CN117127244A - Electrolytic machining device and method for double-stage blade blisk - Google Patents

Abstract

The application discloses an electrolytic machining device and method for a double-stage blade blisk, which relate to the technical field of electrolytic machining and comprise the following steps: the blade basin cathode, the blade back cathode, the first mounting seat, the second mounting seat and the gas blocking assembly; the first mounting seat and the second mounting seat are arranged in a sliding manner relatively; the first mounting seat is provided with a leaf basin cathode, and the second mounting seat is provided with a leaf back cathode; the first gas blocking component is arranged on the outer side of the cathode of the leaf basin in a covering manner and is provided with a first gas flow channel; the second gas blocking component is arranged on the outer side of the blade back cathode in a covering manner and is provided with a second gas flow channel; when the first mounting seat and the second mounting seat move to the set working positions, two forming areas for machining the two-stage blades are formed, so that electrolytic machining of a pair of two-stage blades of the blisk can be realized simultaneously and mutually unaffected; after the pair of two-stage blades are machined, only the blisk is required to be rotated, so that the machining time is shortened, and the machining efficiency is improved.

Description

Electrolytic machining device and method for double-stage blade blisk

Technical Field

The application belongs to the technical field of electrolytic machining, and particularly relates to an electrolytic machining device and method for a double-stage blade blisk.

Background

The double-stage blade blisk is a novel structural member, adopts integral design, integrates double-stage blades with a wheel disc, reduces parts for connection compared with a traditional blisk tenon and mortise connecting structure, eliminates air flow loss at the tenon and mortise connecting position, reduces part weight, greatly improves working efficiency, power-weight ratio and safety reliability of an engine, and is widely applied to novel aeroengines.

The electrolytic machining is a technological method for realizing material machining by utilizing the electrochemical dissolution phenomenon of an anode metal material in electrolyte, has the characteristics of high production efficiency, no loss of a tool cathode in theory, no limitation of mechanical properties such as material hardness, good machining surface quality, no residual stress after machining and the like, and is widely applied to the field of blisk manufacturing.

The double-stage blade blisk is provided with double rows of blades, the blade body is light and thin, the blade profile is twisted, the blade grid channels are twisted and narrow, and the materials are mainly difficult to process materials such as high-temperature alloy, titanium alloy and the like, so that the processing and manufacturing efficiency is low, the period is long, and the cost is high.

The traditional single-stage blisk blade profile finish machining method is to machine and shape a single blade at one time by feeding the blade basin and the blade back cathode in opposite directions. However, aiming at double-row blades of the double-stage blade type blisk, the method has long processing time and low efficiency, and the processed blades are easy to generate stray corrosion, so that the processing quality and the processing precision of the surface of a workpiece are reduced.

Disclosure of Invention

The application aims to overcome the defects in the prior art, and provides an electrolytic machining device and method for a double-stage blade blisk, which can realize simultaneous machining of double-stage blades, improve the machining efficiency and the machining precision of the finish machining of the double-stage blisk, and simultaneously avoid stray corrosion of machined blades.

The application provides the following technical scheme:

in a first aspect, there is provided an electrochemical machining apparatus for a dual stage blade blisk, comprising: the blade basin cathode, the blade back cathode, the first mounting seat, the second mounting seat and the gas blocking assembly;

the first mounting seat and the second mounting seat are arranged in a sliding manner relatively; a group of leaf basin cathodes are arranged on the first mounting seat, a group of leaf back cathodes are arranged on the second mounting seat, and the leaf basin cathodes and the leaf back cathodes are in one-to-one correspondence and cooperate; when the first mounting seat and the second mounting seat move to the set working positions in opposite directions, two forming areas for simultaneously forming the two-stage blade are formed between the characteristic molded surfaces of the cathode of the leaf basin and the cathode of the leaf back;

a first gas blocking component is arranged at the outer side of the cathode of the leaf basin, which is far away from the forming area, in a covering manner, and a first gas flow channel is arranged between the gas blocking component and the cathode of the leaf basin; the second gas blocking component is arranged at the outer side of the back cathode, which is away from the forming area, in a covering manner, and a second gas flow channel is arranged between the gas blocking component and the back cathode.

