KR102660378B1 - Method of manufacturing surface mount nut, manufacturing apparatus of the surface mount nut, method of manufacturing bottomed cylindrical body, and the surface mount nut - Google Patents

Abstract

A method of manufacturing a surface-mount nut is provided that makes it easy to increase the dimensional accuracy of the hole while reducing the number of steps even when providing a relatively deep hole. A manufacturing method for manufacturing a surface-mounted nut in the shape of a user cylinder, which has a screw hole opening upward and whose bottom part can be soldered to the mounting surface, from a metal material, wherein a die with a hole portion is placed on the lower side and a punch is punched from above into the metal material. A hole forming step of driving in, causing a part of the pressed down portion to protrude from the lower surface of the metal material into the inside of the hole portion, and forming a hole in the metal material with the upper surface of the pressed down portion as the bottom, and forming the formed hole with the screw. It is a manufacturing method that includes a screw hole processing process that is machined into a hole.

Description

Method of manufacturing surface mount nut, manufacturing apparatus of the surface mount nut, method of manufacturing bottomed cylindrical body, and the manufacturing method of the surface mount nut, and the manufacturing apparatus of the surface mount nut surface mount nut}

The present invention relates to a manufacturing method of a surface mounting nut, a manufacturing apparatus of a surface mounting nut, a manufacturing method of a user cylindrical body, and a surface mounting nut.

Conventionally, surface mounting nuts have been used, for example, for connecting boards to each other. The surface mounting nut is provided with a screw hole, and it is possible to connect the two sides by soldering one connection target (mounting surface) and screwing the other connection target. Patent Document 1 discloses a surface mount nut mounted on a printed wiring board of an electronic device in which a film sheet is attached to the lower surface including the screw hole of the surface mount nut.

Since the bottom of the surface mount nut can be firmly attached to the mounting surface by soldering, the shape of the surface mount nut is a user-shaped nut that can expand the bottom area rather than a cylindrical shape with a hole penetrating to the bottom. ) It is preferable to have a cylindrical shape. This surface mounting nut can be viewed as a type of metal bottom cylindrical body (cylindrical body with a bottom).

Regarding the method of manufacturing a metal user cylindrical body, for example, a method of providing a user hole by deep drawing press processing is mentioned. However, according to deep drawing press processing, when providing a relatively deep hole, many processes are required to gradually deepen the hole. Additionally, deep drawing press processing may cause problems in terms of hole dimensional accuracy.

Patent Document 1: Japanese Patent Publication No. 2007-35992

In view of the above-mentioned problems, the present invention provides a method for manufacturing a surface mount nut, a manufacturing apparatus for a surface mount nut, and a user cylinder that makes it easy to increase the dimensional accuracy of the hole while reducing the number of steps even when providing a relatively deep hole. The purpose is to provide a method for manufacturing an upper body.

The manufacturing method of the surface mounting nut according to the present invention is a manufacturing method of manufacturing a surface mounting nut of a user cylindrical shape having an upwardly opening screw hole and having a bottom portion that can be soldered to the mounting surface, using a die having a hole portion. A punch is driven into the metal material with the die installed on the lower side from above, a part of the pressed down portion is made to protrude from the lower surface of the metal material into the inside of the hole, and a hole is formed with the upper surface of the pressed down portion as the bottom. It is a manufacturing method including a hole forming step in a metal material and a screw hole processing step in which the formed hole is machined into the screw hole. According to this manufacturing method, even when providing a relatively deep hole, it becomes easy to increase the dimensional accuracy of the hole while reducing the number of steps.

More specifically, the manufacturing method may be a manufacturing method in which the outer edge of the hole portion is disposed inside the outer edge of the punch when viewed from above. According to this manufacturing method, it becomes easy to appropriately prepare the bottom portion while using a part of the pressed down portion as the bottom of the hole.

More specifically, the manufacturing method may be a manufacturing method in which the shape when viewed from above the outer edge of the hole portion is polygonal. In addition, the manufacturing method is more specifically a cutting and removal process of cutting and removing the protruding portion of the metal material, and pressing upward on a predetermined area of the lower surface of the metal material including the cut portion when viewed from below. A manufacturing method including a crushing step may be used.

More specifically, the manufacturing method includes a cutting and removal step of cutting and removing the lower portion of the metal material at a position above the lower surface and lower than the upper surface, and using the cut surface as the bottom portion. You can do this. According to this manufacturing method, it becomes easy to appropriately prepare the bottom portion while using a part of the pressed down portion as the bottom of the hole. Additionally, “the cut surface is referred to as the bottom portion” also includes the “cut surface” being subjected to surface treatment such as plating as the “bottom portion.”

Additionally, more specifically, the manufacturing method may be a manufacturing method including the step of C-chamfering the upper end of the side wall of the hole. Additionally, the surface-mounted nut manufacturing apparatus according to the present invention is configured to manufacture the surface-mounted nut by the above-described manufacturing method. According to this configuration, it becomes possible to enjoy the advantages of the manufacturing method according to the present invention.

