JP2008075806A - Joint and manufacturing method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce costs by reducing cutting margins in cutting, in a joint with a hose connected to its one end and a connection apparatus tightened and fixed to its other end. <P>SOLUTION: This joint 10 is provided with, on its one end side, a hose connecting part 12 connecting the hose, in its center part, a hexagonal part 14, and on its other end side, a connection apparatus connecting part 16 tightening and fixing the connection apparatus. The hose connecting part 12, the hexagonal part 14, and the connection apparatus connecting part 16 are made of separate members. The hose connecting part 12 and connection apparatus connecting part 16 are manufactured by cutting round-bar-shaped steel members 50, 70 having different diameters, and the hexagonal part 14 is manufactured by cutting a hexagonal steel member 60. After that, a contact surface of the hose connecting part 12 with the hexagonal part 14 and a contact surface of the hexagonal part 14 with the connection apparatus connecting part 16 are respectively joined by friction welding. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a joint in which a hose is crimped and connected to one end, and a coupling device is connected to the other end, and a method for manufacturing the joint.

  Conventionally, a joint in which a hose is connected to one end and an adapter (connector) is attached to the other end is used as a joint for transferring a fluid such as water or oil.

  In such a joint, a portion for connecting a hose to one end of the metal fitting body and a connection portion for attaching a connecting tool to the other end of the metal fitting main body are integrally formed. The part to which the hose is connected is usually a caulking portion for caulking the hose.

Such a joint is generally formed by cutting a hexagonal steel material or a round bar steel material using an NC machine, etc., and forming a crimping portion for crimping a hose at one end and a connecting device of the other end at the other end. The connection part for attaching is formed (for example, refer to Patent Document 1).
JP 2006-118665 A

  As shown in FIG. 7, such a joint 100 is manufactured by cutting using a hexagonal steel material 102. In this joint 100, since the hexagonal part 100A for hanging the spanner protrudes in the radial direction from the caulking part 100B and the connecting part 100C on both sides, a large hexagonal steel material 102 is selected according to the outer shape of the hexagonal part 100A. The For this reason, the machining allowance 104 of the hexagonal steel material 102 at the caulking portion 100B and the connecting portion 100C becomes large, and it takes time for the cutting process, and the scraped material is wasted and the cost is increased.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a joint and a joint manufacturing method capable of reducing material waste and reducing costs.

  The invention according to claim 1 is provided between a hose connection portion to which a hose is connected, a connection device connection portion to which a connection device is fastened and fixed, and the hose connection portion and the connection device connection portion. A hexagonal portion that is larger in a radial direction than the hose connecting portion and the connecting device connecting portion and is pressed to prevent rotation when the hose is connected or the connecting device is tightened, and is configured as a separate part. A contact surface between the connecting portion and the hexagonal portion and a contact surface between the hexagonal portion and the connecting device connecting portion are joined by friction welding.

  According to the joint according to the first aspect of the present invention, the hose connection portion, the connecting device connection, and the radially large hexagonal portion provided between the hose connection portion and the connecting device connection portion are separate parts. It is configured. The contact surface between the hose connection portion and the hexagonal portion and the contact surface between the hexagonal portion and the coupling device connection portion are joined by friction welding. When the hose is connected to the hose connection part or the connection tool is fastened and fixed to the connection tool connection part, the hexagonal part is pressed with a spanner to prevent the joint from being rotated. In such a joint, the hose connection part, the hexagonal part, and the coupling instrument connection part are composed of separate parts, so each must be manufactured separately using round bars or hexagonal materials with different shapes and diameters. Is possible. For this reason, compared with the case where the whole joint is manufactured by cutting with one hexagonal steel material, the machining allowance is reduced, and the waste of material can be reduced.

  According to a second aspect of the present invention, in the joint according to the first aspect, the molten metal is applied to the peripheral surface of the hose connecting portion or the side wall of the hexagonal portion adjacent to the peripheral surface of the connecting device connecting portion at the time of the friction welding. It is characterized in that a groove portion capable of flowing in is formed.

