JPH01254314A - Pipe elongating method - Google Patents
Pipe elongating methodInfo
- Publication number
- JPH01254314A JPH01254314A JP8005988A JP8005988A JPH01254314A JP H01254314 A JPH01254314 A JP H01254314A JP 8005988 A JP8005988 A JP 8005988A JP 8005988 A JP8005988 A JP 8005988A JP H01254314 A JPH01254314 A JP H01254314A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- tube
- straight part
- fixed
- fixed die
- 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
- 238000000034 method Methods 0.000 title claims description 18
- 239000000463 material Substances 0.000 abstract description 4
- 244000145845 chattering Species 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
Landscapes
- Metal Extraction Processes (AREA)
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は伸管方法の改良に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to an improvement in a tube drawing method.
（従来の技術）
従来、管楽器特にフルート用、理化学用及び白金装置用
等の管を、縮径し乍ら伸長する伸管方法は、第２図に示
す如く管１の先端を細くし、その先端２をリベット形状
の引抜き用口金３の先端頭部３ａに嵌合係止した後、引
抜き用口金３の後端脚部３ｂをチャック４で掴み、固定
ダイス５のダイス穴５ａと該ダイス穴５ａと同心に配し
た固定プラグ６との間を通して管１を引抜き加工するも
のであった。(Prior Art) Conventionally, the method of stretching tubes for wind instruments, especially flutes, physics and chemistry instruments, platinum equipment, etc., while reducing the diameter, is to make the tip of the tube 1 thinner as shown in FIG. After fitting and locking the tip 2 to the tip head 3a of the rivet-shaped drawing cap 3, the rear end leg 3b of the drawing cap 3 is grasped with the chuck 4, and the die hole 5a of the fixed die 5 and the die hole are grasped. The pipe 1 was drawn through the space between the pipe 5a and a fixed plug 6 arranged concentrically.
（発明が解決しようとする問題点）
ところで、上記従来の伸管方法では、管１の加工率を多
くとると、即ち管径や肉厚が急激に小さくなるように加
工すると、管１が切れるものである。これは、固定ダイ
ス５の内面に比べ固定プラグ６の外面のストレート部が
長い為、管１の外面と内面の塑性変形微、材料の流れ方
が異なり、管１の外面が内面に比べ多く加工されるから
である。(Problems to be Solved by the Invention) By the way, in the conventional pipe drawing method described above, when the processing rate of the pipe 1 is increased, that is, when the pipe diameter and wall thickness are rapidly reduced, the pipe 1 breaks. It is something. This is because the straight part of the outer surface of the fixed plug 6 is longer than the inner surface of the fixed die 5, so the outer and inner surfaces of the tube 1 undergo slight plastic deformation and the flow of material is different, and the outer surface of the tube 1 is processed more than the inner surface. Because it will be done.
また固定プラグ６の外面のストレート部が長い為、潤滑
油切れ等により管との焼き付きが発生し、管１の内面に
輪状のビビリ （縞状の凹凸）が生じたり、管１の外径
が部分的に細くなったり、管１の厚みが部分的に薄くな
ったりして、寸法精度が低く品質が悪くなるものであっ
た。In addition, since the straight part of the outer surface of the fixing plug 6 is long, it may seize with the tube due to lack of lubricating oil, etc., and ring-shaped chattering (stripe-like unevenness) may occur on the inner surface of the tube 1, or the outer diameter of the tube 1 may change. The tube 1 becomes thinner in some areas, and the thickness of the tube 1 becomes thinner in some areas, resulting in low dimensional accuracy and poor quality.
その為、従来は管１の加工率を少なくとって、即ち管径
や肉厚が僅かづつ小さくなるように加工していた。従っ
て、加工工数が多く、甚だ作業性が悪かった。Therefore, in the past, the processing rate of the pipe 1 was reduced, that is, the pipe diameter and wall thickness were processed to become smaller gradually. Therefore, the number of processing steps was large, and the workability was extremely poor.
