JP6505193B2 - Method of manufacturing valve device - Google Patents

Description

  The present invention relates to a method of manufacturing a valve device provided with a valve housing and a pipe member joined thereto.

  Conventionally, as a valve device, for example, there is a solenoid valve disclosed in Patent Document 1. As shown in FIG. 7, the solenoid valve 801 disclosed in Patent Document 1 includes a cylindrical plunger tube 810 made of metal and a fluid inlet joint 881 made of metal. The plunger tube 810 forms a valve chamber 811, and a fluid inlet joint 881 is brazed to the peripheral wall portion 812 thereof.

  In the above-described solenoid valve 801, as a method of brazing the plunger tube 810 and the fluid inlet joint 881, for example, when furnace brazing is used, the temperature of the entire member to be brazed becomes high because time is required for temperature rise. The heating may cause the plunger tube 810 and the fluid inlet fitting 881 to become blunt. As a result, the plunger tube 810 and the fluid inlet joint 881 become easily deformed during handling, and this deformation can not connect with the opposite pipe, and the plunger tube 810 and the plunger 820 housed in this, the valve body 830 and The dimensional change of the valve seat member 840 or the like may occur. In particular, when the dimensional change of the valve seat member 840 occurs, the sealing performance between the valve seat member 840 and the valve body 830 may be reduced.

  Therefore, in order to avoid such a problem, welding is used instead of brazing to join the plunger tube 810 and the fluid inlet joint 881 so that only the joint and its vicinity are heated. It is conceivable to avoid such as dullness or dimensional change. And by using laser welding as a welding method, since one point is concentrated and heated by a laser beam, blunting of each member, dimensional change, etc. can be avoided effectively.

JP, 2011-236937, A

  However, in laser welding it is necessary to focus on the welding point, but in the above-mentioned solenoid valve 801, since the plunger tube 810 is cylindrical, as shown in FIGS. 8 (a) and 8 (b), The peripheral edge of the communication hole 814 provided to open at the peripheral wall portion 812 of 810 is three-dimensionally curved not in one plane. Therefore, as shown in FIGS. 9A and 9B, the peripheral edge S of the joint between the plunger tube 810 and the fluid inlet joint 881 is also curved in three dimensions rather than in one plane, as shown in FIGS. In order to focus the light, it is necessary to move the laser in a three-dimensional direction, and the bonding using laser welding has a problem that the number of manufacturing steps increases and the cost increases.

  Then, this invention makes it a subject to provide the manufacturing method of the valve apparatus of the structure which can join a piping member more easily to the peripheral wall part of a cylindrical valve housing using laser welding.

According to a first aspect of the present invention, in order to solve the above problems, a cylindrical valve housing made of metal and a metal different from the valve housing are formed and joined to a peripheral wall portion of the valve housing. In a method of manufacturing a valve device including one or more piping members, a peripheral wall portion of the valve housing communicates a cylindrical curved surface portion with the inside and the outside of the valve housing and the one or more pipings at least one planar portion one or more communication holes one end of the member is fitted is formed, as well as have a, be those the planar portion is formed in a concave shape with respect to the curved surface portion And fitting one end portion of the one or more piping members into the corresponding one or more communication holes, and mixing the one or more piping members between the communication hole and the piping member by welding In a state of sandwiching the tubing made of a fit metal, it is a manufacturing method of the valve device, characterized in that joining by laser welding to the flat portion on the inside than the curved surface portion.

According to the first aspect of the present invention, the peripheral wall portion of the valve housing communicates the inside and the outside of the valve housing, and one or more communication holes in which one end of one or more piping members is fitted It has at least one planar part formed. Then, one or more piping members are joined to the plane portion by laser welding in a state in which one end portion is fitted in one or more corresponding communication holes. Since it was made in this way, since the communicating hole with which the end part of piping member is fitted is provided in a plane part, the circumference of a communicating hole will be included in one plane. Therefore, when one end of the piping member is fitted in the communication hole, the peripheral edge of the junction where the outer peripheral surface of the piping member and the inner peripheral surface of the communication hole are in contact is also included in one plane. There is no need to move the laser in three dimensions to focus the light, and it is sufficient to move the laser in two dimensions along the plane after focusing the laser light. Thus, the pipe member can be more easily joined to the peripheral wall portion of the cylindrical valve housing by using laser welding.

