JPH0674494B2 - Manufacturing method of tempered copper pipe - Google Patents
Manufacturing method of tempered copper pipeInfo
- Publication number
- JPH0674494B2 JPH0674494B2 JP60071358A JP7135885A JPH0674494B2 JP H0674494 B2 JPH0674494 B2 JP H0674494B2 JP 60071358 A JP60071358 A JP 60071358A JP 7135885 A JP7135885 A JP 7135885A JP H0674494 B2 JPH0674494 B2 JP H0674494B2
- Authority
- JP
- Japan
- Prior art keywords
- copper pipe
- outer diameter
- manufacturing
- copper
- variation
- 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.)
- Expired - Lifetime
Links
Landscapes
- Metal Extraction Processes (AREA)
- Heat Treatment Of Articles (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は調質銅管の製造方法に関し、さらに詳しくは、
耐力のバラツキの少ない調質銅管を製造する方法に関す
る。TECHNICAL FIELD The present invention relates to a method for manufacturing a heat-treated copper pipe, and more specifically,
The present invention relates to a method for producing a heat-treated copper tube with little variation in yield strength.
［従来技術］ 従来より行なわれている銅管の調質方法には以下説明す
るような方法があるが、これには夫々に問題点が存在し
ている。即ち、 （１）直管銅管を切断、面取り後洗浄してから焼鈍を行
ない、次いで、鼓型ロールによる調質を行なう方法。[Prior Art] Conventional methods of refining copper pipes include the methods described below, but each has its own problems. That is, (1) a method in which a straight copper pipe is cut, chamfered, washed, then annealed, and then tempered by an hourglass roll.
この方法は、例えば、ローラハース炉における焼鈍のバ
ラツキにより耐力のバラツキが生じ、直管焼鈍ロット中
において1.0〜1.5kgf/mm2ものバラツキがあり、また、
圧延前の銅管外径のバラツキによる影響、調質鼓型ロー
ルのロール間の差による影響およびロール圧下量設定の
バラツキによる調質加工後に銅管に耐力のバラツキが発
生し、さらに、調質加工前の外径のバラツキとロール圧
下量のバラツキによる縮み代の変化による調質圧延後の
長さのバラツキが発生するのである。また、この方法は
生産性が低い。This method, for example, variation in yield strength due to variation in annealing in a roller hearth furnace, there is variation of 1.0 to 1.5 kgf / mm 2 in a straight tube annealing lot, and,
Effects of variations in outer diameter of copper pipe before rolling, effects of differences between rolls of tempered drum type rolls, and variations in roll reduction setting cause variations in yield strength of copper pipes after machining, and further The variation in the outer diameter before the processing and the variation in the roll reduction amount cause the variation in the shrinkage margin, which causes the variation in the length after temper rolling. Also, this method has low productivity.
（２）直管銅管（倍尺材）を洗浄後焼鈍を行ない、次い
で鼓型ロールによる調質加工を行なった後切断、面取り
をしてから洗浄する方法。(2) A method in which a straight copper pipe (double-scale material) is annealed after cleaning, then subjected to a tempering process with an hourglass roll, cut, chamfered, and then cleaned.
この方法は、調質加工前の銅管の外径のバラツキによる
影響、調質加工の鼓型ロールのロール間の差による影響
およびロール圧下量の設定のバラツキによる調質加工後
の銅管に耐力のバラツキが発生する。また、この方法も
生産性が低いのである。This method can be applied to copper pipes after tempering due to variations in outer diameter of the copper pipe before tempering, influences due to differences between rolls of drum-shaped rolls for tempering, and variations in setting of roll reduction amount. Variations in yield strength occur. This method also has low productivity.
（３）長尺でコイル状に捲回された銅管（Level Wound
Coil,LWC銅管という。）を焼鈍した後に溝ロールによる
整直を行なってから切断する方法。(3) Long, coiled copper tube (Level Wound
Coil, LWC copper tube. ) Is annealed, then straightened by groove rolls and then cut.
この方法は、焼鈍によりLWC中心と外周部に1.0〜1.5kgf
/mm2という大きな耐力のバラツキがあり、また、LWCか
ら整直する場合に銅管同志が摺れて銅管表面に疵がで
き、商品価値が劣るようになる。In this method, 1.0 to 1.5 kgf is applied to the LWC center and the outer periphery by annealing.
There is a large variation in the proof stress of / mm 2 , and when realigning from the LWC, the copper pipes slide on each other and the copper pipe surface becomes flawed, resulting in poor commercial value.
さらに、近年になって、銅管の薄肉化が指向されるよう
になり、ヘヤーピン曲げ時の皺の発生、拡管加工におけ
る管端フレアー加工精度から要求される長さのバラツキ
の低減およびその他品質上の改善すべき種々の問題があ
る。Furthermore, in recent years, there has been a trend toward thinning copper pipes, causing wrinkles when bending hairpins, reducing the variation in length required for pipe end flare processing accuracy during pipe expansion, and improving quality. There are various problems to be solved.
