JPH0741515B2 - 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 relates to a device for simultaneously operating an NC processing machine while performing a copying operation by a digitizing device. In particular, it can be used when the machining work is performed under the supervision of the operator in the rough cutting of the mold.

[0002]

2. Description of the Related Art As a method of driving and controlling an NC processing device, a digitizing data signal (binary signal) generated by a digitizing device mechanically separated from the NC processing device is temporarily stored in a buffer memory means. What is sent from there to the NC processing device to execute the NC processing operation is disclosed in Japanese Patent Application Laid-Open No. 63-34054 by the present applicant. The presence of this buffer memory means causes a time delay on the order of seconds.

[0003]

For example, in the case of roughly cutting a die, it is generally necessary to increase the depth of cut and perform high-speed processing.
The operator manually performs the copying operation of the digitizing machine,
C The feed is often controlled at the speed at which the handle is turned while monitoring the processing status of the processing device. Further, even when the copying operation is automatically performed, the operator constantly monitors the processing status of the NC processing apparatus, and if it judges that the processing state is unreasonable, the copying operation is immediately delayed, etc. Perform the operation.

Since the above operator's judgment is made by monitoring the fluctuation of the working state of the NC working device, the operation of the digitizing machine to be controlled and the NC
If there is a time delay with the operation of the processing device, the judgment is likely to be erroneous.

Therefore, the present invention is substantially provided between the copying operation of the digitizing machine and the machining operation of the NC machining apparatus so as not to disturb the judgment of the operator who is monitoring the machining situation of the NC machining apparatus. It is an object of the present invention to provide an NC processing device connected to a digitizing device that does not cause a large time delay.

[0006]

In view of the above-mentioned object, the present invention is to perform a copying operation of a mother die in a digitizing device,
Before receiving the digitizing data signal obtained by the copying operation
Digi-Tie for NC machining a workpiece with a shape corresponding to the mother die
In an NC processing device connected to a digging device, an NC processing device having an interface for inputting a manual handle pulse signal generated by operating a manual handle,
A master is traced by a tracer, and a position signal of movement of a feed shaft due to the tracing operation and a displacement signal of the tracer are fetched at predetermined time intervals, and a digitizing data signal representing a master shape is obtained from the two fetched signals. A digitizing control device for performing arithmetic output, and a digitizing data signal generated from the digitizing control device are converted into a moving pulse signal corresponding to the manual handle pulse signal, and the moving pulse signal is used by a manual hand of the NC processing device.
There is provided an NC processing device connected to a digitizing device, the signal processing device being connected to an interface for receiving a pulse signal .

[0007]

The NC processing apparatus of the present invention has a mode in which it is operated by a manual handle, and there is no substantial time delay between the processing operation and the handle operation of the NC processing apparatus in this mode. Therefore, convert the digitizing data signal generated from the digitizing device to a moving pulse signal that corresponds to the pulse signal by the manual handle,
Have it input to the interface that inputs the manual handle pulse signal. Then, a substantial time delay does not occur between the copying operation of the digitizing machine and the processing operation of the NC processing device.

[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 Sx, Sy, Sz of the X, Y, Z feed axes of the digitizing machine 13 are detected from the rotation amount of each feed motor and output, and the displacement of the tracer 18 is detected by the tracer head 20. , And output as displacement signals Ex, Ey, Ez from the copying control device 22. Then, the digitizing control device 26 which takes in these two signals at predetermined time intervals and arithmetically outputs the digitizing data signals X, Y, Z representing the master shape.
To provide. 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 which is movable in the X and Y planes of the NC machining device 10, and a tool 23 attached to a spindle head 21 which is movable in the Z direction. 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. The NC control device 12 has an input interface section 12b for inputting master block shape data sent from a master block copying device such as a digitizing machine and controlling the NC processing device 10 by automatic operation. In addition, it also has an input interface unit 12a for manually controlling the NC processing apparatus 10 by inputting the rotation amount of the handle 24 which can be rotationally driven by an operator and the rotation direction thereof. In the case of manual control, each feed shaft of the NC processing device 10 has a function of following the output of the handle 24 substantially without delay. As described above, when the master shape data is transmitted to the input interface unit 12b, it is necessary to temporarily store it in the buffer memory means in order to cause the NC controller to pre-read. In this method, the movement of the tracer 18 is moved. There is a problem that a substantial time lag occurs between the movement of the tool 23 and the movement of the tool 23.

