JPH02185345A - Broken cutter detection device of one-touch replacement - Google Patents

Abstract

PURPOSE:To make it possible to easily exchange a detection plate by removing its engagement with a bolt type rod by way of pushing the detection plate and enabling it to be pulled off upward after putting the slender head part and the long groove of the bolt type rod together by way of rotating the plate by 90 deg.. CONSTITUTION:A long groove 4a is formed on the opposite side of the stiffening plate 6 of a detection plate 4, and when the direction of the head part 1a of a bolt type rod 1 matches the longitudinal direction, the groove is set in the width enough to pass the head part 1a. And, an inclined face 4b to make contact with the inclined face 1b of the bolt type rod 1 and a step difference part 4c to allow engagement of the head part 1a thereto are formed in the direction at right angles to the longitudinal direction of the long groove 4a. At the time of exchanging the detection plate 4, after the detection plate 4 is pushed down against an elastic support means 7 and its engagement with the bolt type rod 1 is released, it is horizontally turned by 90 deg., the direction of the long groove 4a matches the longitudinal direction of the head part 1a and it is possible to remove the detection plate 4 upward.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a cutting tool breakage detection device that allows a detection plate for detecting cutting tool breakage to be replaced with one touch.

[Prior Art] As part of the conventional cutting tool breakage detection device is shown in FIG. When the cutting tool a comes into contact with the detection plate, it is possible to display that the cutting tool is not damaged through an energizing means (not shown).

In this case, the detection plate b has a port d on the holding plate C.
is fixed with a nut e, and its holding plate is connected to the fixed side support plate f.
is elastically supported via spring g.

[Problems to be Solved by the Invention] Since the detection plate b comes into contact with the lower surface of the cutting tool a, the surface of the detection plate b is worn out by long-term use, and it becomes necessary to replace it.

In order to prevent this detection plate from being worn out, cemented carbide glue or the like may be attached to the contact surface with the cutting tool, as shown by the two-dot chain line in FIG. 5, but this has the disadvantage of being expensive.

When replacing the detection plate b, it is necessary to remove the pole d and the nut e, but the replacement work is troublesome, and it is difficult to ensure that the new detection plate is correctly positioned with respect to the cutting tool a. However, if the abutment surface shifts, a situation may arise in which the cut of the cutting tool cannot be accurately detected.

The present invention was made in order to solve the various problems of the conventional art, and it is an object of the present invention to provide a cutting tool breakage detection device that allows the detection plate to be easily replaced and to correctly position the detection plate. This is a major issue.

[Means for Solving the Problem] As a means for solving this technical problem, the present invention provides a cutting tool in which a detection plate is positioned so as to be able to come into contact with the tip end side of the cutting tool, and detects the presence or absence of a breakage of the cutting tool. The cut detection device includes a bolt-like rod having an inclined surface formed on one side of the elongated head, and the elongated head of the bolt-like rod having one end thereof opened on the opposite side that contacts the cutting tool. It has a long groove through which it can be inserted, and has a sloped surface that comes into contact with the sloped surface of the head when the long groove and the head are perpendicular to each other, and a stepped part into which the head fits is provided around the long groove. The present invention is characterized in that it includes the above-mentioned detection plate, and elastic support means for rotatably elastically supporting the detection plate on the fixed side.

[Operation] When replacing the detection plate, push the detection plate down against the elastic support means to release the engagement with the bolt-shaped rod, and in that state, rotate it horizontally by 90 degrees. Then, the elongated head of the bolt-like rod and the long groove of the detection plate align in parallel, and the detection plate can be removed upward. Furthermore, a new detection plate can be easily installed by reversing the procedure for removal, and its installation position is determined by fitting with a bolt-like rod.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the accompanying drawings. In FIGS. 1 and 2, 1 is a bolt-shaped loft, which has an elongated head 1a, an inclined surface 1b formed on one side of the head, and a screw llc formed at the lower end. The angle θ of the inclined surface 1b is set to 75 degrees. This bolt-shaped rod 1 is attached to a holding plate 2.
The screw portion 1c is inserted through the screw portion 1c, and the mounting is fixed with a nut 3.

Reference numeral 4 designates a flat detection plate, on the upper surface of which engages with the cutting tool 5, a patch plate θ made of a hard material such as a superalloy is fitted, and on the opposite side, a long groove 4a is formed with one end open. It is formed by This long groove 4a has a width dimension that allows the head portion of the bolt-like rod 1 to be inserted therethrough when the longitudinal direction thereof coincides with the head portion 1a of the bolt-like rod 1. In addition, the detection plate 4
As shown in FIG. 3, an inclined surface 4b abutting against the inclined surface 1b of the bolt-like rod 1 is formed in a direction perpendicular to the longitudinal direction of the long groove 4a, and on the opposite side thereof, the head 1a is fitted. A stepped portion 4c is also formed in a direction perpendicular to the longitudinal direction of the long groove 4a.

