Underwater EDM device driven by servo cylinder

Abstract

The utility model discloses an underwater EDM device driven by a servo cylinder, which comprises an underwater servo electric cylinder actuator, the bottom of the servo electric cylinder actuator is fixedly connected with a mounting seat, and the bottom of the servo electric cylinder actuator penetrates through the mounting seat and is fixedly connected with an electrode device. Cylindrical guide rails are symmetrically arranged on the side, close to the electrode device, of the mounting base, and an auxiliary element is arranged on the top of the mounting base. The underwater EDM device driven by the servo electric cylinder is used in cooperation with an underwater dust collector, the control rod guide cylinder fastening bolt clamping treatment can be achieved by means of the underwater camera, the post-treatment procedure is achieved, meanwhile, only electric control and an EDM power source are needed, and expensive hydraulic servo valves, servo pump stations and hydraulic pipelines do not need to be arranged. The device is small in boundary dimension and meets the requirement for operation in an underwater narrow working space.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power technology, specifically to a servo cylinder driven underwater EDM device. Background Technology

[0002] Bolt drilling technology is a bolt seizure removal technique that has emerged in recent years. This method uses portable equipment to remove the bolt on-site via boring. First, a tooling fixture is installed to cut the seizured. The fixture is then used to center the bolt, ensuring the boring machine spindle and screw centers coincide. The remaining bolt is removed, and the bolt's inner hole is machined until the inner diameter is close to the minor thread diameter. A hand tool is then used to unravel the existing thread in the bolt hole. Finally, the threaded hole is tapped, or the thread is directly enlarged before tapping again. Due to the limited installation space for the control rod guide cylinder and the numerous auxiliary devices, conventional equipment cannot meet the usage requirements. Utility Model Content

[0003] To solve the above-mentioned technical problems, an underwater EDM device driven by a servo electric cylinder was developed and designed. It mainly uses the servo electric cylinder to drive the electrode to realize electrical discharge machining, cut the seized bolts, and then perform subsequent back-tapping or hole enlargement and tapping operations.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a servo cylinder driven underwater EDM device, including a servo electric cylinder actuator for underwater use, a mounting base fixedly connected to the bottom of the servo electric cylinder actuator, an electrode device fixedly connected to the bottom of the servo electric cylinder actuator through the mounting base, cylindrical guide rails symmetrically arranged on the side of the mounting base near the electrode device, and auxiliary components arranged on the top of the mounting base.

[0005] The servo electric cylinder actuator includes a mounting flange, a sealing flange on the surface of the mounting flange, and an actuator end sealing chamber on the other side of the sealing flange. The actuator end sealing chamber is fixedly connected to the mounting flange and the sealing flange respectively by bolts. A servo motor end sealing chamber is fixedly connected to the other end of the actuator end sealing chamber. A servo motor is installed inside the servo motor end sealing chamber. A precision linear actuator is installed at the output end of the servo motor. A watertight connector is electrically connected to the other end of the servo motor end sealing chamber. A pressure gauge and a shut-off valve are respectively installed on the surface of the servo motor end sealing chamber. A waterproof cable for use with the watertight connector is installed on the surface of the watertight connector.

[0006] The servo motor includes a servo motor main unit, a connecting bracket mounted on the surface of the servo motor main unit, an encoder disposed on the outer side of the connecting bracket, a tachogenerator housing, a rotor, and an inner housing disposed at the rear end of the servo motor main unit, an adapter plate fixedly connected between the rotor and the servo motor main unit, a first screw fixedly connected to the other end of the rotor, an adapter shaft fixedly connected to the surface of the first screw, a first coupling fixedly connected to the other end of the adapter shaft, and the first coupling is used in conjunction with the central shaft of the servo motor main unit, a second screw disposed on the surface of the encoder, and the second screw fixedly connected to the connecting bracket, a third screw disposed on the surface of the housing, and the third screw fixedly connected to the adapter plate, and a fourth screw disposed on the outer side of the connecting bracket, and the fourth screw fixedly connected to the adapter plate.

