| Perfectly wire drawing machine | | | | through the wire drawing machine. If the wire |
| A wire drawing machine includes a frame; at least | | | | becomes too hard or brittle, breakage occurs during |
| one die operatively supported by the frame; at least | | | | the drawing process or when the wire is subjected |
| one drawing block rotatably supported by the frame | | | | to torsion or bending. |
| for use in drawing wire through the die; and, a motor | | | | It is well-known to provide a drive system for use in |
| for use in providing power. A belt system connects | | | | rotating the drawing blocks of a rod breakdown |
| the motor to the drawing block so that the drawing | | | | machine. Typically, one motor is used to drive multiple |
| block can be rotated. To adjust the speed and | | | | drawing blocks. Such a design generally works well |
| torque of the drawing block, the belt is removed and | | | | for its intended purpose. The problem, however, with |
| one sprocket is replaced with a second sprocket. | | | | this type of drive system is that slip at each drawing |
| A. Field | | | | block cannot be carefully controlled. One attempted |
| This invention relates to methods and apparatuses | | | | solution to this problem is to provide one motor for |
| for drawing wire and more specifically to methods | | | | each drawing block. In this way, the speed and |
| and apparatuses for controlling the speed and torque | | | | torque at each drawing block can be carefully |
| of the drawing blocks used on a fine wire drawing | | | | controlled thereby controlling slip. The problem with |
| machine. | | | | this solution, however, is the expense of providing all |
| B. Description | | | | the required motors. It is well-known, for example, to |
| It is know to draw wire through multiple dies at | | | | use twenty (20) or more drawing blocks which would |
| multiple die positions of a wire drawing machine. The | | | | require twenty (20) or more motors. |
| hardness of drawn steel wire results from the plastic | | | | What is needed is a method and device to accurately |
| deformation associated with the drawing process. | | | | adjust the rotational condition of each drawing block |
| The wire increases in hardness as it proceeds | | | | without the need for multiple motors. |