Preferably, the number of the leaf basin cathode and the number of the leaf back cathode are two, a first liquid blocking and guiding block is arranged on the first mounting seat, and a second liquid blocking and guiding block and a third liquid blocking and guiding block are arranged on the second mounting seat; the second liquid blocking guide block is positioned between the two blade back cathodes; when the first mounting seat and the second mounting seat move to the set working positions, the first liquid blocking guide block and the third liquid blocking guide block are respectively positioned at the outer sides of the two leaf basin cathodes and the outer sides of the two leaf back cathodes, and meanwhile the first liquid blocking guide block is propped against the second mounting seat, and the second liquid blocking guide block and the third liquid blocking guide block are propped against the first mounting seat.

Preferably, the end of each leaf basin cathode far away from the characteristic molded surface is correspondingly provided with a first insulating plate; the end part of each phyllotactic cathode far away from the characteristic molded surface is correspondingly provided with a second insulating plate; the first insulating plate and the second insulating plate are both provided with inclined planes, and the inclined planes are gradually close to the central axis of the forming area in the flowing direction of electrolyte.

Preferably, the spacing between two of said gas shut-off assemblies is less than the spacing between two adjacent vanes at the level of that; the gas blocking assembly comprises a flow dividing seat and a gas flow baffle; the split-flow seat is correspondingly arranged on the first mounting seat or the second mounting seat; the split-flow seat is internally provided with a main channel and two branch channels communicated with the main channel; the airflow baffle is arranged on the flow dividing seat and covers the outer side of the vane back cathode or the vane basin cathode.

Preferably, the first mounting seat and the second mounting seat are respectively provided with an air column communicated with the main channel, and the air columns are communicated with an air joint communicated with an external air source.

Preferably, the device further comprises an active diversion liquid column, wherein the active diversion liquid column is positioned between the first mounting seat and the second mounting seat, and two liquid outlets are arranged in the active diversion liquid column and are opposite to the two forming areas; the active diversion liquid column is internally provided with a liquid passing joint, a first liquid storage cavity and a second liquid storage cavity; the liquid passing joint is communicated with the first liquid storage cavity and the second liquid storage cavity through Y-shaped forked honeycomb duct; the liquid outlet is positioned in the active diversion liquid column; the two liquid outlets are communicated with the first liquid storage cavity and the second liquid storage cavity in a one-to-one correspondence mode.

Preferably, the liquid outlet is in a diverging horn shape; the big end of the liquid outlet is matched with the forming area, and the small end of the liquid outlet is matched with the first liquid storage cavity and the second liquid storage cavity; the cross section size of the small head end of the liquid outlet is smaller than that of the first liquid storage cavity and the second liquid storage cavity; the midpoint of the connecting line of the central axes of the first liquid storage cavity and the second liquid storage cavity is collinear with the central axis of the liquid passing joint; when the blade to be processed is in the final processing position, the central axis of the first liquid storage cavity is collinear with the stacking axis of one stage of the blade, and the central axis of the second liquid storage cavity is collinear with the stacking axis of the other stage of the blade.

Preferably, the first mounting seat and the second mounting seat are respectively connected with the two first power drives in a one-to-one correspondence manner; under the action of the two first power driving actions, the first mounting seat and the second mounting seat move oppositely or back to back in the horizontal plane.

Preferably, the workpiece positioning and clamping assembly is used for installing and driving the workpiece to be processed to act; the workpiece positioning and clamping assembly comprises a connecting seat, a positioning column, a first end face insulating plate, a second end face insulating plate and a limiting piece; the connecting seat is connected with a second power drive to drive the workpiece to be processed to translate on X, Y and Z axes and rotate on C axis; the positioning column is arranged on the connecting seat; the first end face insulating plate and the second end face insulating plate are abutted against two ends of a workpiece to be processed and coaxially sleeved on the outer side of the positioning column, and the limiting piece is arranged on the outer side of the first end face insulating plate so as to prevent the workpiece to be processed from moving along the positioning column.

