JPH06339858A - Outside diameter measuring method for flap wheel - Google Patents

Abstract

PURPOSE:To provide an outside diameter measuring method for a flap wheel used to remove a burr caused when a screw is cut on the end part outside of a bar shape body such as a steel pipe or a round bar. CONSTITUTION:A flap wheel before a burr is removed is installed on a rotary device 2 arranged off-line, and is rotated by a rotary motor 3 in the number of revolutions at actual operation time of the on-line flap wheel 1, and an electric micrometer 4 is moved, and is brought into contact with the rotating flap wheel 1, and an outside diameter at rotating time of the flap wheel 1 is calculated by a length from a reference position 5 at the contact time. In this case, a contact moment is judged by means of visual observation of a spark A, or a change in an electric current value of the rotary motor of the flap wheel is judged from an ammeter 6. Thereby, adjustment of initial setting of the on-line flap wheel becomes unnecessary, and a defective product is not generated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring the outer diameter of a flap wheel used for deburring, which occurs when a rod-shaped body such as a steel pipe or a round bar is threaded on the outer side of its end.

[0002]

2. Description of the Related Art On the outside of the ends of rod-shaped bodies such as steel pipes and round rods,
Threading is often done. As an example, a case where a thread is cut on the outer end of the steel pipe will be described. Here, steel pipes are conveyed in the direction perpendicular to the longitudinal direction by the transfer rolls, fixed at the position where the thread cutting device is arranged, multiple steel pipes are threaded by the thread cutting device at the same time, and then those steel pipes are moved by the transfer rolls. Then, the steel pipe is fixed at the position where the deburring device to which the flap wheel is attached is installed, and the burr generated in the thread cutting step is brought into rotational contact with the burr to remove the burr. The flap wheel gradually wears as you use it, so after using it for a certain time (for example, 500)
Then, it is discarded as a consumable item.

However, at the so-called early stage when the flap wheel was replaced and a new flap wheel was used,
There are the following problems. That is, as shown in FIG. 2, generally, in the flap wheel 1, a large number of blade-shaped polishing cloths 1a are radially arranged, and a large number of these polishing cloths 1a are fixed by a ring 1b with an adhesive near the center of rotation thereof. It's a wheel. Therefore, at the number of revolutions in the operating range, the outer diameter increases due to centrifugal force, and depending on the number of revolutions,
The rate of increase is also different.

Therefore, even if a new flap wheel is set, contacted at a predetermined rotation speed, and polished for a predetermined time,
At the initial stage, the outer diameter of the flap wheel and the threaded burr occurrence part of the steel pipe were not sufficiently contacted,
Or it becomes too much and the burr cannot be removed accurately. Therefore, some steel pipes may be defective in the initial stage.

As a measure against the above, after using a new flap wheel, the operator confirms the polishing state of the burr, and if the burr is not properly removed, the setting of the flap wheel is adjusted. And then
The polishing was repeated.

[0006]

However, since the outer diameters of the flap wheels are different from each other, it is difficult to perform initial setting, and accurate contact polishing cannot be performed. Therefore, there is a problem that it takes more time than necessary for the initial setting of the flap wheel.

The present invention is intended to solve the above problems, and provides a method capable of measuring the outer diameter of a flap wheel at a predetermined rotation speed in a simple and reliable manner in advance. The purpose is.

[0008]

In order to achieve the above object, the present invention attaches a flap wheel before deburring to a rotary device provided offline, and rotates it at the number of rotations at the time of deburring online. A method for measuring the outer diameter of a flap wheel, which is characterized in that a length measuring tool moved from a reference position is contacted, and the outer diameter when the flap wheel is rotated is calculated from the length from the reference position at the time of contact. It is a thing.

In this case, a spark is visually determined when the contact is made,
Alternatively, it is preferable to determine from the change in the current value of the rotation motor of the flap wheel and to calculate the outer diameter of the flap wheel during rotation from the length from the reference position at that time.

[0010]

According to the present invention, as described above, the flap wheel is rotated offline at the number of rotations at the time of deburring online, and the length measuring tool moved from the reference position is brought into contact with it. The outer diameter when the flap wheel is rotating is calculated from the length from the reference position, and the calculated value can be input online to the control mechanism of the deburring device with the flap wheel attached, so that it can be used during actual operation. No need to adjust the flap wheel setting.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the present invention. In FIG. 1, 1 is a flap wheel, 2 is a rotation device, 3 is a rotation motor, 4 is an electric micrometer, and 5 is a reference position.

