JPH06555A - Device for working end of tube - Google Patents

Abstract

PURPOSE:To expand the diameter of the end of tube by using a small working jig with small driving force and small noise. CONSTITUTION:This device is provided with a main shaft 23 having a working jig 25 of a prescribed shape entering inside the inner diameter of the tube end of a tube to be worked P, a body housing 11 holding a main shaft movably in the tube radius direction, a counter member 81 which is fixed to the body housing and receives the reaction force caused by pressing the outer circumferential part of the tube end from the opposite side of the working jig, driving mechanisms 41, 43 which drive the main shaft provided on the body housing in the tube radius direction, and stopper means 61, 75 which control the moving quantity in the radius direction of the main shaft, and the diameter of the tube end is expanded by moving the working jig inserted inside the tube end in the tube radius direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe end machining device for machining the tip of a pipe into a predetermined shape, and more particularly to a motor driven electric pipe end machining device. For example, when connecting a pipe to another pipe or a pipe connector, flare processing is performed to expand the pipe end from the inner diameter side into a mortar shape in order to form a large diameter portion for preventing the cap nut from coming off.

[0002]

2. Description of the Related Art Conventional flare tools, whether electric or manual, generally use an eccentric cone (eccentric cone) rotatable relative to a pipe to be processed, while rotating the eccentric cone relatively. The tube end is expanded into a mortar-like shape corresponding to the base surface of the eccentric cone by pressing the tube end inner circumference and pushing it in the tube axis direction. If the entire circumference of the mother surface of the cone contacts the inner circumference of the pipe at once, an excessive driving force will be applied,
By using an eccentric cone that is eccentric with respect to the tube axis as described above, the tube end can be smoothly expanded little by little with a small force (eg, JP-A-3-268827).

[0003]

However, when the eccentric cone is used as described above, not only the mounting structure and the driving force transmission mechanism become complicated, but also vibration noise is unavoidable. Further, the eccentric cone needs to have a diameter larger than the diameter of the pipe because the mother surface of the eccentric cone needs to be slidably contacted with the inner circumference of the pipe end, and thus a large driving force is required. All of the conventional flare tools are based on the idea of pressing the cone against the pipe end from the pipe axis direction, but the present invention uses a small cone (working jig) that fits snugly into the pipe end. The above-mentioned problems are solved by proposing a pipe end processing device based on a completely novel concept of moving the pipe end in a radial direction to expand the pipe end. Incidentally, in the present invention, the pipe end can be expanded into a shape corresponding to the processing jig by using a processing jig having a predetermined shape instead of the cone, and therefore the flare processing will be described as an example in the following embodiments. However, the present invention is not limited to this, and is applicable to general diameter expansion processing of pipe ends.

[0004]

In order to achieve the above object, a pipe end machining apparatus according to the present invention comprises a spindle having a machining jig of a predetermined shape which is inserted into the inner diameter of the pipe end of a pipe to be machined, A main body housing that holds the main shaft movably in the pipe radial direction, a counter member that is fixed to the main body housing and that receives the reaction force by pressing the outer peripheral portion of the pipe end from the opposite side of the processing jig A drive mechanism for driving the main spindle in the pipe radial direction and a stopper means for restricting the radial movement amount of the main spindle, and by moving the machining jig inserted in the pipe end in the pipe radial direction, Is characterized in that the diameter is expanded to a predetermined shape (claim 1).

The spindle is rotatably supported in a spindle casing which is slidably held in the main body housing (claim 2). The main body housing has a mounting portion for a machine tool having a rotary spindle, and the machining jig is centered on the mounting portion and facing the pipe to be processed mounted on the rotary spindle of the machine tool. It is rotatable between the retracted non-processing position (claim 3). The drive mechanism is constituted by a feed screw shaft mechanism that is a combination of a nut member rotatably supported in the main body housing and a screw shaft screwed onto the nut member and movable in its own axial direction. It is connected to one end of the screw shaft (claim 4).

