JP2005007483A - Half-splitting cutter for small diameter pipe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a half-splitting cutter, capable of continuously longitudinally splitting a small diameter pipe having the length of 1 m or larger still in a long shape, without cutting the pipe in a length size and making the length of the pipe mutually the same, eliminating the necessity of cutting a pipe in a short length, before half-splitting. <P>SOLUTION: This cutter for half-spliting a small diameter pipe by sending the pipe in the longitudinal direction. The cutter has a pair of front sending disks for sending the introduced pipe forward, a pair of cutting disks for cutting and longitudinally dividing both sides of the pipe, and a pair of rear sending disks for sending the divided-cut pipe forward in a state of being maintained in a cylindrical shape; and is characterized in that these disks are installed in order in the sending direction of the pipe, and a cutting guide bar having a horizontal guide vane concentrically placed with the pipe to be divided in a half-split shape, is arranged between the pair of cutting disks and the pair of rear sending disks. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
For example, when removing small-diameter pipes (hereinafter referred to as “piping”) such as liquid feeding pipes, electrical cladding pipes, and heat exchange narrow pipes used in nuclear power plants, radioactive substances adhere to the pipes (hereinafter referred to as “ It is necessary to confirm that there is no “contamination”. Since the inner diameter of the small diameter pipe is small, it is difficult to measure the contamination in the pipe as it is with a survey meter or the like.
[0002]
The present invention relates to a half-cut pipe half-cutting machine for facilitating the measurement of contamination during the removal of such pipes.
[0003]
[Prior art]
At the time of pipe removal, a pipe material vertical cutting device using a multistage rotary blade is used as a pipe vertical cutting device (see, for example, Patent Document 1). This is a device that uses a hydraulic cylinder to extrude a pipe material to a cutting part and cuts the pipe in a vertical split with a rotary blade. In this apparatus, pipes of the same diameter that have been cut in advance to a certain length in accordance with the length of the hydraulic cylinder are cut vertically.
[0004]
In addition, there is also a vertical cutting apparatus for pipes or plates in which a band saw is installed on a movable carriage (see, for example, Patent Document 2). Also in this apparatus, it is necessary to cut the pipe material to be cut into a predetermined length in advance.
[0005]
Further, a core metal is inserted into the tube and cut with a circular saw blade (chip saw). By adjusting the size of the metal core, a tube having a small diameter can be cut. However, it cannot be used for piping with a very small diameter. In addition, the length of the tube needs to be cut to a length shorter than that of the core, and in order to completely halve the tube, turn the core 180 ° and turn the groove through the saw blade upside down, It is necessary to reciprocate the circular saw blade once.
[0006]
[Patent Document 1]
Japanese Utility Model Publication No. 4-92718 [Patent Document 2]
Japanese Utility Model Publication No. 1-60820 [Patent Document 3]
Japanese Patent Laid-Open No. 10-309623 [0007]
[Problems to be solved by the invention]
As in the known technology, prior to halving, there is no need to cut the pipe in a short length, and if it is a thin tube having a length of 1 m or more, the length of the pipe can be kept long without being cut. An object of the present invention is to provide a half-cutting machine that can cut in half continuously.
[0008]
[Means for Solving the Problems]
(1) A cutting machine that sends a small-diameter pipe in the longitudinal direction and divides it in half.
The cutting machine is divided and cut into a pair of left and right front feed disks for feeding the introduced pipe forward in the horizontal direction, a pair of left and right cutting disks that cut both sides of the pipe in the longitudinal direction and divide the pipe vertically. A pair of left and right rear feeding discs that feed forward with the piping maintained in a cylindrical shape, and these discs are mounted on the machine frame in order toward the feeding direction of the piping,
Between the pair of cutting disks and the pair of rear feeding disks, a cutting guide rod concentric with the pipe to be divided in half is provided.
(2) The pair of front feed discs and the pair of rear feed discs are horizontally arranged across a pipe to be cut, and each disc has a V-shaped groove in the periphery, and the rear feed discs The disk further has an annular pressing disk that can be inserted into a slit corresponding to the cutting margin of the cutting disk formed on the side of the pipe cut at the center of the V-shaped groove.
