JPH08132304A - Boring bar with distance gauge - Google Patents

Abstract

PURPOSE: To measure the diameter of a cut hole without removing a boring bar from the cut hole by installing a contactless distance measuring probe on a main body of the boring bar. CONSTITUTION: As power is inputted to two laser measuring device main bodies installed on dents provided on a boaring bar main body 2 at 180deg. deflected positions from each other through a slip ring 7, a laser beam is generated. This laser beam is reflected on a reflection mirror to be cast on a hole surface of a subject to be measured, and it is reflected by the subjet to enter the laser measuring device main body 5 to be converted into a signal. This signal is taken from the slip ring 7 to be inputted to an operation device, a display, etc. The inner diameter of the hole can thus be known without removing a boring bar 1 from the hole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boring bar used in a boring machine.

[0002]

2. Description of the Related Art As one method of cutting the inside of a hole, there is a method of attaching a boring bar to a boring machine, rotating the boring bar, and cutting with a cutting tool attached to the boring bar. Conventionally, in order to measure the inner diameter in this cutting work, pull out the boring bar, measure the inner diameter with a measuring instrument such as an inside micrometer,
When the size was not the predetermined size, further cutting and measurement were repeated so that the final finished size was obtained.

[0003]

In the above conventional method,
If it is divergent and the opposite side is long, it is difficult to measure, and a special measuring instrument is required for the measurement. Also, since the boring bar must be pulled out after cutting to measure, it takes a long time to measure, and
The time required for measurement occupies a considerable part of the time required for cutting work, since it is not completed by only once. An object of the present invention is to provide a boring bar capable of measuring the diameter of a cutting hole without pulling out the boring bar from the cutting hole.

[0004]

In order to achieve the above object, in the present invention, a noncontact distance measuring element is attached to a boring bar. Also, a non-contact distance measuring element was attached near the position of the cutting tool. More specifically, a recess is formed in the vicinity of the boring bar where the bite is attached, and in this recess, a laser distance measuring device, a vortex, is preferably located at a position where the inner diameter of the extension of the cutting edge of the bite can be measured. Two non-contact distance measuring elements such as a current position measuring device are preferably attached at positions facing each other with the center line of the body of the drive shaft of the boring bar interposed therebetween. The term "distance measuring element" as used in the present invention means a part of the distance measuring device, which can be converted to obtain a signal for which the distance is known.

[0005]

In the present invention, since the boring bar is provided with the non-contact distance measuring element, the signal detected by the distance measuring element is taken out from the boring bar through the slip ring (7) and provided outside. And by inputting into the indicator, the inner diameter of the hole can be known without taking out the boring bar from the hole.

[0006]

An embodiment of the present invention will be described below with reference to FIGS. 1 is a front view of the boring bar of the present invention, FIG. 2 is a side view of a part of the boring bar of the present invention, and FIG. 3 is an enlarged view of the boring bar of the present invention where a non-contact distance measuring element is attached. FIG. The boring bar (1) of the present invention includes a boring bar body (2) and a drive shaft (3) capable of moving up and down in the boring bar body (2) as shown in FIGS. 1 and 2.
Bit (4) that moves forward and backward by the vertical movement of the drive shaft (3)
And a device for converting vertical movement of the drive shaft (3) into forward and backward movement of the bite (4) (explanation is omitted because it is not directly related to the present invention), and laser measurement is performed for each two distance measuring elements. It consists of a container body (5), a reflecting mirror (6), three slip rings (7) and the like.

The laser measuring device main body (5), which is a distance measuring element, generates a laser beam, converts the state of the reflected laser beam back to a signal, and passes it through the slip ring (7). Arithmetic unit not shown,
The bowling bar body (2) connected to the display etc.
In the vicinity of the bite (4), the bite (4) is installed 90 degrees to the left and right, that is, in a recess (8) provided at a position offset by 180 degrees. The reflecting mirror (6) reflects the laser beam emitted from the laser measuring device main body (5) to the distance measuring point (10) of the object to be measured (9) and is reflected at the distance measuring point (10) to return. The laser beam emitted from the laser measuring device main body (5) is a hole of the measured object (9) for the laser beam emitted from the laser measuring device main body (5). It is installed in the recess (8) so as to irradiate a point (10) on the circumferential line drawn on the surface. A slip ring (7) for supplying electric power and extracting a detection signal is attached to a tapered portion where a boring bar (1) is attached to a boring machine, and one slip for supplying electric power and two for extracting a detection signal. A total of 3 are attached.

The boring bar (1) of the present invention constructed as described above generates a laser beam when electric power is input to the two laser measuring instrument bodies (5) through the slip rings (7). Then, this laser beam is reflected by the reflecting mirror (6) to irradiate the hole surface of the DUT (9), is reflected by the DUT (9) and enters the laser measuring instrument body (4), Convert to. This signal is taken out from the slip ring (7) and is connected to an arithmetic unit, a display, etc. not shown.

In the above embodiment, the laser distance measuring device is used as the distance measuring device, but other non-contact distance measuring device such as an eddy current position measuring device may be used. Further, in the above embodiment, two distance measuring elements are used, but only one may be used. Further, although the reflecting mirror (7) is used in the above embodiment, the reflecting mirror (7) is used because the laser measuring instrument body (5) cannot be used vertically because there is no space. If the laser measuring device body (5) can be used vertically, it is not necessary to use the reflecting mirror (7).

The present invention is not limited to the above-mentioned ones, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0011]

The present invention has the above-mentioned structure,
It has the following excellent effects. (1) It becomes easy to machine a difficult-to-measure portion such as a divergent hole. (2) It is possible to correct the cutting error caused by abrasion of the cutting edge, elastic deformation, etc. online, and solve the difference in measurement skill of the operator. (3) Measurement data can be automatically recorded. (4) It is particularly effective for an apparatus having a long processing range.

[Brief description of drawings]

FIG. 1 is a front view of a boring bar of the present invention.

FIG. 2 is a side view in which a part of the boring bar of the present invention is cut.

FIG. 3 is a schematic cross-sectional view in which the vicinity of the boring bar of the present invention to which a non-contact distance measuring element is attached is enlarged.

[Explanation of symbols]

 1 boring bar 2 boring bar main body 3 drive shaft 4 bytes 5 laser measuring instrument main body 6 reflecting mirror 7 slip ring 8 recess 9 measured object 10 distance measurement point

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshio Ohno 3-15-1 Hoyoshu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Co., Ltd. Toni Technical Center (72) Inventor Toshio Yoneyama Isogo-ku, Yokohama-shi, Kanagawa Shin-Nakahara Town No. 1 Ishi Kawashima Harima Heavy Industries Co., Ltd. Yokohama No. 1 Factory (72) Inventor Takeshi Kageyama No. 1 Shin Nakahara Town, Isogo-ku, Yokohama, Kanagawa Ishi Kawashima Harima Heavy Industries Co., Ltd. Yokohama No. 1 Factory

Claims (2)

[Claims] 1. A boring bar, wherein a non-contact distance measuring element (5) is attached to the boring bar body (2). 2. The boring bar according to claim 1, wherein the distance measuring element (5) is attached near the position of the bite (4).