JP3190264B2 - Manufacturing method of T nut - Google Patents
Manufacturing method of T nutInfo
- Publication number
- JP3190264B2 JP3190264B2 JP21167696A JP21167696A JP3190264B2 JP 3190264 B2 JP3190264 B2 JP 3190264B2 JP 21167696 A JP21167696 A JP 21167696A JP 21167696 A JP21167696 A JP 21167696A JP 3190264 B2 JP3190264 B2 JP 3190264B2
- Authority
- JP
- Japan
- Prior art keywords
- thickness
- female screw
- base
- nut
- outer diameter
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Landscapes
- Forging (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明はＴナットの製造方
法に関わり、特に雌ねじ形成部分の一端に外方へ向くフ
ランジ部を備え、他端に肉厚が比較的薄くされたかしめ
予定部分を備えるＴナットの製造方法に関するものであ
る。TECHNICAL FIELD The present invention relates to a method for producing a T nut, in particular a flange portion facing outward at one end of the female screw forming portion, a caulked portion thickness is relatively thin at the other end The present invention relates to a method for manufacturing a T nut provided.
【０００２】[0002]
【従来の技術】従来のＴナットの製造方法として特開平
７−１１６７６９号公報に示すものが提案されている。
この製造方法は、帯状金属板を用意しフランジ部となる
べき部分を前記金属板上に決め、前記金属板の前記フラ
ンジ部となるべき部分の中心部を当該金属板の一方主面
側へ膨出させることにより、Ｔナットの軸部となるべき
膨出部を形成する。次に、前記膨出部の先端面部に貫通
孔を設け、前記膨出部の前記かしめ予定部分に相当する
先端部の外径を前記雌ねじ形成部分に相当する基部の外
径に比べて比較的小さくすることにより前記先端部の肉
厚を前記基部の肉厚より薄くする。次いで、前記基部の
肉厚をほぼ維持しながら、その外径及び内径を縮め、前
記膨出部の基部の内周面上に雌ねじを形成する。2. Description of the Related Art As a conventional method for manufacturing a T-nut, a method disclosed in Japanese Patent Application Laid-Open No. Hei 7-116679 has been proposed.
In this manufacturing method, a strip-shaped metal plate is prepared, a portion to be a flange portion is determined on the metal plate, and a center portion of the metal plate to be a flange portion is expanded toward one principal surface of the metal plate. By projecting, a bulging portion to be a shaft portion of the T-nut is formed. Next, a through hole is provided in the distal end surface portion of the bulging portion, and the outer diameter of the distal end portion corresponding to the portion to be swaged of the bulging portion is relatively smaller than the outer diameter of the base portion corresponding to the female screw forming portion. By reducing the thickness, the thickness of the tip portion is made smaller than the thickness of the base portion. Next, the outer diameter and the inner diameter of the base portion are reduced while substantially maintaining the thickness of the base portion, and a female screw is formed on the inner peripheral surface of the base portion of the bulging portion.
【０００３】[0003]
【発明が解決しようとする課題】ところが、上記従来の
Ｔナットの製造方法には２つの問題があった。前記軸部
となるべき膨出部を形成し、その後、前記膨出部の先端
面部に貫通孔を設けるという工程をとっているので、貫
通孔の形成の際に一部の材料が捨てられる。このため、
かしめ予定部分の成型時にその長さを十分に確保するこ
とができず、また、肉厚の厚い膨出部に前記貫通孔を形
成するので、打ち抜きに要する動力損失及び金型の摩耗
が増進され、材料費の無駄を強いられるという問題があ
る。However, the conventional method of manufacturing a T-nut has two problems. Since a step of forming a bulging portion to be the shaft portion and then providing a through-hole in the tip end portion of the bulging portion is performed, a part of the material is discarded at the time of forming the through-hole. For this reason,
When molding the portion to be swaged, the length cannot be sufficiently secured, and the through hole is formed in the thick bulging portion, so that power loss required for punching and wear of the mold are increased. However, there is a problem that material costs are wasted.
【０００４】また、従来の製造方法においては、基部の
肉厚をほぼ維持しながら、その外径及び内径を縮めると
いう工程を有しているので、基部の内周面上に雌ねじを
形成した場合、該基部の実質的な肉厚が低下し、その機
械的強度が低下する。このため、雌ねじにボルトを螺合
し張力を付与した場合、基部の変形を防止することが困
難であるという問題があった。Further, the conventional manufacturing method has a step of reducing the outer diameter and the inner diameter of the base while maintaining the thickness of the base substantially, so that the female screw is formed on the inner peripheral surface of the base. The substantial thickness of the base is reduced, and the mechanical strength is reduced. For this reason, when a bolt is screwed into the female screw to apply tension, there is a problem that it is difficult to prevent deformation of the base.
