JP2018158342A - Method for producing ellipse caulking collar - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing an ellipse caulking collar that has a flange with a uniform thickness, can mold a thin wall part for enlarging a diameter with a uniform thickness, and has an elliptic cross section of which a diameter is enlarged with a predetermined shape.SOLUTION: A method for producing an ellipse caulking collar includes: preparing a cylindrical body (20) with a flange; arranging the cylindrical body with flange between planes (32a) a pair of second dies (32) arranged in a direction perpendicular to the first die between recessed surfaces (31a) of a pair of first dies (31); approaching the pair of first dies (31) so that a distance between the recessed surfaces (31a) of the pair of first dies (31) becomes equal to a length of a major axis of a sleeve of an ellipse caulking collar to be prepared; and pressurizing the sleeve of the cylindrical body with flange in an opposite direction by the planes (32a) of the pair of second dies (32). An ellipse caulking collar (ellipse caulking collar) (10) having a major axis in a first die direction and a minor axis in a second die direction is formed. As needed, a pin (40) is inserted into the ellipse caulking collar, and an inside shape of the ellipse caulking collar is molded.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a method for manufacturing a flanged cylindrical body having an oval cross section. In particular, the present invention relates to a method for manufacturing a caulking collar made of metal having an oval cross section for attachment to an attachment member made of a resin component or the like.

  In general, when an attachment member such as a resin component is fastened to a member to be attached with a bolt or the like, the attachment member may be damaged such as deformation or cracking due to the fastening force in the axial direction of the bolt. In order to prevent such deformation and damage of the mounting member, a metal collar or a metal caulking collar is attached to the through-hole for fastening the mounting member, and the metal collar or the metal caulking collar is used, The mounting member is fastened to the mounted member with a bolt or the like.

  The caulking collar is generally in the form of a flanged cylindrical body in which a flange is formed at one end of a cylindrical sleeve. The end of the caulking collar opposite to the flange is a thin portion that is thin so that it can be easily buckled.

  To attach the caulking collar to the mounting member, insert the caulking collar into the through hole of the mounting member, and then press the caulking collar in the axial direction using a press or a hand-held tool, opposite the flange of the caulking collar. The thin-walled portion on the side is buckled to expand the diameter, and the mounting member is sandwiched between the flange and the expanded-diameter portion where the thin-walled portion is expanded.

The caulking collar generally has a circular cross section, but depending on the shape of the mounting member, it is necessary to use a caulking collar having an oval cross section. For example, it is necessary to adjust the position where the bolt is fastened to the caulking collar in one direction.
However, when a flanged cylindrical body having an elliptical cross section is formed by forging from a round wire, the metal flow differs between the long and short circle portions of the flange, and it is difficult to form the flange uniformly.
Further, in the caulking collar having an oval cross section, the metal flow differs between the semicircular part and the straight part, and it is difficult to extrude the thin part to a uniform thickness and form the thin part to a uniform length. Therefore, when the thin portion is buckled and attached to the attachment member, a buckling abnormality is likely to occur.

Patent Document 1 discloses a metal collar (caulking collar) including a cylindrical sleeve and a circular flange having a larger diameter than the sleeve formed at one end of the sleeve.
Patent Document 1 discloses a metal collar having a circular cross section (caulking collar) and a method for attaching the metal collar (caulking collar), and does not disclose a method for manufacturing an oval caulking collar having a cross section.
Patent Document 2 discloses a method of manufacturing a collar or a color nut having a circular cross section. A cylindrical portion and a base portion are formed separately, and the base portion and the cylindrical portion are integrated by welding to produce a collar or a color nut. Molding of the base part includes the cutting process of the round bar used as the material, the end face correction process, the counterbore forming process, the shaft drawing and drilling process, the preliminary upsetting process for slightly projecting the flange-like protrusions, and the complete protrusion. This is carried out by an upsetting process for making a hole and a punching relief groove forming process for communicating with the hole. In the case of the color nut, there is a screw hole forming process in which a female screw is further cut into the through hole.
In Patent Document 1, a collar or a color nut is manufactured by dividing a collar or a color nut into a base part and a cylindrical part, and forming the collar or the color nut separately and welding and integrating them. Therefore, by arbitrarily changing the length of the cylindrical part It is said that collars or collar nuts having different lengths can be easily manufactured.

However, Patent Document 2 discloses a method for manufacturing a collar or a color nut having a circular cross section, and does not disclose a method for manufacturing a collar or a color nut having an elliptical cross section.
When trying to form a caulking collar having an oval cross section by the manufacturing method of Patent Document 2, the metal flow differs between the oval part and the short circle part of the flange, and it is difficult to form the flange with a uniform thickness. . Also, it is difficult to form a thin part for buckling to have a uniform thickness and uniform length, and buckling abnormalities often occur when forming a diameter-enlarged part by buckling the thin part. .

