A multi-point driving deformation sleeve device for blisk electrochemical machining

Abstract

The application discloses a kind of integral blade disc electrolytic processing multi-point driving deformation sleeve shape devices, it is related to electrolytic processing technical field, including first sliding bundle, second sliding bundle, telescopic component, flexible flow guide sealing sleeve and water inlet pipe, first sliding bundle inside is equipped with sliding slot, blade back elastic working cathode and blade basin elastic working cathode can extend into to sliding slot and with first sliding bundle sliding connection;First sliding bundle and second sliding bundle are mutually far from one end and are fixedly connected with a fixed shaft, a drive device is transmission connection with two fixed shafts;Telescopic component can drive blade back elastic working cathode and blade basin elastic working cathode to the direction of mutual approach or far away movement.The integral blade disc electrolytic processing multi-point driving deformation sleeve shape device provided by the application can realize the controllable deformation of sleeve shape profile, and greatly improve the uniformity of allowance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrolytic processing, in particular to a multi-point driving deformation sleeve device for integral blade disc electrolytic processing. BACKGROUND

[0002] The integral blade disc is a new type of structural part designed to meet the high-performance aero-engine, which integrates the engine rotor blade and the wheel disc, eliminates the tenon, mortise and locking device in the traditional connection, reduces the structural weight and the number of parts, avoids the tenon airflow loss, improves the aerodynamic efficiency, greatly simplifies the engine structure, and has been widely used in military and civil aviation engines in various countries.

[0003] Sleeve electrolytic processing is an important processing method for integral blade discs and has been widely used. The sleeve processing has the characteristics of being able to process only the contour of the equal section, and is better adapted to the equal section integral blade disc. However, the blade profile of many new integral blade discs is designed to be a variable section, and the thickness and chord length of the blade section are changing. The sleeve processing of the equal section will inevitably cause a large processing error, resulting in uneven allowance, which seriously limits the application of sleeve electrolytic processing technology in variable section integral blade discs.

[0004] The slotted processing of the blisk is the first step and an extremely important link of the blade processing, and the processing precision directly affects the final blisk product. In the research on the slotted processing of the blisk, in order to cope with the problems of low processing precision, unevenness of the allowance, low efficiency and the like caused by the increasingly complex structure of the blisk, a processing electrode and a processing method capable of greatly improving the processing efficiency of the slotted processing of the blisk are disclosed in patent CN201410513097.6; a device and a method capable of processing an equal cross-section blade profile by using a pulse dynamic sleeve material electrolytic processing method are disclosed in patent CN201410013249.6; the two patents efficiently process the inlet and outlet edges and improve the processing precision and efficiency of the blisk passage, but both of them are for the processing of the equal cross-section blade passage, and the processing precision is not ideal for the relatively twisted blade passage of the variable cross-section blade. In patent CN201910326896.5, a sleeve material electrolytic processing electrode for deforming the inner cavity by a plurality of connecting rods is disclosed, which realizes the sleeve material electrolytic processing of the large twist blade, but for the variable cross-section blade with different circumferences of the middle cross-section, the method processes the constant circumference, and cannot be flexibly adapted to the blades with different cross-section circumferences. At present, the blisk with the bending and twisting composite blade shape and the large difference in cross-section profile can be processed from the variable cross-section blade and the structure of the processing device. If the elastic processing cathode is adopted, the processing cathode changes with the change of the blade cross-section, the processing precision is significantly improved, and the structure is relatively simple, and the trajectory is relatively easy to optimize and realize. However, the change of the processing cathode arrangement and the device structure will inevitably affect the flow field design of each electrode, thereby leading to the change of the tool clamp, therefore, the variable cross-section sleeve shape electrolytic processing device of the blisk elastic cathode must be reasonably designed to ensure the stability of the processing. SUMMARY

[0005] The purpose of the present application is to provide a multi-point driving deformation sleeve device for electrolytic processing of a blisk, which can realize controllable deformation of the sleeve profile and greatly improve the uniformity of the allowance.

[0006] To achieve the above purpose, the present application provides the following scheme:

[0007] The application provides a multi-point driving deformation sleeve device for integral blade disc electrolytic machining, which comprises a first sliding sleeve, a second sliding sleeve, a telescopic assembly in transmission connection with a blade back elastic working cathode and a blade basin elastic working cathode, a flexible flow guide sealing sleeve and a water inlet pipe in connection with the flexible flow guide sealing sleeve and in communication with the blade back elastic working cathode.

