JPH0663651A - End part working method for pipe - Google Patents

Abstract

PURPOSE:To provide an end part working method for a pipe by which the end part of pipe is worked to be collar-shaped outward regardless of the length of pipe very easily in a short time. CONSTITUTION:In a first process, working margine setting members 2A and 2B are mounted on the end outer circumference of a pipe 1. In a second process, the end part of a pressurizing rotating body 10 provided with a bar-shape rotating pressurizing member 11 freely rotating opposing the end opening part of the pipe 1 is arranged in an inclined state toward the inside of the pipe 1 and the side face of end part of the rotating body 10 is abutted on the end part of the pipe 1 from inside. In a third process, almost simultaneously with the second process, while whole the body of rotating body 10 is rotated along the end part circumference of the pipe 1 centering the axial center of the pipe 1 maintaining the inclination to the end part of the pipe 1, an external force along the axial direction of the pipe 1 is applied to the end circumference of the pipe 1 with the pressurizing rotating body 10.

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 method, and is particularly suitable for expanding an end outer circumference of a pipe made of a relatively hard metal such as stainless steel toward the outside. The present invention relates to an end processing method for a pipe.

[0002]

BACKGROUND ART Terminal processing of pipes is routinely carried out in factory work or construction site work as the building's cooling and heating facilities and water and sewage systems are upgraded. On the other hand, pipes made of stainless steel or the like used for building air conditioning equipment (air conditioning equipment) are required to be equipped with a clamp for connection when connecting to air conditioning equipment or connecting pipes. It is necessary and necessary to form a flange. Conventionally, this type of pipe end processing is performed by forming a flange on the end of a relatively short pipe in advance by factory production, or by using a relatively large dedicated pipe end processing machine on site. The flange is formed directly at the end of the.

[0003]

However, when the short pipe with a flange produced by the factory of the above-mentioned conventional example is used, welding for joining the short pipe with a flange to an ordinary pipe is performed on site. There is an inconvenience that work is required, which is troublesome and troublesome. Further, in the case of using the dedicated pipe terminal processing machine of the above-mentioned conventional example, most of the processing machines of this type are theoretically manufactured by the two-stage or three-stage press processing technique, which is inevitable. In addition, the whole apparatus becomes large in size, and since it is a press working, the working time is long and the productivity is poor, which causes a problem that the labor cost rises.

[0004]

It is an object of the present invention to improve the disadvantages of the prior art, and in particular, the outer circumference of the end of a hard pipe can be easily and outwardly extended regardless of the length of the pipe. It is an object of the present invention to provide a method for processing an end portion for a pipe that can be rolled.

[0005]

According to the present invention, there is provided a first step of equipping a work margin setting member for setting a work margin on an outer periphery of an end portion of a pipe as a work member, and an end portion of the pipe as the work member. A pressing rotary body having a rod-shaped rotary pressing member that is rotatably provided facing the opening surface is arranged with a predetermined inclination so that its tip end faces the inside of the pipe, and the pressing rotary body is also provided. Second step of bringing the tip side surface of the pipe into contact with the end edge of the pipe from the inside, and, before and after this second step, the pressing rotor is maintained while inclining to the pipe end portion. A whole of which is rotated about the central axis of the pipe along the edge of the pipe, and an external force in a direction along the central axis of the pipe is applied to the edge of the pipe via the pressing rotating body. And the process of It adopts a configuration and the like. This aims to achieve the above-mentioned object.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

In the embodiment shown in FIGS. 1 to 6,
Reference numeral 1 indicates a stainless pipe which is a member to be processed.
Further, reference numerals 2A and 2B indicate processing allowance setting members having flange portions 3A and 3B at ends thereof, and reference numeral 20 is one end of a stainless steel pipe 1 (a member to be processed) via the processing allowance setting members 2A and 2B ( The chuck mechanism which clamps the right end in FIG. 1 is shown. The stainless steel pipe 1, which is a member to be processed, is held by the pipe fixing and supporting mechanism 30 at one end thereof via the chuck mechanism 20 and the above-described processing margin setting members 2A and 2B.

