CN114406379B

CN114406379B - Punching machine

Info

Publication number: CN114406379B
Application number: CN202210045172.5A
Authority: CN
Inventors: 黄家伟
Original assignee: Wenling City Dajing Mould Co ltd
Current assignee: Wenling City Dajing Mould Co ltd
Priority date: 2022-01-15
Filing date: 2022-01-15
Publication date: 2023-04-07
Anticipated expiration: 2042-01-15
Also published as: CN114406379A

Abstract

The application relates to a perforating machine, comprises a workbench, be equipped with the support on the workstation, there is discharge electrode along vertical direction sliding connection on the support, swing joint has the anchor clamps that are used for the centre gripping work piece on the workstation, there is the installation pole along vertical direction sliding connection on the support, discharge electrode sets up on the installation pole and through installation pole and leg joint, be connected with towards the liquid device on the installation pole, it is used for dashing the liquid cooling to the work piece to dash the liquid device. The liquid flushing device moves along with the discharge electrode through the installation rod, when the discharge electrode perforates the workpiece, the liquid flushing device can simultaneously flush the workpiece, and an operator does not need to hold the external liquid flushing device to flush the workpiece, so that the workload of the operator in flushing and cooling operation is reduced.

Description

Punching machine

Technical Field

The application relates to the field of perforating machines, in particular to a perforating machine.

Background

The puncher is a very important device used in machinery, and the puncher is also called an electric spark puncher, a small hole puncher and a small hole discharge machine, and the working principle of the puncher is to use a thin metal copper tube (called as an electrode wire) which continuously moves vertically up and down as an electrode to carry out pulse spark discharge metal removal forming on a workpiece.

The invention patent with the publication number of CN107790828A discloses a linear guide rail puncher, which comprises a left guider, a right guider, a front guider, a rear guider, an LED illuminating lamp, a display screen and a hand wheel, wherein the left guider, the right guider, the front guider, the rear guider, the LED illuminating lamp, the display screen and the hand wheel are arranged on the top of a base, the front guider and the rear guider are fixedly connected to the top of the left guider and the rear guider, a discharge electrode is embedded at the bottom of a spindle bin, the LED illuminating lamp is arranged on one side of the spindle bin, a lifting button is arranged on the other side of the spindle bin, the display screen is embedded on one side of an operating button, an emergency stop button is arranged on the other side of the operating button, the hand wheels are embedded on the outer sides of the left guider, the right guider, the front guider and the rear guider, and the top of the front guider is provided with a workbench.

Be applied to stamping die's perforation with above-mentioned piercing mill, at the perforation in-process, stamping die's temperature can become high, and has the bits sediment on the stamping die who is perforated, and operating personnel need additionally hand external towards liquid device and carry out towards liquid cooling to stamping die, and spun liquid is the coolant liquid among the external towards liquid device.

The above-mentioned related art has the following disadvantages: in the drilling process, an operator is required to hold the external flushing device to continuously flush the stamping die, so that certain workload is caused to the operator.

Disclosure of Invention

The application provides a punching machine, which is used for reducing the workload of an operator during flushing and cooling operation.

The application provides a piercing mill adopts following technical scheme:

the utility model provides a perforating machine, includes the workstation, be equipped with the support on the workstation, there is the discharge electrode along vertical direction sliding connection on the support, swing joint has the anchor clamps that are used for the centre gripping work piece on the workstation, there is the installation pole along vertical direction sliding connection on the support, the discharge electrode setting is on the installation pole and through installation pole and leg joint, be connected with towards the liquid device on the installation pole, it is used for dashing the liquid cooling to the work piece to dash the liquid device.

Through adopting above-mentioned technical scheme, the flushing device removes through the discharge electrode is followed to the installation pole, and when the discharge electrode perforated the work piece, the flushing device can carry out flushing cooling to the work piece simultaneously, and operating personnel need not hand external flushing device again and carry out the flushing to the work piece to work burden when operating personnel carried out flushing cooling operation has been alleviateed.

