JP2020029827A - Manufacturing method of fluid spray plate and fluid spray plate - Google Patents

Abstract

To obtain a fluid spray plate which is favorable in flatness by a surface-joining, in the fluid spray plate which is formed by superimposing sheets on each other.SOLUTION: This manufacturing method of a fluid spray plate has: a preparation process 220 for preparing sheets to be processed; a punching process 230 for forming a variety of holes at a sheet A20 and a sheet B30 by using a metal mold 231 being a trimming mold; a superimposition process 240 for superimposing the punched sheet A20 and sheet B30 with a solder material 21 sandwiched therebetween; a joining process 250 for joining the superimposed sheet A20 and sheet B30 by using an electrode head 251; a spray hole forming process 260 for forming spray holes at the joined sheets by using a metal mold 261; a punching process 270 for punching contours from the sheets at which the spray holes are formed, by using a metal mold 271; and a takeout process 280 for taking out a punched fuel spray orifice plate 100.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a method for manufacturing a fluid spray plate and a fluid spray plate.

BACKGROUND ART It is known to manufacture a component or the like by subjecting a band-shaped body, which is a band-shaped raw material, to various processes along a longitudinal direction.
For example, in Patent Literature 1, a thin region is formed by etching a sheet material from one side, and a strip-shaped piece in which the thin region is disposed at a predetermined interval in a longitudinal direction is formed on the sheet material. An etching target sheet material forming step of forming a plurality of arrays by applying etching from both sides, and separating a plurality of strip-like pieces from the etching target sheet material, and an end engaging portion provided at one end of one strip-like piece. An engaging step of engaging the other end engaging portion provided at the other end of the other strip-shaped piece by utilizing the shape of the wall surface obtained as a result of etching from both sides in the etching target sheet material forming step And a machining step of sending out the band-like body in which the plurality of strip-shaped pieces are engaged by the engaging step and continuously performing machining on an area including the thin area. Manufacturing method disclosed It has been.
Further, for example, in Patent Document 2, a metallic thin film (35) is prepared, the same opening geometric shape (27) is provided in the thin film (35), and the individual thin films (35) are formed using a centering device (57). ) Are overlapped and the membrane (35) is joined using a joining method to form a perforated disc band (39) with a number of circular plates (53), and the perforated disc band (39) is A method is disclosed for making a perforated disc for an injection valve, which comprises performing a method step of individualizing the perforated disc (21) or the circular plate (53).

Japanese Patent No. 6259139 JP 2000-517025 A

When a fluid spray plate such as an orifice plate is finally manufactured by stacking two sheets, manufacture of a fluid spray plate having grooves can be performed more easily than in the case of manufacturing by cutting a sheet.
Here, the bonding surface where the two sheets are overlapped by resistance connection or the like becomes at least smaller than the size of the electrode head. For example, when continuous sheets are used, it is difficult to perform surface bonding of the entire surface of the sheets. Therefore, when a continuous strip is used, the joined portions and the non-joined portions are alternately present at a constant pitch, which is a factor inhibiting flatness. In addition, when the bonding is performed while applying pressure, the melted portion pressed by the pressure of the electrode head is pushed to the outer periphery, and accumulates at the boundary with the non-melted portion or permeates into the gap, and after solidification, It may cause flatness to be impaired.

  An object of the manufacturing method of the present invention is to obtain a fluid spray plate formed by laminating sheets and having good flatness by surface joining.