Further, in the embodiment shown in FIGS. 1 to 6, a pressing member is provided with a rod-shaped rotating pressing member 11 which comes into contact with the inner edge of the pipe 1 at a predetermined angle α at one end (the right end in FIG. 1). Rotating body 10 and this pressing rotating body 1
0 rotatably holding the rotating body support case 15, and the rotating body support case 15 is fixedly held and the rotation of the rod 1 with the central axis of the pipe 1 as the center of rotation while maintaining the inclination of the rod-shaped rotation pressing member 11 with respect to the pipe 1. Body support case 15
The rotating body rotation holding mechanism 40 that rotates the whole body along the edge of the pipe 1 is provided.

Further, between the rotary body rotation holding mechanism 40 and the rotary body support case 15, the rotary body support case 15 is provided.
Radius setting mechanism 5 that variably sets the radius of rotation of
0 is equipped. Further, a holding mechanism pressing movement means 60 for sequentially moving the pressing rotating body 10 through the rotating body rotation holding mechanism 40 in a direction along the central axis of the pipe 1 with an appropriate pressing force is provided.

A rod-shaped rotary pressing member 11 of the pressing rotary member 10.
In this embodiment, the other rotation pressing member 1 has the same rotation axis, is rotatably supported by the rotation body support case 15, and has a rotation cross section formed in a bay shape or a skirt shape.
It is planted on the center line of rotation 2. The rod-shaped rotary pressing member 11 and the other rotary pressing member 12 form the pressing rotary body 10 described above.

In principle, the chuck mechanism 20 is the same as the chuck mechanism in a lathe. That is, the chuck mechanism 20 is arranged on the right end surface of the disk-shaped rotary body 5 in FIG. 1 at equal intervals and radially with respect to the central axis of the rotary body 5, and is slidable along the radial direction. It is configured to include one chuck member 4 and a fixing screw 4A for fixing the sliding position of the chuck member 4. Here, the chuck members 4 are slid by the same amount in synchronization with each other via a bevel gear mechanism (not shown).

Reference numeral 30 indicates a pipe fixing and supporting mechanism. The pipe fixing / supporting mechanism 30 includes a base 8, a tubular body 6 supported by the base 8, and the above-mentioned chuck mechanism 20 supported by the tubular body 6.
More specifically, the tubular body 6 is provided at its one end (the right end in FIG. 1) with a main body flange portion 5 for guiding and supporting the operation of the chuck mechanism 20 described above. Further, on the left end side of the cylindrical body 6, another chuck mechanism (not shown) for holding the pipe 1 is provided.

The work allowance setting members 2A and 2B are formed as shown in FIG. 4, and are attached to one end of the pipe 1 to set the work allowance K and are spread toward the outer circumference as described later. It has a guide function of guiding the extended portion of the edge portion of the pipe 1 in a direction orthogonal to the central axis of the pipe 1. That is, the processing margin setting members 2A and 2B are shown in FIG.
As shown in FIGS. 4 (A) to 4 (B), a cylindrical member is used as a material, and flanges 3A and 3B are formed at one end of the cylindrical member. ing.
Here, as materials of the processing margin setting members 2A and 2B,
A pipe whose inner diameter is the same as or slightly larger than the outer diameter of the pipe 1 is used.

Then, the processing margin setting members 2A, 2B
4A is installed at the end of the pipe 1, the right end edge on the inner diameter side of FIG.
3B exerts a guide function of guiding the bent end of the processed pipe 1 toward the outer peripheral direction in a direction orthogonal to the central axis of the pipe 1. Also, the collar portion 3A,
By making the left end surface of FIG. 4 (A) of 3B abut on the right end surface of the chuck member 4 when the pipe is mounted, the pair of work margin setting members 2A and 2B can be easily aligned with each other. ing.

The pressing rotary member 10 is for processing the end portion of the pipe 1 after the pipe 1 which is the member to be processed is fixed by the tubular member 6 and the chuck mechanism 20 as described above. That is, as shown in FIG. 5, the pressing rotary member 10 includes a rod-shaped rotary pressing member 11 as a conical rod-shaped first pressing portion formed of a relatively hard metal.
And a rod-shaped rotary pressing member 11 that is the first pressing portion is planted in the center of one end surface thereof, and the end surface is formed into a spherical shape (or a bay shape or a skirt shape). The stepped shape consisting of the other rotary pressing member 12 as the pressing part is used. Here, the rod-shaped rotary pressing member 11 has a role of pressing the end surface of the rotating pipe 1 to spread it in a conical shape, and the other rotary pressing member 1
2 has a role of pressing the end portion of the pipe 1 spread by the rod-shaped rotary pressing member 11 toward the collar portions 3A and 3B of the processing margin setting members 2A and 2B.