In addition, the manufacturing method of the user cylindrical body according to the present invention is a manufacturing method of manufacturing the user cylindrical body having an upwardly opening hole from a metal material, wherein a punch is driven from above into the metal material with a die having a hole set on the lower side. A hole forming step of inserting a part of the pressed down part into the inside of the hole from the lower surface of the metal material, and forming a hole in the metal material with the upper surface of the pressed down part as the bottom, is above the lower surface. The manufacturing method includes a cutting and removal process of cutting and removing the lower part of the metal material at a position lower than the upper surface.

In addition, the manufacturing method of the user cylindrical body according to the present invention is a manufacturing method of manufacturing the user cylindrical body having an upwardly opening hole from a metal material, by driving a punch from above into the metal material with a die having a hole set on the lower side. A hole forming step of protruding a part of the pressed down portion into the inside of the hole from the lower surface of the metal material and forming a hole in the metal material with the upper surface of the pressed down portion as the bottom, when viewed from above, A manufacturing method is used in which the outer edge of the hole portion is disposed inside the outer edge of the punch. According to this manufacturing method, it becomes easy to appropriately prepare the bottom portion while using a part of the pressed down portion as the bottom of the hole.

In addition, the surface mounting nut according to the present invention is a surface mounting nut of a user cylindrical shape having an upwardly opening screw hole and having a bottom part that can be soldered to the mounting surface, and the closing part that closes the lower part of the screw hole is removable. do. According to this configuration, it becomes possible to remove the closing portion as needed and use it in a form that penetrates below the screw hole. Additionally, more specifically, the configuration may be such that the boundary between the closed portion of the bottom portion and a portion other than the closed portion can be visually visible.

According to the manufacturing method of the surface mount nut according to the present invention, it becomes easy to increase the dimensional accuracy of the hole while reducing the number of steps even when providing a relatively deep hole.

1 is a perspective view of a surface-mounted nut 1 manufactured by the manufacturing method of this embodiment.
Figure 2 is an explanatory diagram of an example of a specific form of the surface mounting nut 1.
Figure 3 is a schematic flowchart of the manufacturing method of the surface mount nut 1.
FIG. 4 is an explanatory diagram of the metal plate material 2 used in manufacturing the surface mounting nut 1.
Figure 5 is an explanatory diagram of how the hole forming process (S12) is performed.
Figure 6 is an explanatory diagram of how the hole forming process (S12) is performed.
Figure 7 is an explanatory diagram of each process after the cutting and removal process (S13).
Figure 8 is an explanatory diagram of the cutting and removal process (S13).
Fig. 9 is an explanatory diagram of a modification of the manufacturing method according to the present embodiment.
FIG. 10 is a perspective view of the metal plate material 2 shown in FIG. 9.
FIG. 11 is a perspective view of the metal plate material 2 shown in FIG. 9 as seen from another angle.
Figure 12 is an explanatory diagram regarding the size of the metal plate material.
Figure 13 is an explanatory diagram regarding the size of the metal plate material.
Figure 14 is an explanatory diagram for changing the shape of the through hole of the die.
Figure 15 is an explanatory diagram for changing the shape of the through hole of the die.
Figure 16 is an explanatory diagram for changing the shape of the through hole of the die.
Figure 17 is an explanatory diagram of a surface mounting nut having a protruding portion from the bottom portion.
Figure 18 is an explanatory diagram of a surface-mounted nut that has undergone a crush process.

The manufacturing method of a surface mounting nut (reflow nut) according to an embodiment of the present invention will be described below using each drawing. In addition, the vertical direction of the surface mounting nut coincides with the axial direction of the screw hole, and the side where the screw hole opens (the side where the screw is inserted) is taken as the upper side.

Fig. 1 is a perspective view of a surface-mounted nut 1 manufactured by the manufacturing method of this embodiment. The surface mounting nut 1 is a metal rectangular parallelepiped with up, down, left, right, and front and back sides, and is provided with a screw hole 11 opening upward, so that the bottom portion 15 can be soldered to the mounting surface. It is a one-user cylindrical part. The central axis of the screw hole 11 extends in the vertical direction past the central position of the surface mounting nut 1 when viewed from above. Additionally, the upper end of the side wall of the screw hole 11 is a portion (C-chamfered portion 12) on which C-chamfering processing of about C0.15 has been performed.

An example of a method of using the surface mounting nut 1 is connecting a connection board provided with a through hole to a mounting board. In this case, the bottom portion 15 of the surface mounting nut 1 is first fixed to the upper surface (mounting surface) of the mounting substrate by soldering. Thereafter, the connection board is set on the upper surface portion 16 so that the through hole is located on the screw hole 11. In this setting state, a screw is inserted into the screw hole 11 from the connection board and the screw is tightened. Thereby, the connection board is fixed to the upper surface portion 16 of the surface mounting nut 1 by screwing.