[0007] As a preferred embodiment of this utility model, a first sealing ring is provided between the actuator end sealing chamber and the servo motor end sealing chamber, a guide rod sealing ring is fixedly connected to the surface of the precision linear actuator, and the guide rod sealing ring is used in conjunction with the actuator end sealing chamber. A second sealing ring and a third sealing ring are respectively provided between the actuator end sealing chamber and the sealing flange, and between the sealing flange and the mounting flange.

[0008] In a preferred embodiment of this invention, a guide rod end is provided on one side of the precision linear actuator, and the guide rod end is used in conjunction with a sealing flange through two sealing devices. A second coupling is fixedly connected to the input end of the precision linear actuator. An adapter flange is fitted on the surface of the second coupling. A bell-shaped cover is provided on one side of the adapter flange, and the bell-shaped cover is located on the surface of the second coupling. A servo motor adapter plate is provided at the other end of the adapter flange, and the servo motor adapter plate is used in conjunction with the servo motor.

[0009] As a preferred embodiment of this utility model, a watertight connector adapter plate is fitted on the surface of the watertight connector, and the watertight connector adapter plate is fixedly connected to the servo motor end sealing chamber. A fourth sealing ring is installed between the watertight connector adapter plate and the servo motor end sealing chamber.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] This invention utilizes a servo-driven electric cylinder-operated underwater EDM device, used in conjunction with an underwater vacuum cleaner. With the aid of an underwater camera, it can resolve the issue of the control rod guide cylinder's locking bolts, enabling post-processing. Furthermore, it only requires electrical control and EDM power, eliminating the need for expensive hydraulic servo valves, servo pump stations, and hydraulic pipelines. The device's compact size makes it suitable for operation in confined underwater spaces. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is an exploded view of the servo electric cylinder actuator of this utility model;

[0014] Figure 3 This is a three-dimensional schematic diagram of the servo electric cylinder actuator of this utility model;

[0015] Figure 4 This is a three-dimensional schematic diagram of the servo motor of this utility model;

[0016] Figure 5 This is an exploded view of the servo motor of this utility model.

[0017] In the diagram: 1. Servo electric cylinder actuator; 2. Electrode device; 3. Cylindrical guide rail; 4. Auxiliary components; 5. Mounting base; 101. Mounting flange; 102. Sealing flange; 103. Actuator end sealing chamber; 104. Servo motor end sealing chamber; 105. Servo motor; 106. Precision linear actuator; 107. Watertight connector; 108. Pressure gauge; 109. Shut-off valve; 110. Waterproof cable; 111. First sealing ring; 112. Guide rod sealing ring; 113. Second sealing ring; 114. Third sealing ring; 115. Guide rod end; 116. Second coupling; 11 7. Adapter flange; 118. Bell-shaped cover; 119. Servo motor adapter plate; 120. Watertight connector adapter plate; 121. Fourth sealing ring; 105-01. Servo motor main unit; 105-02. Connecting bracket; 105-03. Encoder; 105-04. Housing; 105-05. Rotor; 105-06. Inner housing; 105-07. Adapter plate; 105-08. First screw; 105-09. Adapter shaft; 105-10. First coupling; 105-11. Second screw; 105-12. Third screw; 105-13. Fourth screw. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figures 1 to 5As shown, the present invention provides a servo cylinder driven underwater EDM device, including a servo electric cylinder actuator 1 for underwater use. The bottom of the servo electric cylinder actuator 1 is fixedly connected to a mounting base 5. The bottom of the servo electric cylinder actuator 1 passes through the mounting base 5 and is fixedly connected to an electrode device 2. Cylindrical guide rails 3 are symmetrically arranged on the side of the mounting base 5 near the electrode device 2. The electrode device 2 is driven to move forward and backward and is guided by the cylindrical guide rails 3. An auxiliary component 4 is arranged on the top of the mounting base 5.

