JP2018083219A - Bulging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bulging apparatus in which mounting/dismounting work of a die can be easily and quickly performed with small force (a hand of a worker).SOLUTION: The bulging apparatus is provided, comprising an elastic body 66 which is compressed in an axial center direction E in accordance with an actuation of an actuator 60, swells to the radial outside Ra to press an inner circumferential surface of a pipe P in a radially outward direction Ra in order to plastically work a protrusion 9 in the neighborhood of an opening end part of the metallic pipe P, the protrusion 9 having a first gradient surface 9a and a second gradient surface 9b. The bulging apparatus further comprises: an annular first die member 61 having a first gradient forming surface 61e; an annular second die member 62 having a second gradient forming surface 62e; and a hook member 63 which is held by the second die member and has a latching protrusion 63d brought into an engaged state with the first die member by a small angle rotation around an axial center L of the first die member, the hook member is held by the second die member slightly moveably and slidably in a direction of drawing the first die member to the second die member in accordance with the actuation of the actuator.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a bulge processing apparatus.

  Conventionally, in order to connect metal pipes with a pipe joint, a hand tool for bulging (for example, refer to Patent Document 1) for plastically processing a protruding ridge that bulges radially outward, FIG. As shown, the bulge is provided with an elastic body 96 that is compressed in the axial direction E along with the operation of the hydraulic cylinder 90 and bulges radially outward Ra to press the inner peripheral surface of the pipe P radially outward Ra. Processing devices are known. In FIG. 20, the upper half portion from the axis L9 indicates a state where the machining preparation is completed, and the lower half portion from the axis L9 indicates a state during the plastic processing.

Japanese Patent No. 5953410

However, the hand tool for bulge processing described in Patent Document 1 has a problem that it takes a lot of labor and time for processing.
Further, the conventional bulge processing apparatus shown in FIG. 20 includes an annular first mold member 91 having a first gradient forming surface 91e for forming a first gradient surface 99a of the ridge 99, and a ridge 99. Since the annular second mold member 92 having the second gradient forming surface 92e for forming the second gradient surface 99b is machined in a threaded state, the hydraulic cylinder 90 is actuated after the ridge 99 is formed. Even if is released (released), the first inclined surface 99a of the ridge 99 is in strong pressure contact with the first inclined surface 91e of the first mold member 91, so the first mold member 91 is screwed out. Therefore, it is necessary to rotate using a clamping work tool such as a pipe wrench, which is troublesome.

  Therefore, the present invention allows the first mold member mounting / removal work to be performed easily and quickly with a small force (manual hand) without requiring a large force using a work tool. An object is to provide a simple bulge processing apparatus.

  In order to achieve the above-mentioned object, the bulge processing apparatus of the present invention provides an actuator for performing plastic working on a convex strip having a first slope surface and a second slope surface in the vicinity of an opening end of a metal pipe. The pipe is inserted in a bulge processing apparatus provided with an elastic body that is compressed in the axial direction along with the operation and bulges radially outward to press the inner peripheral surface of the pipe radially outward. And an annular first mold member having a first gradient forming surface for receiving the pressing force from the elastic body to form the first gradient surface, and the opening end portion being inserted and the second gradient surface. An annular second mold member having a second slope forming surface for forming the first mold, and the first mold by a small angle rotation around the axis of the first mold member held by the second mold member A hook member having a locking projection that is engaged with the member; Provided, the hook member is to be held by fine movement slidably said second die member in a direction to pull the first mold member to said second die member by the actuation of the actuator.

  In addition, in order to plastically process the convex strip portion having the first slope surface and the second slope surface in the vicinity of the opening end portion of the metal pipe, it is compressed in the axial direction along with the operation of the actuator, and is out of the radial direction. In the bulge processing apparatus provided with an elastic body that bulges outward and presses the inner peripheral surface of the pipe radially outward, the first pipe is inserted and receives the pressing force from the elastic body. An annular first mold member having a first gradient forming surface for forming a gradient surface and having a female screw portion, and a second gradient for forming the second gradient surface while the opening end portion is inserted thereinto An annular second mold member having a forming surface, and a hook member having a male screw part that is held by the second mold member and screwed with the female screw part of the first mold member, The hook member is moved along with the operation of the actuator. The first mold member is what is held by fine movement slidably said second die member in a direction to draw into the second mold member.

In addition, the first mold member is configured to have a pressing holding ring that is attached to the joint body in a pipe connection state and presses the first slope surface of the protruding portion.
The actuator is a gun type that is connected to a pump for supplying a working fluid via a long high-pressure hose and has a grip portion that an operator can hold with one hand.

