阅读说明：本技术 一种喷涂方法和喷涂装置 (Spraying method and spraying device ) 是由 李�浩 杨之诚 缪桦 于 2020-05-29 设计创作，主要内容包括：本申请公开了一种喷涂方法和喷涂装置,本申请公开的喷涂方法中控制器在感应到当前待喷涂工件后,先获得当前待喷涂工件从传感器运行至第一喷枪的第一时间,以及从进入第一喷涂范围至完全离开第一喷涂范围的第二时间；然后判断当前待喷涂工件和上一待喷涂工件的间隔长度是否大于等于第一喷涂范围的长度；若是,则在上一待喷涂工件结束喷涂之后关闭喷枪,等待当前待喷涂工件对应的第一时间,然后开启喷枪；若否,则在上一待喷涂工件结束喷涂时不关闭喷枪,保持开启状态。本申请在相邻待喷涂工件之间的距离较远时,在第二时间后关闭喷枪,能够节省油墨,降低喷涂成本；在相邻待喷涂工件之间的距离较近时,保持喷枪开启,能够提高喷涂效率。(After sensing a current workpiece to be sprayed, a controller of the spraying method firstly obtains a first time from the sensor to the first spray gun of the current workpiece to be sprayed and a second time from entering a first spraying range to completely leaving the first spraying range; then judging whether the interval length between the current workpiece to be sprayed and the previous workpiece to be sprayed is greater than or equal to the length of the first spraying range; if so, closing the spray gun after the previous workpiece to be sprayed is finished spraying, waiting for the first time corresponding to the current workpiece to be sprayed, and then starting the spray gun; if not, the spray gun is not closed when the previous workpiece to be sprayed is finished spraying, and the opening state is kept. When the distance between adjacent workpieces to be sprayed is long, the spray gun is closed after the second time, so that ink can be saved, and the spraying cost can be reduced; when the distance between adjacent workpieces to be sprayed is short, the spray gun is kept open, and the spraying efficiency can be improved.)

1. A spray coating method, characterized in that the spray coating method comprises:

the controller judges whether a sensing signal which is fed back by the sensor and senses the current workpiece to be sprayed is received;

if yes, obtaining a first time required by the current workpiece to be sprayed to run from the sensor to the initial position of a first spraying range of a first spray gun, and a second time required by the current workpiece to be sprayed to completely leave the first spraying range from entering the first spraying range;

judging whether the interval length between the current workpiece to be sprayed and the previous workpiece to be sprayed is greater than or equal to the length of the first spraying range;

if so, issuing a task which is related to the current workpiece to be sprayed and starts from the initial moment of receiving the induction signal corresponding to the current workpiece to be sprayed, controlling the first spray gun to be started after the first time, and continuously starting to be closed after the second time;

and if not, canceling the task of closing the workpiece to be sprayed after the workpiece to be sprayed is continuously opened for the second time, issuing the task of closing the workpiece to be sprayed after the first time since the initial moment of receiving the induction signal corresponding to the workpiece to be sprayed currently is started, and controlling the first spray gun to be opened after the first time and continuously opened after the second time.

2. The spraying method according to claim 1, wherein the determining whether the length of the interval between the current workpiece to be sprayed and the last workpiece to be sprayed is greater than or equal to the length of the first spraying range comprises:

the controller controls the time relay to start timing from the moment when the induction signal of the last workpiece to be sprayed is stopped being received, and controls the time relay to stop timing at the moment when the induction signal of the current workpiece to be sprayed is received for the first time, so that the time difference between the moment when the last workpiece to be sprayed leaves the sensor and the moment when the current workpiece to be sprayed reaches the sensor is obtained;

and obtaining the interval length between the current workpiece to be sprayed and the last workpiece to be sprayed according to the time difference and the movement speed of the current workpiece to be sprayed.

3. The method of claim 1, wherein obtaining the first time and the second time before the controller receives the sensing signal further comprises:

the controller judges whether the current workpiece to be sprayed has a corresponding code;

if not, the current workpiece to be sprayed and a plurality of workpieces to be sprayed behind the current workpiece to be sprayed are sequentially coded; the number of the codes is the maximum value of the number of the workpieces to be sprayed, which can be contained in the spraying bin.

4. The spray coating method of claim 3 wherein said controlling said first spray gun to turn on after said first time and to turn off after said second time, further comprises:

and the controller binds and stores the code, the first time and the second time of the current workpiece to be sprayed.

