DJ_2型多能桩架是一种重型打桩设备,配合D_2型筒式柴油桩锤可打各种类型的桩。桩架上的丝杆球副接触表面承受较大的压力和摩擦力,工作条件较差。为防止表面局部过热而咬粘卡死和磨损,一般在球轴和球轴盖的内表面上堆焊一层4毫米厚的磷青铜。但是,这种工艺复杂,成本较高,劳动条件差,质量较难保证。为此,我们进行了丝杆球副的表面加热淬火工艺试验。丝杆球头部分在盐炉中进行快 DJ_2 multi-function pile frame is a kind of heavy-duty pile-driving equipment, which can be used with D_2-type barrel diesel hammer to hit various types of pile. Pile holder screw on the ball contact surface to withstand greater pressure and friction, poor working conditions. In order to prevent the surface from overheating and seizing and sticking, wear and tear, usually in the inner surface of the ball shaft and shaft cover a layer of phosphor bronze 4 mm thick. However, this process is complex, high cost, poor working conditions, quality is more difficult to guarantee. To this end, we conducted a screw ball surface heating quenching process test. Screw head part of the fast in the salt furnace