Jui Chang Lin

Development of automatic regrinding program for PC-based tool grinding machine

The main goal of this development is the PC-based controller setup on the CM2 tool grinding machine. Concerned cutting parameters with know-hows can be transferred to a useful program and then embedded in the PC-based controller. By automatic positioning of probes the automatic procedure can be achieved. An automatic and intelligent PC-based grinding machine for regrinding has been developed in this investigation. With the new machine and automatic procedure, regrinding process will be distinctly simplified. Based on a manual grinding machine CM2, a PC-based controller is integrated in the machine. The know-hows of the regrinding technology have been integrated with a self-developed program. For automatic dimensional inspection a contact probe is utilized as inspection sensor. By the programming and automatic dimensional inspection, the functions of tool regrinding machine have been enhanced greatly.

Motion-curve synthesis and geometric design of globoidal cam mechanism with intermittent variable speed

Abstract A design procedure for increasing the performance of an intermittent globoidal cam mechanism is presented. The proposed procedure is based on the synthesis of roller-follower turret motions at two different speeds to lower the inertia effect caused by the start/stop behaviour of the intermittent mechanism. The motion curves in a globoidal cam mechanism with an intermittent variable speed are defined by non-parametric rational B-splines to increase the transport capability. There are four key techniques to design a cam mechanism: the first is to construct the cam profile by using the volume swept method, the second is to synthesize the motion curve of a turret by using a rational B-spline curve on velocity control, the third is to analyse the mechanical properties of cam by using the geometrical vector method, and the last is to plan an NC programme and to estimate the performance of five-axial precision machining. Four types of motion curves with similar geometric properties are used and the rational B-spline has better dynamic properties than the other three curves. The systematic design approach proposed for a globoidal cam mechanism with an intermittent variable speed is to improve its performance, to upgrade effectively the function of the indexing device, and to increase the production speed of industrial automatic conveyance.

A Study of Process Parameter Optimization for Passive Component Precision Extrusion

Chips scraping each other during transportation, and chips coming into contact with water or air will cause oxidization resulting in poor quality products. The chips need to be well packed and to be protected from the environment. The method of Surface Mount Component (SMC) packing using plastic carrier tape can reduce chip damage. This study focuses on the extrusion process parameters optimization of plastic carrier tape. Because each extrusion process produces 270 pieces of carrier tape, the tape size is 1.35mmX2.25mmX1.35mm and is extremely difficult to reach the tolerance standard. This study utilized a practical test to explore various factors on the quality of the carrier tape, such as the rotational speed of extruder screw motor and extrusion mold; the negative pressure of extrusion mold; and the temperature of the extrusion mold. These experiments could find out an optimal extrusion process.

Investigating the Typical Affective Meanings Influencing Interactivity of Interactive Products for Chinese-Speaking Users

The purpose of this paper was to find out the typical affective meanings for interactive products for Chinese-speaking users. The affective meanings are affective adjectives evoked from interactive products. They are used to investigate the structure of emotional responses to objects, or applied to Kansei engineering to establish the connection between physical property spaces and semantic spaces. However, the affective meanings used in previous studies including the structure of emotional responses and Kansei Engineering were varied both in number and adjectives they used. Over 628 adjectives collected from studies related to emotional responses and Kansei Engineering, and websites were condensed into 298 adjective pairs by five Chinese teachers teaching at Junior high schools in Taiwan. Semantic differential approaches were used to rate 16 windows media player skins with these adjective pairs. Furthermore, Item analysis was used to remove the affective meanings with low discrimination. Factor analysis was performed to reduce the number of affective meanings by discovering the words with similar response patterns. The outcomes showed forty-two typical affective meanings which represented the main factors after Factor analysis. These typical affective meanings were suggested as the affective meanings to describe interactive products.

The Dimension Accuracy Analysis of a Vacuum Forming Mold for IC Packing Bag

This article is pointed to the dimension accuracy analysis of the vacuum forming mold for plastic carrier tape. The dimension accuracy of the vacuum forming mold was decided by the dimension specification of the plastic carrier tape. After detail design of the parts which would be manufactured and assembled. The accuracy and performance of the mold had been tested subsequently. The dimension accuracy of the mold was conducted by the accuracy of the plastic carrier tape. Variation of dimensional accuracy of the plastic carrier tape was inspected to evaluate the performance of the vacuum forming mold. Mean and variance test was conducted under the significance level of α = 0.05.Through series of inspections, all the plastic carrier tape met the specification of dimension accuracy which indicated that the precision and performance of the developed vacuum forming mold also met the requirement.

