JP2000018925A - Internal size measuring instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To measure with high accuracy the internal size of a mold cavity for casting with efficiency. SOLUTION: This internal size measuring instrument 1, which measures the internal size in a horizontal plane of the mold cavity of a mold 35 for casting, is equipped with a size difference detecting means 3 which detects the size difference between the internal size and a previously set reference size, an operation means 15 which can insert the size difference detecting means into a mold cavity 36 from an opening part 43 of the mold cavity and extract it from the mold cavity 36 and swivel the size detecting means 3 in the horizontal plane, and a positioning means 24 which can position the operating means 15 vertically and horizontally, and the internal size of the mold cavity 36 of the mold for casting is measured with high accuracy and with efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inner size measuring device for measuring an inner size of a space opening on a surface of an object to be measured.

[0002]

2. Description of the Related Art Conventionally, when measuring the inner dimensions of an object to be measured whose inner dimensions are to be measured in a space opening on the surface, for example, the inner dimensions of a casting mold (continuous casting mold), the width of the casting mold is changed. Often done when you do. in this case,
Conventionally, a casting mold that is online is transferred to an offline maintenance table, the width of the mold cavity is changed, and the width is measured for confirmation. In this case, as a width measuring device, a caliper, a compass for inside measurement, a scale, and other measuring devices are used directly or in an appropriate combination. The width is corrected and the width is set to the intended width while checking the width using such a measuring device. Thereafter, the casting operation is performed online.

[0003]

The above conventional measuring apparatus uses measuring instruments such as a caliper and an inner compass directly or in an appropriate combination, so that variations due to measuring conditions such as measuring instruments, locations, and measuring persons. It is large and time-consuming, and it is insufficient to accurately and reliably and efficiently perform the inner dimensions of the casting mold. Further, when the height (or depth) of the mold cavity is large, it has been difficult to accurately measure the inside dimension of the lower side of the cavity, particularly the lowermost end. Further, it has been difficult to automate the measurement by using the above-mentioned conventional measuring equipment.

An object of the present invention is to accurately and efficiently measure an inner dimension of a space opening on a surface of an object to be measured.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to an internal dimension measuring apparatus for measuring an internal dimension in a horizontal plane of a space opening on a surface of an object to be measured. Dimensional difference detecting means for detecting a dimensional difference from a predetermined reference dimension, and the dimensional difference detecting means can be inserted into and extracted from the space from the opening of the space, and the dimensional difference Operation means capable of turning the detection means in a horizontal plane, and positioning means for positioning the operation means in the vertical and horizontal directions.

According to the above internal size measuring device, the operating means is positioned in the vertical and horizontal directions by the positioning means. The operation means to be positioned inserts the dimensional difference detecting means into the space from the opening of the space, and turns the dimensional difference detecting means in a horizontal plane at a measurement position in the space. Further, the dimensional difference detecting means detects a minimum dimensional difference at the measurement position in the space turned by the operating means. The separately provided controller calculates the minimum dimensional difference detected by the dimensional difference detecting means by adding a preset reference dimension, so that the inner dimension at the measurement position in the space can be accurately and reliably measured. When the inside dimension is measured, the operating means pulls out the dimension difference detecting means from the space, and the measurement ends.

Further, in the internal dimension measuring device, the sensor for detecting the internal dimension used for the dimension difference detecting means is a contact for measuring the internal dimension by coming into contact with the inner side wall of the space of the object to be measured. Although a type sensor may be used, a non-contact type laser sensor using a light beam, particularly a laser beam, may be used. In the case of a contact-type sensor, there is a possibility that the measurement person will vary depending on the perpendicularity of the measuring instrument and how it is applied.However, by using a non-contact type laser sensor, anyone can easily distance the sensor from the mold side wall. Can be measured accurately.

