JPH06304644A - Inner diameter tapered tube manufacturing method - Google Patents
Inner diameter tapered tube manufacturing methodInfo
- Publication number
- JPH06304644A JPH06304644A JP12339093A JP12339093A JPH06304644A JP H06304644 A JPH06304644 A JP H06304644A JP 12339093 A JP12339093 A JP 12339093A JP 12339093 A JP12339093 A JP 12339093A JP H06304644 A JPH06304644 A JP H06304644A
- Authority
- JP
- Japan
- Prior art keywords
- inner diameter
- mandrel
- pipe
- straight
- taper
- 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
- Extrusion Of Metal (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、外径が一様で内径がテ
ーパ部を有する内径テーパ管の製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing an inner diameter tapered pipe having a uniform outer diameter and a tapered inner diameter.
【０００２】[0002]
【従来の技術】一般に機械部品の材料として金属管を用
いることが多いが、場合によっては特殊な、例えば、材
質が低合金鋼で内径テーパ管が要求されることもある。
これは管の内孔がテーパを必要とする場合、管が異なる
内径の流体通路を接続する部品を製作する場合や、材料
管の一方の端部に加工しろとして内径側へ肉の厚いこと
を必要とする場合等である。従来はこのような特殊な管
材料が無いため、普通の管材料にすえ込み鍛造を施す場
合もあるが、殆どの場合肉の厚い管材料から切削加工に
よって所望の機械部品を製作していた。2. Description of the Related Art Generally, a metal tube is often used as a material for a mechanical part, but in some cases, a special material, for example, a low alloy steel is required to be an inner diameter tapered tube.
This means that when the inner hole of a pipe requires a taper, when making parts that connect fluid passages with different inner diameters, and when processing material at one end of the material pipe, there is thick wall on the inner diameter side. This is the case when it is necessary. Conventionally, since there is no such special pipe material, upsetting may be performed on an ordinary pipe material, but in most cases, a desired machine part is manufactured from a thick pipe material by cutting.
【０００３】[0003]
【発明が解決しようとする課題】一般に、切削加工はそ
の切削量が多いと加工コストが増大し、またすえ込み鍛
造によれば切削量は少なくできるが特別な設備を要する
ために切削加工以上にコストが増大する問題がある。本
発明は、このような問題を解決するために、内径テーパ
管を機械部品等の材料として容易に供給できるようにす
ることを目的とする。Generally, the cutting cost increases with a large cutting amount, and the cutting amount can be reduced by swaging forging, but since special equipment is required, the cutting process is more than the cutting process. There is a problem of increased cost. In order to solve such a problem, an object of the present invention is to make it possible to easily supply an inner diameter tapered pipe as a material for machine parts or the like.
【０００４】[0004]
【課題を解決するための手段】本発明の内径テーパ管の
製造方法は、所定の製品管の外径に対応する内径のダイ
スと、先端側に製品管の小内径部に対応する外径のスト
レート部を有し後部に製品管の大内径部に対応する外径
のストレート部を有し双方のストレート部の間をテーパ
ー部に形成したマンドレルとを用い、移動マンドレル方
式で熱間押し出し加工することを特徴とする。A method of manufacturing an inner diameter tapered pipe according to the present invention comprises a die having an inner diameter corresponding to the outer diameter of a predetermined product pipe and an outer diameter corresponding to a small inner diameter portion of the product pipe on the tip side. Using a mandrel with a straight part and a straight part with an outer diameter corresponding to the large inner diameter part of the product tube at the rear part and a taper part formed between both straight parts, hot extruding with a moving mandrel method It is characterized by
【０００５】[0005]
【作用】プレスラムによって押されるビレットがダイス
とマンドレルとの間を通り管となって出ていくとき、移
動マンドレル方式であるためマンドレルのテーパー部が
ダイスを通過する。この時マンドレルの移動速度よりも
管が成形されて出ていく速度のほうが速いから、その分
管内径テーパ部がマンドレルのテーパ部よりも長くな
り、従ってマンドレルのテーパよりもゆるやかなテーパ
となる。このような内径テーパ管の実際の製造において
は、管の押し出し設備がある場合には、普通はマンドレ
ルを準備すればよい。When the billet pushed by the press ram passes between the die and the mandrel and exits as a tube, the taper portion of the mandrel passes through the die because of the moving mandrel system. At this time, since the speed at which the pipe is formed and exits is faster than the moving speed of the mandrel, the pipe inner diameter taper portion is longer than that by the mandrel taper portion, and thus becomes a taper gentler than the mandrel taper. In the actual manufacture of such an inner diameter tapered tube, a mandrel may be usually prepared when the tube extrusion equipment is provided.
