JP2002301617A - Tool for processing end face of pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tool for processing an end face of a pipe excellent in durability while easily obtaining in good work efficiency a uniform and good end face process even without particularly a skilled worker, in the tool for processing the end face of the pipe removing a burr generated in a cut section in the case of cutting the pipe to perform work into a good end face. SOLUTION: This tool performs processing of an end face of a cut pipe 5, a tapering guide part 2 of tapered shape inserted in the internal periphery of the pipe 5 is provided in a tip end side of a cut part 3, and its rear end side is provided with a mounting shaft part 4 mounted in a chuck 6 of a power tool, the cut part 3 is provided with an inner blade 7 performing chamfering relating to the internal peripheral surface of the pipe 5, an outer blade 9 performing chamfering relating to the external peripheral surface of the pipe 5, and an end face blade 8 cutting the end face of the pipe 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe end processing tool for removing burrs generated on a cut surface when a pipe is cut and processing the pipe to a good end face. It is suitable for use.

[0002]

2. Description of the Related Art For example, when a pipe such as a thin stainless steel pipe, a copper pipe, or a steel pipe is used to perform a plumbing operation on a water pipe, a gas pipe, or the like, cutting means such as a hand saw, a high-speed cutting machine, or a manual cutter is required. It is necessary to cut a long pipe to a desired length, or to connect the cut pipe with a joint means so as to fit the pipe flow path.

[0003] The cut pipe has burrs on the outer peripheral surface and the inner peripheral surface, and the end surface is not a smooth surface. Since a fluid leakage occurs due to damage to rubber or resin packing, an end face treatment for removing burrs is performed.

In this end face treatment means, since a full-scale stationary type chamfering device is large and expensive, it is difficult to use it at a site of a large construction work. However, chamfering on the outer peripheral surface is performed using a power tool such as a disc grinder or a manual tool such as a file, and chamfering on the inner peripheral surface is performed using a manual tool such as a burring reamer.

[0005] For example, Japanese Patent Laid-Open No. 2000-271802
As described in the invention disclosed in No. 5, a plurality of substantially V-shaped deburring plate blades are provided on the front surface of a disk-shaped foil,
A rotary blade for deburring, which is used by attaching it to a rotary tool such as a grinder, has also been proposed.

[0006]

However, in the case of the former end face processing means, work efficiency is not good, it is difficult to secure safe work, and a uniform and good end face is required unless a skilled worker is used. There was a problem in that processing was difficult to obtain.

[0007] In the case of the latter end processing means, there is a problem in durability in performing the end processing of the hard pipe due to the plate-like blade, and the end processing is gradually deteriorated due to wear and deformation. There is a problem in that it may be difficult to apply the deburring rotary blade to the end face of the pipe in a constant and stable state.

Accordingly, the present invention is an end face processing means capable of solving these problems of the prior art. Even if not a skilled worker, uniform and good end face processing can be easily obtained with good work efficiency and durability. Provided is an end processing tool for pipes having excellent performance.

[0009]

SUMMARY OF THE INVENTION The present invention is directed to a tool for treating an end face of a cut pipe, wherein a tapered guide portion to be inserted into an inner periphery of the pipe is provided at a tip end of a cutting portion, and a cutting portion is provided. At the rear end side of the portion is provided a mounting shaft portion to be mounted on the chuck of the power tool, the cutting portion has an inner blade for chamfering the inner peripheral surface of the pipe, and an outer blade for chamfering the outer peripheral surface of the pipe. A pipe end face processing tool characterized by comprising:

In this tool for treating an end face, the guide provided at the tip of the cutting portion protrudes into the pipe, so that the degree of contact of each cutting blade with the pipe can be properly corrected, so that the pipe or tool is not fixed. Since accurate positioning can be performed, and even one worker can perform processing, good end face processing can be performed in a state of high work efficiency.

Further, since the cutting blade does not suddenly enter the pipe, there is no possibility that the cutting blade contacts the inner surface of the pipe and damages the cutting blade or the inner surface of the pipe. Since the cutting is performed at the same time, it is possible to perform a safe and high-yield end face processing.

