JPH0753229A - Method and apparatus for controlling temperature of curved furnace - Google Patents
Method and apparatus for controlling temperature of curved furnaceInfo
- Publication number
- JPH0753229A JPH0753229A JP5197280A JP19728093A JPH0753229A JP H0753229 A JPH0753229 A JP H0753229A JP 5197280 A JP5197280 A JP 5197280A JP 19728093 A JP19728093 A JP 19728093A JP H0753229 A JPH0753229 A JP H0753229A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- heating zones
- absence
- temperature
- shaped material
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B29/00—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins
- C03B29/04—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins in a continuous way
- C03B29/06—Reheating glass products for softening or fusing their surfaces; Fire-polishing; Fusing of margins in a continuous way with horizontal displacement of the products
- C03B29/08—Glass sheets
-
- 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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は自動車のフロントガラス
等の最大曲深さを調整する曲炉の温度制御方法及び装置
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bending furnace temperature control method and apparatus for adjusting the maximum bending depth of a windshield of an automobile.
【０００２】[0002]
【従来の技術】湾曲状に曲げ成形されている自動車のフ
ロントガラス等の曲げ成形には曲炉が使用される。すな
わち、曲炉の前工程で切断された平板状ガラスを台車の
枠体に載置して、台車の枠体で平板状ガラスの周縁を支
持する。この状態で平板状ガラスを曲炉内に搬入して平
板状ガラスを加熱すると、台車の枠体で支持されていな
い平板状ガラスの周縁以外の部分が自重で垂れ下がる。
これにより、平板状ガラスがフロントガラスに曲げ成形
される。そして、曲げ成形されたフロントガラスが良品
であるか、不良品であるかはフロントガラスの最大曲深
さ（以下、Ｗ値と称す）が許容範囲内に入っているか否
かで判断される。2. Description of the Related Art A bending furnace is used for bending an automobile windshield or the like which is bent into a curved shape. That is, the flat glass cut in the previous step of the bending furnace is placed on the frame of the truck, and the frame of the truck supports the peripheral edge of the flat glass. When the flat glass is loaded into the bending furnace and heated in this state, the flat glass, which is not supported by the frame of the carriage, hangs down by its own weight.
As a result, the flat glass is bent and formed into the windshield. Whether the bent windshield is a good product or a defective product is determined by whether or not the maximum bending depth (hereinafter referred to as W value) of the windshield is within an allowable range.
【０００３】[0003]
【発明が解決しようとする課題】このフロントガラスの
Ｗ値に影響を与える要因として特に空焼が知られてい
る。空焼とは板ガラスが載置されない台車、すなわち空
の台車が曲炉内に搬送された状態をいう。通常加熱ゾー
ンに設けられたヒータの熱エネルギは、加熱ゾーン内に
搬送された板ガラス等で吸収されて雰囲気温度の上昇が
抑制されている。しかしながら、空焼の場合加熱ゾーン
内に板ガラスが搬送されないのでヒータの熱エネルギを
板ガラスで吸収することができず、加熱ゾーン内の雰囲
気温度が上昇する。従って、空焼後の加熱ゾーンに板ガ
ラスが搬送されると、搬送された板ガラスのＷ値が大き
くなりすぎて目標値の許容範囲内に入らないという問題
がある。Air burning is particularly known as a factor affecting the W value of the windshield. Air-baking refers to a state in which a trolley on which no plate glass is placed, that is, a vacant trolley is conveyed into the bending furnace. The heat energy of the heater provided in the normal heating zone is absorbed by the plate glass or the like conveyed in the heating zone, and the rise in ambient temperature is suppressed. However, in the case of air burning, since the plate glass is not conveyed into the heating zone, the heat energy of the heater cannot be absorbed by the plate glass, and the ambient temperature in the heating zone rises. Therefore, when the sheet glass is transported to the heating zone after the air-baking, there is a problem that the W value of the transported sheet glass becomes too large and does not fall within the allowable range of the target value.
【０００４】本発明はこのような事情に鑑みてなされた
もので、空焼後の板ガラスのＷ値を目標値の許容範囲内
に入るように炉内温度を自動的に制御して生産性の向上
を図ることができる曲炉の温度制御方法及び装置を提供
することを目的とする。The present invention has been made in view of such circumstances, and the productivity is improved by automatically controlling the temperature in the furnace so that the W value of the plate glass after air-burning falls within the allowable range of the target value. An object of the present invention is to provide a bending furnace temperature control method and apparatus that can be improved.