Patent document 3 discloses the manufacturing method of an elliptical cylindrical member. This method uses a pressing device that has a fixed mold and a movable mold, and in which a molding space surrounded by the molding surface of the movable mold and the molding surface of the fixed mold is formed in an elliptic cylinder shape. In a state where the welded portion of the cylindrical member is pressed toward the movable short shaft portion or the fixed short shaft portion by the core, the cylindrical member is press-molded to form an elliptic cylindrical member.
Patent Document 3 discloses a method of forming an elliptical cylindrical member having an elliptical cylindrical shape, but does not disclose a method of forming an elliptical cylindrical member with a flange.
In the manufacturing method of Patent Document 3, an elliptical cylindrical member with a flange cannot be formed.

Therefore, a manufacturing method capable of forming a flange having a uniform thickness in a long cylindrical member with a flange has been demanded.
In addition, in a caulking collar having an oval cross section, a thin wall portion for buckling can be formed to a uniform thickness and a uniform length, and when it is expanded to be attached to a mounting member, it is seated in a predetermined shape. There has been a demand for a method of manufacturing a crimped collar that bends.

Japanese Unexamined Patent Publication No. 2013-1050 JP 11-197786 A JP 2011-161446 A

Accordingly, an object of the present invention is to provide a method for producing an oval caulking collar having an oblong cross section having a flange having a uniform thickness.
In addition, by providing a method for producing an oval caulking collar having a uniform shape and a thin portion for expanding the diameter, having a uniform thickness and a uniform length, and having a predetermined shape and a cross-section that expands in diameter. is there.

In order to achieve this object, in the present invention, a flanged cylinder is first created. Next, the flanged cylindrical body is disposed between the concave surfaces of the pair of first molds and between the planes of the pair of second molds disposed in a direction perpendicular to the first mold. The sleeve of the flanged cylindrical body is pressed from the opposing direction by the plane of the second mold. Then, an oval caulking collar having a major axis in the direction of the first mold and a minor axis in the direction of the second mold is formed.
If necessary, insert a pin inside the oval caulking collar to mold the inner shape of the oval caulking collar.

A first aspect of the present invention includes a sleeve having an oval cross section, and an oval flange formed at one end of the sleeve and having a diameter larger than that of the sleeve, the cross section penetrating the sleeve and the flange. Is a manufacturing method of an oval caulking collar in which an oval through hole is formed,
a) a sleeve having a circular section and a circular flange formed at one end of the sleeve and having a larger diameter than the sleeve, and a through-hole having a circular section passing through the sleeve and the flange is formed Prepare a cylinder with flange,
b) A pair of first molds having a concave surface for pressing the sleeve of the flanged cylindrical body, and a pair of planes for pressing the sleeve of the flanged cylindrical body from a direction perpendicular to the concave surface. And a second mold of
c) disposing the sleeve of the flanged cylindrical body between the concave surfaces of the pair of first molds and between the planes of the pair of second molds;
d) A pair of the first molds until the distance between the center portions of the pair of concave surfaces of the pair of first molds is equal to the length of the long axis of the sleeve of the oval caulking collar to be created. Move the molds closer together,
e) A pair of second molds until the distance between the pair of planes of the pair of second molds is equal to the length of the short axis of the sleeve of the oval caulking collar to be created. The sleeves are moved so as to approach each other, the sleeve is pressed by a pair of the flat surfaces so that a part of the sleeve enters the pair of concave surfaces of the pair of first molds, and the cross section of the sleeve Make an oval,
f) By deforming the sleeve, the flange is made oval.
This is a method for producing an oval caulking color.

According to the first aspect of the present invention, it is possible to manufacture an oval caulking collar having an oblong shape having a flange with a uniform thickness and having a cross section of an arc and a straight line.
Moreover, the thin part for expanding the diameter can be formed to a uniform length with a uniform thickness. Therefore, since the diameter of the thin portion can be increased in a predetermined shape, the caulking abnormality hardly occurs.

A second aspect of the present invention comprises a sleeve having an oval cross section, and an oval flange formed at one end of the sleeve and having a larger diameter than the sleeve, the cross section penetrating the sleeve and the flange. Is a manufacturing method of an oval caulking collar in which an oval through hole is formed,
a) a sleeve having a circular section and a circular flange formed at one end of the sleeve and having a larger diameter than the sleeve, and a through-hole having a circular section passing through the sleeve and the flange is formed Prepare a cylinder with flange,
b) a pair of first molds having a concave surface for pressing the sleeve of the flanged cylinder and a second concave surface for pressing the flange; and the sleeve of the flanged cylinder. Preparing a pair of second molds having a plane for pressing from the direction perpendicular to the concave surface and a second plane for pressing the flange;
c) disposing the sleeve of the flanged cylindrical body between the concave surfaces of the pair of first molds and between the planes of the pair of second molds;
The flange of the flanged cylindrical body is disposed between the second concave surfaces of the pair of first molds and between the second planes of the pair of second molds,
d) A pair of the first molds until the distance between the center portions of the pair of concave surfaces of the pair of first molds is equal to the length of the long axis of the sleeve of the oval caulking collar to be created. Move the molds closer together,
e) A pair of second molds until the distance between the pair of planes of the pair of second molds is equal to the length of the short axis of the sleeve of the oval caulking collar to be created. The sleeves are moved so as to approach each other, the sleeve is pressed by a pair of the flat surfaces so that a part of the sleeve enters the pair of concave surfaces of the pair of first molds, and the cross section of the sleeve Make an oval,
f) At the same time, the flange is pressed by the pair of second planes so that a part of the flange enters the pair of second concave surfaces of the pair of first molds, Make oval,
This is a method for producing an oval caulking color.

