JPH1024340A - Manufacture of work with slit and manufacture of anchor bolt - Google Patents

Manufacture of work with slit and manufacture of anchor bolt

Info

Publication number
JPH1024340A
JPH1024340A JP19828696A JP19828696A JPH1024340A JP H1024340 A JPH1024340 A JP H1024340A JP 19828696 A JP19828696 A JP 19828696A JP 19828696 A JP19828696 A JP 19828696A JP H1024340 A JPH1024340 A JP H1024340A
Authority
JP
Japan
Prior art keywords
slit
work
blank
anchor bolt
deep hole
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.)
Pending
Application number
JP19828696A
Other languages
Japanese (ja)
Inventor
Fumiaki Miyazaki
文章 宮崎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
T M T KK
Original Assignee
T M T KK
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 T M T KK filed Critical T M T KK
Priority to JP19828696A priority Critical patent/JPH1024340A/en
Publication of JPH1024340A publication Critical patent/JPH1024340A/en
Pending legal-status Critical Current

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  • Piles And Underground Anchors (AREA)
  • Forging (AREA)

Abstract

PROBLEM TO BE SOLVED: To reduce the manufacturing cost and to smoothen a punching by cold-rolling wide slits extended in the axial direction of a work and constricting the outer diameter with cold-heading. SOLUTION: A wire rod is cut off to a prescribed length to produce a blank 10. The blank 10 is set in the hole of a die and the punch is pushed from the one end side to almost near the other end to form a deep hole 11 without changing the outer diameter. The blank 12 is taken out and set into the following die. In the hole of the die, a Y-shaped plate-like pin is fitted. Then, at the time of pushing the punch from the one end side of the blank 12 to form the Y-shaped slits 13 passing the center of the end surface, the outer diameter of the blank 14 is constricted and also, the inner diameter of the deep hole 11 is constricted, too. The blank 14 is taken out and set into the following hole and pushed from the one end side of the blank 14 by using in the punch having the similar shape as the tip surface of the pushing pin at the tip part. Then, the blank 16 is taken out and set into the following hole and the punch is pushed in to obtain a preform 19 for anchor bolt.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明はスリット付きワー
クの製造方法及びアンカーボルトの製造方法に関し、特
に冷間圧造によってスリット付きワーク、例えばアンカ
ーボルトの素形材を製造するようにした方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a work with a slit and a method for manufacturing an anchor bolt, and more particularly to a method for manufacturing a work with a slit, for example, a base material of an anchor bolt by cold heading.

【0002】[0002]

【従来の技術】既設のコンクリート壁面等に機械設備等
を据え付ける場合、図2の(a) 〜(d)に示すように、コ
ンクリート壁面50にドリル51で穴をあけ、そこにア
ンカーボルト52を挿入し、アンカーボルト52内を挿
通する打込ピン53を打撃し、アンカーボルト52の下
方部位54を外方に拡開させてアンカーボルト52をコ
ンクリート壁面50に固定し、このアンカーボルト52
のねじ部55にナット56を螺合させて機械設備を固定
することが行われる。
2. Description of the Related Art As shown in FIGS. 2 (a) to 2 (d), when a machine or the like is installed on an existing concrete wall or the like, a hole is drilled in a concrete wall 50 with a drill 51, and an anchor bolt 52 is attached thereto. The anchor bolt 52 is fixed to the concrete wall 50 by inserting and hitting the driving pin 53 passing through the anchor bolt 52 to expand the lower portion 54 of the anchor bolt 52 outward.
A screw 56 is screwed with a nut 56 to fix the mechanical equipment.

【0003】従来、この種のアンカーボルト52を製造
する場合、所定の寸法に切断した線材をアンカーボルト
の形状に冷間圧造した後、図3の(a)(b)に示すように、
先端側から打込み用深穴521を次第に小径となる2本
又は3本のドリルを用いて穿孔し、後端側に十字状のス
リット520をカッターで切削することが行われてい
る。
Conventionally, when manufacturing this kind of anchor bolt 52, a wire rod cut to a predetermined size is cold-forged into the shape of an anchor bolt, and as shown in FIGS.
A deep hole 521 for driving is drilled from the front end side with two or three drills having a gradually reduced diameter, and a cross-shaped slit 520 is cut on the rear end side with a cutter.

