JPH057134B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a control position for a contour machining machine, and in particular to a numerically controlled contour machining machine that controls the operation of the contour machining machine using digital numerical information. Regarding a control device.

[Conventional technology]

FIG. 2 is a block diagram showing the configuration of a numerical control device for a conventional contour processing machine.

External processing machine control section 2 of the numerical control device shown in Fig. 2
receives processed data from data input section 1,
The operation of the contour processing machine is controlled based on the received processing data. The numerical control device having such a configuration operates the contour processing machine in one-to-one correspondence with input machining data.

[Problem that the invention seeks to solve]

Processing performed using the conventional numerical control device configured as described above has the following problems. That is, when machining circular holes in a workpiece (for example, a printed wiring board) that has many circular holes, the machining data for the circular holes is input to the data input unit 1 so that the machining tool of the contour machining machine copies the circular shape. is input, and the contour machining machine control section 2 controls the contour machining machine based on such circular hole data to machine a circular hole. The cut piece of the circular hole machined at this time is naturally circular, and if its size exceeds a certain size, it will be sucked into the dust suction machine of the contour processing machine and cause clogging of the dust suction machine. For this reason, the machining operation has to be temporarily interrupted, resulting in a decrease in work efficiency.

In order to solve the above-mentioned problem, in addition to the circular hole data, the machining data includes machining data for carving the inside of the circular hole into small pieces in advance, so that the movement trajectory of the machining tool is as shown in Figure 3. Movement trajectory based on circular hole data as shown in (Circular movement trajectory)
It is also possible to adopt a method that creates a composite trajectory of 4 and the movement trajectory based on small-scale machining data (small-piece movement trajectory) 5, but in this case, the amount of data will be enormous, and the man-hours for creating the data will be reduced. It has the disadvantage of being large.

An object of the present invention is to eliminate the drawbacks of the conventional control device of the external shape processing machine as described above, and to eliminate the need to include processing data for cutting circular holes into small pieces in the processing data in advance. When the diameter of the circular hole data is larger than the standard value, when the circular hole data is input, small piece cutting data for carving the circular hole into small pieces is automatically generated and the contour processing machine is controlled. It is an object of the present invention to provide a control device for a contour processing machine that can prevent clogging of a dust suction device and prevent a decrease in work efficiency.

[Means for solving problems]

The control device for an external shape machining machine of the present invention includes a data input section for inputting machining data, and a data input section for inputting the machining data from the data input section. a small piece cutting data generation unit that automatically generates small piece cutting data for cutting the inside of the circular hole into pieces smaller than a circle having a diameter equal to the reference value; and the small piece cutting data generation unit. and a contour machining machine control section that inputs the small piece processing data and the circular hole data from the machine and controls the operation of the contour machining machine.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

In this embodiment, a small-piece machining data generating section 3 is provided between the data input section 1 and the contour processing machine control section 2 of the conventional example shown in FIG. It is configured so that data to be delivered as is and data automatically generated by the small piece processing data generating section 3 are input.

The information included in the input data to the control device in this embodiment is the same as in the conventional case, and includes data for machining various shapes in addition to the data for the circular hole. This is machining data for two workpieces. Data for a circular hole is given by its center coordinates and diameter or radius, and data for machining other shapes is given by starting point coordinates, bending point coordinates, and end point coordinates to follow that shape. .

The small piece cutting data generating section 3 operates as shown in the flowchart of FIG. 4 to automatically generate small piece cutting data. In other words, when the external shape machining starts, the small piece machining data generating section 3
receives processed data from data input section 1,
When data other than circular hole data, that is, shape data given by starting point coordinates, bending point coordinates, and end point coordinates, is read from the machining data, the data is passed as is to the contour processing machine control section 2. When the circular hole data is read, it is determined whether the diameter of the circular hole data is larger than a reference value (for example, 5 mm) (see reference numeral 11 in Fig. 4),
If it is large, calculate the value by adding the standard value to the diameter and dividing it by the standard, round down the fraction to make an integer (n) (reference numeral 12), and divide the circle into n equal parts in the X and Y directions. , and generate (n-1) line segment data parallel to the X and Y axes whose starting point and end point are each within the circle by the radius of the processing tool (for example, 1.2 mm) from the circumference ( Reference number 1
3).

The small piece machining data given by the automatically generated starting point coordinates and end point coordinates in this way is sent to the contour processing machine control section 2, and then the circular hole data is sent as is. The contour processing machine control section 2 controls the operation of the contour processing machine using these data.

FIG. 5 is a plan view showing an example of the movement trajectory of the machining tool based on the small piece cutting data automatically generated in the small piece cutting data generating section 3 as described above; In this case, (b) shows the case where n=3.

As shown in FIG.
A or 5B and the circular movement locus 4A or 4B are processed, so all cut pieces are smaller than a circle whose diameter is the reference value.
Therefore, clogging of the dust suction device due to cut pieces is prevented.

〔Effect of the invention〕

As described above, the control device for an external shape processing machine of the present invention allows the small piece cutting data generating section 3 to cut small pieces without including the processing data for carving the inside of the circular hole into small pieces in the input data. Since the one-sided machining data is automatically generated and sent to the external shape machining control section,
This has the effect of suppressing an increase in the number of man-hours for creating input data, and also prevents the dust suction device of the contour processing machine from being clogged with cut pieces.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention;
Fig. 2 is a block diagram showing an example of a conventional control device for an external shape processing machine, Fig. 3 is a plan view showing a two-dimensional trajectory of a processing tool based on circular hole data and small piece cutting data, and Fig. 4 is a block diagram showing an example of a conventional control device for an external shape processing machine. FIG. 1 is a flowchart showing the automatic generation operation of small piece cutting data in the small piece cutting data generating section of the embodiment, and FIG. 5 is a small piece cutting data automatically generated according to the flowchart in FIG. FIG. 3 is a plan view showing an example of a movement trajectory of a processing tool based on processing data. 1...Data input section, 2...Outline processing machine control section, 3...Small piece cutting data generation section, 4, 4
A, 4B... Movement trajectory of the processing tool based on circular hole data (circular movement trajectory), 5, 5A, 5B... Movement trajectory of the processing tool based on small-piece processing data (small-piece movement trajectory).

Claims (1)

[Claims] 1. A data input part for inputting machining data, and if the machining data is input from the data input part and the data is circular hole data, and the diameter is greater than a certain reference value, the inside of the circular hole is input to the reference value. a small piece cutting data generating section that automatically generates small piece cutting data for cutting into strips smaller than a circle having a diameter; 1. A control device for a contour machining machine, comprising: a contour machining machine control section that inputs circular hole data and controls the operation of the contour machining machine.