Combined type machining head, machining device comprising combined type machining head and use method

Abstract

The invention belongs to the technical field of non-traditional machining, and particularly relates to a combined type machining head, a machining device comprising the combined type machining head and a using method, the combined type machining head comprises an electric spark electrode and a tubular electrode for electrolysis which are coaxially arranged, and the electric spark electrode is vertically arranged in the tubular electrode for electrolysis in a sliding mode; the flow guide device is used for connecting the electric spark electrode and the electrolysis tube electrode, the electrolysis tube electrode is fixedly connected to the bottom of the flow guide device, and the electric spark electrode and the flow guide device are movably arranged; the liquid inlet end of the electric spark electrode is used for inputting deionized water; the flow guide device is provided with an electrolyte inlet and an electrolyte outlet, and the electrolyte outlet is coaxially arranged on the outer side of the tubular electrode for electrolysis in a sleeving manner; the flow guiding device is not communicated with the electric spark electrode. The invention further discloses a machining device comprising the machining head and a using method. Compared with a step-by-step combined machining process, the device can eliminate secondary positioning errors and repeated positioning time consumption, and the machining precision and machining efficiency of the workpiece are improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of special processing, and particularly relates to a composite machining head, a machining device comprising the composite machining head and a use method. BACKGROUND

[0002] With the continuous development of modern industry, micro-hole groove structures and high-depth-diameter ratio structures are increasingly widely applied to parts. Such structures often have microstructures and extreme processing requirements such as large quantity, high consistency, high efficiency manufacturing, stress-free manufacturing, and extremely high machining precision and quality.

[0003] Electric discharge machining is to remove redundant metal materials by thermal corrosion through local high temperature generated during spark discharge. However, the conventional electric discharge machining of small holes will produce defects such as recast layer and micro-cracks on the hole wall surface. These defects not only do not meet the extremely high machining quality requirements, but also affect the performance and service life of the parts. In addition, the hole wall of the electric discharge machining will have a certain taper, which will affect the shape accuracy.

[0004] Electrochemical machining is a machining technology that removes redundant materials based on the principle of electrochemical dissolution of metal anodes in electrolyte to realize part machining and forming. However, the machining efficiency and precision of electrochemical machining technology in machining micro-hole groove structures and high-depth-diameter ratio structures are lower than those of electric discharge machining, and a sharp peak protrusion will be generated at the bottom of the hole, affecting the machining quality and stability.

[0005] To solve the surface integrity problem of electric discharge machining and the efficiency and precision problem of electrochemical machining, electric discharge electrochemical combined machining, which combines the advantages of both, has become a current research hotspot. However, it is difficult to adjust parameters and there are problems such as easy burning and falling of the insulating layer on the side wall of the electrode when using a single electrode for electric discharge electrochemical combined machining, and the processing efficiency of the step-by-step double-electrode combined machining is low.

[0006] According to the problems existing in the prior art, a composite machining head, a machining device comprising the composite machining head and a use method are proposed to solve the above problems. SUMMARY

[0007] The purpose of the present application is to provide a composite machining head, a machining device comprising the composite machining head and a use method to solve the above problems.

[0008] To achieve the above purpose, the present application provides the following solutions:

[0009] A composite machining head comprises:

[0010] A coaxially arranged electric spark electrode and an electrolytic tube electrode, the electric spark electrode is vertically slidingly arranged in the electrolytic tube electrode;

[0011] A flow guide device is used for connecting the electric spark electrode and the tube electrode for electrolysis, the tube electrode for electrolysis is fixed at the bottom of the flow guide device, and the electric spark electrode is movably arranged with the flow guide device;

[0012] The electric spark electrode is hollowly arranged, and a liquid inlet end of the electric spark electrode is used for inputting deionized water;

[0013] The flow guide device is provided with a liquid inlet and a liquid outlet, and the liquid outlet is coaxially sleeved outside the tube electrode for electrolysis;

[0014] The flow guide device and the electric spark electrode are not communicated with each other.

