3. Removal of defects - If between the defect and the clean side of the board sufficient distance to provide a minimum width of the material, the defect is better to remove the subsequent operation of the longitudinal cutting, thus better to have a defect in plot with the mean (not the shortest) to the longitudinal cutting the workpiece can be obtained a minimum length - When handling the machine for cross cutting should be 9.5 different lengths of blanks, ie short, medium and long billets, each of length - is an option for the machine operator, it is necessary to ensure that the operator has always been possible to process the length of choice - Flexibility in the decision making process for choosing length: if the board is processed at great length (the most valuable timber), but the loss of output is high, it is wise to cut to the middle or small length. 5. Allowance for trimming ends - Allowance should be efficient and selected depending on the purpose of harvesting and the existing defects in many industries declined from the standard allowance of 25.4mm, panel for panel 19mm is sufficient, but for the whole sliced Shield - 12.7mm, with a must be considered defective (for example, with a strong cross-crook can not understate the allowance, as it may cause angular slices). 6. Grouping in length - the length grouping is used in order to save space and due to the restrictions on the sorting facilities, reduces the yield of finished products and possibly should not be used frequently - to use a rule of grouping is desirable only for pieces longer than 762mm, as at This loss is much smaller, for example, by grouping pieces of length 508 and 533 mm because of an overvalued by 25.4 mm allowance for 508-mm billets loss in yield was 5%, by grouping pieces of greater length 1270 mm and 1295 losses much lower (2%). Increased productivity at work on a manual lathe prodolnopilnom, standing in line after poperechnopilnogo.
Because this operation erases most of the defects, timber losses are substantial compared with other operations. 1. Minimizing the thickness of the cut edges of the cut edge should not exceed the thickness of the saw blade. Ideally, the amount of timber to be cut sufficient to ensure the cleanliness and flatness of the edge. For quality of cut does not need to drink came in a deep timber. In this case you should be very careful to avoid dropping the board due to incorrect use saws or processing board with a defect neprostroga or warping.
2. The direction of cutting through the defect handling of drinking must pass through the edge of the defect, rather than pure wood, adjacent to the defect. Obviously, must pay attention to the slanted fibers, which are often surrounded by swirls. 3. Joint sawing pieces of standard and arbitrary width of workpieces only fixed-width leads to great losses timber, because rarely corresponds to the width of the boards installed (fixed). Performance can be improved if the board cut the same length in different widths for later pasting. Example 1. On prodolnopilnom machined workpiece width 152 mm, without defects. Requires a timber of fixed width and arbitrary width 57mm. There are several ways of cutting a board.
Because this operation erases most of the defects, timber losses are substantial compared with other operations. 1. Minimizing the thickness of the cut edges of the cut edge should not exceed the thickness of the saw blade. Ideally, the amount of timber to be cut sufficient to ensure the cleanliness and flatness of the edge. For quality of cut does not need to drink came in a deep timber. In this case you should be very careful to avoid dropping the board due to incorrect use saws or processing board with a defect neprostroga or warping.
2. The direction of cutting through the defect handling of drinking must pass through the edge of the defect, rather than pure wood, adjacent to the defect. Obviously, must pay attention to the slanted fibers, which are often surrounded by swirls. 3. Joint sawing pieces of standard and arbitrary width of workpieces only fixed-width leads to great losses timber, because rarely corresponds to the width of the boards installed (fixed). Performance can be improved if the board cut the same length in different widths for later pasting. Example 1. On prodolnopilnom machined workpiece width 152 mm, without defects. Requires a timber of fixed width and arbitrary width 57mm. There are several ways of cutting a board.
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