JPS6257713A - Eccentricity measuring instrument for extrusion press - Google Patents

Eccentricity measuring instrument for extrusion press

Info

Publication number
JPS6257713A
JPS6257713A JP19818185A JP19818185A JPS6257713A JP S6257713 A JPS6257713 A JP S6257713A JP 19818185 A JP19818185 A JP 19818185A JP 19818185 A JP19818185 A JP 19818185A JP S6257713 A JPS6257713 A JP S6257713A
Authority
JP
Japan
Prior art keywords
center
stem
container
eccentricity
fitted
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
Application number
JP19818185A
Other languages
Japanese (ja)
Inventor
Norio Sasakura
笹倉 典夫
Takara Shimokawa
下川 宝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP19818185A priority Critical patent/JPS6257713A/en
Publication of JPS6257713A publication Critical patent/JPS6257713A/en
Pending legal-status Critical Current

Links

Landscapes

  • Extrusion Of Metal (AREA)

Abstract

PURPOSE:To directly measure the mutual eccentricity of the center at the outlet and inlet sides of a stem and container by fitting a center measuring panel on the inner face of the container inlet port and outlet port and by pressing the center indicating member engaged with the stem tip thereto. CONSTITUTION:The center indicating member 4 composed of a center 4a, sleeve 4b, etc. is fitted to the tip part of a stem 3. The center measuring panels 5, 6 that the center 5a, 6c are clarified are provided attachably and detachably on the inner face of the inlet port and outlet port of a container as well. In case of the measurement of the eccentricity, the measuring panel 6 is first fitted to the container inlet port and after pressing the center indicating member 4 fitted to the stem 3 thereto, the eccentricity is found by comparing the marked position and the center 5a by removing the measuring panel 5. It is similarly measured with the measuring panel 6 at the outlet port side as wel. Consequently the eccentricity mutual at the center at the outlet and inlet sides of the stem 3 and container 10 can directly be measured and with the correction thereof with the wall deviation of the extrusion steel pipe can be reduced.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は継目無鋼管製造方法の1つである押出プレス法
におけるステムとコンテナ出入側各中心相互の偏心量を
測定する装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for measuring the amount of eccentricity between a stem and each center on the entrance and exit sides of a container in an extrusion press method, which is one of the seamless steel pipe manufacturing methods.

〔従来技術〕[Prior art]

継目無鋼管製造方法の1つである押出プレス法は以下の
如き作業工程にて行われる。まず穿孔された加熱ビレッ
トをダミーブロックとともにコンテナ前面へ搬送し、ダ
ミーブロックとビレットとにマンドレルを挿入しながら
、マンドレルに外嵌したステムでコンテナ内にビレット
とダミーブロックとを押し込む。次にステムの加圧前進
によりビレットを、一端側がプラテン入口に他端側がコ
ンテナ内面に嵌合されたグイホルダーに収容されている
ダイスと前記マンドレルとにより形成される同心円状の
開孔部より連続的にビレソI・を塑性変形させて管とな
すのである。
The extrusion press method, which is one of the methods for manufacturing seamless steel pipes, is carried out through the following work steps. First, the perforated heated billet is transported to the front of the container together with the dummy block, and while a mandrel is inserted into the dummy block and billet, the billet and dummy block are pushed into the container using a stem fitted onto the mandrel. Next, by pressurizing the stem and moving the billet forward, the billet is continuously passed through the concentric hole formed by the mandrel and the die, which is housed in a goo holder whose one end is fitted into the inlet of the platen and the other end is fitted into the inner surface of the container. The material is plastically deformed to form a pipe.