Preferably, the liquid flushing device further comprises a first driving part, the liquid flushing device comprises a rotating ring, a pump body, a pipeline, a spray head and a deformable transmission pipe, the rotating ring is located above the discharge electrode, the rotating ring is sleeved and coaxially and rotatably connected to the installation rod, the pump body is arranged on the installation rod, two ends of the pipeline are respectively connected with the installation rod and the spray head, the spray head faces to the position under the discharge electrode, two ends of the transmission pipe are respectively communicated with the pump body and the pipeline, the pump body extracts external cooling liquid and drives the cooling liquid to sequentially pass through the transmission pipe and the pipeline and finally to be sprayed out from the spray head, and the first driving part drives the rotating ring to rotate.

By adopting the technical scheme, the rotating ring can spray the workpiece at various angles, so that the scraps after perforation and the part of the workpiece which is heated and melted are melted into the cooling liquid, the waste materials can be better flushed out of the workpiece, and the probability of influence of the waste materials on next perforation is reduced.

Preferably, the first driving part comprises a first motor and a gear, the first motor is arranged in the installation rod, an output shaft of the first motor is coaxially arranged on the gear, an annular tooth groove matched with the gear is formed in the circumferential inner wall of the rotating ring, and the gear is connected to the annular tooth groove in a meshed mode.

Through adopting above-mentioned technical scheme, rotate through the output shaft that drives first motor and drive the gear and rotate, gear rotation drives the change that is connected with gear engagement again and rotates and connect on the installation pole to realize the position adjustment of shower nozzle.

Preferably, still include the spring, be equipped with the bellows on the shower nozzle, the shower nozzle passes through the bellows to be fixed on the pipeline, the one end that the pipeline is close to the shower nozzle is the slope setting, the pipeline is close to the one end of shower nozzle and sets up under discharge electrode, the both ends of spring set up respectively on pipeline and shower nozzle, when no external force is applyed on pipeline and shower nozzle, the shower nozzle sets up towards discharge electrode all the time under the effect of spring, when letting in the coolant liquid completely in the pipeline, the shower nozzle sets up under discharge electrode under the impulsive force effect of coolant liquid.

Through adopting above-mentioned technical scheme, let in the coolant liquid completely in the pipeline, the coolant liquid flows to on the shower nozzle and causes certain impact to the shower nozzle along the direction of pipeline, thereby make the shower nozzle overcome the elasticity of spring and the holding power of bellows and rotate downwards under to the discharge electrode of orientation, spray near the surface of work piece drilling towards drilling department promptly, after the drilling is accomplished, stop letting in the coolant liquid, the impulsive force of coolant liquid to the shower nozzle can be less than the elasticity of spring gradually, the shower nozzle can upwards rotate gradually, at this moment the spun coolant liquid can be towards drilling department again and strafe one end distance, can further sweep impurity from drilling department, keep the cleanness of drilling department.

Preferably, be equipped with the rail on the workstation, the projection of discharge electrode on the workstation is located the rail center, including the rail surrounds anchor clamps, behind anchor clamps centre gripping work piece, the home range of work piece is in the rail, four inner walls of rail are respectively just to four outer walls of work piece, be equipped with distance sensor on four inner walls of rail respectively, distance sensor is used for measuring each other just to the distance of the rail inner wall to the work piece outer wall that sets up, the support is equipped with the controller, the controller receives four distance sensor's measurement numerical value and controls the rotation of first motor output shaft through calculating, the shower nozzle is towards the perforation all the time and keeps away from one side blowout coolant liquid at work piece center.

By adopting the technical scheme, the distance between the inner wall of the fence and the outer wall of the workpiece, which are arranged just opposite to each other, is measured by the distance sensor, the specific position of the projection of the current workpiece on the workbench can be reflected, and the specific position of the projection of the discharge electrode on the work can be indirectly obtained because the position of the projection of the discharge electrode on the workbench is fixed, so that the spray head moves to one side, facing the center of the workpiece, of the discharge electrode, and then the spray head sprays cooling liquid towards one side, facing the perforation, far away from the center of the workpiece, of the perforation, after the cooling liquid sprays the periphery of the perforation of the workpiece, the cooling liquid can directly flow out of the surface of the workpiece at the highest speed, thereby reducing the probability that the cleaned cooling liquid is retained on the workpiece, and improving the cleaning effect on the workpiece.

