因此，如何提高焊接接頭的強度、硬度，使焊接接頭具有較好的塑性、韌性，防止焊接接頭脆化；如何避免在焊接過程中，焊接接頭出現冷裂紋、熱裂紋及焊接殘余熱應力，是焊接定錐的關鍵所在。為此采取了一系列措施，確保一次焊接成功。
1、防銹性能：使用于軸承內的油脂必須具有防銹效果，防銹劑最好能不溶于水。油脂應具有良好的附著力，并可以在鋼材表面形成一層油膜。
立式復合碎石機是我公司引進國外先進技術，結合國內實際情況開發研制的破碎，分析技術，填補了國內空白，并獲得多項國家發明專利。公司總部位于山東濟南，并設有兩個分廠，一分廠坐落于有江北水城之稱的聊城市，這里是中國重要的交通樞紐中心，交通十分便利。
另一分廠坐落于享有中國桃都之稱的肥城市。
Henan LIMING Heavy Industry Science and Technology Co. LTD which mainly manufacture large and medium-sized crushing and grinding equipments was founded in 1987. It is a modern joint-stock corporation with research, manufacturing and sales together. The Headquarter is located in HI-TECH Industry Development Zone of Zhengzhou and covers 80000 m 2. Another workshop in Shangjie Industry Park covers 67000 m 2. Over the more than 30 years, our company adheres to modern scientific management system, precision manufacturing, pioneering and innovation. Now LIMING has become the leader in domestic and oversea machinery manufacturing industry.
LIMING brings a large number of high-qualification talents together. Bai Yinghui, general research and development engineer, is a well-known expert in crushing and grinding area who won the youth medal of technology of the state council and receives special government allowance. LIMING owns an experienced service team, offering the customer free design and professional skill training and live guide for installation and debugging. The company's service networks have spread all over the country. Established client files, and mix the traditional door-to-door service with online service together, complementary the advantages. LIMING has won high recognition from clients.
The company mainly manufactures mobile crushers, stationary crushers, sand-making machines, grinding mills and complete plants that are widely used in mining, construction, highway, bridge, coal, chemical, metallurgy, refractory matter, etc. Product quality is life, and scientific innovation is motive power. LIMING got ISO international quality system certification, European Union CE certification and Russian GOST certification. The company has strong research and development strength and innovation.
LIMING machinery research institute was founded in 2005 which is the most powerful comprehensive technological research institute in the domestic mining machinery industry and provides top scientific research platform for professional personnel. Up to now, LIMING has won 10 national patents, 24 national utility model patents and 3 provincial science and technology achievement awards. The company products remain the international leading level by strengthening international exchanges and cooperation all the time, and has won a wide range of international market, such as Russian, Azerbaijan, Kazakhstan, Turkey, Kuwait, South Africa, Egypt, Vietnam, Malaysia, India, Australia, Korea, Canada and European Union,etc.
Through more than 30 years' hard work, LIMING's staff built supremacy of credibility, excellent quality, service "LIMING" brand, and has made outstanding contributions to the development of mechanical manufacturing industry for China and the whole world.
