Door closers are generally used on fire escape doors, so the quality is critical. When a fire occurs, the door closer can act as usual to extinguish the fire in a confined space to reduce losses. The quality depends on the parts it uses, the imported gears and the high-quality sealing ring, which effectively prevents slipping and oil leakage. According to market information, most quality problems are related to poor manufacturing, and the importance of the process cannot be ignored. There are many changes in the manufacturing process of door closer parts, but there are still rules to follow through research and analysis. The principle of process formulation is mainly to: grasp the key - accurately select the benchmark; grasp the key - use reasonable tooling guarantee; determine the method - the correct process route. Relying on the careful preparation of the craftsman, combined with the operator's field experience to brainstorm, to make the manufacture of the door opener parts meet the design requirements, it is entirely possible to achieve high quality and high yield. First, the importance of mechanical manufacturing process: Quality products are derived from excellent design, and rely on the reliable guarantee of good manufacturing, and good manufacturing depends on perfect processing technology. Only by selecting the right processing technology can we produce high-precision products, reduce production costs, improve production efficiency, and create good benefits for enterprises. The manufacture of door closer parts is difficult due to the variety, complicated structure and wide use of materials, so the processing quality is difficult to control. Especially in single-piece, small-batch, variety production mode, the process is relatively concentrated, and requires the operator to master more comprehensive mechanical manufacturing expertise, with a good comprehensive quality. The structure of the door closer is complex, and the castings account for more than 80%, mainly for cast iron parts, cast steel parts and cast stainless steel parts; there are few shaft parts, mainly high quality carbon steel, chrome steel or stainless steel parts. The processing of the door closer parts, because of its hydraulic flow path, must find the correct position of the flow path when considering the positioning of the clamping reference. Avoiding the assembly, the pressure water chamber and the impeller flow path are skewed, misaligned, unevenly gaped or even rubbed, which affects product quality. In order to ensure the accuracy of parts manufacturing, it is necessary to design the corresponding tooling and arrange the process control process factors reasonably. Article source: http://gemeiwj.chinawj.com.cn/contact.html
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