5. The spraying method according to claim 3, characterized in that in the current running direction of the workpiece to be sprayed, the first spray gun is further provided with a second spray gun at the side away from the sensor, and the first spraying range of the first spray gun is not overlapped with the second spraying range of the second spray gun;

after the controller receives the induction signal of the current workpiece to be sprayed, the method further comprises the following steps: and obtaining a third time required by the current workpiece to be sprayed to run from the sensor to the starting position of the second spraying range and a fourth time required by the current workpiece to be sprayed to completely leave the second spraying range from entering the second spraying range.

6. The method of claim 5, wherein after obtaining the third time and the fourth time, further comprising:

the controller judges whether the interval length between the current workpiece to be sprayed and the previous workpiece to be sprayed is greater than or equal to the length of the second spraying range;

if so, issuing a task which is related to the current workpiece to be sprayed and starts from the initial moment of receiving the induction signal corresponding to the current workpiece to be sprayed, controlling the second spray gun to be started after the third time, and continuously starting to be closed after the fourth time;

otherwise, canceling the task of closing the workpiece to be sprayed after the workpiece to be sprayed is continuously opened for the fourth time, issuing the task of closing the workpiece to be sprayed after the second spray gun is continuously opened for the fourth time, starting from the initial moment when the induction signal corresponding to the workpiece to be sprayed is received, and controlling the second spray gun to be opened after the third time.

7. The spray coating method of claim 6 wherein said controller controls said second spray gun to turn on after said third time and to turn off after continuing to turn on for said fourth time, and further comprising:

and the controller binds and stores the code, the third time and the fourth time of the current workpiece to be sprayed.

8. The spray coating method according to claim 1, wherein said obtaining a first time required for said workpiece to be currently sprayed to travel from said sensor to a start position of a first spray range of a first spray gun and a second time required for said workpiece to be currently sprayed to completely leave said first spray range from entering said first spray range comprises:

and obtaining the first time according to the distance between the sensor and the first spray gun and the movement speed of the current workpiece to be sprayed, and obtaining the second time according to the length of the current workpiece to be sprayed, the length of the first spraying range and the movement speed.

9. The method of claim 8, wherein said obtaining said first time and said second time is preceded by:

the controller controls the time relay to start timing from the moment when the induction signal of the current workpiece to be sprayed is received, and controls the time relay to stop timing at the moment when the induction signal of the current workpiece to be sprayed is stopped being received, so that fifth time required by the current workpiece to be sprayed to pass through the sensor is obtained;

and obtaining the length of the current workpiece to be sprayed according to the fifth time and the movement speed.

10. A spray coating device comprising an inductor, a time relay, a memory, and a controller coupled to the inductor, the time relay, and the memory, wherein the memory stores program instructions that, in cooperation with the inductor and the time relay, are operable to implement the spray coating method of any one of claims 1-9.

Technical Field

The present application relates to the field of spray coating technology, and in particular, to a spray coating method and a spray coating apparatus.

Background

In the existing workpiece production flow, workpieces sequentially pass through the processes before the spraying process, then sequentially enter a spraying bin and are sprayed by a spray gun. Due to the inconsistent speed of the previous process, the interval length between the workpieces is inconsistent, and the situation that two adjacent workpieces are close to each other or the situation that two adjacent workpieces are far from each other may occur. In order to prevent the condition that the workpiece is leaked to be sprayed, the spray gun is opened after the workpiece enters the spraying bin and is kept in an open state until all the workpieces are sprayed, so that the ink waste is serious, and the spraying cost is increased.

Disclosure of Invention

The application mainly solves the technical problem of providing a spraying method and a spraying device, which can save ink and reduce spraying cost.

In order to solve the technical problem, the application adopts a technical scheme that:

there is provided a spray coating method comprising:

the controller judges whether a sensing signal which is fed back by the sensor and senses the current workpiece to be sprayed is received;

if yes, obtaining a first time required by the current workpiece to be sprayed to run from the sensor to the initial position of a first spraying range of a first spray gun, and a second time required by the current workpiece to be sprayed to completely leave the first spraying range from entering the first spraying range;

judging whether the interval length between the current workpiece to be sprayed and the previous workpiece to be sprayed is greater than or equal to the length of the first spraying range;

if so, issuing a task which is related to the current workpiece to be sprayed and starts from the initial moment of receiving the induction signal corresponding to the current workpiece to be sprayed, controlling the first spray gun to be started after the first time, and continuously starting to be closed after the second time;

and if not, canceling the task of closing the workpiece to be sprayed after the workpiece to be sprayed is continuously opened for the second time, issuing the task of closing the workpiece to be sprayed after the first time since the initial moment of receiving the induction signal corresponding to the workpiece to be sprayed currently is started, and controlling the first spray gun to be opened after the first time and continuously opened after the second time.

