A generating electrolytic servo seal

Abstract

The application discloses a kind of build-up electrolytic servo sealing devices, comprising: to be processed internal spline workpiece, the to be processed internal spline workpiece is installed in lower part of build-up electrolytic servo sealing device lower part, and to be processed internal spline workpiece with build-up electrolytic servo sealing device lower part between by bolt is fixed, rectifier servo sleeve is installed between to be processed internal spline workpiece and build-up electrolytic servo sealing device lower part, build-up electrolytic servo sealing device middle part is connected with cathode rod, and the bottom of cathode rod is inserted in the internal cavity of rectifier servo sleeve.The build-up electrolytic servo sealing device, servo sealing device is divided into upper, middle, lower three parts, middle part is connected with cathode rod, through middle part, keep and form multiple contact labyrinth type waterproof device with upper, lower two parts;Add servo rectifier device in workpiece to be processed internal cavity, effectively improve the problem of uneven electrolyte distribution, and improve flow field.

Description

Technical Field

[0001] This invention relates to the field of fluid sealing and flow field optimization, specifically to a generating electrolytic follow-up sealing device. Background Technology

[0002] Electrolytic machining is a method of forming parts with certain dimensional accuracy and surface roughness by utilizing the principle of electrochemical anodic dissolution of metal in an electrolyte. It is commonly used in the manufacturing of parts for aerospace and other equipment. The electrolyte functions as both a conductive and reactive medium, therefore the electrolytic machining process takes place within it. During machining, the electrolyte needs to flow at high speed in the machining area to flush away impurities and heat generated in the reaction. Therefore, the electrolyte pressure, flow rate, and other electrolyte parameters, as well as the flow field formed by the electrolyte, all have a significant impact on the machining process.

[0003] Generating electrochemical machining (EDM) differs from conventional EDM in its motion. In conventional EDM, the cathode is fed downwards along the Z-axis, "copying" its shape onto the workpiece. Generating EDM, however, achieves machining through the generating motion of the tool cathode and the workpiece anode. This makes the sealing methods of conventional EDM fixtures unsuitable for generating EDM. Furthermore, because the cathode in generating EDM is smaller than the inner cavity of the workpiece, insufficient electrolyte distribution in the machining area can easily occur, leading to difficulties in the machining process and compromised machining accuracy. Summary of the Invention

[0004] The purpose of this invention is to provide a generating electrolytic follow-up sealing device to solve the defects mentioned in the background art.

[0005] To achieve the above objectives, a generating electrolytic follow-up sealing device is provided, comprising: a cathode rod, an upper part of the generating electrolytic follow-up sealing device, a middle part of the generating electrolytic follow-up sealing device, a lower part of the generating electrolytic follow-up sealing device, a rectifier follow-up sleeve, an internal spline workpiece to be processed, and a generating electrolytic processing cathode;

[0006] The internal spline workpiece to be processed is installed at the lower part of the lower part of the generating electrolytic follower sealing device, and the internal spline workpiece to be processed and the lower part of the generating electrolytic follower sealing device are fixed by bolts. The rectifier follower sleeve is installed between the internal spline workpiece to be processed and the lower part of the generating electrolytic follower sealing device. The middle part of the generating electrolytic follower sealing device is connected to the cathode rod, and the bottom of the cathode rod is inserted into the internal cavity of the rectifier follower sleeve. A sealing gasket is placed between the upper part and the lower part of the generating electrolytic follower sealing device, and the upper part and the lower part of the generating electrolytic follower sealing device are fixed by bolts. The generating electrolytic processing cathode is installed at the bottom of the cathode rod.

[0007] Preferably, the upper part, the middle part, and the lower part of the electrolytic follow-up sealing device are combined together to form the electrolytic follow-up sealing device.

[0008] Preferably, the upper and lower parts of the electrolytic follow-up sealing device are made of metal. A washer is added to the connecting plane between the upper and lower parts of the electrolytic follow-up sealing device, and the connection is fastened by bolts and nuts. The upper ends of both the upper and lower parts of the electrolytic follow-up sealing device are circular.

[0009] Preferably, an "O"-ring seal is provided in the connection area between the middle part of the electrolytic follow-up sealing device and the cathode rod, and the middle part of the electrolytic follow-up sealing device and the cathode rod are concentric circles.