  In the invention according to claim 2, since the groove portion is formed in the side wall of the hexagonal portion adjacent to the peripheral surface of the hose connection portion or the peripheral surface of the coupling device connection portion, the contact surface of the hose connection portion and the hexagonal portion, and When the connecting surface of the connecting device connecting portion and the hexagonal portion are joined by friction welding, molten metal flows into the groove portion, and the molten metal is suppressed from protruding into the peripheral surface of the hose connecting portion and the peripheral surface of the connecting device connecting portion. .

  The invention according to claim 3 is a method of manufacturing a joint in which a hose is connected to one end and a coupling device is fastened and fixed to the other end, and the hose connecting portion to which the hose is connected is a first round bar. Hose connecting part manufacturing process manufactured by cutting, a connecting instrument connecting part manufacturing process for manufacturing a connecting instrument connecting part to which the connecting instrument is fastened by cutting a second round bar, and the hose connection And a hexagonal part manufacturing step for manufacturing a hexagonal part that is larger in a radial direction than the connecting part and the connecting instrument connecting part and is pressed to prevent rotation when the hose is connected or the connecting instrument is tightened. A hose connection part joining step in which the hose connection part is brought into contact with one side of the hexagonal part and the contact surfaces are joined by friction welding, and the connecting device connection part and the other side of the hexagonal part are brought into contact with each other. Surface It is characterized by having a connection device connecting portion bonding step of bonding by pressing.

  In invention of Claim 3, a hose connection part is manufactured by the cutting process of a 1st round bar, and a connection instrument connection part is manufactured by the cutting process of a 2nd round bar. Furthermore, a hexagonal portion that is larger in the radial direction than the hose connecting portion and the connecting device connecting portion is manufactured by cutting hexagonal material. Thereafter, the hose connection portion and one side of the hexagonal portion are brought into contact to join the contact surfaces by friction welding, and the connecting device connection portion and the other side of the hexagonal portion are brought into contact to join the contact surfaces by friction welding. In such a joint manufacturing method, the hose connecting portion, the hexagonal portion, and the connecting device connecting portion are divided into the first round bar material, the second round bar material, and the hexagons larger in the radial direction than the diameters. It can be manufactured using materials. For this reason, compared with the case where the whole joint is manufactured by cutting with one steel material, the machining allowance is reduced, and the waste of material is reduced.

  The joint according to the present invention and the method for manufacturing the joint can cut the hose connection portion, the hexagonal portion, and the connecting device connection portion separately, and the entire joint is cut using a single hexagonal steel material. In comparison, the machining allowance is reduced, and the waste of material can be reduced. For this reason, cost reduction can be realized.

  Hereinafter, embodiments of the joint of the present invention will be described with reference to the drawings.

  FIG. 1 shows a half-sectional view of a joint 10 according to a first embodiment of the present invention. Further, FIG. 6 shows a half-cut cross-sectional view in a state where the hose 20 is connected to one end of the joint 10 and the adapter 30 as a connecting device is connected to the other end.

  The joint 10 includes a hose connection portion 12 provided at one end in the longitudinal direction, a hexagonal portion 14 provided at a position adjacent to the hose connection portion 12, and a position adjacent to the hexagonal portion 14. It is comprised with the connection tool connection part 16 provided in the other end of the direction.

  The hose connection part 12 is a tubular member for caulking and connecting the hose 20 (see FIG. 6), and a plurality of protrusions 13 that prevent the hose 20 from coming off are formed on the outer peripheral surface. A circular opening 18 </ b> A that allows fluid to flow in the longitudinal direction is formed at the center of the hose connection portion 12. The plurality of protrusions 13 include a tapered surface 13A that is inclined obliquely upward in the insertion direction of the hose 20 (left direction in the figure), and the upper corner portion of the tapered surface 13A is substantially perpendicular to the axial direction. Standing up to. Thereby, the hose connection part 12 becomes a shape which is easy to insert the hose 20 and is hard to remove.

