JPS6032540B2 - Manufacturing method of nippers by die forging - Google Patents
Manufacturing method of nippers by die forgingInfo
- Publication number
- JPS6032540B2 JPS6032540B2 JP16534978A JP16534978A JPS6032540B2 JP S6032540 B2 JPS6032540 B2 JP S6032540B2 JP 16534978 A JP16534978 A JP 16534978A JP 16534978 A JP16534978 A JP 16534978A JP S6032540 B2 JPS6032540 B2 JP S6032540B2
- Authority
- JP
- Japan
- Prior art keywords
- nipper
- forming
- bearing
- die forging
- blade
- 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
Links
Landscapes
- Forging (AREA)
Description
【発明の詳細な説明】
本発明は、強靭な刃を有するニッパーを量産が出来る型
鍛造によるニッパーの製造法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing nippers by die forging, which allows mass production of nippers having strong blades.
従来のニッパーの型鍛造は、鍛造後、鍛造品が型から抜
けるように、また刃部内側の肉つきを出来るだけ少なく
する為第８図に示すように軸受部の両側面を垂直方向に
向けて型鍛造（通称縦打ち鍛造）を行っている。In conventional die forging of nippers, both sides of the bearing part are oriented vertically as shown in Figure 8 in order to allow the forged product to come out of the die after forging and to minimize the thickness of the inside of the blade part. We perform die forging (commonly known as vertical forging).
このため、どうしても型鍛造後には軸受部の上下面に軸
受孔用の予備孔と摺合面用の摺合面形成凹部を機械加工
しなければならないが、加工に当たっても、先ずバリ取
り後〜仕上切削を行い、そしてセンターをだした上で予
備孔と楢合面形成凹部を加工しなくてはならないから厄
介な作業であり、量産を妨げる上に製品にバラッキが出
て高い精度を要求することが出来ない欠点があった。For this reason, after die forging, it is necessary to machine a preliminary hole for the bearing hole and a sliding surface forming recess for the sliding surface on the upper and lower surfaces of the bearing part. It is a troublesome work because it is necessary to machine the preliminary hole and the recess for forming the mating surface after centering the hole, which hinders mass production, and results in unevenness in the product, which requires high precision. There were no drawbacks.
その上、柄部は鍛造上直線状態にしか鍛造出来ないため
、後で所定形状に曲げ加工しなければならすそれだけ工
程数が増え、量産を妨げる結果になつていた。本発明は
、かかる欠点を解決したもので、ニッパー素材を従来縦
型鍛造の状態から９０ｏ横に倒して軸受部の両側面を垂
直方向に向けた型鍛造で同時に予備孔と摺合面形成凹部
を形成して手間のかかる機械加工と柄部の曲げ加工を不
要にして量産化を計ると共に精度の高い製品を提供し、
また予備孔と沼合面形成凹部の凹のみ分だけ地金の節約
、地金加熱燃料費の節約もできる型鍛造によるニッパー
の型製造法にして、その構成を添付図面を参照に詳述す
ると次の通りである。Furthermore, since the handle can only be forged into a straight shape, it must be bent into a predetermined shape later, which increases the number of steps and hinders mass production. The present invention solves this problem by turning the nipper material horizontally at 90 degrees from the conventional vertical forging state and die forging the material with both sides of the bearing section facing vertically, simultaneously forming the preliminary hole and the sliding surface forming recess. By eliminating the need for forming, time-consuming machining and bending of the handle, we aim to mass produce products and provide highly accurate products.
In addition, we have adopted a method for manufacturing a nipper mold by die forging, which saves metal and fuel costs for heating the metal by the amount of the preliminary hole and the recess for forming the mating surface, and its configuration will be described in detail with reference to the attached drawings. It is as follows.
第１図に示す棒状の地金１を約１２００３０の鍛造温度
まで加熱する。A rod-shaped base metal 1 shown in FIG. 1 is heated to a forging temperature of about 120,030°C.