上記の作業工程においてステム中心とコンテナ入側中心
またはステム中心とコンテナ出側中心とが一致していな
い場合、製造された継目無鋼管に大きな偏肉が発生した
り、ステム外面とコンテナ内面が接触していずれかを損
傷する。そこで従来よりコンテナ中心に対するステム中
心の偏心量及び偏位方向を測定する方法が種々提案され
ている。
If the center of the stem does not match the center of the container entry side or the center of the container exit side in the above work process, a large uneven thickness may occur in the manufactured seamless steel pipe, or the outer surface of the stem may come into contact with the inner surface of the container. and damage one. Therefore, various methods have been proposed in the past for measuring the amount of eccentricity and the direction of deviation of the center of the stem with respect to the center of the container.

例えば特公昭59−6726号には以下の如く開示され
ている。押出プレスにおける加圧用の生シリンダ(ステ
ム)、コンテナホルダ(コンテナ)等の主要構成部材上
の夫々に、長袖方向の1直線上に並ぶようにターゲット
を装設する。各ターゲットは何れも透視可能な素材から
なる円形物であり、中心及びこれを中心とする同心円の
標準目盛が形成されている。また前記ターゲットより長
軸方向に適当層れた位置に望遠鏡を設置し、該望遠鏡に
て1個の主要構成部材(例えばコンテナホルダー)土に
装設されたターゲット中心に照準を合わせる。
For example, Japanese Patent Publication No. 59-6726 discloses the following. Targets are installed on each of the main structural members such as a pressurizing raw cylinder (stem) and a container holder (container) in an extrusion press so as to be lined up in a straight line in the long sleeve direction. Each target is a circular object made of transparent material, and has a center and a standard scale of concentric circles centered on the center. Further, a telescope is installed at a position appropriately layered from the target in the long axis direction, and the telescope is aimed at the center of a target installed in the soil of one main component (for example, a container holder).

そしてその際、該望遠鏡と他の主要構成部材上のターゲ
ットとの照準のずれの度合をターゲラ1−に形成されて
いる標準目盛によって、読み取ることにより偏心量を求
めるものである。
At this time, the amount of eccentricity is determined by reading the degree of misalignment between the telescope and the target on the other main components using a standard scale formed on the target camera 1-.

また特開昭55−30673号記載の如く、コンテナの
中心を原点としてコンテナ軸心に垂直な平面であるX−
Y座標系を考え、コンテナ内に挿入されたステムに向け
てX軸及びY軸方向に夫々光を投射する投光器と、コン
テナのX軸及びY軸方向夫々に基$遮光部材とを設け、
該投光器よりステムに向けて光を投射して、ステムと基
準遮光部材との間隙を通過した光を光の進行方向前方に
設けたリニアセンサーにて受光し、その受光ビット数を
計測することによりステム外周と基準点との間隙を光学
的に測定して偏心量を求める方法がある。
Also, as described in Japanese Patent Application Laid-Open No. 55-30673, X-
Considering the Y coordinate system, a projector that projects light in the X-axis and Y-axis directions toward the stem inserted into the container, and a base light shielding member in the X-axis and Y-axis directions of the container are provided,
By projecting light from the projector toward the stem, the light that has passed through the gap between the stem and the reference light shielding member is received by a linear sensor installed in front in the direction in which the light travels, and the number of bits of the received light is measured. There is a method of determining the amount of eccentricity by optically measuring the gap between the stem outer circumference and the reference point.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上述の如き2例の測定方法では、ステムとコンテナとの
相対的な位置関係から偏心量を求めているだけであり、
ステム中心とコンテナ中心との偏心量を直接把握できな
いという欠点があった。
In the two measurement methods described above, the amount of eccentricity is simply determined from the relative positional relationship between the stem and the container.
There was a drawback that the amount of eccentricity between the center of the stem and the center of the container could not be directly determined.

また加圧中にステム中心とコンテナ中心とがずれること
が偏肉発生の大きな要因の1つであるにも拘わらず、何
れも静止中での測定方法であり、加圧中におけるステム
中心とコンテナ中心との偏心量を測定していないという
欠点があった。
Furthermore, although one of the major causes of uneven thickness is the misalignment between the stem center and the container center during pressurization, both measurements are performed while the stem is stationary, and the stem center and container center during pressurization. The drawback was that the amount of eccentricity from the center was not measured.

