A vertical machining center for electro-combined machining

Abstract

The present invention discloses a vertical machining center for electric composite machining, including: a base, a saddle, a column, a spindle box, a spindle and a conductive worktable, in which an electric machining tool or a metal cutting tool with a standard shank structure can be installed, and an electro-hydraulic interaction unit is also included; the electro-hydraulic interaction unit includes a driving device and a transmission device arranged on the spindle box, a support plate arranged on the transmission device and driven by the driving device to move up and down along the Z-axis direction, and a first electric connector and a working fluid ring spray connector arranged on the support plate, wherein the first electric connector is connected to a cathode power supply, and the working fluid ring spray connector is connected to a working fluid external flushing device. Since the machining center disclosed in the present invention is provided with an electro-hydraulic interaction unit, by providing the electro-hydraulic interaction unit, it is possible to respectively install an electric machining tool and a metal cutting tool on the same spindle box, thereby realizing short arc machining and metal cutting machining of a workpiece, thereby improving machining efficiency and machining accuracy.

Description

Technical Field

[0001] The invention relates to the technical field of machine tools, in particular to a vertical machining center used for electric composite machining. Background Art

[0002] Short arc machining technology: refers to an electric cutting method that uses an excited short arc discharge group or spark discharge group generated between two electrodes to erode metal or non-metallic conductive materials under the action of a working medium of a certain proportion of pressurized gas-liquid mixture. It belongs to the category of electric machining technology in the special machining industry and is a new type of strong electron flow, ion flow, and arc flow cutting electric machining technology.

[0003] At present, the parts of aviation products are characterized by small batches of multiple varieties, complex process, and the widespread use of difficult-to-process materials. Therefore, there are common bottlenecks in the manufacturing process, such as long manufacturing cycle, large amount of material removal, and low processing efficiency. In order to improve the processing efficiency and processing accuracy of complex aviation products, it is an urgent problem to be solved. Summary of the invention

[0004] The invention provides a vertical machining center for electric composite machining, which solves the problem that the existing machining center cannot realize the combination of short arc machining and metal cutting machining, resulting in low machining efficiency.

[0005] The technical means adopted by the present invention are as follows:

[0006] A vertical machining center for electric composite machining, comprising: a base, a saddle, a column, a spindle box, a spindle and a conductive worktable, wherein an electric machining tool or a metal cutting tool with a standard tool holder structure can be installed in the spindle, and an electric-hydraulic interaction unit is also included;

[0007] The electro-hydraulic interaction unit includes a driving device and a transmission device arranged on the spindle box, a support plate arranged on the transmission device and driven by the driving device to move up and down along the Z-axis direction, and a first electrical connector and a working fluid ring spray connector arranged on the support plate, wherein the first electrical connector is connected to the cathode power supply, and the working fluid ring spray connector is connected to the working fluid external flushing device.

[0008] Furthermore, it also includes a composite tool magazine arranged on one side of the column, in which an electric machining tool and a metal cutting tool are arranged.

[0009] Furthermore, it also includes a first tool magazine and a tool exchange line, which are located on both sides of the column; the first tool magazine is provided with a metal cutting tool and the tool exchange line is provided with an electric machining tool, or the first tool magazine is provided with an electric machining tool and the tool exchange line is provided with a metal cutting tool.

[0010] Furthermore, it also includes a first tool magazine and a second tool magazine, wherein the first tool magazine and the second tool magazine are placed on both sides of the column, the first tool magazine is provided with a metal cutting tool and the second tool magazine is provided with an electric machining tool, or the first tool magazine is provided with an electric machining tool and the second tool magazine is provided with a metal cutting tool.

[0011] Furthermore, it also includes an automatic tool changing system for changing tools.

