CN112317895A

CN112317895A - Integral impeller electrolytic nesting and forming processing device

Info

Publication number: CN112317895A
Application number: CN202011266467.2A
Authority: CN
Inventors: 夏任波; 徐波; 夏健波
Original assignee: Changzhou Xinjiang Intelligent Equipment Co Ltd
Current assignee: Changzhou Xinjiang Intelligent Equipment Co Ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-02-05

Abstract

The invention provides an integral impeller electrolytic nesting and forming device which comprises a machine body and a cross beam, wherein a tool table moving back and forth along the length direction of the machine body is arranged on the machine body, a C shaft is arranged at the center of the tool table, a rotating shaft for fixing a blade disc is horizontally arranged on the C shaft, the cross beam is arranged above the machine body, a main shaft is vertically arranged on the cross beam, and a nesting cathode processing assembly for processing blade prototypes on the blade disc and a blade electrolytic assembly for finely processing the blade prototypes are arranged on the main shaft. The electrolytic nesting and forming device for the integral impeller has the advantages that after a blank of the blade disc is clamped once, rough machining and fine machining of the blade can be completed without repositioning and installing, repeated positioning errors are reduced, machining precision of the blade disc is improved, and a manufacturing period is shortened.

Description

Integral impeller electrolytic nesting and forming processing device

Technical Field

The invention relates to the technical field of electrolytic machining, in particular to an integral impeller electrolytic jacking and forming machining device.

Background

Electrochemical machining is a method for forming a workpiece into a predetermined size and shape by using a tool cathode based on the principle of electrochemical anodic dissolution. During the machining process, the workpiece is connected with the positive pole of a power supply, and the cathode of the tool is connected with the negative pole of the power supply. A certain interelectrode gap is maintained between the workpiece anode and the tool cathode, and an electrolyte flowing at a high speed is introduced into the interelectrode gap to form a conductive path between the workpiece and the cathode. The workpiece material is continuously dissolved and eroded along with the feeding of the cathode to the workpiece, the electrolysis product is taken away by the electrolyte flowing at high speed, and when the cathode is fed to a preset position, the processing is finished. Compared with the traditional processing technology, the electrochemical machining has the advantages of no cathode loss, wide machining range, high machining surface quality and the like, so that the electrochemical machining is widely applied to machining of aeroengine parts such as blisks, diffusers and the like.

In the prior art, when a blisk blank is machined, an impeller channel is machined on a special machine tool firstly, large allowance of the channel is removed, then the machined blisk is repositioned and installed on an electrolytic machine tool to be machined, the working efficiency is low, the manufacturing period is long, and errors are caused by repeated positioning, so that the machining precision of the blisk is influenced.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the defects in the prior art, the invention provides an integral impeller electrolytic jacking and forming processing device.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides an electrolysis trepanning of whole impeller and shaping processingequipment, includes lathe bed and crossbeam, be equipped with the frock platform along lathe bed length direction round trip movement on the lathe bed, frock platform central point puts and is equipped with the C axle, C epaxial level is equipped with the revolving axle that is used for fixed bladed disk, the crossbeam is located the lathe bed top, the vertical main shaft that is equipped with on the crossbeam, be equipped with on the main shaft and be used for processing out the trepanning negative pole processing subassembly of blade rudiment on the bladed disk and be used for the blade electrolysis subassembly to the fine processing of blade rudiment.

The blade disc workpiece is arranged on the rotating shaft and is in a vertical state, the workpiece is connected with the positive electrode of a power supply, and the tool table slides back and forth along the Y axis to enable the blade disc to be positioned at a correct position below the main shaft; the main shaft is used for driving the jacking cathode processing assembly or the blade electrolysis assembly to be close to or far away from the blade disc in the vertical direction; the jacking cathode machining assembly is used for machining blade rudiments on the blade disc, and the blade electrolysis assembly is used for finish machining of the blade rudiments.

Further, jacking negative pole processing subassembly includes first negative pole, installation chuck and fixing base, be equipped with on the installation chuck and lead electrical pillar and two at least water injection nozzles that connect, first negative pole is located installation chuck below, first negative pole both ends through two connecting rods with installation chuck fixed connection, be equipped with on the first negative pole with blade cross-section complex processing sword, be equipped with on first negative pole, support and the installation chuck with connect the water injection nozzle and process the first inlet channel of sword intercommunication, be equipped with the drive on the fixing base installation chuck is along axis pivoted rotary device, be equipped with the drive on the fixing base installation chuck is close to or keeps away from the first drive arrangement of bladed disk along vertical direction.