It is a longitudinal cross-sectional view of the solenoid valve of one Embodiment of this invention. (A) is a perspective view which shows a part of plunger tube with which the solenoid valve of FIG. 1 is equipped, (b) is sectional drawing in alignment with XX of (a). (A) is a perspective view which shows the state in which the 1st coupling was fitted by the plunger tube of Fig.2 (a), (b) is sectional drawing in alignment with XX of (a). (A) is a fragmentary sectional view which shows the state before welding of the plunger tube and valve seat member which the electromagnetic valve of FIG. 1 has, a 1st joint, and a 2nd joint, (b) shows the state after welding FIG. (A) is a fragmentary perspective view which shows the structure of the 1st modification of the solenoid valve of FIG. 1 (The structure in which the several communicating hole was formed in one plane part), (b) is FIG. It is a fragmentary perspective view showing the composition of the 2nd modification of a solenoid valve (the composition by which one communicating hole was formed in each of a plurality of plane parts). (A) is a fragmentary perspective view which shows the structure of the reference example of the solenoid valve of FIG. 1 (The structure in which one communicating hole was formed in one plane part), (b) is a solenoid valve of FIG. It is a fragmentary perspective view showing composition of a reference example (composition in which a plurality of communicating holes were formed in one plane part), and (c) is a fragmentary perspective view showing composition of the 5th modification of a solenoid valve of FIG. It is a figure (The structure by which one communicating hole was formed in each of a several plane part). It is a longitudinal cross-sectional view of the conventional solenoid valve. (A) is a perspective view which shows a part of plunger tube with which the solenoid valve of FIG. 7 is equipped, (b) is sectional drawing in alignment with XX of (a). (A) is a perspective view which shows the state in which the 1st coupling was fitted by the plunger tube of Fig.8 (a), (b) is sectional drawing in alignment with XX of (a).

  Hereinafter, a solenoid valve according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

  FIG. 1 is a longitudinal sectional view of a solenoid valve according to an embodiment of the present invention. Fig.2 (a) is a perspective view of a part of plunger tube with which the solenoid valve of FIG. 1 is equipped, (b) is sectional drawing in alignment with XX of (a). Fig.3 (a) is a perspective view which shows the state in which the 1st coupling was fitted by the plunger tube of Fig.2 (a), (b) is sectional drawing in alignment with XX of (a). is there. 4 (a) is a partial cross-sectional view showing a state before welding of a plunger tube and a valve seat member, and a first joint and a second joint provided in the solenoid valve of FIG. 1, and FIG. 4 (b) is a state after welding It is a fragmentary sectional view showing. The concept of “upper and lower” in the following description corresponds to the upper and lower sides in FIG. 1, and indicates the relative positional relationship between the members, not the absolute positional relationship.

  As shown in FIG. 1, the solenoid valve 1 of the present embodiment includes a plunger tube 10, a plunger 20, a valve body 30, a valve seat member 40, a suction element 50, a coil spring 60, and an electromagnetic coil 70. , A first joint 81, a second joint 82, a first welding portion 91, and a second welding portion 92.

  The plunger tube 10 is formed in a cylindrical shape, for example, using a nonmagnetic metal such as austenitic stainless steel as a material. The plunger tube 10 forms a valve chamber 11 inside thereof. As shown in FIGS. 2A and 2B, the peripheral wall portion 12 of the plunger tube 10 is provided with one flat surface portion 13 of which a portion is formed in a flat shape. A communication hole 14 communicating the inside and the outside of the plunger tube 10 is provided at a central portion of the flat portion 13. The communication hole 14 is burred so as to protrude toward the inside of the plunger tube 10. The plunger tube 10 corresponds to an example of a valve housing.

  The communication hole 14 of the plunger tube 10 is provided in the flat portion 13. That is, the peripheral edge of the communication hole 14 is included in one plane. Therefore, as shown in FIGS. 3 (a) and 3 (b), when one end of a first joint 81 described later is fitted in the communication hole 14 provided in the flat portion 13 of the plunger tube 10 The peripheral edge S of the portion is also included in one plane. In FIG. 3B, for convenience of description, a tube material 95 described later sandwiched between the inner peripheral surface of the communication hole 14 and the outer peripheral surface of the plunger tube 10 is omitted.

  The plunger 20 is formed in a cylindrical shape, for example, using a metal of a magnetic body such as iron as a material. The plunger 20 is slidably disposed in the plunger tube 10 in the direction of the axis L (vertical direction in the drawing).