In the method of the present invention, the flap wheel 1 before deburring is attached to the rotary device 2 provided offline.
The flap motor 1 is rotated by the rotary motor 3 at the number of revolutions during the actual operation, and the length measuring tool 4 is moved to make contact with the rotating flap wheel 1 and the reference position 5 at the time of contact. The outer diameter of the flap wheel 1 at the time of rotation is calculated from the length. 9 is a mount.

In this case, the moment of contact is visually determined by the spark A, or the change in the current value of the rotary motor of the flap wheel is determined by the ammeter 6, and the length from the reference position 5 at the time of contact is determined. The outer diameter of the flap wheel 1 during rotation is calculated. That is, when the flap wheel 1 is attached to the rotating device 2, the length between the axis B and the reference position 5 is measured as a constant value in advance, and the length measuring tool comes into contact with the rotating flap wheel 1. The outer diameter of the flap wheel 1 is calculated by subtracting the measured value from the instantaneous reference position 5 and then the outer diameter of the flap wheel 1 is calculated.

Any length measuring tool may be used as long as the length from the reference position 5 at the time of contact can be accurately measured.
Here, the electric micrometer 4 is attached to the gauge mounting base 9, and the movement of the gauge mounting base 9 on which the electric micrometer 4 is mounted is made by a cam mechanism. The linear displacement of the probe 4a of the electric micrometer 4 is converted into an electric quantity, and the outer diameter of the flap wheel 1 based on the displacement is displayed on the display. Here, the spark A generated at the moment when the contact point 4a of the electric micrometer 1 comes into contact with the rotating flap wheel 1 is judged, or the change in the current value of the ammeter 6 is judged, and the operator is judged at that moment. Flap wheel 1
Record the outer diameter data. In general, the switch is pressed so that the outer diameter value at that moment remains on the indicator 8.

The probe of the length measuring tool is a flap wheel 1.
Tungsten that does not wear as much as possible even if it comes close to
Carbide such as carbide can be used. The shape is not limited to a plate shape, and may be a rod-shaped body.

According to the method of the present invention, a steel pipe having a diameter of 60 to 340 mm is externally threaded, and burrs generated at the time of the thread cutting are deburred by using a deburring device using the flap wheel 1. In this case, the flap wheel rotation speed is in the range of 2000 to 4000 rpm, the rotation speed of the flap wheel 1 is exchanged at a constant rotation speed, and 6 deburring devices are used. When performed, the outer diameter value of the flap wheel 1 measured using the method of the present invention is input to the control mechanism of the online deburring apparatus, and when deburring is performed using the corresponding flap wheel 1, With the method of the present invention, there was no generation of defective materials, which had been generated in the initial stage of the flap wheel 1 at about 80 lines / day. Therefore, it becomes unnecessary to perform repeated setting adjustment in the initial stage of the flap wheel 1 which is conventionally required.

The above has described the case of deburring that occurs when threading a steel pipe, but it is applicable not only to steel pipes but also to rod-shaped bodies such as round bars, and to deburring that occurs during forging. Of course.

[0018]

According to the present invention, the initial setting adjustment after the replacement of the flap wheel is unnecessary, no defective products are generated, and the deburring operation by the flap wheel can be smoothly performed.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of an apparatus used in the present invention.

FIG. 2 is a diagram showing an embodiment of a flap wheel used in the present invention.

[Explanation of symbols]

 1 Flap Wheel 2 Rotating Device 3 Rotating Motor 4 Electric Micrometer 4a Stylus 5 Reference Position 6 Ammeter 7 Gauge Mount 8 Indicator 9 Frame A Spark B Shaft Core

Claims (1)

[Claims] 1. A flap wheel before deburring is attached to a rotary device provided offline, rotated at the number of rotations at the time of deburring online, and a length measuring tool moved from a reference position is brought into contact with it. A method for measuring an outer diameter of a flap wheel, which comprises calculating an outer diameter of the flap wheel during rotation from a length from a reference position at the time of contact.