Side Cutter 61L1-3022 Earth Moving Equipment Spare Parts

Steps for inspecting the pitch of bucket teeth in construction machinery

The following are the standardized operation steps for inspecting the pitch of bucket teeth in construction machinery, covering three commonly used methods:

1. Contact measuring tool testing method ‌ (applicable to on-site rapid testing)

Cleaning location ‌

Thoroughly clean the impurities on the meshing surface of the bucket teeth and stably fix the bucket teeth to be tested on the detection platform.

The reference tooth is selected as ‌

Select a single reference tooth and use a vernier caliper to measure the distance between the tooth profiles on both sides as the initial nominal value.

Measure ‌ tooth by tooth

Measure the adjacent tooth pitches in sequence along the tooth width direction and record the deviation from the nominal value (note to avoid areas with severe wear).

2. Lead compression method ‌ (with emphasis on post-service wear inspection)

Lead wire layout ‌

Cut the lead wire with a diameter slightly smaller than the expected gap (recommended: φ0.5-1mm) and place it parallel in the meshing area of the non-working tooth surface of the bucket teeth.

Simulated meshing ‌

Slowly rotate the gear seat mechanism to compress the lead wire. Rotate continuously for ≥1 turn to ensure full pressing.

Thickness measurement ‌

Remove the deformed lead wire and measure the thickness at the thinnest point with a micrometer, which is the actual increment of the tooth pitch (take the average of three points).

Iii. Instrument Testing Method ‌ (High-precision laboratory solution)

Universal tooth measuring instrument operation ‌

Install the bucket teeth on the mandrel and adjust the distance between the two measuring heads to be slightly less than the nominal tooth pitch

The tooth profile is made to closely adhere to the probe by the traction of the heavy hammer, and the relative deviation value is read tooth by tooth.

Coordinate measuring machine scheme ‌

Collect 15 to 20 discrete points (with encryption near the indexing circle) in the working section of the tooth profile

Fit the actual tooth profile curve using cubic spline functions and calculate the difference from the theoretical tooth pitch.

Iv. Data Processing and Judgment ‌

Parameter ‌ ‌ calculation method ‌ ‌ standard basis ‌

Single pitch deviation Δf youdaoplaceholder0 = measured value - nominal value GB/T 25628-2023

Cumulative pitch error F <s:1> = max(ΣΔf <e:1>)-min(ΣΔf <e:1>)

Wear unevenness δ=(maximum value - minimum value)/ average value ×100%

Key points of execution ‌ : New bucket teeth shall be determined in accordance with the allowable tolerance of GB/T 25628; The remaining service life of old teeth should be evaluated in combination with the unevenness of wear.