Preferably, the nut member is provided with an actuating member for rotating the nut member (claim 5). The counter member is formed by a disc having a groove corresponding to the diameter of the pipe to be processed, and a plurality of grooves corresponding to a plurality of pipe diameters can be formed around the disc ( Claims 6 and 7). Alternatively, the counter member may be composed of at least a pair of rollers positioned on both sides of the pipe axis when viewed in the cross-sectional direction of the pipe to be processed (claim 8). Preferably, the stopper means is formed by a stopper pin in the form of an adjusting bolt fixedly mounted on the main body housing, whereby the radial movement amount of the main shaft can be adjusted (claims 9 and 10). According to another embodiment, the stopper means is composed of a plurality of stopper pins fixed to a switching knob rotatably attached to the main body housing and having different projecting lengths. The amount of radial movement of the can be adjusted (claim 11).

It is also possible to additionally provide a first locking means for intermittently locking the switching knob at a predetermined rotational position (claim 12). Preferably, a guide member for moving the main shaft casing relative to the main body housing in the axial direction to extract the processing jig from the pipe end is attached.
3). According to another embodiment, the guide member is provided with a second locking means for selectively fixing the spindle casing to the body housing (claim 14). As the processing jig, in addition to the cone, a rod having a uniform cross section, a rod having an outer peripheral protrusion, a corrugated rod, or the like can be used (claims 15 and 16).

[0008]

The processing jig is inserted into the inside diameter of the rotating pipe to be processed, and the main shaft is moved in the pipe radial direction by the drive mechanism so that the processing jig pushes the pipe end to expand it. At this time, the reaction force of the jig is supported by the counter member that presses the outer peripheral portion of the pipe end from the opposite side, so that the bending of the pipe is prevented.
Since the amount of radial movement of the main shaft is regulated by the stopper means, the flare angle can be reliably set to a desired value in the case of flare processing, for example. The main body housing is attached to a machine tool having a rotary spindle, and is rotatable about the mounting portion. As a result, at the time of diameter expansion processing, the jig is brought to the processing position facing the pipe to be processed attached to the rotary spindle of the machine tool, and when not in use, it is largely retracted from the pipe to be processed, and other machining of the machine tool ( Reaming, chamfering, etc.)

The drive mechanism is most simply constituted by a feed screw shaft mechanism which is a combination of a nut member and a screw shaft, which is known per se, and the main member casing is rotated in the pipe radial direction by rotating the nut member by an operating member. Can be driven. Most simply, the counter member is composed of at least a pair of counter rollers, but it can also be composed of a disc having a plurality of concave grooves corresponding to a plurality of types of pipe diameters. By rotating, the concave groove can be selected according to the diameter of the pipe to be processed. That is, it is possible to perform predetermined diameter expansion processing (flare processing, etc.) on pipes of several kinds of diameters. The amount of diameter expansion (eg flare angle) is determined by the amount of radial movement of the processing jig set by the stopper means. The stopper means can be realized by either a stopper pin in the form of an adjusting bolt or a plurality of stopper pins having different protruding lengths.

When the device is returned to the retracted position after processing, it is necessary to pull out the processing jig from the pipe. In this case, generally, the pipe may be moved in the opposite direction, but for example, a cap nut may be attached to the end of the pipe and it may not be possible to extract it from the spindle chuck of the machine tool in the opposite end direction. . Alternatively, the device may be displaced in the direction away from the pipe, but this may be difficult due to space limitations. In such a case, a guide member for moving the spindle casing in the axial direction with respect to the main body housing and withdrawing the working jig from the pipe end is provided so as to be convenient in such a case.

[0011]

Embodiments of the present invention will now be described in detail with reference to the drawings. 1 to 4 show an embodiment in which the present invention is applied to flare processing. In the figure, a slide block 13 having a rectangular contour is provided in a main body housing 11 formed of a hollow frame in a direction orthogonal to the axis of the pipe P (FIGS. 1 and 6), that is, in FIG. It is movably held in the direction (radial direction of the pipe). The front and rear surfaces (left and right in FIG. 1) of the slide block 13 are sandwiched by the first and second end plates 15 and 17 fixed to the main body housing 11. Therefore, the slide block 13 moves up and down between the end plates 15 and 17.

A substantially cylindrical main shaft casing 19 is integrally mounted in the circular center opening of the slide block 13. A main shaft 23 having a cone 25 at its tip is rotatably held in the main shaft casing 19 via a bearing 21. The tip cone 25 of the main shaft 23 is the main shaft casing 19
The size is such that it protrudes forward from the inside of the pipe to be processed P and fits entirely inside. That is, the diameter is much smaller than that of the conventional cone. The cone 25 has a mother surface having a predetermined cone angle, and is flared (expanded) into a mortar shape corresponding to the cone as shown by F at the tip of the pipe P (described later).

