CN114769762B - Integral cathode device and method for synchronous feeding follow-up flushing liquid - Google Patents
Integral cathode device and method for synchronous feeding follow-up flushing liquid Download PDFInfo
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- CN114769762B CN114769762B CN202210499155.9A CN202210499155A CN114769762B CN 114769762 B CN114769762 B CN 114769762B CN 202210499155 A CN202210499155 A CN 202210499155A CN 114769762 B CN114769762 B CN 114769762B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
- B23H3/04—Electrodes specially adapted therefor or their manufacture
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H3/00—Electrochemical machining, i.e. removing metal by passing current between an electrode and a workpiece in the presence of an electrolyte
- B23H3/10—Supply or regeneration of working media
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23H—WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OF ELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKES THE PLACE OF A TOOL; SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL
- B23H9/00—Machining specially adapted for treating particular metal objects or for obtaining special effects or results on metal objects
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Abstract
The invention relates to an integral cathode device and method for synchronously feeding follow-up flushing liquid, and belongs to the field of electrolytic machining. The device is characterized in that: in order to avoid machining errors caused by positioning and assembling of a separated cathode device, the liquid guide cover and the cathode tool form an integral cathode device through a slewing bearing, so that synchronous feeding machining is realized. In the structure of the device, the cathode tool is connected with a main shaft of a machine tool, the inner ring of the slewing bearing is connected with the cathode tool, the outer ring of the slewing bearing is connected with the liquid guide cover, and the cathode tool and the liquid guide cover can synchronously feed and relatively rotate. The side seal water slide blocks are assembled in the sliding grooves on two sides of the liquid guide cover, and the spring plungers are assembled in the round holes on two sides of the lower liquid guide cover, so that in the processing process, the side seal water slide blocks are dynamically attached to two sides of the blisk by elasticity, and the continuous follow-up liquid flushing function is realized. By adopting the integral cathode device, the liquid guide cover and the cathode tool are synchronously fed through the slewing bearing, so that the separation type assembly process is simplified, the positioning precision and the processing efficiency are improved, and the electrolytic processing quality of the blisk is ensured.
Description
Technical Field
The invention belongs to the technical field of electrolytic machining, and particularly relates to an integral cathode device and method for synchronously feeding follow-up flushing liquid.
Background
The aerospace engine is taken as a core power component, is an important component of a modern aerospace vehicle, and is known as a 'bright bead on a modern industrial crown' in the field of high-end manufacturing. With the continuous improvement of the aerospace technology, the aero-engine is continuously developed towards the directions of high thrust-weight ratio, low power consumption and high reliability, and integral components such as an integral diffuser, a blisk and the like are widely applied as parts capable of remarkably improving the performance of the engine. The blisk is used as a novel integral structural component, combines the blades and the wheel disc into a whole, gradually replaces the tenon and mortise connecting structure of the traditional blisk, and has great significance for the development of aviation industry in China. In recent years, the blisk materials gradually adopt high-strength, high-hardness and high-toughness materials such as titanium alloy, high-temperature alloy and the like, the overall structure of the blisk materials gradually develops towards the directions of ultrathin, high-precision, large-twist blades and narrow channels, great difficulty is brought to blisk manufacture, the use requirements are difficult to meet only by using the traditional blisk machining method, more advanced machining technologies must be researched, and the machining process with low cost, high efficiency and high precision is explored.
Electrolytic machining is a technology for removing metal materials based on the electrochemical dissolution principle of a metal anode, and is a technological method for machining and forming a workpiece according to a certain shape and size by means of a preformed cathode. Compared with other processing methods, the electrolytic processing has unique advantages, including high processing efficiency, capability of processing high-hardness difficult-to-cut metal materials, good processing surface quality, no loss of tool cathodes, no residual stress in processing complex structures and the like, and has great application value in blisk manufacturing.
Generally, the electrolytic machining of the blisk is divided into two working procedures: blade cascade channel pre-machining and blade profile finishing. The blade grid channel preprocessing, namely, preprocessing the blade grid channel similar to the blade in shape on the blisk blank to form the blade blank with a certain allowance and precision, and aims to remove most blank materials and provide a space for placing the profile electrode for subsequent finish machining so as to achieve a good profile finish machining effect. The finish machining process adopts the forming electrodes to move into the prefabricated blade disc channel, and the ideal blade profile precision forming is completed through the electrolytic machining of the two forming electrodes by moving in opposite directions. The processing efficiency and the surface quality of the cascade channels are improved, the manufacturing requirement of the complex-profile leaf disc is met, and the cascade structure is one of the purposes and key contents of the development of the electrolytic processing technology.
