Calibration plates are key components for ensuring porcelain slab dimensional accuracy and surface quality in roller presses. Correct calibration plate adjustment not only guarantees product quality but also extends equipment service life. This article provides detailed introduction to calibration plate adjustment standard procedures and precision control methods.
Use micrometer to measure multiple points on calibration plate surface, record height values at each point, calculate flatness deviation. Also inspect calibration plate surface for scratches, wear, or deformation.
Based on measurement results, determine adjustment direction and amount:
| Measurement Result | Adjustment Strategy |
|---|---|
| Overall high | Reduce calibration plate thickness or add shims |
| Overall low | Increase calibration plate thickness or reduce shims |
| One end high, one end low | Adjust low-end support point height |
| Center high, both ends low | Check support structure, adjust center support |
Use dedicated adjustment screws for fine adjustment, each adjustment amount should not exceed 0.05mm. After each adjustment, remeasure with micrometer to confirm effect before proceeding.
After confirming calibration plate position is correct, use torque wrench to lock mounting bolts at specified torque. Locking sequence should proceed from center outward in alternating pattern to ensure even force distribution.
After locking, remeasure calibration plate flatness to confirm consistency with pre-locking state. Check for stress deformation.
| Testing Item | Acceptance Standard |
|---|---|
| Calibration plate flatness | ≤0.02mm |
| Upper-lower calibration plate parallelism | ≤0.05mm |
| Product thickness tolerance | ±0.2mm |
| Product flatness | ≤0.5mm/m |
| Possible Cause | Solution |
|---|---|
| Mounting bolts loose | Inspect and retighten, use lock washers |
| Support structure deformation | Check support components, replace if necessary |
| Thermal expansion effect | Measure at similar temperature, adjust thermal expansion compensation |
| Possible Cause | Solution |
|---|---|
| Uneven calibration plate wear | Check calibration plate, grind or replace if necessary |
| Uneven material distribution | Check material distribution system, ensure even feeding |
| Uneven pressure distribution | Check hydraulic system, troubleshoot pressure balance issues |
| Possible Cause | Solution |
|---|---|
| Calibration plate material issue | Replace with high-quality calibration plate |
| Calibration plate surface damage | Grind repair or replace |
| Equipment foundation issue | Check equipment installation levelness and foundation |
GDNOS provides high-quality roller press calibration plates:
View GDNOS Calibration Plate Products →
Q: How often should calibration plate adjustment be performed?
A: Calibration frequency depends on production batches and usage. Recommendations: after new machine debugging, every 5000 sheets, when switching large format products, after equipment relocation, when product dimensional deviation is found. Daily monitoring via online inspection system.
Q: How to determine if calibration plate needs replacement rather than adjustment?
A: Replacement needed when: severe surface wear (flatness exceeds 0.05mm), scratches affecting product surface quality, material deformation unrecoverable, adjustment screws damaged, uneven thickness after long-term use.
Q: What are the advantages of GDNOS calibration plates?
A: GDNOS calibration plates use high-strength alloy steel, hardness HRC55-60, excellent wear resistance. Precision machined for flatness ≤0.01mm, surface roughness Ra≤0.8μm. Multiple specifications available, compatible with SACMI, Keda, and other major machine models.
Need professional technical support? Contact GDNOS: +86 135 1270 0969