この地金１を使用して出来上がりニツパーの左右一対の
柄部２、刃部３、軸受部４よりなる２本のニッパー素材
ａを並べて型鍛造を行う際に、軸受部４の上下面４ａ，
４ｂが垂直方向に向くようにニッパ−素材ａを横向きに
した状態で型鍛造を行って柄部２が湾曲し「軸受部４の
上面４ａに摺合面６形成用の摺合面形成凹部６、下面４
ｂに軸受孔７形成用の予備孔８（凹部）がそれぞれ垂直
方向に向けられて形成され、軸受部４の先端部にも刃部
３形成用の水平部９ａ、垂直部ｇｂ、斜辺部９ｃよりな
る刃部形成坂部９が水平方向に向けられて蓮設形成され
た２本のニッパー素材ａを鍛造する。When die forging two nipper materials a consisting of a pair of left and right handle parts 2, blade parts 3, and bearing parts 4 of the finished nipper using this base metal 1, the upper and lower surfaces 4a of the bearing parts 4,
Die forging is carried out with the nipper material a turned sideways so that the nipper material 4b faces vertically, so that the handle 2 is curved and a sliding surface forming recess 6 for forming a sliding surface 6 is formed on the upper surface 4a of the bearing section 4, and a lower surface is formed. 4
Preparatory holes 8 (concavities) for forming the bearing hole 7 are formed in b in the vertical direction, and the tip of the bearing part 4 also has a horizontal part 9a, a vertical part gb, and an oblique part 9c for forming the blade part 3. Two nipper materials a are forged, each of which has a blade-forming slope 9 oriented in a horizontal direction and formed in a cross-section.
この左右一対のニッパ−素材ａは刃部３を外側に向け、
而かもニッパー素材ａが表裏になるように型鍛造を行っ
ている。This pair of left and right nipper materials a have their blade portions 3 facing outward,
Moreover, the die forging is performed so that the nipper material a is the front and back sides.
このニッパー素材ａの外周に形成されているバリ１０を
打ち抜き加工により除去して２本の切り離した左右一対
のニッパー素材ａを作る。The burr 10 formed on the outer periphery of this nipper material a is removed by punching to produce a pair of left and right nipper materials a separated into two pieces.
このニツパー素材ａを機械加工により予備孔８を所定形
状の軸受孔７、沼合面形成凹部６を所定形状の摺合面６
、刃部形成板部９を所定形状の刃部３にそれぞれ形成し
て組立前の２本のニッパ−組立前部材ｂを形成し、この
２本のニッパ一組立前部材ｂを常法通り組立てニッパ−
の出来上がり品Ａとする。By machining this nipper material a, a preliminary hole 8 is formed into a bearing hole 7 of a predetermined shape, and a mating surface forming recess 6 is formed into a sliding surface 6 of a predetermined shape.
, the blade part forming plate part 9 is formed on the blade part 3 of a predetermined shape to form two nippers before assembly - pre-assembly member b, and these two nippers - pre-assembly member b are assembled in the usual manner. Nipper
Let the finished product be A.
図中１１は軸である。In the figure, 11 is an axis.
本発明は上述の様に構成したから次の様な特長を有する
ものである。Since the present invention is constructed as described above, it has the following features.
１ 従来のニッパー素材ｃの型鍛造は、鍛造後〜鍛造品
が型から抜けるように、また刃部１３内側に後加工する
ほどの肉がつかないように第８図に示すように軸受部富
２の両側面を垂直方向に向け型鍛造を行っている。1. In the conventional die forging of the nipper material c, after forging, the bearing part is thickened as shown in Fig. 8 in order to allow the forged product to come out of the mold and to prevent the inside of the blade part 13 from being thick enough to require post-processing. Die forging is performed with both sides of 2 facing vertically.
仮切こ軸受部１２を９００横に倒して、横打ち鍛造しよ
うとしても刃部盲３内側の三角部分可３ａに肉が沢山盛
られ、この肉を後で機械加工によりきれいに除去しなく
てはならないから大変であり、また現在の型技術的から
いつでも横打ち鍛造に踏み切れない原因があった。Even if you try to horizontally forge the temporarily cut bearing part 12 by 900 degrees, a lot of meat will be piled up on the triangular part 3a inside the blade part blind 3, and this meat will have to be removed cleanly later by machining. This is difficult because it does not work, and the current die technology prevents us from using horizontal forging at any time.
