JP2005001014A - Pipe chamfering apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe chamfering apparatus which smoothly discharges cutting chips produced by chamfering the open end part of a pipe, to the outside of the pipe. <P>SOLUTION: This pipe chamfering apparatus A for chamfering the open end part of the pipe P comprises: a spindle member 1 insert-fitted in a circumferentially rotatable manner into the open end part of the pipe P; a chamfering tool 2 detachably mounted to one end face of the spindle member 1 in the state of projecting a chamfering edge part 2A at the tip outward from the outer peripheral edge part of the spindle member 1; and a rotational operating handle member 3 mounted to one end face of the spindle member 1 through the chamfering tool 2. The rotational operating handle member 3 is provided with a cutting chip discharge hole 31 passing through over both end faces, and the chamfering edge part 2A is placed to face the open end on the chamfering tool 2 side of the cutting chip discharge hole 31. Further, a rake face 21 of the chamfering edge part 2A is formed into an inclined face inclined in a direction of discharging the cutting chips to the cutting chip discharge hole 31 side. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tubular chamfering device capable of smoothly discharging cutting waste generated during chamfering work at an open end of a tubular body to the outside of the tubular body.
[0002]
[Prior art]
Conventionally, before connecting the pipe body and the pipe joint, chamfering the inner peripheral edge of the opening of the pipe body with a pipe chamfering device, so that the fitting of the opening end of the pipe body to the pipe joint is smooth. Has been done.
[0003]
As such a tubular body chamfering device, as shown in Patent Document 1, a shaft provided with a support portion attached to a rotational drive mechanism on one end side, and first and second cutting blades fixed to the shaft, There has been proposed a tubular chamfering device having a guide roller rotatably supported on the other end side of the shaft with each cutting blade interposed therebetween and at least two O-rings integrally provided on the outer periphery.
[0004]
However, cutting waste generated when the inner peripheral edge of the opening of the tube is cut with the first and second cutting blades of the tube chamfer may enter the tube and remain inside the tube. Due to the cutting waste remaining inside the body, there is a problem in that the adhesion at the joint between the pipe body and the pipe joint decreases, and water leakage occurs at the joint between the pipe body and the pipe joint. It was.
[0005]
In addition, the tubular body is used after being cut to a desired length by a general-purpose cutter according to the intended use, or the opening end of the tubular body is deformed into an elliptical shape by cutting the tubular body with this cutter, or The opening end of the tube is reduced in diameter.
[0006]
Furthermore, since the tubes are usually stacked and stored in the vertical direction while being juxtaposed in a state in which a large number of tubes are in close contact in the left-right direction before use, the tubes are stacked above the tube. It is deformed into an oblong shape by the weight of the body.
[0007]
As described above, when the opening end portion of the tube body is deformed or contracted into an elliptical shape, there has been a problem that the pipe joint cannot be smoothly mounted on the opening end portion of the tube body.
[0008]
[Patent Document 1]
JP-A-7-96403 (Claim 1)
[0009]
[Problems to be solved by the invention]
The present invention provides a tubular chamfering device capable of smoothly discharging cutting waste generated by chamfering the open end of the tubular body to the outside of the tubular body.
[0010]
[Means for Solving the Problems]
The tubular chamfering device according to claim 1 is a tubular chamfering device for chamfering an opening end portion of a tubular body, and is a shaft member that is rotatably fitted in the opening end portion of the tubular body in a circumferential direction. A chamfering tool that is detachably attached to one end surface of the shaft member and projects a chamfering blade portion at the tip end outward from the outer peripheral edge of the shaft member, and the shaft member of the shaft member through the chamfering tool. A chamfering bit side of the cutting waste discharging hole, which is provided with a turning operation handle member mounted on one end surface, and provided with a cutting waste discharging hole penetrating between both end surfaces of the rotating operation handle member. The chamfering blade portion faces the open end, and the rake face of the chamfering blade portion is formed as an inclined surface inclined in a direction in which cutting waste is discharged toward the cutting waste discharging hole side. Features.