Thus, the rod-shaped rotary pressing member 11 and the other rotary pressing member 12 having the function of processing the end portion of the pipe 1 are
As shown in FIG. 5, it is attached to one end of the rotary shaft 13 and is integrated with the rotary shaft 13 with the center of rotation being the same to form a rotary assembly 14. The rotary shaft 1 of the rotary assembly 14
3, the rod-shaped rotary pressing member 11 side is rotatably supported by the rotor support case 15 via the radial bearing 13A and the opposite side (right end portion in FIG. 5) via the thrust bearing 13B. . For this reason,
In this embodiment, when the pressing rotary body 10 is pressed against the rotating pipe 1, the pressing rotary body 10 (rotating assembly 1) is pressed.
4) is adapted to rotate following the rotation of the pipe 1.

The rotary body rotation holding mechanism 40 is shown in FIGS.
As shown in FIG. 5, the rotary support shaft 15 and the rotary radius setting mechanism 50 are fixedly installed at one end, and the rotary support shaft 41 is integrally rotated at a high speed.
Supporting body 42 for rotatably supporting the
And a pulley 43 for transmitting a rotational force from the outside. Reference numeral 41A indicates a rotation support plate fixed to the end of the rotation support shaft 41. A turning radius setting mechanism 50 is provided on the left end portion of the rotation support shaft 41 in FIG. 2 via a rotation support plate 41A.

The turning radius setting mechanism 50 includes a rotary support shaft 4
A screw portion 51 which is arranged on a diameter of 1 to support the rotating body support case 15 and transfers it to a predetermined position;
A rotation position setting member 52 screwed into the first transfer member 1, and both end portions of the screw portion 51 are rotatably held and the support shaft plates 53 and 54 for mounting the screw portion 51 on the rotation support shaft 41;
A pair of support plates 53, 54 are arranged in parallel along the threaded portion 51 to transmit the rotational force of the rotary support shaft 41 to the rotating body support case 15 via the above-described rotational position setting member 52. The rotational force transmitting member 55 is included.
Reference numeral 51A indicates a setting position adjusting portion that rotates the screw portion 51 to set the fixed position of the rotation position setting member 52.
Furthermore, at the left end portion of the rotation position setting member 52 in FIG.
A fixing disk equipped with the rotor support case 15 is fixedly installed. Therefore, the set position adjusting portion 5 of the screw portion 51
Through 1A, the fixed position of the rotational position setting member 52 can be appropriately moved, whereby the rotary body support case 15 can be freely moved and fixed to the processing location in accordance with the diameter of the pipe to be processed. ing.

Further, the holding mechanism pressing movement means 60 guides the support shaft holder 42 to reciprocate in the direction along the central axis of the pipe 1 which is the member to be processed and supports the support shaft holder 42. The concave guide frame body 61 and the support shaft holding body 4 described above which is arranged in the concave portion of the concave guide frame body portion 61.
2 and a screw mechanism 62 that applies a reciprocating force. Therefore, the spindle mechanism 42 can be reciprocated in the direction along the central axis of the pipe 1 by operating the screw mechanism 62.

Next, the operation of the embodiment configured as described above and the method of processing the end portion of the pipe 1 which is the member to be processed will be described (see FIG. 6).

First, the working margin setting members 2A and 2B for setting the working margin, which are provided with a collar, are provided at the tip of the outer periphery of the end of the pipe 1 which is the workpiece (first step). At the same time, a pressing rotating body 10 provided with a rod-shaped rotating pressing member 11 that is rotatably provided so as to face the end opening surface of the pipe 1 that is the member to be processed is provided with a predetermined end portion so that its tip end faces the inside of the pipe 1. A rod-shaped rotary pressing member 1 arranged with an inclination
The side surface of the tip portion of No. 1 is brought into contact with the end edge of the pipe from the inside (second step). Then, before and after the second step, the entire rod-shaped rotary pressing member 11 is rotated about the central axis of the pipe 1 along the pipe edge while maintaining the inclination with respect to the pipe end. An external force in the direction along the central axis of the pipe 1 is applied to the edge of the pipe 1 via the rod-shaped rotary pressing member 11 (third step). The steps for processing the end portion of the pipe into a Y-shaped cross section are completed for the time being in the first to third steps.

