JP2004315837A - Treatment system for workpiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a treatment system for a workpiece where the remaining foreign matters stuck to a workpiece are positively removed while suppressing the upsizing and complication of equipment, so that the quality of the workpiece and in turn, a product after the treatment can be improved. <P>SOLUTION: A degreasing tank 11 stored with a prescribed solution is provided correspondingly to a degreasing stage. The upper direction of the degreasing tank 11 is equipped with a moving apparatus 17 as a moving means freely movably. The moving apparatus 17 is constituted in such a manner that an automobile body W is dipped into the degreasing tank 11, is taken-up after a prescribed time, and is thereafter carried to the following stage. Further, the moving apparatus 17 is constituted so as to perform swinging operation as to the automobile body W during the dipping period of the automobile body W into the degreasing tank 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a processing system for a workpiece, and more particularly to a processing system that includes performing pretreatment by immersing an automobile body in various liquids when painting the automobile body.
[0002]
[Prior art]
When a work such as an automobile body is painted, various pretreatment steps are required. For example, an automobile body that has undergone a body assembly process undergoes a degreasing process, a surface conditioning process, a film forming process, a washing process, a drying process, an electrodeposition process (undercoating process), and the like.
[0003]
Most of the above steps, except for the drying step, are performed by immersing the automobile body in a tank storing a predetermined liquid for a predetermined time.
[0004]
When the automobile body is subjected to each of these processing steps, any of a slipper dipping method and a batch method is adopted. In the slipper dip method, a plurality of boat-shaped tanks are used. The entrance and exit of each tank are inclined, and the vehicle body is subjected to each process while being continuously conveyed by a conveyor. That is, in the slipper dip method, the automobile body is moved during the immersion period while being immersed in the tank. On the other hand, in the batch method, moving devices are installed corresponding to a plurality of tanks. In this moving device, an automobile body is immersed in each tank in a suspended state, and after a predetermined time, the automobile body is pulled up and moved to the next place.
[0005]
Conventionally, in order to remove foreign matters such as iron powder and polishing dust remaining on a work such as an automobile body before a coating process, a water washing process (or a process similar thereto) of the above-described various processing processes is performed. There is a technique of spraying cleaning water toward a work (for example, see Patent Document 1).
[0006]
[Patent Document 1]
Japanese Patent No. 2675423
[Problems to be solved by the invention]
However, in the above-described cleaning method, cleaning unevenness often occurs in each part of the work, and there is a possibility that foreign matter is not removed even during the coating process. On the other hand, it is conceivable to provide a plurality of devices dedicated to the water washing step, or to provide a movable spray nozzle for spraying the work from various angles and washing the work in detail. However, in this case, a large installation space may be required, and the size and complexity of the apparatus for the washing step may be increased. As a result, not only the work processing system becomes large, but also the work efficiency decreases.
[0008]
Therefore, in the present invention, by suppressing the enlargement and complication of the equipment, and by more positively removing foreign substances adhering to and remaining on the work, the quality of the work and, consequently, the quality of the product after processing can be improved. A technical problem is to provide a processing system for a work that can be performed.
[0009]
Means for Solving the Problems and Effects of the Invention
Hereinafter, each means suitable for solving the above-mentioned problems and the like will be described in terms of items. In addition, an operation and effect specific to the corresponding means will be added as necessary.
[0010]
Means 1. Processing of a work including a tank in which a liquid is stored, and a moving means for immersing the work in the tank, lifting the work after a predetermined time, and thereafter moving the work to be transported to the next location. A system for processing a work, wherein the moving means performs a rocking operation on the work during a period during which the work is immersed in the tank.
[0011]
According to the first aspect, by shaking the work in the liquid, the foreign matter adhering to and remaining on the work is rubbed by the liquid, and a relatively large external force is applied to the foreign matter from the liquid. In other words, the foreign matter can be positively peeled off from the workpiece by the external force and removed. Also, if the workpiece is shaken while completely immersed in the liquid, an external force is applied to the entire workpiece (especially not only on the convex surface but also on the concave surface of the workpiece). Even the remaining foreign matter can be removed from the work and removed.