【０００６】[0006]
【実施例】本発明の実施例１、２を図１、図２を共用し
て説明する。図１は実施例に用いる装置で、ダイス１、
コンテナ２、マンドレル３、押し出し盤４、ステム５等
で構成された従来のストレート管の製造に用いる移動マ
ンドレル方式のものと略同じである。従来のものと異な
る点は、マンドレル３が、図示のように、先端側に製品
管の小内径部に対応する外径ｄ1 、長さＬ1 のストレー
ト部６を有し、後部に製品管の大内径部に対応する外径
ｄ2 、長さＬ3 のストレート部８を有し双方のストレー
ト部６、８の間を長さＬ2 、角θのテーパー部７に形成
してある点である。Embodiments 1 and 2 of the present invention will be described with reference to FIGS. FIG. 1 shows an apparatus used in the embodiment, which includes a die 1,
This is almost the same as that of the moving mandrel system used for manufacturing the conventional straight pipe constituted by the container 2, the mandrel 3, the extrusion board 4, the stem 5, and the like. The mandrel 3 is different from the conventional one in that the mandrel 3 has a straight portion 6 having an outer diameter d 1 and a length L 1 corresponding to the small inner diameter portion of the product pipe on the front end side and a product pipe on the rear portion as shown in the figure. Point having a straight portion 8 having an outer diameter d 2 and a length L 3 corresponding to the large inner diameter portion, and a taper portion 7 having a length L 2 and an angle θ is formed between the straight portions 6 and 8. Is.
【０００７】図２は製造する内径テーパ管１１または１
２の略図である。実施例の内径テーパ管１１または１２
は、外径がｄ3 であり、小内径ストレート部１３の内径
がｄ 4 、その長さがＬ4 、内径テーパ部１４の長さがＬ
5 、大内径ストレート部１５の内径がｄ5 、その長さが
Ｌ6 である。実施例１で製造しようとする製品管、すな
わち内径テーパ管１１は、その各部の寸法が、前記符号
を用いて示すと、ｄ3 ＝１１８．０ｍｍ、ｄ4 ＝８８．
０ｍｍ、Ｌ4 ＝１６０ｍｍ、Ｌ5 ＝１０００ｍｍ、ｄ5
＝１００．０ｍｍ、Ｌ6 は約８４０ｍｍのものである。FIG. 2 shows an inner diameter tapered tube 11 or 1 to be manufactured.
2 is a schematic diagram of 2. Inner diameter tapered tube 11 or 12 of the embodiment
Has an outer diameter of d3And the inner diameter of the small inner diameter straight portion 13
Is d Four, Its length is LFour, The length of the inner diameter tapered portion 14 is L
Five, The inner diameter of the large inner diameter straight portion 15 is dFive, Its length
L6Is. Product tube to be produced in Example 1,
In other words, the inner diameter taper pipe 11 has the above-mentioned reference numerals when the dimensions of each part are
, D3= 118.0 mm, dFour= 88.
0 mm, LFour= 160 mm, LFive= 1000 mm, dFive
= 100.0 mm, L6Is about 840 mm.
【０００８】実施例１の内径テーパ管１１の製造に使用
する装置は、ダイス１の内径が１２０．０ｍｍであり、
コンテナ２の内径（コンテナライナーの内径）Ｄ0 が２
１５ｍｍであり、マンドレル３の各部の寸法がｄ1 ＝８
８．３ｍｍ、Ｌ1 ＝２５０ｍｍ、ｄ2 ＝１００．５ｍ
ｍ、Ｌ2 ＝１１６．７ｍｍ、角θ＝３．０であり、使用
するビレットは、その寸法が外径Ｄ1 ＝２０８ｍｍ、内
径Ｄ2 ＝１０５ｍｍ、長さＬ0 ＝４００ｍｍの円筒形で
ある。実施例２で製造しようとする製品管、すなわち内
径テーパ管１２は、その各部の寸法が、前記符号を用い
て示すと、ｄ3 ＝１１８．０ｍｍ、ｄ4 ＝８８．０ｍ
ｍ、Ｌ4 ＝１６０ｍｍ、Ｌ5 ＝１２０ｍｍ、ｄ5 ＝１０
０．０ｍｍ、Ｌ6 は約１７２０ｍｍのものである。The apparatus used to manufacture the inner diameter tapered pipe 11 of Example 1 has an inner diameter of the die 1 of 120.0 mm,
Inner diameter of container 2 (inner diameter of container liner) D 0 is 2
15 mm and the dimension of each part of the mandrel 3 is d 1 = 8
8.3 mm, L 1 = 250 mm, d 2 = 100.5 m
m, L 2 = 116.7 mm, angle θ = 3.0, and the billet used is a cylindrical shape whose dimensions are an outer diameter D 1 = 208 mm, an inner diameter D 2 = 105 mm, and a length L 0 = 400 mm. . In the product pipe to be manufactured in Example 2, that is, the inner diameter taper pipe 12, the dimensions of the respective parts are d 3 = 18.0 mm and d 4 = 88.0 m when the above-mentioned reference numerals are used.