【０００５】[0005]
【課題を解決するための手段】本発明は、複数の加熱ゾ
ーンが直列状態に設けられると共に前記加熱ゾーン毎に
ヒータユニットを設け、該夫々のヒータユニットで前記
複数の加熱ゾーン内の夫々を加熱すると共に台車を前記
複数の加熱ゾーンに沿って搬送して、台車に載置された
板状材を曲げ成形する曲炉の温度制御方法において、
（１）前記複数の加熱ゾーン毎に板状材の有無が示され
た最初のテーブルを作成する工程と、（２）前記複数の
加熱ゾーン内に新たに搬入される台車に板状材が載置さ
れているか否かを入口側で検知する工程と、（３）前記
検知する工程で得られた板状材の有無の検知データに基
づいて前記最初のテーブルを変更した次回のテーブルを
作成する工程と、（４）前記最初のテーブルと次回のテ
ーブルとを比較して、前記板状材の有無が変化した加熱
ゾーン内の温度条件を一定に維持するように前記ヒータ
ユニットの発生熱量を制御する工程と、から成り、前記
次回のテーブルを最初のテーブルとして前記（１）〜
（４）の工程を繰返し行うことを特徴とする曲炉の温度
制御方法及び、それを実施するための装置である。According to the present invention, a plurality of heating zones are provided in series and a heater unit is provided for each heating zone, and each heater unit heats each of the plurality of heating zones. In the temperature control method of the bending furnace, which conveys the truck along with the plurality of heating zones, and bend-forms the plate-shaped material placed on the truck,
(1) creating a first table indicating the presence or absence of a plate-shaped material for each of the plurality of heating zones; and (2) mounting the plate-shaped material on a carriage newly carried into the plurality of heating zones. A step of detecting whether or not it is placed on the inlet side, and (3) creating a next table by changing the first table based on the detection data of the presence or absence of the plate-like material obtained in the detecting step. And (4) comparing the first table and the next table with each other, and controlling the amount of heat generated by the heater unit so as to maintain a constant temperature condition in the heating zone where the presence or absence of the plate-shaped material changes. And the process of (1) to the next table as the first table.
A method for controlling a temperature of a bending furnace, which is characterized in that the step (4) is repeated, and an apparatus for carrying out the method.
【０００６】[0006]
【作用】本発明によれば、温度制御部はヒータユニット
の発生熱量を制御して、複数の加熱ゾーン内の温度条件
を個別に制御し、検出手段は複数の加熱ゾーン内に新た
に搬入される台車に板状材が載置されているか否かを検
知する。また、コンピュータは検出手段から入力された
板状材の有無の検知データに基づいて、予め設定された
加熱ゾーン毎に板状材の有無が示された最初のテーブル
を変更し、この変更したテーブルを次回のテーブルとし
て設定する。さらに、コンピュータは最初のテーブルと
次回のテーブルとを比較して、板状材の有無が変化した
加熱ゾーン内の温度条件を一定に維持するようにヒータ
ユニットの発生熱量を制御する信号を温度制御部に出力
する。According to the present invention, the temperature controller controls the amount of heat generated by the heater unit to individually control the temperature conditions in the plurality of heating zones, and the detecting means is newly carried in the plurality of heating zones. It detects whether or not a plate-shaped material is placed on the carriage. Further, the computer changes the first table indicating the presence or absence of the plate-shaped material for each preset heating zone based on the detection data of the presence or absence of the plate-shaped material input from the detection means, and the changed table Is set as the next table. Further, the computer compares the first table with the next table and controls the temperature of a signal for controlling the amount of heat generated by the heater unit so as to maintain a constant temperature condition in the heating zone where the presence or absence of the plate-shaped material changes. Output to the department.
【０００７】このように、板状材の有無が変化した加熱
ゾーン内の温度条件を一定に維持することができるの
で、加熱ゾーン内で板状材の有無が変化した場合でも板
状材の最大曲深さを目標値の許容範囲内に入れることが
できる。As described above, since the temperature condition in the heating zone where the presence or absence of the plate-like material is changed can be kept constant, even if the presence or absence of the plate-like material is changed in the heating zone, the maximum of the plate-like material is The bending depth can be set within the allowable range of the target value.
【０００８】[0008]
【実施例】以下添付図面に従って本発明に係る曲炉の温
度制御方法及び装置について詳説する。図１に示す曲炉
１０は炉内に加熱ゾーンＺ1 、Ｚ2 …Ｚ15（図３参照）
が搬送方向と平行に設けられていて、加熱ゾーンＺ1 、
Ｚ2 …Ｚ15には夫々加熱用のヒータユニットＨ1 、Ｈ2
…Ｈ15が取り付けられている。そして、例えばヒータユ
ニットＨ1 は図２に示すようにヒータ部Ｈ1-1 、
Ｈ1-2 、Ｈ1-3 、Ｈ1-4 、Ｈ1-5 から成り、ヒータ部Ｈ
1-1 、Ｈ1-2 、Ｈ1-4 、Ｈ1-5 は加熱ゾーンＺ1 の４角
に配設されていて、ヒータ部Ｈ1-3 は加熱ゾーンの中央
に配設されている。The temperature control method and apparatus for a bending furnace according to the present invention will be described in detail below with reference to the accompanying drawings. The bending furnace 10 shown in FIG. 1 has heating zones Z 1 , Z 2 ... Z 15 in the furnace (see FIG. 3).
Are provided in parallel with the conveying direction, and the heating zone Z 1 ,
Z 2 ... Z 15 are heater units H 1 and H 2 for heating, respectively.