Here, paying attention to the fastening of the mounting board and the surface mounting nut 1, since the fastening is realized by soldering, there is no need to provide, for example, a hole in the mounting board for screwing the surface mounting nut 1. . Therefore, there are no restrictions on mounting components on the mounting board to provide the hole, and the degree of freedom in product design is improved.

Additionally, in the surface mount nut 1, the screw hole 11 does not penetrate to the bottom portion 15, and the area of the bottom portion 15 is expanded accordingly. Therefore, compared to the case where it is assumed that the screw hole 11 penetrates all the way to the bottom portion 15, the area soldered to the mounting surface becomes larger, and the peeling strength (difficulty of peeling) of the solder improves. Furthermore, even when soldering is performed by applying cream solder to the bottom portion 15, since the screw hole 11 does not penetrate to the bottom portion 15, the cream solder enters the screw hole 11 from the bottom. is suppressed. Additionally, since the screw hole 11 does not penetrate to the bottom portion 15, it is easy to lift the surface mount nut 1 from the upper side by vacuum suction, and workability such as transport is excellent.

Additionally, by increasing the contact area between the surface mounting nut 1 and the mounting substrate, it is possible to reduce the electrical resistance between them and improve the heat dissipation characteristics. When these parts are installed in communication devices such as smartphones, it is possible to improve grounding performance by reducing electrical resistance as much as possible, and it is also effective in reducing noise in the high frequency band. Additionally, since the lower side of the screw hole 11 is closed, it is avoided that the screw inserted into the screw hole 11 accidentally touches and damages the mounting board.

FIG. 2 shows a front view, a top view, and an X-X sectional view (a view of the As shown in this cross-sectional view, the lower side of the screw hole 11 is closed by the closure portion 13.

In the example shown in FIG. 2, the vertical size S1 of the entire surface mounting nut 1 is about 1.5 mm, the left-right S size S2 is about 2 mm, and the front-back direction size S3 is about 1.2 mm. Additionally, the depth S4 of the screw hole 11 is approximately 1.3 mm, and the thickness S5 of the closed portion 13 forming the bottom of the screw hole 11 is approximately 0.2 mm. Additionally, the screw hole 11 is formed to a size of M0.8. The specific shape or size of the single-side mounting nut 1 is not particularly limited.

Next, the manufacturing method of the surface mounting nut 1 will be described. In addition, description of surface treatment, including plating treatment, etc. is omitted here.

Figure 3 is a schematic flowchart of the manufacturing method of the surface mount nut 1. The manufacturing method shown in FIG. 3 is a manufacturing method for manufacturing the surface mounting nut 1 from a metal material, and includes a setting process (S11), a hole forming process (S12), a cutting and removal process (S13), a C chamfering process (S14), This is a method in which the screw hole processing process (S15) and the finishing process (S16) are sequentially performed. It is also possible to change part of the manufacturing method to the extent that it does not interfere with the manufacturing of the single-sided mounting nut 1.

The setting process (S11) is a process of setting the metal plate material 2 shown in FIG. 4 in a manufacturing apparatus (hereinafter sometimes referred to as manufacturing apparatus J) of the surface mount nut 1. In addition, for ease of understanding, the lightly colored portion of the metal plate material 2 shown in FIG. 4 and later represents a portion of the metal material 21 that serves as the base of the surface mounting nut 1. On the lower side of the metal material 21 of the metal plate material 2, a hole 22 is provided for setting a die Ja, which will be described later. The metal plate material 2 is formed so that parts of the same shape including the metal material 21 and the holes 22 are aligned in the left and right directions.

In the manufacturing device J, in the example of this embodiment, each area configured to perform one or more processes is arranged in order, and the parts of the sheet metal material 2 on which the process was performed in any area are transferred to the next process. By sending it to the area, each series of steps after the hole forming step (S12) is automatically executed.

In the hole forming step (S12), a punch is driven from above into the metal material 21 with a die having a hole portion installed on the lower side, and the pressed down portion (hereinafter sometimes referred to as the “pressing portion”) is formed. This is a process of forming a hole in the metal material 21 with a portion protruding from the lower surface and having the upper surface of the depressed portion as the bottom.

Figure 5 schematically shows how the hole forming process (S12) is performed. Figure 5 shows the process progressing sequentially from the upper side, and shows, in order from the left, a side view, a front view, and a cross-sectional view (a cross-sectional view when the metal plate-shaped material 2 is cut into a plane that divides the front and back into two planes). As shown in this figure, the manufacturing device J includes a die Ja consisting of a first die part Ja1 and a second die part Ja2, a first stripper part Jb1 and a second stripper part Jb2. ), and a punch (Jc) are provided. FIG. 6 schematically shows the state in which the 2nd die part Ja2 and the 2nd stripper part Jb2 were moved forward from the state of FIG. 5(c).

