JPS634467B2 - - Google Patents
Info
- Publication number
- JPS634467B2 JPS634467B2 JP9672983A JP9672983A JPS634467B2 JP S634467 B2 JPS634467 B2 JP S634467B2 JP 9672983 A JP9672983 A JP 9672983A JP 9672983 A JP9672983 A JP 9672983A JP S634467 B2 JPS634467 B2 JP S634467B2
- Authority
- JP
- Japan
- Prior art keywords
- steel plate
- paint
- spraying
- spray gun
- skew
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 40
- 239000010959 steel Substances 0.000 claims description 40
- 239000003973 paint Substances 0.000 claims description 31
- 239000011248 coating agent Substances 0.000 claims description 27
- 238000000576 coating method Methods 0.000 claims description 27
- 239000007921 spray Substances 0.000 claims description 26
- 238000005507 spraying Methods 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 5
- 238000010422 painting Methods 0.000 description 10
- 230000001934 delay Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000003708 edge detection Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Spray Control Apparatus (AREA)
Description
本発明は、鋼板自動塗装機における塗料の無駄
吹き防止方法に関するものである。
従来、鋼板の自動塗装は、第１図に示す如く、
ローラーテーブル１上を一定の速度で進んでくる
被塗装鋼板２のエツジを、自動塗装機３の入側に
おいて、被塗装鋼板２の幅方向に移動するエツジ
検出センサー４により検出すると共に、このエツ
ジ検出センサー４と同期して、自動塗装機３内の
上部を被塗装鋼板２の幅方向に移動する塗装幅設
定装置５が、スプレーガン６を制御する位置に設
定される。
そしてスプレーガン６のキヤリヤー７に設けら
れているストライカー７ａが、前記塗装幅設定装
置５に設けられている両側の塗装指示センサー５
ａのいずれかによつて検出されると、スプレーガ
ン６に対するオン・オフ信号を発信し、塗料の吹
付け開始、吹止め制御を行い、塗料のオーバース
プレーロス（無駄吹き）を最小にとどめるように
している。
しかしながら、塗料の無駄吹きを最小にとどめ
ることができる条件としては、被塗装鋼板２のエ
ツジが自動塗装機３に対し直角になつて、被塗装
鋼板２が自動塗装機３へ進入したときだけであ
る。
被塗装鋼板２の両側エツジは、互いに平行に仕
上げ切断されているのであるが、被塗装鋼板２は
多くの場合、被塗装鋼板２を自動塗装機３の入側
のローラーテーブル１上へ載置する際の精度不良
やローラーテーブル１の偏摩耗等に起因して、第
２図に示す如く、若干斜行して自動塗装機３に進
入する。
ところが、前記塗装幅設定装置５による塗装幅
の設定は、被塗装鋼板２が自動塗装機３へ進入す
る際に一回行うのみであり、斜行による塗り残し
を防止するために、予め被塗装鋼板２の斜行を見
込んで、斜行量ａ分だけ余計に塗装幅を設定して
おり、従つて第２図の如く、斜線で示す部分に塗
料の無駄吹きが発生していた。
本発明は、かくの如き被塗装鋼板の斜行による
塗料の無駄吹きを解消すべく、一定の速度にて送
られる被塗装鋼板の斜行量を、自動塗装機の入側
において計測し、この斜行量の計測値に基づき、
スプレーガンの塗料吹付け、吹止め目標位置が被
塗装鋼板のエツジとなるよう、スプレーガンの空
走距離を修正制御することを要旨とする。
以下に本発明を第３図乃至第４図Ａ，Ｂにより
説明する。
第３図は、スプレーガン６の塗料吹付け、吹止
め時の制御方法の説明図であつて、第３図では、
すでにエツジ検出センサー４が、自動塗装機３へ
進入する被塗装鋼板２の他方側のエツジを検出し
た位置にて停止しており、このエツジ検出センサ
ー４に同期して移動した塗装幅設定装置５が、塗
装幅制御を行う最適位置（吹付け、吹止め目標位
置は被塗装鋼板のエツジ）に停止しているものと
する。
スプレーガン６のキヤリヤー７は、被塗装鋼板
２の幅方向に往復移動するのであるが、いま被塗
装鋼板２の他方側における吹付け開始側を例にと
ると、キヤリヤー７のストライカー７ａの一方
が、塗装幅設定装置５の他方の塗装指示センサー
５ａによつて検出されると、計数回路が作動して
キヤリヤー７の移動距離をカウントし、予め設定
されている遅延距離L1に達したとき塗料吹付け
信号を発信し、機械的、電気的制御遅れにより発
生する距離L2を移動した後、スプレーガン６か
ら塗料が噴射され、塗装を行う。
なお、予め設定する遅延距離L1とは、ストラ
イカー７ａの一方が、他方の塗装指示センサー５
ａによつて検出されてから、塗料吹付け信号を発
信するまでの距離であつて、任意の値に設定可能
である。
また機械的制御遅れとは、例えば電磁弁の開閉
時間、スプレーガン６の開閉時間等の遅れであ
り、さらに電気的制御遅れとは、例えば電磁リレ
ーの動作時間の遅れであつて、これ等機械的、電
気的制御遅れは、自動塗装機３の固有のものであ
り、遅延距離L2は通常約200〜300mmである。
そして塗料吹止め側も上述の吹付け開始側と同
じ要領で、ストライカー７ａの他方が、塗装幅設
定装置５の一方の塗装指示センサー５ａによつて
検出されると、計数回路が作動してキヤリヤー７
の移動距離をカウントし、予め設定されている遅
延距離L1′に達したとき塗料吹止め信号を発信し、
機械的、電気的制御遅れにより発生する距離
L2′を移動した後、塗料の吹付けを停止する。
なお、吹付け、吹止めの目標位置は、被塗装鋼
板２のエツジとする。
また被塗装鋼板２の一方側における塗料の吹付
け開始、吹止めの制御も、上述の被塗装鋼板２の
他方側における塗料の吹付け開始、吹止めの制御
と同様に行われる。
さらにキヤリヤー７の往復の移動距離は、その
自動塗装機３において塗装可能な被塗装鋼板２の
最大板幅に対応した常時一定のものであつて、例
えば板幅の狭い被塗装鋼板２を塗装する場合は、
キヤリヤー７の往復の移動距離は、最大板幅の被
塗装鋼板２を塗装するときと同じであるが、塗料
を噴射しない所謂スプレーガン６の空走距離が長