A knob mounting plate 29 having an operating knob 27 (second operating knob) fixedly mounted on the rear end surface (right end surface in FIG. 1) of the main shaft casing 19 is fixed by bolts 31. As shown in FIG. 1, the main shaft casing 19 slidably penetrates the coaxial center openings of the slide block 13 and the end plates 15 and 17. That is, by pulling the knob 27 to the right in FIG. 1, the spindle casing 19 is pulled out in the same direction. In order to guide the pulling-out movement, a guide groove 31 is formed in the spindle casing 19 as shown in an enlarged view in FIG.
The guide groove 31 is a straight groove portion 31a extending in the tube axis direction.
And a lock groove portion 31b bent at a right angle thereto.

On the other hand, a lock pin 33 (second lock pin) fitted in the guide groove 31 is fixedly provided on the second end plate 17,
Normally, the pin 33 is fitted in the lock groove portion 31b to prevent the spindle casing 19 from moving in the axial direction. When the main shaft casing 19 is rotated together with the knob mounting plate 29 by the operation knob 27 about the shaft center of the main shaft 23 (FIG. 5).
(In the direction of the arrow), the immovable lock pin 33 has a straight groove portion 31.
As a result, the main shaft casing 19 can be pulled out to the right in FIGS. The lock pin 33 and the lock groove portion 31b constitute second lock means (the first lock means will be described later). The guide groove 31 also functions as a guide member for the axial movement of the spindle casing 19. The reason why the spindle casing 19 can be moved in the axial direction will be described later.

The lower end (plate-shaped portion) of the screw shaft 41 constituting the feed screw shaft mechanism is fixed to the upper end of the slide block 13 by a bolt 45. The screw shaft 41 extends vertically in the play hole 12 formed in the main body housing 11 and can move up and down with respect to the main body housing 11 but cannot rotate. The screw shaft 41 is screwed into a nut member 43 fixedly installed in the main body housing 11, and as a result, when the nut member 43 rotates, it can move in the vertical direction. As an operating member for rotating the nut member 43, a first operating knob 47 is fixed to the nut member 43 with a set screw 49. The operation knob 47 has an operation knob 47.
A handle 51 is fixed so that an operator can easily grab and rotate this when rotating. Reference numeral 53 is a thrust bearing interposed between the operation knob 47 and the main body housing 11.

Thus, by rotating the operation knob 47 while holding the handle 51, the nut member 43 rotates, and as a result, the feed screw shaft 41 moves up and down as described above, whereby the slide block 13, The main shaft 23 and thus the cone 25 can be moved up and down together with the main shaft casing 19. As is clear from the above explanation,
The feed screw shaft mechanism constitutes a drive mechanism of the main shaft 23, and hence the cone 25, in the pipe radial direction (vertical direction).

The main body housing 11 includes a main shaft casing 1
9. Therefore, the stopper pin 61 as a stopper means for restricting the vertical movement amount of the main shaft 23 is attached via the switching knob 63. The switching knob 63 is rotatably fitted on the outer periphery of the shaft pin 71 fixed to the main body housing 11, and at least one, preferably a plurality (for example, three or four) of the stopper pins 6 are attached to the switching knob 63.
1 are mounted radially at a predetermined angular interval (see the leftmost diagram in FIG. 3). Therefore, by rotating the switching knob 63, the desired stopper pin 61 can be intermittently brought to the working position, for example, the downward position shown in FIG. In order to prevent the rotation of the switching knob 63 except when switching, the switching knob 63 has a main body housing 11
Pin hole 67 to be fitted into the first lock pin 65 fixed to the
Is formed. That is, the switching knob 63 has pin holes 67 corresponding to the stopper pins 61 formed at positions corresponding to the stopper pins 61, and by inserting any one of the pin holes 67 into the first lock pin 65, The corresponding stopper pin 61 is located at the working position.

