JPS6015703B2 - Surface treatment equipment for plate-shaped workpieces with shafts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for surface-treating a disk-shaped workpiece with a shaft.

For example, in a so-called adjacent workpiece (hereinafter simply referred to as a workpiece) consisting of a shaft portion and a disc-shaped flange portion, such as a disc brake rotor, the device is used to apply chemical conversion treatment to only the flange portion excluding the shaft portion. There are structures shown in FIGS. 1 and 2.

The chemical conversion treatment referred to here is a type of surface treatment method for the purpose of improving mirror resistance (rust resistance). ) A barrel work is soaked and tertiary zinc phosphate is deposited on the surface of the work to form a zinc phosphate film. That is, the first
As shown in the figure, the first water washing process, the chemical conversion treatment process, the second water washing process, and the third water washing process are carried out in the order of the first water washing tank 1,
A chemical conversion tank 2, a second water washing tank 3, and a third water washing tank 4 are simultaneously treated, and among these, the chemical conversion tank 2 stores the chemical conversion treatment liquid containing the aforementioned monobasic zinc phosphate as a main component. On the other hand, fresh water is stored in each of the washing tanks 1, 3, and 4, respectively. Also, each tank 1, 2, 3
, 4 is disposed above a conveyor 5 consisting of a rail 6 and a plurality of hangers 7, 7, . The chemical conversion treatment described above is performed by sequentially immersing the liquid in each tank from the first water washing tank 1 to the chemical conversion tank 2 and further to the second and third water washing tanks 3 and 4. Here, since the chemical conversion treatment is intended to be applied only to the flange part F of the workpiece W, conventionally a bottomed cylindrical rubber boob B is attached to the koji part S of the workpiece W as shown in FIG. It is covered and masked, thereby preventing the chemical conversion treatment from being performed even on the ball part S. However, according to the above-mentioned conventional chemical conversion treatment equipment, work efficiency is poor because it is necessary to attach and detach the rubber pulley for masking when attaching and detaching the workpiece to and from the conveyor (hanger), and it is difficult to perform the actual work. The problem is that the conveyor is relatively expensive, leading to a rise in overall equipment costs.

In view of the above points, this invention was made for the purpose of improving the workability.For this purpose, in the present invention, the workpiece is rolled by applying its own weight or external force. It is characterized in that it is transported on a guide rail while being rotated as a surface, and during the transport process, only the flange portion is immersed in a treatment liquid to locally perform surface treatment such as chemical conversion treatment.

Embodiments of the present invention will be described below with reference to the drawings in the case of the above-mentioned chemical conversion treatment apparatus.

That is, FIGS. 3, 4, and 5 show one embodiment of the present invention, and in particular, FIG. 3 shows its overall configuration.

As shown in the figure, in the same way as before, the first water washing process, chemical conversion treatment process, second water washing process, first step, third washing process are carried out in the order of the first water washing tank, the chemical conversion tank 2, the second washing tank 3, and the third washing tank 4. Each is installed horizontally, and chemical conversion tank 2
The chemical conversion treatment liquid stored in and each washing tank, 3,
The liquid level level bells of fresh water stored in 4 are individually managed by the liquid level management device 10' so that all the level bells are the same. A pair of guide rails 11, 12 are provided above each of these tanks, 2, 3, and 4, and are continuous from the front of the first washing process to the rear of the third washing process, and these guide rails 11, 12 Of these, the horizontal portions 11a and 12a located directly above the center of each tank are lowered to near the respective liquid levels and are slightly in contact with the respective liquid levels.

Above each tank 1, 2, 3, 4, belt conveyors 13A, 13B, 13C, 13D are arranged with the guide rails 11, 12 in between for rolling the work W along the guide rails 11, 12. Separately provided for each tank. These conveyors 13A, 13B, 13C, 1
3D all have the same configuration, so only the conveyor 13B will be explained. This belt conveyor 13B is
As shown in the drawings and FIG. 5, a relatively wide endless belt 17 and an auxiliary roller are stretched between the driving roller 5 and the driven roller 6 on the driving shaft 14 so as to be parallel to the guide rails 11 and 12. 8, the belt 17
It is composed of a motor 19, a speed reducer 20, a variable distance pulley 21, a V-belt 22, etc., for rotationally driving the guide rails 11, 12, and the inclined portions 11b, 12b of the guide rails 11, 12.
By the belt 17 coming into pressure contact with the outer peripheral surface of the workpiece W that is rolling under its own weight, the workpiece W is sequentially conveyed to the next process along the guide rails 11 and 12. . In addition, 23 in FIG. 3 is the guide rail 11.
, 12 is a stopper for storing the work W, and is moved up and down by a cylinder 24. Next, the operation of the apparatus configured as above will be explained.

