JPH0527822A - Cad/cam device - Google Patents

Abstract

PURPOSE:To provide a CAD/CAM device which can automatically set a moving route of a machining electrode and producing the NC data on the moving route of a shank after correcting automatically the moving route of the machining electrode for the engraving discharge machining based on the core shift extent. CONSTITUTION:A machining electrode moving route setting means sets the moving route of a machining electrode 31 based on a metallic mold drawing 21 including plural machining electrode diagrams 22 set at a machining original point and a machining position, the coordinates BX and BY of the machining original point, and the center coordinates (CX1, CY1) and (CX2, CY2) of the diagrams 22 respectovely. A core shift extent calculation means which calculates the core shift extent, i.e., the shift of centers between the electrode 31 and a shank 32, a shank center coordinate setting means which decides the center coordinates of the shank 32 based on the calculated core shift extent, a shank moving route setting means which corrects the moving route of the electrode 31 and sets the NC data on the moving route of the shank 32 based on the center coordinates of the shank 32 are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a CAD / CAM device, and more specifically, a moving path of a machining electrode for engraving a workpiece from a CAD diagram of a machining electrode attached to a shank of a die-sinking electric discharge machine. CAD / C to generate
CA that corrects the moving path of the machining electrode by the AM device and the misalignment amount and creates NC data of the moving path of the shank.
It relates to a D / CAM device.

[0002]

2. Description of the Related Art In a die-sinking electric discharge machine, a machining electrode is attached to a shank, and the machining electrode is moved by the shank to machine a workpiece into a desired shape. A CAD / CAM device is used to create NC data of a movement path of a shank in such a die-sinking electric discharge machine.

By the way, if the amount of misalignment between the center of the shank and the center of the machining electrode is 0, the target movement path of the machining electrode =
Although it is the movement path of the shank, since the misalignment amount is not generally 0, it is necessary to obtain the shank movement path by correcting the movement path of the target machining electrode with the misalignment amount.

Next, a conventional procedure for creating NC data of the movement path of the shank will be described. FIG. 6 is a schematic diagram of an electrode contact detection device (34) for measuring the amount of misalignment between the center of the shank and the center of the machining electrode. (33) is a reference electrode (3 with a spherical tip.
3). (32) is a shank. (31) is a machining electrode attached to the shank (32).

The operator, as shown in FIG. 7 and FIG.
The spherical (radius R) tip of the reference electrode (33) is brought into contact with the processing electrode (31) attached to the shank (32), and the coordinate (Q) of the center (33P) of the reference electrode (33) at that time.
The contact distance {DX, DY} is obtained from the coordinates (SX, SY) of the center (32P) of the shank (32) and (X, QY). DX = | SX-QX | DY = | SY-QY | (31P) indicates the center of the machining electrode (31).

Then, the detected contact distance {DX, DY}
From the radius (R) of the reference electrode (33) and the length (LX) in the X direction and the length (LY) of the machining electrode (31) in the Y direction,
The operator calculates the misalignment amount {ΔX, ΔY} as follows. ΔX = DX- (R + LX / 2) ΔY = DY- (R + LY / 2)

Next, the operator considers the position of the reference electrode (33) as viewed from the shank (32) and corrects the center position of the machining electrode by the amount of misalignment {ΔX, ΔY},
Find the center coordinates of the shank. That is, as shown in FIGS. 7 and 8, the position of the reference electrode (33) when detecting the contact distance (DX) is on the −X side when viewed from the shank (32).
On the −Y side, and as shown in FIG. 9, if the center position of the machining electrode is (CX1, CY1), the center coordinate of the shank is obtained by setting CX1 ′ = CX1 + ΔX CY1 ′ = CY1 + ΔY. Further, as shown in FIG. 9, if the center position of the machining electrode is (CX2, CY2), the center coordinates of the shank are obtained by setting CX2 ′ = CX2 + ΔX CY2 ′ = CY2 + ΔY. In addition, in FIG. 9, (21) is a die diagram showing a target machining shape of the workpiece by the die-sinking electric discharge machining. (22) is a machining electrode diagram arranged at the machining position. (BX, BY)
Is the processing origin. (D1), (D2), (D3)
Is the moving path of the target machining electrode.

After obtaining the center coordinates of the shank, the operator executes CAD / C as shown in the flowchart of FIG.
The AM device is activated and NC data of the movement path of the shank is created. That is, in step (R1), the operator CAD / CAM the machining origin (BX, BY) and the center coordinates (CX1 ', CY1'), (CX2 ', CY2') of the shank and the movement path connecting each point. Type in the device,
Remember.

