JPH06102292B2 - Rough cutting method by NC processing device connected with digitizing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, while performing a copying operation by a digitizing device, operates an NC processing device in accordance with the copying operation, and at the same time, executes an NC program by an NC program.
The present invention relates to a rough cutting method in which operations of a processing device are overlapped.

[0002]

2. Description of the Related Art Conventionally, when a mold is roughly cut using an end mill or a face mill, an NC program for rough cutting is conventionally created, and an NC processing device is driven by the NC program to make a tool in an XY plane. There is a machining method in which a circular motion is performed and the object is slowly lowered in the Z-axis direction.

However, it takes a considerable amount of time to create the NC program, and in the case of a model shape in which the shape of the die is not quantified, it is difficult to create the NC program. Is going by.

[0004]

However, in the rough cutting of the mold, the load fluctuation is large and the cutting conditions are not stable.
Therefore, the operator manually performs the copying process,
Although the C machining device is often operated, it is not an efficient machining method to manually perform all the roughing machining operations.

Therefore, it is an object of the present invention to provide a working method with good working efficiency when performing rough cutting of a die.

[0006]

In view of the above object, the present invention provides a digitizing device that traces a mother die with a tracer, and outputs a position signal of movement of a feed shaft and a displacement signal of the tracer by the tracing operation for a predetermined time. A digitizing data signal representing a master shape is arithmetically output from the two detection signals by capturing at every interval, and the digitizing data signal is converted into a moving pulse signal corresponding to a manual handle pulse signal,
The converted moving pulse signal is input to an interface that accepts a manual handle pulse signal of the NC processing device, and the manual automatic simultaneous mode of the NC processing device is used to
An NC machining device connected to a digitizing device, characterized in that a command operation by a C program and a command action from the digitizing device are superposed to perform rough cutting of a workpiece by the NC machining device. To provide a rough cutting method.

[0007]

The NC processing apparatus used in the method of the present invention has an interface for inputting a manual handle pulse signal so as to be operated by the manual handle. Therefore, the digitizing data signal generated from the digitizing device is converted into a moving pulse signal corresponding to the pulse signal generated by the manual handle, and the moving pulse signal is input to the interface. As a result, the NC machining device is operated according to the copying operation by the manual operation or the approach, and at the same time, the NC program allows the tool to perform only a locus such as a simple circular motion by the NC program, and the NC automatic machining device has an automatic operation. Efficient rough cutting is performed by superimposing both operations in the simultaneous mode.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the embodiments shown in the accompanying drawings. FIG. 1 shows an overall view of the device according to the invention. A matrix 16 is fixed on a table 14 which is movable in the X and Y planes of the digitizing machine 13.
The shape of the mother die 16 is imitated by the tracer 18 attached to the tracer head 20 movable in the Z direction. Reference numeral 22 is a copying control device, and reference numeral 32 is a manual handle. Then, the position signals S _x , S _y , S _z of the X, Y, Z feed axes of the digitizing machine 13 are detected from the rotation amounts of the feed motors and output, and the displacement of the tracer 18 is traced.
20 and the displacement signals E _x , E _y ,
Output as E _z . A digitizing controller 26 is provided which takes in these two signals at predetermined time intervals and arithmetically outputs the digitizing data signals X, Y, Z representing the master mold shape. The digitizing machine 13 and the digitizing control device 26 constitute a digitizing device.

On the other hand, a workpiece W is fixed on a work table 11 movable in the X and Y planes of the NC machining device 10, and a tool 23 having a spindle head 21 movable in the Z direction is attached. The work W is processed by. The NC controller 12 controls the relative movement of the work table 11 and the spindle head 21 during this machining. This NC control device 12 performs automatic operation according to the NC program, and also has an input interface section 12a that receives a drive signal from an operator's manual handle 24, and can also perform manual operation. Further, the manual / automatic simultaneous mode allows operation by superimposing the NC program signal and the manual steering wheel signal.
Furthermore, the digitizing device converts the digitizing data signal generated by following the master block into a moving pulse signal corresponding to a manual handle pulse signal, and inputs the input interface section.
By guiding to 12a, the work of the same shape as the mother die 16 is NC
It can be processed by the processing device 10.

Therefore, a signal converter 28 for converting the output of the digitizing controller 26 into a moving pulse signal is required. The output of the signal converter 28 is as shown in FIG. This is the same as the manual pulse signal emitted from the manual handle 24 of the NC processing device 10. That is, it is composed of two rectangular wave pulses of A phase and B phase. When the B phase pulse advances by 1/4 cycle, it goes in the plus direction, and when the A phase pulse advances by 1/4 cycle. Means that the feed axis advances in the negative direction, and the feed amount is the amount of A-phase pulse. Receiving this A-phase and B-phase rectangular wave pulse,
A counter and an arithmetic means for discriminating the feed direction and determining the feed amount and the feed speed are provided inside the NC control device 12 and are well known, so the description thereof is omitted here. In this way, the signal conversion device 28 uses the digitizing data signal to convert the A phase and the B phase.
A moving pulse signal consisting of phases is generated, and the NC controller 12
To the input interface 12a. By doing so, the digitizing data signal when the tracer 18 traces the surface of the mother die 16 by the manual handle 32 of the digitizing machine 13 or when the trace is made automatically without the manual handle 32 is used. It is transmitted as the movement of the NC processing device without any delay.