The invention described in claim 1 is a first sheet obtaining step of obtaining a first sheet having a brazing material formed on one side, and a second sheet obtaining a second sheet contacting the one side of the first sheet. An obtaining step, a function groove forming step of forming a function groove for adjusting fluid movement in the first sheet, and a distance between an effective area and a non-effective area with respect to at least one of the first sheet and the second sheet. A step of forming an extended area, an joining step of joining the first sheet and the second sheet with the brazing material, and a spray of forming a spray hole for spraying a fluid on the second sheet. A hole forming step; and a removing step of removing the fluid spray plate from the joined first and second sheets, wherein the effective area is determined by an inner edge of the distance area and the removing is performed. And a disconnecting region surrounding the outer and the outer shape of the fluid spray plate to be taken out by the process, the bonding process is a method of producing a fluid spray plate, characterized in that bonding the active area.
According to a second aspect of the present invention, in the joining step, the first end is pressed against an area between an inner edge and an outer edge of the distance area so that the outer edge of the tip of the joining head is positioned. The method for manufacturing a fluid spray plate according to claim 1, wherein a sheet and the second sheet are joined.
In the invention described in claim 3, the distance region forming step includes a groove provided along an outer end of the effective region, and a connecting portion connecting the effective region and the non-effective region. The method for manufacturing a fluid spray plate according to claim 1, wherein the distance region is formed by performing the distance.
In the invention described in claim 4, the distance region forming step includes forming a distance region on the first sheet and the second sheet, and determining a position of the connection portion formed on the first sheet and a position of the connection portion. 4. The fluid according to claim 3, wherein the position of the connection portion formed on the second sheet is shifted when the first sheet and the second sheet are overlapped when they are joined. This is a method for manufacturing a spray plate.
In the invention described in claim 5, a reference hole forming step of forming a reference hole serving as a position reference for processing on the first sheet, and overlapping when the first sheet and the second sheet are joined. The method according to any one of claims 1 to 4, further comprising: a hole forming step of forming a hole in the second sheet that does not block the reference hole when the reference hole is formed. It is.
The invention described in claim 6 is characterized in that the reference hole formed in the reference hole forming step has a smaller outer shape than the hole formed in the hole forming step. This is a method for manufacturing a fluid spray plate.
In the invention described in claim 7, in the functional groove forming step, the functional groove is formed based on the reference hole formed in the first sheet, and the spray hole forming step is formed in the first sheet. 7. The method according to claim 5, wherein the spray holes are formed in the second sheet based on the formed reference holes.
The invention described in claim 8 is a method for manufacturing a fluid spray plate, wherein a first sheet obtaining step of obtaining a first sheet having a brazing material formed on one side thereof, and contacting the one side of the first sheet. A second sheet obtaining step of obtaining a second sheet to be performed, a function groove forming step of forming a function groove for adjusting fluid movement in the first sheet, and at least one of the first sheet and the second sheet. A groove forming step of forming a groove having an inner edge on an outer side larger than a take-out area forming an outer shape of the fluid spray plate, and a joining step of joining the first sheet and the second sheet with the brazing material; After the joining step, a spray hole forming step of forming a spray hole for spraying a fluid in the second sheet, and a step of removing the fluid spray plate from the joined first sheet and the second sheet. And removing step of issuing a method for producing a fluid spray plate having.
According to a ninth aspect of the present invention, in the joining step, the first sheet and the second sheet overlapped via the brazing material are joined by pressing a leading end of a joining head to form the groove. In the step, the outer edge of the leading end of the joining head pressed against the first sheet and the second sheet in the joining step can be positioned between the inner edge of the groove and the outer edge of the groove, 9. The method according to claim 8, wherein the groove is formed.
10. The fluid according to claim 8, wherein in the removing step, the fluid spray plate is removed inside the groove formed in the groove forming step. This is a method for manufacturing a spray plate.
In the invention described in claim 11, in the groove forming step, a connection portion that connects an inner edge side of the groove and an outer edge side of the groove is formed in the first sheet and the second sheet, The position of the connecting portion formed on one sheet and the position of the connecting portion formed on the second sheet are shifted when they are overlapped when the first sheet and the second sheet are joined. The method of manufacturing a fluid spray plate according to any one of claims 8 to 10, wherein the method is formed as follows.
The invention described in claim 12 includes a first groove having a function groove for adjusting the fluid movement of the fuel fluid, the first sheet having a predetermined thickness which is preferable for adjusting the fluid movement, and the first sheet. A second sheet having a spray hole for spraying the fuel fluid whose fluid movement has been adjusted by the functional groove, and a joining portion joining the first sheet and the second sheet. Fluid spray plate.
The invention according to claim 13 is the fluid spray plate according to claim 12, wherein the thickness of the second sheet is smaller than the thickness of the first sheet.
According to a fourteenth aspect of the present invention, the joint portion is formed of a brazing material that is fixed after being melted, and is the same as the take-out surface of the first sheet and the second sheet at the outer portion of the fluid spray plate. 14. The fluid spray plate according to claim 12, wherein the fluid spray plate forms a surface.

According to the method of manufacturing a fluid spray plate according to claim 1, the fluid spray plate formed by superimposing two sheets is melted only in an effective area which is separated by a long distance and joined. The flatness due to the surface bonding at the time of bonding can be improved as compared with the case where the bonding is not performed.
According to the manufacturing method of the fluid spray plate of the second aspect, the joining is performed as compared with the case where the tip is not pressed so that the outer edge of the tip of the joining head is located in the area between the inner edge and the outer edge of the distance area. Process equipment can be downsized.
According to the manufacturing method of the fluid spray plate according to the third aspect, the effective area to be joined and the non-effective area not to be joined are compared with the case where the effective area to be joined is not extended by the extended area having the groove and the connection portion. Higher flatness can be secured in a state where the bias is suppressed.
According to the method for manufacturing a fluid spray plate according to the fourth aspect, a relief area for the brazing material can be secured at the position of the connection portion.
According to the manufacturing method of the fluid spray plate according to the fifth and sixth aspects, the positioning at the time of processing can be unified to the reference hole of the first sheet.
According to the manufacturing method of the fluid spray plate according to the seventh aspect, the positional accuracy between the formation position of the function groove formed in the first sheet and the formation position of the spray hole formed in the second sheet is determined by the present configuration. It can be increased as compared with the case where it is not adopted.

According to the manufacturing method of the fluid spray plate according to the eighth aspect, in a case where a configuration is not adopted in which a groove having an inner edge is formed outside the take-out area that forms the outer shape of the fluid spray plate, and the spray hole is formed after joining. Compared with this, the flatness is improved and the positional accuracy between the functional groove and the spray hole is improved.
According to the method of manufacturing a fluid spray plate according to the ninth aspect, it is possible to obtain a fluid spray plate having good flatness in a state in which current bias is suppressed as compared with a case where this configuration is not employed.
According to the method of manufacturing a fluid spray plate according to the tenth aspect, the first sheet, the second sheet, and the dispensing surface of the brazing material after dissolution can be made uniform as compared with a case where this configuration is not used.
According to the method for manufacturing a fluid spray plate according to the eleventh aspect, a relief area for the brazing filler metal can be secured at the position of the connection portion.
According to the fluid spray plate of the twelfth aspect, it is possible to reduce the problem that the R exists at the corner of the functional groove formed by cutting one plate material and affects the fluid movement.
According to the fluid spray plate of the thirteenth aspect, it is possible to select the first sheet and the second sheet in consideration of the characteristics of the structure to be formed, as compared with the case where this configuration is not used.
According to the fluid spray plate of the present invention, the outer dimensions of the fluid spray plate are made uniform as compared with the case where the first sheet, the second sheet, and the surface from which the brazing material is taken out after melting are not the same. You.

