JPS6051973B2 - Electrolytic compound polishing device for cylindrical inner surface - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention combines the elution action of electrolysis and the scraping action of an abrasive material, and can clean the inner surface of cylindrical bodies such as large cylindrical workpieces and long cylindrical objects with high efficiency and low efficiency. The present invention relates to an electrolytic composite polishing device for the inner surface of a cylinder, which enables uniform mirror finishing at low cost.

Conventionally, when polishing the inner surface of a large cylindrical workpiece, the method of polishing with a hand-held polishing tool has been used, but not only is the work efficiency low, it is difficult to obtain a clean and highly accurate finished surface, and it is also low cost. It is difficult to do so.

On the other hand, cutting, grinding, para-polishing, or, in some cases, electrolytic polishing are used for long cylindrical objects, but these methods have poor polishing efficiency, and low-cost polishing cannot be expected. Also,
Ordinary electrolytic polishing requires a strongly acidic electrolyte, which results in poor workability and requires mechanical surface preparation.
No matter which method is used, it is extremely difficult and costly to uniformly mirror-finish the inner surface of the cylinder. The present invention takes the above points into consideration, and polishes the inner surface of a cylindrical body such as a large cylindrical workpiece or a long cylindrical object by combining the elution action of electrolysis and the abrasion action of an abrasive material, and the abrasive material deteriorates. The purpose of the present invention is to provide an electrolytic composite polishing device for a cylindrical inner surface that can achieve a uniform mirror finish with high efficiency and low cost, without deterioration of the finished surface due to polishing, or interruption of work due to replacement of the abrasive. Embodiments will be described in detail with reference to drawings showing examples.

First, in FIG. 1 showing one embodiment, a cylindrical body 1 such as a cylindrical Noe crop is connected to the anode, and a support shaft 2 located at the axial center of the cylindrical body 1 moves forward or backward along the axial center. It is fixed to a retracting drive device (not shown) and is connected to the cathode, and a pedestal 3 is attached to the support shaft 2 via a rotary bearing or the like, and a polishing head 4 is attached to the tip of the pedestal 3. ing.

The pedestal 3 can be rotated around the support shaft 2 in the direction of arrow A by a rotating device (not shown), and the polishing head 4 has a convex shape with a radius approximately equal to the inner surface of the cylindrical body 1. An electrode tool having an electrode surface 5, a pressing device that presses the electrode surface 5 of the electrode tool against the inner surface of the cylindrical body 1 using a spring or hydraulic pressure, and an electrolyte between the electrode surface 5 and the inner surface of the cylindrical body 1. The electrode tool is connected to a support shaft 2 which is connected to the cathode through a power supply brush or the like. Further, a rotating body 6 such as a roller in contact with the support shaft 2 or a gear meshed with a gear provided on the support shaft 2 is attached to the pedestal 3, and a rotating shaft 7 of the rotary body 6 such as a roller or gear is attached to the frame 3. The abrasive material 9 is drawn out from an abrasive supply reel 8 attached to a pedestal 3 and is wound around the electrode surface 5 of the polishing head 4, thereby forming a winding device.

As this abrasive material 9, a non-woven abrasive material having water permeability, insulation properties, and elasticity is used, and abrasive grains are bonded to this abrasive material 9. Next, the operation of the apparatus of the above embodiment will be explained.

In the state shown in FIG. 1, when the electrode surface 5 of the polishing head 4 is pressed against the inner surface of the cylindrical body 1 with a predetermined pressure and the electrolytic voltage is applied, the frame 3 is simultaneously turned in the direction of arrow A. The inner surface of the inner surface is subjected to electrolytic composite polishing by the leaching action of electrolysis and the abrasion action of the abrasive material 9, and a rotating body 6 such as a roller or gear that contacts or meshes with the fixed support shaft 2 rotates around the support shaft 2. Rolling, rollers or teeth. The abrasive material 9 that has passed through the electrode surface 5 is wound around the rotating shaft 1 of a rotating body 6 such as a car, and new abrasive material 9 is drawn out from the abrasive material supply reel 8 to the electrode surface 5. moreover,
Simultaneously with the rotation of the pedestal 3, the support shaft 2 advances at a constant speed along the axis, and the polishing head 4 advances in the axial direction at a constant speed while rotating the inner surface of the cylindrical body 1. Polish evenly. Note that the winding speed of the abrasive material 9 depends on the number of rotations of the pedestal 3, the spindle 2 and the rotating body 6 such as a roller or gear.
These dimensions are determined from the service life of the abrasive material 9.

For example, abrasive pressing pressure: 0.5 to 1k9f/Cll,
When the abrasive rubbing speed is 1 to 2 m/s, the abrasive service life is 40 to 60 n11n, and the inner diameter of the cylindrical body 1 is 1 m1, and the circumferential dimension of the electrode tool is 0.37 T1. In this case, the abrasive winding speed is 0.2 to 0.4 or more per rotation of the polishing head.

Therefore, from this abrasive material winding speed, the dimensions of the support shaft 2, the rotating body 6 such as a roller or gear, and the rotating shaft 7 can be determined, and if necessary, the speed may be reduced using an intermediate gear or the like. In the embodiment shown in FIG. 1, the winding and rubbing direction of the abrasive material is in the opposite direction to arrow A, but as shown in FIG. 2, it may be in the same direction. As described above, according to the electrolytic composite polishing apparatus for the inner surface of a cylinder of the present invention, there is provided a support shaft located at the axis of the cylinder, a drive device for moving the support shaft along the axis, and a drive device for moving the support shaft along the axis. a rotating device that rotates the platform around the support shaft; and a rotating device attached to the tip of the platform that rotates the inner surface of the cylindrical body by a combination of elution action by electrolysis and abrasion action by an abrasive material. a polishing head that performs polishing, an abrasive supply reel that is attached to the pedestal and supplies an abrasive, a rotating body that is attached to the pedestal and rotates while connected to the spindle, and a rotating body that is pulled out from the abrasive supply reel. By providing a rotating shaft of the rotating body that winds up the abrasive material covering the electrode surface of the polishing head, the inner surface of a cylindrical body such as a large cylindrical workpiece or a long cylindrical object can be mirror-finished. By constantly feeding new abrasive material into the machining gap, the polishing process can be performed continuously, and there is no deterioration of the finished surface due to deterioration of the abrasive material or interruption of work due to replacement of the abrasive material, resulting in high efficiency, low cost, and A uniform mirror finish can be achieved.

[Brief explanation of the drawing]

FIG. 1 shows one of the electrolytic composite polishing devices for the inner surface of a cylinder according to the present invention.
FIG. 2 is a front view of another embodiment.

Claims (1)

[Claims] 1. A support shaft located at the axis of a cylindrical body, a drive device that moves the support shaft along the axis, a pedestal supported by the support shaft, and a mount that rotates the pedestal around the support shaft. a rotating device; a polishing head attached to the tip of the pedestal for polishing the inner surface of the cylindrical body by a combination of elution action by electrolysis and abrasion action by the abrasive; and an abrasive material attached to the pedestal for supplying the abrasive material. a supply surl; a rotating body that is attached to the mount and rotates while connected to the support shaft; and a rotating shaft of the rotating body that winds up the abrasive that is drawn out from the abrasive material supply reel and covers the electrode surface of the polishing head. An electrolytic composite polishing device for the inner surface of a cylinder, characterized by comprising: