The working conditions of high-speed and low-speed cutting machines vary greatly. If reducers are used interchangeably, it will easily lead to reduced equipment accuracy, shortened service life, and even shaft damage. There are significant differences in core parameters, type selection and transmission structure between the reducers of high-speed and low-speed cutting machines Selection:
1. Features of high-speed cutting machine reducer Selection
High-speed cutting machines pursue high beats, high acceleration and ultimate dynamic response, and the requirements for reducers focus on "light, fast and accurate":
1. Extremely high accuracy and backlash requirements: Under high-speed operation, the return gap (backlash) of the reducer must be extremely small, usually ≤1 arc minute or even lower. Excessive backlash will cause drift, saw cuts or wavy patterns during high-speed positioning.
2. High rigidity and impact resistance: When frequently starting, stopping and reversing at high accelerations such as 3.0G, the reducer must have extremely strong rigidity. For example, a micro-cycloidal reducer with an R-angle tooth arc design is more impact-resistant than a harmonic reducer and will not resonate in a specific speed range.
3. Lightweight and low inertia: In order to match high acceleration, the reducer needs to be small in size and light in weight to reduce the overall motion inertia.
Cutting-edge "direct drive" trend: In the field of ultra-high-speed laser cutting, some high-end models have abandoned traditional reducers and adopted "rotary direct drive motor reducer-less structures" to achieve true zero backlash, high torsional stiffness (more than 10 times improved) and dynamic response.
2. Features of low-speed cutting machine reducerSelection
Low-speed cutting machines (such as cutting thick plates, heavy machinery) focus on heavy load, large torque and long-term operation stability:
1. Torque carrying and overload capacity: The resistance torque is large during low-speed cutting. Selection It is necessary to accurately calculate the required output torque and reserve a sufficient safety factor (usually 1.2-2.5 times) to cope with sudden impacts and overloads during thick plate cutting, and to avoid "small horses pulling big carts" causing shaft breakage.
2. The structural type tends to be heavy-duty: high-rigidity planetary gear reducers or RV (cycloidal pinwheel) reducers are often used. This type of reducer has strong resistance to overload impact and is suitable for heavy-load locations.
3. Thermal load and heat dissipation considerations: Although the speed is low, it is easy to heat up under the continuous operation of large torque. The heat load under continuous working mode needs to be checked to ensure that the temperature rise is within a safe range. If necessary, a heat sink or forced air cooling needs to be installed.
4. Durability and maintenance: Low-speed and heavy-load conditions require high wear resistance of gears. High-strength alloy steel and strict heat treatment processes are usually used, and a good lubrication system is required to reduce friction losses.
