JPS59166627A - Heat treatment of pc steel twisted wire - Google Patents
Heat treatment of pc steel twisted wireInfo
- Publication number
- JPS59166627A JPS59166627A JP58041110A JP4111083A JPS59166627A JP S59166627 A JPS59166627 A JP S59166627A JP 58041110 A JP58041110 A JP 58041110A JP 4111083 A JP4111083 A JP 4111083A JP S59166627 A JPS59166627 A JP S59166627A
- Authority
- JP
- Japan
- Prior art keywords
- wires
- steel
- steel twisted
- wire
- capstan
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/06—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires
- C21D8/08—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of rods or wires for concrete reinforcement
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
- C21D9/60—Continuous furnaces for strip or wire with induction heating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
Description
【発明の詳細な説明】
（技術分野）
本発明は、プレストレストコンクｌ） −１−（以下、
ＰＣと称す）などに使用されるＰＣ鋼撚線（ストランド
）のストレイン、テンパリング処理方法（（関するもの
である。Detailed Description of the Invention (Technical Field) The present invention relates to prestressed concrete l) -1- (hereinafter referred to as
This relates to a method for straining and tempering strands of PC steel used in products such as PC.
（背景技術）
ｐｃ鋼線又はｐｃ鋼撚線の低すラクセ＝ショア４ｄｌ′
性を得るために、従来よシ鋼線又は鋼撚線に引張りひず
みを与えながらブルーイング熱処理する、いわゆるスト
レイン、テンパリンク（Ｓｔｒａｉｎｔｅｍｐｅｒｉｎ
ｇ ）処理が行なわれている。(Background technology) Low luxe = Shore 4dl' of PC steel wire or PC stranded wire
Conventionally, steel wires or stranded steel wires are subjected to bluing heat treatment while being subjected to tensile strain in order to obtain the desired properties.
g) Processing is taking place.
この処理装置としては、第１図に例を示すような装置が
使用されている。図において’１２ａおよび２ｂは、鋼
線又は鋼撚線１の進行方向５０前後に配置された張力付
加キャプスタ／で、それらの間に加熱装置３および冷却
装置４が設置されている。As this processing device, a device as shown in FIG. 1 is used. In the figure, reference numerals 12a and 2b are tension-applying capstors/capstors disposed before and after the traveling direction 50 of the steel wire or stranded steel wire 1, and a heating device 3 and a cooling device 4 are installed between them.
キャプスタン２ｂの速度（ｉ７２ａの速度より１〜１．
５％速くして線又は撚線１に引張ひずみ全力えながら３
００〜４００°Ｃに加熱し、続いて冷却することにより
線又は撚線ｌにストレイン、テンパリング処理か施され
る。The speed of the capstan 2b (1 to 1.
3 while increasing the tensile strain to the wire or strand 1 at 5% speed.
The wires or strands are subjected to straining and tempering treatments by heating to 00 to 400°C and subsequently cooling.
この場合、熱処理を連続的に能率良く行なうためには、
′Ａ線又は鋼撚線を接続して装置に連続的に通す必要か
あるが、鋼撚線の場合、従来溶接式により接続するか、
又はクサビグリップ式で接続していた。In this case, in order to perform heat treatment continuously and efficiently,
'It is necessary to connect A wire or steel stranded wire and pass it through the equipment continuously, but in the case of steel stranded wire, it can be connected by conventional welding method, or
Or they were connected using a wedge grip type.
しかし溶接式では、溶接部の強度が低く、処理時、母材
の鋼撚線の引張荷重の４０〜５０％の引張張力がかかる
ため、この張力により破断する。又クザビグリソプ式で
は、グリップ部の外径が大きくなり、特に加熱装置３か
高周波加熱の場合、加熱コイルの内径が大きくなるため
、加熱効率が低下する。又張力付加キャプスタンが巻付
キャプスタンの場合、溝幅の大きいキャプスタンを要し
、又ギャタビラキャプスタンの場合、大きい外径のグリ
ップ部を上下から押しはさむことがてきず、張力の付加
が不可能となる。However, in the welding method, the strength of the welded part is low, and during processing, a tensile tension of 40 to 50% of the tensile load of the steel stranded wire of the base material is applied, and this tension causes breakage. Furthermore, in the Kusavi Grisop type, the outer diameter of the grip portion becomes large, and especially in the case of the heating device 3 or high-frequency heating, the inner diameter of the heating coil becomes large, resulting in a decrease in heating efficiency. In addition, if the tension applying capstan is a wrapped capstan, a capstan with a large groove width is required, and in the case of a gutter capstan, it is difficult to press the large outer diameter grip from above and below, making it difficult to apply tension. becomes impossible.
