JPH0556212B2 - - Google Patents
Info
- Publication number
- JPH0556212B2 JPH0556212B2 JP61187393A JP18739386A JPH0556212B2 JP H0556212 B2 JPH0556212 B2 JP H0556212B2 JP 61187393 A JP61187393 A JP 61187393A JP 18739386 A JP18739386 A JP 18739386A JP H0556212 B2 JPH0556212 B2 JP H0556212B2
- Authority
- JP
- Japan
- Prior art keywords
- tip
- bolt
- knockout pin
- shaft
- hollow 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.)
- Expired - Lifetime
Links
- 238000005242 forging Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000007769 metal material Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Forging (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、工具を用いてボルトを締結する際に
ボルトがねじ孔の装入し易いようにボルト軸部の
先端に案内部を有するロボツト用ボルトの製造方
法に関する。Detailed Description of the Invention [Field of Industrial Application] The present invention provides a robot having a guide portion at the tip of the bolt shaft so that the bolt can be easily inserted into a screw hole when fastening the bolt using a tool. The present invention relates to a method of manufacturing a bolt for use.
［従来の技術及び問題点］
従来古くから用いられているボルトにおいて
は、軸部の先端に面取りを施してねじ孔への挿入
位置決めを容易に行えるようにしているのが一般
的であるが、このような面取りがJISにも決めら
れているように極くわずかであるから、手に持つ
て扱う場合にはその程度でも充分間に合うもの
の、無人による自動ねじ締結装置を用いる謂ゆる
ロボツト操作の場合は、この面取り程度では勿
論、先を尖らせたものでも、100パーセント円滑
確実に操作できず、適正位置に入らず空締めにな
つたり、ゆがんで無理に螺合締着されたりして不
具合いを生じるといつた問題がある。[Prior Art and Problems] In bolts that have been used for a long time, the tip of the shaft is generally chamfered to make it easier to position the bolt for insertion into a screw hole. As stipulated by JIS, this type of chamfering is extremely small, so it is sufficient for hand-held handling, but in the case of so-called robot operation using an unmanned automatic screw fastening device. Even if the tip is chamfered or sharpened, it will not be possible to operate it 100% smoothly and reliably, and the screw may not be in the correct position and may end up being screwed in place, or may be distorted and screwed together forcibly, causing problems. There is a problem that has been reported to occur.
［技術的課題］
従つて本発明において、無人による自動ねじ締
結装置に用いられるロボツト用ボルトを、連続多
段ホーマを用いて簡単確実に製造することができ
且つ規格の統一した優良な製品を提供することを
技術的課題とする。[Technical Problem] Therefore, in the present invention, it is an object of the present invention to provide an excellent product that can easily and reliably manufacture bolts for robots used in unmanned automatic screw fastening devices using a continuous multi-stage former and has uniform standards. This is a technical issue.
［問題を解決するための手段］
上記の技術的課題を解決するために、本発明に
おける先端に案内部をつたロボツト用ボルトの製
造方法は、金属素材を圧造部へ順次に送り込んで
パンチとダイスで鍛圧しボルト軸部の先端に円錐
筒形の案内部を有するロボツト用ボルトの製造方
法であつて、第１工程の頭部予備成形時に先端部
に絞りと同時に端面矯正して中心部に案内孔を形
成する予備成形を施し、第２工程で頭部成形と軸
部の絞りを行ない同時にノツクアウトピンを兼ね
た突き出しピンにて中空孔を成形し、第３工程で
中空端部をノツクアウトピンに押し当てることに
より中空孔を塞いで先端部を円錐尖鋭に絞縮せし
めることを特徴とするものである。[Means for solving the problem] In order to solve the above-mentioned technical problems, the method of manufacturing a bolt for a robot having a guide portion at the tip according to the present invention involves sequentially feeding a metal material into a forging section and using punches and dies. A method of manufacturing a bolt for a robot having a conical cylindrical guide part at the tip of the bolt shaft, which is forged by forging and having a conical cylindrical guide part at the tip of the bolt shaft, in which the tip part is drawn at the same time as the head preforming in the first step, and the end face is straightened and guided to the center part. Preforming to form the hole is performed, and in the second step, the head is formed and the shaft is drawn. At the same time, a hollow hole is formed using an ejector pin that also serves as a knockout pin. In the third step, the hollow end is knocked out. The feature is that by pressing against a pin, the hollow hole is closed and the tip is constricted into a sharp conical shape.
