JP2003295917A - Machining control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem of a combination of a conventional CAD/CAM device and an NC control machining device, where the design of an article by the CAD device and the preparation of a machining condition and an NC machining program by the CAM device are performed for the design and an NC control machining based on the design in order to manufacture the article. <P>SOLUTION: This device consists of a three-dimensional CAD device to generate three-dimensional design CAD data having at least shape information, position information and accuracy information for the given article, and an NC control machining device equipped with a CNC control device of multiple axes having three axes or more. The CNC control device comprises an analysis device for the generated three-dimensional CAD data to be input, and a machining condition and NC program automatic preparation device to prepare an NC machining program from the analyzed three-dimensional CAD data and a database of the machining condition and the NC program, and performs the NC control machining for the desired article based on the three-dimensional CAD data. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CNC-controlled machining center, wire or die-sinking electric discharge machining.
The present invention relates to a machining control device capable of creating an NC machining program for operating the CNC control device that is more suitable for machining.

[0002]

2. Description of the Related Art In a CNC-controlled machine tool, such as die-sinking electric discharge machining, a CAD device is used to design a machining electrode and a workpiece based on specifications given by a designer, and based on the design. The machining electrode and the work piece are manufactured by using various machining, electric discharge machining, heat treatment, etc., and the manufactured machining electrode and the work piece together with their design drawings, electric discharge machining instructions, etc. It will be handed over to the EDM operator. The operator attaches the work electrode or its holding pallet to the table in a predetermined manner according to the above-mentioned design drawing or machining instruction sheet, and then centers the work electrode and positions the work object. , And relative positioning regarding the machining position between the machining electrode and the workpiece is sequentially performed.

Then, an NC machining program is created by using a machining condition search / program automatic creation device which differs not only depending on the type of machine but also depending on the manufacturer. Although the program creating apparatus is "automatic" or the like, in the case of die-sinking electric discharge machining, for example, the evaluation of the machining result and the shape of the machining electrode are divided into several types, respectively, and the operator The machining conditions are selected and the machining program is generated based on the result of the selective use.

[0004]

However, the above-mentioned points of "dividing into several kinds" and "the operator selects from among them" and the like have recently made the demand for the finishing result severe. From the place where it is coming, it is becoming more complicated and difficult, and the number of condition input items is increasing, but selecting an appropriate machining condition, and N
It has become difficult to quickly create a C machining program without error.

More specifically, a part of it will be described in detail. A conventional automatic program creating device has a machining condition searching function and an automatic NC program creating function from drawings, design CAD data, etc. The information regarding the processed shape was manually entered by the operator as follows.・ Classify the machining shape into several patterns in advance,
The operator decides which to use and selects it. It is difficult to visually grasp the shape before and after processing. -The operator inputs the swing method based on the shape of the machining electrode. -In the case of machining with an open side surface, the operator judges and changes the swing method or corrects the NC program. -In the case of machining using a machining electrode with a sharp tip, it is difficult to judge its shape, it is not possible to output suitable machining conditions, and abnormal wear is likely to occur.・ When the workpiece has a pilot hole, its shape cannot be grasped accurately, so it is not possible to generate a suitable machining condition / NC program. Whether the prepared hole is a through hole and the prepared hole diameter for each depth cannot be accurately determined.・ I do not know whether the set item is the optimum processing method. It seems that there are problems such as.

Many of the problems described above include design information, graphic data, etc., even though the machining electrode or the object to be machined or manufactured is various kinds of three-dimensional bodies. Since it is given by the drawing and data of the two-dimensional compound leaf, it was difficult to understand visually, which sometimes hindered accurate judgment. Therefore, 3 of approximate drawing and data
A three-dimensional CAD device capable of obtaining drawings and data capable of three-dimensionalization, that is, solid (three-dimensional: Solid) modeling and capable of handling three-dimensional shape information as a CAD device has been developed and spread. There is.

However, in such a conventional three-dimensional CAD apparatus, the design and manufacture of the solid model based on the shape information of the article are performed particularly in a visually easily recognizable state. Although various data such as area, volume, and manufacturing can be obtained, processing condition search /
The three-dimensional CAD data (design data) for searching the machining conditions and creating the NC machining program using the three-dimensional CAM device of the NC machining program automatic creation device is still insufficient.

