论文部分内容阅读
预应力粗钢筋的螺丝端杆锚具一般采用45号钢,经调质热处理,再进行切削加工。许多施工单位无该设备,找外单位加工会增大成本。我们利用上、下夹头最大行程为750毫米的万能材料试验机冷拉端杆原材,保证工程质量,又挖掘了企业内部潜力,钢材利用率可达97%。具体方法是:端杆原材下料长度约660毫米,放进试验机夹头,采用“双控”进行冷拉。冷拉毕,从正中间锯断,可作2根端杆原材;在冷拉部分车螺丝,在夹头部分车螺杆。需
The pre-stressed reinforced steel screw rod anchors generally use No.45 steel, heat treated, and then cut. Many construction units do not have the equipment, and finding an outside unit will increase the cost. We use the universal material testing machine with the maximum stroke of 750 mm for the upper and lower chucks to cold draw the end-bar raw materials to ensure the project quality and tap into the internal potential of the company. The steel utilization rate can reach 97%. The specific method is: the length of the raw material of the end-bar is about 660 millimeters, put into the chuck of the testing machine, and adopts “dual control” for cold drawing. Cold drawn, sawing from the middle of the cut, can make two end rods of raw materials; in the cold pull part of the car screws, in the chuck part of the vehicle screw. need