JPH10113727A - Method for drilling or cutting tubing having elasticity - Google Patents
Method for drilling or cutting tubing having elasticityInfo
- Publication number
- JPH10113727A JPH10113727A JP29918796A JP29918796A JPH10113727A JP H10113727 A JPH10113727 A JP H10113727A JP 29918796 A JP29918796 A JP 29918796A JP 29918796 A JP29918796 A JP 29918796A JP H10113727 A JPH10113727 A JP H10113727A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- cutting
- dies
- blade
- cross
- 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
Links
Landscapes
- Details Of Cutting Devices (AREA)
- Punching Or Piercing (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、金属またはプラス
チック等の管材（パイプ）をプレスにより、穿孔または
切断する工作方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for punching or cutting a pipe (pipe) such as metal or plastic by pressing.
【０００２】[0002]
【従来の技術】金属またはプラスチック等の横断面が円
形のパイプをプレスにより穿孔または切断する従来の方
法は、工作すべきパイプをその外径よりも僅かに大きい
内径を持つ二つの金型で均等に固定し、特にプレス開始
時のパイプ横断面の変形を極力避けながら刃物の押し込
みを行なってきた。切断終了後のパイプの切断面は刃先
の圧迫により、元の円形からハート形に変形することが
多く二次加工による仕上げの必要があり、特に刃先が磨
耗し始めると、その傾向は顕著であった。また上述の切
断法で特に大口径管等の場合、パイプ壁の切り屑が未切
断の壁面に被ることがあり、その祭の切断面は荒く、刃
先の損傷も著しい。なお、切断を二回に分けて逆方向か
らも行なえば、刃先の損傷は免れるが切断後のパイプ断
面が著しく変形することが多かった。2. Description of the Related Art A conventional method of punching or cutting a pipe having a circular cross section, such as metal or plastic, by pressing a pipe to be machined is equalized by two dies having an inner diameter slightly larger than its outer diameter. , And the knife has been pushed in while minimizing deformation of the pipe cross section at the start of pressing. After cutting, the cut surface of the pipe is often deformed into a heart shape from the original circular shape due to the pressure of the cutting edge, and it is necessary to finish by secondary processing. Was. Also, in the above-mentioned cutting method, especially in the case of a large-diameter pipe or the like, chips on the pipe wall may be applied to the uncut wall surface, and the cut surface at the festival is rough and the cutting edge is significantly damaged. In addition, if the cutting was performed twice and also performed in the opposite direction, damage to the cutting edge was avoided, but the cross section of the pipe after cutting was often significantly deformed.
【０００３】[0003]
【発明が解決しようとする課題】プレスによりパイプを
穿孔・切断する場合、パイプ材を圧着する金型の内径を
パイプの外径より極めて僅か大きく仕上げるのは難し
く、パイプと金型の間に若干の間隙が生じ、パイプを側
面から強く圧迫することが困難となり、そのためパイプ
の切断面がハート形に変形することが多く、切断面の二
次加工や刃物の度重なる研磨などの労働的、時間的、材
料的損失等が多く、大量生産体制に重大な問題があっ
た。そこで、パイプを側面から加圧して抗張力を増加さ
せた上で穿孔・切断し、精密な仕上がり面を得て上述の
欠点を解決しようとするものである。When a pipe is pierced or cut by a press, it is difficult to finish the inner diameter of a mold for pressing the pipe material very slightly larger than the outer diameter of the pipe. This makes it difficult to press the pipe strongly from the side, and the cut surface of the pipe often deforms into a heart shape, which requires labor and time, such as secondary processing of the cut surface and repeated polishing of the blade. Cost, material loss, etc., and there was a serious problem with the mass production system. Therefore, the pipe is pressurized from the side to increase the tensile strength, and then pierced and cut to obtain a precise finished surface and to solve the above-mentioned drawbacks.
