JP3448905B2 - Internal grooved pipe manufacturing equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal grooved tube manufacturing apparatus, and more particularly to an internal grooved tube manufacturing apparatus having a processing roll pressing amount adjusting mechanism for pressing a pipe to be processed.

[0002]

2. Description of the Related Art FIG. 6 shows a proposed inner surface grooved pipe manufacturing apparatus for pressing a pipe to be processed with a roll in contact with the pipe to be machined to perform grooving inside the pipe to be processed. 4-164
No. 290 has been filed by the present applicant.

In this apparatus, a rotary head 2 arranged around the pipe 1 to be processed and rotating in the circumferential direction, a backup roll 4 supported by a shaft 3 on the rotary head 2, and an inlet side of the pipe 1 to be processed are narrowed. A processing roll 5 that has a curved outer peripheral shape and is rotated by being pressed against the outer peripheral portion of the pipe 1 to be processed by the backup roll 4, and a thrust bearing 6 provided at the end of the processing roll 5 on the pull-out side of the pipe 1 to be processed. Is provided between the pulling-out portion 7 and the pulling-out portion 8 for pulling out the pipe 1 to be processed.

Further, a spiral projection 9a is formed on the outer peripheral portion inside the pipe 1 to be processed, and the grooved plug 9 is inscribed at the pressing portion of the processing roll 5 and is inscribed therein. A floating plug 10 located in contact with the inner wall of the processing pipe 1 is provided, and these are connected by a tie rod 11 and rotatably supported.

According to the above-described inner grooved pipe manufacturing apparatus, the outer diameter of the pipe 1 to be processed is reduced by being pulled out by the pulling portion 7. At this time, the floating plug 10 located inside the pipe contacts the inner wall of the pipe 1 to be processed. After that, the diameter-reduced pipe 1 to be processed moves in the drawing direction and is fed into the drawing section 8.

FIG. 7 shows a cross section taken along the line AA of the pressing portion shown in FIG. 6, and a grooved plug 9 rotatably supported by a tie rod 11 is inserted inside the pipe 1 to be processed. The processing roll 5 is pressed toward the center of the pipe 1 to be processed by the backup roll 4 on the outer peripheral portion of the pipe 1 to be processed where the grooving plug 9 is located.

When the rotary head (not shown) is rotated in the direction A shown in the figure, the backup roll 4 moves in the direction A '.
That is, while rotating in the counterclockwise direction, the trajectory of D is drawn in the clockwise direction. At this time, the processing roll 5 rotates in the B direction, draws the trajectory of C in the clockwise direction, and rotates while pressing the pipe 1 to be processed.

When the processing roll 5 presses the pipe 1 to be processed,
The spiral projection 9a formed on the outer peripheral portion of the grooved plug 9 inserted into the pipe is pressed against the inner wall of the pipe 1 to be processed. The grooved plug 9 is rotated by pulling out the pipe 1 to be processed while the projection 9a is being pressed.

As a result, an inner grooved tube 13 having a spiral continuous groove 12 is formed on the inner wall of the pipe 1 to be processed, and the inner surface grooved tube 13 is withdrawn at the withdrawing portion 8 provided in the withdrawing direction. Is reduced to a predetermined outer diameter.

In this inner grooved pipe manufacturing apparatus, the amount of pressure applied to the pipe to be processed can be adjusted by changing the outer diameters of the backup roll, the processing roll, or both rolls. Is being optimized.

[0011]

However, according to the conventional inner surface grooved pipe manufacturing apparatus, the outer diameter of the backup roll, the processing roll, or both rolls is changed when adjusting the pressing amount to the pipe to be processed. Therefore, it is necessary to prepare many backup rolls and processing rolls with different outer diameters. Therefore, roll management is troublesome, roll replacement work is troublesome, and fine adjustment of the pressing amount is difficult. Therefore, an object of the present invention is to provide an inner grooved pipe manufacturing apparatus capable of easily finely adjusting the pressing amount and reducing the tool type and the management labor.

