CN112296458B

CN112296458B - An integral impeller electrolytic forming processing device

Info

Publication number: CN112296458B
Application number: CN202011266481.2A
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: 2025-01-07
Anticipated expiration: 2040-11-13
Also published as: CN112296458A

Abstract

The present invention provides an integral impeller electrolytic forming processing device, including a bed, a column and a crossbeam, a tooling table that slides back and forth along the Y axis is provided on the bed, a C axis is provided at the center of the workbench, a rotary shaft for fixing a blade disk is provided horizontally on the C axis, a vertically arranged main shaft is provided on the crossbeam, a blade electrolysis assembly is provided at the lower end of the main shaft, the blade electrolysis assembly includes a first cathode, a second cathode and a bidirectional feeding mechanism, a first C-shaped tooling is provided on the first cathode, a second C-shaped tooling is provided on the second cathode, a conductive column and a water pipe joint are provided on the first C-shaped tooling and the second C-shaped tooling, and an electrolyte flow channel is provided between the liquid outlets of the first cathode and the second cathode processing surfaces and the water pipe joint. The present invention adopts a bidirectional screw to drive the first cathode and the second cathode to move toward or away from each other at the same speed at the same time to process the blades, thereby ensuring the processing quality of the blades, the product processing precision is high, the equipment manufacturing cost is greatly reduced, and it is conducive to the occurrence of domestic electrolytic processing.

Description

Integral impeller electrolytic forming processing device

Technical Field

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

Background

Electrolytic machining is a method for machining and forming a workpiece in a predetermined size and shape using a tool cathode based on the electrochemical anodic dissolution principle. In the machining process, the workpiece is connected with the positive electrode of the power supply, and the cathode of the tool is connected with the negative electrode of the power supply. A certain interelectrode gap is maintained between the workpiece anode and the tool cathode, and electrolyte flowing at a high speed is introduced into the interelectrode gap to form a conductive path between the workpiece and the cathode. As the cathode is fed to the workpiece, the workpiece material is continuously dissolved and eroded, the electrolytic product is carried away by the high-speed flowing electrolyte, and when the cathode is fed to a preset position, the processing is completed. Compared with the traditional processing technology, the electrolytic processing has the advantages of no cathode loss, wide processing range, high processing surface quality and the like, and therefore, the electrolytic processing is widely applied to processing aeroengine parts such as blisks, diffusers and the like.

In the prior art, electrolytic machining equipment for machining blades of a blisk is provided with two electrolytic cathodes, one for machining blade backs and one for machining blade pots, the two electrolytic cathodes are respectively and independently controlled to machine by two drives, the blade machining precision is biased, the quality of products is affected, and the equipment is mostly introduced from abroad, and is high in price and production cost.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defects in the prior art, and provides an electrolytic forming processing device for an integral impeller.

The invention solves the technical problems by adopting the technical scheme that the integral impeller electrolytic forming processing device comprises a machine tool body, an upright post and a cross beam, wherein a tool table which slides back and forth along a Y axis is arranged on the machine tool body, the cross beam is horizontally arranged above the tool table, the upright post is arranged at two ends of the cross beam, the lower end of the upright post is fixedly connected with the machine tool body, a C axis is arranged at the center position of the tool table, a rotary shaft for fixing a blade disc is horizontally arranged on the C axis, a servo motor is in transmission connection with the rotary shaft, a vertically arranged spindle is arranged on the cross beam, a blade electrolytic assembly is arranged at the lower end of the spindle, a driving device which drives the blade electrolytic assembly to approach or separate from the blade disc in the vertical direction is arranged on the spindle, the blade electrolytic assembly comprises a first cathode which is matched with the blade back of the blade, a second cathode which is matched with the blade basin, and a bidirectional feeding mechanism which controls the first cathode and the second cathode to approach or separate from each other, a motion symmetry center surface of the bidirectional feeding mechanism coincides with the rotary center surface of the rotary shaft, a first cathode is arranged on the first cathode, a C-shaped cathode is connected with a liquid electrolyte flow channel, a second cathode is arranged on the first cathode is connected with a liquid electrolyte flow channel, and a liquid flow channel is arranged on the second cathode, and a liquid flow channel is connected with the first liquid electrolyte is arranged on the tool.

