How to balance weights when processing eccentric parts on a heavy-duty lathe?

When processing eccentric parts on a heavy-duty lathe, the counterweight needs to be achieved through the following steps:

I. Principle of Counterweight

When eccentric parts rotate, they generate centrifugal force, which needs to be balanced by counterweights. The core formula is:

‌G₁r₁ = G₂r₂‌

G₁, G₂ : Unbalanced part and counterweight weight

r₁, r₂ : The distance from the center of gravity to the center of rotation

Ⅱ. Counterweight Method

static equilibrium method ‌ (low-speed processing)

Shift the workpiece to neutral and rotate it, then adjust the counterweight position to static balance ‌

It is suitable for flat plate-shaped or low-speed rotating workpieces

 dynamic balancing method ‌ (high precision requirements)

Use a dynamic balancing machine to detect and accurately calculate the counterweight value ‌

The eccentric weight needs to be decomposed to the imaginary planes at both ends (such as Q₁', Q₂').

Ⅲ. Counterweight Implementation

 counterweight type ‌ : block counterweight (fixed with screws), cast counterweight (directly cast), ring counterweight

 Fine-tuning ‌ : Install the fine-tuning counterweight through the T-slot to precisely adjust the balance

Iv. Verification and Adjustment

Before grinding, the balance effect should be checked on a heavy vehicle to ensure the stable rotation of the eccentric shaft

After processing, remeasure the eccentricity to verify the counterweight effect ‌