JP2718889B2 - Cutting positioning method of insulator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cutting and positioning an insulator having sand-coated portions at both ends.

[0002]

2. Description of the Related Art For example, in a manufacturing process of a solid insulator,
It is necessary to apply a crushed ceramic material called sand to both ends of the insulator and then cut the insulator from the middle of the sand application portion so that the entire length of the insulator is constant. In this case, it is often required to cut the upper and lower sand application portions so that the width is the same. For this reason, conventionally, an operator actually measures the width of the sand-applied portion of each of the insulators and operates the insulator position so that the width of the upper and lower sand-applied portions is the same, and performs cutting with a cutting grindstone. Was. However, such a method is labor-intensive and has a problem that dimensional accuracy tends to vary from operator to operator.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and provides an insulator cutting positioning method capable of cutting an insulator with reference to a sand-coated portion without requiring any manual operation. It was made to provide.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides an insulator having sand coating portions at both ends and a cutting grindstone which are supported so that their relative positions can be adjusted in the axial direction. By receiving the reflected light of the light beam irradiated to both ends by the light receiving means, the position where the regular reflected light is interrupted is detected as the boundary line of the sand application part, and the coordinates are sent to the arithmetic unit.
It is characterized in that the position of the insulator with respect to the cutting wheel is automatically set on the basis of the captured and detected boundary line. In addition, it is preferable that light is emitted from an elongated light source parallel to the axial direction of the insulator so that light receiving means receives reflected light from the insulator surface.

[0005]

According to the present invention, by utilizing the fact that light rays are irregularly reflected at the sand application portion and light rays are regularly reflected at the insulator surface, the light receiving means can be used to detect the position where regular reflected light is interrupted. > detected as a boundary line of the command applying unit, the arithmetic unit and the coordinates
Then, the position of the insulator with respect to the cutting wheel is automatically set based on the boundary line thus detected. Therefore, it is possible to cut the insulator from an accurate position without requiring any manual operation. In particular, by adopting a system in which light is emitted from an elongated light source parallel to the axial direction of the insulator and the reflected light is received by a CCD camera, the boundary of the sand application portion can be detected more reliably.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to the illustrated embodiments. In FIG. 1, reference numeral 1 denotes a solid insulator which is supported horizontally, and sand coating portions 2 and 3 are formed at both ends thereof. The insulator 1 is rotatably supported by rollers (not shown), and both end surfaces thereof are supported by opposed cylinders 4 and 5. In the embodiment, the cylinder 4 on one side is a digital cylinder whose position can be accurately set, and the cylinder 5 on the opposite side is an air cylinder functioning as an air spring.

Reference numerals 6 and 6 denote cutting whetstones for cutting the insulator 1 at the positions of the sand application sections 2 and 3. This cutting whetstone 6,
The distance between 6 is accurately set according to the total length of the product (the insulator after cutting), but the cutting grindstones 6 and 6 are so set that the width of both sand application sections 2 and 3 after cutting is the same. It is necessary to determine the position of the insulator 1 with respect to. Therefore, in the present invention, two CCD cameras 7 and 8 as light receiving means are installed facing sand coating portions 2 and 3 at both ends of insulator 1.

As shown in the figure, each of the CCD cameras 7 and 8 captures an image of the sand-coated portions 2 and 3 of the insulator 1. Lines cannot be clearly detected, and especially when the color of the insulator 1 is close to the color of sand, it is not easy to identify a boundary line. However, as shown in FIG. 2, when the insulator 1 is irradiated with light rays from the light sources 9 and 10 extending in the axial direction of the insulator 1 and the reflected light is received by the CCD cameras 7 and 8, the sand coating sections 2 and 3 are applied. The light rays are irregularly reflected in the portion of FIG. 1, while the light rays are regularly reflected on the smooth surface of the insulator 1. Therefore, as shown in FIG. Can be accurately detected as a broken position. The detection of such a boundary between the sand application sections 2 and 3 is performed for several points around the periphery while rotating the insulator 1.
It is preferable to take the average value.

As described above, the boundaries between the sand application sections 2 and 3 are detected, and the coordinates thereof are taken into the arithmetic unit. The arithmetic unit then operates the cylinders 4 and 5 so that the cylinders 4 and 5 are cut at equal distances from the boundary lines. To automatically set the position of the insulator 1 with respect to the cutting grindstones 6, 6 in the axial direction. At this time, in the embodiment, the cylinder 5 may be followed by operating only the cylinder 4 which is a digital cylinder, but it is also possible to set the position of the insulator 1 by using both of them as digital cylinders. In FIG. 2, one CCD camera 7 has a fixed position, and the other CCD camera 8 can be moved by rotating a feed screw 12 by a motor 11. The distance between the CCD cameras 7 and 8 can be set according to the total length of the product.

[0010]

As described above, according to the insulator cutting and positioning method of the present invention, light is disturbed in the sand-coated portion.
It is useful to reflect light rays regularly on the insulator surface.
Position where the regular reflected light is
The insulator can be detected as a boundary line, and the insulator can be cut with reference to the position of the boundary line of the sand application portion without any manual work. This eliminates the need for manual labor as in the past,
In addition, it is possible to eliminate variation in the cutting position due to the operator.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a front view showing an arrangement of a light source and a CCD camera in the embodiment of the present invention.

[Explanation of symbols]

1 insulator, 2 sand application section, 3 sand application section, 4
Cylinder, 5 cylinder, 6 cutting wheel, 7 CCD camera, 8 CCD camera, 9 light source, 10 light source, 11 motor, 12 feed screw

Claims (2)

(57) [Claims] 1. A regular by receiving both end portions relative positions adjustably supporting the insulator and the cutting wheels with a sand coating portion axially, the reflected light beam irradiated to the opposite ends of the insulator in the light receiving means The position where the reflected light is interrupted is detected as the boundary line of the sand application part, and its coordinates are taken into the arithmetic unit.
A cutting positioning method for an insulator, wherein the position of the insulator with respect to the cutting wheel is automatically set based on the detected boundary line. 2. The method according to claim 1, wherein light is emitted from an elongated light source parallel to the axial direction of the insulator, and reflected light from the insulator surface is received by a light receiving means.