【０００５】また、上記問題を解決するため、元々肉厚
の十分な帯状金属板を使用することもできるが、この場
合には、肉厚をそれほど要しないフランジ部あるいはか
しめ予定部分の肉厚が余分になり、材料費の無駄あるい
はかしめ予定部分の絞り加工時に肉厚をより薄くするた
めの余計な動力を要するという問題があった。In order to solve the above problem, a strip-shaped metal plate having a sufficient thickness can be used. However, in this case, the thickness of the flange portion or the portion to be swaged which does not require much thickness is reduced. There is a problem that it becomes excessive, wastes material costs, or requires extra power to make the wall thickness thinner at the time of drawing at a portion to be swaged.
【０００６】[0006]
【０００７】[0007]
【０００８】この発明の目的は上記従来の技術に存する
問題点を解消して、機械的強度を高めることができると
ともに、材料費用を節減でき、製造を容易に行うことが
できるＴナットの製造方法を提供することにある。[0008] The purpose of the present invention resides in the above-mentioned prior art
It is an object of the present invention to provide a method for manufacturing a T-nut which can solve the problems , increase the mechanical strength, reduce the material cost, and can easily manufacture the T-nut.
【０００９】[0009]
【００１０】[0010]
【００１１】[0011]
【課題を解決するための手段】 請求項１記載の発明は上
記目的を達成するため、金属板にフランジ部（１３）と
なる部分を残し、その中心部を該金属板の一方向へ膨出
させ、この膨出部（２３）の前記かしめ予定部分（１
４）に相当する先端部（２５）の外径（ｄ３´）を前記
雌ねじ形成部分（１５）に相当する基部（２４）の外径
（ｄ１´）と比べて比較的小さくすることにより、前記
先端部（２５）の肉厚（ｔ３´）を前記基部（２４）の
肉厚（ｔ２´）より薄くし、次いで、かしめ予定部分
（１４）に相当する先端部（２５）に貫通孔（２６）を
設け、前記基部（２４）の肉厚（ｔ２´）を増大しつ
つ、その外径（ｄ１´）及び内径（ｄ２´）を縮小し、
前記基部（２４）の内周面上に雌ねじ（１６）を形成す
る各工程を備えている。 According to the first aspect of the present invention,
To achieve serial purposes, leaving a portion to be a flange portion (13) to a metal plate, is bulged its central portion in one direction of the metal plate, the caulked portion of the expanded portion (23) ( 1
By making the outer diameter (d3 ') of the distal end portion (25) corresponding to 4) relatively smaller than the outer diameter (d1') of the base portion (24) corresponding to the female screw forming portion (15), The thickness (t3 ′) of the tip (25) is made smaller than the thickness (t2 ′) of the base (24), and then the through-hole (26) is formed in the tip (25) corresponding to the portion (14) to be swaged. ) To reduce the outer diameter (d1 ′) and inner diameter (d2 ′) of the base (24) while increasing the thickness (t2 ′) of the base (24),
The method includes the steps of forming a female screw (16) on the inner peripheral surface of the base (24).
【００１２】請求項２記載の発明は、請求項１におい
て、前記フランジ部（１３）の基部（２４）と反対側外
周縁に面取部（１３１）を形成する工程を備えている。According to a second aspect of the present invention, in the first aspect , a step of forming a chamfered portion (131) on the outer peripheral edge of the flange portion (13) on the side opposite to the base portion (24) is provided.
【００１３】[0013]
【発明の実施の形態】以下、この発明のＴナット及びそ
の製造方法を具体化した一実施形態を説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a T-nut and a method for manufacturing the same according to the present invention will be described below.
【００１４】図１及び図７に示すようにＴナット１１は
軸部１２とその一端部に形成したフランジ部１３とから
構成されている。前記軸部１２は上部に位置するかしめ
予定部分１４と、下部に位置する雌ねじ形成部分１５と
により一体に形成されている。前記雌ねじ形成部分１５
の内周面には雌ねじ１６が形成され、さらに前記フラン
ジ部１３の外周には９０°ごとに爪１７が上方に指向す
るようにプレス成形されている。As shown in FIGS. 1 and 7, the T nut 11 comprises a shaft portion 12 and a flange portion 13 formed at one end thereof. The shaft portion 12 is integrally formed with a portion to be caulked 14 located at an upper portion and a female screw forming portion 15 located at a lower portion. The internal thread forming portion 15
A female screw 16 is formed on the inner peripheral surface of the flange 13, and a claw 17 is press-formed on the outer periphery of the flange portion 13 so as to point upward at every 90 °.