[0010] Preferably, the outer diameter of the rectifier follower sleeve is consistent with the inner diameter of the inner spline workpiece to be processed, and the rectifier follower sleeve is deployed to form an electrolytic machining cathode with a rotating structure in the inner ring region of the inner spline workpiece to be processed.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the follow-up sealing device is divided into three parts: upper, middle and lower. The middle part is connected to the cathode rod. Through the middle part, a labyrinth-type waterproof device is formed to maintain multiple contacts with the upper and lower parts. The follow-up rectifier device is added to the inner cavity of the workpiece to be processed, which effectively improves the problem of uneven electrolyte distribution and improves the flow field. It also effectively reduces the volume of the cathode, thereby reducing the processing difficulty of the cathode and lowering the cost.

[0012] This invention differs from the sealing method used in conventional electrolytic machining fixtures. Typically, electrolytic machining sealing fixtures use an O-ring at the connection between the fixture cover and the cathode rod to allow movement along the Z-axis without leakage, but this only allows movement along the Z-axis. In this invention, the upper and lower parts are not directly fixed to the middle part. The middle part allows the cathode rod to move along the Z-axis without leakage, while also allowing translation in the X and Y directions. This satisfies the generating motion relationship between the cathode tool and the anode workpiece, expanding the motion forms of electrolytic machining. Attached Figure Description

[0013] Figure 1 This is a two-dimensional schematic diagram of the generating electrolytic follow-up sealing rectifier device of the present invention.

[0014] Figure 2 Schematic diagram of the cathode rod;

[0015] Figure 3 This is a three-dimensional front view of the upper part of the electrolytic follow-up sealing device of the present invention.

[0016] Figure 4This is a three-dimensional reverse view of the upper part of the electrolytic follow-up sealing device of the present invention.

[0017] Figure 5 This is a three-dimensional schematic diagram of the lower part of the electrolytic follow-up sealing device of the present invention.

[0018] Figure 6 The structure of this invention is the workpiece to which this invention applies;

[0019] Figure 7 This is a three-dimensional schematic diagram of the electrolytic rectifier follower sleeve structure of the present invention;

[0020] Figure 8 This is a three-dimensional schematic diagram of the electrolytic cathode structure of the present invention.

[0021] Figure 9 This is a diagram showing the combination of the cathode and cathode rod in the present invention.

[0022] Figure 10 This is a three-dimensional schematic diagram of the assembled electrolytic follow-up sealing device of the present invention.

[0023] Figure 11 , 12 Figures 13 and 14 are schematic diagrams showing the dimensions of the electrolytic follow-up sealing device generated by the structural solution of the present invention.

[0024] The following are the labels in the diagram: 1. Cathode rod; 2. Upper part of the electrolytic follower sealing device; 3. Middle part of the electrolytic follower sealing device; 4. Lower part of the electrolytic follower sealing device; 5. Rectifying follower sleeve; 6. Workpiece with internal spline to be processed; 7. Electrolytic cathode. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figure 1-14 The present invention provides a generating electrolysis follow-up sealing device, comprising: a cathode rod 1, an upper part of the generating electrolysis follow-up sealing device 2, a middle part of the generating electrolysis follow-up sealing device 3, a lower part of the generating electrolysis follow-up sealing device 4, a rectifier follow-up sleeve 5, and an internal spline workpiece to be processed 6.

[0027] The internal spline workpiece 6 to be processed is installed at the lower part of the lower part 4 of the generating electrolytic follower sealing device, and the internal spline workpiece 6 to be processed and the lower part 4 of the generating electrolytic follower sealing device are fixed together by bolts. The rectifier follower sleeve 5 is installed between the internal spline workpiece 6 to be processed and the lower part 4 of the generating electrolytic follower sealing device. The middle part 3 of the generating electrolytic follower sealing device is connected to the cathode rod 1, and the bottom of the cathode rod 1 is inserted into the internal cavity of the rectifier follower sleeve 5. A sealing gasket is placed between the upper part 2 of the generating electrolytic follower sealing device and the lower part 4 of the generating electrolytic follower sealing device, and the upper part 2 of the generating electrolytic follower sealing device and the lower part 4 of the generating electrolytic follower sealing device are fixed together by bolts. The generating electrolytic processing cathode 7 is installed at the bottom of the cathode rod 1.

[0028] Working principle: The follower sealing device includes an external follower sealing device and an internal follower sleeve component. During the processing, the external sealing device can maintain the seal of the electrolytic machining area when the cathode and the workpiece are in relative rotational motion. The follower sleeve component placed in the inner ring of the inner spline workpiece rotates with the rotation of the generating cathode, ensuring that the flow field of the cathode machining tooth surface and the electrolytic machining area of ​​the workpiece is uniform and stable.