そして、第３工程のノツクアウトピンによる円
錐成形時にノツクアウトピンの軸心部に形成した
通気路よりエアー抜きされるようにすることが好
ましい。 It is preferable that air be vented through a ventilation passage formed in the axial center of the knockout pin during the third step of forming the cone using the knockout pin.
［作用］
第１図はロボツト用ボルトの圧造工程を示すも
ので、連続した鋼製の丸棒材からなる材料を切断
工程(a)で一定寸法に切断して素材１を得、それを
第１の圧造工程(b)へ送り込み、第１のパンチ１１
で第１のダイス１４へ据込み、頭部１a′を予備成
形し、その際に軸部１ｂの先端を軸細に絞つて軸
細の円筒部１ｃを形成すると同時に端面矯正し中
心に浅い案内孔１ｄを形成する。[Function] Figure 1 shows the forging process of a bolt for a robot, in which a material consisting of a continuous round steel bar is cut to a certain size in the cutting process (a) to obtain a material 1, which is 1 to the forging process (b), and the first punch 11
is upset into the first die 14, and preforms the head 1a'.At this time, the tip of the shaft part 1b is narrowed to form a cylindrical part 1c with a thin shaft, and at the same time, the end surface is corrected and a shallow guide is formed in the center. A hole 1d is formed.
第１工程で第３図ｂに示すように頭部予備成形
と、軸部の絞り、及び端面矯正がダイス型孔の底
部に備えるノツクアウトピン１７に軸部先端を押
し当てることにより行なわれる。 In the first step, as shown in FIG. 3b, head preforming, drawing of the shaft, and end face correction are performed by pressing the tip of the shaft against a knockout pin 17 provided at the bottom of the die hole.
パンチ１１の後退をまつてノツクアウトピン１
７がダイス型孔より突出するように作用すると予
備成形品１1が圧造成形される。 Knock out pin 1 while waiting for punch 11 to retreat.
7 protrudes from the die hole, and a preformed product 11 is formed by heading.
第２工程において、前工程で得られた予備成形
品１1を第２のパンチ１２により第２ダイス１５
へ据込むと、頭部１ａが圧造されると同時に、軸
部１ｂがさらに奥まで絞られて段部１ｅとその先
端に軸細の円筒部１ｃが形成される。このときノ
ツクアウトピンを兼ねた突き出しピン１８が所定
位置に突出して端面を突きこれにより中空孔１ｆ
が形成され、第２パンチ１２の後退をなつてダイ
ス１５から突き出しピン１８にて押出すと第２図
ｃに示す成形品１2が得られる。 In the second step, the preformed product 1 obtained in the previous step is passed through the second die 15 by the second punch 12.
When it is upset, the head 1a is forged, and at the same time, the shaft 1b is further narrowed down to form a stepped portion 1e and a cylindrical portion 1c with a thin shaft at its tip. At this time, the ejector pin 18, which also serves as a knockout pin, protrudes to a predetermined position and pierces the end face of the hollow hole 1f.
is formed, and when the second punch 12 retreats and is extruded from the die 15 with the ejector pin 18, a molded product 12 shown in FIG. 2c is obtained.
この成形品１2を第３工程に運び、第３のパン
チ１３で第３ダイス１６内へ圧入すると、円筒部
１ｃの先端縁がノツクアウトピン１９の円錐凹部
からなる先端面１９ａに突き当り、これにて押し
すぼめられるように作用するから中空孔先端が円
錐尖鋭１ｇに絞縮されたものとなる。その後パン
チ１３の後退をまつてノツクアウトピン１９が突
出すると製品となるボルト体１3が得られる。 When this molded product 12 is carried to the third step and press-fitted into the third die 16 with the third punch 13, the tip edge of the cylindrical portion 1c abuts the tip surface 19a consisting of the conical recess of the knockout pin 19. Since the hollow hole acts to be compressed by pressing, the tip of the hollow hole becomes constricted to a conical point of 1 g. Thereafter, when the punch 13 is retracted and the knockout pin 19 protrudes, a bolt body 13 is obtained as a product.
このようにして得られたボルト体１3は、この
後ねじ転造等の施工が施され、軸部１ｂにねじ１
ｈが形成される。（第３図ｅ）。 The bolt body 1 3 thus obtained is then subjected to thread rolling or the like, and the shaft portion 1b is threaded with 1
h is formed. (Figure 3e).
