JPS6156318B2 - - Google Patents

Description

[Detailed Description of the Invention] Conventionally, in order to plate the outer periphery of a ring-shaped object, the cylinder is vertically immersed in the plating solution by rotating the shaft head that passes through the center of a cylinder in which many rings are stacked. The main disadvantage is that metal powder gets mixed into the plating solution due to wear of the rotating head. The present invention aims to solve this problem and further improve workability and facilitate automation.

First, the conventional method will be explained with reference to FIGS. 1 to 3. The rotary drive mechanism includes a spur gear 11 driven by a motor, a spur gear 1, a shaft 1', a bevel gear 1'', and a rotating disk 2. A plating jig A consisting of a shaft 5, a fixing plate 6, a holding plate 6', a holding nut 6'' and a feeding flange 7 is set on a rack consisting of a carrier bar 3 and a power feeding part 4. The pinning jig on which the workpiece 12 is mounted is the conveyor 8.
When the rack is transported through each treatment tank and, for example, transported to the plating tank 24, the entire rack is made into a conductive part by a fixed power supply section 9 provided on the tank side, and the plating jig A is connected to the plating jig A via the power supply flange 7. Electrolytic treatment was carried out by passing an electric current through the electrodes 10 in the bath. In this case, the power supply flange 7 is inserted from the side A, and its protrusion B is rotated by the rotating disk 2, and the bottom surface of the flange 7 wears due to sliding, which shortens the life of the plating jig. There was a problem that metal powder due to wear entered the plating tank 24. Furthermore, since there is a protrusion on the upper surface of the power supply flange 7, the plating jig A had to lie down instead of standing up, which was inefficient. Furthermore, in all known methods of rotating plating jig A, not limited to this example, the head of the jig wears out due to sliding due to rotation, and metal powder is mixed into the plating tank. The present invention improves the plating jig and eliminates the above-mentioned drawbacks by means of a rotary power supply method, thereby contributing to improved productivity. The details will be explained below with reference to the drawings.

FIG. 4 is a perspective view of a piston ring mounted on a plating jig A according to the present invention, FIG. 5 is a vertical sectional view of the entire plating device, and FIG. 6 is an external view of the main parts.
First, to explain the plating jig, 7, which is the head of jig A, is a power supply flange, which has a mortar-like external shape, its upper surface is flat, its diameter is relatively large, and there is a peripheral edge in the center. A recess 7' with a flange 7'' is formed in the flange 7''. Therefore, by turning the jig A upside down, the jig A can be stably erected in the work place. ) 12 are stacked and pressed with the holding plate 6', and tightened with the holding nut 6''. The concave portion 7' with the flange 7'' is provided to enable the jig A to be gripped and transported from above. During the plating process, the power supply flange 7 has a conical outer surface that is connected to the rotary power supply body 14, which will be described later. The object to be processed hangs down into the plating solution by closely contacting the inclined inner circumferential surface of a similar shape opening in the center of the jig A. A groove 13 is provided on the slope of the jig A, and a power supply main body 14 When inserting from above into the central hole seat of (Contact) was good. This is because there is a convex part in the vertical middle of the inclined surface, which prevents damage to the contact surface.In the present invention, the power supply main body 14 (made of copper) and the power supply flange 7 ( (made of copper) is metal that comes into close contact with each other and is fixed to each other during operation, but when sliding and rotating on this surface as in the conventional method, there is a high degree of wear on the upper and lower sides of the slope. As a result, there was an extremely large tendency for the central peripheral zone to become convex.As explained above, this jig A
According to the above, when transporting the workpiece 12 with the workpiece 12 attached, because the diameter of the power supply flange is large, the top surface is placed on the floor, placed on a trolley, or before and after plating processing, for example, when the workpiece is attached. It is also convenient for transportation to buffing after plating, etc., and does not damage the surface of the workpiece, contributing to improved yield, and the installation of grooves promotes vertical centering and improves conductivity. Good surface contact was achieved. As a natural result of the present invention, the power supply flange is free from wear due to sliding, so the life of the jig is semi-permanent and the conductive contact is always good.