[0011]
The tubular chamfering device according to claim 2 is the tubular chamfering device according to claim 1, wherein the open end of the tubular body can be corrected to a perfect circle shape by a shaft member. And
[0012]
[Action]
In the tubular chamfering device of the present invention, the chamfering blade portion of the chamfering tool faces the cutting waste discharge hole provided in the rotating operation handle member, and the rake face of the chamfering blade portion is cut by the cutting waste. Since it is formed on an inclined surface that is inclined in the direction to be discharged toward the cutting waste discharge hole, the cutting waste generated by chamfering the open end of the tube with the chamfering blade of the chamfering tool is used for chamfering. The rake face of the blade can be smoothly guided in the direction of the cutting waste discharge hole of the turning operation handle member, and can be smoothly discharged to the outside of the tube through the cutting waste discharge hole. The chamfering operation of the opening end portion of the tube body can be performed without remaining, and the subsequent connection operation between the tube body and the pipe joint can be performed smoothly.
[0013]
And when the opening end of the tubular body can be corrected to a perfect circle shape by the shaft member of the tubular body chamfering device of the present invention, the opening of the tubular body is simultaneously performed with the chamfering operation of the opening end of the tubular body. Since the end portion can be corrected to a perfect circle shape, the connection work between the pipe body and the pipe joint can be performed more smoothly.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
An example of the tubular body chamfering device A of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 3, the tubular chamfering device A includes the shaft member 1, the chamfering tool 2 that is detachably attached to one end surface of the shaft member 1, and the chamfering tool 2 through the chamfering tool 2. It comprises a handle member 3 for rotating operation that is fixed to one end surface of the shaft member 1.
[0015]
The shaft member 1 of the tube chamfer A has an outer diameter that is substantially equal to the inner diameter of the tube P whose opening end is corrected to a perfect circle, and is contracted from one end to the other. It is formed in a cylindrical shape with a diameter.
[0016]
Specifically, the shaft member 1 is gradually reduced in diameter from one end side to the other end side in a portion 12 excluding the other end portion 11, while the other end portion 11 is a remaining portion. The diameter of the shaft member 1 is reduced by a degree of reduction larger than 12 and is formed in a guide portion for smoothly inserting the shaft member 1 into the tubular body P.
[0017]
Furthermore, two mounting screw holes 13 and 14 for detachably mounting the chamfering bit 2 and the rotating operation handle member 3 are formed in one end surface of the shaft member 1.
[0018]
Further, a chamfering bit 2 is detachably attached to one end face of the shaft member 1, and the chamfering bit 2 is a plate-like body having a side surface which has a constant thickness as shown in FIG. A chamfering blade 2A is formed at the distal end by cutting out the front end in a substantially L-shaped side surface. The traveling direction of the chamfering blade portion 2A of the chamfering bit 2 is the front, while the direction opposite to the traveling direction of the chamfering blade portion 2A is the rear.
[0019]
The rake face 21 of the chamfering blade portion 2A of the chamfering bit 2 is inclined in the direction in which cutting waste is discharged toward the cutting waste discharge hole 31 side of the turning operation handle member 3, that is, one end from the other end. The cutting waste generated by the chamfering blade 2A of the chamfering tool 2 being cut off the inner peripheral edge of the opening of the tube P is discharged from the turning operation handle member 3 by the cutting operation. It is configured so as to be continuously led out into the use hole 31 and smoothly discharged to the outside of the pipe body P. Note that the angle of inclination α of the rake face 21 of the chamfering blade 2A of the chamfering bit 2, that is, the rotation center of the tip 20 of the chamfering blade 2A of the chamfering bit 2 and the tip 20 of the chamfering blade 2A of the chamfering blade 2A. The angle α formed by the surface orthogonal to the traveling direction and the tip 20 of the chamfering blade portion 2A is preferably 5 to 20 °.
