JPS60130424A - Forming device of pipe end - Google Patents

Abstract

PURPOSE:To provide various kinds of forming work to the end part of pipe efficiently at low initial cost by providing the 1st and 2nd forming surfaces to a rotational body and making the 1st and 2nd positions freely changeable and fixable in constituting a titled device. CONSTITUTION:In flaring work, the 1st forming surface F1 is made to act on the end part of a pipe 2 to be worked throughout its whole circumference in order to expand the end part into a trumpet shape, while moving the conical surface F1 to the direction of the center X of rotating axis in a state of fixing the surface F1 to the 1st position. In belling work, the 2nd forming surface F2 in a state of intersecting perpendicularly with the center X of rotating axis, is made to act on the pipe 2 end-part expanded into the trumpet shape in order to form a flange part, while moving the surface F1 to the direction of the center X after finishing the flaring work and displacing and fixing the surface F1 to the 2nd position. In rounding work, the pipe 2 formed to have a conical shape at its front end and a columnar shape as a whole, and the pipe 2 end is formed into a perfectly round shape by making the surface F2 act on the inner circumferential surface throughout its whole circumference.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides, for example, as shown in FIG. tube(
2) Inward step part (1m) of the connection plug +11 at the end
A pipe end that is processed by expanding a retaining flange (2a) that can be brought into contact with a water pipe, or by modifying the end of a water pipe to a perfect circle or changing its diameter for connection, etc. The present invention relates to a part forming processing device.

To be more specific, the forming of the pipe end generally includes (a) flaring, (b) flange forming, flange forming, and rounding. Conventionally, dedicated processing equipment equipped with molding tools as shown in the respective methods has been used.

That is, the processing in (a) uses a conical member whose top is located on the axis of rotation.

Processing in (b)... After processing in (a) above,
Use one with an inverted T-shaped member.

(c) Machining: A member having a tapered surface at the tip and a cylindrical or cylindrical member having an outer diameter approximately equal to the inner circumferential diameter of the pipe to be processed is used.

(2) Machining: A cylindrical or cylindrical member having a tapered surface on the tip side and having a predetermined diameter larger than the inner circumference of the pipe to be processed is used.

However, in the case of carrying out the above mentioned (b),
When transitioning from the processing in (a), it is necessary to replace the conical member with an inverted T-shaped member, which requires a lot of effort and has the drawback of low efficiency in forming operations. there were.

In addition, in the processing of each of the above-mentioned e→ and 2), although the same shape is used for the cylindrical or cylindrical member, it is possible to process the parts according to the diameter of the pipe to be processed or the diameter to be enlarged. In order to accommodate this, it is necessary to prepare a large number of specialized devices with different diameters and to replace them, which is extremely uneconomical due to high initial cost, and requires a lot of effort to replace. This had the disadvantage of reducing work efficiency.

In view of the above points, it is an object of the present invention to make it possible to carry out various molding operations on tube ends with low initial cost and with high efficiency.

In order to achieve the above-mentioned purpose, the pipe end forming apparatus of the present invention has a fixing member fixedly positioned relative to the pipe to be processed, while rotating around an axis corresponding to the center of the pipe to be processed. A rotating member is provided so as to be movable in a direction along the rotational axis, and the rotating member is provided with first and λ-shaped surfaces at different positions in the direction along the rotational axis, and 1. A forming member is displaced along the entire circumference of the end while contacting the inner circumferential surface of the pipe to be processed; It is characterized in that it is configured to be able to be freely changed in position and fixed to a second position where the third conical surface is applied by entering the pipe.

The effects of the above feature configuration are as follows.

In other words, when flaring as described in (a) above, the conical first forming member is fixed at the first position and moved in the direction of the rotation axis, and the first forming member is moved to the end of the pipe to be processed. It acts over the entire circumference of the tube, pushing the end of the tube into a trumpet-like shape.