In another tool for treating an end face according to the present invention, a cutting blade formed in a cutting portion is provided with an end face blade for cutting an end face of a pipe in addition to the inner cutter and the outer cutter. It is possible to perform a three-sided treatment for simultaneously removing burrs on the inner and outer surfaces and cutting the end surface.

The cutting portion of the end face processing tool has a plurality of blade-shaped cutting pieces parallel to the axial direction projecting from the outer periphery of the shaft core portion. It is possible to adopt a form in which a cutting blade is formed by the blade or the inner blade, the outer blade, and the end surface blade, and each of the cutting blades is provided in a desired arrangement at a plurality of positions.

Since each cutting blade uniformly contacts the cut surface of the pipe, uniform end face processing can be performed without deviation, and a specific cutting blade is not overloaded and worn. , The durability life can be increased.

[0015] In the end face processing tool, it is possible to adopt a form in which the outer periphery of the cutting portion is covered and the tip side is provided with a protective cover surrounding the outer periphery of the pipe when the end face is processed. There is no danger of injury, and it also prevents cutting chips from scattering around, and the cutting chips are discharged to the outside through the grooves formed between the rake faces of the cutting pieces. No clogging.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a tool for treating an end face of a pipe according to the present invention will be described below with reference to FIGS.
1 is an overall perspective view including an end face processing tool, FIG. 2 is a front view and a side view of the end face processing tool, and FIG. FIGS. 4 and 5 show another embodiment of the tool for treating an end face, respectively.

The end face processing tool 1 has a guide portion 2 inserted at the inner peripheral side of the pipe 5 at the tip end side, and the first to third guides in the middle.
A cutting portion 3 having cutting pieces 3A, 3B, and 3C protruding from the outer periphery thereof, and a mounting shaft portion 4 attached to a chuck 6 of an electric rotating tool is provided at a rear end side. As shown in FIGS. 1 and 2, they are integrally formed using high-speed tool steel or the like.

The guide portion 2 is formed in a tapered shape so that even if the guide portion 2 is slightly eccentrically inserted into the inner peripheral side of the pipe 5, the posture is immediately adjusted so as not to damage the inner peripheral side of the pipe 5 and the cutting blade. Can be corrected, and in the illustrated embodiment, the truncated cone shape is used in consideration of safety. However, it is also possible to adopt a conical shape, and the length is arbitrarily set according to the diameter of the pipe 5. You.

The mounting shaft 4 is provided with a plurality of chamfers on its outer periphery as a detent when mounted on the chuck 6, and in the illustrated embodiment, three chamfers are formed at equal intervals in the illustrated embodiment. The shape is adapted to the chuck 6 of the electric rotary tool used such as an electric drill or a charging drill.

The cutting portion 3 is a cutting piece 3A on which a first cutting blade (inner blade) 7 for chamfering the inner peripheral side of the pipe 5 is formed.
And a second cutting blade (end face blade) for cutting the end face of the pipe 5
A cutting piece 3B on which an outer peripheral side of the pipe 5 is chamfered and a cutting piece 3C forming a third cutting blade (outer blade) 9 for chamfering the outer peripheral side of the pipe 5
Are projected from the shaft body 10 respectively.

The cutting pieces 3A, 3B, 3C are
2 are provided at a plurality of positions at equal intervals along the outer circumference of FIG.
In this embodiment, six blades are arranged clockwise in the order of the inner blade 7, the end blade 8, and the outer blade 9 at two locations each, and a rake face is provided between the cutting pieces 3A, 3B, 3C. Are formed to discharge cutting chips.

The number of blades of the cutting portion 3 can be modified as desired. For example, as shown in FIG. 4A, three cutting pieces 3A, 3B and 3C are provided at three positions. Each of the cutting pieces 3A, 3B, and 3C may be protruded at four locations to form 12 blades as in the embodiment of FIG. 4B.

The configuration of the number of blades is set as desired according to the material (particularly the hardness) of the pipe 5 and the size of the bore. However, when the hardness is high or the bore is large, the number of blades is increased and the cutting is performed. Otherwise, the number of blades is reduced with emphasis on economy, and especially when the end face finishing is not a problem, a configuration without the cutting piece 3B in which the end face blade 8 is omitted can be adopted.

