High-speed machining technology is produced in the global market economy environment of modern dynamics. Since the 1980s, high-speed machining technology has evolved into a comprehensive system engineering technology based on metal (non-metal) traditional cutting technology, automatic control technology, information technology and modern management technology. It has been widely used in production process manufacturing enterprises, such as modern cars and automobile production lines. With the increasing social demand for personalized products, the production conditions are multi-variety, single-piece small batch manufacturing and processing, high-speed processing technology will be in the production process discrete or mixed-type enterprises, such as molds, energy equipment, ships, aerospace Further application and development in manufacturing companies. High-speed cutting means that the cutting movement (or movement) speed of the cutting edge of the tool relative to the surface of the part is 5 to 10 times higher than that of the ordinary cutting, which is mainly reflected in the three steps of tool advancement, work advancement (CMM online detection) and rewind. For the entire production line, the high-speed machining technology is characterized by a simpler process, shorter and faster production tempo on the production line. This is to break through the traditional concept of mechanical processing, under the premise of ensuring product quality, reform the original processing technology: using a multi-station, multi-blade (multi-tool), composite processing, replaced by car, hinge, milling Grinding, broaching, squeezing, rolling, replacing the car, inserting, milling, and shortening the process of the entire production line as much as possible. For a certain product, high-speed processing technology also means that enterprises must complete various types of information collection and processing, design and development, processing and manufacturing, marketing and information feedback of research and development products in a short production cycle. High-speed machining technology in the automatic production line of CNC auto parts Since 2000, Tianjin Qinmeida Industrial Co., Ltd. (CMT) has introduced a number of advanced automatic processing lines for CNC parts processing, which has enabled the development of CMT processing and manufacturing. The most typical one is the DAWOO automatic production line from South Korea, which is at the international level in the mid-1990s. Among them, more practical high-speed machining technology is applied. From this, we can partially understand the current status and development trend of high-speed processing technology in the world. This article focuses on the overview of the processing line CYCLE TIME (production beat). The introduction of the automatic production line of CNC auto parts: It consists of CMT automobile brake bracket and exhaust pipe high-speed processing production line. Simultaneously introduce the parallel engineering management mode and management technology of North American auto companies, and operate various automatic line production and operation, with an annual processing capacity of 3000pcs and a manufacturing cycle of 1.5~3 minutes/piece. The production line adopts compound high-speed cutting technology, and its machining process reflects the most advanced technology level in contemporary processing and manufacturing. The specific situation includes the condition of the blank of the part: the key part blank is the high-strength cast iron forming process of CMT self-DISA line precision casting. The high-speed machining technology requires that the material can be processed and stabilized in the batch production process, and the cutting allowance of the part blank is controlled within (1.2~4) mm±0.3 mm. High-speed cutting tools, machine tools and machining processes in the production line: Typical technical features include the selection of tool materials and super-hard tool materials. High-strength cast iron parts are machined with CBN, PCD, SiN ceramics, Ti-based ceramics and TiCN coated tool materials, with a milling speed of 2200m/min. High-Si-mo castings are machined with PCD and ultra-fine carbide tools. Up to 2200m/min, drilling and reaming speed of 80~240m/min; machining of steel parts with SiN ceramics, Ti-based ceramics and TiCN coating tools, turning speed up to 200m/min; coating of TiCN with high Co powder metallurgy surface High-speed steel integral broach, and special broach for cemented carbide machine clamp combination, processing various steel parts, cast iron parts, broaching speed 10 ~ 25m / min. Quantitative line tool typical structure and processing technology. The part hole machining tool adopts multi-blade composite type (blade machine clamp, insert welding combination) structure, and replaces grinding by reaming and squeezing. The hole is finished in the one-time pass process, the rotation speed reaches 3000r/min, and the cutter is used. The speed is up to 1.5~3 m/min, the precision is up to 5~7, the roughness Ra0.7μm (gun drilling speed 3000rpm, Ra2μm); the part plane milling tool mostly adopts dense teeth, over positioning, repeated clamping structure, diameter, High-speed close-tooth face milling cutter with adjustable axial direction. It adopts the built-in U-axis of the machine tool spindle and completes the spherical forming and milling process with one pass; the outer circle and the end face roughing are replaced by one pass milling and milling, which replaces the single-blade turning process. The above-mentioned special high-speed, high-efficiency tool structure is endless, and the processing station combined with the corresponding special CNC machine tool has a production tempo of 20 to 40 seconds. The accuracy and quality of the components are determined by 60% to 80% of the precision and quality of these special tools and CNC machines. 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