Electrolytic machining device and electrolytic machining method for cavity structure of bimetal laminated plate workpiece

Abstract

The invention discloses an electrolytic machining device and an electrolytic machining method for a bimetal laminated plate workpiece cavity structure. The electrochemical machining device comprises a first tool cathode and a second tool cathode; a vertical rotary feed shaft; a rotating platform assembly; and a catch tank. The electrolytic machining method is executed through the electrolytic machining device, and during machining, the two tool cathodes axially and oppositely move towards the bimetal laminated plate workpiece at different feeding speeds from the initial position so as to machine the two sides of the bimetal laminated plate workpiece at the same time; the next channel can be machined by rotating the workpiece around the axis of the workpiece by a certain angle, or the channel on the lower side can be machined by rotating the workpiece around the vertical rotary feeding shaft by 180 degrees, and therefore continuous machining of the multiple cavities of the rotary workpiece is achieved. According to the electrolytic machining device and the electrolytic machining method, the problem that a clamp needs to be frequently disassembled and assembled during electrolytic machining of an existing cavity structure is solved, the machining time consumption is reduced, and the machining efficiency and the machining precision are improved.

Description

Technical Field

[0001] The present invention generally relates to the technical field of electrolytic machining, and more specifically, to an electrolytic machining device and an electrolytic machining method for a bimetallic laminate workpiece cavity structure. Background Art

[0002] Bimetallic layered composite plates such as titanium / steel composite plates and steel / aluminum composite plates combine the advantages of two different metal materials, achieving performance requirements that cannot be met by a single material. They are widely used in key components in important fields such as aerospace, petrochemicals, and marine engineering.

[0003] These key parts are distributed with some cavity structures, which need to take into account processing quality and processing efficiency at the same time. At present, the main processing methods for the cavity structure of bimetallic layered composite plates are mechanical processing, electrospark forming processing, laser processing, etc. For difficult-to-process materials such as titanium / aluminum composite plates and titanium / steel composite plates, deep and narrow cavities, and complex curved cavities, mechanical processing has problems such as difficult chip removal, low processing efficiency, and local residual stress.

[0004] Methods such as electrospark forming and laser processing have processing defects such as recast layer and heat-affected zone on the surface of the forming cavity. Electrolytic machining has become the preferred processing technology for the cavity structure of bimetallic layered composite plates due to its advantages such as wide range of machinable materials, no residual stress and heat-affected zone on the workpiece surface, high processing efficiency and no tool loss.

[0005] The current electrolytic machining device needs to continuously dismantle and install fixtures during the machining process, which affects the machining accuracy and efficiency. It is not suitable for machining bimetallic laminate material workpieces with two metal materials and has low machining accuracy.

[0006] Therefore, the current electrolytic machining devices and electrolytic machining methods have the problems of low machining efficiency, low machining accuracy of the bimetallic laminate cavity, poor end surface machining quality, and the need to disassemble and assemble the tooling during the machining process. Therefore, it is urgent to design a bimetallic laminate workpiece cavity structure electrolytic machining device and electrolytic machining method to solve the above problems. Summary of the invention

[0007] In view of this, the present invention provides an electrolytic machining device and an electrolytic machining method for a bimetallic laminate workpiece cavity structure to solve the problems of low machining accuracy, insufficient automation and long machining time in the existing electrolytic machining devices and methods.

[0008] To achieve the above-mentioned object, the present invention provides a bimetallic laminate workpiece cavity structure electrolytic machining device, which comprises:

[0009] a first tool cathode and a second tool cathode, wherein the first tool cathode and the second tool cathode are located on different horizontal planes, each of the first tool cathode and the second tool cathode comprises a base, a tool handle, a tool head, a first component and a second component, wherein the tool head and the base are respectively connected to the front end and the rear end of the tool handle, the second component is connected to the top end of the base and is configured to form a hollow cavity for electrolyte to flow through and a liquid outlet for the electrolyte to be ejected together with the first component during the electrolytic machining of the bimetallic laminate workpiece, the tool head of the first tool cathode and the tool head of the second tool cathode are configured to face respectively during the electrolytic machining process On opposite sides of the bimetallic laminate workpiece, the liquid outlet of the first tool cathode is configured to spray the electrolyte to the gap between the tool head of the first tool cathode and the bimetallic laminate workpiece during the electrolytic machining process, and the liquid outlet of the second tool cathode is configured to spray the electrolyte to the gap between the tool head of the second tool cathode and the bimetallic laminate workpiece during the electrolytic machining process; a first horizontal rotary feed shaft and a second horizontal rotary feed shaft, the front end of the first horizontal rotary feed shaft and the front end of the second horizontal rotary feed shaft are respectively connected to the base of the first tool cathode and the second tool cathode and the base;

[0010] a vertical rotary feed shaft, the lower end of the vertical rotary feed shaft being configured for rotatably connecting with the bimetallic laminate workpiece;

[0011] a rotating platform assembly configured to connect the bimetallic laminate workpiece during the electrolytic machining process and to drive the bimetallic laminate workpiece to rotate about its own axis to a next machining position in response to the tool head of the first tool cathode and the tool head of the second tool cathode all being retracted to their initial positions when no electrolytic machining is performed; and

[0012] A sump is configured to contain the electrolyte and the bimetallic laminate workpiece during the electrochemical machining process, and the rotating platform assembly and the tool head are located in the sump.

[0013] Optionally, the bimetallic laminate workpiece cavity structure electrolytic machining device also includes a pulse power supply; the rear ends of the first horizontal rotary feed shaft and the second horizontal rotary feed shaft are respectively connected to a first motor and a second motor, and the first motor and the second motor are respectively connected to the negative pole of the pulse power supply through a first wire and a second wire; and the upper end of the vertical rotary feed shaft is connected to a third motor, and the third motor is connected to the positive pole of the pulse power supply through a third wire.

