| This dissertation studies the modern technology and automatic production line of bead and chain precious metal jewelry processing. With the precious metal jewelry market being prosperous and people’s consumption level Constantly improving, the precious metal jewelry processing technology has already shifted gradually from the traditional manual process to the modern automatic processing technology. But because of the structure of the precious metal jewelry, the particularity and complexity of craftsmanship and the speed of consumer market demand for modeling and design innovation being greater than that of technological innovation, new processing equipment research and development level, the current processing technology lags behind the production and market demand which restricts the development of jewelry manufacturing; especially all kinds of beads and chains precious metal jewelry have a big processing capacity and cost more time and large work, which makes the production lines of large companies have a strong desire for Improvement of production technology and innovation of them. While the actual production, owing to the high cost of labor force training and the difficulty of the current process equipment operation is difficult to quickly grasp; the machining process is difficult to control and the processing of jewelry pieces has an unstable precision and low yield; the R&D cost is high and this industry has a strong technical conservation and a lack of mature processing technology and data that can be drawn lessons from; the domestic specialized research institutions and related personnel of jewelry processing technology development is too little. It is so many reasons that the size of the domestic jewelry manufacturing industry, development speed and quality of the finished product is limited.The author devotes to technical innovation and automation equipment research and development of the jewelry processing industry, researches the domestic large-scale jewelry enterprise, tracks all the process and details of the precious metal jewelry production enterprise, summarizes technological requirements of modern mass production, and researches specifically and deeply mechanization, automation and intelligent processing technology of the beads and chains precious metal jewelry; with positive communication with technical workers and managers in the production line, the author is committed to improve the traditional production process which restricts the development of the beads and chains jewelry manufacturing technology, and find and solve the technical key problems existing in the current industry; the dissertation uses multi-disciplinary theoretical knowledge and practical results and does some practical research and development for the industry development. The research results have been successfully transformed into actual productivity, and good results and practical application are achieved at the scene of the large modern enterprise of production. Automatic molding process of bead jewelry piece is studied and a fully automatic hammer bead machine and stamping processing method is developed, which is able to complete automatic stamping processing of bead jewelry pieces; Chain products automation molding process based on real-time positioning system is studied and a kind of the butterfly chain automatic punching machine and stamping processing methods are developed, which is able to complete automatic processing that can make orthogonal chains secondary forming into butterfly chains or other similar types of chains; The current popular diamond faceting of sycee chain is further studied, the processing model for this kind of chain is established, a kind of automatic diamond faceting system of sycee chain is developed and the diamond faceting process of sycee chain without human intervention can be finished step by step. Further elaborated as follows:A variety of bead-shaped and olive-shaped precious metal beads are widely applied in the modern market. And processing of such parts is still hand-stamping based. This dissertation proposed and developed a creative one for bead-shaped and olive-shaped bead jewelry stamping forming automatic equipment, in which embedded control systems based on modern design concept is used. The finished device can replace the manual work and automatic process of the round ball and oval-based centrosymmetric spherical shape of the jewelry components. In this dissertation, bead jewelry pieces automation processing system was theoretically studied and practically developed. The main tasks are as follows:The idea of using electromechanical integration equipment to replace manual processing with bead jewelry part of the overall structure of the model is achieved. The model of modules and functions are in-depth analyzed and specifically researched. The whole model of the device according to the different nature of the structure and mechanical parts are divided into three parts. The three most important R&D work is the specific content and logical structure. This three-part exists three logical relationships: the underlying structure is the mechanical parts, electronic control portion is the middle layer and the control program portion is the top structure.Reference to the actual processing of the process flow, according to the functional design of mechanical parts, the three body structures are achieved, designed lifting mechanism, rotating mechanism and feeding mechanism of the body structure, assembled the three component parts, and completed the processing of parts. Based on the completed assemble of mechanical parts and the original motivation for the control of mechanical parts and the equipment, it is required for the function of electrical research and analysis part of the composition of the obtained electronic control modules. The appropriate micro-controllers and other electronic components are chosen. Modern technology of circuit design and application is used to design the micro-controller system, the keyboard input module, the liquid crystal display module, the motor drive module, the press control module and the alarm module. Upon completion of the underlying mechanical and electronic control part of the middle layer, based on the state of the stepper motor control requirements and the electronic control system functional requirements of each module and method, the micro-controller is served as a carrier to control the lifting, rotating and feeding mechanism driven stepper motors, and to drive the auxiliary devices such as the matrix keyboard, the relays, the alarm and display control system, using the procedure-oriented structure programming method.This dissertation introduces the research and production of an automatic molding machine for butterfly chain in jewelry based on real-time positioning system; detailedly introduces the design principle, components, operation method of the automatic punching machine for Butterfly chain; and