In the patent 'voltage regulation-based cone hub blisk multi-blade grid electrolysis device and method' (application number 202110265686.7, applicant, nanjing aviation aerospace university, inventor Zhu Diliu, gauss Zong Yawei Xu Zhengyang), cone hub profile machining is achieved through synchronous eccentric swing feeding of a hollow tool cathode array in combination with compound motion of workpiece rotation. Compared with the method, the invention adopts the synchronous feeding of the integral cathode device and the rotary compound movement of the workpiece to realize the processing of the blade grid channel.
In the patent ' blade/blisk omnidirectional feed pulse dynamic precision electrolytic machining device and method ' (application number 202110598369.7 applicant's Nanjing aviation aerospace university, inventor Liu Jiazhu triarrhena Wang Haoliu) a machining cavity with a closed side wall is enclosed between four tool cathodes and is simultaneously subjected to uniform feed motion to finish machining.
In the patent ' an electromagnetic control type blisk electrolytic machining device and method ' (application number 202110929851.4 applicant's university of fertilizer industry, inventor Zhang Juchen Liu Yangchen is Hua Changwei J), an electromagnetic control type blisk electrolytic machining device and method are provided, which are different from the traditional jacking type, radial type or rotary feeding type blisk machining method. Compared with the method, the integral cathode device is adopted to synchronously feed and process the blade grid channels of the blisk.
In the patent ' a non-uniform speed double-rotation blisk cascade channel electrolytic machining method ' (application number 201910756930.2 applicant's Nanjing aviation aerospace university, inventor Xu Zhengyang Wangzhu triarrhena), a fixture is adopted for fixing, tool cathode rotation feeding and blisk rotation feeding are combined to move, and the processed cascade channels are uniform in allowance and high in surface quality. Compared with the method, the liquid guide cover and the cathode tool integrally and synchronously move, so that the assembly time of the cathode device is simplified.
In the patent 'rotary opening tool and method for electrolytic forming of blisk' (application number 201911052748.5 applicant is Shenyang dawn aeroengine Limited liability company, inventor Zheng Xinliu sea wave band constant Chen Dong), rotary opening sleeve assembly is adopted to assemble and move through shaft clamp, and rotary opening processing of blisk variable camber blades is completed. Compared with the invention, the integrated cathode structure is adopted, and the electrolyte is drained in the liquid guide cover to finish processing.
In the patent ' an integral inner cavity screw feeding electrolytic machining clamp ' (application number 201720221638.7, applicant's university of Anhui and Hui university, inventor Zhang Xingguang Sun Lunye Zhou Qinghong Wang Longzhang, huang Shaofu), an electrolytic clamp is designed to solve the problems of electrolyte leakage and flow field disturbance, and consists of a clamp body, a drainage block, a tool cathode and a cathode rod sealing device. However, the fixture is continuously fixed in the processing process, and compared with the fixture, the liquid guide cover synchronously moves along with the cathode tool in a feeding way.
In the patent ' dynamic auxiliary liquid supply clamp and liquid supply mode of blisk cascade channel electrolytic machining ' (application number 201410226399.5 applicant's Nanjing aviation aerospace university, inventor Zhu Dongzhang gathers to minister Liu Jiafang to the east Zhang Kuanglei Xu Zhengyang Zhu Di), a dynamic auxiliary liquid supply clamp and liquid supply mode are provided, an electrolyte flow field is improved, and machining stability and efficiency are improved. In contrast, the flow field random bed of the integral cathode device moves together and continuously drives the liquid to flow.
In the patent "space rotary feed composite workpiece tilting and swinging blisk electrolytic machining method" (application number 201410457130.8 applicant's south Beijing aviation aerospace university, inventor Zhu Donggu, liu Jiafang loyal Xu Zhengyang Zhu Di), blisk cascade channel electrolytic machining is accomplished by means of tool electrode space rotary feed composite workpiece tilting and swinging. Compared with the method, the integral cathode device designed by the invention synchronously feeds the composite workpiece to rotate so as to complete the formation of the cascade channels.
