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Qingdao Tongchun Electromechanical Technology Co., Ltd. relies on the existing silica sol precision casting technology. After five years of technical research, it has proposed a new mold design and manufacturing method for the "automatic winding machine metal trough overall precision casting method". And the forming method of complex parts provides an effective forming process for forming parts with complicated structure and difficult to form, and provides technical support and support for the localization of the winder. The first technology of the process is to adopt a mold-opening scheme combining axial splitting, sand core and live block, which solves the problem of the inverted draft of the vase-shaped groove portion of the metal trough, and successfully develops a trough shape corresponding to the metal trough. The casting mold makes it possible to carry out precision casting of the winding machine. Secondly, aiming at the special structural shape of the metal trough of the automatic winder, the existing silica sol precision casting process is improved, and the problem of rough casting of the metal trough is solved. The third is to use the micro-grinding flexible polishing technology, which not only maintains the original groove shape of the metal groove blank, but also achieves the surface quality requirement of the metal groove groove surface roughness Ra0.4.
The technology has the following characteristics: First, the forming of the metal trough is formed by precision casting. That is, by the method of precision casting, the complex groove groove is formed during the blank casting, thereby eliminating the complicated and expensive groove processing process in the existing molding method, improving the efficiency and reducing the cost. Second, the shape and size of the trough shape of the metal trough is formed by a precision grooved cylinder mold, and the groove is round and smooth, and can be directly polished. Third, the groove produced by the whole casting technology saves the complicated processing and forming method and the expensive groove processing cost, the same production scale, the cost is only 1/10 of the five-axis forming method, and the production cost of the groove is reduced 40 %the above.
The metal trough developed by Tongchun Company has been tested in many large cotton mills in China. From the perspective of the use effect, various performance indexes have reached, and even exceeded, the metal trough of Savio automatic winder produced in Italy. cylinder. The products are run on the Savio automatic winder of the cotton spinning company such as Qingdao Bayi, Dezhou Demian, Binzhou Liumian and Shandong Beyond. The winding speed reaches 1200~1300 m/min, the running condition, the spindle forming and the winding quality. And the unwinding of the yarn reaches the installation requirements. According to the comprehensive performance test results of the textile machine test center of Wuxi Mashan, the indicators have fully met the requirements for use. In addition, in the comparative test of the yarn guiding performance of Zhengzhou Zhongyuan Textile Institute and Savio and Murata's metal trough, the yarn failure rate index is lower than that of imported metal troughs. At present, Qingdao Tongchun Company has the production capacity of 2000~5000 pieces of metal troughs per month, with mature production technology and stable quality.
In recent years, China's demand for automatic winder metal troughs has risen sharply. In 2005, it has exceeded 30,000 pieces, and this year is expected to exceed 40,000 pieces. However, due to the relatively low level of machining equipment in China, it is impossible to complete the processing of complex grooved groove parts. The demand for this part in China has always relied on imports. Although many powerful enterprises in China use the superplastic method to solve the problem of forming the groove of the metal trough, the manufacturing of the forming mold can not solve the problem of the inverted mold of the groove portion of the trough. The metal trough has become a bottleneck that hinders the localization process of the automatic winder in China. It is imperative to solve the problem and realize the industrialization of the "automatic winding method of the automatic winding machine metal trough".