JPH01220384A - Heating device for pipe - Google Patents
Heating device for pipeInfo
- Publication number
- JPH01220384A JPH01220384A JP4540388A JP4540388A JPH01220384A JP H01220384 A JPH01220384 A JP H01220384A JP 4540388 A JP4540388 A JP 4540388A JP 4540388 A JP4540388 A JP 4540388A JP H01220384 A JPH01220384 A JP H01220384A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- power supply
- heated
- contact
- current
- 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.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 36
- 230000000694 effects Effects 0.000 abstract description 12
- 238000005452 bending Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
Ａ、産業上の利用分野
本発明はパイプを局部的に加熱するためのパイプの加熱
装置に関する。DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a pipe heating device for locally heating a pipe.
Ｂ０発明の概要
本発明はパイプを局部的に加熱するためのパイプの加熱
装置において、
パイプの被加熱部の両端に接触して交流を流す接触子と
、前記被加熱部に沿って近接して配設された接触子の給
電リードとを備えることにより、熱効率を高めて急速な
局部加熱を可能とし、局部的な温度差を利用した湾曲加
工の加工精度を高め、被加熱部の加熱範囲の調整を容易
にするものである。B0 Summary of the Invention The present invention provides a pipe heating device for locally heating a pipe, which includes: a contactor that contacts both ends of a heated portion of the pipe to flow an alternating current; By providing a power supply lead for the contact, it is possible to increase thermal efficiency and enable rapid local heating, improve the processing accuracy of bending using local temperature differences, and increase the heating range of the heated part. This facilitates adjustment.
Ｃ８従来の技術
一般に、鋼管等のパイプを湾曲させる際に、冷間加工を
行うと曲率半径を小さくできない。また湾曲する部分全
体を加熱すると、湾曲部のパイプが偏平になったり外側
が減肉してしまう。C8 Prior Art Generally, when bending a pipe such as a steel pipe, the radius of curvature cannot be reduced if cold working is performed. Furthermore, if the entire curved section is heated, the pipe at the curved section will become flat or the outside wall will become thinner.
そこで、第９図に示すように、直線状のペイプ２の片側
部分だけを局部加熱し反対側部分は冷たい状態として、
この被加熱部３に中子２２を当接するとともに、その両
側部分を押し具２３．２３によって押圧して曲げ加工す
ることが考えられる。Therefore, as shown in FIG. 9, only one side of the linear tape 2 is locally heated and the other side is kept cold.
It is conceivable to bring the core 22 into contact with this heated portion 3 and to press both sides of the core 22 with push tools 23 and 23 to bend the core 22 .
この方法によれば、温度差による高温強度の違いにより
第１θ図に示すように、湾曲部２ａの外側部２ｂの減肉
を防止して内側部２ｃを増肉させ、加工後の真円度を確
保するとともに、冷間加工に比し、−挙に小さな曲率（
Ｒ＜２Ｄ）に湾曲加工することができる。According to this method, due to the difference in high temperature strength due to the temperature difference, as shown in Fig. 1θ, thinning of the outer part 2b of the curved part 2a is prevented and the inner part 2c is increased, and the roundness after processing is improved. In addition to ensuring a much smaller curvature (
It can be curved to R<2D).
このようにパイプの片側だけを局部加熱する加熱装置が
従来から知られている。Heating devices that locally heat only one side of a pipe have been known in the past.
第２図に示すように、パイプの加熱装置ｌは金属製パイ
プ２の片側に誘導子２４を近接して配置し、この誘導子
２４に交流電流を流して誘導加熱していた。As shown in FIG. 2, in the pipe heating device 1, an inductor 24 is placed close to one side of a metal pipe 2, and an alternating current is passed through the inductor 24 to perform induction heating.
Ｄ６発明が解決しようとする課題
しかしながら、この従来技術によれば、以下に述べる間
層点があった。D6 Problems to be Solved by the Invention However, this prior art has the following interlayer points.
（１）加熱効率が悪く、コイルロスが大きいため局部加
熱を急速にできない。(1) Local heating cannot be performed rapidly because heating efficiency is poor and coil loss is large.