[0012]
As described above, it is possible to effectively remove foreign matter from the work while adopting a relatively simple configuration. As a result, it is possible to improve the quality of the workpiece, and furthermore, the quality of the processed product (for example, a painted product), and to save the space, simplify, and reduce the cost of the system.
[0013]
Note that the shaking operation may be performed for a predetermined time or a predetermined number of times. In addition, the term “removing operation” may be referred to as “repeating operation” (hereinafter, the same applies to each means).
[0014]
Means 2. At least degreasing, film formation, water washing, a plurality of tanks in which respective liquids for performing electrodeposition are stored, and a work is immersed in a predetermined tank, the work is pulled up after a predetermined time, and then the next place is A moving means for moving the work to be transported to the work, wherein the moving means performs a rocking operation on the work during a period of dipping the work in the tank. A processing system for a workpiece, wherein the processing system is configured.
[0015]
According to the means 2, by shaking the work in the liquid, the foreign matter adhering to and remaining on the work is rubbed into the liquid, and a relatively large external force is applied to the foreign matter from the liquid. In other words, the foreign matter can be positively peeled off from the workpiece by the external force and removed. Also, if the workpiece is shaken while completely immersed in the liquid, an external force is applied to the entire workpiece (especially not only on the convex surface but also on the concave surface of the workpiece). Even the remaining foreign matter can be removed from the work and removed.
[0016]
In addition, when the above-described configuration is employed in a plurality of tanks among the tanks provided for performing degreasing, film formation, washing, and electrodeposition, the above-described effects become more remarkable. That is, in the plurality of tanks, the washing (the wiping operation) is performed in multiple stages, so that, for example, a complicated configuration such as setting a plurality of washing steps only for washing the work is not required. Foreign matter can be removed from the work with a relatively simple configuration. As a result, it is possible to further improve the quality of the work (particularly, the coating film), and to save the space and simplify the system.
[0017]
Means 3. 3. The work processing system according to claim 1, wherein the moving unit is configured to move the work in a direction other than the rocking operation during the immersion period.
[0018]
According to the means 3, since the work in the immersion state is moved in a direction other than the rocking operation, the work is once separated from the work by the rocking operation, and the foreign matter existing near the work can be separated from the work. As a result, it is possible to suppress the possibility that foreign matter is deposited on the work again.
[0019]
In addition, when the immersed work is configured to be transported in an oblique direction or moved with complicated movement, a complicated flow occurs around the work, and the flow acts on the work. Will be done. That is, the work in the immersion state is rubbed into the water flow from various angles including the immersion direction (for example, the vertical direction) of the work. For this reason, even if there is a portion such as a concave portion where foreign matter relatively easily accumulates on the work, the foreign matter can be separated from the portion.
[0020]
Note that the moving means may be configured to temporarily separate the work from the liquid during the immersion period and then immerse the work again. When such a configuration is adopted, the above effect can be further remarkable. However, when the above configuration is adopted for the electrodeposition described in the means 2, the work is shaken only in the liquid due to the property of the electrodeposition process of performing the electrodeposition coating while immersing the work in the liquid. .
[0021]
Furthermore, the moving means may be configured to perform the shaking operation in a state where the work is separated from the liquid. In that case, foreign substances contained in the liquid attached to the surface of the work can be shaken off together with the liquid and removed.
[0022]
Means 4. 4. The work processing system according to claim 1, wherein the tank includes a water flow device for causing a water flow in a certain direction in the tank.
[0023]
According to the means (4), it is possible to effectively remove the foreign matter that has been separated in the rocking operation and remains in the liquid from the vicinity of the workpiece by the water flow. Therefore, it is possible to suppress a situation in which a foreign substance separated from the work adheres to the work again.
[0024]
In addition, it is more desirable to provide a liquid purifying unit for removing foreign matter in the above configuration. For example, the tank is a liquid ejecting unit that ejects the liquid toward the inside of the tank so as to generate a water flow by directing the liquid stored in the tank in a predetermined direction, and the amount of the liquid ejected by the liquid ejecting unit. Liquid discharging means for discharging substantially the same amount of liquid, a circulation path provided to communicate the liquid ejection means and the liquid discharging means, and a purifying means disposed in the middle of the circulation path. The liquid discharged from the liquid discharging means may be ejected from the liquid ejecting means while being purified via the purification means in the middle of the circulation path. When such a configuration is adopted, the liquid can be kept in a relatively clean state (a state that does not include or relatively does not include foreign matter), and a separated foreign matter adheres to the work again in a shaking operation or the like. The situation can be suppressed more effectively.
