JP2624805B2 - Deburring method for forged products - Google Patents
Deburring method for forged productsInfo
- Publication number
- JP2624805B2 JP2624805B2 JP27700988A JP27700988A JP2624805B2 JP 2624805 B2 JP2624805 B2 JP 2624805B2 JP 27700988 A JP27700988 A JP 27700988A JP 27700988 A JP27700988 A JP 27700988A JP 2624805 B2 JP2624805 B2 JP 2624805B2
- Authority
- JP
- Japan
- Prior art keywords
- burr
- knuckle
- forged product
- cutting
- deburring
- 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
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、各種鍛造品のバリ取り方法に関するもので
ある。The present invention relates to a method for deburring various forged products.
〔従来の技術〕 従来、バリ取りに際して、バリ付き軸状物品のバリ部
に、予め、位置決め用の厚肉部を形成しておき、この厚
肉部をバリ取り型の凹部に嵌合させて軸状物品を正確に
位置決めできるようにバリ取り型が提案されている（特
開昭57−206545号公報参照）。[Prior art] Conventionally, at the time of deburring, a thick portion for positioning is previously formed on a burr portion of a shaft-like article with a burr, and this thick portion is fitted into a recess of a deburring mold. A deburring mold has been proposed so that a shaft-shaped article can be accurately positioned (see JP-A-57-206545).
ところで、上記のような軸状物品等を含む各種鍛造品
において、バリ部に平坦部位、つまり、切断方向に対し
て直交する部位と、この平坦部位に対し傾斜を有する傾
斜部位とが存在する場合、バリ部の厚さ自体はほぼ均一
であっても、バリ部を切断する際の切断ストロークは傾
斜部材で平坦部位より大きくなる。そのため、バリ部の
切断は平坦部位では傾斜部位より早期に終了するが、平
坦部位の切断後、傾斜部位の切断が終了するまでの間に
平坦部位に切断用のパンチから継続して加わる荷重によ
り鍛造品の曲がり変形が生じるという問題を有してい
た。By the way, in various forged products including the above-mentioned shaft-shaped article etc., when the burr portion has a flat portion, that is, a portion orthogonal to the cutting direction and an inclined portion having an inclination with respect to this flat portion. Even when the thickness of the burr portion is substantially uniform, the cutting stroke when cutting the burr portion is larger than that of the flat portion due to the inclined member. Therefore, the cutting of the burr is completed earlier in the flat part than in the inclined part, but after cutting the flat part, the load continuously applied from the cutting punch to the flat part until the cutting of the inclined part ends. There was a problem that bending deformation of the forged product occurred.
本発明の請求項第１項に係る鍛造品のバリ取り方法
は、上記の課題を解決するために、鍛造後に鍛造品から
バリ部を切断して除去するバリ取り方法において、鍛造
に際してバリ部における最大傾斜部位の切断方向の厚さ
とほぼ同じ切断方向の厚さを有する厚肉部を最大傾斜部
位以外の部位に形成しておき、鍛造後に上記厚肉部を含
むバリ部を切断するようにしたことを特徴とするもので
ある。In order to solve the above-mentioned problems, a deburring method for a forged product according to claim 1 of the present invention is a deburring method for cutting and removing a burr portion from a forged product after forging. A thick portion having a thickness in the cutting direction substantially the same as the thickness in the cutting direction of the maximum inclined portion was formed in a portion other than the maximum inclined portion, and the burr portion including the thick portion was cut after forging. It is characterized by the following.
また、本発明の請求項第２項に係る鍛造品のバリ取り
方法は、請求項第１項記載の鍛造品のバリ取り方法にお
いて、上記鍛造品か屈曲部を有していることを特徴とす
るものである。A deburring method for a forged product according to claim 2 of the present invention is the deburring method for a forged product according to claim 1, characterized in that the forged product has a bent portion. Is what you do.
上記の方法のように、鍛造に際して、バリ部における
最大傾斜部位、つまり、切断方向の厚さの最も大きい部
位とほぼ同じ切断方向の厚さを有する肉厚部を最大傾斜
部位以外の部位に設けておくことにより、切断ストロー
クがバリ部の全域でほぼ均一となり、これにより、切断
時にバリ部に加わる荷重がバリ部の全域でほぼ均一にな
って切断がバリ部の全域でほぼ同時に終了するようにな
るので、バリ取りに際して鍛造品の曲がり変形は生じに
くくなる。As in the above method, at the time of forging, the maximum inclined portion in the burr portion, that is, a thick portion having a thickness in the cutting direction substantially the same as the portion having the largest thickness in the cutting direction is provided in a portion other than the maximum inclined portion. By doing so, the cutting stroke becomes almost uniform over the entire burr section, so that the load applied to the burr section at the time of cutting is almost uniform over the entire burr section, and the cutting is completed almost simultaneously over the entire burr section. Therefore, bending deformation of the forged product during deburring is less likely to occur.