First, as shown in Fig. 5(a), the die Ja, stripper Jb, and punch Jc of the manufacturing device J are set on the metal plate material 2. The die Ja is such that the first die part Ja1 moves backward and the second die part Ja2 moves forward, and they contact within the hole 22 and are in close contact with the lower side of the metal material 21. It is set. The stripper Jb is set so that the first stripper part Jb1 moves backward and the second stripper part Jb2 moves forward, and they contact on the upper side of the metal material 21.

In addition, the punch Jc is formed in a cylindrical shape, and in the set die Ja, a through hole Jah (corresponding to the hole portion of the present invention) with a circular cross section and a diameter dimension substantially equal to that of the punch Jc is formed. In the set stripper Jb, a through-hole Jbh having a circular cross-section and a diameter dimension substantially equal to that of the punch Jc is formed. The punch Jc and the through holes Jah and Jbh have the same central axis, and this central axis passes through the center of the metal material 21 when viewed from above.

In this state, as shown by the dotted arrow in Fig. 5(a), the manufacturing device J drives the punch Jc downward through the through hole Jbh. As a result, as shown in Fig. 5(b), the lower portion of the punch Jc in the metal material 21 is pushed out through the through hole Jah. In addition, the driving of the punch Jc remains at a position above the lower surface of the metal material 21, and the lower part of the punch Jc (pressing portion 21a) in the metal material 21 is It is in a depressed state compared to other parts of the body.

After that, as shown by the dotted arrow in Figure 5(b), the manufacturing device J moves the punch Jc upward and returns it to its original position as shown in Figure 5(c). Additionally, a hole 21b is formed in the metal material 21 by pushing out the pressing portion 21a. Also, after that, as shown in (d) of FIG. 5, the settings of the die Ja, stripper Jb, and punch Jc are released. In this way, the parts of the metal plate material 2 on which the hole forming process (S12) has been performed are subjected to subsequent processes again in order. This will be described in more detail with reference to FIG. 7 and the like. Moreover, Fig. 7 shows, in order from the top, a top view, a front view, and a cross-sectional view (a cross-sectional view when the metal plate-shaped material 2 is cut into two planes divided into front and back).

Figure 7(a) shows a part of the metal plate material 2 on which the hole forming step (S12) has been completed. In the cutting and removal process S13, the manufacturing device J cuts and removes the dotted line border β portion of the metal plate material 2 by shearing using a cutter moving in the front and rear direction. Here, the position of the upper edge of the dotted line border β is above the lower surface of the metal material 21 and lower than the lower surface of the pressing portion 21a. That is, the cutting and removal process (S13) is performed on the metal material 21 (including the pressure reduction part 21a and other parts) at a position above the lower surface of the metal material 21 and below the upper surface of the pressure reduction part 21a. It is a process of cutting and removing the lower part of the. As a result, a part of the pressure reduction portion 21a can be used as the bottom of the hole 21b (closed portion 13), and the lower surface of the metal material 21 is flattened to form a lower surface of the surface mounting nut 1. It is possible to form part 15.

Also, assuming that the cutting and removal process (S13) is performed by a general method, instead of cutting and removing the portion of the dotted line frame β shown in FIG. 7, only the excess reduction portion 21a is removed, for example, in FIG. 8. The dotted border (β') shown in is cut and removed. However, if this is done, there is a risk that it will become difficult to properly provide the closure portion 13 corresponding to the bottom portion of the hole 21b.

In other words, if only the excess reduction portion 21a is cut and removed, a step, etc. will be created between the cut surface caused by this cutting and the lower surface of the metal material 21 (excluding the cut surface), causing the surface mounting nut 1 to be damaged. There is a risk that the bottom portion 15 (the surface used for soldering) may not be flat and soldering of the surface mount nut 1 may not be performed properly. In this regard, in the present embodiment, since the entire lower part of the metal material 21 including the extra reduction portion 21a is cut and removed at once, the entire lower surface of the metal material 21 is flattened to form a flat bottom portion. It is easy to obtain (15).

In addition, as in the present embodiment, when the bottom of the hole 21b is thinned in order to sufficiently secure the depth of the hole 21b, for example, if only the excess reduction portion 21a is cut and removed, It is necessary to very shorten the portion of the upper push-down portion 21a (the portion that is not removed and remains as the closure portion 13). Therefore, when performing the cutting and removal process (S13), there is a risk that this part may unintentionally fall off from the metal material 21 due to an impact during cutting or the like. In this regard, in this embodiment, the portion of the lowering portion 21a above the lower surface of the metal material 21 can be relatively longer, and to that extent, this portion is intended to be used when performing the cutting and removal process (S13). Avoiding being eliminated unexpectedly.

Additionally, in the C chamfering step (S14), the manufacturing device J performs C chamfering on the upper end of the side wall of the hole 21b. Figure 7(b) shows a part of the metal plate material 2 on which the cutting and removal process (S13) and the C chamfering process (S14) have been completed.