Preferably, still including a first section of thick bamboo and a second of protecting of mutual sliding connection, a first section of thick bamboo and a second of protecting protect one end of keeping away from each other and set up respectively on pipeline and shower nozzle, the length direction that a first section of thick bamboo and a second protected a section of thick bamboo is on a parallel with the length direction of spring and establish including the spring cover.

Through adopting above-mentioned technical scheme, first protect a section of thick bamboo and protect a section of thick bamboo with the second and can play the guard action to the spring, increase the life of spring.

Preferably, the spray head is a flat nozzle fan-shaped spray head.

Through adopting above-mentioned technical scheme, the coolant liquid of flat mouth fan-shaped shower nozzle spun is the sector form and spills, can increase the area of contact of coolant liquid and workpiece surface to further improve the clearance effect to workpiece surface.

Preferably, the enclosure is made of a transparent material.

Through adopting above-mentioned technical scheme, can make things convenient for operating personnel to observe the progress of work piece drilling.

In summary, the present application includes at least one of the following beneficial technical effects:

the first protective cylinder and the second protective cylinder can protect the spring and prolong the service life of the spring;

by arranging the flat nozzle fan-shaped spray head, the cooling liquid sprayed by the flat nozzle fan-shaped spray head is spread in a fan shape, so that the contact area between the cooling liquid and the surface of the workpiece can be increased, and the cleaning effect on the surface of the workpiece is further improved;

through setting up transparent rail, can make things convenient for operating personnel to observe the progress of work piece drilling.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present application.

Fig. 2 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 1.

Fig. 3 is an enlarged view at B in fig. 2.

Fig. 4 is a schematic view of a discharge electrode perforating a punching die according to an embodiment of the present application.

Description of reference numerals: 1. a work table; 11. a support; 111. a vertical slot; 112. a second motor; 113. a first lead screw; 12. a first chute; 121. a second lead screw; 122. a third motor; 123. a first slider; 13. a second chute; 131. a third lead screw; 132. a fourth motor; 133. a second slider; 14. a clamp; 141. a splint; 142. a second cylinder; 143. a third chute; 15. mounting a rod; 151. a travel bar; 152. mounting a column; 16. a discharge electrode; 17. a fence; 171. a distance sensor; 2. a liquid flushing device; 21. rotating the ring; 211. a first motor; 212. a gear; 213. an annular tooth groove; 22. a pipeline; 221. a first tube; 222. a second tube; 23. a bellows; 24. a spring; 251. a first casing; 252. a second casing; 26. a pump body; 261. a conveying pipe; 262. a pipette; 27. a spray head; 3. and (5) stamping a die.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses a perforating machine.

Referring to fig. 1 and 2, the piercing mill of the present embodiment includes a workbench 1, a support 11 is fixedly connected to a top surface of the workbench 1 along a vertical direction, a bottom end of the support 11 is fixed to the top surface of the workbench 1, the support 11 is located at one end of the workbench 1 in a length direction, and the support 11 is located at a center position of the workbench 1 in a width direction. The support 11 is seted up along the vertical direction setting perpendicular groove 111 towards one side at workstation 1 center, has the installation pole 15 along vertical direction sliding connection in perpendicular groove 111, and installation pole 15 includes carriage release lever 151 and erection column 152. One end of the moving rod 151 is slidably coupled to the vertical groove 111 in a vertical direction, and a length direction of the moving rod 151 is parallel to a length direction of the table 1. Support 11 top fixedly connected with second motor 112 erects groove 111 and rotates and be connected with first lead screw 113, and first lead screw 113 is vertical setting, and the both ends of first lead screw 113 are rotated respectively and are connected on the upper and lower both ends terminal surface of erecting groove 111, and the output shaft of second motor 112 is vertical stretches out downwards and coaxial fixed connection on the top of first lead screw 113, and first lead screw 113 is worn to establish and threaded connection is on carriage release lever 151.