In order to solve the above technical problem, another technical solution adopted by the present application is:

the spraying device comprises an inductor, a time relay, a memory and a controller which is respectively coupled with the inductor, the time relay and the memory, wherein the memory stores program instructions, and the controller can operate the program instructions by matching with the inductor and the time relay so as to realize the spraying method in the technical scheme.

The beneficial effect of this application is: different from the prior art, the controller firstly obtains a first time required by the current workpiece to be sprayed to run from the sensor to the first spray gun and a second time required by the current workpiece to be sprayed to completely leave the first spraying range after sensing the current workpiece to be sprayed; then judging whether the interval length between the current workpiece to be sprayed and the previous workpiece to be sprayed is greater than or equal to the length of the first spraying range; if the spraying range is within the first spraying range, the current workpiece to be sprayed and the previous workpiece to be sprayed are not in the first spraying range at the same time, the spray gun can be closed after the previous workpiece to be sprayed is sprayed, the first time corresponding to the current workpiece to be sprayed is waited, and then the spray gun is started to spray the current workpiece to be sprayed; if not, the workpiece to be sprayed is judged to be in the first spraying range when the workpiece to be sprayed does not completely leave the first spraying range, the workpiece to be sprayed currently enters the first spraying range, the spray gun is not closed when the workpiece to be sprayed is sprayed, the workpiece to be sprayed is kept in an open state, and the workpiece to be sprayed currently is sprayed continuously. When the distance between adjacent workpieces to be sprayed is long, the spray gun is closed after the second time, so that ink can be saved, and the spraying cost can be reduced; when the distance between adjacent workpieces to be sprayed is short, the spray gun is kept open, and the spraying efficiency can be improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts. Wherein:

FIG. 1 is a schematic flow chart of one embodiment of a spray coating method of the present application;

FIG. 2 is a schematic structural view of an embodiment of a spray coating line;

FIG. 3 is a schematic flow chart illustrating one embodiment of obtaining a length of a workpiece to be painted;

FIG. 4 is a schematic flow chart illustrating one embodiment of encoding a workpiece to be sprayed;

FIG. 5 is a schematic structural view of another embodiment of a spray coating line;

FIG. 6 is a schematic flowchart of an embodiment of obtaining a distance between a current workpiece to be sprayed and a previous workpiece to be sprayed;

FIG. 7 is a schematic structural view of another embodiment of a spray coating line;

FIG. 8 is a schematic structural view of another embodiment of a spray coating line;

FIG. 9 is a schematic flow chart of another embodiment of a spray coating method of the present application;

fig. 10 is a schematic structural diagram of an embodiment of the spray coating device of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments that can be obtained by a person skilled in the art without making any inventive step based on the embodiments in the present application belong to the protection scope of the present application.

Referring to fig. 1, fig. 1 is a schematic flow chart of an embodiment of a spraying method according to the present application, the spraying method including the following steps:

s101, judging whether a sensing signal which is fed back by a sensor and senses the current workpiece to be sprayed is received by a controller.

Specifically, referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of a spraying production line. When a workpiece to be sprayed (such as a workpiece a to be sprayed, a workpiece B to be sprayed, and a workpiece C to be sprayed) runs on a production line, the workpiece to be sprayed first passes through a sensor 10 fixedly arranged on the production line, and then passes through a spraying bin (not shown), and the workpiece to be sprayed receives spraying of a spray gun (such as a first spray gun 11) in the spraying bin. The sensor 10 is in communication with a controller (not shown), and when sensing a sensing signal of the workpiece a to be painted currently, the sensing signal is fed back to the controller, and the controller considers that the workpiece a to be painted currently passes through the sensor 10. In addition, when any workpiece to be painted on the production line passes by the sensor 10, it is defined as the current workpiece to be painted as described throughout this application.

S102, if yes, obtaining a first time required by the current workpiece to be sprayed to move from the sensor to the initial position of the first spraying range of the first spray gun, and a second time required by the current workpiece to be sprayed to completely leave the first spraying range from entering the first spraying range.

After the controller receives the sensing signal of the current workpiece a to be sprayed fed back by the sensor 10, the controller calculates a first time t required for the current workpiece a to be sprayed to move from the sensor 10 to the initial position of the first spraying range of the first spray gun 11₁And a second time t required for the workpiece A to be sprayed to completely leave the first spraying range from entering the first spraying range₂。

Specifically, the first time t is calculated in the following manner₁And a second time t₂。

According to the distance L between the sensor 10 and the first spray gun 11₀And calculating the first time t according to the movement speed v of the current workpiece A to be sprayed₁And according to the length L of the current workpiece A to be sprayed₁Length D of first spraying range₁And the movement velocity v obtains a second time t₂. That is, the following formula is used for calculation:

t₁＝L₀/v；

t₂＝(L₁+D₁)/v。

wherein, the moving speed v of the workpiece A to be sprayed can be obtained by a velometer arranged on the production line. The velocimeter is communicated with the controller, and feeds back to the controller after obtaining the movement velocity v of the workpiece A to be sprayed. The workpieces to be sprayed on the production line preferably run forwards in a constant speed mode. The motion speed v of the workpiece to be sprayed can also be set in advance and stored in the controller in advance, and the controller can be directly called when needed.

Referring to fig. 3, fig. 3 is a flow chart illustrating an embodiment of obtaining the length of the workpiece to be sprayed, and before step S102, the first time t is calculated₁And a second time t₂Before, the length L of the current workpiece A to be sprayed needs to be obtained₁Specifically, the length L of the workpiece A to be sprayed at present is obtained through the following steps₁：

S201, the controller controls the time relay to start timing from the moment when the induction signal of the current workpiece to be sprayed is received, and controls the time relay to stop timing at the moment when the induction signal of the current workpiece to be sprayed is stopped being received, so that fifth time required by the current workpiece to be sprayed to pass through the sensor is obtained.

Specifically, referring to fig. 2, a time relay (not shown) is in communication with the controller, and after receiving the sensing signal of the current workpiece a to be sprayed fed back by the sensor 10, the controller controls the time relay to start timing from the moment when the sensing signal of the current workpiece a to be sprayed is received, and controls the time relay to stop timing at the moment when the sensing signal of the current workpiece a to be sprayed is stopped being received, so as to obtain a fifth time t required for the current workpiece a to be sprayed to pass through the sensor 10₅。

And S202, obtaining the length of the current workpiece to be sprayed according to the fifth time and the movement speed.

The workpiece A to be sprayed passes through the sensor 10 at a constant speed at a movement speed v, and the consumed time is the fifth time t₅According to a fifth time t₅Obtaining the length L of the current workpiece A to be sprayed according to the movement speed v₁Then, the calculation of the first time t is performed₁And a second time t₂The step (2). That is, the length L of the current workpiece A to be sprayed is calculated by the following formula₁：

L₁＝v*t₅。

The lengths of the workpieces to be sprayed on the production line may be different, but the length data does not change in the production flow, and in other embodiments, the length L of the workpiece a to be sprayed may not be obtained by the method described in steps S201 to S202₁Instead, the length of each workpiece to be sprayed is measured by the advance and stored, and the controller calculates the first time t when needed₁And a second time t₂And can be directly called.

In different embodiments, i.e. in different production lines, the distance L between the controller 10 and the first spray gun 11₀May vary when the distance L between the controller 10 and the first spray gun 11₀In a case where a plurality of workpieces to be sprayed may exist between the workpiece a to be sprayed and the controller 10 when the workpiece a to be sprayed runs to the first spray gun 11, and the controller may make an error in distinguishing between the workpieces to be sprayed at this time, in such an embodiment, before step S102, the workpieces to be sprayed may be encoded, so that the controller can clearly distinguish between the workpieces to be sprayed. Specifically, referring to fig. 4, fig. 4 is a schematic flow chart illustrating an embodiment of encoding a workpiece to be sprayed, including the following steps:

s301, the controller judges whether the current workpiece to be sprayed has a corresponding code.

If the workpiece A to be sprayed has the corresponding code, the controller can clearly distinguish the workpiece A from other workpieces to be sprayed, so that before the code, the controller judges whether the workpiece A to be sprayed has the corresponding code.

S302, if not, sequentially coding the current workpiece to be sprayed and a plurality of workpieces to be sprayed; the number of the codes is the maximum value of the number of the workpieces to be sprayed, which can be accommodated by the spraying bin.

