JP2007209994A - Silver solder welding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sliver solder welding method by which work for equalizing an upper gap is simplified. <P>SOLUTION: The silver solder welding method is provided in which a main-body part 21 of a pipe member 20 is inserted into a vertical through-hole 11 of a base member 10 and a silver solder 40 is molten and is poured from above into a gap 80 which is formed by the outer circumferential surface 23 of the main-body part 21 of the pipe member and the peripheral surface 14 of the vertical through-hole 11 of the base member and a gap 70 which is formed by the upper surface 26 of a flange part 22 which is extended outward from the main-body part 21 of the pipe member 20 and the under surface 12 of the base member 10, thereby the base member 10 and the pipe member 20 are stuck to each other. The silver solder welding method is characterized in that three or more projected parts 24 having the same shape for the upper gap are provided beforehand at equal intervals in the peripheral direction and, when assembling the pipe member 20 to the base member 10 so that the upper gap 80 and the lower gap 70 are generated, that assembling state is held by pressing the peripheral surface 14 of the vertical through-hole 11 of the base member with the projected parts 24 for the upper gap. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a silver soldering method suitable for fixing a base member of a solenoid and a pipe member assembled to a valve body of a solenoid valve.

  Conventionally, a silver soldering method for fixing a base member and a pipe member of a solenoid assembled to a valve body of a solenoid valve has been performed as follows.

That is, in FIG. 11, the conventional silver soldering method is as follows: (1) The main body portion 21 of the pipe member 20 is inserted into the through-hole 11 of the base member 10; Between the outer peripheral surface 23 of the member main body portion 21 and the peripheral surface 14 of the base member through vertical hole 11, and the upper surface 26 of the flange portion 22 extending outward from the main body portion 21 of the pipe member 20 and the lower surface 12 of the base member 10. (3) The upper surface 15 around the through-hole 11 of the base member 10 and the pipe member are maintained in a state in which predetermined gaps 80 and 70 (hereinafter also referred to as upper gap and lower gap) are formed respectively. A flux 101 is applied to the outer peripheral surface 23 of the main body 21 near the base member 10 with a brush, and a silver brazing 102 is set thereon. (4) A silver coiling 102 is melted by energizing a work coil for high frequency welding (not shown). It poured into the upper gap 80 and lower gap 70, and finally the base member 10 and the pipe member 20 had to be fixed. Prior to this application, prior art was investigated, and as a result, Patent Document 1 was found.
JP 2003-222261 A

  However, according to the conventional silver soldering method, the work of making the upper gap 80 uniform, the work of making the lower gap 70 uniform, and the center line of the through-hole 11 of the base member 10 and the main body 21 of the pipe member 20 There is a problem that the centering operation for matching the center line with the center line is complicated.

  The present invention is not limited to the pipe member with a flange portion as described above, but can be applied to a pipe member including only a main body portion without a flange portion. An object of the present invention is to provide a silver soldering method that can solve the problem and can simplify the work of making at least the upper gap uniform.

  The silver brazing welding method of the present invention inserts a pipe member into a through hole of a base member, and silver brazing from above into a gap formed by the outer peripheral surface of the pipe member and the peripheral surface of the base member through vertical hole. In the silver brazing welding method in which the base member and the pipe member are fixedly melted and poured, three or more gap protrusions having the same shape at equal intervals in the circumferential direction are provided on the outer peripheral surface of the pipe member main body. When the pipe member is assembled to the base member so that the gap is provided in advance, the upper gap projection presses the peripheral surface of the base member through vertical hole, and the assembled state is maintained. Features.

  According to the silver brazing welding method of the present invention, when the pipe member is assembled to the base member, the gap projections press the peripheral surface of the base member through vertical hole to form a uniform gap. For this reason, simplification of the operation | work which makes a clearance gap uniform can be aimed at.

  Here, when a plurality of sets of the gap protrusions are provided in the vertical direction, the assembled state when the thickness of the base member is thick can be made more reliable.

  In the silver soldering method of the present invention, the pipe member body is inserted into the through hole of the base member, and is formed by the outer peripheral surface of the pipe member main body and the peripheral surface of the base member through vertical hole. The base member and the pipe member are melted and poured from above into the upper gap and the lower gap formed by the upper surface of the flange portion extending outward from the pipe member main body and the lower surface of the base member. Are provided in advance on the outer peripheral surface of the pipe member main body with three or more identically spaced upper gap protrusions at equal intervals in the circumferential direction, and the upper gap and the lower gap are When the pipe member is assembled to the base member so as to be generated, the protrusion for upper gap presses the peripheral surface of the base member through vertical hole, and the assembled state is maintained.