Reference numeral 7 designates an elastic support means for supporting the detection plate 4, which is composed of a coil spring, is compressed between the holding plate 2 and the detection plate 4 so as to surround the bolt-like rod 1, and is provided with a washer. By urging the detection plate 4 upward through the bolt-shaped rod 1
is in pressure contact with the head 1a of the head 1a.

The cutting tool breakage detection device according to the present invention is constructed as described above, and as in the conventional case, if the detection plate 4 comes into contact with the cutting tool 5, the cutting tool is not broken, and as shown in FIG. When the tip does not come into contact with the detection plate 4, the breakage can be detected.

When the contact surface with the cutting tool 6 is worn out and the detection plate 4 needs to be replaced, the detection plate 4 is pushed down against the elastic support means 7 to release the fitting with the bolt-like rod 1. After that, when the detection plate 4 is rotated horizontally by 90 degrees, the longitudinal direction of the long groove 4a of the detection plate 4 and the head 1a of the bolt-shaped rod 1 coincide with each other, as shown by the two-dot chain line in FIG. It can be removed upwards. When the detection plate 4 is removed, the washer 8 is attached to the head 1a of the bolt-like rod 1.
to prevent the elastic support means 7 from popping out.

Next, in order to install a new detection plate, it is sufficient to follow the procedure reverse to the above-mentioned removal. That is, first, the long groove 4a of the detection plate 4 is aligned with the head 1a of the bolt-like rod 1, and the washer 8 is elastically tightened. When pushed down against the support means 7, the head 1a passes through the long groove 4a, and when the detection plate 4 is then rotated horizontally by 90 degrees, the head 1a passes through the long groove 4a as shown by the solid line in FIG. 1a is fitted with the detection plate 4. At this time, the inclined surface 1 of the bolt-like rod 1
b and the inclined surface 4b of the detection plate 4 are in contact with each other, and the detection plate 4 is urged upward by the elastic support means 7, so that the detection plate 4 is pressed against the head of the bolt-like rod 1, and thereby the detection plate 4 is pressed against the head of the bolt-shaped rod 1. The mounting condition will be extremely solid. At the same time, the detection plate 4 is automatically positioned relative to the cutting tool 5.

In this way, the detection plate 4 can be easily replaced, and can be replaced in the same way even when the detection plate is not provided with the abutment plate 6 as described above.

Incidentally, instead of attaching the caul plate, the detection plate may be hardened to improve its wear resistance. Further, in the above embodiment, the inclined surface of the bolt-like rod was set at 75 degrees, but the angle is not limited to this angle.

[Effects of the Invention] As explained above, according to the present invention, a bolt-like rod having an elongated head has a long groove through which the elongated head can be inserted, and a long groove formed in a direction perpendicular to the long groove. A detection plate having an inclined surface and a stepped portion is held in pressure contact via an elastic support means such as a coil spring, and the detection plate can be replaced simply by rotating the detection plate 90 degrees against this elastic support means. Because of this, it can be easily replaced with one touch, and the mounting condition of the detection plate is solid, and it has excellent effects such as correct positioning with respect to the cutting tool automatically.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing one embodiment of the present invention, and Fig. 2 is a plan view showing an embodiment of the present invention.
Figure 3 is an enlarged partial cross-sectional view taken along line ■-m in Figure 1, Figure 4 is a plan view showing how to replace the detection plate, Figure 5 is an explanatory diagram of the conventional example. It is. 1... Bolt-shaped rod 1a... Elongated head 1
b...Slanted surface IC...Threaded part 2...
Holding plate 3... Nut 4... Detection plate 4a... Long groove 4b... Inclined surface
4C...Stepped part 5...Cutter θ
...Packing plate 7...Elastic support means 8...Washer III Fig. 311 fJ14

Claims (1)

[Claims] Position the detection plate so that it can come into contact with the tip of the cutting tool,
The cutter breakage detection device for detecting the presence or absence of cutter breakage includes a bolt-like rod having an inclined surface formed on one side of the elongated head, and one end of which is opened on the opposite side that contacts the cutter. The bolt-shaped rod has a long groove into which the elongated head can be inserted, and has an inclined surface that comes into contact with the inclined surface of the head when the long groove and the head are perpendicular to each other, and the head fits into the long groove. One-touch replacement cutter breakage detection, characterized in that the detection plate is provided with a stepped part around the long groove, and elastic support means rotatably supports the detection plate on a fixed side. Device.