〔問題点を解決するための手段〕[Means for solving problems]

本発明は斯かる事情に鑑みてなされたものであり、コン
テナ入口内面及びコンテナ出口内面に嵌合された中心測
定盤に、ステム先端部に嵌合された中心を誇示部材を押
圧することにより、ステムとコンテナ出入側番中心相互
の偏心量が直接測定可能な押出プレスの偏心測定装置を
提供することを目的とする。
The present invention has been made in view of such circumstances, and by pressing a member to show off the center fitted to the tip of the stem to the center measurement board fitted to the inner surface of the container entrance and the inner surface of the container outlet, It is an object of the present invention to provide an eccentricity measuring device for an extrusion press that can directly measure the amount of eccentricity between a stem and the center of a container inlet/outlet side.

本発明に係る偏心測定装置は中空加熱ビレットをその内
面にマンドレルを挿入しながらステムにてコンテナ内に
押し込み、更にステムの加圧前進によりダイスとマンド
レルとにより形成される同心円状の開孔部から前記中空
加熱ビレットを押出して管となす押出プレスにおいて、
前記ステム先端部に嵌合され、その先端部が錐状をなす
中心指示部材と、コンテナ入口内面及びコンテナ出口内
面に各嵌合され、その表面に中心が表示されている円盤
状の中心測定盤とを具備し、前記中心指示部材をiiJ
記中心測定盤に押圧し、その押圧位置と前記中心との差
に基づきステム中心とコンテナ入側中心及びステム中心
とコンテナ出側中心との偏心量を測定するように構成し
たことを特徴とする。
The eccentricity measuring device according to the present invention pushes a hollow heated billet into a container using a stem while inserting a mandrel into the inner surface of the billet, and then pressurizes and advances the stem to open a concentric hole formed by a die and a mandrel. In an extrusion press for extruding the hollow heated billet into a tube,
a center indicating member that is fitted to the tip of the stem and whose tip has a conical shape; and a disk-shaped center measuring board that is fitted to the inner surface of the container entrance and the inner surface of the container outlet, and the center is displayed on the surface thereof. and the center pointing member iiJ
The stem is pressed against the center measuring board, and the eccentricity between the stem center and the center on the container entry side and between the stem center and the center on the container exit side is measured based on the difference between the pressed position and the center. .

〔実施例〕〔Example〕

以下、本発明をその実施例を示す図面に基づき説明する
。第1図は本発明に係る偏心測定装置のコンテナ入口側
を表す断面図、第2図は同じくコ出ロ側を表す断面図で
ある。コンテナ10は、その内径がステム3の外径より
僅かに大きい円筒状のライナーl及びライナーlに外嵌
するライナーホルダー2を備えている。そしてマンドレ
ル(図示せず)に外嵌して長軸方向に移動するステム3
の加圧前進により、加熱ビレットがダイス(図示せず)
とマンドレルとにより形成される同心円状の開孔部より
コンテナホルダーに押出され、管となる。
Hereinafter, the present invention will be explained based on drawings showing embodiments thereof. FIG. 1 is a cross-sectional view showing the container inlet side of the eccentricity measuring device according to the present invention, and FIG. 2 is a cross-sectional view showing the outlet side. The container 10 includes a cylindrical liner l whose inner diameter is slightly larger than the outer diameter of the stem 3, and a liner holder 2 that fits around the liner l. A stem 3 is fitted onto a mandrel (not shown) and moves in the longitudinal direction.
The heated billet is pressed into a die (not shown).
It is extruded into a container holder through a concentric opening formed by a mandrel and a mandrel, and becomes a tube.

