Device and method for multi-channel electrolytic combined machining of revolution curved surface part

Abstract

The invention discloses a multi-channel electrolytic combined machining device and method for a revolution curved surface part. The multi-channel electrolytic combined machining device comprises an electrolyte tank, a pump, a pipeline, a regulating valve, a switching valve, an electromagnetic flowmeter, a machine tool body, a movable platform, a profiling tool cathode, a workpiece and a rotary electricity leading platform. The plurality of pumps are arranged in the electrolyte tank; the pump, the regulating valve, the switching valve and the electromagnetic flowmeter are connected in series through the pipeline; the profiling tool cathode is fixedly connected with the mobile platform from bottom to top; internal flow channels of the profiling tool cathode are connected with a liquid inlet channel, liquid is supplied separately, and the workpiece is fixedly installed on the rotary electricity leading platform. The whole revolution curved surface can be machined at a time, the rough machining process and the semi-finish machining process can be sequentially completed in the same station, the overall machining precision is consistent, the quality of products obtained after machining is stable, and the overall machining efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical machining, and in particular to a device and method for multi-channel electrolytic composite machining of rotational curved surface parts. Background Art

[0002] Aerospace technology is changing with each passing day, with new materials, new processes and new technologies emerging in an endless stream. This has also brought new challenges and opportunities to the processing and manufacturing of difficult-to-process materials such as titanium alloys and nickel-based high-temperature alloys, making high-quality and high-efficiency processing the main goal of current research in this field, guiding scientific researchers to continue exploring and moving forward, striving to break through technical bottlenecks, in order to meet the growing precision manufacturing needs of the aerospace industry and push the entire industry to a higher level.

[0003] In the process of processing such structural parts, the jet electrolytic milling process has shown more significant advantages than traditional conventional mechanical processing methods. Specifically, the jet electrolytic milling technology uses a special hollow tool to act as a cathode, and at the same time, the electrolyte with a specific initial velocity is accurately ejected through the cathode tool to the anode workpiece surface with opposite potential. In this process, the material is removed due to the principle of electrochemical anode dissolution, and the products produced by the processing will be smoothly discharged from the processing area with the flow of the electrolyte, thereby effectively ensuring the continuation of the processing process and the stability and reliability of the processing effect, providing a new and highly potential solution for the efficient and precise processing of such structural parts.

[0004] Large thin-walled structural parts, such as casings, side wall load-bearing structures of return capsules, large thin-walled hard aluminum alloy box plates, etc., are several meters in size. Conventional electrolytic milling tools are only tens of millimeters, and it is difficult to obtain an ideal material removal rate when machining such structural parts. When the cathode tool is widened to several hundred millimeters, flow separation will occur in the tool flow channel, resulting in a chaotic flow field at the outlet. This will lead to uneven dissolution of the processing area and unsatisfactory shape contours. By designing a multi-channel liquid supply, flow separation inside the flow channel can be avoided and a uniform flow field can be achieved. For the tool, an increase in the number of tools can greatly improve the material removal rate. Therefore, it is of great significance to provide a device and method for multi-channel electrolytic milling / electrolytic electrolytic composite machining of rotary surface parts to further improve material removal efficiency and expand the scope of application of electrolytic machining technology in the aerospace field. Summary of the invention

[0005] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0006] In view of the problems existing in the above-mentioned existing devices and methods for multi-channel electrolytic composite processing of rotational curved surface parts, the present invention is proposed.

[0007] Therefore, the purpose of the present invention is to provide a device and method for multi-channel electrolytic composite processing of rotational curved surface parts, which can process the entire rotational curved surface at one time, and can complete the rough processing and semi-finishing processes in sequence in the same workstation. The overall processing accuracy is consistent, the quality of the product obtained after processing is stable, and the overall processing efficiency is improved.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: a device for multi-channel electrolytic composite processing of rotary curved surface parts, comprising an electrolyte tank, a pump, a pipeline, a regulating valve, a switch valve, an electromagnetic flowmeter, a machine tool bed, a mobile platform, a profiling tool cathode, a workpiece and a rotating power-inducing platform;

[0009] A plurality of the pumps are placed in the electrolyte tank;

[0010] The pipeline connects the pump, the regulating valve, the switch valve and the electromagnetic flowmeter in series;

[0011] The cathode of the profiling tool is fixedly connected to the moving platform from bottom to top; the internal flow channels of the cathode of the profiling tool are all connected to a liquid inlet channel for separate liquid supply, and the workpiece is fixedly mounted on the rotating power-inducing platform.

[0012] As a preferred solution of the device for multi-channel electrolytic composite processing of rotational curved surface parts described in the present invention, the flow rate of the cathode liquid inlet of each profiling tool is controlled by arranging pumps, regulating valves, switch valves and electromagnetic flowmeters in multiple flow channels.