この点、本発明はニツパー素材ａを軸受部４の上下面４
ａ，４ｂが垂直方向に向くように横向きにした状態で型
鍛造を行うものであるから同時に軸受部４の上面４ａに
摺合面５形成用の摺合面形成凹部６、下面４ｂに軸受孔
７形成用の予備孔８を形成され、この予備孔８酒合面形
成凹部６と予備孔８を鍛造後機械加工することにより所
定形状の軸受孔７と摺合面５とが形成されるから従来の
軸受部１２両側面のバリを取り、仕上切削、センターを
だし、その後機械加工する方法に比べて極めて作業能率
が向上することになる。In this respect, the present invention uses the nipper material a on the upper and lower surfaces 4 of the bearing portion 4.
Since the die forging is carried out with a and 4b horizontally facing vertically, at the same time a sliding surface forming recess 6 for forming a sliding surface 5 is formed on the upper surface 4a of the bearing part 4, and a bearing hole 7 is formed on the lower surface 4b. A preliminary hole 8 is formed for the bearing hole 8, and by machining the preliminary hole 8, the mating surface forming recess 6, and the preliminary hole 8 after forging, the bearing hole 7 and the sliding surface 5 of a predetermined shape are formed. Compared to the method of removing burrs from both sides of the part 12, finishing cutting, centering, and then machining, the work efficiency is greatly improved.
この場合、既に摺合面形成凹部６、予備孔８のセンター
が出ているから一層機械加工がスピードアップされる。In this case, since the centers of the sliding surface forming recess 6 and the preliminary hole 8 have already been exposed, the machining process is further sped up.
（斜辺部９ｃ内側）そして刃部３内側の三角部分３ａに
盛られる肉もバリ１０を刃緑３ｂに沿って出すように型
を設計することにより三角部分３ａに後加工するまでの
肉がつくことを防止され「解決することが出来る。２
従来ニッパ−素材ｃの柄部１４は型が大きく重くなる関
係上、曲げて型鍛造出来ず、直線状態でしか型鍛造が出
羅ないから後で所定形状に曲げ加工をしてやらなくては
ならない欠点があり、それだけ工程数が増えている。(The inside of the oblique side 9c) And by designing the mold so that the burr 10 comes out along the blade green 3b for the meat to be placed on the triangular part 3a inside the blade part 3, the meat is attached to the triangular part 3a until post-processing. This can be prevented and resolved.2
The handle part 14 of the conventional nipper material c cannot be bent and die-forged because the die is large and heavy, and die-forging can only be done in a straight line, so it must be bent into a predetermined shape later. , and the number of processes increases accordingly.
この点本発明はニッパー素材ａを横向きにして型鍛造を
行うことにより同時に型鍛造によって柄部２を所定形状
に曲げることが出釆るから従来のように曲げ加工が不要
となり、それだけ工程数を少なくすることが出来る。In this respect, in the present invention, by die forging the nipper material a sideways, it is possible to simultaneously bend the handle 2 into a predetermined shape by die forging, which eliminates the need for the conventional bending process, which reduces the number of steps. It can be reduced.
３ この軸受部４、予備孔８を凹ませて形成すると凹ま
せる分だけ地金１を少なく出来るから地金１の軽量化を
計り、それだけ抜し、易くなると共に地金１を加熱する
場合でも従来品に比べて加熱時間も短縮出来「作業能率
のアップと加熱燃料費のコストダウンを計ることができ
る。3 If this bearing part 4 and preliminary hole 8 are formed by recessing, the base metal 1 can be reduced by the amount of the recess, so the weight of the base metal 1 can be reduced, making it easier to pull out, and even when heating the base metal 1. Heating time is also shorter than conventional products, which improves work efficiency and reduces heating fuel costs.
