• Title/Summary/Keyword: Concrete Pump Truck

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Implement Semi-Product Commonization Design for Reduction of Inventory : Focusing on Concrete Pump Truck Frame Assemble Process (펌프카 재고 감축을 위한 반제품 공용화 설계 구현 : H사(社) 펌프카 프레임 조립 공정 중심으로)

  • Kim, Kyung-Hun;Park, Chan-Woong
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.43 no.4
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    • pp.142-149
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    • 2020
  • A manufacturing company should produce its products and make a profit to continue its management. With the adoption of a multi-category small-volume production system, manufacturers that produce concrete pump-cine products are carrying out improvement activities to increase their market share amid the business-to-customer business environment. However, the slump in the construction investment environment has led to a decline in sales of concrete pump trucks. The purpose of holding inventory is to prevent loss of sales opportunities with the rate of change in the sales plan, and reducing the rate of change in the product can reduce unnecessary inventory and, in order to realize this, the goal of reducing inventory can be achieved by reviewing the parts that can be designed for common use. Therefore, to reduce the inventory of concrete pump trucks, semi-finished publicization design is necessary. According to the analysis, the frame assembly process of the 32M model is common. Production capacity can be secured without loss of sales opportunity.

Optimizing the Exhaustion of Inventory for Design Changes: Focusing on Concrete Pump Truck Outrigger Process (설계변경 재고 소진 최적화: E사(社) 펌프카 아우트리거 공정 중심으로)

  • Chan-Woong Park
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.45 no.4
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    • pp.174-179
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    • 2022
  • Companies are making design changes by improving product quality and function to succeed while meeting customer requirements continuously. Design changes are changing the product BOM's amount, item, specification, and shape while causing a change in the product's structure. At this time, the problem of inventory exhaustion of parts before design change is a big topic. If the inventory exhaustion fails, the pieces before the design change become unused and are discarded, resulting in a decrease in asset value, and the quality cost of the design change affects the company's profits. Therefore, it is necessary to decide to minimize quality costs while minimizing waste inventory costs at the time of application of design changes. According to the analysis, priorities should be prioritized according to urgency because the quantity of items before the design change affects the applied lead time.

Development of a Concrete Pump Truck's Core Pump Model and Its Validation (콘크리트 펌프트럭의 코어펌프 해석모델개발 및 신뢰성 검토)

  • Park, Sung Su;Noh, Dae Kyung;Lee, Geun Ho;Lee, Dae Hee;Jang, Ju Sup
    • Journal of Drive and Control
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    • v.15 no.2
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    • pp.1-8
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    • 2018
  • This study is a first step toward reducing surge pressure, and it has another purpose, which is to developing an analysis model which can closely analyze a hydraulic circuit and be used in design. For development of analysis model, SimulationX, a commercial program, is used. The study progress methods are as follows. By analyzing the structure and operating mechanisms of each part of the hydraulic system of the pump truck and referring its parameters, develop a single component model. Assemble the developed single component model, and make an overall analysis the model. By comparing the similarities between the developed model and the actual system's test results, validate the reliability of the analysis model.

Concrete pavement monitoring with PPP-BOTDA distributed strain and crack sensors

  • Bao, Yi;Tang, Fujian;Chen, Yizheng;Meng, Weina;Huang, Ying;Chen, Genda
    • Smart Structures and Systems
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    • v.18 no.3
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    • pp.405-423
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    • 2016
  • In this study, the feasibility of using telecommunication single-mode optical fiber (SMF) as a distributed fiber optic strain and crack sensor was evaluated in concrete pavement monitoring. Tensile tests on various sensors indicated that the $SMF-28e^+$ fiber revealed linear elastic behavior to rupture at approximately 26 N load and 2.6% strain. Six full-scale concrete panels were prepared and tested under truck and three-point loads to quantify the performance of sensors with pulse pre-pump Brillouin optical time domain analysis (PPP-BOTDA). The sensors were protected by precast mortar from brutal action during concrete casting. Once air-cured for 2 hours after initial setting, half a mortar cylinder of 12 mm in diameter ensured that the protected sensors remained functional during and after concrete casting. The strains measured from PPP-BOTDA with a sensitivity coefficient of $5.43{\times}10^{-5}GHz/{\mu}{\varepsilon}$ were validated locally by commercial fiber Bragg grating (FBG) sensors. Unlike the point FBG sensors, the distributed PPP-BOTDA sensors can be utilized to effectively locate multiple cracks. Depending on their layout, the distributed sensors can provide one- or two-dimensional strain fields in pavement panels. The width of both micro and major cracks can be linearly related to the peak strain directly measured with the distributed fiber optic sensor.

Development of a New Process for Welding a WC Layer to the Round Surface of a Plain Carbon Steel (초경접합 신공법 개발)

  • 박우진;김기열;이범주;조정환;박채규
    • Proceedings of the Korean Society of Tribologists and Lubrication Engineers Conference
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    • 1999.11a
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    • pp.257-262
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    • 1999
  • The economic loss arisen from the abrasion wear have been increasing at every industrial field. To reduce the economic loss we developed a new process, which is named MAHa process(Metallic Adhesives for HArdening). MAHa process is a process to weld tungsten carbide(WC) to the surface of a plain carbon steel so that it may stay longer under the severe abrasive environment. The depth of the WC layer ranges from 0.5 mm to 5 m. Compared with the conventional technology, arc-augmented welding which bonds WC on the flat surface only, MAHa process has the merits that it can make a robust WC layer on the round or wave- shaped surface also. How to turn the WC powder into a flexible mat is the key technology of the MAHa process. We invented new polymer materials to accomplish such a goal and both the MAHa process and the invented materials were applied for patents. For the application, the inner wall of elbow of Concrete Pump Truck(CPT) was maharized(MAHa process-treated) and the new WC layer on the inner wall was made successfully. The elbow was equipped to a CPT.

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