JPS6374929A - Form adjusting method for glass tube - Google Patents
Form adjusting method for glass tubeInfo
- Publication number
- JPS6374929A JPS6374929A JP21957086A JP21957086A JPS6374929A JP S6374929 A JPS6374929 A JP S6374929A JP 21957086 A JP21957086 A JP 21957086A JP 21957086 A JP21957086 A JP 21957086A JP S6374929 A JPS6374929 A JP S6374929A
- Authority
- JP
- Japan
- Prior art keywords
- glass tube
- diameter
- tube
- light source
- temperature state
- 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
- 239000011521 glass Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000007493 shaping process Methods 0.000 claims description 7
- 210000004276 hyalin Anatomy 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は硝子管の整形方法に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a method for shaping a hyaline tube.
従来、硝子管の径の測定は、第４図に示すように、硝子
管１の温度が低い状態でノギス２等を用いて測定してい
た。Conventionally, the diameter of a glass tube has been measured using a caliper 2 or the like when the temperature of the glass tube 1 is low, as shown in FIG.
上記従来技術では、硝子管１がノギス２に接触しても変
形しない程度に冷却されていることが必要である。しか
し、周知のように一旦冷却された硝子管ｌの径を均一に
修正するには、研摩又はフッ化水素酸による溶解等しか
方法がなく、加工費が高価になる。In the above-mentioned prior art, it is necessary that the glass tube 1 is cooled to such an extent that it does not deform even if it comes into contact with the caliper 2. However, as is well known, in order to uniformly correct the diameter of the glass tube l once it has been cooled, there are only methods such as polishing or dissolution with hydrofluoric acid, which results in high processing costs.
そこで、硝子管の製作は経験をベースにした感や見込み
による寸法制御となるが、現実は仲々コントロールが難
しく、結局は完成した硝子管を実測して選別している。Therefore, when manufacturing glass tubes, the dimensions are controlled based on experience and expectations, but in reality, control is difficult, and in the end, finished glass tubes are actually measured and selected.
本発明の目的は、高精度で安価な硝子管を得ることがで
きる硝子管の整形方法を提供することにある。An object of the present invention is to provide a method for shaping a vitreous tube that can obtain a vitreous tube with high precision and at low cost.
上記目的は、高温状態の硝子管の径を光学的に測定し、
その結果を整形用に硝子管内に吹き込む空気圧及び引き
延し量の制御にフィードバックすることにより解決され
る。The above purpose is to optically measure the diameter of a glass tube in a high temperature state.
This problem can be solved by feeding back the results to control the air pressure blown into the glass tube for shaping and the amount of stretching.
光学的に測定するので、整形時における高温状態にある
硝子管の径を測定できる。またその測定結果をフィード
バックして硝子管内に吹き込む空気圧及び引き延し量を
制御するので、整形時に硝子管の径を所定値に制御する
ことができる。Since it is measured optically, it is possible to measure the diameter of a glass tube that is in a high temperature state during shaping. Furthermore, since the measurement results are fed back to control the air pressure blown into the glass tube and the amount of stretching, the diameter of the glass tube can be controlled to a predetermined value during shaping.
以下、本発明の一実施例を第１図乃至ｔａａ図により説
明する。第１図に示すように、高温状態にある硝子管３
の一方側に光源４を配置し、他方側に光源４に対向する
ように光電式センサ５を配［してなる。センサ５の中に
は、１次元又は２次元に配列された受光素子群がある。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. As shown in Fig. 1, the glass tube 3 is in a high temperature state.
A light source 4 is disposed on one side of the sensor, and a photoelectric sensor 5 is disposed on the other side so as to face the light source 4. The sensor 5 includes a group of light receiving elements arranged one-dimensionally or two-dimensionally.
第２図に示すように、光源４から投射された光の内、硝
子管３のイ方向へ向う光で管壁へ直角に入射しない光は
光路が曲り、かつ入射光と管壁のなす角度が臨界角に近
付くと全反射を生ずるため、第１図のセンサ５の受光素
子群の出力信号値は、第２図に示す出力分布６のように
シャープな形となる。第２図に示すＡ、Ｈの長さを読み
取れば、Ａにより硝子管３の外径、Ｂにより内径、（Ａ
−Ｂ）／２により肉厚が判る。As shown in Fig. 2, among the light projected from the light source 4, the light that travels in the A direction of the glass tube 3 and does not enter the tube wall at a right angle has a curved optical path and an angle formed by the incident light and the tube wall. When the angle approaches the critical angle, total reflection occurs, so the output signal value of the light receiving element group of the sensor 5 shown in FIG. 1 takes on a sharp shape as shown in the output distribution 6 shown in FIG. 2. If you read the lengths A and H shown in Fig. 2, A is the outer diameter of the glass tube 3, B is the inner diameter, (A
-B)/2 determines the wall thickness.
