JP2001041365A - Stub end and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stub end and its manufacture, capable of dissolving degradation in operating performance in manufacture, and obstacle caused by deterioration in cost saving. SOLUTION: Metallic parent material 5 such as stainless is so constituted that a brim part 2 to be continued to the base end of a short pipe part is formed up in a state that the base end periphery of the inner circumferential surface 3 of the short pipe 1 is perpendicularly intersected with the inner circumferential periphery of the outer side surface 4 of the brim part 2, and the short pipe part is elongeted longer by applying pressure to the short pipe part 1 of the parent material to the direction perpendicular to the axis of the short pipe part, after that, a stub end is brought to perfection by providing a groove 7 for a place close to the tip end of an elongated part 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a stub end for equipment piping and a method for manufacturing the same.

[0002]

2. Description of the Related Art In a conventionally known stub end, a flange 12 is provided at the base end of a thick short tube 11 by flaring (see FIG. 4). The outer surface of the flange 12 is cut off by cutting (see FIG. 5), so that the base edge of the inner peripheral surface 14 of the short tube portion 13 and the flange 1
After forming a semi-finished product 16 having a shape in which the inner peripheral edge of the outer surface 15 of the second 2 intersects at right angles, an auxiliary short with a groove 17 previously obtained at the tip of the short tube portion 13 of the semi-finished product 16 The finished product 19 (see FIG. 6) is obtained by connecting the pipes 18 by welding and subjecting the welded portions to finishing.

[0003]

In the stub end described in the above-mentioned prior art, the length of the stub end that can be cut to cut off the inner peripheral surface of the short tube portion 13 is limited by the function of the tool and the like. Because of the fatal cause of the failure, it was impossible to make a long short tube portion 13 at once, and the auxiliary short tube 18 with the groove 17 was separately prepared as described above. It had to be manufactured and connected by welding to obtain a finished product 19 having a long short pipe portion. This has caused the problem that the workability of manufacturing has been deteriorated and has been an obstacle to cost reduction.

The present invention provides a novel stub end obtained by conducting research and development for the purpose of solving the above problems, and a method for manufacturing the same.

[0005]

In order to achieve the above-mentioned object, a stub end according to the present invention comprises a flange portion 2 which is continuous with a base end of a short tube portion 1 and an inner peripheral surface 3 of the short tube portion 1. To the short tube portion 1 of the metal base material 5 such as stainless steel provided in a state where the base end edge and the inner peripheral edge of the outer surface 4 of the flange portion 2 intersect at right angles, with respect to the axis of the short tube portion 1 It is composed of an elongated portion 6 formed by extending the portion 1 by applying pressure in a direction perpendicular to the groove, and a groove 7 provided at a position near the tip of the elongated portion 6,

In the method of manufacturing a stub end according to the present invention, the flange 2 is connected to the base end of the short tube 1 and the base end of the inner peripheral surface 3 of the short tube 1 and the flange 2. A metal base material 5 such as stainless steel provided in a state where the inner peripheral edge of the outer side surface 4 intersects at a right angle is formed, and the short tube portion 1 of the base material 5 is formed with respect to the axis of the short tube portion 1. The section 1 is elongated by applying pressure in a direction perpendicular thereto, and then a groove 7 is provided at a position near the tip of the extension section 6 to complete the extension.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.
That is, first, the stainless steel is used to connect the flange 2 continuously to the base end of the short tube portion 1, and the base end edge of the inner peripheral surface 3 of the short tube portion 1 and the inner peripheral edge of the outer surface 4 of the flange portion 2 are formed. A base material 5 (see FIG. 1) provided in a state of exhibiting a shape intersecting at right angles is configured. Next, pressure is applied to the short tube portion 1 of the base material 5 in a direction perpendicular to the axis of the short tube portion 1 to extend the short tube portion 1 to a desired length (see FIG. 2). Thereafter, a roll groove 7 is provided at a position near the tip of the extension portion 6 extended by the above-mentioned pressure.
To obtain the finished product 8 (see FIG. 3).

The present invention uses a metal material such as stainless steel, titanium, titanium alloy or the like instead of stainless steel.

[0009]

According to the present invention, an auxiliary short pipe with a groove can be separately manufactured in advance and the step of connecting the short pipe to the short pipe by welding can be omitted. Deterioration of workability in manufacturing, obstacles to cost reduction, and the like can be resolved, and the present invention has a remarkable effect of completely achieving the intended purpose.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a base material.

FIG. 2 is a cross-sectional view showing a state immediately after elongation processing.

FIG. 3 is a sectional view showing a completed product of the present invention.

FIG. 4 is a sectional view showing a state immediately after the flare processing.

FIG. 5 is a sectional view showing a semi-finished product.

FIG. 6 is a sectional view showing a conventional completed product.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Short pipe part 2 Flange part 3 Inner peripheral surface 4 Outer side surface 5 Base material 6 Extension part 7 Groove 8 Finished product 11 Short tube 12 Flange part 13 Short tube part 14 Inner peripheral surface 15 Outer side surface 16 Semi-finished product 17 Groove 18 Auxiliary Short pipe 19 finished product

Claims (2)

[Claims] A flange (2) is connected to the proximal end of the short tube portion (1), and the proximal edge of the inner peripheral surface (3) of the short tube portion (1) and the inner peripheral edge of the outer surface (4) of the flange portion (2) intersect at right angles. Stretched by applying a pressure in a direction perpendicular to the axis of the short tube portion 1 to the short tube portion 1 of the metal base material 5 such as stainless steel provided in a state having a bent shape. A stub end including a portion 6 and a groove 7 provided at a position near the tip of the extension portion 6. 2. A flange 2 which is continuous with the base end of the short tube portion 1, and a base edge of an inner peripheral surface 3 of the short tube portion 1 and an inner peripheral edge of an outer surface 4 of the flange portion 2 intersect at a right angle. A metal base material 5 such as stainless steel provided in a state of exhibiting a bent shape is formed, and pressure is applied to the short tube portion 1 of the base material 5 in a direction perpendicular to the axis of the short tube portion 1 to thereby form the same portion. 1 is extended for a long time, and
A stub end manufacturing method characterized in that a groove 7 is provided at a position close to the front end of the stub end.