  According to the second aspect of the present invention, since the flange of the oval caulking collar is also molded by the mold, the flange can be molded closer to a desired oval shape.

  In step d), the distance between the center portions of the pair of second concave surfaces of the pair of first molds is equal to the length of the long axis of the flange of the oval caulking collar to be created. Is preferred.

The concave surface of the first mold may have an arc shape in cross section.
If the cross section of the concave surface of the mold is an arc shape, the cross section of the flange can be a combination of an arc and a straight line. As a result, the position of the bolt engaged with the oval caulking collar can be easily adjusted in one direction.

  After the step f), a pin having an outer dimension that fits the inner shape of the oval caulking collar can be inserted from the sleeve side to adjust the inner dimension of the oval caulking collar.

  When a pin having an outer diameter that matches the inner shape of the oval caulking collar is inserted inside, the inner dimension of the oval caulking collar can be accurately formed.

  By forming the thin portion and the thick portion on the sleeve, only the thin portion can be buckled, and the attachment member can be attached between the buckled portion and the flange.

  After the step f), a pin having a first shaft portion having an outer dimension adapted to the thin portion of the oval caulking collar and a second shaft portion having an outer diameter adapted to the thick portion, A step of inserting from the side of the thin portion of the sleeve and adjusting an inner dimension of the thick portion and the thin portion of the oval caulking collar may be provided.

  Inserting a pin with an outer diameter that fits the inner shape of the oval caulking collar into the thick part and the inner part of the thin part can accurately form the inner dimensions of the thick part and thin part of the oval caulking collar. it can.

According to the present invention, it is possible to manufacture an oval caulking collar having an oblong cross section having a flange having a uniform thickness.
Further, a thin portion for expanding the diameter can be formed with a uniform thickness, and an oval caulking collar having an oval cross section that expands in a predetermined shape can be manufactured.

It is a perspective view of a cylinder with a flange. It is a perspective view which shows the process of shape | molding the cylindrical body with a flange of FIG. 1 in the ellipse caulking collar with the metal mold | die of 1st Embodiment. FIG. 3 is a top view of the molding process of FIG. 2. It is a front view of the shaping | molding process of FIG. FIG. 3 is a bottom view of the molding process of FIG. 2. It is sectional drawing along the AA line of FIG. 3 of the formation process of FIG. It is a perspective view which shows the process of shape | molding the cylindrical body with a flange of FIG. 1 by the metal mold | die of 2nd Embodiment to an oval caulking collar. FIG. 8 is a top view of the molding process of FIG. 7. It is a front view of the shaping | molding process of FIG. FIG. 8 is a bottom view of the molding process of FIG. 7. It is sectional drawing along the AA line of FIG. 8 of the shaping | molding process of FIG. It is the perspective view seen from the upper side which shows the state before the process of inserting a pin inside the ellipse caulking collar shape | molded by the process of FIG. 2 of embodiment of this invention, and correct | amending an inner dimension. It is the perspective view which looked at the ellipse caulking collar and pin of FIG. 12 from the lower side. (a) is a plan view of the oval caulking collar and pin of FIG. 12, (b) is a front view, and (c) is a bottom view. It is the perspective view seen from the upper side which shows the process of inserting a pin into the inner side of an oval caulking collar from the state of FIG. 12, and correct | amending an inner dimension. It is the perspective view which looked at the ellipse caulking collar and pin of FIG. 15 from the lower side. (a) is a plan view of the oval caulking collar and pin of FIG. 15, (b) is a front view, and (c) is a bottom view. It is a perspective view of the ellipse caulking collar of the embodiment of the present invention. It is sectional drawing along the EE line of the ellipse caulking collar of FIG. It is sectional drawing which shows the state which set the oval caulking collar of FIG. 18 to the attachment member. It is sectional drawing which shows the state which buckled the thin part of the oval caulking collar of FIG. 18, and was attached to the attachment member. It is the figure which made the cross section the part which shows the state which attached to the to-be-attached member the oval caulking collar attached to the attachment member of FIG. 21 using a volt | bolt and a nut.

Hereinafter, with reference to the drawings, a method of manufacturing an oval caulking collar 10 according to an embodiment of the present invention will be described. The oval caulking collar 10 is formed by the following procedure.
I. Prepare cylindrical body 20 with flange.
II. The flanged cylindrical body 20 is formed into an oval caulking collar by two opposing molds.
III. If necessary, insert the pin 40 inside the oval caulking collar 10 to correct the inner dimension.
Hereinafter, steps I. to III. Will be described in order.

