JPH0428422A - Flare machine - Google Patents

Abstract

PURPOSE:To form the flange of pipe effectively with high productivity by forcibly flaring the pipe end to the conical shape with the small angle cone in the cones attached to the front part of the driving shaft and then expanding the pipe end to the right angle with the large angle cone. CONSTITUTION:The driving shaft 4 is set at the hollow part of the piston shaft 3 of the main hydraulic cylinder 1 in freely rotative. The sub hydraulic cylinder 10 is set in the recessed part 7 of the head part 4a of this driving shaft 4, the moving component 8 is attached to the top end of this piston rod 12, the 1st cone 14 of about 45 deg. small angle is attached to this in freely rotative by the prescribed angle. Further, the 2nd cone of large angle of 90 deg. is attached to the above head part 4a in freely rotative by the prescribed angle. The pipe 17 is arranged opposite to the above head part 4a by fixing with the clamp 16. Next, by extending the piston rod 12 while rotating the driving shaft 4, the pipe end of the pipe 17 is expanded to the conical shape 17a with the 1st cone 14. After then, by extending the piston shaft 3 together with the driving shaft 4, the above pipe end is expanded to about 90 deg. with the 2nd cone, and the flange 17b is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a flaring machine for enlarging the end of a pipe to form a flange.

(Prior Art) When enlarging the end of a pipe to form a connecting flange, conventional flaring machines first press a cone at a relatively narrow angle to enlarge the end of the pipe to, for example, 37 degrees, and then So, I replaced the cone with a relatively wide-angle cone and pressed it again to spread it out to a 90-degree angle.

(Problem to be solved by the invention!!) As described above, in the conventional flare machine, two wide and narrow cones are attached and used alternately, which is time-consuming and has low productivity.

It is an object of the present invention to provide a flare machine that is equipped with two cones, a wide cone and a narrow cone, and which can be selectively used depending on the process.

(Means for Solving the Problem) In the flare machine of the present invention, a movable member is supported at the front of the drive shaft so as to be movable back and forth. This moving member is moved back and forth by a hydraulic cylinder built into the drive shaft. A first cone is rotatably attached to this moving member. The second cone is rotatably attached to the front of the rotating shaft.

(Operation) First, actuate the hydraulic cylinder to advance the movable member and therefore the first cone, press the first cone against the pipe, and spread the pipe end into a conical shape.Next, the first cone is retreated, and the second Press the cone against the vibrator and push the two-shaped end of the tube further into a right angle.

(Embodiment) In FIG. 1, reference numeral 43 denotes a hydraulic cylinder fixed to the machine base, in which a piston 2 is inserted so as to be able to slide back and forth. A piston shaft 3 integral with the piston 2 extends outward from both ends of the cylinder l.

The piston shaft 3 is formed into a hollow ξ, in which a drive shaft 4 is rotatably supported. Reference numeral 5 indicates a circle W with the drive shaft as a branch 4. The reference numeral 6 also refers to -radial bearing-C.

The rear end to the drive shaft is attached to a drive device (
(not shown) 4-joined.

The head 4a of the drive shaft 4 is formed with a cylindrical four part 7 at a position offset from the center, and a moving member 8 is mounted in the four cylindrical part 7.
is fitted and is secured with feather key 9. Therefore, the movable member 8 can only move the drive shaft head 4aζ in the front-rear direction ζ.

On the other hand, an auxiliary hydraulic cylinder 10 is provided inside the drive shaft head 4&, which is concentric with the fourth part 7, and a ξ piston 11 is provided therein.
is fitted. Piston 1 extending from piston 11
The cylinder 12 is connected to the movable member 8. The front and rear hydraulic chambers of the auxiliary hydraulic cylinder 10 (7) communicate with a hydraulic passage 13 formed inside the drive shaft l.

A narrow-angle cone (the angle of the apex is 45 degrees) 14 is rotatably provided in the L moving member 8.

The cone 14 is tilted, and the cone 14 is arranged in one direction (i.e., the apex, the bottom, the dots of the circumference J-, and the straight lines connecting them).
1) along the center line 1' to the drive shaft.

Drive shaft head/18. Furthermore, a wide-angle cone (vertex angle is 90 degrees) 15 is rotatably attached to the front end of τ.
There is. This cone is also taken as an example of ζ1, with the - side lying along the center line of the drive shaft.

Reference numeral 18 is a radial bearing that supports the head 4a of the drive shaft.

Reference numeral 1G indicates a clamp τ for fixing the vibrator 17.

Next, the effect will be explained. At the beginning, two cones 14.1
5 is in state A shown by the solid line in FIG. When in use, first, hydraulic pressure is supplied to the rear hydraulic chamber of the auxiliary hydraulic cylinder 10 while the drive shaft 4 is rotationally driven by a drive device (not shown). Then, the piston 11 moves forward, and along with this, the moving member 8 moves forward by one step, and the narrow angle cone 14 moves forward. After the cone 1/1 comes into contact with the vibrator 17, the cone 1/1 moves forward while pressing the end of the vibrator.

(state B), the end of the tube gets plastically deformed due to the movement of the cone 14, and the end of the tube is plastically deformed. Expand to an angle of 45 degrees with respect to the vibe axis as shown in j17a.

Next, hydraulic pressure is applied to the front side hydraulic chamber of the cylinder 10, and the narrow angle cone 14 is moved back to return to the A state.

This time, when hydraulic pressure is applied to the rear hydraulic chamber of main cylinder 1,
The piston 2 moves forward, and accordingly, the piston shaft 3
, drive shaft 4, and two cones 14.15 are vibrator 1
7 (state C), the wide-angle cone 15 abuts against the tube end, the tube end is further enlarged to a right angle to ζ, and a flange 17a is formed.

When the franc is completed, the drive shaft 4 is moved backward.

(Effects of the Invention) In the flare machine of the present invention, two cones are attached to the front part of the drive shaft, and the first cone is moved back and forth with respect to the drive shaft by a hydraulic cylinder. When using it, move it forward and
When using the first cone, by retracting the first cone, both cones can be used without interfering with each other. In this way, the cone attachment, which is essential to conventional flare machines, no longer needs to be replaced, improving productivity.

[Brief explanation of the drawings] Figure 1 is an explanatory diagram of the flare machine, 4...
Drive shaft 8...Moving member 10...Hydraulic cylinder 14...First cone (narrow angle cone) 15...
...Second cone (wide angle cone) 13...
pipe

Claims (1)

[Claims] 1. A drive shaft (4), a moving member (8) supported on the front part of the drive shaft so as to be movable back and forth, and a movable member (8) built into the drive shaft for moving the moving member back and forth. A flare consisting of a hydraulic cylinder (10), a first cone (14) rotatably attached to the moving member, and a second cone (15) rotatably attached to the front part of the rotating shaft. machine.