【０００４】[0004]
【課題を解決するための手段】本発明は、金属またはプ
ラスチック等のパイプの弾性を利用し、パイプの側面を
左右の楕円凹面の金型により弾性限界内で圧縮し、パイ
プ断面が楕円形になるように固定し、楕円の長軸方向か
ら刃物をプレス挿入し、パイプを穿孔・切断する。その
後金型からパイプを開放すると、切断面は弾性により元
の円形に回復する。必要に応じては刃物の押し込みを始
めと異なる長軸方向からも行なう。本発明の場合は圧縮
により材料が最初に刃先と接触する部分の抗張力を高め
た上での工作であり上述の問題点を解決している。According to the present invention, the elasticity of a pipe such as metal or plastic is utilized, and the side surfaces of the pipe are compressed within the elastic limit by means of left and right elliptical concave molds so that the pipe cross section becomes elliptical. The pipe is pierced and cut by pressing and inserting a blade from the major axis direction of the ellipse. Then, when the pipe is released from the mold, the cut surface is restored to the original circular shape by elasticity. If necessary, the blade is pushed in from a different longitudinal direction from the beginning. In the case of the present invention, the work is performed after increasing the tensile strength of the portion where the material first comes into contact with the cutting edge by compression, and the above-mentioned problem is solved.
【０００５】[0005]
【発明の実施の形態】本発明の実施のための装置・設備
および操作は従来の汎用プレス機と基本的に同一であ
る。添付図の各部分について説明すると、１は切断すべ
きパイプ材であり、２，２′はパイプを固定する金型で
プレステーブル９に取り付け、３は穿孔・切断用の刃物
（上刃）で厚さは１〜３ｍｍ、４，４′は金型を締め付
けるための下型（２，２′，４，４′，８，）のカム、
５，５′は上型（３，５，５′，６，７）のカムで上型
のセットプレート６に固定されておりコミ７により上下
し、８はスライド溝、９はプレステーブルであり、１０
は下型のセットプレート、１１は必要に応じて設ける穿
孔・切断用の刃物（下刃）、１２は金型４，４′中に仕
込まれた押しバネ、１３は楕円凹面の圧着用金型であ
る。操作は、図１において刃物３（上刃）が切断位置に
達する直前に上型のカム５，５′が下型のカム４，４′
を挟み込むことにより下型のカム４，４′を介して、金
型２，２′を締め付けてパイプ１を固定し、以降下型の
カム面４，４′をスライドさせながら固定を続け、上刃
３によりパイプ壁を突き破り切り開きながら切断するも
のである。切断終了後、上刃のカムを下型から離し、金
型２，２′中に仕込まれている押しバネ１２により、下
型をスライド溝８に沿わせて左右に引き離し、ストッパ
ーに当たるまで開く。その後パイプを開放撤去し次のパ
イプ材を送入する。なお、切断を二回に分けて行なう場
合は、逆方向にも下刃１１を設ける。図２はパイプ切断
部分の正面図であり、切断直前の状態で、点線で示した
上刃３ａと上型のカム５ａ，５ａ′は切断終了時点の位
置であり、上型のカムが下型のカムを挟み付けることに
より金型２，２′を左右から締め付けている。図３は開
放状態の金型１３ａ，１３ａ′と下型のカム４，４′の
正面図であり、押しバネ１２により左右に押し広げられ
てパイプを開放する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The apparatus, equipment and operation for carrying out the present invention are basically the same as those of a conventional general-purpose press. Explaining each part of the attached drawings, 1 is a pipe material to be cut, 2 and 2 'are dies for fixing the pipe, which are attached to the press table 9, and 3 is a knife (upper blade) for drilling and cutting. The thickness is 1 to 3 mm, and the lower and upper molds (2, 2 ', 4, 4', 8, 8) for tightening the mold are 4, 4 '.
5, 5 'are upper type (3, 5, 5', 6, 7) cams which are fixed to the upper type set plate 6 and move up and down by a press 7, 8 are slide grooves, and 9 is a press table. , 10
Is a lower mold set plate, 11 is a drilling / cutting knife (lower blade) provided as needed, 12 is a pressing spring prepared in the dies 4, 4 ', and 13 is an elliptical concave crimping die. It is. In FIG. 1, the upper cams 5 and 5 'are turned into the lower cams 4 and 4' immediately before the blade 3 (upper blade) reaches the cutting position in FIG.