Subsequently, the end portion of the pipe 1 expanded in a mortar shape by the rod-shaped rotary pressing member 11 is processed by another rotary pressing member 12 having the same rotation method as the rod-shaped rotary pressing member as described above. The margin setting members 2A and 2B are pressed toward the flange portions 3A and 3B to be spread (fourth step). Through the first to fourth steps, the end portion of the pipe 1 is stretched outward.

Next, the specific operation of the apparatus that enables each of the above steps will be described.

The work margin setting members 2A and 2B for determining the work allowance K are provided on the outer periphery of the end of the pipe 1 as the work subject, and the pipe 1 as the work member together with the work allowance setting members 2A and 2B. Is disposed in the cylindrical body 6, and one end thereof is fixed by the three chuck members 4 constituting the chuck mechanism 20 as shown in FIGS. Next, the turning radius setting mechanism 50 is operated via the fixed position adjusting portion 51A, and the rotating body support case 1 is turned on via the turning position setting member 52.
5, the rod-shaped rotary pressing member 1 of the pressing rotary body 10 is moved.
1 is set at a pressure processing position on the outer periphery of the end portion of the pipe 1 as shown in FIG. In this case, the rod-shaped rotary pressing member 11
In the present embodiment, the inclination angle α is set to (for example, α = 30 °
Is set). Before and after the setting of the pressure processing position, the rotating body rotation holding mechanism 40 is made to operate *, and the holding mechanism pressing moving means 60 is operated to move the pressing rotating body 10 to the position shown in FIG.
It is moved in the direction of arrow A shown in (A), and processing of the end portion of the pipe 1 is started. In this case, the pressing rotating body 10 is rotated by being driven by the rotating force of the pipe 1, and the pressing process is continued in a rolling contact state due to the frictional force with the end portion of the pipe 1.

Next, when the end portion of the pipe 1 is processed into the state shown in FIG. 6B, the rotation operation of the rotary body rotation holding mechanism 40 is temporarily stopped in this embodiment, and the rotation radius setting mechanism 50 is used. The pressing rotary body 10 is transferred in the direction of arrow B in FIG. 6B, and the other rotary pressing member 12 of the pressing rotary body 10 is transferred.
The portion is set to the position before processing shown in FIG. Then, the rotating body rotating / holding mechanism 40 and the holding mechanism pressing / moving means 60 are actuated again to perform the pressing process in the state shown in FIG. 6C. Also in this case, the other rotary pressing member 12 part is rotated by being driven by the rotational force of the pipe 1, and the pressing process is continued in a rolling contact state by the frictional force with the end portion of the pipe 1. In FIG. 6 (B), β indicates the angle at which the rotation surface of the rod-shaped rotary pressing member 11 abuts on the inner end edge of the pipe 1 on one end side. The end portion of the pipe 1 on one end side is extended toward the outer peripheral side with a predetermined spread according to the magnitude of β.

The rotational speed of the rotary body rotation holding mechanism 40 is set to 3000 RPM in this embodiment, but this can be changed appropriately depending on the wall pressure and diameter of the pipe 1. In this case, by applying a slight pressing force in the A direction, it is possible to obtain the result shown in FIG.
In the state shown in FIG. 2, that is, the end portion of the pipe 1 is formed with a mortar-shaped opening with an inclination of, for example, β = about 45 ° with respect to the rotation center line L of the pipe 1, and subsequently, by another rotation pressing member 12 The processing shown in FIG. 6C is quickly performed. That is, the pressurizing energy by the collar portions 3A, 3B of the work margin setting members 2A, 2B and the pressurizing portion P of the other rotary pressing member 12 and the rotational energy of the pipe 1 in the rotating state are combined. In an instant, the end of the pipe 1 is flattened toward the outer peripheral direction. In this case, the end portion of the processed pipe 1 is guided by the flange portions 3A and 3B of the processing margin setting members 2A and 2B and spread in the direction orthogonal to the central axis of the pipe 1.