［発明が解決しようとする問題点］ 本発明は上記に説明したような従来における銅管の調質
方法の種々の問題点に鑑み、本発明者が鋭意研究の結果
なされたものであり、調質による耐力のバラツキが少な
く、外径、長さのバラツキが少なく、かつ、生産性の高
い調質銅管の製造方法を開発したものである。[Problems to be Solved by the Invention] The present invention has been made as a result of earnest research by the present inventor in view of various problems of the conventional method for refining a copper tube as described above. This is a method for producing a heat-treated copper pipe with little variation in yield strength due to quality, little variation in outer diameter and length, and high productivity.
［問題点を解決するための手段］ 本発明に係る調質銅管の製造方法の特徴とするところ
は、 コイル状に捲回され外径が製品寸法より大きい銅管を、
ローラダイスにより略製品外径まで無潤滑で縮径矯正し
て平均外径精度を揃えてから、連続して焼鈍を行ない、
さらに、ロールによる調質加工を行なうことにある。[Means for Solving the Problems] A feature of the method for producing a heat-treated copper pipe according to the present invention is that a copper pipe wound in a coil shape and having an outer diameter larger than the product size is
Roller die straightens the outer diameter of almost the product without lubrication to make the average outer diameter accuracy uniform, and then performs continuous annealing.
Further, it is to perform heat treatment with a roll.
本発明に係る調質銅管の製造方法について以下詳細に説
明する。The method for manufacturing a heat-treated copper tube according to the present invention will be described in detail below.
本発明に係る調質銅管の製造方法を第１図に示す概略図
により説明する。The method for manufacturing a heat-treated copper pipe according to the present invention will be described with reference to the schematic view shown in FIG.
１はコイル状に捲回された銅管（ブルコイル銅管、LWC
銅管を含む。）で、肉厚は製品寸法通りに仕上げ、外径
は製品寸法より0.1〜0.2mm大きく仕上る。1 is a copper tube wound in a coil shape (bull coil copper tube, LWC
Including copper tube. ), The wall thickness is finished according to the product dimensions, and the outer diameter is 0.1 to 0.2 mm larger than the product dimensions.
２は銅管の入側ガイドである。Reference numeral 2 is an inlet side guide for the copper pipe.
３はカセットローラダイスで、矯正圧延を行なうもので
あり、無潤滑方式により0.1〜0.2mmの縮径を行なって偏
平銅管を真円にして、平均外径精度を揃える。The numeral 3 is a cassette roller die for straightening and rolling, which reduces the diameter of 0.1 to 0.2 mm by a non-lubricating method to make the flat copper tube a perfect circle and uniform the average outer diameter accuracy.
４は脱脂装置である。4 is a degreasing device.
５は渦流探傷検査コイルである。Reference numeral 5 is an eddy current flaw detection inspection coil.
６はインダクシヨンヒーターであり、銅管の焼鈍を行な
って長尺方向の調質バラツキを少なく、均一化させる。Reference numeral 6 is an induction heater, which anneales the copper tube to reduce the uniformity of the refining in the longitudinal direction and make it uniform.
７は調質化工機で、このオフセット量により耐力値が決
められる。A refining machine 7 has a proof stress value determined by the offset amount.
その後の工程は欠陥部マーキング装置、切断機、搬出等
の工程を経て出荷されるものである。Subsequent steps are shipped after passing through the steps of a defect marking device, a cutting machine, and carrying out.
コイル状に捲回された銅管１より銅管を入側ガイド２に
供給し、カセットローラーダイス３において矯正を行な
って、オーバル状銅管を真円にして平均外径精度を揃
え、次に、脱脂装置４で矯正された銅管の外面の脱脂を
行なってから、インダクシヨンヒーター６で焼鈍を行な
い、銅管の長手方向の調質のバラツキを均一化させてか
ら、溝型ロールを縦／横と千鳥状に配置した引取機兼用
の調質加工機７で加工を行なうのであるが、この場合、
ロールのオフセット量を決めることにより調質加工後の
耐力値が決められる。The copper tube 1 is supplied from the coiled copper tube 1 to the inlet side guide 2 and straightened by the cassette roller die 3 to make the oval copper tube a perfect circle and make the average outer diameter accuracy uniform. After degreasing the outer surface of the copper pipe straightened by the degreasing device 4, annealing is performed by the induction heater 6 to uniformize the variation in the tempering of the copper pipe in the longitudinal direction, and then the grooved roll is longitudinally rolled. / The tempering machine 7, which is also arranged horizontally and in a zigzag pattern, also serves as a take-up machine. In this case,
By determining the roll offset amount, the yield strength value after temper processing is determined.
このようにして調質加工された銅管は、探傷、切断さ
れ、検査された後製品として出荷される。The copper pipe thus temper-processed is flaw-detected, cut, inspected, and then shipped as a product.
本発明に係る調質銅管の製造方法においては、ラインス
ピードは800〜900kg/Hrであって、従来の鼓型ロール調
質圧延法の200〜300kg/Hrの３〜４倍のスピードであり
生産性が極めて向上している。In the method for manufacturing a tempered copper pipe according to the present invention, the line speed is 800 to 900 kg / Hr, which is 3 to 4 times the speed of the conventional drum-shaped roll temper rolling method of 200 to 300 kg / Hr. Productivity is extremely improved.