(A), (b) is a figure which shows the manufacturing method of a fuel spray orifice plate. (A), (b) is the figure which showed the sheet | seat after the process by the punching process. FIG. 7 is a diagram illustrating a state in which a sheet A and a sheet B are overlapped in an overlapping step. (A), (b) is a figure for demonstrating a joining process. It is a figure for explaining a spray hole formation process. (A), (b) is a figure for demonstrating the structure of the fuel spray orifice plate to which this Embodiment is applied. (A), (b) is a figure for demonstrating the state of the junction part based on the relationship between the position of the front-end | tip of an electrode head, and the position of a distance area | region.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In the present embodiment, a description will be given of a manufacturing method and configuration of a fuel spray orifice plate 100 (see FIG. 6 described later) used as an example to spray fuel in a swirl shape into a cylinder of an internal combustion engine (not shown). .

[Method of manufacturing fuel spray orifice plate]
A method of manufacturing a fuel spray orifice plate to which the present embodiment is applied will be described with reference to FIGS.
1A and 1B are views showing a method of manufacturing a fuel spray orifice plate as one of the fluid spray plates. Here, FIG. 1A is a diagram showing a brazing material processing step 210 of plating one surface of the sheet A, and FIG. 1B is a diagram showing one of the brazing materials in the brazing material processing step 210. It is a figure which showed the manufacturing process which manufactures the fuel spray orifice plate 100 from the roll-shaped sheet A20 in which certain plating was formed in one side, and the roll-shaped sheet B30 in which the brazing material was not formed.

[Brazing material processing step]
In the brazing material processing step 210 shown in FIG. 1A, a preparation step 211 for preparing a sheet 10 which is a roll-wound member, and a protective film forming step 212 for attaching a protective film 216 to one surface of the sheet 10 And a plating step 213 for forming a layer of the brazing material 21 on the sheet 10, a protective film peeling step 214 for peeling the protective film 216, and a sheet formed by winding the sheet 10 having the brazing material 21 on one side into a roll. And a winding step 215 for winding as A20.

  The sheet 10 prepared in the preparation step 211 is a metal plate material that is a conductive material, and is made of stainless steel from the viewpoint that it is not corroded, is easily processed, is widely used in the world, and is inexpensive. can do. For example, SUS304 is prepared in a state of being wound in a roll shape. As the sheet 10 to be selected, a sheet having a preferable thickness is determined so as to determine the depth of the swirl groove formed in the fuel spray orifice plate 100 (described later). Before entering the plating process step 213, cleaning and activation which also serves as degreasing are performed to obtain a good plating surface.

  In the protective film forming step 212, a protective film 216 is added to one surface of the sheet 10 prepared in the preparing step 211. As the protective film 216, for example, a film having a base material made of polyester and having an adhesive applied to the surface to be bonded is used.

In the plating step 213, the sheet 10 having the protective film 216 attached to one surface is passed through a nickel plating bath 217, and the brazing material 21 is formed on the other surface where the protective film 216 is not formed. As parameters required for electroless nickel, considering the subsequent resistance bonding,
・ Dissolution occurs preferentially due to high resistance,
Low melting point,
・ A film thickness of several μm is sufficient,
Is required. With respect to the resistance and the melting point, it is preferable to use nickel phosphorus plating. The higher the percentage of phosphorus and the lower the purity, the higher the resistance value and the lower the melting point. General electroless nickel plating solutions are classified into several ranks according to the concentration of phosphorus. In the present embodiment, for example, a high phosphorus type having a high phosphorus concentration of 10 to 13% is used.
Thus, in the nickel plating bath 217, for example, a plating bath using hypophosphite as a reducing agent is used, and the brazing material 21 to be formed is composed of a Ni-P alloy plating film. Hereinafter, the electroless Ni-P plating may be simply referred to as “electroless nickel plating”.

  In the protective film peeling step 214, the protective film 216 is peeled from one surface of the sheet 10 on which the brazing material 21 is formed, via the plating step 213.

  Thereafter, in a winding step 215, the protective film 216 is peeled off from one surface, and the sheet 10 on which the brazing material 21 is formed on one surface, which is the other surface, is wound to form a sheet A20, which is the first sheet. Is done. In addition, the thickness of the electroless nickel plating layer of the sheet A20 thus obtained and obtained is, for example, 1 to 2 μm.

