Planetary gearbox double-sided battlefield: industrial robot joints
1. Micron level positioning accuracy: the "surgical knife" of the robotic arm

Technical requirements: Repeat positioning error ≤ 0.05mm, backlash control ≤ 3 arc minutes

Implementation path:

Adopting a helical planetary gear design, stress is dispersed through multi tooth meshing (such as the three-stage planetary carrier structure of the Vamat FE series planetary gearbox)

Cooperate with pre tightening force adjustment technology to eliminate gear clearance

Case: A certain automobile welding assembly line uses planetary reducers to achieve 3000 welding points per vehicle with an error of<0.03mm, and the welding qualification rate is increased to 99.97%

2. Instantaneous impact resistance: a "steel joint" that can withstand 300% overload

Technical requirements: Instantaneous overload capacity ≥ 300% rated torque, impact resistance life>20000 hours

Material breakthrough:

Gear surface carburizing and quenching treatment (hardness reaches HRC60-62)

The planetary carrier is forged from 40CrNiMoA alloy steel (tensile strength ≥ 980MPa)

Actual test data: After 100000 consecutive 5-ton impact tests, the gear wear of a certain stamping robot joint was less than 8 μ m

3. Compact structural design: creating miracles in every inch

Space challenge: The axial length of the joint needs to be compressed to within 1.5 times the diameter of the motor

Innovative solution:

Integrated planetary carrier design (such as the gearbox and internal ring gear integration scheme of SPB series reducers)

Adopting thin-walled cross roller bearings, the radial size is reduced by 30%

Application example: A certain electronic assembly robot uses a compact reducer to reduce the thickness of the joint module from 120mm to 85mm, achieving precision assembly in a small space

4. Thermal stability: Consistent performance in environments ranging from -40 ℃ to 120 ℃

Temperature control requirement: accuracy fluctuation<0.01mm/℃

Technical solution:

Thermal symmetric structure design (such as the dual cycle oil circuit heat dissipation system of the Vamat FE series)

Using high-temperature lubricating grease (temperature resistance range -50 ℃~150 ℃)

Extreme test: Running continuously for 8 hours in the Northeast Extreme Cold Workshop (-35 ℃), the positioning error only increased by 0.007mm

5. Maintenance free long life: commitment to 20000 hours of trouble free operation

Life indicator: rated life ≥ 20000 hours, maintenance cycle>4000 hours

Longevity password:

The planetary gear set adopts a modified tooth profile (reducing contact stress by 20%)

Fully sealed protection design (IP67 dustproof and waterproof)