  A valve body holding portion 21 is formed at the lower end portion of the plunger 20. The valve body holding portion 21 has a substantially cylindrical shape, and the claw portion 21a at the lower end thereof is bent inward. A valve body 30, which will be described later, is accommodated in the valve body holding portion 21 so as to be slightly movable in the direction of the axis L, and the claw portion 21a prevents the downward removal. Further, at the upper end portion of the plunger 20, there is provided a coil spring accommodating portion 22 formed by hollowing out the plunger 20 in the direction of the axis L to accommodate a coil spring 60 described later. The plunger 20 has a planar D-cut surface 23 formed on a part of the outer peripheral surface thereof. The D-cut surface 23 is formed by cutting a plane parallel to the direction of the axis L as a cross section.

  The valve body 30 is formed in a spherical shape, for example, using a metal as a material. The valve body 30 is held by the valve body holding portion 21 of the plunger 20, and moves in the direction of the axis L with the movement of the plunger 20.

  The valve seat member 40 is made of, for example, a metal such as austenitic stainless steel. The valve seat member 40 includes a cylindrical small diameter portion 41, a cylindrical large diameter portion 42 connected to the lower end of the small diameter portion 41, and a flange portion 43 formed to project outward from the lower end of the large diameter portion. Is provided integrally. A valve port 44 is formed at the upper end of the small diameter portion 41. The valve seat member 40 is disposed within the plunger tube 10 with its axis superimposed on the axis L so that the valve port member 44 is positioned within the plunger 20 and the valve port 44 faces the valve body 30 held by the plunger 20. . Further, the valve seat member 40 is joined by welding in which the peripheral edge of the flange portion 43 is fitted to the lower end portion of the inner peripheral surface of the plunger tube 10.

  The suction element 50 is formed in a cylindrical shape, for example, using a metal of a magnetic substance such as iron as a material. The suction piece 50 is partially inserted into the upper end of the plunger tube 10 and attached by laser welding the peripheral edge of the upper end and the portion of the outer circumferential surface of the suction member 50 in contact with the peripheral edge. .

  The lower end of the coil spring 60 abuts against the bottom of the coil spring accommodating portion 22 formed in the plunger 20, and the upper end in the figure abuts against the lower surface of the suction element 50 to be in a compressed state. It is arranged by. The coil spring 60 presses the plunger 20 downward in the drawing so that the valve port 44 is blocked by the valve body 30 when the plunger 20 is not sucked by the suction element 50.

  The electromagnetic coil 70 has a coil body 71 configured by sealing a cylindrical bobbin around which a conducting wire is wound with a resin, and an outer case 72 that accommodates the coil body 71. The electromagnetic coil 70 is disposed so that a part of the plunger tube 10 and the suction element 50 are accommodated inside the coil body 71, and the outer case 72 is screwed to the suction element 50 by a screw N. When energized, the electromagnetic coil 70 generates a magnetic force to magnetize the suction element 50, whereby the plunger 20 is attracted by the magnetic force of the suction element 50 and moved upward in the drawing.

  The first joint 81 is formed in a tubular shape, for example, using a metal such as copper as a material. One end of the first joint 81 is fitted in the communication hole 14 of the plunger tube 10 and is joined by welding. Between the first joint 81 and the flat portion 13 of the peripheral wall portion 12 of the plunger tube 10, a first welded portion 91 for joining them is provided. The first joint 81 corresponds to an example of a piping member.

  The second joint 82 is formed in a tubular shape, for example, using a metal such as copper as a material. One end portion of the second joint 82 is fitted inside the large diameter portion 42 of the valve seat member 40 and is joined by welding. Between the second joint 82 and the large diameter portion 42 of the valve seat member 40, a second welded portion 92 for joining them is provided.

  The first welded portion 91 is formed of stainless steel constituting the plunger tube 10, copper constituting the first joint 81, and nickel (Ni) between the flat portion 13 of the plunger tube 10 and the first joint 81. Each is a portion which is melted and mixed by laser welding and then solidified. The plunger tube 10 and the first joint 81 are joined to each other via the first welding portion 91.

  The second welded portion 92 is made of stainless steel constituting the large diameter portion 42 of the valve seat member 40 and copper constituting the second joint 82 between the large diameter portion 42 of the valve seat member 40 and the second joint 82. And nickel (Ni) are each melted and mixed by laser welding and then solidified. The valve seat member 40 and the second joint 82 are joined to each other through the second welded portion 92.