In the screw hole processing step S15, the manufacturing device J processes the hole 21b into a screw hole by performing tapping processing with a tool schematically indicated by a dotted line γ in FIG. 7 . Thereby, the screw hole 11 of the surface mounting nut 1 can be obtained. Additionally, in the example of this embodiment, tapping of M0.8 is performed on the hole 21b with a diameter of 0.7 mm. Figure 7(c) shows a part of the metal plate material 2 on which the screw hole processing step (S15) was performed. In the finishing step S16, the manufacturing device J cuts the metal plate material 2 at the position indicated by the dotted line δ in FIG. 7 . In this way, the surface mounting nut 1 based on the metal material 21 can be obtained.

In addition, as a method of manufacturing the surface mounting nut 1 from the metal plate material 2, each process having the same effect as the above-described processes (S11 to S16) is performed, but the direction in which the punch is driven is shifted by 90°. Any manufacturing method may be employed. Figure 9 shows the appearance of the metal plate material 2 when this method is adopted. In addition, Figure 9(a) shows a part of the metal plate material 2 on which the hole forming process (S12) has been completed, and Figure 9(b) shows the cutting and removal process (S13) and the C chamfering process (S14). This part of the metal plate material 2 on which the implementation has been completed is shown, and Figure 9 (c) shows a part of the metal plate material 2 on which the screw hole processing step (S15) has been implemented. Moreover, FIG. 10 shows a perspective view of the metal plate material 2 shown in FIG. 9, and FIG. 11 shows a perspective view of the metal plate material 2 seen from another angle. In this way, in this manufacturing method, the thickness direction of the metal plate material 2 is vertical (axial direction of the screw hole 11).

In addition, in this manufacturing method, in the hole forming step (S12), a punch is driven into the sheet metal material 2 in the thickness direction. In addition, in the cutting and removal process (S13), the portion of the dotted line border β shown in FIG. 9 in the metal plate material 2 is cut and removed. Moreover, the position of the upper edge of the dotted line border β is above the lower surface of the metal material 21 and lower than the upper surface of the pressing portion 21a.

As explained above, the manufacturing method of the surface mounting nut 1 according to the present embodiment is a user cylindrical surface having an upwardly opening screw hole 11 and allowing the bottom portion 15 to be soldered to the mounting surface. This is a manufacturing method in which the mounting nut (1) is manufactured from a metal material (21). In addition, this manufacturing method includes a hole forming step (S12) (a punch Jc is driven into the metal material 21 from above to protrude a part of the pressure reduction portion 21a from the lower surface of the metal material 21, and the pressure reduction portion 21a is a process of forming a hole 21b with the upper surface as the bottom) in the metal material 21, and a cutting and removal process (S13) (at a position above the lower surface of the metal material 21 and lower than the upper surface of the pressure lowering portion 21a). , a step of cutting and removing the lower part of the metal material 21), and a screw hole processing step (S15) (a step of processing the hole 21b into the screw hole 11), and the cut surface is formed on the bottom surface. This is the manufacturing method as part (15).

Therefore, it is easy to appropriately provide the bottom portion while using a part of the pressure lower portion 21a as the bottom of the screw hole 11. In addition, when deep drawing press processing is used as a method of forming a user cylindrical body with a hole of the same depth as the surface mounting nut 1, approximately 4 to 5 processes are required to gradually deepen the hole, but in this embodiment According to the manufacturing method of the shape, it can be formed in two processes, a hole forming process and a cutting and removal process, and manufacturing efficiency is excellent.

In addition, when forming a hole by the hole forming process (S12) of this embodiment, the dimensional accuracy of the hole can be further increased compared to the case of forming the hole by deep drawing press processing, and the formation of the screw hole by tapping processing. It is also possible to do this more stably. In this way, according to the manufacturing method of this embodiment, it is easy to increase the dimensional accuracy of the hole while reducing the number of steps even when providing a relatively deep hole. Additionally, when forming a hole by the hole forming step (S12), it is easier to reduce the size of the metal plate material to be processed compared to when forming a hole by deep drawing press processing.

Additionally, if a hole is formed by cutting, burrs due to cutting are generated on the inner wall of the hole. If the surface mounting nut 1 is placed on the mounting board with this burr remaining, the burr may fall off and adhere to the board mounting product, causing a risk of trouble such as a short circuit in the electric circuit. However, it is not easy to reliably remove such burrs, especially when the hole size is small. In this regard, according to the hole forming process (S12) of the present embodiment, since the hole can be formed without generating burrs due to cutting, it is possible to avoid problems caused by the burrs.

