Electrolytic machining apparatus and method for the entire surface of a shrouded wing by in-situ deformation of an integrated cathode

Abstract

An electrolytic machining apparatus and method for the entire mold surface of a shrouded wing by in-situ deformation of an integrated cathode, belonging to the field of electrolytic machining, wherein the wing ventral / wing dorsal cathode body in the apparatus is composed of a cathode base, shroud edge plate cathode, wing body cathode, dovetail edge plate cathode, shroud side watertight block, dovetail side watertight block, and upper end watertight block, and during machining, the drive device and deformation mechanism cause both side edge plate cathodes to be initially retracted inward, and as the wing body mold surface is machined and the wing body mold surface is machined to a predetermined depth, both side edge plate cathodes generate an outward expansion movement, thereby machining the wing body mold surface and simultaneously causing the both side edge plate cathodes to generate in-situ oscillating deformation that approaches the edge plate mold surfaces on both sides of the wing, thereby achieving synchronous electrolytic machining of the wing body and both side edge plate entire mold surfaces of the shrouded wing, and the apparatus can improve machining efficiency, machining accuracy, and surface quality, and has a relatively good prospect for practical application.

Claims

1. An electrolytic machining apparatus for the entire surface of a shrouded wing by in-situ deformation of an integrated cathode, Including the ventral / dorsal wing cathode body, the ventral / dorsal wing drive device, and the ventral / dorsal wing deformation mechanism, The ventral / dorsal wing drive device includes a through-shaft linear motor, an insulating connecting plate (2), and a motor through-shaft. The insulating connecting plate (2) is fixed to the front of the through-shaft linear motor, and the motor through-shaft is mounted inside the through-shaft linear motor. The forward or reverse rotation of the through-shaft linear motor drives its reciprocating linear motion in the longitudinal direction. The ventral / dorsal wing cathode body is composed of a cathode base (34), a shroud edge plate cathode (32), a wing body cathode (33), a dovetail edge plate cathode (36), a shroud side watertight block (13), a dovetail side watertight block (38), and an upper end watertight block (14). The rear end of the cathode base (34) is attached to the front side of the insulating connection plate (2), and the cathode base (34) is divided into a rear cathode base and a front cathode base. The shroud-side watertight block (13), the dovetail-side watertight block (38), and the upper end watertight block (14) are located above the rear of the cathode base, the lower end surface of the shroud-side watertight block (13) is connected to the left side of the rear of the cathode base (34), the lower end surface of the dovetail-side watertight block (38) is connected to the right side of the rear of the cathode base (34), and the upper end watertight block (14) is mounted above the shroud-side watertight block (13) and the dovetail-side watertight block (38). The shroud edge plate cathode (32), the wing body cathode (33), and the dovetail edge plate cathode (36) are located above the front of the cathode base, the lower end surface of the wing body cathode (33) is connected to the front end of the cathode base (36), the left end surface of the wing body cathode (33) is connected to the front side of the shroud edge plate cathode (32), and the right end surface of the wing body cathode (33) is connected to the front side of the dovetail edge plate cathode (38). The space above the cathode base (36), surrounded by the shroud edge plate cathode (32), the wing body cathode (33), the dovetail edge plate cathode (36), the shroud side watertight block (13), and the dovetail side watertight block (38), is referred to as the deformation mechanism mounting cavity. The ventral / dorsal wing deformation mechanism is located within a deformation mechanism mounting cavity and consists of an insulating block (29), a push rod (30), a first connecting rod (31), and a second connecting rod (37), the insulating block (29) is attached to the front end of the motor through shaft, the rear end of the push rod (30) is connected to the insulating block (29), the front end of the push rod (30) is connected to the rear end of the first connecting rod (31) and the rear end of the second connecting rod (37), respectively, the front end of the first connecting rod (31) is connected to the rear side of the shroud edge plate cathode (32), and the front end of the second connecting rod (37) is connected to the rear side of the dovetail edge plate cathode (36), characterized in that an electrolytic machining apparatus for the entire surface of a shrouded wing by in-situ deformation of an integrated cathode is provided.

2. The electrolytic machining apparatus for the entire surface of a shrouded wing by in-situ deformation of an integrated cathode, as described in claim 1, characterized in that the cathode base (34), shroud edge plate cathode (32), wing body cathode (33), dovetail edge plate cathode (36), shroud side watertight block (13), and dovetail side watertight block (38) are integrally structured.

3. The electrolytic machining apparatus for the entire surface of a shrouded wing by in-situ deformation of an integrated cathode according to claim 2, characterized in that microslits (35) are provided at the joint between the wing body cathode (33) and the shroud edge plate cathode (32), at the joint between the wing body cathode (33) and the dovetail edge plate cathode (36), and above and below the joint.

4. The electrolytic machining apparatus for the entire surface of a shrouded wing by in-situ deformation of an integrated cathode, characterized in that a relief notch is provided at the front of the cathode base (34) to avoid interference with the shrouded edge plate cathode (32) and the dovetail edge plate cathode (36) during deformation.

