JPH0518365B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for measuring the wall thickness of a cylindrical body such as a tube or pipe.

(Prior Art) Conventionally, micrometers, calipers, and the like have been used to measure the thickness of paper, film, iron plates, and the like. In addition, when measuring the wall thickness of cylindrical bodies such as pipes and tubes, the measurement equipment was manually operated and measured artificially, which was inefficient at the production site and caused variations due to individual differences. It was hot too.

The conventional method described above has the problem that it is necessary to measure each measurement point once, and that the data is limited to specific measurement points and cannot be measured continuously.

(Problems to be Solved by the Invention) The present invention provides a method for measuring the wall thickness of a cylindrical body that enables efficient, accurate and continuous measurement of the wall thickness of such a cylindrical body. The purpose is to provide a method for measuring.

(Means for Solving the Problems) In order to achieve the above problems, the inventors of the present application conducted extensive research and finally completed the present invention.

That is, the present invention includes a cylindrical member that is rotatably provided around a horizontal axis, and a cylindrical member that is disposed on the lower side of the cylindrical member to the side of the open end and that is symmetrical to the central axis of the cylindrical member, and that the central axis is aligned with the horizontal axis. a support member consisting of at least one set of rollers rotatably provided parallel to the
a rotor that is in pressure contact with the cylindrical member in parallel to the cylindrical member and is swingable on a vertical line passing through the central axis of the cylindrical member;
It is equipped with a micrometer that measures the amount of movement of the rotor by placing its tip in contact with the rotor on a vertical line passing through the central axis of the cylindrical member, one end of which is placed over the cylindrical member, the micrometer is pressed by the rotor, and the outer periphery of the other end is covered with a supporting member. The method is characterized in that the wall thickness of the cylindrical body is measured by horizontally rotating the cylindrical body supported by the cylindrical body.

(Function) According to the above configuration, the cylindrical body is placed over the cylindrical member and rotated around the horizontal axis, and the amount of movement of the rotor is measured with a micrometer while being pressed by the rotor.
The wall thickness of the cylindrical body can be measured.

(Example) An example of the present invention will be specifically described below based on the drawings.

FIG. 1 is a perspective view of an apparatus embodying this embodiment. The cylindrical member 1 is a rotating roll that is rotatably provided around a horizontal axis and is connected to a motor 5 so as to be rotated as required.

The outer diameter of the cylindrical member 1 is smaller than the inner diameter of the cylindrical body 2, and one end of the cylindrical body 2 is removable. The cylindrical member 1 is preferably a metal roll, but is not particularly limited.

On the side of the lower open end of the cylindrical member 1, there is a cylindrical member 1
At least one set of support members 3, which are rotatably provided with their center axes parallel to the horizontal axis, are provided symmetrically about the center axis of the support member 3.

In this example, the support member 3 is fixed to a support provided on the base, but in some cases, the position can be adjusted in the left-right direction (line symmetrical to the central axis of the cylindrical member 1), and the height can also be adjusted. It is desirable to make this possible, and by doing so, it becomes possible to measure the wall thickness of cylindrical bodies 2 having different pipe diameters. The support member 3 is not limited to a bearing, but may be of any rotatable roll shape.

The rotor 6 is provided at the tip of a lever 12 that presses into contact with the cylindrical member 1 on a vertical line passing through the central axis of the cylindrical member 1 and is swingably supported by a fulcrum 8 . The rotor 6 is made of a free bearing, and its axis is provided parallel to the axis of the cylindrical member 1. An air cylinder 9 is connected to a predetermined position of the lever 12, and a push spring 10 is also connected.

The air cylinder 9 is connected to the lever 12 when raising the lever 12, releases the lever 12 when lowering the lever 12, and moves the rotor 6 up and down as necessary to attach and detach the cylindrical body 2. The cylindrical member 1 is pressed or released through the cylindrical member 1.

The push spring 10 rotates the cylindrical body 2 according to the rotation of the cylindrical member 1 by pressing the rotor 6 against the cylindrical member 1 and pressing and holding the cylindrical body 2 placed on the cylindrical member 1. Rotate child 6.

The micrometer 4 has its tip 7 connected to the cylindrical member 1
The rotor 6 is brought into contact with the rotor 6 on a vertical line passing through the central axis of the rotor 6. The tip 7 is fitted with ceramic as shown in FIG. This is because the tip 7 is in contact with the surface of the rotor 6, so as the rotor 6 consisting of a bearing rotates, the tip 7 may wear out, so it is preferable to use a durable and hard material such as diamond, sapphire, etc. There is no particular restriction, as long as a material that is difficult to bend can be used.

