JPH0818175B2 - Pipe cutting equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a pipe cutting device, and more particularly to technical means for improving productivity.

(Prior Art) FIG. 8 shows a conventional long pipe cutting device. In the figure, reference numeral 100 denotes a pipe stopper, which is positioned by abutting one end surface of the pipe 114. The pipe stopper 100 is connected to the cylinder 102, and is moved by the cylinder 102 under the guidance of the guide rail 104 and the fitting portion 106, and the pipe 114
Change the positioning position for.

Reference numeral 108 denotes a positioning tool for the pipe stopper 100, and the pipe stopper 100 is brought into contact with the positioning tool 108 to determine the position.

110 is a mandrel for receiving a force when the pipe 114 is cut by the cutter 112, and is rotatably held by a holding body 113. The mandrel holder 113 is connected to the cylinder 115, and is connected to the guide rail 116 and the fitting portion 118.
It is adapted to be moved back and forth by a cylinder 115 under the guidance of.

In this device, the mandrel 110 is advanced by the cylinder 115 to project forward from the through hole 120 of the pipe stopper 100, and the pipe 114 is fitted into the mandrel 110 and rotated, and is cut at a predetermined position by the cutter 112. Thus, a short tube in which one end surface of the pipe 114 is cut into a predetermined length can be obtained.

(Problems to be solved by the invention) However, in this device, the cutting length of the pipe 114,
That is, setup work such as replacing the positioning tool 108 is required each time the cutting position changes, and in addition, setup work for replacing the mandrel each time the thickness of the pipe changes is required in this device, and these are produced. It was a hindrance to improving the sex.

(Means for Solving the Problem) The device of the present invention was devised to solve such a problem, and its gist is (a) a cylindrical main body fixed to a base, A stopper device having an inner ring rotatably held inside the tubular main body, which has an annular stopper surface having a through hole in the axial center and extending in the radial direction at one axial end, A mandrel portion is integrally provided on one end side in the axial direction, and a rotary shaft is integrally provided on the other end side, and the mandrel portion is provided between a position protruding from the stopper surface to the one end side in the axial direction and a position retracted to the other end side in the axial direction. In the through hole inside the inner ring,
A mandrel that is coaxially movably inserted and extends straight from the one end to the other end; and (c) a mandrel holder that rotatably holds the rotating shaft of the mandrel.
(D) Mandrel holder moving means for moving the mandrel holder in the axial direction and stopping the mandrel portion at a position protruding from the stopper surface and a position retracting the mandrel, (e) a disk-shaped cutter blade, and A pipe having a cutter shaft fixed to the cutter blade, fitted into the mandrel portion, and having its tip abutted against the stopper surface,
A cutter that cuts the tip to a predetermined length, and (f) a cutter holder that rotatably holds the cutter shaft,
(G) a first cutter holder moving means for moving the cutter holder together with the cutter in the axial direction of the pipe; and (h) cutter stopper means for defining a moving end of the cutter in the axial direction. ) A second cutter holding body moving means for moving the cutter holding body in the direction perpendicular to the axis between a position where the cutter blade is pressed against the mandrel portion in the direction perpendicular to the axis and a position separated therefrom. Be prepared.

(Operation and Effect of the Invention) As described above, in the apparatus of the present invention, the cutter is moved in the axial direction of the pipe by the first cutter holding member moving means, thereby changing the cutting position with respect to the pipe in the axial direction. The length of cut pipe is changed.

According to the device of the present invention, when the cutting length of the pipe is changed, it is not necessary to replace the jig for determining the position of the pipe stopper as in the conventional device, and the first cutter holder moving means is simply used. The axial position of the cutter may be changed by.

That is, in the present invention, the first cutter holder moving means moves the cutter holder together with the cutter in the axial direction, and the cutter stopper means defines the axial position of the cutter, whereby the cutter cuts the pipe in the axial direction. Determine the position, that is, the cutting length of the pipe. Therefore, according to the present invention, a special jig for positioning is not required, which can save the time and labor required for the setup change, which has been conventionally required, and greatly improve the productivity.