The cutting piece 3A is entirely formed of a blade-shaped rib parallel to the axial direction, and a tip side of the rib is
An edge is provided which extends obliquely along a substantially extended line of the tapered surface of the guide portion 2. The edge forms a first cutting blade (inner blade) 7 and a second cutting edge for forming a clearance angle. I'm taking.

The whole cutting piece 3B is formed by a blade-shaped rib parallel to the axial direction, and a tip side of the rib is
An edge extending substantially orthogonal to the axial direction is provided, and the edge forms a second cutting blade (end face blade) 8 and a second cut to form a clearance angle.

The cutting piece 3C is entirely formed by a blade-shaped rib parallel to the axial direction, and a tip end of the rib is
An edge that is inclined to face the tapered surface of the guide portion 2 is provided, and a third cutting blade (outer blade) 9 is formed by the edge, and a second cutting is performed to form a clearance angle.

The outer periphery of the cutting pieces 3A, 3B, 3C may be provided with a protective cover 11 capable of covering the outer periphery of the pipe at the end when the end face is processed. It is possible to prevent an operator from coming into contact with the workpiece and to prevent scattering of cutting chips.

The protective cover 11 is desirably transparent or translucent so that the inside can be seen through. For example, the protective cover 11 can be formed of a synthetic resin material such as an acrylic material. Cover 1
A spring washer 12 that supports the rear end face of the mounting shaft 1 is fitted into the mounting shaft 4, and a C-shaped retaining ring 13 is inserted into a circumferential groove provided in the mounting shaft 4.
This is achieved by preventing the spring washer 12 from coming off.

The end face processing tool 1 having the above-described structure has the electric rotary tool mounted on the mounting shaft 4 via the chuck 6 with one hand and the cut pipe 5 with the other hand.
The end face processing operation can be performed while holding the edge.

The end face processing operation is performed by rotating the end face processing tool 1 with an electric rotating tool so that the distal end side of the guide portion 2 protrudes into the inner peripheral portion of the pipe 5, the axial direction of the pipe 5 and the end face processing tool 1. The posture is automatically corrected so as to match, and when the guide portion 2 is subsequently inserted, the end face processing is performed as shown in FIG.

FIG. 3 (a) shows a first cutting blade (inner blade) 7 chamfering the inner peripheral surface of the pipe 5 to remove burrs, and FIG. 3 (b) shows a second cutting blade (end surface blade). 8) cuts the end face of the pipe 5 to increase the smoothness, and (c)
3 shows a state in which the third cutting blade (outer blade) 9 chamfers the outer peripheral surface of the pipe 5 to remove burrs.

In the processing of the end face, the degree of contact of each cutting blade with the pipe 5 is appropriately corrected by the guide portion 2 which has entered the pipe 5 prior to the end face processing.
Accurate positioning can be performed without fixing a pipe or a tool, and even one operator can perform a processing process, so that a good end face processing can be performed with a high working efficiency.

Further, since the guide blade 2 is provided at the end to prevent the cutting blade from suddenly entering the pipe 5, there is no possibility that the cutting blade contacts the inner surface of the pipe and damages the cutting blade or the inner surface of the pipe. Since the cutting blades perform the cutting work almost at the same time after correcting the above, it is possible to perform safe and high-yield end face processing.

Further, since a portable electric rotating tool such as an electric drill or a charging drill used in other work can be used, it is suitable for an inexpensive and small-scale piping work site.

Further, since the protective cover 11 covers the outer periphery of the cutting blade, there is no risk of injury due to contact with the operator, and the outer periphery of the pipe 5 near the end face is processed during the processing of the end face. Therefore, the cutting chips are prevented from being scattered around, and the cutting chips are discharged to the outside through the grooves formed between the rake faces of the cutting pieces, so that the cutting blades are not clogged. .

FIG. 5 shows an end face processing tool 14 according to still another embodiment of the present invention. In this embodiment, a cutting portion 16 for forming an inner blade 15 for chamfering the inner peripheral side of the pipe 5 is provided. The cutting portion 18 forming the outer blade 17 for chamfering the outer peripheral side of the pipe 5 is made separate and detachable,
The configuration is such that an end face blade for cutting the end face of the pipe 5 is omitted.