The width of the first cathode machining edge is determined by the width of the minimum passage of the blade disc and the value of the electrochemical machining gap, the shape of the first cathode machining edge is determined by the structural shapes of the blade disc and the blade back of the blade, and the through hole in the middle of the first cathode is the shape of the minimum ruled envelope of the machined blade. The blades are twisted, when the first cathode is machined downwards, the rotating device controls the first cathode to rotate along with the twist angle of the blades, so that a large amount of material in the impeller channel is removed, the geometric shape of the material left in the middle is a prototype of the blades, further fine machining is needed, and the allowance to be machined is small.

The bracket is used for connecting the first cathode and the mounting chuck, the mounting chuck is provided with a conductive column for connecting the power supply cathode, and the first cathode, the bracket and the mounting chuck are all made of conductive materials; the water receiving nozzle is matched with the first liquid inlet channel and used for spraying electrolyte from the first cathode machining blade to perform electrolytic machining on the blade disc.

Further, in order to drive the first cathode to rotate for processing, the rotating device comprises a motor and a speed reducer, the motor is arranged on the fixed seat, the output end of the motor is in transmission connection with the input end of the speed reducer, and the output end of the speed reducer is fixedly connected with the mounting chuck.

After the rotating speed of the motor is reduced through the speed reducer, the motor can drive the mounting chuck mounted on the output shaft of the speed reducer to rotate, and therefore the first cathode on the mounting chuck is driven to rotate.

Further, in order to drive the first cathode to process downwards, the first driving device comprises a V shaft and a first sliding table, the fixed seat is fixedly connected with the first sliding table, the first sliding table is arranged on one side of the V shaft, a motor and a lead screw which are used for driving the first sliding table to slide vertically are arranged in the V shaft, and the V shaft is fixedly connected with the main shaft.

The main shaft is used for driving the V shaft to descend rapidly so as to drive the first cathode to approach the leaf disc rapidly; the first sliding table is used for driving the first cathode to slowly descend during machining, and blade rudiments are machined on the blade disc. The lead screw is in threaded connection with the first sliding block, and the first sliding table is driven to ascend or descend on the V shaft through forward rotation or reverse rotation of the motor.

Further, in order to finish the blade rudiment, the blade electrolysis component comprises a bracket, a second cathode matched with the blade back of the blade and a third cathode matched with the blade basin of the blade, the upper end of the second cathode is provided with a second sliding block, the lower end of the second cathode is provided with a cutting edge matched with the blade back of the blade, the upper end of the third cathode is provided with a third slide block, the lower end of the third cathode is provided with a cutting edge matched with the blade basin, the second slide block and the third slide block are both provided with a conductive column and a water receiving nozzle, the second cathode and the second slide block are provided with a second liquid inlet channel communicated with the water receiving nozzle and the cutting edge, a third liquid inlet channel communicated with the water receiving nozzle and the cutting edge is arranged on the third cathode and the third slide block, the second sliding block and the third sliding block are both connected with the support in a sliding mode along the horizontal direction, and a lead screw and a motor are arranged on the second sliding block and the third sliding block and drive the second sliding block and the third sliding block to slide back and forth along the horizontal direction.

The water receiving nozzle is connected with the electrolyte supply device to supply electrolyte to the second cathode and the third cathode cutting edge, the second sliding block and the third sliding block are both made of conductive materials and are connected with the negative electrode of the power supply through the conductive column, and an electric loop is formed between the water receiving nozzle and the workpiece during electrolytic machining to carry out electrolytic machining;

the second sliding block and the third sliding block respectively slide back and forth on the bracket along the horizontal direction under the drive of respective motor lead screws, so that the second cathode is close to or far away from the blade back of the blade, and the third cathode is close to or far away from the blade basin; motors on the second sliding block and the third sliding block can control the second cathode and the third cathode to move in the opposite direction or in the opposite direction at the same speed at the same time, and the blade back and the blade basin are subjected to electrolytic machining, so that the electrolytic machining quality of the blades is ensured; further, the tool table is made of non-conductive materials such as marble and the like, and the flatness is high and the structural strength is high.

