Advanced Materials Research Vol. 619

Abstract: Various types of communication were used in the factory. And the manufacturing system, machine, normally use GPIB communication due to their efficiency, cost, and high performance. However the GPIB protocol is different type by their manufacturing company. Therefore the system engineers often spend lots of time to setup and initialized their system for GPIB communication. In this paper, we proposed automatic connection module of GPIB communication for manufacturing system in their factory. The module can find their GPIB type and protocol, and access their communication efficiently. It also can reduce the system fault or communication jam when manufacturing system initialized setup process for GPIB and begin to interface between them.

Abstract: In this paper, a research of precision CNC turning center’s spindle is presented. Spring damper elements are used to simulate the supports of dynamic and static hydraulic bearing, and the 3D finite element models of the spindle is built. Based on finite element models of spindle, the static analysis and model analysis are performed, and the static stiffness, natural frequency and modes of vibration are put forward. The strain and stress of spindle is explored, and mode of vibration of spindle under resonance and designed working conditions is contrasted.

Abstract: This paper deals with a control method research and trajectory planning of parallel mechanisms. Control system scheme which is based on PC and motion controller has high openness, high degree of modularization and support for non-linear mapping relationship between operating space and joint space of parallel mechanisms with high flexibility and low cost. PC and NI motion controller and LabVIEW constituted hardware core and software platform of control system, respectively. Hardware technology of control system contained hardware selection, control circuit design and interface technology; software technology of control system developed application programs layer, core control layer and drive functions layer to realize core control functions of finding home, single-step or continuous movement and micro adjustment, which was based on hardware principle. Trajectory has been planned for a typical high speed parallel robot.

Abstract: Performance test for operating mine’s ventilators are generally on-line, hence the test effect mainly depend on a full-prepared anemometry that should find a section where ventilating current is relatively still. While in the condition of on-line test, the only appropriate test site is in the annular contraction section of the leading device; but this section does not have an enough sectional area to fixate Pitot tubes. Therefore, the key to measure the performance of the ventilator is to develop a special equipment to transmit the wind pressure, and replace old Pitot tubes to install in the leading device. This paper introduce the design principle and manufacture method of this independently-developed wind-pressure measuring equipment, meanwhile calibrate the pressure transmission’s effect with standard Pitot tube and put this equipment in practical. After field measurement, the equipment can effectively transmit wind pressure, and its characteristic performance curve tallies with the standard one, therefore attain the final goal of measuring a ventilator’s wind pressure. Furthermore, in different specifications of ventilator, the equipment can adapt itself to different physical dimensions of annular contraction section. All in all, the equipment is scientific, reasonable and easy to be popularized in the mechanical ventilation mines.

Abstract: This paper applies large-scale finite element software ANSYS and the module of LS-DYNA to establish the solid model of bucket teeth, and according to Smoothed Particle Hydrodynamics Method (SPH) establishes the soil constitutive model. Emulating the process that bucket teeth excavate soil of three different grade ruggedness coefficients obtains the stress and statistical value of bucket tooth point; Simulation results show that: the stress concentration of bucket teeth point is more serious. When the ruggedness coefficient is0.6< f <1.0, the corresponding maximum stress is 197 ~ 309MPa, which meets the strength requirement .The damage is caused by the fatigue failure.

Abstract: Mining truck is a large-scale construction machinery,in many open-air mining process, it is the main transportation equipment, By CATIA modeling the mine car engine connecting rod , and use of CATIA's finite element analysis to analyse the linkage structure,calculate the load conditions.

Abstract: Aiming at the frequently fracture happening in the large-scale liner vibrating screen beams, the software of finite-element analysis, ANSYS is used to analyze the modal and harmonic response of the beam structure. The analysis result suggests the danger area where beam is prone to fracture because of fatigue. The improvement scheme of the beam structure is proposed and a theoretical basis is provided for the same type of product design in the future. The failure form of the beam is fatigue failure. The maximum equivalent stress value of the improved beam structure comparing to the original design is decreased obviously, improving the stress state and the fatigue life and reliability of the liner vibrating screen.

Abstract: Taking the ZY5600-16-34 hydraulic support as the research object, using Pro/E software to build its shield beam’s three-dimensional model, and use ANSYS software to take finite element analysis on intensity of the shield beam. Then optimize its structure based on this. Through taking new finite element analysis on the new model, the results show that the optimization design is effective to increase the strength of shield beam's damageable parts, to provide a beneficial reference for the shield beam’s design.

Abstract: This thesis designed a high degree of intelligence charger to solve the Lead-acid batteries’ problems. The design of charger including two parts, hardware design and software design. PIC16F877 is the core control component in hardware part, on this basis, design the corresponding peripheral circuits .And the designing of hardware circuit and driver software of the whole system is explained in detail.

Abstract: In order to improve the degree of automation of the mine air compressor system, To achieve the remote monitoring and real-time fault diagnosis of the mining air compressors, using Siemens PLC as the data acquisition hardware platform, the host computer using the software of the Kingview and Power Builder9.0 construct the air compressors remote monitoring and fault diagnosis expert system platform, To achieve the remote air compressors parameters real-time acquisition, display, fault diagnosis, as well as remote start and stop the air compressors ,loading and unloading control, while the air compressors room remote real-time monitoring, ensure the security and stability of the air compressors system.