预应力钢筋混凝上圆孔板挤压成形机是一种高效率的成形设备。但由于混凝土的挤压使其中的螺旋铰刀产生严重磨损,影响挤压机的推广和发展。现就混凝土在挤压时对铰刀的磨损机理以及铰刀耐磨条件的合理选择作一介绍,供参考和探讨。一、混凝土挤压机铰刀磨损分析以60型挤压机生产混凝上圆孔板为例(图1),它是依靠螺旋挤压、振动行模的功能来实现的。混凝土料经料斗8落下,由螺旋铰刀16输送至振动器10下面,使之振动密实,经成形管15成孔后,制成圆孔板。机身 Pre-stressed concrete coagulation on circular orifice plate extrusion machine is a highly efficient forming equipment. However, due to the extrusion of the concrete, the spiral reamer therein is seriously worn and affects the promotion and development of the extruder. Now the introduction of the reasonable choice of the wear mechanism of the reamer and the wear condition of the reamer when the concrete is extruded is provided for reference and discussion. First, the concrete extruder reamer wear analysis of the 60-type extruder production of coagulation on the circular hole plate as an example (Figure 1), it is relying on screw extrusion, vibration line mold function to achieve. The concrete material falls through the hopper 8 and is conveyed by the screw reamer 16 to the underside of the vibrator 10 to make it vibrated and compacted. After the forming tube 15 is formed into a hole, a round hole plate is formed. body