JP2606017Y2 - Pipe cutting equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe cutting device.

[0002]

2. Description of the Related Art In a conventional pipe cutting apparatus, one of front and rear portions of a pipe to be cut is held in a clamped manner by an upper clamp, and the pipe is cut by a band saw. Was.

[0003] At this time, since the clamp holds only one of the front and rear portions of the pipe at the cutting position, there is a problem that the pipe is bent by its own weight immediately after cutting, and burrs are generated on the cut end surface.

[0004] Further, in the case of a flat clamp, since there are few points of contact with the pipe, stress concentration may occur in the pipe and the pipe may be deformed. Further, it is difficult to set a pipe with a flat clamp, and it is necessary to shift a band saw, a conveyor on an entrance side, an exit side, and the like according to a pipe diameter. For this reason, the time required for cutting was extremely long.

Accordingly, the present invention solves the above-mentioned problems, prevents deformation of the pipe at the time of cutting, prevents burrs from being generated at the cutting edge, and speeds up pipe setting. It is an object to provide a cutting device.

It is another object of the present invention to provide a pipe cutting device capable of preventing a pipe from being deformed even if it is cut into short pieces.

[0007]

In order to achieve the above object, a pipe cutting device according to the present invention comprises a pipe holding means for holding a pipe to be cut, and a rotary cutter disk for the pipe holding means. A pair of feeding means for giving a feed so as to be able to approach and separate freely is arranged symmetrically with respect to a point to be cut of the pipe as a center.

In the pipe cutting device of the present invention, a pair of first and second clamp mechanisms for holding the front and rear portions of the pipe to be cut in a sandwiched manner so as to sandwich the steel pipe cutting surface are centered. Wherein the first and second clamp mechanisms are opened and closed by reciprocating means, and a clamp with a fixed V-groove disposed opposite to the clamp with the movable V-groove. And a member.

Further, the clamp members with movable V-grooves of each of the pair of first and second clamp mechanisms are attached to the common moving member of the reciprocating operation means, and the two clamp members with movable V-grooves are integrally formed. It is designed to be opened and closed.

[0010]

In order to hold the pipe to be cut in the clamped state with the movable V-groove clamp member and the fixed V-groove clamp member of the first and second clamp mechanisms, the holding force acting on the pipe in the circumferential direction is reduced. Disperse in 4 places. Furthermore, the pipe can be held diagonally before and after the portion to be cut, and since the cut surface and the rotary cutter disk are close to each other, the pipe does not move even after cutting, and burrs do not occur at the cutting edge.

Further, if the two clamps with movable V-grooves attached to the common moving member are closed integrally, the holding force is distributed substantially evenly before and after the planned cutting position of the pipe.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing embodiments.

FIGS. 1, 2 and 3 show an embodiment of a pipe cutting apparatus according to the present invention. The apparatus comprises a pipe holding means 2 for holding a pipe 1 to be cut, and a pipe holding means 2 for holding the pipe 1 to be cut. On the other hand, there are provided feed means 4 and 4 for feeding the rotary cutter disks 3 and 3 so that they can approach and separate freely, and a base frame 5 provided with the pipe holding means 2 and the feed means 4.

The pipe holding means 2 is arranged symmetrically with respect to the planned cutting position 6 of the pipe 1 to be cut, and holds a pair of first and second holding members in front and behind the planned cutting position 6 of the pipe 1 to be cut. The first and second clamping mechanisms 7 and 8 are provided. First
The second clamp mechanisms 7, 8 are provided on the top plate 9 of the base frame 5, when viewed in a plan view, at the cut portions 6 of the pipe 1 to be cut.
, A reciprocating operation means 33 which reciprocates vertically, a clamp member 14 having a movable V-groove which is opened and closed by the reciprocation means 33, and a clamp member 14 having a movable V-groove. And a clamp member 15 with a fixed V-groove disposed to face downward.

The reciprocating means 33 is provided on the top plate 9 of the base frame 5.
A cylindrical guide member 10 provided in a penetrating shape, a hydraulic cylinder 11 having a main body 11a fixed to a lower end portion of the guide member 10, and a substantially lower half portion slidably inserted into the guide member 10 up and down. And a lower end connected to the upper end of the cylinder rod 12 of the cylinder 11.
The grooved clamp member 14 is fixed.

The clamp member 14 having a movable V-shaped groove is attached to the upper end portion of the elevating rod 13 by a nut member.
6 and an arm portion 17 horizontally protruding from the mounting portion 16 to the middle portion in the left-right direction of the apparatus. A V-groove 18 in the front-rear direction is formed on the lower surface side of the arm portion 17.

The fixed V-groove clamp member 15 has a longitudinal V-groove 19 located below the V-groove 18 of the arm 17 of the movable V-groove clamp member 14. Furthermore, the V
Along the bottom of the groove 19, a slit-like groove 20 having an upper opening shape for allowing dust to escape is provided.

A front and rear fixed V-groove clamp member 1 is also provided.
A gap S for inserting the rotary cutter disks 3 is provided between the rotary cutters 5 and 15.

