KR100564159B1 - Cnc small hole electric discharge machine and usung method thereof - Google Patents

Abstract

The present invention relates to a CNC thin blood discharge machine, and in particular, includes a workpiece characteristic selection menu and a stepwise processing current selection menu in a condition setting section, and a machining depth detection sensor in a discharge machining section, so that the workpiece is relatively small from a workpiece surface to a predetermined processing depth. By supplying and processing the current value, it prevents the strong discharge on the workpiece surface to improve the surface roughness and prevent the expansion of blood near the surface to improve the precision of the surface processing of the workpiece where the blood is precisely processed. will be.

The present invention provides a condition setting unit for selecting processing conditions such as electrode type, processing voltage, pulse width, and processing current, a data storage unit in which the processing conditions are classified into detailed data, and the processing condition data is activated from the data storage unit. In the CNC thin blood discharge machine comprising a control part, an electric discharge machining part which performs machining according to the machining condition data, and a display part showing the machining condition data and the machining status, the condition setting part separates the workpiece characteristic selection menu and the machining process into two stages. It includes a process separation menu that can be set by, the discharge processing unit is provided with a sensor for detecting the processing depth.

Fine Blood Discharge Machine, CNC, Workpiece Selection Menu, Stepping Current Selection Menu

Description

Improved surface finish of workpiecesCNC thin blood discharge machine and its use {CNC SMALL HOLE ELECTRIC DISCHARGE MACHINE AND USUNG METHOD THEREOF}

1 is a perspective view showing a CNC surface treatment machine for improving the workpiece surface precision according to the present invention,

2 is a block diagram showing a CNC three-cell discharge machine according to the present invention,

3 is a flow chart showing a method of using a CNC three-cell discharge machine according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1: X, Y, Z axis feeder 2: Machining electrode (drilling member)

3: Workbench 4: Input part (keyboard, mouse)

5: Display part (monitor) J: JIG

W: workpiece

10: Condition setting part 11: workpiece characteristic selection menu

12: Process Separation Menu 12 ': Process current selection menu step by step

20: data storage unit 30: operation control unit

40: discharge processing part 41: sensor

50: display unit

The present invention relates to a CNC thin-cell discharge machine, and more particularly, to improve the workpiece surface machining accuracy to prevent the strong discharge on the surface of the workpiece and the expansion of blood near the surface by adjusting the supplied current value, and It is about how to use.

In general, electric discharge processing is performed by putting a metal (workpiece) into an anode (+) and a working electrode into a cathode (-) in an insulating liquid, applying an electric current to the electrode, and repeating pulsed discharge. It is a machining method using high temperature and erosion of the workpiece surface.

In addition, the electric discharge machine is classified into a wire cut electric discharge machine and a mold electric discharge machine. Among these, the electric discharge machine is a machine using a total electrode, and is mainly used for the production of molds. It consists of servo mechanism and processing mechanism.

On the other hand, the CNC electric discharge machine is a manual processing of a series of machining operations by a computer, a condition setting unit for selecting a processing condition, a data storage unit where the processing conditions are classified into data, a storage control unit for activating the processing condition data, and machining And a display unit for indicating a state.

Particularly, the processing conditions selected by the condition setting unit include processing voltage, electrode type, ON / TIME and OFF / TIME pulse width, processing process, jump and other special specifications. It is appropriately set according to the use of the work.

The machining using the CNC electric discharge machine is capable of processing a desired shape to a relatively good degree without being restricted by hardness, viscosity, etc., if the workpiece has conductivity, and can be processed without applying mechanical force to the electrode and the workpiece. have.

In addition, since unmanned operation is possible, the machined surface is uniform, and there is almost no impossible machining, fine holes, grooves, screw holes, and bent machining are also possible, so that it is called as a pronoun of precision processing in the mold, electronics, and nuclear industries.

On the other hand, in the case of blood thinning using a CNC electric discharge machine in the past, the surface roughness was not good because it is collectively processed from the surface of the workpiece to the completion of processing with one processing current value selected by the condition setting unit.

In other words, if the continuous blood processing is continued from the surface of the workpiece, the effect of strong discharge on the surface accumulates for a long time, and the surface roughness worsens, and the blood surface near the surface is expanded, so that the hole size at the completion of processing cannot be obtained.

