WO2014030386A1 - Press-fitted bolt - Google Patents

Press-fitted bolt Download PDF

Info

Publication number
WO2014030386A1
WO2014030386A1 PCT/JP2013/061160 JP2013061160W WO2014030386A1 WO 2014030386 A1 WO2014030386 A1 WO 2014030386A1 JP 2013061160 W JP2013061160 W JP 2013061160W WO 2014030386 A1 WO2014030386 A1 WO 2014030386A1
Authority
WO
WIPO (PCT)
Prior art keywords
press
base material
bolt
diameter
fitting
Prior art date
Application number
PCT/JP2013/061160
Other languages
French (fr)
Japanese (ja)
Inventor
鈴木　秀直
Original Assignee
新日本ファスナー工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 新日本ファスナー工業株式会社 filed Critical 新日本ファスナー工業株式会社
Publication of WO2014030386A1 publication Critical patent/WO2014030386A1/en

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates
    • F16B37/06—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting
    • F16B37/062—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of riveting
    • F16B37/068—Devices for fastening nuts to surfaces, e.g. sheets, plates by means of welding or riveting by means of riveting by deforming the material of the support, e.g. the sheet or plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
    • F16B35/041—Specially-shaped shafts
    • F16B35/048—Specially-shaped necks

Definitions

  • the present invention relates to a press-fitting bolt, and in particular, a knurl forming portion that is formed on the base side of a head portion, a screw portion, and the screw portion and is fixed to the base material by press-fitting into a prepared hole formed in the base material. It is related with the press-fitting bolt provided with.
  • the press-fit bolt described in Patent Document 1 causes the convex portion formed on the end face of the head to bite into the base material by press-fitting the bolt into the lower hole formed in the base material, and the convex portion The bolt is mechanically fixed to the base material by absorbing the surplus of the base material by the concave portion formed adjacently.
  • this press-fit bolt has a small fixing strength (rotational torque resistance applied to the press-fit bolt during use) to the base material of the bolt only by fixing with the convex portion formed on the end face of the head.
  • the caulking portion formed on the press-fitting bolt is plastically deformed so that the base material is sandwiched between the end surface of the head and the caulking portion. For this reason, there has been a problem that a large processing force is required to plastically deform the caulking portion, and the processing apparatus is increased in size.
  • a bolt is machined into the base material by press-fitting a knurled portion formed on the base side of the threaded portion into a prepared hole formed in the base material.
  • the fixing strength of the bolt against the base metal can be obtained only by fixing with the knurled crimped part formed on the base side of the threaded part (rotation torque resistance applied to the press-fitted bolt during use) ) Is small, in order to increase the fixing strength, the caulking portion is also plastically deformed so that the base material is sandwiched between the end surface of the head and the caulking portion. For this reason, there has been a problem that a large working force is required to plastically deform the caulked portion subjected to the knurling process, and the working apparatus is increased in size.
  • JP-A-1-158205 Japanese Patent Laid-Open No. 9-291921
  • the present invention can obtain a large fixing strength for the base material of the bolt without providing a caulking portion, and can also provide a mother on the opposite side of the head serving as the seating surface of the nut.
  • An object of the present invention is to provide a press-fitting bolt that does not roughen the surface of the material.
  • the press-fitting bolt of the present invention is fixed to the base material by press-fitting into a head, a screw part, and a base side of the screw part and formed in a prepared hole formed in the base material.
  • the diameter of the threaded portion is larger than the threaded portion that absorbs the surplus material of the base material when the press-fit bolt is press-fitted into the base material between the screw portion and the knurled portion.
  • a step portion having a diameter that is the same as or smaller than the diameter of the valley of the knurled portion is formed.
  • annular groove can be formed on the end surface of the stepped portion.
  • the press-fitting bolt of the present invention when the press-fitting bolt is press-fitted into the base material between the screw part and the knurl forming part, the extra diameter of the base material is absorbed, and the knurled diameter is larger than the diameter of the thread part.
  • a step portion having the same diameter as the diameter of the valley of the formation portion or a diameter smaller than that, it is possible to absorb the surplus material of the base material by this step portion, and the head portion that becomes the seating surface of the nut
  • the surface of the base material on the opposite side can be prevented from becoming rough, and the diameter of the knurled portion can be set to a diameter that can obtain the necessary fixing strength for the base material of the bolt.
  • the processing apparatus can be reduced in size.
  • the groove can surely absorb the surplus of the base material, and the base material on the opposite side of the head serving as the seating surface of the nut. It is possible to prevent the surface of the substrate from becoming rough.
  • FIG. 6 is a cross-sectional view taken along line AA in FIG. 4-5. It is explanatory drawing which shows 2nd Example of the press-fitting bolt of this invention. It is explanatory drawing of the process of fixing the press-fitting bolt to a base material.
  • FIG. 6 is a cross-sectional view taken along line AA in FIG. 7-5.
  • the press-fitting bolt 1 is formed on the base 11 by being press-fitted into a head 11, a screw part 12, and a base hole 21 formed in the base material 2.