The front and rear intermediate portions of the top plate 9 of the base frame 5 in the left and right direction are provided with a V-shaped groove in the outer peripheral surface which is rotatable around the axis in the left and right direction and is circumferential. Pipe support rollers 30 are pivotally provided. This support roller 3
By setting 0 and 30, the pipe to be cut 1 can be sent smoothly, and setting and taking out of the pipe 1 become easy.

The feeding means 4 includes first and second
At the opposite diagonal position to the clamp mechanisms 7 and 8, there are first and second feed mechanisms 21 and 22 disposed symmetrically with respect to the scheduled cutting position 6. First and second feed mechanisms 21 and 22
Are a guide frame 23 fixed on the top plate 9 of the base frame 5, a slide member 24 attached to the guide frame 23 so as to be slidable in the left-right direction, and a shaft in the front-rear direction on the slide member 24. A rotating cutter disk 3 rotatably mounted around the center, a motor 25 attached to the slide member 24 and rotating the rotating cutter disk 3 via a speed change mechanism or the like; Top plate 9
And a hydraulic cylinder member 26 which is horizontally attached to the left and right outer portions of the slide member 24, and whose tip end of a cylinder rod 26b is connected to the outer end of the slide member 24 to move the slide member 24 left and right.

The rotary cutter disk 3 of the first feed mechanism 21
The rotary cutter disk 3 of the second feed mechanism 22 is disposed on a straight line in the left-right direction when viewed in plan.

In order to use the pipe cutting apparatus constructed as described above, first, the clamp members 14, 14 with movable V-grooves of the first and second clamp mechanisms 7, 8 are raised and opened. And the movable V-groove clamp member 14,
14 and the clamp members 15, 15 below the fixed V-grooves
, The pipe to be cut 1 is inserted from the front to the rear. Then, the pipe 1 is set so that the scheduled cutting position 6 of the pipe 1 matches the gap S between the front and rear fixed V-groove clamp members 15, 15.

At this time, the clamp member 15 with the fixed V groove,
Since the pipe 1 fits on the 15 V-grooves 19, 19, the setting of the pipe 1 can be performed quickly and easily. Therefore, the cutting time can be reduced.

Thereafter, as schematically shown in FIG. 5, the clamp members 14 with movable V-grooves of the first and second clamp mechanisms 7, 8 are provided.
14 is lowered to a closed state. Thereby, the pipe 1
Are fixed between the upper and lower V-grooves 18 and 19 so that a holding force F is applied to the peripheral wall of the pipe 1 at four locations in the circumferential direction in the axial direction. Therefore, the concentration of stress can be reduced and the deformation of the pipe 1 (after cutting) can be prevented as compared with a case where the pipe 1 is fixed in a sandwiched state by a conventional flat plate-shaped clamp member.

Then, as schematically shown in FIG. 6, the first and second feed mechanisms 21 and 22 of the feed means 4 are alternately operated, and the right and left rotary cutter discs 3 and 3 are used to move the pipes 1 and 2.
Cut approximately half each. By cutting in this manner, the pipe to be cut 1 having an outer diameter approximately twice as large as the radius R of the rotary cutter disks 3 can be cut.

As is clear from FIGS. 2 and 3, the movable V-groove clamp members 14 and 14 and the fixed V-groove clamp members of the first and second clamp mechanisms 7, 8 are located before and after the scheduled cutting portion 6. Since the pipe 1 is fixed at 15, 15, the pipe 1 can be held so as not to be bent by its own weight immediately after the cutting is completed. Therefore, burrs can be prevented from being generated at the cutting edge, and deburring after cutting becomes unnecessary.

After the cutting of the pipe 1 is completed as described above, the movable V-groove clamp members 14, 14 of the first and second clamp mechanisms 7, 8 are raised to the open state, and the cut pipe 1 is cut. One can be taken out.

It should be noted that a screw shaft and a servomotor may be used instead of the cylinder member 26 of the first and second feed mechanisms 21 and 22 of the feed means 4 shown in FIGS. That is, in this case, the screw shaft is rotatably disposed along the guide frame 23,
A servo motor is linked to it via a speed change mechanism, etc.
Further, a female screw portion may be provided on the slide member 24, and the screw shaft may be screwed into the female screw portion.

FIG. 7 shows a main part of another embodiment.
In this case, the reciprocating means 33 includes one hydraulic cylinder 11 to which the main body 11a is fixed to the mounting portion 32 provided below the top plate 9 of the base frame 5, and the cylinder 11 vertically moves. And a common moving member 31 to be moved. Further, the common moving member 31 is connected to the common support plate 3 fixed to the tip of the cylinder rod 12 of the hydraulic cylinder 11.
4 and two lifting rods 13, 13 whose lower end is fixed to the common support plate 34 and to which the movable V-groove clamp members 14, 14 are attached at the upper end.

In other words, this apparatus comprises the movable V-groove clamp members 14, 14 of the first and second clamp mechanisms 7, 8.
Is attached to the common moving member 31 of the reciprocating means 33 so that the two movable V-groove clamp members 14, 14 are integrally opened and closed.

