Image-based online measurement method of tire tread winding thickness

Abstract

The invention discloses an image-based online measurement method of tire tread winding thickness. The image-based online measurement method of tire tread winding thickness includes the steps that first, a plurality of cameras are horizontally placed to photograph the edge of a tire tread at the same time, the size of pixels is determined, and the range of the tire tread needing to be acquired by each camera is set; second, before winding begins, all the cameras simultaneously acquire image data of the tire tread in the tire tread rotating process, and the coordinates of the original thickness of the tire tread are obtained; third, after winding begins, the coordinates of the edge of the tire tread are updated in real time with the same method and compared with the edge coordinates of the original thickness of the tire tread for calculation, and then the winding thickness of the tire tread is obtained. Compared with the prior art, contact type measurement is not needed, a tire tread line can be measured at a time, and the tire tread winding efficiency is improved.

Description

(1) Technical field: [0001] The invention relates to detection in the tire manufacturing process, in particular to an image-based on-line measurement method for tread winding thickness. (two) background technology: [0002] Tire building is the most critical link in the tire production process, and accurate measurement of the actual winding thickness is the key to ensuring the shape and quality of the winding. Traditional winding machines use cylinders, sliding sleeve ball bearings and measuring mechanisms to calculate the winding thickness. When the rubber strip is wound around, the diameter of the green tire becomes larger, the slider supporting the measuring head retreats, and the analog quantity change generated by the measuring mechanism is fed back to the computer through the high-speed counter to calculate the thickness change. When the quality of the rubber strip is stable, the winding quality is proportional to the winding volume, and the winding quality can be gua...

AI Technical Summary

Problems solved by technology

[0003] 1. When the pressure of the telescopic cylinder of the measuring head is high, the rollers of the measuring head press more rubber strips, which will make the actual winding thickness larger than the measured value

[0004] 2. The paranoid direction of the measuring head is opposite to the winding direction, so the measurement of the measuring head lags behind the actual thickness for a period of time. The large size causes the measuring head to be blocked by the previously wound film and cannot move along the axial direction of the winding drum, which may cause grooves or even bend the sliding rail of the measuring head on the wound tread.

[0005] 3. If the movement speed of the winding car along the axial direction of the winding drum is too slow, it will take a long time to wind a single tire, and the production efficiency will be low, and there may be many small grooves due to the exhaust roller pressing on the rubber strip for too long, and the winding tire Surface shape is not smooth and coherent

However, like the above-mentioned traditional measurement methods, it is impossible to obtain the thickness information of one tread line at one time point at one time, but can only measure the thickness information of one tread point at one time point

Images