  The hexagonal portion 14 is provided on the left side of the central portion of the joint 10 in FIG. 1, and protrudes in the radial direction from the peripheral surface of the hose connection portion 12 and the peripheral surface of the coupling device connection portion 16. The hexagonal portion 14 is formed in a hexagonal shape to prevent the joint 10 from being turned around with a spanner when the hose 20 (see FIG. 6) is connected or when the adapter 30 (see FIG. 6) is fastened and fixed. Is formed. A circular opening 18B through which fluid can flow is formed at the center of the hexagonal portion 14. The diameter of the opening 18B is substantially the same as the diameter of the opening 18A of the hose connection part 12.

  Further, on the side wall of the hexagonal portion 14, a groove portion 14 </ b> A is formed at a position adjacent to the peripheral surface of the hose connection portion 12, and a groove portion 14 </ b> B is formed at a position adjacent to the peripheral surface of the coupling device connection portion 16. As shown in FIG. 3, the groove portions 14 </ b> A and 14 </ b> B are formed in a substantially annular shape on the side wall of the hexagonal portion 14. In FIG. 3, only the groove portion 14B is shown, and the shape of the groove portion 14A is substantially the same, so that the description thereof is omitted.

  As shown in FIG. 1, the connecting device connecting portion 16 includes a sheet surface 16 </ b> A that is brought into contact with the end portion on the side opposite to the hexagonal portion 14 when the adapter 30 is connected. The sheet surface 16A is an inclined surface that expands from the front end portion toward the center portion. A circular opening 18 </ b> C through which a fluid can flow is formed at the center of the connecting device connecting portion 16. The diameter of the opening 18C is substantially the same as the diameter of the opening 18A of the hose connecting portion 12 and the opening 18B of the hexagonal portion 14. Further, a substantially planar enlarged diameter portion 16B is formed on the center side from the seat surface 16A of the connecting device connection portion 16, and a reduced diameter portion 16C is formed by providing a step at a position adjacent to the enlarged diameter portion 16B. Has been.

  Here, a method for manufacturing the joint 10 will be described.

  As shown in FIG. 2, the hose connection part 12 is manufactured by cutting the machining allowances 52 and 54 using the round bar steel material 50. As shown in FIG. Specifically, the protrusion 13 and the like on the outer peripheral surface are formed into a predetermined shape by cutting the cutting allowance 52, and the circular opening 18A is formed by cutting the cutting allowance 54. The size of the round steel bar 50 is selected according to the largest diameter portion 12A of the hose connection portion 12. On one side of the hose connecting portion 12, that is, on the left side wall in FIG. 2B, a flat contact surface 12B that is brought into contact with the hexagonal portion 14 is provided.

  As shown in FIG. 3, the hexagonal portion 14 is manufactured by cutting a machining allowance 62, 64, 66 using a hexagonal steel material 60. Specifically, the circular opening 18B is formed by cutting the cutting allowance 62. The groove 14A is formed by cutting the cutting allowance 64, and the groove 14B is formed by cutting the cutting allowance 66. The size of the hexagonal steel material 60 is selected according to the hexagonal outer shape of the hexagonal portion 14. A flat contact surface 14 </ b> C that is brought into contact with the hose connecting portion 12 is provided on one side of the hexagonal portion 14, that is, on the right side wall in FIG. On the other side of the hexagonal portion 14, that is, on the left side wall in FIG. 3B, a planar contact surface 14 </ b> D that is brought into contact with the connector connection portion 16 is provided.

  As shown in FIG. 4, the connecting tool connecting portion 16 is manufactured by cutting the machining allowances 72 and 74 using a round bar steel material 70. Specifically, the sheet surface 16A and the reduced diameter portion 16C on the outer peripheral surface are formed by cutting the cutting allowance 72, and the circular opening 18C is formed by cutting the cutting allowance 74. The magnitude | size of the round bar steel material 70 is selected according to the enlarged diameter part 16B with the largest diameter of the coupling instrument connection part 16. FIG. A flat contact surface 16D that is brought into contact with the hexagonal portion 14 is provided on one side of the connecting instrument connecting portion 16, that is, on the right side wall in FIG.