  With the above configuration, in the non-energized state in which the electromagnetic coil 70 is not energized, the electromagnetic coil 70 does not generate a magnetic force, so that the attraction element 50 is not magnetized. The pressure brings the plunger 20 away from the suction element 50. At this time, the valve body 30 is seated on the valve seat member 40 to be in a valve closed state.

  Then, in the energized state in which the electromagnetic coil 70 is energized, since the magnetic coil 70 generates a magnetic force, the suction element 50 is magnetized, and the magnetic force emitted by the suction element 50 against the pressing force of the coil spring 60 The plunger 20 is in a position in contact with the suction element 50. At this time, the valve body 30 is separated from the valve seat member 40 to be in the valve open state.

  Next, an example of the manufacturing method of the solenoid valve 1 mentioned above is demonstrated with reference to FIG. 4 (a), (b).

(1: Welding process)
The valve seat member 40 is previously joined to the plunger tube 10 by welding. Then, as shown in FIG. 4A, one end portion of the first joint 81 is inserted into and engaged with the communication hole 14 of the plunger tube 10, and the inner peripheral surface of the communication hole 14 of the plunger tube 10 and the first joint A tube material 95 made of nickel (Ni) and having a thickness of about 0.1 mm to 0.5 mm is press-fit into the space with the outer peripheral surface of the steel plate 81. Alternatively, after fitting the tube material 95 into the communication hole 14 of the plunger tube 10 first, one end of the first joint 81 may be press-fit into the inside of the tube material 95 for fitting. That is, the first joint 81 is fitted in the communication hole 14 of the plunger tube 10, and the tube material 95 is sandwiched between the plunger tube 10 and the first joint 81.

  Next, the inner peripheral surface portion of the communication hole 14 (that is, the peripheral wall portion of the plunger tube 10), the tube material 95, and the first joint 81 over the entire circumference along the circumferential direction of the communication hole 14 from the outside of the plunger tube 10. The irradiation is stopped after the laser L is irradiated so that the outer peripheral surface portion of the glass melts simultaneously. Thereby, as shown in FIG. 4B, the stainless steel forming the inner peripheral surface portion of the communication hole 14 of the plunger tube 10, the nickel forming the tube material 95, and the copper forming the first joint 81 respectively melt The mixture is mixed and solidified to form a first welded portion 91 over the entire circumference of the communication hole 14 between the plunger tube 10 and the first joint 81. The plunger tube 10 and the first joint 81 are joined to each other by the first welding portion 91.

  Further, as shown in FIG. 4A, one end portion of the second joint 82 is inserted into and fitted to the large diameter portion 42 of the valve seat member 40, and the inner peripheral surface of the large diameter portion 42 of the valve seat member 40 Between the second joint 82 and the outer peripheral surface of the second joint 82, a nickel (Ni) tube material 96 having a thickness of about 0.1 mm to 0.5 mm is press-fit. Alternatively, after fitting the tube material 96 to the large diameter portion 42 of the valve seat member 40 first, the second joint 82 may be press-fit and fit inside the tube material 96. That is, the second joint 82 is fitted to the large diameter portion 42 of the valve seat member 40, and the tube material 96 is sandwiched between the large diameter portion 42 of the valve seat member 40 and the second joint 82.

  Next, from the outside of the valve seat member 40 to the entire circumference along the circumferential direction of the inner circumferential surface of the large diameter portion 42, the inner circumferential surface portion of the large diameter portion 42 (that is, the valve seat member 40) And, after irradiating the laser L so that the outer peripheral surface portion of the second joint 82 is melted simultaneously, the irradiation is stopped. Thereby, as shown in FIG. 4B, the stainless steel forming the large diameter portion 42 of the valve seat member 40, the nickel forming the tube material 96, and the copper forming the second joint 82 are respectively melted and mixed. After being fitted and solidified, a second welded portion 92 is formed between the valve seat member 40 and the second joint 82 all around the inner peripheral surface of the large diameter portion 42. The valve seat member 40 and the second joint 82 are joined to each other by the second welded portion 92.