[0012]

The present invention has the above-mentioned object.
Since Accomplish positioned in contact with the inner surface of the processed portion of the processed pipe, a groove cutting plugs with the outer circumference of the grooved portion corresponding to the inner surface groove, wherein the outer circumference of the processed portion of the work pipe position, and the plurality of first roll revolves while rotating in the work tube concentric circular locus on, between the inner of said first roll of said plurality and the outer surface of the processed portion of the work pipe located in a space formed by receiving the rotational force by contact with the plurality of first roll plurality of second revolves while rotating on a small circular path of radius becomes smaller than the circular locus roll and a rotating head revolving said plurality of first roll on the circular path, a plurality of first supported so as to be secured by a predetermined angular rotation to said rotary head
Of the roll mounting shaft fixing part and the plurality of first rolls
While rolling rotatably supported, said plurality of <br/> first roll center axis setting Keru multiple first eccentric position relative to the central axis of the plurality of first roll mounting shaft fixing portion An inner surface grooved tube manufacturing apparatus comprising a roll mounting shaft.

Further, the present invention in order to achieve the above object, a plurality of first gear fixed to the first roll mounting shaft fixing portion of the plurality in addition to the configuration described above, and adjacent said plurality Is provided between the first gears of the
A rotation angle transmission means having a plurality of second gear meshing with the first gear, an inner grooved tube, characterized in that it comprises a display means for displaying the predetermined angle of the first roll mounting shaft fixing portion A manufacturing apparatus is provided.

[0014]

According to the present invention, the first fixed to the rotary head
The central axis of the first roll mounting shaft, which is eccentrically provided with respect to the central axis of the first roll mounting shaft fixing portion, is displaced based on the amount of eccentricity by rotating the roll mounting shaft fixing portion at a predetermined angle. . The pressing amount of the second roll is adjusted by the radial component of the eccentric amount of the pipe to be processed.

[0015]

[Embodiment 1] Hereinafter, an inner grooved pipe manufacturing apparatus of the present invention will be described in detail with reference to the drawings. Portions having the same configurations as those in FIG. 6 are denoted by the same reference numerals and reference numerals, and thus redundant description will be omitted.

FIG. 1 shows an embodiment of an inner surface grooved pipe manufacturing apparatus of the present invention, in which a backup roll 4 is rotationally fixed to a backup roll mounting shaft 14 which is integrally formed with a rotary head mounting portion 15. To be done. Rotating head mounting part 15
Is fixed to the gear 16 and is attached to the rotary head 2 so that it can be rotated by an arbitrary angle and fixed.

FIG. 2 is a front view of the backup roll mounting shaft 14 and the rotary head mounting portion 15, and FIG. 3 is a side view of FIG. A scale portion 15A for displaying the rotation amount is provided on the outer peripheral portion of the rotary head mounting portion 15.

The center axis O'of the backup roll mounting shaft 14 is offset from the axis O of the rotary head mounting portion 15 and has an eccentricity A. This eccentricity is given in order to adjust the pressing amount of the processing roll (not shown), and a small amount of, for example, 0.06 mm is sufficient.

FIG. 4 is a sectional view taken along line AA of FIG. In the figure, the processing roll 5 and the tie rod 11 located inside the pipe 1 to be processed are omitted. A rotary head mounting portion 15 is arranged on the rotary head arranged around the pipe 1 to be processed.

The gears 16 fixed to the respective rotary head mounting portions 15 have the same number of teeth, and are interlocked by meshing with adjacent gears 16 with a gear 17 having a small number of teeth interposed. The gears 16 and 17 may be arranged so that the rotation of one rotary head mounting portion 15 is transmitted to each rotary head mounting portion 15.

The operation of the inner grooved tube manufacturing apparatus of the present invention will be described below.

