a workpiece is machined, the workpiece is firstly mounted on the material placing table 41 through a relevant clamp device, and after the lifting motor 13 is started, the cross beam 2 reciprocates on the upright post 11 until the tool electrode 3124 moves to the most appropriate machining position. At this time, the speed reducing motor 31 is started, the torque of the speed reducing motor 31 is transmitted to the input shaft 37, and the torque is transmitted to the first output shaft 38 and the second output shaft 39 through the friction transmission of the first driving friction wheel 371 and the first driven friction wheel 381, and the friction transmission of the second driving friction wheel 372 and the second driven friction wheel 391, so as to drive the flexible steel wire shaft 310 to rotate, and further drive the tool electrode 3124 to rotate; because the bowden cable 310 is a flexible shaft, when the position of the machined hole needs to be changed, the position of the tool electrode 3124 can be adjusted accordingly only by changing the connecting and fixing position of the adjusting frame 311. Simultaneously, a stepping motor on the cross sliding table 6 is started, and the material placing table 41 with the workpiece clamped thereon moves to a machining position on the cross sliding table 6 along the X axis and the Y axis; when the machining is started, the electromagnetic vibrator 42 is electrified, and the amplitude of the power frequency of the electromagnetic vibrator 42 is used for discharging the erosion and waste generated in the machining process out of the machining area, so that the machining precision is prevented from being influenced by cutting chips, the normal operation of the tool electrode is ensured, and the machining precision and quality of the micro-holes are improved.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.