Reference numeral 73 is a shaft pin 71 and a switching knob 63.
2, which is a compression spring, always urges the switching knob 63 to the left toward the initial position (the position where the left end surface of the switching knob 63 contacts the main body housing 11) in FIG. The stopper pin 61 projects radially from the switching knob 63 in the radial direction, and is in the form of an adjusting bolt whose amount of projection can be arbitrarily adjusted. Thereby, for example, by making the protruding lengths of the three stopper pins 61 different from each other, various intervals L (FIG. 2) with the dog 75 fixedly mounted on the slide block 13 can be set. The amount of movement of the slide block 13 due to clogging is uniquely determined by the distance until the dog 75 comes into contact with the stopper pin 61. Therefore, by making the distance L different, the amount of vertical movement of the main shaft casing 19, and hence the main shaft 23. You can set several types.

As shown in the leftmost drawing of FIG. 3, the dog 75 projects from the elongated hole 14 formed in the main body housing 11 and can move within a predetermined range only in its longitudinal direction.
As a matter of course, the stopper pin 61 is located right above the dog 75 in its operating position, and the slide block 1
Abutment is possible when 3 is raised. Further, since the stopper pin 61 itself can be adjusted as described above, only a single stopper pin 61 may be provided and the amount of protrusion thereof may be adjusted as necessary. In that case, the switching knob 63 may be a mere protrusion fixed to the main body housing 11 (that is, the rotating mechanism and the locking mechanism of the switching knob are unnecessary). It should be understood that the dog 75 is not limited to the slide block 13 and may be attached to the main shaft casing 19, the main shaft 23, etc. as long as it moves up and down together with the slide block 13.

As a counter member when flaring with the cone 25, the main body housing 11 is provided with a disk 81 which receives a reaction force from the outer peripheral side of the pipe P. The disc 81 is rotatably attached to the lower end of a support arm (bracket) 83 having an L-shaped cross section shown in FIG. 1, which is fixed to the main body housing 11 with a shaft pin 87. That is, the shaft pin 87 extends through the disc 81 and the lower ends of the support arms 83,
The E-ring 89 is used for the support arm 83, and the disc 8
With respect to 1, the expansion heads 87a respectively prevent them from coming off.

At least one, preferably a plurality of arcuate grooves 91 are formed on the peripheral surface of the disk 81. Groove 9
The number of 1 corresponds to the number of kinds of diameters of the pipe P to be processed, and in the illustrated embodiment, three concave grooves 91A, 91B, 91C are formed. In FIG. 1, two types of pipes P and P'having different diameters are shown. The arcs of the grooves 91A, 91B, 91C correspond to the diameters of the corresponding tubes. As shown in FIG. 2, by rotating the disc 81, any of the concave grooves 91A, 91B, 91C can be selectively brought into contact with the outer periphery of the set pipe P (in FIG. 2, the concave groove 91A is a pipe). Contact).

On the surface of the disk 81, there are formed a small number of positioning grooves 93 equal to the number of the grooves 91, while on the support arm 83, a single spring-loaded ball is provided at a position corresponding to the positioning grooves 93. Plunger 95 is formed. As is well known, the positioning groove 93 and the ball plunger 95 form a positioning mechanism, and one of the positioning grooves 93 snaps into the ball plunger 95 corresponding to the position of the groove 91. Thereby, each concave groove 91 can be intermittently positioned at the position of the concave groove 91A shown in FIG. The ball plunger 95 is easily disengaged from the positioning groove 93 by rotating the disc 81 with a force of a predetermined value or more. The disc 87 is made of, for example, a resin material.

In the above embodiment, the pipe P slides and rotates with respect to the fixed (non-rotating) disk 81 during flare processing. Therefore, there may be a problem that the groove 91 is worn out. Therefore, FIGS. 7 and 8 show another embodiment of the counter member. In the figure, the parts other than the counter member are the same as those in the first embodiment, and the same reference numerals are given to omit duplicate explanation. In this embodiment, the counter member is formed by a pair of counter rollers 101A and 101B. These counter rollers 101A and 101B are provided with nuts 103A and 1A at the lower end of a support plate 84 attached to the bracket 83.
It is rotatably held by shafts 105A and 105B fixed by 03B. The support plate 84 has a long hole 86 formed therein.
Pin 8 with enlarged head nut fixed to bracket 83 inside
By inserting 8, it is movably attached in the vertical direction. That is, in the case of the disc 81 shown in FIG.
Although different tube diameters are dealt with by 91B and 91C, the same purpose is achieved by adjusting the vertical position of the support plate 84, and thus the counter rollers 101A and 101B in the embodiment shown in FIGS. is doing.

