JP3198308B2 - Slotted Elbow Groove Processing Machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates, on the groove machine of the grooved elbow.

[0002]

2. Description of the Related Art As a pipe joint which is known as a conventional pipe joint and replaces a threaded joint and a flange joint, as shown in FIG.
An annular groove 52 is formed on the outer periphery of the connection end of the two iron pipes 50, 51, and an annular packing 53 is interposed between the butted end faces of the two pipes at the construction site, or as shown in FIG. As shown in FIGS. 9 and 10, the housing 55 is divided into two parts by radially enclosing the outer periphery of the region on the tip side of the annular groove 52 of 50, 51 with one cylindrical packing 54.
A, 55B is a fastening member 56 composed of bolts and nuts.
There is a tendency that a groove joint having a structure in which the joints are integrally connected is frequently used. According to the groove joint, the joint can be connected or detached without rotating the pipe unlike the threaded joint, so that the workability of attaching and detaching the joint is good. In addition, when repairing or replacing a pipe, a predetermined pipe can be removed while the pipe remains as it is, and a new pipe can be piped to the removed portion, so that pipe workability is good. In addition, there is an advantage that the troublesome thread cutting work performed at the piping site is not required. Furthermore, the flange joint requires the flange to be connected to the pipe in advance by welding or the like, so it is not suitable for piping work in which the length of the pipe must be determined according to the situation at the site. On the other hand, according to the groove joint, an annular groove 52 is formed on the outer periphery of the connection end of the pipes 50 and 51 cut to a predetermined length at the piping site.
Can be formed, so that there is an advantage that piping can be performed correspondingly regardless of the situation at the site.

[0003] Thus, compared to conventional threaded joints, flanged joints and the like, the workability of attaching and detaching and piping work is improved,
In addition, the annular groove 52 for forming the groove joint in which the workable range of the pipe is expanded is formed by a pipe groove processing machine described in Japanese Utility Model Publication No. 2-42337. on the other hand,
When branch pipes are to be branched from the main pipe, an iron elbow in which a circumferential annular groove is formed in advance on one axial end side is prepared, and an iron elbow opposite to the annular groove of the iron elbow is prepared. It is necessary to join the end face to the main pipe by welding, and to perform branch pipe branch piping by a groove joint using a circumferential annular groove and an annular groove formed on the outer periphery of the connection end of the branch pipe. . However, there is no elbow that can do this. Further, the above-mentioned pipe groove processing machine has a disadvantage that the pipe on which the annular groove 52 can be formed is limited to a straight pipe as shown in FIGS. In other words, even if the rolling roller is brought into contact with the elbow externally fitted on the mold roll and the elbow is simultaneously rotated together with the mold roll and the rolling roller, the elbow may have a small curvature on the curved side. Not only the inner surface but also the inner surface on the side of the large curvature curve interferes with the outer periphery of the leading end of the mold roll, so that the elbow cannot be rotated. Therefore, since it is impossible to form a circumferential annular groove in an iron elbow, such a grooved elbow cannot be produced.

[0004]

The problem to be solved is that when branch pipes are branched from the main pipe, an iron elbow in which a circumferential annular groove is formed in advance is prepared. The other end face of the annular groove is joined to the main pipe by welding, and the branch pipe is joined by a groove joint using a circumferential annular groove and an annular groove formed on the outer periphery of the connection end of the branch pipe. even if desire to perform branch pipe, in that no devices that make the grooved elbow where Ru can be satisfied this need.

[0005]

Means for Solving the Problems The inventions of claims 1 to 3 are:
A processing machine that can make grooved elbows that meet the above demands
Then, it was configured as follows.

According to a first aspect of the present invention, an annular groove is formed on the outer periphery.
Type roll is attached to the rotating spindle so that it can rotate simultaneously.
Roller having an annular projection that can be fitted into the annular groove of the mold roll.
The pressure roll has an axis parallel to the rotating main shaft and has a movable blower.
With the movable block in front of it.
The roller is moved forward and backward with respect to the rotating spindle, and
The annular protrusion is inserted into and retracted from the annular groove of the mold roll.
In a groove processing machine provided with a reciprocating movement mechanism,
-The tip of the tip of the annular groove is closer to the tip than near the tip.
It is characterized in that it is formed in a tapered shape that decreases in diameter toward the tip.
It is a sign.