The present invention has been made to solve the problems of the prior art as described above, the operator can arbitrarily set the machining current value according to the machining depth of the workpiece in the manual of the CNC electric discharge machine, specifically the current value up to a predetermined machining depth The purpose of this invention is to provide a CNC fine blood discharge machine and its use method.

In order to achieve the above object, the CNC surface treatment machine for improving the precision of the workpiece surface

Condition setting unit to select processing conditions such as electrode type, processing voltage, pulse width, processing current, etc., data storage unit where processing conditions are classified into detailed data, and operation control unit that activates processing condition data from data storage unit, processing In the CNC thin blood discharge machining machine comprising an electric discharge machining part which performs machining according to the condition data, and a display part which shows the machining condition data and the machining state,

The condition setting unit includes a workpiece separation selection menu and a process separation menu which can be set by separating the machining process into two stages.

The discharge processing unit is characterized in that a sensor for detecting the processing depth is provided.

In addition, the process separation menu is characterized in that the stepped processing current selection menu that can be set by separating the processing current in two steps according to the processing depth detected by the sensor.

On the other hand, the method for improving the workpiece surface machining accuracy of the present invention is a method of using the CNC hemostatic discharge machining,

Set the characteristics of the workpiece by using the workpiece characteristic selection menu,

Setting the first stage machining current supplied from the workpiece surface to the first machining depth by using the stage machining current selection menu to a current value smaller than the second stage machining current supplied from the first machining depth to the completion of machining. It features.

And, the first processing depth range for supplying the first stage processing current is characterized in that up to 0.5 ~ 3mm from the workpiece surface.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing an improved CNC surface treatment machine according to the present invention, Figure 2 is a block diagram showing a CNC three-cell discharge machine according to the present invention, Figure 3 is a CNC three-cell discharge machine according to the present invention A flow chart showing how to use it.

As shown in Figure 1, the CNC surface treatment machine for improving the workpiece surface machining of the present invention is basically X, Y, Z axis feeder (1), processing electrode (drilling member) 2, A power supply device (not shown), a work table 3, an input unit (keyboard, mouse) 4, a display unit (monitor) 5 and the like are provided.

In the drawings, reference numerals J and W denote workpieces that are a jig and a workpiece, respectively.

Specifically, as shown in Figure 2, the CNC three-cell discharger of the present invention is composed of a condition setting unit 10, data storage unit 20, operation control unit 30, the discharge processing unit 40 and the display unit 50 do.

The condition setting unit 10 selects a processing voltage, an electrode (drilling member) type, an ON / TIME pulse width, an OFF / TIME pulse width, a machining process, a jump, and other special specifications according to the type and use of the work W. Menu is configured.

The condition setting unit 10 includes a workpiece separation selection menu 11 to be processed and a process separation menu 12 which can be set (selected and input) by separating the machining process into two stages.

The workpiece characteristic selection menu 11 is configured to input a size (thickness, width, etc.), a material and a purpose of the workpiece, which are characteristics of the workpiece.

In addition, the process separation menu 12 is provided with a stepped processing current selection menu 12 ′ in which the cutting current can be set in two steps according to the processing depth detected by the sensor 41.

In addition to the step-by-step machining current selection menu 12 ', the process separation menu 12 further includes a menu for setting other step-by-step machining voltages, ON / TIME pulse widths, OFF / TIME pulse widths, and other processing conditions. desirable.

 The data storage unit 20 is a machining voltage set in the condition setting unit 10, a machining voltage, an electrode (drill member) type, a workpiece (W) characteristic, and a machining current under a process separated by the process separation menu 12. Etc. are classified and stored.

The operation control unit 30 sequentially activates the data of the step-by-step processing conditions classified and stored in the data storage unit 20 to control and process the discharge processing unit 40 and the display unit 50 to process and display the data.

The discharge machining unit 40 applies a direct current power source to the machining electrode (drill member) and the workpiece W according to the stepwise processing conditions stored in the data storage unit 20 under the control of the operation control unit 30, thereby substantially performing primary processing. And secondary processing.

In particular, the discharge machining unit 40 is provided with a sensor 41 connected to the Z-axis feeder (up and down feed) to detect the machining depth, the sensor 41 sends the machining depth to the operation control unit 30 The boundaries of the processing conditions can be distinguished.

The display unit 50 basically displays a selection menu for selecting the processing conditions in the condition setting unit 10, and the processing paths and processing conditions during the step-by-step processing conditions and actual processing under the control of the operation control unit 30. The overall contents of the discharge machining are displayed.

