JP2013228149A - Coating drying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a versatile coating drying device capable of efficiently drying a workpiece.SOLUTION: An induction heating source 1 includes a first induction heating part 10 and a second induction heating part 11 which is arranged to face the first induction heating part 10 via a constant velocity joint outer 70. The first induction heating part 10 and the second induction heating part 11 are configured to reciprocate in opposite directions by a moving mechanism 3 comprising electric cylinders 30 and 31.

Description

  The present invention relates to a coating drying apparatus for drying a paint applied to a workpiece, and more particularly to a coating drying apparatus suitable for use in drying a paint applied to an outer part of a constant velocity joint.

  Conventionally, as a workpiece drying device, there is a water-washing wheel drying device described in Japanese Patent Application Laid-Open No. 2009-36389 (Patent Document 1). The drying device includes a first induction heating unit and a second induction heating unit, and the first induction heating unit is disposed to face the first end surface of the wheel, while the second induction heating unit is It arrange | positions so that the 2nd end surface of a wheel may be opposed.

  The relative position of the first induction heating unit with respect to the second induction heating unit is not changed. In this drying apparatus, the first and second induction heating units arranged so as to sandwich the wheel generate eddy currents more uniformly in the wheel, and the wheel is heated with Joule heat resulting from the current, The water on the wheel surface is efficiently evaporated.

JP 2009-36389 A

  However, in the conventional drying apparatus, since the distance between the first induction heating unit and the second induction heating unit is not changed, when the workpieces have various sizes and shapes, all of these various workpieces are used. There is a problem that it cannot be applied and lacks versatility.

  Then, the subject of this invention is providing the coating drying apparatus which can dry a workpiece | work efficiently and is excellent in versatility.

In order to solve the above problems, the paint drying apparatus of the present invention is:
An induction heating source partially arranged around the workpiece coated with paint;
And a moving mechanism for moving the induction heating source relative to and away from the workpiece.

  According to the present invention, an induction heating source is provided, and the workpiece is dried from the inside by induction heating (IH: induction heating). Therefore, even for a workpiece having a large heat capacity, the paint can be efficiently dried. It can be performed.

  Further, according to the present invention, since the moving mechanism for moving the induction heating source relative to the workpiece is provided, the induction heating source is moved to an appropriate position for each workpiece based on the size and shape of the workpiece. Can be used to dry various workpieces. Therefore, the versatility of the paint drying apparatus can be dramatically improved.

In one embodiment,
A blower having a blower opening arranged to face the workpiece;
The induction heating source and the air blowing port are disposed so as to surround the work.

  According to the above embodiment, the induction heating source is partially arranged around the work coated with the paint, and the induction heating source and the air blowing port are arranged so as to surround the work. The wind can collide with the work directly and efficiently. Therefore, since the vapor evaporated from the paint of the workpiece heated by the induction heating source can be efficiently scattered far away from the workpiece by the wind discharged from the blower opening, the vapor pressure of the vapor around the workpiece is reduced. Thus, the evaporation of moisture from the paint of the workpiece can be promoted, and the workpiece can be dried more quickly.

In one embodiment,
Hot air is discharged from the blower opening.

  According to the embodiment, since hot air is discharged from the blower port, the temperature of the workpiece can be increased by the wind from the blower port, and the workpiece can be dried more efficiently.

In one embodiment, the induction heating source is
The first induction heating unit;
A second induction heating unit disposed to face the first induction heating unit with the workpiece interposed therebetween.

  According to the embodiment, since the first induction heating unit and the second induction heating unit that constitute the induction heating source are arranged to face each other via the workpiece, the variation in the amount of heat applied in the direction surrounding the workpiece in the workpiece is suppressed. And the workpiece can be dried more efficiently.

  Moreover, according to the said embodiment, since the 1st induction heating part and the 2nd induction heating part which comprise an induction heating source are opposingly arranged through a workpiece | work, a 1st induction heating part and a 2nd induction heating are used for a workpiece | work. It can be easily moved in the direction perpendicular to the line segment connecting the parts, and the workpiece can be easily conveyed.