  ADVANTAGE OF THE INVENTION According to this invention, the setup operation | work for performing a bulge process and the removal operation | work after completion | finish of a bulge process can be performed easily and rapidly. A work tool such as a pipe wrench capable of exerting a large torque is not required, and the operator can grip and rotate the first mold member directly after bulge processing (can be removed with a small torque). The work efficiency of the entire bulge processing can be improved.

FIG. 2 is a cross-sectional side view of the bulge processing setup state according to the embodiment of the present invention. It is a principal part cross-section side view of a processing preparation completion state. It is a principal part cross-sectional side view in the middle of a bulge process. It is a principal part cross-sectional side view of a bulge processing completion state. It is a figure which shows an example of a hook member, Comprising: (A) is a front view, (B) is a side view, (C) is a top view. It is a figure which shows an example of a 2nd metal mold | die member, Comprising: (A) is a front view, (B) is YOY sectional drawing of (A), (C) is the principal of (B). FIG. It is a figure which shows an example of a 1st metal mold | die member, Comprising: (A) is a front view, (B) is a rear view, (C) is XX sectional drawing of (B). It is a cross-sectional side view which shows other embodiment. The other example of a receptacle member is shown, (A) is a cross-sectional side view of an assembly state, (B) is a cross-sectional side view of an exploded state. It is a figure which shows the other example of a hook member, Comprising: (A) is a front view, (B) is a half-cut cross-sectional side view. It is a rear view which shows an example of the front end side half body of a 2nd metal mold | die member. It is a front view which shows an example of the base end side half body of a 2nd metal mold | die member. It is sectional drawing explaining the specific shape of a protruding item | line part, Comprising: (A) is a triangular mountain-shaped protruding item | line part with a pointed top part, (B) is a triangular mountain-shaped protruding item | line with a rounded top part. (C) is a round hill type convex part, and (D) is a Maruyama type convex part. It is a perspective view of the whole apparatus. FIG. It is a cross-sectional side view of the pipe connection state by a pipe joint. It is a figure which shows the principal part of a coupling main body, Comprising: (A) is a principal part perspective view, (B) is a front view, (C) is UOU sectional drawing of (B). It is a figure which shows an insertion member, Comprising: (A) is a rear view, (B) is a b arrow view of (A), (C) is a c arrow view of (A). It is a cross-sectional side view which shows another embodiment. It is a cross-sectional side view which shows the conventional bulge processing apparatus.

Hereinafter, the present invention will be described in detail based on the illustrated embodiment.
As shown in FIG. 3, the bulge processing apparatus according to the present invention has a ridge portion 9 having a first gradient surface 9 a and a second gradient surface 9 b in the longitudinal sectional view in the vicinity of the opening end portion of a metal pipe P. Is plastically processed to project radially outward Ra over the entire circumference of the pipe (360 degrees).

As shown in FIG. 1 to FIG. 4, an actuator 60 having a drive rod 60a that can be expanded and contracted in the axial direction E, and a stepped extension rod 65 that is coaxially attached to the drive rod 60a. An annular elastic body 66 that is externally fitted to the small diameter portion of the extension rod 65 and is adjacent to the rod step surface 65d, and an external fitting shape that is externally fitted to the small diameter portion of the extension rod 65 on the base end surface of the elastic body 66 And an annular annular metal pressing member (backup ring) 67.
In the axial center direction E, the barrel 60b side of the actuator 60 will be referred to as the proximal end side and the direction will be described.

  As shown in FIG. 3, the elastic body 66 is compressed in the axial direction E along with the shortening operation of the drive rod 60a and bulges outward in the radial direction Ra so that the inner peripheral surface of the pipe P is radially outwardly raised. It is comprised so that it may press.

  An annular first mold member 61 having a first gradient forming surface 61e for receiving the pressing force from the elastic body 66 and forming the first gradient surface 9a through the pipe P, and the pipe P An annular (tubular) second mold member 62 having a second gradient forming surface 62e for inserting the opening end portion and forming the second gradient surface 9b, and a longitudinal section held by the second mold member 62 An L-shaped hook member 63 and a cylindrical case-shaped holding member 64 for preventing the hook member 63 from being detached from the second mold member 62 are provided.

Here, the orientation of the configuration (shape) of the hook member 63 will be described with the orientation in which the hook member 63 is held by the second mold member 62 as the reference orientation of the hook member 63.
In FIG. 5, the hook member 63 projects from the first piece 63a along the axial direction E in a side view and from the base end side of the first piece 63a to the radially inward Rb side in a side view. And a second piece 63b.

  The first piece 63a of the hook member 63 has an arcuate outer surface 63c on the radial outer side Ra. Further, the first piece 63a is formed at the tip of the first piece 63a by the front-side arcuate locking groove 63e recessed from the arcuate outer surface 63c at the tip and the locking groove 63e. It has a locking projection 63d that is arc-shaped in front view. Moreover, it has a flat sliding contact surface 63f formed in a single letter shape in front view on the radial inner side Rb side.

