Hitachi Construction Machinery Co., Ltd.

Yuusuke Suzuki

Hiroshi Sakamoto

Hiroaki Tanaka

Hisami Nakano

Takaaki Chiba

A work machine includes a controller that executes a semi-automatic control to correct an operation amount indicated by an instruction given by operation devices. The controller is configured to make a compaction determination to determine whether or not a bottom surface of a bucket is being pressed against a ground; and to further correct an operation amount having been corrected by the semi-automatic control, such that a force that the bucket applies to the ground increases if the bottom surface of the bucket is determined as being pressed against the ground.

Compaction control of work machine

A work machine capable of assisting in an operator's operation to allow a work tool move along a design surface indicating a target shape of an object to be worked irrespectively of an angle of the design surface and a posture of a work implement is provided. A controller determines an excavation actuator in charge of an excavation action and determines an alignment actuator in charge of an alignment action for a work tool out of a plurality of actuators on the basis of the design surface set by a work execution target setting device and the posture of the work implement measured by a work implement posture/position measurement device, determines a target velocity of the excavation actuator on the basis of operation signals outputted from an operation device, and limits a target velocity of the alignment actuator in a direction in which the work tool approaches the design surface.

Work machine

To provide a work machine that can maintain the construction precision of semi-automatic control irrespective of excavation depths and differences in soil nature. A controller acquires soil-nature information on the basis of an operation command given to a work implement, a bucket-claw-tip position outputted from a bucket-position measuring device, and a drive load of the work implement outputted from a load measuring device; generates a soil-nature map on the basis of the bucket-claw-tip position, and the soil-nature information; calculates an estimated load that is an estimate of an excavation load on the basis of the soil-nature map and a bucket-claw-tip target position; and corrects the operation command in accordance with the estimated load.

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Tsuchiura, Japan

Yuusuke Suzuki