Referring to fig. 1 and 2, the top end of the mounting post 152 is fixedly connected to the bottom surface of the moving rod 151 away from one end of the bracket 11, and the mounting post 152 is vertically disposed. The bottom end of the mounting post 152 is fixedly connected with a discharge electrode 16, and the discharge electrode 16 is used for performing punching processing on a workpiece, wherein the workpiece is mainly a stamping die 3.

The first lead screw 113 is driven to rotate by driving the output shaft of the second motor 112, and the first lead screw 113 rotates to drive the moving rod 151 screwed on the first lead screw 113 to slide on the vertical groove 111 along the vertical direction, so that the discharge electrode 16 vertically moves downwards and perforates the surface of the stamping die 3.

Referring to fig. 1 and 2, a first slider 123 is connected to the top surface, a first chute 12 is formed in the top surface of the workbench 1, the length direction of the first chute 12 is parallel to the length direction of the workbench 1, the bottom end of the first slider 123 is slidably connected to the first chute 12 along the length direction of the first chute 12, and the length direction of the first slider 123 is parallel to the width direction of the workbench 1. Rotate on first spout 12 and be connected with second lead screw 121, the both ends of second lead screw 121 rotate respectively and connect on the both ends terminal surface of first spout 12, the length direction of second lead screw 121 is on a parallel with the length direction of first spout 12, fixedly connected with third motor 122 on the workstation 1 lateral wall, the output shaft of third motor 122 stretches out and coaxial fixed connection keeps away from the one end of support 11 at second lead screw 121 towards first spout 12. The second lead screw 121 is threaded on the bottom end of the first slider 123.

Referring to fig. 1 and 2, a second sliding groove 13 is formed in the top surface of the first sliding block 123 along the length direction of the first sliding groove 12, a second sliding block 133 is connected to the second sliding groove 13 in a sliding manner, and the bottom end of the second sliding block 133 is connected to the second sliding groove 13 along the length direction of the second sliding groove 13 in a sliding manner. One end of the second sliding chute 13 is fixedly connected with a fourth motor 132, an output shaft of the fourth motor 132 extends out towards the other end of the second sliding chute 13 and is coaxially and fixedly connected with a third lead screw 131, one end of the third lead screw 131 is fixed on the fourth motor 132, the other end of the third lead screw 131 is rotatably connected to the end face, far away from the fourth motor 132, of the second sliding chute 13, and the length direction of the third lead screw 131 is parallel to the length direction of the second sliding chute 13. The third lead screw 131 is threaded on the bottom end of the second slider 133.

Referring to fig. 1 and 2, a clamp 14 is fixed to the top surface of the second slider 133, and the clamp 14 is used for clamping the press die 3.

The third motor 122 is driven to rotate to drive the second lead screw 121 to rotate, and the second lead screw 121 rotates to drive the first sliding base connected to the second lead screw 121 to slide in the first sliding chute 12. The fourth motor 132 is driven to rotate to drive the third screw 131 to rotate, and the third screw 131 rotates to drive the second sliding seat screwed on the third screw 131 to slide in the second sliding slot 13. The gripper 14 follows the second slide and thus the movement of the gripper 14 on the table 1 is achieved, enabling the discharge electrode 16 to perforate any position on the top surface of the stamping die 3.

Referring to fig. 1 and 2, the clamp 14 includes two second cylinders 142 and two clamping plates 141, the two second cylinders 142 are respectively embedded in the second sliding blocks 133, and the length directions of the piston rods of the two second cylinders 142 are parallel to the length direction of the workbench 1. Two third sliding grooves 143 are formed in the top surface of the second slider 133, piston rods of the two second cylinders 142 extend out to the two third sliding grooves 143 towards directions away from each other and are fixedly connected to the two clamp plates 141 respectively, the two clamp plates 141 are slidably connected to the two third sliding grooves 143 along the length direction parallel to the piston rods of the second cylinders 142 respectively, the two clamp plates 141 are arranged opposite to each other, and the length direction of the clamp plates 141 is parallel to the width direction of the workbench 1.