(3) The pair of cutting discs is composed of a pair of left and right disc-shaped tip saws arranged at symmetrical positions with respect to the feed direction of the pipe to be cut, and each disc-shaped tip saw has a number of cutting teeth on its circumference. Then, a cutting guide bar arranged concentrically with the pipe to be cut is cut as a core metal.
(4) The cutting guide rod has a tapered guide portion having a conical shape at the tip, and a tapered inclined portion that fits into a slit corresponding to the cutting margin of the cutting disc generated on the side of the pipe by the cutting disc at the center portion. The horizontal guide blades have recesses at positions corresponding to the pair of left and right cutting disks and positions corresponding to the pair of left and right rear feed disks.
(5) A front guide roller and a rear guide roller are provided at the front and rear positions of the pair of left and right cutting disks to prevent lateral displacement of the pipe to be cut.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Based on FIGS. 1-9, embodiment of the half cutting machine of piping is described.
1 is a plan view of a half-cutting machine, FIG. 2 is also a side view, FIG. 3 is a control panel of the cutting machine, FIG. 4 is a plan view of a tip saw as an example of a cutting disk, FIG. FIG. 6 is a left side view of FIG. 5. 7 is an enlarged plan view of the main part of the half cutting machine, FIG. 8 is a side view of the main part, and FIG. 9 is an enlarged detailed view of the cutting guide bar.
[0010]
In FIG. 1, reference numeral 1 denotes a machine frame. A caster 2 is provided at the lower part of the machine frame 1, and can be moved by this. The machine frame 1 is an adjuster 3 which is used after being moved to a predetermined position.
[0011]
A half-cutting machine according to the present invention is provided on the machine frame 1. A front guide roller frame 4 is provided at the front part of the machine frame 1, and a pipe guide roller 5 is provided before and after the frame 4.
[0012]
The pipe P to be cut in half is fed forward along the guide roller 5 and is further fed forward by being sandwiched between a pair of left and right front feed disks 6 placed horizontally. The pair of front feed discs 6 and 6 are rotationally driven by a front feed disc drive motor 7 mounted on the lower part of the machine casing 1.
[0013]
The pipe P sent by the pair of front feed discs 6 and 6 is guided by a pair of left and right guide rollers 8 while preventing lateral displacement, and sent to the next pair of left and right cutting discs 10 and 10, where It is cut off.
[0014]
The pair of front feed disks 6 and 6 have V-shaped grooves on their peripheral surfaces to facilitate feeding of the piping. A manual handle 9 that adjusts the interval according to the diameter of the pipe P is provided, and by rotating the handle 9, the pair of left and right front feed disks 6 and 6 are brought into contact with and separated from each other in the horizontal direction. Adjusted to.
[0015]
For example, a tip saw as shown in FIG. 4 is used for the pair of cutting disks 10 and 10. The pair of cutting discs also have a manual handle 9, whereby the distance between the cutting discs 10, 10 can be adjusted according to the diameter of the pipe P.
[0016]
The pipe P is cut at both sides simultaneously by the pair of cutting discs 10 and 10, and slits corresponding to the cutting allowance of the cutting teeth 11 of the cutting discs 10 and 10 are formed on both sides in the longitudinal direction to form a pair of rear guides. It passes through the roller 12 and is fed onto the rear guide roller frame 18 by the rear feed disks 13 and 13. The pair of rear feed discs 13 and 13 also have V-shaped grooves 14 on the peripheral surface in the same manner as the front feed discs 6 and 6. The interval can be adjusted by the manual handle 9.
[0017]
The pipe P divided in half by the pair of cutting discs 10 and 10 is guided at the center of the pipe by a cutting guide rod 15 concentrically located at the center thereof. The cutting guide rod 15 is held by bolts 21 on the machine frame 1 with mounting portions 20 provided on horizontal guide blades 19 having tapered inclined portions 16 on both sides.
[0018]
The cutting guide rod 15 is concentrically inserted in the center of the pipe P, but has symmetrical front recesses 23 and 23 at positions where the cutting teeth 11 (FIG. 4) of the pair of cutting disks 10 and 10 cut. ing.
[0019]
As shown in FIG. 5, the rear feeding disk 13 is provided with an annular pressing disk 17 at the center of a V-shaped groove provided on the peripheral surface, and both sides of the pipe P in which the pressing disk 17 is cut in half. Accordingly, the pipe P can be prevented from slipping, and the pipe P can be accurately pulled out and sent out toward the rear guide roller frame 18.