In one embodiment,
Equipped with a radiation thermometer to measure the temperature of the workpiece,
The induction heating source and the radiation thermometer are arranged so as to surround the work.

  According to the above embodiment, the induction heating source is partially disposed around the workpiece coated with the paint, and the induction heating source and the radiation thermometer are disposed so as to surround the workpiece. The temperature of the workpiece can be monitored, and the temperature of the workpiece can be prevented from becoming unsuitable for the paint.

In one embodiment,
Control means for controlling the driving of the induction heating source so that the temperature of the paint becomes a predetermined temperature based on a signal from the radiation thermometer.

  The determined temperature may be a single temperature or a temperature range (a temperature range having an upper limit and a lower limit).

  According to the above embodiment, since the driving of the induction heating source can be controlled by the control means so that the temperature of the paint becomes a predetermined temperature, feedback control can be performed. Deterioration occurs and can be controlled to a suitable temperature. Therefore, the appearance quality of the paint of the workpiece can be made excellent.

  ADVANTAGE OF THE INVENTION According to this invention, the coating drying apparatus which can dry a workpiece | work efficiently and is excellent in versatility is realizable.

It is a side view of the coating drying apparatus of one Embodiment of this invention. It is a top view of the said coating drying apparatus. It is a perspective view which shows a 1st induction heating part, a 2nd induction heating part, and a workpiece | work. It is a block diagram of the control apparatus of this coating drying apparatus.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a side view of a paint drying apparatus according to an embodiment of the present invention.

  This paint drying apparatus dries a paint applied to a CVJ outer (outer of a constant velocity joint) (hereinafter simply referred to as a work) 70 as an example of a work. As shown in FIG. 1, this paint drying apparatus includes an induction heating source 1, a rotary table 2, a moving mechanism 3, a blower 4, a radiation thermometer, and a control device as a control means. The heating source 1 includes a first induction heating unit 10 and a second induction heating unit 11.

  As will be described later, each of the first and second induction heating units 10 and 11 has a flat coil, and a magnetic flux is substantially generated only on the front side which is one side in the axial direction of the winding of the flat coil. It has become so. The front side of the first induction heating unit 10 and the front side of the second induction heating unit 11 face each other in one direction.

  The rotary table 2 includes a disk-shaped workpiece mounting table 20 and a motor 21. A workpiece mounting surface 23 of the workpiece mounting table 20 is a circular plane and faces upward in the vertical direction. The workpiece mounting table 20 is present at a position that bisects a line connecting the first induction heating unit 10 and the second induction heating unit 11 substantially vertically. A rotating shaft 24 of a motor 21 is connected to the center of the lower surface of the workpiece mounting table 20. The axial direction of the workpiece mounting table 20 coincides with the axial direction of the rotating shaft 24 of the motor 21. The workpiece mounting table 20 is rotatable by a motor in a direction indicated by an arrow A in FIG.

  The moving mechanism 3 includes a first electric cylinder 30 and a second electric cylinder 31. As shown in FIG. 1, the paint drying apparatus includes an L-shaped first mounting plate 50, and the first mounting plate 50 extends in the horizontal direction and the first plate portion extending in the vertical direction. A second plate portion. The second plate portion extends from the surface on the rear side of the end portion on the lower side in the vertical direction of the first plate portion. The rear surface of the first induction heating unit 10 is fixed to the front surface of the first plate portion of the first mounting plate 50 by bolts 90 and 91. The upper surface of the first electric cylinder 30 is fixed to the surface of the second plate portion on the lower side in the vertical direction. The first electric cylinder 30 is not movable relative to the first induction heating unit 10. The second electric cylinder 31 is also immovable relative to the second induction heating unit 11 via the second mounting plate 51 by the same structure as the first electric cylinder 30.

  The first electric cylinder 30 makes contact with the rotary table 2 while improving the first induction heating unit 10 in the opposite direction of the first and second induction heating units 10 and 11 indicated by an arrow B in FIG. It is designed to move freely. Further, the second electric cylinder 31 improves the second induction heating unit 11 in the opposite direction of the first and second induction heating units 10 and 11 indicated by an arrow C in FIG. To move freely.

