我厂生产的872弓型鋸床,有一套上下夾箍的零件,材料用45鋼。过去我們是用自由鍛造方法鍛成如图1的毛坯的,每件要4.5小时,耗用材料3公斤。后来我們改进一套胎模,把上下夾箍政为單件胎模鍛造,結果使耗用材料降到1.86公斤,每件只要0.9小时,并且还节省了許多机械加工工时。上下 I plant the production of 872 bow sawing machine, a set of parts from top to bottom clip, 45 steel materials. In the past, we used forgings to forgive the blank as shown in Figure 1, each 4.5 hours, consuming 3 kg of material. Later, we improved a tire mold and pinched the upper and lower clamps to a single piece of tire forging. As a result, the consumable material was reduced to 1.86 kg, each weighing just 0.9 hours, and saved many machining hours. up and down