... H 15 is attached. Then, for example, a heater unit H 1 is the heater unit H 1-1 as shown in FIG. 2,
H 1-2 , H 1-3 , H 1-4 , H 1-5
1-1 , H 1-2 , H 1-4 , H 1-5 are arranged at the four corners of the heating zone Z 1 , and the heater part H 1-3 is arranged in the center of the heating zone. .
【０００９】そして、ヒータ部Ｈ1-1 、Ｈ1-2 、
Ｈ1-3 、Ｈ1-4 、Ｈ1-5 の発熱状態を制御して加熱ゾー
ンＺ1 内の雰囲気温度を調整する。このように、複数の
ヒータ部Ｈ 1-1 、Ｈ1-2 、Ｈ1-3 、Ｈ1-4 、Ｈ1-5 で加
熱ゾーンＺ1 の雰囲気温度を調整するので、製品品種毎
に対応した雰囲気温度に調整することができる。また、
曲炉１０には搬送コンベア（図示せず）が設けられてい
て、搬送コンベアが作動すると台車１２及び板ガラス１
４が発進して搬入口から炉内に搬入して、搬出口から搬
出する。The heater portion H1-1, H1-2,
H1-3, H1-4, H1-5Controls the heat generation state of
Z1Adjust the ambient temperature inside. Thus, multiple
Heater part H 1-1, H1-2, H1-3, H1-4, H1-5Added
Heat zone Z1Since the ambient temperature of is adjusted,
It is possible to adjust the ambient temperature corresponding to. Also,
The bending furnace 10 is provided with a conveyor (not shown).
When the transport conveyor operates, the cart 12 and the glass sheet 1
4 started, carried in from the carry-in port into the furnace, and carried in from the carry-out port.
Put out.
【００１０】図１には本発明に係る曲炉の温度制御装置
３０の概略図が示されている。曲炉の温度制御装置３０
は温度制御部３２、コンピュータ３４及び検出センサ３
６等を備えていて、温度制御部３２はヒータユニットＨ
1 、Ｈ2 …Ｈ15を後述するコンピュータ３４からの信号
に基づいて制御する。検出センサ３６は曲炉１０の搬入
口の近傍に設けられていて、台車発進毎に搬入口に搬送
されてきた台車１２に板ガラス１４が載置されているか
否かを検知する。そして、検知したデータを後述するコ
ンピュータ３４に出力する。FIG. 1 is a schematic view of a bending furnace temperature control device 30 according to the present invention. Bending furnace temperature control device 30
Is the temperature control unit 32, the computer 34 and the detection sensor 3
6 and the like, and the temperature control unit 32 includes a heater unit H.
1 , H 2 ... H 15 are controlled based on a signal from a computer 34 described later. The detection sensor 36 is provided in the vicinity of the carry-in port of the bending furnace 10 and detects whether or not the plate glass 14 is placed on the carriage 12 that has been conveyed to the carry-in entrance every time the carriage is started. Then, the detected data is output to the computer 34 described later.
【００１１】コンピュータ３４には予め夫々の加熱ゾー
ン毎に板ガラス１４の有無の状態が表示されたテーブル
が設定されている。そして、コンピュータ３４は検出セ
ンサ３６から入力されたデータに基づいて予め設定され
ているテーブルをシフトして、シフト前のテーブルとシ
フト後のテーブルとを比較して板ガラスの有無の状態が
変化した加熱ゾーンの温度条件を変更する。この温度条
件は夫々の加熱ゾーン毎に板有り温度条件と空焼き温度
条件が設定されていて、シフト前後で加熱ゾーンの板ガ
ラスの有無が変化した場合夫々の温度条件を切り換え
る。A table in which the presence or absence of the plate glass 14 is displayed is preset in the computer 34 for each heating zone. Then, the computer 34 shifts the preset table based on the data input from the detection sensor 36, compares the table before the shift and the table after the shift, and changes the state of the presence or absence of the sheet glass. Change the temperature condition of the zone. As for this temperature condition, a temperature condition with a plate and a temperature condition with no baking are set for each heating zone, and when the presence or absence of plate glass in the heating zone changes before and after the shift, the temperature conditions are switched.
【００１２】以下温度条件の切換えについて図３に基づ
いて説明する。図３において（Ａ）はシフト前のテーブ
ルを示し、（Ｂ）はシフト後のテーブルを示している。
また、●は板ガラス１４が加熱ゾーン内に有る場合を示
し、○は板ガラス１４が加熱ゾーン内に無い場合（空焼
の場合）を示している。（Ａ）のシフト前のテーブルと
（Ｂ）のシフト後のテーブルを比較すると、加熱ゾーン
Ｚ1 が板有り条件から空焼き条件に変更され、加熱ゾー
ンＺ7 が空焼き条件から板有り条件に変更されている。
この場合コンピュータ３４は、加熱ゾーンＺ1 を板有り
温度条件から空焼き温度条件に切り換えて、加熱ゾーン
Ｚ7 を空焼き温度条件から板有り温度条件に切り換える
信号を温度制御部３２に出力する。Switching of temperature conditions will be described below with reference to FIG. In FIG. 3, (A) shows the table before the shift, and (B) shows the table after the shift.