４ 従来の型鍛造は、刃部１３の組織断面図は第９図に
示す通りで組織線１５東が縦方向に走り、その東間隔が
粗で繊密性に劣っているから強度が弱くすぐに摩耗し、
切れ味が低下するニツパーとなった。4 In conventional die forging, the cross-sectional view of the structure of the blade part 13 is as shown in Fig. 9, and the structure line 15 east runs in the vertical direction, and the distance between the east is coarse and the delicateness is poor, so the strength is weak and it easily deteriorates. worn out,
It became a nitzper whose sharpness deteriorated.
この点本発明は横打ち鍛造であるから刃部３の組織断面
図が第７図に示す通りで組織線１６束が一側上部から他
側下部に向かって密の等東間隔でバランス良く流れ、繊
密性に優れているから強度が大きく摩耗しない強轍性、
切れ味が優れたニッパーを提供することになる。In this regard, since the present invention uses horizontal forging, the cross-sectional view of the structure of the blade part 3 is as shown in FIG. , has excellent densities, so it has high strength and strong rutting resistance that does not wear out.
This will provide nippers with excellent sharpness.
以上本発明は、著しく工程数を省略出来、高精度、均Ｊ
性、強靭‘性の優れたニッパーを安価に提供する優れた
特長を有するものである。As described above, the present invention can significantly reduce the number of steps, achieve high precision, and achieve uniformity.
It has the excellent feature of providing nippers with excellent strength and toughness at a low cost.
第１図は地金の斜面図、第２図は型鍛造によって出来上
がったニッパー素材を表側から見た斜面図、第３図は第
２図のニッパー素材を裏側から見た斜面図、第４図はバ
リ完全除去した左右一対のニッパー素材の正面図、第５
図は左右一対のニッパ一組立前部材の正面図、第６図は
出来上がりニッパ−の斜面図、第７図は本発明の刃部組
織図、第８図は従来の型鍛造法を示す斜面図、第９図は
従来品の刃部組織図である。
ａ・・・・・・ニッパー素材、ｂ・・・・・・ニッパ一
組立前部材、１・…・・地金、２…・・・柄部、３…・
・・刃部、４・・・・・・軸受部、４ａ………上面、４
ｂ・・・・・・下面、５・・・・・・礎合面、６・・・
・・・摺合面形成凹部、７・・・・・・軸受孔、８…・
・・予備孔、９・・・・・・・・・刃部形成板部、９ａ
・・・・・・水平部、９ｂ・・・…垂直部、９ｃ・・・
・・・斜辺部、１０‐‐‐‐‐−バリ。
第１図
第２図
第３図
第４図
第５図
第６図
第７図
第８図
第９図Figure 1 is a slope view of the bare metal, Figure 2 is a slope view of the nipper material completed by die forging, viewed from the front side, Figure 3 is a slope view of the nipper material in Figure 2, viewed from the back side, Figure 4 Figure 5 is a front view of a pair of left and right nipper materials with burrs completely removed.
The figure is a front view of a pair of left and right nippers before assembly, Figure 6 is a slope view of the completed nipper, Figure 7 is a diagram of the blade structure of the present invention, and Figure 8 is a slope view showing the conventional die forging method. , FIG. 9 is a diagram of the blade structure of the conventional product. a... Nipper material, b... Parts before nipper assembly, 1... Base metal, 2... Handle, 3...
...Blade part, 4...Bearing part, 4a...Top surface, 4
b...Bottom surface, 5...Foundation surface, 6...
...Sliding surface forming recess, 7...Bearing hole, 8...
...Preliminary hole, 9...Blade forming plate part, 9a
...Horizontal part, 9b... Vertical part, 9c...