Here, the metal plate material (X) in the case of manufacturing the surface mounting nut The metal plate material 2 (in the case of manufacturing the surface mounting nut 1 by forming a hole in ) is illustrated in FIG. 12(b). Figure 13(a) shows a perspective view of the metal plate material (X), and Figure 13(b) shows a perspective view of the metal plate material 2. In the example of FIG. 12, the pitch (spacing between surface mounting nuts adjacent to each other in the horizontal direction) (P1) to the metal plate material (X) and the pitch (P2) to the metal plate material (2) are both 9 mm. . However, the vertical size L1 of the metal plate material X is 16 mm, while the vertical size L2 of the metal plate material 2 is 7.5 mm. In this way, the metal plate material 2 of the present embodiment is smaller than the metal plate material

In addition, the hole forming process (S12) is performed with the die Ja installed on the lower surface of the metal material 21, and the punch Jc is placed at a position that overlaps the punch Jc when viewed from above on the die Ja. ) and a hole (Jah) of almost equal size in the radial direction is provided. Therefore, the shape and size of the reduction portion 21a, which is pushed downward by driving the punch Jc, can be regulated by the hole Jah, making it possible to perform the hole forming step S12 stably. .

Additionally, it is possible to change the shape of the through hole Jah of the die Ja used in the hole forming process S12 in various ways. Hereinafter, this point will be explained in more detail.

Figure 14 shows the shape and dimensions of the through hole Jah when viewed from above, set to be equal to the shape and dimensions of the punch Jc when viewed from above, and manufactured through the above-described processes (S11 to S16). The shape of the surface mounting nut (1) is illustrated. In Figure 14 (same as Figures 15 and 16, described later), (a) an exterior perspective view viewed obliquely above, (b) an exterior perspective view viewed obliquely below, (c) a top view, (d) a front view, and (e) a bottom view. Figures, (f) side view, and (g) X-X cross section (X-X cross section shown in side view) are shown.

On the other hand, in Figure 15, the radial dimension when viewed from above the through hole Jah is set smaller than the radial dimension when viewed from above the punch Jc, and the radial dimension when viewed from above the punch Jc is set to be smaller than the radial dimension when viewed from above the through hole Jah, and the The shape of the surface mount nut (1) being manufactured is illustrated. At the bottom of Figure 15, (g) an enlarged view within the dotted line in the cross-sectional view X-X is shown. In addition, the shapes of the through hole Jah and the punch Jc when viewed from above are all circular and the same, and the center positions of the through hole Jah and the punch Jc overlap when viewed from above. When viewed from above, the outer edge of the through hole Jah is disposed inside the outer edge of the punch Jc. The area when viewed from above the through hole Jah is smaller than the area when viewed from above the punch Jc.

In addition, here, as the cutting and removal process (S13), a process of cutting and removing only the portion of the reduction portion 21a protruding downward from the lower surface of the metal material 21 is adopted. That is, the surface mount nut 1 shown in FIG. 15 has a punch Jc driven in to the position indicated by Y1 in the hole forming step (S12), and the pressure reduction portion ( Only 21a) has been cut and removed.

In the surface mount nut 1 shown in FIG. 15 as well, the upper part of the reduction portion 21a that remains without being cut and removed is used as the closing portion 13, and the lower side of the screw hole 11 is closed by the closing portion 13. This is closed. As described above, by making the through hole Jah have a smaller diameter than the punch Jc, in the hole forming step S12, the reduction portion 21a extends from slightly above the opening of the through hole Jah to the opening. It gradually becomes depressed. Therefore, as shown in FIG. 15, a taper TP is formed on the outer periphery of the closure portion 13 when viewed in cross section, and the diameter is enlarged on the upper side, so that the lower portion of the closure portion 13 Elimination is avoided.

In this way, the outer edge of the through hole Jah is disposed inside the outer edge of the punch Jc when viewed from above, so that the closed portion 13 does not fall off even if the thickness Ya of the closed portion 13 is sufficiently thin. This makes it easy to appropriately prepare the bottom of the screw hole 11 while making it sufficiently thin. In addition, even if only the portion of the reduction portion 21a protruding from the lower surface of the metal material 21 is cut and removed in the cutting and removal step S13, it is possible to properly prepare the closing portion 13 without falling off. Additionally, the outer shape of the through hole Jah when viewed from above can be other than circular.

Figure 16 shows the shape of the surface mounting nut 1 manufactured by each of the above-described processes (S11 to S16) with a square (an example of a polygon) shape when viewed from above the outer edge of the through hole Jah. is exemplified. Additionally, the shape of the punch Jc when viewed from above is circular, and the center positions of the through hole Jah and the punch Jc overlap when viewed from above. Additionally, the length of the diagonal of the square is shorter than the diameter of the circle, and when viewed from above, the outer edge of the through hole Jah is disposed inside the outer edge of the punch Jc. In addition, here, as the cutting and removal process (S13), a process of cutting and removing only the portion of the reduction portion 21a protruding downward from the lower surface of the metal material 21 is adopted.

In the surface mount nut 1 shown in FIG. 16, as in the example shown in FIG. 15, a taper TP is formed on the outer peripheral part of the closing portion 13 when viewed in cross section, and the diameter is enlarged at the upper side. Falling off downward of the closure portion 13 is avoided. Additionally, by making the through hole Jah square when viewed from above, the lower portion 21a protruding from the lower surface of the metal material 21 also becomes square when viewed from above. Therefore, when cutting and removing the protruding lower portion 21a, it becomes possible to cut more smoothly by holding the cutter perpendicular to the plane corresponding to one side of the square when viewed from above. Also, even when the reduction portion 21a protruding from the lower surface of the metal material 21 is made into another polygon such as a rectangle or triangle, the same effect can be obtained by touching the cutter perpendicularly to the plane corresponding to one side of the polygon. possible.