[0013] As a preferred solution of the device for multi-channel electrolytic composite machining of rotational curved surface parts described in the present invention, the cathode of the profiling tool is fixedly connected through a moving platform, and the center line is located on the generatrix of the rotating workpiece at different angles.

[0014] As a preferred solution of the device for multi-channel electrolytic composite processing of rotational curved surface parts described in the present invention, the bottom end of the cathode of the profiling tool adopts a profiling design, which is designed according to the surface characteristics of the arc segment required for processing, and the side curvature is also consistent with the arc segment curvature.

[0015] A method for multi-channel electrolytic composite machining of a rotational curved surface part, characterized in that it comprises the following steps:

[0016] Step 1, placing multiple pumps in an electrolyte tank;

[0017] Step 2: Use pipelines to connect the pump, regulating valve, switch valve, and electromagnetic flowmeter in series;

[0018] Step 3, the cathode of the profiling tool is connected to the mobile platform;

[0019] Step 4, controlling the moving platform to make the gap between the cathode end surface of the profiling tool and the surface of the workpiece consistent;

[0020] Step 5, start the electrolyte flow pump and set the target flow of each flow channel;

[0021] Step 6: The electromagnetic flowmeter adjusts the valve by processing the flow signal to ensure that the flow inside the pipeline is consistent with the target flow;

[0022] Step 7, start the power supply and the machine tool control system to start the electrolytic milling / electrolytic electrolytic composite processing;

[0023] Step 8. Turn off the power supply and electrolyte after processing is completed.

[0024] As a preferred solution of the method for multi-channel electrolytic composite processing of rotational curved surface parts described in the present invention, the cathode of the profiling tool is parked at a certain arc segment of the workpiece busbar, the electrolyte is sprayed into the processing area from the cathode outlet gap, and after the power is turned on, the rotating power-inducing platform drives the workpiece to rotate for electrolytic milling / electrolytic discharge composite processing. After one rotation, the entire rotational curved surface processing is completed.

[0025] Beneficial effects of the invention: The invention proposes integrated multi-tool processing of a rotary surface, and utilizes multi-channel fluid supply to achieve multi-tool collaborative work, thereby improving processing efficiency;

[0026] The present invention adopts a discrete profiling tool cathode design, simplifies the cathode motion trajectory, and broadens the application scope of electrolytic milling / electrolytic electrolytic composite processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0028] Figure 1 It is a schematic diagram of the overall structure of the device and method for multi-channel electrolytic composite processing of rotational curved surface parts of the present invention.

[0029] Figure 2 The figure is a schematic diagram of the processing of the device and method for multi-channel electrolytic composite processing of rotational curved surface parts of the present invention.

[0030] Figure 3 It is a schematic diagram of the liquid supply device of the device and method for multi-channel electrolytic composite processing of rotational curved surface parts of the present invention. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0033] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0034] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0035] Reference Figure 1-Figure 3 , a device for multi-channel electrolytic composite machining of rotary curved surface parts is provided, comprising an electrolyte tank 1, a pump 2, a pipeline 3, a regulating valve 4, a switch valve 5, an electromagnetic flowmeter 6, a machine tool bed 7, a mobile platform 8, a profiling tool cathode 9, a workpiece 10 and a rotating power-inducing platform 11;

[0036] A plurality of pumps 2 are placed in the electrolyte tank 1;

[0037] Pipeline 3 connects pump 2, regulating valve 4, switch valve 5, and electromagnetic flowmeter 6 in series;

[0038] The flow rate of the liquid inlet of each cathode 9 of the profiling tool is controlled by arranging a pump 2, a regulating valve 4, a switch valve 5 and an electromagnetic flowmeter 6 in the multi-flow channel.

[0039] The profiling tool cathode 9 is fixedly connected to the mobile platform 8 from bottom to top; the internal flow channels of the profiling tool cathode 9 are connected to a liquid inlet channel, and the liquid is supplied separately. The workpiece 10 is installed and fixed on the rotating power-inducing platform 11. Furthermore, the profiling tool cathode 9 is fixedly connected through the mobile platform 8, and the center line is located on the generatrix of different angles of the rotating workpiece 10. Specifically, the bottom end of the profiling tool cathode 9 adopts a profiling design, which is designed according to the surface characteristics of the arc segment to be processed, and the side curvature is also consistent with the arc segment curvature.