  The second piece 63b of the hook member 63 has a pressure-receiving surface 63j that is orthogonal to the axial center and receives the operating force of the actuator 60 by contacting the base end surface of the pressing member 67.

In FIG. 6, the second mold member 62 has a cylindrical shape, and a second gradient forming surface 62e formed in a tapered inner peripheral surface shape whose diameter is enlarged (enlarged) toward the tip at the opening tip. A first hole portion 62f having a straight inner peripheral surface in contact with the inner end edge of the second gradient forming surface 62e and into which the pipe end portion is inserted, and an orthogonal axis that contacts the pipe end surface and regulates the pipe insertion amount A planar pipe contact portion 62h, a pressure receiving surface 62j that is orthogonal to the axial center and that contacts the pressing member 67 when the actuator 60 is actuated to prevent the pressing member 67 from moving toward the proximal end, and a first hole And a second hole 62g through which the extension rod 65 is inserted. The first hole portion (receiving portion) 62f is formed in a size that allows the pipe P, the extension rod 65, and the pressing member 67 to be inserted.
In addition, the 2nd metal mold | die member 62 shown in FIG. 1 has illustrated the YOY cross section of FIG. 6 (A).

Further, the second mold member 62 has a plurality of holding recesses 62a and holding holes 62b that are recessed in the radially inward direction Rb at equal intervals around the shaft center L, and the plurality of hook members 63 are arranged in the center. It is provided so as to be held at regular intervals around L.
The holding recess 62a has a rectangular shape in plan view, and has a flat bottom surface (sliding contact surface) on which the sliding contact surface 63f of the first piece 63a of the hook member 63 comes into sliding contact.
The holding hole 62b opens so that the second piece 63b of the hook member 63 can be inserted from the radial outer side Ra. In addition, a window portion 62c is provided in the hole deep portion of the holding hole portion 62b. The window 62c is opened in the axial direction E so as to communicate with the first hole 62f, and is provided so that the pressure receiving surface 63j of the hook member 63 is exposed in the first hole 62f.

The holding recess 62a and the holding hole 62b are provided so as to prevent the hook member 63 from being displaced around the axis L, and the hook member 63 can be finely slid in the axial direction E. Provided.
In the present invention, the term “finely slidable” means slidable with a slide stroke (movement amount) of 0.2 mm or more and 1 mm or less.

  As shown in FIGS. 1 to 4, the hook member 63 disposed in the holding recess 62a and the holding hole 62b is held on a part of the arcuate outer surface 63c (part excluding the locking projection 63d). The inner peripheral surface of the member 64 approaches or abuts from the radial outer side Ra and is prevented from being separated from the second mold member 62 to the radial outer side Ra by the holding member 64.

The holding member 64 is attached (fixed) to the second mold member 62, and the second mold member 62 is detachably attached (fixed) to a fixing portion (barrel portion 60b, casing portion, etc.) of the actuator 60. Has been.
Here, the assembly of the second mold member 62, the hook member 63, and the holding member 64 may be referred to as the receiving member 2.
Each axis L of the actuator 60 (drive rod 60a), the receiving member 2 and the first mold member 61 and the pipe axis Lp are coaxial (upper).

In FIG. 7, the first mold member 61 has a first gradient forming surface 61e having a taper (reverse taper) inner circumferential surface that expands (expands) from the distal end opening side to the proximal end side at the distal end inner circumferential portion. have. In addition, a plurality of inner protrusions 61d having a circular arc when viewed from the front are provided around the shaft center L at the base end side inner peripheral portion. Further, a slit 61a having a circular arc when viewed from the front is provided in the axial direction (axial direction) E between the adjacent inner protrusions 61d and 61d around the axial center L (in the circumferential direction).
In addition, the 1st metal mold | die member 61 of FIG. 1 has illustrated the XX cross section of FIG.7 (B).

The first mold member 61 and the receiving member 2 are provided with locking means for allowing the first mold member 61 and the receiving member 2 to be engaged and disengaged with each other.
As shown in FIG. 1, the locking means is configured such that the first mold member 61 and the receiving member 2 are fitted to each other when the first mold member 61 approaches in the axial direction (one axial direction indicated by an arrow N). And at a small angle around the axis L (rotation in the direction indicated by arrow M), the outer periphery of the distal end of the receiving member 2 and the inner periphery of the base end of the first mold member 61 are It is configured to be locked to each other and maintain the locked state without being separated (separated) in the axial direction E.