くなるよう、塗料の吹付け開始、吹止めの制御が
行われる。
さて、本発明では、第３図、第４図Ａ，Ｂに示
す如く、自動塗装機３の入側に、ローラーテーブ
ル１上を一定の速度で進んでくる被塗装鋼板２の
斜行量ａを計測する斜行量計測器８を設け、第４
図Ａ，Ｂの如く、被塗装鋼板２に斜行があると、
斜行量計測器８によつて被塗装鋼板２の斜行量ａ
を計測し、この斜行量ａの計測値に基づき、スプ
レーガン６の塗料吹付け、吹止め目標位置が被塗
装鋼板２のエツジとなるよう、スプレーガン６の
空走距離、すなわち遅延距離L1，L1′を修正制御
して、塗料の無駄吹きを防止するようにしたので
ある。
ここで、ストライカー７ａを塗装指示センサー
５ａがキヤツチしてから塗料が噴射されるまでの
距離計算を下記第１表に示す。
The present invention relates to a method for preventing wasteful spraying of paint in an automatic steel plate coating machine. Conventionally, automatic painting of steel plates has been carried out as shown in Figure 1.
An edge detection sensor 4 that moves in the width direction of the steel plate 2 to be coated detects the edge of the steel plate 2 moving at a constant speed on the roller table 1 on the entry side of the automatic coating machine 3. A coating width setting device 5 that moves the upper part of the automatic coating machine 3 in the width direction of the steel plate 2 to be coated in synchronization with the detection sensor 4 is set at a position where the spray gun 6 is controlled. The striker 7a provided on the carrier 7 of the spray gun 6 is connected to the painting instruction sensors 5 on both sides provided on the painting width setting device 5.
When detected by either a, an on/off signal is sent to the spray gun 6 to start spraying the paint and control the spraying stop to minimize overspray loss (waste spraying) of the paint. I have to. However, the condition that can minimize the wasted spraying of paint is only when the edge of the steel plate 2 to be coated is perpendicular to the automatic coating machine 3 and the steel plate 2 to be coated enters the automatic coating machine 3. be. Both edges of the steel plate 2 to be coated are finished and cut parallel to each other, but in many cases the steel plate 2 to be coated is placed on the roller table 1 on the entry side of the automatic coating machine 3. Due to poor accuracy during coating, uneven wear of the roller table 1, etc., the coating machine enters the automatic coating machine 3 in a slightly oblique direction, as shown in FIG. However, the coating width is set by the coating width setting device 5 only once when the steel plate 2 to be coated enters the automatic coating machine 3. In anticipation of the skew of the steel plate 2, the coating width was set to be an extra skew amount a, and as a result, paint was wasted in the shaded areas as shown in FIG. In order to eliminate wasted spraying of paint due to the skewing of the steel plate to be painted, the present invention measures the amount of skew of the steel plate to be coated, which is fed at a constant speed, on the entry side of an automatic coating machine, and Based on the measured value of the amount of skew,
The gist of this method is to correct and control the empty running distance of the spray gun so that the target position for spraying and stopping paint from the spray gun is the edge of the steel plate to be painted. The present invention will be explained below with reference to FIGS. 3A and 4B. FIG. 3 is an explanatory diagram of a method of controlling the spray gun 6 when spraying and stopping paint, and in FIG.
