Rapid cathode conversion device for electrolytic machining of cartridge receiver and machining method

Abstract

The invention provides a rapid cathode conversion device for cartridge receiver electrolytic machining. The rapid cathode conversion device comprises a steering device, a supporting device and a feeding main shaft. The steering device comprises a steering plate, a cathode mounting head, a cathode, a positioning ball, a liquid inlet, a liquid outlet pipeline, a liquid outlet valve, a cathode protection cover and a rotating shaft; the supporting device is characterized by comprising a base and a positioning groove; the feeding main shaft is connected with electrolysis equipment and has the radial feeding function, and it is ensured that the cathode can conduct feeding motion in the machining process. The invention discloses a rapid conversion cathode machining method for cartridge receiver electrolytic machining. The method comprises the steps that a cathode steering device is connected; starting a processing power supply, and starting an electrolyte circulating system and a machine tool control system; opening a processing position liquid outlet valve; the cathode at the machining position gradually gets close to the cartridge receiver workpiece and generates electrochemical dissolution; and starting an electrolyte circulating system. The method has the advantages that the machining efficiency of casing electrolysis is improved, the position error of a machining area is avoided, and the electrolyte pressure is prevented from being reduced.

Description

Technical Field

[0001] The invention relates to the technical field of electrolytic machining, and in particular to a cathode rapid conversion device and a machining method for casing electrolytic machining. Background Art

[0002] The casing is a large rotating part that plays the role of connection, load bearing, support and containment in the aircraft engine. It is the main load-bearing component on the aircraft engine. The casing is mostly a thin-walled structure with a wall thickness of usually 2-5mm, and the local wall thickness is even less than 1mm. From the blank to the part processing process, the material removal rate can reach 60-80%. A large removal rate often leads to processing deformation, long processing cycle, and high consumption cost.

[0003] Electrochemical machining provides a feasible direction for casing manufacturing, and block electrolysis is one of the commonly used methods in casing electrochemical machining. In block electrochemical machining, different characteristic cathodes need to be designed according to the casing cavity structure, and the machining area is divided into multiple machining stations according to the casing size and cathode size. During the electrochemical machining process, cathodes with different characteristics need to be disassembled and replaced, and disassembling the cathode consumes a lot of time, which reduces the efficiency of casing electrochemical machining. Summary of the invention

[0004] The purpose of the present invention is to improve the processing efficiency of casing block electrolysis and reduce the cumbersome steps of disassembling and replacing the cathode (5), and a cathode rapid conversion device and processing method for casing electrolysis are provided.

[0005] The present invention provides a cathode rapid conversion device for casing electrolytic machining, which is characterized by comprising a steering device, a supporting device and a feed spindle 12; the steering device comprises a steering plate 1, a cathode mounting head 6, a cathode 5, a positioning ball, a liquid inlet 2, a liquid outlet pipe 3, a liquid outlet valve 4, a cathode 5 protection cover, and a rotating shaft 8; the supporting device features include a base 10 and a positioning groove.

[0006] The feed spindle 12 is connected to the electrolysis equipment and has a radial feed function to ensure that the cathode 5 can perform a feed movement during the processing;

[0007] The steering plate 1 in the steering device is in a triangular structure, and a cathode mounting head 6 is provided at the front end of each corner. The cathode mounting head 6 is connected to the processed cathode 5 to ensure that the cathode 5 can be rotated and replaced;

[0008] The cathode mounting head 6 is a flange 11 device, the number of which is 3 and distributed in a triangular shape. This structure ensures that during the processing, the other two cathodes 5 do not interfere with the processing process. A positioning ball is provided below the cathode mounting head 6, which corresponds to the position of the positioning groove on the base 10 to ensure the accuracy of the processing position.

[0009] The liquid inlet 2 is connected to the electrolyte pipeline of the device, so that the electrolyte can enter the cathode rapid conversion device;

[0010] The liquid outlet pipe 3 is connected to the liquid inlet 2 and the cathode mounting head 6. In order to ensure the stability of the liquid outlet pipe 3 after the cathode 5 is installed, the liquid outlet pipe 3 is placed above the supporting device, and the weight of the liquid outlet pipe 3 is borne by the base 10 of the supporting device.