(2: assembly process)
Next, after the plunger 20 holding the valve body 30 is inserted into the plunger tube 10, a part of the coil spring 60 is accommodated in the coil spring accommodating portion 22 of the plunger 20. Then, a part of the suction piece 50 is inserted into the upper end of the plunger tube 10, and the periphery of the upper end of the plunger tube 10 and the portion of the outer peripheral surface of the suction piece 50 in contact with the periphery are joined by laser welding . Then, the plunger tube 10 and the suction element 50 fixed to each other are inserted inside the coil body 71 of the electromagnetic coil 70, and the outer case 72 of the electromagnetic coil 70 is screwed to the suction element 50 by a screw N. Attach. The electromagnetic valve 1 is completed through the welding process and the assembling process sequentially.

  From the above, according to the solenoid valve 1 of the present embodiment, the communication hole 14 is formed in which the peripheral wall portion 12 of the plunger tube 10 communicates the inside and the outside of the plunger tube 10 and the one end portion of the first joint 81 is fitted. And one flat portion 13. And the 1st joint 81 is joined to the plane part 13 by laser welding in the state where the end part was fitted by the corresponding communicating hole 14. Since it was made in this way, since the communicating hole 14 with which the end part of the 1st coupling 81 is fitted is provided in the plane part 13, the periphery of the communicating hole 14 will be included in one plane. Therefore, when one end of the first joint 81 is fitted in the communication hole 14, the peripheral edge S of the junction where the outer peripheral surface of the first joint and the inner peripheral surface of the communication hole 14 contact is also included in one plane. Therefore, in welding, it is not necessary to move the laser in three dimensions in order to focus the laser light, and it is sufficient to move the laser in two dimensions along the one plane after focusing the laser light once. . Thus, the first joint 81 can be more easily joined to the peripheral wall portion 12 of the cylindrical plunger tube 10 by using laser welding.

  Further, in the solenoid valve 1, stainless steel, copper, and nickel mixed with these by welding between the plunger tube 10 and the first joint 81 and between the valve seat member 40 and the second joint 82. A first welded portion 91 and a second welded portion 92 are respectively provided by melting and solidifying by laser welding, and the plunger tube 10 and the first joint 81 are joined to each other via the first welded portion 91, and the valve The seat member 40 and the second joint 82 are joined to each other via the second welding portion 92. From this, stainless steel and copper are mixed with each other by interposing stainless steel and copper and nickel mixed by welding, as compared with a configuration in which stainless steel and copper are directly welded, and therefore, stainless steel and copper are mixed. It is possible to suppress clumping in a separated state without fitting. Therefore, welding defects, such as an internal crack which generate | occur | produces by stainless steel and copper not mixing, can be suppressed. As a result, the welding joint between the stainless steel plunger tube 10 and the valve seat member 40 and the copper first joint 81 and the second joint 82 by the first welding portion 91 and the second welding portion 92 formed by laser welding. Bond strength can be effectively secured.

  As mentioned above, although this invention was mentioned and described a preferable embodiment, the valve apparatus of this invention is not limited to the structure of these embodiment.

  For example, in the embodiment described above, one plane portion 13 is provided on the peripheral wall portion 12 of the cylindrical plunger tube 10, and one communication hole 14 is formed on the plane portion 13. It is not limited to Here, the structure of the modification of the solenoid valve of embodiment mentioned above is shown to FIG. 5 (a), (b). FIG. 5 (a) is a perspective view showing a configuration of a first modification of the solenoid valve of FIG. 1 (a configuration in which a plurality of communication holes are formed in one plane portion), FIG. FIG. 18 is a perspective view showing a configuration of a second modified example of the solenoid valve (a configuration in which one communication hole is formed in each of a plurality of planar portions).

  For example, as shown in FIG. 5A, one flat surface portion 13A is provided on the peripheral wall portion 12A of the plunger tube 10A, and a plurality of communication holes 14A and 14B are formed in the flat surface portion 13A. The joints 81A and 81B may be fitted to 14A and 14B, respectively, and the solenoid valve 2 may be configured to be joined by laser welding. That is, one flat surface portion 13A is formed with a plurality of communication holes 14A, 14B in which the peripheral wall portion 12A of the plunger tube 10A communicates the inside and the outside of the plunger tube 10A and the one end portions of the plurality of joints 81A, 81B are fitted. have. And a plurality of joints 81A and 81B are joined to plane part 13A by laser welding in the state where one end part was fitted by a plurality of corresponding communicating holes 14A and 14B, respectively. Such a configuration may be used.

