JPS5835838B2 - pipe nomentoresetudanouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pipe chamfer cutting device that can be used for synthetic resin pipes with irregular cross-sections other than perfectly circular synthetic resin pipes.

In conventional equipment, a cutting blade is provided on a rotary drum that is fitted onto a pipe and rotates in the circumferential direction, and the cutting blade is rotated in contact with the peripheral wall of the pipe to cut and chamfer the cut end surface.
The cutting blade is designed to rotate in a circular orbit around the central axis of the pipe, so it is not suitable for pipes with irregular cross-sections, such as elliptical or egg-shaped pipes. , the cutting blade does not follow the cross-sectional shape and cannot be used.

In view of the above points, the present invention provides a pipe chamfering and cutting device that enables chamfering and cutting by rotating a cutting blade that closely follows the shape of a pipe having an irregular cross-sectional shape such as an oval or oval shape. The purpose is to provide.

The gist of this invention is that a swinging rod and a fluid pressure cylinder are pivotally attached to a rotating drum that is fitted into a pipe and rotates in the circumferential direction, and a piston rod of the fluid pressure cylinder is connected to one side of the swinging rod. A guide processor and cutting blade are installed on the other side,
The invention resides in a pipe chamfering and cutting device comprising an accumulator disposed in the fluid pressure cylinder.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The pipe chamfer cutting device of the present invention will be described below with reference to embodiments of the drawings.

Reference numeral 1 denotes a frame which is movable by a moving vehicle 2.2 and which holds a synthetic resin pipe 3 having an egg-shaped cross section and which is continuously extruded from an extrusion device (not shown), and extrudes the pipe synchronously with the pipe. 3 in the axial direction.

Reference numeral 4 denotes a rotating drum, which is rotatably supported on the frame 1 by rollers 5, 5', etc., and rotated along the circumferential direction of the pipe 3 by a rotation drive device (not shown) when necessary. There is.

Reference numeral 6.6' denotes a swinging rod, which is pivotally attached to the rotating drum 4 1.1'.

A piston rod of a hydraulic cylinder 10, 10' is connected to one end of each.

Furthermore, a motor 8,8' for rotationally driving cutting blades 9,9', which will be described later, is provided at the shaft attachment portion 1.1' of the swinging rod 6,6'.

On the other end sides of the swinging rods 6, 6', cutting blades 9, 9' are provided coaxially with the guide rollers 11, 11' and protruding in the direction of the central axis of the rotary drum 4, that is, toward the pipe 3.

The cutting blades 9.9' are all rotary type driven by a motor 8.8', one cutting blade 9 is used for chamfering, and the other cutting blade 9' is used for cutting pipes.

Reference numerals 12 and 12' are weights, and the swinging rods 6 and 6' use the shaft attachment parts 7 and 7' as fulcrums to maintain balance on both sides, and are provided as necessary, but they may be slightly unbalanced. Balance is allowed in reality.

The fluid pressure cylinders io, io' have one end pivotally attached to a rotating drum 4, and a swinging rod 6 that moves as the piston rod reciprocates.
．． The cutting blade 9.6' swings around the shaft attachment part 7.7' as a fulcrum.
The mechanism is such that 9' comes into contact with and separates from the pipe 3.

13 and 13' are accumulators that reduce pressure fluctuations in the respective fluid pressure cylinders 10 and 10';
When the cutting blades 9, 91 and the guide rollers 11, 11' contact the pipe 3 and cut the pipe wall, the arrangement is made to keep the pressing force of the cutting blades 9, 9' and the guide rollers 11, 11' constant. Specifically, the accumulator 13
．． 13 is connected to a fluid feed pipe for advancing the piston rods of the hydraulic cylinders io, io'.

Next, the manner in which the pipe chamfer cutting device described above is used will be explained.

A synthetic resin pipe 30 having an oval cross section that is continuously extruded from an extrusion device (not shown) is held at a predetermined position by a holding device (not shown) provided on the frame 1, and the frame 1 is used to transport the pipe 3. It moves in the direction of transport in synchronization with the speed.

At this time, the rotating drum 4 rotates in the direction of the arrow A, and the hydraulic cylinder 10 is operated in the direction in which its piston rod moves forward (in the direction of the arrow B), thereby bringing the chamfering cutting blade 9 into contact with the pipe 3.

The cutting blade 9 for chamfering is rotationally driven by a motor 8, guided by the wall soil surrounding the pipe 30 by the rotation of a guide roller 11 and a rotating drum 4 provided coaxially, and moves along the outer peripheral wall surface of the pipe 3 in its circumferential direction. and cut the pipe wall.

