High-Efficiency and High-Precision Measurement, Empowering the Robotics Industry
With the rapid development of artificial intelligence technology, the robotics industry is profoundly changing our production models. New types of robots, represented by humanoid robots, not only possess intelligent perception capabilities but also exhibit higher precision and sensitivity in motion control, ensuring excellent balance control. This places high demands on the machining accuracy of motion control components such as RV reducers.
How to efficiently and accurately inspect such products? This issue is gradually gaining attention within the industry. We will focus on this demand and specifically introduce several measurement solutions.
RV Reducer
The RV reducer is commonly used in the field of robotics. Its working principle is mainly based on its unique two-stage reduction structure, a "hybrid" of traditional cycloidal gears and planetary gear transmission devices. The eccentric motion of the gears causes the meshing and disengagement of the rollers and the cycloidal RV teeth, thus imposing high requirements on the machining accuracy and inspection capabilities of the internal components.
1. Eccentric Shaft Measurement Example
EccentricShaft GeometricToleranceInspection
Workpiece Purpose
The eccentric shaft is generally fixed on the motor rotation shaft via an eccentric hole and performs a cam motion when the motor starts. As a primary reduction component of the RV reducer, the eccentric shaft is used for the smooth transmission of power and torque.
Measurement Items
Roundness, Cylindricity, Coaxiality, Shaft Straightness, Eccentricity
Measurement Recommendation
For rotating bearing workpieces like the eccentric shaft, their roundness, cylindricity, and coaxiality significantly impact the overall functionality. Consider using a Roundness/Cylindricity Form Measuring Machine, which can measure geometric tolerances such as roundness, cylindricity, concentricity, coaxiality, perpendicularity, parallelism, and flatness.
Recommended Instrument
CNC Roundness/Cylindricity Form Measuring Machine
Roundtest RA-2200 Series
Product Features
- Equipped with a high-precision rotary table, initial rotation accuracy up to 0.02 μm.
- X-axis uses ceramic guide rails, durable for long-term use.
- The A series features automatic centering and leveling functions, greatly improving measurement efficiency and reducing labor and time costs.
2. RV Cycloidal Gear Measurement Example
RVCycloidalGear ToothProfile #PitchInspection
Workpiece Purpose
The cycloidal gear primarily engages with the pin gear housing and rollers for transmission. It is one of the important components of the RV reducer and has a crucial impact on the overall accuracy, service life, and performance of the robotic arm.
Measurement Items
Cycloidal gear tooth profile, Cumulative pitch, Pitch circle diameter, and Geometric tolerances
Measurement Recommendation
The cycloidal gear is relatively thick and heavy, with teeth on the outer edge. It mainly ensures transmission accuracy through meshing transmission with other components. Its measurement items are numerous and require high precision. Consider using a high-precision CNC Coordinate Measuring Machine (CMM), which can perform traditional contact measurements and also be equipped with a scanning probe for contour scanning, making it an ideal choice for measuring such workpieces.
Recommended Instrument
High-Precision CNC Coordinate Measuring Machine
STRATO Apex Series
Product Features
- Capable of simultaneous dimensional measurement, geometric tolerance evaluation, and tooth profile contour scanning.
- Maximum Permissible Error (MPE) as low as 0.7 μm meets the high-precision measurement requirements of cycloidal gears.
- High driving speed significantly reduces measurement time and improves measurement efficiency.
Tips
Use the continuous scanning probe SP25M for continuous scanning measurement. The obtained data is analyzed through SCANPAK software, which supports contour comparison using CAD design values as a reference, thereby generating contour error (as shown in the figures below).
3. Metal Pin Measurement Example
MetalPin HardnessInspection
Workpiece Purpose
Metal pins are common components, often used in RV reducers and robot automatic tool changers.
Measurement Items
Rockwell Hardness
Measurement Recommendation
In high-precision robotic transmission fields, metal pins need characteristics such as impact resistance and wear resistance to maintain the fatigue strength and stiffness of the RV reducer, thereby ensuring its service life. Common hardness parameters include Brinell, Rockwell, and Vickers hardness. Rockwell hardness corresponds to the hardness parameter of hard steel and alloy material workpieces themselves. A Rockwell Hardness Tester can be used to evaluate the hardness.
Recommended Instrument
Rockwell Hardness Tester
HR-530 Series
Product Features
- Convex nose-type indenter shaft structure allows direct testing on shell and ring-shaped workpieces.
- Supports data output via USB and other methods.
- Displays tolerance judgment results via color indication.
- Enables automatic switching of test forces, ensuring higher test repeatability.