Abstract: Provided is an estimation model generation device configured to generate an estimation model for estimating a lifetime of a tool based on a load curve indicating temporal change or positional change of the load applied to the tool, the tool being used for repeatedly machining a plurality of workpieces in a plate-shape while applying the load to each of the plurality of workpieces, the estimation model generation device including: an information acquisition unit that acquires the load curve at a timing before the tool reaches the end of lifetime due to repeated machining using the tool; an estimation model generation unit that generates, based on load data and a tool lifetime, an estimation model for predicting the lifetime of the tool, the load data being obtained by separating the load curve into a first load curve and a second load curve.

Abstract: Provided is an estimation model generation device configured to generate an estimation model for estimating a lifetime of a tool based on a load curve indicating a temporal change or a positional change of the load applied to the tool, the tool being used for repeatedly machining a plurality of workpieces in a plate-shape while applying the load to each of the plurality of workpieces, the estimation model generation device including: an information acquisition unit that acquires the load curve at a timing before the tool reaches a lifetime due to repeated machining using the tool; an estimation model generation unit that generates, based on the load curve and a tool lifetime, an estimation model for the lifetime of the tool, the tool lifetime being a time period from time of acquiring the load curve to time at which the tool reaches the lifetime; and a storage unit.

Abstract: To provide an iron core and a motor for preventing reduction in motor drive efficiency. An iron core includes laminate section made up of a lamination of plural soft magnetic ribbons, fixed to metal substrate, and provided with winding, and fastening part that pressurizes laminate section in a lamination direction of soft magnetic ribbons. Also, the fastening part is disposed around an opening of through-hole that penetrates laminate section. Furthermore, a metal plate shaped so as not to cover winding section is provided between laminate section and fastening part. Besides, the motor includes a rotor and the iron core.

Abstract: To provide an iron core and a motor for preventing reduction in motor drive efficiency. An iron core includes laminate section made up of a lamination of plural soft magnetic ribbons, fixed to metal substrate, and provided with winding, and fastening part that pressurizes laminate section in a lamination direction of soft magnetic ribbons. Also, the fastening part is disposed around an opening of through-hole that penetrates laminate section. Furthermore, a metal plate shaped so as not to cover winding section is provided between laminate section and fastening part. Besides, the motor includes a rotor and the iron core.

Abstract: The present invention provides a loudspeaker diaphragm and an electrodynamic loudspeaker of an elongated shape being shorter in the minor-axis direction than in the major-axis direction, which have a desirable sound reproducing capability with a high efficiency and are not significantly influenced by divided vibrations of an elongated loudspeaker diaphragm, and which are suitably installed in devices such as display devices.

Abstract: The present invention provides a loudspeaker diaphragm and an electrodynamic loudspeaker of an elongated shape being shorter in the minor-axis direction than in the major-axis direction, which have a desirable sound reproducing capability with a high efficiency and are not significantly influenced by divided vibrations of an elongated loudspeaker diaphragm, and which are suitably installed in devices such as display devices.