Micro-Anode Guided Electroplating (MAGE) Control System

This article releases the details of the equipment development for the micro-anode guided electroplating MAGE fabrication. The microstepping architecture, electroplating power source, control system architecture, measurement system, man machine interface and the control prodedure will be described. Metallic columns around 100 micrometers in diameter were fabricated up to 2cm long with this equipment to demonstrate its performance. An innovative intermittent MAGE mode is supported by this equipment so that it can produce micro columns of finer surface morphology and better circumferential uniformity than the conventional continuous electroplating.

Using XXY Table to Construct a Verticality Calibrator and its Error Analysis

In this work, according to the characteristics of analytes, using XXY table and angular displacement tables to construct an automatic verticality measurement and correction system for three axes. For the purpose of measuring and correcting the spatial verticality of analytes in three axial directions, in this study, using a XXY table and angular displacement tables to set up a simulate carrier, these tables are driven by a four axes motion controller to adjust their posture, and then utilizing five laser displacement meters and self-developed signal processing program to carry out the measurement work. The system sets five laser displacement sensors in the surroundings of analytes respectively, and using the measured data by laser displacement sensors to calculate the yaw, pitch and roll angles of the analytes. Finally, by the four axes motion controller to adjust the motion of these tables, let laser light perpendicular to the surface of analytes as far as possible to achieve the goal of this system. After the experimental verification, the average error is not more than 0.0417 degrees.

Environment Supervisory Control of Computer Room Based on Android Device

This research designs environment supervisory control system of computer room which consists of multiple Android environment controllers and one supervisory control server. An Android environment controller is a controller based on Android device. The controller contains an Android device, a Wi-Fi wireless access point, a switch hut (or NAT) and three data acquisition modules. The Android device enters TCP/IP LAN through the Wi-Fi access point. The data acquisition modules with TCP/IP interface are plugged into the LAN, and read/written by the Android device with Modbus TCP/IP protocol. Control logics are designed for computer room environment control. The controller monitors air conditioning systems, room temperature and humidity, fire alarm systems, uninterruptible power supply (UPS) systems, electricity supply systems, leak detections, and door access control systems. If something happens, it can drive buzzer, alarm, voice dialing, or air conditioning, send SMS, voice mail, record audio, or video. A supervisory control server is used to help remote controls of all Android environment controllers. All Android controllers send their operation data to the server. Authorized user can login to the server to monitor and control certain Android controller with a browser or Android device.

A Study of Micro Injection for Unibody Array LED Lampshade with Multi-Cavities

The unibody of LED lampshade is the expansion of a lampshade array from single-LED in order to decrease assembly time, the forming technique is complicated. This study employ solid model to build micro mold, and find out the optimal design parameters, such as gate position, running system, cooling system and holding pressure system. The improvement of gate system can reach flowing equilibrium when molten plastic flows into cavity, and no welding line is produced. In the cooling stage, the cooling speed at each cavity is also steady and balance in order to reduce residual stress and lens defects. This study utilizes multi-gate system and multi-stage holding pressure aided forming to decrease welding line and residual stress. This study improves traditional mold design to fit more multi-cavity LED mold design which includes cooling system redesigning, cavities layout, flowing balance in runner and reducing shear stress. The Taguchi method and orthogonal array are used in the study for each group of experiment; many factors are applied to obtain the minimum shear stress, minimum warp, reduction of flow mark and uniform stress distribution. The results can provide for industry reference.

Strength Analysis and Safety Design of Baby Car Seat

After the automobile made an emergency brake or bumped by accident, the baby car seat will be deformed and cracked by great force, the baby car seat have became a very important topic for years. This study focuses on analyzing the state of baby car seat after receiving forces, propose the improvement of structure strength and safety factors, enhance the structural strength of baby car seat and improve collision resistance. The internal skeleton was a backbone of baby car seat structural design, this research utilized simulation that combined CAD software (Pro-E) with finite element analysis software (Ansys\Workbench) to analyze the bumping situation, the high-speed camera was also applied to record the bumping situation of baby car seat. The comparison between these two results was used to design the skeleton within safety seat in order to approach the anticipative structure strength. Therefore, structure analysis will enable baby car seat to reach a high level of collision resistance.