...Hintenuse section, 10------burr. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9
Claims (1)
て出来上がりニツパーの左右一対の柄部２、刃部３、軸
受部４よりなる２本のニツパー素材ａを並べて型鍛造を
行う際に、軸受部４の上下面４ａ，４ｂが垂直方向に向
くようにニツパー素材ａを横向きにした状態で型鍛造を
行い、柄部２が湾曲し、軸受部４の上面４ａに摺合面５
形成用の摺合面形成凹部６、下面４ｂに軸受孔７形成用
の予備孔８がそれぞれ垂直方向に向けられ形成され、軸
受部４の先端部にも刃部３形成用の水平部９ａ、垂直部
９ｂ、斜辺部９ｃよりなる刃部形成板部９が水平方向に
向けられて連設形成された２本のニツパー素材ａを製造
し、この出来上がつたニツパー素材ａの外周に形成され
ているバリを１０を除去して２本の切り離した左右一対
のニツパー素材ａを作り、このニツパー素材ａを機械加
工により予備孔８を所定形状の軸受孔７、摺合面形成凹
部６を所定形状の摺合面５、刃部形成板部９を所定形状
の刃部３に形成して組立前の２本のニツパー組立前部材
ｂを形成し、この２本のニツパー組立前部材ｂを組立て
ニツパーを製造する事を特徴とする型鍛造によるニツパ
ーの製造法。1 Heat the base metal 1 to the forging temperature, and use this base metal 1 to perform die forging by arranging two nipper materials a consisting of a pair of left and right handles 2, blades 3, and bearings 4 of the completed nippers. At this time, die forging is performed with the nipper material a turned sideways so that the upper and lower surfaces 4a and 4b of the bearing part 4 face vertically, so that the handle part 2 is curved and the sliding surface 5 is formed on the upper surface 4a of the bearing part 4.
A recess 6 for forming a sliding surface and a preliminary hole 8 for forming a bearing hole 7 are formed on the lower surface 4b, oriented vertically, and a horizontal portion 9a for forming a blade portion 3 and a vertical portion are also formed at the tip of the bearing portion 4. Two nipper materials a are manufactured in which the blade portion forming plate portion 9 consisting of the portion 9b and the oblique side portion 9c is oriented in the horizontal direction and formed in series, and the blade portion is formed on the outer periphery of the finished nipper material a. A pair of left and right nipper materials a are made by removing the burrs 10, and the nipper materials a are machined to form a bearing hole 7 with a predetermined shape and a bearing hole 7 with a predetermined shape and a sliding surface forming recess 6 with a predetermined shape. The sliding surface 5 and the blade part forming plate part 9 are formed on the blade part 3 of a predetermined shape to form two nipper assembly pre-assembly members b, and these two nipper assembly pre-assembly members b are assembled to manufacture the nippers. A method for manufacturing nitzpas by die forging, which is characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16534978A JPS6032540B2 (en) | 1978-12-23 | 1978-12-23 | Manufacturing method of nippers by die forging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16534978A JPS6032540B2 (en) | 1978-12-23 | 1978-12-23 | Manufacturing method of nippers by die forging |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20685784A Division JPS6099449A (en) | 1984-10-01 | 1984-10-01 | Die forging method of blank materials for nippers prior to assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5586636A JPS5586636A (en) | 1980-06-30 |
| JPS6032540B2 true JPS6032540B2 (en) | 1985-07-29 |
Family
ID=15810660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16534978A Expired JPS6032540B2 (en) | 1978-12-23 | 1978-12-23 | Manufacturing method of nippers by die forging |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6032540B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6178528A (en) * | 1984-09-27 | 1986-04-22 | Nissan Motor Co Ltd | Forging forming method of connecting rod cap |
| CN1077466C (en) * | 1999-01-08 | 2002-01-09 | 宋达华 | Process for working blank of hand-tool, e. g. pliers, frog clamp, etc. |
| US7111376B2 (en) | 2003-01-13 | 2006-09-26 | The Stanley Works | Tool with inserted blade members |
| CN105195654B (en) * | 2015-09-28 | 2017-08-25 | 邵阳东方神鹰工具制造有限公司 | A kind of forging and stamping crude green body integrally forming machine processed for pliers |
-
1978
- 1978-12-23 JP JP16534978A patent/JPS6032540B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5586636A (en) | 1980-06-30 |
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