First, as shown in FIG. 3, the work W placed on the starting ends of the guide rails 11, 12 with the shaft S as a rolling surface is stopped by hitting the stopper 23, and is stored at that position.

Then, when the stopper 23 is placed under the cylinder 24, the workpiece W rolls on the slopes 11b and 12b with the shaft S as a rolling surface due to its own weight, and rolls on the horizontal parts 11a and 12b.
2a, the belt 17 of the belt conveyor 13A comes into pressure contact with the outer periphery of the flange portion F of the workpiece W, so the workpiece W rolls on the guide rails 11 and 12 while being immersed in the water in the first washing tank. It is transported rightward in the figure. Here, since the heights are set so that the horizontal parts 11a and 12a of the guide rails 11 and 12 are just barely touching the liquid level in the tank 1, only the flange part F of the workpiece W is exposed to the water in the tank 1. It is soaked and subjected to a first water washing treatment. next,
The workpiece W that has been subjected to the first water washing treatment is transported to the chemical conversion tank 2 side for the chemical conversion treatment process by the above-mentioned weight transfer and forced rolling by the belt, and here too, only the flange portion F is inside the chemical conversion treatment liquid. Since it is immersed in water, only the flange portion F is subjected to a chemical conversion treatment containing dibasic zinc phosphate as a main component.

The workpiece W, which has undergone the chemical conversion treatment process, is transferred to the second machine in the same machine.
The guide rails 11 and 12 pass through the second water washing tank 3 which is a water washing process and the third water washing tank 4 which is a third water washing process.
are carried out to the terminal ends 11c, 12c. In other words, according to this embodiment, the workpiece W is transported on the guide rails 11 and 12 while being rotated by applying its own weight or an external force, and during the transport process, only the flange portion F is immersed in the processing liquid, thereby causing the local parts to be damaged. It is a chemical conversion treatment.

6 and 7 show another embodiment of the present invention, in which the endless belt 17 is pressed against the shaft S of the workpiece W instead of the flange F. Other than that, this embodiment is the same as the previous embodiment.

Of course, this embodiment also has the same effect as described above. In each of the above embodiments, the case of chemical conversion treatment was explained, but the present invention can also be applied to any surface treatment other than chemical conversion treatment such as painting or plating.
Although not shown, it goes without saying that the height, width, speed, etc. of the guide rail and belt conveyor can be adjusted as appropriate depending on the size of the workpiece.

As described above, according to the present invention, there is no need for masking using boots as in the past, so workability can be improved and the surface treatment work can be carried out efficiently.
Furthermore, since the conveyance device itself does not require a hanger, it has the effect of reducing overall equipment costs.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram vaguely showing the structure of a secondary chemical conversion treatment equipment, Fig. 2 is an enlarged perspective view showing details of the main parts of Fig. 1, and Fig. 3 is an embodiment of the present invention. An explanatory diagram showing the overall configuration of the chemical conversion treatment apparatus, FIG. 4 is an enlarged view of the main part of FIG. 3, FIG. 5 is a side view of FIG. 4, and FIGS. 6 and 7 are other embodiments of the present invention. FIG. 1...First flush tank, 2...Chemical conversion tank, 3...Second flush tank, 4...
3rd flush tank, 11, 12... Guide rail, 13A
, 13B, 13C, 13D...belt conveyor, 17...
...Belt, 19...Motor, w...Plate-like workpiece with shaft, F...Flange, S...
Shaft. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] 1. In an apparatus for performing a predetermined surface treatment on a shafted plate-shaped workpiece consisting of a shaft portion and a plate-shaped flange portion by limiting only the flange portion, a tank containing a predetermined surface treatment liquid; a pair of guide rails disposed above the tank and set so that a portion thereof is substantially flush with the surface treatment liquid level, and for rolling and conveying the guide rails using the shaft portion as a rolling surface; A surface treatment device for a shafted disk-shaped workpiece, comprising a belt conveyor that presses against the outer periphery of the workpiece in order to apply rotational force to the workpiece.