At this time, the guide roller 11 has its pivot point 7 on the swinging rod 6.
, and since the accumulator 13 is disposed in the fluid pressure cylinder 10, the pressing force of the guide roller 11 against the outer peripheral wall surface of the pipe 3 is almost constant, and the guide roller 11 and the chamfering cutting blade 9
moves smoothly along the outer periphery of the pipe 3, which is not a perfect circle.

After the rotating drum 4 is rotated once and the chamfering cutting blade 9 cuts to a certain depth, the fluid pressure cylinder 10 is operated in reverse to move its piston rod backward, and the chamfering cutting blade 9 and the guide roller 11 are removed from the pipe 3. Move further away.

Next, while rotating the rotating drum 4 in the opposite direction,
The other hydraulic cylinder 10' is operated in the direction in which its piston rod advances, and the pipe cutting blade 9' is brought into contact with the pipe 3.

The cutting blade 9' for cutting the pipe has a positional relationship with the cutting blade 9 for chamfering as shown in FIG.
The blade contacts the cut portion, moves along the outer circumferential wall of the pipe 3 under the guidance of the guide roller 11', and cuts the pipe 3.

As in the case of the chamfering cutting blade 9, the swinging rod 6' is balanced, and the fluid pressure cylinder 10 is provided with an accumulator 13', so that the guide roller 1
The outer circumferential wall of the pipe 3, which is not a right circle, is moved smoothly in the circumferential direction, and the pipe 3 is cut.

After the rotating drum 4 rotates once to cut the pipe 3, the fluid pressure cylinder 10' is operated in reverse to move the piston rod back and cut the cutting blade 9' and the guide roller 11' into the pipe 3.
to separate from

The pipe 3 is released from the clamping tool of the frame 1, and the frame 1 is returned to its original position.

Same, movement of clamping frame 1 of pipe 3, fluid pressure cylinder i
o, io' operation, rotating drum 40 rotations, cutting blade 9
．． A series of operations such as rotational drive of 9' are performed automatically by an automatic operation mechanism.

Furthermore, although the cutting blades 9 and 9' are used separately for chamfering and cutting in this embodiment, it is possible to use one with a structure that allows cutting and chamfering to be performed with -2 cutting blades. In this case, only one swing rod, hydraulic cylinder, etc. is required.

Furthermore, the rotating drum 4 is rotated in opposite directions for chamfering and cutting, which is caused by the accumulator 13.13.
This is because of the connection to the piping, and is not a necessary condition for this invention.

In this way, the pipe 3 is cut and the end face of the cut part is chamfered. This process is repeated at intervals, and the synthetic resin pipe with an oval cross section is continuously extruded from the extruder. 3 is cut to a predetermined length and the end face of the cut portion is chamfered.

As described above, the pipe chamfer cutting device of the present invention has the following features:
A swinging rod and a fluid pressure cylinder are pivotally attached to a rotating drum that is fitted onto a pipe and rotates in the circumferential direction, and a piston rod of the fluid pressure cylinder is connected to one side of the swinging rod, and a guide roller is connected to the other side. Since a cutting blade is provided and an accumulator is disposed in the fluid pressure cylinder, the swinging rod is relatively balanced with the pivot point as a fulcrum, and the accumulator minimizes pressure fluctuations in the fluid pressure cylinder. The contact pressure of the adder in contact with the pipe remains the same, with little variation depending on the contact position, even for non-right circular pipes.

Therefore, the guide roller smoothly moves the outer wall of the pipe and guides the cutting blade well, so even if the pipe has an irregular cross section, such as an oval or oval cross section, it will work just as well as a perfectly round pipe. This allows chamfering and cutting.

[Brief explanation of drawings]

FIG. 1 is a front view of an embodiment of the device of the present invention, and FIG.
FIG. 3 is an explanatory diagram showing a state in which a pipe is cut by a cutting blade in the device shown in the figure. 1... Frame body, 3... Pipe, 4...
... Rotating drum, 6.6... Swinging rod, 9,
91...Cutting blade, 10°10'...Fluid pressure cylinder 11.11'...Guide roller i3.13'...Accumulator.

Claims (1)

[Claims] 1 A swinging rod and a fluid pressure cylinder are pivotally attached to a rotating drum that is fitted into a pipe and rotates in the circumferential direction, and a piston rod of the fluid pressure cylinder is connected to one side of the swinging rod, and a guide roller is attached to the other side. A pipe chamfering and cutting device comprising: a cutting blade; and an accumulator disposed in the fluid pressure cylinder.