  • the press-fitting bolt provided with the knurled part 13 fixed to 2 when the press-fitted bolt 1 is press-fitted into the base material 2 between the screw part 12 and the knurled part 13, the surplus of the base material 2 is absorbed.
  • a step portion 14 having a diameter D14 larger than the diameter D12 of the crest of the screw portion 12 and having the same diameter as that of the valley D13 of the knurling formation portion 13 or smaller than that is formed.
  • the total height of the height H13 of the knurling portion 13 and the height H14 of the stepped portion 14 is smaller than the thickness H2 of the base material 2, and the diameter D14 of the stepped portion 14 is Each is set so as to be slightly smaller than the diameter D21 of the lower hole 21 of the material 2.
  • the stepped portion 14 may be formed in a truncated cone shape having a large diameter on the knurled portion 13 side and a small diameter on the screw portion 12 side. Preferably, this makes it possible to smoothly flow the surplus of the base material 2.
  • This press-fitting bolt 1 can be preferably obtained by forging a round bar. Specifically, as shown in FIG. 2 (a), by forging a round bar 1A as a material, after obtaining an intermediate material 1B having a flange 11B as shown in FIG. 2 (b). As shown in FIG. 2 (c), the knurled portion 13 and the stepped portion 14 are forged and formed in the flange portion 11B, and then the head 11 is forged as shown in FIG. 2 (d). be able to.
  • the threaded portion 12 can be formed by a known method such as rolling.
  • FIG. 3 shows a step of fixing the press-fitting bolt 1 to the base material 2.
  • the press-fitting bolt 1 is installed in the prepared hole 21 formed in the base material 2.
  • the receiving die 3 is installed under the base material 2.
  • a hole 31 for receiving the threaded portion 12 of the press-fitting bolt 1 is formed in the receiving die 3.
  • the hole 31 is preferably formed so that its diameter D31 is slightly larger than the diameter D12 of the threaded portion 12 of the press-fitting bolt 1 so that the press-fitting bolt 1 can be positioned.
  • the press-fitting bolt 1 is pressed by pressing the head 11 of the press-fitting bolt 1 with a pressing member (not shown) while the base material 2 is supported by the receiving die 3. 1 is pressed into the base material 2.
  • the generated burrs are completely absorbed between the receiving die 3 and the stepped portion 14 as shown in FIG.
  • the surface of the part is flush with the surface of the base material 2 (or in a state of being recessed from the surface of the base material 2).
  • the step 14 can absorb the surplus of the base material 2 and can prevent the surface of the base material 2 serving as the seating surface of the nut from being roughened by burrs, and the press-fitting bolt.
  • the surface of the base material 2 that serves as the seating surface of the nut can be kept flat, in combination with the fact that the press-fitting marks are less likely to appear on the surface of the base material 2.
  • the diameters of the knurl forming portion 13 and the stepped portion 14 can be set independently, the diameter of the knurl forming portion 13 can be set to a diameter capable of obtaining a necessary fixing strength with respect to the base material 2 of the press-fitting bolt 1.
  • the processing apparatus can be reduced in size.
  • this press-fit bolt 1 has the above-mentioned characteristics, it can be suitably used for a metal base material having a relatively high hardness such as copper or iron.
  • 4-1 to 4-7 show more specific examples of the press-fitting bolt 1.
  • the press-fitting bolt 1 is formed on the base 11 by forming a head 11, a screw 12, and a base 21 of the screw 12, and press-fitting into a lower hole 21 formed in the base 2.
  • the press-fitting bolt provided with the knurled part 13 fixed to 2 when the press-fitted bolt 1 is press-fitted into the base material 2 between the screw part 12 and the knurled part 13, the surplus material of the base material 2 is absorbed.
  • An annular groove 14a is formed.
  • FIG. 6 shows a step of fixing the press-fitting bolt 1 to the base material 2.
  • the shape of the lower hole 21 formed in the base material 2 is not a uniform hole diameter, but a shape in which the seating surface side of the nut is narrowed. It can prevent that the surface of the base material 2 used as a seating surface becomes rough.
  • This process is basically the same as the press-fitting bolt 1 of the first embodiment, but the press-fitting bolt 1 of this embodiment forms an annular concave groove 14a on the end face of the stepped portion 14.
  • the burrs generated on the front surface in the advancing direction of the knurled portion 13 can be reliably absorbed by the concave grooves 14a, and the burrs generated on the surface of the base material 2 serving as the seating surface of the nut are more reliably damaged. Can be prevented.
  • this press-fit bolt 1 has the above-mentioned characteristics, it can be suitably used for a metal base material having a relatively low hardness such as aluminum.
  • FIGS. 7-1 to 7-7 show more specific examples of the press-fitting bolt 1.
  • the press-fitting bolt of the present invention has been described based on a plurality of embodiments, the present invention is not limited to the configurations described in the above-described embodiments, and the configuration is appropriately changed without departing from the spirit thereof. Is something that can be done.
  • the press-fitting bolt of the present invention can obtain a large fixing strength with respect to the base material of the bolt without providing a caulking portion, and the surface of the base material on the side opposite to the head serving as the seating surface of the nut is not roughened. Since it has the characteristic, it can be used suitably for the use which implants a bolt in various metal base materials, such as iron, copper, and aluminum.