In addition, when a process of cutting and removing only the portion of the lower portion 21a protruding downward from the lower surface of the metal material 21 is adopted as the cutting and removal step (S13), due to problems such as processing accuracy, the cut portion is There may be cases where it protrudes from the lower surface of the metal material 21 (corresponding to the bottom portion 15). FIG. 17 illustrates a surface mount nut having a portion (Z) protruding from the bottom portion 15. Moreover, in Figure 17 (the same as Figure 18, described later), an external perspective view seen from an oblique downward direction is shown on the left, and a cross-sectional view (a view from the same viewpoint as Figure 15(g)) is shown on the right.

If such protrusions remain, an inclination may occur when the surface mount nut is placed on the mounting surface, which may adversely affect soldering of the surface mount nut to the mounting surface. Therefore, after performing the cutting and removal process (S13), a process (crushing process) is performed to crush a predetermined area of the lower surface of the metal material 21 including the cut portion slightly upward when viewed from below. do. Additionally, Fig. 18 illustrates a surface-mounted nut (a surface-mounted nut with a slightly crushed area 15a) that has been subjected to a crushing process. By this crushing process, it becomes possible to eliminate the downward protrusion from the bottom portion 15 and perform satisfactory soldering to the mounting surface of the surface mounting nut.

Additionally, the surface-mounted nut 1 manufactured by the manufacturing method of this embodiment can be used in various forms, such as a form in which boards are connected to each other. For example, when using the surface mounting nut (1) as a component of a smartphone, it can be used to connect the cover to prevent lifting of the B to B connector to the mounting board, or to connect the LDS antenna to the mounting board. You may use it.

In addition, the surface mounting nut 1 manufactured by the manufacturing method of this embodiment is a user cylindrical surface mounting nut having a screw hole 11 opened upward and allowing the bottom portion 15 to be soldered to the mounting surface. As such, the closing portion 13 that closes the lower portion of the screw hole 11 is configured to be removable.

That is, as described above, the closed portion 13 is formed by moving a portion of the metal material 21 downward by driving the punch Jc. Therefore, although the outer periphery of the closing portion 13 is in close contact with the surrounding portion of the surface mounting nut 1, the metal structure is discontinuous (parted state) at the boundary between the outer peripheral portion of the closing portion 13 and its surroundings. (including), the bond between the outer periphery of the closure portion 13 and its surroundings is weakened.

As a result, the surface mounting nut 1 prevents the closing portion 13 from falling off unintentionally, but it is relatively easy to close the closing portion 13 by applying a certain amount of upward or downward force to the closing portion 13. It is possible to remove it easily. Additionally, as shown in FIG. 15, when a taper TP is formed on the outer periphery of the closure portion 13, the closure portion 13 can be removed by applying an upward force to the closure portion 13. do.

In addition, since the metal structure is discontinuous (including a divided state) at the boundary between the outer periphery of the closure portion 13 and its surroundings, even if the bottom portion 15 is formed in a planar shape, the bottom portion 15 The boundary between the closed portion 13 and parts other than the closed portion 13 is visible because it appears as a shape. For example, in the examples shown in FIGS. 14, 15, and 18, the boundary of the bottom portion 15 appears as a circle and is visible, and in the example shown in FIG. 16, the bottom portion 15 ), the boundary appears as a square shape and is visible. Therefore, the area of the closure portion 13 in the bottom portion 15 can be easily recognized, and the type of hole that will be made in the bottom portion 15 when the closure portion 13 is removed can be accurately recognized in advance. It is also easy to do. Also, even in the case where the surface mounting nut (1) is used without removing the closure portion (13), the boundary between the closure portion (13) and parts other than the closure portion (13) in the bottom portion (15) becomes visible. This is convenient because the position of the screw hole 11 can be easily recognized when the surface mounting nut 1 is viewed from below.

As described above, since the surface mount nut 1 is provided with a removable closing portion 13, it can be used in a form having the closing portion 13 (a form without the screw hole 11 penetrating), It is also possible to remove the closing portion 13 as necessary and use it in a form that penetrates below the screw hole 11. For example, when the bottom portion 15 of the surface mounting nut 1 is fixed to the mounting board and the screw inserted from above into the screw hole 11 touches the mounting board, the surface mounting nut 1 The closing part (13) of (1) can be removed in advance.

In addition to the above-described embodiments, various changes can be made to the configuration of the present invention without departing from the main scope of the invention. That is, the above embodiment should be considered as an example in all respects and not restrictive. The technical scope of the present invention is indicated by the scope of the claims, not the description of the above-mentioned embodiments, and should be understood to include all changes within the meaning and scope equivalent to the scope of the claims. In addition, the manufacturing method of the surface-mounted nut according to the present invention can be viewed as one form of the manufacturing method of the user cylindrical body according to the present invention, and the main technical features are common.

