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A preparation method of curved glulam components with shape springback compensation

A rebound compensation, glulam technology, applied in chemical instruments and methods, bonding of wooden veneers, other plywood/plywood appliances, etc., can solve problems such as inability to meet subsequent processing

Active Publication Date: 2019-02-05
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to make the amount of rebound after the pressure is removed in the preparation of the component is exactly the difference between the design and the manufacturing radius of curvature is the key to the preparation technology. , Curved glulam member design curvature radius parameters are related, the existing technology can not meet the requirements of these variable changes, so that there is often a large error between the prepared shape of the curved glulam member and the design shape, which cannot meet the requirements of subsequent processing Require

Method used

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  • A preparation method of curved glulam components with shape springback compensation
  • A preparation method of curved glulam components with shape springback compensation
  • A preparation method of curved glulam components with shape springback compensation

Examples

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Embodiment 1

[0034] A method for preparing curved glulam components with shape springback compensation, including wood plywood gluing, profiling, pressurization and pressure relief curing, and these processes are all carried out under the environmental conditions of a temperature of 15°C and a relative humidity of 50%. Next complete.

[0035] The design radius of curvature of the European Scots pine arc-shaped glulam member is 111680mm, the chord length is 6600mm, and the section height is 450mm. The number of wooden laminates is 12, and the thickness of each layer is 37.5mm. The moisture content of the wood is 6%, which is compensated by springback deformation. According to the method, the radius of curvature for the preparation of curved glulam members is determined as:

[0036] The radius of curvature for the preparation of curved glulam components = the design radius of curvature of curved glulam components × (1-1 / number of wooden laminates) = 111680mm × (1-1 / 12) = 102373mm

[0037] A...

Embodiment 2

[0045] A method for preparing curved glulam components with shape springback compensation. The steps are the same as those in Example 1, including wood laminate gluing, profiling, pressurization and pressure relief maintenance. These processes are all carried out at a temperature of 18°C ​​and a relative humidity of 70% complete under ambient conditions.

[0046] The design radius of curvature of Douglas-fir arc-shaped glulam members is 4800mm, the chord length is 5500mm, and the section height is 260mm. The number of wooden laminates is 7 layers, and the thickness of each layer is 37.1mm. The compensation method determines the curvature radius of the curved glulam member as:

[0047] The radius of curvature for the preparation of curved glulam components = the design radius of curvature of curved glulam components × (1-1 / number of wooden laminates) = 4800mm × (1-1 / 7) = 4114mm

[0048] The glue coating of the wooden laminate is 280g / m2 on one side 2 , the glue pressing time ...

Embodiment 3

[0053] A method for preparing curved glulam components with shape springback compensation, the steps are the same as those in Example 1, including wood plywood gluing, profiling, pressurization and pressure relief curing, these processes are all carried out at a temperature of 20°C and a relative humidity of 85% complete under ambient conditions.

[0054] The design radius of curvature of the southern pine arc-shaped glulam member is 5000mm, the chord length is 5800mm, and the section height is 375mm. The number of wooden laminates is 10, and the thickness of each layer is 37.5mm. The compensation method determines the curvature radius of the curved glulam member as:

[0055] Design radius of curvature of curved glulam components×(1-1 / number of wooden laminates)+[design radius of curvature of curved glulam components-design radius of curvature of curved glulam components×(1-1 / number of wooden laminates)] ×0.15=5000×(1-1 / 10)+[5000-5000×(1-1 / 10)]×0.15=4500+500×0.15=4575mm

[0...

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Abstract

The invention discloses a manufacturing method for an arc-shaped laminated wood component with shape spring-back compensation, and belongs to the field of laminated wood preparation. The manufacturing method comprises the following steps of: gluing wood laminated boards, profiling, pressurizing and releasing pressure and maintaining, wherein manufacturing curvature radius of the laminated wood component is determined according to number of the wood laminated boards, a designed curvature radius of the laminated wood component and density of wood. According to the manufacturing method, which is determined according to the number of the wood laminated boards, moisture content of the wood and bending degree of laminated wood, for the arc-shaped laminated wood component with shape spring-back compensation, the problems that the manufacturing curvature radius of the laminated wood component is only determined according to experience, and shape spring-back, caused by elasticity, viscoelasticity and viscous properties of wood, of the glued and shaped arc-shaped laminated wood component is caused are solved, and therefore, precision and stability of the shape of the arc-shaped laminated wood component are guaranteed.

Description

technical field [0001] This patent relates to the field of glued wood preparation, in particular to a method for preparing curved glued wood components with shape springback compensation. Background technique [0002] Compared with steel structures, glulam structures are made of wood, which is carbon-sinking, environmentally friendly, energy-saving, and renewable; compared with reinforced concrete structures, glulam structures not only use materials that are environmentally friendly and energy-saving, but can also be prefabricated in factories to achieve rapid assembly at the construction site. Avoid on-site wet work, and the material is light, without heavy hoisting equipment; compared with traditional log structures, glulam components are made by finger-jointing length, horizontal width, and thickness superimposition and gluing, and the component unit size is smaller , so it can meet the needs of structure, architecture and function, and can be designed and prepared into a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27M3/00B27D1/08B27D5/00B27H1/00B32B37/10B32B37/12
CPCB27D1/08B27D5/00B27H1/00B27M3/00B32B37/10B32B37/12
Inventor 岳孔刘伟庆程秀才贾翀陆伟东汤丽娟
Owner NANJING TECH UNIV
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