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US 2020/0061723 A1Published application
Endmill specification design method, cutting condition detecting method, and processing method
AssigneeMitsubishi Heavy Industries, Ltd.
InventorJun ETO
Life of this patent
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Abstract
Provided is an endmill (5). The maximum spindle speed, per one minute, of a main spindle to which the endmill is attached is Smax. The number of teeth of the endmill (5) is N. The outer shape of the endmill (5) is Da. The natural frequency at which vibrations at the end of the endmill (5) reach a maximum level is ω1. ω1 and/or N are set so that when the diameter-direction infeed amount of the endmill (5) is set to Rd: i) ω1×60/N×6<Smax, if Rd is at least 4% of Da; and ii) ω1×60/N×3<Smax, if Rd is less than 4% of Da.
Claims6
An endmill specification design method, comprising:
- setting ω1 and/or N so as to satisfy the following,
- wherein when a maximum spindle speed per one minute of a main spindle having an endmill attached thereto is defined as Smax,
- the number of teeth of the endmill is defined as N,
- an outer shape of the endmill is defined as Da,
- a natural frequency at which a vibration is maximized in a tool tip of the endmill is defined as ω1, and
- a radial depth of cut of the endmill is defined as Rd,
- i) in a case where Rd is equal to or greater than 4% of Da,
- ω1×60/N×6<Smax is satisfied, and
- ii) in a case where Rd is smaller than 4% of Da,
- ω1×60/N×3<Smax is satisfied.
7 more elements
A cutting condition detecting method, comprising:
- setting a rotation speed of a main spindle having an endmill attached thereto so as to satisfy the following,
- wherein when a maximum spindle speed per one minute of the main spindle is defined as Smax,
- the number of teeth of the endmill is defined as N,
- an outer shape of the endmill is defined as Da,
- a natural frequency at which a vibration is maximized in a tool tip of the endmill is defined as ω1, and
- a radial depth of cut of the endmill is defined as Rd,
- i) in a case where Rd is equal to or greater than 4% of Da,
- a range of ω1×60/N×6 to Smax is satisfied, and
- ii) in a case where Rd is smaller than 4% of Da,
- a range of ω1×60/N×3 to Smax is satisfied.
7 more elements
Dependencies are inferred from the claim text.