In the patent "blisk electrolytic machining tool and method capable of being fed in a combined manner in a straight line and in a rotary manner" (application number 201410013249.6 applicant's Nanjing aviation aerospace university, inventor Xu Zhengyang Zhang Juchen Liu Jiazhu a Zhu Di), an electrolytic machining cathode is fed in a rotary manner along the axis direction of a cathode connecting rod, and simultaneously a workpiece is rotated around the axis of the workpiece, and a clamp is independently fixed. Compared with the prior art, the liquid guide cover and the cathode tool form an integral structure, and synchronously feed and simultaneously rotate the cathode.
In the patent 'electrode for blisk electrolytic slotting and blisk electrolytic slotting processing method' (application number 201210367002.5 applicant Shenyang dawn aeroengine Limited liability company, inventor Wang Dexin cinhainan Yu Bingcheng Wen Juan), the cathode is of a hollow finger structure, an electrolyte channel is arranged in the cathode, and the machining allowance is uniform and the replication precision is high. Compared with the method, the integral cathode device is adopted to synchronously feed to form the blade grid channels, and the electrolyte is circulated by the follow-up flushing.
At present, in the cascade channel preprocessing process, a workpiece is assembled on a machine tool rotating platform, a liquid guide cover and a cathode tool are often assembled on the machine tool in a separated mode, a cathode is connected with a machine tool shaft for radial feeding processing, and the liquid guide cover is fixed on the machine tool platform through a connecting base and kept static. Before machining, the liquid guide cover and the cathode tool are required to be positioned and assembled respectively, so that the interference between the cathode tool and the liquid guide cover in the feeding process is avoided, and the preparation time of the blisk before electrolytic machining is increased. In addition, in the processing period, the liquid guide cover needs to be repeatedly disassembled and assembled to judge the state of the processed cathode and the processing quality of the blade blank, so that the whole processing procedure is complicated. Therefore, in order to solve the problems, simplify the positioning and assembling steps of the liquid guide cover and the cathode tool, improve the processing efficiency in the whole processing period, and provide an integral cathode device for synchronously feeding the follow-up flushing liquid.
Disclosure of Invention
The invention aims to provide an integral cathode device for synchronously feeding follow-up flushing liquid, which is characterized in that a liquid guide cover and a cathode tool are assembled to form an integral structure for synchronous feeding, the follow-up flushing liquid in the electrolytic machining process is realized through a spring plunger and a side seal water slide block, the assembly and positioning procedures of the separated cathode device are simplified, the repeated assembly of the liquid guide cover in the machining process is avoided, the positioning precision and the machining efficiency of the preprocessing of a blisk blade grid channel are improved, and the electrolytic machining quality of a blisk is ensured.
The integral cathode device for synchronously feeding the follow-up flushing liquid is characterized by comprising a fixture clamp arranged on a machine tool rotating platform and a gun platform arranged on the fixture clamp; comprises a cathode connected with a main shaft of a machine tool through a cathode adapter rod; the rotary bearing is arranged on the cathode adapter rod, and the inner ring is matched with the cathode adapter rod; comprises a water sealing cover rear seat and a water sealing cover which are sleeved on the outer side of the cathode; comprises an upper liquid guide cover, a lower liquid guide cover and a side water sealing slide block; the upper liquid guide cover is provided with a liquid inlet, the rear part of the upper liquid guide cover is matched with the outer ring of the slewing bearing, and the lower surface of the front part of the upper liquid guide cover is provided with a left upper chute and a right upper chute; the lower liquid guide cover is provided with a liquid outlet, the rear part of the lower liquid guide cover is matched with the outer ring of the slewing bearing, the upper surface of the front part of the lower liquid guide cover is provided with a left lower chute and a right lower chute, a boss is arranged behind each lower chute, the front end surface of the boss is provided with a plunger mounting hole, and a spring plunger is mounted in the plunger mounting hole; the side sealing water slide block comprises a left slide groove and a right slide groove which are respectively arranged between the upper slide groove and the lower slide groove on the corresponding sides; and the rear end face of the side sealing water slide block is in contact fit with the spring plunger.
