Abstract: The present invention provides an apparatus for cutting a material, comprising: a frame body installed on a conveying path of a material; a cutting means, mounted on the frame body, for cutting an end portion of the material being conveyed; a laser preheating means for preheating the material by irradiating a laser beam onto the material before being conveyed to the cutting means; and a blocking and reflection means for blocking the laser beams reflected to the cutting means and re-reflecting the laser beam to the material.

Abstract: A side trimming device according to an embodiment of the present invention may comprise: a cutting unit for mechanically cutting a transferred steel plate; a groove forming unit for forming a groove in a cutting-scheduled area in front of the cutting unit with reference to the steel plate transfer direction; and a washing unit arranged adjacent to the groove forming unit so as to suction molten material accumulating in the groove in the side direction of the steel plate.

Abstract: A dimension measuring device includes: a rail for moving two sheets of material; a plurality of range finders arranged at a preset interval along a direction of traveling of the material, so as to measure a distance from side surfaces of the material; and an imaging device for taking images between the first and second range finders, which are disposed at the first and second locations with reference to the entry side of the material, respectively.

Abstract: The present invention provides an apparatus for cutting a material, comprising: a frame body installed on a conveying path of a material; a cutting means, mounted on the frame body, for cutting an end portion of the material being conveyed; a laser preheating means for preheating the material by irradiating a laser beam onto the material before being conveyed to the cutting means; and a blocking and reflection means for blocking the laser beams reflected to the cutting means and re-reflecting the laser beam to the material.

Abstract: A side trimming apparatus including a cutting unit which is installed on at least one side of a steel plate being transferred and trims a side of the steel plate by mechanical cutting and a laser processing unit which is installed in front of the cutting unit and emits a laser beam to a portion of the steel plate to be cut to form a groove at the portion to be cut or preheat the portion to be cut, and a side trimming method using the same are provided.

Abstract: The present invention relates to a dimension measuring device and a dimension measuring method, the dimension measuring device comprising: a moving unit for moving two sheets of material; a plurality of range finders installed at a preset interval along the direction of traveling of the material, so as to measure the distance from the side surfaces of the material; and an imaging device installed to take images between the first and second range finders, which are installed at the first and second locations with reference to the entry side of the material, respectively.

Abstract: A side trimming apparatus including a cutting unit which is installed on at least one side of a steel plate being transferred and trims a side of the steel plate by mechanical cutting and a laser processing unit which is installed in front of the cutting unit and emits a laser beam to a portion of the steel plate to be cut to form a groove at the portion to be cut or preheat the portion to be cut, and a side trimming method using the same are provided.