JP4328133B2 - Tube chamfer - Google Patents

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 the inner peripheral end portion of the opening of the tubular body, and is inserted into the opening end portion of the tubular body so as to be rotatable in the circumferential direction. A shaft member and a chamfering blade portion, which is detachably attached to one end surface of the shaft member and has a front end portion of a side plate having a vertically long rectangular shape cut out in a substantially L-shaped side surface, is attached to the outside of the shaft member. A chamfering tool protruding outward from the peripheral edge, and
The rotating operation handle member is mounted on one end surface of the shaft member via the chamfering tool, and a cutting waste discharging hole penetrating between both end surfaces is provided in the rotating operation handle member. , the chamfered byte-side opening end of該切Kezukuzu discharge hole with which to face the chamfered blade section, the direction of the rake face of the chamfered blade section cutting chips are discharged to the chip discharge hole side the other end toward the one end to form an inclined surface which is inclined obliquely rearward from the, the rotation operating handle member is rotated around the shaft member, the opening in the circumference of the chamfering blade section tube chamfer bytes The cutting waste generated by cutting off the end portion is discharged from the cutting waste discharge hole of the rotating operation handle member to the outside of the tube body .
[0011]
The tubular chamfering device according to claim 2 is configured such that the inner peripheral end of the tubular body can be corrected to a perfect circle shape by the shaft member in the tubular chamfering device according to claim 1. It is characterized by.
[0012]
[Action]
In the tubular chamfering device of the present invention, a chamfering blade portion in which a front end portion of a side surface of a vertically long rectangular plate is cut into a substantially L-shaped side surface is protruded outward from an outer peripheral edge portion of a shaft member. The chamfering blade portion of the chamfering tool that is facing the cutting scrap discharge hole provided in the handle member for rotation operation, and the scraping surface of the chamfering blade portion is discharged to the cutting dust discharge hole side. since the direction is formed on the inclined surface inclined obliquely rearward toward one end from the other end that, cutting debris generated by the chamfering blade section of the chamfer bytes chamfering the opening inner peripheral end portion of the tube and smoothly guided to the chip discharge hole direction of the rotation operating handle member by a rake face of the chamfered blade section, it can be smoothly discharged to the tube outside through該切Kezukuzu discharge hole, the tube body Of the open end of the tube Take working, you can then smoothly perform the work of connecting the tube and the tube coupling that takes place.
[0013]
When the inner peripheral end of the tube body can be corrected to a perfect circle shape by the shaft member of the tube chamfering device of the present invention, the tube body is simultaneously with the chamfering operation of the tube opening end. Since the opening end of the tube can be corrected to a perfect circle, 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 slightly 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 tip by cutting out the front end of the tip into a substantially L-shaped side surface. The traveling direction of the chamfering blade portion 2A of the chamfering bit 2 is defined as the front, while the direction opposite to the traveling direction of the chamfering blade portion 2A is defined as 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 handle member 3 for rotating operation. It is configured so as to be continuously led out into the service 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 cutting tool 2 of the chamfering bit 2, that is, the rotation center of the tip 20 of the chamfering cutting tool 2 A of the chamfering tool 2 and the tip 20 of the chamfering cutting tool 2 A of the chamfering cutting tool 2 2. 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 inwardly inclined from one end to the other end, and at the rear side from the front end to the rear end. It is formed in the inclined surface inclined toward diagonally inward.
[0021]
Further, 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 23. Thus, by forming the chamfer 23 on the chamfering blade 2A of the chamfering bit 2, even when chamfering the small-diameter tube P, the outer peripheral clearance of the chamfering blade 2A of the chamfering bit 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. When arranged in a state of projecting outward from the outer peripheral edge 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 rotating operation handle member 3 has mounting through holes 32 and 33 extending between both surfaces thereof, and the center of the rotating 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 holes 13 of the shaft member 1 are attached. , 14 is configured to communicate with each other.
[0025]
Then, a turning operation handle member 3 is disposed on one end surface 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 chamfering. The handle member 3 for turning operation is drawn toward the shaft member 1 side 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. 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 protruding outward from the outer peripheral edge at one end of the shaft member 1. In addition, the other end edge of the outer peripheral flank 22 in the chamfering blade portion 2A of the chamfering bit 2 is in a state of being entirely immersed inward 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 rotating operation handle member 3 is provided with a cutting waste discharging hole 31 extending between both surfaces thereof. The end 20 of the chamfering cutting 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 opening inner peripheral end of the tube P is continuously chamfered by the chamfering blade portion 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 cutting edge 2A of the chamfering bit 2 is relatively inward of the chamfering cutting edge 2A of the chamfering bit 2. Move backwards.
[0031]
The cutting waste B that has moved to the inside 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 discharge 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 portion 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 exchanging 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 the substantially triangular prism-shaped one end portion 11 ′ having a certain length is connected to the other end portion of the truncated triangular pyramid shape having the other end surface of the one end portion 11 ′ as the bottom surface. 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 circular shape) 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 opening end of the tube P, the shaft member 1 ′ is centered on the shaft core. 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 the inner peripheral end portion of the opening of the tubular body, and is inserted into the opening end portion of the tubular body so as to be rotatable in the circumferential direction. A shaft member and a chamfering blade portion, which is detachably attached to one end surface of the shaft member and has a front end portion of a side plate having a vertically long rectangular shape cut out in a substantially L-shaped side surface, is attached to the outside of the shaft member. A chamfering tool protruding outward from the peripheral edge, and
The rotating operation handle member is mounted on one end surface of the shaft member via the chamfering tool, and a cutting waste discharging hole penetrating between both end surfaces is provided in the rotating operation handle member. , the chamfered byte-side opening end of該切Kezukuzu discharge hole with which to face the chamfered blade section, the direction of the rake face of the chamfered blade section cutting chips are discharged to the chip discharge hole side since, characterized in that formed on the inclined surface inclined obliquely rearward toward one end from the other end, the cutting chips generated by the chamfering blade section of the chamfer bytes chamfering the open end of the tube The chamfering edge of the chamfering blade part leads out to the cutting waste discharge hole side of the rotating operation handle member and smoothly discharges it to the outside of the tube, and chamfering work with almost no cutting waste remaining inside the tube. It can be performed.
[0040]
The tubular chamfering device according to claim 2 is configured such that the inner peripheral end of the tubular body can be corrected to a perfect circle shape by the shaft member in the tubular chamfering device according to claim 1. Therefore, it is possible to correct the deformation of the open end of the tube that occurred during cutting and storage of the tube into a round shape at the same time as the chamfering operation, so that the chamfered tube can be used as a pipe joint. The subsequent work can be performed smoothly by connecting with high accuracy.
[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]
1 Shaft member 2 Chamfering tool
21 Rake face
22 Flank
23 Chamfer
2A Chamfering blade 3 Handle member for rotating operation
31 Cutting waste discharge hole