Further, ● indicates the case where the plate glass 14 is inside the heating zone, and ○ indicates the case where the plate glass 14 is not inside the heating zone (in the case of air baking). Comparing the table before the shift in (A) and the table after the shift in (B), the heating zone Z 1 is changed from the condition with the plate to the bake condition, and the heating zone Z 7 is changed from the condition with the plate to the condition with the plate. has been changed.
In this case, the computer 34 outputs a signal to the temperature control unit 32 to switch the heating zone Z 1 from the temperature condition with the plate to the bake temperature condition and to switch the heating zone Z 7 from the temperature condition with the plate to the temperature condition with the plate.
【００１３】すなわち、ヒータユニットＨ1 、Ｈ2 …Ｈ
15は夫々板有り温度条件と、空焼き温度条件に切り換え
可能に構成されている。そして、シフト前後のテーブル
を比較した際に、板有り条件から空焼き条件に変更され
た加熱ゾーンのヒータユニットの温度条件を板有り温度
条件から空焼き温度条件に切り換える。また、空焼き条
件から板有り条件に変更された加熱ゾーンのヒータユニ
ットの温度条件を空焼き温度条件から板有り温度条件に
切り換える。これにより、炉内雰囲気温度を一定に保つ
ことができる。尚、炉内雰囲気温度を一定に保つために
は板有り温度条件と空焼き温度条件との差をどのくらい
つけるかが重要であるが、これは曲炉の特性や製品の種
類によって異なる。そして、コンピュータ３４は夫々の
温度条件を製品品種毎に設定することができる。That is, the heater units H 1 , H 2 ... H
Each of 15 is configured so that it can be switched between a temperature condition with a plate and a temperature condition with an air condition. Then, when the tables before and after the shift are compared with each other, the temperature condition of the heater unit in the heating zone in which the plate existence condition is changed to the plate baking condition is switched from the plate existence temperature condition to the air baking temperature condition. Further, the temperature condition of the heater unit in the heating zone, which is changed from the air-baked condition to the plate-containing condition, is switched from the air-baking temperature condition to the plate-containing temperature condition. Thereby, the ambient temperature in the furnace can be kept constant. In order to keep the atmosphere temperature in the furnace constant, it is important to make a difference between the temperature condition with the plate and the temperature condition for the calcination, but this depends on the characteristics of the bending furnace and the type of product. Then, the computer 34 can set each temperature condition for each product type.
【００１４】ここで、曲炉のヒータ温度及び搬送速度等
の曲げ加工条件とフロントガラスの品質（Ｗ値）との相
関関係について説明する。本件出願人はフロントガラス
のＷ値に影響を与える要因として、台車の癖、曲炉
内のガラス温度、搬送速度、空焼等があることをデ
ータの分析結果から得た。すなわち、のフロントガラ
スのＷ値ばらつきは、台車毎に明らかに癖をもってい
る。例えば、台車重量の差異が熱吸収量の差異となり、
フロントガラスのＷ値にばらつきが生じる。Here, the correlation between the bending conditions such as the heater temperature and the conveying speed of the bending furnace and the quality (W value) of the windshield will be described. The applicant of the present application obtained from the analysis result of the data that factors such as the habit of the carriage, the temperature of the glass in the bending furnace, the conveying speed, and the baking are factors that affect the W value of the windshield. That is, the variation in the W value of the windshield of (3) clearly has a habit for each carriage. For example, the difference in the weight of the trolley results in the difference in heat absorption,
The W value of the windshield varies.
【００１５】また、のＷ値は曲炉内のガラス温度に左
右される。すなわち、曲炉内のガラス温度が高くなると
フロントガラスのＷ値が大きくなり、曲炉内のガラス温
度が低くなるとフロントガラスのＷ値が小さくなる。さ
らに、のＷ値は曲炉の搬送速度に左右される。すなわ
ち、曲炉の搬送速度が速くなるとフロントガラスのＷ値
が小さくなり、曲炉の搬送速度が遅くなるとフロントガ
ラスのＷ値が大きくなる。The W value of is dependent on the glass temperature in the bending furnace. That is, the W value of the windshield increases as the glass temperature in the bending furnace increases, and the W value of the windshield decreases as the glass temperature in the bending furnace decreases. Further, the W value of is dependent on the transport speed of the bending furnace. That is, the W value of the windshield decreases as the transport speed of the bending furnace increases, and the W value of the windshield increases as the transport speed of the bending furnace decreases.