特に、屈曲部を有する複雑な形状の鍛造品を成形する
場合、鍛造材料の塑性流れの均一化や金型による成形性
等を優先するために、バリ部には必ず屈曲部が形成され
るので曲がり変形を生じる可能性が高い。従って、屈曲
部を有する鍛造品に上記の方法を適用することは、鍛造
品の曲がり変形を防止する上で非常に有効である。In particular, when forming a forged product having a complicated shape having a bent portion, a bent portion is always formed in the burr portion in order to give priority to uniformity of the plastic flow of the forging material and formability by a mold. It is highly likely that bending deformation occurs. Therefore, applying the above method to a forged product having a bent portion is very effective in preventing bending deformation of the forged product.
本発明の一実施例を第１図乃至第３図に基づいて説明
すれば、以下の通りである。An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.
第１図（ａ）（ｂ）に示すように、鍛造品の一例とし
ての車両のナックル１は、鍛造直後には周縁部にバリ部
２を備えている。バリ部２は平坦部位2aと傾斜部位2bと
を備え、スピンドル1aの近傍の最も傾斜角度の大きい傾
斜部位2cにおいて切断方向の寸法Ｌが最大となってい
る。As shown in FIGS. 1 (a) and 1 (b), a knuckle 1 of a vehicle as an example of a forged product has a burr portion 2 on a peripheral portion immediately after forging. The burr portion 2 includes a flat portion 2a and an inclined portion 2b, and the dimension L in the cutting direction is the largest at the inclined portion 2c having the largest inclination angle near the spindle 1a.
バリ部２における最大傾斜の傾斜部位2c以外の部位に
は、ナックル１の鍛造に際して、複数の厚肉部2d・2d…
が形成されている。各厚肉部2dの切断方向の厚さＬ′
は、上記傾斜角度が最大の傾斜部位2cにおける切断方向
の厚さＬとほぼ等しくなるように設定される。例えば、
本実施例のナックル１では、Ｌが11.65mmとされている
ので、厚肉部2dの切断方向の厚さＬ′の値も11.65mm程
度の値が選択されている。When the knuckle 1 is forged, a plurality of thick portions 2d, 2d,...
Are formed. Thickness L 'in the cutting direction of each thick portion 2d
Is set such that the inclination angle is substantially equal to the thickness L in the cutting direction at the maximum inclined portion 2c. For example,
In the knuckle 1 of this embodiment, since L is set to 11.65 mm, the value of the thickness L 'in the cutting direction of the thick portion 2d is also selected to be about 11.65 mm.
また、各厚肉部2dの幅は、傾斜部位2cを含む傾斜部位
2bの面積等を考慮して設定される。なお、厚肉部2dは、
バリ部２の切断時に、ナックル１における主要加工部位
の変形を重点的に防止できるように、主要加工部位の近
傍に設けるのが好ましい。In addition, the width of each thick portion 2d is determined by the inclination
It is set in consideration of the area of 2b and the like. The thick portion 2d is
When the burr 2 is cut, the knuckle 1 is preferably provided near the main processing portion so that deformation of the main processing portion can be mainly prevented.
第２図（ａ）（ｂ）にナックル１の鍛造に使用する鍛
造型を示す。この鍛造型は２個のナックル１を同時に鍛
造できるように構成され、上型３及び下型４にはそれぞ
れナックル１の形状に対応した凹部3a・4aが形成されて
いる。また、凹部3a・4aの周囲にはバリ部２を形成する
ための溝部3b・4bが形成されるとともに、この溝部3b・
4b内には、バリ部２における厚肉部2dを形成するための
溝部3b・4bより深い微小な溝部3c・4cが設けられてい
る。なお、上型３及び下型４に設けた垂直方向の孔3d・
3d…、4d・4d…内には、鍛造されたナックル１を離型さ
せるためのノックピンが移動自在に嵌合されている。2 (a) and 2 (b) show a forging die used for forging the knuckle 1. FIG. This forging die is configured so that two knuckles 1 can be forged at the same time, and concave portions 3a and 4a corresponding to the shape of the knuckle 1 are formed in the upper die 3 and the lower die 4, respectively. Around the recesses 3a and 4a, grooves 3b and 4b for forming the burrs 2 are formed, and the grooves 3b and 4b are formed.