[0014] Optionally, a first ammeter and a first switch are sequentially provided on the first conductor, and the first ammeter is used to detect the current of the first tool cathode during the electrolytic machining process; and a second ammeter and a second switch are sequentially provided on the second conductor, and the second ammeter is used to detect the current of the second tool cathode during the electrolytic machining process.

[0015] Optionally, the tool head is provided with a position sensor for sensing its own position; the rotating platform assembly includes a controller, a fourth motor electrically connected to the controller, and a platform integrated with the output shaft of the fourth motor, the controller is communicatively connected to the position sensor, and the platform is configured to connect the bimetallic laminate workpiece and drive the bimetallic laminate workpiece to rotate during the electrolytic machining process, wherein the controller is configured to rotate the output shaft of the fourth motor in response to an electrical signal output by the position sensor indicating that the tool head has retreated to the initial position, thereby driving the platform to rotate.

[0016] Optionally, under the control of the controller, each rotation of the platform causes the bimetallic laminate workpiece to rotate by an angle of 360° / n, wherein n is the total number of channels predetermined to be processed in one side of the bimetallic laminate workpiece.

[0017] Optionally, the bimetallic laminate workpiece cavity structure electrolytic machining device also includes an electrolyte circulation system; the hollow cavity of the first tool cathode and the hollow cavity of the second tool cathode are respectively connected to the electrolyte circulation system through an electrolyte inlet pipe; and an electrolyte outflow hole is opened on the upper part of the side wall of the liquid collecting tank, and the electrolyte outflow hole is connected to the electrolyte circulation system through an electrolyte outflow pipe.

[0018] Optionally, the axis of the first horizontal rotary feed shaft and the axis of the second horizontal rotary feed shaft are not colinear.

[0019] Optionally, the bimetallic laminate workpiece cavity structure electrolytic machining device also includes a fixture, which is mounted on a transverse axis extending laterally from the lower end of the vertical rotating feed axis, and the fixture is configured to be located between the rotating platform assembly and the bimetallic laminate workpiece during the electrolytic machining process and to be connected to the rotating platform assembly and the bimetallic laminate workpiece respectively.

[0020] Optionally, the knife handle can be moved forward and backward through the side wall of the liquid collecting trough, the side wall of the liquid collecting trough is provided with an installation hole, the first component passes through the installation hole and is fixed to the side wall of the liquid collecting trough, and the second component can be moved forward and backward through the installation hole; wherein the cross-sections of the first component and the second component are both L-shaped, and the bending portion of the first component extends beyond the knife head by a distance of 1 to 2 mm.

[0021] In addition, the present invention also provides a method for electrolytic machining of a bimetallic laminate workpiece cavity structure, which uses the above-mentioned bimetallic laminate workpiece cavity structure electrolytic machining device to perform the following steps:

[0022] Step 1: placing the bimetallic laminate workpiece at a designated position in the liquid collecting tank to connect with the rotating platform assembly, turning on the electrolyte circulation system and the pulse power supply in sequence, and turning on the first switch and the second switch, so that the tool head of the first tool cathode and the tool head of the second tool cathode move from their respective initial positions at different feed speeds and different initial gaps between their respective corresponding sides of the bimetallic laminate workpiece in the axial direction toward the opposite sides of the bimetallic laminate workpiece, respectively, so as to simultaneously process the first metal plate and the second metal plate of the bimetallic laminate workpiece, respectively, wherein when the values ​​of each of the first ammeter and the second ammeter suddenly change, disconnecting the first switch and the second switch, so that the tool head of the first tool cathode and the tool head of the second tool cathode are all retracted to their corresponding initial positions;

[0023] Step 2: After the tool head of the first tool cathode and the tool head of the second tool cathode are all returned to their corresponding initial positions, the electrolyte circulation system is turned off, and the rotating platform assembly drives the bimetallic laminate workpiece to rotate around its own axis to the next processing position in response to the tool head of the first tool cathode and the tool head of the second tool cathode being all returned to their corresponding initial positions;

[0024] Step 3: Repeat step 1 and step 2 until all the predetermined processing positions of the bimetallic laminate workpiece are processed, then close the electrolyte circulation system, and rotate the vertical rotary feed shaft around its own axis to drive the bimetallic laminate workpiece to rotate 180° around the vertical rotary feed shaft, thereby obtaining a semi-finished workpiece;

[0025] Step 4: starting the electrolyte circulation system, so that the tool head of the first tool cathode and the tool head of the second tool cathode move from their respective initial positions in the axial direction toward the opposite sides of the bimetallic laminate workpiece at different feed speeds and different initial gaps between them and the corresponding sides of the bimetallic laminate workpiece, so as to process the second metal plate and the first metal plate respectively, until the processed channels are connected with the corresponding channels processed in the step 1, and then the tool head of the first tool cathode and the tool head of the second tool cathode are returned to their respective initial positions; and

[0026] Step 5: Repeat step 2 and step 4 until each of the processed channels is connected with the corresponding channel processed in step 1 to form a cavity structure, and then turn off the pulse power supply and the electrolyte circulation system in turn to obtain a finished workpiece.

[0027] Compared with the prior art, the electrolytic machining device and electrolytic machining method of the bimetallic laminate workpiece cavity structure provided by the present invention have the following beneficial effects:

[0028] (1) The electrolytic machining device and method for the bimetallic laminate workpiece cavity structure of the present invention can realize the coordinated movement of the first tool cathode and the second tool cathode with the bimetallic laminate workpiece during the machining process, and there is no additional electrolytic machining fixture constraint, so that after completing the machining of one channel or one side channel, the bimetallic laminate workpiece can be rotated around its own axis by a certain angle to start the machining of the next channel, or the bimetallic laminate workpiece can be rotated 180° around the vertical rotary feed axis to start the machining of the next side channel, thereby realizing the continuous machining of multiple cavities of the rotating workpiece, thereby overcoming the problem that the current electrolytic machining of the cavity structure requires frequent disassembly and installation of the fixture, reducing the machining time, and improving the machining efficiency and machining accuracy.