【００１６】そして、の板ガラスが載置されない状態
の台車が曲炉内に搬送された場合に生じる空焼により、
曲炉内温度が上昇して空焼後のガラス温度が上昇してフ
ロントガラスのＷ値が大きくなる。上述したフロントガ
ラスのＷ値に影響を与える要因のうち、の曲炉内のガ
ラス温度は曲炉内の雰囲気温度に影響され、曲炉内の雰
囲気温度は外乱やの空焼の発生等に影響される。ここ
で、外乱とは外気温の変動や工場のドアの開閉等の平常
時に起こりうるトラブル以外の変動であり、空焼とは上
述したように板ガラスが載置されない台車、すなわち空
の台車が曲炉内に搬送された状態をいい、この状態はト
ラブル等で発生する。従って、フロントガラスのＷ値を
調整するためには、外乱や空焼を考慮した条件設定が必
要になり、特に、空焼の場合Ｗ値のバラツキに与える影
響が大きい。Then, due to the air burning that occurs when the trolley in which the plate glass is not placed is conveyed into the bending furnace,
The temperature inside the bending furnace rises, the temperature of the glass after air-baking rises, and the W value of the windshield increases. Among the factors that affect the W value of the windshield described above, the glass temperature in the bending furnace is affected by the atmospheric temperature in the bending furnace, and the atmospheric temperature in the bending furnace affects the occurrence of disturbance and air burning. To be done. Here, the disturbance is a fluctuation other than a trouble that can occur in normal times such as a fluctuation in the outside temperature or opening / closing of the door of the factory, and the air-burning is, as described above, a truck on which the plate glass is not mounted, that is, an empty truck is bent. The state of being transported into the furnace. This state occurs due to troubles. Therefore, in order to adjust the W value of the windshield, it is necessary to set conditions in consideration of disturbance and air burning, and in particular, in the case of air burning, there is a great influence on the W value variation.
【００１７】すなわち、加熱ゾーンに設けられたヒータ
の熱エネルギは、通常加熱ゾーン内に搬送された板ガラ
ス等で吸収されて雰囲気温度の上昇が抑制されている。
しかしながら、上述したように空焼の場合加熱ゾーン内
に板ガラスが搬送されないのでヒータの熱エネルギを板
ガラスで吸収することができず、加熱ゾーン内の雰囲気
温度が上昇する。この空焼後の加熱ゾーンに板ガラスが
搬送されると、搬送された板ガラスのＷ値が大きくなり
すぎて目標値の許容範囲内に入らないという問題があ
る。このため、空焼の場合に加熱ゾーンの雰囲気温度が
上昇しないように制御することは、空焼前後のＷ値のバ
ラツキを抑制する上で重要である。That is, the thermal energy of the heater provided in the heating zone is normally absorbed by the sheet glass or the like conveyed in the heating zone, and the rise in the ambient temperature is suppressed.
However, as described above, in the case of air baking, since the plate glass is not conveyed into the heating zone, the heat energy of the heater cannot be absorbed by the plate glass, and the atmospheric temperature in the heating zone rises. When the sheet glass is transported to the heating zone after the air-baking, there is a problem that the W value of the transported sheet glass becomes too large and does not fall within the allowable range of the target value. Therefore, it is important to control the atmospheric temperature of the heating zone so as not to rise in the case of air-burning in order to suppress the variation in the W value before and after air-burning.
【００１８】前記の如く構成された本発明に係る曲炉の
温度制御装置の作用について図４のフローチャートに基
づいて説明する。先ず、コンピュータ３４に予め夫々の
加熱ゾーン毎に板ガラスの有無の状態が表示されたテー
ブルを設定して、次にコンピュータ３４をEVENT 発生待
ちの状態に設定する（ステップ５０）。この状態で、搬
送コンベアが作動して台車が発進すると割り込みがかけ
られる（ステップ５２）。この場合、検出センサ３６は
台車発進毎に搬入口に搬送されてきた台車に板ガラス２
４が載置されているか否かを検知する。そして、検知し
たデータをコンピュータ３４に出力する。The operation of the temperature control device for the bending furnace according to the present invention constructed as described above will be described with reference to the flowchart of FIG. First, the computer 34 is set in advance with a table displaying the presence / absence of the sheet glass for each heating zone, and then the computer 34 is set to the EVENT occurrence waiting state (step 50). In this state, when the transport conveyor operates and the dolly starts, an interrupt is applied (step 52). In this case, the detection sensor 36 attaches the plate glass 2 to the carriage that has been conveyed to the carry-in entrance every time the carriage starts.
It is detected whether or not 4 is placed. Then, the detected data is output to the computer 34.
【００１９】コンピュータ３４は検出センサ３６から入
力されたデータに基づいて予め設定されているテーブル
をシフトする（ステップ５４）。次に、コンピュータ３
４は、シフト前のテーブルとシフト後のテーブルとを比
較する（ステップ５６）。そして、板ガラスの有無の状
態が変化した加熱ゾーンの温度条件を切り換える。この
温度条件は夫々の加熱ゾーン毎に板有り温度条件と空焼
き温度条件が、コンピュータ３４に予め設定されてい
て、シフト前後で加熱ゾーンの板ガラスの有無が変化し
た場合、コンピュータ３４は夫々の温度条件を切り換え
る信号を温度制御部３２に送信する（ステップ５８）。The computer 34 shifts a preset table based on the data input from the detection sensor 36 (step 54). Next, computer 3
4 compares the table before the shift and the table after the shift (step 56). Then, the temperature condition of the heating zone in which the state of the presence or absence of the plate glass has changed is switched. As for this temperature condition, a temperature condition with a plate and a temperature condition with no baking are set in advance in the computer 34 for each heating zone. A signal for switching the condition is transmitted to the temperature controller 32 (step 58).