If the current workpiece A to be sprayed does not have a corresponding code, the controller sequentially codes the current workpiece A to be sprayed and a plurality of workpieces to be sprayed behind the current workpiece A to be sprayed; the number of the codes is the maximum value of the number of the workpieces to be sprayed, which can be accommodated by the spraying bin. For example, the number of workpieces to be sprayed which can be accommodated in the spraying bin at most is m, the current workpiece a to be sprayed is the first of the m, when the controller receives the sensing signal corresponding to the current workpiece a to be sprayed, it is determined that the current workpiece a to be sprayed does not have the corresponding code, then the total m workpieces to be sprayed including the current workpiece a to be sprayed and m-1 workpieces to be sprayed after the current workpiece a to be sprayed are sequentially coded, each workpiece to be sprayed obtains one code, and the codes are different from each other. At this time, when a workpiece B to be sprayed (see fig. 2) next to the workpiece a to be sprayed passes through the sensor 10, the controller determines that the workpiece B has a corresponding code, and does not need to encode the workpiece B again. When the last workpiece to be sprayed of the m workpieces to be sprayed leaves the first spraying range, the controller judges that the workpiece to be sprayed does not have the corresponding code when the latter workpiece to be sprayed is sensed, and then the m workpieces to be sprayed of the next round are sequentially coded. When the number of the workpieces to be sprayed in the last round is less than m, each workpiece to be sprayed is also endowed with a different code.

When the controller codes the current workpiece A to be sprayed and calculates the first time t required by the sensor 10 to move to the initial position of the first spraying range of the first spray gun 11 corresponding to the current workpiece A to be sprayed₁And a second time t required for the workpiece A to be sprayed to completely leave the first spraying range from entering the first spraying range₂Then, the first time t is followed for executing₁And a second time t₂Controlling the spraying process of the current workpiece A to be sprayed, wherein the controller needs to firstly encode the current workpiece A to be sprayed and the first time t₁A second time t₂And performing binding storage.

The embodiment encodes a plurality of workpieces to be sprayed, and encodes the workpieces to be sprayed with the first time t₁A second time t₂The binding and storing operation is carried out, so that the controller can clearly distinguish a plurality of workpieces to be sprayed in the spraying bin, the probability of spray leakage is reduced, and the product yield on a production line is improved; and the controller can be used for sequentially controlling the spray guns through coding.

S103, judging whether the interval length between the current workpiece to be sprayed and the previous workpiece to be sprayed is greater than or equal to the length of the first spraying range.

The workpieces to be sprayed are subjected to other processes before being subjected to the spraying process, and due to the fact that the rates of the previous processes are inconsistent, the interval length between the workpieces to be sprayed is inconsistent, the situation that two adjacent workpieces to be sprayed are close to each other may occur, the situation that two adjacent workpieces to be sprayed are far from each other may also occur, and different steps need to be executed according to different situations. Referring to fig. 5 in conjunction with fig. 2, fig. 5 is a schematic structural diagram of another embodiment of a spraying production line, in which a controller obtains a first time t₁And a second time t₂Then, whether the interval length delta L between the current workpiece A to be sprayed and the previous workpiece C to be sprayed is larger than or equal to the length D of the first spraying range or not is judged₁To perform different steps for different situations.

Before that, it is further required to first obtain the interval length Δ L between the current workpiece to be sprayed a and the previous workpiece to be sprayed C, specifically referring to fig. 6, fig. 6 is a schematic flow chart of an embodiment of obtaining the interval length between the current workpiece to be sprayed a and the previous workpiece to be sprayed, and the interval length Δ L may be obtained by the following steps:

s401, the controller controls the time relay to start timing from the moment when the induction signal of the last workpiece to be sprayed is stopped being received, and controls the time relay to stop timing at the moment when the induction signal of the current workpiece to be sprayed is received for the first time, so that the time difference between the moment when the last workpiece to be sprayed leaves the sensor and the moment when the current workpiece to be sprayed reaches the sensor is obtained. The time relay may not be the same as the time relay described in step S201, that is, the controller may communicate with a plurality of time relays to control different time relays to perform different functions.