In the device of the present invention, the mandrel portion is formed separately from the stopper surface of the stopper device that is fixedly arranged, and the mandrel portion is formed inside the inner ring of the stopper device that defines the tip position of the pipe. Since it is provided so as to be movable in the axial direction within the through hole,
By abutting the tip of the pipe to the stopper surface of the reference inner ring, the pipe can be cut into a predetermined length, and after cutting the pipe, the mandrel portion is retracted to the retracted position.
The short tube obtained by cutting the pipe can be directly removed in the direction perpendicular to the axis.

In addition, since the stopper surface that comes into contact with the tip surface of the pipe is rotatable, when the tip of the rotationally driven pipe comes into contact with the stopper surface, frictional resistance is generated between the tip surface of the pipe and the stopper surface. Since it does not occur, the pipe can be rotated smoothly and the pipe can be cut accurately.

Further, according to claim 2, since a plurality of types of mandrels are provided at intervals in the circumferential direction with respect to the rotary table, by using a mandrel having a mandrel portion having a required thickness, the diameters are different. It is possible to deal with pipes, it is possible to omit the setup work for replacing the mandrel, and it is possible to further improve the efficiency of pipe cutting.

In the device of claim 3, the cutter stopper means is
The cutter holder is provided with a positioning restraint portion and an advancing / retreating drive means for driving the cutter holder forward and backward in the axial direction. When the pipe is cut by the cutter, the positioning restraint portion releases the positioning restraint action on the cutter holder. Since it can be driven in the direction, when the pipe is cut by the cutter, the cutter can be released axially by a distance corresponding to the thickness of the cutter blade, which allows the pipe to be cut accurately and smoothly. .

(Example) Next, an example of the present invention will be described in detail with reference to the drawings.

In FIGS. 1 and 2, 10 is a rotary table, the rotary shaft 12 of which is rotationally driven by a motor 16 via a speed reducer 14.

On the rotary table 10, a plurality of stopper devices 18 (here, six) are fixedly installed at predetermined intervals along the outer peripheral edge. As shown in FIG. 5, these stopper devices 18 are provided with a cylindrical main body 20 fixed to the outer peripheral edge of the rotary table 10 and an inner ring 22 rotatably held inside the main body 20. , The inner ring 22 has a through hole 24 in the axial center,
A mandrel 26 is projected forward (outward in the radial direction) from the through hole 24. In this stopper device 18, the inner ring 22 has a pipe on one axial end surface (stopper surface).
The pipe 28 rotates together with the pipe 28 with one end surface of the pipe 28 abutting against each other.

As shown in FIG. 3, a plurality of mandrel holders 30 are arranged on the rotary table 10 at positions corresponding to the stopper devices 18, and the mandrel holders 30 have different outer diameters of the mandrel portions 26a. Multiple mandrels 26
Is rotatably held by a rotary shaft 26b as clearly shown in FIG.

These holding bodies 30 are provided with downward fitting portions 34, which are fitted to guide rails 36 radially provided on the rotary table 10 to move and guide the mandrel holding bodies 30 in the radial direction. It is like this.

From each mandrel holder 30, a drive piece 38 extends downward through a radial elongated hole 35 (see FIGS. 3 and 4) provided in the rotary table 10 and its lower end. A pair of rollers 40 are fixedly installed in the. These rollers 40
As shown in FIG. 2, a cylindrical guide rail 44 fixedly mounted on the base 42 is sandwiched from both inside and outside,
When the rotary table 10 rotates, the mandrel holders 30 are rotationally guided while being positioned in the radial direction. Here, the cylindrical guide rail 44 is divided into a main body 46 and a movable portion 48 as shown in FIG. 4, and the movable portion 48 is radially moved by a cylinder 49 as a mandrel holder moving means. You can move it back and forth.

As shown in FIGS. 1 and 6, an elevating body 50 is disposed on the side of the rotary table 10, and as shown in FIG. 7, the elevating body 50 is guided by a guide rail 52. It is adapted to be moved up and down by a cylinder 54 as a second cutter holder moving means. A cutter holder 56 is provided on the elevating body 50, and the holder 58 rotatably holds a cutter 58 having a disk-shaped cutter blade 58a and a cutter shaft 58b fixedly mounted on the cutter blade 58a.