この時、読み取り誤差を発生する要因は３つある。第１
は、硝子管が高温の時は熱膨張により冷えた時より大き
な値となることである。これは測定時の温度をいつも一
定とし、予め冷えた時の硝子管の径を測定しておき、プ
ログラムで実測値を補正すればよい。第２は、高温の硝
子管ではその周囲の空気が昇温し、屈折率が変って硝子
管表面を通過した光の光路が変る場合である。これも測
定プログラムに予め補正をすれば問題ない。ｔａ３は、
高温の硝子管は光を放射するため、もし受光センサ５が
この放射光を検出すれば誤差が生じる。At this time, there are three factors that cause reading errors. 1st
is a larger value when the glass tube is hot than when it is cooled due to thermal expansion. This can be done by keeping the temperature constant at the time of measurement, measuring the diameter of the glass tube in advance when it is cold, and correcting the actual measurement value using the program. The second case is when the temperature of the air surrounding a high-temperature glass tube increases, the refractive index changes, and the optical path of light passing through the glass tube surface changes. This is also not a problem if the measurement program is corrected in advance. ta3 is
Since the high temperature glass tube emits light, if the light receiving sensor 5 detects this emitted light, an error will occur.
従って、光源４のスペクトル分布は単色光が望ましく、
受光側も選択的に光源からの波長成分のみ高い感度で検
知する工夫が必要である。Therefore, it is desirable that the spectral distribution of the light source 4 be monochromatic;
On the light receiving side, it is also necessary to devise a method to selectively detect only the wavelength components from the light source with high sensitivity.
前記のように硝子管３の管径を測定し、また補正した結
果は、第３図に示すように判定し、規格外の場合はフィ
ードバックし、硝子管３内へ吹き込む空気圧や、管軸方
向の引き延し等のプロセス条件の設定値を変更し、硝子
管３の管径を制御する。The diameter of the glass tube 3 is measured as described above, and the corrected results are judged as shown in FIG. The diameter of the glass tube 3 is controlled by changing the set values of process conditions such as elongation.
なお、本発明は硝子管の製作以外にも、例えば同一径の
硝子管を高精度に溶着する場合にも適用できる。Note that the present invention can be applied not only to manufacturing glass tubes but also to, for example, welding glass tubes of the same diameter with high precision.
本発明によれば、高温状態で測定した結果をフィードバ
ックしてプロセス条件の設定値を変更して整形するので
、高精度で安価な硝子管が得られる。According to the present invention, since the results of measurement in a high temperature state are fed back and the set values of process conditions are changed and shaped, a highly accurate and inexpensive glass tube can be obtained.
第１図は本発明の一実施例を示す硝子管測定方法の説明
図、第２図は第１図憂こぶけるセンサの出力信号の分布
と硝子管との対応説明図、第３図は本発明のシステムを
示す説明図、第４図は従来の測定方法の説明図である。
３・・・硝子管、 ４・・・光源、５・・
・光電式センサ、 ６・・・出力分布。
第１因
第２ｖ！Ｊ
第３図
完成Fig. 1 is an explanatory diagram of a vitreous tube measuring method showing an embodiment of the present invention, Fig. 2 is an explanatory diagram of the correspondence between the distribution of the output signal of the sensor shown in Fig. 1 and the vitreous tube, and Fig. 3 is a diagram of the present invention. An explanatory diagram showing the system of the invention, and FIG. 4 is an explanatory diagram of a conventional measuring method. 3... Glass tube, 4... Light source, 5...
・Photoelectric sensor, 6...Output distribution. 1st cause 2nd v! J Figure 3 completed
Claims (1)
を整形用に硝子管内に吹き込む空気圧及び引き延し量の
制御にフィードバックして硝子管の径を所定値に制御す
ることを特徴とする硝子管の整形方法。1. The diameter of the glass tube in a high temperature state is optically measured, and the results are fed back to control the air pressure blown into the glass tube for shaping and the amount of stretching, thereby controlling the diameter of the glass tube to a predetermined value. Characteristic hyaline tube shaping method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21957086A JPS6374929A (en) | 1986-09-19 | 1986-09-19 | Form adjusting method for glass tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21957086A JPS6374929A (en) | 1986-09-19 | 1986-09-19 | Form adjusting method for glass tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6374929A true JPS6374929A (en) | 1988-04-05 |
Family
ID=16737580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21957086A Pending JPS6374929A (en) | 1986-09-19 | 1986-09-19 | Form adjusting method for glass tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6374929A (en) |
-
1986
- 1986-09-19 JP JP21957086A patent/JPS6374929A/en active Pending
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