In the burr 4b, there are provided minute grooves 3c and 4c deeper than the grooves 3b and 4b for forming the thick portion 2d of the burr 2. In addition, the vertical holes 3d provided in the upper die 3 and the lower die 4
A knock pin for releasing the forged knuckle 1 is movably fitted in 3d, 4d, 4d.
第３図に示すように、バリ取り装置は、ナックル１の
バリ部２を載置する替刃５を支持するとともに、中央に
孔6aを有する下部ホルダ６と、ナックル１の上部のほぼ
全域に接触できるようにナックル１の上部に対応した形
状を有し、ナックル１を下方に押圧するパンチ７と、こ
のパンチ７を支持する上部ホルダ８とを備えている。As shown in FIG. 3, the deburring device supports a replacement blade 5 on which the burr portion 2 of the knuckle 1 is placed, and has a lower holder 6 having a hole 6a at the center and a substantially entire upper portion of the knuckle 1. It has a shape corresponding to the upper part of the knuckle 1 so that it can make contact with it, and includes a punch 7 for pressing the knuckle 1 downward and an upper holder 8 for supporting the punch 7.
上記の構成において、ナックル１の製造に際しては、
上型３と下型４間でナックル１を鍛造した後、鍛造した
ナックル１をバリ部２が替刃５上に位置するようにバリ
取り装置上に載置じ、パンチ７によりナックル１を下方
に押圧すると、バリ部２が替刃５により切断され、バリ
部２の切断によりナックル１は孔6a内に落下する。な
お、バリ部２の切断時に、バリ部２に厚肉部2dが形成さ
れていることにより、切断ストロークはバリ部２の全域
でほぼ均一となり、従って、バリ部２に加わる荷重がバ
リ部２の全域でほぼ均一となってバリ部２の切断は全域
でほぼ同時に終了するので、バリ部２の切断に伴うナッ
クル１の曲がり変形は軽減される。In the above configuration, when manufacturing the knuckle 1,
After forging the knuckle 1 between the upper die 3 and the lower die 4, the forged knuckle 1 is placed on a deburring device so that the burr portion 2 is located on the spare blade 5, and the knuckle 1 is lowered by the punch 7. When pressed, the burr portion 2 is cut by the spare blade 5, and the knuckle 1 falls into the hole 6a due to the cutting of the burr portion 2. When the burr portion 2 is cut, the thick portion 2 d is formed in the burr portion 2, so that the cutting stroke is substantially uniform over the entire area of the burr portion 2, so that the load applied to the burr portion 2 is reduced. And the cutting of the burr portion 2 is completed almost simultaneously in the entire region, so that the bending deformation of the knuckle 1 accompanying the cutting of the burr portion 2 is reduced.
上記の実施例では、鍛造品の一例としてナックルを挙
げたが、本発明はナックル以外の各種鍛造品にも適用す
ることができるものである。In the above embodiment, a knuckle is described as an example of a forged product, but the present invention can be applied to various forged products other than the knuckle.
本発明の請求項第１項に係る鍛造品のバリ取り方法
は、以上のように、鍛造後に鍛造品からバリ部を切断し
て除去するバリ取り方法において、鍛造に際してバリ部
における最大傾斜部位の切断方向の厚さとほぼ同じ切断
方向の厚さを有する厚肉部を最大傾斜部位以外の部位に
形成しておき、鍛造後に上記厚肉部を含むバリ部を切断
するようにした構成であり、また、請求項第２項に係る
鍛造品のバリ取り方法は、請求項第１項に記載の鍛造品
のバリ取り方法において、上記鍛造品が屈曲部を有して
いる構成である。As described above, the deburring method for a forged product according to claim 1 of the present invention is a deburring method for cutting and removing a burr portion from a forged product after forging. A thick portion having a thickness in the cutting direction substantially the same as the thickness in the cutting direction is formed in a portion other than the maximum inclined portion, and the burr portion including the thick portion is cut after forging, In addition, a deburring method for a forged product according to a second aspect is the method for deburring a forged product according to the first aspect, wherein the forged product has a bent portion.