finally tests the machine by putting it into factory actual production. This machine works on the principle of the real-time positioning; under the control of the embedded system it can coordinate the whole machine in chain institutions, testing institutions, stamping institutions etc. The whole equipment at least include stamping institutions, installation shelf, testing agency, positioning agency, chain collecting institutions, bench and control box.Stamping institution includes punch, electromagnetic clutch and stamping die, the electromagnetic clutch is installed on the punch as a auxiliary part. This institution is mainly used to provide instantaneous momentum, which drives the hammer to fast extrude the chain link to complete the forging process. The testing agency consists of infrared detectors, which can accurately detect the locate direction of the link, realize one-time processing the chain completely without repeated processing chains in different direction, thus reducing material wear and avoiding destroying the processed chain. The positioning agency consists of feeding catheter, damping channel and testing port fixed guide hole and closed chain port fixed guide hole. Location of these two fixed guide hole is adjustable in vertical position; hole sizes are also adjustable to adapt to different specifications of the chain. The chain collecting institutions are installed on the closed chain port vertical plate, includes stepper motor, taking sprocket and chain scraper, processed chain are collected into the collecting hole at last.This dissertation also introduces in detail the operation method of the automatic molding machine for butterfly chain, in which just a few simple operations need human handle, namely the loading for unprocessed chain and align the pressing point, the open the stamping mechanism. This machine uses infrared detection and software program control technology to realize real-time coordinating each circuit module operation according to set logic function orderly; detecting chain position at random time intelligently. Make sure feeding amount according to the actual length of the link to maximize the accuracy when sending the unprocessed chain to pressing point, which can effectively overcome feeding error caused by different link length.Automatic molding machine for butterfly chain can posit precisely after been assembled and tested; yield whole butterfly chain. Repeated experiments and practical production in factory showed the butterfly chain products could have precise size, beautiful shape with low rejection rate, which has reached the automatic processing standards in factory. This machine is easy to operate by workers, one can watch many running machine at the same time. With high efficiency and good effect, the machine has successfully served in production workshop in precious metal jewelry processing enterprises.The dissertation describes a way that diamond faceting for sycee chain can achieve assembly line production. Sycee chain as a new chain, due to its unique shape and appearance characteristics, is favored deeply by the consumer market. Complex diamond faceting molding process creates a perfect shape of sycee chain that each link of the chain consists of four trucking, two arc concave facet, four small triangle facets and two ridges. This dissertation studies the whole link model and independent model in detail, and analysis detailed processing knife method and technological process of diamond faceting process. According to the characters of the key working procedure, automation processing method and corresponding equipment is developed to achieve automatic assembly line production of diamond faceting for sycee chain.This dissertation creates a shape of blank chain and each link of the chain, and defines the related shape and location. First of all, it makes sure that two adjacent links in the whole blank sycee chain are in orthogonal connection, and defines coordinate system origin0, X Y Z axis, coordinate plane, A_SIDE plane, A_TOP plane and A_FRONT plane of two adjacent links according to Cartesian coordinate system. Then it analyzes a single link of blank chain, and determines that a single link consists of catenary ring and regular quadrangular chain core. According to Cartesian coordinate system, it creates a unit model of single columnar link, and defines coordinate system origin O, X Y Z axis, A_SIDE plane, A_TOP plane and A_FRONT plane of a single link in the model. The analysis shows the coincidence relationship between the central axis and the X axis; a square projection sides in the SIDE plane which corresponds to FRONT_UP plane、FTONT_DOWN plane、BACKUP plane、BACK_DOWN plane is Faces To Cut; the link edge in the FRONT plane is processed ridge; the core chain angle in the TOP plane is processed angle.It analyzes the diamond faceting manufacturing procedure of sycee chain, and explains how analogue different cutting of three kind of working procedure in the unit model of single link changes the link model. Row surface process is the side processing of core chain which needs to choose different axis of revolution to facet four machine faces to form plane groove; Shovel edge technology is to excavate two link edges to form two concave arc surfaces in the ridge; Cutting angle process is to cut four chain core angle to form isosceles triangle facets in the angular position. According to the characteristics of three kinds of diamond faceting technology and the operability study of the actual machining process, detailed processing steps of three processes are designed, which correspond to facets, edges and angles specific implementary process flows.According to the analysis of related model and manufacturing process of sycee chain, automatic diamond faceting system for sycee chain is developed which includes the design of mechanical structure, the construction of the control system circuit and the preparation of the control program. The mechanical structure includes rolling chain mechanism, measuring chain mechanism, clip chain mechanism and faceting chain mechanism, which can finish the assembly processing actions of sycee chain, such as drive, test, clamping and faceting. According to the encapsulation of the structure and the transparency of function, it constructs electronic control system of diamond faceting machine which can provide electricity for diamond faceting machine, achieve motor drive controller of all the mechanical part with main control chip as the core control, collect shape parameters of the link, judge processing status and send the command signals, such as rolling, clamping, and faceting. With structured programming method for process, it compiles operating steps of automatic diamond faceting process of sycee chain and control program of assembly production, which can complete the whole integration process of sycee chain according to the design program. |
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