Next, in step (R2), the moving height (Z
1), the lower limit height (Z2) when the machining electrode is lowered by rapid traverse, the machining depth (Z) for cutting the workpiece with the machining electrode
3) Information such as Z direction is input to the CAD / CAM device and stored.

Next, in step (R3), CAD / C
The AM device creates NC data of the movement path of the shank.

[0011]

Conventional CAD / CAM
In the device, in order to create NC data of the movement path of the shank, the machining origin (BX, BY) and the center coordinates (CX1 ', CY1'), (CX2 ', CY2') of the shank.
And the movement paths (D1), (D2), (D
It is necessary for the operator to input 3) and 3), and there is a problem that the input work is complicated.

Further, since the operator calculates the center coordinates of the shank by correcting the center position of the machining electrode with the misalignment amount, there is a problem that it takes time and a calculation error is likely to occur.

A first object of the present invention is to provide a CAD / CAM device which does not complicate the input work for creating NC data of the movement path of a shank. A second object of the present invention is to provide a CAD / CAM apparatus which corrects the center position of the machining electrode by the amount of misalignment and calculates the center coordinates of the shank accurately in a short time.

[0014]

According to a first aspect of the present invention, according to the present invention, a CAD / CAM device for creating NC data of a moving path of a machining electrode of a die-sinking electric discharge machine is arranged at a machining origin and a machining position. A machining electrode movement path setting means for setting a movement path of the machining electrode based on a die drawing including a plurality of machining electrode diagrams, coordinates of the machining origin, and center coordinates of the plurality of machining electrode diagrams is provided. CAD to
/ CAM device is provided.

According to a second aspect of the present invention, the present invention relates to N of a moving path of a shank for mounting a machining electrode of a die-sinking electric discharge machine.
In a CAD / CAM device for creating C data, a core deviation amount calculating means for calculating a core deviation amount, which is a deviation between the center of the machining electrode and the center of the shank, from the contact distance detected by the electrode contact detection device, and the calculated core. Shank center coordinate setting means for setting the center coordinate of the shank from the deviation amount, and shank movement path setting means for correcting the movement path of the machining electrode based on the center coordinate of the shank and setting NC data of the movement path of the shank. CA characterized by having
A D / CAM device is provided.

[0016]

With respect to the first aspect, the CAD / CA of the present invention is provided.
In the M apparatus, a machining electrode movement path setting means is based on a machining origin, a die drawing including a plurality of machining electrode diagrams arranged at a plurality of machining positions, coordinates of the machining origin, and center coordinates of the plurality of machining electrode diagrams. The movement path of the machining electrode is set by. Therefore, the work of inputting the movement route by the operator is omitted.

With respect to the second aspect, the CAD /
In the CAM device, the misalignment amount calculating means calculates the misalignment amount, which is the misalignment of the center of the machining electrode with respect to the center of the shank, from the contact distance detected by the electrode contact detection device.
The shank center coordinate setting means sets the center coordinates of the shank from the calculated misalignment amount. Then, the moving path of the machining electrode is corrected based on the set center coordinates of the shank, and the shank moving path setting means sets the N of the moving path of the shank.
Create C data. Therefore, the correction calculation by the operator is omitted, and a calculation error does not occur.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail based on the embodiments shown in the drawings. The present invention is not limited to this. FIG. 1 shows the CAD / C of the present invention.
It is a structure conceptual diagram of one Example of an AM device. This CAD /
The CAM device (1) includes an information input unit (2), an information storage unit (3), an information analysis unit (4), and an information display control unit (5).
And a display section (6).

Next, referring to the flowchart of FIG. 2, the operation will be described in order. In step (S1), FIG.
When the information of the mold drawing as shown in FIG. 2 is input by the information input unit (2), the information of the mold drawing is stored in the information storage unit (3), the information analysis unit (4) and the information display control unit (5). Is displayed on the display unit (6). In the die drawing, a die drawing (21) showing a target machining shape of a workpiece by die-sinking electric discharge machining and a machining electrode diagram (22) are arranged at machining positions. The machining electrode diagram (22) has center lines (L1) (L2) (L3) (L4) in the X and Y directions.