The processing method of the integral cathode device for synchronously feeding the follow-up flushing liquid is characterized by comprising the following steps of: the method comprises the steps of (1) assembling and fixing a gun platform on a tool clamp of a machine tool rotating platform, so that a gun platform arc central shaft is coaxial with a workpiece rotating shaft; assembling and fixing the blisk blank sector on a gun platform, wherein the arc central axis of the sector is coaxial with the arc central axis of the gun platform, and the blisk blank sector is connected with the anode of an electrolytic machining power supply; step S2-1: the cathode is assembled on the cathode adapter rod, and is sleeved with a water sealing cover which is connected with a water sealing cover rear seat, and the water sealing cover is in clearance fit with the cathode and the cathode adapter rod; the cathode adapter rod is assembled on a machine tool spindle and moves along a cathode rotary feed shaft, and the machine tool spindle is connected with the cathode of an electrolytic machining power supply; step S2-2: the spring plunger is assembled in plunger mounting holes at the front ends of bosses at two sides of the lower liquid guide cover, the left side sealing water slide block and the right side sealing water slide block are respectively assembled in lower sliding grooves at two sides of the lower liquid guide cover, the side sealing water slide blocks slightly press the spring plunger, the upper liquid guide cover and the lower liquid guide cover are fixed, the upper sliding groove of the upper liquid guide cover is matched with the side sealing water slide blocks, and finally the upper liquid guide cover, the lower liquid guide cover and the side sealing water slide blocks are formed into an integral structure; step S2-3: the inner ring of the slewing bearing is connected with a cathode adapter rod, the outer ring of the slewing bearing is respectively connected with an upper liquid guide cover and a lower liquid guide cover, the front end of the upper liquid guide cover is arranged at the upper end of a blisk blank sector, a liquid inlet pipe is connected with a liquid inlet of the upper liquid guide cover, and a liquid outlet pipe is connected with a liquid outlet of the lower liquid guide cover to realize electrolyte circulation; step S3-1: driving the blisk blank sector to rotate to a position to be processed of the cascade channel, driving the integral structure of the liquid guide cover and the cathode tool to an optimal feeding position for processing the cascade channel, and enabling the side water sealing slide block to be in contact with the blisk blank sector; step S3-2: starting an electrolyte circulation system to feed electrolyte, switching on an electrolytic machining power supply, and running a numerical control program according to a set machining track to drive the integral structure of the liquid guide cover and the cathode tool to perform radial feeding motion along the radial direction of the blisk blank sector, wherein the cathode performs rotary feeding composite motion, and the upper liquid guide cover and the lower liquid guide cover only perform feeding motion; simultaneously, the blisk blank sector rotates around the workpiece rotating shaft to finish the coarse machining of the cascade channel and the machining of the She Panlun hub surface; step S3-3: when the processing of the blade grid channels and the hub surface is finished, the electrolytic processing power supply is disconnected, and the electrolyte circulation system is closed to stop electrolyte supply; step S4: and driving the integral structure of the liquid guide cover and the cathode tool to retract to an initial position, driving the blisk blank sectors to rotate by 360/n deg, wherein n is the number of blades, repeating the processing steps in sequence, preprocessing the next group of cascade channels, and finally finishing the preprocessing of all the cascade channels of the blisk blank sectors.
The machining method of the integral cathode device for synchronously feeding the follow-up flushing liquid is characterized in that on one hand, a liquid guide cover in the cathode device and a cathode tool form an integral structure through a slewing bearing to be assembled on a main shaft of a machine tool to realize synchronous feeding movement, and radial feeding machining is performed towards a blisk. On the other hand, the spring plunger guarantees that the side seal water sliding blocks and the blisk are relatively static, so that the side seal water sliding blocks are continuously attached to two sides of a blisk cascade channel under the elasticity in the feeding processing process, and the continuous follow-up flushing effect is achieved.
The processing method of the integral cathode device for synchronously feeding the follow-up flushing liquid is characterized in that the slewing bearing consists of an inner ring and an outer ring, and is made of carburized stainless steel. A precise rolling path is arranged in each ring and used for transmitting load and overcoming rotation resistance so as to enable the inner ring and the outer ring of the bearing to rotate relatively. The inner ring of the slewing bearing is connected with the cathode tool, and the outer ring of the slewing bearing is connected with the liquid guide cover, so that the integral cathode device can synchronously feed and relatively rotate. In the synchronous feeding processing process, as the blisk is kept fixed, the water sealing sliding block at the inner side of the integral cathode device is extruded by the spring plunger so as to be tightly attached to the end face of the integral She Panyuan arc to realize follow-up flushing. After the machining is finished, in the back-off process of the integral cathode device, the spring plunger automatically restores the initial shape to enable the side seal water slide block to be continuously attached to restore to the initial position.