[0008] In addition, the object is to provide an inner dimension measuring method for measuring an inner dimension in a horizontal plane of a space portion opening on the surface of an object to be measured, wherein the minimum dimension between the inner dimension and a preset reference dimension is measured. It is also achieved by detecting a difference and calculating the inner dimension from the smallest dimension difference. By calculating by adding the reference dimension to the detected minimum dimension difference, the inner dimension in the horizontal plane at the measurement position in the space can be accurately and reliably measured.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of an inner size measuring apparatus according to the present invention. 1 to 6, the same or equivalent parts are denoted by the same reference numerals.

The internal dimension measuring apparatus of the present embodiment measures an inner dimension in a horizontal plane of a mold cavity (space) opened on the surface of a casting mold (continuous casting mold) as an object to be measured. Things.

FIGS. 5A and 5B are explanatory diagrams for measuring the inner dimensions of the mold cavity in the inner size measuring apparatus of the present embodiment. FIG. 5A is a partially omitted plan view, and FIG. . Mold cavity 36 of casting mold 35
Are mainly opposed fixed side walls 37, 38 and fixed side copper plates 44, 45 fixed to the side walls 37, 38;
Opposite movable side walls 39, 40 and the side walls 39, 4
The movable copper plates 46 and 47 are fixed to zero.
The movable side walls 39 and 40 and the copper plates 46 and 47 are driven by drive means 48 such as a hydraulic cylinder, and the position thereof is movable, and the width of the mold cavity 36 (the left-right direction in FIG. 5) can be adjusted. The copper plates 44, 45, 46, 47 are water-cooled at the time of casting by water flowing through the inside. Also,
In FIG. 5A, copper plates 44, 45 and copper plates 46, 47
There is a gap between them, but they are actually in slidable contact.

When the width of the casting mold 35 is changed, the movable side walls 39 and 40 and the copper plates 46 and 47 are moved.
The inside dimension L of the mold cavity 36 shown in FIG. 5B, for example, the inside dimensions L ₁ , L ₂ , L ₃ is measured and adjusted to a set value. The inner dimensions L ₁ , L ₂ , L _3, etc. are dimensions in a horizontal plane in the mold cavity 36, and the measurement positions are determined in the vertical direction as required, for example, at three places.

FIG. 1 is a front view showing an embodiment of an inner size measuring device according to the present invention. FIG. 2 is a plan view of FIG. FIG. 3 is a side view of FIG. The internal dimension measuring device 1 of the present embodiment includes a dimension difference detecting unit 3 for detecting a dimension difference ΔL between an inside dimension L shown in FIG. 5 and a preset reference dimension Ls (shown in FIG. 6), and The difference detecting means 3 is moved from the opening 43 of the mold cavity 36 to the mold cavity 3.
An operating means 15 capable of being inserted into and withdrawn from the mold cavity 36 and capable of turning the dimension difference detecting means 3 in a horizontal plane; and a positioning means 24 for positioning the operating means 15 in the vertical and horizontal directions. Is provided.

The dimensional difference detecting means 3 includes two laser sensors 8 for actually detecting a dimensional difference ΔL between the inner dimension L and a preset reference dimension Ls;
Two L-shaped reference blocks 6 for positioning when mounting the mounting plate, and a mounting plate 4b for fixing the reference blocks 6
And a mounting plate 4a for fixing the mounting plate 4b with fastening means such as bolts and nuts. The dimension difference detecting means 3 determines the size of the mold cavity 36, for example, L = 200, 3
Several sizes are prepared according to 00 and 400 mm, and are replaced as necessary.

The operating means 15 includes a vertical / swivel shaft 16 for fixing and supporting the mounting plate 4a of the dimensional difference detecting means 3 at the lower end with bolts and nuts and mounting the handle 17 at the upper end.
A slide saddle 18 that slidably supports the vertical / swiveling shaft 16, a shaft fixing collar 22 that fixes the vertical / swiveling shaft 16 at a required position, and slides with both ends fixed to a base 26 by brackets 21. And two guide bars 20 arranged in parallel at a predetermined interval to support the saddle 18 slidably in the horizontal direction. The up / down / swivel shaft 16 can be moved and fixed in the vertical direction and swiveled and fixed in a horizontal plane by tightening and loosening a fixing screw 22a of the shaft fixing collar 22. The slide saddle 18 can be moved and fixed along a guide rod 20 by tightening and loosening a knob 19.