According to a second aspect of the present invention, a mold roll having an annular groove formed on the outer periphery is attached to a rotating main shaft so as to be rotatable at the same time, and an annular protrusion is formed which can be fitted into the annular groove of the mold roll. A rolling roller is pivotally supported by a movable block having an axis parallel to the rotating main shaft, and the movable block is moved forward and backward with respect to the rotating main shaft to form an annular ring of the rolling roller. In a grooving machine provided with an advance / retreat moving mechanism for inserting and retracting a protrusion into and out of an annular groove of the mold roll , a tip end of the mold roll closer to the tip end than the annular groove has a tip end near the tip end. together when it is formed in a tapered to reduced diameter toward
A plurality of supports which are relatively fitted to the rolling roll and rolled.
A roll is pivotally supported on the movable block, and these supporting rolls are supported.
Regulates the axial and radial swing of the compacting roll
It is characterized by having been constituted so that .

According to a third aspect of the present invention, a mold roll having an annular groove formed on the outer periphery is attached to a rotating main shaft so as to be rotatable at the same time, and an annular protrusion is formed which can be fitted into the annular groove of the mold roll. A rolling roller is pivotally supported by a movable block having an axis parallel to the rotating main shaft, and the movable block is moved forward and backward with respect to the rotating main shaft to form an annular ring of the rolling roller. In a grooving machine provided with an advance / retreat moving mechanism for inserting and retracting a protrusion into and out of an annular groove of the mold roll , a tip end of the mold roll closer to the tip end than the annular groove has a tip end near the tip end. subjected is formed in tapered to reduced in diameter, and the type b
-Surround the outer periphery of the rear end of the
Wear plate to contact is characterized in that you have been placed.

[0009]

According to the first aspect of the present invention , an elbow is provided on the mold roll.
The end on the side of the annular groove is externally fitted, and movable by the reciprocating mechanism
When the block is moved in the direction of the rotating spindle, the rolling roll
Of the elbow on the outer periphery of the annular groove forming side end.
Touch In this state, rotate the rotating spindle and move
The movable block is gradually moved in the direction of the rotating spindle by the moving mechanism.
When it is moved, the rolling roller and elbow start to rotate at the same time.
You. In other words, move the tip of the mold roll from near the tip to the tip.
It is formed in a tapered shape that reduces the diameter
Not only the inner surface of the large curvature side, but also the inner surface of the small curvature side
The elbow is also used without interfering with the outer periphery of the tip of the mold roll.
Can be rotated. In this way, the movable block
While gradually moving in the direction of the rotating spindle,
By rotating the elbow at the same time, the rolling roll
The end of the annular groove forming side of the elbow is
The annular groove can be formed by fitting into the annular groove.

According to the second aspect of the present invention, when the end of the annular groove forming side of the elbow is externally fitted to the mold roll, and the movable block is moved in the direction of the rotating main shaft by the advance / retreat moving mechanism, the rolling roller is provided. The annular protrusion of the elbow contacts the outer periphery of the annular groove forming side end of the elbow. In this state, when the rotating main shaft is rotated and the movable block is gradually moved in the direction of the rotating main shaft by the advance / retreat moving mechanism, the rolling roller and the elbow start to rotate simultaneously. That is, since the leading end of the mold roll is formed in a tapered shape whose diameter is reduced from the vicinity of the leading end to the leading end, not only the inner surface of the elbow on the curved side with a large curvature but also the inner surface on the curved side with a small curvature is formed. The elbow can be rotated without interfering with the outer periphery of the tip of the screw. In this way, the rolling roller and the elbow are simultaneously rotated while the movable block is gradually moved in the direction of the rotating main shaft, so that the annular projection of the rolling roller forms the annular groove forming side of the elbow. The end can be fitted into the annular groove of the mold roll to form an annular groove. Also, a plurality of support rolls pivotally supported by the movable block.
To control the axial and radial swing of the rolling roll.
Control of the mold roll during the formation of the annular groove of the elbow
The axial direction of the annular groove on the outer circumference and the annular projection on the outer circumference of the rolling roller
And the relative displacement in the radial direction can be suppressed,
The annular groove on the outer periphery of the mold roll and the annular projection on the outer periphery of the rolling roller
And securely support the elbow without swinging
be able to. Therefore, the end of the elbow on the annular groove forming side
An appropriate annular groove can be formed .