Abstract

The purpose of the invention is to provide a press-fitted bolt in which high fixing strength of the bolt relative to the parent material can be achieved without providing a crimped part, and in which there is no roughening on the surface of the parent material that is the seating surface of the nut and is on the opposite side from head of the bolt. The bolt comprises a head (11), a threaded part (12), and a knurled part (13) formed in the base side of the threaded part (12) and fixed to the parent material (2) by being press-fitted in a bottom hole (21) formed in the parent material (2). Furthermore, formed between the threaded part (12) and the knurled part (13) is a ridge (14) for absorbing the extra thickness of the parent material (2) when the press-fitted bolt (1) is press-fitted into the parent material (2), the ridge having a diameter (D14) that is greater than the diameter (D12) of the shaft of the threaded part (12) and that is equal to or less than the diameter (D13) of the recesses of the knurled part (13).

Description

圧入ボルトPress-fit bolt
　本発明は、圧入ボルトに関し、特に、頭部と、ねじ部と、該ねじ部の基部側に形成され、母材に形成された下孔に圧入することにより母材に固定されるローレット形成部とを備えた圧入ボルトに関するものである。 The present invention relates to a press-fitting bolt, and in particular, a knurl forming portion that is formed on the base side of a head portion, a screw portion, and the screw portion and is fixed to the base material by press-fitting into a prepared hole formed in the base material. It is related with the press-fitting bolt provided with.
　従来、母材にボルトを植設するために、スタッドボルトが汎用されてきたが、母材の多様化（鉄以外の銅やアルミニウム等）への対応の容易性、作業時間を含む作業性の向上、低コスト化を目的として、母材に形成された下孔にボルトを圧入することにより母材にボルトを機械的に固定する圧入ボルトが提案され、実用化されている（特許文献１及び２参照）。 Conventionally, stud bolts have been widely used to implant bolts in the base metal. However, it is easy to respond to diversification of base metal (copper and aluminum other than iron, etc.) and workability including work time. For the purpose of improvement and cost reduction, a press-fitting bolt that mechanically fixes a bolt to a base material by press-fitting the bolt into a pilot hole formed in the base material has been proposed and put into practical use (Patent Document 1 and 2).
　このうち、特許文献１に記載の圧入ボルトは、母材に形成された下孔にボルトを圧入することにより、頭部の端面に形成した凸部を母材に食い込ませるとともに、該凸部に隣接して形成した凹部で母材の余肉を吸収することにより、母材にボルトを機械的に固定するものである。 Among these, the press-fit bolt described in Patent Document 1 causes the convex portion formed on the end face of the head to bite into the base material by press-fitting the bolt into the lower hole formed in the base material, and the convex portion The bolt is mechanically fixed to the base material by absorbing the surplus of the base material by the concave portion formed adjacently.
　しかしながら、この圧入ボルトは、頭部の端面に形成した凸部による固定だけではボルトの母材に対する固定強度（使用時に圧入ボルトにかかる回転トルク耐力）が小さいため、固定強度を高めるために、併せて、圧入ボルトに形成したかしめ部を塑性変形させて、頭部の端面とかしめ部とで母材を挟持するようにしている。
　このため、かしめ部を塑性変形させるために大きな加工力が必要となり、加工装置が大型化するという問題があった。
　なお、この場合、かしめ部を設けずに固定強度を高めるためには、凸部の突出高さを大きくする必要があるが、このようにすると、圧入ボルトに螺合されるナットの着座面となる頭部の反対側の母材の表面に圧入痕が現れ、着座面が荒れるという問題が生じることとなる。 However, this press-fit bolt has a small fixing strength (rotational torque resistance applied to the press-fit bolt during use) to the base material of the bolt only by fixing with the convex portion formed on the end face of the head. Thus, the caulking portion formed on the press-fitting bolt is plastically deformed so that the base material is sandwiched between the end surface of the head and the caulking portion.
For this reason, there has been a problem that a large processing force is required to plastically deform the caulking portion, and the processing apparatus is increased in size.
In this case, in order to increase the fixing strength without providing the caulking portion, it is necessary to increase the protruding height of the convex portion, but in this case, the seating surface of the nut screwed into the press-fitting bolt A press-fitting mark appears on the surface of the base material on the opposite side of the head, and the problem arises that the seating surface becomes rough.
　また、特許文献２に記載の圧入ボルトのように、ねじ部の基部側に形成したローレット加工を施したかしめ部を母材に形成された下孔に圧入することにより、母材にボルトを機械的に固定するものも提案されているが、ねじ部の基部側に形成したローレット加工を施したかしめ部のローレットによる固定だけではボルトの母材に対する固定強度（使用時に圧入ボルトにかかる回転トルク耐力）が小さいため、固定強度を高めるために、併せて、かしめ部を塑性変形させて、頭部の端面とかしめ部とで母材を挟持するようにしている。
　このため、ローレット加工を施したかしめ部を塑性変形させるために大きな加工力が必要となり、加工装置が大型化するという問題があった。 Further, like the press-fit bolt described in Patent Document 2, a bolt is machined into the base material by press-fitting a knurled portion formed on the base side of the threaded portion into a prepared hole formed in the base material. However, the fixing strength of the bolt against the base metal can be obtained only by fixing with the knurled crimped part formed on the base side of the threaded part (rotation torque resistance applied to the press-fitted bolt during use) ) Is small, in order to increase the fixing strength, the caulking portion is also plastically deformed so that the base material is sandwiched between the end surface of the head and the caulking portion.
