JPH079230A - Outer peripheral surface processing device for synthetic resin pipe - Google Patents

Abstract

PURPOSE:To provide an outer peripheral surface processing device for a synthetic resin pipe, capable of smoothly cutting and processing the outer peripheral surface of a non-circular pipe by moving a rotary blade along the outer peripheral surface of the non-circular pipe such as an egg-shaped pipe during the rotation without any vibration. CONSTITUTION:A moving frame 2 is movably placed on a base table 1 in the direction perpendicular to the pipe shaft direction of a pipe to be processed P, and the moving frame 2 and the base table 1 are connected to each other by an extending/contracting driven rod 3 provided with an accumulator, moreover a copying roller 5 relating to the outer peripheral surface of a rotary pipe to be processed P and a rotary blade 6 are journalled to the moving frame 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthetic resin pipe outer peripheral surface processing apparatus for use in cutting an outer peripheral surface of a non-circular pipe such as an oval pipe.

[0002]

2. Description of the Related Art A synthetic resin pipe used for transporting a fluid or the like requires a predetermined secondary processing depending on the connection method.
For example, in the case where synthetic resin pipes are successively driven and buried by the underground propulsion method, as shown in FIG. 2, the surface of the pipe end e is smoothed and thinned to reduce the propulsion resistance. It is necessary to connect this processed surface with the sleeve s via the seal material c.

In this propulsion method, a synthetic resin oval tube may be used, and as a method for thinning the outer peripheral surface of the end of the oval tube, a roll and a rotation following the tip of the rocking rod are used. The blade and the blade are supported coaxially, and these tracing roll and rotary blade are brought into contact with the outer peripheral surface of the pipe to be processed with a predetermined pressure by a hydraulic cylinder and an accumulator mechanism, and the tracing roll is attached to the outer periphery of the pipe. It is known that the contouring movement is performed and the outer peripheral surface of the pipe is cut by a rotary blade that moves integrally with the contouring roll (for example, Japanese Patent Publication No. 58-35837).

In this conventional example, the middle of the oscillating rod is axially attached to a rotary drum fitted in an oval tube and rotating in the circumferential direction,
Following the tip of this rocking rod, the roll and rotary blade are pivotally supported,
The rear end of the oscillating rod and the rotary drum are connected by a hydraulic cylinder and an accumulator mechanism, and the oval tube side is fixed and the rotary drum is rotated. It is difficult to position the center of gravity, the rotational centrifugal force is large, and the rotation speed of the drum is limited.

If the oval tube side is rotated about the center of gravity of the cross section of the tube, this limitation can be eliminated, which is advantageous.

[0006]

In the cutting of synthetic resin, the chips may become discontinuous chips depending on the material. Under such circumstances, compared with the case of continuous chip formation, , The cutting surface becomes rough.

Particularly, in the glass fiber reinforced synthetic resin pipe, it is difficult to smooth the surface to be cut, and the advent of a cutting device capable of performing smooth cutting is demanded. Therefore, even if the above-mentioned contour-type cutting of the synthetic resin oval tube is performed by rotating the oval tube side at high speed, a structure in which a roll following the tip of the swing rod and a rotary blade are pivotally supported Then, the oscillating rod is apt to vibrate, and the chips become discontinuous chips, and the cutting surface is likely to be roughened.

An object of the present invention is to make a synthetic resin pipe capable of moving a rotary blade along the outer peripheral surface of a non-circular tube such as an oval tube which is rotating without vibration and smoothly cutting the outer peripheral surface of the non-circular tube. To provide an outer peripheral surface processing apparatus.

[0009]

According to the apparatus for processing an outer peripheral surface of a synthetic resin pipe of the present invention, a movable mount is movably mounted on a base in a direction perpendicular to the pipe axis direction of the pipe to be processed. The base and the base are connected by a telescopic driven rod with an accumulator, and a follower roll for the outer peripheral surface of the rotary pipe to be processed and a rotary blade are pivotally supported on the movable base.

[0010]

[Operation] The movable pedestal moves in the direction perpendicular to the tube axis together with the follower roll that comes into contact with the outer peripheral surface of the rotated tube (oval tube),
Along with this, the rotary blade also moves in the same manner, and the outer peripheral surface of the rotating pipe is cut under pressure contact between the rotary blade and the outer periphery of the pipe by the fluid pressure cylinder of the follower telescopic rod with accumulator.

Further, as compared with the case where the rotary blade is rotatably supported by the bearing mounted on the movable base and the rotary blade is rotatably supported by the oscillating rod,
Vibration of the rotary blade can be well prevented and the machined surface can be made sufficiently smooth.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A is a plan explanatory view showing an embodiment of the present invention, and FIG. 1B is a side explanatory view of the same.
Shows a synthetic resin oval tube cut by the device of the present invention.

In (a) and (b) of FIG. 1, 1 is a base, which has a floor 11 and a pedestal 12, and has an oval tube P.
It is movable only in the tube axis direction. Reference numeral 2 denotes a movable mount mounted on the base 1, which includes a horizontal portion 21 and a skirt portion 22 and which is sandwiched between the both end guides 13 of the base 1 to form a pipe axis of the oval tube P. The horizontal portion 21 is supported on the pedestal portion 12 of the base 1 via the rolls 23, so that it can be moved only in a direction perpendicular to.

Numeral 3 is a telescopic driven rod with an accumulator, which connects the cylinder portion 31 to the base 1 in the pedestal portion 12 and the piston portion 32 to the front wall 121 of the pedestal portion 12.
It is further pulled out and attached to the movable mount 2.