ステム先端部に嵌合される中心指示部材4は、センター
4a、スリーブ4b、ステムアダプタ4c、コイルスプ
リング4d及びスプリング止め4eから構成されている
。外径が基端部より先端部が大きい段付円筒状であるス
テムアダプタ4Cの基端部外周面には、雄ネジ4gが形
成されている。先端部が円錐状をなし該円錐の大径部か
ら基端側に向けて小径となるテーパーのセンター48は
、その基端にフランジ4fを先端に雄ネジ4hを有し、
その内面は、前記センター48の基端側テーパーに嵌合
するテーパー状の孔を有するスリーブ4bに、センター
48の先端部を突出させた状態で、スリーブ4b先端部
側から内嵌しである。そして嵌合したセンター48及び
スリーブ4bをステムアダプタ4cの基端部側から、フ
ランジ4fがステムアダプタ4Cの基端面にて係止され
るまで嵌挿させる。
The center indicating member 4 fitted to the tip of the stem includes a center 4a, a sleeve 4b, a stem adapter 4c, a coil spring 4d, and a spring stopper 4e. A male thread 4g is formed on the outer circumferential surface of the proximal end of the stem adapter 4C, which has a stepped cylindrical shape with an outer diameter larger at the distal end than at the proximal end. A tapered center 48 whose distal end is conical and whose diameter becomes smaller from the large diameter part of the cone toward the proximal end has a flange 4f at its proximal end and a male thread 4h at its distal end,
Its inner surface is fitted into the sleeve 4b having a tapered hole that fits into the proximal taper of the center 48 from the distal end side of the sleeve 4b, with the distal end of the center 48 protruding. Then, the fitted center 48 and sleeve 4b are inserted into the stem adapter 4c from the proximal end side until the flange 4f is locked at the proximal end surface of the stem adapter 4C.

またスリーブ4bのステムアダプタ4c外の周面には、
これを囲繞してコイルスプリング4dが配してあり、こ
の一端はステムアダプタ4cの先端面に当接しており、
また他端はスリーブ4bの先端雄ネジ4hに螺合する雌
ネジ41を有するスプリング止め4eにて抑止されるよ
うになっている。
In addition, on the outer peripheral surface of the stem adapter 4c of the sleeve 4b,
A coil spring 4d is arranged surrounding this, and one end of this is in contact with the distal end surface of the stem adapter 4c.
Further, the other end is restrained by a spring stopper 4e having a female screw 41 that is screwed into a male screw 4h at the tip of the sleeve 4b.

そして、このように構成された中心指示部材4のステム
アダプタ4cに形成された雄ネジ4gと、ステム3の先
端部内周面に形成された雌ネジ3aとを螺合して、中心
指示部材4とステム3とを結合する。
Then, the male thread 4g formed on the stem adapter 4c of the center indicating member 4 configured as described above is screwed together with the female thread 3a formed on the inner circumferential surface of the tip end of the stem 3. and stem 3 are combined.

ここで中心指示部材4を構成するステムアダプタ4c、
 スリーブ4b、 センター48は何れもステム3と同
一の軸心を自するので、第1図及び第2図において、セ
ンター48の円錐状の先端位置はステム3の中心に一致
する。
Here, a stem adapter 4c that constitutes the center indicating member 4,
Since both the sleeve 4b and the center 48 have the same axis as the stem 3, the conical tip of the center 48 coincides with the center of the stem 3 in FIGS. 1 and 2.