  Thereafter, as shown in FIG. 5, the hose connection part 12 is arranged on one end side, the hexagonal part 14 is arranged on the center part, and the connecting instrument connecting part 16 is arranged on the other end side. The connecting portion 16 is joined by friction welding to produce the joint 10 (see FIG. 1). Specifically, the contact surface 12B of the hose connection portion 12 and the contact surface 14C of the hexagonal portion 14 are abutted, and the metal is melted (softened) by friction welding to join the contact surface 12B and the contact surface 14C. Further, the contact surface 14D of the hexagonal portion 14 and the contact surface 16D of the connecting device connecting portion 16 are abutted, and the metal is melted (softened) by friction welding to join the contact surface 14D and the contact surface 16D. Thereby, the openings 18A, 18B, and 18C are communicated.

  At that time, as shown in FIG. 1, since the molten metal flows into the grooves 14 </ b> A and 14 </ b> B of the hexagonal portion 14, the molten metal protrudes from the peripheral surface of the hose connection portion 12 and the peripheral surface of the coupling device connection portion 16. Is suppressed). Further, when the molten metal protrudes into the openings 18A, 18B, 18C, it can be removed by a drill or the like after the friction welding.

  Here, the friction welding is a joining method that joins metals to each other using heat generated by friction. Specifically, two metal materials are put together and relatively rotated, and a thrust is applied to generate frictional heat on the contact surface. Method of joining two metal materials by softening the surface where two metal materials are abutted by the heat and the vicinity thereof, and when reaching the pressure temperature, the relative motion is stopped and the pressure thrust is further increased. It is.

  Next, the use state of the joint 10 will be described.

  As shown in FIG. 6, the hose 20 is inserted into the outer peripheral surface of the hose connection portion 12 of the joint 10, and the cylindrical fastener 22 is externally inserted so as to cover the outside of the hose 20. Then, the hose 20 is attached to the hose connection portion 12 by crimping the fastener 22 with a crimping machine (not shown). When the hose 20 is inserted into the hose connection part 12, a wrench is applied to the hexagon part 14 to hold down the hexagon part 14, thereby preventing the occurrence of twisting when the hose 20 is attached.

  A hook-shaped end portion 26 </ b> A of the cap nut 26 is connected to the reduced diameter portion 16 </ b> C of the connecting device connecting portion 16. A threaded portion 27 is formed on the inner peripheral surface of the other end portion of the cap nut 26.

  One end of the adapter 30 is provided with a tapered contact portion 30A whose diameter increases as the inner peripheral surface goes to the tip. The contact portion 30A is in contact with the seat surface 16A of the joint 10. . A screw portion 32 is provided at one end of the outer peripheral surface of the adapter 30, and a fixed hexagonal portion 30 </ b> B for hanging a spanner is provided near the center of the adapter 30. The other end of the adapter 30 is provided with a screw portion 33 for connection to other piping (not shown).

  The screw portion 32 of the adapter 30 is screwed into the screw portion 27 of the cap nut 26. At that time, the contact portion 30A and the seat surface 16A of the joint 10 are brought into contact with each other, and the hexagonal portion 14 is pressed with a spanner and the screw portion 27 of the cap nut 26 is screwed into the screw portion 32 of the adapter 30. An adapter 30 is attached to the other end of the joint 10. Further, another pipe (not shown) is connected to the screw portion 33 of the adapter 30. In this state, the fluid can flow through the openings 18A, 18B, 18C of the joint 10.

  In the joint 10 as described above, the hose connection portion 12, the hexagonal portion 14, and the coupling device connection portion 16 are configured as separate parts, and each uses a round bar steel material 50, a hexagonal steel material 60, and a round bar steel material 70 having different diameters and shapes. Manufactured. At that time, since the round bar steel material 50, the hexagonal steel material 60, and the round bar steel material 70 are selected according to the largest outermost part of the hose connection portion 12, the hexagonal portion 14, and the coupling device connection portion 16, the machining allowance is minimized. It ’s all you need. For this reason, compared with the case where the whole joint is manufactured by cutting with a single steel material (see FIG. 7), the machining allowance is reduced and the waste of material is reduced. Thereby, cost reduction can be realized.

  In addition, the diameter and magnitude | size of the hose connection part 12, the hexagon part 14, and the coupling instrument connection part 16 are not limited to the structure of the said embodiment, A hose connection part and a hexagon part and a coupling instrument connection part from which a dimension differs are included. It is also possible to use it. For this reason, compared with the integral joint 100 (see FIG. 7), it becomes easier to deal with various variations, and the product lineup is abundant. Moreover, since a joint can be manufactured with the combination of a hose connection part, a hexagonal part, and a coupling instrument connection part which are separate parts, it can manage inventories little.