（２）急速加熱ができないので、熱伝導により被加熱部
３と反対側の部分も昇温してしまい、有効な局部加熱が
できない。その結果、前記温度差を利用したパイプの湾
曲加工の加工精度の低下をまねく。(2) Since rapid heating is not possible, the temperature of the portion opposite to the heated portion 3 also rises due to heat conduction, making it impossible to perform effective local heating. As a result, the processing accuracy of pipe bending using the temperature difference is reduced.
（３）誘導子２４を、パイプ２の径および被加熱部３の
長さに応じてそれぞれ別個に製造しなければならない。(3) The inductor 24 must be manufactured separately depending on the diameter of the pipe 2 and the length of the heated section 3.
そこで、本発明は、従来技術の問題点を解決するために
なされたもので、パイプの加熱効率の向上を図り、有効
な局部加熱と可能として温度差を利用する湾曲加工の精
度を向上させ、さらに、被加熱部の範囲の調節を容易に
することを目的とする。Therefore, the present invention was made to solve the problems of the prior art, and aims to improve the heating efficiency of the pipe, improve the accuracy of bending processing using effective local heating and possible temperature difference, Furthermore, it is an object of the present invention to facilitate adjustment of the range of the heated portion.
８１課題を解決するための手段
本発明は、パイプの被加熱部の両端に電気的に接触して
加熱用の交流電流を流す接触子と、前記被加熱部に沿っ
て近接して配設された前記接触子の給電リードとを備え
たことをその構成とする。81 Means for Solving the Problems The present invention provides a contactor that electrically contacts both ends of a heated portion of a pipe to flow an alternating current for heating, and a contact that is disposed in close proximity along the heated portion. and a power supply lead for the contactor.
１１作用
交流電流を給電リードに流し、接触子を介してパイプに
直接通電すると、給電リードは被加熱部に近接して沿わ
せであるので、電流の近接効果により、パイプを流れる
電流は給電リード近傍に集中してジュール熱が発生し、
局部加熱される。11 Effect When an alternating current is passed through the power supply lead and energized directly to the pipe via the contact, the current flowing through the pipe is caused by the proximity effect of the current because the power supply lead runs close to the heated part. Joule heat is generated concentrated in the vicinity,
Local heating occurs.
Ｇ、実施例 以下、本発明の第１実施例を図面に基づいて説明する。G. Example Hereinafter, a first embodiment of the present invention will be described based on the drawings.
第１図において、パイプの加熱装置ｌは金属製パイプ２
の被加熱部３の両端に電気的に接触する一対の接触子４
．５と、前記パイプ２に沿って近接して配置された前記
接触子４．５の給電リード６．７とを備えている。これ
らの給電リード６゜７は断面矩形の棒状に形成されてい
る。これらの給電リード６．７の近接する端部に設けた
接続端子８．９は高周波電源１０に接続されている。In Fig. 1, the pipe heating device l is a metal pipe 2.
A pair of contacts 4 electrically contacting both ends of the heated portion 3 of
．． 5, and a power supply lead 6.7 of the contactor 4.5 arranged closely along the pipe 2. These power supply leads 6.7 are formed into bar shapes with a rectangular cross section. Connection terminals 8.9 provided at adjacent ends of these power supply leads 6.7 are connected to a high frequency power source 10.
前記接触子４．５には給電リードガイド溝４ａ。The contactor 4.5 has a power supply lead guide groove 4a.
５ａが形成されている。この給電リードガイド溝４ａ、
５ａには前記給電リード６．７がスライド自在に嵌合し
て、接触子４．５をスライドすることにより、給電リー
ド６．７の任意の位置で電気的に接触可能となっている
。前記接触子４．５には、その上面から給電リードガイ
ド溝４ａ、５ａにまたがって固定ボルト挿入孔４ｂ、５
ｂが形成され、固定ボルト１１．１１が螺合している。5a is formed. This power supply lead guide groove 4a,
The power supply lead 6.7 is slidably fitted into the power supply lead 5a, and by sliding the contact 4.5, electrical contact can be made at any position on the power supply lead 6.7. The contactor 4.5 has fixing bolt insertion holes 4b, 5 extending from the upper surface thereof across the power supply lead guide grooves 4a, 5a.
b is formed, and the fixing bolt 11.11 is threaded into it.
