CN107297550A - A kind of Electrolyzed Processing work piece apparatus - Google Patents

Abstract

The invention discloses an electrolytic processing workpiece device, which comprises a pulse power supply and a processing cathode. The positive pole of the pulse power supply is used for conductive connection with the workpiece. The processing cathode includes a finishing cathode and a roughing cathode which are stacked in sequence along the processing direction and are insulated from each other. It also includes a controller arranged between the negative pole of the pulse power supply and the processing cathode, the first output end of the controller is connected to the rough machining cathode, the second output end of the controller is connected to the finishing cathode, and the pulse current of the first output end occupies The duty ratio is greater than the duty ratio of the pulse current at the second output terminal. In this electrolytic machining workpiece device, the machining cathode is directly divided into a rough machining cathode and a finish machining cathode along the machining direction, that is, rough machining and finish machining are completed in one feeding process, and the maximum improvement is achieved under the premise of ensuring machining accuracy. Machining efficiency can be improved, and at the same time, it can effectively solve the problem of poor continuity of rough and fine machining in conventional electrolytic machining.

Description

A device for electrolytic machining of workpieces

technical field

The invention relates to the technical field of processing machinery, more specifically, to an electrolytic processing workpiece device.

Background technique

With the development of the industry, the development of electrification, lightweight and intelligent vehicles is getting better and better, but the current high cost has become the biggest resistance to this type of vehicles. As for the cost reduction, in addition to the battery, the cost reduction of the components themselves is equally important, including the drive shaft.

The transmission shaft is a key component of electric vehicles. The internal gear of the transmission shaft generally follows the traditional process, and its processing is usually arranged after heat treatment as the final processing, and the workpiece after heat treatment has higher hardness and greater strength. If the broaching process is used for processing, the tool wears quickly, and usually a broach worth tens of thousands of yuan only has a service life of dozens of times; if the CNC milling process is used for processing, not only the processing cost is high, but the surface of the workpiece obtained by processing There will be flashes and burrs that are difficult to remove. However, electrolytic machining has the excellent characteristics of high efficiency, high surface quality, no tool loss, and one-time molding. It has great advantages in internal gear processing, which can greatly reduce the manufacturing cost of internal gears in transmission shafts, and is of great significance to promote the development and promotion of electric vehicles.

In the prior art, the electrolytic machining device for difficult-to-cut materials and small-modulus internal gears uses a tool cathode with a special-shaped structure up and down. During the machining process, the electrolyte flow mode of positive flow and back pressure is used. The pressure increases with the increase of the processing depth, so as to ensure the high-speed flow of the electrolyte, take away the electrolytic products, improve the processing stability, and realize low-cost electrolytic processing of difficult-to-cut materials and small-module internal gears. However, since the cathode is integrated, rough machining or finish machining can only be realized in one process, and high-precision machining cannot be guaranteed at the same time as high efficiency, that is, rough-finish machining cannot be performed synchronously during the process.

To sum up, how to effectively solve the problem of poor continuity of the rough and finish machining of the workpiece by the electrolytic machining device is a problem urgently needed by those skilled in the art.

Contents of the invention

In view of this, the object of the present invention is to provide a device for electrolytic machining of workpieces, which can maximize the processing efficiency while ensuring the machining accuracy, and can effectively solve the problem of continuous rough and fine machining in conventional electrolytic machining. sexual problems.

In order to achieve the above object, the present invention provides the following technical solutions:

An electrolytic processing workpiece device, comprising a pulse power supply and a processing cathode, the positive electrode of the pulse power supply is used for conductive connection with the workpiece, and the processing cathode includes a finishing cathode and a roughing cathode that are stacked in sequence along the processing direction and are insulated from each other, It also includes a controller arranged between the negative electrode of the pulse power supply and the processing cathode, the first output end of the controller is connected to the rough processing cathode, the second output end of the controller is connected to the finishing The cathode is connected, and the pulse current duty cycle of the first output terminal is greater than the pulse current duty cycle of the second output terminal.

Preferably, an intermediate processing cathode is also provided between the finishing cathode and the rough processing cathode, the third output terminal of the controller is connected to the intermediate processing cathode, and the pulse current of the third output terminal is in duty The ratio is between the pulse current duty cycle of the first output terminal and the pulse current duty cycle of the second output terminal.