[0015] Optionally, the flow guide device comprises:

[0016] A flow guide sleeve is coaxially fixed at the bottom of the tube electrode for electrolysis, a liquid inlet is arranged on the side wall of the flow guide sleeve, and a cavity is arranged on the inner side of the middle part of the flow guide sleeve;

[0017] A directional shaft is arranged in the cavity, a gap is arranged between the outer side wall of the bottom of the directional shaft and the side wall of the cavity, the gap is communicated with the liquid inlet, and the gap is used for electrolyte flow; and the electric spark electrode is movably arranged in the directional shaft;

[0018] A porous columnar flow divider is coaxially fixed on the inner side of the tube electrode for electrolysis, the porous columnar flow divider is coaxially sleeved outside the electric spark electrode, the electric spark electrode is movably connected with the porous columnar flow divider, a plurality of through holes are arranged on the porous columnar flow divider in a circumferential direction, the liquid inlet end of the through hole is communicated with the gap, and the liquid outlet end of the through hole is used as the liquid outlet.

[0019] Optionally, the outer ring of a rolling bearing is coaxially fixed on the inner side of the bottom of the directional shaft, the outer side of a linear bearing is fixed on the inner side of the inner ring of the rolling bearing, and the inner side of the linear bearing is vertically slid with the electric spark electrode.

[0020] Optionally, the bottom of the flow guide sleeve is fixed with a tube electrode for electrolysis clamping part, and the tube electrode for electrolysis clamping part is used for clamping and fixing one end of the tube electrode for electrolysis.

[0021] Optionally, the tube electrode for electrolysis comprises an electrode body, the electrode body is arranged on the outer side of the porous columnar flow divider, and the outer side of the electrode body is wrapped with an insulating layer.

[0022] A machining device comprising a composite machining head, comprising the composite machining head, and further comprising:

[0023] A machine tool main body and a workpiece moving platform for placing a workpiece to be processed, the workpiece moving platform moving the workpiece to be processed in a horizontal direction;

[0024] A first lifting end and a second lifting end are arranged on the machine tool main body, the first lifting end is rotationally connected with the top of the electric spark electrode through an electric spindle, and the second lifting end is connected with the flow guide device;

[0025] A deionized water supply part, the liquid outlet end of which is communicated with the liquid inlet end of the electric spark electrode;

[0026] An electrolyte supply part, the liquid outlet end of which is communicated with the electrolyte inlet of the flow guide device;

[0027] An electrolyte recovery part, the liquid inlet end of which is communicated with the liquid inlet end of the electrolyte supply part, the liquid inlet end of the electrolyte recovery part is arranged at the movable end of the workpiece moving platform, and the workpiece to be processed is placed inside the liquid inlet end of the electrolyte recovery part;

[0028] An electrolytic machining power supply, which is electrically connected with the workpiece to be processed and the tube electrode for electrolysis;

[0029] An electric spark machining power supply, which is electrically connected with the workpiece to be processed and the electric spark electrode;

[0030] A composite machining control system, which is electrically connected with the first lifting end, the second lifting end, the workpiece moving platform and the electric spindle.

[0031] Optionally, the workpiece moving platform comprises a Y-axis moving workbench and an X-axis moving workbench, the fixed end of the Y-axis moving workbench is fixedly connected with the machine tool main body, the movable end of the Y-axis moving workbench is fixedly connected with the X-axis moving workbench, the movable end of the X-axis moving workbench is provided with a platform for placing the workpiece to be processed, and the platform is fixed with the liquid inlet end of the electrolyte recovery part;

[0032] A fixed end of a workpiece clamp is fixed on the platform, and a movable end of the workpiece clamp is used for clamping the workpiece to be processed to fix it.

[0033] Optionally, the deionized water supply part comprises:

[0034] A deionized water storage tank, the liquid outlet end of which is communicated with the liquid inlet end of the electric spark electrode through a deionized water pump.

[0035] Optionally, the electrolyte supply part comprises:

[0036] An electrolyte storage tank, the liquid outlet end of which is communicated with the electrolyte inlet of the flow guide device through an electrolyte pump;

[0037] The electrolyte recovery part comprises:

[0038] A working liquid tank is fixed on the platform, and an outlet end of the working liquid tank is communicated with an inlet end of the electrolyte storage tank through a filter.