The beneficial effects are that: compared with the prior art, the invention has the following remarkable characteristics:
(1) The liquid guide cover and the cathode tool are integrally assembled, so that the traditional separated positioning assembly process is simplified, the situation that the liquid guide cover is singly required to be fixed by a supporting platform is avoided, the processing space is optimized, the assembly preparation time of the cathode device is shortened, and the assembly efficiency is improved.
(2) The liquid guide cover and the cathode tool do not need to be positioned and assembled respectively, so that the interference between the cathode tool and the liquid guide cover in the feeding process is avoided, the error generated in the assembly and positioning process is reduced, and the positioning precision of the liquid guide cover and the cathode tool is improved.
(3) The integral cathode device is adopted, the liquid guide cover is not required to be detached and separated in the cathode replacement processing process, and the liquid guide cover and the cathode tool can be completely separated only by detaching screws connected with the liquid guide cover on the outer ring of the slewing bearing. In the process of replacing the liquid guide cover, the side seal water slide block or the spring plunger, the cathode does not need to be separated and processed, and the replacement can be completed only by independently disassembling the upper liquid guide cover or the lower liquid guide cover, so that the flexibility of the integral cathode device is improved.
(4) By adopting the follow-up liquid flushing device, electrolyte is prevented from leaking from the gap between the liquid guide covers at the two sides and the blisk in the synchronous feeding and retreating process of the integral cathode device, the stability of a flow field in the whole processing process is improved, and the processing precision is ensured.
(5) The integral cathode device is adopted to synchronously feed the follow-up flushing liquid, so that a liquid guide cover is not required to be disassembled and assembled in the whole processing period, the main shaft of the machine tool is directly retracted, the integral cathode device is separated from the blisk workpiece, and the blisk workpiece can be rotated conveniently to change the processing position.
(6) And the integral cathode device is synchronously retracted in the machining process, so that the machining cathode state and the machining quality of the blade blank can be judged, the whole machining process is optimized, the electrolytic machining process is more flexible and controllable, and the machining efficiency in the whole machining period is improved.
Drawings
FIG. 1 is a schematic view of the electrolytic machining process of a blisk in accordance with the present invention;
FIG. 2 is a schematic view of the integral structure of the liquid guiding cover and the cathode tool in the invention;
FIG. 3 is a schematic cross-sectional view of a spring plunger and a side seal water slider of a liquid guiding cap according to the present invention
FIG. 4 is a schematic view of the initial position of the blisk in the present invention;
FIG. 5 is a schematic view of the end position of the blisk in the present invention;
reference numerals in the figures: the cathode rotary feed shaft 1, the machine tool spindle 2, the cathode adapter rod 3, the slewing bearing 4, the upper liquid guide cover 5, the upper sliding chute 5-1, the blisk blank sector 6, the cannon block 7, the fixture 8, the workpiece rotating shaft 9, the cathode 10, the side water sealing slide block 11, the water sealing cover back seat 12, the spring plunger 13, the lower liquid guide cover 14, the lower sliding chute 14-1, the boss 14-2, the plunger mounting hole 14-3, the water sealing cover 15, the slewing bearing outer ring 16, the slewing bearing inner ring 17, the electrolyte inlet 18 and the electrolyte outlet 19.
Description of the embodiments
The technical scheme of the invention is further described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, in the blisk electrolytic machining of the invention, a blisk blank sector 6 is used as an anode workpiece, and is connected with a gun platform 7 to be assembled on a tool fixture 8 of a machine tool rotating platform together, so that the rotating motion is realized around a workpiece rotating shaft 9; the cathode 10 and the cathode adapter rod 3 are connected and jointly fixed on the machine tool spindle 2, and the water sealing cover back seat 12 and the water sealing cover 15 are connected to play a role in sealing water for the cathode 10. The inner ring 17 of the slewing bearing is connected with the cathode adapter rod 3, and the outer ring 16 of the slewing bearing is respectively connected with the upper liquid guide cover 5 and the lower liquid guide cover 14, so that the liquid guide covers (5, 14) and the cathode tools (3, 10, 12, 15) form an integral structure to synchronously feed along the cathode rotary feed shaft 1. In the electrolytic process, electrolyte is fed from a liquid inlet 18 of the upper liquid guide cover 5, and is discharged from a liquid outlet 19 of the lower liquid guide cover 14 to realize electrolyte circulation, a side water sealing slide block 11 is arranged between the liquid guide covers, a spring plunger 13 is arranged in a round hole of the lower liquid guide cover, and continuous follow-up liquid flushing function is realized in the processing process.