Looking at the method of using the CNC hemostatic discharge machine of the present invention, as shown in Figure 3, first select and input the characteristics of the workpiece (W) using the workpiece characteristic selection menu 11 of the condition setting unit 10 ( S100).

After the process separation menu 12 is selected (S200), the first stage machining current and the second stage machining current are selected and input using the stepwise machining current selection menu 12 ′ (S300).

At this time, the first stage machining current supplied from the workpiece surface to the first machining depth (range of 0.5 to 3 mm from the workpiece surface) having a predetermined machining depth is the second stage machining current supplied from the first machining depth to the completion of machining. Enter a smaller current value.

If the first processing depth is less than 0.5mm from the surface of the workpiece, the effect of strong discharge on the surface of the workpiece is intact, and if it is larger than 3mm, the processing of the blood is non-uniform, so that it is suitable for the material and the use of the workpiece. Accordingly set in the range of 0.5 to 3 mm from the workpiece surface.

The step-by-step machining current selection menu 12 ′ is preferably provided with a menu for specifically inputting the first machining depth, and is selected in advance when the thickness, material, or purpose of the workpiece W is selected. The processing depth may be configured to be activated by the operation control unit 30.

In addition to the step-by-step machining current, other machining conditions such as step-by-step machining voltage, ON / TIME pulse width, OFF / TIME pulse width, and machining process are also selected and input.

Then, the primary processing proceeds according to the first step processing conditions (processing current) (S400), the sensor 41 of the discharge processing unit 40 continuously detects the processing depth and sends it to the operation control unit 30 ( S500)

If the machining depth sent by the sensor 41 is greater than the first machining depth (a machining depth set in the range of 0.5 to 3 mm from the workpiece surface), the secondary machining proceeds according to the second stage machining condition (machining current) (S600).

When the blood is completely formed to the bottom of the workpiece by the secondary processing by the current value lower than the primary processing, the processing is completed (S700), and the finished workpiece (W) is separated from the discharge processor.

Therefore, it is possible to systematically manual the operation of performing the primary processing at a predetermined depth (a small current value up to the first processing depth) from the surface of the work W, and the remaining secondary processing to a higher current value.

Thus, the surface roughness of the workpiece can be remarkably improved by preventing the relatively strong discharge from occurring continuously near the workpiece surface.

In addition, the blood generated through the work can be prevented from expanding near the surface of the work so that the blood can be processed to have a vertically uniform diameter (dimension).

The CNC fine blood discharge machine and the method of using the improved workpiece surface machining accuracy of the present invention configured as described above can be set arbitrarily by the operator in the manual of the CNC electric discharge machine according to the machining depth of the workpiece, and specifically, the current value up to a predetermined machining depth. Because it can be set to a little lower, it can prevent the strong discharge on the surface of the workpiece to improve the surface roughness and prevent the expansion of the blood near the surface, which has the useful effect of precision processing.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made within the spirit and scope of the present invention, and such changes or modifications are to the accompanying patents. Will have to belong to the claims.

Claims (4)

Condition setting unit to select processing conditions such as electrode type, processing voltage, pulse width, processing current, etc., data storage unit where processing conditions are classified into detailed data, and operation control unit that activates processing condition data from data storage unit, processing In the CNC thin blood discharge machining machine comprising an electric discharge machining part which performs machining according to the condition data, and a display part which shows the machining condition data and the machining state, The condition setting unit includes a workpiece separation selection menu and a process separation menu which can be set by separating the machining process into two stages. The electric discharge machining is CNC fine blood discharge processing machine to improve the precision of the workpiece surface, characterized in that provided with a sensor for detecting the machining depth. The method of claim 1, The process separation menu is a CNC fine blood discharge processing machine for improving the precision of the workpiece surface, characterized in that the process current selection menu that can be set by separating the processing current in two stages according to the processing depth detected by the sensor. In the use of the CNC three-cell discharge machine according to claim 2, Set the characteristics of the workpiece by using the workpiece characteristic selection menu, Setting the first stage machining current supplied from the workpiece surface to the first machining depth by using the stage machining current selection menu to a current value smaller than the second stage machining current supplied from the first machining depth to the completion of machining. How to improve the machining of the surface of the workpiece. The method of claim 3, wherein The first machining depth range for supplying the first stage machining current ranges from 0.5 to 3 mm from the workpiece surface.

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