In a second aspect, there is provided a method of electrochemical machining of a dual stage blade blisk, using an electrochemical machining apparatus of any one of the first aspects, the method comprising:

s1: the blisk is connected with the positive electrode of the power supply, and the cathode of the blade back and the cathode of the blade basin are connected with the negative electrode of the power supply;

s2: the second power drive is started to drive the workpiece to be processed to move to a working position; pre-filling liquid and ventilation, and checking the tightness of the device; then stopping liquid flowing and carrying out tool setting;

s3: setting electrolytic machining parameters, and introducing electrolyte and high-pressure blocking gas; the first power drive starts, drives the cathode of the leaf basin and the cathode of the leaf back to vibrate and feed on the horizontal plane, the two-stage blades are gradually dissolved under the electrochemical reaction action at the same time until the two-stage blades are processed into a required shape, after the two-stage blades are processed, liquid and air are stopped, the second power drive moves the workpiece out of a processing area, and the next pair of blades are rotated to a processing position by utilizing the automatic indexing assembly driven by the second power;

s4: repeating the step S3 until all blades of the two-stage blade blisk are machined;

s5: and stopping liquid and air flowing after the machining is finished, and taking out the workpiece.

Compared with the prior art, the application has the beneficial effects that:

(1) A group of leaf basin cathodes are arranged on the first mounting seat, a group of leaf back cathodes are arranged on the second mounting seat, when the first mounting seat and the second mounting seat move to a set working position, each leaf basin cathode and each leaf back cathode are in one-to-one correspondence and cooperate with each other to form two forming areas for processing two-stage blades, so that electrolytic processing of a pair of two-stage blades of the blisk can be realized simultaneously without influencing each other; after the processing of a pair of doublestage blade is accomplished, only need rotate the blisk can, avoid the repeated installation of electrolytic machining negative pole to change, reduce process time by a wide margin, improve machining efficiency.

(2) The gas blocking assemblies are arranged on the first mounting seat and the second mounting seat, so that electrolyte flowing to adjacent blades of the processing blade can be blocked in the electrolytic processing process, and insulation protection is provided for the adjacent blades of the processing blade, so that the processing precision is improved.

(3) An active diversion liquid column is arranged between the first mounting seat and the second mounting seat, and is provided with two liquid outlets, so that electrolyte can be provided for the processed two-stage blade; be equipped with first liquid chamber and second liquid chamber that holds in the initiative reposition of redundant personnel night post, when electrolyte flows through the liquid outlet from first liquid chamber that holds, second liquid chamber flows through the liquid outlet, carries out the speed-up to first insulation board and second insulation board also have the inclined plane, thereby make the electrolyte by the speed-up again, the electrolyte high-speed regional that takes shape of flowing through has improved the stability of course of working.

Drawings

FIG. 1 is a schematic structural view of a dual stage bucket blisk of the present application;

FIG. 2 is a schematic view of the overall structure of the present application;

FIG. 3 is a schematic view of the internal structure of the active split flow column of the present application;

FIG. 4 is a schematic cross-sectional view of a diverter seat according to the present application;

fig. 5 is a schematic view of two gas shut-off assembly mounting locations of the present application.

Marked in the figure as: 1 is a workpiece to be processed, 2 is a positioning column, 3 is a connecting seat, 4 is a second end face insulating plate, 5 is a first end face insulating plate, 6 is an airflow baffle, 7 is a blade back cathode, 8 is a second insulating plate, 9 is an inclined plane, 10 is a flow dividing seat, 101 is a main channel, 102 is a branch channel, 11 is a second mounting seat, 12 is a ventilation column, 13 is a first power drive, 15 is a ventilation joint, 16 is a limiting piece, 17 is a first liquid blocking guide block, 18 is a blade basin cathode, 19 is a liquid outlet, 20 is a second liquid blocking guide block, 21 is a third liquid blocking guide block, 22 is a first liquid storage cavity, 23 is a second liquid storage cavity, 24 is a first mounting seat, 25 is an active flow dividing and ventilation column, 26 is a first airflow channel, 27 is a second airflow channel, 28 is a liquid passing joint, and 29 is a first insulating plate.

Detailed Description

The application will now be described in further detail with reference to the accompanying drawings.

It should be noted that the terms like "upper", "lower", "left", "right", "front", "rear", and the like are also used for descriptive purposes only and are not intended to limit the scope of the present application in which the present application may be practiced, but rather the relative relationship may be altered or modified without substantial modification to the technical context; the detachable installation of the application can be direct installation or indirect installation through a connecting piece.