, The molds 2, 2 'are tightened via the lower cams 4, 4' to fix the pipe 1, and thereafter the lower cam surfaces 4, 4 'are slid and fixed. The blade 3 cuts while piercing and opening the pipe wall. After the cutting is completed, the cam of the upper blade is separated from the lower die, and the lower die is pulled left and right along the slide groove 8 by the pressing spring 12 charged in the dies 2 and 2 ', and is opened until it hits the stopper. After that, the pipe is opened and removed, and the next pipe material is sent. When cutting is performed twice, the lower blade 11 is also provided in the opposite direction. FIG. 2 is a front view of the pipe cutting portion. In the state immediately before cutting, the upper blade 3a and the upper cams 5a and 5a 'indicated by dotted lines are at the end of cutting, and the upper cam is the lower die. The molds 2 and 2 'are tightened from the left and right by sandwiching the cam. FIG. 3 is a front view of the dies 13a and 13a 'and the lower cams 4 and 4' in the opened state.
【０００６】[0006]
【実施例】プレスによるパイプの穿孔・切断の具体的な
進行状況を示すと、従来の工作法では図４においてパイ
プ１は横断面が円形のまま金型２，２′に圧着された状
態で、上方から刃物３で加圧されてパイプ上面の穿孔が
始まり切り屑はパイプ内に張りだす。図５では刃物３が
押し下げられるとパイプ側壁が刃物厚に従ってむしり取
られるように内側に丸め込まれる。図６では刃物３が更
に押し下げられてパイプ下面を内側から突き破り始め、
切り屑がパイプ外に押し出される。この直前に切り屑が
下面と刃物の間に挟まる場合には、刃物の負荷が極めて
増大し磨耗・損傷することが多い。図７は切断終了寸前
の状態であるが、下面の突き破りが済むと切り屑は順次
パイプ外に押し出され、切断は容易に進行する。図８は
工作終了後のパイプの切断面であるが、殆どは横広がり
のハート形に変形しており旋盤等による二次加工が必要
である。特に切断を二回に分けて行なった場合は切断面
の変形は更に著しくなる。本発明では、図９のように内
側に楕円面を持つ金型１３，１３′でパイプを楕円形に
変形させて圧着・固定し、長軸方向から刃物を差し込
む。途中の進行は従来の場合と同様であるが、パイプを
金型から開放すると弾性により切断面は円形に復元す
る。なお、必要に応じて図９のように刃物（下刃）１１
を逆方向から押し込む二回の操作を行なっても殆ど支障
は無い。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The concrete progress of drilling and cutting of a pipe by a press is shown in FIG. 4 in a state where the pipe 1 is crimped to the molds 2 and 2 'with a circular cross section in the conventional working method. Then, pressure is applied from above by the blade 3 to start drilling on the upper surface of the pipe, and chips are projected into the pipe. In FIG. 5, when the blade 3 is pushed down, the pipe side wall is rounded inward so as to be peeled off according to the blade thickness. In FIG. 6, the blade 3 is further pushed down and starts to break through the lower surface of the pipe from the inside,
Chips are pushed out of the pipe. If chips are caught between the lower surface and the blade immediately before this, the load on the blade is extremely increased, and wear and damage often occur. FIG. 7 shows a state immediately before the end of the cutting, but when the lower surface is pierced, the chips are sequentially pushed out of the pipe, and the cutting easily proceeds. FIG. 8 shows a cut surface of the pipe after the completion of the work. Most of the cut surface is deformed into a heart shape that is spread laterally, and secondary processing by a lathe or the like is required. In particular, when cutting is performed twice, deformation of the cut surface becomes more remarkable. In the present invention, the pipe is deformed into an elliptical shape by dies 13, 13 'having an elliptical surface on the inside as shown in FIG. 9, and the pipe is crimped and fixed, and a blade is inserted from the long axis direction. The progress on the way is the same as in the conventional case, but when the pipe is released from the mold, the cut surface is restored to a circular shape by elasticity. In addition, if necessary, as shown in FIG.
There is almost no problem even if two operations of pushing in from the opposite direction are performed.