次にコンテナ入口内面及びコンテナ出口内面に、夫々取
付けるべき中心測定盤5,6について説明場る。段付円
盤状をなす中心測定盤5は、その小径部の径がライナー
1の内径に略等しくなっており、中心測定1t5はライ
ナー1の基端部(コンテナIO人口)にこれと同心的に
嵌合される。−力中心測定盤6は、先端部外径がグラン
ド7の内径に、基端部外径がライナーlの内径に夫々等
しく、基端部内面に段付孔を有しこれに続いて前記段付
孔より小径の貫通孔を有するホルダー6bと、ホルダー
6bの段付孔に嵌合する段付円盤状の中心盤6aとから
なり、中心盤6aをホルダー6bの段付孔に嵌合した状
態で押出プレス作業中にダイスホルダーが嵌め込まれる
部位、つまりグランド7の内周辺縁部に嵌合された後、
コンテナ10を白抜矢符方向に移動させてホルダー6b
の基端部外面をライナーl出側内面に嵌合する。中心測
定盤5及び中心盤6a夫々の大径部の端面、つまり前記
センター48の先端が接触する面には、第3図に示す如
く、中心を通り互いに直交する2直線からなる十字がマ
ーキングされており、中心測定盤5,6の中心5a、 
6cが夫々明示されている。
Next, we will explain the center measuring panels 5 and 6 that should be installed on the inner surface of the container entrance and the container outlet, respectively. The center measurement board 5, which has a stepped disc shape, has a small diameter portion approximately equal to the inner diameter of the liner 1, and the center measurement board 5 is placed at the proximal end of the liner 1 (container IO population) concentrically therewith. mated. - The force center measuring board 6 has an outer diameter equal to the inner diameter of the gland 7 at the tip end, an outer diameter equal to the inner diameter of the liner l at the base end, and a stepped hole on the inner surface of the base end. Consisting of a holder 6b having a through hole with a smaller diameter than the fixed hole, and a stepped disc-shaped center disk 6a that fits into the stepped hole of the holder 6b, the center disk 6a is fitted into the stepped hole of the holder 6b. After the die holder is fitted into the part where it is fitted during the extrusion press operation, that is, the inner peripheral edge of the gland 7,
Move the container 10 in the direction of the white arrow and attach it to the holder 6b.
Fit the outer surface of the proximal end of the liner to the inner surface of the exit side of the liner l. As shown in FIG. 3, a cross consisting of two straight lines passing through the center and orthogonal to each other is marked on the end surfaces of the large diameter portions of the center measuring plate 5 and the center plate 6a, that is, the surfaces in contact with the tips of the centers 48. The center 5a of the center measurement boards 5 and 6,
6c are clearly indicated.

ここで中心測定盤5はコンテナIOの構成部材であるラ
イナーlの入口内面に、中心測定盤6はライナーlの出
口側内面に夫々同心的に嵌合されているので、中心測定
盤5,6の中心である5a、 6cは夫々コンテナ10
人口側及び出口側の中心位置を表すことになる。
Here, the center measurement board 5 is fitted concentrically to the inner surface of the entrance of the liner l, which is a component of the container IO, and the center measurement board 6 is fitted concentrically to the inner surface of the exit side of the liner l. The centers 5a and 6c are respectively containers 10
It represents the center position on the population side and exit side.

更に第2図に示す如く、その外径がステム3の外径に略
等しい円筒状の加圧リング8がその先端面をホルダー6
bの先端面に当接して設けられており、ステム3をコン
テナ10内へ挿入するに先立ってコンテナ10内へ挿入
され、ステム3の1;I進に伴って、前進して、やがて
ホルダー6bに当接し、ごれに押圧力を与える。
Furthermore, as shown in FIG.
It is inserted into the container 10 before the stem 3 is inserted into the container 10, and moves forward as the stem 3 moves forward, and eventually the holder 6b is inserted into the container 10. and applies pressure to the dirt.