[0029] (2) The bimetallic laminate workpiece cavity structure electrolytic machining device and electrolytic machining method of the present invention are provided with a hollow cavity in the area of ​​the tool cathode where the tool head is not located, and the extended area where the bent portion of the first component is located is provided with a liquid outlet connected to the hollow cavity so that the electrolyte in the hollow cavity can be sprayed out from the liquid outlet at high speed to the gap between the tool head of the tool cathode and the bimetallic laminate workpiece, thereby removing the electrolytic products in the machining area, avoiding the problem of poor machining accuracy of the electrolytically formed cavity end face caused by the liquid outlet being located at the front end face of the tool head of the tool cathode in traditional cavity structure electrolytic machining, thereby further improving the machining accuracy.

[0030] (3) The electrolytic machining device and method for the bimetallic laminate workpiece cavity structure of the present invention have two tool cathodes that move axially and toward the bimetallic laminate workpiece from initial positions at different horizontal planes at different feed speeds to respectively and simultaneously machine the first metal plate and the second metal plate on both sides of the bimetallic laminate workpiece. The two tool cathodes do not interfere with each other during machining, thus overcoming the problem that when electrolytic machining the bimetallic laminate workpiece cavity structure using the current method, the cavity contour obtained is different from the expected contour and the contour quality is poor due to different electrochemical dissolution rates in different areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solution of the present invention, the embodiments of the present invention will be further illustrated and described according to the following drawings, which are only used to more conveniently and specifically describe the embodiments of the present invention rather than to limit the present invention. In the drawings:

[0032] Figure 1 is a schematic diagram of the overall structure of a bimetallic laminate workpiece cavity structure electrolytic machining device provided with a bimetallic laminate workpiece according to an exemplary embodiment of the present invention;

[0033] Figure 2 is a schematic diagram of a tool cathode of an electrolytic machining device for a bimetallic laminate workpiece cavity structure provided according to an exemplary embodiment of the present invention;

[0034] Figure 3 is a schematic diagram of electrolyte flow during electrolytic machining of a bimetallic laminate workpiece cavity structure electrolytic machining device provided in accordance with an exemplary embodiment of the present invention;

[0035] Figure 4 is a schematic diagram of a structure involved in electrolytic processing of a bimetallic laminate workpiece provided according to an exemplary embodiment of the present invention until a semi-finished workpiece is obtained;

[0036] Figure 5 is a schematic diagram of a semi-finished workpiece prepared by a method for electrolytic machining of a bimetallic laminate workpiece cavity structure according to an exemplary embodiment of the present invention;

[0037] Figure 6 is a schematic diagram of the structure involved in further electrolytic processing of the semi-finished workpiece until a finished workpiece is obtained; and

[0038] Figure 7 It is a schematic diagram of a finished workpiece prepared by the electrolytic machining method of a bimetallic laminate workpiece cavity structure provided according to an exemplary embodiment of the present invention.

[0039] In the figure: 1, first tool cathode; 2, second tool cathode; 3, bimetallic laminate workpiece; 4, first horizontal rotary feed shaft; 5, second horizontal rotary feed shaft; 6, vertical rotary feed shaft; 7, fixture; 8, liquid collecting tank; 9, rotating platform assembly; 10, pulse power supply; 11, electrolyte inlet pipe; 12, electrolyte outlet pipe; 13, liquid outlet of second tool cathode; 14, electrolyte outlet hole; 15, base; 16, tool handle; 17, tool head; 181, first component; 182, second component; 19, the distance that the bending portion of the first component extends beyond the tool head; 20, hollow cavity ; 21. The liquid outlet of the first tool cathode; 22. The axis of the first horizontal rotary feed shaft; 23. The axis of the second horizontal rotary feed shaft; 24. The first switch; 25. The second switch; 26. The first metal plate; 27. The second metal plate; 28. The electrolyte; 29. ​​The first ammeter; 30. The second ammeter; 31. The axis of the vertical rotary feed shaft; 32. The channel processed in step one; 33. The semi-finished workpiece; 34. The finished workpiece; 35. The axis of the bimetallic laminate workpiece; 36. The electrolyte circulation system; 37. The machine tool base; 38. The machine tool frame; 39. The base of the liquid collecting tank. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the specific embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. These embodiments are provided by way of example only. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are also within the scope of protection claimed by the present invention.

[0041] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0042] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0043] refer to Figures 1 to 7 The embodiments of the present invention provide a bimetallic laminate workpiece cavity structure electrolytic machining device and electrolytic machining method. The details of the bimetallic laminate workpiece cavity structure electrolytic machining device and electrolytic machining method are described below in conjunction with the accompanying drawings.

[0044] Figure 1 The overall structure of the electrolytic machining device for the bimetallic laminate workpiece cavity structure with the bimetallic laminate workpiece 3 is shown. Figure 1 As shown, the bimetallic laminate workpiece cavity structure electrolytic machining device generally comprises: a first tool cathode 1, a second tool cathode 2, a first horizontal rotary feed shaft 4, a second horizontal rotary feed shaft 5, a vertical rotary feed shaft 6, a liquid collecting tank 8 and a rotary platform assembly 9. The first tool cathode 1 and the second tool cathode 2 are located on different horizontal planes.