この固定ボルト２．２を締め付けることにより接触子４
．５を給電リード６．７の任意の位置に固定可能となっ
ている。By tightening this fixing bolt 2.2, the contact 4
．． 5 can be fixed at any position on the power supply lead 6.7.
また前記接触子４．５には７字状の接触面４ｃ。The contactor 4.5 also has a 7-shaped contact surface 4c.
５ｃが形成され種々の径のパイプ２に接触できる。5c is formed so that it can contact pipes 2 of various diameters.
このパイプ２を介して前記接触子４．５と対向する位置
には挟持部材１２．１３が配置されている。A clamping member 12.13 is arranged at a position facing the contactor 4.5 via the pipe 2.
この挟持部材１２．１３にもパイプ２に接触する７字状
の接触面１２ａ、１３ａか形成されている。This clamping member 12.13 is also formed with 7-shaped contact surfaces 12a, 13a that contact the pipe 2.
この挟持部材１２．１３と接触子４．５とによりてパイ
プ２を挟持し、パイプ２と接触子４．５とが電気的に接
触するようになっている。The pipe 2 is held between the holding member 12.13 and the contact 4.5, so that the pipe 2 and the contact 4.5 are in electrical contact with each other.
前記挟持部材１２．１３の接触面１２ａ、１３ａとの反
対面にはエアシリンダ１４．１５のシリンダロッド１４
ａ、１５ａが固着され、挟持部材１２．１３をパイプ２
に押圧し、または後退させる。A cylinder rod 14 of an air cylinder 14.15 is disposed on the opposite side of the clamping member 12.13 from the contact surfaces 12a, 13a.
a, 15a are fixed, and the clamping member 12.13 is connected to the pipe 2.
to push or retreat.
次に、前記実施例の作用を第１図〜第３図に基づいて説
明する。Next, the operation of the above embodiment will be explained based on FIGS. 1 to 3.
まず、第１図に示すように、一対の接触子４゜５と挾持
部材１２．１３とをパイプ２の所定長さに設定した被加
熱部３の両端までスライドさせ、固定ボルトｔｔ、ｔ”
ｔにより給電リード６．７に固定する。そして、エアシ
リンダ１４．１５を作動させ挟持部材１２．１３と接触
子４．５とてパイプ２を挟持させる。スイッチをＯＮす
ると、第２図に示すように、交流電流が給電リード６．
７から一方の接触子４を介してパイプ２に直接通電され
、他方の接触子５を介して他方の給電リード７へ流れる
。給電リード６．７は被加熱部に近接して配設しである
ので、第２図、第３図に示すように電流の近接効果によ
り、パイプ２を流れる電流は給電リード６．７の近傍に
集中し、この電流が集中した部分にジュール熱が発生し
、局部加熱される。この近接効果は高周波電源において
、顕著となるので１〜１０ＫＨｚ程度の高周波を利用す
ることが望ましい。First, as shown in FIG. 1, slide the pair of contacts 4.5 and the clamping members 12.13 to both ends of the heated part 3 of the pipe 2, which is set to a predetermined length, and fix the fixing bolts tt, t''.
t to fix it to the power supply lead 6.7. Then, the air cylinders 14.15 are operated to sandwich the pipe 2 between the clamping members 12.13 and the contacts 4.5. When the switch is turned on, alternating current flows through the power supply lead 6. as shown in FIG.
Electric current is applied directly from 7 to the pipe 2 via one contact 4, and flows to the other power supply lead 7 via the other contact 5. Since the power supply lead 6.7 is arranged close to the heated part, the current flowing through the pipe 2 is caused to flow in the vicinity of the power supply lead 6.7 due to the current proximity effect as shown in FIGS. 2 and 3. Joule heat is generated in the area where this current is concentrated, causing local heating. Since this proximity effect becomes noticeable in a high frequency power source, it is desirable to use a high frequency of about 1 to 10 KHz.