Example 1

As shown in figure 1, the two-stage blade blisk has double rows of blades with equal number, the number of the blades is large, the blade body is light and thin, the blade shape is twisted, and the blade grid channel is twisted narrowly.

As shown in fig. 2, an electrolytic machining device for a double-stage blade blisk includes: the leaf basin cathode 18, the leaf back cathode 7, the first mount 24, the second mount 11 and the gas shut off assembly.

The first mounting seat 24 and the second mounting seat 11 are arranged in a sliding manner, and optionally, the first mounting seat 24 and the second mounting seat 11 are respectively connected with the two first power drives 13; the first and second mounting blocks 24, 11 are moved in a horizontal plane towards or away from each other by the two first power drives 13, the first power drive 13 being an HSK chuck of an alternative machine tool.

A group of leaf basin cathodes 18 are mounted on the first mounting seat 24, a group of leaf back cathodes 7 are mounted on the second mounting seat 11, the leaf basin cathodes 18 and the leaf back cathodes 7 are in one-to-one correspondence and cooperate, specifically, two leaf basin cathodes 18 and two leaf back cathodes 7 are arranged, namely, one leaf basin cathode 18 and one leaf back cathode 7 cooperate to process one grade of blades, and the other leaf basin cathode 18 and the leaf back cathode 7 cooperate to process the other grade of blades; the two leaf basin cathodes 18 and the two leaf back cathodes 7 act together to be capable of processing a pair of leaves of two levels simultaneously; the end of the characteristic profile of the cathode 18 of the leaf basin extends out of the first mounting seat 24, and the end of the characteristic profile of the cathode 7 of the leaf back extends out of the second mounting seat 11; when the first mounting seat 24 and the second mounting seat 11 are moved to the set working positions in opposite directions, a forming area for forming the blade is formed between the characteristic profiles of the cathode 18 of the leaf basin and the cathode 7 of the leaf back; the forming area has two, for processing a pair of two-level blades simultaneously and independently, and the blade back cathode 7 and the blade basin cathode 18 can be installed in a detachable mode or in a non-detachable mode.

As shown in fig. 5, a first of said gas shut-off assemblies is mounted over the outside of the tub cathode 18 facing away from the forming area, and the gas shut-off assembly forms a first gas flow channel 26 with the tub cathode 18; a second of said gas shut-off members is mounted in covering relation to the outer side of the back cathode 7 facing away from the forming zone, and a second gas flow channel 27 is formed between the gas shut-off member and the back cathode 7; in the electrolytic machining process, high-pressure blocking gas is introduced into the first air flow channel 26 and the second air flow channel 27, so that insulation protection can be provided for adjacent blades to be machined, and the overall machining precision is improved.

In particular, as shown in fig. 2, 4 and 5, the gas shut-off assembly comprises a diverter seat 10 and a gas flow baffle 6; the split-flow seat 10 is correspondingly arranged on the first mounting seat 24 or the second mounting seat 11; the split-flow seat 10 is internally provided with a main channel 101 and two branch channels 102 communicated with the main channel 101; the airflow baffle 6 is arranged on the flow dividing seat 10 and covers the outer side of the vane back cathode 7 or the vane basin cathode 18; the interval between the two gas blocking assemblies is smaller than the interval between two adjacent blades at the level, namely, two gas flow baffles 6 can be inserted between the two adjacent blades; the first mounting seat 24 and the second mounting seat 11 are respectively provided with a ventilation column 12 communicated with the main channel 101, the ventilation columns 12 are communicated with a ventilation joint 15 communicated with an external air source, and the two ventilation columns 12 are respectively arranged on the first mounting seat 24 or the second mounting seat 11.