【００１５】このように形成されたＴナット１１は、図
示しないガイドレールの案内溝にフランジ部１３の外周
一部を係合した状態で目的の場所にその自重あるいは外
力等により移動される。The T-nut 11 thus formed is moved to a target location by its own weight or an external force while a part of the outer periphery of the flange portion 13 is engaged with a guide groove of a guide rail (not shown).
【００１６】また、Ｔナット１１は図８に示すように例
えば木材等の被取付け体１８に形成した挿入孔に対し軸
部１２を挿入し、爪１７を被取付け体１８に打ち込み、
その後かしめ予定部分１４をかしめ器により変形させて
被取付け体１８側に押圧し、被取付け体１８にＴナット
１１を取付ける。この状態で、前記雌ねじ１６に図示し
ないボルトを螺合し、ボルトの頭部と被取付け体１８と
の間に例えばシート等を挟着固定することができる。As shown in FIG. 8, the T-nut 11 is formed by inserting the shaft portion 12 into an insertion hole formed in an attached body 18 made of, for example, wood, and driving a claw 17 into the attached body 18.
Thereafter, the portion to be swaged 14 is deformed by a swaging device and pressed against the attached body 18, and the T nut 11 is attached to the attached body 18. In this state, a bolt (not shown) is screwed into the female screw 16, and for example, a sheet or the like can be sandwiched and fixed between the head of the bolt and the attached body 18.
【００１７】この実施形態では、図２に示すように前記
雌ねじ形成部分１５の外径をｄ１、同内径をｄ２、かし
め予定部分１４の外径をｄ３、同内径をｄ４とすると、 ｄ１＝ｄ３＞ｄ４＞ｄ２ の不等式が成立するように各部の寸法を設定している。In this embodiment, as shown in FIG. 2, when the outer diameter of the female screw forming portion 15 is d1, the inner diameter is d2, the outer diameter of the portion 14 to be swaged is d3, and the inner diameter is d4, d1 = d3 The dimensions of each part are set so that the inequality expression>d4> d2 holds.
【００１８】この実施形態では、前記フランジ部１３の
肉厚をｔ１、雌ねじ形成部分１５の肉厚をｔ２、かしめ
予定部１４の肉厚をｔ３、雌ねじ１６のねじ溝底部と対
応する雌ねじ形成部分１５の肉厚をｔ４とすると、 ｔ２＞ｔ１＞ｔ４＞ｔ３ の不等式が成立するように各部の寸法を設定している。In this embodiment, the thickness of the flange portion 13 is t1, the thickness of the female screw forming portion 15 is t2, the thickness of the portion 14 to be swaged is t3, and the female screw forming portion corresponding to the thread groove bottom of the female screw 16. Assuming that the thickness of No. 15 is t4, the dimensions of each part are set so that the inequality of t2>t1>t4> t3 is satisfied.
【００１９】次に、Ｔナット１１の製造方法を図３〜図
６に基づいて説明する。まず、図３に示すように、帯状
の金属板２１をプレスにより円盤状に打ち抜き円形基板
２２を形成する。Next, a method of manufacturing the T-nut 11 will be described with reference to FIGS. First, as shown in FIG. 3, a strip-shaped metal plate 21 is stamped into a disk shape by pressing to form a circular substrate 22.
【００２０】次に、円形基板２２を図４に示すように数
回に分けて絞り成型を繰り返し行って、全体の肉厚がほ
ぼ均一なフランジ部１３と膨出部２３とを形成する。次
に、図５（ａ）に示すように膨出部２３に対し、フラン
ジ部１３側の肉厚の大きい雌ねじ形成部分１５となる基
部２４と、基部２４の上部に位置してかしめ予定部分１
４となる先端部２５とを成型する。Next, as shown in FIG. 4, the circular substrate 22 is repeatedly drawn and formed several times to form the flange portion 13 and the bulging portion 23 having substantially uniform thicknesses as a whole. Next, as shown in FIG. 5A, the base 24 which becomes the thicker female screw forming portion 15 on the flange 13 side with respect to the bulging portion 23, and the portion 1 to be swaged which is located above the base 24.
Then, a tip portion 25 serving as No. 4 is formed.