According to the third aspect of the present invention, when the end of the annular groove forming side of the elbow is externally fitted to the mold roll and the movable block is moved in the direction of the rotating main shaft by the advance / retreat moving mechanism, the rolling roller is provided. The annular protrusion of the elbow contacts the outer periphery of the annular groove forming side end of the elbow. In this state, when the rotating main shaft is rotated and the movable block is gradually moved in the direction of the rotating main shaft by the advance / retreat moving mechanism, the rolling roller and the elbow start to rotate simultaneously. That is, since the leading end of the mold roll is formed in a tapered shape whose diameter is reduced from the vicinity of the leading end to the leading end, not only the inner surface of the elbow on the curved side with a large curvature but also the inner surface on the curved side with a small curvature is formed. The elbow can be rotated without interfering with the outer periphery of the tip of the screw. In this way, the rolling roller and the elbow are simultaneously rotated while the movable block is gradually moved in the direction of the rotating main shaft, so that the annular projection of the rolling roller forms the annular groove forming side of the elbow. The end can be fitted into the annular groove of the mold roll to form an annular groove. Also, there is a contact roll surrounding the outer periphery of the rear end of the mold roll.
With the elbow grooved end face abutting against the plate,
The elbow can be rotated, so
Regardless of the rotation, the rotor rotates in a state where the core does not run out. did
Therefore, form an appropriate annular groove at the end of the elbow on the side where the annular groove is formed.
Can be achieved.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view showing a part of a groove processing machine for a grooved elbow, FIG. 2 is a front view, and FIG. 3 is a plan view. In these figures, a vertical front panel 1 has an upper part 1A.
A rectangular opening 1B having a width dimension indicated by W and a height dimension indicated by H is formed at the center of the region except for the horizontal base by a highly rigid mounting structure such as welding or screw fastening. The slab 2 is erected at the front end.
On the front surface of the upper part 1A of the vertical front plate 1, an advance / retreat moving mechanism 3 composed of, for example, a hydraulic cylinder is attached with a vertical axis.
The high-pressure oil is supplied from the well-known hydraulic oil supply system 6A of the hydraulic circuit 6 to the reciprocating and moving mechanism 3 by the forward switching operation of the hydraulic circuit 6, the piston rod (not shown) is lowered, and the switching valve 5 is operated in the reverse direction by the operating handle 4. By the switching operation, the high-pressure oil is recirculated through the hydraulic oil recirculation system 6B of the hydraulic circuit 6, and the spring force of the tension springs 7, 8 is transmitted to the piston rod through a path described later, and the piston rod is raised and returned. Works as follows. The rectangular opening 1B
The first movable block 9 and the second movable block 10 are vertically vertically separated and fitted to each other. That is, the first movable block 9 and the second movable block 10 include:
Vertical guide grooves 9A, 9 at both ends in the width direction, respectively.
A, 10A, and 10A are formed.
A, 9A, 10A, and 10A are fitted with the peripheral portion of the rectangular opening 1B of the vertical front plate 1 so as to slide.

The lower first movable block 9 has a rolling roller
A roller 11 is rotatably supported via a horizontal shaft 12, and an annular projection 11A is formed on the outer periphery of the rolling roller 11. The upper second movable block 10 includes:
The two support rolls 13, 14 have horizontal axes 15, 16
The lower end of the piston rod (not shown) is connected to the upper end thereof.
These support rolls 13 and 14 have circumferential annular grooves 1.
3A and 14A are formed, and these annular grooves 13A and 1A are formed.
4A, the annular protrusion 11A of the rolling roller 11 is fitted, and the outer circumference of the supporting rolls 13, 14 is brought into contact with the outer circumference of the rolling roller 11, so that the supporting rolls 13, 14 are brought into contact with each other. 14 regulates the axial and radial swings of the rolling roller 11. First movable block 9 and second movable block 1
0 is always urged upward by the tension springs 7 and 8. That is, the upper end of the tension spring 7 connected to the first movable block 9 via the pin 17 is connected to the second movable block 10 via the pin 18 and is connected to the second movable block 10 via the pin 18. The upper end of the tension spring 8 is connected to an upper portion 1A of the vertical front plate 1 via a pin 19. Therefore, when high-pressure oil is supplied to the forward / backward moving mechanism 3 by the forward switching operation of the switching valve 5 by the operating handle 4, the piston rod, the first movable block 9 and the first movable block 9 resist the spring force of the tension springs 7, 8. Second movable block 1
When the high-pressure oil is recirculated from the reciprocating mechanism 3 by the switching operation of the switching valve 5 by the operation handle 4 in the reverse direction, the first springs 7 and 8 apply the first spring force.
The movable block 9 and the second movable block 10 are raised and returned, whereby the piston rod is raised and returned.