Specifically, referring to fig. 5, the controller controls the time relay (not shown) to start timing from the time when the sensing signal of the previous workpiece to be painted C is stopped being received, and controls the time relay to stop timing at the time when the sensing signal of the current workpiece to be painted a is received for the first time, so as to obtain a time difference Δ t between the time when the previous workpiece to be painted C leaves the sensor 10 and the time when the current workpiece to be painted a reaches the sensor 10. In the process that the last workpiece C to be sprayed passes through the sensor 10, the sensor 10 may continuously receive the sensing signal, when the last workpiece C to be sprayed finishes leaving the sensor 10, the sensor 10 stops receiving the sensing signal, and starts timing from this moment until the time relay stops timing at the moment when the sensing signal of the current workpiece a to be sprayed is received for the first time, so that the time required for the interval length Δ L to pass through the sensor 10, that is, the time difference Δ t, can be obtained.

S402, obtaining the interval length between the current workpiece to be sprayed and the previous workpiece to be sprayed according to the time difference and the movement speed of the current workpiece to be sprayed.

After the time difference delta t between the moment when the last workpiece to be sprayed C leaves the sensor 10 and the moment when the current workpiece to be sprayed A reaches the sensor 10 is obtained, the interval length delta L between the current workpiece to be sprayed A and the last workpiece to be sprayed C is obtained according to the time difference delta t and the movement speed v of the current workpiece to be sprayed A. That is, the interval length Δ L is calculated using the following formula:

ΔL＝Δt*v。

and S104, if so, issuing a task which is related to the current workpiece to be sprayed and starts from the initial moment of receiving the induction signal corresponding to the current workpiece to be sprayed, and controlling the first spray gun to be opened after the first time and to be closed after the second time.

Referring to fig. 5, if the controller determines that the distance Δ L between the current workpiece a to be sprayed and the previous workpiece C to be sprayed is greater than or equal to the length D of the first spraying range₁Then, the first spray gun is controlled to start from the initial moment of receiving the induction signal corresponding to the current workpiece A to be sprayed, which is related to the current workpiece A to be sprayed, and the first spray gun is controlled to be in the first time t₁Then is started and is continuously started for a second time t₂And then the task is closed. That is, when Δ L ≧ D₁In the meantime, the workpiece A to be sprayed and the workpiece C to be sprayed do not simultaneously appear in the first spraying rangeWhen the workpiece C to be sprayed completely leaves the first spraying range and the workpiece a to be sprayed does not enter the first spraying range, the first spray gun 11 may be turned off after the workpiece C to be sprayed finishes spraying, and the first time t corresponding to the workpiece a to be sprayed is waited from the initial time when the sensing signal corresponding to the workpiece a to be sprayed is received₁Then the spray gun is started and kept in the starting state for a second time t₂And spraying the workpiece A to be sprayed at present. The spray gun can be closed when the interval area of two adjacent workpieces to be sprayed passes through the first spraying range, so that ink is saved, and the production cost is reduced. In fig. 5, in order to show two moments required for calculating the interval length Δ L, the workpiece a to be painted is schematically shown to be just sensed by the sensor 10 when the workpiece C to be painted completely leaves the first painting range, in other embodiments, the workpiece a to be painted may be sensed by the sensor 10 but not completely leave the sensor 10, the workpiece a to be painted may be left by the sensor 10 but not enter the first painting range, or the workpiece a to be painted may not reach the sensor 10, which is not illustrated in the figure.

And S105, otherwise, canceling the task of closing the workpiece to be sprayed after the workpiece to be sprayed is continuously opened for the second time, issuing the task which is related to the current workpiece to be sprayed and starts from the initial moment when the sensing signal corresponding to the current workpiece to be sprayed is received, and controlling the first spray gun to be opened after the first time and to be closed after the second time is continuously opened.

Referring to fig. 7, fig. 7 is a schematic structural diagram of another embodiment of a spraying production line. If the controller judges that the interval length delta L between the current workpiece A to be sprayed and the previous workpiece C to be sprayed is less than the length D of the first spraying range₁Then the continuous opening of the last workpiece C to be sprayed is cancelled for a second time t₂Then, the task of closing is issued, the initial time of receiving the induction signal corresponding to the current workpiece A to be sprayed related to the current workpiece A to be sprayed is started, and the first spray gun 11 is controlled at the first time t₁Then is started and is continuously started for a second time t₂After thatAnd (4) closing the task. That is, when Δ L<D₁When the workpiece C to be sprayed does not completely leave the first spraying range, the workpiece a to be sprayed currently enters the first spraying range, and in this case, the first spray gun 11 is not closed but remains in an open state when the workpiece C to be sprayed currently finishes spraying, and the workpiece a to be sprayed currently continues to be sprayed. Before that, when the workpiece a to be sprayed enters the first spraying range, the controller needs to open the first spray gun 11 according to the setting, but at this time, the workpiece C to be sprayed does not completely leave the first spraying range, and the first spray gun 11 is still in an open state, so that the first spray gun 11 does not need to be controlled to be opened or closed, and the original state is directly maintained. Meanwhile, the controller controls the first spray gun 11 to perform the first time t from the initial moment when the induction signal corresponding to the current workpiece A to be sprayed is received₁And a second time t₂And then closing the spraying device to accurately control the spraying time of the current workpiece A to be sprayed and ensure the spraying quality.