  The first and second induction heating units 10 and 11 are connected to each other by the first and second electric cylinders 30 and 31 so that the rotary table 2 is connected to the first and second induction heating units 10 and 11 in the vertical direction. It is designed to move in conjunction so that it is always on the line.

  The blower 4 is made of a well-known blower, and is configured to pump air by a rotary motion of an impeller and discharge it from a blower opening. As shown in FIG. 1, the blower opening of the blower 4 extends in the vertical direction. In this way, the wind can be blown over the entire existence range in the axial direction (extending direction) of the coating region of the workpiece 70 extending in the vertical direction.

  FIG. 2 is a top view of the paint drying apparatus.

  As shown in FIG. 2, the air blowing device 4 includes a first air blowing port 41 and a second air blowing port 42, and the first air blowing port 41 performs second induction heating on the second induction heating unit 11. The second air blowing port 42 is located on one side of the direction perpendicular to the moving direction of the part 11, while the second air blowing port 42 is on the other side of the direction perpendicular to the moving direction of the second induction heating part 11 with respect to the second induction heating part 11 positioned. Each of the first air blowing port 41 and the second air blowing port 42 is directed between the first induction heating unit 10 and the second induction heating unit 11, and is directed to the side surface of the work 70. In this manner, the coating and drying apparatus can remove the vapor evaporated by the wind from the first blower port 41 and the second blower port 42 from the periphery of the work 70. In addition, in this way, the paint drying apparatus dries the workpiece 70 by induction heating of the first and second induction heating units 10 and 11 and the gap between the first induction heating unit 10 and the second induction heating unit 11. The simultaneous drying with the drying of the work 70 by the blowing of the wind from is realized.

  In addition, as shown in FIG. 2, the paint drying apparatus includes a radiation thermometer 5, and the radiation energy measurement direction of the radiation thermometer 5 is between the first induction heating unit 10 and the second induction heating unit 11. Directed to the side of the workpiece 70. As shown in FIG. 2, the first induction heating unit 10, the second induction heating unit 11, the first air blowing port 41, the second air blowing port 42, and the radiation energy measuring unit of the radiation thermometer 5 surround the work 70. As such, they are spaced from each other.

  FIG. 3 is a perspective view showing the first induction heating unit 10, the second induction heating unit 11, and the work 70.

  As shown in FIG. 3, the first induction heating unit 10 is the same as the second induction heating unit 11. The first induction heating unit 10 includes a ferrite core 80 and a flat coil 81 formed of a track-shaped winding. The ferrite core 80 has a bowl-shaped main body portion having a U-shaped cross section and three cylindrical portions, and each cylindrical portion is in the width direction at the bottom of the main body portion (direction perpendicular to the extending direction of the flange). Projecting in the depth direction of the ridge from the substantially central portion of the main body to the opening side of the main body. The three cylindrical portions are located at a distance from each other in the extending direction of the flange. The ferrite core 80 has an E shape when viewed from the outer side in the extending direction of the main body (upward or downward in the vertical direction). The ferrite core 80 is formed of a well-known material capable of forming a ferrite core such as a laminated steel plate.

  The flat coil 81 is wound around the three cylindrical portions so as to surround the three cylindrical portions, is then molded with resin, and is attached to the three cylindrical portions. The tip of the cylindrical part of the first induction heating unit 10 and the tip of the cylindrical part of the second induction heating unit 11 are opposed to the extending direction of the cylindrical part. A workpiece 70 exists between the first induction heating unit 10 and the second induction heating unit 11 so as to be sandwiched between the first induction heating unit 10 and the second induction heating unit 11. Further, the axial direction of the work 70 being dried coincides with the vertical direction.

  The ferrite core 80 covers both side surfaces other than the front side of the flat coil 81 and the rear side so that the magnetic flux is efficiently generated only on the front side, so that the workpiece 70 positioned on the front side of the flat coil 81 is provided. Induction heating that can evaporate the water content of the paint is realized.

  FIG. 4 is a block diagram of the control device 60 of the present paint drying apparatus.

