JPS585128B2 - Cutting device for forged products in rotary forging machines - Google Patents
Cutting device for forged products in rotary forging machinesInfo
- Publication number
- JPS585128B2 JPS585128B2 JP12646375A JP12646375A JPS585128B2 JP S585128 B2 JPS585128 B2 JP S585128B2 JP 12646375 A JP12646375 A JP 12646375A JP 12646375 A JP12646375 A JP 12646375A JP S585128 B2 JPS585128 B2 JP S585128B2
- Authority
- JP
- Japan
- Prior art keywords
- cutting
- forging
- forged product
- rotary forging
- cutting device
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/18—Making articles shaped as bodies of revolution cylinders, e.g. rolled transversely cross-rolling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shearing Machines (AREA)
- Metal Rolling (AREA)
Description
【発明の詳細な説明】
本発明は、回転鍛造機における鍛造品の切断装置に係り
、特に鍛造品の端部切離および途中部の切離に用いられ
る切断装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutting device for a forged product in a rotary forging machine, and more particularly to a cutting device used for cutting an end portion and a middle portion of a forging product.
回転鍛造(転造)は、1対の平板式金型、あるいは2本
または3本のロール形状の金型を相対的に移動させ、そ
れらの金型の楔状凸部の作用により、金型間を通る素材
に塑性変形により加工を施す方法である。Rotary forging (rolling) involves moving a pair of flat plate molds or two or three roll-shaped molds relative to each other. This is a method of processing the material passing through it by plastic deformation.
そして、素材は楔状凸部の作用で所望形状に変形加工さ
れた後、最終工程で切断装置によって切断される。After the material is deformed into a desired shape by the action of the wedge-shaped convex portion, it is cut by a cutting device in the final step.
この切断とは、例えば鍛造品の両端部の不要部分の切離
、鍛造品のその長手方向の途中における切離等を意味す
る。This cutting means, for example, cutting off unnecessary portions at both ends of the forged product, or cutting off the forged product in the middle of its longitudinal direction.
鍛造品の途中部分での切離は、生産性の向上のため、お
よび対称的形状の鍛造品を同時に得るためになされるも
ので、長手方向に一体的に連なった状態で2個以上の製
品を同時に鍛造し、最終工程でそれらを切離する。Cutting a forged product midway is done to improve productivity and to obtain forged products with symmetrical shapes at the same time. are forged at the same time and separated in the final process.
また、棒材の回転鍛造の場合にも、長い1本の鍛造棒材
を最終工程で切離して複数本の棒材とする。Also, in the case of rotary forging of bars, one long forged bar is separated in the final process to form multiple bars.
このような切断のためには、対向する金型の面に、それ
らの相対的移動につれて互いに近づく刃が突設される。For such cutting, blades are provided on the faces of the opposing molds that protrude toward each other as they move relative to each other.
これらの刃は漸次鍛造品に食い入り、鍛造品をはさみ切
るようにして切断する。These blades gradually penetrate the forged product and cut the forged product in a scissoring manner.
回転鍛造にあたっては、力の平衡を得るため、および鍛
造品にできるだけ安定した加工状態を与えるために、対
称な鍛造品および対称な回転鍛造金型が望まれる。In rotary forging, symmetrical forgings and symmetrical rotary forging dies are desired in order to obtain force balance and to give the forging as stable processing conditions as possible.
また非対称な素材または鍛造品の場合には、その力の平
衡を得るために、相応した角度の組合せの選定が試みら
れる。In the case of asymmetrical materials or forgings, an attempt is made to select a corresponding combination of angles in order to balance the forces.
これと同じことは初段工程に対しても問題となる。The same problem arises for the first stage process as well.
なぜならば、回転鍛造終了時の切断中に同時に、普通キ
ャリブレーションと呼ばれる鍛造品への最終形状および
寸法付与が行われるので、安定した回転鍛造工程を得る
ため、および僅かな加工誤差で正確な鍛造品形状を得る
ために力の平衡が絶対に必要とされるからである。This is because during cutting at the end of rotary forging, the final shape and dimensions are given to the forged product at the same time, which is usually called calibration, so in order to obtain a stable rotary forging process and to achieve accurate forging with small processing errors. This is because force balance is absolutely required to obtain the shape of the product.