In the above-mentioned (b) punching process, after the above-mentioned flaring process, the first molding surface is displaced and fixed in the second position, and in that state, while moving in the direction of the rotation axis, it is pushed out into a trumpet shape. The second and second forming members perpendicular to the rotational axis are applied to the pipe end portion thus formed, thereby forming a flange portion perpendicular to the rotational axis. When machining the perfect circle as shown in e→ above, the first shape is provided with a conical tip and a cylindrical surface as a whole, and the first forming surface is rotated while being fixed at the first position. While moving in the axial direction, the first Fft-shaped surface acts on the inner circumferential surface of the pipe to be processed over the entire circumference of the end, thereby making the end of the pipe perfectly circular. Then, during the tube expansion process described in (a) above, the first position to be fixed is appropriately changed by the same first forming process as in the case (c) above, and the end of the tube is expanded by the same action. It is.

The effects of the above action are as follows.

In other words, by simply displacing the first molding surface in the direction intersecting the rotation axis, and changing the fixed position from the ¥J/ position to the fifth position, one flange can be removed without any replacement operation. Processing can be easily performed, and when switching from round processing to tube expansion processing, etc., the first position where the first forming surface acts on the tube end itself is h, and the fixed position is changed to the multi-piece position. With K, it is possible to process both a perfect circle and a tube expansion using the same first forming process without replacing with different parts, and it can be easily handled even if the diameter of the pipe to be processed is different. By moving the first FR cedar surface along the entire circumference of the end of the pipe at a position offset from the rotational axis of the rotating member, various forming processes on the end of the pipe can be performed using the apparatus. By simply replacing some of the molding tools while still using most of them, the initial cost is low and the process can be carried out efficiently.

Hereinafter, embodiments of the present invention will be described in detail based on illustrative drawings.

[First Example] Fixing member (5) in which +41 is connected to the fixing grip 1111
A K screw shaft (6) is screwed into the lower end of the screw shaft (6) so that it can rotate freely around the rotation axis (P) offset from X+ of the screw shaft (6). The support member (7) is attached to a first bite-shaped member (
8) is provided protrudingly, and the rotational axis fXl of the screw shaft tel is
a second molded member (F,) having a second molded surface (F,) orthogonal to
9) is rotatably attached to the support member (7) via a pole bearing (10), and the fixed member (5
) is attached with a gripping mechanism (river) for gripping the tube to be processed (2), and constitutes a tube end forming device.

A handle (l) is attached to the upper end of the screw shaft (6) via a ratchet mechanism (02), and the user holds the fixing grip (4) with one hand and swings the handle (0 barrel) back and forth with the other hand. It is configured so that the screw shaft (6) can be screwed downward by operation.

Although not shown, the ratchet mechanism (12) has a handle (
A mechanism is provided to switch the direction in which the operating force is applied to the field, and by switching the mechanism, the screw shaft (6) can be screwed upward in conjunction with the reciprocating swing operation of the handle.

A rotary support shaft 04) is protruded above the support member (7), and is fitted into a hole (I) formed in the lower part of the screw shaft (6) so as to be rotatable around the rotation axis fP1. , and a positioning pin is provided protrudingly below the screw shaft (6), and is tilted toward the support member (7) side on the circumference around the rotation axis (Pl) of the support member (7). A large number of retaining holes (17a), (17b)-(17h) are located at predetermined locations of 9!
It's being crotched. In the figure, (18) is a bolt that locks into an annular groove (19) formed in the rotation support shaft (I4) to prevent the support member (7) from being removed.

First, we will explain the flaring process using the above configuration. As shown in FIGS. 3 and 4, one positioning pin (one
6) into the predetermined retaining hole (17a) and fixed in position, the first forming member (F,) is attached to the outer periphery of the end of the pipe to be processed (2) fixed by the gripping mechanism (II). By screwing the screw shaft (6) downward in this state, the first forming member (Fl) contacts the entire circumference of the end of the pipe to be processed (2) and threads the pipe (2). It moves downward in the direction of the rotational axis fXl of the shaft (6) and spreads out the end of the tube to be processed (2) in a trumpet shape.