As shown in fig. 2 and 3, the first mounting seat 24 is provided with a first liquid blocking and guiding block 17, and the second mounting seat 11 is provided with a second liquid blocking and guiding block 20 and a third liquid blocking and guiding block 21; the second liquid blocking guide block 20 is positioned between the two vane back cathodes 7; the third liquid blocking guide block 21 is positioned at the outer side of one of the blade back cathodes 7, and the first liquid blocking guide block 17 is positioned at the outer side of one of the blade basin cathodes 18; the first liquid blocking guide block 17, the second liquid blocking guide block 20 and the third liquid blocking guide block 21 are detachably connected, or are fixedly arranged on the first mounting seat 24 or the second mounting seat 11 before processing; when the first mounting seat 24 and the second mounting seat 11 move to the set working positions, the first liquid blocking guide block 17 and the third liquid blocking guide block 21 are respectively located at the outer sides of the two blade basin cathodes 18 and the outer sides of the two blade back cathodes 7, meanwhile, the first liquid blocking guide block 17 abuts against the second mounting seat 11, the second liquid blocking guide block 20 and the third liquid blocking guide block 21 abut against the first mounting seat 24, namely, when the first mounting seat 24 and the second mounting seat 11 reach the set working positions, the first liquid blocking guide block 17, the third liquid blocking guide block 21, the blade basin cathodes 18, the blade back cathodes 7 and the active split flow liquid column 25 enclose a groove shape with an opening facing the workpiece 1 to be processed, the second liquid blocking guide block 20 is clamped in the formed groove shape and divides the groove into two mutually independent spaces so as to adapt to independent machining of a pair of blades, and therefore, the machining efficiency and the machining precision of the two-stage blades are improved.

As shown in fig. 2, 3 and 5, in particular, the end of each of the leaf basin cathodes 18 remote from the characteristic profile is correspondingly provided with a first insulating plate 29; the end part of each phyllosphere cathode 7 far away from the characteristic molded surface is correspondingly provided with a second insulating plate 8; the first insulating plates 29 are matched with the cathode 18 of the leaf basin, the second insulating plates 8 are matched with the cathode 7 of the leaf back, namely if the shape and the size of the two-stage blades are consistent, the first insulating plates 29 correspondingly installed on each cathode 18 of the leaf basin are consistent with each other, and the second insulating plates 8 correspondingly installed on each cathode 7 of the leaf back are consistent with each other; if the shapes and the sizes of the two-stage blades are not consistent, the sizes of the first insulating plates 29 correspondingly installed on each blade basin cathode 18 are not consistent, and the sizes of the second insulating plates 8 correspondingly installed on each blade back cathode 7 are also not consistent; the first insulating plate 29 and the second insulating plate 8 each have an inclined surface 9, and the inclined surfaces 9 gradually approach the central axis of the forming region in the inflow direction of the electrolyte; the arrangement of the inclined plane 9 can improve the circulation speed of the electrolyte, so that the processing process is more stable.

In some other embodiments, as shown in fig. 2 and 3, the electrolytic processing device further comprises an active split flow column 25; the active diversion liquid column 25 is located between the first mounting seat 24 and the second mounting seat 11, specifically, the active diversion liquid column 25 is mounted on the first mounting seat 24 or the second mounting seat 11, and the active diversion liquid column 25 and the workpiece 1 to be processed are respectively located at two opposite sides of the forming area; the active diversion liquid column 25 is provided with two liquid outlets 19 and is opposite to two forming areas formed by the two groups of leaf basin cathodes 18 and the leaf back cathode 7, and the two active diversion liquid columns 25 can simultaneously provide electrolyte for the two forming areas.

Specifically, a liquid passing joint 28, a first liquid storage cavity 22 and a second liquid storage cavity 23 are arranged in the active diversion liquid column 25; the liquid passing connector 28 is communicated with the first liquid storage cavity 22 and the second liquid storage cavity 23 through Y-shaped forked honeycomb duct, and the liquid passing connector 28 is detachably inserted into the Y-shaped forked honeycomb duct; the liquid outlet 19 is positioned in the active diversion liquid column 25; the two liquid outlets 19 are communicated with the first liquid storage cavity 22 and the second liquid storage cavity 23 in a one-to-one correspondence manner; the liquid outlet 19 is in a gradually-expanding horn shape; the big end of the liquid outlet 19 is matched with the forming area, and the small end is matched with the first liquid storage cavity 22 and the second liquid storage cavity 23 so as to ensure that two blades can be processed without mutual influence; the cross-sectional dimension of the small head end of the liquid outlet 19 is smaller than the cross-sectional dimension of the first liquid storage cavity 22 and the second liquid storage cavity 23, namely the flow velocity of the electrolyte in the first liquid storage cavity 22 and the second liquid storage cavity 23 is increased once when the electrolyte flows out of the first liquid storage cavity 22 and the second liquid storage cavity 23; the midpoint of the connecting line between the central axes of the first liquid storage cavity 22 and the second liquid storage cavity 23 is collinear with the central axis of the liquid passing joint 28; when the blade to be processed is in the final processing position, the central axis of the first liquid storage cavity 22 is collinear with the stacking axis of one stage of blade, and the central axis of the second liquid storage cavity 23 is collinear with the stacking axis of the other stage of blade, so that the smoothness of the flow of electrolyte is ensured.