The invention has the beneficial effects that: the electrolytic nesting and forming device for the integral impeller has the advantages that after a blank of the blade disc is clamped once, rough machining and fine machining of the blade can be completed without repositioning and installing, repeated positioning errors are reduced, machining precision of the blade disc is improved, and a manufacturing period is shortened.

Drawings

The invention is further illustrated by the following figures and examples.

FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;

FIG. 2 is an enlarged schematic view of A of FIG. 1;

FIG. 3 is a schematic structural view of a trepanning cathode machining assembly;

FIG. 4 is a schematic structural view of the rough machining of a blisk according to the preferred embodiment of the present invention;

FIG. 5 is an enlarged schematic view of B in FIG. 4;

FIG. 6 is a schematic structural view of a preferred embodiment blade finishing of the present invention;

FIG. 7 is an enlarged schematic view of C of FIG. 6;

fig. 8 is a schematic view of a molding structure of a blisk.

In the figure: 1. the fixture comprises a fixture table, 2, a cross beam, 3, C shafts, 4, a main shaft, 5, a blade disc, 5-1, blades, 6, a first cathode, 6-1, a processing blade, 7, an installation chuck, 8, a fixing seat, 9, a conductive column, 10, a water receiving nozzle, 11, a connecting rod, 12, a motor, 13, V shafts, 14, a first sliding table, 15, a lead screw, 16, a support, 17, a second cathode, 18, a third cathode, 19, a second sliding block, 20 and a third sliding block.

Detailed Description

The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and merely illustrates the basic structure of the present invention in a schematic manner, and therefore it shows only the constitution related to the present invention.

As shown in fig. 1-8, the device for electrolytic nesting and forming machining of the integral impeller comprises a lathe bed and a cross beam 2, wherein a tool table 1 moving back and forth along the length direction of the lathe bed is arranged on the lathe bed, and the tool table 1 is made of marble.

The center of the tooling table 1 is provided with a C shaft 3, a rotating shaft for fixing the blade disc 5 is horizontally arranged on the C shaft 3, the cross beam 2 is arranged above the lathe bed, a main shaft 4 is vertically arranged on the cross beam 2, and the main shaft 4 is provided with a nesting cathode processing assembly for processing a prototype 5-1 of the blade on the blade disc 5 and a blade electrolysis assembly for finely processing the prototype 5-1 of the blade.

The trepanning cathode processing assembly comprises a first cathode 6, an installation chuck 7 and a fixed seat 8, wherein the installation chuck 7 is provided with a conductive column 9 and at least two water receiving nozzles 10, the first cathode 6 is arranged below the mounting chuck 7, two ends of the first cathode 6 are fixedly connected with the mounting chuck 7 through two connecting rods 11, a processing blade matched with the section of the blade 5-1 is arranged on the first cathode 6, a first liquid inlet channel communicated with the water receiving nozzle 10 and the processing blade is arranged on the first cathode 6, the bracket 16 and the mounting chuck 7, the fixed seat 8 is provided with a rotating device which drives the mounting chuck 7 to rotate along the axis, the rotating device comprises a motor 12 and a speed reducer, the motor 12 is arranged on the fixed seat 8, the output end of the motor 12 is in transmission connection with the input end of the speed reducer, and the output end of the speed reducer is fixedly connected with the mounting chuck 7.

Be equipped with the drive on the fixing base 8 installation chuck 7 is close to or keeps away from the first drive arrangement of bladed disk 5 along vertical direction, first drive arrangement includes V axle 13 and first slip table 14, fixing base 8 with 14 fixed connection of first slip table, first slip table 14 is located V axle 13 one side, be equipped with in the V axle 13 and be used for the drive first slip table 14 is along gliding motor 12 and lead screw 15 from top to bottom of vertical direction, V axle 13 with 4 fixed connection of main shaft.