次に上述した如き構成の装置にて、ステム中心とコンテ
ナ入側中心及びステム中心とコンテナ出側中心との偏心
量を測定する具体的方法について説明する。まずコンテ
ナIO人口において中心測定盤5をライナー1に嵌合し
、また一体的に組立た中心指示部材4をステム3に螺合
する。次にステム3をコンテナ10人口側に(第1図白
抜矢符方向)向け°ζ前進させていき、中心測定盤5に
センター4aを押圧させて印をつける。センター48先
端にてつけられた印の位置はステム3中心、中心5aは
コンテナ10人側中心を夫々表しているので、印をつけ
られた中心測定515を取り外し、該印のついた位置と
前記中心5aとを比較するごとにより、ステム3中心と
コンテナ10人側中心との偏心9更には偏心方向が測定
できる。
Next, a specific method of measuring the eccentricity between the stem center and the center on the container entry side, and between the stem center and the center on the container exit side using the apparatus configured as described above will be described. First, the center measuring board 5 is fitted to the liner 1 at the container IO port, and the integrally assembled center indicating member 4 is screwed to the stem 3. Next, the stem 3 is advanced by °ζ towards the population side of the container 10 (in the direction of the white arrow in FIG. 1), and the center 4a is pressed against the center measurement board 5 to make a mark. The position of the mark made at the tip of the center 48 represents the center of the stem 3, and the center 5a represents the center of the container for 10 people. By comparing the center 5a, it is possible to measure the eccentricity 9 between the center of the stem 3 and the center of the container for 10 people, as well as the direction of eccentricity.

次にグランド7に中心測定盤6の先端側を嵌合した後、
コンテナlOを移動させて中心測定盤6の基端側をライ
ナー1の出側内面に嵌合し、またコンテナ10内に加圧
リング8を挿入した上で、ステム3をコンテナ10内に
挿入し、これをコンテナ10内口側に(第2図白抜矢符
方向)向は前進させ、中心測定盤6にセンター48先端
を押圧させ°ζ印をつけ、その後中心側定盤6を取り外
して該印のついた位置と前記中心6cとを比較すると、
該印はステム3中心、中心6cはコンテナ10内側中心
を表しているので、ステム3中心とコンテナ10出側中
心との偏心量更には偏心方向が測定できる。
Next, after fitting the tip side of the center measuring board 6 to the ground 7,
After moving the container IO and fitting the proximal end side of the center measurement board 6 to the exit side inner surface of the liner 1, and inserting the pressure ring 8 into the container 10, the stem 3 is inserted into the container 10. , move this forward toward the inside of the container 10 (in the direction of the white arrow in Figure 2), press the tip of the center 48 against the center measurement plate 6 to mark the °ζ mark, and then remove the center surface plate 6. Comparing the marked position with the center 6c,
Since the mark represents the center of the stem 3 and the center 6c represents the center inside the container 10, the amount of eccentricity between the center of the stem 3 and the center of the exit side of the container 10 as well as the direction of eccentricity can be measured.

このときステム3から加圧リング8を経てホルダー6b
に加える圧力を実際のプレス時と同じとする場合は、プ
レス時と同圧の圧力を加圧した状態におけるダイスの偏
心置火には偏心方向を測定することができる。
At this time, the holder 6b is passed from the stem 3 through the pressure ring 8.
When the pressure applied to the die is the same as that during actual pressing, the eccentric direction can be measured when the die is eccentrically placed under the same pressure as during pressing.

尚、本実施例では、中心測定盤6は、中心盤6aとホル
ダー6bとの分割構造にしたが、一体構造にしても良い
In this embodiment, the center measuring board 6 has a divided structure into the center board 6a and the holder 6b, but it may have an integral structure.

