摘要:
An image forming apparatus according to an embodiment includes: an image carrier; a transfer device which transfers a toner image formed on the image carrier onto a recording medium; a resistance measuring device which causes a current to flow through the recording medium before transferring the toner image and measures the resistance of the recording medium; and a setting unit which sets a condition of the transfer on the basis of the measurement result of the resistance of the recording medium. The resistance measuring device includes an electric shock prevention member which prevents the current from flowing to a user through the recording medium during the measurement of the resistance of the recording medium.
摘要:
An image forming apparatus according to an embodiment includes: an image carrier; a transfer device which transfers a toner image formed on the image carrier onto a recording medium; a resistance measuring device which causes a current to flow through the recording medium before transferring the toner image and measures the resistance of the recording medium; and a setting unit which sets a condition of the transfer on the basis of the measurement result of the resistance of the recording medium. The resistance measuring device includes an electric shock prevention member which prevents the current from flowing to a user through the recording medium during the measurement of the resistance of the recording medium.
摘要:
A discharge surface treatment electrode used in discharge surface treatment for forming a wear-resistant film on a treatment target surface of a workpiece by use of the discharge energy of electric discharges caused between the electrode and the workpiece, the film being made of a material of an electrode or a substance obtained by a reaction of the material of the electrode with the discharge energy. The discharge surface treatment electrode is formed by: compression-molding a mixed powder into a green compact, the mixed powder being formed from a powder of a Stellite alloy with an average particle size of 3 μm or less prepared by use of a jet mill and a powder of a metal with an average particle size of 3 μm or less manufactured through an atomization process or a chemical process; and subjecting the green compact to heat treatment.
摘要:
An apparatus and a method to form a thick coat by an in-liquid pulsed electric discharge treatment, the electrode contains 40 volume % or more metallic material that is not carbonized or is hard to be carbonized.
摘要:
A method for closing a hole with a coating is provided. The method comprises attaching the subject body to an electric spark machine as a workpiece; bringing an electrode of a powder including an electrically conductive substance close to the subject body so as to lap the electrode over the hole; applying a voltage between the electrode and the subject body so as to generate electric discharge repetitiously to cause a coating closing the hole to grow from a periphery of the hole; and machining an edge of the hole before applying the voltage, or the coating along the edge of the hole during repetition of applying the voltage, to give a bevel.
摘要:
A method and a device for electrochemically machining workpiece having blade end plates at the longitudinal both ends of a blade-shaped portion having aerofoil shape in cross section by extending and retracting divided electrodes. A part of the blade-shaped portion and one blade end plate continued therewith are electrochemically machined by advancing the main electrode in an acute angle direction relative to the longitudinal direction of the blade-shaped portion. At the same time or subsequently, the remaining part of the blade-shaped portion and the other blade end plate continued therewith are electrochemically machined by slidably advancing an auxiliary electrode along the slope of the main electrode forming an acute angle relative to the blade-shaped-portion-machining-surface. Thus, the number of the parts of an electrode unit can be reduced and the structure thereof can be simplified.
摘要:
A method, apparatus, and electrode for electric discharge surface treatment. The electrode is a green compact made by molding metallic powers or metallic compound powders, the green compact being heat treated and used for electric discharge surface treatment in which a pulsed electric discharge is generated between the electrode and a work in a dielectric fluid to form by the electric discharge energy on the surface of the work a coat of a material of the electrode or of a substance that is generated by a reaction of the electrode due to the electric discharge energy, wherein the electrode contains 40 volume % or more Co, Ni, or Fe. Thereby, a thick coat is formed by the in-liquid pulsed electric discharge treatment.
摘要:
A protective coating for protecting a component of a gas turbine engine or such from wear is provided with a base coating consisting essentially of metal and including a pore, and a spherical particle filling the pore, at least a surface of which consists essentially of a ceramic.
摘要:
An electrode for electric discharge surface treatment is a green compact formed by molding a metal powder, a metal compound powder, or a ceramic powder, and is used for electric discharge surface treatment in which an electric discharge is generated between the electrode and a work in dielectric fluid or air to form by the electric discharge energy on a surface of the work a coat of a material of the electrode or of a substance resulting from reaction of the material due to the electric discharge energy. The material of the electrode includes a material not desired to be carbonized and a material desired to be melted, and a particle diameter of the material not desired to be carbonized is larger than a particle diameter of the material desired to be melted.
摘要:
A method of evaluating an electrode for discharge surface treatment for generating a discharge between the electrode and a workpiece in a treatment liquid or in the air using a green compact obtained by molding a metal, metal compound, or ceramic powder or other green compact obtained by heating the green compact as the electrode, and forming a coat consisting of an electrode material or a substance obtained by a reaction of the electrode material by a discharge energy on a surface of the workpiece, includes evaluating a capability of the electrode to deposit the coat based on an amount of deposition of the electrode material on the surface of the workpiece by a single discharge.