[0025]
Means 5. The work processing system according to any one of means 1 to 4, wherein a bottom surface of the tank corresponding to a location where the rocking operation is performed in the tank is formed deeper than other bottom surfaces.
[0026]
According to the means 5, it is possible to suppress the amount of liquid used while securing a space for sufficiently performing the shaking operation of the work.
[0027]
Means 6. The work processing system according to any one of claims 1 to 5, further comprising control means for controlling the moving means based on a preset program.
[0028]
According to the means 6, the moving means is controlled by the control means based on a preset program. Therefore, the most efficient work can be automatically performed in a series of processes. As a result, the processing time can be reduced.
[0029]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment will be described with reference to the drawings.
[0030]
FIG. 1 is a schematic side view showing a schematic configuration in a degreasing step of a “vehicle body pre-processing system” as a work processing system.
[0031]
As shown in FIG. 1, a degreasing tank 11 in which a predetermined solution is stored is provided in order to remove oils and fats on the surface of the automobile body after the assembly process. In addition, a moving rail (not shown) is provided above the degreasing tank 11 so as to face the degreasing tank 11 (in the left-right direction in FIG. 1). The moving device 17 is movably equipped.
[0032]
The moving device 17 includes a main body 18, a lift 19 provided on the main body 18, and a pedestal rotatably provided at a distal end of the lift 19 from a horizontal position to a vertical position. Unit 20. The lift section 19 has a multilayer structure, and is configured to be extendable and contractible by a drive mechanism (not shown) in the main body section 18. In the present embodiment, the length of the lift section 19 is set to be adjusted appropriately so as to maintain the vehicle body W in a predetermined suspended state. The pedestal portion 20 has a locking mechanism (not shown), and the automobile body W can be moved while being held on the pedestal portion 20 by the locking mechanism.
[0033]
The drive mechanism is not particularly limited, but for example, a motor or a hydraulic cylinder can be used. Also, the configuration of the lift unit 19 is not particularly limited to the multilayer structure, and for example, a single column or chain may be configured to be vertically movable.
[0034]
Although not shown, the system includes a control device for controlling the operation of the moving device 17. The control device controls the moving device 17 based on a predetermined program.
[0035]
Next, the operation and effect of the present embodiment configured as described above will be described.
[0036]
When the vehicle body W is transferred to a position above the degreasing tank 11 in a horizontal state by the moving device 17, the vehicle body W is similarly rotated to a position in the vertical direction by the moving device 17, and is vertically moved into the degreasing tank 11. To be completely immersed (state S1 in FIG. 1). The immersed automobile body W is first shaken up and down a predetermined number of times. After being shaken a predetermined number of times, the vehicle body W is transported obliquely upward until the vehicle body W is located at a substantially middle point of the degreasing layer 11 and at a position where the vehicle body W is separated from the solution (state S2 in FIG. 1). Then, after temporarily stopping the vehicle body W at the approximate middle point as the top, the vehicle body W is moved up and down a predetermined number of times again. After being shaken a predetermined number of times, the vehicle body W is transferred obliquely downward so as to be completely immersed again in the solution. The vehicle body W (state S3 in FIG. 1) immersed again is shaken up and down again a predetermined number of times, shaken a predetermined number of times, and then pulled up in the vertical direction. In the present embodiment, such an operation is repeatedly performed a plurality of times. Then, the vehicle body W lifted up in the vertical state is rotated by the moving device 17 to a position where the vehicle body W becomes a horizontal state, and is transported in a horizontal direction so as to undergo a next step (surface adjustment step).
[0037]
As described above in detail, in the present embodiment, when the degreasing operation is performed, the moving device 17 performs an operation of moving the vehicle body W up and down. By shaking the vehicle body W in the solution in this way, the foreign matter adhering to and remaining on the vehicle body W is rubbed into the solution, and a relatively large external force is applied to the foreign matter. That is, it is possible to positively peel off and remove foreign matters such as iron powder and polishing dust remaining on the vehicle body W from the vehicle body W.
[0038]
Further, when the vehicle body W is shaken in a state of being completely immersed in the solution, an external force is applied to the entire vehicle body W (particularly not only the convex surface of the vehicle body W but also the concave surface of the vehicle body W). In addition, foreign matters adhering and remaining on portions that are difficult to reach by conventional cleaning can be peeled off from the automobile body W and removed.
[0039]
As described above, it is possible to effectively remove foreign matter from the vehicle body W while adopting a relatively simple configuration. As a result, space saving, simplification, cost reduction, and the like of the system can be achieved, and the quality of the vehicle body W and, subsequently, the quality of the painted product can be improved.
[0040]
In addition, the moving device 17 performs the work of shaking the vehicle body W immediately after the vehicle body W is separated from the solution. Therefore, foreign substances contained in the solution attached to the surface of the automobile body W can be shaken off together with the solution and removed.
[0041]
Further, in the present embodiment, the automobile body W in the immersion state is moved in the solution in a direction different from the shaking direction. For this reason, it is possible to separate from the vehicle body W at the time of the shaking operation and to separate the foreign matter present in the vicinity of the vehicle body W from the vehicle body W. As a result, it is possible to suppress the possibility that foreign matter is deposited on the vehicle body W again.
[0042]
In particular, in the present embodiment, the vehicle body W is not simply moved in the vertical or horizontal direction, but is moved in an oblique direction. Therefore, a complicated water flow of the solution is generated around the vehicle body W, and the water flow hits the vehicle body W. That is, the immersed vehicle body W is rubbed into the water flow from various angles, including the immersion direction (vertical direction) of the vehicle body W. That is, the foreign matter can be separated from the portion, such as the concave portion, where the foreign matter is relatively easily deposited.
[0043]
At the same time, the foreign body can be more effectively separated from the vehicle body W by raising the immersed vehicle body W in the middle of the degreasing step.
[0044]
As described above, by adopting a configuration for cleaning the automobile body W also in the degreasing step, for example, a complicated configuration such as setting a plurality of water washing steps only for cleaning the automobile body W is not required, and the configuration can be simplified. With such a configuration, foreign matter can be effectively removed from the automobile body W.
[0045]
Further, since the treatment is performed by immersing the automobile body W, the equipment such as a slipper dipping method does not need to be enlarged. In other words, the processing space can be made as compact as the batch system.
[0046]
Furthermore, at the time of the first immersion and the last removal of the vehicle body W, the vehicle body W is in a vertical state. Therefore, it is not necessary to make the entrance of the degreasing tank 11 a tapered surface, and in this sense, further space saving can be achieved, and as a result, the space saving of the system can be achieved.
[0047]
In the present embodiment, the degreasing step has been described. However, the above configuration and the effects based on the above configuration are not particularly exhibited only in the degreasing step, and the vehicle is placed in a tank for storing a predetermined solution. The above-described configuration may be adopted as long as the process is a process of immersing the body W, and an effect based on the above-described configuration may be obtained. For example, the above configuration may be adopted in the surface adjustment step, the film formation step, the water washing step, and the electrodeposition step (undercoating step). Needless to say, a plurality of steps adopting the above configuration may be present (or may be configured in combination), and in that case, the above effects can be made more remarkable. However, when the above configuration is adopted in the electrodeposition process, the vehicle body W or a part thereof is subjected to a predetermined process due to the nature of the electrodeposition process of performing the electrodeposition coating while immersing the vehicle body W in a predetermined solution. The structure in which the vehicle body W is shaken only in the solution is not employed, and the structure in which the vehicle body W is pulled out of the solution is not employed.
[0048]
Note that the present invention is not limited to the content described in the above embodiment, and may be implemented as follows, for example. Of course, other application examples and modifications not illustrated below are naturally possible.