As shown in FIG. 8, the two movable V-groove clamp members 14, 14 are integrally closed.
Even when one end of the pipe 1 is cut short, the holding forces F ₁ and F ₁ ′ can be prevented from being concentrated only on the short pipe 1 a whose strength is small. Further, since the long pipe 1b has a higher strength than the short pipe 1a, no deformation occurs. Therefore, the two movable V-grooved clamp members 14, 14
Does not descend any more, thereby preventing the short pipe 1a from being deformed.

Next, FIGS. 9, 10 and 11 show another embodiment. In this case, the first and second feed mechanisms 21 and 22 of the feed means 4 are mounted on the top frame 5 of the base frame 5, respectively. A left-right swing frame 35 pivotally mounted on the plate portion 9 via a pivot member 50 so as to be swingable around a longitudinal axis, and a longitudinal shaft is attached to the inner end of the swing frame 35. A rotary cutter disk 3 rotatably mounted around a center, a motor 25 attached to an intermediate portion of a swing frame 35, and a rotational force of the motor 25 interposed between the motor 25 and the cutter disk 3 Linking means 36 comprising a belt 41, pulleys 42, 42 and a transmission 43 for transmitting the rotation to the rotary cutter disc 3, and a main body 26 on the left and right side surfaces of the base frame 5.
and a cylinder member 26 pivotally connected to the outer end of the swing frame 35 at the tip of the cylinder rod 26b.

In this apparatus, cutting is performed by alternately operating the cylinder members 26, 26 of the first and second feed mechanisms 21, 22. That is, when the cylinder rod 26 of one cylinder member 26 is extended, the swing frame 35 swings in a direction in which the outer end rises.

As a result, the inner end of the swing frame 35 swings in the downward direction, and the first rotating cutter disc 3 causes
More than half of the cross section of the connected pipe 1 clamped and fixed by the second clamp mechanisms 7 and 8 is cut. Thereafter, the pipe 1 can be completely cut by cutting the opposite side of the connected pipe 1 with the other rotary cutter disk 3 in the same manner as described above.

[0035]

[Effect of the Invention] The present invention is configured as described above.
The following effects are obtained.

According to the pipe cutting device of the first aspect,
(The first and second clamp mechanisms 7 and 8 are arranged symmetrically with respect to the cut portion 6 of the pipe 1 as a center.
(Because the front and back of the cut scheduled portion 6 are held in a sandwich shape), burr can be prevented from being generated at the cutting edge of the pipe 1 to be cut, and the deburring after cutting becomes unnecessary. Further, it is possible to prevent deformation of the pipe 1 fixed in a clamped state (with the movable V-groove clamp member 14 and the fixed groove clamp member 15).
In particular, it is effective for preventing deformation of a work having a short cutting dimension, which becomes a ring shape after cutting. In addition, the setting of the pipe 1 to the first and second clamp mechanisms 7, 8 can be performed easily and quickly, and the cutting time can be reduced. Also, pipe 1
Can be prevented from being deformed by the holding force of the pipe holding means 2 even when the short pipe is cut into short pieces.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view of an example of the present invention.

FIG. 2 is a plan view.

FIG. 3 is a side view.

FIG. 4 is an enlarged view of a main part of a rotary cutter disk.

FIG. 5 is an explanatory diagram of an operation of a main part.

FIG. 6 is an operation explanatory view of a main part.

FIG. 7 is a front view showing a main part of another performance example.

FIG. 8 is an explanatory diagram of an operation of a main part.

FIG. 9 is a partially cutaway front view of another actual example.

FIG. 10 is a plan view.

FIG. 11 is a side view.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 pipe to be cut 2 pipe holding means 3 rotating cutter disk 4 feed means 5 base frame 6 scheduled cutting location 7 first clamp mechanism 8 second clamp mechanism 14 clamp member with movable V groove 15 clamp member with fixed V groove 31 Co-moving member 33 reciprocating means

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields investigated (Int. Cl. ⁷ , DB name) B23D 45/12 B23D 47/04 B27B 5/00-5/02 B23Q 3/06

Claims (1)

(57) [Scope of request for utility model registration] 1. A pipe holding means 2 for holding a pipe 1 to be cut, and a feeding means 4 for feeding a rotating cutter disk 3, 3 to the pipe holding means 2 so as to approach and separate the pipes.
A pair of first and second clamp mechanisms 7 and 8 that are arranged point-symmetrically (diagonally) about the scheduled shearing point 6 and hold the front and rear of the scheduled shearing point 6 of the pipe to be cut 1 in a sandwich shape. ,
A clamp member 1 having a movable V-groove which is arranged point-symmetrically (diagonally) about a scheduled shearing point 6 and whose first and second clamp mechanisms 7 and 8 are opened and closed by a reciprocating means 33.
The movable V-groove clamp members 14, 14 are provided with fixed V-groove clamps 15, 15 disposed opposite to each other, and each of the pair of first and second clamp mechanisms 7, 8 is movable. The V-grooved clamp members 14, 14 are
Characterized in that the two clamp members with movable V-grooves 14 can be integrally opened and closed by being attached to the common moving member 31.