[0012] Compared with the prior art, the vertical machining center for electric composite machining described in the present invention has the following beneficial effects: since an electro-hydraulic interaction unit is provided, the electro-hydraulic interaction unit can be used to respectively install electric machining tools and metal cutting tools on the same spindle box, thereby realizing short arc machining (rough machining) and metal cutting (finishing machining) of the workpiece, thereby improving machining efficiency and machining accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view of a vertical machining center for electric composite machining disclosed in Example 1 of the present invention;

[0014] Figure 2 A top view of a vertical machining center for electric composite machining disclosed in Example 1 of the present invention;

[0015] Figure 3 It is an axial view of a vertical machining center for electric composite machining disclosed in Embodiment 1 of the present invention;

[0016] Figure 4 It is a structural diagram of the electro-hydraulic interaction unit in the present invention;

[0017] Figure 5 It is a structural diagram of the electric machining tool in the present invention;

[0018] Figure 6 It is a front view of a vertical machining center for electric composite machining disclosed in Example 2 of the present invention;

[0019] Figure 7 A top view of a vertical machining center for electro-combined machining disclosed in Embodiment 2 of the present invention;

[0020] Figure 8 It is an axial view of a vertical machining center for electric composite machining disclosed in Example 2 of the present invention;

[0021] Fig. 9 It is a front view of a vertical machining center for electric composite machining disclosed in Example 3 of the present invention;

[0022] Fig.10 A top view of a vertical machining center for electro-combined machining disclosed in Example 3 of the present invention;

[0023] Fig.11 This is an axial view of a vertical machining center for electro-combined machining disclosed in Example 3 of the present invention.

[0024] In the figure: 10, base, 11, saddle, 12, spindle box, 13, spindle, 14, conductive workbench, 15, column, 2, electro-hydraulic interaction unit, 20, drive device, 21, transmission device, 22, support plate, 23, first electrical connector, 24, working fluid ring spray connector, 25, guide rail, 26, lead screw, 30, compound tool magazine, 31, first tool magazine, 32, tool exchange line, 33, second tool magazine, 4, electro-machining tool, 40, standard tool holder interface, 41, insulating transition plate, 42, rotating axis, 43, brush fixing plate, 44, brush, 45, second electrical connector, 46, ring spray connector, 47, electrode, 48, ring spray outlet, 49, electro-machining tool housing, 5, metal cutting tool, 6, automatic tool changing system. DETAILED DESCRIPTION

[0025] Example 1

[0026] like Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, the vertical machining center for electric composite machining disclosed in the present invention comprises: a base 10, a saddle 11, a column 15, a spindle box 12, a spindle 13 and a conductive worktable 14, wherein an electric machining tool or a metal cutting tool with a standard tool holder structure can be installed in the spindle 13, and also comprises an electric-hydraulic interaction unit 2;

[0027] The electro-hydraulic interaction unit 2 includes a driving device 20 and a transmission device 21 arranged on the spindle box 12, a support plate 22 arranged on the transmission device 21 and driven by the driving device 20 to move up and down along the Z-axis direction, and a first electrical connector 23 and a working fluid ring spray connector 24 arranged on the support plate 22, wherein the first electrical connector 23 is connected to the cathode power supply, and the working fluid ring spray connector 24 is connected to the working fluid external flushing device.

[0028] Specifically, Figure 1 As shown, the saddle 11 is arranged on the base 10 and can move forward and backward along the Y axis, the conductive workbench 14 is arranged on the saddle 11 and can move left and right along the X axis. In this embodiment, the conductive workbench is a cradle-type workbench, and a column 15 is provided at one end of the base 10. A spindle box 12 that can move up and down along the Z axis is provided on the column 15, and a spindle 13 is provided on the spindle box 12.