[0020]
Further, the outer peripheral flank 22 of the chamfering blade portion 2A of the chamfering bit 2 is formed as a flat inclined surface inclined inwardly from one end to the other end and at the rear from the front end to the rear end. It is formed in the inclined surface inclined toward diagonally inward.
[0021]
Furthermore, the rear end corner portion of the outer peripheral flank 22 of the chamfering blade portion 2A of the chamfering bit 2 is cut out between both surfaces to be chamfered. As described above, by forming the chamfered portion 23 on the chamfering blade portion 2A of the chamfering bite 2, even when chamfering the small-diameter tube P, the outer peripheral clearance of the chamfering blade portion 2A of the chamfering bite 2 is obtained. It is possible to prevent the surface 22 from colliding with the inner peripheral surface of the pipe P. Note that the chamfered portion 23 of the chamfering blade portion 2A of the chamfering bit 2 may be formed as necessary.
[0022]
Further, the chamfering bit 2 is provided with mounting holes 24 and 25 penetrating between both surfaces, and the chamfering bit 2 is connected to one end surface of the shaft member 1 and a chamfering blade portion 2A is provided to the shaft member 1. If it arrange | positions in the state protruded outward from the outer peripheral edge part of one end, the mounting holes 24 and 25 of the chamfering bit 2 are configured to match the mounting screw holes 13 and 14 of the shaft member 1.
[0023]
As shown in FIGS. 2 and 3, a turning operation handle member 3 is detachably attached to one end surface of the shaft member 1 via a chamfering tool 2. The rotating operation handle member 3 is formed in a substantially circular side surface having a larger diameter than that of the shaft member 1, and irregularities are alternately formed in the outer peripheral edge portion in the circumferential direction. It is configured so that the handle member 3 for rotating operation can be smoothly and reliably rotated by gripping with a hand.
[0024]
Further, the rotation operation handle member 3 has mounting through holes 32 and 33 extending between both surfaces thereof, and the center of the rotation operation handle member 3 coincides with the axis of the shaft member 1. When the shaft member 1 is disposed on one end surface of the shaft member 1 in this state, the mounting through holes 32 and 33 of the turning operation handle member 3 pass through the mounting holes 24 and 25 of the chamfering bit 2 and the mounting screw hole 13 of the shaft member 1. , 14 are configured to communicate with each other.
[0025]
Then, a turning operation handle member 3 is disposed on one end face of the shaft member 1 via a chamfering bit 2, and the bolt bodies 41 and 42 are attached to the through holes 32 and 33 for attachment of the turning operation handle member 3 and the chamfering. By detachably screwing and integrating with the mounting screw holes 13 and 14 of the shaft member 1 through the mounting holes 24 and 25 of the cutting tool 2, the rotating operation handle member 3 is drawn toward the shaft member 1 side, A chamfering bite 2 is sandwiched between opposing surfaces of the shaft member 1 and the rotation operation handle member 3.
[0026]
Thus, in the state where the chamfering bit 2 and the turning operation handle member 3 are detachably attached to one end surface of the shaft member 1, the chamfering blade portion of the chamfering bit 2 as shown in FIGS. 2A is in a state of projecting outward from the outer peripheral edge of one end of the shaft member 1. In addition, the other end edge of the outer peripheral flank 22 in the chamfering blade portion 2 </ b> A of the chamfering tool 2 is in a state of being entirely immersed inwardly from the outer peripheral edge of one end of the shaft member 1.
[0027]
Further, a portion corresponding to the chamfering blade portion 2A of the chamfering bit 2 in the turning operation handle member 3 is provided with a cutting waste discharging hole 31 extending between both surfaces thereof. The tip 20 of the chamfering blade 2A of the chamfering bit 2 and the rake face 21 connected to the tip 20 face the opening end of the chamfering bit 2 on the chamfering bit 2 side (see FIG. 5).
