scholarly journals Load and Unload Technology to Improve Round-Bale Hauling Efficiency

2021 ◽  
Vol 3 (3) ◽  
pp. 584-604
Author(s):  
John S. Cundiff ◽  
Robert D. Grisso
Keyword(s):  
Cycle Time ◽  
Central Control ◽  
Logistics System ◽  
Delivery Cost ◽  
Mass Load ◽  
Haul Truck ◽  
Central Storage ◽  
Load Mass

There are two key parameters in short-haul truck operations to deliver biomass to a biorefinery: (1) mass of the load and (2) cycle time (load, travel, unload, and return). A plan to optimize both these parameters is outlined in this study. Operation of a logistics system to deliver 20-bale racks to a biorefinery for continuous 24/7 operation, 48 weeks/year is described. Round bales are stored in satellite storage locations (SSLs) by feedstock producers. A truckload consists of two tandem trailers (40, 0.4 Mg bales), a specification that maximizes load mass. Load-out at the SSL (loading bales into racks) is performed by a contractor and paid by the biorefinery. Subsequent hauling (truck tractor to pull the trailers) is also contracted for by the biorefinery. Central control is specified; the “feedstock manager” at the biorefinery decides the order SSLs are loaded out and can route a truck to any SSL where a load is ready. Tandem trailers with empty racks are dropped at the SSL, and the trailers with full racks are towed to the biorefinery. Uncoupling the loading and hauling in this manner reduces the time the truck waits for loading and the SSL load-out waits for a truck; thus, productivity of both operations is increased. At the biorefinery receiving facility, full racks are removed from the trailers and replaced with empty racks. The objective for this transfer is a 10 min unload time, which completes a logistics design that minimizes cycle time. A delivered rack is placed in a rack unloader to supply bales for immediate processing, or it is placed in central storage to supply bales for nighttime and weekend operations. Three biorefinery capacities were studied: 0.5, 1.0, and 1.5 bale/min. The analysis shows that rack cost to supply a biorefinery processing a bale/min for 24/7 operation is ~3.00 USD/Mg of annual biorefinery capacity, and the rack trailer cost is ~3.25 USD/Mg. Total delivery cost, beginning with bales in SSL storage and ending with a rack being placed in an unloader to deliver individual bales for processing, is 31.51, 28.42, and 26.92 USD/Mg for a biorefinery processing rates of 0.5, 1.0, and 1.5 bale/min, respectively.

scholarly journals Determining key performance indicators for warehouse performance measurement – a case study in construction materials warehouse

2018 ◽  
Vol 154 ◽  
pp. 01058
Author(s):  
Elisa Kusrini ◽  
Fadrizal Novendri ◽  
Vembri Noor Helia
Keyword(s):  
Performance Measurement ◽  
Cycle Time ◽  
Performance Indicator ◽  
Peer Group ◽  
Construction Materials ◽  
Order Picking ◽  
Logistics System ◽  
Final Score ◽  
Hierarchy Process

Warehouse performance measurement is needed to improve performance of logistics system. In order to improve warehouse performance, it is necessary to identify Key Performance Indicator (KPI). Different warehouses have different KPI, therefore this research aims to identify the most important KPI of warehouse so that warehouse manager can determine corrective actions in their warehouse efficiently and effectively. In this research, 25 KPI of warehouse are identified in five warehouse activities based on Frazelle model. The most important KPI are then determined in each warehouse activity using Analytical Hierarchy Process (AHP). Warehouse performance are measured and final score is determined using SNORM. Improvement steps are proposed base on benchmarking among warehouses. Warehouse performance measurement is conducted in 5 construction’s material warehouses located in Yogyakarta, Indonesia. From this study, it is found that most important KPI for receiving is productivity (receive per man-hour), KPI for put away is cycle time (put away cycle time), KPI for storage is utilization (% location and cube occupied), KPI for order picking is cycle time (order picking cycle time) and KPI for shipping is productivity (order prepared for shipment per man-hour). Improving warehouse performance could be done by comparing warehouse performance with the best performance among peer group.

scholarly journals Process fluid as a technological system element of vibro-impact parts processing

2021 ◽  
Vol 2131 (2) ◽  
pp. 022026
Author(s):  
G Prokopets ◽  
A Mordovtsev
Keyword(s):  
Complex Parameter ◽  
Technological System ◽  
Flow Process ◽  
Part Quality ◽  
Mass Load ◽  
Load Volume ◽  
Promising Area ◽  
Process Fluid ◽  
Influence Degree ◽  
Load Mass