［発明の効果］
本発明は上記にように構成されているので次に
記載する効果を有する。[Effects of the Invention] Since the present invention is configured as described above, it has the following effects.
ボルト軸孔１ｂの先端の円筒部１ｃは段部１
ｅを存して軸細に形成され中心に中空孔１ｆを
有するため、先端部は薄肉となつており、従つ
てノツクアウトピン１９による比較的小さい押
圧力（支持力）でも円錐尖鋭に容易且つ確実に
絞縮できる。 The cylindrical portion 1c at the tip of the bolt shaft hole 1b is a stepped portion 1.
Since the tip is thin and has a hollow hole 1f in the center, it is easy to sharpen the cone even with a relatively small pressing force (supporting force) from the knockout pin 19. You can definitely narrow it down.
段部１ｅから軸部１ｂより小さい径のストレ
ートな長さを有する円筒部１ｃがあり、その先
端が円錐尖鋭であるために、ロボツト操作でボ
ルトをねじ孔に挿入する場合にガイドの役目を
して適正な姿勢でない場合でも、安全確実にボ
ルトの自動挿入から締結を適確に行なうことが
できる。 There is a cylindrical portion 1c having a straight length and a diameter smaller than that of the shaft portion 1b from the stepped portion 1e, and since the tip thereof is a sharp cone, it serves as a guide when a bolt is inserted into a screw hole by robot operation. Even if the user is not in the correct posture, bolts can be automatically inserted and fastened safely and reliably.
ボルトホーマを利用して圧造３工程で規格の
統一したロボツト用ボルトを大量生産できる。 Using a bolt former, it is possible to mass produce bolts for robots with standardized specifications in three heading processes.
円錐尖鋭に絞縮して中空孔を完全密閉するた
め、内部に液が侵入せず、従つてメツキ処理加
工等の際にメツキ液が侵入し封入されず、腐食
の心配がない。 Since the hollow hole is completely sealed by constricting to a sharp cone, no liquid will enter the inside, and therefore, during plating processing, the plating liquid will not enter and be sealed, and there is no fear of corrosion.
軸細の長いストレート状円筒部と中空孔によ
り材料が節減され、経済的である。 The long straight cylindrical part with a thin shaft and the hollow hole save material and are economical.
［実施例］
第１図は圧造３工程でロボツト用ボルト体を圧
造する工程が示されているが、４〜５工程で行な
うこともできる。[Example] Although FIG. 1 shows the process of forging a bolt body for a robot in three forging steps, it can also be carried out in four to five steps.
軸部１ｂに対する円筒部１ｃの長さは適宜増減
変更することができる。又円筒部１ｃの径は軸部
１ｂのねじ１ｈの谷径と同一か又はそれより若干
小さくなるように規定する。 The length of the cylindrical portion 1c relative to the shaft portion 1b can be increased or decreased as appropriate. Further, the diameter of the cylindrical portion 1c is specified to be the same as or slightly smaller than the root diameter of the thread 1h of the shaft portion 1b.
段部１ｅは先細まりのテーパをつけ、ひつかか
りに対し安全性を高めるようにする。 The stepped portion 1e is tapered to improve safety against snagging.
第３工程において、ダイス１６内における軸部
１ｂの支持は、段部１ｅと円筒部１ｃで行ない、
軸部１ｂの外周は隙間Ｓを設けてノツクアウトピ
ン１９に対し支持力の軽減を図つている。 In the third step, the shaft portion 1b is supported within the die 16 by the stepped portion 1e and the cylindrical portion 1c,
A gap S is provided on the outer periphery of the shaft portion 1b to reduce the supporting force against the knockout pin 19.
又、ノツクアウトピン１９の軸芯部には通気路
１９ｂを設け、圧造時に生じる空気の逃げをこれ
より行なうようにする。 Further, a ventilation passage 19b is provided in the axial center of the knockout pin 19 so that air generated during forging can escape.