According to the embodiment, when the interval length between the adjacent workpieces to be sprayed is greater than the length of the first spraying range, the first spray gun is closed after the second time, so that ink can be saved, and the spraying cost can be reduced; when the spacing length between adjacent workpieces to be sprayed is smaller than the length of the first spraying range, the first spray gun is kept open, and the spraying efficiency can be improved.

Referring to fig. 8, fig. 8 is a schematic structural diagram of another embodiment of a spraying production line. In the present embodiment, in the current operation direction of the workpiece a to be sprayed, the side of the first spray gun 11 away from the sensor 10 is further provided with a second spray gun 12, and the first spraying range of the first spray gun 11 is not overlapped with the second spraying range of the second spray gun 12; after the controller receives the induction signal of the current workpiece A to be sprayed, the method further comprises the following steps: obtaining a third time t required for the workpiece A to be sprayed to move from the sensor 10 to the initial position of the second spraying range₃And a fourth time t required for the workpiece A to be sprayed to completely leave the second spraying range from entering the second spraying range₄。

Some workpieces to be painted may need to be painted by the second spray gun 12 after being painted by the first spray gun 11,the second spray gun 12 is introduced in the embodiment, and the second spraying range of the second spray gun 12 is not overlapped with the first spraying range of the first spray gun 11, so that the first spraying and the second spraying are sequentially carried out without overlapping, and the spraying quality is ensured. In the embodiment, after the controller receives the sensing signal of the current workpiece a to be sprayed, the third time t needs to be obtained₃And a fourth time t₄So that the controller can follow the third time t₃And a fourth time t₄And controlling the spraying process of the workpiece A to be sprayed currently receiving the second spray gun 12.

Referring to fig. 9, fig. 9 is a schematic flow chart illustrating another embodiment of the spraying method of the present application, wherein the controller obtains a third time t₃And a fourth time t₄Then, the method also comprises the following steps:

s501, the controller judges whether the interval length between the current workpiece to be sprayed and the previous workpiece to be sprayed is larger than or equal to the length of the second spraying range.

In the present embodiment, the controller obtains the third time t₃And a fourth time t₄Then, whether the interval length delta L between the current workpiece A to be sprayed and the previous workpiece C to be sprayed is larger than or equal to the length D of the second spraying range or not is judged₂To perform different steps for different situations.

And S502, if yes, issuing a task which is related to the current workpiece to be sprayed and starts from the initial moment of receiving the induction signal corresponding to the current workpiece to be sprayed, controlling the second spray gun to be started after the third time, and continuously starting to be closed after the fourth time.

Referring to fig. 8, if the controller determines that the distance Δ L between the current workpiece a to be sprayed and the previous workpiece C to be sprayed is greater than or equal to the length D of the second spraying range₂Then, the initial time of sending the induction signal related to the current workpiece A to be sprayed and corresponding to the current workpiece A to be sprayed is started from the initial time of receiving the induction signal, and the second spray gun is controlled to be in the third time t₃Then is started and is continuously started for a fourth time t₄And then the task is closed. When Δ L ≧ D₂When the workpiece a to be sprayed and the workpiece C to be sprayed do not simultaneously exist in the second spraying range, and when the workpiece C to be sprayed completely leaves the second spraying range, the workpiece a to be sprayed does not yet enter the second spraying range, the second spray gun 12 may be closed after the workpiece C to be sprayed finishes spraying, and a third time t corresponding to the workpiece a to be sprayed is waited₃Then the spray gun is started and is kept in the starting state for a fourth time t₄And spraying the workpiece A to be sprayed at present. The spray gun can be closed when the interval area of two adjacent workpieces to be sprayed passes through the second spraying range, so that ink is saved, and the production cost is reduced. In other embodiments, the workpiece to be sprayed may enter the second spraying range when the workpiece to be sprayed does not completely leave the first spraying range, but the first spraying range and the second spraying range are not overlapped, so that the spraying method of the present application controls the workpiece to be sprayed to enter the first spraying range and the second spraying range respectively, and the spraying process can be controlled by using the spraying method of the present application no matter whether the same workpiece to be sprayed is in the two spraying ranges at the same time, without affecting the spraying quality.

