JPS59213266A - Powder painting processor of rotor of motor - Google Patents

Abstract

PURPOSE:To prevent paint from adhering to a shaft during the process by composing of a holder having a receiving hole, to which one of a rotor shaft is inserted, and a piston having a holding hole opposed to the receiving hole for varying the interval of both holes, and externally applying high pressure in the state that the shaft is held in both holes. CONSTITUTION:A holder 3 having a receiving hole 3b, to which one of shafts 2a, 2b projected from both sides of a rotor 2 is inserted, and a cylinder 4 provided therein with a piston 6 having a holding hole 6b for varying the interval to the hole 3b are provided. Air is fed from an air source in the state that the shafts 2a, 2b are held in the holes 3b, 6b, and both holes are increased in pressure higher than the exterior. In this manner, it can completely prevent the powder paint from being adhered to the shaft portion, thereby omitting the cleaning step of the shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for powder coating a motor rotor, which can perform powder coating treatment while keeping the shaft in a clean state.

The conventional powder coating process for rotors involves placing rubber caps on the shafts protruding from both sides of the rotor, heating the rotor, and then immersing it in an atmosphere in which the powder coating is suspended. Sprinkle with and fuse. Finally, when the rubber gap was removed, the shaft part was masked by the rubber cap, so
You should be able to get a rotor that is not painted, but has all other parts painted. However, even if masked with a rubber cap, it is difficult to completely maintain the adhesion between the rubber cap and the shaft, and the powder paint will enter the rubber cap and fuse inside, so it is difficult to completely maintain the adhesion between the rubber cap and the shaft. After removing it, it was necessary to perform a cleaning process on the shaft, which was extremely troublesome. Furthermore,
A polished round bar is used as the material for the rotor shaft, but its surface becomes rough after cleaning.
There was also the drawback that the conditions as a rotating shaft deteriorated.

Furthermore, if you do not cover the rubber cap at all, the paint film will be strong and extremely difficult to remove, so the masking process of covering the rubber cap cannot be omitted, and this masking process is difficult to automate, so it must be done manually. This was a major impediment to improving efficiency.

In view of the shortcomings of the prior art, the present invention completely prevents powder paint from adhering to the shaft portion without applying a rubber cap to the rotor, and thereby eliminates the cleaning step after powder coating treatment. To provide a powder coating processing device for a rotor of a motor, which takes advantage of the precision of the material without roughening the surface of the shaft.

Hereinafter, the present invention will be explained with reference to illustrated embodiments.

In the drawings, 1 indicates a manipulator 1a and an arm 1b.
2 is a rotor having shafts 2a and 2b; 3 is movably held in a main body (not shown); a holder having a receiving portion 3a and a receiving hole 3b; 4 is held in this holder 3; Cylinder, 5 is the air supply nozzle of the cylinder 4, 6 is the holding part 6a, the holding hole 6b, the orifice 6
c, and is given the ability to rise within the cylinder 4 by a spring 7.

Next, the operation will be explained.

In the drawing, a robot 1 grips a preheated shaft 1a of a rotor 1 before painting with a manipulator 1a,
A state in which the shaft 2b is inserted into the receiving hole 3b is shown.

From the illustrated state, the robot 1 then releases the shaft 1a and operates the arm 1a to retract the manipulator 1a from the rotor 2. This receiving hole 3b is constantly supplied with air from an air supply source (not shown), and the atmospheric pressure within the receiving hole 3b is increased by inserting the shaft 2b.

After the manipulator 1a retreats, air is sent from the air nozzle 5, and the piston 6 is lowered against the spring 7, and the holding hole 6b covers the shaft 2a and holds it. Since the shaft 2a penetrates through the hole 6b, air is blown out from the holding hole 6b while the piston 6 is moving downward, and after the shaft 2a is held, the air pressure inside the holding hole 6b is increased.

Since the receiving hole 3b is constantly supplied with air, the shaft 2b
When the rotor 2 is first inserted, air is supplied to the extent that it does not blow away the rotor 2. However, due to the piston 6, the shaft 2a
There is no risk of blowing out the rotor 2 after it is held, so if necessary, once the piston 6 has descended by a predetermined amount and held the shaft 2a, the air pressure in the receiving hole 3b can be further increased. However, this may be selected arbitrarily based on the design.

After the rotor 2 is held by the receiving hole 3b and the holding hole 6b, the holder 3 immerses the rotor 2 in the powder coating atmosphere while maintaining this state, so that the powder coating that has come into contact with the rotor 2 is fused as it is. be painted. However, since the shafts 2a and 2b are located within the holding hole 6b and the receiving hole 3b and have a pressure difference, the powder coating cannot enter, and therefore, is not coated.

After a predetermined period of time, the holder 3 removes the rotor 2 from the powder coating atmosphere, positions the rotor 2 within the operating range of the arm 1a of the robot 1, and then exhausts the cylinder 4, causing the piston 6 to rise by the spring 7. Then, the shaft 2a is exposed. Thereafter, the robot 1 removes the rotor 2 from the receiving hole 3b and moves it, sets the next unpainted rotor in the receiving hole 3b instead, and repeats the above operation again.

In the above, an embodiment has been shown in which air is supplied from the air supply nozzle 5 as a means for lowering the piston 6.
The piston 6 may be lowered by other means, or even if it is lowered by air supplied from the air supply nozzle 5, air is supplied to the holding hole 6b by an air supply means other than the air supply nozzle 5. For example, an air supply hose may be connected directly to the piston 6 to supply air into the holding hole 6b. In short, during the powder coating process, the shaft 2
It is only necessary that the air pressure inside the holding hole 6b holding the holding hole 6b is higher than that outside.

According to the present invention, as described above, the shafts 2a and 2b protruding from both sides of the rotor 2 are connected to the holding portion 6a and the receiving portion 3a.
It is inserted into the holding hole 6b and the receiving hole 3b provided in the
, 3b are coated with powder paint so that the air pressure is higher than that outside, so the paint does not enter into the holes 6b, 3b due to this pressure difference, and therefore the shafts 2a, 2b cannot be touched by hand. There is no need to put a rubber cap on the shaft 2 during the painting process.
Since paint is completely prevented from adhering to a and 2b,
There is no need for a cleaning process after painting, which not only reduces the number of processes, but also prevents the shaft surface from becoming rough due to the cleaning process, which has an extremely large economic and functional effect. is obtained.

[Brief explanation of drawings]

The drawings are explanatory diagrams of main parts showing an embodiment of the present invention. 1・・・・・・・・・Rohot 2・・・・・・・・・Rotor 2a, 2b...shaft ３．・・・・・・・・・Holder 3a・・・・・・Receiving part 3b・・・・・・・・・Receiving hole 4・・・・・・・・・Cylinder 5・・・・・・・・・Air supply nozzle 6・・・・・・・・・Piston 6a・・・・・・・Holding part 6b・・・・・・・Retaining hole 7... Spring

Claims (2)

[Claims] (1) A holder having a receiving hole into which one of the shafts protruding from both sides of the motor rotor is inserted, and a holding hole facing the said receiving hole, and the distance between the holding hole and the receiving hole is changed. an operating piston; one shaft of the preheated rotor is inserted into the receiving hole, the holding hole is covered with the other shaft by the operation of the piston, and at this point the receiving hole and the holding hole are separated. Air is supplied to the rotor to create a higher pressure than the outside, and the rotor, which holds the shaft in the receiving hole and the holding hole, is immersed in an atmosphere in which powder paint is floating, thereby painting the rotor except for the shaft part. Powder coating processing equipment for motor rotors. (2) The piston is provided in a cylinder and is actuated by pressurization within the cylinder, and the holding hole provided in the piston is supplied with a part of the pressurization that is the actuation means of the piston. A powder coating treatment device for a motor rotor according to item 1.