The stamping die 3 is placed on the top surface of the second slider 133, the two clamping plates 141 are respectively positioned at two sides of the stamping die 3, then the piston rods of the two second air cylinders 142 are driven to contract, and the two clamping plates 141 approach each other and firmly clamp the stamping die 3.

Referring to fig. 2 and 3, the mounting post 152 is connected to the flushing device 2, and the flushing device 2 ejects a cooling fluid to flush and cool the stamping die 3 during the punching process. The flushing device 2 comprises a swivel 21, a pump body 26, a pipe 22, a spray head 27, a bellows 23 and a deformable transfer pipe 261.

Referring to fig. 2 and 3, the rotating ring 21 is sleeved and coaxially and rotatably connected to the mounting post 152, and the mounting post 152 is connected to a first driving member, which drives the rotating ring 21 to rotate. The first driving element comprises a first motor 211 and a gear 212, the first motor 211 is embedded in the mounting column 152, an output shaft of the first motor 211 vertically extends upwards and is coaxially and fixedly connected to the gear 212, the gear 212 is rotatably connected to the mounting column 152, an annular tooth groove 213 matched with the gear 212 is formed in the circumferential inner wall of the rotating ring 21, the annular tooth groove 213 is located in the center of the rotating ring 21 in the axial direction, the annular tooth groove 213 is not in contact with the outer wall of the mounting column 152, and the gear 212 partially extends out of the mounting column 152 and is connected to the annular tooth groove 213 in a meshing manner.

The gear 212 is driven to rotate by driving the output shaft of the first motor 211, and the gear 212 rotates to drive the rotary ring 21 meshed with the gear 212 to rotate and be connected to the mounting rod 15.

Referring to fig. 2 and 3, the duct 22 includes a first pipe 221 and a second pipe 222, the first pipe 221 is disposed in an L shape, one end of the first pipe 221 is fixedly connected to the side wall of the swivel 21, the other end of the first pipe 221 is disposed vertically downward, one end of the second pipe 222 is fixedly connected to the bottom end of the first pipe 221, and the other end of the second pipe 222 is disposed toward the discharge electrode 16. Two ends of the bellows 23 are respectively fixedly connected to one end of the second pipe 222 away from the first pipe 221 and the nozzle 27. The spray head 27 is a flat nozzle fan-shaped spray head 27, and the cooling liquid sprayed by the spray head 27 is spread in a fan shape, so that the contact area between the cooling liquid and the surface of the stamping die 3 can be increased, and the cleaning effect on the surface of the stamping die 3 is further improved.

Referring to fig. 2 and 3, the pump body 26 is fixedly connected to the moving rod 151, both ends of the transfer pipe 261 are respectively communicated with the pump body 26 and the first pipe 221, and the pump body 26 is further communicated with a liquid suction pipe 262. The operator connects the liquid suction pipe 262 with the external cooling liquid, the pump body 26 sucks the cooling liquid and conveys the cooling liquid out of the conveying pipe 261, and after the cooling liquid comes out of the conveying pipe 261, the cooling liquid passes through the first pipe 221, the second pipe 222 and the corrugated pipe 23 in sequence and is finally sprayed out of the spray head 27. The swivel 21 can be rotated back and forth, and the rotation of the swivel 21 does not have a great influence on the transfer pipe 261.

Referring to fig. 2 and 3, the nozzle 27 is connected to a spring 24, and both ends of the spring 24 are fixedly connected to a top end of the nozzle 27 and an outer wall of the second pipe 222 facing the nozzle 27, respectively. In order to protect the spring 24, the nozzle 27 is further connected with a first casing 251 and a second casing 252, the first casing 251 is coaxially and slidably connected to the second casing 252, ends of the first casing 251, which are far away from the second casing 252, are respectively arranged on the second pipe 222 and the nozzle 27, and the length directions of the first casing 251 and the second casing 252 are parallel to the length direction of the spring 24 and the spring 24 is sleeved inside.