【0004】[0004]

【発明が解決しようとする課題】しかし、従来の製造方
法では冷間圧造、ドリル穿孔及び切削(いわゆるカッタ
ー割り)という3つの異なる加工方法を用いる必要があ
って、製造作業が複雑であり、コスト高になるという問
題があった。
However, in the conventional manufacturing method, it is necessary to use three different processing methods of cold heading, drilling and cutting (so-called cutter splitting), and the manufacturing operation is complicated, and the cost is low. There was a problem of getting high.

【0005】また、従来の製造方法では打込み用深穴を
ドリルで形成していたので、その先端側には段差がで
き、打込ピンを打込む際にその先端が段差に引っ掛かっ
て途中で止まってしまい、円滑に拡開できないことがあ
った。
Further, in the conventional manufacturing method, a deep hole for driving is formed by a drill, so that a step is formed at the distal end side, and when the driving pin is driven, the distal end is caught by the step and stops halfway. In some cases, it could not be expanded smoothly.

【0006】上述の問題点を解決する方法として、冷間
圧造にてアンカーボルトの素形材までを製造する方法が
考えられるが、この場合、スリットの形成をどのように
行うかが問題となる。即ち、この種のアンカーボルトで
はその固定強度を確保すべく、打込ピンの打込みにてア
ンカーボルトの先端側をボルト径に対して十分な寸法、
例えば10mmのボルト径に対しては13mmまで拡開
することが必要であり、かかる機能を発揮させる上で、
スリット幅は1mm程度の狭幅にしておくことが肝要で
ある。従来の製造方法ではカッターを使用してスリット
を切削しているので、薄いカッターを使用して所定の狭
幅のスリットを形成することが可能であるが、冷間圧造
を採用する場合には薄いプレート状ピンを使用するとプ
レート状ピンが座屈してしまい、狭幅のスリットが形成
できない。
As a method for solving the above-mentioned problems, a method of manufacturing up to a material for an anchor bolt by cold heading can be considered. In this case, how to form a slit is a problem. . That is, in order to secure the fixing strength of this type of anchor bolt, the tip side of the anchor bolt is sufficiently dimensioned with respect to the bolt diameter by driving the driving pin.
For example, for a bolt diameter of 10 mm, it is necessary to expand the bolt to 13 mm.
It is important that the slit width be as narrow as about 1 mm. In the conventional manufacturing method, the slit is cut using a cutter, so it is possible to form a slit of a predetermined narrow width using a thin cutter, but when a cold heading is adopted, the slit is thin. When a plate-shaped pin is used, the plate-shaped pin buckles, and a narrow slit cannot be formed.

【0007】本発明は、かかる点に鑑み、冷間圧造によ
って素形材まで製造するようにしたスリット付きワーク
の製造方法を提供することを課題とする。
SUMMARY OF THE INVENTION In view of the foregoing, an object of the present invention is to provide a method of manufacturing a workpiece with a slit, which is capable of manufacturing even a shaped material by cold heading.

【0008】[0008]

【課題を解決するための手段】本件発明者は上述の課題
を解決すべく鋭意研究した結果、冷間圧造においては素
材の外径を絞ることが比較的容易であり、最初は広幅の
スリットを形成し、素材を絞って所定の狭幅のスリット
とすればよいことに着目し、本発明を完成するに至っ
た。
Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems. As a result, it is relatively easy to narrow the outer diameter of the material in cold heading, and at first, a wide slit is formed. The present invention has been completed by noting that it is only necessary to form and narrow the material to form a slit having a predetermined narrow width.