The positioning means 24 is for positioning the operation means 15 in the vertical and horizontal directions.
The base 26, the positioning pads 28a and 28b supported by the base 26 and positioned in the horizontal direction, and the base 2
6 and a vertical positioning pad 3
1a and 31b. The positioning pad 28a in the horizontal direction is on the fixed side, and the positioning pad 28b is on the movable side, and can be moved by the horizontal adjustment handle 29. Similarly, the positioning pad 31a in the vertical direction is on the fixed side, and the positioning pad 31b is on the movable side, and can be moved by the vertical adjustment handle 32b. The vertical adjustment handle 32a is fixed without being operated normally.
The pads 28a and 28b for fixing in the horizontal direction are prepared in several types according to the size of the mold cavity 36, for example, L = 200, 300, and 400 mm, as in the case of the dimension difference detecting means 3, and as necessary. Replace it.

FIG. 4 is a perspective view of a laser sensor used in the inner size measuring device 1 shown in FIGS. This laser sensor 8 is a laser analog sensor and is a light emitting unit 8a.
The laser beam is radiated from and receives the laser beam reflected by the light receiving section 8b. As the laser light source, a laser diode having a wavelength of several hundred nm and a pulse width of several μs is used. Reference numeral 8c denotes a beam stopper, and reference numeral 8 denotes a beam stopper.
d indicates a measurement range display LED, 8e indicates a laser emission display LED, and 9 indicates a cable.

The internal dimension measuring apparatus 1 of the present embodiment having the above-described structure operates as follows. That is, the operation means 1
5 is positioned in the vertical and horizontal directions by the positioning means 24, and the vertical / swiveling shaft 16 of the operating means is arranged near the central axis of the opening 43 of the mold cavity. The positioned operation means 15 inserts the dimension difference detection means 3 into the cavity 36 from the opening 43 of the mold cavity. The operating means 15 includes the cavity 3
At the measurement position within 6, the size difference detecting means 3 can be turned in a horizontal plane.

As shown in FIG. 5, the laser sensor 8 of the dimensional difference detecting means turned by the operating means 15 (not shown) detects the minimum dimensional difference ΔLmin at the measurement position 13a in the mold cavity 36 by the turning.
The measuring position 13b and the measuring position 13c are movable copper plates 46, 4
7, and the dimensional difference ΔL at this measurement position is not minimized.

FIG. 6 is a diagram showing the relationship between the inner dimensions of the mold cavity and the laser sensor according to the present embodiment.
Minimum dimension difference ΔLmin detected by laser sensor 8 of the dimension difference detecting means by a separately provided controller
Is calculated by adding the preset reference dimension Ls to the inner dimension L at the measurement position in the mold cavity 36 with high accuracy and reliability. The following is a mathematical expression.

Inside dimension L = reference dimension Ls + minimum dimension difference ΔLmin Minimum dimension difference ΔLmin = ΔL ₁ + ΔL _{2 When the} inside dimension L is calculated, the data is digitally displayed. Then, the dimension difference detecting means 3 is again pulled out of the mold cavity 36 by the operating means 15, and the measurement is completed.

Next, a method of using the inner size measuring device 1 will be described in numerical order with reference to FIGS.

The required size difference detecting means 3 is selected in accordance with the required size (200, 300, 400 mm) of the mold cavity 36, and the vertical / rotating shaft 1 of the operating means is selected.
6 and the laser sensor is attached with a sensor cover to prevent damage.

The vertical positioning pads 31a and 31b of the positioning means are placed on the upper surface of the casting mold 35, and the vertical positioning is performed in consideration of the left and right horizontal state.

The size of the mold cavity (20
(0, 300, 400 mm), the horizontal positioning pads 28a, 28b of the positioning means are selected and attached to the mounting screw portion of the base 26. The fixed pad 28a for horizontal positioning is pressed against one copper plate surface of the mold cavity, and the movable pad 28b is rotated by rotating the handle 29 for horizontal direction adjustment. I do.

