JPH10309623A - Pipe half cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily cut a CR pipe of a sample into halves. SOLUTION: This pipe half cutting device is provided with a core bar 10 to be inserted in a pipe P and for supporting the pipe P, guides 20 to be brought in contact with the outer side surface in relation to the pipe P supported by the core bar 10 and for pinching and fixing the pipe P in collaboration with the core bar 10, and a cutting machine 30 so supported as to be moved in the longitudinal direction of the pipe P fixed by the core bar 10 and the guides 20, the pipe P is fixed by being pinched from the inside and the outside, and the side surface is cut.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tube half-cutting device for cutting a CR tube in half for quality inspection.

[0002]

2. Description of the Related Art Cold reduction mills (Cold Reduce)
The tube rolled under r) is generally called a CR tube. For this CR tube, a part of the CR tube was sampled for each lot and inspected to see if there were any scratches or cracks on the inner surface of the tube after rolling. Then, the inner surface is visually inspected.

[0003] By the way, there is no special device for cutting the CR tube of this sample, and the CR tube is clamped from both sides with a vise and fixed by an operator using a hand saw. The work of cutting was usually performed.

[0004]

When the CR tube of the sample is cut as described above, the CR tube is clamped from both sides with a vise and fixed. The cut end faces of the cut portions receive a force in a direction in which the cut end faces approach each other due to a vice gripping force. For this reason, the saw blade of the hand saw may be stuck between the cutting end faces and may not move or bend, thereby causing a problem that the cutting operation cannot be performed smoothly. In addition, since the worker performs cutting while holding the pipe or a hand saw that is not supported by a vise in his hand, the workability is poor, such as having to operate the hand saw in a very unstable posture. was there.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tube half-cutting device that can easily cut a sample CR tube into a half-split state.

[0006]

As means for solving the above-mentioned problems, as a means for supporting a pipe inserted into the inside of a pipe, a rod supported by the rod is in contact with the outer surface of the pipe. , A pipe comprising a guide for sandwiching and fixing the pipe between the rod-shaped body and a cutting machine which is movably supported in the longitudinal direction of the pipe fixed by the rod-shaped body and the guide and cuts the side surface of the pipe. Use a half-cutting device. In this pipe half-slicing apparatus, the pipe is sandwiched from the inside and outside by a rod-like body passed through the inside of the pipe and a guide in contact with the outside face of the pipe, and then, one side of the pipe is first fixed. Is cut in the length direction by a cutting machine, and thereafter, the pipe is rotated by 180 ° while passing through the rod-like body, and the remaining one side is cut in the same manner to cut the pipe in half.

In this pipe half-slicing apparatus, a rod is pivotally supported at one end thereof and is swingable. The pipe is brought into contact with a guide by swinging in one direction with the pipe passing through the rod. And fix it.

Further, the guide is provided with a pair of contact portions which are separated from each other substantially in parallel, and the pair of contact portions contact the outer surface of the pipe supported by the rod-like body along the longitudinal direction thereof. Cuts the tube located between the pair of abutting portions.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a pipe half cutting apparatus according to the present invention will be described with reference to FIGS. The pipe half-split cutting device shown in FIG. 1 is an apparatus for half-cutting a CR raw tube in a diametrical direction of a cross section thereof for quality inspection. This pipe half-cutting device uses a tube (CR tube)
A metal core (rod-shaped body) 10 inserted into the inside of P and supporting the pipe P, and a pipe P supported by the metal core 10 abuts on an outer surface of the pipe P, and a pipe is formed between the metal core 10 and the pipe P. A guide 20 for holding the P in between, and supported movably in the longitudinal direction of the tube P fixed by the cored bar 10 and the guide 20,
And a cutting machine 30 for cutting one side surface of the pipe P.

The metal core 10 has a rod-like shape having a circular cross section substantially matching the internal shape of the pipe P, and is disposed between the side plates 2 and 3 erected and fixed in parallel on the base 1 so as to be separated from each other. One end 11 is pivotally supported by a turning shaft 4 provided between the side plates 2 and 3. The other end 12 of the metal core 10 is supported by a metal core support rod 5 erected on a base.
Are positioned substantially horizontally, but the cored bar 5 can be moved to the side, and by moving it, the holding of the cored bar 10 is released and the cored bar 5 is swung about the pivot 4. It becomes possible.

The guides 20 are provided on the side plates 2 and 3, respectively. The guides 20 are disposed so as to protrude from the side plates 2 and 3 toward the upper side of the fiber core 10, and have a pair of edges separated in parallel. The contact portions 21 and 22 are formed, and the pair of contact portions 21 and 22 extend along the length direction of the pipe P supported by the core bar 10 when the core bar 10 is positioned horizontally. It comes into contact with the outer surface.

The cutting machine 30 has a structure for cutting by rotating a circular saw blade 31. Rails provided along the upper edges of the side plates 2, 3 formed horizontally like the metal core 10. It is possible to reciprocate on 6 and 7. The saw blade 31 employs a tip saw having a carbide tip, and is disposed so as to protrude from the space between the rails 6 and 7 toward the lower metal core 10, and moves the cutting machine 30 on the rails 6 and 7. By doing so, the cutting proceeds along the cored bar 10. The saw blade 31 moves between the pair of abutting portions 21 and 22 of the guide 20 as the cutting machine 30 moves, and the cutting machine 30 is located at any position on the rails 6 and 7. Sometimes there is no significant exposure to the outside. In addition, a concave groove 13 is provided at an upper portion of the metal core 10 along the length direction of the metal core 10 to avoid the rotating saw blade 31.

