摘要:
A pulsed discharge is generated between tip ends of a rotating member such as a blade and a discharge electrode including a hard material such as cBN in dielectric liquid or gas by a power supply for discharge to melt the discharge electrode, and a part of the discharge electrode is attached to the tip end of the rotating member to form an abrasive coating film including the hard materials such as cBN.
摘要:
A deposition is gradually formed by molding a product main body, removing a defect periphery including a defect generated on a surface to be treated of the product main body by molding so that a recess portion is formed on the surface to be treated of the product main body, employing a molded electrode composed of a molded body molded from a powder of a metal or the molded body processed with a heat treatment, and generating a pulsing electric discharge between the recess portion periphery including the recess portion and the molded electrode in an electrically insulating liquid or gas so that a material of the molded electrode or a reaction substance of the material carries out deposition and such at the recess portion periphery by energy of the electric discharge.
摘要:
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:
It is an object of the present invention to obtain a discharge surface-treatment method and a discharge surface-treatment apparatus that are capable of performing treatment for forming a dense and relatively thick film. When a voltage is applied to the inter-electrode gap between a discharge electrode 21 and a workpiece 22 from a first power supply 23 and electric discharge occurs, a voltage for feeding a second discharge current of a current value higher than that of a first discharge current generated by the first power supply 23 is applied to the inter-electrode gap from a second power supply 28 for a short period to be superimposed on the first discharge current. Consequently, a discharge pulse current of a high current value and a short pulse width at least having rising speed equal to or higher than 40 A/µs flows to the inter-electrode gap. As a result, it is possible to melt only a necessary portion of an electrode material in a short time and include, at a high ratio, the electrode material melted in an electrode material moved to a workpiece side by thermal energy of electric discharge or a substance formed by combination of the electrode material. This makes it possible to form a film made of melted metal on a workpiece surface.
摘要:
A nozzle for processing machinery, wherein a hard ceramics coating is formed on the surface of the base metal of the nozzle for processing the machinery to prolong the service life thereof. Since the hard ceramics coating is formed on the surface of the base metal of the nozzle for the processing machinery, the nozzle for processing the machinery is hard to be scratched on the surface thereof and highly resistant to heat. Thus, service life can be prevented from being shortened due to the occurrence of scratch by the contact thereof with a warped work during processing and the deformation thereof by heat in the nozzle for processing the machinery to realize an increased service life.