That is, the first mold member 61 is moved close to the receiving member 2 in one axial center direction N, and the inner protrusion 61d of the first mold member 61 is adjacent to the hook member adjacent to the axis L. It is arranged between 63 and 63 (the gap 25 for fitting), and the distal end outer peripheral portion of the receiving member 2 (second mold member 62) and the proximal end inner peripheral portion of the first mold member 61 are radial. Fit in the opposite direction (wrapped). That is, fitting is performed by approaching in the axial direction. Thereafter, by rotating the first mold member 61 in the direction of arrow M with a small angle around the axis L, the inner protrusion 61d is inserted into the locking groove 63e from the circumferential direction, and the inner protrusion 61d. Are arranged in a facing manner in the axial direction E on the locking projection 63d (correspondingly), and are configured to be in a locking state that prevents them from being separated from each other in the axial direction E.
Further, when rotated by a small angle, the contact portion provided on the inner peripheral portion of the tip of the first mold member 61 comes into contact with the stopper surface of the receiving member 2 (hook member 63 or second mold member 62), Rotation in the M direction beyond a small angle is prevented.
That is, the locking means includes a locking projection 63d, a locking groove 63e, a fitting gap 25, and an inner protrusion 61d. In the receiving member 2, the locking projections 63d and the fitting gaps 25 are alternately arranged in the circumferential direction.

The small angle is 15 degrees or more and 95 degrees or less, and more preferably 30 degrees or more and 90 degrees or less. If it is less than the lower limit value, it takes time for positioning when fitting by approaching in the axial direction, and if it exceeds the upper limit value, the amount of small angle rotation around the axis L becomes large and time consuming.
In other words, the inner protrusions 61d and the locking protrusions 63d (locking groove portions 63e) are set to have two or more and six or less at equal intervals around the axis L. For example, when it is two, it is about 90 degrees, when it is three, it is about 60 degrees, and when it is six, it is about 30 degrees. In the illustrated example, there are four and the small angle is about 45 degrees.

Next, the operation (usage method) of the bulge processing apparatus of the present invention will be described.
As shown in FIG. 1, the opening end of the pipe P is inserted from the tip opening of the first mold member 61. Thereafter, the opening end of the pipe P is inserted into the first hole 62f of the second mold member 62, and the pipe end surface is brought into contact with the pipe contact portion 62h. That is, the pipe P is inserted with a predetermined pipe insertion amount.

Then, the first mold member 61 and the receiving member 2 are brought into a locked (engaged) state by the locking means. That is, by fitting the receiving member 2 and the first mold member 61 by approaching in the axial direction and rotating the first mold member 61 in the direction of arrow M with a small angle around the axis L, FIG. As shown in FIG. 5, the inner protrusion 61d is disposed in the locking groove 63e, the inner protrusion 61d corresponds to the locking protrusion 63d in a face-to-face direction in the axial direction E, and the first mold member 61 and the receiving member 2 are prevented from being separated from each other in the axial direction E, and are ready for processing (the proximal end portion of the first mold member 61 is at the distal end portion of the receiving member 2). A state of being engaged in an outer fitting state).
In this processing preparation completion state, the hook member 63 can be finely slid in the axial direction E with respect to the second mold member 62, and the first mold member 61 can also be finely slid in the axial direction E.

  2, when the drive rod 60a is shortened (retracted) as shown in FIG. 3, from the rod step surface 65d of the extension rod 65 to the proximal end side through the elastic body 66. Acting force (toward the axial direction N) is transmitted to the pressing member 67, the proximal end surface of the pressing member 67 presses the pressure receiving surface 63j of the hook member 63, and the hook member 63 is moved to the proximal side (uniaxial direction). Slide finely to N).

The locking protrusion 63d (the base end side surface) of the hook member 63 is brought into contact with and locked with the inner protrusion 61d (the front end side surface) of the first mold member 61, and the first mold member is moved by the fine movement slide. 61 is pulled toward the second mold member 62 along the axial direction E.
Further, when the drive rod 60a is shortened, the pressing member 67 is prevented from moving toward the base end side (one axial direction N) by the contact of the second mold member 62 with the pressure receiving surface 62j. Then, the elastic body 66 is sandwiched between the distal end surface of the pressing member 67 and the (rod) step surface 65d of the extension rod 65 and bulges outward in the radial direction Ra, thereby pressing the inner peripheral surface of the pipe in the radial outward direction Ra. Upon receiving the pressing force of the elastic body 66, the outer peripheral surface of the pipe is pressed against the first gradient forming surface 61e and is plastically deformed by being pressed against the second gradient forming surface 62e, whereby the ridge 9 is formed.

  When this ridge 9 is formed (plastically processed), the first mold member 61 is pressed from the pipe P in the radial outward direction Ra and in the other direction of the axis (opposite direction of the arrow N), and the hook member 63 is prevented from moving in the other direction of the shaft center by the pressing force from the pressing member 67, the hook member 63 and the first mold member 61 are pulled in a direction away from each other in the shaft center direction E. Thus, the locking projection 63d and the inner protrusion 61d are strongly pressed against each other.