Claims (2)

A tube chamfering device for chamfering the inner peripheral end of the opening of the tube,
A shaft member that is rotatably inserted into the opening end of the tubular body in the circumferential direction;
A chamfering blade portion, which is detachably attached to one end surface of the shaft member and has the front end portion of the plate-like body having a vertically long side surface cut into a substantially L-shaped side surface, is removed from the outer peripheral edge portion of the shaft member. A chamfering tool that protrudes toward the
It consists of a handle member for rotation operation mounted on one end surface of the shaft member via the chamfering tool,
Provided through the chip discharge hole over between both end faces in the rotating operation handle member, with which to face the chamfered blade section chamfered byte-side opening end of該切Kezukuzu discharge hole, The rake face of the chamfering blade portion is formed into an inclined surface inclined obliquely rearward from the other end toward the one end in the direction in which cutting waste is discharged to the cutting waste discharging hole side,
The rotating operation handle member is rotated around the shaft member, and cutting waste generated when the chamfering blade portion of the chamfering tool cuts the inner peripheral end of the opening of the tube body is cut by the rotating operation handle member. A tube chamfering device characterized in that the tube is discharged from the waste discharge hole to the outside of the tube. 2. The tubular body chamfering device according to claim 1, wherein the inner circumferential end of the tubular body can be corrected to a perfect circle shape by the shaft member.

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