  The control device 60 includes a CPU, and the CPU performs arithmetic processing based on a program stored in advance or a program stored in the future. The control device 60 includes an IH control unit 61, an electric cylinder control unit 62, a blower control unit 63, a table control unit 64, and a timer 65. This paint drying apparatus has an operation unit 8, and the operation unit 8 can set the distance between the rotary table 2 and the first and second induction heating units 10 and 11 and the drying temperature of the paint. Yes.

  Specifically, in this paint drying apparatus, the user uses the operation unit 8 based on the size of the work to dry the paint, and the distance between the rotary table 2 and the first and second induction heating units 10 and 11. Can be entered. Further, when the electric cylinder control unit 62 receives the signal indicating the distance from the operation unit 8, the distance between the rotary table 2 and the first and second induction heating units 10 and 11 is set to the input distance. Thus, the electric cylinders 30 and 31 are driven. In this coating and drying apparatus, the first and second induction heating units 10 and 11 are moved in the front-rear direction in accordance with the workpiece diameter of the workpiece 70 on the rotary table 2 (a plurality of models having different workpiece diameters). It is like that.

  Further, in this paint drying apparatus, when the user inputs the paint drying temperature, the IH power supply control unit 61 that receives the signal representing the temperature from the radiation thermometer 5 causes the paint temperature of the work 70 to be higher than the input temperature. When the temperature is low, power is supplied to the IH power supply 66, while when the temperature of the paint of the work 70 is equal to or higher than the input temperature, power is not supplied to the IH power supply 66. In this way, automatic control based on feedback is performed so that the temperature of the paint on the workpiece 70 is maintained at the input temperature. In this way, the paint drying apparatus makes the appearance quality of the paint good by accurately monitoring the paint temperature.

  In the paint drying apparatus, the user can input the drying time. The table control unit 64 drives the table motor 67 when the drying of the coating starts, and stops the table motor 67 when the measurement by the timer 65 reaches the input drying time. It has become. In this way, by rotating the work 70, the paint applied to the outer peripheral surface of the work 70 is efficiently dried regardless of the phase of the position of the outer peripheral surface of the work 70. The blower control unit 63 drives the blower 4 when the drying of the paint starts. On the other hand, when the measurement by the timer 65 reaches the input drying time, the blower 4 is stopped. It is like that.

  According to the above embodiment, since the work 70 as an example of the work is dried from the inside by the induction heating source 1 and induction heating (IH: induction heating), the work 70 having a large heat capacity is used. However, the paint can be efficiently dried.

  Moreover, according to the said embodiment, since the moving mechanism 3 which contacts / separates the induction heating source 1 relatively with respect to the workpiece | work 70 is provided, the induction heating source 1 is modeled on the workpiece | work 70 based on the magnitude | size and shape of the workpiece | work 70. Each can be moved to an appropriate position and can be used for drying various workpieces 70. Therefore, the versatility of the paint drying apparatus can be dramatically improved.

  Moreover, according to the said embodiment, the induction heating source 1 is partially arrange | positioned around the workpiece | work 70 with which the coating material was coated, and the induction heating source 1 and the ventilation openings 41 and 42 surround the circumference | surroundings of the workpiece | work 70. Therefore, the wind from the air blowing ports 41 and 42 can be directly and efficiently blown to the work 70. Accordingly, the vapor evaporated from the paint of the work 70 heated by the induction heating source 1 can be efficiently scattered far away from the work 70 by the wind discharged from the air blowing ports 41 and 42. The vapor pressure of the vapor can be lowered, the evaporation of moisture from the paint of the workpiece 70 can be promoted, and the workpiece 70 can be dried more quickly.

  Moreover, according to the said embodiment, since the 1st induction heating part 10 and the 2nd induction heating part 11 which comprise the induction heating source 1 are opposingly arranged via the workpiece | work 70, the direction which surrounds the workpiece | work 70 in the workpiece | work 70. Variation in the amount of heat applied can be suppressed, and the workpiece 70 can be dried more efficiently.