  When the drive rod 60a is extended (actuation pressure is released) after plastic working of the ridge 9, the hook member 63 is pressed by the pressing member 67 (the operating force of the actuator 60) as shown in FIG. Is released, and it becomes a finely slidable state in the axial direction E. Since the hook member 63 can be finely slid, the first mold member 61 can be finely slid in the axial direction E with respect to the hook member 63, and the locking protrusion 63 d of the hook member 63 and the first The pressure contact state between the inner protrusion 61d of the first mold member 61 is released, and the pressure contact between the first gradient surface 9a and the first gradient forming surface 61e is released, so that the first mold member 61 is It becomes possible to rotate in the unlocking direction (the direction opposite to the arrow M) with a small force (torque).

When the actuator 60 is shortened, the fine movement slide toward the base end side of the hook member 63 stops, so that the hook member 63 and the first mold member 61 are positioned at a predetermined processing start position ( Fixed).
Positioning of the processing start positions of the hook member 63 and the first mold member 61 is such that the base end surface of the first mold member 61 abuts on the distal end surface of the holding member 64 so that the fine movement slide of the hook member 63 is stopped. Or the base end surface of the hook member 63 comes into contact with the inner surface of the second mold member 62 on the base end side of the holding concave portion 62a or the holding hole 62b. The base end surface of the pressing member 67 may be in contact with the pressure receiving surface 62j of the second mold member 62 so that the fine movement slide of the hook member 63 is stopped.

Next, another embodiment will be described.
As shown in FIGS. 8 and 9, the other embodiment is different in the receiving member 2, and other configurations and operational effects are the same as those of the embodiment of FIGS. 1 to 7.
In another embodiment, the receiving member 2 is formed by dividing the second mold member 62 in the axial direction E, and further forming the hook member 63 in an annular shape. Further, the holding member 64 is omitted. In FIG. 8, the upper half part from the axis L indicates a state where machining preparation is completed, and the lower half part from the axis L indicates a state during plastic processing.

As shown in FIGS. 9 and 10, the hook member 63 includes a plurality of L-shaped hook portions (locking portions) 51 arranged at equal intervals around the axis L, and around the axis L. Arc-shaped connecting portions 52, 52 that are arranged between adjacent hook portions 51, 51 and connect adjacent hook portions 51, 51 around the axis L in the circumferential direction, and are generally annular (Ring shape).
Note that the hook member 63 shown in FIG. 9 shows a Z-O-Z cross section of FIG.

The hook portion 51 has a first piece portion 63a, a second piece portion 63b, a locking convex portion 63d, a locking concave groove portion 63e, and a pressure receiving surface 63j that have the same action as the hook member 63 of FIG. . The first piece 63a has an arcuate sliding contact surface 63f on the radial inner side Rb.
In addition, a fitting gap 25 is formed between the tip of the first piece 63a adjacent in the circumferential direction and the tip of the first piece 63a.

  As shown in FIG. 9, the second mold member 62 includes an annular front end half 71 and an annular proximal end half 72, and approaches and separates from each other in the axial direction E. And can be divided and merged. The distal half 51 and the proximal half 72 are joined (fixed) by a screw member 79 inserted in the axial direction E.

The second mold member 62 is in the combined state (assembled state), and has the same function as the second mold member 62 of FIG. A first hole 62f, a second hole 62g, a pipe contact part 62h, and a pressure receiving surface 62j are formed.
The tip-side half 71 has a second gradient forming surface 62e, a first hole 62f, a pipe contact portion 62h, a window portion 62c, and a pressure receiving surface 62j. Further, the circular outer peripheral surface of the front end side half 71 is used as a slidable contact surface with which the slidable contact surface 63f of the hook portion 51 is slidably contacted.

The second mold member 62 is divided into a distal half 51 and a proximal half 72 so that the proximal end of the holding hole 62b opens (opens) in the axial direction E. ing.
That is, as shown in FIG. 11, the distal end side half 71 has a recess 71b for forming the holding hole 62b in the back surface 71d, and in the combined state, the proximal end side corresponding to the recess 71b. The front surface 72a (see FIG. 12) of the half body 72 covers the recess 71b from the base end side to form a holding hole 62b (with the recess 71b and the front surface 72a).