（発明の目的）
本発明は上記問題点を解決すべくなされたものであり、
管が切れたり、管の内面に輪状のビビリが発生したすせ
ず、外径や厚みの寸法精度が高く、品質の良い管が得ら
れ、しかも加工率を多くとれて作業性に優れた伸管方法
を提供することを目的とするものである。(Object of the invention) The present invention has been made to solve the above problems,
This method eliminates pipe breakage and ring-shaped chattering on the inner surface of the pipe, and produces high-quality pipes with high dimensional accuracy in outer diameter and thickness.In addition, it has a high processing rate and is easy to work with. The purpose of this invention is to provide a pipe method.
（問題点を解決するための手段）
上記問題点を解決するための本発明の伸管方法は、固定
ダイスと固定プラグとの間を通して管を引抜き加工する
伸管方法に於いて、前記固定ダイスの内面形状をストレ
ート部の短い内面形状となし、前記固定プラグの外面形
状をストレート部の短い固定ダイスの内面形状と略同−
になして、この固定ダイスと固定プラグとの間に管を通
して引抜き加工することを特徴とするものである。(Means for Solving the Problems) A pipe drawing method of the present invention for solving the above problems includes a pipe drawing method in which a pipe is drawn through a space between a fixed die and a fixed plug. The inner shape of the fixing plug is the same as the short inner shape of the straight part, and the outer shape of the fixing plug is approximately the same as the inner shape of the fixing die with the short straight part.
This is characterized in that a pipe is passed between the fixed die and the fixed plug for drawing.
（作用）
上述の如く本発明の伸管方法は、固定ダイスの内面形状
と固定プラグの外面形状が略同−にした両者の間に管を
通して引抜き加工するので、管の外面と内面の抵抗が等
しく、塑性変形量、材料の流れ方が略同じになる為、加
工率を多くとれ、しかも管が切れたりすることが無い。(Function) As described above, in the tube drawing method of the present invention, the tube is drawn between the fixed die and the fixed plug, which have approximately the same inner surface shape and the same outer surface shape, so that the resistance between the outer and inner surfaces of the tube is reduced. Similarly, since the amount of plastic deformation and the flow of the material are approximately the same, the processing rate can be increased and the pipe will not break.
また引抜き加工に於いて固定プラグのストレート部が固
定ダイスの内面のストレート部と略同様に短いので、管
は焼き付きが生ぜず、従って管の内面に輪状のビビリが
（縞状の凹凸）が生ぜず、外径や厚みの寸法精度が高く
、品質の良好な管が得られる。In addition, during the drawing process, the straight part of the fixed plug is as short as the straight part on the inner surface of the fixed die, so the tube does not seize, and therefore ring-shaped chattering (stripe-like unevenness) occurs on the inner surface of the tube. First, a tube of good quality with high dimensional accuracy in outer diameter and thickness can be obtained.
（実施例）
本発明による伸管方法の一実施例を図によって説明する
と、第１図に示す如く超硬より成る固定ダイス５のダイ
ス穴５ａの内面形状を直径２１．３ｍｍのストレート部
５ｂを長さ３ｍｍ、テーパ部５Ｃを４０ｍｍＨの円弧と
なし、開口径４０ｍｍとなした。また超硬より成る固定
プラグ６の外面形状を、直径２０ｍｍのストレート部６
ａを長さ３ｍｍ、テーパ部６ｂを４０ｍｍＲの円弧とな
し、その端の径を１８ｍｍとなした。そしてこの固定ダ
イス５と固定プラグ６との間に、Ｐｄより成る外径２４
ｎ＋ｍ、内径２２ｍｍの管１を通して引抜き加工した処
、外径２１．３＋＋＋＋ｎ、内径２０ｍｍの管１′を得
た。(Embodiment) An embodiment of the pipe drawing method according to the present invention will be described with reference to the drawings. As shown in FIG. The length was 3 mm, the tapered portion 5C was an arc of 40 mmH, and the opening diameter was 40 mm. In addition, the outer shape of the fixing plug 6 made of carbide was changed to a straight part 6 with a diameter of 20 mm.