【００２０】ここで、図３のシフト前後の場合について
説明すると、加熱ゾーンＺ1 が板有り条件から空焼き条
件に変更になり、加熱ゾーンＺ7 が空焼き条件から板有
り条件に変更になる。この場合コンピュータ３４は、加
熱ゾーンＺ1 を板有り温度条件から空焼き温度条件に切
り換えて、加熱ゾーンＺ7 を空焼き温度条件から板有り
温度条件に切り換える信号を温度制御部３２に出力す
る。この場合、コンピュータ３４からヒータユニットま
での通信系のスピードは、通常の台車搬送速度に十分に
対応することができるように設定されている。The case before and after the shift shown in FIG. 3 will now be described. The heating zone Z 1 is changed from the condition with the plate to the air-baked condition, and the heating zone Z 7 is changed from the condition with the plate to the condition with the plate. . In this case, the computer 34 outputs a signal to the temperature control unit 32 to switch the heating zone Z 1 from the temperature condition with the plate to the bake temperature condition and to switch the heating zone Z 7 from the temperature condition with the plate to the temperature condition with the plate. In this case, the speed of the communication system from the computer 34 to the heater unit is set so as to sufficiently correspond to the normal carriage speed of the carriage.
【００２１】次に、温度制御部３２はコンピュータ３４
から送信された切換え信号に基づいて、ヒータユニット
Ｈ1 のヒータ部Ｈ1-1 、Ｈ1-2 、Ｈ1-3 、Ｈ1-4 、Ｈ
1-5 を板有り温度条件から空焼き温度条件に切り換え
て、Ｈ7 のヒータ部（図示せず）を空焼き温度条件から
板有り温度条件に切り換える。このように、温度条件を
切り換えることにより炉内雰囲気温度を一定に保つこと
ができるので、図５に示すようにフロントガラス１４Ａ
のＷ値のバラツキを抑制することができる。Next, the temperature controller 32 is connected to the computer 34.
Based on the switching signal transmitted from the heater unit H 1 , the heater units H 1-1 , H 1-2 , H 1-3 , H 1-4 , H
1-5 is switched from the temperature condition with the plate to the temperature condition with the plate, and the heater portion (not shown) of H 7 is switched from the temperature condition with the plate condition to the temperature condition with the plate. In this way, the temperature of the atmosphere inside the furnace can be kept constant by switching the temperature conditions, so that as shown in FIG.
It is possible to suppress the variation in the W value.
【００２２】図５において縦軸はフロントガラス１４Ａ
のＷ値を示し、横軸は空焼後の１台目からの台車数を示
している。そして、△は空焼制御をした場合のデータで
あり、■は空焼制御をしない場合のデータである。図か
ら明らかなように、空焼制御をしない場合のＷ値は空焼
後の１、２台目のバラツキが大きく、空焼制御をした場
合のＷ値は空焼後の１台目からバラツキが少ない。従っ
て、フロントガラス１４Ａの空焼後の曲率規格外不良を
無くすことができる。次いで、次回判定のためにシフト
後のテーブルをコンピュータ３４に保存する（ステップ
６０）。In FIG. 5, the vertical axis indicates the windshield 14A.
And the horizontal axis shows the number of carriages from the first one after air burning. Further, Δ is data when air-burning control is performed, and ■ is data when air-burning control is not performed. As is clear from the figure, the W value when air-cooling control is not performed greatly varies between the first and second units after air-burning, and the W-value when air-burning control varies from the first unit after air-burning. Less is. Therefore, it is possible to eliminate the defect that the curvature of the windshield 14A is out of the standard after air-baking. Next, the shifted table is stored in the computer 34 for the next determination (step 60).
【００２３】前記実施例では本発明に係る曲炉の温度制
御装置を使用して、自動車用のフロントガラスの品質を
管理する場合について説明したが、これに限らず、フロ
ントガラス以外のガラスや、合成樹脂等のその他の材質
の板状材に使用してもよい。In the above embodiment, the temperature control device for the bending furnace according to the present invention is used to control the quality of the windshield for an automobile. However, the present invention is not limited to this. You may use it for the plate-shaped material of other materials, such as synthetic resin.
