JPS59178311A - Dimension measuring apparatus - Google Patents

Abstract

PURPOSE:To measure a dimension with good accuracy even in an object to be measured comprising a low hardness material, by a method wherein an apparatus for detecting pressure applied to a measuring surface is provided to simultaneously detect the pressure and the dimension while the dimension under predetermined pressure is displayed as a measured value. CONSTITUTION:After a dial gauge 21 is secured at a predetermined height, a spindle 22 is downwardly moved and a dimension display apparatus 7 is set to zero. In the next step, an object to be measured is grasped by a surface plate and a measuring surface 23 while the spindle 22 is downwardly moved to apply measuring pressure and the dimension value at the point of time when said pressure reaches predetermined pressure is set as the dimension of the object to be measured. Because a bellows 15 is extended and contracted by the movement of the measuring surface 23, the pressure transmitting medium 10 sealed therein transmits pressure to a pressure converting apparatus 9 to display the measuring pressure by a pressure display apparatus 12. In addition, simultaneously with display of the pressure, a comparison signal 24 is outputted to a dimension value A/D converting apparatus 6. This dimension value A/D converting apparatus 6 is provided with a circuit for temporarily holding the display of the dimension value and, by inputting the comparison signal 24 thereto, the dimension value under predetermined measuring pressure can be displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an apparatus for measuring dimensions, movement amounts, displacement amounts, etc. (hereinafter collectively referred to as dimensions) of an object.

[Technical background of the invention and its problems]

Generally, to measure the dimensions of an object, the amount of movement of a measuring surface on a measuring device such as a caliper, a gauge, a micrometer, or a dial gauge is expressed by a scale attached to the measuring device. Additionally, the amount of movement is electrically detected and displayed using light or the like.

To measure with a caliper, move the slider, hold the object to be measured between the measurement surfaces, and read the amount of slider movement. In the same way, when measuring with a micrometer, the object to be measured is moved by a spin + angle, held between measurement surfaces, and the amount of movement is read. Also no・
When measuring with a light gauge or dial gauge, the distance of movement of the slider or spindle to the measuring point on the object to be measured is read using a reference point such as a surface plate as the zero point. All of these measuring instruments are used by bringing the measuring surface of the measuring instrument into contact with the object to be measured, but calipers and Noruit gauges in particular do not have an adjustment mechanism for the measuring pressure at the time of contact (hereinafter referred to as measuring pressure). Therefore, measurements were performed based on the empirical pressure of the measurer. When measuring dimensions of metal materials or materials with equivalent hardness, the magnitude of the measurement pressure does not matter, but when the object to be measured is a material with relatively low hardness such as plastic materials, textiles, felt,
Since the dimensions vary greatly depending on the measurement pressure, the measurement values vary depending on the measurer and also vary depending on the measurer at the time of measurement.

A micrometer is equipped with a ratchet stop or a friction stop as a mechanism for determining the measured pressure. However, the pressure measured by the mechanical mechanism is only 5 [N] to 15 [N] for 15O3611, which is a value that takes into account a wide range of variation. For this reason, the pressure measured by each micrometer was different.

Dial gauges also serve as a mechanism for determining measurement pressure.
A retraction spring is provided which pulls back the spindle, the force of which applies the measuring pressure. Measurement pressure cover example construction is JIS B
7503 f, [Measuring pressure must not exceed 140 (gf), the difference between the maximum and minimum measuring force is 60 [gL]
Therefore, there is a difference in the measured pressure with one dial gauge, and even with - dial gauges, the measured pressure varies depending on the position of the spindle. There was a difference.

As described above, although micrometers and dial gauges have the function of applying measurement pressure, the measurement pressure is not constant, so they are not suitable for quality control in production processes that handle materials with relatively low hardness. Furthermore, depending on the type of material or the purpose of quality control, it was not possible to measure the dimensions by changing the 6111 constant pressure.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a dimension i'1lll determination device that can improve the drawbacks of the conventional dimension measuring devices as described above and can accurately measure the dimensions of objects to be measured made of materials with low hardness.

[Summary of the invention]

In order to achieve the above object, the dimension o11J determination device of the present invention is provided with a device for detecting the pressure applied to the measurement surface,
Dimensions and pressure are detected at the same time, and the dimensions at a predetermined pressure are displayed as measured values.

[Embodiments of the invention]

The configuration of an embodiment of the present invention-1 will be described with reference to FIGS. 1 and 2. The dimension measuring device includes a dimension processing device 1, a pressure detection device 2, a storage device 3, and an external output device 4. The dimension processing device 1 has a dimension processing device 5 and a dimension value A/
It consists of a D conversion device 6 and a dimension display device 7. The pressure detection device 2 includes a pressure input device 8 and a pressure conversion device 9, and the pressure conversion device 9 includes a pressure value A/D conversion device 10, a comparison device 11, and a pressure display device 12.

The pressure input device 8 houses a bellows 15 provided with a screw 14 at the bottom for mounting the measuring surface in its bellows holder 13 . The pressure value Aρ conversion device 10 has a pressure conversion element and converts an analog value of pressure into a digital value. The pressure conversion element receives pressure from a pressure-sensitive semiconductor conversion element or a pressure-sensitive crystal transmission element.

The pressure transmission port 16 of the pressure input device 8 and the pressure conversion element of the pressure value A/D conversion device 10 are connected to the pressure tube 17, the bellows 15, the pressure tube 17 and the pressure value A/D.
Oil or air is sealed as a pressure transmission medium 18 inside the pressure conversion element of the conversion device 10.

The bellows holder 13 is provided with an upper mounting screw 20 for mounting to an internal pressure adjustment port 19 or a dimensional loss 11 regulating device.

The dimension determination device configured in this way simultaneously converts and displays the dimension value and its measured pressure value (A/T), and also compares the measured pressure with the pressure set in advance by the comparator 11, and performs the measurement. When the pressure becomes larger than the set pressure, both ~Φ conversion processes are stopped, and the dimensional values at the measured pressure equal to the set pressure are displayed and stored.

Part 3 regarding the dial type dimension measuring device to which the present invention is applied
This will be explained with reference to the figures.

To measure dimensions using the dial gauge type dimension measuring device of the present invention, after fixing the dial gauge 21 at a predetermined height, the spindle 22 is moved downward, and the measurement surface 23 is moved downward.
is pressed against the zero point, for example, a surface plate, to reach a predetermined measurement pressure, and the dimension display device 7 is set to "zero". Next, the object to be measured is placed on the surface plate and the measuring surface 23 (Kasami, Spind J
L/22 is moved downward, measurement pressure is applied, and the dimension value at the time when a predetermined pressure is reached is defined as the dimension of the object to be measured. Since the bellows 15 expands and contracts due to the movement of the measurement surface 23, the pressure transmission medium 18 enclosed therein transmits the pressure to the pressure converter 9 and displays it on the pressure display device 12. Further, at the same time as the pressure is displayed, a comparison signal 24 is output to the dimension value A/D converter 6. Dimensional value Aρ conversion device #6 is provided with a circuit that temporarily holds the display of the dimensional value, and by inputting the comparison signal 24, it is possible to display the dimensional value at a predetermined measurement pressure.

Since the pressure input device 8 of the pressure detection device 2 has a bellows mechanism, it can be made smaller and can be installed between the measurement unit 23 of the dial gauge 21 and the spindle 220.

The pressure-sensitive semiconductor conversion element and the pressure-sensitive quartz crystal element of the pressure conversion device 9 can be used as a signal for easily converting pressure into an amount of electricity. A pressure tube 17 connecting the pressure input device 8 and the pressure conversion device 9 is filled with air as a pressure transmission medium. Air has a large pressure transmission loss, but maintenance is easy. It is also possible to use oil with low pressure transmission loss, although maintenance is difficult. For measurements at high temperatures, a pressure transmitting material with low thermal expansion is required.

The dial gauge shape size measuring device of the present invention is capable of measuring the dimensions of materials with relatively low hardness, especially tape-shaped or sheet-shaped thin objects, with a constant measurement pressure or with various pressures.