[0039] A method for using a machining device comprising a composite machining head, the machining device comprising:

[0040] The EDM power source is electrically connected to the workpiece and the EDM electrode respectively;

[0041] The electrochemical machining power source is electrically connected to the workpiece and the tube electrode for electrolysis respectively;

[0042] The deionized water supply part is used to provide deionized water for machining to the EDM electrode;

[0043] The electrolyte supply part is used to provide electrolyte for machining to the tube electrode for electrolysis;

[0044] The electrolyte recovery part is used to recover electrolyte containing deionized water;

[0045] The composite machining control system is used to control the first lifting end and the second lifting end to adjust the distance between the EDM electrode and the tube electrode for electrolysis and the surface of the workpiece respectively;

[0046] The composite machining control system is used to control the workpiece moving platform to adjust the horizontal position of the workpiece;

[0047] The composite machining control system is used to control the rotation speed of the electric spindle.

[0048] Compared with the prior art, the present application has the following advantages and technical effects:

[0049] When in use, the present application can maintain the high coaxiality of the feeding and rotation of the EDM electrode inside the tube electrode for electrolysis through the flow guide device, so that the movement trajectories of the two electrodes are completely consistent during the coaxial double-electrode EDM-electrolysis combined machining, and the electrolytic machining can accurately remove the recast layer generated by the EDM machining, thereby avoiding the influence of the recast layer of the EDM machining on the surface integrity of the hole and groove structure, reducing the surface roughness, and improving the machining quality. BRIEF DESCRIPTION OF DRAWINGS

[0050] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments will be briefly introduced. Obviously, the accompanying drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort:

[0051] Figure 1 The whole structure schematic diagram of the composite machining device of the present application;

[0052] Figure 2 The machining process schematic diagram of the composite machining head of the present application;

[0053] Figure 3 The cross-sectional view of the composite machining head of the present application;

[0054] Figure 4 The axonometric view of the composite machining head of the present application;

[0055] Figure 5 The straight hole machining schematic diagram of the composite machining head of the present application;

[0056] Figure 6 The local enlarged view of A in the present application; Figure 5

[0057] Figure 7 The shallow groove machining schematic diagram of the composite machining head of the present application;

[0058] Figure 8 The working cross-sectional view of the end of the double electrodes when machining the shallow groove of the composite machining head of the present application;

[0059] Figure 9 The deep groove machining schematic diagram of the composite machining head of the present application;

[0060] Figure 10 The working cross-sectional view of the end of the double electrodes when machining the deep groove of the composite machining head of the present application;

[0061] ​Wherein, 1, machine tool main body; 2, Y axis movement workbench;3, X axis movement workbench;4, workpiece fixture;5, workpiece to be processed;6, spark machining power supply;7, electrolytic tube electrode;701, insulating layer;702, electrode body;8, spark electrode;9, electric spindle;10, electric spindle clamping part;11, deionized water storage tank;1201, deionized water pump;1202, electrolyte pump;13, flow guide device;1301, directional shaft;1302, flow guide sleeve;1303, rolling bearing;1304, electrolytic tube electrode clamping part;1305, linear bearing;14, Z axis movement workbench;15, electrolyte storage tank;16, electrolytic machining power supply;17, filter;18, working fluid tank;19, porous columnar flow divider;20, first lifting motor;21, second lifting motor;22, double screw rod synchronous belt structure;23, composite machining control system. DETAILED DESCRIPTION

[0062] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0063] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0064] Reference Figures 1 to 10 The present application discloses a composite machining head, comprising:

[0065] The coaxially arranged spark electrode 8 and electrolytic tube electrode 7, the spark electrode 8 is vertically slidingly arranged in the electrolytic tube electrode 7;

[0066] The flow guide device 13 is used for connecting the spark electrode 8 and the electrolytic tube electrode 7, the electrolytic tube electrode 7 is fixedly connected to the bottom of the flow guide device 13, and the spark electrode 8 is movably arranged with the flow guide device 13;

[0067] The spark electrode 8 is hollowly arranged, and the liquid inlet end of the spark electrode 8 is used for inputting deionized water;

[0068] The flow guide device 13 is provided with an electrolyte inlet and an electrolyte outlet, and the electrolyte outlet is coaxially sleeved outside the electrolytic tube electrode 7;

[0069] The flow guide device 13 and the spark electrode 8 are not communicated with each other.