【００２４】[0024]
【発明の効果】以上説明したように本発明に係る曲炉の
温度制御方法及び装置によれば、コンピュータは、検出
手段から入力された板状材の有無の検知データに基づい
て、予め設定された加熱ゾーン毎に板状材の有無が示さ
れた最初のテーブルを変更し、この変更したテーブルを
次回のテーブルとして設定する。そして、コンピュータ
は、予め設定された最初のテーブルと次回のテーブルと
を比較して、板状材の有無が変化した加熱ゾーン内の温
度条件を一定に維持するようにヒータユニットの発生熱
量を制御する。As described above, according to the bending furnace temperature control method and apparatus according to the present invention, the computer is preset based on the detection data of the presence or absence of the plate-shaped material inputted from the detection means. The first table showing the presence or absence of the plate-shaped material is changed for each heating zone, and the changed table is set as the next table. Then, the computer compares the preset first table with the next table and controls the amount of heat generated by the heater unit so as to maintain a constant temperature condition in the heating zone where the presence or absence of the plate-shaped material changes. To do.
【００２５】このように、板状材の有無が変化した加熱
ゾーン内の温度条件をコンピュータで自動的に一定に維
持することができるので、加熱ゾーン内で板状材の有無
が変化した場合でも板状材の最大曲深さを目標値の許容
範囲内に入れることができ、これにより生産性の向上を
図ることができる。As described above, since the temperature condition in the heating zone where the presence or absence of the plate-like material changes can be automatically maintained constant by the computer, even when the presence or absence of the plate-like material changes in the heating zone. The maximum bending depth of the plate-shaped material can be set within the allowable range of the target value, so that the productivity can be improved.
【図１】本発明に係る曲炉の温度制御装置の概略図FIG. 1 is a schematic diagram of a temperature control device for a bending furnace according to the present invention.
【図２】曲炉の加熱ゾーンに取り付けられたヒータユニ
ットを説明する説明図FIG. 2 is an explanatory view illustrating a heater unit attached to a heating zone of a bending furnace.
【図３】図３（Ａ）及び（Ｂ）はそれぞれ変更前のテー
ブル及び変更後のテーブルを説明する説明図FIG. 3A and FIG. 3B are explanatory diagrams illustrating a table before change and a table after change, respectively.
【図４】本発明に係る曲炉の温度制御方法を説明するフ
ローチャートFIG. 4 is a flowchart illustrating a temperature control method for a bending furnace according to the present invention.
【図５】本発明に係る曲炉の温度制御方法を実施した場
合と実施しない場合のＷ値を比較したグラフFIG. 5 is a graph comparing W values with and without the temperature control method for a bending furnace according to the present invention.
１０…曲炉 １２…台車 １４…板ガラス（板状材） １４Ａ…フロントガラス ３０…曲炉の温度制御装置 ３２…温度制御部 ３４…コンピュータ ３６…検出センサ（検出手段） Ｈ1 〜Ｈ15…ヒータユニット Ｚ1 〜Ｚ15…加熱ゾーン10 ... music furnace 12 ... carriage 14 ... glass sheet (plate-like member) 14A ... temperature control device 32 ... temperature control unit 34 ... computer 36 ... detection sensor of the windshield 30 ... music furnace (detecting means) H 1 to H 15 ... heater Units Z 1 to Z 15 ... Heating zone
Claims (2)
ると共に前記加熱ゾーン毎にヒータユニットを設け、該
夫々のヒータユニットで前記複数の加熱ゾーン内の夫々
を加熱すると共に台車を前記複数の加熱ゾーンに沿って
搬送して、台車に載置された板状材を曲げ成形する曲炉
の温度制御方法において、 （１）前記複数の加熱ゾーン毎に板状材の有無が示され
た最初のテーブルを作成する工程と、 （２）前記複数の加熱ゾーン内に新たに搬入される台車
に板状材が載置されているか否かを入口側で検知する工
程と、 （３）前記検知する工程で得られた板状材の有無の検知
データに基づいて前記最初のテーブルを変更し、該変更
したテーブルを次回のテーブルとする工程と、 （４）前記最初のテーブルと次回のテーブルとを比較し
て、前記板状材の有無が変化した加熱ゾーン内の温度条
件を一定に維持するように前記ヒータユニットの発生熱
量を制御する工程と、 から成り、前記次回のテーブルを最初のテーブルとして
前記（１）〜（４）の工程を繰返し行うことを特徴とす
る曲炉の温度制御方法。1. A plurality of heating zones are provided in series, a heater unit is provided for each heating zone, each heater unit heats each of the plurality of heating zones, and a carriage is heated by the plurality of heating zones. In a temperature control method of a bending furnace which conveys along a zone and bends and forms a plate-shaped material placed on a trolley, (1) the first presence / absence of the plate-shaped material is indicated for each of the plurality of heating zones. A step of creating a table; (2) a step of detecting whether or not a plate-shaped material is placed on a carriage newly carried into the plurality of heating zones on the inlet side; and (3) the detection Changing the first table based on the detection data of the presence or absence of the plate-shaped material obtained in the step, and making the changed table the next table; (4) the first table and the next table Compare the above Controlling the amount of heat generated by the heater unit so as to maintain a constant temperature condition in the heating zone in which the presence or absence of the sheet-like material has changed, and (1) to ( A temperature control method for a bending furnace, which is characterized in that the step 4) is repeated.