【0009】即ち、本発明に係るスリット付けワークの
製造方法は、少なくとも一端側端面にワーク軸線方向に
延びる狭幅のスリットを有するワークを製造するにあた
り、冷間圧造にて座屈しない厚みのプレート状ピンを用
い、ワークの少なくとも一端側にワーク軸線方向に延び
る広幅のスリットを冷間圧造し、上記ワークの外径を冷
間圧造にて絞ることにより上記スリットの幅を上記狭幅
に形成するようにしたことを特徴とする。
In other words, the method for manufacturing a slitted work according to the present invention is a method for manufacturing a work having a narrow slit extending at least on one end side in the axial direction of the work, the plate having a thickness not buckling by cold heading. Using a pin, at least one end of the work is cold forged a wide slit extending in the axial direction of the work, and the outer diameter of the work is narrowed by cold forging to form the slit with the narrow width. It is characterized by doing so.

【0010】本発明の特徴の1つはカッター割りを使用
することなく、冷間圧造にてスリット付きワークを製造
するようにした点にある。スリットの形状は十字状でも
よいが、ワーク端面の中央から径方向に延びる略Y字形
状の場合に特にその効果が大きい。カッター割りではカ
ッター刃との関係で十字状には形成できるが、スリット
をY字状に形成できないからである。
One of the features of the present invention is that a work with a slit is manufactured by cold heading without using a cutter split. The shape of the slit may be a cross shape, but the effect is particularly great in the case of a substantially Y-shape extending radially from the center of the end face of the work. This is because the slit can not be formed in a Y-shape in the cutter splitting, although the slit can be formed in relation to the cutter blade.

【0011】本発明はスリット付きワークであればどの
ようなものにも適用できる。例えば、アンカーボルトに
適用する場合、ダイスとパンチと有するヘッダー等を用
いて冷間圧造にて素形材を製造する方法を構築すること
ができる。
The present invention can be applied to any work having a slit. For example, when applied to anchor bolts, it is possible to construct a method of manufacturing a shaped material by cold heading using a header having a die and a punch.

【0012】即ち、本発明によれば、素材材にネジを刻
設してアンカーボルトを製造するにあたり、ダイスとパ
ンチと有するヘッダー等を用いて冷間圧造にて素形材を
製造する方法であって、素材の一端側から他端近傍に至
る素材長手方向に延びる深穴を形成する第1の行程と、
上記素材の他端側から、その他端面中央から径方向に延
びる所定の狭幅の複数条のスリットを形成する第2の行
程と、上記深穴を上記スリットと連通しかつその先端側
が打込ピンの先端面と面接触しうるテーパー状をなす打
込み用深穴に形成する第3の行程と、上記素材の外径を
絞ることにより上記スリットの幅を打込ピンの打込みに
て他端側が所定寸法だけ拡開きうる所定の広幅となした
アンカーボルトの素形材とする第4の行程と、を備えた
アンカーボルトの製造方法を提供することができる。
That is, according to the present invention, in producing an anchor bolt by engraving a screw in a raw material, a method of producing a raw material by cold heading using a header and the like having a die and a punch. A first step of forming a deep hole extending in the longitudinal direction of the material from one end of the material to the vicinity of the other end;
A second step of forming a plurality of slits of a predetermined narrow width extending radially from the center of the other end face from the other end side of the material, and communicating the deep hole with the slit, and the tip end side is formed by a driving pin. A third step of forming a tapered deep hole for forming a taper that can make surface contact with the tip end surface of the workpiece, and narrowing the outer diameter of the material to reduce the width of the slit by driving a driving pin so that the other end side is predetermined. And a fourth step of forming the anchor bolt having a predetermined width that can be expanded by a dimension.

【0013】アンカーボルトの素形材に対するねじの形
成には種々、例えば切削や転造等が方法が採用されてよ
い。転造を用いる場合には上記アンカーボルト素形材の
一端側部分をねじ下径に絞るようにする。
Various methods, such as cutting and rolling, may be employed for forming a screw on the base material of the anchor bolt. When rolling is used, the one end portion of the anchor bolt raw material is narrowed to the screw lower diameter.