[0011] Figure 3 is when the output from the digitizing control device 26 is a movement command that X = 2, Y = -3, Z = 0, the moving pulse signal X _A in the signal converter 28, X _B, Y
_A, is converted to Y _B shows a moving pulse waveform outputted. ( _A ) shows X _A and X _B , and (b) shows Y _A and Y _B.
, And Z _A and Z _B are 0, so the illustration is omitted. X = 2
The movement command X _{A and} the movement pulse X _B advanced by ¼ cycle are generated and output from the movement command. In addition, a movement pulse Y _{A and} a movement pulse Y _B delayed by a quarter cycle are generated and output from the movement command Y = −3. NC controller 12 which received these
Is + or-direction discrimination and counts the number of pulses
The C processing machine 10 issues a movement command by a manual handle pulse of 2 for the X axis and -3 for the Y axis.

The switch 30 includes a digitizing machine 13 and an NC.
This is so that the processing device 10 can be separated and the signal from the handle 24 described above can be input to the input interface 12a. Further, in the above embodiment, the mother mold 16
Although the shape data of 1 is transmitted as it is, it is also possible to correct it to the similar shape data by using the scaling function.

A method of performing rough cutting of the mold by the above-described apparatus will be described. FIG. 4 shows the trajectory of the approach movement of the tracer 18 with respect to the master block 16, and this approach movement is performed by the operator using the manual handle 32. This movement locus is composed of a locus 50 that slowly approaches in the depth direction at a certain plane position of the matrix 16, a locus 52 that quickly returns to the upper position after the approach is completed, and an in-plane locus 54 that moves to the next plane position. .

On the other hand, the NC program control function of the NC processing apparatus 10 makes it easy to always draw a circle having a predetermined diameter. In the present invention, the NC automatic processing device has a function of the manual automatic simultaneous mode, and thus the NC
The workpiece W is roughly machined as shown in FIG. 5 by superimposing the circle trajectory by the program and the manual movement trajectory by the manual handle 32 of the digitizing machine. A locus 56 shown by a solid line is a locus during cutting of the work W, and a locus 58 shown by a broken line is a locus moving to another place.

Here, in the above-mentioned example, the manual automatic simultaneous mode means that the locus of a circle, that is, the NC data is handled in the local coordinate system and the manual locus is captured in the absolute coordinate system. A function that captures the former local coordinate system and superimposes it on the latter absolute coordinate system by specifying the manual and automatic simultaneous mode. Although a circle is drawn in this embodiment, a rectangular shape
Other shapes may be used. Alternatively, the approach operation may be automatically performed, the position data thereof may be converted into a movement pulse signal, and the movement pulse signal may be input as manual data to the NC control device.

[0016]

According to the present invention, while the movement of the tool 23, which takes a lot of time to create the NC program, is controlled by the approach operation using the digitizing device, only the basic cutting operation can be controlled by the simple NC program. It is performed by the movement of a simple locus such as a circle. In this case, since the operation signal of the digitizing device is input to the interface for inputting the manual handle pulse signal of the NC processing device, it is possible to operate the machine by superimposing it on the circular motion of the NC or the like. Therefore, rough cutting can be performed with a tool having a high cutting efficiency such as a face mill or an end mill, and the programming time can be significantly shortened, so that the work efficiency of rough cutting of a mold or the like is improved as a whole.

[Brief description of drawings]

FIG. 1 is a view showing an apparatus for carrying out a processing method according to the present invention.

FIG. 2 is a diagram illustrating a manual handle pulse signal and a feed direction determination pulse.

FIG. 3 is a diagram showing an example of a moving pulse signal generated from a signal conversion device.

FIG. 4 is a diagram showing a trajectory of a manual approach to a master block in a digitizing machine.

FIG. 5 is a diagram showing a trajectory of an NC processing apparatus tool in which an NC program operation and a manual trajectory operation are superimposed.

[Explanation of symbols]

 10 ... NC processing device 12 ... NC control device 12a ... Input interface 13 ... Digitizing machine 24 ... Manual handle 26 ... Digitizing control device 28 ... Signal conversion device 32 ... Manual handle 56 ... Superposed work cutting path 58 ... Superposed Moving trajectory

Claims (1)

[Claims] 1. A master mold is traced by a digitizer by a tracer, and a position signal of movement of a feed shaft and a displacement signal of the tracer due to the copying operation are fetched at predetermined time intervals and the master mold is detected from the two detection signals. A digitizing data signal representing the shape is arithmetically output, the digitizing data signal is converted into a moving pulse signal corresponding to a manual handle pulse signal, and the converted moving pulse signal is accepted by the manual handle pulse signal of the NC processing device. Rough cutting of the workpiece is performed by the NC processing device by inputting to the interface and using the manual automatic simultaneous mode of the NC processing device to superimpose the command operation by the NC program and the command operation from the digitizing device. A rough cutting method by an NC processing device connected to a digitizing device.