Time：2025-11-07
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With the continuous development of industrial automation, automatic screw driving machines have been widely used in industries such as electronics, automotive, and toys. The working principle is mainly to drive the screwdriver through pneumatic or electric means, combined with a robotic arm, tightening module, and control system, to achieve automatic screw picking, positioning, and tightening. However, in actual use, automatic screw driving machines occasionally experience screw dropping during the suction process, which not only affects production efficiency but also poses a potential threat to product quality.
Analysis of Causes for Screws Falling from Automatic Screw Driving Machines
Issues with the Screws Themselves
(1) Mismatched Screw Dimensions: If the screw dimensions do not match the suction nozzle of the automatic screw driving machine, it can easily lead to screws falling during the suction process.
(2) Poor Screw Quality: Uneven surfaces, burrs, or oil stains on screws can all affect the suction effect of the nozzle.
(3) Batch Differences in Screws: Different batches of screws may have variations in weight, shape, etc., which can also impact the suction effect of the automatic screw driving machine.
Design and Material Issues with the Suction Tube
(1) Unreasonable Suction Tube Design: The shape, size, angle, etc., of the suction nozzle are not properly designed, leading to unstable suction effects.
(2) Inappropriate Suction Tube Material: The material of the suction nozzle should have good wear resistance, corrosion resistance, and sealing properties. If the material is not suitable, problems such as air leakage and wear can easily occur, causing screws to fall.
Issues with the Pneumatic System
(1) Unstable Air Pressure: Air pressure that is too high or too low can affect the suction effect of the nozzle.
(2) Air Leakage in the Tubing: Aging, rupture, or loose connections in the tubing can lead to air leakage, thereby affecting the suction force of the nozzle.
(3) Air Pump Malfunction: A malfunctioning air pump can lead to insufficient or unstable air pressure, further affecting the suction effect of the automatic screw driving machine.
Countermeasures to Solve the Problem of Screws Falling from Automatic Screw Driving Machines
Optimize the Suction Tube Design
Select the appropriate suction tube for different sizes and types of screws to ensure compatibility and improve suction effectiveness.
Increase the suction area, enhance the suction force, and reduce the possibility of screws falling.
Use wear-resistant and corrosion-resistant materials for the suction tube to extend its service life.
Danikor's blow-and-suction module suction tube is made of high-strength steel.
Adjust the Pneumatic System
Adjust the working pressure of the pneumatic system according to actual usage to ensure stable and moderate air pressure, neither too high nor too low.
Regularly check the sealing of the pneumatic system to ensure no air leakage in the tubing, joints, and other components.
Install air pressure monitoring devices to monitor changes in air pressure in real-time and promptly identify and resolve issues.
Improve the Screw Feeding System
Optimize the design of the screw feeder to ensure smooth and stable entry of screws into the bit.
Clean debris and dust from the screw feeding device to keep it clean and avoid contamination of screws.
Regularly check the wear of the screw feeder and replace worn parts in a timely manner.
Danikor's screw feeder can be equipped with long and short nail detection to prevent mixing and ensure consistency in incoming materials. It can also achieve clean feeding, meeting the requirements of clean automated screw feeding processes and reducing the problem of screws falling during suction.
Enhance the Positioning Accuracy of the Robotic Arm
Regularly calibrate and maintain the robotic arm to ensure its positioning accuracy and stability.
Optimize the motion trajectory and algorithms of the robotic arm to reduce interference and collisions with screws during movement.
Introduce advanced visual recognition systems to assist the robotic arm in more accurately positioning screws.
Regular Inspection and Maintenance of Equipment
Develop a detailed equipment inspection and maintenance plan, and conduct comprehensive inspections and maintenance of the automatic screw driving machine on a regular basis.
Focus on the wear and damage of key components such as the suction tube, pneumatic system, and screw feeder, and replace and repair them in a timely manner.
Record the inspection and maintenance of the equipment to provide data support for equipment maintenance.
The problem of screws falling from automatic screw driving machines is a complex issue involving multiple factors. By strengthening screw quality management, optimizing equipment design and materials, stabilizing the pneumatic system, and improving the performance of the robotic arm and control system, this problem can be effectively solved, and the production efficiency and product quality of automatic screw driving machines can be improved. At the same time, enterprises should also strengthen the daily maintenance and care of equipment to ensure its normal operation and extend its service life.
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