JPH04110604A - Detecting apparatus for bend of groove - Google Patents

Abstract

PURPOSE:To detect the bending state of a groove formed in a work accurately and quickly by providing an operating device for judging the shape of the groove based on the detected signals from a pair of groove detectors and the position signals from a driving devices. CONSTITUTION:A work W to be measured is selected with a digital switch 21. The inputted signals are inputted into a computer 24 through an apparatus input signal circuit 22 and an interface 23. The data such as a width A, a groove length B, a groove depth C and the like of the work corresponding to the work W which are stored in the computer 24 are selected and read out. The moving amount of a pulse motor 6 is operated based on the data and outputted into the pulse motor 6 through an apparatus output signal circuit 25. When the pulse motor 6 is driven, a groove detector 29 is moved in the direction of the (x) axis, and the position is determined. Then, a detection starting signal is inputted into the apparatus input signal circuit 22 by the switch 21. A servomotor 10 is driven by the similar way through the interface 23, the computer 24 and the apparatus output signal circuit 25. Groove detectors 28 and 29 are moved in the direction of the (y) axis.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a groove bending detection device for detecting the bending state of a groove formed in a workpiece.

(Prior Art) Grooves are generally cut into a work using a milling cutter or the like. As processing demands increase and the groove width becomes narrower, the milling width of the tool also decreases, and the rigidity of the milling cutter inevitably decreases. At the same time, if the cutting edge wears out as the number of cutting operations increases, cutting resistance increases and the milling cutter may bend.

When the milling cutter is bent in this manner, the groove may not be cut straight, but may be cut obliquely in two-dimensional and three-dimensional directions. Conventionally, when a groove is formed at an angle with respect to a workpiece, there is no means for appropriately detecting this, and the bending of the groove has been detected by visual inspection, calipers, a shaft, or the like.

(Problems to be Solved by the Invention) As described above, conventionally there is no means for appropriately detecting the curved state of the groove, and the detection has been done by visual inspection or the like.

Furthermore, in a loft production system in which cutting is performed in an unmanned manner, there is no means for detecting the curved state of the grooves, which sometimes results in defective quality in all lots.

The present invention has been made in consideration of these points,
It is an object of the present invention to provide a groove bending detection device that can accurately and quickly detect the bending state of a groove formed in a workpiece.

[Structure of the invention]

(Means for Solving the Problems) The present invention includes a pair of groove detectors arranged above a groove formed in a workpiece in substantially the same direction as the groove, and holding the pair of groove detectors. a movable base that is movable in a direction perpendicular to the groove; a drive device that drives the movable base; and a groove shape determined from detection signals from the pair of groove detectors and position signals from the drive device. A groove bending detection device is characterized in that it is equipped with an arithmetic device that performs the following steps.

(Function) The detection signal from the pair of groove detectors and the position signal from the drive device are input to the calculation device, and these detection signals and position signals are used to determine the deviation in the formation direction and the depth direction of the groove formed on the workpiece. Determine the groove shape regarding the inclination of the groove.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

1 to 7 are diagrams showing an embodiment of a groove bending detection device according to the present invention.

In FIG. 1, a workpiece W is placed between the fixed table 1 and the movable table 2.
is clamped, and a groove Wa is formed in the workpiece W by cutting with a milling cutter or the like.

The shape of this workpiece W is as follows: workpiece width A1 groove length B1
and groove depth C.

Further, above the workpiece W, a pair of groove detectors 28 and 29 are arranged side by side in the direction in which the groove Wa is formed (X direction).

Further, the pair of groove detectors 28 and 29 each have reflective displacement sensors 28a and 29a that use laser light or the like.

One of the groove detectors 28 and 29 of the pair of groove detectors 28 and 29
is fixed to the movable base 4. The other groove detector 29 is movable along a rail 5 fixed to the movable base 4. The rail 5 is in the same direction as the groove Wa (X
The groove detector 29 is moved via the pinion 7 and the rack 8 by driving a pulse motor 6 fixed to the moving base 4.

Further, a rail 15 is fixed to the moving base 4 in a direction (y direction) perpendicular to the direction of Wa, and this rail 15 is configured to move on a linear motion bearing 14 of the table 13.

That is, a servo motor 10 is fixed to the movable base 41, and the pinion 11 is driven by the servo motor 10.
A rail 15 is moved on a linear motion bearing 14 via a rack 12. This allows the pair of groove detection devices 28 and 29 to move together in the y direction.

Further, a pulse generator 16 for detecting the rotational position of the servo motor 10 is attached to the servo motor 10. Additionally, a pulse generator 16 and a pair of groove detectors 28
．． 29 is connected to the device input signal circuit 22. A digital switch 21 is connected to this device input signal circuit 22, and the device input signal circuit 22 is further connected to an interface 23. Also interface 2
3 are connected to the device output signal circuit 25 and the computer 24, respectively. Note that the device input signal circuit 22,
The interface 23, the computer 24, and the device output signal circuit 25 constitute the arithmetic device 20.

Furthermore, the device output signal circuit 25 is connected to the servo motor 10 and the pulse motor 6, and is also connected to the display 26.