[0011] The liquid outlet valve 4 is installed on the liquid outlet pipe 3, and the valve is opened when in the processing position, and the valve is closed when in the non-processing position, to ensure that the electrolyte cannot flow out from the water outlet gap of the cathode 5;

[0012] The cathode 5 protection cover is made of silica gel, which is corrosion-resistant and anti-aging. It can also tightly wrap the cathode 5 to prevent the surrounding electrolyte from entering and prevent stray corrosion of the cathode 5 at the non-processing position.

[0013] The base 10 in the supporting device is located below the steering plate 1 and has a triangular structure. A positioning groove is provided at the alignment processing area, which can be docked with the positioning ball below the cathode mounting head 6.

[0014] A fast cathode conversion processing method for casing electrolytic processing comprises the following steps:

[0015] Step 1: Connect the cathode 5 steering device. Connect the base 10 to the feed spindle 12, the liquid inlet 2 to the liquid inlet pipe, and connect the characteristic cathode 5 to the cathode mounting head 6. According to the casing cavity structure, align the cathode 5 to be processed with the casing workpiece, and the positioning ball under the cathode mounting head 6 enters the positioning groove to ensure the accuracy of the processing position.

[0016] Step 2: Check the power supply, electrical circuit and liquid outlet to ensure that there is no open circuit or short circuit in the circuit system; ensure that each liquid outlet valve 4 is in a closed state; ensure that the cathode 5 in the non-processing position has a cathode 5 protection cover installed.

[0017] Step 3: Turn on the processing power supply, start the electrolyte circulation system and the machine tool control system; open the processing position outlet valve 4.

[0018] Step 4: Driven by the feed spindle 12, the cathode 5 at the processing position gradually approaches the workpiece of the casing and electrochemical dissolution occurs.

[0019] Step 5: After the processing of the current characteristic cathode 5 is completed, the electrolyte circulation system is closed, and the feed spindle 12 is moved backward to make the current characteristic cathode 5 exit the cavity structure of the casing workpiece.

[0020] Step 6: Move the casing workpiece to the next station. Rotate the cathode quick conversion device to move the next characteristic cathode 5 to the processing area, and the positioning ball enters the positioning groove to ensure the accuracy of the processing position. Open the valve 4 of the outlet where the processing cathode 5 is located, close the valve 4 of the outlet where the previous characteristic cathode 5 is located, and install the cathode 5 protection cover at the same time.

[0021] Step 7: Start the electrolyte circulation system. Repeat steps 3 to 6 until all the characteristic structures of the receiver are processed.

[0022] Step 8: After all processing is completed, take out the casing workpiece, clean the electrolytic processing products, and transfer to the next process.

[0023] Advantages of the present invention:

[0024] The cathode rapid conversion device and processing method for casing electrolytic processing described in the present invention are suitable for casing block electrolytic processing. Through the cathode rapid conversion device, the cathode can be quickly replaced during the electrolytic processing without the need to disassemble the cathode, thereby improving the processing efficiency of casing electrolysis. Through the design of the positioning device, the position accuracy of the cathode after reaching the processing area can be ensured, saving the cathode position adjustment time and avoiding the position error of the processing area. Through the design of the liquid outlet valve, it can be ensured that no electrolyte passes through the liquid outlet pipeline in the non-processing area, thereby avoiding the reduction of electrolyte pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described in detail below with reference to the accompanying drawings and embodiments:

[0026] Figure 1 This is a schematic diagram of the cathode rapid switching device from a top view;

[0027] Figure 2 It is a schematic diagram of the cathode rapid switching device from the side view;

[0028] Figure 3 Schematic diagram of cathode structure;

[0029] Figure 4 This is a schematic diagram of the cathodic protection cover;

[0030] 1—steering plate, 2—liquid inlet, 3—liquid outlet pipe, 4—liquid outlet valve, 5—cathode, 6—cathode mounting head, 7—positioning ball and positioning groove, 8—rotating shaft, 9—locking screw, 10—base, 11—connecting flange, 12—feed spindle. DETAILED DESCRIPTION

[0031] The present invention will be further explained below in conjunction with specific implementation plans, but the present invention is not limited thereto. The structures, proportions, and sizes illustrated in the drawings of the specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented, so they have no substantive technical significance. Any structural modification, change in proportional relationship, or adjustment of size should still fall within the scope of the technical content disclosed by the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0032] A cathode rapid conversion device for casing electrolytic machining comprises a steering device, a supporting device and a feed spindle 12; the steering device comprises a steering plate 1, a cathode mounting head 6, a cathode 5, a positioning ball, a liquid inlet 2, a liquid outlet pipe 3, a liquid outlet valve 4, a cathode 5 protection cover, and a rotating shaft 8; the supporting device comprises a base 10 and a positioning groove.