ところが、切断工程の最後における切断面の質が十分な
ものとなりにくいという問題がある。However, there is a problem in that the quality of the cut surface at the end of the cutting process is difficult to obtain.
すなわち、鍛造品の中心平面までの切断刃の切断距離が
切断刃の減耗等により少なくなってくると、鍛造品の回
転軸心には最後に材料残部が残り、この残部は、くず部
分として金型による案内作用から外されるので自身の重
量によって鉤状の形に変形してしまう。In other words, when the cutting distance of the cutting blade to the center plane of the forged product decreases due to wear and tear of the cutting blade, some material remains at the rotation axis of the forged product, and this remaining material is discarded as scrap. Since it is removed from the guiding action of the mold, it deforms into a hook-like shape due to its own weight.
このことは、鍛造品にセンタリング用のポンチ穴を形成
できないので、センタリング前に前加工をさらに施さな
ければならないことを意味し、決定的な欠点となる。This is a decisive drawback since it is not possible to form a punch hole for centering in the forged product, which means that additional pre-machining must be performed before centering.
また、回転鍛造後の鍛造品に後加工としてパリ無し鍛造
を施す場合には、突出している材料残部が折れ曲ってつ
ぶされた状態で鍛造品表面に残されでしまう。Furthermore, when a forged product after rotary forging is subjected to forging without flashing as a post-processing, the protruding remaining portion of the material is left in a bent and crushed state on the surface of the forged product.
一方、小さなくず塊は必ずしも確実に分離されず、しば
しば鍛造品に付着する欠点がある。On the other hand, there is the disadvantage that small pieces of waste are not always separated reliably and often stick to the forging.
その場合、このぐず塊は付加的な加工によって分離する
か、あるいは回転鍛造金型による付加的な処理によって
削りとらねばならない。In that case, this crumb must be separated by additional processing or removed by additional processing with a rotary forging die.
しかしながら、この処置は、瞬間的になされる衝撃を伴
う残部分分離によって鍛造品の案内に不利に作用し、か
つ安全なくず塊排出に好ましくない影響を与える。However, this procedure has a detrimental effect on the guidance of the forging due to the instantaneous impact separation and has an unfavorable effect on safe waste removal.
以上の点に鑑み、本発明の目的は、回転鍛造機の鍛造品
切断装置において、切断面の良好な質を保証すること、
特に切断箇所の中心における突出部の形成を避けて、切
断面の改善された良好な質を保証すること、および確実
な切断を可能にすることにある。In view of the above points, an object of the present invention is to ensure good quality of the cut surface in a forging cutting device for a rotary forging machine.
The aim is to avoid the formation of protrusions, especially in the center of the cutting point, to ensure an improved quality of the cutting surface and to make reliable cutting possible.
本発明によれば、対をなす切断刃の最も接近する切断終
了エツジ部を、金型間で回転軸心を通る金型中間仮想面
から成る距離をおいた位置に設けることによって、前記
目的が達成される。According to the present invention, the above-mentioned object is achieved by providing the cutting end edges of the pair of cutting blades that are closest to each other at positions separated by a distance between the molds and the mold intermediate imaginary plane passing through the rotation axis. achieved.
本発明の特徴は、回転鍛造工程ないし切断工程の終了の
直前に、鍛造品の軸心と対をなす切断刃の切断終了エツ
ジ部間の面とが重ならないようにすることにある。A feature of the present invention is that immediately before the end of the rotary forging process or the cutting process, the axial center of the forged product and the surface between the cutting end portions of the pair of cutting blades are prevented from overlapping.
本発明では、対称的な作用力を得るために金型を完全に
同じ構成にすることはしない。In the present invention, the molds are not made to have exactly the same configuration in order to obtain symmetrical acting forces.
しかし、それに伴なう欠点を少なくするために、対称状
態はできる限りの間正確に保つようにし、鍛造品に作用
する力が非常に小さくなる回転鍛造工程の最後においで
はじめて対称状態がなくなるようにする。However, in order to reduce the associated drawbacks, the symmetry should be maintained as accurately as possible for as long as possible, and should only disappear at the end of the rotary forging process, when the forces acting on the forging are very small. Make it.
このため、鍛造品に対する悪影響は非常に少なくなり、
しかもこれは、金型による鍛造品の案内によって除かれ
る。For this reason, the negative impact on forged products is extremely small.