【０００７】[0007]
【発明の効果】本発明ではパイプ１を側面から強く圧着
するための金型２，２′はパイプの側面を左右から弾性
限界内で圧縮しパイプ断面を楕円形にして固定できるよ
うに、金型の内接面をパイプの外径よりも大きい曲率半
径を持つ短軸の楕円面に加工した物を使用する。パイプ
を円形に固定の従来の方法に比べ、本発明での材料が最
初に刃先と接触する部分は、圧縮による曲率半径の縮小
と反り方向への加圧の結果、抗張力は一時的に著しく高
められた状態となる。そのため、切断を二回に分けて行
なう場合でも刃先の損傷も少なく、切断面の仕上がりも
良好となる。上述のように、従来のものと基本的に同一
である装置・設備および操作を利用しながら、金型の改
良による側面からの加圧下でのプレスという基本的要素
の改善により、格段に良好な仕上がり製品を得て、二次
加工などの労働的、時間的、材料的損失等を解消し、大
量生産体制への移行を可能にした。According to the present invention, the molds 2 and 2 'for strongly pressing the pipe 1 from the side are fixed so that the side of the pipe can be compressed from the left and right within the elastic limit and the cross section of the pipe can be made elliptical and fixed. The inner surface of the mold is processed into a short-axis elliptical surface having a radius of curvature larger than the outer diameter of the pipe. Compared with the conventional method of fixing the pipe in a circular shape, the portion where the material of the present invention first comes into contact with the cutting edge has a temporarily increased tensile strength as a result of the reduction of the radius of curvature due to compression and the pressing in the warp direction. It will be in the state that was done. Therefore, even when cutting is performed twice, damage to the cutting edge is small, and the finish of the cut surface is good. As described above, the improvement of the mold and the improvement of the basic element of pressing under pressure from the side, while utilizing the same equipment, facilities and operations as those of the conventional one, provide a much better By obtaining finished products, labor, time, and material losses such as secondary processing have been eliminated, making it possible to shift to a mass production system.
【図１】従来のプレスによるパイプカッター汎用機の概
略図である。FIG. 1 is a schematic view of a conventional press cutter general-purpose machine.
【図２】従来のプレスによるパイプカッター汎用機の切
断部の正面図である。FIG. 2 is a front view of a cutting section of a general-purpose pipe cutter using a conventional press.
【図３】従来のプレスによるパイプカッター汎用機の切
断部の金型が開放状態のときの正面図である。FIG. 3 is a front view of a conventional pipe cutter general-purpose machine using a press when a die at a cutting portion is in an open state.
【図４】従来の工作法で刃先がパイプ壁を突き破り切り
開いていく穿孔開始時のパイプの横断面図である。FIG. 4 is a cross-sectional view of a pipe at the start of drilling in which a cutting edge breaks through and opens a pipe wall by a conventional working method.
【図５】従来の工作法で刃先がパイプ壁を突き破り中程
まで切断したときのパイプの横断面図である。FIG. 5 is a cross-sectional view of a pipe when a cutting edge breaks through a pipe wall and cuts to a middle part by a conventional working method.
【図６】従来の工作法で刃先がパイプの下面を突き破り
始めたときのパイプの横断面である。FIG. 6 is a cross-sectional view of a pipe when a cutting edge starts to break through a lower surface of the pipe by a conventional working method.
【図７】従来の工作法で刃先がパイプを切断終了する寸
前のパイプの切断面である。FIG. 7 is a cut surface of the pipe just before the cutting edge finishes cutting the pipe by a conventional working method.
【図８】従来の工作法によるパイプの切断面である。FIG. 8 is a sectional view of a pipe formed by a conventional working method.
【図９】本発明で刃先がパイプ壁を突き破り始めるとき
のパイプの横断面図である。FIG. 9 is a cross-sectional view of the pipe when the cutting edge starts breaking through the pipe wall in the present invention.
