The wire drawing machine ensures the wire drawing accuracy mainly through the following key links:
Mould system
Die quality: High-quality wire drawing dies are the basis for ensuring accuracy. The inner hole size accuracy of the die is extremely high, and it is usually manufactured using high-precision processing technology, such as EDM, CNC grinding, etc. These processes can ensure that the geometric accuracy of the inner hole of the die, such as roundness and cylindricity, reaches the micron level. For example, when drawing fine metal wires, a slight deviation in the inner hole size of the die may result in the wire diameter accuracy not meeting the requirements.
Die selection and matching: Choose the appropriate die according to the different wire drawing materials and target wire diameters. The die material, aperture, shape and other parameters need to match the wire drawing process. For example, for wire drawing of hard materials, it is necessary to select a die material with higher hardness and better wear resistance, and the die aperture must be accurately determined according to the target wire diameter to ensure that the material passes through the die evenly during the wire drawing process, thereby achieving precise size control.
Tension control system
Constant tension control: In the wire drawing process, it is very important to keep the tension stable. The wire drawing machine monitors the wire drawing tension in real time through the tension sensor and feeds the signal back to the control system. The control system automatically adjusts the wire drawing speed or winding speed according to the feedback information to ensure that the tension is always kept within the set range. For example, when the tension is too large, the control system will appropriately reduce the wire drawing speed to prevent the material from being over-stretched and causing the wire diameter to become thinner; conversely, when the tension is too small, the wire drawing speed will be increased to maintain a stable wire drawing state.
Tension compensation mechanism: In order to cope with tension fluctuations that may occur during the wire drawing process, such as uneven materials, die wear, etc., the wire drawing machine is also equipped with a tension compensation device. These devices can quickly adjust the tension in a short time, so that the influence of tension changes during the wire drawing process on the wire diameter accuracy is minimized.
Speed control system
Precise speed regulation: The drawing speed and winding speed of the wire drawing machine need to be precisely matched. Advanced wire drawing machines use high-precision motors and inverters to achieve precise speed regulation. During the wire drawing process, the appropriate drawing speed and winding speed are set according to factors such as the material characteristics, wire diameter requirements, and die parameters. For example, when drawing high-precision fine wires, the speed control accuracy can reach a fine-tuning level of several centimeters per minute, ensuring that the material passes through the die at a stable speed to achieve precise wire drawing.
Speed synchronization control: For multi-pass wire drawing, speed synchronization between each pass is very critical. The wire drawing machine uses an advanced control system to maintain a strict proportional relationship between the drawing speed and winding speed between adjacent passes, ensuring that the material can be uniformly deformed during each drawing process, thereby improving the drawing accuracy.
Monitoring and feedback system
Online monitoring equipment: Install online monitoring equipment, such as laser diameter gauges or optical microscopes, to measure the wire diameter after drawing in real time. These devices can accurately measure the wire diameter to microns or even smaller units, and detect wire diameter deviations in a timely manner. For example, a laser diameter gauge can accurately calculate the wire diameter by emitting a laser beam and measuring the time difference or angle change of the reflected light, and transmit the data to the control system.
Feedback adjustment mechanism: The control system makes real-time feedback adjustments based on monitoring data. Once the wire diameter deviation is found to exceed the set range, measures are taken immediately, such as adjusting the position of the die, changing the wire drawing speed or tension, etc., to correct the deviation and ensure that the wire drawing accuracy always meets the requirements. This real-time monitoring and feedback adjustment mechanism can effectively ensure the wire drawing accuracy and improve product quality.
If you need high quality cold drawn wire drawing machine, please contact Wandeshun Machine for more questions.