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, 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 first C-shaped tool and the second C-shaped tool are used for arranging electrolyte flow channels to be connected with a liquid inlet device to supply electrolyte for electrolytic machining, the lower ends of the first C-shaped tool and the second C-shaped tool are respectively connected with the first cathode and the second cathode when the electrolytic machining is performed, the first C-shaped tool and the second C-shaped tool are respectively connected with the first cathode and the second cathode, the first C-shaped tool and the second C-shaped tool are driven by the bidirectional feeding mechanism to control the first cathode and the second cathode to move oppositely or reversely at the same speed to perform electrolytic machining on blade backs and blade pots, electrolytic machining quality is guaranteed, and the main shaft is used for driving the first cathode and the second cathode to descend.

Further, in order to control first negative pole and second negative pole and be close to each other or keep away from, guarantee blade processingquality, bidirectional feed mechanism includes support, first slip table and second slip table, be equipped with the spout along the horizontal direction in the support, first slip table and second slip table all with spout sliding connection, the level is equipped with bidirectional screw in the spout, bidirectional screw passes first slip table and second slip table with first slip table and second slip table threaded connection, bidirectional screw rotates and drives first slip table and second slip table and be close to each other or keep away from, first C shape frock and first slip table fixed connection, second C shape frock and second slip table fixed connection. The first sliding table and the second sliding table are driven to be close to or far away from each other on the support through the rotation of the bidirectional screw rod, so that the first C-shaped tool and the second C-shaped tool are driven to be close to or far away from each other, and the first cathode and the second cathode are driven to be close to or far away from each other.

Further, a flow field protective cover is arranged on the tooling table and arranged on the outer side of the C shaft, and a processing groove matched with the blade is formed in the upper end of the flow field protective cover. The flow field protective cover is used for ensuring that electrolyte is not directly discharged from two sides in the electrolytic machining process of the blade, plays a certain pressure maintaining role, and enables the electrolyte to flow out from the blade root and the blade tip, so that the stable performance of the machining process can be prevented.

Further, in order to control the first cathode and the second cathode to automatically advance and retreat, a servo motor is connected to the bidirectional screw in a transmission mode.

Further, in order to ensure uniform and stable feeding of the electrolyte, the liquid outlets of the first cathode and the second cathode are of strip-shaped structures arranged along the diagonal line of the processing surface. The shape of the cathode liquid outlet adopts a diagonal strip structure, so that the uniform flow speed in the whole processing gap can be ensured, and no liquid shortage and vortex phenomenon exists.

Further, the tool table is made of non-conductive materials such as marble and the like with high flatness and high structural strength.

The integral impeller electrolytic forming machining device has the beneficial effects that the bidirectional screw is adopted to drive the first cathode and the second cathode to move in opposite directions or opposite directions at the same speed, so that the blades are machined, the machining quality of the blades is ensured, the machining precision of products is high, the manufacturing cost of equipment is greatly reduced, and the domestic electrolytic machining is facilitated.

Drawings

The invention is further described below with reference to the drawings and examples.

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

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

FIG. 3 is an enlarged schematic view of B in FIG. 2;

Fig. 4 is a schematic view of the structure of the preferred embodiment of the present invention plus a flow field shield;

fig. 5 is an enlarged schematic view of C in fig. 4.

In the figure, 1, a tooling table, 2, a cross beam, 3, a C shaft, 4, a blade disc, 4-1, a blade, 5, a main shaft, 6, a first cathode, 7, a second cathode, 8, a first C-shaped tooling, 9, a second C-shaped tooling, 10, a conductive column, 11, a water pipe connector, 12, a liquid outlet, 13, a bracket, 14, a first sliding table, 15, a second sliding table, 16, a bidirectional screw, 17, a flow field protective cover, 17-1 and a processing groove.