The slide saddle 18 of the operating means is slid, and the vertical / rotating shaft 16 of the operating means is positioned so as to be located substantially at the vertical center axis position of the mold cavity.
It is preferable that the vertical / swivel shaft 16 be located at a substantially vertical center axis position of the mold cavity 36.

The dimensional difference detecting means 3 is operated by the operating means 15.
Is set at a depth position to be measured in the mold cavity 36, and the minimum dimensional difference ΔLmin is detected while turning. From the detected value of the minimum size difference ΔLmin, the controller digitally displays the internal dimension L of the position to be measured in the mold cavity 36.

The following points are made possible by the inner size measuring apparatus 1 of the present embodiment.

Since the inner dimension L of the casting mold mounted on-line can be measured efficiently and with high accuracy, the width of the casting mold can be changed online.

Conventionally, when the width was changed on-line, the innermost dimension L at the lowermost end of the casting mold, for example, at a depth of 900 mm could not be accurately measured. Measurement of the inner dimension L at a deep position is possible.

The measurement device can be reduced in weight, can be carried by one person, and can be easily measured online or offline.

The digitization of the detection data makes it easy to automate the measurement.

Next, the object of the present invention can also be solved by the following inner size measuring method. That is, in the inner dimension measuring method for measuring the inner dimension L in the horizontal plane of the mold cavity opened on the surface of the casting mold (object to be measured), the inner dimension L and a preset reference dimension Ls
And the minimum dimensional difference ΔLmin is detected.
This is to calculate the inside dimension L from min. According to this measurement method, the inner dimension L in the horizontal plane at the measurement position in the mold cavity is accurately and efficiently measured by adding the reference dimension Ls to the minimum dimension difference ΔLmin at the measurement position in the mold cavity. can do.

[0034]

According to the internal dimension measuring apparatus of the present invention, the inner dimension of the space opening on the surface of the internal dimension measuring object can be precisely measured.
Can be measured efficiently.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of an inner size measuring device according to the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a side view of FIG. 1;

FIG. 4 is a perspective view of a laser sensor.

5A and 5B are explanatory diagrams for measuring an inner dimension of a mold cavity in the present embodiment, wherein FIG.
(B) is a partially omitted cross-sectional view.

FIG. 6 is a diagram showing a relationship between a mold cavity inner dimension and a laser sensor according to the embodiment.

[Explanation of symbols]

1 inside dimension measuring device 3 dimensional difference detector 15 Operation unit 24 positioning means 35 the casting mold (the inside dimension measured) 36 the mold cavity (space) 43 opening _{L, L 1, L 2,} L 3 internal dimension Ls Reference dimension ΔL Dimension difference

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Masaharu Tsuda 4-9809-6 Dogo Honcho, Hasaki-cho, Kashima-gun, Ibaraki Prefecture 402 Japan Synthetic Rubber Shoto Ryo 402 (72) Inventor Yoshinori Tauchi 3 Fukashiba Minami, Kamisu-cho, Kashima-gun, Ibaraki Prefecture 2-2-3 No.2 Nanbu Apartment No. 205 (72) Inventor Hideo Fujisaki 391 Shirai, Omigawa-machi, Katori-gun, Chiba F-term (reference) 2F065 AA06 AA27 AA52 DD06 FF12 GG06 GG07 JJ05 MM07 MM08 PP03 PP05 PP22 SS03 UU03 4E004 AE10

Claims (1)

[Claims] An internal dimension measuring device for measuring an internal dimension in a horizontal plane of a space portion opened on a surface of an object to be measured, wherein a dimension difference between the internal dimension and a preset reference dimension is detected. Difference detecting means, operating means capable of inserting the dimension difference detecting means into and out of the space from the opening of the space, and capable of turning the dimension difference detecting means in a horizontal plane; An inner dimension measuring device comprising: a positioning means for positioning the operation means in a vertical direction and a horizontal direction.