In this embodiment, a case where the workpiece W to be processed is roughly cut will be considered. As described above, the processing conditions for rough cutting vary greatly and are generally severe. Therefore, it is generally performed that an operator monitors the machining state of the NC machining apparatus 10 while rotating the manual handle 32 of the digitizing machine 13 and following the mother die 16. In this case,
If there is a substantial time lag between the copying operation and the machining operation of the NC machining apparatus 10, the operator is likely to make a mistake in the handle operation, making smooth operation impossible. Therefore, in the present invention,
The above-mentioned input interface section capable of directly driving the NC processing apparatus without using the buffer memory means.
A method of inputting a moving pulse signal corresponding to the manual handle pulse signal to 12a is adopted.

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 the A phase pulse advances by 1/4 cycle. If it is, it means that the feed axis advances in the minus 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.

In FIG. 3, when the output from the digitizing control device 26 is a movement command of X = 2, Y = -3, Z = 0, the signal conversion device 28 moves pulse signals X _A, X _B, Y. _A, Y
_The moving pulse waveform converted into _B and output is shown.
( _A ) shows X _A, X _B , (b) shows Y _A, Y _B , Z
_{Since A and} Z _B are 0, illustration is omitted. From the movement command of X = 2, the movement pulse of X _A and X _B advanced by ¼ cycle
Is generated and output. Also Y =-
From the movement command of 3, the movement pulse of Y _A and 1/4
A moving pulse called Y _{B which} is delayed by a cycle is generated and output. Upon receipt of these, the NC control device 12 discriminates the + or − direction, counts the number of pulses, and determines the X
A movement command is issued by a manual handle pulse of 2 for the 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.

[0014]

As is apparent from the above description, according to the present invention, the output signal from the digitizing device is converted into a manual pulse signal and sent to the NC processing device. As a result, there is no substantial time lag in the operation between the two machines, and therefore, there is no cause for the operator to make an erroneous decision. Smooth manual operation of the digitizing machine or NC
Correct monitoring of processing equipment is possible. Therefore, the work can be processed more quickly and more accurately.

[Brief description of drawings]

FIG. 1 is an N connected to a digitizing device according to the present invention.
It is the whole C processing device lineblock diagram.

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.

[Explanation of symbols]

 10 ... NC processing device 12 ... NC control device 12a, 12b ... Input interface 13 ... Digitizing machine 24 ... Manual handle 26 ... Digitizing control device 28 ... Signal conversion device 32 ... Manual handle

Claims (1)

[Claims] 1. A copying operation of a mother die with a digitizing device.
While performing, digitizing data signal obtained by the copying operation
In response to this, NC machining is performed on the work having a shape corresponding to the mother die.
The NC processing device connected to the digitizing device
And having an interface for inputting a manual handle pulse signal generated by operating the manual handle.
The machining device and the mother die are traced by a tracer, and the position signal of the movement of the feed shaft due to the tracing operation and the displacement signal of the tracer are fetched at predetermined time intervals, and the mother signal is taken from the two fetched signals. A digitizing control device for calculating and outputting a digitizing data signal representing a mold shape, and a digitizing data signal generated from the digitizing control device converted into a moving pulse signal corresponding to the manual handle pulse signal, and the moving pulse. A signal processing device connected to input a signal to an interface for receiving a manual handle pulse signal of the NC processing device, the NC processing device coupled with a digitizing device.