【００２１】次に、図５（ｂ）に示すように先端部２５
の上端面をプレスにより打ち抜き形成し貫通孔２６を成
型する。さらに、図５（ｃ）に示すように前記基部２４
の外周面を内方に押圧しつつ該基部２４の肉厚をフラン
ジ部１３の肉厚よりも増大し、外径及び内径を縮小す
る。この工程により基部２４の外径と先端部２５の外径
が均一となる。Next, as shown in FIG.
Is punched out by press to form a through hole 26. Further, as shown in FIG.
The wall thickness of the base portion 24 is made larger than the wall thickness of the flange portion 13 while pressing the outer peripheral surface inward, and the outer diameter and the inner diameter are reduced. By this step, the outer diameter of the base portion 24 and the outer diameter of the distal end portion 25 become uniform.
【００２２】次に、図５（ｄ）に示すように、フランジ
部１３の外周縁を円形にプレス成形し、ここで該フラン
ジ部１３の外周縁の下部外周縁をテーパ状の成型型（図
示略）に押圧して面取部１３１を成型する。Next, as shown in FIG. 5 (d), the outer peripheral edge of the flange portion 13 is press-formed into a circle, and the lower outer peripheral edge of the outer peripheral edge of the flange portion 13 is formed into a tapered mold (not shown). (Not shown) to form the chamfered portion 131.
【００２３】その後、図５（ｅ）に示すようにフランジ
部１３の外周に爪１７をプレス成型する。さらに、前記
雌ねじ形成部分１５に雌ねじ１６が形成されてＴナット
１１の製造が完了する。Thereafter, as shown in FIG. 5E, a claw 17 is press-formed on the outer periphery of the flange portion 13. Further, the female screw 16 is formed in the female screw forming portion 15, and the manufacture of the T nut 11 is completed.
【００２４】次に、本発明の要部である図５（ａ）〜
（ｃ）の工程を図６（ａ）〜（ｃ）により詳細に説明す
る。図６（ａ）に示すように成型ダイ２７とクランプダ
イ２８との間にフランジ部１３がクランプされた状態で
ノックアウト２９が膨出部２３の上端面に当接しながら
ポンチ３３が膨出部２３の内周側に突入される。成型ダ
イ２７には雌ねじ形成部分１５となる基部２４を成型す
る大径の鍛造面３６、この鍛造面３６に連なり小径のテ
ーパ鍛造面３７及びこのテーパ鍛造面３７に連なり、か
つかしめ予定部分１４となる先端部２５を成型する円筒
状をなす鍛造面３８が設けられている。Next, FIG. 5A to FIG.
The step (c) will be described in detail with reference to FIGS. As shown in FIG. 6 (a), the punch 33 presses the bulge 23 while the knockout 29 abuts on the upper end surface of the bulge 23 with the flange 13 clamped between the molding die 27 and the clamp die 28. Rushed into the inner circumference of The molding die 27 has a large-diameter forged surface 36 for molding the base portion 24 serving as the female screw forming portion 15, a small-diameter tapered forging surface 37 connected to the forged surface 36 and a small-diameter tapered forged surface 37. A forged surface 38 having a cylindrical shape for molding the tip portion 25 is provided.
【００２５】図６（ｂ）においては先端部２５の上端面
にノックアウト２９が除去された状態で、ダイ３０が設
置され、膨出部２３の内部からポンチ３４が上方に移動
されて先端部２５の上部に貫通孔２６が形成される。In FIG. 6B, the die 30 is set with the knockout 29 removed from the upper end surface of the tip 25, and the punch 34 is moved upward from the inside of the bulging portion 23 so that the tip 25 is removed. A through hole 26 is formed in the upper part of.
【００２６】前記雌ねじ形成部分１５の外径ｄ１、同内
径ｄ２、かしめ予定部分１４の外径ｄ３、同内径ｄ４、
前記フランジ部１３の肉厚ｔ１、雌ねじ形成部分１５の
肉厚ｔ２及びかしめ予定部１４の肉厚ｔ３とそれぞれ対
応する図６における各部の寸法は、同じ符号に「´」を
付して示している。The outer diameter d1 and the inner diameter d2 of the female screw forming portion 15, the outer diameter d3 and the inner diameter d4 of the portion 14 to be swaged,
The dimensions of the respective portions in FIG. 6 corresponding to the thickness t1 of the flange portion 13, the thickness t2 of the female screw forming portion 15, and the thickness t3 of the portion to be swaged 14, respectively, are denoted by the same reference numerals with “′”. I have.