I. Preparation of Flange Cylinder FIG. 1 shows a flanged cylinder 20. First, a flanged cylindrical body 20 shown in FIG. 1 is prepared. The flanged cylinder 20 has a sleeve 26 having a circular cross section, a circular flange 21 formed at one end of the sleeve 26 and having a larger diameter than the sleeve 26, and a cross section passing through the sleeve 26 and the flange 21. It has a circular through hole 23, and the end of the sleeve 26 opposite to the flange 21 is easy to buckle, so that the thickness is thin, and the space between the thin portion 24 and the flange 21 is thick. It is meat part 22.
The flanged cylindrical body 20 can be manufactured by forging or by machining a forged product, but can also be performed by other methods.

II. Molding of Oval Cylinder with Oval Mold Next, the process of molding the flanged cylinder 20 of I. into the oval caulking collar 10 with two pairs of molds 30 will be described. The first embodiment is a method of forming the sleeve 26 into an oval shape with the flange 21 coming out of the mold, and the second embodiment presses the sleeve 26 and the flange 21 with the mold 30 '. Then, it is a method of forming into an oval shape.

(First embodiment)
2 to 6 show a process of forming the oval caulking collar 10 according to the first embodiment. FIG. 2 is a perspective view showing a process of forming the flanged cylindrical body 20 of FIG. 3 is a top view, FIG. 4 is a front view, FIG. 5 is a bottom view, and FIG. 6 is a cross-sectional view taken along line AA in FIG.

  The molding apparatus used in the embodiment of the present invention includes a mold 30, a power unit (not shown) for moving the mold 30, and a control unit (not shown) for controlling the power unit. Prepare. The mold 30 includes a pair of first molds 31 that move in a direction perpendicular to the axial direction of the flanged cylinder 20 in order to form the cylindrical flanged cylinder 20. In addition, a pair of second dies 32 that move in a direction perpendicular to the axial direction of the flanged cylindrical body 20 in a direction perpendicular to the direction of movement of the pair of first dies 31 are provided.

The surfaces in contact with the sleeve 26 of the flanged cylindrical body 20 of the pair of first molds 31 are concave surfaces 31a having a circular arc cross section. The surfaces in contact with the sleeve 26 of the flanged cylindrical body 20 of the pair of second molds 32 are flat surfaces 32a. Further, an arc that is continuous with the concave surfaces 31a of the pair of first molds is formed next to the flat surface 32a that contacts the sleeve 26 of the flanged cylindrical body 20 of the pair of second molds 32. Also good. The first mold 31 and the second mold 32 do not have a surface in contact with the outer periphery of the flange 21 of the flanged cylindrical body 20.
The pair of first molds 31 can be moved to face each other so as to approach each other, and the pair of second molds 32 approach each other in a direction perpendicular to the pair of first molds 31. It can be moved to face away.

In order to form the flanged cylindrical body 20 into the oval caulking collar 10 by the mold 30, it is surrounded by the concave surfaces 31a of the pair of first molds 31 and the plane 32a of the pair of second molds 32. In the space, a sleeve 26 of the flanged cylindrical body 20 to be processed is arranged, and the flange 21 is arranged so as to protrude onto the first mold 31 and the second mold 32.
The pair of first molds 31 are brought close to each other and stopped at a position where the distance between the central portions of the opposing concave surfaces 31a is equal to the length of the long axis of the sleeve 16 of the oval caulking collar 10 to be created.

Next, the pair of second dies 32 are brought close to each other, and the sleeve 26 of the flanged cylindrical body 20 is pressed from the opposing direction by the flat surface 32a of the pair of second dies 32. 2 to 6 show the stage where the flat surface 32a of the second mold 32 contacts the outer surface of the sleeve.
The pair of second molds 32 are brought close to each other and stopped at a position where the distance between the pair of opposed flat surfaces 32a becomes equal to the length of the short axis of the sleeve 16 of the oval caulking collar 10 to be created.
When the sleeve 26 of the flanged cylinder 20 is pressed by the flat surface 32a of the pair of second molds 32, the pressed surface becomes a flat surface. The portion in the direction perpendicular to the pressed portion extends into the opposing concave surfaces 31a of the pair of first molds 31, stops at a position in contact with the concave surfaces 31a, and has an arc shape. Thus, the cross section of the sleeve 26 is formed into an oval shape.

  That is, in a state where the distance between the concave surfaces 31a of the pair of first molds 31 is set, the sleeve 26 of the flanged cylindrical body 20 is pressed by the flat surfaces 32a of the pair of second molds 32, and the pair of first molds 31a. It is spread in the concave surface 31a of one mold 31 and formed into a predetermined oval cross section.

The flange 21 is formed into an oval shape by being pulled by the sleeve 26 by forming the sleeve 26 into an oval shape.
The position of the flange 21 in contact with the central part of the concave surface 21a of the pair of first molds 31 is the long axis of the flange 11 formed into an oval shape and is pressed by the central part of the pair of second molds 32. The position is the short axis of the flange 11 formed into an oval shape. The flanged cylindrical body 20 is formed into an oval caulking collar 10.

