According to preliminary statistics, in 1985, aluminum forgings accounted for 0.5% (18,000 tons) of the world's total forging production, and in 2008 it rose to about 18%. At present, the world's consumption of forgings is about 4.5 million tons/year, of which aluminum forgings are about 800,000 tons/year. With the increasing market application of aluminum alloy forgings. Manufacturers are also improving the production efficiency of forging products. Among them, aluminum alloy forging connecting rod is a typical case. In the production process of aluminum alloy connecting rod, the general forging process flow includes billet making, pre-breaking, final forging, trimming, punching, and straightening. In the traditional production process of aluminum alloy connecting rod forgings, the trimming process, punching and straightening process are independent and separate, and independent trimming dies, punching dies and straightening dies are used to install the above-mentioned large aluminum forgings. Go to the equipment for separate trimming, punching and straightening, because each process has independent molds and independent machine tool operations. As a result, the problems of high production cost and large investment of enterprises are caused. Therefore, it is urgent to design a mold structure that can integrate trimming, punching and correction to relieve production pressure.
Large aluminum forgings are designed with special heat treatment tooling to ensure sufficient product space between connecting rods during heat treatment. When the product rises to 507±5℃ with the furnace temperature, the holding time is 6h+0.5h/0. Solution transfer time≤15s. Aging heat treatment, when the product is heated to 170±5℃ with the furnace, it is kept for 12h+0.5h/0. Turn on the furnace and lower the product to room temperature, then take it out and place it in a special material frame to facilitate the flow of the next process.
Large-scale aluminum alloy forging connecting rods complete the forming process of connecting rods by designing reasonable pre-forging and final forging dies and selecting reasonable materials. Design a composite mold for trimming, punching, and correcting aluminum alloys. Using the characteristics of plastic deformation of aluminum alloys, the production process of three processes is solved by one reciprocating motion, which not only saves labor costs and mold costs, but also improves production efficiency. enterprise competitiveness.