摘要:
A method for manufacturing a mirror surface tube for a photosensitive drum of a copying machine or the like, by which an external surface of an aluminium or aluminium alloy tube can be mirror-processed with high accuracy without surface defects, and in such a way that good quality required for a photosensitive drum is ensured and dimension accuracy, such as roundness, and production yield is improved involves a first step in which an aluminium or aluminium alloy tube, finished in a predetermined shape and dimension with surface roughness of 10 microns or less, is processed by a centerless grinding process. Then, in a second step, a grinding process is performed using an electrolytic integrated polishing apparatus including a tool electrode mechanism having an elastic grindstone so as to make a mirror surface tube having the surface roughness of 2.0 microns or less. Further, preferably, in a third stage, a roller burnishing process is performed to finish the tube to a surface roughness of 0.5 microns or less.
摘要:
A method for mirror processing of an external surface of a long-sized metal piece, by which the external surface is mirror-polished with precision and high efficiency without a surface defect or so that stable dimensional accuracy, such as a roundness and improvement of yield in production, can be obtained. The method comprises the steps of clamping both ends of a long-sized metal piece, applying a positive electrical charge and rotating the metal piece, and moving the long-sized metal in the axial direction through an electrolytic integrated polishing apparatus for processing the external surface of a long-sized metal piece into a mirror surface. The electrolytic integrated polishing apparatus includes a plurality of grindstones pressed onto the long-sized metal piece from the opposite directions or from outside to the rotation axis radially at a constant pressure, and negative electrodes disposed so that each of the grindstones is disposed between the electrodes in the circumferential direction so as to integrate abrasion of the long-sized metal piece by grindstones and concentration elution by an electrolyte for mirror processing of the external surface of the long-sized metal piece.
摘要:
To provide an electrolytic integrated polishing method for the external surface of metallic tubes, wherein both dimensional precision such as roundness or the like and product yield can be improved, and aluminum alloy photosensitive drum substrates prepared thereby. A metallic tube, both ends of which are supported, is positively charged and rapidly rotated about the axis thereof. More than one grindstone are pressed with a constant pressure against the external surface of the metallic tube from opposite directions or radial directions having the rotation axis as the center of rotation. Negative pole electrodes are disposed so as to sandwich the grindstones along a circular direction to perform electrolytic integrated polishing by supplying electrolyte to the external surface of the metallic tube. High-precision mirror processing of the external surface of the metallic tube can be performed by an integrating abrasion effect for eliminating a passivation coating formed on the external surface of the metallic tube by the grindstones and intensive electrolytic elution by the electrolyte.
摘要:
A cleaning apparatus for use in pickling facilities for tubular members such as zirconium or zirconium alloy tubes. The apparatus includes a travelling crane for conveying and loading the tubular members from one cleaning tank to another, a pair of endless wrapping connectors such as endless chains spacedly and circulatably provided in at least one tank, for example, in a first cleaning tank filled with slightly warm water below the level of its cleaning fluid, and a plurality of feed claws provided with an interval therebetween on each of the endless wrapping connectors along the length of the same so as to prevent the tubular members from contacting one another during cleaning treatment. Thus, development of stain or physical damage such as scratches or dents is eliminated or minimized. It is possible to tentatively stock the tubular members on the endless wrapping connectors so as to perform a smooth and continuous pickling and cleaning operation of such tubular members.
摘要:
There is provided an electrolytic integrated polishing apparatus which enables high precision polishing of the internal surface of a long sized cylindrical workpiece such as a metallic tube. The apparatus includes a work supporting unit 13 for disposing the cylindrical workpiece W, so that the axial center of the cylindrical portion is aligned with the vertical direction, a rotation shaft 4 supported downward along the vertical direction and free-rotatably supported in an external tube 3 which is freely movable along the vertical direction, a tool electrode 5 including a grindstone directed to radial directions, attached to the tip of the rotation shaft 4, and a plastic tube 6 wound around the external surface of the external tube 3 for pressurization.
摘要:
A process and an apparatus within which there is provided at least one, or a plurality of tanks in series relation, depending upon the type of member being treated, each tank having one or more openings within its walls, respectively, which are provided in alignment with each other. With this apparatus, one or more metal members such as for example, a bar, rod, pipe, or tube, is rotatably fed through the aforenoted openings into the tank or tanks, thereby enabling a continuous automatic-etching process of the outer surface of the metal members to be performed. As an alternative, there is provided within each tank, a triple walled cylindrical body or solution flow guide, whereby a solution for etching may uniformly flow in the direction of the metal member being conducted through the tank or tanks, and along the outer surface thereof, so that a desired surface condition of the bar, rod, pipe or tube may be obtained in an efficient manner.
摘要:
Providing an electrolytic integrated polishing method for metal workpieces using a special abrasive material which leaves no residual abrasive grains on surfaces of soft metals such as aluminium, and the like, and allows high-precision abrasion for optimal surface treatments such as an anodized aluminium finish at the next process. The electrolytic integrated polishing device performs rough abrasion and medium abrasion processes to the inner surface of an aluminium cylindrical workpiece by an elastic grindstone. Thereafter, the electrolytic integrated polishing device uses a sheet-form abrasive material for finishing abrasion. The sheet-form abrasive material is prepared by uniformly dispersing, short fibers including abrasive grains which is prepared by cutting an abrasion grains containing fiber into a specified length and synthetic fibers as a base material, processing them into a sheet, and hardening it with a thermosetting resin such as a polyurethane resin, an epoxy resin, and the like as an adhesive material. A plurality of these sheet-form abrasive materials are piled and are mounted on the holder through the aid of a spring plate for buckling prevention to compose the special abrasive material.
摘要:
There is provided an electrolytic integrated polishing apparatus which enables high precision polishing of the internal surface of a long sized cylindrical workpiece such as a metallic tube. The apparatus includes a work supporting unit for disposing the cylindrical workpiece, so that the axial center of the cylindrical portion is aligned with the vertical direction, a rotation shaft supported downward along the vertical direction and free-rotatably supported in an external tube which is freely movable along the vertical direction, a tool electrode including a grindstone directed to radial directions, attached to the tip of the rotation shaft, and a plastic tube wound around the external surface of the external tube for pressurization.
摘要:
A cutting and chamfering apparatus for opposite ends of a tubular member including a cutting and chamfering support for holding horizontally the member, two tables provided respectively at opposite ends of the support, and a cutting machine and chamfering machine mounted in combination on each of the tables.
摘要:
A pipe polishing apparatus of the type in which a polisher rod is extractably inserted into a pipe to be polished and polishing grains are injected into a gap between the polisher rod and pipe while rotating the rod and pipe in opposite directions for polishing the interior surface of the pipe. The polisher rod has an outside diameter which is reduced stepwise or continuously in the polishing grain injecting direction to eliminate the localized abnormal abrasion of the polishing surface or the so-called "bell mouth phenomenon."