JPH0651350B2 - Tube flare processing machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding flare processing machine in which the tip of a plastic tube material is expanded and the expanded diameter portion is bent toward the tube.

[0002]

2. Description of the Related Art For example, as shown in FIGS. 5 and 6 of the accompanying drawings, a folded flare portion 51 is formed on the tip end side of a tube 50 as a joint structure having a high sealing property for a plastic tube. A tapered wedge ring 53 is fitted into the folded groove portion 52 of the portion 51, and then the cap nut 55 is screwed to the joint body 60 to integrally clamp the wedge ring 53 and the tube 50. Proposed. According to this structure, the folded flare portion 51 at the tip of the tube 50 is pressed tightly against the joint body 60 by the wedge ring 53 and can be firmly sealed.

The folded flare portion 51 in the structure described above.
In order to obtain the above, in the related art, after heating the tip of the tube 50 to near the melting temperature to soften it, the tip is expanded and folded back toward the outside of the circumference. However, in this conventional method, Since it is a manual work, it is complicated and the work efficiency is not improved, and it is also made of fluororesin or PF.
A tube made of a resin having high heat resistance such as A was very difficult to be folded back. Further, there are often problems that the tube body is deteriorated by heating and that the shape of the flare portion is distorted.

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems, and is a novel processing apparatus capable of extremely easily expanding the diameter of the tip of a tube material and processing it into a folded flare shape. Is proposed.

[0005]

That is, the present invention is
Retaining member for a tube material to be processed having a fold-back mold part on the tip side, which has a fold-back portion formed by a taper tube portion having an acute angle for defining a fold-back groove shape of a flare portion of the tubing material to be processed, and fold-back of the holding member A small-diameter portion that is provided so as to be able to move forward and backward facing the mold part and is inserted inside the tube material to be processed at the tip side, and a diameter gradually increasing continuously to the small-diameter portion to flare the tube material to be processed. Expanding member having a tapered large diameter part for expanding the diameter in a circular shape, and provided in the expanding member so as to be able to move forward and backward, and contact the expanded flare portion of the tube material to be processed to hold the holding member. A fold-back flare processing machine for a tube material, comprising a fold-back member having a large-diameter tubular tip portion having a curved surface that folds back the flare portion along the fold-back portion.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows a cross section of a folded flare processing machine showing an example of the present invention, and a sectional view showing a state in which a tube material is expanded in diameter by the device of the present invention, and FIG. 2 shows a folded flare portion of the tube material by the device of the present invention. 3 is a sectional view showing a state in which the flared portion is expanded, FIG. 3 is an enlarged sectional view of an essential portion showing an initial state of folding back of the flared portion, FIG. 4 is an enlarged sectional view of an essential portion showing a folded state, and FIG. FIG. 6 is an exploded perspective view showing a joint structure using a tube material, and FIG. 6 is a sectional view showing the joint structure.

As shown in FIG. 1, the tube flare processing machine 10 of the present invention comprises a holding member 20, a diameter expanding member 30, and a folding member 40.

The holding member 20 holds the tube material 60, which is a member to be processed. In the illustrated embodiment, the holding member 20 is formed on one arm 12 of the body block 11 formed in a U shape. This holding member 20 is the main body block 11
The fixed part 2 is composed of a fixed part 21 and a movable part 22 which is moved by a known clamping means (not shown).
1 and the movable portion 22 are clamped to the sandwiching portion 23.
Is pinched. The holding member 20 has a folded-back portion formed of an acute-angled tapered cylindrical portion that is connected to the holding portion 23 inside the main body block 11 and defines a folded-back groove shape at the end portion 61 of the processed tube material 60. A mold part 25 is formed. The folded back mold portion 25 of the embodiment is composed of a fixed half cylinder portion 25A and a movable half cylinder portion 25B.

The expanding member 30 is screwed to the other arm 13 of the U-shaped main body block 11 as shown in the drawing, and the folded-back portion 25 of the holding member 20 is directed inward of the main body block 11. It is provided so as to be able to move forward and backward opposite to. Reference numeral 31 in the drawing is a body portion of the diameter expanding member, 32 is a handle portion, and
Reference numeral 3 denotes an external thread portion engraved on the main body portion 31, and reference numeral 15 denotes an internal thread portion of the main body block 11 screwed with the external screw portion 33.
At the tip of the main body 31 of the diameter expanding member 30, a small diameter portion 35 to be inserted inside the tube material 60 to be processed, and the small diameter portion 35.
The tapered large-diameter portion 36 is formed so as to continuously increase the diameter and expand the tube material 60 to be processed into a flare shape.

The folding member 40 is composed of a tubular body portion 41 and a tubular tip portion 42, and as will be better understood from FIG. 1 and FIG. 2 showing its operating state, the diameter expanding member 30.
It is provided so as to be able to move forward and backward by being screwed onto the outer threaded portion 33 of the main body 31. Reference numeral 43 is an inner threaded portion that is screwed into the outer threaded portion 33 of the diameter-expanding member main body 31. The tip of the tubular tip portion 42 of the folding member 40 is configured by a large-diameter curved surface 45, and abuts the flared portion 62 of the tubular material distal end portion 61 to be expanded to make the flare portion 62 into the folded type. Bend along section 25.