（発明の開示）
本発明は、」二連の問題点を解決するため成されたもの
で、鋼撚線の接続部の外径を余り増加せせずに、しかも
充分な引張荷重を有し、処理中接続部で破断ず不ことな
く、又例えば高周波加熱コイルの内径を小さくして加熱
効率を向上し得るＰＣ鋼撚線のストレイン、テンパリン
グ処理方法を提供せんとするものである。(Disclosure of the Invention) The present invention has been made to solve two problems, and has a sufficient tensile load without significantly increasing the outer diameter of the connecting portion of the stranded steel wire. It is an object of the present invention to provide a method for straining and tempering stranded PC steel wire, which does not cause breakage at the joints during treatment and can improve heating efficiency by reducing the inner diameter of a high-frequency heating coil, for example.
本発明は、ｐｃ鋼撚線に連続的にストレイン、テンパリ
ング処理を施す方法において、接続すべき鋼撚線のそれ
ぞれ端末部をつき合せ、つき合せ部を含む所定長さの前
記鋼撚線の外周に、予めらせん状に成形された１本以上
の線材全らせん状に巻付けて前記鋼撚線を接続して、処
理することを特徴とするＰＣ鋼撚線の熱処理方法である
。The present invention provides a method for continuously subjecting PC steel stranded wires to strain and tempering treatments, in which the respective end portions of the steel stranded wires to be connected are brought together, and the outer periphery of the steel stranded wires of a predetermined length including the butted portions is provided. This is a heat treatment method for PC steel strands, which is characterized in that the steel strands are connected by winding one or more pre-spiralized wires in a complete helical shape, and then processing the steel strands.
以下、本発明を図面を用いて実施例により説明する。Hereinafter, the present invention will be explained by examples using the drawings.
本発明に用いられるストレイン、テンバリング処理装置
は前述の第１図に示したものと同じであるか、この構造
に限定されるものではない。張力付加キャプスタン２ａ
、２ｂには、巻付溝を有するキャプスタン、キャタピラ
式キャプスタン等か用いられ、キャプスタン２ｂの方が
２８に比べて１〜１８５％速度が速く、駆動され、それ
らの間の鋼撚線１に所定の引張ひずみが力えられる。The strain and tensile processing apparatus used in the present invention is the same as that shown in FIG. 1 described above, or is not limited to this structure. Tension adding capstan 2a
, 2b, a capstan with a winding groove, a caterpillar type capstan, etc. is used, and the speed of capstan 2b is 1 to 185% faster than that of capstan 28, and the steel stranded wire between them is used. 1 is subjected to a predetermined tensile strain.
加熱装置３の加熱方式は、高周波加熱、直接通電加熱、
ガス焚加熱などのいずれでも良いが、加熱温度の信頼性
の高い高周波加熱方式が望ましい。The heating method of the heating device 3 is high frequency heating, direct current heating,
Any method such as gas-fired heating may be used, but a high-frequency heating method with high reliability in heating temperature is preferable.
このような処理装置に鋼撚線Ｉを連続的に通して処理す
る場合、鋼撚線１の単長に制限かあるので、これ全接続
する必要がある。本発明方法ではこの鋼撚線の接続を次
のようにして行々う。When the steel strands I are continuously passed through such a processing device for processing, there is a limit to the single length of the steel strands 1, so it is necessary to connect all of them. In the method of the present invention, the stranded steel wires are connected as follows.
第２図は本発明方法の実施例により接続された鋼撚線の
接続部の例を示す側面図である。本発明方法では、先ず
接続すべき鋼撚線１，１′の端末部をつき合せ、つき合
せ部を含む所定長さの鋼撚線ｌと１′の部分に、予めら
せん状に成形された１本又は複数本の線材６（図では２
組）をらせん状に巻イ」ける。FIG. 2 is a side view showing an example of a joint of stranded steel wires connected according to an embodiment of the method of the present invention. In the method of the present invention, first, the end portions of the steel strands 1 and 1' to be connected are brought together, and a predetermined length of the steel strands l and 1', including the abutting portions, is preformed into a spiral shape. One or more wire rods 6 (2 in the figure)
Wrap the wire into a spiral.