m, L 4 = 160 mm, L 5 = 120 mm, d 5 = 10
0.0 mm and L 6 are about 1720 mm.
【０００９】実施例２の内径テーパ管１２の製造に使用
する装置は、ダイス１の内径が１２０．０ｍｍであり、
コンテナ２の内径（コンテナライナーの内径）Ｄ0 が２
１５ｍｍであり、マンドレル３の各部の寸法がｄ1 ＝８
８．３ｍｍ、Ｌ1 ＝２５０ｍｍ、ｄ2 ＝１００．５ｍ
ｍ、Ｌ2 ＝１４ｍｍ、角θ＝２３．５°であり、使用す
るビレットは、その寸法が外径Ｄ1 ＝２０８ｍｍ、内径
Ｄ2 ＝１０５ｍｍ、長さＬ0 ＝４００ｍｍの円筒形であ
る。The apparatus used to manufacture the inner diameter taper tube 12 of the second embodiment has a die 1 having an inner diameter of 120.0 mm,
Inner diameter of container 2 (inner diameter of container liner) D 0 is 2
15 mm and the dimension of each part of the mandrel 3 is d 1 = 8
8.3 mm, L 1 = 250 mm, d 2 = 100.5 m
m, L 2 = 14 mm, angle θ = 23.5 °, and the billet used is a cylindrical shape with outer diameter D 1 = 208 mm, inner diameter D 2 = 105 mm, and length L 0 = 400 mm.
【００１０】実施例１、２において、使用する既存の設
備のコンテナ内径Ｄ0 、ビレットの外径Ｄ1 、ビレット
の内径Ｄ2 は具体的な数値が決まっており、製品管の各
部の寸法ｄ3 、ｄ4 、ｄ5 、Ｌ4 、Ｌ5 、Ｌ6 が決まる
と、次の数式１、数式２、数式３、数式４にしたがっ
て、夫々ビレットの長さＬ0 、マンドレル３の小径部６
の長さＬ1 、マンドレル３のテーパ部７の長さＬ2 、マ
ンドレル３の大径部８の長さＬ3 を算出したものであ
る。In Examples 1 and 2, specific values are determined for the container inner diameter D 0 , billet outer diameter D 1 , and billet inner diameter D 2 of the existing equipment used, and the dimension d of each part of the product pipe. When 3 , d 4 , d 5 , L 4 , L 5 , and L 6 are determined, the billet length L 0 and the small diameter portion 6 of the mandrel 3 are calculated according to the following formulas 1, 2, 3, and 4, respectively.
L 1 , the length L 2 of the taper portion 7 of the mandrel 3 and the length L 3 of the large diameter portion 8 of the mandrel 3 are calculated.
【００１１】[0011]
【数１】 [Equation 1]
【００１２】[0012]
【数２】 [Equation 2]
【００１３】[0013]
【数３】 [Equation 3]
【００１４】[0014]
【数４】 [Equation 4]
【００１５】前記数式１、２、３、４において、δは熱
膨張係数、ａはビレットをコンテナ内に収容してその後
端面が押し出し盤に当接し先端面がダイスに当接した段
階のダイスより突き出るマンドレル部分の長さ（この部
分は製品管ガイドであり製品管が曲がらないようにする
もので値は製品管寸法によって異なる）、ｂは先端クロ
ップしろ、ｃ後端クロップしろ（ディスカードを含む）
である。また、数式２、３、４中のｄ1 、ｄ2 の値は夫
々対応する従来のストレート管を製造するときに決めら
れる値と同じである。In the above formulas 1, 2, 3 and 4, δ is a coefficient of thermal expansion, a is a die at a stage where the billet is housed in a container and the rear end face of the billet is in contact with the extrusion board and the front end face is in contact with the die. Length of protruding mandrel part (this part is a product pipe guide to prevent the product pipe from bending and the value depends on the product pipe size), b is the tip crop margin, and c is the rear crop margin (including discard. )
Is. The values of d 1 and d 2 in the equations 2, 3, and 4 are the same as the values determined when manufacturing the corresponding conventional straight tube.