Next, the operation of the device of the present invention will be described. As shown in FIG. 1, the tube material 60 to be processed is held by the sandwiching portion 23 of the holding member 20 so that the tip portion 61 thereof protrudes from the folded back mold portion 25 by a predetermined length. The protruding length of the tip end portion 61 of the tube material to be processed is a portion to be flared and is predetermined. Also, the tube material 6
The holding of 0 is securely performed by a known clamp mechanism.

Next, as shown below the chain line in FIG.
By rotating the handle 32 of the diameter expanding member 30, the main body 31
By inserting the small diameter portion 35 at the tip thereof into the tube material tip portion 61 to be processed, and further by advancing the tapered large diameter portion 36 connected to the small diameter portion 35. The diameter of the processed tube material tip portion 61 is gradually increased. In this embodiment, the diameter expanding member 30 is rotated by turning the handle 32.
Although it is moved forward, it is also possible to use the power of a known motor or the like. Further, a heater or the like may be built in the small diameter portion 35 to moderately heat and soften the tip end portion of the tube material to expand the diameter.

Further, as shown in the upper half of FIG. 2, the diameter-expanding member 30 is advanced so that the shoulder portion 37 of the tapered large-diameter portion 36 serves as the tube material 60 and the tip 26 of the folded mold portion 25.
The tip end portion 61 is flared so as to flare.

Next, as shown in the lower half of FIG. 2 and FIGS. 3 and 4, the flared portion 62 of the expanded tube material 60 is folded back. That is, the tubular body portion 41 of the folding member 40 is rotated, and the folding member 40 is folded.
Move forward while rotating in the direction. As can be better understood from FIGS. 3 and 4, since the tip of the tubular tip end portion 42 of the folding member 40 is formed by the curved surface 45, the curved surface 45 is formed as the folding member 40 rotates and advances. 45 begins with its tip 4 as shown in FIG.
5A contacts the expanded flare portion 62 and is bent rearward, and then presses the flare portion 62 against the surface of the folded mold portion 25 of the holding member 20 at the curved surface lower portion 45B as shown in FIG. And turn back. Folded type part 2
Since the tip portion of 5 is formed in an acute angle, the tube material is formed in a flare shape having an acute angled folded groove shape.

[0015]

As shown and described above, according to the tube flare processing machine of the present invention, the tube flare processing can be performed extremely easily, easily and surely. According to the present invention, as in the conventional case, since the tube material can be bent in advance without heating and softening the tube material in advance, the tube material is not deteriorated, and the fluorine resin or the like which has conventionally been difficult to perform this kind of processing is used. It has become possible to easily and efficiently perform the folding process using a heat resistant resin or the like.

Further, in the case where the expanding member and the folding member are pushed in while rotating, uniform flare processing is possible, the precision of the folding groove shape is improved, and the quality of the tube material used for the joint structure is improved. Can be achieved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a cross section of a folded flare processing machine showing an example of the present invention and a state in which a tube material is expanded in diameter by the device of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a folded flare portion of a tube material is formed by the device of the present invention.

FIG. 3 is an enlarged cross-sectional view of an essential part showing a state in which the flared portion whose diameter has been expanded is folded back.

FIG. 4 is an enlarged cross-sectional view of an essential part showing a folded state.

FIG. 5 is an exploded perspective view showing a joint structure using a tube material according to the device of the present invention.

FIG. 6 is a sectional view showing a joint structure of the same.

[Explanation of symbols]

 10 Folding flare processing machine 20 Holding member 25 Folding mold part 30 Expanding member 35 Small diameter part 36 Tapered large diameter part 40 Folding member 42 Cylindrical tip part 45 Curved surface 62 Flare part

Claims (2)

[Claims] 1. A holding member for a tube material to be processed, which has a fold-back mold part on the distal end side, the fold-back part having an acute-angled tapered cylindrical portion for defining the shape of a fold-back groove of an acute-angled fold-back flare portion of the tube-work material. A small-diameter portion that is provided so as to be able to move forward and backward facing the folded-back portion of the holding member and that is inserted into the inside of the tube material to be processed at the tip side, and the diameter gradually increases continuously to the small-diameter portion. A diameter-expanding member having a taper-shaped large-diameter portion for diameter-expanding the processed tube material, and a forward-backwardly-movable member provided on the diameter-expanding member to contact the expanded flare portion of the tube material to be processed. A fold-back flare processing machine for tube material, comprising: a fold-back member having a large-diameter cylindrical tip portion having a curved surface that folds back the flare portion along the fold-back portion of the holding member. 2. The tube flare processing machine according to claim 1, wherein the diameter expanding member and the folding member move forward and backward while rotating.