Detailed Description

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

As shown in figures 1-5, the integral impeller electrolytic forming processing device comprises a machine tool body, a stand column and a cross beam 2, wherein a tool table 1 sliding back and forth along a Y axis is arranged on the machine tool body, the tool table 1 is made of marble, the cross beam 2 is horizontally arranged above the tool table 1, the stand column is arranged at two ends of the cross beam 2, the lower end of the stand column is fixedly connected with the machine tool body, a C axis 3 is arranged at the center of the work table, a rotary shaft for fixing a leaf disc 4 is horizontally arranged on the C axis 3, a servo motor is connected on the rotary shaft in a transmission manner, a vertically arranged main shaft 5 is arranged on the cross beam 2, a leaf electrolytic assembly is arranged at the lower end of the main shaft 5, a driving device for driving the leaf electrolytic assembly to be close to or far away from the leaf disc 4 in the vertical direction is arranged on the main shaft 5, the blade electrolysis assembly comprises a first cathode 6 matched with the blade 4-1 blade back, a second cathode 7 matched with the blade 4-1 blade basin, and a bidirectional feeding mechanism for controlling the first cathode 6 and the second cathode 7 to be close to or far away from each other, wherein the motion symmetry center plane of the bidirectional feeding mechanism coincides with the rotation center plane of the rotating shaft, a first C-shaped tool 8 is arranged on the first cathode 6, a second C-shaped tool 9 is arranged on the second cathode 7, a conductive column 10 connected with a power supply and a water pipe joint 11 connected with electrolyte are arranged on the first C-shaped tool 8 and the second C-shaped tool 9, an electrolyte flow channel is arranged between a processing surface liquid outlet 12 of the first cathode 6 and the second cathode 7 and the water pipe joint 11, and the liquid outlet 12 of the first cathode 6 and the second cathode 7 are of long-strip structures arranged along the diagonal line of the processing surface.

The bidirectional feeding mechanism comprises a support 13, a first sliding table 14 and a second sliding table 15, sliding grooves are formed in the support 13 in the horizontal direction, the first sliding table 14 and the second sliding table 15 are both in sliding connection with the sliding grooves, bidirectional screw rods 16 are horizontally arranged in the sliding grooves, the bidirectional screw rods 16 penetrate through the first sliding table 14 and the second sliding table 15 and are in threaded connection with the first sliding table 14 and the second sliding table 15, the bidirectional screw rods 16 rotate to drive the first sliding table 14 and the second sliding table 15 to be close to or far away from each other, a servo motor is connected to the bidirectional screw rods 16 in a transmission mode, the first C-shaped tool 8 is fixedly connected with the first sliding table 14, and the second C-shaped tool 9 is fixedly connected with the second sliding table 15.

The tool table 1 is provided with a flow field protective cover 17, the flow field protective cover 17 is covered on the outer side of the C shaft 3, and the upper end of the flow field protective cover is provided with a processing groove 17-1 matched with the blade 4-1.

The processing method comprises the following steps:

Before the machining method is adopted, the blisk 4 is subjected to grooving rough machining, namely materials in channels between the blades 4-1 are subjected to rough machining, and the machining method is adopted for improving the forming precision and efficiency of the blades 4-1.

When the blisk 4 is clamped on the rotating shaft and is simultaneously connected with the positive electrode of the processing power supply, the first cathode 6 and the second cathode 7 are clamped on the bidirectional feeding mechanism and are connected with the negative electrode of the processing power supply, and the position of the tooling table 1 is adjusted so that the blisk 4 is positioned at the correct position below the main shaft 5.

The main shaft 5 drives the first cathode 6 and the second cathode 7 to be arranged in an inter-blade channel, electrolyte is sprayed into a machining gap from liquid outlets 12 of the first cathode 6 and the second cathode 7, (the machining gap is a gap between the cathode and a workpiece anode, the electrolytic machining is non-contact machining), a machining power supply is turned on, a certain voltage (generally 14-24V and pulse current) is applied, the numerical control system controls the bidirectional feeding mechanism to drive the first C-shaped tool 8 and the second C-shaped tool 9 to move towards each other, namely the first cathode 6 and the second cathode 7 simultaneously feed to the blade 4-1, and under the action of an electric field and a flow field, materials on two sides of the blade 4-1 are gradually removed by the electrolytic machining, and the shapes of the blade basin cathode and the blade back cathode are gradually copied, so that the shape of the blade 4-1 is machined in place. After the machining is finished, the power supply and the electrolyte are turned off, the numerical control system controls the bidirectional feeding mechanism to drive the first cathode 6 and the second cathode 7 to retract to a certain safe position, and the main shaft 5 moves upwards to return to an initial position state.

