The fin strips of the plate-fin type OEM heater aluminum heatsink are extremely thin and made of soft material. The warping and deformation after cutting are mostly caused by cutting stress, uneven pressing, tension disorder, and equipment accuracy deviation. It is necessary to optimize and rectify from multiple dimensions such as equipment, process, and parameters. Firstly, eliminate the cutting stress deformation. The ultra-thin fin strips will generate instantaneous shear stress during high-speed cutting, and uneven stress distribution will cause wave warping. It is necessary to reasonably reduce the cutting speed and adopt a uniform and low-speed cutting process to avoid sudden stops and starts, variable-speed cutting, and at the same time optimize the tool gap parameters to prevent material compression by the knife edge and reduce mechanical stress residues, thereby reducing the probability of deformation from the root cause. Secondly, adjust the pressure system to ensure balanced pressure. Local wear of the pressure roller, uneven pressure, and deviation of the pressure position will cause asymmetric force on the fin strips during cutting, resulting in excessive permanent warping on one side. It is necessary to thoroughly inspect the wear condition of the pressure rubber rollers, replace the aged and deformed rollers, precisely adjust the left and right pressure, and ensure that the fin strips are evenly and uniformly pressed without local suspension or local overpressure. Thirdly, optimize the tension control logic. Excessive tension during winding and unwinding is prone to stretching the fin strips and causing extension deformation, while too little tension will lead to loose and shaking of the roll material and the appearance of wave patterns. For different material characteristics of aluminum fins and stainless steel fins, dedicated constant tension parameters are set. For thin aluminum fins, micro-tension control is adopted, and for stainless steel fins, the tension is moderately increased to ensure smooth and non-stretched transportation without relaxation. Finally, correct the accuracy of the equipment frame and the knife shaft. Equipment frame tilt, excessive deviation of the knife shaft, and uneven height deviation of the conveying rollers will cause the fin strips to be subjected to biased force during cutting, resulting in regular wave deformation. It is necessary to level the equipment frame, calibrate the coaxiality and radial deviation of the knife shaft, and ensure that the cutting plane is flat and uniform. After process optimization, the finished fin strips are flat without deformation, which can directly meet the requirements of automated stacking and pressing production for the plate-fin type OEM heater aluminum heatsink.
OEM heater aluminum heatsink https://www.yopoelec.com/heater-heat-sink-1.html
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