この巻付ける線材６は第３図に示すように、予めらせん
状に成形されたもので、複数本か同しピンチ、同し内径
に成形され、並へて接着されており、鋼撚線１，１′に
巻付けた時、筒状体を形成するようになっている（第３
図下図）。このらせんの内径りは鋼撚線１，１′の外径
より稍々（例、０〜ｌ ｍｍ ）小さいことが車重しく
、これにより内側の鋼撚線をしめ付ける。巻付ける１本
以上の線材６の合計の引張荷重は、処理時付加される引
張張力よりも大きくなるように太さ、本数が選はれる。As shown in Fig. 3, the wire rod 6 to be wound is formed in advance into a spiral shape, and a plurality of wire rods are formed into the same pinch and the same inner diameter, and are glued side by side. , 1', it forms a cylindrical body (the third
Figure below). The inner diameter of this spiral is slightly smaller (for example, 0 to 1 mm) than the outer diameter of the steel strands 1, 1', which makes the vehicle heavier, and this tightens the inner steel strands. The thickness and number of wire rods 6 are selected so that the total tensile load of one or more wire rods 6 to be wound is greater than the tensile tension applied during processing.
又それを巻付ける長さは、処理時付加される引張張力１
て、らせん状線材６による鋼撚線ｌ、１′の把持力を充
分持つような所定の長さに１６められる。Also, the length of winding it is determined by the tensile tension 1 applied during processing.
The helical wire rod 6 is set to a predetermined length 16 such that the steel strands 1 and 1' can be sufficiently gripped by the helical wire rod 6.
この把持力を増加させる目的で、必要によりらせん状線
材６の奉伺は面に摩擦係数を増やすだめの微細粒状物（
例、金剛砂、アルミナ等）全接着しても良い。In order to increase this gripping force, if necessary, the helical wire rod 6 may be covered with fine particles (
(e.g., diamond sand, alumina, etc.) may be completely bonded.
々お、接続部の進行方向５の先端に、第２図に示すよう
にガイドリング７をはめこみ、接続部すの先端部か高周
波加熱コイル等にひつか力・らないようにすることが好
捷しい。It is preferable to fit a guide ring 7 into the tip of the connecting portion in the direction of travel 5, as shown in Fig. 2, to prevent the tip of the connecting portion from pulling against the high-frequency heating coil, etc. It's scary.
このようにして鋼撚線］、、１”ｋ接続すると、４妾続
部の外径の増加は、らせん状線材６のタ１−径の２倍だ
けの僅かですみ、張力付加キャプスタン２ａ。When the steel stranded wire is connected in this way, the increase in the outer diameter of the 4-connection portion is only twice the diameter of the helical wire 6, and the tension-applying capstan 2a .
２ｂ’ｌｃ−改造せずに張力付加が可能であり、充分な
土巴持力と引張荷重を有するので、処理Ｂ９の張ブコイ
マ１力ロ時接続部が破断しない。又高周波加熱の場合、
従来のクサビ式グリ・ンプに比べ接続部外怪妙・ｌ」・
さいので、加熱コ・イルの内径を小さくすること力）で
き、加熱効率か良い。2b'lc - It is possible to add tension without modification, and it has sufficient soil holding power and tensile load, so the connection part will not break when the tension bulge of treatment B9 is applied with one force. Also, in the case of high frequency heating,
The connection part is strange compared to the conventional wedge type grip.
Since it is small, it is possible to reduce the inner diameter of the heating coil (power), and the heating efficiency is good.
（実施例）
外径１２．７ ｍｍのＰＣ鋼撚線を本発明方法により処
理した。(Example) A PC steel stranded wire having an outer diameter of 12.7 mm was treated by the method of the present invention.
３．５ ｍｍ ｆの鋼線を予めらせんピッチ］０’０龍
、らせん内径１２．５ｍｍのらせん状に成形し、巻イ」
け長さ１５ｍに切断した線材６の７本を接着剤で接着し
て一体化した。第２図に示すように鋼撚線のつき合せ部
を含む外周に上述の一体化した線材２組をらせん状に奉
伺けた。接続部の進行方向の先端に第２図に示す寸法の
ガイドリング７をはめこんだ。A steel wire of 3.5 mm f was preformed into a spiral shape with a spiral pitch of 0'0 and an inner diameter of 12.5 mm, and wound.
Seven wire rods 6 cut to a length of 15 m were bonded together with an adhesive to be integrated. As shown in FIG. 2, the above-mentioned two sets of integrated wire rods were placed in a spiral shape around the outer periphery of the steel stranded wires, including the mating portions. A guide ring 7 having dimensions shown in FIG. 2 was fitted into the leading end of the connecting portion in the direction of travel.
この接続部の引張荷重は＋ ９，３００ Ｋｙ以上で、
母材の鋼撚線の引張荷重１９，３００Ｋｇ１越えるもの
であった。The tensile load of this connection is +9,300 Ky or more,
The tensile load exceeded 19,300 kg1 of the steel stranded wire of the base material.