The cutting portion 16 is integrally formed in a continuous tapered state on the rear end side of the guide portion 19 formed of a tapered surface, and a spiral cutting groove is provided on the outer periphery thereof, and a drill-like shape is formed at the edge thereof. An inner edge 15 is formed, and a rear end side of the cutting portion 16 is integrally connected to a mounting shaft portion 21 via a screw shaft 20.

The cutting portion 18 has a bottomed cylindrical shape with a fitting hole formed in the bottom surface, and a plurality of (four in the illustrated embodiment) cutting pieces 18A are formed so as to surround the outer periphery of the cutting portion 16. Inner blade 1 that protrudes forward from the rear end side along the direction and chamfers the inner peripheral side of the pipe 5 with the edge of each cutting piece 18A.
5 are formed.

The cutting portion 18 is mounted on the rear end side of the cutting portion 16 by inserting the mounting shaft portion 21 into the fitting hole.
Are connected to the cutting portion 16 side by a nut 3 screwed to the screw shaft 20 via the.

The end face processing tool 14 includes a cutting part 16 forming an inner blade 15 and a cutting part 1 forming an outer blade 17.
By making it detachable from 8, it is possible to easily replace it when one of them is worn or damaged.

[Brief description of the drawings]

FIG. 1 is a perspective view of the entirety including a tool for treating an end face according to the present invention.

FIG. 2 shows (a) a front view and (b) a side view of an end face processing tool according to the present invention.

FIG. 3 shows a use state diagram of the end face processing tool in the present invention.

FIG. 4 is a front view of another embodiment of the end face processing tool according to the present invention.

FIG. 5 shows (a) a side view showing a part in cross section and (b) a front view according to still another embodiment of the end face processing tool of the present invention.

[Explanation of symbols]

 1,14 End-face processing tool 2,19 Guide part 3,16,18 Cutting part 3A, 3B, 3C, 18A Cutting piece 4,21 Mounting shaft part 5 Pipe 6 Chuck 7,15 First cutting blade (inner blade) Reference Signs List 8 second cutting edge (end face edge) 9, 17 third cutting edge (outer edge edge) 10 shaft core 11 protection cover 12, 22 spring washer 13 C-shaped retaining ring 20 screw shaft 23 nut

 ──────────────────────────────────────────────────続 き The continuation of the front page F term (reference) 3C022 DD07

Claims (4)

[Claims] 1. A tool for processing an end face of a cut pipe, wherein a tapered guide portion to be inserted into an inner periphery of the pipe is provided at a tip end of the cutting portion, and a tool is provided at a rear end side of the cutting portion. A mounting shaft portion to be mounted on the chuck of the power tool is provided, wherein the cutting portion includes an inner blade for chamfering the inner peripheral surface of the pipe, and an outer blade for chamfering the outer peripheral surface of the pipe. For treating pipe end faces. 2. A tool for processing an end face of a cut pipe, wherein a tapered guide portion to be inserted into an inner periphery of the pipe is provided at a tip end of the cutting portion, and a tool is provided at a rear end side of the cutting portion. Providing a mounting shaft portion mounted on the chuck of the power tool, the cutting portion is an inner blade for chamfering the inner peripheral surface of the pipe, and an outer blade for chamfering the outer peripheral surface of the pipe,
An end face processing tool for a pipe, comprising: an end face blade for cutting an end face of the pipe. 3. The cutting portion projects a plurality of blade-shaped cutting pieces parallel to the axial direction from an outer periphery of the shaft body portion,
A cutting blade formed by the inner blade and the outer blade or the inner blade, the outer blade, and the end surface blade on a tip side of the cut piece, and each of the cutting blades is provided at a plurality of positions in a desired arrangement. Item 2. A tool for treating an end face of a pipe according to Item 2. 4. The pipe according to any one of claims 1 to 3, wherein the end face processing tool has a protective cover that covers an outer periphery of a cutting portion and a front end side surrounds an outer periphery of the pipe during the end face processing. Tools for edge treatment.