An operation process for cutting the pipe P by using the pipe half-severing cutting device configured as described above will be described with reference to FIG. First, as shown in FIG. 2A, the cored bar 5 is moved to the side to make the cored bar 10 swingable.
After the core 2 is inclined obliquely downward, the pipe P is attached to the core 10 in such a manner that the other end 12 of the core 10 is inserted into the pipe P to be cut. Thereafter, when the other end 12 is lifted and the core 10 is positioned horizontally, the pair of abutting portions 21 and 22 abut on the outer surface on one side of the tube P facing upward, and the tube P is moved inward by the core 10. From a pair of contact portions 2
Since it is clamped and fixed from the outside by 1, 22,
In order to maintain this state, the cored bar 5 is returned to the original position, and the cored bar 10 is held in a horizontal state as shown in FIG. When the cutting machine 30 is moved along the rails 6 and 7 while operating the cutting machine 30 and rotating the saw blade 31, the saw blade 31 moves the pair of abutting portions 21 and 22 between the core metal 10 and the core metal 10.
In the length direction, and the mandrel 10 and the pair of contact portions 21 and 2
One side of the tube P supported between the two is cut off. After cutting one side surface, the metal core supporting rod 5 is moved to the side to remove the metal core 1.
0 is set in a swingable state, and the tube P, which still retains a tubular shape, is rotated by 180 ° around the cored bar 10, and the tube P is again sandwiched from the inside and the outside with one side surface having been cut facing downward. It is fixed and the cored bar 10 is kept horizontal. Then, when the side surface of the pipe P is cut in the same manner as above, the pipe P is cut into a half-split state.

As described above, in this pipe half cutting device, one end of the metal core 10 is pivotally supported so as to be swingable.
The core P is swung in a state where the pipe P is passed through, and the pipe P is sandwiched from the inside and the outside by being brought into contact with the pair of abutting portions 21 and 22 on the outer side surface facing upward of the pipe P. Unlike the conventional case where the outside of the pipe P is sandwiched by a vise, the cut end faces do not come close to each other. Then, in the process of operating the cutting machine 30 to advance the cutting, there is no problem that the saw blade 31 is stuck between the cutting end faces and does not move or bend, so that the cutting operation can proceed smoothly.

The pair of contact portions 21 and 22 are
Along the length direction of the pipe P supported by
Since the cutting machine 30 cuts the side surface of the pipe P located between the pair of contact portions 21 and 22, the pipe P can be fixed in a stable state. A guide 20 including a pair of abutting portions 21 and 22 is provided on both sides of the range in which the saw blade 31 moves.
Is arranged, the saw blade 31 is not greatly exposed to the outside, and an accident during work can be prevented beforehand.

The cutting machine 30 is supported on the rails 6 and 7 so as to be able to reciprocate, and the operator only has to operate the cutting machine 30 and carry out pushing forward. Workability can be greatly improved.

In the pipe half-cutting apparatus shown in the present embodiment, it is impossible to change the size of the metal core 10, so that a pipe smaller than the diameter of the metal core 10 cannot be cut. However, the core bar 10 may be exchangeable so that tubes of various sizes can be cut. The core metal 10
Is not limited to a circular shape, and may be, for example, a semicircular shape or a rod shape having a circular portion in part. Further, although this tube half-slicing apparatus is used for half-splitting a sample of a CR tube, it does not matter whether a similar tube is cut.

[0018]

As described above, according to the pipe half-slicing apparatus according to the first aspect, the rod-shaped body passed through the inside of the pipe and the outer surface of the pipe supported by the rod-shaped body are provided. Since the pipe is sandwiched from inside and outside with the guide that touches, it is fixed, so that the cutting end faces do not come close to each other unlike the conventional case where the outside of the pipe is sandwiched with a vise, so the saw blade cuts Since there is no inconvenience such as being stuck between the end faces and being unable to move or being bent, the cutting operation can proceed smoothly.

According to the pipe half cutting device of the present invention, one end of the rod is pivotally supported so as to be swingable, and the rod is swung in one direction while passing through the pipe. By moving the pipe, the pipe is brought into contact with the guide and fixed, so that a structure in which the pipe is sandwiched and fixed from inside and outside can be easily realized.

According to a third aspect of the present invention, the guide includes a pair of contact portions which are separated from each other in a substantially parallel manner, and the pair of contact portions are supported by a rod. Since the cutting machine cuts the tube located between the pair of abutting portions along the length direction of the tube, the cutting machine can stably fix the tube. Further, since a guide including a pair of abutting portions is provided on both sides of a range in which the saw blade of the cutting machine moves, the saw blade is not largely exposed to the outside, and an accident during work can be prevented. it can.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a pipe half cutting device according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

[Explanation of symbols]

 P tube (CR tube) 4 Revolving shaft 10 Core (rod) 20 Guide 21, 22 A pair of abutting parts 30 Cutting machine

Claims (3)

[Claims] 1. A pipe half-cutting device for cutting a pipe into half in a cross-sectional diametric direction, comprising: a rod inserted into the inside of the pipe to support the pipe; A guide that is in contact with the outer surface of the supported pipe and fixes the pipe between the rods, and is supported so as to be movable in the longitudinal direction of the pipe fixed by the rods and the guide, A cutting machine for cutting a side surface of a pipe. 2. The pipe half-cutting device according to claim 1, wherein one end of the rod is pivotally supported and is swingable, and the rod is swung in one direction while passing the pipe through the rod. A pipe half cutting device, wherein a pipe is fixed in contact with said guide when moved. 3. The pipe half-cutting device according to claim 1, wherein the guide includes a pair of abutting portions that are separated from each other substantially in parallel, and the pair of abutting portions are supported by the rod-shaped body. The cutting machine is movably supported to cut the side surface of the tube located between the pair of abutting portions, in contact with the outer surface of the tube along the length direction of the tube. Split cutting device.