JPH06297292A - Automatic chip removing apparatus - Google Patents

Abstract

PURPOSE:To automatically remove chips accumulated during working of a workpiece. CONSTITUTION:Chips 8 are accumulated as a workpiece 7 is worked. A working shape simulation calculating unit 10 obtains the workpiece shape being worked from a NC program by the simulation calculation to output the working shape data 14. A shape measuring unit 15 actually measures the shape of the workpiece 7 having accumulated chips 8 under the non-contact condition to output the measured shape data 21. A comparator 22 outputs position data 23 showing a spot where the working shape data 14 does not coincide with the measured shape data 21 in the comparison, i.e., the chips are accumulated. A chip removing apparatus 24 removes chips at the spot shown by a position data 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic chip removing apparatus applied to a machine tool.

[0002]

2. Description of the Related Art A processing example of a lathe will be described with reference to FIG. As shown in FIG.
Is fixed by a chuck 9 and is supported by a tailstock 18 to rotate the work 7. Also, the NC program stored in the NC program memory 2 of the NC device 1
The C program interpreter 3 converts the position information of the byte 25 and outputs a control signal 5 from the feed controller 4 to control the feed of the byte 25 for NC machining.

When the cutting powder 8 is caught on the work 7 during processing of the work 7, a person visually confirms and removes the cutting dust 8.

Another example is a portal machine tool 27 as shown in FIG. In the case of the gate type machine tool 27, the work 7 is automatically machined by fixing the work 7 on the pallet 26 and controlling each of the X, Y and Z axes by the NC program.

In the gate type machine tool 27, the cutting chips 8 generated during processing remain on the work 7 and the pallet 26. The chips 8 are removed manually. Further, the pallet 26 having the work 7 fixed thereon is placed on the chip removing machine 28 shown in FIG.

[0006]

If the cutting chips 8 remain on the work 7 and the pallet 26, they will interfere with the processing in the next step. Therefore, it is necessary to remove the cutting powder 8 during or after the processing. However, if this is relied on manually, it is difficult to incorporate it into automatic processing or unmanned processing lines. Further, the chip removing machine 28 as shown in FIG. 4 is expensive, and depending on the size, weight, etc. of the work 7, it cannot be applied to the automatic removing device, and in some cases, manual processing may be required. Furthermore, on the lathe,
Since the cutting chips become entangled in the work 7 and interfere with the processing,
It needs to be removed during processing. However, it is extremely dangerous when done by humans.

The present invention has been made in view of the above prior art, and an object of the present invention is to provide an automatic chip removing device capable of automatically removing chips.

[0008]

[Means for Solving the Problems] In order to remove chips, it is necessary to recognize where the chips are.
Therefore, in order to recognize the position of the swarf, an apparatus that simulates the machining shape in the middle of machining from the NC program, an apparatus that measures the actual workpiece and the shape on the pallet, and the shape data of both are compared online. Add a device. The difference between the shape obtained by simulation and the measured shape is recognized as swarf. On the basis of the position information of the cutting chips obtained as a result, the cutting chips attached to the work are removed by a cutting powder removing device configured by a robot or the like.

[0009]

The shape of the machined workpiece can be obtained by the device for simulating the machining shape during machining from the NC program by calculation. Further, the shape of the work containing the cutting chips can be obtained by measuring the actual shape online. Then, by comparing the shape data of the both, and extracting a location where the shapes do not match,
The position of the chips can be recognized online. Furthermore, by controlling the chip removing device based on the position of the chips obtained above, the chips can be removed automatically while processing.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. The parts having the same functions as those of the conventional technique are designated by the same reference numerals, and a duplicate description will be omitted.

FIG. 1 shows an embodiment of the present invention. The structure of the lathe processing unit 6 shown in the figure is the same as the conventional one. Further, the NC program storage device 2 of the NC control device 1 is realized by a semiconductor memory, a magnetic disk, or the like, and the NC program interpreter 3 and the feed control device 4 are software for calculation functions.
It is realized as software of a normal microcomputer.