A cylinder 57 as a first cutter holder moving means is connected to the cutter holder 56, and the holder 56 is guided under the guide of the guide rail 60 in the horizontal direction in FIG.
It can be moved in the axial direction of.

The guide rail 60 is fitted with a stopper 62 as a positioning restraint portion in the cutter stopper means. A tip portion of the stopper 62 is bent to form an abutting portion 64, and the abutting portion 64 abuts the cutter holding body 56 to define a moving end thereof.

In FIGS. 1, 6, and 7, 66 is a motor, which is connected to the screw 70 via a belt 68. The screw 70 is screwed into the stopper 62, and moves the stopper 62 forward and backward based on its rotation. In this example, the motor 66, the belt 68, and the screw 70 constitute an advance / retreat driving means for axially advancing / retreating the stopper 62 as a positioning restraint portion. Screw 70
The rotation amount of is detected by the detector 72, and the movement amount of the stopper 62 is automatically controlled.

 Next, the operation of this device will be described.

First, according to the cutting length from the tip of the pipe 28, a cutter
Determine the axial position of 58. The axial position of the cutter 58 is adjusted as follows. That is, in FIG. 6, the stopper 62 is advanced to the right in advance to a certain position, and then the cutter holder 56 is advanced by the cylinder 57 to the position where it abuts against the abutting portion 64 of the stopper 62. Since the position of the cutter 58 is determined by the position of the stopper contact portion 64, the position of the stopper 62 is determined so that the cutter 58 will come to a predetermined position.

Now, the rotary table 10 is rotated in a state where the position of the cutter 58 is determined, and the plurality of types of mandrels 26 on the table 10 are integrally rotated together with their holding bodies 30. Then, when the mandrel 26 corresponding to the thickness of the pipe 28 to be cut reaches the cutting station of the pipe 28, the rotation of the table 10 is stopped. At this time, the lower end roller 40 of the driving piece 38 extending downward from the holding body 30 of the mandrel 26 reaching the cutting station is the cylindrical guide rail 44.
When the movable part 48 is moved forward by the cylinder 49, the holder 30 of the movable part 48 is sandwiched between the table 10 and the movable part 48.
The mandrel 26 held by being guided by the upper guide rail 36 is moved forward so that the held mandrel 26 is projected forward from the center through hole 24 of the stopper device 18 fixedly mounted on the table 10. Here, the required mandrel 26 is selected and set, and the end of the pipe 28 is fitted into the mandrel 26, and the pipe 28 is rotationally driven by a driving device (not shown). When the cutter 58 is lowered together with the lifting / lowering body 50 in this state, the cutter 58 is pressed against the outer peripheral surface of the pipe 28 to cut the pipe 28. At that time, as the cutter 58 bites into the pipe 28, the thickness of the blade of the cutter 58 is equal to the thickness of the cutter 58.
Need to be released in the axial direction. This apparatus does this as follows. That is, when the blade of the cutter 58 starts to bite into the pipe 28, the stopper 62 is advanced by rotating the screw 70 to free the cutter holder 56 and the cutter 58. At the same time, the cylinder 57 for moving the cutter is made free. If you do this, the cutter 58 will
It is possible to freely escape in the axial direction by a distance corresponding to the thickness according to the biting into the pipe, the pipe 28 can be smoothly cut, and a short pipe of a predetermined length can be obtained from the tip of the pipe. You can

Now, when the cutter 58 cuts the pipe 28,
By raising 50 and retracting the mandrel portion 26a, the cut portion (short tube) of the pipe 28 can be automatically removed outward in the radial direction, and the same operation as described above is performed again to cut the pipe one after another. A short pipe having a predetermined length can be obtained by cutting from the tip of the pipe.