[0008] Preferably, the telescopic assembly comprises two telescopic units arranged symmetrically, each telescopic unit comprises a plurality of telescopic rods, one telescopic unit is in transmission connection with the blade back elastic working cathode, and the other telescopic unit is in transmission connection with the blade basin elastic working cathode.

[0009] Preferably, each telescopic unit comprises three telescopic rods.

[0010] Preferably, the water inlet pipe is provided with a liquid inlet.

[0011] Preferably, the cross-sectional area of the flexible flow guide sealing sleeve is smaller than that of the water inlet pipe.

[0012] Preferably, one end of the water inlet pipe is fixedly connected with a bottom plate, one end of the flexible flow guide sealing sleeve close to the water inlet pipe is provided with a limiting plate, and a fixed body arranged outside the flexible flow guide sealing sleeve can press the limiting plate on the bottom plate.

[0013] The application has the following technical effects relative to the prior art:

[0014] The whole blade electrochemical machining multi-point driving deformation sleeve device provided by the application can adjust the chord length and profile of the elastic working cathode of the blade back and the elastic working cathode of the blade basin to realize variable cross-section sleeve machining of the blade by changing the cross section under the traction movement of the telescopic assembly and the linear movement of the first sliding sleeve and the second sliding sleeve driven by the driving device, greatly reducing the excess difference of sleeve slotting and greatly improving the machining precision. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0016] Figure 1 The structure schematic diagram of the whole blade electrochemical machining multi-point driving deformation sleeve device provided by the application is shown in the figure.

[0017] Figure 2 The structure schematic diagram of the flexible flow guide sealing sleeve and the elastic working cathode assembly provided by the application is shown in the figure.

[0018] Figure 3 The schematic diagram of the movement of the elastic working cathode with the telescopic rod in the variable profile sleeve machining provided by the application is shown in the figure.

[0019] In the figure: 1-fixed shaft; 2-first sliding sleeve; 3-conductive copper plate; 4-elastic working cathode of blade back; 5-telescopic rod; 6-liquid supply port; 7-bottom plate; 8-water inlet pipe; 9-elastic working cathode of blade basin; 10-second sliding sleeve; 11-flexible flow guide sealing sleeve; 12-fixed body. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0021] The purpose of the present application is to provide a whole blade electrochemical machining multi-point driving deformation sleeve device to solve the problems in the prior art, which can realize controllable deformation of the sleeve profile and greatly improve the uniformity of the excess amount.

[0022] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0023] The present application provides a kind of integral blade disc electrolytic processing multi-point driving deformation sleeve device, as shown in Figure 1 As shown, in the present embodiment, including first sliding sleeve 2, second sliding sleeve 10, and elastic working cathode 4 and elastic working cathode 9 of blade back driving connection telescopic assembly of flexible flow guide sealing sleeve 11 and the end of flexible flow guide sealing sleeve 11 away from elastic working cathode 4 is connected and communicated with water inlet pipe 8, first sliding sleeve 2 is internally provided with sliding groove, elastic working cathode 4 and elastic working cathode 9 can be inserted into the sliding groove and be slidably connected with first sliding sleeve 2, strip-shaped hole is opened in first sliding sleeve 2, and a conductive copper plate 3 can pass through strip-shaped hole and be inserted into the sliding groove and be fixedly connected with elastic working cathode 4 and elastic working cathode 9 by screw, and the conductive copper plate 3 can reciprocally slide in strip-shaped hole;Elastic working cathode 4 and elastic working cathode 9 away from the end of first sliding sleeve 2 are fixedly connected with second sliding sleeve 10 by screw, and the end of first sliding sleeve 2 and second sliding sleeve 10 away from each other is fixedly connected with a fixed shaft 1, two fixed shafts 1 are coaxially arranged, a driving device is drivingly connected with two fixed shafts 1, and the driving device can drive two fixed shafts 1 to move along the direction of linearly approaching or moving away from each other;Telescopic assembly can drive elastic working cathode 4 and elastic working cathode 9 to move along the direction of approaching or moving away from each other;Part of the edge of one end of flexible flow guide sealing sleeve 11 is embeddedly installed on elastic working cathode 4, and the other part of the edge is embeddedly installed on elastic working cathode 9, and the processed blade is inserted into flexible flow guide sealing sleeve 11.