The cross section of the concave surface 31a of the first mold 31 is an arc, and the cross section of the flat surface 32a of the second mold 32 is a straight line, but the concave surface of the mold 31 of the sleeve 16 of the formed oval caulking collar 10 is formed. The boundary between the portion pressed by 31a and the portion pressed by the flat surface 32a of the mold 32 is a curve in which an arc and a straight line are smoothly continuous.
The surface that presses the sleeve 26 of the second mold 32 may be formed of a flat surface 32a and an arc.

  When the flange 21 of the flanged cylinder 20 is formed by the first mold 31 and the second mold 32, the flange 21 protrudes on the upper surfaces of the first mold 31 and the second mold 32. Yes. When an elliptical cylindrical body is formed by pressing the cylindrical sleeve 26 (thick part 22 and thin part 24) with the first mold 31 and the second mold 32, the sleeve 26 becomes oval. As a result, the outer diameter of the flange 21 also becomes oval.

  Unlike this method, the pair of first molds 31 and the pair of second molds 32 are moved simultaneously to press the sleeve 26 of the flanged cylindrical body 20 from four directions, and the cross section of the sleeve 26 is elongated. It can also be formed into a circle.

  The cross section of the concave surface 31a of the first mold 31 is an arc, and the cross section of the plane 32a of the second mold 32 is a straight line. However, in the cross section of the sleeve 16 after molding, the arc portion and the straight portion The boundary is a smoothly continuous curve.

  The concave surface 31a of the first mold 31 has an oval cross section, and the sleeve 16 has an oval cross section.

(Second Embodiment)
7 to 11 show the formation of the oval caulking collar 10 according to the second embodiment. FIG. 7 is a perspective view showing a process of forming the flanged cylindrical body of FIG. 1 into an ellipse using a mold. 8 is a top view, FIG. 9 is a front view, FIG. 10 is a bottom view, and FIG. 11 is a cross-sectional view taken along line AA in FIG.
In the first embodiment, the flange 21 is not formed by a mold, and the sleeve 26 is formed into an oval shape by forming the sleeve 26 into an oval shape. In the second embodiment, the flange 21 is also formed in an oval shape by a mold.

  A mold 30 ′ used in the second embodiment includes a pair of first molds 31 ′ that press the cylindrical flanged cylinder 20 from both sides in a direction perpendicular to the axial direction of the flanged cylinder 20, and A pair of first molds 31 and a pair of second molds 32 ′ that are pressed from both sides in a perpendicular direction are provided.

  In the second embodiment, the flange 21 is also formed by pressing with the first and second molds 31 ′, 32 ′. The surfaces of the first mold 31 ′ for pressing the flanged cylindrical body 20 are a pair of concave surfaces 31 a for pressing the sleeve 26 (thick portion 22 and thin portion 24) and a pair for pressing the flange 21. The second concave surface 31b. The cross sections of the concave surface 31a and the second concave surface 31b are arcuate. The radius of the arc of the second concave surface 31b is larger than the radius of the arc of the concave surface 31a. The distance between the pair of second concave surfaces 31 b that press the flange 21 is longer than the distance between the pair of concave surfaces 31 a that press the sleeve 26.

The surface for pressing the flanged cylindrical body 20 of the second mold 32 ′ includes a pair of flat surfaces 32 a for pressing the sleeve 26 and a pair of second flat surfaces 32 b for pressing the flange 21. The distance between the pair of second planes 32 b that press the flange 21 is longer than the distance between the pair of planes 32 a that press the sleeve 26.
The surface that presses the flanged cylindrical body 20 of the second mold 32 ′ may be composed of a flat surface and an arc that curves in the direction of the first mold on both sides of the flat surface.

  The flanged cylinder 20 is pressed into the collar 10 by pressing the flanged cylinder 20 with the pair of first molds 31 ′ and the pair of second molds 32 ′. The position of the center part of the pair of first molds 31 ′ is the long axis of the oval caulking collar 10, and the position pressed by the center part of the pair of second molds 32 is the short axis of the oval cylindrical body 10. become.

In order to form an oval caulking collar according to the second embodiment, the sleeve 26 of the flanged cylindrical body 20 is positioned at the height of the concave surface 31a of the first mold 31 'and the plane 32a of the second mold. The flanged cylinder 20 is positioned so that the flange 21 is positioned at the height of the second concave surface 31b of the first mold 31 'and the second plane 32b of the second mold 32'. A cylindrical body 20 is arranged. That is, the height of the boundary between the sleeve 26 and the flange 21 of the cylindrical body 20 with flange is equal to the height of the boundary between the concave surface 31a of the first mold 31 ′ and the second concave surface 31b (of the second mold 32 ′). The height of the boundary between the plane 32a and the second plane 32b).
The pair of first molds 31 'are brought close to each other and stopped at a position where the distance between the center portions of the opposing concave surfaces 31a is the length of the long axis of the sleeve 16 of the oval caulking collar 10 to be formed. .