Next, to explain the flaring process for forming the flange part, after the above-mentioned flaring process, as shown in FIG. 45 and FIG. Rotate the rotational support shaft (I4) around the rotational axis (F1), and insert the positioning pin (111) into another predetermined retaining hole (
17e) - The first molded member (8) is fitted into the support member (7) and fixed in position by the stopper, and the first molded member (8)
By screwing the threaded shaft (6) downward in this state, a second screw is inserted into the end of the pipe to be processed (2) which has been expanded into a trumpet shape. Molding surface (
F2) to align the end of the pipe to be processed (2) with the rotation axis 1.
The flange (2a) is formed by expanding it to a state that is perpendicular to XI or close to it.

In any of the above-mentioned molding using the first and second molding surfaces (Fl) and (F2), the ball bearing (10)
This prevents the first and second hook-shaped members +81 and +91 from rotating relative to the support member (7) and sliding against the end of the pipe to be processed (2) and damaging its surface.

Next, to explain the process of perfect circular machining, as shown in FIG. (F2) is attached to a cylindrical or cylindrical formed member (2Q) having a formed part (Fl), and the cylindrical surface (F2) of the formed member is ) by rotating the support member (7) and inserting the positioning pin (161) into the predetermined retaining hole (17d),
(17f) Insert into middle e to fix the position, and screw shaft (6)
By rotating the forming member, the tube to be processed (2
) is moved in the direction of the rotational axis (Xi force) to correct it to a predetermined perfect circle.

To explain the tube expansion process, the two-dot chain line (Ll
), the support member (7) is rotated and the positioning pin 06) is positioned so that the cylindrical shape (f2) of the molded member (2O) is located on the larger diameter side than in the above-mentioned perfect circular processing. By inserting the molding member (20) into the predetermined retaining holes (17b) and (17h) into the fist and fixing the position, and rotating the screw shaft (6), the molded member (20) is attached to the end of the pipe to be processed (2). While contacting the outer periphery, it is moved in the direction of the rotation axis txt to enlarge the diameter of the portion of the end of the tube to be processed (2) that spans a predetermined length K in the tube axis direction. This tube expansion process is performed when, for example, in order to fit and connect two tubes to be processed (2) of the same diameter, the diameter of one of the tubes to be processed (2) is expanded by an amount equivalent to its wall thickness. It is carried out in Moreover, double flaring processing can be performed by folding the end portion of the pipe to be processed (2) into a dogleg-shaped cross section over all 8 parts by using the No. 4 forming member (9).

To configure the gripping mechanism (11), as shown in FIG. 8, a gripping member (21) is pivotally connected to a fixed member (5) so as to be swingable around a vertical axis (Q,). , 9 engagement grooves (22) are disposed on the free end side of the gripping portion vfall, and on the other hand, a vertical axis core (swingable around the electric current and detachable between the retaining grooves) is disposed on the fixed member (5). A bolt (b) is pivotally connected,
In addition, the wing nut 4) is screwed onto the bolt (B), the workpiece tube (2) is held between the fixing member (5) and the gripping member 4), and the bolt t231 is engaged with the engagement groove (22). It is configured to hold the pipe to be processed (2) under pressure by tightening it with a hinged motion.

[Embodiment 4] As shown in FIGS. 9 and 10, a circumference hK of a predetermined diameter centered on the rotation axis (P) of the support member (7) is provided on the upper end surface of the support member (7). A large number of retaining recesses (25a
), (25b)...(25h) are formed into nine crotches, and on the other hand,
Lower end side K of screw shaft (6), said retaining recess (g5a)
A rond member (7) is selectively engaged and disengaged, and a compression coil spring is provided that presses and biases the Rondo member (7) to displace it to the engagement side. Although the support member (7) can rotate integrally with the shaft (6), when changing the forming process described in 1, the support member (7) is manually rotated without receiving any reaction force from the pipe to be processed (2). Threaded shaft (6) of the support member (7) as in the first embodiment
The structure is such that the fixed position can be easily changed without having to perform near and far operations.