Therefore, as shown in FIG. 9B, the distal end side half 71, the hook member 63, and the proximal end side half 72 are sequentially arranged in the axial direction E (toward one axial direction N). When the distal end side half 71 and the proximal end side half 72 are fixed by the screw member 79, the annular hook member 63 is axially moved between the distal end side half 71 and the proximal end half 72. E can be held from both sides of E.
Assembling of the receiving member 2 is facilitated and the production efficiency can be improved, and a plurality of hook portions 51 (the locking convex portion 63d and the locking concave groove portion 63e) are integrated so that the fine movement slide is interlocked (synchronized), and the bulge Processing accuracy and quality can be improved.
9 shows the VOV cross section of FIG. 11. The proximal half body 72 of FIG. 9 illustrates the W-O-W cross section of FIG.

In the present invention, the ridge 9 of the pipe P has a triangular mountain shape with a sharp top as shown in FIG. 13 (A), and the top has a roundness as shown in FIG. 13 (B). ) Triangular mountain type, or a round hill type (lower Maruyama type) with a large top as shown in FIG. 13 (C), or a semicircular shape as shown in FIG. 13 (D). In some cases, such as the Maruyama type.
In the ridge 9, the gradient surface formed near the pipe opening end in the longitudinal sectional view is called the second gradient surface 9b, and the opposite gradient surface is called the first gradient surface 9a.

Furthermore, as shown in FIGS. 14 and 15, the bulge processing apparatus of the present invention is connected to an electric pump 6 capable of supplying (feeding) working fluid such as hydraulic oil and compressed air, and is detachably connected to the pump 6. A possible long (1 meter or more) flexible high-pressure hose H and an actuator 60 detachably connected to the pump 6 via the high-pressure hose H are provided.
The actuator 60 is a gun type having a grip portion 60d that can be gripped by an operator with one hand.
With this configuration, bulge processing can be easily performed on piping work at high places and existing piping.

In addition to the gun-type actuator 60 (60A), a stationary actuator 60 (60B) connected to the pump 6 via a short (less than 50 cm) piping member is provided.
Further, the extension rod 65 to which the elastic body 66 and the pressing member 67 are attached in an outer fitting manner and the receiving member 2 are shared by the gun type actuator 60A and the stationary type actuator 60B (selective replacement is possible). ).
With this configuration, it is possible to easily perform bulging according to the size and length of the pipe P, the construction location, etc., and to reduce the number of parts (such as the extension rod 65 and the receiving member 2). One set).

And as shown in FIG. 16, although the pipe P by which the protruding item | line part 9 was plastically processed is connected using the pipe joint 5, the 1st metal mold | die member 61 is connected to the pipe joint 5 (pipe joint structure). As one part.
That is, the first mold member 61 is attached to the joint body 10 into which the pipe P is inserted in a pipe connection state by the pipe joint 5 and directly presses the first slope surface 9a of the ridge 9. The holding ring 3 is used.
Further, the pipe joint 5 (pipe joint structure) includes a joint locking means for allowing the first mold member 61 (pressing holding ring 3) and the joint main body 10 to be detachable from each other.

As shown in FIG. 16, the joint body 10 of the pipe joint 5 is provided with a seal groove 11 in the inner peripheral tip region (inner peripheral tip), and the seal groove 11 has a sealing material 12 such as an O-ring. In addition, a flat washer-shaped sealing material protection ring 14 is provided.
As shown in FIG. 17, the joint body 10 includes a plurality of arc-shaped outer protrusions 19 disposed at equal intervals around the shaft center L on the outer periphery of the tip, and outer protrusions adjacent in the circumferential direction. And a smooth arc-shaped outer surface portion (fitting space portion) 20 provided between the strip portion 19 and the outer protrusion strip portion 19. The outer ridge portion 19 is composed of a pair of outer ridge single members 21 and 22 arranged at a predetermined interval in the axial direction E, and between the pair of outer ridge single members 21 and 22, A stop groove portion 23 is formed.

  In other words, the joint locking means is used for mutual fitting by the approach in the axial direction of the first mold member 61 and rotation at a small angle around the axis L (similar to the locking means with the receiving member 2). Thus, the outer peripheral portion (receiving port portion) of the joint body 10 and the inner peripheral portion of the base end of the first mold member 61 are engaged with each other without being separated in the axial direction E (mutually). It is configured to keep the stopped state.

Moreover, the pipe joint 5 is provided with the insertion member 8 for maintaining the joint locking state.
As shown in FIG. 18, the insertion member 8 includes a C-shaped basic ring portion 80 and a plurality of projecting pieces 81 and 82 protruding from the basic ring portion 80 in the axial direction E.
The projecting pieces 81 and 82 and the basic ring portion 80 are integrally formed of synthetic resin, and the two projecting pieces 81 and 81 provided at positions opposite to each other by 180 ° have a simple arcuate cross section, and are C-shaped. The projecting piece 82 provided at a position 180 ° opposite to the notch 87 of the basic ring part 80 is divided into three parts, and consists of a central piece and left and right side pieces. A small locking claw portion 88 is provided at the tip of the side piece so as to protrude in the circumferential direction.