Next, the pair of second molds 32 ′ are brought close to each other, and the sleeve 26 of the flanged cylindrical body 20 is pressed from the opposing direction by the flat surface 32a of the pair of second molds 32 ′. At the same time, the flange 21 of the flanged cylinder 20 is pressed by the second flat surface 32b of the pair of second molds 32 ′. 7 to 11 show the stage where the flat surface 32a of the second mold 32 'contacts the outer surface of the sleeve 26. FIG.
When the sleeve 26 of the flanged cylinder 20 is pressed by the flat surface 32a of the pair of second molds 32 ′, the pressed surface becomes a flat surface. The portion perpendicular to the pressed portion extends to a position in contact with the opposing concave surface 31a of the pair of first molds 31 ', and the cross section of the sleeve 26 is formed into an oval shape.

  When the flange 21 of the flanged cylinder 20 is pressed by the second plane 32b of the pair of second molds 32 ′, the pressed surface becomes a plane. The portion in the direction perpendicular to the pressed portion extends to a position in contact with the opposing second concave surface 31b of the pair of first molds 31 ′, and has a circular arc cross section. Thus, the cross section of the flange 21 is formed into an oval shape.

The cross section of the concave surface 31a of the mold 31 ′ is an arc, and the cross section of the flat surface 32a of the mold 32 ′ is a straight line, but is pressed by the concave surface 31a of the mold 31 ′ of the sleeve 16 of the formed oval caulking collar. The boundary between this portion and the portion pressed by the flat surface 32a of the mold 32 'is a curve in which an arc and a straight line are smoothly continued.
Similarly, the cross section of the second concave surface 31b of the mold 31 'is an arc, and the cross section of the second plane 32b of the mold 32' is a straight line, but the flange 21 of the molded oval caulking collar is formed. The boundary between the portion pressed by the second concave surface 31b of the mold 31 ′ and the portion pressed by the second flat surface 32b of the mold 32 ′ is a curved line in which an arc and a straight line are smoothly continuous.

  In the molding method of the second embodiment, the flange can be molded into a desired oval shape as compared with the molding method of the first embodiment.

  Also in the second embodiment, similarly to the first embodiment, the pair of first molds 31 ′ and the pair of second molds 32 ′ are moved simultaneously to form a sleeve of the flanged cylindrical body 20. The sleeve 26 and the flange 21 can be pressed to form an oval cross section of the sleeve 26 and the flange 21.

III. Correction of inner dimension of oval caulking collar The oval cylindrical body with flange after the cross section of the flanged cylindrical body 20 is formed into an oval shape is referred to as an oval caulking collar 10. Each portion of the oval caulking collar 10 having an oval cross section is represented by a flange 11, a sleeve 16, a thick portion 12, a through hole 13, a thin portion 14, and a step portion 15.

  FIG. 12 is a perspective view seen from above showing a state before the step of correcting the inner dimension by inserting the pin 40 inside the oval caulking collar 10 formed by the step of FIG. 2 of the embodiment of the present invention. is there. 13 is a perspective view of the state of FIG. 12 as viewed from below, FIG. 14 (a) is a plan view, (b) is a front view, and (c) is a bottom view.

The process of correcting the inner dimension of the oval caulking collar 10 of III is applied to both the oval caulking collar 10 molded according to the first embodiment and the oval caulking collar 10 molded according to the second embodiment. be able to.
The step of correcting the inner dimension of the oval cylindrical body of III. Is optional, and the step of III. May not be performed.

The pin 40 is inserted inside the oval caulking collar 10 formed in the process of II. The device for correcting the inner dimension includes a pin 40 inserted inside the oval caulking collar 10, a pin driving device (not shown) for driving the pin 40, and a control device (not shown) for controlling the pin driving device. With.
The pin 40 to be inserted inside the oval caulking collar 10 includes a first shaft portion 41 having an oval cross section, a step portion 42 following the first shaft portion 41, and a second shaft having a smaller diameter than the first shaft portion 41. And a tip portion 44 having a diameter smaller than that of the second shaft portion 43.

  The first shaft portion 41 is a portion that molds the inner diameter of the thin portion 14 of the oval caulking collar 10 having an oval cross section, and is adapted to the inner diameter of the thin portion 14. The second shaft portion 43 is a portion for molding the inner diameter of the thick portion 12 of the oval caulking collar 10 and is adapted to the inner diameter of the thick portion 12. The distal end portion 44 is thinner than the inner diameter of the thick portion 12 in order to guide and insert the pin 40 into the through hole 13 of the oval caulking collar 10.

  FIG. 15 is a perspective view seen from the upper side showing the process of inserting the pin 40 inside the oval caulking collar 10 to correct the inner dimension from the state of FIG. 16 is a perspective view seen from the lower side of FIG. 15, FIG. 17 (a) is a plan view, (b) is a front view, and (c) is a bottom view.

In order to correct the inner dimension of the oval caulking collar 10, the pin driving device is driven, and the tip end portion 44 of the pin 40 is inserted from the thin portion 14 side of the oval caulking collar 10. Through the flange 11 side. The pin 40 is stopped at a position where the step portion 42 of the pin 40 contacts the step portion 15 at the boundary between the thick portion 12 and the thin portion 14 of the oval caulking collar 10. The inner diameter of the thick portion 12 is corrected by the second shaft portion 43, and the inner diameter of the thin portion 14 is corrected by the first shaft portion 41.
The step of correcting the inner diameter of the oval caulking collar 10 is optional and may not be performed. However, if this step is performed, the inner diameters of the thick portion 12 and the thin portion 14 can be finished with higher accuracy.

