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Preparation method of variable-section curved glulam components with high shape accuracy

A variable-section, glulam technology, applied in the joining of wooden veneers, chemical instruments and methods, other plywood/plywood appliances, etc., can solve problems such as inability to eliminate errors

Active Publication Date: 2018-08-31
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 member is exactly the difference between the design and the manufacturing radius of curvature is the key technology in the preparation process. The number of wooden laminates and the design curvature radius parameters of variable-section arc-shaped glulam members are related. The relatively large error will bring irreparable negative effects on the positioning and assembly of arc-shaped components with variable cross-section in the later stage

Method used

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  • Preparation method of variable-section curved glulam components with high shape accuracy
  • Preparation method of variable-section curved glulam components with high shape accuracy
  • Preparation method of variable-section curved glulam components with high shape accuracy

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A method for preparing a variable-section arc-shaped glulam member with high shape accuracy, the steps include four processes of wood laminate length fixing, gluing, profiling, and pressure setting, and the four processes are all carried out at a temperature of 18°C ​​and a relative humidity of 60% complete under ambient conditions.

[0036] For moisture content of 8%, air-dry density of 0.45g / cm 3 The design radius of curvature of variable-section arc-shaped glulam members is 8000mm, and the span in the arc area is 3.5m. The number is 23 layers, and the thickness of each layer of wooden laminates is 36.5mm, so the reference for the radius of curvature of the curved glulam member with variable cross-section is:

[0037] The design radius of curvature of variable-section arc-shaped glulam components × (1-1 / number of wooden laminates) = 8000 × (1-1 / 23) = 7652mm

[0038] The curvature radius of the curved glulam member with variable cross-section is determined as:

[00...

Embodiment 2

[0045] The method for preparing a variable cross-section arc-shaped glulam member with high shape accuracy, its steps are the same as in Example 1, including four processes of wood laminate length fixing, gluing, profiling and pressure setting, and the four processes are all performed at a temperature of 22 °C and a relative humidity of 70%.

[0046] For moisture content of 12%, air-dry density of 0.40g / cm 3 The design radius of curvature of variable-section arc-shaped glulam members is 7200mm, and the span in the arc area is 4.9m. The number is 22 layers, and the thickness of each layer of wooden laminates is 35.4mm, so the reference for the radius of curvature of the curved glulam member with variable cross-section is:

[0047] The design radius of curvature of variable-section arc-shaped glulam components × (1-1 / number of wooden laminates) = 7200 × (1-1 / 22) = 6872mm

[0048] The curvature radius of the curved glulam member with variable cross-section is determined as:

...

Embodiment 3

[0052] The method for preparing a variable cross-section arc-shaped glulam member with high shape accuracy, its steps are the same as in Example 1, including four processes of wood laminate length fixing, gluing, profiling and pressure setting, and the four processes are all performed at a temperature of 28 °C and a relative humidity of 80%.

[0053] For a moisture content of 10% and an air-dry density of 0.58g / cm 3 The design radius of curvature of variable-section arc-shaped glulam members is 6000mm, and the span in the arc area is 2.8m. The number is 25 layers, and the thickness of each layer of wooden laminates is 36.0mm, so the radius of curvature of the curved glulam member with variable cross-section is:

[0054] The radius of curvature of the preparation of variable-section arc-shaped glulam components = the design curvature radius of variable-section arc-shaped glulam components × (1-1 / number of wooden laminates) = 6000 × (1-1 / 25) = 5760mm

[0055] The glue coating ...

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Abstract

The invention discloses a manufacturing method for a variable-section arc-shaped laminated wood component with high shape precision, and belongs to the field of laminated wood preparation. The manufacturing method comprises the following steps of: keeping length of wood laminated boards constant, gluing, profiling and pressing-shaping, wherein manufacturing curvature radius of the variable-section arc-shaped laminated wood component is determined according to number of the wood laminated boards, a designed curvature radius of the variable-section arc-shaped laminated wood component and density of wood. According to the manufacturing method, which is determined according to the number of the wood laminated boards, the designed curvature radius of the variable-section arc-shaped wood laminated wood component and the density of the wood, for the variable-section arc-shaped laminated wood component with high shape precision, the problems that the manufacturing curvature radius of the variable-section arc-shaped 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 variable-section arc-shaped laminated wood component is caused are solved, and therefore, precision and stability of the shape of the variable-section arc-shaped laminated wood component with high shape precision are guaranteed.

Description

technical field [0001] This patent relates to the preparation of glued wood components, in particular to a method for preparing curved glued wood components with variable cross-section and high shape accuracy. Background technique [0002] Compared with the traditional log structure, the glulam structure is prepared by the finger-jointed length, transverse width, and thickness of the glulam member. And prepared into any shape and size to meet the needs of structure and architectural modeling, especially the curved glulam components with variable cross-section, which can better highlight the architectural effect of glulam structures and save wood consumption, and are favored by architects and construction units favor. In recent years, due to the continuous advancement of my country's energy saving and emission reduction, green building technology and construction industry modernization, the development momentum of glued wood structures in my country has been rapid. [0003]...

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 岳孔刘伟庆程秀才陆伟东贾翀汤丽娟
Owner NANJING TECH UNIV