Overbending correcting forming method for variable-section arc glue laminated wood member

Abstract

The invention discloses an overbending correcting forming method for a variable-section arc glue laminated wood member and belongs to the field of preparing of glue laminated wood. The method includes the steps including five processes of wood laminate length fixing, adhesive coating, wood laminate profiling modeling, pressurizing sizing and member deep machining; the preparing curvature radius of the variable-section arc glue laminated wood member is determined and the appearance of the variable-section arc glue laminated wood member is ensured according to the number of wood laminates and the design curvature radius of the variable-section arc glue laminated wood member; and the gluing quality of the glue laminated wood member is ensured by setting the minimum pressurizing distance of a distribution type pressing machine. According to the method, the problem that the preparing curvature radius of the variable-section arc glue laminated wood member and the minimum pressurizing distance during multi-point pressurizing are determined only through experience is solved according to the number of the wood laminates and the design curvature radius of the glue laminated wood member and by setting the minimum pressurizing distance of the distribution type pressing machine, the phenomenon that shape rebounding caused after gluing pressure forming of the variable-section arc glue laminated wood member cannot be predicted traditionally is avoided, and the gluing quality of the variable-section glue laminated wood is ensured.

Description

technical field [0001] This patent relates to the preparation of glulam, in particular to a bending correction molding method for arc-shaped glulam members with variable cross-sections. Background technique [0002] Compared with steel structures, the materials used in glulam structures are environmentally friendly, energy-saving, and renewable; compared with reinforced concrete structures, in addition to being environmentally friendly and energy-saving, the main structural components of glulam structures can also be prefabricated in factories to achieve rapid assembly on the construction site. Avoid on-site wet work; compared with traditional log structures, glulam components are formed by finger-jointing lengths, transverse widths, and thickness superimpositions. The unit size of the components is small, so it can be designed and processed into any shape. And the size is not limited. [0003] However, at present, in the processing of curved glulam components with variable...

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Problems solved by technology

Therefore, the radius of curvature required for the preparation of arc-shaped glulam components is determined empirically. Often, the rebound degree of the components cannot be predicted or accurately calculated after the components are prepared. The shape error of the arc-shaped components is relatively large, which is not conducive to ensuring the mechanical properties of the components. During the process, problems such as failure to assemble normally

At the same time, the preparation method of variable-section arc-shaped glulam components is different from the production method of traditional decorative wood products, and also different from the production method of conventional linear glulam components. When determining the inner arc of variable-section arc-shaped glulam components After the multi-point pressurization pressure and spacing, due to the shape of the variable cross-section arc-shaped glulam member, the corresponding outer arc multi-point pressurization pressure and spacing tend to decrease or increase. When the component outer arc multi-point pressurization spacing increases , when the pressure is reduced to the limit value, the glue quality between the component laminates cannot be effectively guaranteed, which will bring serious consequences of unreliable quality of glued wood components

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