１ 切断すべき管材（パイプ） ２ 円形凹面の固定用金型 ３ 穿孔・切断用刃物（上刃） ４ 金型締め付け用下型のカム ５ 上型のカム ６ 上型のセットプレート ７ 上型昇降用コミ ８ スライド溝 ９ プレステーブル １０ 下型のセットプレート １１ 穿孔・切断用刃物（下刃） １２ 金型中に仕込まれている押しバネ １３ 楕円凹面の圧着用金型 DESCRIPTION OF SYMBOLS 1 Pipe material to be cut (pipe) 2 Circular concave fixing die 3 Drilling / cutting blade (upper blade) 4 Lower die cam for die tightening 5 Upper die cam 6 Upper die set plate 7 Upper die elevating Press 8 Slide groove 9 Press table 10 Lower mold set plate 11 Drilling / cutting knife (lower blade) 12 Press spring loaded in mold 13 Mold for crimping elliptical concave surface
Claims (2)
で側面から下型のカム４，４′を介して上型のカム５，
５′により締め付け、管材の横断面が楕円形になるよう
に固定し、楕円の長軸方向から刃物３を押し込むことに
より穿孔または切断する方法。1. An elliptical concave mold 13 or 13 '
And the upper cam 5, via the lower cam 4, 4 'from the side.
A method of tightening by 5 ', fixing the tube so that the cross section of the tube becomes elliptical, and piercing or cutting by pushing the cutter 3 from the major axis direction of the ellipse.
し込みを始めと異なる長軸方向からも行なうことを特徴
とする管材の穿孔または切断方法。2. A method for piercing or cutting a tubular material according to claim 1, wherein the blade is pushed in from a different longitudinal direction from the beginning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29918796A JPH10113727A (en) | 1996-10-07 | 1996-10-07 | Method for drilling or cutting tubing having elasticity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29918796A JPH10113727A (en) | 1996-10-07 | 1996-10-07 | Method for drilling or cutting tubing having elasticity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10113727A true JPH10113727A (en) | 1998-05-06 |
Family
ID=17869277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29918796A Pending JPH10113727A (en) | 1996-10-07 | 1996-10-07 | Method for drilling or cutting tubing having elasticity |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10113727A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002239649A (en) * | 2001-02-16 | 2002-08-27 | Asahi Optical Co Ltd | Method for machining extra fine tube for endoscope |
| CN103658306A (en) * | 2013-12-13 | 2014-03-26 | 何斌 | Die for cutting tube |
| CN104259299A (en) * | 2014-09-25 | 2015-01-07 | 苏州金鸿顺汽车部件有限公司 | Stamping die for machining notch in thin-wall tubular component |
| CN106944522A (en) * | 2017-04-10 | 2017-07-14 | 泰州日顺电器发展有限公司 | Accurate copper pipe fully automatic forming machine and its forming method |
| CN108755457A (en) * | 2018-06-20 | 2018-11-06 | 胡梦婷 | A kind of building bridge pier excision equipment and its excision construction technology |
| CN109351856A (en) * | 2018-08-15 | 2019-02-19 | 宁波鑫邦粉末冶金有限公司 | A kind of powder metallurgy guide device molding die |
| CN109530523A (en) * | 2018-11-29 | 2019-03-29 | 安徽江淮汽车集团股份有限公司 | Cut off mold |
-
1996
- 1996-10-07 JP JP29918796A patent/JPH10113727A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002239649A (en) * | 2001-02-16 | 2002-08-27 | Asahi Optical Co Ltd | Method for machining extra fine tube for endoscope |
| CN103658306A (en) * | 2013-12-13 | 2014-03-26 | 何斌 | Die for cutting tube |
| CN104259299A (en) * | 2014-09-25 | 2015-01-07 | 苏州金鸿顺汽车部件有限公司 | Stamping die for machining notch in thin-wall tubular component |
| CN104259299B (en) * | 2014-09-25 | 2016-04-27 | 苏州金鸿顺汽车部件股份有限公司 | A kind of diel of machining gap on thin-walled tubular part |
| CN106944522A (en) * | 2017-04-10 | 2017-07-14 | 泰州日顺电器发展有限公司 | Accurate copper pipe fully automatic forming machine and its forming method |
| CN108755457A (en) * | 2018-06-20 | 2018-11-06 | 胡梦婷 | A kind of building bridge pier excision equipment and its excision construction technology |
| CN109351856A (en) * | 2018-08-15 | 2019-02-19 | 宁波鑫邦粉末冶金有限公司 | A kind of powder metallurgy guide device molding die |
| CN109530523A (en) * | 2018-11-29 | 2019-03-29 | 安徽江淮汽车集团股份有限公司 | Cut off mold |
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