At step (S2), the processing origin (BX,
BY) and the center coordinates (CX1, CY) of the machining electrode diagram (22)
1) and (CX2, CY2) are input by the information input unit (2) and stored in the information storage unit (3).

Next, the amount of misalignment, which is the deviation of the center of the machining electrode from the center of the shank, is calculated. First, in step (S3), an electrode contact detection device (3
4) using a reference electrode (3
The contact distance {DX, DY} from the center of 3) to the center of the shank (32) is detected. (31) is the shank (3
It is the processing electrode attached to 2).

That is, as shown in FIGS. 7 and 8, the operator attaches the machining electrode (3) attached to the shank (32).
The spherical (radius R) tip of the reference electrode (33) is brought into contact with 1), and the center (33P) of the reference electrode (33) at that time
Coordinates (QX, QY) and center of shank (32) (32
P) coordinates (SX, SY) to contact distance {DX, DY}
Ask for. DX = | SX-QX | DY = | SY-QY | (31P) indicates the center of the machining electrode (31).

Next, in step (S4), the detected contact distance {DX, DY} and the radius (R) of the reference electrode (33).
The length (LX) in the X direction and the length (LY) in the Y direction of the machining electrode (31) are input by the information input unit (2) and stored in the information storage unit (3). Then, the information analysis unit (4) calculates the misalignment amount {ΔX, ΔY} as follows based on these input information. ΔX = DX- (R + LX / 2) ΔY = DY- (R + LY / 2)

In step (S5), the reference electrode (33)
Which side is seen from the shank (32) is input by the information input unit (2) and stored in the information storage unit (3). Then, the information analysis unit (4) causes the misalignment amount {Δ
The center coordinates (CX1 ', CY1') of the shank (32) are obtained according to the flowchart of FIG. 4 based on the information on the position of the reference electrode (33) and X, ΔY}.

That is, in step (S21) of FIG. 4, the reference electrode (3) for detecting the contact distance (DX) is used.
It is determined whether the position of 3) is the + X side or the −X side as viewed from the shank (32). If the position of the reference electrode (33) is on the + X side, CX1 ′ = CX1−ΔX is set in step (S22), and the process proceeds to step (S24). On the other hand, on the −X side, CX1 ′ = CX1 + ΔX is set in step (S23), and the process proceeds to step (S24). Then, in step (S24), the position of the reference electrode (33) when detecting the contact distance (DY) is + Y when viewed from the shank (32).
Side or -Y side. The position of the reference electrode (33) is +
If it is on the Y side, CY1 ′ = CY in step (S25).
1-ΔY. On the other hand, if it is the −Y side, step (S
In step 26), CY1 ′ = CY1 + ΔY. Similarly, the center coordinates (CX2 ', CY2') of the shank (32)
Also ask.

Returning to FIG. 2, in the step (S6), information about the Z direction is input by the information input section (2) and stored in the information storage section (3), as in the conventional step (R2). . Next, in step (S7), information is obtained based on the die drawing including the plurality of machining electrode diagrams stored in step (S1), the coordinates of the machining origin, and the center coordinates of the plurality of machining electrode diagrams. The analysis unit (4) sets the movement path of the machining electrode. Further, based on various information stored in the information storage unit (3), the moving path of the machining electrode is corrected by the amount of misalignment, and NC data of the moving path of the shank shown in FIG. 12 is created. It should be noted that correction of the misalignment amount is omitted at the processing origin (BX, BY), since no inconvenience occurs during processing. However, correction may be added to the processing origin (BX, BY).

In FIG. 5, a general system configuration diagram of a CAD / CAM device is shown. This configuration has a CPU (11) for processing shape information and a memory (12) for storing various information.
A printer (13) for recording shapes and characters, and a paper tape input / output device (14) for punching various information on a paper tape and reading various information from the punched paper tape.
A CRT display section (15) for displaying shapes and characters, a keyboard (16) for inputting information, and a mouse (or tablet) for inputting information necessary for drawing on the CRT display section (15). ) (17), an auxiliary storage device (18) for writing information to be stored and reading the stored information, and a bus (19) for connecting these components.

[0028]

According to the CAD / CAM device of the present invention, since the moving path of the machining electrode is automatically set, the operator's input work becomes easy. Further, since the misalignment amount is calculated and the center coordinate of the shank is automatically set to create the NC data of the movement path of the shank, there is no calculation error due to manual calculation, and accurate NC data can be created in a short time. . Also, the work load of the operator is reduced.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the configuration of an embodiment of a CAD / CAM device according to the present invention.