The eccentricity is adjusted by rotating any one of the plurality of backup roll mounting shafts 14 around the shaft O. At this time, when one of the backup roll mounting shafts 14 is rotated by a predetermined angle while checking the scale portion 15A provided on the rotary head mounting portion 15, all the backup roll mounting shafts 14 meshed by the gears 16 and 17 are rotated. Rotate in the same direction and at the same angle.

Based on this rotation, the eccentricity of the backup roll mounting shaft 14 changes, the backup roll 4 moves in the radial direction of the pipe 1 to be processed, and the revolution radius of the backup roll mounting shaft 14 with respect to the pipe 1 to be processed changes. To do. As a result, the amount of radial movement of the processing roll 5 that comes into contact with the backup roll 4 and presses the pipe 1 to be processed with respect to the pipe 1 to be processed increases or decreases, and the amount of pressing of the processing roll 5 can be adjusted.

As a result, the pressing amount can be easily fine-tuned and stable groove cutting can be performed. Figure 4
Shows that the backup roll mounting shaft 14 has the maximum eccentric amount in the center direction of the pipe 1 to be processed, the radius of rotation with respect to the pipe 1 to be processed is the smallest, and the pressing amount is the highest.

FIG. 5 shows another embodiment of the present invention, in which one of the gears 17 interposed between the gears 16 is fixed with a scale plate 18 indicating the rotation amount of the backup roll mounting shaft 14.

When the scale plate 18 is attached to the gear 17 having a small number of teeth, when the gear 17 is rotated, the backup roll mounting shaft 14 is rotated by a slight amount to facilitate fine adjustment of the pressing amount. Good grooving workability can be imparted.

[0027]

As described above, according to the inner grooved tube manufacturing apparatus of the present invention, the eccentric amount of the first roll is adjusted to adjust the first roll.
Since the pressing amount of the second roll is adjusted, it is easy to finely adjust the pressing amount, the number of rolls can be reduced to a small number, the management effort can be reduced, and the quality of the tools is stable with a small variety of tools. Inner grooved tubes can be manufactured.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of an inner grooved tube manufacturing apparatus of the present invention.

FIG. 2 shows a front view of a backup roll mounting shaft 14 and a rotary head mounting portion 15 of the inner grooved tube manufacturing apparatus of the present invention.

FIG. 3 shows a side view of a backup roll mounting shaft 14 and a rotary head mounting portion 15 of the inner grooved tube manufacturing apparatus of the present invention.

FIG. 4 is an explanatory view showing an AA cross section of FIG. 1 in the embodiment of the inner grooved pipe manufacturing apparatus of the present invention.

FIG. 5 is an explanatory view showing another embodiment of the inner grooved tube manufacturing apparatus of the present invention.

FIG. 6 is an explanatory view showing a conventional inner surface grooved pipe manufacturing apparatus.

FIG. 7 is an explanatory view showing an operation in a cross section AA of the conventional inner grooved pipe manufacturing apparatus.

[Explanation of symbols]

1 Pipe to be Processed 2 Rotating Head 3 Shaft 4 Backup Roll 5 Processing Roll 6 Thrust Bearing 7, 8 Drawing Part 9 Grooving Plug 9a Protrusion 10 Floating Plug 11 Tie Rod 12 Groove 13 Inner Grooved Pipe 14 Backup Roll Mounting Shaft 14 15 Rotation Head mounting part 15A Scale parts 16,17 Gears 18 Scale plate

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI B21D 17/00 B21D 17/00 (72) Inventor Kenji Yokomizo 3550 Kitayo-cho, Tsuchiura-shi, Ibaraki Hitachi Densen Co., Ltd. System Material Research In-house (72) Inventor Hiroki Chiba 3550 Kidayo-cho, Tsuchiura-shi, Ibaraki Hitachi Cable, Ltd. System Material Research Laboratory (56) Reference JP-A-60-244421 (JP, A) JP-A-62-263820 (JP, A) JP-A-3-216211 (JP, A) Actually open 59-85618 (JP, U) Actually open 1-96209 (JP, U) Actually open 63-138906 (JP, U) Actual Kaihei 1-96210 (JP, U) Actual Kaihei 1-68109 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B21D 17/04 B21C 1/22 B21C 3/08 B21C 3/16 B21C 37/20 B21D 17/00