上記の構成により、切断方向の厚さがバリ部の全域で
ほぼ均一となり、これにより、切断がバリ部の全域でほ
ぼ同時に終了するようになるので、バリ取りに際して鍛
造品の曲がり変形は生じにくくなるという効果を奏す
る。According to the above configuration, the thickness in the cutting direction becomes substantially uniform over the entire burr portion, and thereby, the cutting is completed almost simultaneously over the entire burr portion. It has the effect of becoming.
特に、請求項第２項で挙げた、屈曲部を有する鍛造品
の成形では、鍛造材料の塑性流れの均一化や金型による
成形性等を優先するために、バリ部には必ず屈曲部が形
成されることになる。従って、切断方向の厚みの差によ
る曲がり変形を生じる可能性が高く、屈曲部を有する鍛
造品に上記の方法を適用することは、鍛造品の曲がり変
形を防止する上で非常に有効である。In particular, in forming a forged product having a bent portion as described in claim 2, a bent portion must be formed in the burr portion in order to prioritize uniformity of plastic flow of the forged material, formability by a mold, and the like. Will be formed. Therefore, bending deformation due to a difference in thickness in the cutting direction is highly likely to occur, and applying the above method to a forged product having a bent portion is very effective in preventing bending deformation of the forged product.
【図面の簡単な説明】 第１図乃至第３図は本発明の実施例を示すものであっ
て、第１図（ａ）はナックルの概略平面図、第１図
（ｂ）はナックルの概略正面図、第２図（ａ）は鍛造型
における下型の平面図、第２図（ｂ）は第２図（ａ）の
Ａ−Ａ線に沿う鋳造型の断面説明図、第３図はバリ取り
装置の断面図である。 １はナックル（鍛造品）、２はバリ部、2cは最大傾斜の
傾斜部位、2dは厚肉部である。BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 3 show an embodiment of the present invention. FIG. 1 (a) is a schematic plan view of a knuckle, and FIG. 1 (b) is a schematic of a knuckle. FIG. 2 (a) is a front view, FIG. 2 (a) is a plan view of a lower die in a forging die, FIG. 2 (b) is a cross-sectional explanatory view of the casting die along line AA in FIG. 2 (a), and FIG. It is sectional drawing of a deburring apparatus. 1 is a knuckle (forged product), 2 is a burr part, 2c is an inclined part with the maximum inclination, and 2d is a thick part.
Claims (2)
するバリ取り方法において、 鍛造に際してバリ部における最大傾斜部位の切断方向の
厚さとほぼ同じ切断方向の厚さを有する厚肉部を最大傾
斜部位以外の部位に形成しておき、鍛造後に上記厚肉部
を含むバリ部を切断するようにしたことを特徴とする鍛
造品のバリ取り方法。1. A deburring method for cutting and removing a burr portion from a forged product after forging, wherein a thick portion having a thickness in a cutting direction substantially equal to a thickness in a cutting direction of a maximum inclined portion of the burr portion at forging. A deburring method for a forged product, wherein the deburring portion is formed at a portion other than the maximum inclined portion and a burr portion including the thick portion is cut after forging.
徴とする請求項第１項記載の鍛造品のバリ取り方法。2. The deburring method for a forged product according to claim 1, wherein said forged product has a bent portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27700988A JP2624805B2 (en) | 1988-10-31 | 1988-10-31 | Deburring method for forged products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27700988A JP2624805B2 (en) | 1988-10-31 | 1988-10-31 | Deburring method for forged products |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02121742A JPH02121742A (en) | 1990-05-09 |
| JP2624805B2 true JP2624805B2 (en) | 1997-06-25 |
Family
ID=17577491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27700988A Expired - Fee Related JP2624805B2 (en) | 1988-10-31 | 1988-10-31 | Deburring method for forged products |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2624805B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101972835B (en) * | 2010-09-10 | 2012-07-04 | 湖北三环锻造有限公司 | Closed forging technique for steering knuckle |
| CN102489659A (en) * | 2011-11-16 | 2012-06-13 | 日照市七星汽车部件有限公司 | Method for forging steering knuckle |
| JP6065873B2 (en) * | 2014-05-23 | 2017-01-25 | マツダ株式会社 | Connecting rod manufacturing method and apparatus |
-
1988
- 1988-10-31 JP JP27700988A patent/JP2624805B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02121742A (en) | 1990-05-09 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |