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It is understood that before the successful trial production of this excavator, China's large excavators have been relying on imported or joint venture production. In 1961, the first 4 cubic meters of excavators in China were successfully modeled after the Soviet 3 cubic meters excavator, creating a history of producing large excavators in China. Subsequently, the company independently developed a 10 cubic meter excavator and its improved WK-10B excavator, and cooperated with P&H Company of the United States to produce 2300XP and 2800XP excavators, increasing the localization rate of the product from 34% to more than 80%. . After more than 20 years of introduction, digestion, absorption and re-innovation, it has accumulated a wealth of technical and manufacturing experience, laying the foundation for the development of large-scale mining excavators with independent intellectual property rights. At present, it has accumulated more than 1,000 types of excavators, with a market share of over 95%. The products are distributed in domestic open pit mines, iron ore, non-ferrous metals and building materials, and exported to Pakistan, Vietnam and other countries.
In 2005, Taizhong decided to independently develop a 20-cubic-meter excavator of model WK-20 based on the work needs of Shenhua Zhugeer Energy Co., Ltd. and Shougang Mining Co., Ltd. and the national market demand.
In the development process, it is too focused on the international advanced level, and boldly adopts AC variable frequency motor and its control system in electrical design, replacing the traditional thyristor power supply and DC motor system, so that the core technology of WK-20 excavator has been achieved. The advanced level of international similar products. In March 2006, the first 20-cubic-meter excavator with complete independent intellectual property rights was officially put into use in Shenhua Zhugeer Energy Co., Ltd.
In the development and use of large excavators of 20 cubic meters, 27 cubic meters and 35 cubic meters, the heads of various open pit mines and related experts put forward the rationality of design, the applicability of the process and the excellence of service. A lot of valuable comments. As the first enterprise in the national heavy machinery industry to introduce foreign advanced technology and carry out technical cooperation, in the face of the large-scale demand for mines in China, it is too heavy to timely summarize the experience of independent development of large-scale mining excavators of more than 20 cubic meters. International technical cooperation, including hiring foreign famous engineers as chief designers, hiring foreign experts as quality consultants, accelerating the digestion and absorption of foreign advanced technologies and re-innovation steps, actively exploring and acquiring foreign design companies, directly connecting with international advanced technologies.
By vigorously strengthening independent innovation, too heavy has achieved the upgrading of traditional products and the broadening of product services and competition, forming a framework for sustainable development. At present, Taizhong has signed three 20-cubic-meter excavator manufacturing contracts with Huaneng Yimin Coal and Electricity Co., Ltd., and signed two 27-cubic-meter excavator manufacturing contracts with CLP Humei Group Co., Ltd., and Shenhua Zhugeer Energy Co., Ltd. The company signed a 35 cubic meter excavator manufacturing contract. Industry experts believe that the successful development of WK-20 (20 cubic meters) large excavators has explored a new way of localization of large-scale open-pit mine equipment in China.
The first large-scale WK-20 (20 m3) excavator with complete independent intellectual property rights developed by China has successfully passed the evaluation of experts and users in Taiyuan. The judge believes that the core technology of the excavator has reached the international advanced level of similar products.