For this reason, there has been a problem that a large working force is required to plastically deform the caulked portion subjected to the knurling process, and the working apparatus is increased in size.
特開平１－１５８２０５号公報JP-A-1-158205 特開平９－２９１９２１号公報Japanese Patent Laid-Open No. 9-291921
　本発明は、上記従来の圧入ボルトの有する問題点に鑑み、かしめ部を設けることなくボルトの母材に対する大きな固定強度を得ることができるとともに、ナットの着座面となる頭部の反対側の母材の表面が荒れることのない圧入ボルトを提供することを目的とする。 In view of the above-described problems of the conventional press-fitting bolt, the present invention can obtain a large fixing strength for the base material of the bolt without providing a caulking portion, and can also provide a mother on the opposite side of the head serving as the seating surface of the nut. An object of the present invention is to provide a press-fitting bolt that does not roughen the surface of the material.
　上記目的を達成するため、本発明の圧入ボルトは、頭部と、ねじ部と、該ねじ部の基部側に形成され、母材に形成された下孔に圧入することにより母材に固定されるローレット形成部とを備えた圧入ボルトにおいて、前記ねじ部とローレット形成部の間に、圧入ボルトを母材に圧入したときに母材の余肉を吸収する、ねじ部の山の直径より大径で、ローレット形成部の谷の直径と同径又はそれより小径の直径を有する段部を形成したことを特徴とする。 In order to achieve the above object, the press-fitting bolt of the present invention is fixed to the base material by press-fitting into a head, a screw part, and a base side of the screw part and formed in a prepared hole formed in the base material. In the press-fitting bolt provided with the knurled portion, the diameter of the threaded portion is larger than the threaded portion that absorbs the surplus material of the base material when the press-fit bolt is press-fitted into the base material between the screw portion and the knurled portion. A step portion having a diameter that is the same as or smaller than the diameter of the valley of the knurled portion is formed.
　この場合において、前記段部の端面に環状の凹溝を形成することができる。 In this case, an annular groove can be formed on the end surface of the stepped portion.
　本発明の圧入ボルトによれば、ねじ部とローレット形成部の間に、圧入ボルトを母材に圧入したときに母材の余肉を吸収する、ねじ部の山の直径より大径で、ローレット形成部の谷の直径と同径又はそれより小径の直径を有する段部を形成することにより、この段部によって母材の余肉を吸収することができ、ナットの着座面となる頭部の反対側の母材の表面が荒れることを防止することができるとともに、ローレット形成部の直径をボルトの母材に対する必要な固定強度を得ることができる直径に設定することができ、従来の圧入ボルトのようにかしめ部を設ける必要がないため、加工装置を小型化することができる。 According to the press-fitting bolt of the present invention, when the press-fitting bolt is press-fitted into the base material between the screw part and the knurl forming part, the extra diameter of the base material is absorbed, and the knurled diameter is larger than the diameter of the thread part. By forming a step portion having the same diameter as the diameter of the valley of the formation portion or a diameter smaller than that, it is possible to absorb the surplus material of the base material by this step portion, and the head portion that becomes the seating surface of the nut The surface of the base material on the opposite side can be prevented from becoming rough, and the diameter of the knurled portion can be set to a diameter that can obtain the necessary fixing strength for the base material of the bolt. Thus, since it is not necessary to provide a caulking portion, the processing apparatus can be reduced in size.
　また、前記段部の端面に環状の凹溝を形成することにより、この凹溝によって母材の余肉を確実に吸収することができ、ナットの着座面となる頭部の反対側の母材の表面が荒れることを防止することができる。 Further, by forming an annular groove on the end surface of the stepped portion, the groove can surely absorb the surplus of the base material, and the base material on the opposite side of the head serving as the seating surface of the nut. It is possible to prevent the surface of the substrate from becoming rough.
本発明の圧入ボルトの第１実施例を示す説明図である。It is explanatory drawing which shows 1st Example of the press-fitting bolt of this invention. 同圧入ボルトの素材の説明図である。It is explanatory drawing of the raw material of the same press-fitting bolt. 同圧入ボルトを母材に固定する工程の説明図である。It is explanatory drawing of the process of fixing the press-fitting bolt to a base material. 同圧入ボルトの具体的な実施例を示す正面図である。It is a front view which shows the specific Example of the press-fitting bolt. 同背面図である。It is the same rear view. 同左側面図である。It is the left side view. 同右側面図である。It is the same right view. 同平面図である。It is the same top view. 同底面図である。It is the bottom view. 図４－５のＡ－Ａ線断面図である。FIG. 6 is a cross-sectional view taken along line AA in FIG. 4-5. 本発明の圧入ボルトの第２実施例を示す説明図である。It is explanatory drawing which shows 2nd Example of the press-fitting bolt of this invention. 同圧入ボルトを母材に固定する工程の説明図である。It is explanatory drawing of the process of fixing the press-fitting bolt to a base material. 同圧入ボルトの具体的な実施例を示す正面図である。It is a front view which shows the specific Example of the press-fitting bolt. 同背面図である。It is the same rear view. 同左側面図である。It is the left side view. 同右側面図である。It is the same right view. 同平面図である。It is the same top view. 同底面図である。It is the bottom view. 図７－５のＡ－Ａ線断面図である。FIG. 6 is a cross-sectional view taken along line AA in FIG. 7-5.
　以下、本発明の圧入ボルトの実施の形態を、図面に基づいて説明する。 Hereinafter, embodiments of the press-fitting bolt of the present invention will be described with reference to the drawings.
　図１～図３に、本発明の圧入ボルトの第１実施例を示す。
　この圧入ボルト１は、図１に示すように、頭部１１と、ねじ部１２と、ねじ部１２の基部側に形成され、母材２に形成された下孔２１に圧入することにより母材２に固定されるローレット形成部１３とを備えた圧入ボルトにおいて、ねじ部１２とローレット形成部１３の間に、圧入ボルト１を母材２に圧入したときに母材２の余肉を吸収する、ねじ部１２の山の直径Ｄ１２より大径で、ローレット形成部１３の谷の直径Ｄ１３と同径又はそれより小径の直径Ｄ１４を有する段部１４を形成するようにしている。 1 to 3 show a first embodiment of the press-fitting bolt of the present invention.
As shown in FIG. 1, the press-fitting bolt 1 is formed on the base 11 by being press-fitted into a head 11, a screw part 12, and a base hole 21 formed in the base material 2. In the press-fitting bolt provided with the knurled part 13 fixed to 2, when the press-fitted bolt 1 is press-fitted into the base material 2 between the screw part 12 and the knurled part 13, the surplus of the base material 2 is absorbed. A step portion 14 having a diameter D14 larger than the diameter D12 of the crest of the screw portion 12 and having the same diameter as that of the valley D13 of the knurling formation portion 13 or smaller than that is formed.
　この場合、ローレット形成部１３の高さＨ１３と段部１４の高さＨ１４を合計した高さが、母材２の肉厚Ｈ２より小さくなるように、また、段部１４の直径Ｄ１４が、母材２の下孔２１の直径Ｄ２１より若干小さくなるように、それぞれ設定するようにする。 In this case, the total height of the height H13 of the knurling portion 13 and the height H14 of the stepped portion 14 is smaller than the thickness H2 of the base material 2, and the diameter D14 of the stepped portion 14 is Each is set so as to be slightly smaller than the diameter D21 of the lower hole 21 of the material 2.
　また、段部１４は、均一な直径に形成するほか、本実施例に示すように、ローレット形成部１３側の直径が大きく、ねじ部１２側の直径が小さい、円錐台形状に形成することが好ましく、これにより、母材２の余肉の流れを円滑にできる。 Further, in addition to forming the stepped portion 14 to have a uniform diameter, as shown in the present embodiment, the stepped portion 14 may be formed in a truncated cone shape having a large diameter on the knurled portion 13 side and a small diameter on the screw portion 12 side. Preferably, this makes it possible to smoothly flow the surplus of the base material 2.
　この圧入ボルト１は、好ましくは、丸棒を鍛造成形することにより得ることができる。
　具体的には、図２（ａ）に示すように、素材となる丸棒１Ａを鍛造成形することにより、図２（ｂ）に示すように、鍔部１１Ｂを有する中間素材１Ｂを得た後、図２（ｃ）に示すように、鍔部１１Ｂにローレット形成部１３及び段部１４を鍛造成形し、その後、図２（ｄ）に示すように、頭部１１を鍛造成形することにより得ることができる。
　なお、ねじ部１２は、転造等の公知の方法により形成することができる。 This press-fitting bolt 1 can be preferably obtained by forging a round bar.
Specifically, as shown in FIG. 2 (a), by forging a round bar 1A as a material, after obtaining an intermediate material 1B having a flange 11B as shown in FIG. 2 (b). As shown in FIG. 2 (c), the knurled portion 13 and the stepped portion 14 are forged and formed in the flange portion 11B, and then the head 11 is forged as shown in FIG. 2 (d). be able to.
The threaded portion 12 can be formed by a known method such as rolling.
　次に、図３に、上記圧入ボルト１を母材２に固定する工程を示す。
　まず、図３（ａ）に示すように、母材２に形成された下孔２１に圧入ボルト１を設置する。
　このとき、母材２の下に、受け側のダイス３を設置する。
　受け側のダイス３には、圧入ボルト１のねじ部１２を受け入れるための孔３１が形成されている。
　この孔３１は、その直径Ｄ３１を圧入ボルト１のねじ部１２の山の直径Ｄ１２より若干大径に形成することが好ましく、これにより、圧入ボルト１の位置決めを行うことができるようにしている。 Next, FIG. 3 shows a step of fixing the press-fitting bolt 1 to the base material 2.
First, as shown in FIG. 3A, the press-fitting bolt 1 is installed in the prepared hole 21 formed in the base material 2.
At this time, the receiving die 3 is installed under the base material 2.
A hole 31 for receiving the threaded portion 12 of the press-fitting bolt 1 is formed in the receiving die 3.
The hole 31 is preferably formed so that its diameter D31 is slightly larger than the diameter D12 of the threaded portion 12 of the press-fitting bolt 1 so that the press-fitting bolt 1 can be positioned.
　次に、図３（ｂ）に示すように、受け側のダイス３により母材２を支持した状態で、圧入ボルト１の頭部１１を押圧部材（図示省略）により押圧することにより、圧入ボルト１を母材２に圧入する。 Next, as shown in FIG. 3B, the press-fitting bolt 1 is pressed by pressing the head 11 of the press-fitting bolt 1 with a pressing member (not shown) while the base material 2 is supported by the receiving die 3. 1 is pressed into the base material 2.
　圧入ボルト１の母材２への圧入が進行すると、図３（ｃ）のＡに示すように、ローレット形成部１３の進行方向前面に母材２の余肉がバリとなって発生するが、発生したバリは、段部１４の端面側に回り込み、吸収される。 When the press-fitting of the press-fitting bolt 1 into the base material 2 progresses, as shown in A of FIG. 3C, the surplus of the base material 2 is generated as burrs on the front surface in the direction of travel of the knurled portion 13, The generated burrs go around to the end face side of the step portion 14 and are absorbed.
　そして、圧入ボルト１の母材２への圧入が完了した状態では、図３（ｄ）に示すように、発生したバリは、受け側のダイス３と段部１４の間に完全に吸収され、当該箇所の表面は、母材２の表面と面一（又は母材２の表面より窪んだ状態）となる。 Then, in the state where the press-fitting of the press-fitting bolt 1 into the base material 2 is completed, the generated burrs are completely absorbed between the receiving die 3 and the stepped portion 14 as shown in FIG. The surface of the part is flush with the surface of the base material 2 (or in a state of being recessed from the surface of the base material 2).
　このように、段部１４によって母材２の余肉を吸収することができ、ナットの着座面となる母材２の表面が発生するバリによって荒れることを防止することができ、また、圧入ボルト１のローレット形成部１３の圧入によっては、母材２の表面に圧入痕が現れにくいことと相俟って、ナットの着座面となる母材２の表面を平坦に維持することができる。
　また、ローレット形成部１３と段部１４の直径を独自に設定できることから、ローレット形成部１３の直径を、圧入ボルト１の母材２に対する必要な固定強度を得ることができる直径に設定することができ、従来の圧入ボルトのようにかしめ部を設ける必要がないため、加工装置を小型化することができる。 Thus, the step 14 can absorb the surplus of the base material 2 and can prevent the surface of the base material 2 serving as the seating surface of the nut from being roughened by burrs, and the press-fitting bolt. Depending on the press-fitting of the knurled portion 13, the surface of the base material 2 that serves as the seating surface of the nut can be kept flat, in combination with the fact that the press-fitting marks are less likely to appear on the surface of the base material 2.