[0045] Figure 2 The specific structure of two tool cathodes 1 and 2 is shown. Figure 2As shown, each of the first tool cathode 1 and the second tool cathode 2 includes a base 15, a tool handle 16, a tool head 17, a first component 181 and a second component 182, and the material can preferably be copper-tungsten alloy. Except for the tool head 17, the base 15, the tool handle 16, the first component 181 and the second component 182 are all coated with an insulating layer, and the insulating layer material is alumina ceramic; the tool head 17 and the base 15 are respectively connected to the front and rear ends of the tool handle 16; the second component 182 is connected to the top of the base 15 and is configured to form a hollow cavity 20 for the electrolyte 28 to flow through and a hollow cavity 20 for the electrolyte 28 to flow through together with the first component 181 during the electrolytic machining of the bimetallic laminate workpiece 3. The electrolyte 28 is sprayed out of the liquid outlet (for example, a narrow groove or a circular hole) 21, 13; the tool head 17 of the first tool cathode 1 and the tool head 17 of the second tool cathode 2 are configured to face the opposite sides (i.e., two opposite surfaces) of the bimetallic laminate workpiece 3 during electrolytic machining; the liquid outlet 21 of the first tool cathode 1 is configured to spray the electrolyte 28 into the gap between the tool head 17 of the first tool cathode 1 and the bimetallic laminate workpiece 3 during electrolytic machining; and the liquid outlet 13 of the second tool cathode 2 is configured to spray the electrolyte 28 into the gap between the tool head 17 of the second tool cathode 1 and the bimetallic laminate workpiece 3 during electrolytic machining.

[0046] Combine the following Figure 1 and Figure 2 To describe the connection and functional relationship between the above components. Figure 1 As shown, the front end of the first horizontal rotary feed shaft 4 and the front end of the second horizontal rotary feed shaft 5 are connected to the base 15 of the first tool cathode 1 and the second tool cathode 2 and the base 15, respectively. The lower end of the vertical rotary feed shaft 6 is configured to be rotatably connected to the bimetallic laminate workpiece 3. The rotating platform assembly 9 is configured to connect the bimetallic laminate workpiece 3 during electrolytic machining, and in response to the tool head 17 of the first tool cathode 1 and the tool head 17 of the second tool cathode 2 all retreating to their initial positions when electrolytic machining is not performed, the bimetallic laminate workpiece 3 is driven to rotate around its own axis 35 to the next machining position. The sump 8 is configured to contain the electrolyte 28 and the bimetallic laminate workpiece 3 during electrolytic machining; the rotating platform assembly 9 and the tool head 17 are located in the sump 8.

[0047] In a preferred embodiment of the present invention, the bimetallic laminate workpiece 3 is a body of revolution and includes a first metal plate 26 composed of a first metal and a second metal plate 27 composed of a second metal different from the first metal, as will be described below. Figure 3 shown.

[0048] Figure 3 The flow of electrolyte in the electrolytic machining process of the bimetallic laminate workpiece cavity structure electrolytic machining device is described. Figure 3 Shown and combined Figure 2 In a preferred embodiment of the present invention, the electrolytic machining device for the bimetallic laminate workpiece cavity structure further includes an electrolyte circulation system 36; the hollow cavity 20 of the first tool cathode 1 and the hollow cavity 20 of the second tool cathode 2 are respectively connected to the electrolyte circulation system 36 through the electrolyte inlet pipe 11; and an electrolyte outflow hole 14 is opened on the upper part of the side wall of the liquid collecting tank 8, and the electrolyte outflow hole 14 is connected to the electrolyte circulation system 36 through the electrolyte outflow pipe 12. During the electrolytic machining process, the electrolyte 28 flows through the electrolyte inlet pipe 11 and the hollow cavity 20 in sequence, and is ejected at high speed from the liquid outlets 21 and 13 in the extension area where the bending portion of the first component 181 is located to the gap between the tool head 17 and the bimetallic laminate workpiece 3, taking away the electrolytic products in the machining area, and merging into the liquid collecting tank 8. When the electrolyte in the liquid collecting tank 8 increases to a level greater than the electrolyte outflow hole 14 , the electrolyte 28 flows out from the electrolyte outflow hole 14 and flows along the electrolyte outflow pipe 12 to the electrolyte circulation system 36 .

[0049] In a preferred embodiment of the present invention, the electrolyte circulation system 36 may include a clear liquid tank and a turbid liquid tank. The electrolyte 28 flows out of the clear liquid tank, enters the processing area through the hollow cavity 20 and the liquid outlets 21 and 13 to take away the electrolysis products, etc.; then when the electrolyte in the liquid collecting tank 8 increases to a height greater than the electrolyte outflow hole 14, the electrolyte 28 flows out of the electrolyte outflow hole 14 and flows back to the turbid liquid tank. A filtering system is provided between the turbid liquid tank and the clear liquid tank, so that the turbid electrolyte in the turbid liquid tank is filtered by the filtering system to obtain clean electrolyte and flow into the clear liquid tank.

[0050] In a preferred embodiment of the present invention, the bimetallic laminate workpiece cavity structure electrolytic machining device further comprises a pulse power supply 10. Regarding the power supply of the pulse power supply 10 to each driving component, reference can be made to the following description. Figure 4 and Figure 6 ,exist Figure 4 The bimetallic laminate workpiece 3 is electrolytically processed until it is obtained. Figure 5 The structure of the semi-finished workpiece 33 shown in FIG. Figure 6 The semi-finished workpiece 33 is shown to be further electrolytically processed until the Figure 7 The structure involved in the finished workpiece 34 shown in FIG. Figure 1 Shown and combined Figure 4 and Figure 6The rear end of the first horizontal rotating feed shaft 4 and the rear end of the second horizontal rotating feed shaft 5 are respectively connected to the first motor and the second motor, which are respectively connected to the negative pole of the pulse power supply 10 through the first wire and the second wire, so that the first motor drives the first horizontal rotating feed shaft 4 to rotate and move forward and / or backward, and the second motor drives the second horizontal rotating feed shaft 5 to rotate and move forward and / or backward; and the upper end of the vertical rotating feed shaft 6 is connected to the third motor, and the third motor is connected to the positive pole of the pulse power supply 10 through the third wire, so that the third motor drives the vertical rotating feed shaft 6 to rotate and move forward and / or backward. Regarding the connection between the pulse power supply 10 and the above-mentioned motors, it should be noted that, for example, Figure 1 As shown, in this embodiment, the wire is connected to the feed shaft instead of being strictly connected to the motor corresponding to the feed shaft, only for the convenience of illustration and without distorting other understandings of the connection method between the above-mentioned pulse power supply 10 and each motor.

[0051] Preferably, the entire electrolytic machining device can be placed in a machine tool, such as Figure 1 As shown, the machine tool may include a machine tool base 37 and a machine tool frame 38. The machine tool base 37 may be arranged at the bottom of the electrolytic machining device as a support member of the entire electrolytic machining device, and a liquid collecting tank base 39 with a pulley may be further arranged on the machine tool base 37 to facilitate the support and movement of the liquid collecting tank 8; the first motor, the second motor and the third motor may all be arranged in the machine tool frame 38 or connected to the machine tool frame 38 through an intermediate member. In addition, the first horizontal rotary feed shaft 4, the second horizontal rotary feed shaft 5 and the vertical rotary feed shaft 6 may be the output shafts of the first motor, the second motor and the third motor, respectively, or may be connecting shafts connected to the output shafts of the first motor, the second motor and the third motor, respectively.

[0052] In a preferred embodiment of the present invention, for example, Figure 4 As shown, the first conductor is provided with a first ammeter 29 and a first switch 24 in sequence; preferably, the first ammeter 29 is located between the negative pole of the pulse power supply 10 and the first switch 24; the first ammeter 29 is used to detect (for example, by reading the value of the first ammeter 29 to detect) the current of the first tool cathode 1 during the electrolytic machining process; and the second conductor is provided with a second ammeter 30 and a second switch 25 in sequence; preferably, the second ammeter 30 is located between the negative pole of the pulse power supply 10 and the second switch 25; the second ammeter 30 is used to detect the current of the second tool cathode 2 during the electrolytic machining process. In the present invention, the pulse power supply 10 is selected as the power supply, which can be more conducive to the discharge of the electrolytic product and the machining effect (surface quality and machining accuracy) is better.

[0053] In a preferred embodiment of the present invention, the cutter head 17 may be provided with a position sensor (not shown) for sensing its own position; the rotating platform assembly 9 may include a controller (not shown), a fourth motor electrically connected to the controller, and a platform integrated with the output shaft of the fourth motor, the controller is connected to the position sensor for communication, and the platform is configured to connect the bimetallic laminate workpiece 3 and drive the bimetallic laminate workpiece 3 to rotate during the electrolytic machining process, wherein the controller is configured to rotate the output shaft of the fourth motor in response to the electrical signal output by the position sensor indicating that the cutter head 17 has returned to the initial position, thereby driving the platform to rotate. The fourth motor may be a wireless motor (powering the motor wirelessly), or a power supply battery may be built in. Regarding the types of controllers and position sensors and the communication connection method between them, this embodiment does not make any special restrictions, and conventional controllers, position sensors (e.g., contact sensors or proximity sensors) and the communication method between them in the art may be used, as long as it can be ensured that the controller can control the output shaft of the fourth motor to rotate in response to the electrical signal indicating the position output by the position sensor.

[0054] In a preferred embodiment of the present invention, under the control of the controller, the platform rotates once to rotate the bimetallic laminate workpiece 3 by an angle of 360° / n, where n is the total number of channels predetermined to be processed in one side of the bimetallic laminate workpiece 3. A circle of positioning holes may be provided on the bimetallic laminate workpiece 3, with each channel corresponding to a positioning hole.

[0055] In a preferred embodiment of the present invention, the axis 22 of the first horizontal rotary feed shaft 4 and the axis 23 of the second horizontal rotary feed shaft 5 are not collinear.

[0056] In a preferred embodiment of the present invention, the bimetallic laminate workpiece cavity structure electrolytic machining device further comprises a fixture 7. Figure 1 As shown, the fixture 7 can be sleeved on a transverse axis extending laterally from the lower end of the vertical rotary feed shaft 6, and the fixture 7 is configured to be located between the rotary platform assembly 9 and the bimetallic laminate workpiece 3 during the electrolytic machining process and to be connected to the rotary platform assembly 9 and the bimetallic laminate workpiece 3 respectively. The fixture 7 can be connected to the rotary platform assembly 9 and the bimetallic laminate workpiece 3 in a conventional manner using locating pins and fasteners (e.g., bolts, screws, etc.).

[0057] In a preferred embodiment of the present invention, for example, Figures 1 to 3As shown in the figure, the tool handle 16 can be moved forward and backward through the side wall of the liquid collecting tank 8, and the side wall of the liquid collecting tank 8 is provided with a placement hole. The first component 181 passes through the placement hole and is fixed to the side wall of the liquid collecting tank 8, and the second component 182 can be moved forward and backward through the placement hole; wherein, the cross-sections of the first component 181 and the second component 182 are both L-shaped; the bending portion of the first component 181 extends beyond the tool head 17 by a distance 19 of 1 to 2 mm. Selecting the distance 19 within this distance range can be more conducive to the ejected electrolyte taking away the electrolysis products in the processing area, and is more conducive to improving the processing accuracy of the cavity end face and the cavity contour quality.

