Several methods for centering and cutting logs
Due to the irregular shape of the wooden segments, all the broken veneers and narrow long veneers are obtained before being spirally cut into cylinders. Only after being screwed into a cylinder, a continuous strip-shaped veneer can be obtained, both in number and length. It is related to the diameter of the cylinder. For the wood segment, the diameter of the cylinder is the largest and the continuous veneer is obtained. Therefore, to cut the log segment, the center must be determined beforehand.
Centering, it can achieve the following purposes:
Increase the yield of the veneer and reduce the number of pieces.
Improve the quality of the board.
Reduce the labor consumption of veneer repair and glue work, and improve economic efficiency.
Convenient for continuous production.
The centering of the wood section can be determined manually or mechanically, but firstly, the two centering reference sections are determined on the length of the wood section, and then a center point is determined on each section, and the connection of the two center points is the wood section. The center line of the turn.
Manual centering can only be estimated by visual inspection and experience, and the accuracy is poor. When working, first set the small head, and then set the big head according to the shape and bending of the wooden section.
Mechanical centering can be determined by calculation. There are currently several centers in production.
Three-point centering: Determine the center of the section by using three points that intersect at a 120-degree angle and are always equidistant from the center of the swing.
Two right angle steel Yiding Center: Using two right angle steels, the upper steel can be rotated left and right, so that the right angle of the intersection and the center of rotation always maintain the same distance to determine the center of the section.
Four-point centering: Use two pairs of symmetrical points and keep the symmetrical points at the same distance from the future center of rotation.
Halo centering: The concentric multi-ring halo formed by the halo generator is projected onto the end of the wood segment so that the center of the halo coincides with the center of the inscribed cylinder of the wood segment, and the center of the halo is the inscribed cylinder of the wood segment. center of.
The above several mechanical centers can be completed on the centering machine.
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