この実施例によれば、高効率（８０％〜９０％）で局部
加熱を急速に行うことができる。According to this embodiment, local heating can be rapidly performed with high efficiency (80% to 90%).
従って、パイプの片側を局部加熱し、被加熱部を内側に
して、常温部を外側とする前記湾曲加工を高精度で行う
ことができるという効果がある。Therefore, there is an effect that one side of the pipe is locally heated, and the above-mentioned bending process can be performed with high precision, with the heated part on the inside and the normal temperature part on the outside.
また、接触子４．５を給電リード６．７にガイドさせて
移動することにより被加熱部３の長さを任意に変えるこ
とができる。Furthermore, the length of the heated portion 3 can be changed arbitrarily by moving the contactor 4.5 while being guided by the power supply lead 6.7.
さらに、前記接触子４．５の接触面４ｃ、５ｃを７字状
に形成したので、種々の径のペイプ２に用いることがで
きるという効果がある。Furthermore, since the contact surfaces 4c and 5c of the contactor 4.5 are formed in a 7-shape, there is an effect that the contactor 4.5 can be used for tapes 2 of various diameters.
次に本発明の第２実施例を第４図〜第８図に基づいて説
明する。Next, a second embodiment of the present invention will be described based on FIGS. 4 to 8.
第４図および第５図においてパイプの加熱装置１は、前
記実施例と異なり、パイプ２の被加熱部３の両端に上下
からこれを挟持する二組の接触子１６・１７．４・５と
、これらの接触子１６・１７．４−５の一側方にそれぞ
れ配置した上下２組の給電リード１８・１９．６・７と
を備えている。In FIGS. 4 and 5, the pipe heating device 1 differs from the previous embodiment in that there are two sets of contacts 16, 17, 4, and 5 at both ends of the heated portion 3 of the pipe 2, which sandwich it from above and below. , two pairs of upper and lower power supply leads 18, 19.6, and 7 are provided on one side of these contacts 16, 17.4-5, respectively.
これらの給電リード１８・１９．６・７は前記実施例と
同様に接触子１６・１７．４・５に設けた給電リードガ
イド溝１６ａ１７ａ、４ａ・５ａにスライド自在に嵌合
し、上方および下方の同軸的に設けられた給電リード１
８・１９，６・７の接続端子２０・２１．８・９はそれ
ぞれ交流電源ｌＯに接続されている。一方、上、下２組
の接触子１６・１７．４・５の側部には固定ボルト１１
・１１．１１−１１が設けられ、それぞれ接触子１６・
１７．４・５を給電リード１８・１９．６・７に固定で
きるようになっている。また、上方の接触子１６．１７
上面にはエアシリンダ１４．１５のシリンダロッド１４
ａ、１５ａの先端部が固着され、上下移動可能となって
いる。These power supply leads 18, 19.6, 7 are slidably fitted into the power supply lead guide grooves 16a, 17a, 4a, 5a provided in the contacts 16, 17, 4, 5 in the same way as in the previous embodiment. Power supply lead 1 coaxially provided with
Connection terminals 20, 21, 8, and 9 of 8, 19, 6, and 7 are connected to an AC power source IO, respectively. On the other hand, fixing bolts 11 are attached to the sides of the upper and lower two sets of contacts 16, 17, 4, and 5.
・11.11-11 are provided, and each contact 16・
17.4 and 5 can be fixed to the power supply leads 18, 19.6 and 7. Also, the upper contact 16.17
On the top surface is the cylinder rod 14 of the air cylinder 14.15.
The tips of a and 15a are fixed and can be moved up and down.
なお、他の構成部分は前記実施例と同様となっているの
で同一符号を付してその説明を省略する。Note that other constituent parts are the same as those in the previous embodiment, so the same reference numerals are given and explanations thereof will be omitted.
次にこの実施例の作用について説明する。Next, the operation of this embodiment will be explained.
この実施例においても前記実施例と同様に操作すればよ
く、第６図に示すようにスイッチをＯＮすると交流電源
ｌＯから、一方の上下の給電り−ド１８，６、接触子１
６．４を介してパイプ２に直接通電され、他方の上、下
の接触子１７．５からそれぞれ給電リード１９．７に電
流は流れる。This embodiment can be operated in the same manner as in the previous embodiment, and when the switch is turned on as shown in FIG.