Here, when the first mold member 61 is rotated by a small angle to be in the joint locking state, as shown in FIG. 16, the slit portion 61a and the smooth arc-shaped outer surface portion (fitting space portion) 20 are arranged in the circumferential direction. Opposing as the same position, arc-shaped slits (gap) are formed penetrating in the axial direction. The projecting pieces 81 and 82 are inserted along the axial direction E into the penetrating arc-shaped slit (gap).
The insertion member 8 is inserted into the first mold member 61 from the axial direction, so that the locking claw portion 88 is a small concave recess 21d, 21d (see FIG. 17 ( A), the first mold member 61 is prevented from rotating in the reverse direction of the small angle rotation (arrow M), and is prevented from loosening.
The small angle described in the description of the joint locking means is the same as the small angle described in the description of the locking means with the receiving member 2. Further, in the axial direction E, the insertion restricting surface 13 side of the joint body 10 with which the opening end surface of the pipe P abuts is called a proximal end side.

FIG. 19 shows another embodiment.
As shown in FIG. 19, the first mold member 61 (pressing holding ring 3) is provided with a female screw part 61 k at the base end part, and a male screw part 63 k is provided at the tip part of the hook member 63. The member 61 and the receiving member 2 are attached (connected) by screwing.
Other configurations and operations of the first mold member 61 are the same as those in the above-described embodiment.
Other configurations and operations of the receiving member 2 (second mold member 62 and hook member 63) are the same as those in the embodiment described with reference to FIGS.
The configurations and operations of the actuator 60, the extension rod 65, the elastic body 66, the pressing member 67, and the like are the same as in the above-described embodiment.
Although not shown, the joint body 10 to which the first mold member 61 is attached is provided with a joint male thread portion that is screwed with the female thread portion 61k of the first mold member 61.
In FIG. 19, the upper half portion from the axis L indicates a state where machining preparation is completed, and the lower half portion from the axis L indicates a state during plastic processing.

  The present invention can be modified in design, and the actuator 60 may be a stationary type connected to a manual pump. The actuator 60 is preferably a hydraulic cylinder, but may be an electric linear reciprocating actuator or an air cylinder. The material of the elastic body 66 may be rubber or resin that can be elastically deformed, for example, urethane rubber.

The pipe P is made of a thin metal pipe, for example, a stainless steel pipe defined in JIS G3448, and is mainly used for piping such as water supply / hot water supply or drainage.
Regarding the relationship between the outer diameter of the pipe P and the wall thickness, the pipe P is preferably set to have an outer diameter of 10 mm to 65 mm and a wall thickness of 1.0 mm to 1.6 mm.

  As described above, the bulge processing apparatus according to the present invention is an actuator for plastic working the protruding strip portion 9 having the first inclined surface 9a and the second inclined surface 9b in the vicinity of the opening end portion of the metal pipe P. In a bulge processing apparatus provided with an elastic body 66 that is compressed in the axial direction E with the operation of 60 and bulges radially outward Ra to press the inner peripheral surface of the pipe P radially outward Ra. The annular first mold member 61 having a first gradient forming surface 61e through which the pipe P is inserted and receiving the pressing force from the elastic body 66 to form the first gradient surface 9a, and An annular second mold member 62 having an opening end portion inserted therein and a second gradient forming surface 62e for forming the second gradient surface 9b, and the first mold held by the second mold member 62 are provided. The mold member 61 is engaged with the first mold member 61 by a small angle rotation around the axis L of the mold member 61. A hook member 63 having a locking projection 63d to be in a state, and the hook member 63 pulls the first mold member 61 toward the second mold member 62 in accordance with the operation of the actuator 60. Since it is held by the second mold member 62 so as to be slidable finely, set-up work for performing bulge processing (attachment of the first mold member 61 and the receiving member 2) and after completion of the bulge processing Can be easily and quickly performed (removal of the first mold member 61). There is no need for a work tool such as a pipe wrench that can exert a large torque, and after bulge processing, the operator can directly grip and rotate the first mold member 61 by hand (can be removed with a small torque). . Moreover, the attaching / detaching operation can be performed only by rotating the first mold member 61 by a small angle. The work efficiency of the entire bulge processing can be improved.