As described above, according to this embodiment,
The pipe 1 that is the member to be processed is fixed.
Since the pressing rotating body 10 abutting on the pressing member is pressed around the pipe 1 while being rotated, it is possible to significantly reduce the size of the entire device as compared with the conventional pipe terminal processing machine using the pressing method. Further, at the start of processing, the pressing rotation body 10 is pressed against the pipe 1 with a predetermined pressing force simply by moving the rotating body rotation holding mechanism 40 to the pipe 1 side by the holding mechanism pressing movement means 60. Since the operation is simple and there is no need to rotate the pipe 1, there is an advantage that any length of the pipe 1 can be handled very easily. Furthermore, since the processing margin setting members 2A and 2B for setting the processing amount (processing margin) of the end of the pipe 1 are used, the pipe 1
There is an advantage that the processing amount of the end portion can be set arbitrarily.

Here, in the above embodiment, the pressing rotary member 1 is used.
Although the case where 0 is installed in one place is illustrated, a plurality of pressing rotating bodies 10 may be incorporated as shown in FIG. 7, for example. Further, in the present embodiment, the case where the rod-shaped rotary pressing member 11 and the other rotary pressing member 12 are integrated, that is, the stepped shape is used as the pressing rotary member 10, is described as an example. As for 10,
The present invention is not necessarily limited to this, and for example, those formed separately and separately equipped may be used. Also,
The rod-shaped rotary pressing member 11 in the pressing rotary body 10,
As the shape of the pressing surface of the other rotary pressing member 12, the above-mentioned embodiments exemplify the case of the conical rod shape and the spherical shape, respectively. However, as described above, the shape of the rod-shaped rotary pressing member 11 is the conical rod shape shown in FIG. 9 may be used as the shape of the pressure surface P of the other rotary pressing member 12.
Alternatively, a skirt-shaped member which changes in a linear shape as a whole may be used as shown in FIG.

Further, in the above-mentioned embodiment, an example in which the processing margin setting member having the collar portions 3A and 3B is used is disclosed, but the processing margin setting member may simply set the Y-shaped opening portion. For example, the processing margin setting members 2C and 2D that do not have the flange portion shown in FIGS. 10A and 10B may be used. Furthermore, in each of the above-described embodiments, the case where the machining allowance setting member is provided independently of the chuck mechanism 20 and two is provided, but the present invention is not limited to this, and the machining allowance setting member is not limited to this. For example, it is possible to integrate the machining allowance setting member and the chuck mechanism 20 by forming a cylindrical material with a collar by dividing it into three parts and integrating each into the respective chuck members 4. In such a case, Has the advantage that the process margin setting member can be attached to the pipe 1 more easily.

Further, in the above embodiment, the pressing rotary member 10 is used.
Although the case where the mounting angle with respect to the pipe central axis is fixed is disclosed, the present invention is not necessarily limited to this. At this time, it is even more convenient to have a structure in which the pressing rotary body 10 can be replaced.

[0031]

Since the present invention is constructed and functions as described above, according to the present invention, since the pipe which is the member to be processed is not rotated, the end of a pipe of any length can be obtained. It becomes possible to process the part toward the outside in a brim shape, and the rolling contact of the pressing rotating body and the rotating pressing force in that part are used, so the processed surface becomes smooth and the pressing rotating body Since the rotational pressing energy of is used, it is possible to instantaneously perform the spreading process toward the outside of the pipe end, and thus the productivity of the process can be significantly improved. It is possible to provide an end processing method for a pipe.

[Brief description of drawings]

FIG. 1 is a partially omitted configuration diagram showing an embodiment of the present invention.

FIG. 2 is a partially sectional front view showing an example of a rotation drive portion for a pressing rotary body in FIG.

FIG. 3 is a left side view of a rotary body rotation holding mechanism and a holding mechanism moving means portion of the embodiment shown in FIG.