FIG. 2 is a flowchart of the operation of the apparatus of FIG.

3A and 3B are exemplary views of a die diagram and a machining electrode diagram according to the apparatus of FIG.

FIG. 4 is a flowchart for obtaining the center coordinates of the shank according to the device of FIG.

FIG. 5 is a system configuration diagram of a general CAD / CAM device.

FIG. 6 is a side view of the electrode contact detection device.

FIG. 7 is an explanatory diagram for detecting the X component of the contact distance.

FIG. 8 is an explanatory diagram for detecting the Y component of the contact distance.

FIG. 9 is an explanatory diagram of a processing origin and a moving path related to NC data creation.

FIG. 10 is a flowchart of the operation of a conventional CAD / CAM device.

FIG. 11 is an explanatory diagram of Z-direction information related to NC data creation.

FIG. 12 is a view showing an example of NC data.

[Explanation of symbols]

1 CAD / CAM device 2 Information input section 3 Information storage 4 Information analysis section 5 Information display controller 6 Display 21 mold diagram 22 Machining electrode diagram 31 Processing electrode 32 shanks 33 Reference electrode

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 22, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

Next, a conventional procedure for creating NC data of the movement path of the shank will be described. FIG. 6 is a schematic diagram of an electrode contact detection device (34) for measuring the amount of misalignment between the center of the shank and the center of the machining electrode. (33), Ru Oh <br/> the reference electrodes tip portion is spherical. (32) is a shank. (31) is a machining electrode attached to the shank (32).

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0027

[Correction method] Change

[Correction content]

FIG . 5 shows a general system configuration diagram of a CAD / CAM device. This configuration has a CPU (11) for processing shape information and a memory (12) for storing various information.
A printer (13) for recording shapes and characters, and a paper tape input / output device (14) for punching various information on a paper tape and reading various information from the punched paper tape.
If, CRT display for displaying the shape or character (15), a keyboard (16) for inputting information, CRT display
A mouse (or tablet) (17) for inputting information necessary for drawing on the container (15), an auxiliary storage device (18) for writing and reading the information to be saved, and these It consists of a bus (19) connecting the components.

[Procedure 3]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the configuration of an embodiment of a CAD / CAM device according to the present invention.

FIG. 2 is a flowchart of the operation of the apparatus of FIG.

3A and 3B are exemplary views of a die diagram and a machining electrode diagram according to the apparatus of FIG.

FIG. 4 is a flowchart for obtaining the center coordinates of the shank according to the device of FIG.

FIG. 5 is a system configuration diagram of a general CAD / CAM device.

FIG. 6 is a side view of the electrode contact detection device.

FIG. 7 is an explanatory diagram for detecting the X component of the contact distance.

FIG. 8 is an explanatory diagram for detecting the Y component of the contact distance.

FIG. 9 is an explanatory diagram of a processing origin and a moving path related to NC data creation.

FIG. 10 is a flowchart of the operation of a conventional CAD / CAM device.

FIG. 11 is an explanatory diagram of Z-direction information related to NC data creation.

FIG. 12 is a view showing an example of NC data.

[Explanation of reference symbols] 1 CAD / CAM device 2 Information input unit 3 Information storage unit 4 Information analysis unit 5 Information display control unit 6 Display unit 21 Mold diagram 22 Machining electrode diagram 31 Machining electrode 32 Shank 33 Reference electrode 34 Electrode contact detection Equipment

Claims (2)

[Claims] 1. A CAD / CAM device for creating NC data of a moving path of a machining electrode of a die-sinking EDM machine, a machining origin, a die drawing including a plurality of machining electrode drawings arranged at machining positions, and the machining origin. A CAD / CAM device, comprising: machining electrode movement path setting means for setting a movement path of the machining electrode based on the coordinates of the above and the center coordinates of the plurality of machining electrode diagrams. 2. A CAD / Cad which creates NC data of a moving path of a shank to which a machining electrode of a die-sinking EDM machine is attached.
In the CAM device, a core deviation amount calculating means for calculating a core deviation amount, which is a deviation between the center of the machining electrode and the center of the shank, from the contact distance detected by the electrode contact detection device, and a center coordinate of the shank from the calculated deviation amount. And a shank movement path setting means for correcting the movement path of the machining electrode based on the center coordinates of the shank and setting NC data of the movement path of the shank. CAD / CAM device that does.