Preferably, the diameters of the finishing cathode, the intermediate processing cathode and the rough processing cathode are all tapered along the processing direction.

Preferably, the finishing cathode, the intermediate processing cathode and the rough processing cathode are combined into a truncated cone shape.

Preferably, the processing cathode further includes a central shaft, the finishing cathode, the intermediate processing cathode and the rough processing cathode are sequentially sleeved on the central shaft, and one end of the central shaft is provided with a The limit block against which the machining cathode abuts is provided at the other end with a locking nut which is threadedly connected with the central shaft and abuts against the finishing cathode.

Preferably, the front end of the central shaft is provided with a guide block for slidingly fitting with the hole to be processed of the workpiece.

Preferably, insulating gaskets are provided between the finishing cathode and the intermediate processing cathode, and between the intermediate processing cathode and the rough processing cathode, and the thickness of the insulating gasket is between 10 mm and 20 mm. between millimeters.

Preferably, the central shaft is in the shape of a tube, and a diversion hole communicating with the tube hole of the central shaft is provided in the limiting block, and the diameter of the limiting block is equal to the diameter of the front end of the rough-processed cathode .

The invention provides an electrolytic processing workpiece device, which comprises a pulse power supply, a processing cathode and a controller. The processing cathode includes a finishing cathode and a roughing cathode which are stacked in sequence along the processing direction and are insulated from each other, that is, the finishing cathode completes finishing, and the roughing cathode completes roughing. The controller is set between the negative pole of the pulse power supply and the processing cathode, and the controller is provided with a first output terminal and a second output terminal, wherein the first output terminal is connected to the rough machining cathode to output pulse current to the rough machining cathode ; while the second output end is connected with the finishing cathode to output pulse current to the roughing cathode. And wherein the pulse current ratio of the first output end is greater than that of the second output end, so that the rough machining cathode is processed with a large removal amount, and the finishing cathode is processed with a small removal amount.

According to the above-mentioned technical scheme, it can be known that when applying the electrolytic machining workpiece device, the front end of the rough machining cathode is slightly extended into the shaft hole along the machining direction, and then the electrolyte is filled, and then the pulse power supply is turned on. Radial feed, the machining cathode continues to deepen along the machining direction, and continues to move along the machining direction, the front rough machining cathode performs rough machining, the rear end finishing cathode performs finishing machining, and until the finishing of the entire shaft hole is completed. In this electrolytic machining workpiece device, the machining cathode is directly divided into a rough machining cathode and a finish machining cathode along the machining direction, and currents of different parameters are input to the rough machining cathode and the finish machining cathode through different ports of the controller, so that the rough machining cathode And finishing cathode can complete roughing and finishing respectively, that is, in one feeding process, roughing and finishing can be completed. Because roughing and finishing are completed synchronously, the transition between roughing and finishing is very good. The device for electrolytic machining of workpieces maximizes machining efficiency while ensuring machining accuracy, and can effectively solve problems in conventional electrolytic machining. The problem of poor continuity of rough and finish machining.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural diagram of an electrolytic machining workpiece device provided by an embodiment of the present invention.

The markings in the attached drawings are as follows:

Pulse power supply 1, finish machining cathode 2, rough machining cathode 3, controller 4, intermediate machining cathode 5, central shaft 6, limit block 7, lock nut 8, guide block 9, workpiece 10.

detailed description

The embodiment of the present invention discloses a device for electrolytic machining of a workpiece to effectively solve the problem that the electrolytic machining device has poor continuity in the rough and fine machining of the workpiece.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to FIG. 1 . FIG. 1 is a schematic structural diagram of an electrolytic machining workpiece device provided by an embodiment of the present invention.

In a specific embodiment, this embodiment provides an electrolytic processing workpiece device, specifically, the electrolytic processing workpiece device includes a pulse power source 1 , a processing cathode and a controller 4 .

Among them, the positive pole of the pulse power supply 1 is used for the conductive connection of the workpiece, and the negative pole of the pulse power supply 1 is used to send pulse electric current to the processing cathode, and an electrolyte with a certain flow rate flows between the workpiece 10 and the cathode, through the flow of the electrolyte , so that the processing surface of the workpiece 10 is gradually processed into a surface that matches the processing cathode.