Moreover, this is eliminated by guiding the forged product through the die.
この構成では、切断刃の一方が鍛造品の軸心を必ず通り
すぎるので、問題のない切断が行われることになる。With this configuration, one of the cutting blades always passes through the axis of the forging, resulting in problem-free cutting.
本発明の構成によれば、切断速度は鍛造品軸心において
も零にはならず、むしろ鍛造品と金型の相対的回転、並
進運動の重なりによって、送り運動に相応する切断刃の
楔勾配と関連して、切断条件は著しく改善される。According to the configuration of the present invention, the cutting speed does not become zero even at the axis of the forged product, but rather, due to the overlap of the relative rotation and translational motion between the forged product and the die, the wedge slope of the cutting blade corresponds to the feed motion. In connection with this, the cutting conditions are significantly improved.
以下、図面に示す実施例に基づいて本発明を説明する。The present invention will be described below based on embodiments shown in the drawings.
第5図は平板式金型を用いる回転鍛造機の原理を示す。FIG. 5 shows the principle of a rotary forging machine using a flat plate die.
回転鍛造すべき素材1は、矢印で示すように反対方向に
移動させられる1対の平行な平板式金型2,3の間で転
造を受ける。A material 1 to be rotary forged undergoes rolling between a pair of parallel flat plate molds 2 and 3 that are moved in opposite directions as shown by the arrows.
この際、金型2.3の対向面に設けた楔状凸部2a、3
aによる作用を受けて素材1は塑性加工される。At this time, the wedge-shaped protrusions 2a and 3 provided on the opposing surface of the mold 2.3
The material 1 is plastically worked under the action of a.
楔状凸部2a、3aの終端部寄りは、実質的な塑性変形
を行なわないで鍛造品の最終寸法および形状の調整を行
なうキャリブレーション部分となっている。The ends of the wedge-shaped convex portions 2a and 3a serve as calibration portions for adjusting the final dimensions and shape of the forged product without performing substantial plastic deformation.
このようにして、キャリブレーション部分を通過する鍛
造品は、工程の最後で切断刃4,5により切断を受ける
。In this way, the forging passing through the calibration section is cut by the cutting blades 4, 5 at the end of the process.
以上の回転鍛造工程は公知のものであって、鍛造品1は
第1図に示すように最終寸法および形状を与えられた後
両端の余分な部分10を切断刃4゜5によって分離され
る。The above-described rotary forging process is a known one, and after the forged product 1 has been given its final size and shape as shown in FIG. 1, the excess portions 10 at both ends are separated by a cutting blade 4.5.
また、場合によっては、鍛造品1は、その長手方向の所
定位置で図示しない切断刃によって分断される。Further, in some cases, the forged product 1 is divided at a predetermined position in the longitudinal direction by a cutting blade (not shown).
従来の切断装置では、切断刃4,5は対称的に形成され
ている。In conventional cutting devices, the cutting blades 4, 5 are symmetrically formed.
これは、回転鍛造工程中に作用する力の平衡を得て安定
した状態で正確な回転鍛造を行なうためであり、したが
って、楔状凸部2a、3aはもちろん、切断刃4,5も
鍛造品の回転軸心を通る金型中間仮想面に関して各瞬間
に等距離にある。This is to balance the forces acting during the rotary forging process and perform accurate rotary forging in a stable state.Therefore, not only the wedge-shaped protrusions 2a and 3a but also the cutting blades 4 and 5 of the forged product. are equidistant at each moment with respect to the mold intermediate virtual plane passing through the rotation axis.
本発明によれば、切断刃4,5に関しては対称的配置お
よび形状がとられずに、非対称的配置および形状がとら
れる。According to the invention, the cutting blades 4, 5 do not have a symmetrical arrangement and shape, but an asymmetrical arrangement and shape.
その一例は第2図に示す通って、回転鍛造工程の最後に
作用する切断刃4゜5のうち、一方の切断刃4の切断終
了エツジ部は鍛造品の回転軸心を通る平面、すなわち回
転鍛造金型中間仮想面より先(図において下方)へ突出
しており、また、それに応じて他方の切断刃5の切断終
了エツジ部は金型中間仮想面に達しないで終っている。An example of this is shown in Fig. 2, of the cutting blades 4.5 that act at the end of the rotary forging process, the cutting end edge of one of the cutting blades 4 is a plane passing through the rotational axis of the forged product, that is, the rotational forging process. It protrudes beyond the forging mold intermediate imaginary surface (downward in the figure), and correspondingly, the cutting end edge portion of the other cutting blade 5 ends without reaching the mold intermediate imaginary surface.