[0058] In addition, by using the above-mentioned bimetallic laminate workpiece cavity structure electrolytic machining device, a preferred embodiment of the present invention also provides a bimetallic laminate workpiece cavity structure electrolytic machining method, which may include the following steps 1 to 5. Figures 1 to 7 The above structure is still applicable to the electrolytic machining method. For example, Figure 4 The structure involved in step 1 to step 3 in the electrolytic machining method is shown. Figure 5 shows the semi-finished workpiece prepared in step three of the electrolytic machining method, Figure 6 The structure involved in step 4 of the electrolytic machining method is shown, and Figure 7 The finished workpiece prepared in step 5 of the electrolytic machining method is shown. Figures 1 to 7 , the electrolytic machining method may include:

[0059] Step 1: Place the bimetallic laminate workpiece 3 at a designated position in the liquid collecting tank 8 to connect with the rotating platform assembly 9, turn on the electrolyte circulation system 36 and the pulse power supply 10 in sequence, and turn on the first switch 24 and the second switch 25, so that the tool head 17 of the first tool cathode 1 and the tool head 17 of the second tool cathode 2 move from their respective initial positions at different feed speeds and different initial gaps between their respective corresponding sides of the bimetallic laminate workpiece 3 in the axial direction toward the opposite sides of the bimetallic laminate workpiece 3, so as to simultaneously process the first metal plate 26 and the second metal plate 27 of the bimetallic laminate workpiece 3, respectively, wherein when the values ​​of each of the first ammeter 29 and the second ammeter 30 suddenly change, disconnect the first switch 24 and the second switch 25, so that the tool head 17 of the first tool cathode 1 and the tool head 17 of the second tool cathode 2 are all retracted to their corresponding initial positions;

[0060] Step 2: After the tool heads 17 of the first tool cathode 1 and the tool heads 17 of the second tool cathode 2 are all returned to their corresponding initial positions, the electrolyte circulation system 36 is turned off, and the rotating platform assembly 9 drives the bimetallic laminate workpiece 3 to rotate around its own axis 35 to the next processing position in response to the tool heads 17 of the first tool cathode 1 and the tool heads 17 of the second tool cathode 2 being all returned to their corresponding initial positions;

[0061] Step 3: Repeat steps 1 and 2 until all the predetermined processing positions of the bimetallic laminate workpiece 3 are processed, then close the electrolyte circulation system 36, and rotate the vertical rotary feed shaft 6 around its own axis 31 to drive the bimetallic laminate workpiece 3 to rotate 180° around the vertical rotary feed shaft 6, thereby obtaining a semi-finished workpiece 33, as shown in FIG. Figure 5 As shown;

[0062] Step 4: start the electrolyte circulation system 36, so that the cutter head 17 of the first tool cathode 1 and the cutter head 17 of the second tool cathode 2 move from their respective initial positions in the axial direction toward the opposite sides of the bimetallic laminate workpiece 3 at different feed speeds and different initial gaps between them and the corresponding sides of the bimetallic laminate workpiece 3, so as to process the second metal plate 27 and the first metal plate 26 respectively, until the processed channels are connected with the corresponding channels 32 processed in step 1, and then the cutter head 17 of the first tool cathode 1 and the cutter head 17 of the second tool cathode 2 are returned to their respective initial positions; and

[0063] Step 5: Repeat steps 2 and 4 until each of the processed channels is connected with the corresponding channel 32 processed in step 1 to form a cavity structure, and then turn off the pulse power supply 10 and the electrolyte circulation system 36 in turn, thereby obtaining a finished workpiece 34, such as Figure 7 shown.

[0064] In a preferred embodiment of the present invention, the feed speeds of the tool head 17 of the first tool cathode 1 and the tool head 17 of the second tool cathode 2 in step one, step two and step four are different, but can be in the range of 0.0 to 2.0 mm / min; the speed at which they each return to the initial position can be in the range of 10.0 to 50.0 mm / min; the initial gaps between them and the corresponding sides of the bimetallic laminate workpiece 3 are different, but can be in the range of 0.00 to 1.50 mm; the electrolyte 28 can be selected from sodium nitrate or sodium chloride solution; the flow rate of the electrolyte 28 at the liquid outlets 21 and 13 of the tool cathodes 1 and 2 can be in the range of 0.0 to 50.0 L / h; the temperature of the electrolyte 28 can be 0 to 50°C.

[0065] In a preferred embodiment of the present invention, during the electrolytic machining process, the first tool cathode 1, the second tool cathode 2 and the bimetallic laminate workpiece 3 can be completely immersed in the electrolyte 28. During the electrolytic machining process, the first tool cathode 1, the second tool cathode 2 and the bimetallic laminate workpiece 3 are free of additional electrolytic machining fixture constraints, and complex coordinated movements can be achieved to adapt to the twisted cavity.

[0066] In the electrolytic machining process in step 1, since the first tool cathode 1 and the second tool cathode 2 process two metal plates of different materials, and the thickness and solubility of the metal plates are also different, the following three situations may occur (but these three situations will not occur at the same time):

[0067] Case 1: when the value of the first ammeter 29 changes suddenly, the first switch 24 is disconnected, so that the cutter head 17 of the first tool cathode 1 returns to its initial position, and the cutter head 17 of the second tool cathode 2 continues to feed until the value of the second ammeter 30 changes suddenly, then the second switch 25 is disconnected, so that the cutter head 17 of the second tool cathode 2 returns to its initial position;

[0068] Case 2: When the value of the second ammeter 30 changes suddenly, the second switch 25 is disconnected, so that the cutter head 17 of the second tool cathode 2 returns to its initial position, and the cutter head 17 of the first tool cathode 1 continues to feed until the value of the first ammeter 29 changes suddenly, then the first switch 24 is disconnected, so that the cutter head 17 of the first tool cathode 1 returns to its initial position;

[0069] Case 3: When the values ​​of each of the first ammeter 29 and the second ammeter 30 suddenly change, the first switch 24 and the second switch 25 are disconnected, so that the tool head 17 of the first tool cathode 1 and the tool head 17 of the second tool cathode 2 all return to their corresponding initial positions.

