The metal roll forming machine is driven by a motor, through a transmission system, with the main shaft rotating, and is driven by a three-jaw chuck. Its main movement is the rotation of the workpiece, and the longitudinal feed movement and the radial feed movement are realized by the rolling head.
The workpiece of the metal roll forming machine passes through the center hole of the rolling head, and three rolling wheels are uniformly distributed on the circumference of the rolling head, including one rolling wheel and two supporting wheels. Before work, the three rollers pass through the screw mechanism to make them radially approach and close to the workpiece, that is, centering. At the same time, the three rollers rotate in the same direction relative to the workpiece with the same helix angle (the direction of rotation is consistent with the spiral direction of the workpiece), and then rolling wheel advances in position radially.
When working, the workpiece rotates and the rollers are forced to roll relatively through frictional force, and under the action of axial force, the rolling head drives the tailstock carriage to move longitudinally along the guide rail of the bed. During the movement, the annular shoulder on the rolling wheel contacts the workpiece, the blank is squeezed, stress concentration occurs, and plastic deformation occurs, thereby forming a thread.
The design, manufacture, and use of the metal roll forming machine saves a lathe for the factory, worth more than 100,000 yuan, and enables the lathe to exert greater functions. The emergence of this machine meets the requirements of mass production, the product quality is reliably guaranteed, and the pass rate is almost 100%; it is easy to operate and almost no maintenance costs; it reduces consumption and improves production efficiency by more than 10 times. The development of this special machine not only brings economic benefits to the factory, but also fills the gaps in the equipment of our factory, and provides successful experience for manufacturing metal roll forming machines in the same industry and other industries.