Moreover, since the diameters of the knurl forming portion 13 and the stepped portion 14 can be set independently, the diameter of the knurl forming portion 13 can be set to a diameter capable of obtaining a necessary fixing strength with respect to the base material 2 of the press-fitting bolt 1. In addition, since it is not necessary to provide a caulking portion unlike a conventional press-fitting bolt, the processing apparatus can be reduced in size.
　そして、この圧入ボルト１は、上記の特性を有することから、銅や鉄等の比較的硬度の高い金属製の母材に好適に用いることができる。 And since this press-fit bolt 1 has the above-mentioned characteristics, it can be suitably used for a metal base material having a relatively high hardness such as copper or iron.
　図４－１～図４－７に、この圧入ボルト１のより具体的な実施例を示す。 4-1 to 4-7 show more specific examples of the press-fitting bolt 1.
　図５～図６に、本発明の圧入ボルトの第２実施例を示す。
　この圧入ボルト１は、図５に示すように、頭部１１と、ねじ部１２と、ねじ部１２の基部側に形成され、母材２に形成された下孔２１に圧入することにより母材２に固定されるローレット形成部１３とを備えた圧入ボルトにおいて、ねじ部１２とローレット形成部１３の間に、圧入ボルト１を母材２に圧入したときに母材２の余肉を吸収する、ねじ部１２の山の直径Ｄ１２より大径で、ローレット形成部１３の谷の直径Ｄ１３と同径又はそれより小径の直径Ｄ１４を有する段部１４を形成し、さらに、段部１４の端面に環状の凹溝１４ａを形成するようにしている。 5 to 6 show a second embodiment of the press-fitting bolt of the present invention.
As shown in FIG. 5, the press-fitting bolt 1 is formed on the base 11 by forming a head 11, a screw 12, and a base 21 of the screw 12, and press-fitting into a lower hole 21 formed in the base 2. In the press-fitting bolt provided with the knurled part 13 fixed to 2, when the press-fitted bolt 1 is press-fitted into the base material 2 between the screw part 12 and the knurled part 13, the surplus material of the base material 2 is absorbed. A step portion 14 having a diameter D14 larger than the diameter D12 of the crest of the screw portion 12 and having the same diameter as that of the valley D13 of the knurling formation portion 13 or a diameter D14 smaller than that is formed. An annular groove 14a is formed.
　次に、図６に、上記圧入ボルト１を母材２に固定する工程を示す。
　なお、本実施例においては、母材２に形成する下孔２１の形状を、均一な孔径ではなく、ナットの着座面側を絞った形状に形成するようにしているが、これにより、ナットの着座面となる母材２の表面が荒れることを防止することができる。
　この工程は、第１実施例の圧入ボルト１と基本的には同様であるが、本実施例の圧入ボルト１は、段部１４の端面に環状の凹溝１４ａを形成するようにしているので、ローレット形成部１３の進行方向前面に発生するバリを、この凹溝１４ａによって確実に吸収することができ、ナットの着座面となる母材２の表面が発生するバリによって荒れることをより確実に防止することができる。 Next, FIG. 6 shows a step of fixing the press-fitting bolt 1 to the base material 2.
In the present embodiment, the shape of the lower hole 21 formed in the base material 2 is not a uniform hole diameter, but a shape in which the seating surface side of the nut is narrowed. It can prevent that the surface of the base material 2 used as a seating surface becomes rough.
This process is basically the same as the press-fitting bolt 1 of the first embodiment, but the press-fitting bolt 1 of this embodiment forms an annular concave groove 14a on the end face of the stepped portion 14. The burrs generated on the front surface in the advancing direction of the knurled portion 13 can be reliably absorbed by the concave grooves 14a, and the burrs generated on the surface of the base material 2 serving as the seating surface of the nut are more reliably damaged. Can be prevented.
　そして、この圧入ボルト１は、上記の特性を有することから、アルミニウム等の比較的硬度の低い金属製の母材に好適に用いることができる。 And since this press-fit bolt 1 has the above-mentioned characteristics, it can be suitably used for a metal base material having a relatively low hardness such as aluminum.
　図７－１～図７－７に、この圧入ボルト１のより具体的な実施例を示す。 FIGS. 7-1 to 7-7 show more specific examples of the press-fitting bolt 1.
　なお、本実施例の圧入ボルト１のその他の構成及び作用は、第１実施例の圧入ボルト１と同様である。 In addition, the other structure and effect | action of the press-fit bolt 1 of a present Example are the same as that of the press-fit bolt 1 of 1st Example.
　以上、本発明の圧入ボルトについて、複数の実施例に基づいて説明したが、本発明は上記実施例に記載した構成に限定されるものではなく、その趣旨を逸脱しない範囲において適宜その構成を変更することができるものである。 As mentioned above, although the press-fitting bolt of the present invention has been described based on a plurality of embodiments, the present invention is not limited to the configurations described in the above-described embodiments, and the configuration is appropriately changed without departing from the spirit thereof. Is something that can be done.
　本発明の圧入ボルトは、かしめ部を設けることなくボルトの母材に対する大きな固定強度を得ることができるとともに、ナットの着座面となる頭部の反対側の母材の表面が荒れることがないという特性を有していることから、鉄、銅、アルミニウム等の各種の金属製の母材にボルトを植設する用途に好適に用いることができる。 The press-fitting bolt of the present invention can obtain a large fixing strength with respect to the base material of the bolt without providing a caulking portion, and the surface of the base material on the side opposite to the head serving as the seating surface of the nut is not roughened. Since it has the characteristic, it can be used suitably for the use which implants a bolt in various metal base materials, such as iron, copper, and aluminum.
　１　　圧入ボルト
　１１　頭部
　１２　ねじ部
　１３　ローレット形成部
　１４　段部
　１４ａ　凹溝
　２　　母材
　２１　下孔 DESCRIPTION OF SYMBOLS 1 Press-fit bolt 11 Head 12 Screw part 13 Knurled part 14 Step part 14a Concave groove 2 Base material 21 Pilot hole