Claims (3)

(57) [Claims] 1. A grooving plug which is located in contact with an inner surface of a processed portion of a pipe to be processed and has a grooved portion on the outer periphery according to an inner surface groove, and an outer peripheral direction of the processed portion of the pipe to be processed. Between a plurality of first rolls which are located on the outer surface of the processed portion of the pipe to be processed and the insides of the plurality of first rolls, the plurality of first rolls revolving on a circular locus concentric with the pipe to be processed. A plurality of second rolls which are located in the space formed by the second roll and which revolve while rotating on a small circle locus having a radius smaller than that of the circle locus by receiving its rotational force by coming into contact with the plurality of first rolls. roles and a rotating head revolving said plurality of first roll on the circular path, the plurality being supported to stick by a predetermined angular rotation to the rotary head first roll mounting shaft fixing portion When rotatably supporting the plurality of first roll Both the
In, and a first roll mounting shaft central axis <br/> setting Keru plurality of said plurality of first roll eccentric position with respect to the central axis of the plurality of first roll mounting shaft fixing portion An inner grooved pipe manufacturing apparatus characterized by being provided. 2. A grooving plug, which is located in contact with the inner surface of the processed portion of the pipe to be processed and has a grooved portion on the outer periphery corresponding to the inner surface groove, and an outer peripheral direction of the processed portion of the pipe to be processed. Between a plurality of first rolls which are located on the outer surface of the processed portion of the pipe to be processed and the insides of the plurality of first rolls, the plurality of first rolls revolving on a circular locus concentric with the pipe to be processed. A plurality of second rolls which are located in the space formed by the second roll and which revolve while rotating on a small circle locus having a radius smaller than that of the circle locus by receiving its rotational force by coming into contact with the plurality of first rolls. roles and a rotating head revolving said plurality of first roll on the circular path, the plurality being supported to stick by a predetermined angular rotation to the rotary head first roll mounting shaft fixing portion When rotatably supporting the plurality of first roll Both the
In a first roll mounting shaft central axis <br/> setting Keru plurality of said plurality of first roll eccentric position with respect to the central axis of the plurality of first roll mounting shaft fixing portion, a plurality of first gear fixed to the first roll mounting shaft fixing portion of the plurality, and the first of said plurality of adjacent arranged between the gear of the plurality of meshing with the plurality of first gear An inner grooved tube manufacturing apparatus comprising a rotation angle transmission means having a second gear. 3. A grooving plug which is located in contact with the inner surface of the processed portion of the pipe to be processed and has a grooved portion on the outer periphery according to the inner surface groove, and an outer peripheral direction of the processed portion of the pipe to be processed. Between a plurality of first rolls which are located on the outer surface of the processed portion of the pipe to be processed and the insides of the plurality of first rolls, the plurality of first rolls revolving on a circular locus concentric with the pipe to be processed. A plurality of second rolls which are located in the space formed by the second roll and revolve while rotating on a small circle locus having a radius smaller than that of the circle locus by receiving the rotational force by coming into contact with the plurality of first rolls. roles and a rotating head revolving said plurality of first roll on the circular path, the plurality being supported to stick by a predetermined angular rotation to the rotary head first roll mounting shaft fixing portion When rotatably supporting the plurality of first roll Both the
In a first roll mounting shaft central axis <br/> setting Keru plurality of said plurality of first roll eccentric position with respect to the central axis of the plurality of first roll mounting shaft fixing portion, a plurality of first gear fixed to the first roll mounting shaft fixing portion of the plurality, and the first of said plurality of adjacent arranged between the gear of the plurality of meshing with the plurality of first gear An inner surface grooved pipe manufacturing apparatus comprising: a rotation angle transmission means having a second gear; and a display means for displaying the predetermined angle.