[0070] In addition, the first tool cathode 1 and the second tool cathode 2 in step 1 and step 4 can be fed and rotated in the axial direction during the electrolytic machining process; the bimetallic laminate workpiece 3 can be fed and rotated in the vertical direction at a variable speed; the first tool cathode 1 and the second tool cathode 2 move in coordination with the bimetallic laminate workpiece 3 during the electrolytic machining process. The variable speed feeding of the bimetallic laminate workpiece 3 in the vertical direction can be achieved by selecting the third motor connected to the vertical rotary feed shaft 6 as a servo motor, but the present embodiment is not limited thereto, and other motors in the art can also be selected to achieve it, as long as it can ensure the variable speed feeding in the vertical direction.

[0071] It should be understood that the drawings in the embodiments of the present invention only relate to structures related to the embodiments of the present invention, and other structures can refer to the general design. The devices and / or structures in the various embodiments provided in the present invention can be combined, modified and / or changed to form new technical solutions. In the absence of creative work, these technical solutions should also be included in the scope of protection claimed by the present invention.

[0072] A large number of specific examples are provided in the embodiments provided herein, and it should be understood that these examples are only for detailed description of the embodiments of the present invention and are not intended to limit the present invention. The embodiments of the present invention can be practiced without these specific examples. In some embodiments, structures and / or technologies known to those skilled in the art are not shown in detail so as not to obscure the understanding of the present invention.

[0073] Although preferred embodiments of the present invention have been shown and described herein, it is readily understood by those skilled in the art that these embodiments are provided by way of example only. Those skilled in the art will now expect multiple variations, changes and substitutions without departing from the present invention. It should be understood that the various alternatives to the embodiments of the present invention described herein are optionally used to implement the present invention. It is intended to define the scope of the present invention with the following claims, and thus encompass the devices, structures and equivalents thereof within the scope of these claims.

Claims

1. A bimetallic laminate workpiece cavity structure electrolytic machining device, characterized in that: include: A first tool cathode (1) and a second tool cathode (2), wherein the first tool cathode (1) and the second tool cathode (2) are located on different horizontal planes, each of the first tool cathode (1) and the second tool cathode (2) comprises a base (15), a tool handle (16), a tool head (17), a first component (181) and a second component (182), wherein the tool head (17) and the base (15) are respectively connected to the front end and the rear end of the tool handle (16), and the second component (182) is connected to the top end of the base (15) and is configured to form a hollow cavity (20) for an electrolyte (28) to flow through and a liquid outlet for the electrolyte (28) to be ejected together with the first component (181) during the electrolytic machining of a bimetallic laminate workpiece (3). The tool head (17) of the first tool cathode (1) and the tool head (17) of the second tool cathode (2) are configured to face opposite sides of the bimetallic laminate workpiece (3) during the electrolytic machining process, the liquid outlet (21) of the first tool cathode (1) is configured to spray the electrolyte (28) into the gap between the tool head (17) of the first tool cathode (1) and the bimetallic laminate workpiece (3) during the electrolytic machining process, and the liquid outlet (13) of the second tool cathode (2) is configured to spray the electrolyte (28) into the gap between the tool head (17) of the second tool cathode (1) and the bimetallic laminate workpiece (3) during the electrolytic machining process; A first horizontal rotary feed shaft (4) and a second horizontal rotary feed shaft (5), wherein the front end of the first horizontal rotary feed shaft (4) and the front end of the second horizontal rotary feed shaft (5) are respectively connected to the base (15) of the first tool cathode (1) and the second tool cathode (2) and the base (15); A vertical rotary feed shaft (6), the lower end of which is configured to be rotatably connected to the bimetallic laminate workpiece (3); a rotating platform assembly (9) configured to connect the bimetallic laminate workpiece (3) during the electrolytic machining process and to drive the bimetallic laminate workpiece (3) to rotate around its own axis (35) to a next machining position in response to the tool head (17) of the first tool cathode (1) and the tool head (17) of the second tool cathode (2) all returning to their initial positions when no electrolytic machining is performed; and A sump (8) is configured to contain the electrolyte (28) and the bimetallic laminate workpiece (3) during the electrolytic machining process, and the rotating platform assembly (9) and the tool head (17) are located in the sump (8).

2. The bimetallic laminate workpiece cavity structure electrolytic machining device according to claim 1, characterized in that: Also includes a pulse power supply (10); The rear ends of the first horizontal rotary feed shaft (4) and the rear ends of the second horizontal rotary feed shaft (5) are respectively connected to a first motor and a second motor, and the first motor and the second motor are respectively connected to the negative electrode of the pulse power supply (10) through a first wire and a second wire; and The upper end of the vertical rotary feed shaft (6) is connected to a third motor, and the third motor is connected to the positive pole of the pulse power supply (10) via a third wire.

3. The bimetallic laminate workpiece cavity structure electrolytic machining device according to claim 2, characterized in that: A first ammeter (29) and a first switch (24) are sequentially arranged on the first conducting wire, wherein the first ammeter (29) is used to detect the current of the first tool cathode (1) during the electrolytic machining process; and A second ammeter (30) and a second switch (25) are sequentially arranged on the second conducting wire, and the second ammeter (30) is used to detect the current of the second tool cathode (2) during the electrolytic machining process.