【００２７】図６（ａ），（ｂ）に示す工程では、前記
膨出部２３の前記かしめ予定部分１４に相当する先端部
２５の外径ｄ３´を前記雌ねじ形成部分１５に相当する
基部２４の外径ｄ１´と比べて比較的小さくすることに
より、前記先端部２５の肉厚ｔ３´を前記基部２４の肉
厚ｔ２´より薄くする。In the steps shown in FIGS. 6A and 6B, the outer diameter d3 'of the distal end portion 25 corresponding to the portion 14 to be swaged of the bulging portion 23 is changed to the base portion 24 corresponding to the female screw forming portion 15. By making the outer diameter d1 'relatively small, the thickness t3' of the distal end portion 25 is made smaller than the thickness t2 'of the base portion 24.
【００２８】次の工程では、図６（ｃ）に示すように基
部２４の外周面を成型ダイ２７の鍛造面３９により内方
へ押圧して該基部２４の肉厚ｔ２´を増大しながら、基
部２４の外径ｄ１´及び内径ｄ２´を、ｄ１，ｄ２へ縮
小する。なお、図６（ｃ）において前記かしめ予定部分
１５の内周面はノックアウト３１により縮径しないよう
に保持されている。In the next step, as shown in FIG. 6C, the outer peripheral surface of the base 24 is pressed inward by the forging surface 39 of the molding die 27 to increase the thickness t2 'of the base 24. The outer diameter d1 'and the inner diameter d2' of the base 24 are reduced to d1 and d2. In FIG. 6C, the inner peripheral surface of the portion 15 to be swaged is held by a knockout 31 so as not to reduce the diameter.
【００２９】ここで、前記基部２４の肉厚ｔ２´を雌ね
じ形成部分１５の肉厚ｔ２へと大きくする際の加工動作
について説明する。雌ねじ形成部分１５の外周面を成型
ダイ２７の鍛造面３９により中心側に押圧すれば、その
内周面も小径となり、雌ねじ形成部分１５の肉厚ｔ２が
増大する。しかし、雌ねじ形成部分１５の内周面を成型
するためのポンチ３５を挿入していないと、内周面の変
形が不規則になって、その影響が外周面にも現れる。こ
のため、雌ねじ形成部分１５の内周面の不規則な変形を
防止できる程度に、かつ芯出しを行うことができる程度
にポンチ３５を挿入し、雌ねじ形成部分１５の肉厚ｔ２
を増大させる。このとき、図６（ｂ）に示す基部２４の
肉厚ｔ２´と、図６（ｃ）に示す雌ねじ形成部分１５の
肉厚ｔ２との比は、雌ねじ１６を形成し易くするととも
に、雌ねじ形成部分１５の強度を高めるために例えば１
０〜３０％程度増大するように設定するのが望ましい。Here, a description will be given of a processing operation for increasing the thickness t2 'of the base 24 to the thickness t2 of the female screw forming portion 15. When the outer peripheral surface of the female screw forming portion 15 is pressed toward the center by the forging surface 39 of the molding die 27, the inner peripheral surface also has a small diameter, and the thickness t2 of the female screw forming portion 15 increases. However, if the punch 35 for molding the inner peripheral surface of the female screw forming portion 15 is not inserted, the deformation of the inner peripheral surface becomes irregular, and the effect also appears on the outer peripheral surface. For this reason, the punch 35 is inserted to such an extent that irregular deformation of the inner peripheral surface of the female screw forming portion 15 can be prevented and the centering can be performed, and the thickness t2 of the female screw forming portion 15 is increased.
Increase. At this time, the ratio of the thickness t2 'of the base portion 24 shown in FIG. 6B to the thickness t2 of the female screw forming portion 15 shown in FIG. In order to increase the strength of the portion 15, for example, 1
It is desirable to set so as to increase by about 0 to 30%.