Abstract Vibro-impact processing refers to finishing processing methods, which largely determine the operational part properties. It is shown that the parameter optimization of the vibro-impact processing is a very promising area of improving the part quality and reducing their manufacturing cost.One of the most important technological system elements is the process fluid. As a result of the priory information analysis, factors that determine the parameters of the vibro-impact processing were identified.Because of theoretical studies, the process fluid parameters and flushing mode influence degree on the process parameters and treated part quality indicators was determined. The process fluid is presented as a set of unit volumes that form an elastically deformable matrix. The necessary list of initial data for determining the maximum allowable process fluid amount in the mass load volume has been identified.The dependence for determining the minimum required process fluid volume is presented. A complex parameter that characterizes the change in the load mass volume in one oscillations cycle, together with the working chamber oscillation frequency and the process fluid fluidity, which determine both the fluid flow process nature (turbulent) and the flow rate inside the load mass is proposed. Based on the complex parameter, the load mass flushing speed is determined. It is shown that at this stage, the numerical value of the parameter can only be determined experimentally. Its theoretical definition is a promising area of further research.

An Improved Delivery Cost Model In Recycling Logistics System

Logistics ◽  
2009 ◽  
Author(s):  
Xiaoqing Geng ◽  
Shuping Wu ◽  
Baoqin Yu ◽  
Xu Zhang
Keyword(s):  
Cost Model ◽  
Logistics System ◽  
Delivery Cost

Nation, Locality and Radical Identity

2018 ◽  
Author(s):  
Malcolm Petrie
Keyword(s):  
Working Class ◽  
Communist Party ◽  
The Political ◽  
Central Control ◽  
Election Campaigns ◽  
Labour Movement ◽  
General Elections ◽  
Political Left ◽  
National Model ◽  
Selection Of

Concentrating upon the years between the 1924 and 1929 general elections, which separated the first and second minority Labour governments, this chapter traces the rise of a modernised, national vision of Labour politics in Scotland. It considers first the reworking of understandings of sovereignty within the Labour movement, as the autonomy enjoyed by provincial trades councils was circumscribed, and notions of Labour as a confederation of working-class bodies, which could in places include the Communist Party, were replaced by a more hierarchical, national model. The electoral consequences of this shift are then considered, as greater central control was exercised over the selection of parliamentary candidates and the conduct of election campaigns. This chapter presents a study of the changing horizons of the political left in inter-war Scotland, analysing the declining importance of locality in the construction of radical political identities.

Design of spline surface vacuum gripper for pick and place robotic arms

2020 ◽  
Vol 4 (2) ◽  
pp. 48-55
Author(s):  
A. S. Jamaludin ◽  
M. N. M. Razali ◽  
N. Jasman ◽  
A. N. A. Ghafar ◽  
M. A. Hadi
Keyword(s):  
Cycle Time ◽  
Industrial Robot ◽  
Annealing Process ◽  
Vacuum Suction ◽  
Robotic Arms ◽  
Custom Made ◽  
Pick And Place ◽  
Manufacturing Procedure ◽  
Production Flexibility ◽  
The Impact

The gripper is the most important part in an industrial robot. It is related with the environment around the robot. Today, the industrial robot grippers have to be tuned and custom made for each application by engineers, by searching to get the desired repeatability and behaviour. Vacuum suction is one of the grippers in Watch Case Press Production (WCPP) and a mechanism to improve the efficiency of the manufacturing procedure. Pick and place are the important process for the annealing process. Thus, by implementing vacuum suction gripper, the process of pick and place can be improved. The purpose of vacuum gripper other than design vacuum suction mechanism is to compare the effectiveness of vacuum suction gripper with the conventional pick and place gripper. Vacuum suction gripper is a mechanism to transport part and which later sequencing, eliminating and reducing the activities required to complete the process. Throughout this study, the process pick and place became more effective, the impact on the production of annealing process is faster. The vacuum suction gripper can pick all part at the production which will lower the loss of the productivity. In conclusion, vacuum suction gripper reduces the cycle time about 20%. Vacuum suction gripper can help lower the cycle time of a machine and allow more frequent process in order to increase the production flexibility.

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