The synchronous feeding electrolytic machining process of the integral cathode device comprises the following steps:
step S1: the gun platform 7 is assembled and fixed on a tool fixture 8 of a machine tool rotary platform, so that the arc central shaft of the gun platform is coaxial with a workpiece rotary shaft 9. And assembling and fixing the blisk blank sector 6 on the gun platform 7, wherein the circular arc central axis of the sector is coaxial with the circular arc central axis of the gun platform, and the blisk blank sector 6 is connected with the anode of an electrolytic machining power supply.
Step S2-1: the cathode 10 is assembled on the cathode adapter rod 3, and is sleeved with a water sealing cover 15 and connected by a rear seat 12. The water seal cover 15 ensures clearance fit with the cathode 10 and the cathode adapter rod 3. The cathode adapter rod 3 is assembled on a machine tool spindle 2 through an inner hole and moves along the cathode rotary feed shaft 1, and the machine tool spindle is connected with the cathode of an electrolytic machining power supply.
Step S2-2: the spring plunger 13 is assembled in round holes on two sides of the lower liquid guide cover 14, the side water sealing slide blocks 11 are assembled in sliding grooves on two sides of the lower liquid guide cover 14, the side water sealing slide blocks 11 slightly push the spring plunger 13, the upper liquid guide cover 5 and the lower liquid guide cover 14 are fixed, the sliding grooves of the upper liquid guide cover 5 are matched with the side water sealing slide blocks 11, and finally the liquid guide covers (5 and 14) and the side water sealing slide blocks 11 are formed into an integral structure.
Step S2-3: the inner ring 17 of the slewing bearing is connected with the cathode adapter rod 3, the outer ring 16 of the slewing bearing is respectively connected with the upper liquid guide cover 5 and the lower liquid guide cover 14, the front end of the upper liquid guide cover 5 is arranged at the upper end of the blisk blank sector 6, a liquid inlet pipe is connected with the liquid inlet 18 of the upper liquid guide cover 5, and a liquid outlet 19 of the lower liquid guide cover is connected with a liquid outlet pipe to realize electrolyte circulation.
Step S3-1: the blisk blank sector 6 is driven to rotate to a position to be processed of the cascade channel, the integral structure of the liquid guide cover and the cathode tool is driven to an optimal feeding position for processing of the cascade channel, and the side seal water sliding block 11 is contacted with the blisk blank sector 6.
Step S3-2: and starting an electrolyte circulation system to supply electrolyte, switching on an electrolytic machining power supply, and running a numerical control program according to a set machining track to drive the integral structure of the liquid guide cover and the cathode tool to radially perform feeding motion along the radial direction of the blisk blank sector 6, wherein the cathode 10 performs rotary feeding composite motion, and the liquid guide covers (5 and 14) only perform feeding motion. Simultaneously, the blisk blank sector 6 rotates around the workpiece rotating shaft 9 to finish the coarse machining of the cascade channels and the machining of the She Panlun hub surface.
Step S3-3: when the processing of the blade grid channels and the hub surface is finished, the electrolytic processing power supply is disconnected, and the electrolyte circulation system is closed to stop electrolyte supply.
Step S4: and driving the integral structure of the liquid guide cover and the cathode tool to retract to an initial position, driving the blisk blank sector 6 to rotate by 360/n deg (n is the number of blades), sequentially repeating the processing steps, and preprocessing the next group of cascade channels to finally finish the preprocessing of all the cascade channels of the blisk blank sector 6.
Claims (2)
1. An integral cathode device for synchronously feeding follow-up flushing liquid is characterized in that:
the tool comprises a tool clamp (8) arranged on a machine tool rotating platform and a gun platform (7) arranged on the tool clamp (8);
comprises a cathode (10) connected with a main shaft of a machine tool through a cathode adapter rod (3);
comprises a slewing bearing (4) which is arranged on a cathode adapter rod (3) and the inner ring of which is matched with the cathode adapter rod (3);
comprises a water sealing cover rear seat (12) sleeved on the outer side of the cathode (10) and a water sealing cover (15);
comprises an upper liquid guide cover (5), a lower liquid guide cover (14) and a side water sealing slide block (11); wherein the upper liquid guide cover (5) is provided with a liquid inlet (18), the rear part of the upper liquid guide cover (5) is matched with the outer ring of the slewing bearing (4), and the lower surface of the front part is provided with a left upper chute (5-1) and a right upper chute; the lower liquid guide cover (14) is provided with a liquid outlet (19), the rear part of the lower liquid guide cover (14) is matched with the outer ring of the slewing bearing (4), the upper surface of the front part is provided with a left lower chute (14-1) and a right lower chute (14-1), a boss (14-2) is arranged behind each lower chute (14-1), the front end surface of the boss (14-2) is provided with a plunger mounting hole (14-3), and a spring plunger (13) is mounted in the plunger mounting hole; the side water sealing slide block (11) comprises a left slide groove and a right slide groove which are respectively arranged between the upper slide groove (5-1) and the lower slide groove (14-1) on the corresponding sides; and the rear end face of the side seal water slide block (11) is in contact fit with the spring plunger (13).