A had a length of 3 mm, the tapered portion 6b had a radius of 40 mm, and the diameter of the end was 18 mm. Between the fixed die 5 and the fixed plug 6, there is provided an outer diameter 24 made of Pd.
The tube 1 having an outer diameter of 21.3+++n and an inner diameter of 20 mm was obtained by drawing through the tube 1 having an inner diameter of 22 mm.
一方従来例について説明すると、第２図に示す如く超硬
より成る固定ダイス５のダイス穴５ａの内面形状を直径
２１．３ｍｍのストレート部５ｂを長さ３ｍｍ、テーパ
部５ｃを４ｍｍＲの円弧となし、開口径を４０ｍｍとな
した。また超硬より成る固定プラグ６の外面形状を、直
径２Ｏｆｆ１ｍ、長さ８ｍｍのストレート部６ａ′のみ
となした。そしてこの固定ダイス５と固定プラグ６との
間に、Ｐｄより成る外径２４ｍ、内径２２ｍｍの管１を
通して外径２１．３ｍｍ、内径２０＋ｎｍに引抜き加工
しようとしたが、管１が切れて引抜き加工できなかった
。On the other hand, to explain the conventional example, as shown in Fig. 2, the inner surface shape of the die hole 5a of the fixed die 5 made of carbide is 21.3 mm in diameter, the straight part 5b is 3 mm long, and the tapered part 5c is an arc with a radius of 4 mm. , the opening diameter was set to 40 mm. Further, the outer surface shape of the fixing plug 6 made of carbide is only a straight portion 6a' with a diameter of 2 Off 1 m and a length of 8 mm. Then, an attempt was made to pass a Pd tube 1 with an outer diameter of 24 m and an inner diameter of 22 mm between the fixed die 5 and the fixed plug 6, and to draw it to an outer diameter of 21.3 mm and an inner diameter of 20+ nm, but the tube 1 was cut and the drawing process was not completed. could not.
この従来法では引抜き加工できなかった管１の内面に輪
状のビビリ （縞状の凹凸）が発生し、しかも外径や肉
厚が長手方向でばらつきが発生していた。これに対し前
記実施例で得られた管ビにはそれらの発生が全く見られ
なかった。With this conventional method, ring-shaped chattering (stripe-like unevenness) occurred on the inner surface of the tube 1, which could not be drawn, and furthermore, the outer diameter and wall thickness varied in the longitudinal direction. On the other hand, no such occurrence was observed in the pipes obtained in the above examples.
（発明の効果）
以上の説明で判るように本発明の伸管方法によれば、管
の外面と内面の抵抗が等しくなって、塑性変形量、材料
の流れ方が略同じになる為、加工率を多くとれ、管が切
れたりすることが無い。従って、加工時間が短縮でき、
生産性が向上する。(Effects of the Invention) As can be seen from the above explanation, according to the pipe drawing method of the present invention, the resistance on the outer and inner surfaces of the pipe becomes equal, and the amount of plastic deformation and the flow direction of the material are almost the same, so that You can get a high ratio and the pipe will not break. Therefore, machining time can be shortened,
Productivity improves.
また本発明の伸管方法によれは、管は焼き付きが生ぜず
、従って管の内面に輪状のビビリ （縞状の凹凸）が生
ぜず、外径や厚みの寸法精度が高く、品質良好な管が得
られるという優れた効果がある。Furthermore, according to the tube drawing method of the present invention, the tube does not seize, and therefore ring-shaped chatter (striped irregularities) does not occur on the inner surface of the tube, and the dimensional accuracy of the outer diameter and thickness is high, and the tube is of good quality. It has the excellent effect of providing
第１図は本発明の伸管方法の一実施例を示す要部断面図
、第２図は従来の伸管方法を示す断面図である。
出願人 田中貴金属工業株式会社FIG. 1 is a sectional view of a main part showing an embodiment of the pipe drawing method of the present invention, and FIG. 2 is a sectional view showing a conventional pipe drawing method. Applicant Tanaka Kikinzoku Kogyo Co., Ltd.