The processing cathode includes a finish processing cathode 2 and a rough processing cathode 3 which are stacked in sequence along the processing direction and are insulated from each other, that is, the finish processing cathode 2 completes finishing processing, and the rough processing cathode 3 completes rough processing. Wherein the finishing cathode 2 and the roughing cathode 3 are stacked sequentially along the machining direction, it means that the roughing cathode 3 is in front and the finishing cathode 2 is behind, so that the roughing is performed first, and then the finishing is performed. It should be noted that the diameter of the rough cathode 3 should be smaller than the diameter of the finish cathode 2 . The specific size should be related to the size of the shaft hole to be processed, and is not specifically limited here.

Wherein the controller 4 is arranged between the negative pole of the pulse power supply 1 and the processing cathode, and the controller 4 is provided with a first output terminal and a second output terminal, wherein the first output terminal is connected with the rough machining cathode 3 to provide a rough processing The cathode 3 outputs a pulse current; and the second output terminal is connected to the finishing cathode 2 to output a pulse current to the roughing cathode 3 . In addition, the pulse current ratio of the first output end is greater than that of the second output end, so that the rough machining cathode 3 is processed with a large removal amount, and the finishing cathode 2 is processed with a small removal amount. It should be noted that the first output terminal and the second output terminal of the controller 4 are connected with high-frequency power tubes, and the controller 4 controls the on-off of the high-frequency power tubes at different output terminals through its own control capability to realize Currents with different parameters are provided to the roughing cathode 3 and the finishing cathode 2, thereby realizing roughing and finishing.

In this embodiment, when using the electrolytic machining workpiece device, the front end of the rough machining cathode 3 is slightly inserted into the shaft hole along the machining direction, and then filled with electrolyte, and then the pulse power supply 1 is turned on. Feed forward, the machining cathode continues to deepen along the machining direction, and continues to move along the machining direction, the front rough machining cathode 3 performs rough machining, and the rear end finish machining cathode 2 performs finishing machining until the finishing of the entire shaft hole is completed. In the electrolytic machining workpiece device, the machining cathode is directly divided into a rough machining cathode 3 and a finishing cathode 2 along the machining direction, and currents of different parameters are input to the rough machining cathode 3 and the finishing cathode 2 through different ports of the controller 4, So that the rough machining cathode 3 and the finish machining cathode 2 can respectively complete the rough machining and the finish machining, that is, the rough machining and the finish machining can be completed in one feeding process. Because the rough machining and finishing machining are completed synchronously, the transition between rough machining and finishing machining is very good, and the ECM workpiece device can maximize the machining efficiency while ensuring the machining accuracy, and can effectively solve the problem of conventional ECM The problem of poor continuity of rough and fine machining in the machine.

Further, it is preferable that an intermediate processing cathode 5 is further provided between the finishing cathode 2 and the rough processing cathode 3 , that is, the processing accuracy of the intermediate processing cathode 5 is between the rough processing cathode 3 and the finishing cathode 2 . And a third output terminal is provided on the controller 4, and the pulse current duty ratio of the third output terminal is located between the pulse current duty ratio of the first output terminal and the pulse current duty ratio of the second output terminal, so that the middle The single processing amount of the processed cathode 5 is between the rough processed cathode 3 and the finished processed cathode 2 . By setting the intermediate machining cathode 5, when the amount of rough machining is relatively large, an intermediate transition can be formed, thereby fully ensuring the finish machining effect.

Further, it is preferable that the diameters of the finishing cathode 2, the intermediate processing cathode 5 and the rough machining cathode 3 are tapered along the processing direction, that is, the diameters of the processing cathodes at all levels are gradually reduced from the rear end to the front end, so that the processing at each level The cathode is along the processing direction, and the processing depth is gradually increased to achieve stable processing of the cathode at all levels. Further, it is preferable that the finishing cathode 2 , the intermediate processing cathode 5 and the rough processing cathode 3 are combined into a truncated cone shape, so that there is a better transition between the processing cathodes at all levels.