Claims (2)

  1. 　頭部と、ねじ部と、該ねじ部の基部側に形成され、母材に形成された下孔に圧入することにより母材に固定されるローレット形成部とを備えた圧入ボルトにおいて、前記ねじ部とローレット形成部の間に、圧入ボルトを母材に圧入したときに母材の余肉を吸収する、ねじ部の山の直径より大径で、ローレット形成部の谷の直径と同径又はそれより小径の直径を有する段部を形成したことを特徴とする圧入ボルト。 In the press-fitting bolt comprising a head, a screw part, and a knurl forming part formed on the base side of the screw part and fixed to the base material by press-fitting into a prepared hole formed in the base material. When the press-fitted bolt is press-fitted into the base material between the part and the knurl forming part, it absorbs the surplus of the base material and has a diameter larger than the diameter of the thread part ridge, or the same diameter as the valley diameter of the knurled part or A press-fitting bolt characterized in that a step portion having a smaller diameter is formed.
  2. 　前記段部の端面に環状の凹溝を形成してなることを特徴とする請求項１記載の圧入ボルト。 The press-fitting bolt according to claim 1, wherein an annular groove is formed on an end surface of the stepped portion.
PCT/JP2013/061160 2012-08-23 2013-04-15 Press-fitted bolt WO2014030386A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012-184365 2012-08-23
JP2012184365A JP2014040895A (en) 2012-08-23 2012-08-23 Press-in bolt