Reference numeral 4 is a bearing mounted on the front surface of the skirt portion 22 of the movable mount 2, 5 is a follower roll for the outer peripheral surface of the oval tube P to be rotated, and 6 is a rotary blade, which is a follower roll. 5
In addition, the rotary blade 6 is pivotally supported by a shaft 41 common to the bearing 4.

The common shaft 41 is a driving rotary shaft, and the rotation of the rotary shaft 41 is not transmitted to the follower roll 5, that is, the follower roll 5 is a freely rotating driven roll. In addition, a sliding mechanism (bearing) is incorporated between the common shaft 41 and the follower roll 5.

Reference numeral 71 is an electric motor, 72 is a pulley attached to the common shaft 41, and 73 is a transmission belt. Although the accumulator of the expansion / contraction driven rod 3 is not shown, it is incorporated in a hydraulic circuit for advancing and retracting the piston portion 32 of the fluid pressure cylinder to reduce pressure fluctuation of the fluid pressure cylinder, which will be described later. As described above, the follower roll 5 is moved so as to follow the outer circumference of the rotary oval tube P, and the outer circumference of the rotary oval tube P is cut by the rotary blade 6 under the guide action of the follower roll 5. It is required to bring the follower roll 5 and the rotary blade 6 into contact with the outer peripheral surface of the oval tube P at a constant pressure during the course of movement.

In the above-mentioned oval tube P, at the time of processing, support tools 81 are fitted inside both ends of the tube, and each of the support tools 81 is supported by a tailing jig 82, and can be rotated with the center of gravity of the cross section as the tube axis. . With the cutting apparatus of the present invention, in order to reduce the thickness of the end portion of the oval tube P as shown in FIG. 2, the roll 5 which follows the pressure of the fluid pressure cylinder 31 of the driven telescopic rod 3 is used. P
The outer surface of the oval tube P is brought into contact with the outer surface of the oval tube P under a predetermined pressure, and the follower roll 5 follows the outer peripheral surface of the rotating tube P and moves in the direction perpendicular to the tube axis of the oval tube P together with the movable mount 2. Let

With the movement of the movable base 2, the rotary blade 6 supported by the movable base 2 also moves, and the difference Δt between the outer diameter of the follower roll and the outer diameter of the rotary blade is used as a cutting allowance to follow the outer peripheral surface of the pipe. Cutting is progressing.

In this case, the driven telescopic rod 3 is expanded and contracted with the rotation of the oval tube P, but the pressure of the fluid pressure cylinder 31 is kept constant by the accumulator, and the rotary blade 6 and the follower roll 5 are kept. Since the pressure contact between the oval tube P and the oval tube P is ensured during the rotation of the oval tube P, the cutting proceeds without leaving any uncut residue.

A predetermined cutting width can be obtained by moving the base 1 in the pipe axis direction at an appropriate speed. In the above, the profiling roll 5 is the apex u of the oval tube P.
When the driven telescopic rod 3 comes into contact with, the protruding length of the driven telescopic rod 3 becomes maximum and becomes considerably long, but since the tip 321 is supported by the movable mount 2, the protruding length of the driven telescopic rod 3 is the It does not contribute to the stability of the supportive state. On the other hand, when the tip of the telescopic rod is not supported and the state becomes a cantilever with the rear end supported in the free state of the tip, the telescopic rod vibrates and the cutting surface is roughened.

However, in the apparatus for processing the outer peripheral surface of the synthetic resin pipe of the present invention, since the rotary blade 6 is stably supported on the stable movable base 2 via the bearing 4, vibration of the rotary blade 6 is prevented. It can be well prevented and the cutting surface can be made sufficiently smooth.

In the present invention, not only a cutting blade but also a grindstone can be used as the rotary blade. The present invention can be used not only for the above-described thinning of the oval tube end, but also for chamfering the tube end and processing the rubber ring mounting groove.

The present invention is used for processing synthetic resin pipes such as vinyl chloride pipes and polyethylene pipes, and is particularly preferably applied to glass fiber reinforced synthetic resin pipes having large cutting resistance. INDUSTRIAL APPLICABILITY The present invention can be used for processing pipe bodies such as fluid transport pipes and sewer pipes, as well as for processing joint pipes.

[0025]

EFFECT OF THE INVENTION The outer peripheral surface machining apparatus for synthetic resin pipes of the present invention is constructed as described above, and can cut or grind the outer surface of the oval pipe. In this case, the rotary blade is well suppressed in vibration and stable. Since it can be supported, the outer surface of a non-circular tube such as an oval tube can be smoothly cut or ground.

[Brief description of drawings]

FIG. 1A is a plan explanatory view showing an embodiment of the present invention, and FIG. 1B is a side explanatory view thereof.

FIG. 2 is an explanatory view showing a connection structure of pipe end portions processed by the processing apparatus of the present invention.

[Explanation of symbols]

 1 Base 2 Movable Base 3 Telescopic Drive Rod with Accumulator 4 Bearing 5 Tracing Roll 6 Rotating Blade 71 Electric Motor 72 Pulley P Work Pipe

Claims (1)

[Claims] 1. A movable mount is mounted on a base so as to be movable in a direction perpendicular to the pipe axis direction of the pipe to be processed, and the movable mount and the base are connected by a telescopic driven rod with an accumulator. An outer peripheral surface processing apparatus for a synthetic resin pipe, wherein a follower roll for the outer peripheral surface of the rotary processed pipe and a rotary blade are pivotally supported on a movable frame.