Further, in order to facilitate the assembly of various parts of the cathode, it is preferred that the processing cathode is also provided with a central shaft 6, and the finishing cathode 2, the intermediate processing cathode 5 and the rough processing cathode 3 are sequentially sleeved on the central shaft 6, and the One end of the central axis 6 is provided with a stop block 7 that is against the rough machining cathode 3, and the other end is provided with a lock nut 8 that is threadedly connected with the central axis 6 and that is against the finish machining cathode 2, so that each The level processing cathodes are fixed sequentially.

Further, in order to make the electrolyte have a better flow direction, the central axis 6 is in the shape of a tube, and the limiting block 7 is provided with a diversion hole that extends radially and communicates with the inner hole of the central axis 6, and the end of the diversion hole Extend to the outer surface of the limit block 7. In order to have better guidance, the diameter of the limiting block 7 is preferably equal to the diameter of the front end of the rough-processed cathode 3 .

Further, preferably, a guide block 9 is provided on the front end of the central shaft 6 for slidingly fitting with the hole to be processed of the workpiece 10, and the guide block 9 is fixedly connected to the front end of the central shaft 6, specifically, it may be threaded. Through the guidance of the guide block 9, the moving direction of the entire processing cathode is ensured.

Further, it is preferable that an insulating gasket is arranged between the finishing cathode 2 and the intermediate processing cathode 5, and between the intermediate processing cathode 5 and the rough machining cathode 3, and the insulating gaskets are used to insulate the processing cathodes at all levels, Of course, there may be different insulation methods between the processing cathodes at all levels, which will not be repeated here. In order to ensure a good transition between the processing cathodes at all levels, the thickness of the insulating spacer is preferably between 10 mm and 20 mm.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. An electrolytic processing workpiece device, comprising a pulse power supply and a processing cathode, the positive pole of the pulse power supply is used for conductive connection with the workpiece, it is characterized in that, the processing cathode includes successively stacked and mutually insulated finish processing along the processing direction The cathode and the rough processing cathode also include a controller arranged between the negative pole of the pulse power supply and the processing cathode, the first output end of the controller is connected to the rough processing cathode, and the first output terminal of the controller is connected to the rough processing cathode. The two output terminals are connected to the finishing cathode, and the pulse current duty ratio of the first output terminal is greater than the pulse current duty ratio of the second output terminal. 2. The electrolytic machining workpiece device according to claim 1, characterized in that, an intermediate machining cathode is also arranged between the finishing cathode and the rough machining cathode, and the third output terminal of the controller is connected to the The cathode connection is processed in the middle, and the pulse current duty cycle of the third output end is between the pulse current duty cycle of the first output end and the pulse current duty cycle of the second output end. 3 . The device for electrolytically machining a workpiece according to claim 2 , wherein the diameters of the finishing cathode, the intermediate machining cathode and the rough machining cathode are tapered along the machining direction. 4 . 4 . The device for electrolytically machining a workpiece according to claim 3 , wherein the finishing cathode, the intermediate machining cathode and the rough machining cathode are combined into a truncated cone shape. 5 . 5. The device for electrolytic machining workpiece according to claim 2-4, characterized in that, the machining cathode further comprises a central axis, and the finishing cathode, the intermediate machining cathode and the rough machining cathode are sequentially sleeved on On the central shaft, one end of the central shaft is provided with a limit block which abuts against the rough machining cathode, and the other end is provided with a lock nut which is threadedly connected with the central shaft and abuts against the finishing cathode. 6 . The device for electrolytically machining a workpiece according to claim 5 , wherein a guide block for slidingly fitting with the hole to be machined of the workpiece is provided at the front end of the central shaft. 7 . 7. The device for electrolytically machining workpieces according to claim 6, characterized in that insulation is provided between the finishing cathode and the intermediate machining cathode, and between the intermediate machining cathode and the rough machining cathode. gasket, the thickness of the insulating gasket is between 10mm and 20mm. 8. The electrolytic machining workpiece device according to claim 7, characterized in that, the central shaft is in the shape of a tube, and a diversion hole communicating with the tube hole of the central shaft is arranged in the limiting block, and the The diameter of the limiting block is equal to the diameter of the front end of the rough-processed cathode.