Example 2

As shown in fig. 2, there is provided an electrolytic machining device for a double-stage blade blisk, embodiment 2 differs from embodiment 1 in that it further includes a workpiece positioning and clamping assembly for mounting and actuating the workpiece 1 to be machined; the workpiece positioning and clamping assembly comprises a connecting seat 3, a positioning column 2, a first end face insulating plate 5, a second end face insulating plate 4 and a limiting piece 16; the connecting seat 3 is connected with a second power drive to drive the workpiece 1 to be processed to translate on X, Y and Z axes and rotate on C axis, and the second power drive can be a power component of a machine tool and can be set by referring to the prior art; the positioning column 2 is arranged on the connecting seat 3, and the connecting seat 3 is connected with a second power drive (not shown in the figure); the first end face insulating plate 5 and the second end face insulating plate 4 are abutted against two ends of the workpiece 1 to be processed and coaxially sleeved on the outer side of the positioning column 2, the limiting piece 16 is arranged on the outer side of the first end face insulating plate 5 so as to prevent the workpiece 1 to be processed from moving along the positioning column 2, and the limiting piece 16 can be a clamping seat; the first end face insulating plate 5 and the second end face insulating plate 4 are used for protecting a non-processing area of the end face of the double-stage blade blisk, and insulating layers are coated on the middle hubs of the first stage blade and the second stage blade of the whole She Pandi, so that stray corrosion phenomenon of the non-processing area is further avoided.

When in installation, the method comprises the following steps:

d1: a group of leaf basin cathodes 18 and a first liquid baffle guide block 17 are installed on a first installation seat 24 in a clamping manner, and a first insulating plate 29 is correspondingly installed on the leaf basin cathodes 18; the first mounting seat 24 is connected with one of the first power drives 13, the active diversion liquid column 25 is fixedly mounted on the first mounting seat 24, and the liquid passing joint 28 is mounted on the active diversion liquid column 25;

d2: clamping and mounting a group of blade back cathodes 7, a second liquid blocking guide block 20 and a third liquid blocking guide block 21 on the second mounting seat 11; correspondingly mounting a second insulating plate 8 on the phyllotame cathode 7; connecting the second mounting seat 11 with another first power drive 13;

d3: the two diversion seats 10 are respectively clamped and installed on the first installation seat 24 and the second installation seat 11, the two ventilation columns 12 are correspondingly installed on the first installation seat 24 and the second installation seat 11, and the two airflow baffles 6 are correspondingly installed on the two diversion seats 10; correspondingly mounting the ventilation connectors 15 on the ventilation column 12;

d4: the positioning column 2 is arranged on the connecting seat 3, the second end face insulating plate 4, the blisk to be processed and the first end face insulating plate 5 are sequentially sleeved and arranged on the positioning column 2, and the limiting piece 16 is arranged on the outer side of the first end face insulating plate 5, which is away from the blisk to be processed.

Example 3

Provided is an electrolytic machining method of a double-stage blade blisk, comprising the following steps: using the electrochemical machining apparatus of either embodiment 1 or 2, the method comprises the steps of:

s1: the blisk is connected with the positive electrode of a power supply, and the back cathode 7 and the basin cathode 18 are connected with the negative electrode of the power supply;

s2: the second power drive is started to drive the workpiece 1 to be processed to move to a working position; pre-filling liquid and ventilation, and checking the tightness of the device; then stopping liquid flowing, and performing tool setting on the first mounting seat 24 and the second mounting seat 11;

s3: setting electrolytic machining parameters, and introducing electrolyte and high-pressure blocking gas; the first power drive 13 is started to drive the cathode 18 of the leaf basin and the cathode 7 of the leaf back to vibrate and feed on the horizontal plane, the two-stage blades are gradually dissolved under the action of electrochemical reaction until the two-stage blades are processed into a required shape, after the two-stage blades are processed, liquid and air are stopped, the second power drive moves the workpiece out of a processing area, and the next pair of blades are rotated to a processing position by utilizing the second power drive automatic indexing assembly;

s4: repeating the step S3 until all blades of the two-stage blade blisk are machined;

s5: and stopping liquid and air flowing after the machining is finished, and taking out the workpiece.