  Alternatively, for example, as shown in FIG. 5B, a plurality of flat portions 13C and 13D are provided in the peripheral wall portion 12C of the plunger tube 10C, and communication holes 14C and 14D are formed in each of them. The joints 81C and 81D may be fitted to the respective joints 14D and 14D, and the electromagnetic valve 3 may be configured to be joined by laser welding. That is, a plurality of communication holes 14C and 14D are formed by dividing the peripheral wall 12C of the plunger tube 10C into the inside and outside of the plunger tube 10C and fitting one end of the plurality of joints 81C and 81D. It has plane portions 13C and 13D. And a plurality of joints 81C and 81D are joined by laser welding to a plurality of plane parts 13C and 13D in the state where one end part was fitted to a plurality of corresponding communicating holes 14C and 14D respectively. Such a configuration may be used.

  Even with the configuration as shown in FIGS. 5A and 5B, the same effect as that of the above-described embodiment can be obtained. That is, since the communication hole in which the one end portion of the joint is fitted is provided in the flat portion, the peripheral edge of the communication hole is included in one plane. Therefore, when one end of the joint is fitted in the communication hole, the peripheral edge of the junction where the outer peripheral surface of the joint and the inner peripheral surface of the communication hole are in contact is also included in one plane. It is not necessary to move the laser in three dimensions for focusing, but it is sufficient to move the laser in two dimensions along the one plane after focusing the laser light once. Thereby, the joint can be more easily joined to the peripheral wall portion of the cylindrical plunger tube by using laser welding.

  Alternatively, for example, as shown in FIG. 6A, the plunger tube 10E includes a peripheral wall portion 12E formed in a rectangular tube shape, and a ridgeline R extending in the axial direction (vertical direction in the drawing) in the peripheral wall portion 12E. The electromagnetic valve 4 has a configuration in which the flat portion 13E is provided to divide (divide) in the axial direction, and the joint 81E is fitted in the communication hole 14E formed in the flat portion 13E and joined by laser welding. Is considered as a reference example. That is, one flat portion 13E is formed with one communication hole 14E in which the peripheral wall portion of the angular tube shaped plunger tube 10E communicates with the inside and outside of the plunger tube 10E and the one end portion of one joint 81E is fitted. have. The flat portion 13E is disposed to align in the extending direction of the ridge line R with respect to the ridge line R in the peripheral wall portion 12E of the plunger tube 10E, and the joint 81E has one end fitted in the corresponding communication hole 14E. It is joined to the plane part 13E by laser welding in the state.

  Alternatively, for example, as shown in FIG. 6B, the plunger tube 10F includes a peripheral wall portion 12F formed in a rectangular cylindrical shape, and a ridgeline R extending in the axial direction (vertical direction in the drawing) in the peripheral wall portion 12F. The solenoid valve 5 has a flat portion 13F so as to be aligned in the axial direction, and the joints 81F and 81G are fitted to the communication holes 14F and 14G formed in the flat portion 13F and joined by laser welding. Is considered as a reference example. That is, one flat surface portion 13F is formed with a plurality of communication holes 14F, 14G in which the peripheral wall portion 12F of the plunger tube 10F communicates the inside and the outside of the plunger tube 10F and the one end portions of the plurality of joints 81F, 81G are fitted. have. The flat portions 13F are arranged in the extending direction of the ridge line R with respect to the ridge line R in the peripheral wall portion 12F of the plunger tube 10F, and the plurality of joints 81F and 81G correspond to a plurality of communication holes 14F corresponding to each. It is joined to the plane part 13F by laser welding in a state where one end is fitted to 14G.

  Alternatively, for example, as illustrated in FIG. 6C, the plunger tube 10H includes a peripheral wall portion 12H formed in a rectangular tube shape, and a ridgeline R extending in the axial direction (vertical direction in the drawing) in the peripheral wall portion 12H. The flat portions 13H and 13J are provided so as to divide (divide) in the axial direction, and the joints 81H and 81J are fitted in the communication holes 14H and 14J formed in the flat portions 13H and 13J and joined by laser welding. A solenoid valve 6 having the above configuration is considered as a reference example. That is, a plurality of communication holes 14H and 14J are formed by dividing the peripheral wall portion 12H of the plunger tube 10H into the inside and outside of the plunger tube 10H and fitting one end of the plurality of joints 81H and 81J. It has flat portions 13H and 13J. A plurality of flat portions 13H and 13J are arranged in the extending direction of the ridgeline R with respect to the ridgeline R in the peripheral wall portion 12H of the plunger tube 10H, and a plurality of joints 81H and 81J respectively correspond to a plurality of communication It is joined by laser welding to a plurality of plane parts 13H and 13J in the state where one end part was fitted by hole 14H and 14J.