[0024] The whole blade electrochemical machining multi-point driving deformation sleeve device provided by the application is composed of a blade back elastic working cathode 4, a blade basin elastic working cathode 9, a flexible flow guide sealing sleeve 11, a first sliding beam sleeve 2, a second sliding beam sleeve 10 and a telescopic assembly. The end surface elastic working cathode is the basis of variable cross-section sleeve machining. The variable cross-section sleeve is realized by changing the chord length and profile of the blade back elastic working cathode 4 and the blade basin elastic working cathode 9. The initial shape of the elastic cathode is determined according to the uppermost controlled line of the blade. The blade back elastic working cathode 4 and the blade basin elastic working cathode 9 are positioned and assembled by the compression of the first sliding beam sleeve 2 and the second sliding beam sleeve 10. The first sliding beam sleeve 2 and the second sliding beam sleeve 10 are driven to slide by the linear motion of the driving device, so as to further adjust the machining length of the blade back elastic working cathode 4 and the blade basin elastic working cathode 9 to realize the adjustment of the machining circumference. The chord length of the blade back elastic working cathode 4 and the blade basin elastic working cathode 9 is adjusted again by the movement of the telescopic rod 5, so that the two elastic cathodes fully exert the flexible and controllable characteristics of the spline curve, thereby realizing more accurate removal of the variable cross-section blade allowance and further realizing variable cross-section sleeve machining. During machining, the blade back elastic working cathode 4 and the blade basin elastic working cathode 9 are pressed by a conductive copper plate 3 and connected to the power supply cathode, the workpiece is connected to the power supply anode, then electrolyte is injected from the water inlet pipe 8 and sprayed out from the middle of the two elastic cathodes, thereby realizing positive impact type electrolytic machining.

[0025] The telescopic assembly includes two telescopic units arranged symmetrically, each telescopic unit includes a plurality of telescopic rods 5, one telescopic unit is in driving connection with the blade back elastic working cathode 4, and the other telescopic unit is in driving connection with the blade basin elastic working cathode 9.

[0026] Each telescopic unit includes three telescopic rods 5, the output end of the telescopic rod 5 is fixedly connected to the blade back elastic working cathode 4 or the blade basin elastic working cathode 9 through a hinge, for traction of the blade back elastic working cathode 4 and the blade basin elastic working cathode 9. Under the action of the telescopic rod 5, the blade back elastic working cathode 4 and the blade basin elastic working cathode 9 can be driven to move, the profile of the blade back elastic working cathode 4 and the blade basin elastic working cathode 9 is changed to realize machining, and the profile deformation is realized, thereby realizing electrolytic removal of the inner cavity surface while ensuring removal of the blade row channel, reducing the machining allowance difference and improving the sleeve machining precision.

[0027] The water inlet pipe 8 is provided with a liquid inlet 6 for introducing electrolyte into the water inlet pipe 8.

[0028] The cross-sectional area of the flexible flow guide sealing sleeve 11 is smaller than the cross-sectional area of the water inlet pipe 8, by reducing the liquid inlet area, the water pressure can be increased, so as to increase the electrolyte flow rate, the flexible flow guide sealing sleeve 11 is used for improving the flow field of the elastic working cathode of the end face, the flexible sealing sleeve can follow the adjustment of the elastic working cathode contour fine adjustment, and the flexible flow guide sealing sleeve 11 maintains the electrolyte flow field unchanged in the end face contour deformation.

[0029] One end of the water inlet pipe 8 is fixedly connected with a bottom plate 7, the opening of the flexible flow guide sealing sleeve 11 close to one end of the water inlet pipe 8 is in a trumpet shape, the trumpet-shaped edge forms a limiting plate, a fixed body 12 arranged outside the flexible flow guide sealing sleeve 11 can press the limiting plate on the bottom plate 7, the fixed body 12 and the bottom plate 7 are connected through screws, and screws can be additionally arranged between the bottom plate 7 and the limiting plate for connection, so as to further improve the stability of the connection.

[0030] The application provides a multi-point driving deformation sleeve device for integral blade disc electrolytic machining, and the use method comprises the following steps:

[0031] Step one: install the workpiece to be machined on the workbench with a linear feed shaft, the workbench can drive the workpiece to move horizontally, and the workpiece is connected with the positive electrode of the power supply;

[0032] Step two: integrally fix the multi-point driving deformation sleeve device for integral blade disc electrolytic machining on the workbench, and connect the conductive copper plate 3 with the negative electrode of the power supply.