【0014】[0014]

【作用及び発明の効果】本発明によれば、冷間圧造にて
座屈しない厚みのプレート状ピンを用いてワークの一端
側に広幅のスリットを冷間圧造した後、ワークの径を絞
ることによりスリット幅を所定の狭幅とするようにした
ので、従来はカッター割りに頼らざるを得なかった狭幅
のスリットを冷間圧造によって形成することができ、製
造コストを低減できる。また、従来のカッター割りでは
ほとんど不可能であった、ワーク端面中央を通る略Y字
状のスリットを形成することもできる。
According to the present invention, according to the present invention, a wide slit is formed at one end of a work by using a plate-like pin having a thickness that does not buckle during cold heading, and then the diameter of the work is reduced. , The slit width is made to be a predetermined narrow width, so that a narrow slit which had conventionally had to rely on cutter splitting can be formed by cold heading, and the manufacturing cost can be reduced. It is also possible to form a substantially Y-shaped slit passing through the center of the end surface of the work, which is almost impossible with the conventional cutter splitting.

【0015】また、本発明によれば、素材の一端側から
深穴を形成し、他端側に広幅のスリットを形成し、上記
深穴を打込み用深穴に加工した後、素材の外径を絞って
アンカーボルトの素形材とすると同時に、スリットを所
定の狭幅としたので、素形材の製造を全て冷間圧造にて
行うことができる。
According to the present invention, a deep hole is formed from one end of the material, a wide slit is formed at the other end, and the deep hole is formed into a deep hole for driving. Since the slits are narrowed to a predetermined narrow width at the same time as forming the base material of the anchor bolt, the manufacturing of the base material can all be performed by cold heading.

【0016】従って、本発明によれば、アンカーボルト
の素形材を、例えば並列したダイスとパンチとの間で順
送りすることによって連続的に製造することが可能とな
り、製造コストを大幅に低減できる。
Therefore, according to the present invention, it is possible to continuously manufacture the raw material of the anchor bolt by, for example, sequentially feeding the die and the punch in parallel, thereby greatly reducing the manufacturing cost. .

【0017】また、従来のアンカーボルトは打込み用深
穴をドリルで形成していたので、その先端側には段差が
でき、打込ピンを打込む際にその先端が段差に引っ掛か
って途中で止まってしまい易かったが、本発明によれば
パンチの先端形状を工夫することにより打込み用深穴の
先端面を打込ピンの先端面と面接触しうるテーパー面と
することができ、打込ピンの円滑な打込み作業を行うこ
とができる。
In the conventional anchor bolt, a deep hole for driving is formed by a drill, so that a step is formed on the tip side, and when the driving pin is driven, the tip is caught on the step and stops halfway. However, according to the present invention, by devising the tip shape of the punch, the tip surface of the deep hole for punching can be formed into a tapered surface that can make surface contact with the tip surface of the punch pin. Can be performed smoothly.

【0018】[0018]

【発明の実施の形態】以下、本発明を図面に示す具体例
に基づいて詳細に説明する。図1は本発明の好ましい実
施形態を示す。本発明の方法にてアンカーボルトを製造
する場合、図1の(a) に示すように、例えば直径11φ
mmの線材を所定長さに切断して素材10を製作する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to specific examples shown in the drawings. FIG. 1 shows a preferred embodiment of the present invention. When an anchor bolt is manufactured by the method of the present invention, for example, as shown in FIG.
The material 10 is manufactured by cutting a wire having a length of 1 mm into a predetermined length.

【0019】次に、この素材10をダイスの穴内にセッ
トし、パンチを素材10の一端側からほぼ他端近傍まで
押し込み、図1の(b) に示すように、外径は変化させず
に、内径5.16φmmの深穴11を形成する。
Next, this material 10 is set in a hole of a die, and a punch is pushed from one end of the material 10 to almost the other end thereof, and the outer diameter is not changed as shown in FIG. And a deep hole 11 having an inner diameter of 5.16 φmm.

