Apparatus and method for controlling swing of construction machine

Abstract

Disclosed are an apparatus and method for controlling the swing of a construction machine, which are capable of achieving a preferential boom-up function or a preferential swing function based on a swing angle during the loading work using a complex operation of a boom-up and swing. The method for controlling the swing of a construction machine, comprises: a first step of selecting a preferential boom-up function or a preferential swing function via an external input device; a second step of determining whether to operate a complex operation by an operation signal based on the operation of a boom joystick and a swing joystick; and a third step of variably controlling, if the preferential boom-up function is selected and if it is a complex operation condition, the degree of opening of an electro hydraulic valve for the swing so as to relatively limit the flow that is supplied from a hydraulic pump to a swing motor, and variably controlling, if the preferential swing function is selected and if it is a complex operation condition, the degree of opening of an electro hydraulic valve for the boom so as to relatively limit the flow that is supplied from the hydraulic pump to a boom cylinder.

Description

technical field [0001] The present invention relates to a swing control device and method for a construction machine. More particularly, the present invention relates to a swing control apparatus and method in which a boom lift priority function or a swing can be implemented according to a swing angle during a loading work using a combined operation of boom lift and swing of an excavator. priority function. Background technique [0002] In general, loading work using an excavator is divided into digging work for digging or loading earth and sand, dumping work for loading the excavated earth and sand on a dump truck, and digging work for returning to the work site to excavate the earth and sand again. return job. [0003] The dumping operation is performed so that after the excavation work for excavating the ground is completed, the slewing joystick and the boom joystick are simultaneously manipulated by the user to control the slewing angle of the upper slewing structure a...

AI Technical Summary

Problems solved by technology

In this case, if the flow rate of the hydraulic fluid supplied to the swing motor 2 is relatively reduced due to the fixed orifice 4a formed in the swing control valve 4, there will be a problem that power loss occurs, resulting in fuel reduction in efficiency

[0016] In addition, in the case of performing only the swing operation without performing the combined operation of boom raising and swing, the supply of hydraulic fluid to the swing motor 2 is restricted by the fixed orifice 4a, resulting in continuous power loss

In addition, if dumping work is performed in a work area with a relatively large swing angle, the loading work time will further increase due to the boom lift priority function, deteriorating workability

[0017] At the same time, even in a work area with a relatively small turning angle, when digging mud and sand to perform loading work, and then turning the upper swing structure to position it at the loading position while dumping the excavated material onto the dump truck, the boom will May not lift adequately to load height

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