[First Embodiment] As shown in FIGS. 11 and 12, a dovetail groove 9) is formed in the lower part of the screw shaft (6), and a T is connected to the support member (7). The letter-shaped member ('i! A wavy locking portion (31) is formed at the upper part of one end of ), and the supporting member (7) is fixed in position at a predetermined position by selectively locking to the wavy locking portion (31). When removing, a stop plate (c) is attached to the screw shaft (6), and the fixing position of the first molding surface (F,) is aligned with the rotation axis fXl of the screw shaft (6).
while changing the direction perpendicular to the first molded member (8
) by attaching the above-mentioned molding member (20), etc., so that various molding processes can be performed.

Also in the above-mentioned first to Jth embodiments, the screw shaft (6),
A support member (7), a first and a second molded member (8).

(9), or one in which a molded member is used in place of the first molded member (8) in the above configuration is referred to as a rotating member.

In addition, whether the first rod-shaped member (8) or the molded member is deviated from the rotation axis (Xl) of the screw shaft (6), the groove-shaped member (8) or the molded member is covered. Processed pipe (2
) is displaced along the outer periphery of the end thereof, collectively referred to as the first position, while the first molded member (8) is inserted into the pipe to be processed (2) in a non-contact manner. The position where this is possible is called the fourth position.

In addition, in the present invention, for example, as shown in FIG. 13, the screw shaft (6) is attached to the fixing member (5) so as to be rotatable around the horizontal axis, and the screw shaft (6) is It is also possible to drive the steel pipe (2) in the forward and reverse directions using an electric motor or the like.In this case, the steel pipe (2) is transported to a position corresponding to the screw shaft (6) using various transport tools. In this way, the diameter, 20 (to), /m or more, etc.
It can also process large diameter items.

In the present invention, a motor is interlocked and connected to the screw shaft (6) in place of or in combination with the handle (13) to screw the screw shaft (6), and the screw shaft (6) is driven by a motor. It may be made to spirally advance.

Further, in the above embodiment, the gripping mechanism (11) is connected to the fixing member (
5), but in the present invention, for example, a holding mechanism is provided on a fixing base separate from the fixing member (5), and the fixing member (5) is detachably attached to the fixing base. It may be fixed.

[Brief explanation of the drawing]

The drawings show an embodiment of the tube end forming apparatus according to the present invention, FIG. 1 is a partially cutaway side view showing a pipe to be processed, FIG. 2 is a partially omitted overall side view of the first embodiment, 3 is an enlarged sectional view of the main part of FIG. 2, FIG. 4 is a partially omitted view taken along the line ■-■ in FIG. 3, FIG. 5 is a side view illustrating the forming process switching state, and FIG. The figure is a side view of the machining state, Figure 7 is a side view of the molded member attached for rounding, and Figure 8 is @
2 is a sectional view taken along the line ■-■, FIG. 9 is a sectional view of the main part of the λth embodiment, FIG. 10 is a partially omitted view taken along the line X-X in FIG. 9, and FIG. A sectional view of the main part of the embodiment, FIG. 12 is the 11th
Fig. 13 is a schematic side view showing the drive type. (2)...Pipe to be processed, (5)...Identification member, (X)...Rotation axis, (Fl)...
...First formation, (Fρ...Second formation. Agent: Patent attorney Osamu Kitamura Figure 9 Figure 11 Figure 10 Figure 12

Claims (1)

[Claims] A fixing member (5) fixedly positioned relative to the pipe to be processed (2)
A rotating member is provided to be movable in a direction along the rotation axis (Xi) while rotating around the axis 1XI corresponding to the center of the pipe to be processed (2), and the rotation axis (XI) is attached to the rotation member. First and second molding surfaces (Fl) and (Fρ are provided at different positions in the direction along Xi, and the first molding surface (Fl)
a first position in which it is displaced along the entire circumference of its end while contacting the inner circumferential surface of the pipe to be processed (2), and a second position in which it is displaced in a direction intersecting the rotational axis 1XI from that position. A tube end forming apparatus characterized in that the tube end forming apparatus is configured such that the position can be changed and fixed to the 4 m position where the curvature is applied by inserting it into the processed tube (2).