[0070] In use, the application enables the electric spark electrode 8 to maintain high coaxial feeding and rotation inside the tube electrode 7 for electrolysis, so that the two movement tracks are completely consistent during the coaxial double-electrode electric spark electrolysis combined machining, and the electrolytic machining can accurately remove the recast layer generated by the electric spark machining, avoiding the influence of the recast layer of the electric spark machining on the surface integrity of the hole and groove structure, reducing the surface roughness and improving the machining quality. Compared with the step-by-step combined machining process, the device can eliminate the secondary positioning error and repeated positioning time, significantly improving the machining precision and efficiency of the workpiece.

[0071] As an optional embodiment, the flow guide device 13 comprises:

[0072] The flow guide sleeve 1302 is coaxially fixed at the bottom of the tube electrode 7 for electrolysis, the side wall of the flow guide sleeve 1302 is provided with an electrolyte inlet, and the inner side of the middle part of the flow guide sleeve 1302 is provided with a cavity;

[0073] The directional shaft 1301 is axially connected to the inside of the cavity, a gap is provided between the outer side wall of the bottom of the directional shaft 1301 and the side wall of the cavity, the gap is communicated with the electrolyte inlet, and the gap is used for electrolyte flow; the electric spark electrode 8 is movably arranged in the directional shaft 1301;

[0074] The porous columnar flow divider 19 is coaxially fixed to the inner side of the tube electrode 7 for electrolysis, the porous columnar flow divider 19 is coaxially sleeved on the outer side of the electric spark electrode 8, the electric spark electrode 8 is movably connected with the porous columnar flow divider 19, a plurality of through holes are arranged on the porous columnar flow divider 19 in a circumferential direction, the inlet end of the through hole is communicated with the gap, and the outlet end of the through hole is used as an electrolyte outlet.

[0075] As an optional embodiment, the outer ring of the rolling bearing 1303 is coaxially fixed to the inner side of the bottom of the directional shaft 1301, the outer side of the linear bearing 1305 is fixed to the inner side of the inner ring of the rolling bearing 1303, and the inner side of the linear bearing 1305 vertically slides with the electric spark electrode 8.

[0076] As an optional embodiment, the bottom of the flow guide sleeve 1302 is fixed with a tube electrode clamping component 1304 for electrolysis, which is used for clamping and fixing one end of the tube electrode 7 for electrolysis.

[0077] As an optional embodiment, the tube electrode 7 for electrolysis comprises an electrode body 702, the electrode body 702 is axially connected to the outer side of the porous columnar flow divider 19, and the outer side of the electrode body 702 is wrapped with an insulating layer 701.

[0078] The tool electrode is designed according to the structure, shape and size of the machining, the porous columnar flow divider 19 is designed based on the inner diameter of the tube electrode 7 for electrolysis and the outer diameter of the electric spark electrode 8, and the designed tool electrode and the porous columnar flow divider 19 are manufactured.

[0079] The tube electrode 7 for electrolysis comprises an electrode body 702 located at the inner side and an insulating layer 701 located at the outer side, and the electrode body 702 is a hollow structure.

[0080] The porous columnar flow divider 19 is embedded into the inner cavity of the prepared electrode body 702.

[0081] The flow guide device 13 comprises a directional shaft 1301, a flow guide sleeve 1302, a rolling bearing 1303, a tube electrode clamping part 1304 for electrolysis, and a linear bearing 1305.

[0082] The insulated tube electrode 7 for electrolysis is clamped at the bottom end of the flow guide sleeve 1302, the spark electrode 8 penetrates the linear bearing 1305 embedded in the directional shaft 1301 and is fixed to the main shaft 9, and the flow guide sleeve 1302 is installed and matched with the directional shaft 1301.

