Abstract: Recently, transporting coal in the coal mine is poor efficiency and too costly. Coal mine underground horizontal extension transfer machine is used to transport coal faster and better. To resolve the problem how to connect the scraper conveyer with tramcar in this system, the design of the bracket has been brought up. The bracket of scraper part is the main bearing of coal mine underground horizontal extension transfer machine, and all the scraper conveyer must be fixed in the bracket. In addition, the design of the bracket of scraper part not only considers the rationality in the structure, but also considers the effect of the environment. The system works in extreme circumstances, but the green design can resolve it. It can effectively combine the choice of material, the structure of the bracket, the methods of technology with exterior styling, reflecting the human, machine of harmony with the working environment.
Abstract: The stacking robot is the main equipment in the automated high-rise warehouse.It plays an important role in the automated high-rise warehouse. Column is a major component of the stacking robot. Its performance has a direct impact on the overall performance of the stacking robot. In this paper, combining with the actual work situation of the stacking robot, we use finite element software Ansys Workbench to analyze the column of the small dual fork stacking robot in structural mechanics.Based on the analysis,we can find its weakness and improve.It provide a theoretical basis for the actual manufacturing of small dual fork stacking robot. At the same time, it also provides an effective design and analysis methods for the manufacture of the other parts of the small dual fork stacking robot.
Abstract: To support rapid design of longitudinal roadheader’s cutting unit better, an approach for product variant design based on parametric modeling was presented. According to the function and structure of longitudinal roadheader’s cutting unit, this paper partitioned the function modules of cutting unit and analyzed its parametric models by using theory and key technologies of variant design method. On the basis of the existing 3D models, variant design of geometry shape features, main parts and assemblies of longitudinal roadheader’s cutting unit had implemented through re-development on Computer-Aided Design platform. It proves that the variant design method can accelerate product design process, reduce costs for product design and ensure the quality of product design. And the instantiation could be as a reference of similar product’s rapid design.
Abstract: At present, the flange drawing part with bottom hole is produced by at least 2 sets of dies and not qualifies for modern manufacture concept. In this paper, a compound die is designed which the flange drawing part can be blanked, drew, punched and trimmed in the same forming-position. The die is made of tow convex and concave dies, one drawing female die, one punching die, one blanking female die and one trimming punch. One of the convex and concave is used to blanking, the blank is drew by drawing female die and the other convex and concave, the punching die is applied to punch the bottom hole, the edge of blank is cut by trimming punch. Beside, the key design points and working process of the compound die were discussed as well.
Abstract: Airfoil design is essential for civil aircraft. A multi-point method is presented in this article to improve the aerodynamic performance of airfoil over a range of the flight envelope. This method combines computational fluid dynamics and numerical optimization. It comprises of three phases: 1) Airfoil shape parameterization method to develop candidate shapes. 2) Flow solver validation to calculate aerodynamic forces. 3) Searching for the optimized airfoil shape using the genetic algorithm. The major limitation of single-point design is the poor off-design performance. By basing the objective on a combination of the drag at three design points, the resulting overall performance can be improved with respect to the single-point result.
Abstract: With the development of MEMS devices, the design requirements to MEMS devices are more and more high. Computer Aided design of MEMS devices have been from the simple structure, fabrication process design to the development of the system design. The corresponding design pattern originally used to be to function and performance, which is called Bottom-Up, is developing to such a pattern named Top-Down to meet demands as the final purpose, and it is more reasonable. According to the current situation of MEMS technology, this paper presents a timely system design method of micro devices based on Top-Down, and further discuss the design process of Top-Down of micro devices.
Abstract: Reliability as an important index occupies an important position in electronic time fuze design. Small and medium caliber ammunition could be set in wire form or wireless form. Wireless setting can be divided into several forms, electromagnetism induction setting, radio frequency setting, laser setting and so on. There are many existing disadvantages in this technique, such as weak EMI ability, complex structure and poor reliability, while wire setting has the advantages opposite them. A wire setting system for electronic time fuse was designed in this article. In allusion to the problems of low ammunition reliability in the experiment, a method that could detect the working condition of the fuze effectively is presented, and bring a great help for finding out the root of the poor reliability. The experimental results showed that the effective rate of the improved electronic time fuze reached 100% and timing accuracy reached +-3 ms. This study provides a reference for the design of the reliability of setting system.
Abstract: Pin tumbler lock is widely used due to its important role in security. However, the existing pin tumbler locks are not safe enough as they can be easily opened by many specific tools. Although many pin tumbler lock patents have been proposed to enhance the security level, these revealed designs still exhibit different deficiencies. In addition, the traditional method for lock designing is of low efficiency as it is based on inspiration and experience. Therefore, the TRIZ tool, which is the inventive problem solving method, is applied to lock designing in this paper. An innovative design of magnetic pin tumbler lock has been proposed through analyzing the traditional pin tumbler lock system, finding contradictions and solving them by using TRIZ tools such as separation principle, inventive principle, contradiction matrix and substances - field analysis. The proposed magnetic pin tumbler lock is double encoded and can effectively prevent specific tools from opening.
Abstract: With the help of IGES standard file which was the exchange specification of initial graphics, different CAD system could change the data of product by neutral file’s format conversing. The automatic generation of 3D-Model curve surface in the MCNP input file was realized by using VC++ language.This method has solved the problem of the complication of MCNP geometric modeling process and the 3D-Model input problem in the MCNP. The input of MCNP was transferred the application problem of CAD/CAM software. The data and figure of varies software could be shared and converted. The work of design could be simple, the process of design could be speeded up and the cycle of design was shorted. Work efficiency and practicability were improved. If precision was controlled in 3D-Model, the result could be expected by contrast.
Abstract: The Horizontal Type Transfer Machine for Underground Coal Mine has a simple controlling surface, compact structure and the low cost of making. It also could continuous loading of small underground loader. The paper mainly presents that the design of horizontal type transfer machine for underground coal mine belt department. It points out the structure and working principle of Transfer Machine and that also provide theoretical and technical support for the transfer machine’s continuous operation. This article multi-disciplinary considers the manufacturing technology, structural optimization and the economic running. It also consider of the machine’s reduce, reuse and recycle.