このように接続した鋼撚線を第１図に示す装置によりス
トレイン、テンパリフグ処理した結果、処理中、破断す
ることなく、所定の温度、引張ひずみが付加され、全長
に亘り所望の低しラクセーンヨン特性を有するＰＣ鋼撚
線を得た。As a result of straining and tempering the steel strands connected in this way using the apparatus shown in Figure 1, the wires do not break during the treatment and are subjected to tensile strain at a predetermined temperature, resulting in the desired low laxation properties over the entire length. A PC steel stranded wire having the following properties was obtained.
（発明の効果）
」−述のように構成された本発明のＰＣ鋼撚線の熱処理
方法は次のような効果がある。(Effects of the Invention) The heat treatment method for PC steel stranded wire of the present invention configured as described above has the following effects.
（イ） 接続すべき鋼撚線のそれぞれ端末部をつき合せ
、つき合せ部を含む所定長さの前記鋼撚線の外周に、予
めらせん状に成形された１本以上の線材全らせん状に巻
付けて前記鋼撚線を接続して、ストレイン、テンパリン
グ処理するから、巻付けた線材の鋼撚線把持力か大きく
、かつその線材の合計引張荷重を鋼撚線の引張荷重以」
二にすることにより、接続部の強度を高くすることかで
きるので、処理時の伺加張力て接続部か破断し々い。(b) Match the end parts of the steel stranded wires to be connected, and place one or more wires pre-formed into a spiral shape around the outer periphery of the steel stranded wire of a predetermined length including the butted parts. Since the steel stranded wires are connected by winding and subjected to strain and tempering treatment, the steel stranded wire gripping force of the wrapped wire is large, and the total tensile load of the wire is greater than the tensile load of the steel stranded wire.
By doing so, the strength of the joint can be increased, so that the joint is unlikely to break due to the applied tension during processing.
（ロ）接続部の外径の増加は僅かであるので、張力付加
キャプスタンを改造せずに張カイ・１加か可能である。(b) Since the increase in the outer diameter of the connecting portion is slight, it is possible to increase the tension without modifying the tension-applying capstan.
（ハ） 高周波加熱の場合、接続部の外径か小さいので
、加熱コイルの内径を小さくすることができ、加熱効率
か向上する。(c) In the case of high-frequency heating, since the outer diameter of the connecting portion is small, the inner diameter of the heating coil can be reduced, improving heating efficiency.
第１図はストレイン、テンパリング処理装置の例を示す
構成図である。
第２図は本発明方法の実施例により接続された鋼撚線の
接続部の例を示す側面図である。
第３図は第２図に示すらせん状成形線材の例を示す側面
図および横断面図である。
１．１′・・・鋼撚線、２ａ、２ｂ・・・張力付加キャ
プスタン、３ 加熱装置、４・・・冷却装置、５・・・
進行方向、６・・線材、７・・ガイドリング。
代理人 弁理士 青 木 秀 實■FIG. 1 is a block diagram showing an example of a strain and tempering processing apparatus. FIG. 2 is a side view showing an example of a joint of stranded steel wires connected according to an embodiment of the method of the present invention. 3 is a side view and a cross-sectional view showing an example of the spirally formed wire shown in FIG. 2. FIG. 1.1'... Steel stranded wire, 2a, 2b... Tension adding capstan, 3 Heating device, 4... Cooling device, 5...
Traveling direction, 6... wire rod, 7... guide ring. Agent Patent Attorney Hide Minoru Aoki■
Claims (1)
グ処理を施す方法において、接続すべき鋼撚線のそれぞ
れ端末部をつき合せ、つき合せ部を含む所定長さの前記
鋼撚線の外周に、予めらせん状に成形された１本以上の
線材子らせん状に巻付けて前記鋼撚線を接続して、処理
することを特徴とするＰＣ鋼撚線の熱処理方法。(1) In a method of continuously subjecting PC steel stranded wires to strain and tempering treatments, the respective end portions of the steel stranded wires to be connected are brought together, and the outer periphery of the steel stranded wires of a predetermined length including the butted portions is A method for heat treatment of stranded PC steel wire, characterized in that the stranded steel wires are connected by winding one or more pre-formed wire rods into a spiral shape and then being processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58041110A JPS59166627A (en) | 1983-03-11 | 1983-03-11 | Heat treatment of pc steel twisted wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58041110A JPS59166627A (en) | 1983-03-11 | 1983-03-11 | Heat treatment of pc steel twisted wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59166627A true JPS59166627A (en) | 1984-09-20 |
Family
ID=12599333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58041110A Pending JPS59166627A (en) | 1983-03-11 | 1983-03-11 | Heat treatment of pc steel twisted wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59166627A (en) |
-
1983
- 1983-03-11 JP JP58041110A patent/JPS59166627A/en active Pending
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