ると共に前記加熱ゾーン毎にヒータユニットを設け、該
夫々のヒータユニットで前記複数の加熱ゾーン内の夫々
を加熱すると共に台車を前記複数の加熱ゾーンに沿って
搬送して、台車に載置された板状材を曲げ成形する曲炉
の温度制御装置において、 前記複数の加熱ゾーン内の温度条件を個別に制御するた
めに、前記ヒータユニットの発生熱量を制御する温度制
御部と、 前記複数の加熱ゾーン内に新たに搬入される台車に板状
材が載置されているか否かを入口側で検知する検出手段
と、 該検出手段から入力された前記板状材の有無の検知デー
タに基づいて、予め設定された加熱ゾーン毎に板状材の
有無が示された最初のテーブルを変更すると共に該変更
したテーブルを次回のテーブルとし、前記最初のテーブ
ルと次回のテーブルとを比較して、前記板状材の有無が
変化した加熱ゾーン内の温度条件が一定に維持されるよ
うに前記ヒータユニットの発生熱量を制御する信号を前
記温度制御部に出力し、前記次回のテーブルを最初のテ
ーブルとして以下繰返し前記作動を行うコンピュータ
と、 を備えた曲炉の温度制御装置。2. A plurality of heating zones are provided in series, a heater unit is provided for each heating zone, each heater unit heats each of the plurality of heating zones, and a carriage is heated by the plurality of heating zones. In a temperature control device for a bending furnace that conveys along a zone and bends and forms a plate-shaped material placed on a trolley, in order to individually control the temperature conditions in the plurality of heating zones, the heater unit A temperature control unit that controls the amount of heat generated, a detection unit that detects whether or not a plate-shaped material is placed on a carriage that is newly loaded into the plurality of heating zones, and an input from the detection unit. Based on the detected data of the presence or absence of the plate-shaped material, the first table showing the presence or absence of the plate-shaped material is changed for each preset heating zone, and the changed table is set as the next table. Then, by comparing the first table and the next table, a signal for controlling the amount of heat generated by the heater unit is maintained so that the temperature condition in the heating zone where the presence or absence of the plate-like material is changed is kept constant. A temperature control device for a bending furnace, comprising: a computer that outputs the temperature to the temperature control unit and repeats the following operations using the next table as a first table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19728093A JP3570433B2 (en) | 1993-08-09 | 1993-08-09 | Bending furnace temperature control method and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19728093A JP3570433B2 (en) | 1993-08-09 | 1993-08-09 | Bending furnace temperature control method and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0753229A true JPH0753229A (en) | 1995-02-28 |
| JP3570433B2 JP3570433B2 (en) | 2004-09-29 |
Family
ID=16371840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19728093A Expired - Fee Related JP3570433B2 (en) | 1993-08-09 | 1993-08-09 | Bending furnace temperature control method and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3570433B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998045214A1 (en) * | 1997-04-04 | 1998-10-15 | Asahi Glass Company Ltd. | Glass plate bending method and apparatus |
| US6240746B1 (en) | 1997-04-04 | 2001-06-05 | Asahi Glass Company Ltd. | Glass plate bending method and apparatus |
| WO2006095007A1 (en) * | 2005-03-10 | 2006-09-14 | Glaverbel | Method of bending glass sheets |
| WO2006095006A1 (en) * | 2005-03-10 | 2006-09-14 | Glaverbel | Method and device for bending glass sheets |
| WO2007138214A1 (en) * | 2006-05-26 | 2007-12-06 | Saint-Gobain Glass France | Heating objects on a line-production oven |
| CN108745956A (en) * | 2018-06-21 | 2018-11-06 | 广东拓斯达科技股份有限公司 | Glass dropping fraction location detecting apparatus and method, computer readable storage medium |
-
1993
- 1993-08-09 JP JP19728093A patent/JP3570433B2/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998045214A1 (en) * | 1997-04-04 | 1998-10-15 | Asahi Glass Company Ltd. | Glass plate bending method and apparatus |
| US6240746B1 (en) | 1997-04-04 | 2001-06-05 | Asahi Glass Company Ltd. | Glass plate bending method and apparatus |
| WO2006095007A1 (en) * | 2005-03-10 | 2006-09-14 | Glaverbel | Method of bending glass sheets |
| WO2006095006A1 (en) * | 2005-03-10 | 2006-09-14 | Glaverbel | Method and device for bending glass sheets |
| BE1016541A3 (en) * | 2005-03-10 | 2007-01-09 | Glaverbel | Method and device for bending glass sheets. |
| BE1016542A3 (en) * | 2005-03-10 | 2007-01-09 | Glaverbel | Method and device for bending glass sheets. |
| WO2007138214A1 (en) * | 2006-05-26 | 2007-12-06 | Saint-Gobain Glass France | Heating objects on a line-production oven |
| US10662105B2 (en) | 2006-05-26 | 2020-05-26 | Saint-Gobain Glass France | Heating objects on a line-production oven |
| CN108745956A (en) * | 2018-06-21 | 2018-11-06 | 广东拓斯达科技股份有限公司 | Glass dropping fraction location detecting apparatus and method, computer readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3570433B2 (en) | 2004-09-29 |
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