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Publication Number
US-12564875-B2
Publication Date
2026-03-03
Expiration Date
Abstract
Provided is a method of manufacturing a vibration transmission member for an ultrasonic treatment tool. The method includes: applying a release agent between a surface of a vibration transmission member configured to transmit ultrasonic vibration and a die for hot forging; performing hot forging to form the vibration transmission member after the applying of the release agent; removing, after the performing of the hot forging, a part of an oxide film formed in the performing of the hot forging by a first surface treatment; performing pickling to remove the oxide film after the removing of the part of the oxide film by a blasting treatment; and performing coating with a resin after the performing of the pickling.
Core Innovation
The document describes a method of manufacturing a vibration transmission member for an ultrasonic treatment tool. The method includes applying a release agent between a surface of a base material and a die for hot forging, then performing hot forging to form a vibration transmission member configured to transmit ultrasonic vibration. A part of an oxide film formed on the surface during the hot forging is removed by a first surface treatment, and a remainder of the oxide film not removed in the first surface treatment is removed by pickling.
After removing at least a part of the oxide film remainder by pickling, the method coats at least part of the surface of the vibration transmission member with a resin. The document further performs a second surface treatment after the pickling and before the coating. In both the first and second surface treatments, blasting treatments are performed, using a first projection material and a second projection material, respectively.
A key constraint is that a diameter of the second projection material is larger than a diameter of the first projection material. The document also includes an embodiment that adds the second blasting step with a larger-diameter projection material before resin coating.
Claims Coverage
The independent claims cover a sequential manufacturing method with six inventive features centered on hot forging, oxide film removal, and resin coating. Across the independent claims, the inventive concept is structured around the two-step blasting sequence before resin coating and the constraint that the second projection material has a larger diameter than the first projection material.
Hot forging with an applied release agent for ultrasonic vibration transmission
Applying a release agent between a surface of a base material and a die for hot forging, and performing hot forging to form the vibration transmission member configured to transmit ultrasonic vibration.
First surface treatment blasting to remove part of oxide film
Performing a first surface treatment to remove a part of an oxide film formed on the surface during hot forging, wherein the first surface treatment is a blasting treatment using a first projection material.
Pickling to remove remainder of oxide film not removed in first surface treatment
Performing pickling to remove at least a part of a remainder of the oxide film not removed in the first surface treatment.
Second surface treatment blasting before resin coating
Performing a second surface treatment after the pickling and before the coating, wherein the second surface treatment is a blasting treatment using a second projection material.
Larger diameter for second projection material than first
A diameter of the second projection material is larger than a diameter of the first projection material.
Assembling the vibration transmission member to a housing main body
Assembling the vibration transmission member to a housing main body in the manufacturing method.
The independent claims focus on manufacturing a vibration transmission member for an ultrasonic treatment tool by hot forging with a release agent, removing oxide film through a first blasting treatment followed by pickling, then performing a second blasting treatment before resin coating, with the second projection material having a larger diameter than the first.
Stated Advantages
Avoids increasing pickling strength so as not to damage a shape.
Improves appearance.
Controls coating adhesion and suppresses coating film formation failure, including coating film peeling.
Documented Applications
Manufacturing a vibration transmission member for an ultrasonic treatment tool, including resin coating and, in one claim, assembling the vibration transmission member to a housing main body.
Use of the manufacturing method to evaluate molybdenum residue amount and coating film formation failure rate, including coating film peeling.
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