A mounting shaft 20 for mounting on a machine tool is formed in the main body housing 11. FIG. 6 shows a state in which a commercially available thread cutting machine 150 is used as a machine tool and the flare processing apparatus 10 of the present invention is attached thereto. Die head 158 (see FIG. 4,
A pair of parallel guide rods 153 for movably guiding 6) in the axial direction are fixed to the machine body 152. The mounting shaft 20 is for mounting in a corresponding mounting hole (not shown) formed in the die head. Therefore, if the flare processing device 10 is attached to the one end side of the die head 158 of the machine tool via the attachment shaft 20, the flare processing device 10 is rotatable around the axis of the attachment shaft 20, and the entire flare processing device is a pipe. It is possible to selectively take two positions, a processing position facing P and a non-processing position where the entire apparatus is largely retracted from the pipe P.

The pipe P is a spindle chuck 15 of a machine tool.
1 and is rotated by its built-in motor (not shown). It is convenient to use a commercially available machine tool as the rotation drive source for the pipe P, but the present invention is not limited to this, and the pipe P may be rotated by any means.

The flare processing is performed as follows. The following description will be made by taking the first embodiment as an example, but the same applies to the embodiments shown in FIGS. Furthermore, since the present invention does not ask for the procedure (processing method) of flare processing, before and after the following working procedure is not a significant problem. In the flare processing, first, the flare processing device 10 is attached to the die head of the threading machine, the operation knob 47 is rotated by the handle 51 to move the slide block 13 up and down, and the main shaft 23 is positioned at the machine center (pipe axis). Next, the disk 81 is rotated to select the concave grooves 91A, 91B, 91C according to the diameter of the pipe P. At the same time, the operation knob 63 selects the stopper pin 61 (sets the distance L). The main shaft 23 is assumed to be in a processing position shown in FIG. 1 in advance, that is, a position where the cone 25 projects forward.

Then, the pipe P to be processed is set on the chuck 151 of the thread cutting machine 150, and the tip of the pipe is set to the spindle casing 1.
Press on 9. At this time, the tip of the cone 25 is completely inside the pipe P. Then, with the tube P rotated by the chuck 151, the operation knob 47 is rotated by the handle 51 to move the slide block 13 upward. The operation knob 47 is rotated by the handle 51 until the dog 75 comes into contact with the stopper pin 61 and cannot move any further. As a result, the cone 25 is raised while making contact with the inner diameter of the pipe P, and the tip of the pipe P is subjected to desired flare processing.

When the flaring process is completed, the operating knob 47 is reversed by the handle 51 and the spindle is lowered to the position of the machine center. With this, the chuck 151 can be loosened and the pipe P can be pulled out in the left direction in FIG. 6, but when the pipe P is long or when the tip of the pipe P cannot be passed through the inside of the chuck 151 due to the attachment of a screw nut or the like. There is. In such a case, the flare processing device 10 may be shifted to the right in FIG. However, the flare processing device 10
If the cone 25 can be pulled out from the pipe P without moving the whole, the device can be raised to the retracted position. Therefore, in the present invention, the main shaft 23 can be easily slid to the right in FIG. 1 by rotating the operation knob 27 (removing the lock pin 33 from the lock groove portion 31b) and pulling it out to the right in FIG. .

FIG. 9 shows three examples of processing jigs.
Instead of the cone 25 described above, a round bar 25A is attached to the tip.
23A (a in the same figure) having a round bar 25 with a protrusion at the tip
A main shaft 23B having B (the same figure b) and a main shaft 23C having a corrugated rod 25C at the tip (the same figure c) are respectively shown.
By appropriately exchanging these spindles, the pipe end can be subjected to simple parallel diameter expansion, inner diameter grooved diameter expansion, and corrugated inner diameter groove added diameter expansion processing, respectively. In the present invention, thus, the pipe end can be subjected to diameter expansion processing of any shape.

In the illustrated embodiment, the spindle 23 (23A,
23B, 23C), that is, the processing jig 25 (25
A, 25B, 25C) is a combination of a dog 75 and a stopper pin 61 as a means for setting the amount of expansion of the pipe end. However, for example, a microswitch or limit switch known per se is used instead of the stopper pin. It is also possible to achieve automation of the processing equipment. In this case, the limit switch may be provided in the immovable portion of the main body, and may be hit by the dog when the processing jig moves by a predetermined amount. The stop position can be set in multiple stages by providing a plurality of limit switches.