[0028]
Next, how to use the tubular chamfer A will be described. First, the other end 11 of the shaft member 1 of the tube chamfer A is inserted into the open end of the tube P. Next, the handle member 3 for turning operation of the tube chamfering device A is hammered toward the tube P side using a hammer or the like as necessary, so that the shaft member 1 of the tube chamfering device A is one end thereof. As a completely inserted state, the open end of the tube P is smoothly and reliably corrected to a perfect circle by the shaft member 1. In this state, the inner peripheral end of the opening of the tube P is in contact with the tip 20 of the chamfering blade 2A of the chamfering tool 2 of the tube chamfer A.
[0029]
Thereafter, the handle member 3 for turning operation of the tube chamfering device A is gripped by hand and the handle member 3 for turning operation is turned around the shaft member 1 so that the chamfering blade of the chamfering bit 2 is chamfered. The portion 2A is moved along the inner peripheral end of the opening of the tube P, and the inner peripheral end of the opening of the tube P is continuously chamfered by the chamfering blade 2A (see FIGS. 6 and 7).
[0030]
The thread-like cutting waste B generated by chamfering the inner peripheral edge of the opening of the tube P by the chamfering blade 2A of the chamfering bit 2 is relatively inward of the chamfering blade 2A of the chamfering bit 2. Move backwards.
[0031]
The cutting waste B moved to the inner rear side of the chamfering blade portion 2A inclined in the direction opposite to the traveling direction of the chamfering blade portion 2A toward the cutting waste discharging hole 31 side of the turning operation handle member 3 is obtained. The rake face 21 sequentially leads to the cutting waste discharge hole 31 side of the turning operation handle member 3 and sequentially discharges it to the outside of the tube P through the cutting waste discharge hole 31.
[0032]
Therefore, the cutting waste generated when chamfering the open end of the tube P using the tube chamfer A is discharged outside the tube P with almost no remaining in the tube P, and then the tube body. Even when P is connected to the pipe joint, there is no connection failure due to the cutting waste remaining in the pipe P, and the pipe P and the pipe joint can be connected with high accuracy.
[0033]
Moreover, the open end of the tube P is corrected to a perfect circle by the shaft member 1 of the tube chamfering device A, and the outer peripheral edge of the shaft member 1 is brought into close contact with the inner peripheral surface of the tube P over the entire circumference. In this state, the tube chamfering device A is rotated around the shaft member 1 and the chamfering blade 2A of the chamfering bit 2 chamfers the inner peripheral end of the opening of the tube P. The chamfering blade 2A of the chamfering bit 2 does not enter the inner peripheral end of the opening of the tube P deeply or shallowly, and the inner peripheral end of the tube P is opened by the chamfering blade 2A of the chamfering bit 2. Can be cut with a substantially uniform degree over the entire circumference.
[0034]
Then, after the chamfering operation of the open end portion of the tube body P by the tube chamfer A is completed, the handle member 3 for rotation operation is pulled away from the open end portion of the tube body P to pull the shaft member 1 into the tube. By pulling out from the opening end portion of the body P, it is possible to obtain the tubular body P in which the opening end portion is chamfered and corrected into a perfect circle shape.
[0035]
When replacing the chamfering blade 2A of the chamfering bit 2, the bolt bodies 41 and 42 are screwed out of the mounting screw holes 13 and 14 of the shaft member 1 to separate the chamfering bit 2 from the shaft member 1. Another chamfering bit 2 may be detachably attached to one end surface of the shaft member 1.
[0036]
Although the case where the shaft member 1 is formed in a substantially cylindrical shape has been described above, the shape as shown in FIG. 8 may be used. Specifically, as the shaft member 1 ′, the other end of a truncated triangular pyramid having the other end surface of the one end portion 11 ′ as the bottom surface at the other end of the substantially triangular prism-shaped end portion 11 ′ having a certain length. 12 'may be formed integrally. In addition, about the same structure part as the shaft member 1 shown in FIG. 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
[0037]
And each corner | angular part outer peripheral surface 11a 'of the one end part of the said shaft member 1' is formed in the convex-arc-shaped surface which has a curvature substantially matched with the curvature of the inner surface of the tubular body P which chamfers, The outer peripheral surface 11a 'is configured to be inscribed simultaneously with a virtual perfect circle (the inner surface of the tubular body P that has been corrected into a perfect circle) centered on the axis of the shaft member 1'.
