Measurement of Thermal Residual Strain Induced During the Hardening of a Sheet Metal and Reinforced Composite by Digital Shearography

2005 ◽  
Author(s):  
Praveen R. Samala ◽  
Sheng Liu ◽  
Lianxiang Yang
Keyword(s):  
Sheet Metal ◽  
Residual Strain ◽  
Reinforced Composite

Rapid Electromagnetic Induction Bonding of Composites, Plastics, & Metals

1988 ◽  
Vol 124 ◽  
Author(s):  
John D. Buckley ◽  
Robert L. Fox
Keyword(s):  
Low Power ◽  
Sheet Metal ◽  
Electromagnetic Induction ◽  
Metal Structures ◽  
Bonding System ◽  
Reinforced Composite ◽  
Entire Structure ◽  
Standard Press

ABSTRACTA rapid electromagnetic induction bonding system has been developed that joins composites, plastics, metals, and combinations of these materials. The equipment is self-contained, low power (100–400 watts) and portable. Gangs of bonders have been used as a seem welder to rapidly join plastic reinforced composite and sheet metal. Structures can be bonded in a factory or in the field. Bonding times for laboratory specimens have been cut by a factor of 10 to 100 times compared to standard press or autoclave bonding. This type of equipment allows for applying heat directly to the bond lines and/or the adherends without heating the entire structure, supports, and fixtures of a bonding assembly.The bonder's portability and low power requirements allow for its use on site in any type of climate with power supplied by a variety of portable sources.

ИССЛЕДОВАНИЕ ТОЧНОСТИ ДЕТАЛЕЙ, ПОЛУЧАЕМЫХ ПРИ РАЗДЕЛИТЕЛЬНЫХ ОПЕРАЦИЯХ В ПЕРЕНАЛАЖИВАЕМЫХ ШТАМПАХ

2018 ◽  
pp. 52-63
Author(s):  
Е. А. Фролов ◽  
В. В. Агарков ◽  
С. И. Кравченко ◽  
С. Г. Ясько
Keyword(s):  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Balance Method ◽  
Experiment Planning ◽  
Practical Recommendations

To determine the accuracy of the readjustable punches for separating operations (perforation + punching out) of sheet-metal forming, the accuracy parameters were analyzed using the random balance method using the method of experiment planning. Analytical dependencies are obtained to determine the values of deviation of the outer and inner contour dimensions of perforated and punched out sheet parts. From the dependencies obtained, it is possible to estimate and predict the value of deviation in the dimensions of the resulting part at any time during the operation of the punch. Practical recommendations on the calculation of the actuating dimensions of the working elements (stamping punch, matrix) of readjustable punches are offered.

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