[0029] The electro-hydraulic interaction unit 2 is also provided on the spindle box 12. Figure 3 The dotted box in the figure represents the electro-hydraulic interaction unit, such as Figure 4As shown, the electro-hydraulic interaction unit 2 includes a driving device 20 and a transmission device 21 arranged on the spindle box 12, a support plate 22 arranged on the transmission device 21 and driven by the driving device 20 to move up and down along the Z axis, and a first electrical connector 23 and a working fluid ring spray connector 24 arranged on the support plate 22. Specifically, the driving device 20 and the transmission device 21 can be directly installed on the spindle box or installed on the spindle box through a transition plate. The driving device 20 can be a power device such as a motor, a cylinder, a hydraulic cylinder or an electric cylinder. When the driving device When 20 is a rotary power device such as a motor, the transmission device 21 is a linear actuator such as a guide rail 25 and a lead screw 26, and the support plate 22 is arranged on the guide rail through a structure such as a slider, one end of the lead screw is connected to the motor output shaft, and is connected to the support plate through a structure such as a nut, and the motor can drive the support plate to move up and down along the Z axis on the guide rail through the lead screw nut. When the driving device is a power device such as a cylinder, a hydraulic cylinder or an electric cylinder, the transmission device 21 is a mechanism such as a guide rail, and the output rod of the cylinder (hydraulic cylinder or electric cylinder) is connected to the support plate and can drive the support plate to move up and down along the Z axis on the guide rail. A first electrical connector 23 and a working liquid ring spray connector 24 are arranged on the support plate, and the first electrical connector 23 is connected to the cathode power supply for short arc processing, and the working liquid ring spray connector 24 is connected to the working liquid external flushing device for short arc processing.

[0030] Furthermore, a composite tool magazine 30 and an automatic tool changing system 6 are provided on one side of the column 15 , and the composite tool magazine 30 is provided with an electric machining tool 4 and a metal cutting tool 5 .

[0031] like Figure 5 As shown, the electric machining tool includes a standard tool holder interface 40, an insulating transition plate 41, a rotating shaft 42, a brush 44, a second electrical connector 45, an annular spray connector 46, an electrode 47, an annular water outlet 48 and an electric machining tool housing 49. The rotating shaft 42 is installed in the electric machining tool housing 49 through a bearing, one end of the rotating shaft is connected to the electrode, and the other end is connected to the standard tool holder interface through the insulating transition plate. The brush 44 is installed in the electric machining tool housing through a brush fixing plate 43 and contacts the rotating shaft. The electric machining tool housing is provided with an annular water outlet at one end of the electrode, and a connecting plate is also provided on the electric machining tool housing. A second electrical connector and an annular spray connector are provided on the connecting plate. The second electrical connector is connected to the brush, and the annular spray connector is connected to the annular water outlet. The standard tool holder interface can be connected to the spindle to realize the rotation of the spindle driving electrode through the insulating transition plate and the rotating shaft. The second electrical connector can be connected to the first electrical connector in the electro-hydraulic interaction unit, thereby realizing the power supply of the cathode power supply used for short arc machining to the brush of the electro-hydraulic machining tool. The ring spray connector can be connected to the working fluid ring spray connector of the electro-hydraulic interaction unit, and then the working fluid in the working fluid external flushing device is sprayed to the electrode through the ring spray outlet. The insulating transition plate can electrically isolate the standard tool holder interface from the rotating shaft, thereby realizing the electrical isolation of the rotating shaft and the spindle.

[0032] The process of processing a workpiece in a vertical machining center for electric composite machining disclosed in the present invention is as follows: a workpiece blank is fixed on a conductive workbench, an electric machining tool and a metal cutting tool are provided in a composite tool magazine, and the spindle box moves to the automatic tool change point of the composite tool magazine under the control of a numerical control system, and the spindle is automatically changed through the automatic tool change system. At this time, the electric machining tool is replaced on the spindle through the automatic tool change system. The driving device in the electro-hydraulic interaction unit drives the support plate to move downward along the Z axis, so that the first electrical connector on the support plate is connected to the second electrical connector on the electric machining tool, and the working fluid annular spray connector is connected to the annular spray connector on the electric machining tool. The movement of the spindle box can then be controlled by the numerical control system to realize short arc machining of the workpiece blank by the spindle through the electric machining tool, and short arc machining can realize rapid rough machining of the workpiece blank. After rough machining of the workpiece blank, the electro-hydraulic interactive unit is separated from the electric machining tool, and the CNC system controls the spindle box to move to the automatic tool change point. The automatic tool change system completes the switching between the electric machining tool and the metal cutting tool, and then the workpiece is finely machined by the metal cutting tool under the control of the CNC system.

