Papers by Author: Zi Qiang Zhang

Abstract: By surveying SCARA manipulator in the market, the question that the overall length of arms is fixed, which leads its operating range to be relatively fixed, and the manipulator has badly adaptive can be found. Aiming at the problem, a SCARA manipulator whose arms can be replaced quickly had been designed according to the concept of adaptable design, and the principle of replacement arms had been put forward basing on the analysis to the minimum operating radius of manipulator in this paper. Moreover, an adaptable interface for replacing quickly different grippers during the process of production had been designed in the paper.

Abstract: Aiming at there are multifarious small shaft and sleeve subassemblies, in which shape and quantity of parts are different, the adaptable design concept was applied to the design of auto assembly machine product platform for small shaft and sleeve subassemblies. According to the general structure design and the module partition for the product platform, a parameterized design method that the number of stations is the main parameter was proposed. And the parameterized product platform, which can be suitable for the automatic assembling of multifarious small shaft and sleeve subassemblies and can be upgraded, was founded. Thus, the universality of the product platform is improved, and the product design cycle is shortened.

Abstract: The auto assembly machine adaptable product platforms for small shaft and sleeve subassemblies are multi-stations parameterized product platform that use the number of stations as the main parameter. A parameterized design system for the product platforms is established, and the development process is introduced in detail in this paper. In using the system, only needs to input the main parameter, the design of the product platforms can be realized, 3D model drawings of parts, 3D assembly drawing and engineering drawings, which we need, can be generated quickly. Thus, the product design cycle is shortened, and the design efficiency is improved. With broad applications value, the way can be extended to the design of similar product platform.

Abstract: In order to perform adaptability comprehensive evaluation of auto assembly machine product platform for small shaft and sleeve subassemblies, with product family-oriented design, more reasonably and effectively, a fuzzy comprehensive evaluation method based on fuzzy analytic hierarchy process (FAHP) is discussed in this paper. And the hierarchical structure of comprehensive evaluation index system, the alternative set and the comprehensive evaluation model of product platform are established through this method, thus obtaining a satisfaction value, which realizes the change from qualitative evaluation to quantitative evaluation for product platform evaluation. The result shows that the method has a strong feasibility and operability.

Abstract: Aiming at the importance of interface in adaptable design of mechanical products, in this paper, research actuality and development of the Mechanical interface are talked over; and the basic requirements and design criteria of adaptable interface design are discussed; lastly, what capability an adaptive mechanical interface must possess is illustrated combing with a specific case, and the adaptable interface in the case can also be applied to similar structure design of other products.

Abstract: Aiming at the shaft pressing and assembling process for steel shaft and small gear, which is frequent in toy gear reducer assembling, a reconfigurable and multi-station auto shaft pressing and assembling machine had been developed. In the machine, steel shaft and small gear are positioned in a pre-positioned fixture in advance. The assembling process is carried out in three stations simultaneously. It makes the machines efficiency become higher. Applying the reconfigurable design concept, the machine can be divided into basal modules and changeable modules. The changeable modules can be adjusted or replaced to make the machine fit for components of multifarious small gears and steel shafts with different length and diameter. Each module of the machine is introduced in detail and related problems are discussed in the paper.

Abstract: Increasingly, induction heaters are being widely applied to the energy-saving light industrial equipment. But their electromagnetic radiation’s impact on the environment can’t be ignored. In the paper, several medium frequency induction heaters had been studied under different experimental conditions using E61 electromagnetic field strength analyzer, and as its supplement, the racetrack-coils induction heater had been simulated using ANSYS. According to ICNIRP guidelines, the results show that their radiation is generally in critical state, and magnetic field strength is superstandard in some areas. And countermeasures to the problems are advised.

Abstract: The popular international and Chinese electromagnetic radiation protection standards are introduced, including the ICNIRP guidelines constituted by the International Commission on Non-Ionizing Radiation Protection, the EN62233 standards established by the European Committee for Electrotechnical Standardization and the GB 8702-88 regulations constituted by Ministry of Environmental Protection of the People’s Republic of China, etc. The situation of the light industrial equipments electromagnetic radiation has been tested and analyzed: the power of the induction heater is often up to thousands kilowatts, and there are many electrical control components and many dense circuitries in light industrial equipments. Their complicated electromagnetic fields release continuously electromagnetic waves and engender electromagnetic radiations to the surrounding environment. And, Chinese electromagnetic radiation protection standards lack limits for band less than 100 KHz (except 50Hz). It makes the electromagnetic radiation assessment of light industrial equipments lack sufficient basis. The electromagnetic radiation protection standard of light industrial equipments was discussed and the limits for electromagnetic radiation protection of light industrial equipments are suggested.

Abstract: On Labview’s development platform, taking full advantage of multithreading management and data stream control, a quick-responding dynamometer system for cutting process is designed and developed based on the Usb interface. The system possesses functions such as data acquisition, signal generation, signal pre-processing, data storage and data analysis, has facile operation interface, and supports data post-processing and analysis well.

Abstract: The grinding for cylindrical cam’s groove means grinding for groove’s flanks. For cylindrical cam with translating cylindrical followers, an auto-programming system for NC machining of cylindrical cam’s groove is developed. It can be applied to machine cylindrical cam with different types of curve grooves, by using cutter or wheel with different diameter. For validating geometry precision of the auto-programming system, emulation is carried out using the VERICUT, which is a NC machining emulator system. It is showed by the results of the emulation, there is excess of geometry error at bottom of groove when following situations are met: big pressure angle, high precision requirement and big diameter difference between wheel and roller. An important origin of such excess is computational error introduced by the auto-programming system in calculating the coordinates of wheel center.