[0029] The follow-up sealing device is divided into three parts: upper, middle and lower. The middle part is connected to the cathode rod. Through the middle part, a labyrinth-type waterproof device is formed to maintain multiple contacts with the upper and lower parts. The follow-up rectifier device is added to the inner cavity of the workpiece to be processed, which effectively improves the problem of uneven electrolyte distribution and improves the flow field.

[0030] During the processing, the internal spline workpiece 6 to be processed is placed in the lower part 4 of the generating electrolytic follower sealing device and is fastened from the sides by bolts on both sides; the follower sealing device is installed on the machine tool worktable and has a drain hole at the bottom, through which the electrolyte can be discharged; the cathode processing surface is arrayed with fine water outlet holes to introduce the electrolyte into the processing area; the internal spline workpiece 6 to be processed is placed in the lower part 4 of the generating electrolytic follower sealing device, and the rectifier follower sleeve 5 is placed in the inner ring of the internal spline workpiece 6 to be processed.

[0031] In a preferred embodiment, the upper part 2, the middle part 3, and the lower part 4 of the electrolytic follow-up sealing device are combined together to form the electrolytic follow-up sealing device.

[0032] like Figure 1 As shown: The generating electrolytic machining cathode 7 is inserted into the internal cavity of the rectifier follower sleeve 5, and the upper part 2 and the lower part 4 of the generating electrolytic follower sealing device are connected and fastened with bolts. During the machining process, the cathode rod 1 is driven to rotate by the machine tool spindle, and the workpiece 6 to be machined is driven to rotate by the lower part 4 of the generating electrolytic follower sealing device, and the two perform a high-precision generating motion.

[0033] In a preferred embodiment, the upper part 2 and the lower part 4 of the electrolytic follow-up sealing device are made of metal. Washers are added to the connecting plane of the upper part 2 and the lower part 4 of the electrolytic follow-up sealing device, and they are fastened by bolts and nuts. The upper ends of the upper part 2 and the lower part 4 of the electrolytic follow-up sealing device are both circular.

[0034] The middle part 3 of the electrolytic follow-up sealing device is connected to the cathode and must be made of non-metallic material to ensure conductivity and insulation. Its surface has high smoothness, which can meet the requirement of smooth sliding under small gaps. The upper part 2 and the lower part 4 of the electrolytic follow-up sealing device are made of metal. Washers are added in the connecting plane of the upper part 2 and the lower part 4 of the electrolytic follow-up sealing device and the connection is tightened by bolts and nuts to ensure sealing.

[0035] In a preferred embodiment, an "O"-ring seal is provided in the connection area between the middle part 3 of the electrolytic follow-up sealing device and the cathode rod 1, and the middle part 3 of the electrolytic follow-up sealing device and the cathode rod 1 are concentric circles.

[0036] The assembly and combination of the middle part 3 of the electrolytic follow-up sealing device, the upper part 2 of the electrolytic follow-up sealing device, and the lower part 4 of the electrolytic follow-up sealing device form a multi-seal leak-proof structure.

[0037] The rectifying follower sleeve 5 fills the entire cavity to be processed, preventing the electrolyte from flowing into the unprocessed area of ​​the inner spline workpiece 6 and causing unnecessary stray corrosion. The outer surface of the rectifying follower sleeve 5 has high smoothness, which makes the contact between the rectifying follower sleeve 5 and the inner spline workpiece 6 to be processed smooth and the motion friction small, ensuring that the rectifying follower sleeve 5 rotates stably with the cathode in the inner ring area of ​​the inner spline workpiece 6 to be processed.

[0038] In a preferred embodiment, the outer diameter of the rectifier follower sleeve 5 is consistent with the inner diameter of the inner spline workpiece 6 to be processed, and the rectifier follower sleeve 5 is rotated in the inner ring region of the inner spline workpiece 6 as the electrolytic machining cathode 7 is formed.