[0033] Step three: detect and calibrate the positions of the workpiece and the two elastic working cathodes;

[0034] Step four: align the two elastic working cathodes with the workpiece, and confirm the initial relative position and the machining gap, and confirm the machining track at the same time;

[0035] Step five: introduce electrolyte, the electrolyte flows into the water inlet pipe 8 through the liquid inlet, and is sprayed to the machining surface at a certain speed through the flexible flow guide sealing sleeve 11 from the liquid outlet;

[0036] Step six: connect the power supply to process, during the processing, the workpiece is rotated and fed under the driving of the rotating shaft and the linear feed shaft, the two elastic working cathodes are linearly moved under the driving of the two sliding sleeves, the working contour of the two elastic working cathodes is adjusted, and the chord length of the two elastic working cathodes is adjusted under the traction of the telescopic rod 5. Under the action of the electrochemical anode dissolution reaction, the material of the workpiece end face opposite to the cathode machining edge is dissolved, and the whole blade disc or blade is formed by machining during the machining;

[0037] Step seven: the machining is finished, the power is turned off, the electrolyte supply is stopped, and the workpiece is removed. The machining parameters and machining path are continuously adjusted by measurement during the machining, and the machining of the whole blisk or blade is completed.

[0038] The principles and implementation manners of the present application are described by using specific examples in the present application. The above example is only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application. In conclusion, the content of the present description should not be understood as a limitation of the present application.

Claims

1. A multi-point driven deformation sleeve shaped device for electrochemical machining of blisks, characterized in that: The utility model relates to a kind of flexible flow guide sealing sleeve, including: first sliding sleeve, the first sliding sleeve is internally provided with sliding slot, blade back elastic working cathode and leaf basin elastic working cathode can be inserted into the sliding slot and be slidably connected with the first sliding sleeve, strip-shaped hole is opened in the first sliding sleeve, and a conductive copper medal can pass through the strip-shaped hole and be inserted into the sliding slot and be fixedly connected with the blade back elastic working cathode and the leaf basin elastic working cathode, and the conductive copper medal can reciprocate in the strip-shaped hole;Second sliding sleeve, the blade back elastic working cathode and the leaf basin elastic working cathode are fixedly connected with the second sliding sleeve at the end away from the first sliding sleeve, and the first sliding sleeve and the second sliding sleeve are fixedly connected with fixed shaft at the end away from each other, and the two fixed shafts are coaxially arranged, a driving device is drivingly connected with the two fixed shafts, and the driving device can drive the two fixed shafts to move towards each other or away from each other;Telescopic assembly is drivingly connected with the blade back elastic working cathode and the leaf basin elastic working cathode, and the telescopic assembly can drive the blade back elastic working cathode and the leaf basin elastic working cathode to move towards each other or away from each other;Flexible flow guide sealing sleeve, part of the edge of one end of the flexible flow guide sealing sleeve is fixedly connected with the blade back elastic working cathode, and another part of the edge is fixedly connected with the leaf basin elastic working cathode;And water inlet pipe is connected with the end of the flexible flow guide sealing sleeve away from the blade back elastic working cathode and is communicated. The telescopic assembly includes two telescopic units arranged symmetrically, each telescopic unit includes a plurality of telescopic rods, one telescopic unit is drivingly connected with the blade back elastic working cathode, and the other telescopic unit is drivingly connected with the leaf basin elastic working cathode. Each telescopic unit includes three telescopic rods. The water inlet pipe is provided with a liquid inlet. The cross-sectional area of the flexible flow guide sealing sleeve is smaller than that of the water inlet pipe. The water inlet pipe is fixedly connected with a bottom plate at one end, and the flexible flow guide sealing sleeve is provided with a limiting plate at one end close to the water inlet pipe, and a fixed body arranged outside the flexible flow guide sealing sleeve can press the limiting plate on the bottom plate.

2. A multi-point driven deformation sleeve device for electrochemical machining of a blisk according to claim 1, characterized in that: ​ 3. A multi-point driven deforming sleeve device for electrochemical machining of a blisk according to claim 2, characterized in that: ​ 4. The multi-point driven deforming sleeve device for electrochemical machining of blisks according to claim 1, characterized in that: ​ 5. The multi-point driven deforming sleeve device for electrochemical machining of blisk according to claim 1, characterized in that: ​ 6. A multi-point driven deforming sleeve device for electrochemical machining of a blisk according to claim 5, wherein: ​

Images