On the other hand, when the thickness of the pipe 28 to be cut changes, the device changes the mandrel 26 as follows. First, the mandrel holder 30 and the mandrel 26 are moved by the cylinder 49.
Is retreated. At this time, the movable portion 48 of the guide rail 44 is retracted, and is connected to the main body 46 at the retracted end. Then, the rotary table 10 is rotated to rotate and move the plurality of mandrels 26 together with the holding body 30, and the mandrel 26 desired.
When it reaches the cutting station, the mandrel 26 is projected from the through hole 24 of the stopper device 18 based on the same operation as above. After that, the same movement as described above
Make 28 cuts.

As described above, according to the apparatus of this example, even if the cutting length of the pipe 28 and the thickness of the pipe 28 are changed, it is possible to deal with the jig party without exchanging work or setup work. be able to. This greatly improves the production efficiency.
By the way, it takes about one hour for each set-up change work, but this work saves the work time.

Further, the apparatus can be fully automated, and labor saving can be achieved.

Although the embodiments of the present invention have been described in detail above, the present invention can be configured in a form in which various changes are made based on the knowledge of those skilled in the art without departing from the spirit of the present invention.

[Brief description of drawings]

FIG. 1 is a front view of a pipe cutting device according to an embodiment of the present invention, FIG. 2 is a rotary table of the same pipe cutting device and a front sectional view of a main part of a peripheral portion, and FIG. 3 is a rotary table of the same cutting device. FIG. 4 is a plan view of the mandrel pushing cylinder and the peripheral portion of the same cutting device, FIG. 5 is a front sectional view of the mandrel, the holder and the peripheral portion, FIG. 6 and FIG. FIG. 8 is a front view and a side view of a mechanism for moving the cutters of the same cutting device, and FIG. 8 is a schematic configuration explanatory view of a conventional cutting device. 10: Rotary table, 16, 66: Motor 18: Stopper device, 24: Through hole 26: Mandrel, 26a: Mandrel part 26b: Rotating shaft, 28: Pipe 30: Mandrel holder 49, 54, 57: Cylinder 56: Cutter Holder 58: Cutter, 58a: Cutter axis 58b: Cutter blade, 62: Stopper 68: Belt, 70: Screw

Claims (3)

[Claims] (A) A tubular main body fixed to a base, a through hole formed in the center of the shaft, and an annular stopper surface extending in the radial direction at one axial end of the tubular main body. A stopper device having an inner ring rotatably held inside, and (b) a mandrel portion is integrally provided on one end side in the axial direction, and a rotating shaft is provided on the other end side, and the mandrel portion extends from the stopper surface to a shaft. A mandrel extending straight from the one end to the other end, which is coaxially movably inserted into the through hole on the inner side of the inner ring between a position protruding toward one end in the direction and a position retracting toward the other end in the axial direction; (C) a mandrel holder that rotatably holds the rotating shaft of the mandrel, and (d) the mandrel holder is moved in the axial direction, and the mandrel portion is stopped at a position projecting from the stopper surface and a position retracting. Mand Pipe having a disc-shaped cutter blade and a cutter shaft fixedly attached to the cutter blade, the pipe being fitted into the mandrel portion and having its tip abutted against the stopper surface. A cutter for cutting the tip from the tip to a predetermined length; (f) a cutter holder for rotatably holding the cutter shaft; and (g) moving the cutter holder together with the cutter in the axial direction of the pipe. A first cutter holding member moving means, (h) a cutter stopper means for defining an axial moving end of the cutter, and (i) a position at which the cutter blade is pressed against the mandrel portion in a direction perpendicular to the axis. A second cutter holding member moving means for moving the cutter holding member in a direction perpendicular to the axis between the position and a position apart from this. 2. The mandrel according to claim 1, wherein the base is a rotary table, and a plurality of types of mandrels having different thicknesses of the mandrel and a corresponding number of mandrel holders are provided on the rotary table. A pipe cutting device, wherein the pipe cutting device is provided at intervals in the circumferential direction. 3. The cutter stopper means according to claim 1 or 2, further comprising: a positioning restraint portion with respect to the cutter holder, and an advancing / retreating drive means for driving the positioning restraint portion in an axial direction. A pipe cutting device, wherein the position-restriction driving unit is movable in a direction in which the position-restriction restraining action on the cutter holder is released when the pipe is cut by the cutter blade by the advancing / retreating drive means.