[Manufacturing process of fuel spray orifice plate]
In the manufacturing process illustrated in FIG. 1B, a preparation process 220 for preparing a sheet, which is a plate material to be processed, and various holes are formed in the sheets A20 and B30 by using a die 231 that is a punching die. Punching step 230. In addition, an overlapping step 240 in which the sheet A20 and the sheet B30 punched in the punching step 230 are overlapped with the brazing material 21 interposed therebetween, and a joining step in which the overlapped sheet A20 and the sheet B30 are joined using the electrode head 251. 250. Further, a spray hole forming step 260 for forming a spray hole with the mold 261 on the sheet joined in the joining step 250, and a punching step 270 for punching out the outer shape using the mold 271 from the sheet on which the spray hole is formed. Taking out the punched-out fuel spray orifice plate 100. The punching step 270 and the removal step 280 may be combined into one to be a “removal step”. In the manufacturing process of the fuel spray orifice plate to which the present embodiment is applied, a metal hoop material is surface-bonded using a so-called roll-to-roll, in which a metal sheet wound into a roll is sent out and processed in a winding process. are doing.

[Preparation step 220]
The preparing step 220 includes a first sheet obtaining step and a second sheet obtaining step. In the first sheet obtaining step, for example, a sheet A20 which is a first sheet having a brazing material 21 formed on one surface in a brazing material processing step 210 as shown in FIG. 1A is obtained. In the second sheet obtaining step, a sheet B30, which is a second sheet that is a metal plate material that is a conductive material and has no brazing material formed thereon, is obtained. The sheet B30 is a metal plate material that is a conductive material, and is prepared in a state in which, for example, stainless steel of SUS304 similar to the base material of the sheet A20 is wound in a roll shape. As the selected sheet B30, a sheet having a preferable thickness is selected so as to form a spray hole formed in the fuel spray orifice plate 100 and in consideration of rigidity as a base material (described later).

[Punching step 230]
In the punching step 230, various holes are formed in the sheet A20 and the sheet B30. A first sheet A20 having a brazing material 21 formed on one surface is processed using a mold 231 and a second sheet B30 is processed using a mold 235.
2 (a) and 2 (b) are views showing a sheet after processing by the punching step 230. FIG. 2 (a) shows the processing applied to the sheet A20, and FIG. 2 (b) shows the sheet B30. Shows the processing applied to Note that the punching step 230 functions as one of a function groove forming step, a distance forming step, a groove forming step, a reference hole forming step, a hole forming step, and the like in the present invention.

As shown in FIG. 2A, the sheet A20 has a reference hole 22 serving as a reference position for determining a processing location to be applied to the sheet B30 and the sheet A20, and adjusts fluid movement, that is, imparts a swirl to the fuel fluid. And a swirl groove 23, which is a functional groove for punching, are formed by punching the sheet A20.
The reference hole 22 serves as a reference for feeding the sheet A20, which is a continuous band material, to a processing location at a pitch. In the sheet A20, a plurality of grooves 24 provided along the outer end of the joint region between the sheet A20 and the sheet B30, and a connection portion 25 between the adjacent grooves 24 are formed by punching. The groove 24 has an inner edge 241 and an outer edge 242 of the groove. The connection portion 25 is a “bridge” provided so that the inner chip shape partitioned by the plurality of grooves 24 is not separated from the sheet A20 which is a roll-shaped band material. The connection portion 25 serving as a bridge is provided at several places to suppress separation, and in the example shown in FIG. 2A, four places are formed.

  Further, as shown in FIG. 2B, the sheet B30 has a hole 32, a plurality of grooves 34 provided along the outer end of the joint area between the sheet A20 and the sheet B30, and a gap between the adjacent grooves 34. Is formed by punching. The positions of the inner edge 341 and the outer edge 342 of the groove region formed by the plurality of groove portions 34 substantially coincide with the positions of the inner edge 241 and the outer edge 242 of the groove region formed by the plurality of groove portions 24 of the sheet A20. The connection portion 35 is a “bridge” provided so that the inner chip shape partitioned by the plurality of grooves 34 is not separated from the sheet B30 which is a roll-shaped band material. The connection portions 35 serving as bridges are provided at several places to suppress separation, and are formed at four places in the example shown in FIG. 2B. Further, the connection portion 35 is arranged so as not to overlap with the connection portion 25 of the sheet A20 when the sheet A20 and the sheet B30 are overlapped.

The hole 32 is formed such that when the sheet B30 is overlapped with the sheet A20, the hole formed by the reference hole 22 of the sheet A20 is continuously passed through the sheet B30, and the reference when the sheet B30 is overlapped so that the hole is not closed. The position is determined according to the position of the hole 22. The hole 32 is formed with a slightly larger hole diameter than the reference hole 22. That is, the outer shape of the reference hole 22 is smaller than the outer shape of the hole 32.
The width of the sheet B30 (length in the width direction) may be different from the width of the sheet A20 (length in the width direction). For example,
The width of the sheet B30 may be smaller than the width of the sheet A20, and a plate having a width in which the area where the hole 32 of the sheet B30 is not formed may be used.

  Here, the groove 24 shown in FIG. 2A and the groove 34 shown in FIG. 2B correspond to the size of the tip 251a surrounded by the outer edge of the tip of the electrode head 251 used in the bonding step 250. It is formed. More specifically, a groove region formed by the groove portion 24 and the groove portion 34 is a region located between the inside of the outer end of the tip 251a when the tip 251a of the electrode head 251 contacts, and the outside of the outside end. Is formed. The groove 24 and the groove 34 function as an example of a “distance region” that separates an effective region to be joined in the joining step 250 from a non-effective region that is not joined. Note that the electrode head 251 is an example of the joining head of the present invention.