FIG. 4 shows an example of the work allowance setting member disclosed in FIG. 2, and FIG. 4 (A) is a sectional view of the work allowance setting member;
FIG. 4 (B) is a right side view of FIG. 4 (A).

FIG. 5 is a partially sectional front view showing a pressing rotary body and a rotary body supporting case portion incorporating the pressing rotary body in FIG. 2;

6 is an explanatory diagram showing the operation of the embodiment shown in FIG.
FIG. 6A is an explanatory view showing the relationship between the rod-shaped rotary pressing member of the pressing rotary body and the pipe end, and FIG. 6B is an explanatory view showing the processing state of the pipe end by the rod-shaped rotary pressing member of the pressing rotary body.
FIG. 6C is an explanatory view showing a processing situation of the pressing rotary body by another rotary pressing member.

FIG. 7 is a schematic configuration diagram showing another embodiment of the present invention.

FIG. 8 is an explanatory diagram showing another example of the shape of the pressing rotating body.

FIG. 9 is an explanatory diagram showing an example of another shape of the pressing rotary body.

FIG. 10 shows another example of the work allowance setting member, and FIG. 10 (A) is a sectional view of the work allowance setting member.
FIG. 10B is a right side view of FIG.

[Explanation of symbols]

 1 Pipes 2A, 2B, 2C, 2D as Worked Members Processing Margin Setting Member 10 Rotating Body for Pressing 11 Rod Rotating Pressing Member as First Pressing Part 12 Other Rotating Pressing Member as Second Pressing Part 15 Rotation Body support case 20 Chuck mechanism 30 Pipe fixed support mechanism 40 Rotating body rotation holding mechanism 50 Rotation radius setting mechanism 60 Holding mechanism Press moving means

Claims (6)

[Claims] 1. A first step of equipping a work margin setting member for setting a work margin on an outer periphery of an end portion of a pipe which is a workpiece.
A pressing rotating body provided with a rod-shaped rotating pressing member that is rotatably provided so as to face the end opening surface of the pipe that is the member to be processed is arranged with a predetermined inclination so that its tip end faces the inside of the pipe. And a second step of bringing the tip side surface of the pressing rotary body into contact with the end edge of the pipe from the inside, and the pressing rotary body is connected to the pipe before and after the second step. While maintaining the inclination with respect to the end portion, the entire body is rotated around the center axis of the pipe along the edge of the pipe, and the external force in the direction along the center axis of the pipe is applied via the pressing rotating body. And a third step of applying it to the edge of the pipe. 2. The method for processing an end portion for a pipe according to claim 1, wherein a plurality of pressing rotating bodies are arranged as the pressing rotating body at equal intervals. 3. A first step for equipping a processing margin setting member for setting a processing margin having a collar portion at a tip end on the outer periphery of a pipe as a processing target member, and a pipe as the processing target member. A pressing rotating body having a rod-shaped rotating pressing member rotatably provided facing the end opening surface is arranged with a predetermined inclination so that its tip end faces the inside of the pipe, and the rod-shaped rotating member is rotated. A second step of bringing the tip side surface of the pressing member into contact with the end edge of the pipe from the inside, and the second step
Before and after the step of (1), the entire rod-shaped rotary pressing member is rotated along the pipe edge while maintaining the inclination with respect to the pipe end, and the rod-shaped rotational pressing member is rotated. A third step of applying an external force in the direction along the central axis of the pipe to the end edge of the pipe through the rod, and the end portion of the pipe expanded by the rod-shaped rotary pressing member into a mortar shape. A fourth step of pressing and spreading the other marginal pressing member of the working margin setting member by another rotating pressing member having the same rotation method as that of the rotating pressing member. Part processing method. 4. The rod-shaped rotary pressing member and the other rotary pressing member are in a form in which the rod-shaped rotary pressing member is coaxially implanted and integrated in the center of the outer end surface of the other rotary pressing member. The method for processing an end portion for a pipe according to claim 3, wherein. 5. The method for processing an end portion for a pipe according to claim 4, wherein the rod-shaped rotary pressing member and the other rotary pressing member are separately provided and used, respectively. 6. The pipe end processing method according to claim 1, wherein the rod-shaped rotary pressing member and the other rotary pressing member are driven rotary bodies, respectively.