また、第２図において、引張強さ12と耐力11とも管材の
長手方向における差は殆んどなく、また、耐力のバラツ
キＲも0.9kgf/mm2であって1.0kgf/mm2以下であり、従来
の耐力のバラツキが1.0kgf/mm2以上で、現状の3.0kgf/m
m2より著しく改善されているのである。また、結晶粒度
についても0.025mmと極めて均一化している。In Fig. 2 , there is almost no difference between the tensile strength 12 and the proof stress 11 in the longitudinal direction of the pipe material, and the variation R of the proof stress is 0.9 kgf / mm 2 and 1.0 kgf / mm 2 or less. , The conventional variation in yield strength is 1.0 kgf / mm 2 or more, and the current 3.0 kgf / m
It is a significant improvement over m 2 . Also, the crystal grain size is 0.025 mm, which is extremely uniform.
［発明の効果］ 以上説明したように、本発明に係る調質銅管の製造方法
は上記の構成を有しているものであるから、コイル状に
捲回された銅管から製品まで一貫生産が可能であり、か
つ、ラインスピードが速いので生産性に優れ、かつ、外
径精度および調質による耐力のバラツキの範囲が極めて
少なく、特に、薄肉銅管に適用した場合、品質の向上は
格段となり、また、調質加工前野銅管の外径のバラツキ
がなく、従って、調質加工の際に加工度を上げなければ
ならないという事態が避けられ、結果として、耐力を最
小限に抑えた調質銅管を製造することができ、さらに、
ローラーダイスによる縮径の程度と、調質加工の加工度
とをコントロールすることによって、所望の耐力の調質
銅管が製造できるという優れた効果を達成できる。[Effects of the Invention] As described above, since the method for manufacturing a heat-treated copper pipe according to the present invention has the above-described configuration, it is possible to perform integrated production from a copper pipe wound in a coil shape to a product. Since the line speed is fast and the line speed is high, the productivity is excellent, and the range of variations in proof stress due to outer diameter accuracy and tempering is extremely small. Especially when applied to thin-walled copper pipes, the quality is significantly improved. In addition, there is no variation in the outer diameter of the copper pipe before the tempering process, so it is possible to avoid the situation in which the workability must be increased during the tempering process. Quality copper tube can be manufactured,
By controlling the degree of diameter reduction by a roller die and the degree of tempering, it is possible to achieve the excellent effect of producing a tempered copper pipe having a desired yield strength.
第１図は本発明に係る調質銅管の製造方法の概略説明
図、第２図は耐力、引張強さおよび結晶粒度を示した図
である。 １……コイル状に捲回された銅管、２……入側ガイド、
３……カセットローラーダイス、４……脱脂装置、５…
…探傷装置、６……インダクシヨンヒーター、７……調
質加工機。FIG. 1 is a schematic explanatory view of a method for manufacturing a heat-treated copper pipe according to the present invention, and FIG. 2 is a view showing proof stress, tensile strength and grain size. 1 ... Copper tube wound into a coil, 2 ... Entry side guide,
3 ... Cassette roller die, 4 ... Degreasing device, 5 ...
... flaw detector, 6 ... induction heater, 7 ... tempering machine.
Claims (1)
きい銅管を、ローラダイスにより略製品外径まで無潤滑
で縮径矯正して平均外径精度を揃えてから、連続して焼
鈍を行ない、さらに、ロールによる調質加工を行なうこ
とを特徴とする調質銅管の製造方法。1. A copper pipe wound in a coil shape and having an outer diameter larger than the product size is continuously calibrated by a roller die to a uniform product outer diameter without lubrication to correct the average outer diameter accuracy. A method for manufacturing a tempered copper pipe, which comprises performing annealing and tempering with a roll.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60071358A JPH0674494B2 (en) | 1985-04-04 | 1985-04-04 | Manufacturing method of tempered copper pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60071358A JPH0674494B2 (en) | 1985-04-04 | 1985-04-04 | Manufacturing method of tempered copper pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61231146A JPS61231146A (en) | 1986-10-15 |
| JPH0674494B2 true JPH0674494B2 (en) | 1994-09-21 |
Family
ID=13458188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60071358A Expired - Lifetime JPH0674494B2 (en) | 1985-04-04 | 1985-04-04 | Manufacturing method of tempered copper pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0674494B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2668170B1 (en) * | 1990-10-18 | 1992-12-11 | Trefimetaux | PROCESS FOR IMPROVING THE CINTRABILITY OF HARD COPPER TUBES BY DYNAMIC HEAT TREATMENT. |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS577344A (en) * | 1980-05-10 | 1982-01-14 | Kabel Metallwerke Ghh | Method and device for treating copper pipe |
-
1985
- 1985-04-04 JP JP60071358A patent/JPH0674494B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS577344A (en) * | 1980-05-10 | 1982-01-14 | Kabel Metallwerke Ghh | Method and device for treating copper pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61231146A (en) | 1986-10-15 |
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