  2A and 2B, the position of the cut surface 101 of the fuel spray orifice plate 100 punched in the punching step 270 is indicated by a broken line. In the sheet A20 shown in FIG. 2A, a cutout area 28 is a substantially donut-shaped area defined by the outside of the cut surface 101 to be punched later and the inner edge 241 of the groove 24 constituting the “distance area”. The effective area includes the area of the separation area 28 and the fuel spray orifice plate 100. In addition, a region outside the outer edge 242 of the groove 24 forming the “distance region” is defined as a non-effective region 29. Therefore, it can be said that the “extended region” extends between the “effective region” and the “non-effective region”.

Further, in the sheet B30 shown in FIG. 2B, a substantially donut-shaped region defined by the outside of the cut surface 101 to be punched later and the inner edge 341 of the groove portion 34 forming the “distance region” is a separation region 38. Yes, the "effective area" is defined including the area of the separation area 38 and the fuel spray orifice plate 100. In addition, a region outside the outer edge 342 of the groove 34 constituting the “distance region” is defined as a non-effective region 39.
In the present embodiment, a “distance area” is formed in both the sheet A20 and the sheet B30 so as to distance the “effective area” and the “non-effective area”. It is also possible to adopt a mode in which the “distance region” is not formed.

[Overlapping step 240]
In the stacking step 240, the sheet A20 and the sheet B30 on which various holes are formed in the punching step 230 are stacked.
FIG. 3 is a diagram illustrating a state in which the sheet A20 and the sheet B30 are overlapped in the overlapping step 240. FIG. 3 shows a state in which the sheets are superposed such that the front side of the sheet becomes the sheet A20 and the back side becomes the sheet B30. Although the reference hole 22 of the sheet A20 and the hole 32 of the sheet B30 are arranged so that the center positions thereof substantially coincide with each other, the outer shape of the reference hole 22 is smaller than the outer shape of the hole 32, that is, the diameter thereof is smaller. The hole 32 does not block the reference hole 22. As a result, after the sheet A20 and the sheet B30 are joined in the next joining step 250, various subsequent processes such as a punching process are performed based on the reference hole 22. The positions of the groove 24 and the groove 34 substantially coincide with each other by overlapping, but the positions of the connecting portion 25 and the connecting portion 35 serving as bridges are shifted from each other. In the present embodiment, they are shifted from each other by about 45 degrees.

[Joining step 250]
In the joining step 250, the sheet A20 and the sheet B30 overlapped in the overlapping step 240 are sandwiched from above and below by an electrode head 251 which is a joining head, and joined by the brazing material 21.
FIGS. 4A and 4B are views for explaining the bonding step 250. FIG. 4A is an enlarged view of the joining process from the side similarly to FIG. 1B, and FIG. 4B is a view of the sheet A20 and the sheet B30 from above in the vertical direction (vertical direction). FIG.

  On one surface of the sheet A20, a brazing material 21 made of an electroless nickel plating layer is formed in a brazing material processing step 210 shown in FIG. In the overlapping step 240 shown in FIGS. 2B and 3, the sheet A20 and the sheet B30, which are conductive materials overlapped via the brazing material 21, are vertically moved by the electrode head 251 shown in FIG. Is sandwiched from. By passing a current in this state, the temperature of the contact surface rises due to high resistance, and the interface is melted and joined. That is, when two metal hoop materials are stacked and the upper and lower areas of the region that eventually becomes the fuel spray orifice plate 100 are sandwiched between the electrode heads 251 and a high current is applied thereto, the conduction resistance is higher than that of the sheet 10 and the sheet B30. The resistance heat is preferentially applied to the brazing material 21 to self-melt, and the joining is completed by re-fixing by cooling.

  The joining performed in the joining step 250 is based on “resistance welding”. Here, a gap is inevitably generated at the contact interface between the upper and lower sheets of the same material, but in general resistance welding, a contact failure portion when a current flows through the gap becomes high resistance, The high-resistance portion melts itself with heat, thereby completing the joining. However, in the present embodiment, in addition to the general resistance welding, in order to accelerate the melting and complete the melting and joining in a short time, a nickel layer as a joining molten layer as an intermediate layer of the same material sheet And is configured to function as a brazing member. That is, by performing resistance joining using the electroless nickel plating layer (brazing material 21) having a thickness of 1 to 2 μm formed on the sheet A20 as a brazing member, nickel having higher resistance than SUS is preferentially brazed. Since they are melt-bonded as attachment members, bonding of a relatively large area is possible. The melting point of SUS is 1400 ° C. or higher, and the melting point of electroless nickel is about 890 ° C.

  Here, as shown in FIGS. 4A and 4B, the region sandwiched between the electrode heads 251 from above and below includes a region that finally becomes a product. Contains the area. The outer edge of the tip 251 a of the electrode head 251 is larger than the cut surface 101 of the fuel spray orifice plate 100. The outer edge of the tip 251a of the electrode head 251 (the circular portion indicated by a dashed line) is between the inner edge 241 of the groove 24 of the sheet A20 and the outer edge 242 of the groove 24, and the inner edge 341 and the groove 34 of the groove 34 of the sheet B30. Between the outer edge 342 and the outer edge 342.