[0083] The present application ensures that the spark electrode 8 can maintain high coaxiality of feeding and rotation inside the tube electrode 7 for electrolysis during the machining process through the precise cooperation of the rolling bearing 1303 and the linear bearing 1305 in the flow guide device 13, so that the movement trajectories of the two coaxial electrodes are completely consistent during the coaxial double-electrode spark-electrolysis combined machining, and the electrolytic machining can accurately realize the dissolution and removal of the recast layer generated by the spark machining, avoiding the influence of the recast layer of the spark machining on the surface integrity of the hole and groove structure, reducing the surface roughness and improving the machining quality. Compared with the step-by-step combined machining process, the use of the device can eliminate the secondary positioning error and the time-consuming of repeated positioning, significantly improving the machining precision and efficiency of the workpiece.

[0084] The tube electrode 7 for electrolysis is provided with a porous columnar flow divider 19, which can make the electrolyte uniformly diffuse from the center to the edge and flow into the bottom machining gap to form a laminar flow state, greatly reducing the dead water area in the center of the bottom, and playing a role in reducing the accumulation of bubbles and insoluble products generated during machining and strengthening the electrolyte update. At the same time, the flow field and current density distribution in the machining gap are more uniform, the flow field stability and the consistency of the electric field distribution are simultaneously enhanced, the stray corrosion phenomenon is effectively inhibited, and the bottom peak generated during tube electrode electrolytic machining is eliminated, thereby obtaining a high flatness hole and groove structure bottom forming effect.

[0085] A machining device comprising a combined machining head, comprising the combined machining head described above, further comprising:

[0086] A machine tool body 1 and a workpiece moving platform, the workpiece moving platform is used to place the workpiece to be machined 5, and the workpiece moving platform moves the workpiece to be machined 5 in the horizontal direction.

[0087] The first lifting end and the second lifting end are arranged on the machine tool body 1, the first lifting end is rotationally connected with the top of the electric spark electrode 8 through the electric spindle 9, and the second lifting end is connected with the flow guide device 13.

[0088] The deionized water supply part is communicated with the liquid inlet end of the electric spark electrode 8 through the liquid outlet end.

[0089] The electrolyte supply part is communicated with the electrolyte inlet of the flow guide device 13 through the liquid outlet end.

[0090] The electrolyte recovery part is communicated with the liquid inlet end of the electrolyte supply part through the liquid outlet end, the liquid inlet end of the electrolyte recovery part is arranged at the movable end of the workpiece moving platform, and the workpiece to be machined 5 is placed on the inner side of the liquid inlet end of the electrolyte recovery part.

[0091] The electrolytic machining power supply 16 is electrically connected with the electrolytic tube electrode 7 and the workpiece to be machined 5.

[0092] The electric spark machining power supply 6 is electrically connected with the electric spark electrode 8 and the workpiece to be machined 5.

[0093] The composite machining control system 23 is electrically connected with the first lifting end, the second lifting end, the workpiece moving platform and the electric spindle 9.

[0094] As an optional embodiment, the workpiece moving platform comprises a Y-axis moving workbench 2 and an X-axis moving workbench 3, the fixed end of the Y-axis moving workbench 2 is fixedly connected with the machine tool body 1, the movable end of the Y-axis moving workbench 2 is fixedly connected with the X-axis moving workbench 3, and the movable end of the X-axis moving workbench 3 is provided with a platform for placing the workpiece to be machined 5, and the platform is fixed with the liquid inlet end of the electrolyte recovery part.

[0095] The platform is fixed with the fixed end of the workpiece clamp 4, and the movable end of the workpiece clamp 4 is used for clamping the workpiece to be machined 5 to be fixed.

[0096] As an optional embodiment, the deionized water supply part comprises:

[0097] The deionized water storage tank 11 is communicated with the liquid inlet end of the electric spark electrode 8 through the liquid outlet end of the deionized water pump 1201.

[0098] As an optional embodiment, the electrolyte supply part comprises:

[0099] The electrolyte storage tank 15 is communicated with the electrolyte inlet of the flow guide device 13 through the liquid outlet end of the electrolyte pump 1202.

[0100] The electrolyte recovery part comprises:

[0101] The working liquid tank 18 is fixed on the platform, and the liquid outlet end of the working liquid tank 18 is communicated with the liquid inlet end of the electrolyte storage tank 15 through the filter 17.