(Oval caulking color)
The oval caulking collar 10 according to the embodiment of the present invention produced by the steps I. to III. Will be described. FIG. 18 is a perspective view of the oval caulking collar 10 according to the embodiment of the present invention. FIG. 19 is a cross-sectional view of the oval caulking collar 10 taken along line EE in FIG.

The oval caulking collar 10 includes a sleeve 16 having an oval cross section and a flange 11 formed at one end of the sleeve 16 and having a larger diameter than the sleeve 16. The sleeve 16 has a thick part 12 that is thick adjacent to the flange 11 and a thin part 14 that is thin on the side far from the flange 11.
Cross-section of the sleeve 16 is oval consisting arcs and straight lines, the length of the major axis of the ellipse is D _L, length of the minor axis (the distance between the straight section) is D _S.

  A through-hole 13 that penetrates the caulking collar 10 in the axial direction is formed inside the flange 11 and the sleeve 16. The cross section of the through hole 13 is oval. An inclined step portion 15 is provided between a portion inside the thick portion 12 of the through hole 13 and a portion inside the thin portion 14 of the through hole 13.

  FIG. 20 is a cross-sectional view in the minor axis direction showing a state in which the oval caulking collar 10 of FIG. 18 is set on an attachment member 50 made of a resin component.

  The material of the oval caulking collar 10 can be used as long as it is a plastically deformable material. For example, iron or aluminum. Further, the oval caulking collar 10 may be surface-treated as long as it can withstand deformation during caulking. For example, it may be plated to prevent rust. Furthermore, materials other than metals can be used as long as they are plastically deformed.

A mounting hole 53 is formed in the mounting member 50. The shape of the mounting hole 53 is oval so that the sleeve 16 of the oval caulking collar 10 can be inserted, and the length of the long axis of the mounting hole 53 is equal to or longer than the length D _L of the long axis of the sleeve 16. The length of the short axis of the mounting hole 53 is a little larger than the length D _S of the short axis of the sleeve 16.

A concave portion 51 having a countersink shape is provided below the mounting hole 53 in order to accommodate the flange 11 of the oval caulking collar 10. The outer shape of the recess 51 is also oval.
A counterbore portion 52 having a countersink shape is provided in the upper portion of the attachment hole 53 in order to accommodate the enlarged diameter portion 14a in which the distal end portion of the oval caulking collar 10 is deformed. The external shape of the spot facing portion 52 is also oval.

  The recess 51 and the spot facing 52 can be omitted. When the recess 51 is not provided, the flange 11 projects from the lower surface of the mounting member 50. When the spot facing portion 52 is not provided, the enlarged diameter portion 14a protrudes from the upper surface of the mounting member 50.

FIG. 21 is a cross-sectional view showing a state in which the thin portion 14 of the oval caulking collar 10 in the state of FIG. 20 is buckled and attached to the attachment member 50.
From the state of FIG. 20, the lower surface of the flange 11 of the oval caulking collar 10 and the upper end surface of the thin wall portion 14 are pressed in the axial direction by using a press or a hand-held fastening tool. The thin wall portion 14 is buckled.
The thin-walled portion 14 expands larger than the inner diameter of the mounting hole 53 of the mounting member 50, and becomes the expanded-diameter portion 14a. The enlarged diameter portion 14a is accommodated in the counterbore portion 52.

  The peripheral portion of the mounting hole 53 of the mounting member 50 is sandwiched between the flange 11 housed in the recess 51 and the enlarged diameter portion 14a in the counterbore 52, and the oval caulking collar 10 is mounted on the mounting member 50. It is attached so as not to fall out.

FIG. 22 shows a state in which the attachment member 50 to which the oval caulking collar 10 is attached is fixed to the attachment member 55 by using the bolt 58 and the nut 59. Align the position of the through hole 13 of the oval caulking collar 10 attached to the attachment member 50 such as a resin part and the attachment hole 56 of the attached member 55, and insert the bolt 58 from the attachment member 50 side through the washer 57. Then, the front end portion of the bolt 58 is made to protrude from the mounting hole 56 of the mounted member 55. The female screw of the nut 59 is engaged with the male screw of the bolt 58, and the mounting member 50 is fastened to the mounted member 55.
Contrary to FIG. 22, the bolt 58 can be inserted from the attached member 55 side.

  The minor axis direction of the ellipse caulking collar 10 is the horizontal direction of FIG. 22, and the major axis direction of the ellipse caulking collar 10 is a direction perpendicular to the plane of FIG. The mounting hole 56 of the mounted member 55 has a circular cross section. Even if the position of the mounting hole 56 of the mounted member 55 is shifted in the direction perpendicular to the surface of FIG. 22, the position where the bolt 58 is mounted is within the through hole 13 of the oval caulking collar 10 and is perpendicular to the surface of FIG. It can be adjusted and attached.