Therefore, according to the present invention, in addition to various shape information which can be visually visually recognized and easily determined, three-dimensional design CAD data including position information and accuracy information for machining are processed, machining conditions and NC. Conversion of design CAD data to machining information for NC program creation, by using when creating NC machining programs by machining condition search / NC program automatic creation device using program database
Further, it is intended to make the NC program creation more appropriate contents and to make it possible to create an appropriate NC machining program quickly more automatically, easily and accurately.

More specifically, for example, it is as follows. -The shape before and after processing can be visually presented. -Because the shape is accurately known, the appropriate swing direction can be automatically determined. -Since it is possible to determine that the side surface is open, it is possible to generate an appropriate processing condition and NC processing program.・ Because the shape and dimensions of the pilot hole can be obtained, suitable processing conditions,
An NC program can be generated.・ The maximum processing direction can be calculated from the projected area of the electrode viewed from each direction. -Selecting machining conditions based on 3D machining shape-NC program generation to improve machining speed and suppress abnormal wear of electrodes. -Processing position information can be visually created by three-dimensional CAD. Easy fine adjustment. When it is passed to the machining condition retrieval / NC program automatic generation system, an appropriate NC program is automatically generated from visual information.

[0010]

The above-mentioned objects of the present invention are as follows.
(1) At least shape information for a given article,
It is composed of a three-dimensional CAD device capable of generating three-dimensional design CAD data having position information and accuracy information, and an NC control processing device equipped with a multi-axis CNC control device having three or more axes. The controller of the CNC inputs the generated 3
3D CAD data analysis device and the analysis 3D CAD
A processing control device including a processing condition / NC program automatic creation device for creating an NC processing program from a database of data and processing conditions / NC program, and performing NC control processing of a desired article based on the three-dimensional CAD data. It is achieved by

Further, the above-mentioned object of the present invention is: (2) The computer of the computer of the three-dimensional CAD device and the computer of the operation unit of the multi-axis CNC control device have a common computer control program (Operating System).
This is achieved by the processing control device according to (1), which operates on m).

Further, the above-mentioned object of the present invention is: (3) The NC machining program produced and outputted from the machining condition / NC program automatic producing apparatus is deciphered by an NC program deciphering section, and the deciphering NC program is executed by an execution command section. This is achieved by the processing control device described in (1) or (2) above, which outputs to the control drive unit of each actuator.

Further, the above-mentioned object of the present invention is: (4) The three-dimensional CAD data converted into processing information for creating the NC processing program by the above-mentioned processing condition / NC program automatic creating apparatus is directly output to the execution command section. Then, the control drive unit of each actuator is controlled, and the machining control device according to (3) that executes NC control machining is achieved.

Further, the above-mentioned object of the present invention is: (5) The machining condition / NC program automatic creation device is a device for die-sinking electrical discharge machining, and the database of the machining conditions / NC program is die-sinking electrical discharge. This is achieved by the processing control device described in (1), (2), (3) or (4), which is a database for processing.

FIG. 1 is a block diagram showing an embodiment of the overall configuration in the case where the machining control device of the present invention is a die-sinking electric discharge machine, which includes a CPU, a main memory device (RAM), and an external memory device (for example, HD), an input device 2 (for example, a reading means such as a keyboard and a mouse, and an external storage medium), a display device 1 (for example, a CRT or LCD), and a computer including various interfaces. The inside is shown as a block diagram of a function of a plurality of system software in module units, and is connected to a multi-axis NC control processing device 20 described later in relation to a control operation device of the CNC control device 10.

Reference numeral 14 denotes an input / output interface / control operation unit, and 12 denotes an input from the input device 2 directly or via the operation unit 14, which is designed by drawing and data using an external three-dimensional CAD device described later. 3D design CAD data analysis device including shape information, position information, and accuracy information of the target object to be obtained.
The dimensional CAD device can also be used. Reference numeral 11 is a database that stores software for machining condition retrieval / NC program creation for die-sinking electrical discharge machining, and 13 is a three-dimensional design C output by the three-dimensional CAD data analyzer 12.
A so-called three-dimensional C that automatically creates machining conditions and NC machining programs from AD data and data in the database 11.
A machining condition / NC program automatic creation device having an AM function, and a computer control program (Operating System) used as system hardware by these softwares are omitted.