  FIGS. 7A and 7B are diagrams for explaining the state of the joint based on the relationship between the position of the tip 251a of the electrode head 251 and the position of the distance region. FIG. 7A shows a case where the tip 251a of the electrode head 251 is smaller than the distance region, and FIG. 7B shows the outer edge of the tip 251a of the electrode head 251 located in the distance region. It is a figure showing the case.

In the example shown in FIG. 7A, there is a distance region 71 formed by the groove, and the region where the tip 251 a of the electrode head 251 is located becomes the bonding portion 72. Outside the outer edge of the tip 251a of the electrode head 251 is a non-bonded portion 73, which is a region between the bonded portion 72 and the distance region 71. In the example shown in FIG. 7A, the joint 72 is distorted due to thermal strain between the joint 72 and the non-joint 73, and cannot be joined flat. In addition, since the joining is performed while applying pressure, the melted portion pressed by the head pressure of the electrode head 251 when the brazing material 21 as the electroless nickel plating layer is melted is pushed to the outer periphery. The dissolved portion that has been pushed away accumulates at the boundary with the non-joined portion 73, which is a non-dissolved portion, or becomes trapped in a gap, and after solidification, the dissolved portion also becomes a factor that hinders flatness. Further, since the dissolved nickel is blocked by the undissolved nickel and loses an escape area, and the molten nickel escapes to the central swirl groove 23 side, the amount of nickel protruding to the swirl groove edge increases, and in some cases fuel Fluid movement is affected.
A similar problem occurs when the distal end 251a of the electrode head 251 is pressed without forming any distance region.

  On the other hand, in the example of the present embodiment shown in FIG. 7B, the outer edge of the tip 251 a of the electrode head 251 (indicated by a dashed line) is located in the distance region formed by the groove 24 of the sheet A20 and the groove 34 of the sheet B30. (Circular part shown) is located. As a result, all the regions are joined inside the inner edges 241 and 341 of the grooves 24 and 34 including the distance region. Assuming that the region to be joined is an effective region 77, the effective region 77 includes a region of the fuel spray orifice plate 100 and a separation region 28 surrounding the outer shape (cut surface 101) of the fuel spray orifice plate 100. . As described above, the groove portions 24 and the groove portions 34 are formed around the outer circumference slightly larger than the outer shape (cut surface 101) which is finally required as the fuel spray orifice plate 100. As a result, the electrode head 251 is entirely in contact with the inside of the groove 24 and the groove 34, so that the electroless nickel plating layer in the entire contact is also melted and joined. At this time, the groove portions 24 and the groove portions 34 are melted and serve as escape sites for the nickel extruded by the head pressure, thereby suppressing the flatness inhibition phenomenon caused by the melted portions.

  As described above, the connection portions 25 and 35 are provided in the plurality of groove portions 24 and 34, but when the sheet A20 and the sheet B30 are overlapped, the connection portions 25 and 35 do not overlap each other. Position. Since the positions of the connecting portions 25 and 35 are shifted, the escape of the nickel melted at the connecting portions 25 and 35 can be maintained.

[Spray hole forming step 260]
FIG. 5 is a diagram for explaining the spray hole forming step 260. In the spray hole forming step 260, the spray holes 36 are formed on the sheet B30 of the sheet A20 and the sheet B30 brazed by the joining step 250.

  In opening the spray hole 36 which is a through hole in the spray hole forming step 260, it is necessary to convey the sheet A20 and the sheet B30 to the position of the press machine having the mold 261. In the transport, the movement (during non-pressing) and the stop (during pressing) are repeated. At this time, the band including the joined sheets A20 and B30 is positioned at the time of stopping, that is, at the time of press working, by using a pilot pin (not shown) inserted into each of the plurality of reference holes 22. Will be The processing position of the spray hole 36 is set in accordance with the position of the swirl groove 23 which is a functional groove. The plurality of reference holes 22 and the swirl grooves 23 are formed on the sheet A20 by accurate positioning in the punching step 230. Therefore, the position is determined with respect to the swirl groove 23 of the sheet A20 by opening the spray holes 36 in the sheet B30 as the second sheet in accordance with the plurality of reference holes 22 provided in the sheet A20 as the first sheet. In this state, the spray holes 36 are formed in the sheet B30.

  In the example shown in FIG. 5, the spray holes 36 are formed at four positions, and the inner peripheral surface of each of the obtained spray holes 36 has, for example, a cylindrical shape. The four spray holes 36 are formed at one time, but the four spray holes 36 may be formed plural times and sequentially. These four spray holes 36 are areas through which atomized fuel passes when used as the fuel spray orifice plate 100. If projections exist on these wall surfaces, the flow of the fuel is disturbed. Concerns. For this reason, in the present embodiment, by forming these four spray holes 36 by press working, these wall surfaces are formed into a shape in which projections are unlikely to occur.

[Punching step 270 and take-out step 280]
In the punching step 270, the outer shape of the belt-shaped body including the sheet A <b> 20 and the sheet B <b> 30 is punched using a mold 271 as shown in FIG. In the punching step 270, the strips of the sheet A20 and the sheet B30 joined together in the joining step 250 and having the spray holes formed in the spray hole forming step 260 are drawn out, and a die 271 is used for the drawn-out portion. The procedure of producing the fuel spray orifice plate 100 by sequentially performing punching by press working is repeatedly performed. The strip (cutting waste) from which the fuel spray orifice plate 100 has been punched is wound up again in a roll shape and then discarded.