〔効果〕〔effect〕

第4図はまずステム3をコンテナ10内に挿入してステ
ム3の外周面とコンテナ10の内周面との間隙を周方向
に等しく調整するという方法にて中心合わせした後、各
圧力で加圧し、本発明に係る装置にて中心指示部材4の
センター48先端が中心測定盤6に印をつけた結果の一
例を表す測定図である。第4図において(ア)はプレフ
ィル圧のみの場合の測定結果を表し、ステムを押す水圧
シリンダーの圧力が(イ)はlookg/ca’i’ 
、  (つ)は12Qkg/cm2. (1)は140
kir/am2. (オ)は160kg/am2.  
(力)は180kg/cm2である場合の測定結果を表
す、また第4図において原点は中心測定盤6の中心6c
にあたり、・はセンター48にてつけられた印の位置を
示し、(1)内の数値は中心6cからのX軸及びY軸方
向夫々の偏心量(単位fi)を表している。
FIG. 4 shows that the stem 3 is first inserted into the container 10 and the center is aligned by adjusting the gap between the outer peripheral surface of the stem 3 and the inner peripheral surface of the container 10 equally in the circumferential direction, and then the stem 3 is applied with each pressure. FIG. 4 is a measurement diagram showing an example of the result of pressing and marking the center 48 tip of the center indicating member 4 on the center measuring board 6 using the apparatus according to the present invention. In Figure 4, (a) shows the measurement results when only the prefill pressure is used, and (b) shows the measurement results when the pressure of the hydraulic cylinder that pushes the stem is lookkg/ca'i'.
, (T) is 12Qkg/cm2. (1) is 140
kir/am2. (E) is 160kg/am2.
(Force) represents the measurement result when it is 180 kg/cm2, and in Fig. 4, the origin is the center 6c of the center measuring board 6.
In this regard, . indicates the position of the mark made at the center 48, and the numerical value in (1) indicates the eccentricity (unit: fi) in each of the X-axis and Y-axis directions from the center 6c.

第4図から理解される如く、予め無加圧の状態で中心を
合せるべく調整しておいても、加圧することにより中心
測定盤6の中心6cとセンター48にてつけられる印の
位置とのずれが生じ、また加圧力の大きさによりずれの
程度が異なる。ところがこのずれが偏肉発生の大きな要
因であるので、これを修正することにより偏肉を大幅に
減少できる。
As can be understood from FIG. 4, even if the centers are adjusted in advance without applying pressure, applying pressure will cause the center 6c of the center measuring board 6 to be aligned with the position of the mark made at the center 48. Misalignment occurs, and the degree of misalignment varies depending on the magnitude of the pressing force. However, since this deviation is a major factor in the occurrence of uneven thickness, by correcting this deviation, uneven thickness can be significantly reduced.

従って上述した如く、ステム中心とコンテナ出側中心と
の偏心量を加圧中においても測定可能にした本発明に係
る装置は、偏肉発生が防止でき、押出プレス法における
鋼管製造に関して優れた効果を奏する。
Therefore, as described above, the device according to the present invention, which is capable of measuring the eccentricity between the stem center and the center of the outlet side of the container even during pressurization, can prevent the occurrence of uneven thickness, and has an excellent effect on steel pipe manufacturing using the extrusion press method. play.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明に係る偏心測定装置のコンテナ入口側を
表す断面図、第2図は同じくコンテナ出口側を表す断面
図、第3図は中心測定盤の正面図、第4図は本発明に係
る偏心測定装置を使用した場合の測定図である。
Fig. 1 is a cross-sectional view showing the container entrance side of the eccentricity measuring device according to the present invention, Fig. 2 is a cross-sectional view also showing the container outlet side, Fig. 3 is a front view of the center measuring board, and Fig. 4 is the present invention. It is a measurement diagram when using the eccentricity measuring device according to .

Claims (1)