In the process of forming electrolytic machining of the blade 4-1, the machining system monitors machining current, when the current is suddenly increased (before short circuit occurs), the bidirectional feeding mechanism stops advancing and retreats a safe value, and when the current is reduced to a normal value, machining is continued, so that the occurrence of short circuit can be effectively controlled, the burning of a cathode is reduced, and the machining precision is improved.

Directions and references (e.g., up, down, left, right, etc.) in this invention may be used only to aid in the description of features in the drawings. 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.

While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.

Claims

1. The utility model provides an integral impeller electrolytic molding processingequipment, includes lathe bed, stand and crossbeam (2), be equipped with on the lathe bed along Y axle gliding frock platform (1) that makes a round trip, crossbeam (2) level are located frock platform (1) top, the stand is located crossbeam (2) both ends, stand lower extreme and lathe bed fixed connection, its characterized in that: the center position of the tool table (1) is provided with a C shaft (3), the C shaft (3) is horizontally provided with a rotary shaft for fixing a blade disc (4), the rotary shaft is in transmission connection with a servo motor, the cross beam (2) is provided with a vertically arranged main shaft (5), the lower end of the main shaft (5) is provided with a blade electrolysis assembly, the main shaft (5) is provided with a driving device for driving the blade electrolysis assembly to approach or depart from the blade disc (4) in the vertical direction, the blade electrolysis assembly comprises a first cathode (6) matched with the blade back of the blade (4-1), a second cathode (7) matched with the blade basin of the blade (4-1) and a bidirectional feeding mechanism for controlling the first cathode (6) and the second cathode (7) to approach or depart from each other, the motion symmetry center plane of the bidirectional feeding mechanism coincides with the rotary center plane of the rotary shaft, the first cathode (6) is provided with a first C-shaped tool (8), the second cathode (7) is provided with a second C-shaped tool (9), the first C-shaped tool (8) and the second C-shaped tool (9) are respectively provided with a conductive column (10) connected with a power supply and a water pipe joint (11) connected with electrolyte, and an electrolyte flow channel is arranged between a liquid outlet (12) of a processing surface of the first cathode (6) and the processing surface of the second cathode (7) and the water pipe joint (11);

A flow field protective cover (17) is arranged on the tool table (1), the flow field protective cover (17) is covered on the outer side of the C shaft (3), and a processing groove (17-1) matched with the blade (4-1) is arranged at the upper end of the flow field protective cover (17);

The liquid outlets (12) of the first cathode (6) and the second cathode (7) are of long strip structures arranged along the diagonal line of the processing surface.

2. The integrated impeller electrolytic forming machining device of claim 1, wherein the bidirectional feeding mechanism comprises a support (13), a first sliding table (14) and a second sliding table (15), sliding grooves are formed in the support (13) in the horizontal direction, the first sliding table (14) and the second sliding table (15) are both in sliding connection with the sliding grooves, bidirectional screws (16) are horizontally arranged in the sliding grooves, the bidirectional screws (16) penetrate through the first sliding table (14) and the second sliding table (15) and are in threaded connection with the first sliding table (14) and the second sliding table (15), the bidirectional screws (16) rotate to drive the first sliding table (14) and the second sliding table (15) to be close to or far away from each other, the first C-shaped tool (8) is fixedly connected with the first sliding table (14), and the second C-shaped tool (9) is fixedly connected with the second sliding table (15).

3. An integral impeller electrolytic molding machining device as claimed in claim 2, wherein the bi-directional screw (16) is in driving connection with a servo motor.

4. The electrolytic forming device for the integral impeller of claim 1, wherein the tool table (1) is made of a non-conductive material with high flatness and high structural strength.