Machining shape simulation calculation device 10
Is a machining shape calculator 12 that calculates the machining shape of the workpiece 7 during machining from the tool data 11 and the NC program, for example.
Then, it is possible to obtain the processed shape data 14 including the shape data storage unit 13 for storing the shape data and showing the shape of the workpiece 7 in the process of processing.

Here, an example of a storage method by the shape memory 13 is shown in FIG. The shape memory 13 multi-divides the object in the X and Y directions and stores the value of the coordinate (x, y) point in the Z axis direction.

Further, the shape measuring device 15 includes a measuring head 16
And a measured shape calculator 19 and a shape data storage 20. The measuring head 16 is, for example, a CCD camera 17, which obtains an actual shape of the work 7 and its surroundings by photographing an object to be measured and processing the data, and outputs measured shape data 21 indicating the shape. . The measurement shape data 21 indicates the peripheral shape of the work 7 including the cutting chips 8.

As another example of the shape measuring apparatus 15, as shown in FIG. 5, a method by a light section method is used. This device 1
Reference numeral 5 is composed of a measuring head 16, a laser slit light emitter 29 and a CCD camera 17, which irradiates the object to be measured with laser slit light and scans it in the X-axis direction. Then, this is photographed by the CCD camera 17 and the data is processed to obtain the shape.

The comparator 22 compares the machined shape data 14 and the measured shape data 21, extracts a location where the shape data does not match, recognizes this portion as the position of the cutting powder 8, and the position data 23 of the cutting powder 8. Is output.

The chip removing device 24 is, for example, as shown in FIG. 7, a hand 30 having a simple structure for grasping an object, and the position of this hand 30 is position data 23 indicating the position of the chip 8 from the comparator 22. The cutting chips 8 entwined with the work 7 are grasped and removed by the hand 30 by using the hand.

[0018]

As described above, the position of the swarf is automatically recognized by the shape measuring device, the machining shape simulation calculation device and the comparator for comparing the shape data of both, and the swarf is used using this data. By controlling the removing device, chips can be removed automatically without human intervention, and it is possible to incorporate an unmanned automatic line. Further, since the chip removing device itself is small and can be attached to the machine tool body, an expensive and large removing device is not required, and a large cost reduction can be achieved. Furthermore, it can be removed automatically even during processing, and it is not removed by humans, and safety is enhanced.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a chip removing device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a cutting dust generation situation in a lathe.

FIG. 3 is an explanatory diagram showing a cutting dust generation state in a gate type machine tool.

FIG. 4 is a configuration diagram showing a conventional chip removing device.

FIG. 5 is a configuration diagram showing a shape measuring apparatus by a light section method.

FIG. 6 is an explanatory diagram showing a storage method of a data storage device.

FIG. 7 is a configuration diagram showing a hand.

[Explanation of symbols]

 1 NC Control Device 2 NC Program Memory 3 NC Program Interpreter 4 Feed Controller 5 Control Signal 6 Lathe Machining Part 7 Work 8 Chips 9 Chuck 10 Machining Shape Simulation Calculator 11 Tool Data 12 Machining Calculator 13 Shape Data Memory 14 Machining shape data 15 Shape measuring device 16 Measuring head 17 CCD camera 18 Tailstock 19 Measuring shape calculator 20 Shape data memory 21 Measuring shape data 22 Comparator 23 Position data 24 Chip removing device 25 bytes 26 Pallet 27 Gate type machine tool Part 28 Chip removing machine 29 Laser slit light emitter 30 Hand

Claims (1)

[Claims] 1. A machining shape simulation calculation device for calculating the shape of a workpiece in the middle of machining from a NC program for machining a workpiece by simulation calculation and outputting machining shape data indicating the workpiece shape, a workpiece to be machined and its machining. A shape measuring device that actually measures the surroundings and outputs measured shape data indicating the shape of the work and its surroundings is compared with the processed shape data and the measured shape data. An automatic chip removing device, comprising: a comparator that outputs the position data shown; and a chip removing device that is controlled based on the position data to remove chips at the position indicated by the position data.