[0020] The servo electric cylinder actuator 1 includes a mounting flange 101, a sealing flange 102 on the surface of the mounting flange 101, and an actuator end sealing chamber 103 on the other side of the sealing flange 102. The actuator end sealing chamber 103 is fixedly connected to the mounting flange 101 and the sealing flange 102 by bolts. A servo motor end sealing chamber 104 is fixedly connected to the other end of the actuator end sealing chamber 103. A servo motor 105 is installed inside the servo motor end sealing chamber 104, and a precision linear actuator 106 is installed at the output end of the servo motor 105. A watertight connector 107 is electrically connected to the other end of the servo motor end sealing chamber 104. A pressure gauge 108 and a shut-off valve 109 are respectively installed on the surface of the servo motor end sealing chamber 104. The actuator end sealing chamber 103, the servo motor end sealing chamber 104, and the servo motor end sealing chamber 104 are connected to the actuator end sealing chamber 104. Compressed air is introduced into the sealed space through the shut-off valve 109 to maintain positive pressure in the sealed space, thereby preventing external water from entering the sealed space and avoiding damage to the precision linear actuator 106 and servo motor 105. The pressure gauge 108 value can be observed with an underwater camera to monitor the sealing condition in the sealed space. The surface of the watertight connector 107 is provided with a waterproof cable 110 for use with it. The waterproof cable 110 is connected to the external control power supply. The cable of the servo motor 105 and the control cable of the rotary encoder are led out of the servo motor end sealed space 104 through the watertight connector 107 and connected to the control power supply through the waterproof cable 110. The servo motor 105 shaft integrates an incremental encoder to detect the electrode cutting depth and real-time position.

[0021] The servo motor 105 includes a servo motor main unit 105-01. A connecting bracket 105-2 is mounted on the surface of the servo motor main unit 105-01. An encoder 105-3 is installed on the outer side of the connecting bracket 105-2. By rotating the encoder 105-3, the electrode machining depth can be measured in real time. The rear end of the servo motor main unit 105-01 is respectively provided with a tachogenerator housing 105-4, a rotor 105-5, and an inner housing 105-6. An adapter plate 105-7 is fixedly connected between the rotor 105-5 and the servo motor main unit 105-01. The gap between the electrode and the workpiece of the EDM device is controlled by the feedback of the tachogenerator to ensure machining accuracy and discharge efficiency. A first screw 105-8 is fixedly connected to the other end of the rotor 105-5. The surface of the encoder 105-3 is fixedly connected to the adapter shaft 105-9, and the other end of the adapter shaft 105-9 is fixedly connected to the first coupling 105-10. The first coupling 105-10 is used in conjunction with the central shaft of the servo motor host 105-01. The surface of the encoder 105-3 is provided with the second screw 105-11, and the second screw 105-11 is fixedly connected to the connecting bracket 105-2. The surface of the housing 105-4 is provided with the third screw 105-12, and the third screw 105-12 is fixedly connected to the adapter plate 105-7. The outer side of the connecting bracket 105-2 is provided with the fourth screw 105-13, and the fourth screw 105-13 is fixedly connected to the adapter plate 105-7. The problem of incompatibility between the servo motor 105 signal and the existing EDM power supply is solved by using a tachogenerator.

[0022] refer to Figure 2 A first sealing ring 111 is provided between the actuator end sealing chamber 103 and the servo motor end sealing chamber 104. A guide rod sealing ring 112 is fixedly connected to the surface of the precision linear actuator 106, and the guide rod sealing ring 112 works in conjunction with the actuator end sealing chamber 103. A second sealing ring 113 and a third sealing ring 114 are respectively provided between the actuator end sealing chamber 103 and the sealing flange 102, and between the sealing flange 102 and the mounting flange 101.