The blade electrolysis component comprises a support 16, a second cathode 17 matched with a blade 5-1 blade back and a third cathode 18 matched with a blade 5-1 blade basin, a second slider 19 is arranged at the upper end of the second cathode 17, a blade matched with the blade 5-1 blade back is arranged at the lower end of the second cathode 17, a third slider 20 is arranged at the upper end of the third cathode 18, a blade matched with the blade 5-1 blade basin is arranged at the lower end of the third cathode 18, a conductive column 9 and a water receiving nozzle 10 are arranged on the second slider 19 and the third slider 20, a second liquid inlet channel communicated with the water receiving nozzle 10 and the blade is arranged on the second cathode 17 and the second slider 19, a third liquid inlet channel communicated with the water receiving nozzle 10 and the blade is arranged on the third cathode 18 and the third slider 20, and the second slider 19 and the third slider 20 are both connected with the support 16 in a sliding manner along the horizontal direction, the second sliding block 19 and the third sliding block 20 are respectively provided with a lead screw and a motor 12 to drive the second sliding block 19 and the third sliding block 20 to slide back and forth along the horizontal direction.

The working process is as follows:

the machine tool firstly performs rough machining on the impeller channel and removes large allowance of the channel, so that the minimum straight-line enveloping surface of the blade 5-1 is machined by trepanning. For further finish machining, the shape of the blade 5-1 is machined in place, and then the blade 5-1 is subjected to the electrolytic forming process of bidirectional feeding.

B, trepanning processing: after the blank of the leaf disc 5 is arranged on the rotating shaft, the blank is adjusted to be in a vertical state, the main shaft 4 moves up and down, the second cathode 17 and the third cathode 18 are adjusted to be in safe heights, and the second sliding table and the third sliding table move to two ends to make room for the movement of the first cathode 6. The V-shaft 13 drives the first sliding table 14 to drive the first cathode 6 and the rotating device thereof to move downwards to a certain safety value above the blank of the blisk 5, the electrolyte is opened, the electrolyte flows through the inside of the bracket 16 from the water receiving nozzle 10 on the mounting chuck 7 and is sprayed out to the machining gap from the water outlet of the machining edge of the first cathode 6 at a certain speed and pressure, the conductive column 9 on the mounting chuck 7 is connected with the negative pole of a power supply, the blank of the blisk 5 is connected with the positive pole of the power supply, the V-shaft 13 continuously drives the first cathode 6 to feed the blank of the blisk 5, and when the gap between the two is small, blank materials are removed by electrolytic machining. The first cathode 6 is driven by the driving motor 12 to rotate along with the twist angle of the blade 5-1 while feeding downwards until the enveloping ruled surface of the blade 5-1 is processed. At this time, the shape of the channel is formed, so that the forming electrolytic machining of the blade 5-1 is facilitated.

And (3) forming and electrolytic machining of the blade 5-1: the V shaft 13 drives the first cathode 6 to move up to a safe height, and the main shaft 4 drives the second cathode 17 and the third cathode 18 to move to the upper part of the blisk 5; a second cathode 17 and a third cathode 18 are respectively clamped on the second sliding table and the third sliding table and connected with a negative electrode of a processing power supply, the main shaft 4 drives the cathodes to enter an interlobe channel obtained by processing in the previous working procedure, electrolyte flows into the second cathode 17 and the third cathode 18 from water inlets on the second sliding table and the third sliding table and is sprayed out from outlets of the second cathode 17 and the third cathode 18 into a processing gap (the processing gap is a gap between the cathode and a workpiece anode, electrolytic processing is non-contact processing), the processing power supply is opened, a certain voltage (generally 14-24V and pulse current) is applied, the motor 12 controls the second sliding table and the third sliding table to move oppositely, namely the second cathode 17 and the third cathode 18 are simultaneously fed to the blade 5-1, materials on two sides of the blade 5-1 are gradually removed by electrolytic processing under the action of an electric field and a flow field, and the shapes of the second cathode 17 and the third cathode 18 are gradually copied, thereby shaping the blade 5-1 into place. After the machining is finished, the power supply and the electrolyte are turned off, the motor 12 drives the second cathode 17 and the third cathode 18 to retreat to certain safe positions, and the spindle 4 moves upwards to return to the initial position state.

In the forming electrolytic machining process of the blade 5-1, the machining system monitors machining current, when the current is suddenly increased (before short circuit is about to occur), the motor 12 controls the second sliding table and the third sliding table to stop advancing and retreat by a safety value, and when the current is reduced to a normal value, machining is continued, so that the short circuit condition can be effectively controlled, burning of a cathode is reduced, and machining precision is improved.

