摘要:
A method of making a mold which is utilized to manufacture a tire, the mold having a contour curved surface with broad bone portions and narrow blade portions extending therefrom, comprises a first machining stage utilizing a plurality of electrical discharge machining electrodes for approaching a workpiece used to make the mold, at different angles. Each of the electrodes used in the first machining stage are shaped to avoid the removal of excessive metal from the mold so that both the bone portions and the blade portions can extend normally from the contour curved surface. The method includes a second machining stage utilizing a further electrical discharge machining electrode which has recesses for receiving bone portions and blade portions formed by the first stage electrodes, and is movable laterally of the contour surface to form well-defined edges of the bone and blade portions.
摘要:
This invention relates to a continuous tone lithographic printing plate comprising a treated anodized aluminum surface having thereon an ink-receptive, image-forming layer of a photosensitive composition capable of forming photographic films that can be exposed and processed to give images having a gamma in the range 0.3-2.5.
摘要:
An apparatus and method of electrochemically machining a surface of revolution on a rotating workpiece includes rotating the workpiece about its axis and positioning an electrochemical machining tool having an essentially flat machining surface adjacent the workpiece to form a gap. The tool includes a machining surface having a straight edge in a plane which also includes the axis of the workpiece. The machining surface is oriented essentially perpendicular to the plane so that the smallest gap dimension exists between the straight edge of the tool and the workpiece. Electrolyte is introduced into the gap in a direction so that it flows across the machining surface and between the tool and the workpiece in a direction parallel to the direction of relative movement and toward the smallest gap dimension.
摘要:
The recast surface layer on a laser-drilled hole is removed by an ECM technique that involves positioning an electrode in the hole and flowing an electrolyte through the hole and around the electrode in a direction toward the large end of the taper.
摘要:
There is disclosed a method for electrical discharge machining of a workpiece in the form of a roll by application of an electrical voltage across said workpiece and an electrode or electrodes mounted opposite to each other with a predetermined gap therebetween, and more particularly such method wherein each such electrode is formed by plural electrode segments separated from one another by insulators, and the electrical discharge operation is performed with said electrode segments in each electrode short-circuited to one another in the rough machining step and with said electrode segments insulated from one another in the finish machining step for reducing the working time.
摘要:
There is disclosed an apparatus for giving a satin finish to the surface of a crowned roll. A plurality of electrode heads are divided and arranged along the axis of rotation of the crowned roll to be worked, and one or a plurality of rectangular electrodes are mounted at a predetermined spacing on each of the electrode heads. The discharge gap of each rectangular electrode is controlled by a servomechanism at a predetermined value and it is also fed traversely a predetermined distance by a traverse feed mechanism. The electrode is rectractably mounted on the electrode head and it is fixed in position so that the discharge surface of the electrode is projected into contact with the roll surface of the crowned roll. The discharge electrode surface of each rectangular electrode is initially flat and this discharge surface is consumed to conform with the shape or contour of the roll surface upon initiation of discharge.
摘要:
In a method of mirror-finishing a cylindrical workpiece, according to which, with an abrasive matter and an electrolyte disposed at and supplied to each of the gaps between a cylindrical workpiece connected to the anode of a power supply and working electrodes connected to the cathode of the power supply and disposed oppositely to the outer surface or the inner surface of said cylindrical workpiece, an anodic liquation operation by electrolysis performed onto metal in the surface to be treated of the cylindrical workpiece is assisted with an abrasive operation by which anodic passive films generated on the surface to be treated are mechanically abrased by the abrasive matters, whereby the projected portions of the surface to be treated are electrolytically liquated and abrased preferentially, said method is characterized in that an electrolyte in a passive state is used, an electrolytic voltage to be used is in the range from a few V to about 15 V, the density of an electrolytic current to be used is about 10A/cm.sup.2 or less, the abrasive matter has a water-permeable property, the pressing force of the abrasive matters to the surface to be treated is 0.5 kgf/cm.sup.2 or more, the abrasive speed of the abrasive matters is 2 m/s or more, and the cycle which a portion of the surface to be treated is faced to the working electrodes is in the range from 20 to 200 ms.
摘要翻译:在对圆柱形工件进行镜面精加工的方法中,根据该方法,将研磨物质和电解质置于连接到电源的阳极的圆柱形工件和连接到阴极的工作电极之间并提供给每个间隙 的电源并且与所述圆柱形工件的外表面或内表面相对地设置,通过在圆柱形工件的待处理表面中的金属上进行电解的阳极液化操作被辅助,其中阳极钝化膜 在待处理表面上产生的磨损物质被机械磨损,由此待处理表面的突出部分被电解液化并优先磨损,所述方法的特征在于使用处于被动状态的电解质,电解电压 要使用的范围是从几V到约15 V,电解质的密度 t为约10A / cm 2以下,研磨材料具有透水性,研磨剂对被处理面的压力为0.5kgf / cm 2以上,研磨剂的研磨速度 为2m / s以上,被处理面的一部分面向工作电极的周期为20〜200ms。