The pipe 2 is energized directly via the pipe 6.4, and the current flows from the other upper and lower contacts 17.5 to the power supply leads 19.7, respectively.
この実施例によれば、前記実施例と同様の効果を有する
他、第６図、第７図に示すようにパイプ２を流れる電流
の周方向の幅を広くできるので被加熱部３の周方向の幅
を広くすることができる。According to this embodiment, in addition to having the same effect as the previous embodiment, the width of the current flowing through the pipe 2 in the circumferential direction can be widened as shown in FIGS. can be made wider.
また、前記上方の接触子１６．１７をパイプ２の周方向
に回動して、
第８図に示すように、上下の給電リード１８・１９．６
・７の幅を変化させることにより、パイプ２の周方向の
被加熱部３の幅を調節できるという効果もある。Further, the upper contactor 16.17 is rotated in the circumferential direction of the pipe 2, and the upper and lower power supply leads 18, 19.6 are rotated as shown in FIG.
- By changing the width of the pipe 7, there is also the effect that the width of the heated portion 3 in the circumferential direction of the pipe 2 can be adjusted.
Ｈ０発明の効果
以上の説明から明らかなように本発明によれば、パイプ
の被加熱部の両端に接続して交流電流を流す接触子と、
前記被加熱部に沿って近接して配設された前記接触子の
給電リードとを備えているので、以下の効果を有する。H0 Effects of the invention As is clear from the above description, according to the invention, a contactor that is connected to both ends of the heated portion of the pipe and causes an alternating current to flow;
Since the power supply lead of the contact is disposed close to the heated portion, the following effects can be obtained.
（１）加熱効率が良く、局部加熱を急速に行える。(1) High heating efficiency and rapid local heating.
（２）パイプの片側だけを局部加熱して、この被加熱部
と内側に湾曲させる加工精度の向上を図れる。(2) It is possible to improve the processing accuracy by locally heating only one side of the pipe and curving it inward with the heated part.
（３）被加熱部の範囲を容易に調節できる。(3) The range of the heated portion can be easily adjusted.
第１図〜第３図は本発明の第１実施例を示すもので、第
１図はパイプの加熱装置の斜視図、第２図はパイプの加
熱装置の作用説明図、第３図は断面方向の作用説明図、
第４図〜第８図は本発明の第２実施例を示すもので、第
４図はパイプの加熱装置の正面図、第５図は第４図の■
−■線における断面図、第６図はパイプの加熱装置の作
用説明図、第７図は断面方向の作用説明図、第８図は第
７図の変形例を示す断面方向の作用説明図、第９図はパ
イプ湾曲加工の説明図、第１θ図は第９図のＸ−Ｘ線に
おける断面図、第１１図および第１２図は従来技術を示
すもので第２図は斜視図、第１２図は第１１図の℃−■
線における断面図である。
ｌ・・・パイプの加熱装置、２・・・パイプ、３・・・
被加熱部、４・５．１６・１７・・・接触子、６・７，
１８・１９・・・給電リード、１０・・・交流電源。
ブ乍ｎ弓記朗［イア （第２火方散イ列 ラ第６図
第１１図
第７図
第８図
手続補正書０．え。
！、小事件表示
昭和６３年特許願第４５４０３号
２、発明の名称
パイプの加熱装置
３、補正をする者
（６１０）株式会社 明 電 舎
４、代理人〒１０４
東京都中央区明石町１番２９号 液済会ビル６、補正の
内容
（１）明細書の第５頁第１３行目の「あるので」を、「
あり、給電リードを流れる電流とパイプの被加熱部を流
れる電流の方向は逆方向なので」と訂正する。
（２）同、第９頁第６行目の「あるので」を、「あり、
給電リード６．７を流れる電流と、パイプ２の被加熱部
３を流れる電流の方向は第３図に示すように互いに逆方
向なので」と訂正する。
（３）図面の第１図、第４図、第５図、第７図、第８図
および第１１図を別紙の通り訂正する。
（第９図、第１０図および第１２図は内容に変更なし）
以上
第７図
第８図1 to 3 show a first embodiment of the present invention, in which FIG. 1 is a perspective view of a pipe heating device, FIG. 2 is an explanatory diagram of the operation of the pipe heating device, and FIG. 3 is a cross-sectional view. Diagram explaining the effect of direction,
4 to 8 show a second embodiment of the present invention. FIG. 4 is a front view of a pipe heating device, and FIG. 5 is a front view of a pipe heating device.