The above is only a preferred embodiment of the present application, and the protection scope of the present application is not limited to the above examples, and all technical solutions belonging to the concept of the present application belong to the protection scope of the present application. It should be noted that modifications and adaptations to the application without departing from the principles thereof are intended to be within the scope of the application as set forth in the following claims.

Claims (10)

1. An electrolytic machining device for a double-stage blade blisk, comprising: a leaf basin cathode (18), a leaf back cathode (7), a first mounting seat (24), a second mounting seat (11) and a gas blocking assembly;

the first mounting seat (24) and the second mounting seat (11) are arranged in a sliding manner relatively; a group of leaf basin cathodes (18) are arranged on the first mounting seat (24), a group of leaf back cathodes (7) are arranged on the second mounting seat (11), and the leaf basin cathodes (18) and the leaf back cathodes (7) are in one-to-one correspondence and cooperate; when the first mounting seat (24) and the second mounting seat (11) move to set working positions in opposite directions, two forming areas for simultaneously forming the two-stage blade are formed between the characteristic profiles of the leaf basin cathode (18) and the leaf back cathode (7);

a first of said gas shut-off assemblies is mounted in overlying relation to the outer side of the cathode (18) of the cone facing away from the forming zone, and a first gas flow passage (26) is provided between the gas shut-off assembly and the cathode (18) of the cone; the second gas blocking component is arranged at the outer side of the back cathode (7) facing away from the forming area in a covering way, and a second gas flow channel (27) is arranged between the gas blocking component and the back cathode (7).

2. The electrolytic machining device for the double-stage blade blisk according to claim 1, wherein two blade basin cathodes (18) and two blade back cathodes (7) are arranged, a first liquid blocking guide block (17) is arranged on the first mounting seat (24), and a second liquid blocking guide block (20) and a third liquid blocking guide block (21) are arranged on the second mounting seat (11); the second liquid blocking guide block (20) is positioned between the two blade back cathodes (7); when the first mounting seat (24) and the second mounting seat (11) move to the set working positions, the first liquid blocking guide block (17) and the third liquid blocking guide block (21) are respectively positioned at the outer sides of the two leaf basin cathodes (18) and the outer sides of the two leaf back cathodes (7), meanwhile, the first liquid blocking guide block (17) is abutted to the second mounting seat (11), and the second liquid blocking guide block (20) and the third liquid blocking guide block (21) are abutted to the first mounting seat (24).

3. The electrolytic machining device for a double-stage blade blisk according to claim 1, characterized in that the end of each of the tub cathodes (18) remote from the characteristic profile is correspondingly provided with a first insulating plate (29); the end part of each vane back cathode (7) far away from the characteristic molded surface is correspondingly provided with a second insulating plate (8); the first insulating plate (29) and the second insulating plate (8) are respectively provided with an inclined surface (9), and the inclined surfaces (9) gradually approach to the central axis of the forming area in the flowing direction of electrolyte.

4. The dual stage bladed blisk electrochemical machining apparatus of claim 1, wherein the spacing between two of said gas blocking assemblies is less than the spacing between two adjacent blades at the level; the gas blocking assembly comprises a flow dividing seat (10) and a gas flow baffle plate (6); the split-flow seat (10) is correspondingly arranged on the first mounting seat (24) or the second mounting seat (11); a main channel (101) and two branch channels (102) communicated with the main channel (101) are arranged in the shunt seat (10); the airflow baffle (6) is arranged on the flow dividing seat (10) and covers the outer side of the blade back cathode (7) or the blade basin cathode (18).

5. The electrolytic machining device for the double-stage blade blisk according to claim 4, wherein the first mounting seat (24) and the second mounting seat (11) are respectively provided with a ventilation column (12) communicated with the main channel (101), and the ventilation column (12) is communicated with a ventilation joint (15) communicated with an external air source.