A micrometer type dimension measuring device as an embodiment of the pond according to the present invention will be explained with reference to Fig. J4.

A pressure input device 8 is provided between the anvil 26 of the micrometer 25 that electrically processes and displays dimensional values and the measurement surface 230, and is connected to the pressure transducer 9 with a pressure catheup 17 containing a pressure transmission medium, for pressure detection and pressure. Perform display. The dimension value is manually input to the dimension rIiA/1) conversion device 6 via the dimension value signal line 27. The object to be measured is the measurement surface 23 and the spindle 2.
Since the measurement pressure and dimensional values are displayed simultaneously, it is possible to measure dimensions with a constant measurement pressure or under various pressures, especially for block-shaped objects made of relatively low hardness materials.

A caliper type dimension measuring device as another embodiment of the present invention will be described with reference to FIG. A pressure input device 8 is provided on the mount 29 of a caliper 28 that electrically processes and displays dimensional values, and the lower part of the bellows 15 is attached to the measuring surface 23 on the screw 14.
will be established. Pressure tube 1 enclosing pressure transmission medium 18
7 connects the pressure converting device 9 integrated with the dimension display device 7 and the pressure input device 5 to perform pressure detection and pressure display.

The dimension value is directly displayed on the dimension display 7 by the amount of electricity using light or the like depending on the amount of movement of the jaw 29. The object to be measured is the measurement surface 23
With scissors, the measured pressure and dimension value are displayed at the same time, so
You can easily measure the dimensions of large objects made of materials with relatively low hardness with one hand while keeping the measurement pressure constant or under valley pressure.

〔Effect of the invention〕

As explained above, in the present invention, the pressure measured by a dimension measuring device such as a dial gauge type, micro gauge type, or caliper type is converted into an electrical quantity using a pressure input device using a bellows and a pressure tube containing a pressure transmission medium. Since it is possible to measure with a pressure detection device consisting of a transducer, it is possible to measure the dimension value of the object to be measured and its measurement pressure at the same time. Dimensions can be measured.

Therefore, it is also possible to eliminate dimensional measurement errors caused by uneven pressure during measurement.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the dimension measuring device of the present invention, FIG. 2 is a sectional view showing an embodiment of the pressure input device used in the dimension measuring device of the present invention, and FIG. 3 is a block diagram showing the configuration of the dimension measuring device of the present invention. A configuration diagram showing a dial gauge type dimension measuring device according to an embodiment,
FIG. 4 is a block diagram showing a micrometer type dimension measuring device according to a 1 m embodiment of the present invention, and FIG. 5 is a block diagram showing a caliper type dimension measuring device as yet another embodiment of the invention. 1 Dimension processing device 2 Pressure detection device 3...Storage device 4, External output device 5--Dimension manual device 6
・Dimension value A/D conversion device 7 ・Dimension display device 8 Pressure input device d9...Pressure conversion device 10.Pressure value A/
D conversion device 11-comparison device 12-pressure display device 130. Bellows holder 14・Bottom number is screw J
5 Bellows 16・Pressure transmission port 17 Pressure tube 18 Pressure transmission medium 19−・Internal pressure adjustment port
20 Upper mounting screw 21- Dial gauge
22 Spindle 23/Measurement surface 24 Comparison signal 25 Micrometer 26/Anobil 27
...Dimension value signal line 28-Caliper 29 Figure 1 Figure 2 Figure 3 Cause Figure 4 L1

Claims (1)

[Claims] 1. A measuring surface that contacts the object to be measured, a dimension processing device that detects and displays the position of this measuring surface, and a pressure detecting device that detects and displays the pressure applied to the measuring surface. A dimension measuring device characterized by: 2. The pressure detection device includes a pressure input device provided close to the measurement surface, a pressure conversion device connected to the pressure input device by a pipe, and an electrical connection to the pressure conversion device and the dimension processing device. 2. The dimension measuring device according to claim 1, further comprising a comparison device for comparing a set pressure value and a detected pressure value, and a pressure display device connected to the comparison device. 3. The dimension measuring device according to claim 2, wherein the pressure input device includes a bellows containing a pressure transmission fluid.