[0102] The machine tool main body 1, the Y-axis moving workbench 2, the X-axis moving workbench 3, the workpiece clamp 4, the electric spindle 9, the electric spindle clamping component 10, the Z-axis moving workbench 14, the working liquid tank 18, and the composite machining control system 23 constitute a machine tool bed.

[0103] The first lifting end comprises a first lifting motor 20, a slide rod one, a ball screw one, and the electric spindle clamping component 10. The electric spindle clamping component 10 is used as a platform for mounting the electric spindle 9. The four corners of the electric spindle clamping component 10 are respectively provided with the slide rod one which vertically slides. The electric spindle clamping component 10 is threadedly matched with the ball screw one. The output shaft of the first lifting motor 20 is axially connected with the ball screw one. The fixed end of the first lifting motor 20 and the slide rod one are both fixed with the machine tool main body 1. The ball screw one is rotationally matched with the machine tool main body 1.

[0104] The second lifting end comprises the Z-axis moving workbench 14, a second lifting motor 21, a slide rod two, a ball screw two, and a double screw synchronous belt structure 22. The four corners of the Z-axis moving workbench 14 are respectively provided with the slide rod two which vertically slides. The left and right ends of the Z-axis moving workbench 14 are respectively threadedly matched with the ball screw two. The two ball screws two are synchronously rotated through the double screw synchronous belt structure 22. The double screw synchronous belt structure 22 comprises a synchronous wheel and a synchronous belt. The synchronous wheel is axially connected with the ball screw two. The synchronous belt is sleeved outside the two synchronous wheels and is meshed with the synchronous wheel. Any ball screw two is axially connected with the output shaft of the second lifting motor 21. The fixed end of the second lifting motor 21, the slide rod two, and the Z-axis moving workbench 14 are all fixed with the machine tool main body 1. The ball screw two is rotationally matched with the machine tool main body 1.

[0105] The composite machining control system 23 is further electrically connected with the deionized water supply part, the electrolyte supply part, and the electrolyte recovery part. The composite machining control system 23 can independently control the machining processes of the electrochemical machining and the electric spark machining, and the pumping speed and flow size of the deionized water and the electrolyte.

[0106] The deionized water storage tank 11, the deionized water pump 1201, the electrolyte pump 1202, the electrolyte storage tank 15, the filter 17, and the liquid conveying pipeline constitute a working liquid circulating system.

[0107] The tube electrode 7 for electrolysis, the electrochemical machining power supply 16, and the porous column-shaped shunt 19 constitute an electrochemical machining part.

[0108] The electric spark machining power supply 6 and the electric spark electrode 8 constitute an electric spark machining part.

[0109] In use, the negative pole of the electrochemical machining power source 16 is connected to the electric spark electrode 8, and the positive pole is connected to the workpiece 5 to be machined; the negative pole of the electric spark machining power source 6 is connected to the electrolytic tube electrode 7, and the positive pole is connected to the workpiece 5 to be machined; deionized water is pumped into the electric spark electrode 8, and electrolyte is injected into the flow guide device 13, so that the electrolyte enters the machining gap through the uniform distribution holes of the porous columnar flow divider 19;

[0110] The electric spark machining power source 6, the electrochemical machining power source 16, and the electric spindle 9 are started, the machining state is monitored in real time by using the composite machining control system 23, and the axial feeding speed of the electrolytic tube electrode 7 and the electric spark electrode 8 and the rotating speed of the electric spark electrode 8 are independently regulated, so that the workpiece is efficiently and once machined and formed by combining the machining characteristics of the two;

[0111] When the preset machining position is reached, whether the machining state meets the requirements is observed.

[0112] The workpiece is taken out, and the power source and the equipment are sequentially turned off, and the workpiece is cleaned.

[0113] In the present application, the electrolytic tube electrode 7 and the electric spark electrode 8 are connected by different power sources to form a double-current loop, the power source parameters can be independently controlled by using the composite machining control system 23 to change the electric spark discharge frequency and the electrochemical machining current density, and the feeding speed and the rotating speed of the two electrodes can be independently controlled during the machining process, so that the electric spark electrode 8 is fed ahead of the electrolytic tube electrode 7, the electric spark machining is used to punch holes in the base body, and then the electrochemical machining is used to dissolve and recast the layer and the heat-affected layer for hole expansion, so that the electric spark-electrolytic heterogeneous synchronous machining is realized, and compared with single electrochemical machining, the machining quality and the machining efficiency of the workpiece are significantly improved by using the present application.

