Method for making flexible pipe joint
A manufacturing method and technology of pipe joints, applied in the direction of pipes/pipe joints/pipe fittings, hose connection devices, applications, etc., can solve problems such as deformation of the head 5, and achieve the effects of improving productivity and shortening processing time
Active Publication Date: 2014-07-02
NAGOYA GIKEN IND
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Problems solved by technology
[0004] However, when the punch 3 is pressed into the protruding part 2, along with the forming of the joint part 4 and the opening of the shaft hole 6, the material (residue) pushed away by the punch 3 will deform the head 5.
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[0027] Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0028] Figure 9 The structure and usage method of the pipe joint for brake hoses manufactured by the manufacturing method of this invention as the pipe joint for hoses are shown. The pipe joint for brake hose includes: a cylindrical socket portion 42 as a hose connection portion; an annular head portion 37 as a component connection portion arranged perpendicular to the axis of the socket portion 42; The neck portion 32 connected to the socket portion 42 . The neck portion 32 is formed into a cylindrical shape (about 7±0.2 mm in outer diameter) thinner than the socket portion 42 . The joint part 12 is provided inside the socket part 42 . The hose main body 61 is inserted and fastened between the socket portion 42 and the joint portion 12 , thereby fixing the hose connection portion to the hose main body 61 . The bolt 71 is inserted into the hole 37a of the head port...
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Abstract
Provided is a method for manufacturing the tube joint for a soft tube, reducing the machining process, thus to limit the time for machining process. The invention, by taking an intermediate formed product composed of integrally formed projection, jack part, heat part, and neck part made of same material as the raw material, carries out cold plasticity treatment over the projection part to form a tube-like joint part. The shaft hole of the joint part is extended to the head part side. The excess material generated by the forming of the joint part and the extension of the shaft hole is utilized. The neck part is allowed to extensively deform along the direction where the head part is made to be away from the jack part, with the deformation to other directions being banned. To make the pre-formed intermediate formed product having the size necessary for the tube joint of the soft tube after deformation, the size of the pre-formed intermediate formed product is smaller than the necessary size for tube joint of the soft tube. The shaft hole is arranged at the neck part having size smaller than the external diameter of the jack. Therefore, the plasticity treatment can be utilized to open a shaft hole. As the excess material generated during the forming of the joint part and the arrangement of the shaft hole is utilized to the shifting of the head part, the objective is achieved.
Description
technical field [0001] The present invention relates to a method of manufacturing a pipe fitting for a hose having a socket portion on the outer periphery of a nipple portion. Background technique [0002] As a method of manufacturing pipe joints for hoses, such as Figure 10 As shown, a joint part forming protrusion 2 is integrally provided inside the socket part 1 as a hose connection part, and a punch 3 is pressed into the protrusion 2 to form a joint part 4 by plastic working. The punch 3 is pressed into the head 5 side to penetrate the shaft hole 6 (see Patent Document 1 below). When the joint part 4 is formed by pressing the punch 3 into the protruding part 2 in this way, the joint part 4 is extended until its length is the same as the length of the socket part 1 at the same time as the joint part 4 is formed, thereby completing the joint part 4 . [0003] Patent Document 1: Japanese Patent No. 3121549. [0004] However, when the punch 3 is pressed into the protrudi...
Claims
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IPC IPC(8): B21C37/28
CPCB21D51/16B21K1/16B23P15/00F16L33/20
Inventor 内海彻市冈政洋林健次山下胜
Owner NAGOYA GIKEN IND