  According to the silver brazing welding method of the present invention, when the pipe member is assembled to the base member, the upper gap protrusions press the peripheral surface of the base member through vertical hole to form a uniform upper gap. For this reason, it is possible to simplify the work of making the upper gap uniform.

  Here, if a lower gap protrusion for generating the lower gap when it comes into contact with the lower surface of the base member is provided in advance on the upper surface of the pipe member flange portion, the work for making the lower gap uniform can be simplified. It can be done at the same time. At the same time, centering for matching the center line of the base member through vertical hole with the center line of the pipe member main body is easily performed.

  If the lower gap protrusions have three or more identical shapes that are equally spaced in the circumferential direction, a more uniform lower gap can be formed.

  If the lower gap projection is formed of an annular projection provided at the tip of the pipe member flange, the melted silver solder fills the lower gap when the amount of silver braze is somewhat excessive during welding. Furthermore, even if it tries to flow to the front of the lower gap, it is blocked by the annular protrusion. For this reason, the amount of silver wax flowing forward from the annular protrusion is greatly reduced, and contamination of the lower surface of the base member due to excess silver wax can be prevented. Therefore, the extra work for removing the solidified extra silver solder and smoothing the lower surface of the base member becomes unnecessary.

  The base member and the pipe member are components of a solenoid that is assembled to a valve body of a solenoid valve. When the solenoid is assembled to the valve body, an outer side of the annular protrusion is formed on the lower surface of the base member. Further, a seal ring of the valve body is arranged. As described above, the lower surface of the base member is prevented from being contaminated and the lower surface can be maintained as a smooth surface, so that the adhesion between the base member and the seal ring can be ensured and the sealing performance can be maintained.

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

  FIG. 1 is an exploded cross-sectional view of an essential part of a solenoid valve incorporating a solenoid that is an example of use of a silver soldering method according to an embodiment of the present invention, and FIGS. 2A and 2B are configurations of the solenoid. 3A, 3B, and 3C are explanatory views of press working for forming a protrusion on the base member, and FIG. Sectional drawing of the assembly | attachment body of a base member and a pipe member and FIGS. 5-7 each show the operation | work process drawing of a silver brazing welding method.

  1 and 2, the electromagnetic valve 1 includes a valve main body 2 and a solenoid 3 assembled to the valve main body 2. The solenoid 3 includes a fixed core unit 4 and a movable core 5 accommodated in the hollow portion 4a of the fixed core unit 4 so as to be slidable in the axial direction. In addition, although not shown, an outer peripheral surface 4b of the fixed core unit 4 is provided. A solenoid coil and a housing case are arranged on the side.

  The fixed iron core unit 4 includes a base member 10, a pipe member 20, and a fixed iron core 30.

  The base member 10 is made of a magnetic material or a nonmagnetic material, and is configured in a donut plate shape having a through vertical hole 11 in the center.

  The pipe member 20 is made of a magnetic material or a non-magnetic material, and includes a hollow cylindrical main body portion 21 and an annular flange portion 22 extending outward from the lower end of the main body portion 21.

  At a predetermined height position in the vicinity of the flange portion 22 on the outer peripheral surface 23 of the main body portion 21, there are upper gap protrusion portions 24 by stamping at three or more (four in the present embodiment) equally spaced in the circumferential direction. Is formed. When the pipe member 20 is assembled to the base member 10, the upper gap protrusion 24 forms a uniform upper gap 80 between the outer peripheral surface of the pipe member main body 21 and the peripheral surface 14 of the base member through vertical hole 11. It is for forming. Each of the upper gap protrusions 24 has the same shape, and its height is, for example, about 0.1 mm. When the base member 10 is thick, if a plurality of upper gap projections 24 are provided in the vertical direction, the upper gap 80 can be made more uniform, and an assembly as will be described later. The 90 assembled state can be further stabilized.