[0020]
The cutting guide rod 15 will be further described with reference to FIG.
The cutting guide bar 15 has a blade-like horizontal guide blade 19 at the center thereof. The horizontal guide blades 19 are bent and extended at both side ends downward to form attachment portions 20 to the machine frame 1. The mounting portion 20 is attached to the machine frame with bolts 21.
[0021]
The tip of the cutting guide bar 15 is a cone-shaped tapered tip portion 22, from which the tip of the pipe P is guided and enters. A front recess 23 is provided behind the tapered tip 22 at the tip, and a rear recess 24 is provided symmetrically near the rear end of the cutting guide rod 15.
[0022]
The front recess 23 is located at a position facing the cutting teeth 11 (FIG. 4) of the cutting disk 10, and thereby, when cutting with the cutting teeth 11 of the cutting disk 10 such as a tip saw shown in FIG. Salmon
[0023]
The rear recess 24 of the cutting guide bar 15 is located at a position corresponding to the rear feeding disk 13, thereby avoiding interference with the protrusion of the annular presser disk 17 provided at the center of the rear feeding disk 13.
[0024]
The horizontal guide blade 19 is located behind the front recess 23 and has a tapered inclined portion 16. When the pipe P, which is cut at both sides by the cutting disk 10 and divided into upper and lower parts, is sent to the rear, it can pass through this part smoothly. That is, the horizontal guide vane 19 has a thickness t (FIG. 9B) substantially equal to the slit width formed on both sides of the pipe P cut by the cutting disk 10, and the horizontal guide vane 19 is located on both sides of the pipe. The pipe fits into the slit so that the pipe can pass smoothly without breaking its cross-sectional shape.
[0025]
The chips cut by the pair of cutting discs 10 and falling to the lower part are sucked by the vacuum cleaner 25. Reference numeral 26 denotes an operation panel.
[0026]
(Half cutting of pipes by half cutting machine)
(1) Place the pipe P on the front guide roller frame 4, set it between the front feeding disks 6, 6, and rotate the front feeding disks 6, 6 to move the pipe P toward the cutting disks 10, 10. Send automatically.
(2) The pipe P is stably guided in the vertical and horizontal directions by the front guide rollers 8 and 8 to prevent blurring during transfer. Then, it enters toward the tip end detail 22 of the cutting guide bar 15 immediately before the cutting disks 10 and 10.
(3) The pipe P is cut in half in the longitudinal direction by the cutting disks 10 and 10.
(4) The half-cut pipe P is separated vertically on the front recess 23 of the cutting guide rod 15 and is moved to the rear feeding disks 13 and 13 while being prevented from being shaken horizontally by the rear guide rollers 12 and 12. Sent.
(5) The half-cut pipe P is pulled by the rear feeding disks 13 and 13 and pulled out of the cutting disks 10 and 10.
(6) The pipe P that has been cut in half is fed from the rear feeding disks 13 and 13 onto the rear guide roller frame 18.
(7) Chips generated when the pipe P is cut in half are collected by the vacuum cleaner 25. (8) Driving the front feeding disk drive motor 7, the cutting disk drive motor 27, and the rear feeding disk drive motor 28 The stop is operated with the operation panel 26.
Since the dedicated caster 2 is provided for moving the half-cutting machine, it can be easily moved by hand. When the target pipe P is cut in half, the adjuster 3 fixes the target pipe P to a predetermined work place and starts the work.
[0027]
【The invention's effect】
The pipe P can be continuously fed while being guided by the front feed disks 6 and 6, the rear feed disks 13 and 13, the front guide rollers 8 and 8, the rear guide rollers 12 and 12, the cutting guide rod 15, and the like. As a result, the pipe can be cut in half with the length being long, and there is no need for pre-treatment to keep the length of the pipe constant as in the prior art.
[0028]
In particular, the horizontal guide blade 19 having a tapered inclined portion is provided on the cutting guide rod 15 symmetrically, and the horizontal guide blade 19 enters the slit of the cut pipe P from its tapered tip, so that it is divided vertically. Since the pipe between the upper and lower segments is filled with horizontal guide blades, it can be sent smoothly while maintaining a circular shape.