6. The electrolytic machining device for the double-stage blade blisk according to claim 1, further comprising an active diversion liquid column (25), wherein the active diversion liquid column (25) is positioned between the first mounting seat (24) and the second mounting seat (11), and two liquid outlets (19) are formed in the active diversion liquid column (25) and are opposite to the two forming areas; a liquid passing joint (28), a first liquid storage cavity (22) and a second liquid storage cavity (23) are arranged in the active diversion liquid column (25); the liquid passing joint (28) is communicated with the first liquid storage cavity (22) and the second liquid storage cavity (23) through Y-shaped branched guide pipes; the liquid outlet (19) is positioned in the active diversion liquid column (25); the two liquid outlets (19) are communicated with the first liquid storage cavity (22) and the second liquid storage cavity (23) in a one-to-one correspondence mode.

7. The electrolytic machining device for a double-stage blade blisk according to claim 6, characterized in that the liquid outlet (19) is in the shape of a diverging horn; the big end of the liquid outlet (19) is matched with the forming area, and the small end of the liquid outlet is matched with the first liquid storage cavity (22) and the second liquid storage cavity (23); the cross-sectional dimension of the small head end of the liquid outlet (19) is smaller than the cross-sectional dimension of the first liquid storage cavity (22) and the second liquid storage cavity (23); the midpoint of the connecting line of the central axes of the first liquid storage cavity (22) and the second liquid storage cavity (23) is collinear with the central axis of the liquid passing joint (28); when the blade to be processed is in the final processing position, the central axis of the first liquid storage cavity (22) is collinear with the stacking axis of one stage of the blade, and the central axis of the second liquid storage cavity (23) is collinear with the stacking axis of the other stage of the blade.

8. The electrolytic machining device for the double-stage blade blisk according to claim 1, wherein the first mounting seat (24) and the second mounting seat (11) are respectively connected with two first power drives (13) in a one-to-one correspondence manner; under the action of the two first power drives (13), the first mounting seat (24) and the second mounting seat (11) move in the horizontal plane in opposite directions or back to back.

9. The electrolytic machining device for the double-stage blade blisk according to claim 1, further comprising a workpiece positioning and clamping assembly for mounting and actuating the workpiece (1) to be machined; the workpiece positioning and clamping assembly comprises a connecting seat (3), a positioning column (2), a first end face insulating plate (5), a second end face insulating plate (4) and a limiting piece (16); the connecting seat (3) is connected with a second power drive to drive the workpiece (1) to be processed to translate on X, Y and Z axes and rotate on C axis; the positioning column (2) is arranged on the connecting seat (3); the first end face insulating plate (5) and the second end face insulating plate (4) are propped against two ends of a workpiece (1) to be processed and coaxially sleeved outside the positioning column (2), and the limiting piece (16) is arranged outside the first end face insulating plate (5) so as to prevent the workpiece (1) to be processed from moving along the positioning column (2).

10. A method of electrochemical machining of a dual stage blade blisk, using an electrochemical machining apparatus of any one of claims 1-9, the method comprising:

s1: the blisk is connected with the positive electrode of a power supply, and the back cathode (7) and the basin cathode (18) are connected with the negative electrode of the power supply;

s2: the second power drive is started to drive the workpiece (1) to be processed to move to a working position; pre-filling liquid and ventilation, and checking the tightness of the device; then stopping liquid flowing and carrying out tool setting;

s3: setting electrolytic machining parameters, and introducing electrolyte and high-pressure blocking gas; the first power drive (13) is started to drive the blade basin cathode (18) and the blade back cathode (7) to feed in a vibrating manner on the horizontal plane, the two-stage blades are gradually dissolved under the action of electrochemical reaction until the two-stage blades are processed into a required shape, after the two-stage blades are processed, liquid and air are stopped, the second power drive moves the workpiece out of a processing area, and the next pair of blades are rotated to a processing position by utilizing the second power drive automatic indexing assembly;

s4: repeating the step S3 until all blades of the two-stage blade blisk are machined;

s5: and stopping liquid and air flowing after the machining is finished, and taking out the workpiece.