【００３０】次に、前記のように構成したＴナット及び
その製造方法についてその作用効果を説明する。 （１） 前記実施形態ではＴナット１１の雌ねじ形成部
分１５の肉厚ｔ２をフランジ部１３の肉厚ｔ１よりも大
きく設定（ｔ２＞ｔ１）したので、雌ねじ形成部分１５
の内周面に雌ねじ１６を形成した後に、雌ねじ１６のね
じ溝底部と対応する雌ねじ形成部分１５の肉厚ｔ４を大
きくすることができ、このため雌ねじ形成部分１５の機
械的強度を向上することができる。又、雌ねじ１６を形
成する工程において、タップのセンターを雌ねじ形成部
分１５のセンターに正確に位置合わせしなくても済み、
加工作業を容易に行うことができる。 （２） 前記実施形態では、基部２４の肉厚ｔ２´に対
する雌ねじ形成部分１５の肉厚ｔ２の増加率を１０〜３
０％としたので、上述した（１）の効果を発揮すること
ができる。 （３） 前記実施形態では、ｔ４＞ｔ３に設定したの
で、最も強度の低いかしめ予定部分１４のかしめ作業時
に雌ねじ形成部分１４の変形が防止される。 （４） 前記実施形態では図６（ａ）に示すように基部
２４及び先端部２５の加工を行う際、先端部２５の上端
面、つまり頂面を残したまま先端部２５の鍛造を行うの
で、先端部２５の長さを充分確保することができる。 （５） 前記実施形態では図６（ｂ）に示すように薄い
肉厚の先端部２５の頂面をポンチ３４により打ち抜いて
貫通孔２６を形成するようしたので、貫通孔２６の打ち
抜き動作に要する動力を軽減して、成型装置の耐久性を
向上することができる。又、先端部２５の打ち抜かれた
頂面板２５１の肉厚が薄いので、材料費を低減すること
もできる。Next, the function and effect of the T-nut constructed as described above and the method of manufacturing the same will be described. (1) In the above embodiment, the thickness t2 of the female thread forming portion 15 of the T-nut 11 is set to be larger than the thickness t1 of the flange portion 13 (t2> t1).
After the female screw 16 is formed on the inner peripheral surface of the female screw 16, the thickness t4 of the female screw forming portion 15 corresponding to the thread groove bottom of the female screw 16 can be increased, and thus the mechanical strength of the female screw forming portion 15 can be improved. Can be. In the step of forming the female screw 16, the center of the tap does not need to be accurately aligned with the center of the female screw forming portion 15,
Processing operations can be easily performed. (2) In the above embodiment, the rate of increase in the thickness t2 of the female screw forming portion 15 with respect to the thickness t2 ′ of the base 24 is 10 to 3
Since it is 0%, the effect (1) described above can be exhibited. (3) In the above embodiment, since t4> t3 is set, the deformation of the female screw forming portion 14 is prevented at the time of caulking the caulking portion 14 having the lowest strength. (4) In the above embodiment, as shown in FIG. 6A, when the base 24 and the tip 25 are machined, the tip 25 is forged while leaving the upper end surface of the tip 25, that is, the top surface. The length of the distal end portion 25 can be sufficiently ensured. (5) In the above-described embodiment, as shown in FIG. 6B, the through-hole 26 is formed by punching the top surface of the thin end portion 25 with the punch 34, so the punching operation of the through-hole 26 is required. Power can be reduced, and the durability of the molding device can be improved. Further, since the thickness of the top plate 251 punched out of the tip end portion 25 is thin, the material cost can be reduced.
【００３１】なお、この発明は前記実施形態に限定され
るものではなく、次のように具体化することもできる。 （イ） 前記実施形態では帯状金属板２１から円形金属
板２２をプレス成型した後、膨出部２３を形成するよう
にしたが、帯状金属板２１に膨出部２３を順次形成し、
図５（ｃ）に示す工程を終了した後に、各軸部１２の周
りにフランジ部１３をプレス成型すること。The present invention is not limited to the above embodiment, but can be embodied as follows. (A) In the above embodiment, after the circular metal plate 22 is press-molded from the band-shaped metal plate 21, the bulging portion 23 is formed. However, the bulging portion 23 is sequentially formed on the band-shaped metal plate 21.
After the step shown in FIG. 5C is completed, the flange portion 13 is press-formed around each shaft portion 12.
【００３２】（ロ） 前記実施形態において、図６
（ａ）及び（ｃ）に示す鍛造工程をそれぞれ例えば２〜
５段階に分けて行うこと。(B) In the above embodiment, FIG.
The forging process shown in FIGS.
Do it in 5 steps.
【００３３】[0033]
【実施例】前記雌ねじ形成部分１５の外径ｄ１、同内径
ｄ２、かしめ予定部１４の外径ｄ３、同内径ｄ４を、次
のように設定する。ｄ１＝７．７ｍｍ、ｄ２＝５．１ｍ
ｍ、ｄ４＝６．６ｍｍ、ｄ３＝７．７ｍｍ。The outer diameter d1 and the inner diameter d2 of the female screw forming portion 15 and the outer diameter d3 and the inner diameter d4 of the portion 14 to be swaged are set as follows. d1 = 7.7 mm, d2 = 5.1 m
m, d4 = 6.6 mm, d3 = 7.7 mm.
