A vis est un élément mécanique couramment utilisé pour transmettre le mouvement et la force. Il se compose d'un arbre fileté et d'un écrou, et les boules sont utilisées pour transmettre la force et le mouvement à travers les fils entre le arbre fileté et l'écrou. Les balles jouent le rôle de la transmission de la force, de la réduction du frottement et du mouvement latéral et de l'amélioration de l'efficacité de la transmission et de la précision. Les critères d'identification des vis à billes peuvent être décrits par les aspects suivants. Le premier est le pas, ce qui indique la distance que la vis à billes se déplace vers l'avant par rotation. Le pas détermine la vitesse et la sensibilité de la vis à billes, généralement exprimées en millimètres / tour ou pouces / virage.Le second est le capacité de chargement. La capacité de charge d'une vis à billes décrit la charge maximale qu'il peut supporter, généralement en newtons (n) ou en livres sterling (LBF). La capacité de charge affecte directement la portée d'utilisation et l'application de la vis à billes. Différents environnements et exigences de travail nécessitent la sélection d'une capacité de charge appropriée. Le troisième est le niveau de précision. Le niveau de précision fait référence à la précision du mouvement et de la transmission de la vis à billes. Couramment utilisé Les niveaux de précision incluent C0, C3, C5, etc. La qualité de précision détermine la précision de positionnement et la répétabilité de la vis à billes, qui est très importante pour les applications qui nécessitent un contrôle de position de haute précision. De plus, le diamètre, la longueur, le matériau, etc. de la vis à billes sont également un contenu important dans la description d'identification. Le diamètre et la longueur affectent la taille globale et la méthode d'installation de la vis à billes, tandis que le matériau détermine la résistance et la durabilité de la vis à billes. Nanjing Shuntai Precision Ball Vis La paire est normalisée en 8 types de noix comme indiqué sur la figure. De plus, afin de répondre aux exigences des clients, nous pouvons faire des noix non standardisées avec des formes spéciales (telles que le carré, l'intersection de l'axe, etc.), des propriétés spéciales (comme une résistance à haute température, une résistance à la corrosion, etc.) et des formats non conventionnels et non conventionnels (comme l'extension, la charge lourde). Si vous avez des besoins, veuillez consulter.

The spline screw in the SCARA (Selective Compliance Assembly Robot Arm) four-axis robot is a key transmission component, mainly used to achieve high-precision linear motion and rotational motion (θ axis, usually the fourth axis) of the robot in the vertical direction (Z axis). The following is its detailed use and description: 1. Main use Z-axis lifting motion: The spline screw converts the rotational motion of the motor into precise linear motion, driving the end effector of the robot arm (such as grippers, suction cups, etc.) to move up and down in the vertical direction. Rotational motion transmission: The spline structure transmits torque at the same time to achieve the rotation of the fourth axis (such as the rotation of the end tool), meeting the needs of assembly, screw tightening and other operations. High precision and rigidity: Suitable for scenarios that require repeatable positioning accuracy (such as ±0.01mm) and resistance to lateral forces (such as precision assembly and handling). Synchronous motion: When the Z-axis lifting and rotational motions work together (such as inserting parts), the spline screw can ensure the synchronization of the two motions. 2. Structural description Spline part: The external spline cooperates with the internal spline sleeve to transmit the rotational torque (θ axis), while allowing the shaft to slide up and down in the spline sleeve (Z axis), realizing the combination of rotation and linear motion. Screw part: The precision ball screw converts the rotation of the servo motor into linear motion, providing high-precision, low-friction lifting drive. Integrated design: The spline and the screw are usually integrated on the same shaft, saving space and simplifying the transmission chain. 3. Core features High load capacity: The spline structure disperses torque and radial force, suitable for cantilever loads (such as horizontally extended robotic arms). Low backlash: The preloaded ball screw and spline cooperate to reduce the motion gap and improve the repeatability. Compactness: The integrated design reduces external transmission components and adapts to the narrow joint space of the SCARA robot. Durability: Hardened steel or coating technology is used, which is wear-resistant and has a long life (such as more than 20,000 hours). 4. Typical application scenarios Electronic assembly: PCB board plug-in, chip handling (requires Z-axis precision lifting + rotation alignment). Automated production line: screwing, gluing (rotation and pressing action). Medical equipment: reagent packaging, test tube operation (dust-free, low vibration requirements). 5. Comparison with other transmission methods Characteristics Spline screw Timing belt + guide rod Linear motor Accuracy High (μm grade) Medium (affected by belt elasticity) Very high Load capacity High (suitable for heavy loads) Medium-low Medium Cost Medium Low High Maintenance complexity Regular lubrication Belt replacement Almost maintenance-free 6. Selection considerations Accuracy level: Select C3/C5 screw according to the task. Dust-proof design: Sealed spline sleeve prevents dust from entering (such as IP54 protection). Lubrication method: Automatic lubrication or maintenance-free grease design. Through the composite function of the spline screw, the SCARA robot can efficiently complete complex movements with limited degrees of freedom, becoming the mainstream choice in 3C, automotive electronics and other fields.

In the field of modern industrial automation and precision machinery, arm robots have become an indispensable and important equipment. In this type of high-precision mechanical system, ball screws, as key transmission components, play a vital role. This article will explore in depth the application of ball screws in arm robots and their technical characteristics. Ball screws are a precision mechanical element that converts rotational motion into linear motion. They are composed of screws, nuts, balls, and return systems. Compared with traditional sliding screws, their biggest feature is to reduce friction through the rolling contact of the balls, thereby achieving high efficiency (usually up to 90% or more) and high-precision motion transmission. The application advantages of ball screws in arm robots are as follows: High-precision positioning: Modern industrial-grade arm robots usually need to achieve micron-level positioning accuracy. The small backlash and precise lead of ball screws make them an ideal choice. High load capacity: The large contact area of the balls disperses stress, allowing arm robots to handle heavier workpieces without affecting accuracy. Long life and low maintenance: Rolling friction greatly reduces wear, extends service life and reduces maintenance frequency. High speed response: Low friction characteristics allow faster acceleration and improve the efficiency of arm robots. Despite the obvious advantages, ball screws still face some challenges in arm robot applications: Thermal deformation problems: Heat generated by high-speed movement may lead to reduced accuracy. Modern solutions include the use of cooling systems and low thermal expansion materials. Miniaturization needs: With the development of collaborative robots, the demand for compact ball screws is growing, which has promoted the development of miniature ball screw technology. Intelligent integration: The new generation of ball screws has begun to integrate sensors to monitor load, temperature and wear status in real time to achieve predictive maintenance. With the advancement of Industry 4.0 and smart manufacturing, arm robots have put forward higher requirements for ball screws: Higher precision: The demand for nanometer-level positioning accuracy is driving the development of ultra-precision ball screws. Intelligence: "Smart screws" with built-in sensors will become standard. New material applications: The application of ceramic balls and composite materials will further improve performance. Green manufacturing: more environmentally friendly production processes and recyclable designs are valued. As the "precision muscle" of arm robots, the technological progress of ball screws directly determines the performance ceiling of robots. With the development of material science, manufacturing processes and intelligent control technology, ball screws will continue to push arm robots towards higher precision, higher efficiency and more intelligence, providing more powerful automation solutions for modern manufacturing. If you are interested, please contact us, we have the most professional and standardized team technical support.