したがって、楔状凸部2a、3aによる回転鍛造中は対
称状態のもとで安定した鍛造作業が行なわれ、その最終
工程でキャブレーションがなされ正確な鍛造寸法および
形状が得られたところで非対称的切断刃4,5による切
断がなされる。Therefore, during rotational forging using the wedge-shaped convex portions 2a and 3a, stable forging work is performed under a symmetrical state, and when carburation is performed in the final process and accurate forging dimensions and shape are obtained, the asymmetrical cutting blade A cut by 4,5 is made.
非対称的切断刃4,5を設けることによって、切断速度
は鍛造品軸心においてさえも公知の場合のように零にな
ることはなく、鍛造品1はすべての断面で切断刃45に
対して相対速度を有することになるから、前述の問題は
解消し、良質の切断面が得られる。By providing the asymmetrical cutting blades 4, 5, the cutting speed does not reach zero even in the forging axis as in the known case, and the forging 1 remains relative to the cutting blade 45 in all cross sections. Since the cutting speed is high, the above-mentioned problems are solved and a high-quality cut surface can be obtained.
第3図および第4図は本発明の原理を適用した他の例を
示す。FIGS. 3 and 4 show other examples to which the principles of the invention are applied.
この例では、金型6,7に属する切断刃8,9自体は同
形で対称をなしているが、これらの切断刃8,9は金型
6,7の厚さの差により、鍛造品1の要切断部を偏心的
に案内し切断するようになる。In this example, the cutting blades 8 and 9 belonging to the dies 6 and 7 are the same and symmetrical, but due to the difference in thickness of the dies 6 and 7, the cutting blades 8 and 9 are different from each other in the forged product 1. The cutting section of the machine is eccentrically guided and cut.
すなわち、この例でも、対をなす切断刃の切断終了エツ
ジ部は、鍛造品の軸心を通る金型中間仮想面からずれた
位置にある。That is, in this example as well, the cutting end edge portions of the pair of cutting blades are located at a position offset from the die intermediate imaginary plane passing through the axis of the forged product.
第6図は公知の円筒式回転鍛造の原理を示す。FIG. 6 shows the principle of known cylindrical rotary forging.
この場合には1対のロール状金型2,3の間で素材1が
回転鍛造されるが、本発明の原理はこの方式の回転鍛造
機にも施すことができる。In this case, the material 1 is rotary forged between a pair of roll-shaped molds 2 and 3, but the principles of the present invention can also be applied to this type of rotary forging machine.
以上のように、本発明によれば、回転鍛造品に、突出部
のない良質な切断面を形成することができる。As described above, according to the present invention, a high-quality cut surface without protrusions can be formed in a rotary forged product.
第1図は非対称の切断刃をもった本発明に基づく切断装
置の正面図、第2図は第1図における■−■線に沿う断
面図、第3図は非対称におかれた鍛造品の場合における
本発明に基づく切断装置の正面図、第4図は第3図にお
ける■−■線に沿う断面図、第5図は回転鍛造機の原理
図、第6図は地形式の回転鍛造機の原理図である。
1・・・・・・素材(鍛造品)、2,3,6,7・・・
・・・金型、4,5,8,9・・・・・・切断刃。Fig. 1 is a front view of a cutting device according to the present invention having an asymmetrical cutting blade, Fig. 2 is a sectional view taken along the line FIG. 4 is a cross-sectional view taken along the line ■-■ in FIG. 3, FIG. 5 is a principle diagram of a rotary forging machine, and FIG. 6 is a ground-type rotary forging machine. FIG. 1...Material (forged product), 2, 3, 6, 7...
... Mold, 4, 5, 8, 9... Cutting blade.