[0049]
(A) In the above-described embodiment, the vehicle body W is suspended from the moving device 17 and is configured to be moved up and down (shaken) in the degreasing process. However, the configuration is particularly limited to such a configuration. Not something. For example, a vertically movable platform is provided on a predetermined bottom surface in the degreasing tank 11 so that the vehicle body W is immersed so as to ride on the platform, and the vehicle body W is shaken by the vertical movement of the platform. It may be done.
[0050]
(B) In the above-described embodiment, a water flow device that generates a water flow in a direction opposite to the traveling direction may be provided in the degreasing tank 11. Further, the degreasing tank 11 may be provided with a purifying mechanism for removing foreign substances in the stored predetermined solution.
[0051]
For example, as shown in FIG. 2, the solution is ejected from the degreasing tank 11 into the degreasing tank 11 by a pump (not shown) in order to cause a water flow to the solution stored in the degreasing tank 11. A spout 21, a discharge port 22 for discharging a solution of substantially the same amount as the amount of the solution spouted by the spout 21, a circulation path 23 provided to communicate the spout 21 with the discharge port 22, A purifying filter 24 disposed in the middle of the circulation path 23, and the solution discharged from the discharge port 22 passes through the circulation path 23 while being purified through the purification filter 24 in the middle of the jet port 21. It may be ejected from. When such a configuration is adopted, the solution can be kept in a relatively clean state (a state that does not include or relatively does not contain foreign matter), and the foreign matter removed by the shaking operation or the like adheres to the automobile body again. Such a situation can be more effectively suppressed. The water flow device and the purification mechanism are not particularly limited, and various configurations can be adopted.
[0052]
(C) The shape of the degreasing tank 11 is not particularly limited. For example, as shown in FIG. 3, the bottom surface of the degreasing tank 11 corresponding to the location where the shaking operation is performed in the degreasing tank 11 may be configured to be deeper than the bottom surfaces of the other degreasing tanks 11. By adopting such a configuration, the amount of liquid used can be suppressed while securing a space for sufficiently performing the shaking operation of the vehicle body W.
[0053]
(D) In the above embodiment, the vehicle body W is configured to be shaken up and down a predetermined number of times. However, the direction, number of times, and time of shaking are not particularly limited. For example, it may be configured to be swung back and forth or left and right with respect to the traveling direction, or may be configured to be swung so as to draw a circle. If necessary, the moving device 17 which is a device for shaking the automobile body W may be configured to be movable left and right with respect to the traveling direction, or the lift 19 may be configured to be bendable. Good.
[0054]
(E) In the above embodiment, the configuration is such that the vehicle body W is appropriately rotated, but the configuration is not particularly limited to this. For example, the vehicle body W may be configured to maintain a horizontal state during the immersion period.
[0055]
(F) In the above embodiment, the body to be processed is exemplified by the automobile body W. However, the present invention may be applied to a case where another work is processed.
[Brief description of the drawings]
FIG. 1 is a schematic side view showing a schematic configuration in a degreasing step of a pretreatment system for an automobile body in one embodiment.
FIG. 2 is a schematic side view showing a configuration of a tank in another embodiment.
FIG. 3 is a schematic side view showing a configuration of a tank in another embodiment.
[Explanation of symbols]
11: Degreasing tank, 17: Moving device as moving means, 18: Main body, 19: Lifting unit, 20: Pedestal, W: Automobile body as work.

Claims (4)

A tank for storing liquid;
A work processing system comprising: a moving unit configured to immerse a work in the tank, lift the work after a predetermined time, and then move the work to be conveyed to a next location.
The work processing system according to claim 1, wherein the moving unit performs a shaking operation on the work during a period in which the work is immersed in the tank. At least degreasing, film formation, water washing, a plurality of tanks in which each liquid for performing electrodeposition,
A work processing system, comprising: a moving means for immersing a work in a predetermined tank, lifting the work after a predetermined time, and then moving the work to be conveyed to a next location.
The work processing system according to claim 1, wherein the moving unit performs a shaking operation on the work during a period in which the work is immersed in the tank. The work processing system according to claim 1, wherein the moving unit is configured to transfer the work in a direction other than the rocking operation during the immersion period. The work processing system according to any one of claims 1 to 3, wherein the tank includes a water flow device that causes a water flow in a certain direction in the tank.

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