図面は本発明の実施例を示すもので、その第１
図は圧造３工程部の横断平面図、第２図は第３工
程における要部の拡大断面図、第３図ａ，ｂ，
ｃ，ｄ，ｅは圧造成形品の加工順序を示す正面図
で、一部は断面で示されている。
１……素材、１１，１２，１３……パンチ、１
４，１５，１６……ダイス、１７，１８，１９…
…ノツクアウトピン、１……予備成形品、１……
圧造成形品、１……ボルト体、１ａ……頭部、１
ｂ……軸部、１ｃ……円筒部、１ｅ……段部、１
ｆ……中空孔、１ｇ……円錐尖鋭部。
The drawings show embodiments of the present invention, the first
The figure is a cross-sectional plan view of the 3rd heading process, Figure 2 is an enlarged sectional view of the main parts in the 3rd process, Figures 3a, b,
Figures c, d, and e are front views showing the processing order of the pressed molded product, some of which are shown in cross section. 1...Material, 11,12,13...Punch, 1
4, 15, 16...Dice, 17, 18, 19...
... Knockout pin, 1 ... Preformed product, 1 ...
Headed molded product, 1... Bolt body, 1a... Head, 1
b...Shaft part, 1c...Cylindrical part, 1e...Step part, 1
f...Hollow hole, 1g...Conical sharp part.
Claims (1)
とダイスで鍛圧しボルト軸部の先端に円錐筒形の
案内部を有するロボツト用ボルトの製造方法であ
つて、第１工程の頭部予備成形時に先端部に絞り
と同時に端面矯正して中心部に案内孔を形成する
予備成形を施し、第２工程で頭部成形と軸部の絞
りを行ない同時にノツクアウトピンを兼ねた突き
出しピンにて中空孔を成形し、第３工程で中空孔
端部をノツクアウトピンに押し当てることにより
中空孔を塞いで先端部を円錐尖鋭に絞縮せしめる
ことを特徴とする先端に案内部をもつたロボツト
用ボルトの製造方法。 ２ 前記第３工程のノツクアウトピンによる円錐
成形時にノツクアウトピンの軸心部に形成した通
気路よりエアー抜きされるようになつている前記
特許請求の範囲第１項記載の先端に案内部をもつ
たロボツト用ボルトの製造方法。[Scope of Claims] 1. A method for manufacturing a bolt for a robot having a conical cylindrical guide portion at the tip of the bolt shaft portion by sequentially feeding a metal material into a forging section and forging it with a punch and die, the method comprising: During preforming of the head, the tip is drawn and at the same time, the end face is straightened and a guide hole is formed in the center.In the second step, the head is formed and the shaft is drawn, and at the same time it also serves as a knockout pin. A guide part at the tip, characterized in that a hollow hole is formed with an ejector pin, and in a third step, the end of the hollow hole is pressed against a knockout pin to close the hollow hole and constrict the tip into a sharp conical shape. A method of manufacturing a bolt for a robot with a 2. A guide portion is provided at the tip according to claim 1, which allows air to be vented from an air passage formed in the axial center of the knockout pin during cone forming by the knockout pin in the third step. Method for manufacturing bolts for Motta robots.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18739386A JPS6343737A (en) | 1986-08-08 | 1986-08-08 | Manufacture of bolt for robot having guide part at its tip and product thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18739386A JPS6343737A (en) | 1986-08-08 | 1986-08-08 | Manufacture of bolt for robot having guide part at its tip and product thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6343737A JPS6343737A (en) | 1988-02-24 |
| JPH0556212B2 true JPH0556212B2 (en) | 1993-08-19 |
Family
ID=16205239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18739386A Granted JPS6343737A (en) | 1986-08-08 | 1986-08-08 | Manufacture of bolt for robot having guide part at its tip and product thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6343737A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3478014B2 (en) * | 1996-08-29 | 2003-12-10 | トヨタ自動車株式会社 | Shaft extension bolt forming method and shaft extension bolt |
| JP3336257B2 (en) * | 1998-07-07 | 2002-10-21 | 株式会社青山製作所 | bolt |
| JP4884729B2 (en) * | 2005-03-18 | 2012-02-29 | 株式会社メイドー | Axial force measuring bolt and manufacturing method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS629736A (en) * | 1985-07-04 | 1987-01-17 | Aoyama Seisakusho:Kk | Manufacture of cone point bolt |
-
1986
- 1986-08-08 JP JP18739386A patent/JPS6343737A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS629736A (en) * | 1985-07-04 | 1987-01-17 | Aoyama Seisakusho:Kk | Manufacture of cone point bolt |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6343737A (en) | 1988-02-24 |
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