  In the punching step 270, the strip repeats moving (during non-pressing) and stopping (during pressing), as in the spray hole forming step 260. At this time, as in the spray hole forming step 260, the belt is positioned at the time of stopping, that is, at the time of press working, using pilot pins (not shown) inserted into the plurality of reference holes 22.

  The region punched in the punching step 270 is the cut surface 101 shown by the broken line in FIGS. 5 and 7B. As shown in FIG. 7B, the position of the cut surface 101 is the effective area 77 inside the “distance area” formed by the groove 24 and the groove 34, and further inside the separation area 28. It is. When the fuel spray orifice plate 100 is punched out by the cut surface 101 and is taken out, the separation region 28 is separated from the rolled band material sheets A20 and B30 by the connection portions 25 and 35 as bridges. Without being recovered.

  In the removal step 280, the fuel spray orifice plate 100 manufactured as described above is removed. FIGS. 6A and 6B show the fuel spray orifice plate 100 removed in the removal step 280.

[Structure of fuel spray orifice plate 100]
FIGS. 6A and 6B are diagrams for explaining the configuration of the fuel spray orifice plate 100 as an example manufactured by the above-described manufacturing method and to which the present embodiment is applied. FIG. 6A is a top view of the fuel spray orifice plate 100 viewed from above, and FIG. 6B is a diagram showing a cross section BB of the top view shown in FIG. 6A.

  The fuel spray orifice plate 100 has a circular shape and a disk shape, and a swirl groove 23 formed in the seat A20 is provided on the surface and in the center. Further, inside each of the four blades in the swirl groove 23, there are provided spray holes 36 which are four through-holes penetrating in the thickness direction in the front and back surfaces of the sheet B30. The back surface of the sheet B30 is flat except for a portion where the spray holes 36 are provided. The diameter of the fuel spray orifice plate 100 is about φ10 to φ20. The outer peripheral surface formed by the cut surface 101 has a cylindrical shape. Further, the four spray holes 36 are set to the same diameter (for example, about 1 mm). The inner peripheral surface of the spray hole 36 has a cylindrical shape.

  As shown in FIG. 6B, between the sheet A20 and the sheet B30, there is a joint 50 which is fixed after the brazing material 21 is melted, and the sheet A20 and the sheet B30 are joined by the joint 50. They are fixedly joined. The swirl groove 23 is punched out by a sheet A20, a bottom surface is formed by a sheet B30, and the concave volume is determined by these. When observed microscopically, the joint portion 50 has a shape, for example, a convex shape, which is fixed after extruded toward the concave side on the concave side where the swirl groove 23 is formed. On the other hand, when observed microscopically, the joining portion 50 has a shape cut on the cut surface 101 side in the same manner as the sheets A20 and B30. That is, the joining portion 50 fixed after the brazing material 21 is melted forms the same take-out surface as the take-out surface of the sheets A20 and B30 in the outer portion of the fuel spray orifice plate 100.

  The fuel spray orifice plate 100 is used in a state where the fuel spray device faces the front side, that is, the side where the swirl groove 23 is provided, and the cylinder of the internal combustion engine faces the back side.

Here, since the total concave volume of the swirl groove 23 is related to the amount of sprayed fuel, the optimal concave volume is determined according to the volume of the target cylinder. In addition, the “shape of the dent that can be taken” by the swirl groove 23 becomes “plane area”,
Plane area x depth = volume. When the volume is determined as an optimum value in terms of design, the depth is a shallow groove if the plane area is large, and a deep groove if the plane area is small. However, a certain amount of volume is required for the function groove for adjusting the fluid movement such as swirling the fuel fluid, and the thickness t1 of the sheet A20 is about 0.15 mm as the minimum value and about 2 mm as the maximum value. It is.

  The thickness t2 of the sheet B30 is related to the length of the spray holes 36. If the length of the spray hole 36 becomes longer, even if a special convection is generated in the swirl groove 23, it becomes “mere liquid passing through the hole” while passing through the hole. At t2, the thinner the better. However, if the thickness is too small, there is a problem that the film is deformed by the liquid pressure itself. Therefore, a thickness that can maintain appropriate strength is required. The thickness t2 of the sheet B30 is about 0.1 mm as a minimum value, and is about 0.5 mm as a maximum value in consideration of long-term durability.

  As described above, in consideration of the adjustment of the fluid movement by the swirl groove 23 and the fluid spray function of the spray holes 36, the thickness t2 of the sheet B30 as the second sheet is equal to the thickness t1 of the sheet A20 as the first sheet. It is preferable that the thickness be smaller than that. For example, when 0.15 mm is selected as the thickness t1 of the sheet A20, about 0.1 mm is selected as the thickness t2 of the sheet B30. Further, for example, when the thickness t1 of the sheet A20 is selected to be about 2 mm, the thickness t2 of the sheet B30 is selected to be about 0.5 mm.

  In the present embodiment, the fuel spray orifice plate 100 for spraying fuel such as gasoline or light oil has been described as an example. However, spraying is not limited to fuel, and it is not limited to fuel. Can also.