【００３４】前記フランジ部１３の肉厚ｔ１、雌ねじ形
成部分１５の肉厚ｔ２、かしめ予定部１４の肉厚ｔ３、
雌ねじ１６の底部と対応する雌ねじ形成部分１５の肉厚
ｔ４を、次のように設定する。ｔ１＝１．２ｍｍ、ｔ２
＝１．３ｍｍ、ｔ３＝０．５５ｍｍ、ｔ４＝０．８５ｍ
ｍ。The thickness t1 of the flange portion 13, the thickness t2 of the female screw forming portion 15, the thickness t3 of the portion 14 to be swaged,
The thickness t4 of the female screw forming portion 15 corresponding to the bottom of the female screw 16 is set as follows. t1 = 1.2 mm, t2
= 1.3 mm, t3 = 0.55 mm, t4 = 0.85 m
m.
【００３５】図６（ｃ）に示す前記肉厚ｔ２と対応する
図６（ｂ）に示す肉厚ｔ２´を、１．１ｍｍとしてい
る。従って、肉厚ｔ２´からｔ２への増加率は、 ［（１．３−１．１）／１．１］×１００≒１８％ となっている。The thickness t2 'shown in FIG. 6B corresponding to the thickness t2 shown in FIG. 6C is set to 1.1 mm. Therefore, the rate of increase from the thickness t2 ′ to t2 is [(1.3-1.1) /1.1] × 100 ≒ 18%.
【００３６】[0036]
【００３７】[0037]
【００３８】[0038]
【発明の効果】以上詳述したように、 請求項１記載の発
明は、かしめ予定部分となる先端部の長さを充分確保す
ることができ、貫通孔の打ち抜き動作に要する動力を軽
減して、成型装置の耐久性を向上することができる。
又、先端部の打ち抜かれた頂面板の肉厚が薄いので、材
料費を低減することもできる。 As described above in detail, according to the first aspect of the present invention, it is possible to sufficiently secure the length of the tip portion to be the portion to be swaged, and to reduce the power required for the punching operation of the through hole. In addition, the durability of the molding device can be improved.
Further, since the thickness of the top plate punched at the tip is thin, material costs can be reduced.
【００３９】請求項２記載の発明は、面取部の形成を容
易に行うことができる。According to the second aspect of the invention, the chamfered portion can be easily formed.
【図１】 この発明のＴナットの一実施形態を示す縦断
面図。FIG. 1 is a longitudinal sectional view showing one embodiment of a T-nut of the present invention.
【図２】 Ｔナットの雌ねじを形成しない状態の縦断面
図。FIG. 2 is a longitudinal sectional view showing a state in which a female screw of a T-nut is not formed.
【図３】 金属板の斜視図。FIG. 3 is a perspective view of a metal plate.
【図４】 Ｔナットの製造工程を示す断面図。FIG. 4 is a sectional view showing a manufacturing process of the T nut.
【図５】 Ｔナットの製造工程を示す断面図。FIG. 5 is a sectional view showing a manufacturing process of the T nut.
【図６】 かしめ予定部分、貫通孔、雌ネジ形成部分の
加工工程を示す断面図。FIG. 6 is a cross-sectional view showing a processing step of a portion to be swaged, a through hole, and a female screw forming portion.
【図７】 Ｔナットの斜視図。FIG. 7 is a perspective view of a T-nut.
【図８】 Ｔナットの使用状態を示す断面図。FIG. 8 is a sectional view showing a use state of a T-nut.
１１…Ｔナット、１２…軸部、１３…フランジ部、１
４…かしめ予定部分、１５…雌ねじ形成部分、１６…雌
ねじ、２１…帯状金属板、２２…円形基板、２３…膨出
部、２４…基部、２５…先端部、２６…貫通孔、ｄ１…
雌ねじ形成部分の外径、ｄ２…雌ねじ形成部分の内径、
ｄ３…かしめ予定部分の外径、ｄ４…かしめ予定部分の
内径、ｔ１…フランジ部の肉厚、ｔ２…雌ねじ形成部分
の肉厚、ｔ２´…雌ねじ形成部分となる基部２４の肉
厚、ｔ３…かしめ予定部分の肉厚、ｔ４…雌ねじのねじ
溝底部と対応する雌ねじ形成部分の肉厚。11 T nut, 12 Shaft, 13 Flange, 1
4 ... part to be swaged, 15 ... female screw forming part, 16 ... female screw, 21 ... band-shaped metal plate, 22 ... circular substrate, 23 ... bulge, 24 ... base, 25 ... tip, 26 ... through hole, d1 ...