The main shaft 20 in the horizontal direction is rotatably supported by a bearing member 21 mounted on the upper surface of the base plate 2, and is driven to rotate by a driving device 22. A mold roll 23 is simultaneously and removably attached to the tip of the rotary spindle 20 by a key connection or a spline connection (not shown). A chamfer 23A having a small inclination angle is provided, and is formed into a tapered shape whose diameter decreases from near the front end to the front end, and a circumferential annular groove 23B is formed on the rear side of the chamfer 23A. Also, a high rigidity and wide area vertical contact plate 24 surrounds the outer periphery of the rear end of the mold roll 23, and the base plate 2 and its lower frame are formed by an attachment structure such as welding or screw fastening. -(Not shown).

Next, the operation of the above configuration will be described. . By the reverse switching operation of the switching valve 5 by the operation handle 4, the high-pressure oil of the advance / retreat moving mechanism 3 is returned, and the piston rod, the first movable block 9 and the second movable block 10 are caused by the spring force of the tension springs 7 and 8. At the start position. . As shown in FIG. 4, an annular groove forming side end portion 25A of an iron elbow 25 made of a pipe material such as weldable iron is formed into a mold roll 23.
And the end face thereof is brought into contact with the front surface of the vertical abutment plate 24. That is, the neck portion 25A at one axial end of the necked elbow 25 is externally fitted to the mold roll 23, and the neck portion 25A
Is brought into contact with the front surface of the vertical contact plate 24. . By the switching operation of the switching valve 5 in the forward direction by the operating handle 4, high-pressure oil is supplied to the advance / retreat moving mechanism 3, and the piston rod, the first movable block 9 and the second movable block 9 are opposed to the spring forces of the tension springs 7, 8. Lower the movable block 10,
As shown in FIG.
1A is brought into contact with the outer periphery of the annular groove forming end 25A of the elbow 25. In this state, the driving spindle 22 is driven by the driving device 22.
Is rotated, and the movable blocks 9 and 10 are gradually moved in the direction of the rotating main shaft 20 by the advance / retreat moving mechanism 3,
The rolling roller 11 and the elbow 25 start rotating at the same time. At the tip of the mold roll 23 on the tip side from the annular groove 23B , the chamfer 23A is formed in a tapered shape whose diameter is reduced from near the tip to the tip. The inner surface of the small curvature curved side R2 does not interfere with the outer periphery of the leading end of the mold roll 23.
Therefore, rotation of the elbow 25 is allowed. . As described above, the first movable block 9 and the second movable block 1
By rotating the rolling roller 11 and the elbow 25 at the same time while gradually moving 0 in the direction of the rotating spindle 20,
As shown in FIG. 6, a part of the annular groove forming side end portion 25A of the elbow 25 is fitted into the annular groove 23B of the mold roll 23 by the annular protrusion 11A of the rolling roller 11, and here. An annular groove 25B can be formed. . After the piston rod, the first movable block 9 and the second movable block 10 are raised to the start position by the same operation as described above, the elbow 25 having the annular groove 25B is removed from the mold roll 23. Prepare for the next processing.