  Further, in the present embodiment, the brazing material 21 formed on one surface of the sheet A20 is not formed on the sheet B30. When the brazing material 21 is formed on the sheet B30, the joining side of the sheet B30 with the sheet A20 forms the bottom surface of the swirl groove 23, so that the brazing material 21 remains at that location, which causes a problem when adjusting fluid movement. It is possible that

Reference Signs List 20: Sheet A, 21: Brazing material, 22: Reference hole, 23: Swirl groove, 24: Groove, 25: Connection, 28: Separation area, 29: Non-effective area, 30: Sheet B, 32: Hole, 34 ... Groove, 35 ... Connecting part, 36 ... Spray hole, 38 ... Separation area, 50 ... Joint part, 77 ... Effective area, 78 ... Separation area, 100 ... Fuel spray orifice plate, 101 ... Cut face, 210 ... Brazing material processing Step 220: Preparatory step 230: Punching step 240: Stacking step 250: Joining step 260: Spray hole forming step 270: Punching step 280: Take-out step

Claims (14)

A first sheet obtaining step of obtaining a first sheet having a brazing material formed on one side;
A second sheet acquisition step of acquiring a second sheet contacting the one side of the first sheet;
A function groove forming step of forming a function groove for adjusting fluid movement on the first sheet;
Forming at least one of the first sheet and the second sheet at a distance between an effective area and a non-effective area;
A joining step of joining the first sheet and the second sheet with the brazing material,
A spray hole forming step of forming a spray hole for spraying a fluid on the second sheet;
Removing the fluid spray plate from the joined first sheet and the second sheet,
The effective area includes an outer shape of the fluid spray plate determined by an inner edge of the distance area and removed in the removing step, and a separation area surrounding the outer shape,
The said joining process joins the said effective area, The manufacturing method of the fluid spray plate characterized by the above-mentioned.   The joining step joins the first sheet and the second sheet by pressing the tip so that the outer edge of the tip of the joining head is located in a region between the inner edge and the outer edge of the distance region. The method for manufacturing a fluid spray plate according to claim 1, wherein:   The distance region forming step includes forming the distance region by including a groove provided along an outer end of the effective region and a connection portion connecting the effective region and the non-effective region. The method for producing a fluid spray plate according to claim 1 or 2, wherein:   The step of forming a distance region includes forming a distance region between the first sheet and the second sheet, the position of the connection portion formed on the first sheet, and the connection portion formed on the second sheet. 4. The method for manufacturing a fluid spray plate according to claim 3, wherein the position is shifted when the first sheet and the second sheet are overlapped when they are joined. A reference hole forming step of forming a reference hole serving as a position reference for processing on the first sheet;
A hole forming step of forming a hole in the second sheet that does not block the reference hole when the first sheet and the second sheet are overlapped when they are joined,
The method for manufacturing a fluid spray plate according to any one of claims 1 to 4, further comprising:   6. The method according to claim 5, wherein the reference hole formed in the reference hole forming step has a smaller outer shape than the hole formed in the hole forming step. The functional groove forming step forms the functional groove based on the reference hole formed in the first sheet,
7. The fluid spray plate according to claim 5, wherein, in the spray hole forming step, the spray holes are formed in the second sheet based on the reference holes formed in the first sheet. Production method. A method for manufacturing a fluid spray plate, comprising:
A first sheet obtaining step of obtaining a first sheet having a brazing material formed on one side;
A second sheet acquisition step of acquiring a second sheet contacting the one side of the first sheet;
A function groove forming step of forming a function groove for adjusting fluid movement on the first sheet;
A groove forming step of forming, on at least one of the first sheet and the second sheet, a groove having an inner edge outside the take-out area forming the outer shape of the fluid spray plate;
A joining step of joining the first sheet and the second sheet with the brazing material,
After the joining step, a spray hole forming step of forming a spray hole for spraying a fluid in the second sheet;
Removing the fluid spray plate from the joined first sheet and the second sheet;
A method for producing a fluid spray plate having: The joining step is to join the first sheet and the second sheet, which are overlapped via the brazing material, by pressing a tip end of a joining head,
In the groove forming step, the outer edge of the front end of the joining head pressed against the first sheet and the second sheet in the joining step can be located between the inner edge of the groove and the outer edge of the groove. The method according to claim 8, wherein the groove is formed.   The method for manufacturing a fluid spray plate according to claim 8 or 9, wherein the removing step takes out the fluid spray plate inside the groove formed in the groove forming step.   The groove forming step includes forming a connection portion on the first sheet and the second sheet, the connection portion connecting an inner edge side of the groove and an outer edge side of the groove, and forming a connection portion of the connection portion formed on the first sheet. The position and the position of the connection portion formed on the second sheet are formed so that the position is shifted when the first sheet and the second sheet are overlapped when they are joined. A method for manufacturing a fluid spray plate according to any one of claims 8 to 10. A first sheet having a function groove for adjusting the fluid movement of the fuel fluid, and having a predetermined thickness as a preferable one for adjusting the fluid movement;
A second sheet having a spray hole for spraying a fuel fluid whose fluid movement has been adjusted by the functional groove of the first sheet;
A joint for joining the first sheet and the second sheet;
A fluid spray plate comprising:   The fluid spray plate according to claim 12, wherein a thickness of the second sheet is smaller than a thickness of the first sheet.   The joint portion is formed of a brazing material that is fixed after being melted, and forms the same take-out surface as the take-out surface of the first sheet and the second sheet at the outer portion of the fluid spray plate. Item 14. The fluid spray plate according to Item 12 or 13.