Advanced Materials Research Vol. 619

Abstract: A remote control robot system is designed, and the operator uses the remote control radio transmitter module for remote operation, and after the radio receiver module receiving the signal, it can control the movements of the robot by the PLC instructions. The software system used STEP 7 Micro WIN SP6 as development platform to prepare the software program, and designed the robot hardware with the use of electronic circuit knowledge. The results show that the remote robot system is successful, and it can complete a variety of actions according to requires.

Abstract: A teaching robot with three degree of freedom is designed. The three degrees of freedom are: waist rotation, lifting and stretching of the arm and opening and closing of the gripper. The designs of the main components are: a mobile chassis, parallel rails, horizontal rails and manipulator. The teaching robot designed has the features of low cost, easy to regulation, good repeatability and it has good promotion and application prospects in the field of teaching.

Abstract: The automatic design of hull block assembly process is a difficult point in the study of CAPP assembly, which will influence the construction period and quality in shipbuilding negatively. This paper presents a new design of determination system of assembly units for block module assembly. Thus, based on fuzzy clustering analysis, the assembly model is built and the method to analyze the partition of assembly units is given out. The result shows that the system is reasonable and feasible, which will be significant for the production of ship module.

Abstract: Under the comprehensive consideration of “buoyancy effect” and “throttle effect” during mine fire period, the article used the geographic information system (GIS) technology, simulated the smoke pollution area, ventilation system junction temperature and state of airflow during mine fire period. Finishing a program for dynamic simulation of emergency rescue during mine fire period, which is significant for establishing fire pre-scheme and the decision-making during fire period. At the same time, the dynamic characteristic of ventilation system and selection of escaping route is also considered, which provides foundation for the rescuing the workers underground in time.

Abstract: In steeply dipping working face rock movement, failure characteristics and distribution law of abutment pressure obviously affects seam mining. This paper takes the long wall for large inclined angle fully mechanized face of coal mine as the project background. The theoretical analysis and numerical simulation are adopted to study the break mechanism of the rock layer in steeply dipping seam mining; Through the numerical simulation results shows that the basic features are obtained, which are the biggest stress coefficient, abutment pressure of plastic area, roof weighting step，and convergence between roof and floor in working face．Based on the pressure appearance of the steeply dipping seam mining, control technology is given for the working face support stability, the work equipment prevent tumble and glide，and adjacent rock in the period of pressure. The study has a practice meaning in reducing coal mining accidents and improving the safety in steeply dipping seam mining.

Abstract: The mechanical characteristics of the end plates of Lebus drum were investigated by an experimental approach. Strain-electricity method was used to test the stress of the end plates of the drum. Experimental results show that the equivalent stress exerted on the end plate is 3 time higher than the stress obtained by the conventional calculation method. The stress exerted on the end plate of one side of Lebus drum grows one time as the wire rope adds two layers according to the winding process and the increment of the stress becomes larger and larger with the wire rope layer number increasing. When the wire rope rise from the 10th layer to 11th layer, the increment of the stress in radial direction on the end plate of the entry side reaches up to 54.9 [Mpa].

Abstract: In modular design of product, seeking the optimal matching module and realize the optimal combination of product configuration is very important. This paper analyzes the module selection strategy in modular design of CNC machine tool, give the module selection algorithm. Relevant theory of fuzzy similarity optimal ratio is introduced on the search for the optimal matching module, and module selection system is developed by MATLAB. Finally, through an example, prove the effectiveness of the proposed algorithm and convenience of module selection system.

Abstract: Stuck-point calculation (SPC) is an important method to determine the stuck position of the drill string. It is of practical significance to explore and promote the SPC application in the field of mineral exploration. While Hooke's law is the foundation for the mathematical modeling, drill site conditions such as ground formation, borehole design and drilling process will be defining the factors and parameters in the formula. In recent years, the use of advanced full-hydraulic core drills provides a convenient means of on-site operation for stuck-point calculation. In this paper, the experimental operation at a deep-hole complex-formation drilling project in Yunnan Province, Southwest China, verifies that the SPC method is effective and conductive for mineral exploration core drilling activities.

Abstract: In order to analyze deformation and stress state of round link chain which it is generated by instant impact for sudden loading between the chains during the working condition, the method of symmetric penalty function was adopted to analyze contact between round link chains; and the finite element software ANSYS LS-DYNA was further used to carry on nonlinear contact analysis, the displacement curves , the stress and deformation with time were gained during the process of impact by simulating the process of the instant impact of chains. The results show that it is circular to the contact area of round link chains and it is the main reasons of damage that the greater stress and deformation of impact is caused when time lasts 0.05s through theoretical analysis and finite element analysis software. The theory equations of load conditions and the method of finite elements can provide a theoretical basis and simulation methods for analyzing the round link chain driving in a variety of different working conditions under the conditions of impact.

Abstract: This article analyzed the finite element on horizontal centrifuge of VM1400, established finite element model of the corresponding parts and gave the vibration modes of the various movements. Through the stress, strain, displacement calculation and modal analysis of the various components, the conclusions include that the level 1 of the vibrating body and the secondary vibrating body do the regular axial horizontal linear reciprocating motion, there is relative displacement between the two bodies, and the vibration frequency is close to the operating frequency.