  Moreover, according to the said embodiment, since the 1st induction heating part 10 and the 2nd induction heating part 11 which comprise the induction heating source 1 are opposingly arranged via the workpiece | work 70, the workpiece | work 70 is made into the 1st induction heating part. 10 and the second induction heating unit 11 can be easily moved in the direction perpendicular to the line segment, and the workpiece 70 can be easily conveyed.

  Moreover, according to the said embodiment, the induction heating source 1 is partially arrange | positioned around the workpiece | work 70 with which the coating material was coated, and the induction heating source 1 and the radiation thermometer 5 surround the circumference | surroundings of the workpiece | work 70. Therefore, the temperature of the work 70 can be monitored, and the temperature of the work 70 can be prevented from becoming unsuitable for the paint.

  Moreover, according to the said embodiment, the drive of the induction heating source 1 can be controlled by the control apparatus 60 so that the temperature of a coating material may become predetermined temperature based on the signal from the radiation thermometer 5, and feedback is carried out. Control can be performed. Accordingly, the coating temperature can be controlled to a suitable temperature due to the deterioration of the coating, and the appearance quality of the paint on the workpiece 70 can be made excellent.

  As mentioned above, according to the said embodiment, since it can dry with the wind from between the 1st induction heating part 10 and the 2nd induction heating part 11, drying by induction heating and drying by blowing of a wind are performed simultaneously. And the synergistic effect can drastically shorten the drying time. Moreover, since the 1st induction heating part 10 and the 2nd induction heating part 11 are movable and can change an air air gap distance, even if the workpiece diameter of the workpiece | work 70 which is a workpiece | work changes, a workpiece | work, 1st and 2nd The distance with the induction heating parts 10 and 11 can be made comparable, and the versatility of an apparatus can be improved.

  In the above embodiment, the first induction heating unit 10 and the second induction heating unit 11 move in conjunction with each other, and the rotary table 2 includes the first induction heating unit 10 and the second induction heating unit 11. However, in the present invention, the rotary table has a vertical two-segment line connecting the first induction heating unit and the second induction heating unit. A configuration that does not always exist on the equipartition line may be used.

  Moreover, in the said embodiment, the 1st induction heating part 10 and the 2nd induction heating part 11 are arrange | positioned so that it may mutually have a 180 degree phase difference in the circumferential direction of the turntable 2 so that the turntable 2 may be pinched | interposed. However, in this invention, you may arrange | position a 1st induction heating part and a 2nd induction heating part so that it may have a phase difference other than 180 degree | times in the circumferential direction of a rotary table mutually.

  Moreover, in the said embodiment, although the induction heating source 1 consisted of the 1st induction heating part 10 and the 2nd induction heating part 11 which are located mutually spaced apart, in this invention, an induction heating source is one May be composed of only one induction heating section, or may be composed of three or more induction heating sections that are spaced from each other.

  In the above embodiment, the two air vents 41 and 42 are spaced from each other. However, in the present invention, only one air vent may be provided, and the air vents are spaced apart from each other. You may have three or more air outlets located in the middle.

  Moreover, although the said embodiment had the radiation thermometer 5, this invention does not need to have a radiation thermometer.

  Moreover, although the said embodiment had the air blower 4, this invention does not need to have an air blower.

  Moreover, in the said embodiment, although the wind of the temperature substantially the same as external temperature was discharged from the ventilation openings 41 and 42, in this invention, a heater etc. are provided in the downstream of the flow of the wind from an impeller. The hot air can be blown out from one or more existing air outlets, and the work can be dried more efficiently. .

  Moreover, in the said embodiment, although the 1st induction heating part 10 and the 2nd induction heating part 11 were movable with the electric cylinders 30 and 31, in this invention, an induction heating source is an air cylinder, It may be movable by a known mechanism other than an electric cylinder such as a hydraulic cylinder.