  Even with the configuration as shown in FIGS. 6A to 6C, the same effect as that of the above-described embodiment can be obtained. That is, a flat portion made flat by eliminating the ridge line is disposed at a portion where the ridge line in the peripheral wall portion of the plunger tube is extended, and a communication hole in which one end portion of the joint is fitted to the flat portion. Is provided, the periphery of the communication hole is included in one plane. Therefore, when one end of the joint is fitted in the communication hole, the peripheral edge of the junction where the outer peripheral surface of the joint and the inner peripheral surface of the communication hole are in contact is also included in one plane. It is not necessary to move the laser in three dimensions for focusing, but it is sufficient to move the laser in two dimensions along the one plane after focusing the laser light once. As a result, the joint can be more easily joined to the peripheral wall portion of the rectangular cylindrical plunger tube by using laser welding.

  Moreover, in the embodiment mentioned above, although the tube material consisting of nickel was used for welding of each joint, it is not limited to this. For example, in the case where the plunger tube, the valve seat member, and each joint are made of the same kind of metal as a material, for example, in the case of a combination of metals in which welding defects hardly occur, the above-mentioned tube material is not used. Alternatively, the plunger tube and the valve seat member may be joined directly to each joint by laser welding.

  Further, in the above-described embodiment, as the tube material which is a metal material sandwiched between the plunger tube and the valve seat member and each joint, a material made of nickel is used, but the invention is limited thereto. is not. As a material which comprises such a metal material, it is good if it is a metal which mixes with stainless steel and copper by welding, and the kind of metal used as the material is arbitrary. As the material constituting the metal material, it is preferable to use one metal selected from among nickel, lithium, bismuth, gold and platinum as the main component (containing more than 50% by weight), and these metals are preferable. By using it, the weldability can be enhanced and welding defects can be suppressed. Alternatively, phosphorus copper solder, silver solder or nickel solder may be used as a material constituting the metal material. Phosphorus copper solder (JIS Z3264) is a brazing material obtained by adding about 5% to 8% of phosphorus to copper. Silver braze (JIS Z 3261) is a braze material containing silver, copper and zinc in a high proportion, and cadmium, tin, nickel and the like may be added depending on the use. Nickel brazing (JIS Z3265) is a brazing material containing nickel as a main component, to which chromium, boron, silicon and the like are added.

  Moreover, in embodiment mentioned above, although the 1st coupling, the 2nd coupling, etc. were comprised using pure copper as a material, it is not limited to this. The material of such a piping member may be copper or a copper alloy containing copper as a main component (more than 50% by weight). The material of the piping member is preferably one copper (including a copper alloy) selected from among pure copper, oxygen-free copper, tough pitch copper, phosphorus-deoxidized copper and aluminum bronze.

  In each of the above-described embodiments, the nickel plated layer or the nickel-based member is melt-adhered to the portion of the outer peripheral surface of the first joint, the second joint, etc., joined by welding to the plunger tube or valve seat member. An adhesion part may be provided. By so doing, the weldability between the valve housing and the valve seat member and each joint can be further enhanced.

  The above-described embodiment only shows a typical form of the present invention, and the present invention is not limited to the embodiment. Although the solenoid valve described above has been shown as an example of an embodiment of the present invention, the present invention also applies to various other types of valve devices, such as throttle valve devices, flow path switching valves, check valves, pressure regulating valves, etc. Applicable That is, those skilled in the art can carry out various modifications without departing from the gist of the present invention in accordance with conventionally known findings. Of course, as long as the configuration of the valve device of the present invention is provided even after such a modification, it is included in the scope of the present invention.