[0114] A method for using a machining device comprising a composite machining head, the method comprising:

[0115] The electric spark machining power source 6 is electrically connected to the workpiece 5 to be machined and the electric spark electrode 8, respectively;

[0116] The electrochemical machining power source 16 is electrically connected to the workpiece 5 to be machined and the electrolytic tube electrode 7, respectively;

[0117] The deionized water supply part is used to provide machining deionized water for the electric spark electrode 8;

[0118] The electrolyte supply part is used to provide machining electrolyte for the electrolytic tube electrode 7;

[0119] The electrolyte recovery part is used to recover electrolyte containing deionized water;

[0120] The composite machining control system 23 is used to control the first lifting end and the second lifting end to adjust the distance between the electric spark electrode 8 and the electrolytic tube electrode 7 and the surface of the workpiece 5 to be machined, respectively.

[0121] The composite machining control system 23 is used to control the workpiece moving platform to adjust the horizontal position of the workpiece 5 to be machined;

[0122] The composite machining control system 23 is used to control the rotating speed of the electric spindle 9.

[0123] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0124] The above-described embodiments are only preferred modes of the present application, and are not intended to limit the scope of the present application. Various modifications and improvements to the technical solutions of the present application made by those of ordinary skill in the art without departing from the design spirit of the present application shall fall within the protection scope of the present application as defined by the claims.

Claims

1. A composite processing head, characterized in that, include: The electric spark electrode (8) and the electrolytic tube electrode (7) are coaxially arranged, and the electric spark electrode (8) is vertically slidably arranged inside the electrolytic tube electrode (7); A flow guiding device (13) is used to connect the electric spark electrode (8) and the electrolysis tube electrode (7). The electrolysis tube electrode (7) is fixed to the bottom of the flow guiding device (13), and the electric spark electrode (8) is movably disposed with the flow guiding device (13). The electric spark electrode (8) is hollow and the liquid inlet end of the electric spark electrode (8) is used to input deionized water; The flow guiding device (13) is provided with an electrolyte inlet and an electrolyte outlet, and the electrolyte outlet is coaxially sleeved on the outside of the electrolysis tube electrode (7); The flow guiding device (13) is not connected to the electric spark electrode (8).

2. The composite processing head according to claim 1, characterized in that, The flow guiding device (13) includes: The bottom of the guide sleeve (1302) is coaxially fixed with the electrolysis tube electrode (7). The electrolyte inlet is opened on the side wall of the guide sleeve (1302). A cavity is provided on the inner side of the middle part of the guide sleeve (1302). A directional shaft (1301) is axially connected to the cavity at its top. A gap is provided between the bottom outer wall of the directional shaft (1301) and the side wall of the cavity. The gap is connected to the electrolyte inlet and is used for electrolyte flow. The electric spark electrode (8) is movably disposed within the directional shaft (1301). A porous columnar distributor (19) is coaxially fixed to the inner side of the electrolytic tube electrode (7). The porous columnar distributor (19) is coaxially sleeved on the outer side of the electric spark electrode (8). The electric spark electrode (8) is movably connected to the porous columnar distributor (19). The porous columnar distributor (19) has several circumferentially arranged through holes. The liquid inlet end of the through hole is connected to the gap, and the liquid outlet end of the through hole is used as the electrolyte outlet.

3. The composite processing head according to claim 2, characterized in that: The outer ring of the rolling bearing (1303) is coaxially fixed on the inner side of the bottom of the directional shaft (1301). The outer side of the linear bearing (1305) is fixed to the inner side of the inner ring of the rolling bearing (1303). The inner side of the linear bearing (1305) slides vertically with the electric spark electrode (8).

4. The composite processing head according to claim 2, characterized in that: The bottom of the flow guide sleeve (1302) is fixedly connected to an electrolytic tube electrode clamping component (1304), which is used to clamp and fix one end of the electrolytic tube electrode (7).