[0033] The feed spindle 12 is connected to the electrolysis equipment and has a radial feed function to ensure that the cathode 5 can perform a feed movement during the processing;

[0034] The steering plate 1 in the steering device is in a triangular structure, and a cathode mounting head 6 is provided at the front end of each corner. The cathode mounting head 6 is connected to the processed cathode 5 to ensure that the cathode 5 can be rotated and replaced;

[0035] The cathode mounting head 6 is a flange 11 device, the number of which is 3 and distributed in a triangular shape. This structure ensures that during the processing, the other two cathodes 5 do not interfere with the processing process. A positioning ball is provided below the cathode mounting head 6, which corresponds to the position of the positioning groove on the base 10 to ensure the accuracy of the processing position.

[0036] The liquid inlet 2 is connected to the electrolyte pipeline of the device, so that the electrolyte can enter the cathode rapid conversion device;

[0037] The liquid outlet pipe 3 is connected to the liquid inlet 2 and the cathode mounting head 6. In order to ensure the stability of the liquid outlet pipe 3 after the cathode 5 is installed, the liquid outlet pipe 3 is placed above the supporting device, and the weight of the liquid outlet pipe 3 is borne by the base 10 of the supporting device.

[0038] The liquid outlet valve 4 is installed on the liquid outlet pipe 3, and the valve is opened when in the processing position, and the valve is closed when in the non-processing position, to ensure that the electrolyte cannot flow out from the water outlet gap of the cathode 5;

[0039] The cathode 5 protection cover is made of silica gel, which is corrosion-resistant and anti-aging. It can also tightly wrap the cathode 5 to prevent the surrounding electrolyte from entering and prevent stray corrosion of the cathode 5 at the non-processing position.

[0040] The base 10 in the supporting device is located below the steering plate 1 and has a triangular structure. A positioning groove is provided at the alignment processing area, which can be docked with the positioning ball below the cathode mounting head 6.

[0041] A specific implementation case of a cathode rapid conversion device and processing method for casing electrolytic machining is as follows:

[0042] Step 1: Connect the cathode 5 steering device. Connect the steering plate 1 to the feed spindle 12, the liquid inlet 2 to the liquid inlet pipe, and connect the cathodes 5 of the three characteristic structures to the cathode mounting head 6. According to the casing cavity structure, align the cathode 5 to be processed with the casing workpiece, and the positioning ball under the cathode mounting head 6 enters the positioning groove to ensure the accuracy of the processing position.

[0043] Step 2: Check the power supply, electrical circuit and liquid outlet to ensure that there is no open circuit or short circuit in the circuit system; ensure that the liquid outlet valve 4 at the non-processing position is in a closed state and the cathode 5 protection cover is installed; open the liquid outlet valve 4 at the processing position.

[0044] Step 3: Tighten the locking screw 9 on the rotating shaft 8 to ensure the stability of the cathode 5 steering device during electrolytic machining and feeding. After the cathode 5 steering device is adjusted, turn on the machining power supply, start the electrolyte circulation system and the machine tool control system. The machining voltage is about 18V, and the initial gap between the cathode 5 and the casing workpiece is about 0.3mm.

[0045] Step 4: Driven by the feed spindle 12, the cathode 5 at the processing position gradually approaches the casing workpiece and electrochemical dissolution occurs. The feed rate of electrolytic machining in the casing rough machining stage is generally 0.5 mm / min. The electrolyte flows in from the liquid inlet 2 and enters the processing cathode 5 through the liquid outlet pipe 3. During the electrolytic machining process, the electrolyte flows out through the water outlet gap of the cathode 5, and the width of the water outlet gap is generally in the range of 0.2 mm to 0.8 mm.

[0046] Step 5: After the processing of the current characteristic cathode 5 is completed, the electrolyte circulation system is closed, and the feed spindle 12 is moved backward so that the cathode 5 at the current processing position exits the cavity structure of the casing workpiece.

[0047] Step 6: Move the casing workpiece to the next station. Rotate the cathode quick conversion device to move the next characteristic cathode 5 to the processing area, and the positioning ball enters the positioning groove. Open the liquid outlet valve 4 where the processing cathode 5 is located, close the liquid outlet valve 4 of the previous characteristic cathode 5, and install the cathode 5 protection cover for the previous characteristic cathode 5.