1 Face mount nut
11 screw hole
12 C chamfer
13 closure
15 bottom part
16 upper surface
2 Metal plate material
21 Metal material
21a lower part
21b hole
Ja die
Ja1 1st Daibu
Ja2 2nd Daibu
Jb stripper
Jb1 1st stripper section
Jb2 2nd stripper section
jc punch

Claims (12)

A manufacturing method for manufacturing a bottom cylindrical surface mounting nut having an upwardly opening screw hole and allowing the bottom portion to be soldered to the mounting surface, using a metal material, comprising:
A punch is driven from above into the metal material with a die having a hole installed on the lower side, a part of the pressed down portion is made to protrude from the lower surface of the metal material into the inside of the hole portion, and a hole is formed with the upper surface of the pressed down portion as the bottom. A hole forming process of forming a hole in the metal material,
A method of manufacturing a surface mount nut, comprising a screw hole machining process of machining the formed hole into the screw hole. In claim 1,
A method of manufacturing a surface mount nut, characterized in that the outer edge of the hole portion is disposed inside the outer edge of the punch when viewed from above. In claim 2,
A method of manufacturing a surface-mount nut, characterized in that the shape of the outer edge of the hole portion when viewed from above is polygonal. In claim 1 or claim 2,
A cutting and removal process of cutting and removing the protruding portion of the metal material;
A method of manufacturing a surface mounting nut, comprising the step of pressing upward and crushing a predetermined area of the lower surface of the metal material including the cut portion when viewed from below. In claim 1 or claim 2,
A cutting and removal process of cutting and removing the lower portion of the metal material at a position above the lower surface and lower than the upper surface,
A method of manufacturing a surface-mount nut, characterized in that the cut surface is used as the bottom portion. In claim 1 or claim 2,
A method of manufacturing a surface-mount nut, comprising the step of performing C-chamfering on the upper end of the side wall of the hole. A manufacturing apparatus for manufacturing a flat cylindrical surface mounting nut having an upwardly opening screw hole and having a bottom portion capable of being soldered to a mounting surface by the manufacturing method according to any one of claims 1 to 3, comprising:
A die installed on the lower side of the metal material and having a hole portion;
A punch driven into the metal material from above, wherein a part of the metal part pushed down by driving in the punch protrudes from the lower surface of the metal material into the inside of the hole, so that the upper surface of the pressed part is the bottom. a punch for forming a hole in the metal material; and
A surface mount nut manufacturing device comprising at least a screw hole processing tool for processing the formed hole into the screw hole. A manufacturing method for manufacturing a user cylindrical body with an upwardly opening hole from a metal material, comprising:
A punch is driven from above into the metal material with a die having a hole set on the lower side, a part of the pressed down portion is made to protrude from the lower surface of the metal material into the inside of the hole portion, and a hole is formed with the upper surface of the pressed down portion as the bottom. Including a hole forming process in the metal material,
A method of manufacturing a user cylindrical body, comprising a cutting and removal step of cutting and removing the lower part of the metal material at a position above the lower surface and lower than the upper surface. A manufacturing method for manufacturing a user cylindrical body with an upwardly opening hole made of metal, comprising:
A punch is driven from above into the metal material on which a die having a hole is set on the lower side, a part of the pressed down portion is made to protrude from the lower surface of the metal material into the inside of the hole, and a hole is formed with the upper surface of the pressed down portion as the bottom. Including a hole forming process in the metal material,
A method of manufacturing a user-shaped cylindrical body, characterized in that the outer edge of the hole portion is disposed inside the outer edge of the punch when viewed from above. A user cylindrical surface mounting nut having an upwardly opening screw hole and allowing the bottom portion to be soldered to the mounting surface,
The closure part that closes the lower part of the screw hole is removable,
A surface-mount nut, wherein the metal structure is discontinuous at the boundary between the outer periphery of the closure portion and its surroundings, thereby weakening the bond between the outer peripheral portion of the closure portion and its surroundings. In claim 10,
A surface-mount nut, wherein a boundary between the closed portion and a portion other than the closed portion in the bottom portion is visible. A manufacturing device for manufacturing a user-cylindrical surface mounting nut having an upwardly opening screw hole and allowing the bottom portion to be soldered to the mounting surface, comprising:
A die installed on the lower side of the metal material and having a hole portion;
A punch driven into the metal material from above, wherein a part of the metal part pushed down by driving in the punch protrudes from the lower surface of the metal material into the inside of the hole, so that the upper surface of the pressed part is the bottom. a punch for forming a hole in the metal material;
A screw hole processing tool for processing the formed hole into the screw hole; and
A surface-mount nut manufacturing device, comprising at least a cutter for cutting and removing at least the protruding portion of the metal material.