As described above, the present invention does not matter what kind of machine tool is used, and since it suffices that it can be used as a drive source for rotating the pipe P to be processed, the chuck 151 has been generally used conventionally in a lathe or the like. For example, a three-point claw type may be used. However, depending on the pipe P, particularly in the case of a stainless pipe or the like, there is a case that the outer surface of the pipe P is disliked to be gripped by the nail. Therefore, FIGS. 10 to 12 show a clamp method that does not use a claw.

10 to 12, the chuck device 1
51 is a pair of openable clamp arms 161a, 161b
The tube P can be firmly gripped by sandwiching the tube P between the clamp arms 161a and 161b and tightening the tightening bolt 163. Clamp arm 1
61a and 161b are hinge pins 165a and 16a, respectively.
5b, it is rotatably (openly) attached to the first holder plate 167. Reference numeral 169 is a link bridged between the hinge pins 165a and 165b in order to prevent both clamp arms 161a and 161b from coming apart during assembly.

The first holder plate 167 is sandwiched between the second and third holder plates 171 and 173. The first holder plate 167 is usually the second and third holder plates 1
71, 173 can rotate integrally, but when a resistance (load) of a predetermined value or more is applied, the second and third holder plates 17
It is mounted by fitting so as to cause relative slip between 1 and 173 (the reason will be described later). Second holder plate 17
1 is fixed to the spindle 170 of the machine tool with bolts 175, and the third holder plate 173 is fixed to the second holder plate 171 with bolts 177. Therefore,
Second holder plate 171 and third holder plate 173
Rotates integrally with the spindle 170 of the machine tool.

The eccentric pin 1 is attached to the third holder plate 173.
81 is fixed by the bolt 183. Eccentric pin 181
As is clear from FIG. 12, the clamp arms 161a, 161
For example, it projects above b and contacts the clamp arm 161a.
Therefore, the rotation of the third holder plate 173 is transmitted to the clamp arms 161a and 161b via the eccentric pin 181. As shown in FIG. 10, the pipe P has a clamp arm 161.
It is clamped by a and 161b and is free with respect to the first holder plate 167 and the second holder plate 171.

The first holder plate 167 is usually the second,
It is possible to rotate integrally with the third holder plates 171 and 173, but when a certain amount of load is applied, relative sliding is caused between the second and third holder plates 171 and 173 for the following reason. . That is, the tightening bolt 163 does not always face upward at the end of pipe end processing. As shown in FIG. 6, the chuck 151 of the processing machine
Generally, there is no extra space for inserting a hand below, so that, for example, when the spindle rotation ends with the tightening bolt 163 facing downward, the clamp arms 161 a, 1
It is not possible to loosen the tightening bolt 163 for opening 61b. Therefore, in such a case, if the first holder plate 167 is manually rotated with a certain amount of force, the second and third holder plates 167 are rotated.
Sliding rotation can be caused between the holder plates 171 and 173. That is, by rotating the first holder plate 167, and thus the clamp arms 161a and 161b, for example, to a position where the tightening bolt 163 is located above, the tightening bolt 163 can be loosened and the clamp arms 161a and 161b are opened. Pipe P can be removed.

[0036]

As described above, according to the present invention,
By using a small coaxial cone that fits snugly inside the pipe to be processed without using an eccentric cone, it is possible to perform a desired flaring process on the pipe end with a small driving force and with reduced noise. Further, by using a processing jig other than the cone, the pipe end can be subjected to arbitrary diameter expansion processing.
Further, if the pipe to be processed is rotated by using the existing machine tool, the rotating mechanism of the processing jig is unnecessary, and the pipe end processing device can be realized with an extremely simple configuration.

[Brief description of drawings]

FIG. 1 is a front sectional view of a flare processing apparatus according to an embodiment of the present invention.

FIG. 2 is a left end view of FIG.

FIG. 3 is a right end view of FIG.

FIG. 4 is a plan view of FIG.

FIG. 5 is an enlarged view of arrow A in FIG. 1 showing a guide groove formed in the spindle casing according to the present invention.

FIG. 6 is a front view showing a state in which the flare processing apparatus according to the embodiment of the present invention is attached to a thread cutting machine as an example of a machine tool.

FIG. 7 is a front view corresponding to FIG. 1, showing another embodiment of the counter member.