And S503, otherwise, canceling the task of closing the workpiece to be sprayed after the workpiece to be sprayed is continuously opened for the fourth time, issuing the task of closing the workpiece to be sprayed after the second spray gun is continuously opened for the fourth time, starting from the initial moment when the sensing signal corresponding to the workpiece to be sprayed is received, and controlling the second spray gun to be opened after the third time.

Referring to fig. 8, if the controller determines that the distance Δ L between the current workpiece a to be sprayed and the previous workpiece C to be sprayed is less than the length D of the second spraying range₂Then the continuous opening of the last workpiece C to be sprayed is cancelled for a fourth time t₄Then, the task is closed, the initial time of receiving the induction signal corresponding to the current workpiece A to be sprayed, which is related to the current workpiece A to be sprayed, is issued, and the second spray gun 12 is controlled to be in the third time t₃Then is started and is continuously started for a fourth time t₄And then the task is closed. That is, when ΔL<D₂When the workpiece C to be sprayed does not completely leave the second spraying range, the workpiece a to be sprayed currently enters the second spraying range, and at this time, the second spray gun 12 is not closed but remains in an open state when the workpiece C to be sprayed currently finishes spraying, and the workpiece a to be sprayed currently continues to be sprayed. Before that, when the workpiece a to be sprayed enters the second spraying range, the controller needs to open the second spray gun 12 according to the setting, but at this time, the workpiece C to be sprayed does not completely leave the second spraying range, and the second spray gun 12 is still in an open state, so that the second spray gun 12 does not need to be controlled to be opened or closed, and the original state is directly maintained. Meanwhile, the controller controls the second spray gun 12 to be in a third time t from the initial moment when the induction signal corresponding to the current workpiece A to be sprayed is received₃And a fourth time t₄And then closing the spray gun to accurately control the spray time of the current workpiece A to be sprayed for receiving the second spray gun 12, thereby ensuring the spray quality. Although Δ L ≧ D is schematically drawn in FIG. 8₂However, in the spraying method of the present invention, since the same control method is used for controlling the second spray gun 12 as for controlling the first spray gun 11, Δ L<D₂Reference is made to the above-described embodiment of the first lance 11, which is not illustrated here.

Further, in the present embodiment, a mode of encoding the workpiece to be sprayed may also be adopted to clearly distinguish each workpiece to be sprayed in the spraying bin, and specific encoding modes may refer to the above embodiments, which are not described herein again. After the current workpiece A to be sprayed obtains the code, the controller controls the second spray gun 12 to perform the third time t₃Then is started and is continuously started for a fourth time t₄Then closing, before, the controller can also encode the current workpiece A to be sprayed and the third time t₃A fourth time t₄And performing binding storage. So that the controller can be controlled according to the third time t₃And a fourth time t₄When the spraying process of the second spray gun 12 is controlled, the workpieces to be sprayed can be clearly distinguished.

In other embodiments, it may be necessary to spray the workpiece for a third or more times, so that a third spray gun or more spray guns may be added, which may also be controlled according to the spraying method described in the above embodiments.

Referring to fig. 10, fig. 10 is a schematic structural diagram of an embodiment of a spray coating device according to the present application, in which the spray coating device 100 includes an inductor 101, a time relay 102, a memory 103, and a controller 104 respectively coupled to the inductor 101, the time relay 102, and the memory 103, where the memory 103 stores program instructions, and the controller 104, in cooperation with the inductor 101 and the time relay 102, can run the program instructions to implement the spray coating method according to any one of the above embodiments.

In other embodiments, the spraying apparatus 100 further includes a plurality of spray guns coupled to the controller 104, and a conveyor belt, which can run at a constant speed, on which the workpiece to be sprayed runs at a constant speed. The inductor 101 and the plurality of lances may be located on the same side of the conveyor belt with the inductor 101 being located near the start of the conveyor belt relative to the plurality of lances.

Of course, in order to obtain the actual running speed of the workpiece to be painted more accurately, the painting device 100 may further be provided with a tachometer, and the tachometer is coupled to the controller 104.

The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.