【００１６】前述した寸法の装置及びビレットを用い
て、製品管１１、１２を製造したところ、目的の寸法の
製品管１１、１２が得られた。製品管の材質はいずれも
ＳＣＭ４４０で、ビレット加熱温度は１２００°Ｃ、押
し出しプレスは横型２０００ｔの能力のものであり、ガ
ラス潤滑を適用した。When the product pipes 11 and 12 were manufactured using the apparatus and billet having the above-mentioned dimensions, the product pipes 11 and 12 having the desired dimensions were obtained. The material of each product tube was SCM440, the billet heating temperature was 1200 ° C., the extrusion press had a horizontal capacity of 2000 t, and glass lubrication was applied.
【００１７】本発明の方法は、上記実施例の他に、他の
低合金鋼やステンレス鋼に適用できた。また、上記実施
例は、両端部にストレート管部分を有するものである
が、この部分は十分に短く形成できるので、必要に応じ
てこの部分を切り捨て部分として内径テーパ部分のみを
製品とすることも可能である。The method of the present invention can be applied to other low alloy steels and stainless steels in addition to the above embodiment. Further, in the above embodiment, the straight pipe portions are provided at both ends, but since this portion can be formed sufficiently short, it is possible to cut out this portion and use only the inner diameter tapered portion as a product if necessary. It is possible.
【００１８】[0018]
【発明の効果】本発明によれば、所定の外径で内径が両
端部で異なり途中がテーパ内径であるような、または所
定の外径で内径がテーパであるような内径テーパ管を、
従来の押し出し設備を使用し、マンドレルを新たに準備
するだけで容易に得られるから、機械部品等の材料とし
て安価に提供できる。従って、適切な用途では機械部品
とするときの切削量を少なくすることができるから、そ
の部品のコストの低減に大きく寄与できる効果を奏す
る。EFFECTS OF THE INVENTION According to the present invention, an inner diameter taper pipe having a predetermined outer diameter and a different inner diameter at both ends and a tapered inner diameter, or a taper having a predetermined outer diameter,
Since it can be easily obtained by simply preparing a new mandrel using conventional extrusion equipment, it can be provided at low cost as a material for machine parts and the like. Therefore, in an appropriate application, it is possible to reduce the amount of cutting when forming a machine part, and it is possible to greatly contribute to the reduction of the cost of the part.
【図１】本発明の実施例に使用する装置の概略の構造と
内径テーパ管の加工途中の状態を示す縦断側面図であ
る。FIG. 1 is a vertical sectional side view showing a schematic structure of an apparatus used in an embodiment of the present invention and a state in which an inner diameter tapered tube is being processed.
【図２】本発明の実施例の内径テーパ管の概略の形状を
示す縦断側面図である。FIG. 2 is a vertical cross-sectional side view showing a schematic shape of an inner diameter tapered tube according to an embodiment of the present invention.