[0039] The final dimensions of the follow-up sealing device are determined by the cathode machining tooth height H / mm, required machining depth a / mm, workpiece inner diameter b, and cathode tooth tip circle diameter da. The dimensions of each part are as follows: Figure 11-14 As shown, the determination process is as follows:

[0040] 1. First, determine the maximum translational distance S of the generated cathode. When the cathode rod 1 is coaxial with the workpiece, the cathode rod 1 first translates to the left until it touches the workpiece without any deviation of the workpiece axis. Record the coordinates as the initial position. Then, translate to the right until it touches the workpiece without any deviation of the axis. The distance traveled is as follows: Figure 11 As shown, S1 = b - da;

[0041] 2. Secondly, given that the required machining depth is a (a < H), based on the inner diameter b of the workpiece to be machined and the cathode tooth tip circle diameter da, according to... Figure 11 It can be known that the travel limit of the cathode is S = S1 + 2a = b - da + 2a;

[0042] 3. Based on the lower dimensions of the follow-up sealing device, determine that under extreme conditions, when the middle part of the follow-up sealing device is machined to its maximum depth, the other side can still cover the machined area; based on the workpiece wall thickness c and the lower wall thickness d of the sealing device, it can be concluded that when machined to its maximum depth on one side, if... Figure 12 As shown, the distance between the axis of cathode rod 1 and the lower outer contour line of the follow-up sealing device on the other side, i.e. the radius of the middle baffle, is R1 = b - da / 2 + a + c + d.

[0043] Given the radius of the middle baffle and the stroke of the cathode, in order for the middle baffle to move freely between the upper and lower parts, the maximum radius of the lower part of the follower sealing device must ensure that when the cathode rod 1 is in its extreme position, the middle baffle remains within the sealing device. Figure 11-14 As shown, the maximum radius of the lower part of the sealing device is the sum of the distance between the workpiece axis and the cathode rod 1 axis and the radius of the middle baffle when the workpiece is machined to the deepest position, i.e., R2 = b - da / 2 + a + R1.

[0044] This invention differs from the sealing method used in conventional electrolytic machining fixtures. Typically, electrolytic machining sealing fixtures use an O-ring at the connection between the fixture cover and the cathode rod to allow movement along the Z-axis without leakage, but this only allows movement along the Z-axis. In this invention, the upper and lower parts are not directly fixed to the middle part. The middle part allows the cathode rod to move along the Z-axis without leakage, while also allowing translation in the X and Y directions. This satisfies the generating motion relationship between the cathode tool and the anode workpiece, expanding the motion forms of electrolytic machining.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A generating electrolysis follow-up sealing device, characterized in that, Includes cathode rod (1), upper part of electrolytic follower sealing device (2), middle part of electrolytic follower sealing device (3), lower part of electrolytic follower sealing device (4), rectifier follower sleeve (5), workpiece to be processed internal spline (6), and electrolytic processing cathode (7); The internal spline workpiece (6) to be processed is installed at the lower part (4) of the generating electrolytic follower sealing device, and the internal spline workpiece (6) to be processed and the lower part (4) of the generating electrolytic follower sealing device are fixed by bolts. The rectifier follower sleeve (5) is installed between the internal spline workpiece (6) to be processed and the lower part (4) of the generating electrolytic follower sealing device. The middle part (3) of the generating electrolytic follower sealing device is connected to the cathode rod (1), and the bottom of the cathode rod (1) is inserted into the internal cavity of the rectifier follower sleeve (5). The upper part (2) of the generating electrolytic follower sealing device and the generating electrolytic follower sealing device are connected. A sealing gasket is placed between the lower part (4) of the follow-up sealing device. The upper part (2) of the electrolytic follow-up sealing device and the lower part (4) of the electrolytic follow-up sealing device are fixed with bolts. The bottom of the cathode rod (1) is equipped with the electrolytic processing cathode (7). A gasket is added to the connecting plane of the upper part (2) of the electrolytic follow-up sealing device and the lower part (4) of the electrolytic follow-up sealing device, and the connection is tightened by bolts and nuts. The upper ends of the upper part (2) of the electrolytic follow-up sealing device and the lower part (4) of the electrolytic follow-up sealing device are both circular. An "O"-shaped sealing ring is provided in the connection area between the middle part (3) of the electrolytic follow-up sealing device and the cathode rod (1), and the middle part (3) of the electrolytic follow-up sealing device and the cathode rod (1) are concentric circles.

2. The electrolytic follow-up sealing device according to claim 1, characterized in that: The upper part (2), the middle part (3), and the lower part (4) of the electrolytic follow-up sealing device are combined to form the electrolytic follow-up sealing device.

3. The electrolytic follow-up sealing device according to claim 1, characterized in that: The outer diameter of the rectifier follower sleeve (5) is consistent with the inner diameter of the inner spline workpiece (6) to be processed. The rectifier follower sleeve (5) is formed into an electrolytic machining cathode (7) with a rotating structure in the inner ring area of ​​the inner spline workpiece (6) to be processed.

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