The machining condition / NC program created by the machining condition / NC program automatic creation device 13 is sent from the control operation unit 14 to the NC decoding unit 21 of the multi-axis NC control machining device 20 to move the machining electrode. Decoded into processing information such as. Then, this decoding processing information is used as a command from the execution command unit 22 for each axis servo amplifier 24X, 24X for driving the servo motor of the multi-axis actuator.
It is sent to the motion controller that controls Y and 24Z. In addition, the electric power supply device 4 and the machine control 5 related to the die-sinking electric discharge machine, for example, ATC (automatic tool electrode exchange), or the operation command to the actuator such as the elevation control 5 of the machining tank is output from the execution command unit 22. It is provided with an interface 25 and the like.

Reference numeral 3 is a three-dimensional CAD device for design which is provided separately from the machining control device having the above-mentioned overall structure. The three-dimensional CAD data analysis device 12 mounted on the machining control device is three-dimensional. In the case of a device having the function of a CAD device, the analysis device 12 can also be used as a device, but in order to avoid the inconvenience of the design work at the installation location of the processing control device, the device 3 is usually installed separately. Is provided as
The three-dimensional CAD data obtained by the design is sent from the input device 2 to the three-dimensional CAD data analysis device 12 via an appropriate storage medium or online if necessary.

The machining information created by the machining condition / NC program automatic generation device 13 after obtaining the design CAD data is generated by temporarily generating the machining condition / NC program as described above, and the control operation unit of the CNC controller 10 is operated. 14 to NC
In addition to the route to the NC decoding unit 21 of the control processing device 20,
The conversion control information from the design CAD data obtained by the processing condition / NC program automatic creation device 13 can be directly sent to the execution command section 22 to operate the NC control processing device 20. In addition, the execution data of actuators such as servo motors and machine controls, current position and operating status are
The motion controller 23 and the interface 25 output a signal which is fed back to the CNC control device 10 side to control or correct the processing information.

When the design information of the article to be obtained is given by a drawing or command data, the three-dimensional CA
Articles to be obtained by using a design function (for example, Solid Works: registered trademark) in which each analysis software of shape information, position information, and accuracy information is added to the design function of the standard three-dimensional specification of the D device 3 And / or a solid model that is complementary to the article is created, and the article is a composite contour of one or more of, for example, MC machining, milling, grinding, wire electrical discharge machining, or die-sinking electrical discharge machining. It is decided whether to manufacture by processing, or to manufacture a mold for manufacturing the article by press molding or injection molding.

At this time, together with analysis data such as the shape and size of the solid model of the standard three-dimensional specification, as the shape information, for example, electrode manufacturing information, electrode size,
Electrode material, workpiece material, electrode projected area, processing area, processing volume, etc. The position information includes, for example, a table position, an electrode / workpiece positioning position, a processing position, and a processing depth. As the accuracy information, for example, the overall dimensional accuracy, surface finishing accuracy, surface roughness, etc. are output as the data of the design information or are acquired so that they can be output.

When the electric discharge machining is wire electric discharge machining, most of the electrode shape information added to the standard machining electrode information is replaced with the plate thickness (shape) information of the workpiece. Also, corner accuracy information and taper accuracy information are added to the accuracy information as necessary.

A storage medium storing three-dimensional design CAD data having the above-mentioned shape information, position information, and accuracy information is in charge of electrical discharge machining together with machining electrodes and workpieces manufactured based on the design. Is handed over to the worker together with the processing instruction or instruction sheet. So the worker
The supplied machining electrode and workpiece are attached to the spindle or machining table of a required electric discharge machine, and the storage medium of the design CAD data is stored in the three-dimensional CAD data analysis device 12 of the CNC controller 10 or the analysis device 12 thereof. Replaced by 3
A three-dimensional CAD device is used for analysis, and a machining condition / NC machining program is created by interactively operating the machining condition / NC program automatic generation device 13.

[0024]

However, in the case of the present invention, not only the information and data of the shape of the article to be obtained by processing etc. are not only three-dimensional information and data, but also the above-mentioned shape information and position information. , And since it has accuracy information, the operator can display the shape before processing and the shape after processing visually and accurately grasp the sharpness of the electrode shape, The machining surface area and volume and the projected area of the electrode are accurately grasped, and the machining conditions and the NC program automatic preparation device 13 are based on the three-dimensional CAD data which can be visually displayed with such information. Since the NC machining program is created, more appropriate machining conditions / NC machining program can be generated.

