Applied Mechanics and Materials Vols. 16-19

Abstract: CBR (Case-based reasoning) technique is increasingly applied in the process planning and dies intelligent design for stamping parts. In these applications, stamping parts information acts as the problem domain of cases model, while stamping process and die information as the answer domain. The similarity computation and retrieval of stamping parts are essential to the case-based design of stamping process planning and dies. In this paper, that issue is studied targeting automotive panel as the research object, and a retrieval method for similar panel parts based on the automobile panel coding is proposed. The coding structure is designed considering the automobile panel's features, especially the geometry shape features and their relationship. And the corresponding similarity calculation method is put forward. Finally, a case study is used to reveal the effectiveness of this methodology.

Abstract: The characteristic of Instant Customerization (IC) and its job-shop scheduling problem is described. The customer requirements were divided into static forecasting and dynamic forecasting aiming at IC, that is common requirement forecasting and individualized requirement forecasting. According to the characteristics of the problem, the job shop scheduling part of the system is then programmed with an algorithm, PSO. Simulation results showed that requirement forecasting can provide an excellent delivery date to adapt to the IC job-shop problem.

Abstract: A 3-TPS(RRR) hybrid machine tool that could process vertically as well as horizontally was designed in Northeastern University. A parallel locking mechanism, equipped between the moving platform and the fixed base, is used to constrain partial degrees of freedom (DOF) of the platform. It leads that the platform has three translational DOF and a rotate DOF. The kinematic analysis was discussed in this paper. Several important issues were addressed, namely, position, velocity, acceleration, Jacobian matrix. A simulation was also carried out, which lay the base on structural design and dynamic analysis.

Abstract: Auto shock absorbers, with helical surfaces together with multiple punching procedures needed in manufacturing processes, make the measurement and inspection difficult. TieNiu 3DOMS is adopted to acquire their surface data, the digital point cloud data of one single vision within 10s, automatically registering complete point cloud by rotary platform, so that the efficiency of process inspection and final quality control of the work pieces of complicated surfaces are improved. Experiments show that the surface inspection precision is better than 0.05mm, and one single surface inspection within minutes.

Abstract: An experimental setup was established to measure and study the vertical and horizontal force components acted on the saw-blade during the whole deep sawing process of a granite workpiece with finite length. The accumulated thickness of the grits engaging with the workpiece in the sawing zone was obtained by numeric method to simulate the vertical and horizontal cutting forces respectively. The results showed that the simulated data tallied well with the measured data.

Abstract: To cope with the challenges of monitoring dynamic and variable quality variation into supply chain, diagnosing the abnormal variation at the right moment, is a difficult problem that a enterprise in supply chain faces in process quality control. A dynamic process quality control method, which integrated quality prevention, analysis and diagnosis, was all put forward. This method integrated several enabling technologies such as the theory of similarity manufacturing, Statistical Process Control (SPC), neural network. Furthermore, some key enabling technologies were studied in detail, including process quality analysis on-line based on similarity process and process quality diagnosis based on Elman. It is basis of realizing network, intelligent and automatic process quality control.

Abstract: A 3-DOF in-parallel machine tools based on a tripod mechanism is developed and studied, the kinematic is analytically performed, the workspace is derived, Analysis of the a number of conditions of the Jacobian matrix and manipulability is carried, The manipulability analytical of the parallel machine tool is investigated

Abstract: In the course of network supported collaborative design, the data processing plays a very vital role. Much effort has been conducted in this area and many kinds of approaches have been proposed. Based on the correlative materials, this paper presents XML –based strategy for several important problems of data processing, such as the representation of STEP with XML in the product information expression and the management of XML documents using relation database. Finally the structure of data processing system based on XML is presented.

Abstract: In the modern production and management of the supply chain, the supplier management(SM) becomes one important researching field. The paper tried to utilize the thinking and methodology of Lean Six Sigma to solve the supplier managing problems. Lean Six Sigma is a new advanced production technique management instrument which integrates Lean production and Six Sigma. It focuses on the subtle production and the strategic management simultaneously. It not only pays close attention to the speed and time of manufacture, but also follows with interest in the fluctuation in process. Lean six sigma supplier surveillance process management includes system, process and product audit. In this paper an example about payment and delivery is used to prove this way is very practically and effectively.

Abstract: The paper implements numeric computation to analyze free vibration characteristics of rotating blade by the means of finite element method. The effects of rotate speed and temperature on the resonant frequency of blades are considered. The static frequency and the dynamic frequency under working speed for the room temperature and working temperature are calculated, and the various modes are obtained. The resonance analysis is given by Campbell graph in which shows the distribution of resonant points for resonant frequency and rotate speed under the different excitation.