  The upper surface 26 of the flange portion 22 is provided with three or more (four in the present embodiment) lower gap protrusions 28 having the same shape at equal intervals in the circumferential direction. The lower gap projection 28 is used to form a uniform lower gap 70 between the upper surface 26 of the pipe member flange 22 and the lower surface 12 of the base member 10 when the pipe member 20 is assembled to the base member 10. Is. The height of each lower gap projection 28 is, for example, about 0.1 mm. Note that the number of the lower gap protrusions 28 is not limited to three or more, and a substantially uniform lower gap 70 can be formed even if one or two.

  The lower gap protrusion 28 is formed by pressing as shown in FIG. This pressing is performed using the die 110 and the punch 120. As shown in FIGS. 3A and 3C, the die 110 has an opening 111 that opens upward, and an upper surface portion in which four grooves 112a are formed around the opening 111 at equal intervals in the circumferential direction. 112. As shown in FIGS. 3 (A) and 3 (B), the punch 120 includes a downward projecting portion 121 that can be inserted into the hollow portion 4a of the pipe member 20 set in the die 110, and a periphery of the projecting portion 121. The lower surface portion 122 has a protrusion 122a formed at a position facing the groove 112a. In the press working, the pipe member 20 is set on the die 110 as shown in the figure, and then the punch 120 is lowered, and the flange portion 22 of the pipe member 20 is pressed by each projection portion 122a of the die 110, thereby the flange portion 22 is pressed. A lower gap projection 28 is formed on the upper surface 26 of the substrate.

  A step portion 31 of the fixed iron core 30 is inserted into the upper end opening portion 25 of the main body portion 21, and the upper end opening portion 25 and the step portion 31 are fixed by welding.

  The base member 10 is fixed to the corner portion 27 of the pipe member 20 constituted by the lower end of the outer peripheral surface 23 of the main body portion 21 and the upper surface 26 of the flange portion 22 by a silver soldering method. 1 and 2, reference numeral 40 represents a silver wax.

  The fixed iron core unit 4 is assembled to the valve body 2 in a state where the base member 10 is accommodated in the recess 2 a of the valve body 2. After this assembly, the seal ring 2b of the valve body 2 is located outside the flange portion 22 and is in close contact with the lower surface 12 of the base member 10.

  Next, a silver soldering method for fixing the pipe member 20 and the base member 10 in the fixed core unit 4 shown in FIGS. 1 and 2 will be described with reference to FIGS.

  First, prior to the silver soldering operation, an assembly 90 of the pipe member 20 and the base member 10 as shown in FIG. The assembly 90 can be obtained by press-fitting the pipe member 20 into the through vertical hole 11 of the base member 10. In this assembly 90, the four upper gap protrusions 24 are located at equal intervals in the circumferential direction and have the same shape, so the upper gap 80 is uniform. The four lower gap protrusions 28 are equally spaced in the circumferential direction and have the same shape and are in contact with the lower surface 12 of the base member 10, so that the lower gap 70 is uniform. . Further, the center line of the base member through vertical hole 11 and the center line of the pipe member main body portion 21 coincide with each other, and centering is performed.

  Next, a silver soldering operation for fixing the base member 10 and the pipe member 20 is started. As shown in FIG. 5, the silver soldering work is performed on the upper surface 15 around the through-hole 11 of the base member 10 as shown in FIG. 5 with respect to the assembly 90 of the pipe member 20 and the base member 10 assembled by the above-described assembling work. The brush 101 is applied to the outer peripheral surface 23 of the main body 21 of the pipe member 20 in the vicinity of the base member 10 with the brush 100. Next, as shown in FIG. 6, a silver rolling 102 is set on the flux 101. Next, as shown in FIG. 7, the assembly 90 on which the silver brazing 102 is set is set on the high-frequency welding jig 103, and the work coil 104 for high-frequency welding is energized. By energizing the work coil 104 for high frequency welding, the silver brazing 102 is melted by heat, and the melted silver brazing is between the outer peripheral surface 23 of the pipe member main body 21 and the peripheral surface 14 of the base member through vertical hole 11. And then flows into the lower gap 70 between the upper surface 26 of the pipe member flange portion 22 and the lower surface 12 of the base member 10 to fill the upper gap 80 and the lower gap 70. . Thereafter, the silver solder 40 is solidified, and the fixed iron core unit 4 as shown in FIG. 2 is obtained.