Next, the drive mechanism and the entire device of the present invention will be explained with reference to the embodiments shown in FIGS. 5 and 6. The drive mechanism B is arranged on a substrate 25 that is placed on four insulators 21 fixed on an anode support 23 via springs 22. Reference numeral 17 denotes a motor as a power source, which rotates the power supply body 14 by driving a sprocket 15 fixed to the rotary power supply body 14 via a chain 16. However, a method of direct driving without using a chain may also be used.
The power supply main body 14 is a conductor (made of copper), and is a thick circular plate with an inclined seat hole provided in the center. A stepped portion 14' is provided on the lower surface thereof, and the outer periphery of the stepped portion is fitted into the fixed power supply plate 18, so that a constant position is always maintained. However, it is not limited to the cam floor as in the embodiment. The upper surface of the fixed power supply plate 18 corresponds to the thrust bearing of the jig A, and its sliding surface is provided with a power supply crystal to ensure smooth sliding and more reliable power supply. By the way, since the rotary power supply body 14 has a hole seat at the center, it is driven from the side by the chain 16 and the sprocket as described above, so the distribution of the power supply grids may be biased, but in this case, the distribution of the power supply plate 18 may be biased. It is also possible to install a vibrator 19 at a position where a connecting bus bar (not shown) is attached to the board 25 to vibrate the power supply plate 18 so that the power supply grease is distributed more uniformly between the sliding surfaces. This resonates with the fact that the base plate 25 is supported by the spring 22, achieving extremely effective uniformity and eliminating the negative effects of non-centered drive, or providing oil grooves on the thrust bearing surface to distribute the oil. may be made uniform, or a forced lubrication method may be adopted. In addition, 24 is 1 in the plating tank.
0 is the positive electrode. Figure 5 shows automatic jig clamp 2
At step 6, the plating process is performed after the clamp 26 is pulled out while the jig A with the workpiece 12 mounted thereon is accurately placed on the power supply main body 14. As described above, according to the present invention, the structure is simple, but there is no sliding between the plating jig A and the rotary power supply main body 14, and as a result, there is no wear on the jig A, and the jig becomes a consumable item. This problem was solved, and it was possible to prevent metal powder from entering the plating liquid tank due to wear. Furthermore, since the rotary power supply main body is constantly rotating during operation, the workpiece 12 is always rotated vertically in the plating tank 25, which also contributes to quality improvement.

[Brief explanation of the drawing]

1-3 are illustrations of the conventional method. FIG. 4 is an external view of the plating jig of the present invention, FIG. 5 is a longitudinal sectional view of the plating apparatus, and FIG. 6 is a perspective view of the main parts. 7... Power supply flange, 7'... Recess, 7''... Flange, 12... Workpiece, 13... Groove, 14...
...Rotating power supply body, 14'...Step, 15...Sprocket, 16...Chain, 17...Motor, 18...Fixed power supply plate, 21...Insulator, 22
... Spring, 23 ... Anode support, 24 ...
...Plating tank, 25...Substrate, A...Jig, B...
Drive mechanism.

Claims (1)

[Scope of Claims] 1. An inclined hole seat is provided in the center as a support seat for electrically contacting and fixing the head of a slugging jig with a large number of ring-shaped workpieces mounted between the upper and lower plates of the jig shaft. A rotary power supply body 14 having a rotary power supply body 14 is disposed on a fixed power supply plate 18 which also serves as a thrust bearing.
4 is mounted and rotated, and the jig is rotated while the jig and the power supply main body are electrically contacted and fixed. 2. In a plating device that rotates by stacking a large number of ring-shaped objects on a plating jig and suspending them in a plating tank, an insulator is fixed on an anode support plate and supported via a spring. A fixed power supply plate 1 is mounted on a base 25, which is driven by a motor, chain, sprocket, etc. as a drive mechanism, and has a rotary power supply body 14 which also serves as a jig seat for the object to be processed and which also serves as a thrust bearing.
8. A rotary power supply plating device which is mounted on a cam floor type and rotates, and distributes power supply grease uniformly on the sliding surface of the bearing. 3. In a jig in which a large number of ring-shaped workpieces are attached between the upper and lower plates of the jig shaft and plated to form a cylindrical outer shape, a mortar-shaped conductor is attached to the head of the plating jig. A rotary power supply plating jig with a power supply flange 7, comprising a power supply flange 7, a flanged recess 7' provided in the center of the upper surface of the flange, and a groove 13 formed in the middle of a conical slope.