１ ダイス ２ コンテナ ３ マンドレル ５ ステム ６ マンドレルの小径のストレート部 ７ マンドレルのテーパ部 ８ マンドレルの大径のストレート部 １１ 製品管（内径テーパ管） １２ 製品管（内径テーパ管） １３ 製品管の小内径部 １４ 製品管の内径テーパ部 １５ 製品管の大内径部 1 Die 2 Container 3 Mandrel 5 Stem 6 Small mandrel straight part 7 Mandrel taper part 8 Mandrel large diameter straight part 11 Product pipe (inner diameter taper pipe) 12 Product pipe (inner diameter taper pipe) 13 Small inner diameter of product pipe Part 14 Product inner diameter taper part 15 Product pipe large inner diameter part
Claims (1)
イスと、先端側に製品管の小内径部に対応する外径のス
トレート部を有し後部に製品管の大内径部に対応する外
径のストレート部を有し双方のストレート部の間をテー
パー部に形成したマンドレルとを用い、移動マンドレル
方式で熱間押し出し加工することを特徴とする内径テー
パ管の製造方法。1. A die having an inner diameter corresponding to the outer diameter of a predetermined product pipe, and a straight portion having an outer diameter corresponding to the small inner diameter portion of the product pipe on the tip side and corresponding to the large inner diameter portion of the product pipe at the rear portion. A method of manufacturing an inner diameter taper pipe, which comprises hot extruding by a moving mandrel method using a mandrel having a straight portion having an outer diameter that forms a taper portion between both straight portions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12339093A JPH06304644A (en) | 1993-04-26 | 1993-04-26 | Inner diameter tapered tube manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12339093A JPH06304644A (en) | 1993-04-26 | 1993-04-26 | Inner diameter tapered tube manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06304644A true JPH06304644A (en) | 1994-11-01 |
Family
ID=14859391
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12339093A Pending JPH06304644A (en) | 1993-04-26 | 1993-04-26 | Inner diameter tapered tube manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06304644A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996028264A1 (en) * | 1995-03-16 | 1996-09-19 | Mitsubishi Aluminum Co., Ltd. | Variable cross section extruding die and variable cross section extrusion molding method |
| CN100441369C (en) * | 2006-03-16 | 2008-12-10 | 钱宗富 | One-time cold extrusion forming process for motorcycle steering shaft tapered riser |
| WO2014015849A1 (en) * | 2012-07-27 | 2014-01-30 | Sms Meer Gmbh | Direct or indirect metal pipe extrusion process, mandrel for extruding metal pipes, metal pipe extruder and extruded metal pipe |
| JP2014151365A (en) * | 2013-02-13 | 2014-08-25 | Sumitomo Denko Shoketsu Gokin Kk | INDIRECT EXTRUDING METHOD OF Al ALLOY MATERIAL |
| JP2014205187A (en) * | 2013-04-16 | 2014-10-30 | トヨタ自動車株式会社 | Hollow extrusion molding device and hollow extrusion molding method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01192414A (en) * | 1988-01-26 | 1989-08-02 | Kobe Steel Ltd | Manufacture of tube with stepped inner diameter |
-
1993
- 1993-04-26 JP JP12339093A patent/JPH06304644A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01192414A (en) * | 1988-01-26 | 1989-08-02 | Kobe Steel Ltd | Manufacture of tube with stepped inner diameter |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996028264A1 (en) * | 1995-03-16 | 1996-09-19 | Mitsubishi Aluminum Co., Ltd. | Variable cross section extruding die and variable cross section extrusion molding method |
| CN100441369C (en) * | 2006-03-16 | 2008-12-10 | 钱宗富 | One-time cold extrusion forming process for motorcycle steering shaft tapered riser |
| WO2014015849A1 (en) * | 2012-07-27 | 2014-01-30 | Sms Meer Gmbh | Direct or indirect metal pipe extrusion process, mandrel for extruding metal pipes, metal pipe extruder and extruded metal pipe |
| CN104487182A (en) * | 2012-07-27 | 2015-04-01 | Sms米尔股份有限公司 | Direct or indirect metal pipe extrusion process, mandrel for extruding metal pipes, metal pipe extruder and extruded metal pipe |
| JP2015527200A (en) * | 2012-07-27 | 2015-09-17 | エスエムエス メア ゲーエムベーハー | Direct or indirect metal pipe extrusion methods, mandrels for pressing metal pipes, metal pipe extrusion machines, and extruded metal pipes |
| DE102012021787B4 (en) * | 2012-07-27 | 2017-09-21 | Sms Group Gmbh | Direct or indirect pipe extrusion process, mandrel for pressing pipes, tube extruder and extruded pipe |
| US10906077B2 (en) | 2012-07-27 | 2021-02-02 | Sms Group Gmbh | Direct or indirect metal pipe extrusion process, mandrel for extruding metal pipes, metal pipe extruder and extruded metal pipe |
| JP2014151365A (en) * | 2013-02-13 | 2014-08-25 | Sumitomo Denko Shoketsu Gokin Kk | INDIRECT EXTRUDING METHOD OF Al ALLOY MATERIAL |
| JP2014205187A (en) * | 2013-04-16 | 2014-10-30 | トヨタ自動車株式会社 | Hollow extrusion molding device and hollow extrusion molding method |
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