Yamamoto Metal Technos Co., Ltd.

Masafumi Araki

Kengo Yamamoto

Shigeru Nakayama

Koji Murakami

Masatoshi Enomoto

Ryoga Shiotsu

Taizoh Yamamoto

Takayuki Yamanouchi

Ryo Matsuda

Provided a vibration measurement device for a rotary tool held by a tool holder that is coupled with a spindle and axially rotates in cooperation with the spindle. The vibration measurement device includes: a pair of acceleration sensors attached to a horizontal plane with respect to a rotary axis of a rotary tool in a manner symmetric to the rotary axis; an amplifier circuit that matches impedance of acceleration information from the acceleration sensors and amplifies voltage; a low-pass filter that removes predetermined high frequencies from an output signal of the amplifier circuit; and a subtraction circuit and an addition circuit that output a parallel vibration signal in an XY direction and a vibration signal in a rotational direction, respectively, from the output signal of the low pass filter.

Vibration measurement device

An objective of the present invention is to provide a friction stir welding device with which the temperature in the proximity of a weld part on a member to be welded can be intermittently measured by enabling the temperature of a plurality of sites in a rotary tool () used for friction stir welding to be ascertained in real-time when welding. This rotary tool () for a friction stir welding device comprises: a hollow channel () that extends from the upper end of a shoulder part () to the proximity of the lower end of a probe (), and that is on substantially the same axis as the axis of rotation of the shoulder part (); and a hollow, outer periphery channel () that is apart from the axis of rotation of the shoulder part () in the radial direction and in proximity of the outer periphery of the shoulder part (), and that extends from the upper end of the shoulder part to the proximity of the lower end thereof. A temperature measurement element () is respectively disposed in the proximity of the lower end of the hollow channel and of the outer periphery channel.

Friction stir welding device, and rotary tool used for friction stir welding

In order to evaluate the cooling performance of cutting oil, cooling water, and the like more accurately than conventional means, there are provided a temperature measurement method and a temperature measurement device that can actually ascertain the temperature of a rotating tool such as a cutting tool during cutting or welding torch during welding in real time. The temperature measurement method uses a rotating holder that is rotatable around a rotating axis and has a hollow hole extending from a front end to a rear end along the rotating axis, and a rotating tool that is connected to the rotating holder and has a coaxial through hole with the hollow hole. In the temperature measurement method, a step of attaching a temperature measurement unit near the through hole of the rotating tool, a step of measuring the temperature of the rotating tool that rotates coaxially with the rotating holder using the temperature measurement unit, and a step of receiving a measurement result of the temperature measurement unit by an electronic substrate are performed in this order.

Temperature measurement method, and temperature measurement device

Growing community of inventors

Osaka, Japan

Masafumi Araki