JPH085304A - Thickness measuring device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an inexpensive thickness measuring device which is easy to initialize and is less affected by disturbances such as light and noise. [Structure] 2 to sandwich the DUT 1 whose thickness is to be measured
Two contactors 2a, 2b are provided, and two contactors 2a,
2b is provided such that the distance between the opposed surfaces can be freely expanded and reduced, and the magnetic sensors 3a, 3b, 3c are provided on one of the two opposed surfaces of the two contacts 2a, 2b. Has been.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the thickness of a plate or the like, and more particularly, it is suitable for use in measuring the plate thickness during arc welding of steel plates having various thicknesses. Is.

[0002]

2. Description of the Related Art Conventionally, in arc welding of steel sheets,
It is necessary to perform arc welding by setting the current, voltage, distance between arcs, etc. of the power source for arc welding to an appropriate value according to the thickness of the steel plate. It is necessary to measure.

By the way, as a conventional device for measuring the thickness of a steel plate or the like, for example, as described in Japanese Utility Model Laid-Open No. 2-110809, a plate thickness is measured by using a displacement measuring sensor such as a laser displacement meter. There is known a device for measuring.
Further, as described in, for example, Japanese Utility Model Laid-Open No. 4-106712, an apparatus for measuring the plate thickness using an X-ray generator and an X-ray detector is also known.

[0004]

However, in the conventional apparatus for measuring the plate thickness using the displacement measuring sensor such as the laser displacement meter or the measuring apparatus by the X-ray detection,
The initial setting to obtain the installation accuracy, that is, the setting of the optical axis with the light source, the setting of the wavelength, etc. is not easy,
There are problems that it takes time and effort to prevent obstacles due to disturbances such as light, noise, and spatter, and that the price is high.

The present invention has been made by paying attention to the above-mentioned problems in the conventional thickness measuring apparatus. The purpose of the present invention is to solve the above-mentioned problems and to facilitate the initial setting. An object of the present invention is to provide an inexpensive thickness measuring device which is less affected by disturbances such as light and noise.

[0006]

In order to achieve the above object, the thickness measuring device of the present invention is provided with two contactors for sandwiching an object to be measured whose thickness is to be measured. The child is provided such that the distance between the surfaces facing each other is freely expandable and contractable, and the magnetic sensor is provided on one of the two surfaces facing each other of the two contacts. It is a thing.

In the present invention, the shape of the object to be measured is not particularly limited, and may be, for example, a plate, a rod, a tube, a lump, etc. The material is not limited, and examples thereof include metals, synthetic resins, wood, glass, ceramics, and the like.

[0008]

The thickness measuring apparatus of the present invention is provided with two contact elements for sandwiching the object to be measured whose thickness is to be measured.
Since the distance between the facing surfaces of the individual contactor is freely expandable and contractable, and the magnetic sensor is provided on one of the two facing surfaces of the two contactors, By sandwiching the object to be measured with the two contact elements, the distance between the two contact elements becomes an interval according to the thickness of the object to be measured, and the thickness of the object to be measured is detected by detecting this distance with a magnetic sensor. Can be measured.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. [Embodiment] FIG. 1 is an explanatory view showing a usage state of an example of the thickness measuring apparatus of the present invention. In FIG. 1, reference numeral 1 denotes a grooved steel which is an object to be measured, and the thickness T of the leg piece portion 11 of the grooved steel 1 is measured by the thickness measuring apparatus of the present invention, and the thickness measured by the thickness measuring apparatus of the present invention. By flowing the value of T to an automatic welding line (not shown), the welding conditions of the automatic welding line are set to try to weld the channel steel 1 under appropriate conditions. still,
The thickness T of the leg piece 11 of the channel steel 1 as the measured object is 2.3.
There are three types of mm, 3.2 mm, and 4.5 mm.

Reference numerals 2a and 2b are contacts of the thickness measuring apparatus of the present invention, and the contacts 2a and 2b are designed so that the distance between them can be increased or decreased by an air cylinder 4.
The leg pieces 11 of the channel steel 1 which is the object to be measured can be sandwiched by the tip portions of a and 2b. Three magnetic sensors 3a, 3b, 3c are attached to one contactor 2a, and the distance L from the other contactor 2a is detected by these magnetic sensors 3a, 3b, 3c.