FIG. 8 is a left end view of FIG.

FIG. 9 is a diagram showing three examples of processing jigs used in the present invention.

FIG. 10 is a longitudinal sectional view showing a specific example of the structure of the spindle chuck.

11 is a right side view of FIG.

12 is a plan view of FIG.

[Explanation of symbols]

 10 ... Flare processing device 11 ... Main body housing 13 ... Slide block 19 ... Main shaft casing 20 ... Attachment shaft 23 ... Main shaft 25 ... Cone 41 ... Feed screw shaft 43 ... Nut member 61 ... Stopper pin 75 ... Dog 81 ... Disc

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Masaaki Maruyama Inventor Masaaki Maruyama 3 in 8 Sanbongi, Seika-cho, Soka-cho, Kyoto Prefecture (72) Inventor Yoshito Fujita 2-25 Shinsei-Komadai, Ikoma-shi, Nara Pref. 203

Claims (16)

[Claims] 1. A spindle (2) having a processing jig (25) of a predetermined shape which is inserted into the inner diameter of the pipe end of the pipe to be processed (P).
3), a main body housing (11) that holds the main shaft movably in the pipe radial direction, and a counter that is fixed to the main body housing and presses the outer peripheral portion of the pipe end from the opposite side of the processing jig to receive the reaction force Members (81, 101A, 101B), drive mechanisms (41, 43) provided in the main body housing for driving the spindle in the pipe radial direction, and stopper means (61, 75) for regulating the radial movement amount of the spindle. And a pipe end processing apparatus which processes a pipe end into a predetermined shape by moving a processing jig inserted in the pipe end in a pipe radial direction. 2. The processing apparatus according to claim 1, wherein the spindle is rotatably supported in a spindle casing that is slidably held in a main body housing. 3. The main body housing has a mounting part (20) to a machine tool (150) having a rotary spindle, and a machining jig is mounted on the rotary spindle of the machine tool around the mounting part. The processing device according to claim 1, wherein the processing device is rotatable between a processing position facing the processing pipe and a non-processing position retracted from the pipe to be processed. 4. The drive mechanism comprises a combination of a nut member (43) rotatably supported in the main body housing, and a screw shaft (41) screwed to the nut member and movable in its own axial direction. The processing device according to claim 2, wherein the processing device is configured by a feed screw shaft mechanism, and the main shaft casing is connected to one end of the screw shaft. 5. The processing apparatus according to claim 4, wherein the nut member is provided with an operating member (47) for rotating the nut member. 6. The processing apparatus according to claim 1, wherein the counter member is formed by a disk (81) having a groove (91) corresponding to the diameter of the pipe to be processed. 7. A disk constituting the counter member has a plurality of concave grooves (91) corresponding to a plurality of kinds of pipe diameters around the disk.
A, 91B, 91C) and is rotatably supported by a bracket (83) extending from the main body housing so that one of the recessed grooves can be selected. The processing device described. 8. The counter member is composed of at least a pair of counter rollers (101A, 101B) located on both sides of the pipe axis when viewed in the cross-sectional direction of the pipe to be processed. The processing device described. 9. The processing apparatus according to claim 1, wherein the stopper means is formed by a stopper pin (61) fixed to the main body housing. 10. The processing apparatus according to claim 9, wherein the stopper pin is composed of an adjusting bolt (61), and thereby the amount of radial movement of the spindle can be adjusted. 11. A plurality of stopper pins (61) having different projecting lengths fixed to a switching knob (63) rotatably attached to the main body housing.
2. The machining apparatus according to claim 1, wherein the amount of radial movement of the main shaft can be adjusted by selectively using these stopper pins. 12. The processing apparatus according to claim 11, further comprising first locking means (65, 67) for intermittently locking the switching knob at a predetermined rotation position. 13. The guide member (33, 31) according to claim 1, further comprising a guide member (33, 31) for moving the main shaft casing relative to the main body housing in the axial direction thereof to extract the processing jig from the pipe end. Processing equipment. 14. The processing apparatus according to claim 13, wherein the guide member is provided with second locking means (31b, 33) for selectively fixing the main shaft casing to the main body housing. . 15. The processing apparatus according to claim 1, wherein the processing jig is a cone. 16. The processing apparatus according to claim 1, wherein the processing jig is a bar material having a predetermined sectional shape.