  As described above, in the silver soldering method according to the present embodiment, the main body portion 21 of the pipe member 20 is inserted into the through vertical hole 11 of the base member 10, and the outer peripheral surface 23 of the pipe member main body portion 21 and the base member through vertical hole are inserted. A gap 80 formed by the peripheral surface 14 of the hole 11 and a gap 70 formed by the upper surface 26 of the flange portion 22 extending outward from the main body portion 21 of the pipe member 20 and the lower surface 12 of the base member 10, In the silver brazing welding method in which the silver solder 40 is melted and poured from above and the base member 10 and the pipe member 20 are fixed, three or more identical shapes at equal intervals in the circumferential direction are formed on the outer peripheral surface 23 of the pipe member main body 21. When the pipe member 20 is assembled to the base member 10 so that the upper gap protrusion 24 is provided in advance and the upper gap 80 and the lower gap 70 are generated, the upper gap protrusion 24 is formed in the base member through vertical hole. The first circumferential surface 14 is pressed, with the assembled state is maintained.

  According to the silver brazing welding method of the present embodiment, when the pipe member 20 is assembled to the base member 10, the upper gap protrusion 24 presses the peripheral surface 14 of the base member through vertical hole 11, thereby uniform upper gap 80. Is formed. For this reason, the work of making the upper gap 80 uniform can be simplified.

  Further, since the silver soldering method of the present embodiment is provided in advance with the lower gap protrusion 28 that generates the lower gap 70 when it comes into contact with the lower surface 12 of the base member on the upper surface 26 of the pipe member flange portion 22, the lower gap Simplification of the work of making 70 uniform can also be achieved at the same time. At the same time, the centering of the base member through vertical hole 11 and the center line of the pipe member main body portion 21 are easily aligned.

  FIG. 8 is a cross-sectional view of a main part of an assembly 90 according to another embodiment.

  The assembly 90 according to the other embodiment has a ring-like shape in which the lower gap protrusion 28 on the upper surface 26 of the pipe member flange portion 22 is higher than the flat base portion of the flange portion upper surface 26 by a predetermined dimension, for example, 0.1 mm. It is characterized by having comprised by the protrusion part of this, ie, a cyclic | annular protrusion part, and the other structure is the same as that of the assembly | attachment 90 mentioned above.

  The annular protrusion 28 is formed by pressing as shown in FIG. This press work is performed using the die 110 and the punch 120 as in the press work shown in FIG. The die 110 has an opening 111 that opens upward and an upper surface 112. The upper surface portion 112 includes an annular base portion 112a on which the base portion of the flange portion 22 of the pipe member 20 is placed, and an annular concave portion 112b extending outward from the annular base portion 112a. The punch 120 has an annular convex portion 121 that can enter the annular concave portion 112 b of the die 110. In the press working, the pipe member 20 is set on the die 110 as shown in the drawing, and then the punch 120 is lowered, and the flange portion 22 of the pipe member 20 is pressed by the annular convex portion 121 of the die 110 to thereby form the flange portion 22. An annular protrusion 28 is formed on the top surface 26 of the tip of the tip.

  If the lower gap projection 28 is formed of an annular projection provided at the tip of the pipe member flange 22 as described above, the melted silver braze 40 can be obtained when the amount of the silver braze 40 is excessively large during welding. Even when the lower gap 70 is filled and further flows to the front of the lower gap 70, the ring-shaped protrusion 28 is dammed up. For this reason, the amount of the silver solder 40 flowing forward from the annular protrusion 28 is greatly reduced, and contamination of the lower surface 12 of the base member 10 by excess silver solder 40 can be prevented. Therefore, the extra work for removing the solidified extra silver solder 40 and smoothing the lower surface 12 of the base member 10 becomes unnecessary.

  The base member 10 and the pipe member 20 are components of the solenoid 3 assembled to the valve body 2 of the electromagnetic valve 1. When the solenoid 3 is assembled to the valve body 2, an annular protrusion is formed on the lower surface 12 of the base member 10. 28, the seal ring 2b of the valve body 2 is disposed outside. As described above, the lower surface 12 of the base member 10 is prevented from being contaminated, and the lower surface 12 can be maintained as a smooth surface. Therefore, the adhesion between the base member 10 and the seal ring 2b can be secured, and the sealing performance can be maintained.

  FIG. 10 shows a cross-sectional view of the main part of an assembly 90 according to still another embodiment.