【0020】この深穴11を形成した素材12を取り出
し、次のダイス内にセットするが、このダイスの穴内に
は冷間圧造によって座屈しない寸法、例えば3mmの厚
みを有する断面Y字状のプレート状ピンが取付けられて
いる。そして、パンチを素材12の一端側から押し込
み、図1の(c) に示すように、幅約3mmで、端面の中
央を通るY字状のスリット13を形成すると、素材14
の外径が10.5φmmまで絞られるとともに、深穴1
4の内径も5.06φmmと絞られる。
The material 12 having the deep hole 11 formed thereon is taken out and set in the next die. In the hole of the die, a Y-shaped cross section having a dimension that does not buckle due to cold heading, for example, a thickness of 3 mm. Plate-shaped pins are attached. Then, a punch is pushed in from one end of the material 12 to form a Y-shaped slit 13 having a width of about 3 mm and passing through the center of the end face, as shown in FIG.
The outer diameter of the hole is reduced to 10.5 mm,
The inner diameter of 4 is also reduced to 5.06 mm.

【0021】次に、この素材14を取り出し、次のダイ
スの穴にセットし、先端が打込ピンの先端面に類似する
形状のパンチを用い、素材14の一端側から押し込み、
図1の(d) に示すように、深穴11を内径5.0φmm
で、先端側が打込ピンの先端と面接触しうる打込み用深
穴15に加工し、その時、素材16の外径は11.1φ
mmまで増大する。
Next, the material 14 is taken out, set in the hole of the next die, and pushed from one end side of the material 14 using a punch having a tip similar in shape to the tip surface of a driving pin.
As shown in FIG. 1D, the deep hole 11 has an inner diameter of 5.0 mm.
Then, the tip side is machined into a deep hole 15 for driving that can make surface contact with the tip of the driving pin.
mm.

【0022】そして、素材16を取り出して次のダイス
の穴にセットし、パンチを押し込み、図1の(e) に示す
ように、素材16の外径を10.0φmmまで絞ると、
スリット18の幅が1mmに設定され、同時に打込み用
深穴17が4.1φmmとなる。アンカーボルトの素形
材19が得られる。
Then, the material 16 is taken out, set in the hole of the next die, and the punch is pushed in, and the outer diameter of the material 16 is reduced to 10.0 mm as shown in FIG.
The width of the slit 18 is set to 1 mm, and at the same time the depth of the deep hole 17 for driving is 4.1 mm. The base material 19 of the anchor bolt is obtained.

【0023】次に、この素形材19の一端側の25mm
をねじ下径に絞るとその部分の深穴21の径が4.05
φmmとなり、最後に素形材19の一端側の外周面にね
じ転造機でねじを転造すると、幅1.0mmのY字状ス
リット18を有する、全長60mmのアンカーボル21
が得られる。
Next, 25 mm on one end side of the shaped material 19
Is reduced to the screw lower diameter, the diameter of the deep hole 21 at that portion becomes 4.05.
φmm. Finally, when a screw is rolled on the outer peripheral surface at one end side of the shaped material 19 by a screw rolling machine, an anchor bolt 21 having a Y-shaped slit 18 having a width of 1.0 mm and a total length of 60 mm.
Is obtained.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 本発明の好ましい実施形態における製造工程
を示す図である。
FIG. 1 is a diagram showing a manufacturing process in a preferred embodiment of the present invention.

【図2】 従来のアンカーボルトの全体及びその一部断
面を示す図である。
FIG. 2 is a view showing the entirety of a conventional anchor bolt and a partial cross section thereof.

【図3】 アンカーボルトの使用方法を説明するための
図である。
FIG. 3 is a diagram for explaining a method of using an anchor bolt.

【符号の説明】[Explanation of symbols]

10、12、14、16 素材 11、15
深穴 13 大きな幅のスリット 17 打込み
用深穴 18 所定幅のスリット 19 アンカ
ーボルトの素形材 20 ねじ部 21 アンカ
ーボルト
10, 12, 14, 16 Material 11, 15
Deep hole 13 Slit of large width 17 Deep hole for driving 18 Slit of predetermined width 19 Shaped material of anchor bolt 20 Screw part 21 Anchor bolt