6 is an explanatory diagram of the action of the pipe heating device; FIG. 7 is an explanatory diagram of the action in the cross-sectional direction; FIG. 8 is an explanatory diagram of the action in the cross-sectional direction showing a modification of FIG. 7; Fig. 9 is an explanatory diagram of pipe bending processing, Fig. 1θ is a sectional view taken along the line X-X in Fig. 9, Figs. The figure is ℃-■ in Figure 11.
FIG. l...pipe heating device, 2...pipe, 3...
Heated part, 4/5.16/17...Contactor, 6/7,
18/19...Power supply lead, 10...AC power supply. Figure 6 Figure 11 Figure 7 Figure 8 Procedure amendment 0. E!, minor incident indication 1988 Patent Application No. 45403 2 , Title of the invention: Pipe heating device 3, Person making the amendment (610) Meidensha Co., Ltd. 4, Agent address: 6, Suiseikai Building, 1-29 Akashi-cho, Chuo-ku, Tokyo 104, Contents of the amendment (1) “Because” on page 5, line 13 of the specification is changed to “
Yes, because the current flowing through the power supply lead and the current flowing through the heated part of the pipe are in opposite directions.'' (2) Same, page 9, line 6, “there is” is changed to “there is,”
The current flowing through the power supply lead 6.7 and the current flowing through the heated portion 3 of the pipe 2 are in opposite directions as shown in FIG. 3.'' (3) Figures 1, 4, 5, 7, 8, and 11 of the drawings will be corrected as shown in the attached sheet. (The contents of Figures 9, 10, and 12 are unchanged.) Above Figure 7 Figure 8
Claims (1)
用の交流電流を流す接触子と、前記被加熱部に沿って近
接して配設された前記接触子の給電リードとを備えたこ
とを特徴とするパイプの加熱装置。(1) A contact that electrically contacts both ends of the heated portion of the pipe to flow an alternating current for heating, and a power supply lead of the contact that is disposed in close proximity along the heated portion. A pipe heating device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63045403A JP2636301B2 (en) | 1988-02-27 | 1988-02-27 | Pipe heating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63045403A JP2636301B2 (en) | 1988-02-27 | 1988-02-27 | Pipe heating equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01220384A true JPH01220384A (en) | 1989-09-04 |
| JP2636301B2 JP2636301B2 (en) | 1997-07-30 |
Family
ID=12718287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63045403A Expired - Lifetime JP2636301B2 (en) | 1988-02-27 | 1988-02-27 | Pipe heating equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2636301B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200022222A1 (en) * | 2016-10-07 | 2020-01-16 | De-Ice Technologies, Inc. | Heating a bulk medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5055511A (en) * | 1973-09-17 | 1975-05-15 | ||
| JPS5739038A (en) * | 1980-08-22 | 1982-03-04 | Masamitsu Ishihara | Press bending machine |
-
1988
- 1988-02-27 JP JP63045403A patent/JP2636301B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5055511A (en) * | 1973-09-17 | 1975-05-15 | ||
| JPS5739038A (en) * | 1980-08-22 | 1982-03-04 | Masamitsu Ishihara | Press bending machine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200022222A1 (en) * | 2016-10-07 | 2020-01-16 | De-Ice Technologies, Inc. | Heating a bulk medium |
| US10708979B2 (en) * | 2016-10-07 | 2020-07-07 | De-Ice Technologies | Heating a bulk medium |
| US11910493B2 (en) | 2016-10-07 | 2024-02-20 | De-Ice Technologies, Inc. | Heating a bulk medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2636301B2 (en) | 1997-07-30 |
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