[0023] As a technical optimization of this utility model, by setting the first sealing ring 111, the guide rod sealing ring 112, the second sealing ring 113 and the third sealing ring 114, the various connections of the device can be sealed. When the pressure value of the pressure gauge 108 is too low, the underwater EDM device driven by the servo electric cylinder can be pulled out of the water. After replacing the first sealing ring 111, the guide rod sealing ring 112, the second sealing ring 113 and the third sealing ring 114, it can continue to be used.

[0024] refer to Figure 2A guide rod end 115 is provided on one side of the precision linear actuator 106, and the guide rod end 115 is used in conjunction with the sealing flange 102 through two sealing devices. The input end of the precision linear actuator 106 is fixedly connected to a second coupling 116. A transition flange 117 is sleeved on the surface of the second coupling 116. A bell-shaped cover 118 is provided on one side of the transition flange 117, and the bell-shaped cover 118 is located on the surface of the second coupling 116. A servo motor transition plate 119 is provided at the other end of the transition flange 117, and the servo motor transition plate 119 is used in conjunction with the servo motor 105.

[0025] As a technical optimization of this utility model, by setting up the guide rod end 115, the second coupling 116, the adapter flange 117, the bell-shaped cover 118 and the servo motor adapter plate 119, water is prevented from entering the actuator end sealing chamber 103 and the servo motor end sealing chamber 104, thereby enabling the servo motor 105 and the precision linear actuator 106 to be connected and ensuring their stable operation.

[0026] refer to Figure 2 A watertight connector adapter plate 120 is fitted on the surface of the watertight connector 107, and the watertight connector adapter plate 120 is fixedly connected to the servo motor end sealing chamber 104. A fourth sealing ring 121 is installed between the watertight connector adapter plate 120 and the servo motor end sealing chamber 104.

[0027] As a technical optimization of this utility model, the watertight connector adapter plate 120 and the fourth sealing ring 121 are provided to prevent water from entering the internal sealing space of the sealed servo motor end sealing chamber 104 in the working environment, thereby improving its sealing effect.