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 少なくとも一端側端面にワーク軸線方向
に延びる狭幅のスリットを有するワークを製造するにあ
たり、 冷間圧造にて座屈しない厚みのプレート状ピンを用い、
ワークの少なくとも一端側にワーク軸線方向に延びる広
幅のスリットを冷間圧造し、 上記ワークの外径を冷間圧造にて絞ることにより上記ス
リットの幅を上記狭幅に形成するようにしたことを特徴
とするスリット付きワークの製造方法。
In producing a work having a narrow slit extending in at least one end surface in the axial direction of the work, a plate-shaped pin having a thickness that does not buckle by cold heading is used.
A wide slit extending in the axial direction of the work is cold-forged at least on one end side of the work, and the width of the slit is formed to be the narrow width by narrowing the outer diameter of the work by cold forging. Characteristic method of manufacturing a work with a slit.
【請求項2】 上記スリットがワーク端面の中央から径
方向に延びる略Y字形状をなす請求項1記載のスリット
付きワークの製造方法。
2. The method according to claim 1, wherein the slit has a substantially Y-shape extending radially from the center of the end face of the work.
【請求項3】 素形材にネジを形成してアンカーボルト
を製造するにあたり、ダイスとパンチと有するヘッダー
等を用いて冷間圧造にて素形材を製造する方法であっ
て、 素材の一端側から他端近傍に至る素材長手方向に延びる
深穴を形成する第1の行程と、 上記素材の他端側から、その他端面中央から径方向に延
びる所定の狭幅の複数条のスリットを形成する第2の行
程と、 上記深穴を上記スリットと連通しかつその先端側が打込
ピンの先端面と面接触しうるテーパー状をなす打込み用
深穴に形成する第3の行程と、 上記素材の外径を絞ることにより上記スリットの幅を打
込ピンの打込みにて他端側が所定寸法だけ拡開きうる所
定の広幅となしたアンカーボルトの素形材とする第4の
行程と、を備えたことを特徴とするアンカーボルトの製
造方法。
3. A method of manufacturing a shaped member by cold heading using a header or the like having a die and a punch in forming an anchor bolt by forming a screw in the shaped member. A first step of forming a deep hole extending in the longitudinal direction of the material from the side to the vicinity of the other end, and forming a plurality of slits of a predetermined narrow width extending radially from the center of the other end face from the other end of the material. A second step of forming the deep hole into a tapered deep hole that communicates the deep hole with the slit and has a distal end surface that is in surface contact with the distal end face of the driving pin; A fourth step of reducing the outer diameter of the anchor bolt so that the width of the slit can be widened by a driving pin so that the other end side can be widened by a predetermined dimension. Of anchor bolts Method.
JP19828696A 1996-07-08 1996-07-08 Manufacture of work with slit and manufacture of anchor bolt Pending JPH1024340A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19828696A JPH1024340A (en) 1996-07-08 1996-07-08 Manufacture of work with slit and manufacture of anchor bolt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19828696A JPH1024340A (en) 1996-07-08 1996-07-08 Manufacture of work with slit and manufacture of anchor bolt

Publications (1)

Publication Number Publication Date
JPH1024340A true JPH1024340A (en) 1998-01-27

Family

ID=16388604

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19828696A Pending JPH1024340A (en) 1996-07-08 1996-07-08 Manufacture of work with slit and manufacture of anchor bolt

Country Status (1)

Country Link
JP (1) JPH1024340A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012220021A (en) * 2011-04-12 2012-11-12 Yunika Kk Arbor driving type anchor
JP2012233490A (en) * 2011-04-28 2012-11-29 Taisei Kogyo:Kk Post-construction anchor bolt
KR102303484B1 (en) 2020-10-05 2021-09-16 김출곤 The cutout groove molding/metal patterns of the anchor rivet and anchor rivet manufacturing method using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012220021A (en) * 2011-04-12 2012-11-12 Yunika Kk Arbor driving type anchor
JP2012233490A (en) * 2011-04-28 2012-11-29 Taisei Kogyo:Kk Post-construction anchor bolt
KR102303484B1 (en) 2020-10-05 2021-09-16 김출곤 The cutout groove molding/metal patterns of the anchor rivet and anchor rivet manufacturing method using the same

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