Next, the operation of this embodiment having such a configuration will be explained.

First, the digital switch 21 selects the work W to be measured. A signal input by the digital switch 21 is input to the computer 24 via the device input signal circuit 22 and the interface 23.

Next, in the computer 24, data such as the width A, groove length B, groove depth C, etc. of the workpiece corresponding to the workpiece W, which is stored in advance in the computer 24, is selectively read out based on the input signal.

Further, in the computer 24, the amount of movement of the pulse motor 6 is calculated based on the read data, and this amount of movement is output to the pulse motor 6 via the device output signal circuit 25. Then, as the pulse motor 6 is driven, the groove detector 29 is moved in the X-axis direction, and positioning is performed. That is, the pair of groove detectors 28 and 29 are positioned so as to pass through both ends of the groove Wa.

Next, a detection start signal is input to the device input signal circuit 22 by the digital switch 21, and based on this detection start signal, the servo motor 10 is similarly activated via the interface 23, computer 24, and device output signal circuit 25. The groove detectors 28 and 29 are moved in the y-axis direction.

In this case, the displacement sensor 28 of the pair of groove detectors 28, 29
a, 29a detects the groove Wa of the workpiece W, and this detection signal is sent from a pair of groove detectors 28 and 29 to the equipment input signal circuit 22.
is input. At the same time, a position signal indicating the rotational position of the servo motor 10 is input from the pulse generator 16 to the device input signal circuit 22. These detection signals and position signals are inputted to the computer 24 via the interface 23, and the shape of the groove Wa is determined in the computer 24. The determination result is displayed on the display 26 via the interface 23 and the device output signal circuit 25.

Next, groove shape determination by the computer 24 will be explained with reference to FIGS. 2 to 7.

First, the normal state of the groove will be explained with reference to FIG.

In FIG. 2, the signal 30 is the position signal output from the pulse generator, and the signals 31 and 32 are the groove detector 2, respectively.
8 and 29. Further, the convex portions 31a and 32a of the signals 31 and 32 are portions indicating the groove Wa, and have a height corresponding to the groove depth C.

In FIG. 2, the groove detectors 28 and 29 detect the groove Wa at the same position with respect to the signal 30 from the pulse generator 16, and the detection start position is the signal 30a in both cases. This shows that only a deviation occurs at both ends of the groove Wa of the workpiece W.

The shape of the groove Wa of the workpiece W corresponding to FIG. 2 is shown in the perspective view of FIG.

Next, the case where the groove is defective will be explained with reference to FIGS. 3 and 4. In FIG. 3, the groove detectors 28 and 29 are connected to the groove W.
The positions where a is detected are different positions with respect to the signal 30. Also, the detection start position is signal 3.
0b and 30c. In the case of FIG. 3, it is shown that the groove Wa of the workpiece W is shifted at both ends thereof, that is, the groove Wa is shifted in the forming direction (X direction). The shape of the groove Wa of the workpiece W corresponding to FIG. 3 is shown in the perspective view of FIG. 6.

Also, Fig. 4 shows the signal 31.3 from the groove detector 28.29.
2 indicates a state where it cannot be obtained in the groove Wa. This means that the groove Wa is in the depth direction (direction 2 in Figure 1).
It shows that it is tilted. The shape of the groove Wa of the workpiece W corresponding to FIG. 4 is shown in the perspective view of FIG. 7.

In the above embodiment, the groove depth C can also be measured at the same time by calculating the heights of the protrusions 31a and 32a from the signals 31 and 32 from the groove detectors 28 and 29 using the computer 24. Further, when determining the groove shape in the computer 24, the normal groove shape stored in the computer 24 in advance and the measured groove shape are compared and examined to determine whether or not the measured groove shape is within the allowable range. It is also possible to judge.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to determine the groove shape such as the deviation of the groove formed in the workpiece and the inclination in the depth direction using the arithmetic device.

Therefore, the groove shape can be determined quickly and accurately without contact and automatically.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing an embodiment of a groove bending detection device according to the present invention, and FIGS. 2 to 4 are diagrams showing a detection signal from a groove detector and a position signal from a pulse generator, and FIG. Fig. 5 is a perspective view showing the groove shape corresponding to Fig. 2, and Fig. 6 is a perspective view showing the groove shape corresponding to Fig. 3.
FIG. 7 is a perspective view showing the groove shape corresponding to FIG. 4. FIG. 4...Moving base, YuO...Servo motor, 16.
...Pulse generator, 20... Arithmetic device, 22... Equipment input signal circuit, 23... Interface, 24...
... Computer, 25 ... Equipment output signal circuit, 28
．． 29... Groove detector, W... Workpiece, Wa... Groove.

Claims (1)

[Claims] A pair of groove detectors arranged above the groove formed in the workpiece in substantially the same direction as the groove, and a movable base that holds the pair of groove detectors and is movable in a direction orthogonal to the groove. A groove bending device comprising: a drive device that drives the movable base; and an arithmetic device that determines a groove shape based on detection signals from the pair of groove detectors and position signals from the drive device. Detection device.