Cylinder Concentricity Measurement Using Laser Light-Transmittance Alignment

The patent replaces the traditional mechanical steel wire drawing method with an optical measurement system. A laser transmitter emits a laser beam that passes through multiple light-transmittant plates mounted on the cylinder sections. The laser beam provides a precise reference line for measuring concentricity, eliminating the mechanical contact and deviation issues inherent in the steel wire method while maintaining operational simplicity.

The patent uses light-transmittant plates with light holes that create optical copies or projections of the reference axis. The laser beam passes through these plates to establish precise reference lines at different positions along the cylinder sections, allowing accurate concentricity measurement without direct mechanical contact.

The patent replaces the simple but unreliable mechanical steel wire system with an optical measurement system using laser beams and light-transmittant plates. This substitution maintains relative equipment simplicity while dramatically improving measurement reliability and reducing product disqualification rates due to measurement errors.

The patent establishes a feedback mechanism where the laser beam passes through multiple light-transmittant plates and the alignment or misalignment of the beam with the light holes provides immediate visual feedback on concentricity. This allows operators to detect and correct deviations before welding, ensuring consistent product quality.

The patent performs preliminary concentricity detection using the laser-based optical system before welding operations. By accurately measuring and adjusting concentricity in advance, the system prevents defects that would require costly reprocessing later, thereby reducing overall manufacturing time and cost despite higher initial equipment investment.

The patent replaces the low-cost but inaccurate mechanical steel wire method with a higher-initial-cost optical system that eliminates reprocessing needs. The laser-based measurement system provides such accurate concentricity detection that it prevents product disqualification and the associated reprocessing costs, making it more economical in the long run.