The Roofing Bolts is one of the screws. The working principle is that the set screw is screwed into the screw hole of the machine to be fixed, and the end of the screw is pressed against the surface of the other machine, even if the previous machine is fixed on the On the latter. There are many types of screws, among which the slotted screw has the smallest pressing force, the square head screw has the largest, and the hexagonal screw is centered. Cone-end screws are suitable for machines with low strength; non-pointed cone-end screws are suitable for machines with recesses made on the pressing surface to increase the ability to transfer loads; flat-end screws (the pressing surface should be flat) and The recessed end screws are suitable for the parts with large hardness or frequently adjusted position; the long cylindrical end screws are suitable for tubular shafts (on thin-walled parts, the cylindrical end enters the eyelet of the tubular shaft to transfer a larger load , But there should be a device to prevent the screws from loosening during use.
       The lathe is specially used for processing round head bolts. It realizes the longitudinal advancement and clamping of the workpiece by the workpiece advancing cylinder and the workpiece closing cylinder. The high-speed rotating forming tool quickly processes the sharp corners and locking of the front end of the bolts. Compared with the current lathes that rely on multiple cam mechanisms to realize the feeding, clamping, feeding and retracting of Round Head Bolt, and non-rotating work of the machining lathes, the structure of lathes specially used to process round head bolts is more Reasonable and more productive.