  Further, in order to plastically process the ridge 9 having the first gradient surface 9a and the second gradient surface 9b in the vicinity of the opening end portion of the metal pipe P, in the axial direction E along with the operation of the actuator 60, In a bulge processing apparatus provided with an elastic body 66 that is compressed and bulges radially outward Ra to press the inner peripheral surface of the pipe P radially outward Ra, the pipe P is inserted and the elasticity An annular first mold member 61 having a first gradient forming surface 61e for receiving the pressing force from the body 66 to form the first gradient surface 9a and having an internal thread portion 61k, and the opening end portion An annular second mold member 62 that is inserted and has a second gradient forming surface 62e for forming the second gradient surface 9b, and is held by the second mold member 62, and the first mold member 61 A hook member 63 having a male screw portion 63k screwed with the female screw portion 61k; The hook member 63 is held by the second mold member 62 so as to be finely slidable in a direction of pulling the first mold member 61 toward the second mold member 62 in accordance with the operation of the actuator 60. Therefore, it is easy to perform setup work for bulging (attachment of the first mold member 61 and the receiving member 2) and removal work after the bulge processing (removal of the first mold member 61). And can be done quickly. There is no need for a work tool such as a pipe wrench that can exert a large torque, and after bulge processing, the operator can directly grip and rotate the first mold member 61 by hand (can be removed with a small torque). . Moreover, the first mold member 61 can be attached to the hook member 63 with a strong force (screwing force). The work efficiency of the entire bulge processing can be improved.

  In addition, the first mold member 61 is configured with the pressure holding ring 3 that is attached to the joint body 10 in a pipe connection state and presses the first slope surface 9a of the protruding portion 9. Gradient surface 9a and first gradient forming surface 61e can be in close contact with each other (the accuracy of metal touch is good), and even when a strong pipe pulling force acts between pipe joint 5 and pipe P, sufficient pipe pull-out preventing force is exhibited. it can. It is possible to plastically process the ridge 9 that is optimal for the pipe joint structure.

  The actuator 60 is connected to the pump 6 for supplying the working fluid via a long high-pressure hose H, and is a gun type having a grip portion 60d that can be gripped by an operator with one hand. Bulging can be performed easily and quickly on a certain pipe P, an existing pipe P, or a fixed pipe P.

Reference Signs List 3 Press retaining ring 6 Pump 9 Projection strip 9a First slope surface 9b Second slope surface
10 Fitting body
60 Actuator
60d grip
61 First mold member
61e First slope forming surface
61k female thread
62 Second mold member
62e Second slope forming surface
63 Hook member
63d Locking projection
63k Male thread
66 Elastic body
E Shaft direction H High pressure hose L Shaft center P Pipe Ra Radial outward

Claims (4)

Actuation of the actuator (60) in order to plastically process the ridge (9) having the first inclined surface (9a) and the second inclined surface (9b) in the vicinity of the opening end of the metal pipe (P). And an elastic body (66) that is compressed in the axial direction (E) and bulges radially outward (Ra) and presses the inner peripheral surface of the pipe (P) radially outward (Ra). In the bulge processing equipment
An annular first having a first gradient forming surface (61e) for inserting the pipe (P) and receiving the pressing force from the elastic body (66) to form the first gradient surface (9a). A mold member (61), and an annular second mold member (62) having a second gradient forming surface (62e) for inserting the opening end portion and forming the second gradient surface (9b) The second mold member (62) is held in engagement with the first mold member (61) by a small angle rotation around the axis (L) of the first mold member (61). A hook member (63) having a stop projection (63d),
The hook member (63) is slidable in the direction of pulling the first mold member (61) toward the second mold member (62) in accordance with the operation of the actuator (60). A bulge processing device characterized by being held by a member (62). Actuation of the actuator (60) in order to plastically process the ridge (9) having the first inclined surface (9a) and the second inclined surface (9b) in the vicinity of the opening end of the metal pipe (P). And an elastic body (66) that is compressed in the axial direction (E) and bulges radially outward (Ra) and presses the inner peripheral surface of the pipe (P) radially outward (Ra). In the bulge processing equipment
The pipe (P) is inserted and has a first gradient forming surface (61e) for receiving the pressing force from the elastic body (66) to form the first gradient surface (9a), and a female screw portion An annular first mold member (61) having (61k) and an annular first surface (62e) for inserting the opening end portion and forming the second gradient surface (9b). A second mold member (62) and a male screw part (63k) held by the second mold member (62) and screwed into the female screw part (61k) of the first mold member (61) A hook member (63) having,
The hook member (63) is slidable in the direction of pulling the first mold member (61) toward the second mold member (62) in accordance with the operation of the actuator (60). A bulge processing device characterized by being held by a member (62).   The first mold member (61) has a pressing holding ring (3) that is attached to the joint body (10) in a pipe connection state and presses the first inclined surface (9a) of the ridge (9). The bulge processing apparatus according to claim 1 or 2, wherein the apparatus is configured.   The actuator (60) is connected to a pump (6) for supplying a working fluid via a long high-pressure hose (H), and has a grip portion (60d) that can be gripped by an operator with one hand. The bulge processing device according to claim 1, 2 or 3 which is a mold.

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