[0029]
In addition, a presser disk is provided at the center of the V-shaped groove on the peripheral surface of the rear feed disk, and this is bitten into the slit cut by the cutting teeth of the cutting disk. Even if it becomes, it is sent stably without falling apart.
[0030]
These horizontal guide vanes with the tapered tip of the cutting guide rod and the presser disc of the rear feed disc combine to contribute to smooth feeding of the half-divided piping. Can be continuously sent as it is without being cut into short pieces in advance.
[0031]
By replacing the cutting disk (for example, a chip saw) with a material suitable for the material of the pipe P to be cut, it can be easily applied to half cutting of pipes made of brass, soft iron, SUS or the like.
[0032]
As a target small-diameter pipe, for example, a pipe of about 15 A (outside diameter of about 21 mm) to 40 A (outside diameter of about 50 mm) according to JIS standards can be cut in half.
[Brief description of the drawings]
FIG. 1 is an overall plan view of a half-cutting machine for small-diameter piping.
FIG. 2 is a side view of the entire half-cutting machine for small-diameter piping.
FIG. 3 is an operation panel of a half cutting machine.
FIG. 4 is a side view of the tip saw.
FIG. 5 is a side view of a post-feed disc.
6 is a left side view of FIG. 3. FIG.
FIG. 7 is an enlarged plan view of a main part of the half cutting machine.
FIG. 8 is a view on arrow X in FIG. 7;
FIG. 9 is an enlarged detail view of a cutting guide bar.
[Explanation of symbols]
P Target pipe 1 Machine frame 2 Caster 3 Adjuster 4 Front guide roller frame 5 Guide roller 6 Front feed disk 7 Front feed disk drive motor 8 Front guide roller 9 Handle 10 Cutting disk 11 (cutting disk) cutting teeth 12 Rear Guide roller 13 Rear feed disk 14 V-shaped groove 15 Cutting guide rod 16 Tapered inclined portion 17 Pressing disc 18 Rear guide roller frame 19 Horizontal guide blade 20 Mounting portion 21 Bolt 22 Tapered tip 23 Front recess 24 Back recess 25 Vacuum Vacuum cleaner 26 Operation panel 27 Cutting disk drive motor 28 Rear feed disk drive motor

Claims (5)

A cutting machine that sends a small-diameter pipe in the longitudinal direction and divides it in half.
The cutting machine is divided and cut into a pair of left and right front feed disks for feeding the introduced pipe forward in the horizontal direction, a pair of left and right cutting disks that cut both sides of the pipe in the longitudinal direction and divide the pipe vertically. A pair of left and right rear feeding discs that feed forward in a state where the pipe is maintained in a cylindrical shape, and these discs are mounted on the machine frame in order toward the feeding direction of the piping,
A small-diameter pipe half-cutting machine, wherein a cutting guide rod concentric with a pipe to be half-split is provided between the pair of cutting disks and a pair of rear feed disks. The pair of front feed discs and the pair of rear feed discs are horizontally arranged across a pipe to be cut, and each disc has a V-shaped groove in the periphery. 2. A small aperture according to claim 1, further comprising an annular pressing disk that can be inserted into a slit corresponding to a cutting margin of a cutting disk formed on a side portion of a pipe cut in a central portion of the V-shaped groove. Pipe cutting machine. The pair of cutting discs is composed of a pair of left and right disc-shaped tip saws arranged at symmetrical positions with respect to the feed direction of the pipe to be cut, each disc-shaped tip saw having a large number of incisors on its circumference, and cutting 2. A half-cut pipe half-cutting machine according to claim 1, wherein a cutting guide rod arranged concentrically with the pipe to be cut is cut as a core bar. The cutting guide bar has a tapered guide portion having a conical shape at the tip, and a horizontal guide having a tapered inclined portion that fits into a slit corresponding to a cutting margin of a cutting disc generated on a side portion of a pipe by a cutting disc at a central portion. 2. A small aperture according to claim 1, wherein the blade has a recess at a position corresponding to the pair of left and right cutting disks and a position corresponding to the pair of left and right rear feeding disks. Pipe cutting machine. 2. The small-diameter pipe half-cutting machine according to claim 1, further comprising a front guide roller and a rear guide roller for preventing lateral displacement of the pipe to be cut at front and rear positions of the pair of left and right cutting disks.

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