  Moreover, in the said embodiment, each induction heating part 10 and 11 had the integral type ferrite core 80, However, In this invention, the ferrite of the at least 1 induction heating part of one or more induction heating parts is provided. The core may be formed by placing a plurality of ferrite cores in the vertical direction (corresponding to the normal direction of the U-shaped end face of each ferrite core). For example, if the ferrite core shown in FIG. 3 has three cylindrical portions, three E-type ferrite cores having only one cylindrical portion may be stacked in the vertical direction. Two E-type ferrite cores on one side and two E-type ferrite cores having only one cylindrical portion may be stacked in the vertical direction.

  Moreover, in the said embodiment, although the ferrite core 80 of each induction heating part 10 and 11 had three cylindrical parts, in this invention, at least 1 induction heating part of one or more induction heating parts is provided. The ferrite core may have 1, 2 or 4 or more cylindrical portions. In this case, for example, by stacking 1, 2 or 4 or more E-shaped ferrite cores having only one cylindrical portion in the vertical direction (corresponding to the normal direction of the U-shaped end face of each ferrite core) Ferrite cores with one, two, or four or more cylindrical parts can be created, but in this way, a ferrite core can be easily formed that can efficiently raise the temperature and reduce energy loss according to the size of the workpiece. It is possible and preferable.

  Moreover, in the said embodiment, as a method of arrange | positioning a workpiece | work in predetermined positions, such as a position which bisects the line segment which tied the 1st induction heating part and the 2nd induction heating part, a workpiece | work is mounted. There is a method in which a rotary table to be placed is movable by an advancing and retreating mechanism such as an electric cylinder, and the rotary table on which a workpiece is placed is moved to a predetermined position.

  In addition, a drying process such as a painting process is performed on a rotary table that is immovably fixed to a predetermined position such as a position that bisects a line segment connecting the first induction heating section and the second induction heating section. Is a position where the work is completed after another process is tightened and fixed to the chuck body with a nail or a collet, and then the work is divided into two equal segments connecting the first induction heating section and the second induction heating section, etc. There is a method in which the workpiece is placed on a rotary table fixed so as not to move at a predetermined position, and then the workpiece is released from the claw or collet.

  In addition, there is a method in which a work placed on a belt facing upward in the vertical direction is arranged at a predetermined position by moving the belt. In addition, the work is placed by a person on a rotary table that is fixed to a predetermined position such as a position where the line segment connecting the first induction heating unit and the second induction heating unit is bisected. There is a way to do it.

  In the above embodiment, the temperature that can be input may be a single temperature or a temperature range (a temperature region having an upper limit and a lower limit).

  In the above embodiment, the part where the eddy current flows is the outer part of the metal constant velocity joint in the above embodiment. However, in this invention, the part where the eddy current flows is made of a conductive material such as metal. Any product can be used as long as it is not limited to the outer of the constant velocity joint.

DESCRIPTION OF SYMBOLS 1 Induction heating source 3 Movement mechanism 4 Air blower 10 1st induction heating part 11 2nd induction heating part 30 1st electric cylinder 31 2nd electric cylinder 41 1st air outlet 42 2nd air outlet 60 Control apparatus 70 Workpiece | work

Claims (6)

An induction heating source partially arranged around the workpiece coated with paint;
A paint drying apparatus comprising: a moving mechanism for moving the induction heating source relative to and away from the workpiece. In the paint drying apparatus according to claim 1,
A blower having a blower opening arranged to face the workpiece;
The coating drying apparatus, wherein the induction heating source and the air blowing port are disposed so as to surround the work. In the paint drying apparatus according to claim 2,
A coating drying apparatus, wherein hot air is discharged from the blower opening. In the coating drying apparatus according to any one of claims 1 to 3,
The induction heating source is
The first induction heating unit;
A coating drying apparatus comprising: a second induction heating unit disposed to face the first induction heating unit via the workpiece. In the paint drying apparatus according to any one of claims 1 to 4,
Equipped with a radiation thermometer to measure the temperature of the workpiece,
The coating drying apparatus, wherein the induction heating source and the radiation thermometer are arranged so as to surround the work. In the paint drying apparatus according to claim 5,
A paint drying apparatus comprising: control means for controlling driving of the induction heating source so that the temperature of the paint becomes a predetermined temperature based on a signal from the radiation thermometer.

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