  In addition, in the said embodiment, although the hose connection part 12, the hexagonal part 14, and the coupling instrument connection part 16 were manufactured using the round bar steel material 50, the hexagonal steel material 60, and the round bar steel material 70, not only this but other It can be manufactured using a metal material.

  In the above embodiment, the adapter 30 is fastened and fixed to the connecting device connecting portion 16 of the joint 10 using the cap nut 26. However, the present invention is not limited to this configuration, and a connecting device such as an adapter is directly connected to the connecting device connecting portion. It may be configured to be fastened and fixed.

It is a half cut sectional view showing the joint concerning a 1st embodiment of the present invention. It is a figure explaining the process of manufacturing the hose connection part of the joint shown in Drawing 1, and (A) is a top view and (B) is a half cut sectional view. It is a figure explaining the process of manufacturing the hexagonal part of the joint shown in Drawing 1, and (A) is a top view and (B) is a half cut sectional view. It is a figure explaining the process of manufacturing the coupling instrument connection part of the joint shown in FIG. 1, Comprising: (A) is a top view, (B) is a half-cut sectional view. It is a figure explaining the process of joining a hose connection part, a hexagonal part, and a connecting instrument connection part. It is a half-cut sectional view which shows the state which connected the hose to the end of the coupling shown in FIG. 1, and connected the adapter to the other end. It is a figure explaining the problem in the cutting process of the conventional joint, Comprising: (A) is a top view, (B) is a half-cut sectional view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Joint 12 Hose connection part 12B Contact surface 13 Protrusion part 14 Hexagon part 14A Groove part 14B Groove part 14C Contact surface 14D Contact surface 16 Connecting instrument connection part 16A Sheet surface 16B Expanded diameter part 16C Reduced diameter part 16D Contact surface 18A Opening part 18B Opening part 18C Opening 20 Hose 26 Cap nut 27 Screw 30 Adapter (connector)
32 Threaded portion 50 Round bar steel 52 Cutting allowance 54 Cutting allowance 60 Hexagonal steel 62 Cutting allowance 64 Cutting allowance 66 Cutting allowance 70 Round bar steel 72 Cutting allowance 74 Cutting allowance

Claims (3)

A metal hose connection to which the hose is connected;
A metal connector connecting part to which the connector is tightened and fixed;
Provided between the hose connection part and the coupling instrument connection part, and larger in the radial direction than the hose connection part and the coupling instrument connection part, and prevent rotation when connecting the hose or tightening the coupling instrument The metal hexagonal part that is pressed to do is composed of separate parts,
The joint characterized by the contact surface of the said hose connection part and the said hexagonal part, and the contact surface of the said hexagonal part and the said coupling instrument connection part being joined by friction welding.   The groove part in which molten metal can flow in at the time of the friction welding is formed in the side wall of the hexagonal part adjacent to the peripheral surface of the hose connection part or the peripheral surface of the connecting instrument connection part. The joint according to 1. A method of manufacturing a joint in which a hose is connected to one end and a coupling device is fastened and fixed to the other end,
A hose connection part manufacturing process for manufacturing a hose connection part to which the hose is connected by cutting the first round bar; and
A connecting device connecting portion manufacturing step for manufacturing a connecting device connecting portion to which the connecting device is fastened and fixed by cutting the second round bar; and
The hexagonal part that is larger in the radial direction than the hose connection part and the coupling instrument connection part and that is pressed to prevent rotation when the hose is connected or the coupling instrument is tightened is manufactured by cutting the core part of the hexagonal material Hexagonal part manufacturing process to
A hose connection part joining step in which the hose connection part and one side of the hexagonal part are brought into contact and the contact surface is joined by friction welding,
A connecting device connecting portion joining step of bringing the connecting device connecting portion into contact with the other side of the hexagonal portion and joining the contact surfaces by friction welding;
A method for manufacturing a joint, comprising:

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