According to the first and second embodiments of the present invention, it is possible to manufacture an oval caulking collar having an oval cross section having a flange having a uniform thickness.
In addition, the thin-walled portion for expanding the diameter can be formed with a uniform thickness and a uniform length, and an oval caulking collar having an oblong cross section with a predetermined shape can be manufactured.

10 Oval caulking color
11 Flange
12 Thick part
13 Through hole
14 Thin section
14a Expanded part
15 steps
16 sleeve
20 Cylindrical body with flange
21 Flange
22 Thick part
23 Through hole
24 Thin section
25 steps
26 sleeve
30 mold
31 First mold
31a Concave
31b Second concave surface
32 Second mold
32a plane
32b Second plane
40 pin
41 1st shaft
42 steps
43 Second shaft
44 Tip
50 Mounting member
51 recess
52 Counterbore
53 Mounting hole
55 Mounted member
56 Mounting hole
57 Washer
58 volts
59 nut

Claims (6)

A sleeve having an oval cross section and an oval flange formed at one end of the sleeve and having a larger diameter than the sleeve, and a through hole having an oval cross section passing through the sleeve and the flange is formed. A method of manufacturing an oval caulking color,
a) a sleeve having a circular section and a circular flange formed at one end of the sleeve and having a larger diameter than the sleeve, and a through-hole having a circular section passing through the sleeve and the flange is formed Prepare a cylinder with flange,
b) A pair of first molds having a concave surface for pressing the sleeve of the flanged cylindrical body, and a pair of planes for pressing the sleeve of the flanged cylindrical body from a direction perpendicular to the concave surface. And a second mold of
c) disposing the sleeve of the flanged cylindrical body between the concave surfaces of the pair of first molds and between the planes of the pair of second molds;
d) A pair of the first molds until the distance between the center portions of the pair of concave surfaces of the pair of first molds is equal to the length of the long axis of the sleeve of the oval caulking collar to be created. Move the molds closer together,
e) A pair of second molds until the distance between the pair of planes of the pair of second molds is equal to the length of the short axis of the sleeve of the oval caulking collar to be created. The sleeves are moved so as to approach each other, the sleeve is pressed by a pair of the flat surfaces so that a part of the sleeve enters the pair of concave surfaces of the pair of first molds, and the cross section of the sleeve Make an oval,
f) By deforming the sleeve, the flange is made oval.
A method for producing an oval caulking color characterized by the above. A sleeve having an oval cross section and an oval flange formed at one end of the sleeve and having a larger diameter than the sleeve, and a through hole having an oval cross section passing through the sleeve and the flange is formed. A method of manufacturing an oval caulking color,
a) a sleeve having a circular section and a circular flange formed at one end of the sleeve and having a larger diameter than the sleeve, and a through-hole having a circular section passing through the sleeve and the flange is formed Prepare a cylinder with flange,
b) a pair of first molds having a concave surface for pressing the sleeve of the flanged cylinder and a second concave surface for pressing the flange; and the sleeve of the flanged cylinder. Preparing a pair of second molds having a plane for pressing from the direction perpendicular to the concave surface and a second plane for pressing the flange;
c) disposing the sleeve of the flanged cylindrical body between the concave surfaces of the pair of first molds and between the planes of the pair of second molds;
The flange of the flanged cylindrical body is disposed between the second concave surfaces of the pair of first molds and between the second planes of the pair of second molds,
d) A pair of the first molds until the distance between the center portions of the pair of concave surfaces of the pair of first molds is equal to the length of the long axis of the sleeve of the oval caulking collar to be created. Move the molds closer together,
e) A pair of second molds until the distance between the pair of planes of the pair of second molds is equal to the length of the short axis of the sleeve of the oval caulking collar to be created. The sleeves are moved so as to approach each other, the sleeve is pressed by a pair of the flat surfaces so that a part of the sleeve enters the pair of concave surfaces of the pair of first molds, and the cross section of the sleeve Make an oval,
f) At the same time, the flange is pressed by the pair of second planes so that a part of the flange enters the pair of second concave surfaces of the pair of first molds, Make oval,
A method for producing an oval caulking color characterized by the above. A method for producing an oval caulking collar according to claim 1 or 2,
The concave surface of the first mold is a manufacturing method of an oval caulking collar having a circular cross section. A manufacturing method according to any one of claims 1 to 3,
After the step f), an oval caulking step is provided that includes inserting a pin having an outer dimension that conforms to the inner shape of the oval caulking collar from the side of the sleeve and adjusting the inner dimension of the oval caulking collar. Color manufacturing method. A manufacturing method according to any one of claims 1 to 3,
The sleeve of the flanged cylindrical body is a manufacturing method of an oval caulking collar including a thick part having a large thickness and a thin part having a small thickness for buckling and expanding the diameter. It is a manufacturing method of Claim 5, Comprising:
After the step f), a pin having a first shaft portion having an outer dimension adapted to the thin portion of the oval caulking collar and a second shaft portion having an outer diameter adapted to the thick portion, A method for manufacturing an oval caulking collar, comprising a step of inserting from the side of the thin wall portion of the sleeve and adjusting an inner dimension of the thick wall portion and the thin wall portion of the oval caulking collar.

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