[0033] The vertical machining center for electric composite machining disclosed in the present invention is equipped with an electric-hydraulic interaction unit, thereby realizing automatic switching between electric machining tools and metal cutting tools, thereby realizing short arc machining (rough machining) and metal cutting machining (finishing machining) of the workpiece through one workpiece positioning, thereby improving machining efficiency and machining accuracy.

[0034] Example 2

[0035] like Figure 6 , Figure 7 and Figure 8 The second embodiment of the vertical machining center for electric composite machining disclosed in the present invention is shown. The difference between this embodiment and the first embodiment is that a composite tool magazine 30 is provided on one side of the column 15 in the first embodiment. Figure 8 The dotted box in the figure represents the electro-hydraulic interaction unit.

[0036] In this embodiment, a first tool magazine 31 is provided on one side of the column, a tool exchange line 32 is provided on the other side of the column, and an automatic tool change system 6 is also provided on the side where the first tool magazine is provided, a metal cutting tool is provided in the first tool magazine and an electric machining tool is provided on the tool exchange line, or an electric machining tool is provided in the first tool magazine and a metal cutting tool is provided on the tool exchange line. The CNC system can control the spindle box to switch the tool between the first tool magazine and the tool exchange line, thereby completing the short arc machining and metal cutting machining of the workpiece.

[0037] Example 3

[0038] like Fig. 9 , Fig.10 and Fig.11 The third embodiment of the vertical machining center for electric composite machining disclosed in the present invention is shown. The difference between this embodiment and the first embodiment is that a composite tool magazine 30 is provided on one side of the column 15 in the first embodiment. Fig.11 The dotted box in the figure represents the electro-hydraulic interaction unit.

[0039] In this embodiment, the first tool magazine 31 and the second tool magazine 33 are respectively provided on both sides of the column, and the first tool magazine is provided with metal cutting tools and the second tool magazine is provided with electric machining tools, or the first tool magazine is provided with electric machining tools and the second tool magazine is provided with metal cutting tools. The CNC system can control the spindle box to switch tools between the first tool magazine and the second tool magazine through the automatic tool changing system, thereby completing short arc machining and metal cutting machining of the workpiece.

[0040] The above embodiments are all described based on a five-axis vertical machining center, but the present invention can also be a three-axis or four-axis vertical machining center.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A vertical machining center for electro-combined machining, comprising: A base, a saddle, a column, a spindle box, a spindle and a conductive worktable, wherein an electric machining tool or a metal cutting tool having a standard tool holder structure can be installed in the spindle, characterized in that: it also includes an electro-hydraulic interaction unit; The electro-hydraulic interaction unit includes a driving device and a transmission device arranged on the outer wall of the spindle box, a support plate arranged on the transmission device and driven by the driving device to move up and down along the Z-axis direction, and a first electrical connector and a working fluid ring spray connector arranged on the support plate, the first electrical connector is connected to the cathode power supply, the working fluid ring spray connector is connected to the working fluid external flushing device, and the driving device can drive the support plate to move up and down along the Z-axis direction to achieve the connection or separation of the first electrical connector and the working fluid ring spray connector with the second electrical connector and the ring spray connector on the electric machining tool installed in the spindle.

2. The vertical machining center for electric composite machining according to claim 1, characterized in that: It also includes a composite tool magazine arranged on one side of the column, in which an electric machining tool and a metal cutting tool are arranged.

3. The vertical machining center for electric composite machining according to claim 1, characterized in that: It also includes a first tool magazine and a tool exchange line, which are located on both sides of the column; the first tool magazine is provided with a metal cutting tool and the tool exchange line is provided with an electric machining tool, or the first tool magazine is provided with an electric machining tool and the tool exchange line is provided with a metal cutting tool.

4. The vertical machining center for electric composite machining according to claim 1, characterized in that: It also includes a first tool magazine and a second tool magazine, wherein the first tool magazine and the second tool magazine are placed on both sides of the column, the first tool magazine is provided with a metal cutting tool and the second tool magazine is provided with an electric machining tool, or the first tool magazine is provided with an electric machining tool and the second tool magazine is provided with a metal cutting tool.

5. The vertical machining center for electric composite machining according to any one of claims 2 to 4, characterized in that: An automatic tool changing system is also included for changing tools.

Images