Method for measuring and calculating ultrasonic welding-cementing composite interface friction coefficient
A technology of ultrasonic welding and interface friction, applied in the direction of measuring devices, instruments, mechanical devices, etc., can solve short-term problems
Pending Publication Date: 2021-10-26
ANHUI UNIV OF SCI & TECH
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However, the ultrasonic welding process is extremely short, and the measurement and calculation of the friction coefficient during the welding process has been in the blank.
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[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0038] Ultrasonic welding is a horizontal vibration in a single direction, and the area of the solder joint is smaller than the contact area. Therefore, the contact problem of the interface can be considered as a two-dimensional elastic half-plane problem. The stress analysis model at any position in the contact plane is as follows: figure 1 shown.
[0039] In some examples of the present invention, a method for measuring ultrasonic welding-gluing composite inter...
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The invention discloses a method for measuring and calculating an interface friction coefficient in an ultrasonic glue welding technology composite process, and belongs to the field of ultrasonic welding. The method for measuring and calculating the ultrasonic welding-cementing composite interface friction coefficient comprises the following steps that a first welding piece is machined to be the same as a welding spot in size, and the first welding piece is fixed to the top end of a welding head through a pre-pressing and cementing technology; a second welding piece is fixed to the base plate through bolts, and high-precision strain gauges are arranged on the two sides of a welding spot of the second welding piece; the welding head is moved to enable the first welding piece to press the second welding piece, the ultrasonic glue welding process is implemented, and the real-time strain of the position, close to the welding spot, of the second welding piece is obtained through the high-precision strain gauge; according to an elastic semi-plane stress analysis model, the stress borne by the corresponding position is reversely solved through the real-time strain close to the welding spot, and then a function expression among the strain, the welding pressure and the friction coefficient is established; and according to a corresponding integral algorithm, the friction coefficient is solved.
Description
technical field [0001] The invention relates to the field of ultrasonic welding, in particular to a method for measuring and calculating the interface friction coefficient in the composite process of ultrasonic glue welding technology. Background technique [0002] Ultrasonic welding-adhesive composite connection technology is an international advanced connection technology. The adhesive layer will produce complex flow behavior under ultrasonic vibration, heat, and force. This is a significant scientific feature that is different from other adhesive welding technologies. , the flowing adhesive layer not only directly affects the mechanisms of interface friction, heat generation and heat transfer, stress distribution, plastic deformation, etc., but its final distribution is the core factor that determines the quality and fatigue life of composite joint solder joints. Since the ultrasonic welding process is short and the adhesive layer inside the solder joint cannot be directl...
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IPC IPC(8): G01N19/02
CPCG01N19/02Y02T90/00
Inventor 赵德望季家东赵坤民谢静
Owner ANHUI UNIV OF SCI & TECH