[0038]
When such a shaft member 1 ′ is used, after inserting the shaft member 1 ′ of the tube chamfering device A into the open end of the tube P, the shaft member 1 ′ is centered on the axis. The opening end of the tube body P can be corrected to a perfect circle shape by rotating it.
[0039]
【The invention's effect】
The tubular chamfering device according to claim 1 is a tubular chamfering device for chamfering an opening end portion of a tubular body, and is a shaft member that is rotatably fitted in the opening end portion of the tubular body in a circumferential direction. A chamfering tool that is detachably attached to one end surface of the shaft member and projects a chamfering blade portion at the tip end outward from the outer peripheral edge of the shaft member, and the shaft member of the shaft member through the chamfering tool. A chamfering bit side of the cutting waste discharging hole, which is provided with a turning operation handle member mounted on one end surface, and provided with a cutting waste discharging hole penetrating between both end surfaces of the rotating operation handle member. The chamfering blade portion faces the open end, and the rake face of the chamfering blade portion is formed as an inclined surface inclined in a direction in which cutting waste is discharged toward the cutting waste discharging hole side. As a feature, the pipe body is opened by the chamfering blade of the chamfering tool. Cutting waste generated by chamfering the end is led to the cutting waste discharge hole side of the handle member for rotation operation by the rake face of the chamfering blade, and smoothly discharged to the outside of the tubular body. The chamfering operation can be performed with almost no cutting waste remaining inside.
[0040]
The tubular chamfering device according to claim 2 is the tubular chamfering device according to claim 1, wherein the open end of the tubular body can be corrected to a perfect circle shape by a shaft member. Therefore, it is possible to correct the deformation of the open end of the pipe that occurred during cutting and storage of the pipe into a round shape at the same time as the chamfering work. After connecting, the subsequent work can be performed smoothly.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a tubular chamfering device of the present invention.
FIG. 2 is a longitudinal sectional view showing the tubular chamfering device of FIG. 1;
FIG. 3 is a perspective view showing the tube chamfering device of FIG. 1;
FIG. 4 is a perspective view showing a chamfering tool.
5 is a side view showing the tube chamfering device of FIG. 1; FIG.
6 is a view showing a usage state of the tubular body chamfering device of FIG. 1; FIG.
7 is a perspective view showing a usage state of the tube chamfering device of FIG. 1; FIG.
FIG. 8 is a perspective view showing another example of a shaft member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shaft member 2 Chamfering bit 21 Rake face 22 Relief face 23 Chamfering part 2A Chamfering blade part 3 Rotating operation handle member 31 Cutting waste discharging hole

Claims (2)

A tube chamfering device for chamfering an open end portion of a tube body, and a shaft member that is rotatably fitted in the open end portion of the tube body in a circumferential direction, and is detachably attached to one end surface of the shaft member A chamfering tool that is mounted and has a chamfering blade at the tip projecting outwardly from the outer peripheral edge of the shaft member, and a handle member for turning operation that is mounted on one end surface of the shaft member via the chamfering tool The turning operation handle member is provided with a cutting waste discharging hole penetrating between both end faces, and the chamfering blade portion is exposed to the chamfering bit side opening end of the cutting waste discharging hole. And a rake face of the chamfering blade portion is formed on an inclined surface inclined in a direction in which cutting waste is discharged toward the cutting waste discharging hole. 2. The tubular chamfering device according to claim 1, wherein an opening end of the tubular body can be corrected into a perfect circle shape by the shaft member.

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