Cold Drawing Machine

Cold drawing machine is a type of hydraulic drawing bench that is used to draw cold-formed metal bars and coils of various sizes, shapes and alloys. The process allows for the production of a much more precise and uniform cross section than what would be possible with hot extruded materials, and also reduces the overall diameter of the material. In addition, the process produces a surface that is more bright and polished and has superior mechanical properties. It also has improved machining characteristics and accurate and precise dimensional tolerances.

This is a relatively high-production process, and is designed to run at full capacity for long periods of time with a minimum of downtime. In order to achieve this, the system is designed with a number of important parameters that are controlled by computers to ensure consistency and reliability of the work produced. The control systems also help to minimize the amount of energy that is needed to perform the work, and to optimize the work performed based on the specific requirements of the customer.

The basic equipment required for the cold drawing process consists of a calamine stripping machine, a wire rod sharpening machine and a drawing die. The calamine stripping machine removes the coating of iron, called calamine, that is applied to the wire rod during its hot production process. This is necessary in order to facilitate the entry of the rod into the drawing machine. The sharpened rod enters the drawing die, which gradually reduces its diameter. Depending on the final shape, several passes may be necessary through smaller and smaller drawing dies. The finished steel product is then annealed, in order to soften the material and modify its microstructure and mechanical properties.

To determine the optimal energy-power parameters for the process, mathematical modeling of the drawing behavior is required. This is usually done by means of simulation using proven software packages such as QForm, ABAQUS and DEFORM. These programs can be used to simulate the actual operation of a drawing machine and to estimate performance based on parameters such as the energy-power requirement, the power consumption by the motor and the drawing force.

The exact calculation of the energy-power parameters for a given drawing schedule is complicated by a number of factors. For example, the ratio of wall reduction to diameter reduction will have an impact on the quality of the drawn rods. This ratio is usually specified by the customer and will be based on the expected properties of the finished product. In general, larger wall reductions will tend to iron, or smooth, the ID surface, while diameter reductions will have a tendency to roughen this surface. A suitable balance between these two considerations must be found for the best results. The optimum drawing schedule will take these factors into account.