1 to 6 solenoid valve (valve device)
10, 10A, 10C, 10E, 10F, 10H Plunger tube (valve housing)
11 valve chamber 12, 12A, 12C, 12E, 12F, 12H peripheral wall 13, 13A, 13C, 13D, 13E, 13F, 13H, flat portion 14, 14A to 14H communicating hole 20 plunger 30 valve body 40 valve seat member 50 Suction child 60 coil spring 70 electromagnetic coil 81 first joint (pipe member)
81A to 81H Joint (Piping member)
82 second joint 91 first welding portion 92 second welding portion 95, 96 tube material

Claims (10)

A manufacturing method of a valve device comprising: a cylindrical valve housing made of metal; and one or more piping members made of metal different from the valve housing and joined to a peripheral wall of the valve housing. ,
A peripheral wall portion of the valve housing is formed into a cylindrical curved surface portion, and one or more communication holes are formed, which communicate the inside and the outside of the valve housing and into which one end portion of the one or more piping members is fitted. at least one planar moiety, as well as have a, there is said planar portion is formed in a concave shape with respect to the curved surface portion,
The one or more piping members are fitted at one end with the corresponding one or more communication holes, and the metal is mixed with the communication holes and the piping member by welding. A manufacturing method of a valve device characterized by joining to a plane part by laser welding inside a side of the curved surface part in the state where the tube material which was constituted was inserted.   The valve according to claim 1, wherein the valve housing is made of stainless steel, and the pipe member is made of copper or a copper alloy containing copper as a main component. Device manufacturing method.   As the tube material, one having a metal selected from the group consisting of nickel, lithium, bismuth, gold and platinum as a main component, or a phosphorus copper solder, a silver solder or a nickel solder is used. The manufacturing method of the valve apparatus as described in-. The peripheral wall portion of the valve housing has the flat portion on the outer peripheral surface side, and
The method of manufacturing a valve device according to any one of claims 1 to 3, wherein a case where a step portion overlapping the flat surface portion is used as the piping member is excluded. A valve device comprising: a cylindrical valve housing made of metal; and one or more piping members made of metal different from the valve housing and joined to a peripheral wall of the valve housing.
A peripheral wall portion of the valve housing is formed into a cylindrical curved surface portion, and one or more communication holes are formed, which communicate the inside and the outside of the valve housing and into which one end portion of the one or more piping members is fitted. a planar portion of at least one of the outer peripheral surface side, as well as have the said flat portion is formed in a concave shape with respect to the curved surface portion,
One end of each of the one or more piping members is fitted to the corresponding one or more communication holes,
The pipe member and the flat portion are joined by a weld formed between them, inside the curved portion .
The said welding part is a valve apparatus characterized by mixing the metal which comprises the said valve housing, the metal which comprises the said piping member, and another metal material.   The valve device according to claim 5, wherein the valve housing is made of stainless steel, and the piping member is made of copper or a copper alloy containing copper as a main component.   The above-mentioned other metal material is characterized by comprising one metal selected from the group consisting of nickel, lithium, bismuth, gold and platinum as a main component, or phosphorus copper solder, silver solder or nickel solder. The valve apparatus of claim 6. The peripheral wall portion of the valve housing has the flat portion on the outer peripheral surface side,
The valve device according to any one of claims 5 to 7, wherein the pipe member has a stepped portion overlapping the flat surface portion. A manufacturing method of a valve device comprising: a cylindrical valve housing; and one or more piping members joined to a peripheral wall of the valve housing,
A peripheral wall portion of the valve housing is formed into a cylindrical curved surface portion, and one or more communication holes are formed, which communicate the inside and the outside of the valve housing and into which one end portion of the one or more piping members is fitted. a planar portion of at least one of the outer peripheral surface side, as well as have a, there is said planar portion is formed in a concave shape with respect to the curved surface portion,
The one or more piping members are joined by laser welding to the flat surface portion inside the curved surface portion in a state in which one end portion is fitted in the corresponding one or more communication holes respectively;
The pipe member and the flat portion are joined by forming a welded portion between them (however, a case is used where the pipe member has a step portion overlapping the flat portion). The method of manufacturing the valve device. A valve device comprising: a cylindrical valve housing; and one or more piping members joined to a circumferential wall of the valve housing.
A peripheral wall portion of the valve housing is formed into a cylindrical curved surface portion, and one or more communication holes are formed, which communicate the inside and the outside of the valve housing and into which one end portion of the one or more piping members is fitted. a planar portion of at least one of the outer peripheral surface side, as well as have the said flat portion is formed in a concave shape with respect to the curved surface portion,
One end of each of the one or more piping members is fitted to the corresponding one or more communication holes,
The piping member and the flat surface portion are joined by a weld formed between them inward of the curved surface portion (however, the piping member overlaps the flat surface portion) The valve device except when it has a step.

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