Further, it is difficult with the conventional method, for example: ・ Since it is possible to perform offset adjustment by recognizing the shape of side surface opening processing (shape where the side surface with respect to the projection surface is missing), It is possible to adjust the machining current at the machining start depending on the relationship between the depth of and the discharge area.・ If the tip of the electrode is sharp (ribbed electrode, etc.),
Since the shape can be recognized and the discharge area can be grasped, the optimum machining current can always be selected. -For machining of workpieces with through holes and multi-stepped holes, it is possible to accurately grasp the change in the discharge area as the machining progresses, and control the selection of the optimum machining current.

Further, since the projected area of the electrode from the desired processable direction can be known, it is possible to propose the process from an appropriate direction together with the estimated processing time and the like. Further, for example, the area of the workpiece, the processing mode, the reference position, the processing depth, the actual depth, the material combination, the projected area, the surface roughness, the electrode reduction, the reduction amount, the minimum gradient, the prepared hole, the area. (Prepared hole), depth (prepared hole), etc. can be automatically input together with the design three-dimensional CAD data, and the data input work can be simplified. Further, the shape information and the position information can be expressed not only as a character string but also as a picture, and the data can be visualized, and there is a high possibility that confirmation can be facilitated and speeded up, and false recognition can be reduced.

Further, in the apparatus of the present invention, the control operation section of the multi-axis NC control processing apparatus 20 has a three-dimensional design CAD data analysis function having shape information, position information, and accuracy information, and the analysis CAD data. And a machining condition / NC program database to automatically create a machining condition / NC machining program from a CNC controller having a three-dimensional CAM function, or the three-dimensional design CAD data of the CNC controller. 3D CAD with shape information, position information, and accuracy information for the part with analysis function
Since it is configured as a device, since NC control machining can be commanded and executed from three-dimensional design CAD data having shape information, position information, and accuracy information, the work amount of the site worker of NC control machining is greatly reduced. In addition, it is possible to more reliably perform the processing that conforms to the design concept.

[Brief description of drawings]

FIG. 1 is a block diagram showing the overall configuration of an embodiment of a machining control device according to the present invention.

[Explanation of symbols]

1 display device 2 input device 3 three-dimensional CAD having shape, position, and accuracy information
Device 4 EDM power supply device 5 EDM related machine control 10 CNC control device 11 Machining condition / NC program database 12 Three-dimensional design CAD data analysis device 13 Machining condition / NC program automatic creation device 14 Control operation unit 20 NC control machining device 21 NC decoding unit 22 Execution command unit 23 Motion controller 24X, 24Y, 24Z Each axis servo amplifier 25 Interface

Claims (5)

[Claims] 1. A three-dimensional design C having at least shape information, position information, and accuracy information for a given article.
It is composed of a three-dimensional CAD device capable of generating AD data and an NC control processing device equipped with a multi-axis CNC control device having three or more axes. The CNC control device analyzes the generated three-dimensional CAD data to be input. Device and the analysis three-dimensional C
A processing condition / NC program automatic creating apparatus for creating an NC processing program from AD data and a database of processing conditions / NC programs, and performing NC control processing of a desired article based on the three-dimensional CAD data. A processing control device characterized by being present. 2. A computer for the three-dimensional CAD device,
The computer of the operation unit of the multi-axis CNC control unit has a common computer control program (Operati).
The processing control apparatus according to claim 1, which operates on an ngSystem). 3. An NC machining program produced and output from the machining condition / NC program automatic production apparatus is deciphered by an NC program deciphering section, and the deciphering NC program is outputted to a control drive section of each actuator by an execution instructing section. The processing control device according to claim 1 or 2, wherein. 4. The control condition drive unit of each actuator is controlled by directly outputting the three-dimensional CAD data converted into the processing information for the NC processing program creation by the processing condition / NC program automatic creation apparatus to the execution command unit. , NC control processing is performed, The processing control apparatus of Claim 3 characterized by the above-mentioned. 5. The machining condition / NC program automatic creation device is a device for die-sinking electrical discharge machining, and the database of the machining condition / NC program is a database for die-sinking electrical discharge machining. Claims 1, 2, 3
Alternatively, the processing control device according to item 4.