[0040] A method for multi-channel electrolytic composite machining of a rotational curved surface part, characterized in that it comprises the following steps:

[0041] Step 1, placing a plurality of pumps 2 in an electrolyte tank 1;

[0042] Step 2: Use pipeline 3 to connect pump 2, regulating valve 4, switch valve 5, and electromagnetic flowmeter 6 in series;

[0043] Step 3, the profiling tool cathode 9 is connected to the mobile platform 8;

[0044] Step 4, controlling the moving platform 8 to make the gap between the end face of the profiling tool cathode 9 and the surface of the workpiece 10 consistent;

[0045] Step 5, start the electrolyte flow pump 2 and set the target flow rate of each flow channel;

[0046] Step 6, the electromagnetic flowmeter 6 adjusts the valve by processing the flow signal to ensure that the flow inside the pipeline is consistent with the target flow;

[0047] Step 7, start the power supply and the machine tool control system to start the electrolytic milling / electrolytic electrolytic composite processing;

[0048] Step 8. Turn off the power supply and electrolyte after processing is completed.

[0049] Among them, the cathode 9 of the profiling tool is parked at a certain arc segment of the generatrix of the workpiece 10, and the electrolyte is sprayed into the processing area from the cathode outlet gap. After the power is turned on, the rotating power-inducing platform 11 drives the workpiece 10 to rotate for electrolytic milling / electrolytic discharge composite processing. After one rotation, the entire rotary surface processing is completed.

[0050] The method aims to realize efficient electrolytic milling of large-sized thin-walled weak-rigidity parts by using multiple flow channels and multiple tool cathodes for liquid supply. Electrolyte is extracted by multiple pumps 2 to supply multiple flow channels 3, which are then connected to the tool cathode 9 to make the flow field of the tool cathode 9 uniform. Then, the machine tool control system and fixture are used to realize the coordinated processing of multiple tool cathodes to improve the material removal efficiency.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A device for multi-channel electrolytic composite machining of rotational curved surface parts, characterized in that: It comprises an electrolyte tank (1), a pump (2), a pipeline (3), a regulating valve (4), a switch valve (5), an electromagnetic flowmeter (6), a machine tool bed (7), a mobile platform (8), a profiling tool cathode (9), a workpiece (10) and a rotating power-inducing platform (11); A plurality of pumps (2) are placed in the electrolyte tank (1); The pipeline (3) connects the pump (2), the regulating valve (4), the switch valve (5), and the electromagnetic flowmeter (6) in series; The profiling tool cathode (9) is fixedly connected to the mobile platform (8) from bottom to top; the internal flow channels of the profiling tool cathode (9) are all connected to a liquid inlet channel for separate liquid supply, and the workpiece (10) is fixedly mounted on the rotating power-inducing platform (11).

2. The device for multi-channel electrolytic composite machining of rotational curved surface parts according to claim 1, characterized in that: By arranging a pump (2), a regulating valve (4), a switch valve (5) and an electromagnetic flowmeter (6) in the multi-flow channel, the flow rate of the liquid inlet of each profiling tool cathode (9) is controlled.

3. The device for multi-channel electrolytic composite machining of rotational curved surface parts according to claim 2, characterized in that: The profiling tool cathode (9) is fixedly connected via a moving platform (8), and the center line is located on generatrixes of different angles of the rotating workpiece (10).

4. The device for multi-channel electrolytic composite machining of rotational curved surface parts according to claim 3 is characterized in that: The bottom end of the profiling tool cathode (9) is designed in a profiling manner according to the curved surface characteristics of the arc segment to be processed, and the curvature of the side surface is consistent with the curvature of the arc segment.

5. A method for multi-channel electrolytic composite machining of a rotational curved surface part, characterized in that: The following steps are involved: Step 1, placing a plurality of pumps (2) in an electrolyte tank (1); Step 2: Use pipeline (3) to connect the pump (2), regulating valve (4), switch valve (5), and electromagnetic flowmeter (6) in series; Step 3, the profiling tool cathode (9) is connected to the moving platform (8); Step 4, controlling the moving platform (8) to make the gap between the end face of the cathode (9) of the profiling tool and the surface of the workpiece (10) consistent; Step 5, start the electrolyte flow pump (2) and set the target flow rate of each flow channel; Step 6, the electromagnetic flowmeter (6) adjusts the valve by processing the flow signal to ensure that the flow rate inside the pipeline is consistent with the target flow rate; Step 7, start the power supply and the machine tool control system to start the electrolytic milling / electrolytic electrolytic composite processing; Step 8. Turn off the power supply and electrolyte after processing is completed.

6. The method for multi-channel electrolytic composite machining of a rotational curved surface part according to claim 5, characterized in that: The cathode (9) of the profiling tool is parked at a certain arc section of the generatrix of the workpiece (10), and the electrolyte is sprayed into the processing area from the cathode outlet slit. After the power is turned on, the rotating power-introducing platform (11) drives the workpiece (10) to rotate for electrolytic milling / electrolytic discharge composite processing. After one rotation, the entire rotary curved surface processing is completed.

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