Publications (1)

Publication Number Publication Date
WO2014030386A1 true WO2014030386A1 (en) 2014-02-27

Family

ID=50149706

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2013/061160 WO2014030386A1 (en) 2012-08-23 2013-04-15 Press-fitted bolt

Country Status (2)

Country Link
JP (1) JP2014040895A (en)
WO (1) WO2014030386A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017155860A (en) * 2016-03-02 2017-09-07 株式会社青山製作所 Caulking bolt

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5981008B1 (en) * 2015-09-25 2016-08-31 有限会社藤▲崎▼鋲螺 Bolts and nuts

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5728003B2 (en) * 1975-09-26 1982-06-14
JPH11336728A (en) * 1998-05-28 1999-12-07 Namitei Kk Driving bolt
JP2002115442A (en) * 2000-10-06 2002-04-19 Keigo Horikoshi Bolt or pin, and hinge stay for storage using the same
JP2007247736A (en) * 2006-03-15 2007-09-27 Tokai Rubber Ind Ltd Bolt fixing construction
JP2007321787A (en) * 2006-05-30 2007-12-13 Bosch Corp Stud bolt and booster using the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5728003B2 (en) * 1975-09-26 1982-06-14
JPH11336728A (en) * 1998-05-28 1999-12-07 Namitei Kk Driving bolt
JP2002115442A (en) * 2000-10-06 2002-04-19 Keigo Horikoshi Bolt or pin, and hinge stay for storage using the same
JP2007247736A (en) * 2006-03-15 2007-09-27 Tokai Rubber Ind Ltd Bolt fixing construction
JP2007321787A (en) * 2006-05-30 2007-12-13 Bosch Corp Stud bolt and booster using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017155860A (en) * 2016-03-02 2017-09-07 株式会社青山製作所 Caulking bolt

Also Published As

Publication number Publication date
JP2014040895A (en) 2014-03-06

Similar Documents

Publication Publication Date Title
JP5083396B2 (en) Fastening screw manufacturing method
US8939689B2 (en) Functional element in the form of a press-in element
US10655666B2 (en) Caulking bolt
JP5219095B2 (en) Insert and insert manufacturing method
JP4787295B2 (en) Screw fastening structure with high-strength self-forming screws
US8770903B2 (en) Thread-producing nut, blank for the fabrication of said nut, and bolted joint composed of said nut and a bolt
JP6437313B2 (en) Locking special double nut
US8899898B2 (en) Screw method for forming a screw thread
JP6123082B2 (en) Piercing nut for high-strength steel sheet
JP4579943B2 (en) Flat washer crimp bolt and its manufacturing method
WO2014030386A1 (en) Press-fitted bolt
JP4361511B2 (en) Boss member and manufacturing method of boss member
US10760610B2 (en) Fastener
JP2007170645A (en) Insert nut and work fastening structure
JP2009257512A (en) Assembly type crankshaft and its method for manufacturing
JP2007292131A (en) Screw with female screw forming function
FR2997326A1 (en) METHOD OF MANUFACTURING THE THREADING OF A NUT NUT AND TAPPER NUT SYSTEM BY DEFORMATION THEREFOR
JP3810001B2 (en) Insert parts
JP2013160298A (en) Fastening structure between metal part and bolt, and method of manufacturing the same
JP7296645B2 (en) Manufacturing method of slit nut
JP2009250352A (en) Caulking screw, and manufacturing method and joining structure thereof
JP5036238B2 (en) Manufacturing method of screw member
JP4673730B2 (en) Boss member and manufacturing method of boss member
JP4481843B2 (en) Boss member manufacturing method
JP2012077837A (en) Bolt, screw roll-forming die, and roll-forming method of bolt

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13830768

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13830768

Country of ref document: EP

Kind code of ref document: A1