The edge detection sensor 4 has already stopped at the position where it detected the edge on the other side of the steel plate 2 to be coated entering the automatic coating machine 3, and the coating width setting device 5 moves in synchronization with this edge detection sensor 4. is stopped at the optimum position for controlling the coating width (the target position for spraying and stopping is the edge of the steel plate to be coated). The carrier 7 of the spray gun 6 reciprocates in the width direction of the steel plate 2 to be painted. Taking the spraying start side on the other side of the steel plate 2 to be painted as an example, one of the strikers 7a of the carrier 7 moves back and forth in the width direction of the steel plate 2 to be painted. , is detected by the other painting instruction sensor 5a of the painting width setting device 5, a counting circuit is activated to count the moving distance of the carrier 7, and when the preset delay distance L1 is reached, the paint is removed. After transmitting a spraying signal and moving a distance L 2 caused by mechanical and electrical control delays, paint is sprayed from the spray gun 6 to perform painting. Note that the preset delay distance L1 means that one of the strikers 7a is connected to the other painting instruction sensor 5.
This is the distance from when the paint is detected by a to when the paint spray signal is transmitted, and can be set to any value. Mechanical control delays are, for example, delays in the opening and closing times of solenoid valves and spray gun 6, and electrical control delays are, for example, delays in the operating times of electromagnetic relays. The electrical control delay is inherent to the automatic coating machine 3, and the delay distance L2 is usually about 200 to 300 mm. Then, on the paint stopper side, in the same way as the spray start side described above, when the other side of the striker 7a is detected by one painting instruction sensor 5a of the painting width setting device 5, the counting circuit is activated and the carrier 7
counts the moving distance, and when the preset delay distance L1 ' is reached, a paint stop signal is sent,
Distance caused by mechanical and electrical control delays
After moving L 2 ′, stop spraying the paint. Note that the target position for spraying and spraying is the edge of the steel plate 2 to be coated. Furthermore, the control of starting paint spraying and stopping the paint on one side of the steel plate 2 to be painted is performed in the same manner as the control of starting spraying the paint and stopping the blowing on the other side of the steel plate 2 to be painted. Further, the reciprocating distance of the carrier 7 is always constant and corresponds to the maximum width of the steel plate 2 to be coated that can be coated by the automatic coating machine 3. In case,
The reciprocating distance of the carrier 7 is the same as when painting the steel plate 2 with the maximum width, but the so-called spray gun 6, which does not spray paint, has a longer idling distance when spraying the paint. Control of the blow stop is performed. Now, in the present invention, as shown in FIGS. 3 and 4 A and B, the skew amount a of the steel plate 2 to be coated, which is advancing at a constant speed on the roller table 1, is placed on the entry side of the automatic coating machine 3. A skew amount measuring device 8 is provided to measure the amount of skew, and a fourth
As shown in Figures A and B, if there is a skew in the steel plate 2 to be painted,
The skew amount a of the steel plate 2 to be painted is measured by the skew amount measuring device 8.
is measured, and based on the measured value of the skew amount a, the idle running distance of the spray gun 6, that is, the delay distance L, is adjusted so that the paint spraying and stopping target position of the spray gun 6 is the edge of the steel plate 2 to be painted. 1 and L 1 ' to prevent unnecessary spraying of paint. Table 1 below shows the calculation of the distance from when the paint instruction sensor 5a catches the striker 7a until the paint is sprayed.