4. The bimetallic laminate workpiece cavity structure electrolytic machining device according to claim 1, characterized in that: The cutter head (17) is provided with a position sensor for sensing its own position; The rotating platform assembly (9) includes a controller, a fourth motor electrically connected to the controller, and a platform integrated with the output shaft of the fourth motor, wherein the controller is in communication with the position sensor, and the platform is configured to connect to the bimetallic laminate workpiece (3) and drive the bimetallic laminate workpiece (3) to rotate during the electrolytic machining process. The controller is configured to rotate the output shaft of the fourth motor in response to an electrical signal output by the position sensor indicating that the cutter head (17) has returned to the initial position, thereby driving the platform to rotate.

5. The bimetallic laminate workpiece cavity structure electrolytic machining device according to claim 4, characterized in that: Under the control of the controller, each rotation of the platform causes the bimetallic laminate workpiece (3) to rotate by an angle of 360° / n, wherein n is the total number of channels predetermined to be machined in one side of the bimetallic laminate workpiece (3).

6. The bimetallic laminate workpiece cavity structure electrolytic machining device according to claim 1, characterized in that: Also included is an electrolyte circulation system (36); The hollow cavity (20) of the first tool cathode (1) and the hollow cavity (20) of the second tool cathode (2) are each connected to the electrolyte circulation system (36) through an electrolyte inlet pipe (11); and An electrolyte outflow hole (14) is provided on the upper portion of the side wall of the liquid collecting tank (8), and the electrolyte outflow hole (14) is connected to the electrolyte circulation system (36) through an electrolyte outflow pipe (12).

7. The bimetallic laminate workpiece cavity structure electrolytic machining device according to claim 1, characterized in that: The axis (22) of the first horizontal rotary feed shaft (4) and the axis (23) of the second horizontal rotary feed shaft (5) are not collinear.

8. The bimetallic laminate workpiece cavity structure electrolytic machining device according to claim 1, characterized in that: It also includes a clamp (7), which is mounted on a transverse axis extending laterally from the lower end of the vertical rotating feed axis (6), and the clamp (7) is configured to be located between the rotating platform assembly (9) and the bimetallic laminate workpiece (3) during the electrolytic machining process and to be connected to the rotating platform assembly (9) and the bimetallic laminate workpiece (3) respectively.

9. The bimetallic laminate workpiece cavity structure electrolytic machining device according to claim 1, characterized in that: The knife handle (16) can be moved forward and backward through the side wall of the liquid collecting tank (8), the side wall of the liquid collecting tank (8) is provided with a placement hole, the first component (181) passes through the placement hole and is fixed to the side wall of the liquid collecting tank (8), and the second component (182) can be moved forward and backward through the placement hole; The cross-sections of the first component (181) and the second component (182) are both L-shaped, and the distance (19) that the bent portion of the first component (181) extends beyond the blade head (17) is 1 to 2 mm.

10. A method for electrolytic machining of a bimetallic laminate workpiece cavity structure, characterized in that: The following steps are performed using the bimetallic laminate workpiece cavity structure electrolytic machining device described in any one of claims 1 to 9: Step 1: placing the bimetallic laminate workpiece (3) at a designated position in the liquid collecting tank (8) so as to be connected to the rotating platform assembly (9), sequentially starting the electrolyte circulation system (36) and the pulse power supply (10), and turning on the first switch (24) and the second switch (25), so that the tool head (17) of the first tool cathode (1) and the tool head (17) of the second tool cathode (2) are moved from their respective initial positions at different feed speeds and different initial distances between the tool head (17) and the corresponding side of the bimetallic laminate workpiece (3). The gap moves in the axial direction toward the opposite sides of the bimetallic laminate workpiece (3) to respectively and simultaneously process the first metal plate (26) and the second metal plate (27) of the bimetallic laminate workpiece (3), wherein when the value of each of the first ammeter (29) and the second ammeter (30) suddenly changes, the first switch (24) and the second switch (25) are disconnected, so that the tool head (17) of the first tool cathode (1) and the tool head (17) of the second tool cathode (2) are all retracted to their corresponding initial positions; Step 2: After the tool head (17) of the first tool cathode (1) and the tool head (17) of the second tool cathode (2) are all retracted to their corresponding initial positions, the electrolyte circulation system (36) is closed, and the rotating platform assembly (9) drives the bimetallic laminate workpiece (3) to rotate around its own axis (35) to the next processing position in response to the tool head (17) of the first tool cathode (1) and the tool head (17) of the second tool cathode (2) being all retracted to their corresponding initial positions; Step 3: Repeat the steps 1 and 2 until all the predetermined processing positions of the bimetallic laminate workpiece (3) are processed, then close the electrolyte circulation system (36), and rotate the vertical rotary feed shaft (6) around its own axis (31) to drive the bimetallic laminate workpiece (3) to rotate 180° around the vertical rotary feed shaft (6), thereby obtaining a semi-finished workpiece (33); Step 4: starting the electrolyte circulation system (36) to enable the tool head (17) of the first tool cathode (1) and the tool head (17) of the second tool cathode (2) to move from their respective initial positions in the axial direction toward the opposite sides of the bimetallic laminate workpiece (3) at different feed speeds and different initial gaps between them and the corresponding sides of the bimetallic laminate workpiece (3), so as to process the second metal plate (27) and the first metal plate (26) respectively, until the processed channel is connected with the corresponding channel (32) processed in the step 1, and then returning the tool head (17) of the first tool cathode (1) and the tool head (17) of the second tool cathode (2) to their respective initial positions; and Step 5: Repeat steps 2 and 4 until each of the processed channels is connected with the corresponding channel (32) processed in step 1 to form a cavity structure, and then turn off the pulse power supply (10) and the electrolyte circulation system (36) in turn, thereby obtaining a finished workpiece (34).

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