When no external force is applied to the pipe 22 and the spray head 27, i.e., the cooling liquid does not flow through the pipe 22, the spray head 27 is always disposed toward the discharge electrode 16 by the spring 24; when the cooling liquid is completely introduced into the pipeline 22, the cooling liquid flows onto the spray head 27 along the direction of the pipeline 22 and impacts the spray head 27 to a certain extent, so that the spray head 27 rotates downwards to face the position right below the discharge electrode 16 against the elastic force of the spring 24 and the supporting force of the corrugated pipe 23, namely, the spray head 27 sprays the surface near the drill hole of the stamping die 3 towards the drill hole, after the drill hole is drilled, the introduction of the cooling liquid is stopped, the impact force of the cooling liquid on the spray head 27 is gradually smaller than the elastic force of the spring 24, the spray head 27 rotates upwards gradually, and the cooling liquid sprayed out of the spray head 27 is swept towards the drill hole for a certain distance, so that impurities can be further swept away from the drill hole, and the cleanness of the drill hole is kept.

Referring to fig. 1 and 4, a rail 17 is fixedly connected to the top surface of the workbench 1, the rail 17 is made of a transparent material, the rail 17 encloses the first slider 123 and the second slider 133, when the two clamping plates 141 clamp the stamping die 3, the moving range of the stamping die 3 is limited within the rail 17, the projection of the discharge electrode 16 on the workbench 1 is located at the center of the rail 17, four inner walls of the rail 17 are respectively opposite to four outer walls of the stamping die 3, distance sensors 171 are respectively fixed on the four inner walls of the rail 17, and the distance sensors 171 are used for measuring the distance from the inner walls of the rail 17, which are opposite to each other, to the outer walls of the stamping die 3. The controller is embedded in the bracket 11, receives the measured values of the four distance sensors 171 and controls the rotation of the output shaft of the first motor 211 through calculation, so that the spray head 27 sprays cooling liquid towards one side of the perforation away from the center of the stamping die 3 all the time.

The distance between the inner wall of the fence 17 and the outer wall of the stamping die 3, which are arranged opposite to each other, is measured by the distance sensor 171, so that the specific position of the projection of the stamping die 3 on the workbench 1 at present can be embodied, and the specific position of the projection of the discharge electrode 16 on the workbench 1 can be indirectly obtained because the position of the projection of the discharge electrode 16 on the workbench 1 is fixed, so that the spray head 27 is moved to one side of the discharge electrode 16 facing the center of the stamping die 3, then the spray head 27 sprays cooling liquid towards one side of the perforation away from the center of the stamping die 3, and after the cooling liquid sprays the periphery of the perforation of the stamping die 3, the cooling liquid can directly flow out of the surface of the stamping die 3 at the fastest speed, thereby reducing the probability that the cleaned cooling liquid stays on the stamping die 3, and improving the cleaning effect of the stamping die 3.

The implementation principle of the puncher of the embodiment of the application is as follows: the operator places the press mold 3 on the second slide block 133, and then drives the piston rods of the two second air cylinders 142 to contract, so that the two clamp plates 141 clamp the press mold 3. Then, the punching die 3 is moved to a position to be punched by driving the output shafts of the third motor 122 and the fourth motor 132 to rotate, then the mounting rod 15 is driven to move downwards to the discharge electrode 16 to punch the surface of the punching die 3, in the punching process, the pump body 26 feeds the cooling liquid into the transmission pipe 261, then the cooling liquid is sprayed out from the spray head 27 through the pipeline 22 and the corrugated pipe 23 to cool and clean the punched position of the punching die 3, after the drilling is finished, the mounting rod 15 moves upwards to the discharge electrode 16 away from the punching die 3, then the feeding of the cooling liquid is stopped, the spray head 27 gradually rotates upwards for a certain distance under the elastic force of the spring 24, at this time, the cooling liquid sprayed out from the spray head 27 can scan towards the drilled position for a certain distance, so that impurities can be further swept away from the drilled position, and the drilled position is kept clean.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a puncher, includes workstation (1), be equipped with support (11) on workstation (1), there is discharge electrode (16) along vertical direction sliding connection on support (11), swing joint has anchor clamps (14) that are used for the centre gripping work piece on workstation (1), its characterized in that: the discharge electrode device is characterized in that an installation rod (15) is connected to the support (11) in a sliding mode along the vertical direction, the discharge electrode (16) is arranged on the installation rod (15) and connected with the support (11) through the installation rod (15), a liquid flushing device (2) is connected to the installation rod (15), and the liquid flushing device (2) is used for conducting liquid flushing cooling on a workpiece;

the liquid flushing device (2) comprises a rotating ring (21), a pump body (26), a pipeline (22), a spray head (27) and a deformable transmission pipe (261), the rotating ring (21) is located above the discharge electrode (16), the rotating ring (21) is sleeved and coaxially connected to the mounting rod (15) in a rotating mode, the pump body (26) is arranged on the mounting rod (15), two ends of the pipeline (22) are respectively connected with the mounting rod (15) and the spray head (27), the spray head (27) faces to the position under the discharge electrode (16), two ends of the transmission pipe (261) are respectively communicated with the pump body (26) and the pipeline (22), the pump body (26) extracts external cooling liquid and drives the cooling liquid to sequentially pass through the transmission pipe (261) and the pipeline (22) and finally to be sprayed out of the spray head (27), and the driving part drives the rotating ring (21) to rotate;

still include spring (24), be equipped with bellows (23) on shower nozzle (27), shower nozzle (27) are fixed on pipeline (22) through bellows (23), the one end that pipeline (22) are close to shower nozzle (27) is the slope setting, one end that pipeline (22) are close to shower nozzle (27) sets up towards discharge electrode (16) under, the both ends of spring (24) set up respectively on pipeline (22) and shower nozzle (27), when there is not external force to exert on pipeline (22) and shower nozzle (27), shower nozzle (27) are towards discharge electrode (16) setting all the time under the effect of spring (24), when letting in the coolant liquid completely in pipeline (22), shower nozzle (27) are towards discharge electrode (16) under the impulsive force effect of coolant liquid and are set up.

2. The piercing machine of claim 1, wherein: the first driving piece comprises a first motor (211) and a gear (212), the first motor (211) is arranged in the mounting rod (15), an output shaft of the first motor (211) is coaxially arranged on the gear (212), a ring tooth groove (213) matched with the gear (212) is formed in the circumferential inner wall of the rotating ring (21), and the gear (212) is connected to the ring tooth groove (213) in a meshed mode.

3. The piercing machine of claim 1, wherein: be equipped with rail (17) on workstation (1), the projection of discharge electrode (16) on workstation (1) is located rail (17) center, including rail (17) surround anchor clamps (14), after anchor clamps (14) centre gripping work piece, the home range of work piece is in rail (17), four inner walls of rail (17) are just to four outer walls of work piece respectively, be equipped with distance sensor (171) on four inner walls of rail (17) respectively, distance sensor (171) are used for measuring each other just to the distance of rail (17) inner wall to the work piece outer wall that sets up, support (11) are equipped with the controller, the controller receives the measurement numerical value of four distance sensor (171) and controls the rotation of first motor (211) output shaft through calculating, shower nozzle (27) are towards the perforation all the time and are kept away from the one side blowout coolant liquid at work piece center.

4. The piercing machine of claim 1, wherein: the spray nozzle is characterized by further comprising a first protective barrel (251) and a second protective barrel (252) which are connected with each other in a sliding mode, one ends, far away from each other, of the first protective barrel (251) and the second protective barrel (252) are arranged on the pipeline (22) and the spray head (27) respectively, and the length directions of the first protective barrel (251) and the second protective barrel (252) are parallel to the length direction of the spring (24) and are sleeved with the spring (24).

5. The piercing machine of claim 1, wherein: the spray head (27) is a flat nozzle fan-shaped spray head (27).

6. A perforator according to claim 3 wherein: the enclosure (17) is made of a transparent material.