【表】
なお、遅延距離L1，L1′は、斜行量ａよりも必
ず大きいことが条件となる。
また第１表は、第４図Ｂのような斜行の場合の
距離計算であつて、第４図Ａのような斜行の場合
は、第１表における斜行量ａの＋、−の符号が逆
になる。
さらに、前記斜行量計測器８は、スプレーガン
６の移動線上に設けるのが望ましいが、斜行量計
測器８に塗料が付着すると動作不良となるので、
自動塗装機３の入側に設けたのである。
この場合、斜行量計測器８の設置位置を、スプ
レーガン６が一往復する時間に、被塗装鋼板２が
進む距離ｌの整数倍（ｎ倍）のス位置となし、
（ｎ＋１）段目の記憶回路に斜行量ａを記憶させ、
スプレーガン６が一往復する毎に一段ずつ順次シ
フトさせて、斜行量ａの計側値に基づき、スプレ
ーガン６の塗料吹付け、吹止め目標位置が被塗装
鋼板２のエツジとなるよう、スプレーガン６の空
走距離を修正制御する。
本発明は上述の如く、一定の速度にて送られる
被塗装鋼板の斜行量を、自動塗装機の入側におい
て計測し、この斜行量の計測値に基づき、スプレ
ーガンの塗料吹付け、吹止め目標位置が被塗装鋼
板のエツジとなるよう、スプレーガンの空走距離
を修正制御するので、被塗装鋼板の斜行による塗
料の無駄吹きを確実に防止することができる。[Table] Note that the delay distances L 1 and L 1 ' must always be larger than the skew amount a. In addition, Table 1 shows the distance calculation in the case of skew as shown in Figure 4B, and in the case of skew as shown in Figure 4A, + and - The sign is reversed. Further, it is desirable that the skew amount measuring device 8 is provided on the line of movement of the spray gun 6, but if paint adheres to the skew amount measuring device 8, it will malfunction.
It was installed on the inlet side of the automatic coating machine 3. In this case, the installation position of the skew amount measuring device 8 is set at a position that is an integral multiple (n times) of the distance l that the steel plate 2 to be painted travels during one reciprocation time of the spray gun 6,
Storing the skew amount a in the (n+1)th storage circuit,
Each time the spray gun 6 makes a reciprocation, the spray gun 6 is sequentially shifted one step at a time, and based on the measured value of the skew amount a, the paint is sprayed and the target position of the spray gun 6 is set at the edge of the steel plate 2 to be painted. To correct and control the empty running distance of the spray gun 6. As described above, the present invention measures the amount of skew of a steel plate to be coated that is fed at a constant speed at the entry side of an automatic coating machine, and based on the measured value of this amount of skew, sprays paint from a spray gun. Since the idle running distance of the spray gun is corrected and controlled so that the target stop position is the edge of the steel plate to be painted, it is possible to reliably prevent unnecessary spraying of paint due to skewing of the steel plate to be painted.
第１図は鋼板自動塗装機の概略図、第２図は被
塗装鋼板の斜行と塗料の無駄吹きとの関係を示す
平面的説明図、第３図は鋼板自動塗装機における
本発明方法の実施の一例を示す説明図、第４図
Ａ，Ｂは被塗装鋼板の斜行の向きが異なる場合の
各斜行量の計測を示す平面的説明図である。
Fig. 1 is a schematic diagram of an automatic steel plate coating machine, Fig. 2 is a plan view showing the relationship between skewing of a steel plate to be coated and wasteful spraying of paint, and Fig. 3 is a diagram showing the method of the present invention in an automatic steel plate coating machine. FIGS. 4A and 4B, which are explanatory diagrams showing an example of the embodiment, are planar explanatory diagrams showing measurement of each skew amount when the direction of skew of the steel plate to be coated is different.
Claims (1)
を、自動塗装機の入側において計測し、この斜行
量の計測値に基づき、スプレーガンの塗料吹付
け、吹止め目標位置が被塗装鋼板のエツジとなる
よう、スプレーガンの空走距離を修正制御するこ
とを特徴とする鋼板自動塗装機における塗料の無
駄吹き防止方法。1. The amount of skew of the steel plate to be coated that is being fed at a constant speed is measured at the entry side of the automatic coating machine, and based on the measured value of the amount of skew, the target position of the spray gun for spraying paint and spraying is determined. A method for preventing wasteful spraying of paint in an automatic steel sheet coating machine, characterized by correcting and controlling the empty running distance of a spray gun so as to provide an edge to the painted steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9672983A JPS59222260A (en) | 1983-05-30 | 1983-05-30 | Method for preventing wasteful spraying of paint in automatic painting machine for steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9672983A JPS59222260A (en) | 1983-05-30 | 1983-05-30 | Method for preventing wasteful spraying of paint in automatic painting machine for steel plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59222260A JPS59222260A (en) | 1984-12-13 |
| JPS634467B2 true JPS634467B2 (en) | 1988-01-29 |
Family
ID=14172815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9672983A Granted JPS59222260A (en) | 1983-05-30 | 1983-05-30 | Method for preventing wasteful spraying of paint in automatic painting machine for steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59222260A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4562802B2 (en) * | 2008-04-30 | 2010-10-13 | 有明スチールセンター株式会社 | Automatic painting equipment |
-
1983
- 1983-05-30 JP JP9672983A patent/JPS59222260A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59222260A (en) | 1984-12-13 |
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