As shown in FIG. 8, the iron elbow 25 shown in FIG. 7 having the annular groove 25B machined has the opposite end face of the annular groove 25B joined to the main pipe 26 by welding. The housing 29A, 29B, which is divided into two parts in the radial direction, is formed by surrounding the outer periphery of the region on the distal end side of each of the annular grooves 27A formed on the outer periphery of the connection end of the annular groove 25B and the branch pipe 27 with a cylindrical packing 28. With a groove joint which is integrally connected by a fastening member 30 composed of a bolt and a nut,
A branch pipe for branching the branch pipe 27 from the main pipe 26 can be provided. Although not shown, a unit used for prefabricating a water distribution pipe such as a fire extinguishing pipe or a water pipe is
In the case of manufacturing at a factory in advance, it is necessary to connect the water distribution pipe, that is, the main pipe at a right angle, but weld the end face on the opposite side of the annular groove formed in the elbow to the end face of one main pipe. The main pipe can also be connected at a right angle by a groove joint using the annular groove of the elbow and the annular groove formed on the outer periphery of the connection end of the other main pipe.

According to the present invention, the annular grooves 13 of the two support rolls 13, 14 pivotally supported by the second movable block 10 are provided.
A and 14A are fitted with the annular projection 11A of the rolling roller 11, and the outer circumferences of the supporting rolls 13 and 14 are rolled with the rolling roller 1.
By contacting the outer periphery of the roller 1, the supporting rolls 13 and 14 restrict the axial and radial swings of the rolling roller 11, so that the elbow 25 described above is used.
Annular groove 2 of the mold roll 23 when the annular groove 25B is formed.
Since the axial displacement and the radial displacement of the rolling protrusion 3A and the annular protrusion 11A on the outer periphery of the rolling roller 11 can be suppressed, the annular groove 23B of the mold roll 23 and the rolling roller 11 can be prevented. By the annular projection 11A, the elbow 25 can be reliably cantilevered without swinging. Therefore, an appropriate annular groove 25B is formed at the annular groove forming side end 25A of the elbow 25.
Can be formed, and the processing accuracy of the annular groove 25B can be improved. A high-rigidity and wide-area contact plate 2 disposed around the outer periphery of the rear end of the mold roll 23.
4 with the end face on the groove processing side of the elbow 25 in contact with
Since the elbow 25 can be rotated, the elbow 25
Will rotate in a state where the core does not run out regardless of the caliber. Therefore, the annular groove forming side end 2 of the elbow 25
An appropriate annular groove 25B can be formed in 5A, and the processing accuracy of the annular groove 25B can be improved.

In the above-described embodiment, a chamfer 23A having a small inclination angle is formed at the tip of the mold roll 23 to form the mold roll.
Although the structure in which the diameter of the mold roll 23 is reduced from the vicinity of the tip to the tip is described, the means for forming the tapered shape of the mold roll 23 to reduce the diameter from the vicinity of the tip to the tip has a small inclination angle. The shape is not limited to the chamfer 23A, but may be an arc surface formed with a predetermined radius of curvature. Further, the advance / retreat moving mechanism 3 may be constituted by a feed screw system. Furthermore, the annular groove can be formed not only in the elbow 25 but also in the end of a different member such as a straight pipe, a tee or a reducer.

[0019]

As described above, according to the first aspect of the present invention, the diameter of the front end of the mold roll is reduced from near the front end to the front end.
To allow the elbow to rotate
For elbows that were impossible with conventional grooving machines
There is an advantage that the groove processing can be performed.

According to the second aspect of the present invention, the leading end of the mold roll is formed into a tapered shape in which the diameter is reduced from near the leading end to the leading end, and the rotation of the elbow is allowed. The elbow, which was previously used , and the axial direction of the rolling roll by using multiple support rolls.
By restricting the swing in the radial and radial directions, the mold roll
Axial and half of the annular groove and the annular projection on the outer periphery of the rolling roller.
The relative displacement in the radial direction is suppressed, and the annular groove of the mold roll and the rolling roller
-The annular projection of the
Indeed, it can be cantilevered. Therefore, elbow
A suitable annular groove can be formed at the end of the annular groove
And the processing accuracy of the annular groove can be improved.
Has advantages.