2. A method of processing a monolithic cathode assembly utilizing a synchronous feed follow-up rinse as set forth in claim 1, comprising the steps of:
step S1: assembling and fixing a gun platform (7) on a tool fixture (8) of a machine tool rotating platform, so that a gun platform arc central shaft and a workpiece rotating shaft (9) are coaxial; assembling and fixing a blisk blank sector (6) on a gun platform (7), wherein the circular center axis of the sector is coaxial with the circular center axis of the gun platform, and the blisk blank sector (6) is connected with an electrolytic machining power supply anode;
step S2-1: the cathode (10) is assembled on the cathode adapter rod (3) and sleeved with a water sealing cover (15) which is connected by a water sealing cover back seat (12), and the water sealing cover (15) is in clearance fit with the cathode (10) and the cathode adapter rod (3); the cathode adapter rod (3) is assembled on a machine tool main shaft (2) and moves along a cathode rotary feed shaft (1), and the machine tool main shaft is connected with the cathode of an electrolytic machining power supply;
step S2-2: the spring plunger (13) is assembled in plunger mounting holes (14-3) at the front ends of bosses (14-2) at two sides of a lower liquid guide cover (14), the left side water sealing slide blocks and the right side water sealing slide blocks (11) are respectively assembled in lower slide grooves (14-1) at two sides of the lower liquid guide cover (14), the side water sealing slide blocks (11) slightly press the spring plunger (13), the upper liquid guide cover (5) and the lower liquid guide cover (14) are fixed, the upper slide groove (5-1) of the upper liquid guide cover (5) is matched with the side water sealing slide blocks (11), and finally the upper liquid guide cover, the lower liquid guide cover and the side water sealing slide blocks (11) are in an integral structure;
step S2-3: the method comprises the steps that a slewing bearing inner ring (17) is connected with a cathode adapter rod (3), a slewing bearing outer ring (16) is respectively connected with an upper liquid guide cover (5) and a lower liquid guide cover (14), the front end of the upper liquid guide cover (5) is placed at the upper end of a blisk blank sector (6), a liquid inlet pipe is connected with a liquid inlet (18) of the upper liquid guide cover (5), and a liquid outlet pipe is connected with a liquid outlet (19) of the lower liquid guide cover to realize electrolyte circulation;
step S3-1: driving the blisk blank sector (6) to rotate to a position to be processed of the cascade channel, driving the integral structure of the liquid guide cover and the cathode tool to an optimal feeding position for processing the cascade channel, and enabling the side sealing water slide block (11) to be in contact with the blisk blank sector (6);
step S3-2: starting an electrolyte circulation system to feed electrolyte, switching on an electrolytic machining power supply, and running a numerical control program according to a set machining track to drive the integral structure of the liquid guide cover and the cathode tool to perform radial feeding motion along the radial direction of the blisk blank sector (6), wherein the cathode (10) performs rotary feeding composite motion, and the upper liquid guide cover and the lower liquid guide cover only perform feeding motion; simultaneously, the blisk blank sector (6) rotates around a workpiece rotating shaft (9) to finish the coarse machining of the cascade channels and the machining of the She Panlun hub surface;
step S3-3: when the processing of the blade grid channels and the hub surface is finished, the electrolytic processing power supply is disconnected, and the electrolyte circulation system is closed to stop electrolyte supply;
step S4: and driving the integral structure of the liquid guide cover and the cathode tool to retract to an initial position, driving the blisk blank sector (6) to rotate by 360/n deg, wherein n is the number of blades, repeating the processing steps in sequence, and preprocessing the next group of cascade channels to finally finish the preprocessing of all the cascade channels of the blisk blank sector (6).
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