Claims (1)
ブレーション領域に材料の切断刃が設けられている回転
鍛造機における鍛造品の切断装置において、対をなす切
断刃の最も接近する切断終了エツジ部を、金型間で回転
鍛造を受ける鍛造品の回転軸心を通る金型中間仮想面か
ら成る距離をおいた位置に設けたことを特徴とする切断
装置。1. In a cutting device for a forged product in a rotary forging machine, in which a material cutting blade is provided in the calibration area of a rotary forging convex portion provided on an opposing die, the closest cutting end edge of a pair of cutting blades is used. A cutting device characterized in that the cutting device is provided at a distance between the dies and the imaginary plane between the dies passing through the rotational axis of a forged product subjected to rotational forging between the dies.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DD18234474A DD116151A1 (en) | 1974-11-13 | 1974-11-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS51109585A JPS51109585A (en) | 1976-09-28 |
JPS585128B2 true JPS585128B2 (en) | 1983-01-29 |
Family
ID=5498058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12646375A Expired JPS585128B2 (en) | 1974-11-13 | 1975-10-22 | Cutting device for forged products in rotary forging machines |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS585128B2 (en) |
BR (1) | BR7506852A (en) |
CS (1) | CS194934B1 (en) |
DD (1) | DD116151A1 (en) |
DE (1) | DE2537619A1 (en) |
FR (1) | FR2290962A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11081003B2 (en) | 2018-03-19 | 2021-08-03 | Honda Motor Co., Ltd. | Map-providing server and map-providing method |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4489581A (en) * | 1981-05-26 | 1984-12-25 | Fiziko-Tekhnichesky Institut Akademi Nauk Belorusskoi Ssr | Method of manufacturing articles by deformation of cylindrical blanks |
-
1974
- 1974-11-13 DD DD18234474A patent/DD116151A1/xx unknown
-
1975
- 1975-08-23 DE DE19752537619 patent/DE2537619A1/en active Pending
- 1975-10-13 CS CS690175A patent/CS194934B1/en unknown
- 1975-10-20 BR BR7506852A patent/BR7506852A/en unknown
- 1975-10-22 JP JP12646375A patent/JPS585128B2/en not_active Expired
- 1975-11-10 FR FR7534290A patent/FR2290962A1/en not_active Withdrawn
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11081003B2 (en) | 2018-03-19 | 2021-08-03 | Honda Motor Co., Ltd. | Map-providing server and map-providing method |
Also Published As
Publication number | Publication date |
---|---|
DE2537619A1 (en) | 1976-05-20 |
BR7506852A (en) | 1977-05-17 |
JPS51109585A (en) | 1976-09-28 |
CS194934B1 (en) | 1979-12-31 |
DD116151A1 (en) | 1975-11-12 |
FR2290962A1 (en) | 1976-06-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4725261A (en) | Cutting carton blanks and cutters therefor | |
US4109500A (en) | Creating lines of weakness in sheet material | |
DE3878636T2 (en) | METHOD FOR PRODUCING A KNIFE WITH TOOTHED CUTTING EDGE. | |
JPS585128B2 (en) | Cutting device for forged products in rotary forging machines | |
EP0559951B1 (en) | Process and cutting tool for the production of fibres out of steel plates | |
US1959190A (en) | Method of making pinking shears | |
US1690917A (en) | Method of making commutator segments and the like | |
US3148572A (en) | Scrap rejecters for cutting dies for blanks | |
US1420278A (en) | Manufacture of blading for turbines | |
JPS587375B2 (en) | Method and apparatus for bending a ring from wire or strip | |
US4092891A (en) | Apparatus for cutting steel sections | |
US3528333A (en) | Die cutter | |
US4448055A (en) | Method to manufacture pole pieces for dynamo electric machine, and so-made pole piece | |
USRE26518E (en) | Thread and other form rolling dies | |
US1555925A (en) | Method of manufacturing bolts | |
JPS6067015A (en) | Plate shearing apparatus | |
SU1016000A1 (en) | Tool for making fastening point | |
US514545A (en) | e eiserle | |
US551064A (en) | Milling-cutter | |
JPH0216826Y2 (en) | ||
US1203168A (en) | Method of making type-writer blanks. | |
JPH0237930A (en) | Cross rolling die | |
US965033A (en) | Method of making wheels or circular bodies having peripheral treads. | |
RU2136471C1 (en) | Die for restoration of cross-shaped knives | |
US1420338A (en) | Manufacture of blading for turbines |