It is desirable to use an electric micrometer as the micrometer 4, and to connect it to a computer (not shown), and to connect a display instrument such as a printer, a counter, and a display lamp to the computer. With this configuration, the micrometer 4
It is possible to display measurement data automatically, and if the data management information is stored in the computer in advance, it is possible to immediately report with an indicator lamp, etc. when data exceeding the control value is measured. becomes.

The display lamp 11 shown in FIG. 1 is for reporting abnormal data, and it may be recorded by a printer or read by a counter if necessary.

By using a stepping motor, the motor 5 can appropriately set the rotational speed of the cylindrical body 2, measurement points, etc., and can also be connected to a computer.

Next, the measurement procedure according to the method of the present invention will be explained. First, the rotor 6 is brought into pressure contact with the cylindrical member 1 without covering the cylindrical member 1 with the cylindrical body 2, the tip 7 of the electric micrometer 4 is brought into contact with the rotor 6, and the motor 5 is turned on. At this time, the air cylinder 9 connected to the lever 12 supporting the rotor 6 descends to release the lever 12, and the lever 1
The pressing force of the pressing spring 10 is acting on 2.

The rotor 6 moves up and down according to its height on a vertical line passing through the central axis of the cylindrical member 1, and the amount of movement is detected by the tip 7 of the electric micrometer 4. The amount of movement A detected by the tip 7 is stored in the computer and used as the zero point of the measuring device of this embodiment.

Next, one end of the cylindrical body 2 is actually placed over the cylindrical member 1. At this time, the rotor 6 is connected to the air cylinder 9
It swings and separates from the cylindrical member 1 due to the rise of the columnar member 1.
After covering the cylindrical member 1 with the cylindrical body 2, the air cylinder 9 is lowered and the lever 12 is released. Cylindrical body 2
Press and hold. The outer periphery of the other end of the cylindrical body 2 is supported by a support member 3, allowing the cylindrical body 2 to rotate smoothly around a horizontal axis.

Next, when the motor 5 is turned on, the cylindrical member 1 rotates, and the cylindrical body 2 and rotor 6 also rotate together with it. As mentioned above, the rotor 6 is connected to the lever 1
The pressing force of the push spring 10 acting on the cylinder member 1 presses the cylinder body 2 on the vertical line passing through the central axis of the cylinder member 1, and as the cylinder member 1 rotates, the cylinder body 2 on the vertical line The electric micrometer 4 moves up and down according to its height, and the amount of movement B is detected by the tip 7 of the electric micrometer 4.

The wall thickness of the cylindrical body 2 is measured by calculating the movement amount B and the movement amount A measured as the zero point. This measured value may be recorded as data, or the value obtained by adding the wall thickness control value data to the movement amount A that previously indicates the zero point may be stored in the computer and compared with the measured movement amount B. An abnormal value may be detected and the display lamp 11 may be turned on.

The cylindrical body applicable to the present invention can be any material as long as it has a pipe or tube shape and is rotatable.
For example, iron pipes, plastic tubes, etc. are not particularly limited.

(Effects of the Invention) The present invention is as described above, and the wall thickness of a cylindrical body can be efficiently, accurately and continuously measured simply by setting the cylindrical body on a cylindrical member, and it can be automated very easily. It has the particularly remarkable effect of being possible.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one example of a preferred apparatus for carrying out the present invention, and FIG. 2 is a perspective view of the main parts thereof. 1... Cylindrical member, 2... Cylindrical body, 4... Micrometer, 6... Rotor.

Claims (1)

[Scope of Claims] 1 A cylindrical member 1 rotatably provided around a horizontal axis; A support member 3 consisting of at least one set of rollers whose axes are parallel to the horizontal axis and are freely rotatable; and a support member 3 which is provided in parallel to the cylindrical member 1 in pressure contact and swingable on a vertical line passing through the central axis of the cylindrical member 1. A micrometer 4 is provided, which measures the amount of movement of the rotor 6 by bringing its tip 7 into contact with the rotor 6 on a vertical line passing through the central axis of the cylindrical member 1. Thickness of a cylindrical body characterized by measuring the wall thickness of the cylindrical body 2 by horizontally rotating the cylindrical body 2 which is pressed by a covered rotor 6 and whose outer periphery at the other end is supported by a support member 3 How to measure.