A gas shielded wood friction welding method
A technology of friction welding and gas protection, which is applied in the field of wood friction welding devices and gas protection wood friction welding devices, can solve the problems of moisture-sensitive large-section welding interface center strength, etc., to reduce the degree of carbonization, improve strength and water resistance, and improve The effect of water resistance
Active Publication Date: 2018-10-30
TSINGHUA UNIV
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[0008] The purpose of the present invention is to propose a gas shielded wood friction welding device and method in order to overcome the technical problems of the wood welding interface being sensitive to moisture and the central strength of the large section welding interface is low
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[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0027] figure 1 A schematic diagram of the structure and principle of a gas shielded wood friction welding device provided by the present invention, the device includes wood friction welding equipment 1, a vacuum pump 2, a gas cylinder 7 with protective gas, and a closed cavity 3; the wood friction welding The equipment 1 is placed in the airtight chamber 3, the vacuum pump 2 and the gas cylinder 7 containing the protective gas are connected to the airtight chamber 3 through the vacuum valve 5 and the gas valve 6 respectively, and the air release valve 8 and the air pressure are installed above the airtight chamber 3. Table 4. Described protective gas preferably adopts N 2 , CO 2 or Ar.
[0028] Using the gas shielded wood friction welding device of the present invention, the following three different gas shielded wood friction welding methods can be perf...
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The invention provides a gas-shielded wood friction welding device and method and relates to a wood friction welding device and method. The device comprises wood friction welding equipment, a vacuum pump, a gas cylinder filled with protective gas and a hermetic cavity; the wood friction welding equipment is placed in the hermetic cavity; the hermetic cavity is respectively connected with the vacuum pump and the gas cylinder; the protective gas is introduced into the hermetic cavity, air in the hermetic cavity is exhausted, friction welding is performed under the situation that the protective gas is introduced or after vacuum pumping treatment is performed on the hermetic cavity, friction welding is performed under vacuum or negative pressure conditions. The gas-shielded wood friction welding device and method provided by the invention can effectively relieve the degree of carbonization of welding interfaces, improve the intensities of the welding interfaces and realize the water resistance functions of the welding interfaces; negative pressure can enable the pressures of water vapor and volatile gas generated by the welding interfaces to be offset, so that the bonding of the welding interfaces is facilitated. The gas-shielded wood friction welding device and method are particularly suitable for the friction welding among large-section wood.
Description
technical field [0001] The invention relates to a wood friction welding device and method, in particular to a gas shielded wood friction welding device and method, and belongs to the technical field of wood processing. Background technique [0002] Friction welding technology is a high-quality, precise, high-efficiency and energy-saving welding technology, which is increasingly valued and widely used. Wood friction welding is a technology that achieves wood bonding through mechanical friction without any adhesive. Friction welding of wood can be used in structural wood components, furniture and fine woodwork, replacing chemically synthesized adhesives and welding in seconds. The introduction of friction welding technology in the wood industry can reduce environmental pollution and significantly improve economic benefits. [0003] In 1996, Sutthoff et al. achieved the first bonding between wood boards by pressure and frictional heat (German patent, DE 19620273C2). Since 20...
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IPC IPC(8): B23K20/12B23K20/14B27M1/00
CPCB23K20/122B23K20/14B27M1/00
Inventor 田煜尹维鲁鸿宇陶大帅孟永钢
Owner TSINGHUA UNIV