Directions and references (e.g., up, down, left, right, etc.) may be used in the present disclosure only to aid in the description of features in the figures. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.

In light of the foregoing description of preferred embodiments in accordance with the invention, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides an electrolysis trepanning of whole impeller and shaping processingequipment which characterized in that: the device comprises a lathe bed and a cross beam (2), wherein a tool table (1) moving back and forth along the length direction of the lathe bed is arranged on the lathe bed, a C shaft (3) is arranged at the center of the tool table (1), a rotating shaft used for fixing a blade disc (5) is horizontally arranged on the C shaft (3), the cross beam (2) is arranged above the lathe bed, a main shaft (4) is vertically arranged on the cross beam (2), and a nesting cathode machining assembly used for machining a rudiment of the blade (5-1) on the blade disc (5) and an electrolytic assembly used for finely machining the rudiment of the blade (5-1) are arranged on the main shaft (4).

2. The integrated impeller electrolytic nesting and forming processing device according to claim 1, wherein: the trepanning cathode processing assembly comprises a first cathode (6), an installation chuck (7) and a fixed seat (8), the mounting chuck (7) is provided with a conductive column (9) and at least two water receiving nozzles (10), the first cathode (6) is arranged below the mounting chuck (7), two ends of the first cathode (6) are fixedly connected with the mounting chuck (7) through two connecting rods (11), the first cathode (6) is provided with a processing blade matched with the section of the blade (5-1), a first liquid inlet channel communicated with the water receiving nozzle (10) and the processing blade is arranged on the first cathode (6), the bracket (16) and the mounting chuck (7), the fixed seat (8) is provided with a rotating device which drives the mounting chuck (7) to rotate along the axis, and a first driving device for driving the mounting chuck (7) to be close to or far away from the blade disc (5) along the vertical direction is arranged on the fixing seat (8).

3. The integrated impeller electrolytic nesting and forming processing device according to claim 2, wherein: the rotating device comprises a motor (12) and a speed reducer, the motor (12) is arranged on the fixing seat (8), the output end of the motor (12) is in transmission connection with the input end of the speed reducer, and the output end of the speed reducer is fixedly connected with the mounting chuck (7).

4. The integrated impeller electrolytic nesting and forming apparatus as claimed in claim 3, wherein: first drive arrangement includes V axle (13) and first slip table (14), fixing base (8) with first slip table (14) fixed connection, first slip table (14) are located V axle (13) one side, be equipped with in V axle (13) and be used for the drive first slip table (14) are along gliding motor (12) and lead screw (15) from top to bottom of vertical direction, V axle (13) with main shaft (4) fixed connection.

5. The integrated impeller electrolytic nesting and forming processing device according to claim 1, wherein: the blade electrolysis component comprises a support (16), a second cathode (17) matched with the blade back of the blade (5-1) and a third cathode (18) matched with the blade basin of the blade (5-1), a second sliding block (19) is arranged at the upper end of the second cathode (17), a blade edge matched with the blade back of the blade (5-1) is arranged at the lower end of the second cathode (17), a third sliding block (20) is arranged at the upper end of the third cathode (18), a blade edge matched with the blade basin of the blade (5-1) is arranged at the lower end of the third cathode (18), a conductive column (9) and a water receiving nozzle (10) are arranged on the second sliding block (19) and the third sliding block (20), a second liquid inlet channel communicated with the water nozzle (10) and the blade edge is arranged on the second cathode (17) and the second sliding block (19), and a third liquid inlet channel communicated with the water nozzle (10) and the blade edge is arranged on the third cathode (18) and the third sliding block (20), the second sliding block (19) and the third sliding block (20) are both connected with the support (16) in a sliding mode along the horizontal direction, and a lead screw and a motor (12) are arranged on the second sliding block (19) and the third sliding block (20) and drive the second sliding block (19) and the third sliding block (20) to slide back and forth along the horizontal direction.

6. The integrated impeller electrolytic nesting and forming processing device according to claim 1, wherein: the tool table (1) is made of non-conductive materials such as marble and the like, and is high in flatness and structural strength.