5. The composite processing head according to claim 1, characterized in that: The electrolytic tube electrode (7) includes an electrode body (702), which is axially connected to the outside of the porous columnar shunt (19), and the outside of the electrode body (702) is wrapped with an insulating layer (701).

6. A machining apparatus comprising a composite machining head, comprising the composite machining head according to any one of claims 1-5, characterized in that, Also includes: The machine tool body (1) and the workpiece moving platform are used to place the workpiece to be processed (5) and the workpiece moving platform causes the workpiece to be processed (5) to move in the horizontal direction. The machine tool body (1) is provided with a first lifting end and a second lifting end. The first lifting end is rotatably connected to the top of the electric spark electrode (8) through an electric spindle (9), and the second lifting end is connected to the flow guiding device (13). The deionized water supply unit has its outlet end connected to the inlet end of the electric spark electrode (8). The electrolyte supply section has its outlet end connected to the electrolyte inlet of the flow guiding device (13); The electrolyte recovery unit has an outlet end connected to the inlet end of the electrolyte supply unit. The inlet end of the electrolyte recovery unit is located at the movable end of the workpiece moving platform, and the workpiece to be processed (5) is placed inside the inlet end of the electrolyte recovery unit. An electrolytic machining power supply (16) is electrically connected to the electrolytic tube electrode (7) and the workpiece (5) to be processed; The electrical discharge machining power supply (6) is electrically connected to the electrical discharge electrode (8) and the workpiece (5) to be processed; The composite machining control system (23) is electrically connected to the first lifting end, the second lifting end, the workpiece moving platform and the electric spindle (9).

7. A processing apparatus comprising a composite processing head according to claim 6, characterized in that: The workpiece moving platform includes a Y-axis motion worktable (2) and an X-axis motion worktable (3). The fixed end of the Y-axis motion worktable (2) is fixedly connected to the machine tool body (1), and the movable end of the Y-axis motion worktable (2) is fixedly connected to the X-axis motion worktable (3). The movable end of the X-axis motion worktable (3) is provided with a platform for placing the workpiece (5) to be processed. The platform is fixed to the inlet end of the electrolyte recovery section. The platform is fixed with a fixed end of a workpiece clamp (4), and the movable end of the workpiece clamp (4) is used to clamp the workpiece (5) to be processed and fix it.

8. A processing apparatus comprising a composite processing head according to claim 6, characterized in that, The deionized water supply unit includes: A deionized water storage tank (11) is provided, and the outlet of the deionized water storage tank (11) is connected to the inlet of the electric spark electrode (8) via a deionized water pump (1201).

9. A processing apparatus comprising a composite processing head according to claim 7, characterized in that, The electrolyte supply unit includes: The electrolyte storage tank (15) has its outlet end connected to the electrolyte inlet of the flow guiding device (13) via an electrolyte pump (1202); The electrolyte recovery unit includes: A working liquid tank (18) is fixed on the platform. The outlet of the working liquid tank (18) is connected to the inlet of the electrolyte storage tank (15) through a filter (17).

10. A method of using a machining apparatus comprising a composite machining head, comprising the machining apparatus comprising a composite machining head as described in any one of claims 6-9, characterized in that, include: The electrical discharge machining power supply (6) is electrically connected to the workpiece to be processed (5) and the electrical discharge electrode (8) respectively; The electrolytic machining power supply (16) is electrically connected to the workpiece to be processed (5) and the electrolytic tube electrode (7), respectively; The deionized water supply unit is used to supply deionized water for processing to the electrical discharge electrode (8); The electrolyte supply unit is used to supply processing electrolyte to the electrolytic tube electrode (7); The electrolyte recovery unit is used to recover electrolyte containing deionized water; The composite machining control system (23) is used to control the first lifting end and the second lifting end to adjust the distance between the electric spark electrode (8) and the electrolytic tube electrode (7) and the surface of the workpiece (5) to be processed, respectively; The composite machining control system (23) is used to control the workpiece moving platform to adjust the horizontal position of the workpiece (5) to be processed; The rotational speed of the electric spindle (9) is controlled by the composite machining control system (23).

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