[0048] Step 7: Start the electrolyte circulation system. Repeat steps 3 to 6 until all the characteristic structures of the receiver are processed.

[0049] Step 8: After all processing is completed, take out the casing workpiece, clean the processed product, and transfer to the next process.

[0050] Matters not covered by the present invention are known technologies.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cathode rapid conversion device for casing electrolytic machining, characterized in that: It comprises a steering device, a supporting device and a feeding spindle (12); The steering device comprises a steering plate (1), a cathode mounting head (6), a cathode (5), a positioning ball, a liquid inlet (2), a liquid outlet pipe (3), a liquid outlet valve (4), a cathode (5) protection cover, and a rotating shaft (8); The supporting device comprises a base (10) and a positioning groove; the feeding spindle (12) is connected to the electrolysis equipment and has a radial feeding function to ensure that the cathode (5) can perform feeding movement during the processing; The steering plate (1) in the steering device is in a triangular structure, and a cathode mounting head (6) is provided at the front end of each corner. The cathode mounting head (6) is connected to the processed cathode (5) to ensure that the cathode (5) can be rotated and replaced. The cathode mounting head (6) is a flange (11) device, the number of which is 3 and distributed in a triangular shape. This structure ensures that during the processing, the other two cathodes (5) do not interfere with the processing process; a positioning ball is provided below the cathode mounting head (6) and corresponds to the position of the positioning groove on the base (10) to ensure the accuracy of the processing position; The liquid inlet (2) is connected to the electrolyte pipeline of the device, so that the electrolyte can enter the cathode quick conversion device; the liquid outlet pipeline (3) is connected to the liquid inlet (2) and the cathode mounting head (6); the liquid outlet valve (4) is installed on the liquid outlet pipeline (3), the valve is opened when in the processing position, and the valve is closed when in the non-processing position, so as to ensure that the electrolyte cannot flow out from the water outlet gap of the cathode (5); The cathode (5) protection cover is made of a silicone material, which wraps the cathode (5) to prevent the surrounding electrolyte from entering and prevent the cathode (5) at a non-processing position from being corroded; The base (10) in the supporting device is located below the steering plate (1) and is in a triangular structure. A positioning groove is provided at the alignment processing area and is docked with a positioning ball below the cathode mounting head (6).

2. A method for machining a fast-changing cathode (5) for electrolytic machining of a casing as claimed in claim 1, comprising the following steps: Step 1: Connect the cathode (5) steering device, connect the base (10) to the feed spindle (12), connect the liquid inlet (2) to the liquid inlet pipeline, and connect the characteristic cathode (5) to the cathode mounting head (6); according to the casing cavity structure, align the cathode (5) to be processed with the casing workpiece, and the positioning ball under the cathode mounting head (6) enters the positioning groove to ensure the accuracy of the processing position; Step 2: Check the power supply, electrical circuit and liquid outlet to ensure that there is no open circuit or short circuit in the circuit system; ensure that each liquid outlet valve (4) is in a closed state; ensure that the cathode (5) protection cover is installed on the cathode (5) in the non-processing position; Step 3: Turn on the processing power supply, start the electrolyte circulation system and the machine tool control system; open the processing position outlet valve (4); Step 4: under the drive of the feed spindle (12), the cathode (5) at the processing position gradually approaches the workpiece of the casing and electrochemical dissolution occurs; Step 5: After the processing of the current characteristic cathode (5) is completed, the electrolyte circulation system is closed, and the feed spindle (12) is moved backward, so that the current characteristic cathode (5) exits the cavity structure of the casing workpiece; Step 6: Move the casing workpiece to the next workstation; rotate the cathode quick conversion device to move the next characteristic cathode (5) to the processing area, and the positioning ball enters the positioning groove to ensure the accuracy of the processing position; open the liquid outlet valve (4) where the processing cathode (5) is located, close the liquid outlet valve (4) where the previous characteristic cathode (5) is located, and install the cathode (5) protection cover at the same time; Step 7: Start the electrolyte circulation system; repeat steps 3 to 6 until all characteristic structures of the casing are processed; Step 8: After all processing is completed, take out the casing workpiece, clean the electrolytic processing products, and transfer to the next process.

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