Outer diameter of female screw forming part, d2 ... inner diameter of female screw forming part,
d3: outer diameter of the portion to be swaged, d4: inner diameter of the portion to be swaged, t1: thickness of the flange portion, t2: thickness of the female screw forming portion, t2 ': thickness of the base portion 24 which becomes the female screw forming portion, t3 ... The thickness of the portion to be swaged, t4: the thickness of the female screw forming portion corresponding to the thread groove bottom of the female screw.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平６−323315（ＪＰ，Ａ) 特開 平７−27122（ＪＰ，Ａ) 特開 平７−116769（ＪＰ，Ａ) 特開 平１−262032（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F16B 37/04 B21K 1/70 ────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-323315 (JP, A) JP-A-7-27122 (JP, A) JP-A-7-116769 (JP, A) JP-A-1- 262032 (JP, A) (58) Field surveyed (Int. Cl. 7 , DB name) F16B 37/04 B21K 1/70
Claims (2)
を残し、その中心部を該金属板の一方向へ膨出させ、こ
の膨出部（２３）の前記かしめ予定部分（１４）に相当
する先端部（２５）の外径（ｄ３´）を前記雌ねじ形成
部分（１５）に相当する基部（２４）の外径（ｄ１´）
と比べて比較的小さくすることにより、前記先端部（２
５）の肉厚（ｔ３´）を前記基部（２４）の肉厚（ｔ２
´）より薄くし、 次いで、かしめ予定部分（１４）に相当する先端部（２
５）に貫通孔（２６）を設け、 前記基部（２４）の肉厚（ｔ２´）を増大しつつ、その
外径（ｄ１´）及び内径（ｄ２´）を縮小し、 前記基部（２４）の内周面上に雌ねじ（１６）を形成す
る各工程を備えるＴナットの製造方法。 1. A metal plate is provided with a portion serving as a flange portion (13), and a central portion thereof is swelled in one direction of the metal plate. The outer diameter (d3 ') of the corresponding tip (25) is the outer diameter (d1') of the base (24) corresponding to the female screw forming portion (15).
By making it relatively small compared to
The thickness (t3 ′) of the base (24) is changed to the thickness (t2) of the base (24).
′) Thinner, and then the tip (2) corresponding to the portion to be swaged (14)
5) A through hole (26) is provided, and the outer diameter (d1 ') and the inner diameter (d2') of the base (24) are reduced while increasing the thickness (t2 ') of the base (24). A method for manufacturing a T-nut, comprising the steps of forming a female screw (16) on an inner peripheral surface of a T-nut.
３）の基部（２４）と反対側外周縁に面取部（１３１）
を形成する工程を備えるＴナットの製造方法。 2. The method according to claim 1 , wherein the flange portion (1) is provided.
3) chamfered portion (131) on the outer peripheral edge opposite to the base (24)
A method for producing a T-nut, comprising: forming a T-nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21167696A JP3190264B2 (en) | 1996-08-09 | 1996-08-09 | Manufacturing method of T nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21167696A JP3190264B2 (en) | 1996-08-09 | 1996-08-09 | Manufacturing method of T nut |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1054415A JPH1054415A (en) | 1998-02-24 |
| JP3190264B2 true JP3190264B2 (en) | 2001-07-23 |
Family
ID=16609754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21167696A Expired - Fee Related JP3190264B2 (en) | 1996-08-09 | 1996-08-09 | Manufacturing method of T nut |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3190264B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6139237A (en) * | 1997-12-26 | 2000-10-31 | Nagayama Electronic Industry Co., Ltd. | Metallic fastening member and fabrication method thereof |
| JP3310939B2 (en) * | 1997-12-26 | 2002-08-05 | 永山電子工業株式会社 | Metal fastening member and method of manufacturing the same |
| JP3310934B2 (en) * | 1998-07-16 | 2002-08-05 | 永山電子工業株式会社 | T nut |
| WO2001026840A1 (en) * | 1999-10-15 | 2001-04-19 | Araco Kabushiki Kaisha | Cold forging and method of manufacturing the cold forging |
| KR101364916B1 (en) * | 2011-03-09 | 2014-02-19 | 주식회사 케이이 | Burring process and the system of vehicle panel iron plate |
| FR3032246B1 (en) * | 2015-01-30 | 2017-08-04 | Bollhoff Otalu Sa | CRIMP NUT AND FIXING ASSEMBLY COMPRISING SUCH NUT |
| JP2016159349A (en) * | 2015-03-05 | 2016-09-05 | 株式会社ＮｅｊｉＬａｗ | Fastening body, and manufacturing method of the fastening body |
-
1996
- 1996-08-09 JP JP21167696A patent/JP3190264B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1054415A (en) | 1998-02-24 |
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