5. The electrolytic machining apparatus for the entire surface of a shrouded wing by in-situ deformation of an integrated cathode according to claim 1, characterized in that the outer surfaces of the shrouded edge plate cathode (32) and the dovetail edge plate cathode (36) are slopes having a certain angle, and the thickness gradually increases from the rear end to the front end.

6. The wing fixture with shroud further includes a fixture wing ventral water stop plate (15), a fixture wing dorsal water stop plate (22), a shroud retaining block (17), and a dovetail retaining block (24), the shroud retaining block (17) and the dovetail retaining block (24) being connected to the left and right sides of the fixture body (26), respectively, and a first side wall insulating plate (16) connected between the fixture wing ventral water stop plate (15) and the shroud retaining block (17), and between the shroud retaining block (17) and the fixture wing dorsal water stop plate (22). The electrolytic processing apparatus for the entire surface of a shrouded wing by in-situ deformation of an integrated cathode according to claim 1, further comprising a connected second side wall insulating plate (20), a third side wall insulating plate (23) connected between a dovetail retaining block (24) and a jig wing dorsal water stop plate (22), and a fourth side wall insulating plate (27) connected between a jig wing ventral water stop plate (15) and a dovetail retaining block (24), further comprising a jig upper cover (3), wherein the jig upper cover (3) is provided with an electrolyte inlet housing cavity (4).

7. A method for using an electrolytic machining apparatus for the entire surface of a shrouded blade by in-situ deformation of an integrated cathode as described in claim 1, Step 1) divides the cathode body into a wing-ventral cathode body and a wing-dorsal cathode body, divides the drive unit into a wing-ventral drive unit and a wing-dorsal drive unit, and divides the deformation mechanism into a wing-ventral deformation mechanism and a wing-dorsal deformation mechanism, Step 2) involves mounting the ventral wing drive unit and the ventral wing cathode body integrally on the Y1 axis of the machine tool, mounting the dorsal wing drive unit and the dorsal wing cathode body integrally on the Y2 axis of the machine tool, mounting the shrouded wing jig on the workbench of the machine tool, mounting the wing blank on the shrouded wing jig and pressing it firmly, then setting the tool and leaving a certain initial machining gap, Step 3) involves starting the ventral-wing through-shaft linear motor (1) and the dorsal-wing through-shaft linear motor (9), causing the ventral-wing motor through-shaft (12) and the dorsal-wing motor through-shaft (21) to move linearly backward, and the tensile force of the connecting rods causing the shroud edge plate cathodes (32) and dovetail edge plate cathodes (36) on both sides to be pulled inward to a predetermined position and come to rest. Step 4) connects the ventral and dorsal cathode bodies of the wing to the negative terminal of the power supply, and connects the wing blank to the positive terminal of the power supply. Step 5) involves a high-pressure, high-speed electrolyte flowing into the processing area and covering the entire surface of the mold with the shrouded blade, Step 6) involves starting the power supply, driving the ventral wing drive unit and the ventral wing cathode body, and the dorsal wing drive unit and the dorsal wing cathode body, respectively, by the Y1 axis and Y2 axis of the machine tool, and gradually approaching the wing body while being moved toward each other at a predetermined speed, thereby gradually forming the wing body mold surface through electrochemical action, When the wing body mold surface is machined to a predetermined depth, the wing ventral through-axis linear motor (1) and the wing dorsal through-axis linear motor (9) are started synchronously, and the linear motion through-axis pushes the shroud edge plate cathodes and dovetail edge plate cathodes on both sides via the push rod (30), first connecting rod (31), and second connecting rod (37), generating an outward expansion motion. This processes the wing body mold surface and simultaneously generates in-situ oscillating deformation in which the edge plate cathodes on both sides approach the wing's side edge plate mold surfaces, i.e., the entire mold surface of the wing body and both side edge plates has a feed component (step 7). When the Y1 and Y2 axes of the machine tool are moved to the final machining position, the spindle of the machine tool, the ventral-side through-axis linear motor (1), and the dorsal-side through-axis linear motor (9) of the machine tool stop simultaneously, completing the synchronous electrolytic machining of the entire surface of the wing body and both side edge plates of the shrouded wing, thus ending the machining process (step 8). A method characterized by including step 9) turning off the power and stopping the liquid supply from the electrolyte pump.

8. A method for using an electrolytic machining apparatus for the entire mold surface of a shrouded blade by in-situ deformation of an integrated cathode as described in claim 7, characterized in that a new mode of multi-channel coordinated liquid supply for the entire mold surface is used, namely, a plurality of electrolyte channels are provided on both side edge plates and the blade body portion of the shrouded blade (19), the plurality of electrolyte channels coordinately supply liquid during machining, the flow field covers the entire mold surface of the shrouded blade (19), improving the stability and reachability of the flow field, and at the same time, the flow field mode divides the machining area into a plurality of small flow areas, improving the uniformity of the flow field and the cleaning action.

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