  The assembly 90 according to this embodiment is configured by removing the pipe member 20 from only the main body 21, that is, the flange portion 22, and the other configurations are the same as those of the assembly 90 described above.

  According to the silver soldering method of this embodiment, when the pipe member 20 is assembled to the base member 10, the gap protrusion 24 presses the peripheral surface 14 of the base member through vertical hole 11, thereby forming a uniform gap 80. Is done. For this reason, the work of making the gap 80 uniform can be simplified.

  Here, in the case where the thickness of the base member 10 is thick, by providing a plurality of gap protrusions 24 in the vertical direction, the gap 80 is made more uniform and the assembled state of the assembly 90 is more stable. It can be made.

It is a principal part exploded sectional view of the solenoid valve in which the solenoid which is an example of use object of the silver soldering method concerning one embodiment of the present invention is built. (A), (B) is the principal part sectional drawing and bottom view of a fixed iron core unit which are the components of the solenoid. (A), (B), (C) is an explanatory diagram of press working for forming a protrusion on the base member, (A) is a schematic configuration diagram of the press device, (B) is a bottom view of the punch , (C) is a plan view of the die. It is sectional drawing of the assembly | attachment body of a base member and a pipe member. It is process drawing for demonstrating the silver brazing welding method with FIG.6 and FIG.7. It is process drawing for demonstrating the silver brazing welding method with FIG.5 and FIG.7. It is process drawing for demonstrating the silver brazing welding method with FIG.5 and FIG.6. It is principal part sectional drawing of the fixed iron core unit which concerns on other embodiment. It is a schematic block diagram of a press apparatus. It is principal part sectional drawing of the assembly | attachment body which concerns on other embodiment. It is principal part sectional drawing of the fixed iron core unit obtained by the conventional silver soldering method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Solenoid valve 2 Valve body 2b Seal ring 3 Solenoid 10 Base member 11 Through vertical hole 12 Lower surface 14 Peripheral surface 20 Pipe member 21 Main body (pipe member)
22 Flange part 23 Outer peripheral surface 24 Upper gap protrusion (gap protrusion)
26 Upper surface 28 Lower gap protrusion 40 Silver solder 70 Lower gap 80 Upper gap

Claims (7)

A pipe member is inserted into the through-hole of the base member, and silver wax is melted and poured from above into a gap formed by the outer peripheral surface of the pipe member and the peripheral surface of the base-member through vertical hole. In the silver soldering method for fixing the pipe member,
When three or more gap protrusions having the same shape in the circumferential direction are provided on the outer circumferential surface of the pipe member in advance, and the pipe member is assembled to the base member so that the gap is generated, the upper gap The silver brazing welding method, wherein the protruding portion presses the peripheral surface of the base member through vertical hole and the assembled state is maintained.   The silver brazing welding method according to claim 1, wherein a plurality of sets of the gap protrusions are provided in the vertical direction. From the pipe member main body portion, the main body portion of the pipe member is inserted into the through vertical hole of the base member, the upper gap formed by the outer peripheral surface of the pipe member main body portion and the peripheral surface of the base member through vertical hole, and the pipe member main body portion In a silver brazing welding method for melting and pouring silver solder from above into a lower gap formed by the upper surface of the flange portion extending outward and the lower surface of the base member, and fixing the base member and the pipe member,
The pipe member is provided on the base member so that the upper gap and the lower gap are formed in advance on the outer circumferential surface of the pipe member main body by providing three or more identically spaced upper gap projections at equal intervals in the circumferential direction. The silver brazing welding method, wherein when assembled, the projection for upper gap presses the peripheral surface of the base member through vertical hole, and the assembled state is maintained.   The silver brazing welding method according to claim 3, wherein a lower gap protrusion is provided in advance on the upper surface of the pipe member flange portion to generate the lower gap when abutting against the lower surface of the base member.   5. The silver soldering method according to claim 4, wherein the lower gap protrusions have three or more identical shapes at equal intervals in the circumferential direction.   The silver brazing welding method according to claim 4, wherein the lower gap protrusion includes an annular protrusion provided at a tip of the pipe member flange. The base member and the pipe member are components of a solenoid that is assembled to a valve body of a solenoid valve. When the solenoid is assembled to the valve body, an outer side of the annular protrusion is formed on the lower surface of the base member. The silver brazing welding method according to claim 6, wherein a seal ring of the valve main body is arranged on the surface.

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