【特許請求の範囲】 1、中空加熱ビレットをその内面にマンドレルを挿入し
ながらステムにてコンテナ内に押し込み、更にステムの
加圧前進によりダイスとマンドレルとにより形成される
同心円状の開孔部から前記中空加熱ビレットを押出して
管となす押出プレスにおいて、 前記ステム先端部に嵌合され、その先端部 が錐状をなす中心指示部材と、コンテナ入口内面及びコ
ンテナ出口内面に各嵌合され、その表面に中心が表示さ
れている円盤状の中心測定盤とを具備し、前記中心指示
部材を前記中心測定盤に押圧し、その押圧位置と前記中
心との差に基づきステム中心とコンテナ入側中心及びス
テム中心とコンテナ出側中心との偏心量を測定するよう
に構成したことを特徴とする押出プレスの偏心測定装置
[Claims] 1. Push the hollow heated billet into the container using the stem while inserting the mandrel into the inner surface of the billet, and then push the stem forward under pressure through the concentric opening formed by the die and the mandrel. In the extrusion press for extruding the hollow heating billet into a tube, a center indicating member is fitted to the tip of the stem and has a conical tip; It is equipped with a disk-shaped center measuring board whose center is displayed on the surface, and the center indicating member is pressed against the center measuring board, and the center of the stem and the center of the container entry side are determined based on the difference between the pressed position and the center. and an extrusion press eccentricity measuring device, characterized in that it is configured to measure the amount of eccentricity between the center of the stem and the center of the outlet side of the container.
JP19818185A 1985-09-06 1985-09-06 Eccentricity measuring instrument for extrusion press Pending JPS6257713A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19818185A JPS6257713A (en) 1985-09-06 1985-09-06 Eccentricity measuring instrument for extrusion press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19818185A JPS6257713A (en) 1985-09-06 1985-09-06 Eccentricity measuring instrument for extrusion press

Publications (1)

Publication Number Publication Date
JPS6257713A true JPS6257713A (en) 1987-03-13

Family

ID=16386823

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19818185A Pending JPS6257713A (en) 1985-09-06 1985-09-06 Eccentricity measuring instrument for extrusion press

Country Status (1)

Country Link
JP (1) JPS6257713A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6233997B1 (en) * 1999-06-14 2001-05-22 Sms Eumuco Gmbh Metal-extrusion press
KR20030061650A (en) * 2002-01-15 2003-07-22 엘지전선 주식회사 The alignment tool for extruding machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6233997B1 (en) * 1999-06-14 2001-05-22 Sms Eumuco Gmbh Metal-extrusion press
KR20030061650A (en) * 2002-01-15 2003-07-22 엘지전선 주식회사 The alignment tool for extruding machine

Similar Documents

Publication Publication Date Title
FI900468A0 (en) A method of forming a leak-free joint on a rigid pipe
EP2522950B1 (en) Method and device for measuring layer thickness
JP2019515222A (en) Method of connecting a connection part of a tube for liquid phase medium or gas phase medium by a plug-in joint
JPS6257713A (en) Eccentricity measuring instrument for extrusion press
JPH07227629A (en) Method and device for manufacturing tool for fixing pipe capable of compressing cylindrical part thereof
JPH0493150A (en) Nc machine tool
US4958859A (en) Pre-assembly muff for the cutting or clamping ring of a pipe coupling
JPH0924433A (en) Expanding device of steel tube and manufacture of steel tube
JPS61105519A (en) Lens holding device and lens centering device using it
DE102010046737B4 (en) Method for applying profiling by means of cold rolling in a cold rolling machine with control
JP2004205447A (en) Jig for measuring distances between roll and object and method for measuring distance
DE2049419C3 (en) Flatness measuring device
EP0099737A2 (en) Forming helical grooves in tubes
JPH0544780Y2 (en)
CN108971999A (en) The ramps eccentric processing unit (plant) and processing method of slip ring
JPS6323865B2 (en)
JPH08254401A (en) Thread groove inspection device for nut screw
JP3324309B2 (en) Machining hole diameter measurement method with honing head and mastering
JP2680273B2 (en) Connection device between steel pipe for piping and hose
JPS59201720A (en) Working for tapered screw
JPS61186180A (en) Method for detecting butted angle of blank material in manufacture of electric welded pipe
SU1181743A1 (en) Method of producing sealing spherical die bearing
JPS57134229A (en) Manufacture of joint
SU884983A2 (en) Tool for strengthening treatment inner cylindrical surfaces
SU858984A1 (en) Method of producing and flanging holes in sheet materials