According to the third aspect of the present invention, the tip of the mold roll is formed into a tapered shape in which the diameter is reduced from the vicinity of the tip to the tip, and the rotation of the elbow is allowed. The groove can be formed on the elbow, which has been previously described, and the outer periphery of the rear end of the mold roll is surrounded and arranged.
With the elbow groove processing side end face in contact with the plate,
The elbow can be rotated, so
Regardless of the rotation, the rotor rotates in a state where the core does not run out. did
Therefore, form an appropriate annular groove at the end of the elbow on the side where the annular groove is formed.
To improve the machining accuracy of the annular groove.
Can be

[Brief description of the drawings]

FIG. 1 is a side view showing a cross section of a part of a groove processing machine for a grooved elbow.

FIG. 2 is a front view of FIG.

FIG. 3 is a plan view of FIG. 1;

FIG. 4 is a side view showing a state in which an elbow is externally fitted to a mold roll.

FIG. 5 is a cross-sectional view of a state in which a rolling roller is brought into contact with the outer periphery of an end portion of the elbow on which the annular groove is formed;

FIG. 6 is a cross-sectional view showing a state in which an annular groove in a circumferential direction is formed at an end of the elbow on an annular groove forming side.

FIG. 7 is a side view showing a grooved elbow in a partial cross section.

FIG. 8 is an explanatory diagram showing an example of a partial cross section of a branch pipe using a grooved elbow.

FIG. 9 is a cross-sectional view showing an example of a pipe connected by a conventional groove joint.

FIG. 10 is a cross-sectional view showing another example of a pipe connected by a conventional groove joint.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 3 Advance / retreat movement mechanism 9 1st movable block 10 2nd movable block 11 Rolling roll 11A Annular protrusion of rolling roll 13 Supporting roll 14 Supporting roll 20 Rotating spindle 23 type Roll 23A type Chamfer of roll tip (tapered portion) 23B-shaped roll annular groove 24 Elastic plate 25 Elbow 25A Annular groove forming side end (neck) 25B Annular groove formed in elbow

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-53-30028 (JP, A) JP-A-2-42337 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16L 41/00-41/08 B21D 1/00

Claims (3)

(57) [Claims] 1. A mold roll having an annular groove formed on the outer periphery is simultaneously formed.
It is rotatably mounted on a rotating main shaft and has an annular shape of this type of roll.
The rolling roller having an annular projection that can be fitted into the groove is rotated
Pivotally supported by a movable block with an axis parallel to the main axis
And the movable block is
And move the annular protrusion of the rolling roller into the mold.
Forward / backward moving mechanism for inserting and retracting into the annular groove of the roll
Wherein the annular groove of the mold roll is provided.
The tip on the more tip side is reduced in diameter from near the tip to the tip
Grooved features characterized by a tapered shape
Lubo groove processing machine. 2. A compaction roll having an annular groove formed on the outer periphery thereof, mounted on a rotating spindle so as to be rotatable at the same time, and having an annular protrusion which can be fitted into the annular groove of the mold roll. Is pivotally supported by a movable block having an axis parallel to the rotating main shaft, and the movable block is moved forward and backward with respect to the rotating main shaft to form an annular projection of the rolling roller into the mold. b - the grooving machine provided with a reciprocating movement mechanism which is fitted-retracted from the Le annular groove, the type b - before Symbol annular groove Le
The distal end portion on the more distal end side is formed in a tapered shape whose diameter is reduced from near the distal end to the distal end , and the rolling roller is used.
A plurality of supporting rolls that are fitted and rolled relative to the
It is pivoted on the lock and these support rolls
A grooved machine for a grooved elbow, characterized in that it is configured to regulate axial and radial swings . 3. A rolling roller having an annular groove formed on the outer periphery thereof, which is mounted on a rotating spindle so as to be rotatable at the same time, and which has an annular projection which can be fitted into the annular groove of the die roll. Is pivotally supported by a movable block having an axis parallel to the rotating main shaft, and the movable block is moved forward and backward with respect to the rotating main shaft to form an annular projection of the rolling roller into the mold. b - the grooving machine provided with a reciprocating movement mechanism which is fitted-retracted from the Le annular groove, the type b - before Symbol annular groove Le
The distal end portion on the more distal end side is formed in a tapered shape in which the diameter decreases from the vicinity of the distal end to the distal end, and the outer periphery of the rear end portion of the mold roll
Abutment plate that surrounds
A grooved elbow grooving machine characterized by being arranged .