Claims (1)
加工する伸管方法に於いて、前記固定ダイスの内面形状
をストレート部の短い内面形状となし、前記固定プラグ
の外面形状をストレート部の短い固定ダイスの内面形状
と略同一になして、この固定ダイスと固定プラグとの間
に管を通して引抜き加工することを特徴とする伸管方法
。1. In a pipe drawing method in which a tube is drawn through between a fixed die and a fixed plug, the inner surface shape of the fixed die is the short inner shape of the straight part, and the outer shape of the fixed plug is the short inner shape of the straight part. A method for drawing a tube, which is characterized in that the inner shape of the fixed die is substantially the same as that of the fixed die, and a tube is passed between the fixed die and the fixed plug for drawing processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8005988A JPH01254314A (en) | 1988-03-31 | 1988-03-31 | Pipe elongating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8005988A JPH01254314A (en) | 1988-03-31 | 1988-03-31 | Pipe elongating method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01254314A true JPH01254314A (en) | 1989-10-11 |
Family
ID=13707662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8005988A Pending JPH01254314A (en) | 1988-03-31 | 1988-03-31 | Pipe elongating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01254314A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995028239A1 (en) * | 1994-04-14 | 1995-10-26 | Sumitomo Metal Industries, Ltd. | Bright-annealed highly smooth inner surface stainless steel pipe and method of manufacturing the same |
-
1988
- 1988-03-31 JP JP8005988A patent/JPH01254314A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995028239A1 (en) * | 1994-04-14 | 1995-10-26 | Sumitomo Metal Industries, Ltd. | Bright-annealed highly smooth inner surface stainless steel pipe and method of manufacturing the same |
| US6029714A (en) * | 1994-04-14 | 2000-02-29 | Sumitomo Metal Industries, Ltd. | Stainless steel pipe of bright annealing finish type, having highly-smoothed inner surface and method for producing the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20040179914A1 (en) | Thread forming tool with annular ridge | |
| JPS6140440B2 (en) | ||
| JPH01254314A (en) | Pipe elongating method | |
| JP5694720B2 (en) | Manufacturing method of grooved bolt | |
| EP2085198A1 (en) | Die for molding honeycomb structure body and method of producing the same | |
| EP0326085B1 (en) | Production of nozzle member | |
| US2682848A (en) | Forming tool for reducing stock | |
| JP2001328016A (en) | Twist drill | |
| CN210080745U (en) | Cutter assembly for machining inner wall groove of hole | |
| JP2000107832A (en) | Manufacture of nozzle for welding | |
| JPH07214113A (en) | Method for preventing generation of burr at the time of piercing pipe material with piercer | |
| JPS6257807A (en) | Drill | |
| JPH07236912A (en) | Stretching tool | |
| US3838820A (en) | Welding and cutting torch tips | |
| SU749520A1 (en) | Method of producing thread | |
| CN214601976U (en) | Screw rod breakage preventing tool for processing harness cord by using thin tungsten screw rod | |
| KR101016854B1 (en) | Round bar with diamond pattern manufacturing method for the crown of watch by thread rolling | |
| CN215788210U (en) | A frock clamp for processing of flow temperature sensor casing | |
| CN113427210B (en) | Manufacturing process of gas nozzle, gas nozzle and oxygen-deficient protection device | |
| JP2001246421A (en) | Metal tube manufacturing method | |
| CN205380137U (en) | Steel pipe is perforated with top of perforating | |
| JP2022001390A (en) | Straight collet | |
| JP2005205557A (en) | Tap | |
| JPS6390388A (en) | Flux cored wire for welding multiple tube and its manufacture | |
| JPH04351239A (en) | Manufacture of nut or the like and hexagonal steel pipe used for manufacture of the same |