[비즈월드] ‘Construction robots’, seen only in games like StarCraft, are active in real construction sites. Construction robots have the ability to constantly perform sophisticated tasks, and at the same time they are responsible for the safety of workers by replacing dangerous tasks. The construction industry is working hard on technology development and patent registration to introduce construction robots with various advantages. Bizworld presents construction robot patents in the construction industry. [편집자 주]
Hyundai Engineering (CEO Hong Hyeon-seong) has developed and acquired a patent for ‘3D robot molding technology’ which can produce atypical sculptures with robots easily, quickly and firmly.
As a result of Bizworld’s confirmation through the patent information search service Keyfrees on the 28th, Hyundai Engineering’s ‘Method for Manufacturing Irregular Concrete Sculptures Using 3D Robot Forming Technology’ was applied in March 2020 (Application No. 1020200030494) and the same was found in September of that year, it was registered as a patent (Registration Number 102161279).
Recently, with the development of construction technology, atypical sculptures with various designs are increasing. Irregular sculptures are mainly placed in outdoor spaces such as parks for display purposes, and as much as they are exposed to the outside, there is a risk of cracking and damage.
Hyundai Engineering’s ‘3D Robot Forming Technology’ is a technology that can produce atypical sculptures with complex shapes easily, quickly and reliably.
It saves time and money by manufacturing the formwork directly with a robot without prototyping the sculpture. Because it is produced by robots, there is little chance of error and complex shapes can be produced with precision. The reinforcing material is placed inside the sculpture, so there is little risk of corrosion. Because the concrete is poured with the reinforcement placed inside the formwork, the overall strength and crack resistance are also improved.
The production stage is divided into ▲ forming stage ▲ reinforcement production stage ▲ concrete casting stage ▲ formwork surface treatment ▲ UHPC casting stage.
The formwork manufacturing step is performed by the first robot. Based on the 3D drawing, the first robot produces formwork for concrete to be poured using a robot arm and various instruments. In this device, the formwork is made of expanded polystyrene (EPS), but the material can be changed. It is produced by coarsening the EPS fabric and finishing it by trimming it. The finished product takes a rectangular structure with parallel pipes consisting of detachable blocks.
The reinforcing material manufacturing step is performed by the second robot. In order to reinforce the rigidity of the concrete to be poured into the formwork, a reinforcing member is made to be placed inside. In this device, the reinforcing material is produced in the form of a diamond grid where stainless wires are stuck, but the material can be changed. It is manufactured by melting stainless wire (liquid by melting solid) and additive manufacturing method by arc welding. Irregular sculptures with stiffeners are less likely to break or crack even when placed outside.
The structure of the first robot and the second robot that performs the task are similar. The role of the arm in the robot is taken by the arm. The arm can be rotated 360 degrees and moved linearly in the direction needed to make planks and stiffeners. In addition, torches, feeders, holders, etc. are installed according to the work to be performed.
The formwork surface treatment step is performed by a surface treatment robot. Smooth the inside of the planks before placing the stiffener into the planks. Urea / urethane is used as the surface treatment material, and is a release layer that allows the concrete poured into the formwork to fall well after hardening.
The UHPC pouring step is performed by a robot or a human. Pour concrete into the formwork. As for concrete, UHPC (Ultra-High Performance Concrete) is used, which is optimized to form the shape of the irregular structure to be produced and has durability to the extent that a separate external surface protection agent is not required. The pouring speed is between 0.5 m 3 / hour and 5 m 3 / hour to prevent the concrete from being sealed and the formwork from being damaged.
External formwork can also be installed to fix the formwork before the UHPC casting stage. It is made of strong steel material. The external formwork prevents the sides of the formwork from being widened, damaged, or buoyant due to the weight of the concrete being poured into the formwork.
An official from Hyundai Engineering said, “We developed 3D modeling technology using robots to be a leader in the atypical sculpture market, which has been in increasing demand recently.” I will try,” he said.
[비즈월드=나영찬 기자 / na@bizwnews.com]