[0028] The working principle and usage process of this utility model are as follows: When using the underwater EDM device driven by the servo cylinder, the servo electric cylinder actuator 1 is installed and fixed on the positioning seat 5, driving the electrode device 2 to move forward and backward, guided by the cylindrical guide rail 3. Multiple sealing rings and waterproof joints are added to meet the requirements of underwater operation. Compressed air is introduced into the sealed space through the actuator end sealing chamber 103 and the servo motor end sealing chamber 104 via the shut-off valve 109, maintaining positive pressure within the sealed space to prevent external water from entering and thus avoiding damage to the precision linear actuator 106 and the servo motor 105. The pressure gauge 108 value can be observed using an underwater camera to monitor the sealing condition within the sealed space. If the pressure gauge... When the pressure value of 108 is too low, the underwater EDM device driven by the servo electric cylinder can be pulled out of the water. After replacing the corresponding sealing ring, it can continue to be used. The cable of the servo motor 105 and the control cable of the rotary encoder are led out of the outside of the servo motor end sealing chamber 104 through the watertight connector 107 and connected to the control power supply through the waterproof cable 110. The servo motor 105 shaft integrates an incremental encoder to detect the electrode cutting depth and real-time position. When used with an underwater vacuum cleaner and with the help of an underwater camera, it can handle the jamming of the control rod guide cylinder fastening bolts and realize the post-processing. At the same time, it only needs to be powered by electrical control and EDM power supply. It does not need to be equipped with expensive hydraulic servo valves, servo pump stations and hydraulic pipelines. In addition, the device has a small size, which meets the requirements of underwater confined working space.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A servo-cylinder driven underwater EDM device, comprising an underwater servo electric cylinder actuator (1), characterized in that: The bottom of the servo electric cylinder actuator (1) is fixedly connected to a mounting base (5). The bottom of the servo electric cylinder actuator (1) passes through the mounting base (5) and is fixedly connected to an electrode device (2). Cylindrical guide rails (3) are symmetrically arranged on the side of the mounting base (5) near the electrode device (2). An auxiliary component (4) is arranged on the top of the mounting base (5). The servo electric cylinder actuator (1) includes a mounting flange (101), a sealing flange (102) is provided on the surface of the mounting flange (101), and an actuator end sealing chamber (103) is provided on the other side of the sealing flange (102). The actuator end sealing chamber (103) is fixedly connected to the mounting flange (101) and the sealing flange (102) respectively by bolts. The other end of the actuator end sealing chamber (103) is fixedly connected to a servo motor end sealing chamber (104). A servo motor (105) is provided inside the servo motor end sealing chamber (104). A precision linear actuator (106) is provided at the output end of the servo motor (105). A watertight connector (107) is electrically connected to the other end of the servo motor end sealing chamber (104). A pressure gauge (108) and a shut-off valve (109) are respectively provided on the surface of the servo motor end sealing chamber (104). A waterproof cable (110) is provided on the surface of the watertight connector (107) for use with it. The servo motor (105) includes a servo motor host (105-01), a connecting bracket (105-2) mounted on the surface of the servo motor host (105-01), an encoder (105-3) disposed on the outer side of the connecting bracket (105-2), and a tachogenerator housing (105-4), a rotor (105-5), and an inner housing (105-6) respectively disposed at the rear end of the servo motor host (105-01). An adapter plate (105-7) is fixedly connected between the rotor (105-5) and the servo motor host (105-01). A first screw (105-8) is fixedly connected to the other end of the rotor (105-5), and an adapter shaft (105-8) is fixedly connected to the surface of the first screw (105-8). 9) The other end of the adapter shaft (105-9) is fixedly connected to a first coupling (105-10), and the first coupling (105-10) is used in conjunction with the central shaft of the servo motor host (105-01). The surface of the encoder (105-3) is provided with a second screw (105-11), and the second screw (105-11) is fixedly connected to the connecting bracket (105-2). The surface of the outer shell (105-4) is provided with a third screw (105-12), and the third screw (105-12) is fixedly connected to the adapter plate (105-7). The outer side of the connecting bracket (105-2) is provided with a fourth screw (105-13), and the fourth screw (105-13) is fixedly connected to the adapter plate (105-7).

2. The servo cylinder driven underwater EDM device according to claim 1, characterized in that: A first sealing ring (111) is provided between the actuator end sealing chamber (103) and the servo motor end sealing chamber (104). A guide rod sealing ring (112) is fixedly connected to the surface of the precision linear actuator (106), and the guide rod sealing ring (112) is used in conjunction with the actuator end sealing chamber (103). A second sealing ring (113) and a third sealing ring (114) are respectively provided between the actuator end sealing chamber (103) and the sealing flange (102), and between the sealing flange (102) and the mounting flange (101).

3. The servo cylinder driven underwater EDM device according to claim 1, characterized in that: The precision linear actuator (106) has a guide rod end (115) on one side, and the guide rod end (115) is used in conjunction with the sealing flange (102) through two sealing devices. The input end of the precision linear actuator (106) is fixedly connected to a second coupling (116). The surface of the second coupling (116) is fitted with an adapter flange (117). One side of the adapter flange (117) is provided with a bell-shaped cover (118), and the bell-shaped cover (118) is located on the surface of the second coupling (116). The other end of the adapter flange (117) is provided with a servo motor adapter plate (119), and the servo motor adapter plate (119) is used in conjunction with the servo motor (105).

4. The servo cylinder driven underwater EDM device according to claim 1, characterized in that: The surface of the watertight connector (107) is fitted with a watertight connector adapter plate (120), and the watertight connector adapter plate (120) is fixedly connected to the servo motor end sealing chamber (104). A fourth sealing ring (121) is installed between the watertight connector adapter plate (120) and the servo motor end sealing chamber (104).

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