Each magnetic sensor 3a, 3b, 3c is 1/10
With the measurement accuracy of 0 mm, and by setting the sensitivity in advance as shown in Table 1, the contact 2 can be set within the range of the set distance L.
When b is detected, the relay turns on (ON).

[0012]

That is, in the magnetic sensor 3a, the leg pieces 1 whose both contacts 2a, 2b have a thickness T = 4.5 mm or less.
When 1 is sandwiched, the interval L with the other contact 2a is detected, a relay is turned on (ON), and a signal is sent to an automatic welding line (not shown). In the magnetic sensor 3b, when both the contacts 2a, 2b sandwich the leg piece 11 having a thickness T of 3.2 mm or less, the relay is detected by detecting the distance L from the other contact 2a ( ON), a signal is sent to an automatic welding line (not shown). In the magnetic sensor 3c, both contacts 2a, 2b have a thickness T =
When the leg piece 11 of 2.3 mm or less is sandwiched, the distance L between the other contact 2b is detected and the relay is turned on (ON),
A signal is sent to an automatic welding line (not shown).

[Operation of Embodiment] Next, the operation of the illustrated thickness measuring apparatus of the present invention will be described. Thickness T = 2.3 mm
When the grooved steel 1 having the leg pieces 11 of the above reaches the thickness measuring device of the present invention, both contacts 2 are actuated by the operation of the air cylinder 4.
a and 2b sandwich the leg piece 11 of the channel steel 1 and detect the distance L from the other contact 2b to detect the three magnetic sensors 3a and 3a.
All the relays b, 3c are turned on and the signal is sent to an automatic welding line (not shown), and the thickness T =
Welding is performed under appropriate conditions that are compatible with the 2.3 mm leg pieces 11.

When the groove steel 1 having a leg piece 11 having a thickness T = 3.2 mm reaches the thickness measuring apparatus of the present invention, the air cylinder 4 is actuated so that both contacts 2a, 2b of the groove steel 1 have legs. By sandwiching the piece 11 and detecting the distance L to the other contactor 2b, the relays of the two magnetic sensors 3a, 3b out of the three magnetic sensors 3a, 3b, 3c are turned on, and the signal is shown. Not sent to the automatic welding line, in which the welding is performed under appropriate conditions adapted to the leg piece portion 11 having a thickness T = 3.2 mm.

When the groove steel 1 having a leg piece 11 having a thickness T = 4.5 mm reaches the thickness measuring device of the present invention, the actuation of the air cylinder 4 causes both contacts 2a, 2b of the groove steel 1 to be legs. One of the three magnetic sensors 3a, 3b, 3c is inserted into the relay by detecting the distance L between the other contactor 2b and the one piece 11, and the signal is not shown. It is sent to an automatic welding line, and welding is performed on the automatic welding line under appropriate conditions suitable for the leg piece 11 having a thickness T = 4.5 mm.

The embodiments of the present invention have been described above with reference to the drawings. However, the specific configuration of the present invention is not limited to the illustrated embodiments, and design changes within the scope not departing from the gist of the present invention are as follows. Included in the invention.

For example, in the illustrated embodiment, all three magnetic sensors 3a, 3b, 3c are provided only on one contactor 2a, but these three magnetic sensors 3 are provided.
One or two magnetic sensors a, 3b, and 3c may be provided on the other contactor 2b.

[0019]

According to the thickness measuring apparatus of the present invention, the distance between the two contact elements becomes an interval according to the thickness of the object to be measured by sandwiching the object to be measured with the two contact elements. The thickness of the object to be measured can be measured by detecting it with a magnetic sensor. In the thickness measuring device of the present invention, the structure is simple, the magnetic sensor is inexpensive, the man-hours for initial setting are not required unlike the conventional device, and the influence of disturbance is small.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a usage state of an example of a thickness measuring device of the present invention.

[Explanation of symbols]

 1 DUT 2a, 2b Contactor 3a, 3b, 3c Magnetic sensor 4 Air cylinder

Claims (1)

[Claims] 1. Two contact elements sandwiching an object to be measured whose thickness is to be sandwiched are provided, and the two contact elements are provided such that the distance between their opposing surfaces can be increased or decreased. A thickness measuring device characterized in that a magnetic sensor is provided on one of the two surfaces of the individual contacts facing each other.