4results about How to "Reduce crack phenomenon" patented technology

This invention discloses an ultrasonic vibration-assisted full-domain transient cladding device and method in the field of surface strengthening technology for components. The cladding chamber is equipped with an inert gas cylinder, an ultrasonic generator, and a vacuum pump on its exterior. Inside the cladding chamber, from top to bottom, are arranged an ultrasonic vibrating head, a perforated graphite felt, coating powder, a workpiece, and a third telescopic motor. The top surface of the workpiece is covered with a layer of coating powder. The perforated graphite felt has through-holes, and an ultrasonic vibrating head extends into one of the holes in the perforated graphite felt. Using air as a carrier, ultrasonic vibration is transmitted to the cladding layer. The workpiece itself does not vibrate, allowing the metal dendrites in the cladding layer to fracture during metal crystallization, promoting the growth of new crystal nuclei and achieving grain refinement. After the cladding layer is formed, the DC power supply is turned off, but the ultrasonic vibrating head continues to operate. The cladding layer of the workpiece impacts the ultrasonic vibrating head, forging the cladding layer and further improving its plasticity and mechanical properties.

The application discloses an erosion-resistant ceramic crucible containing magnesium oxide for smelting of aluminum-lithium alloy and a preparation method thereof, and belongs to the technical field of refractory materials. White corundum, cordierite, Cr2O3, BaF2, CaF2, ZrO2 and TiO2 are mixed to form premix; after the premix, mixed additives, water and grinding balls are mixed and ground, the mixed slurry is obtained through aging; the mixed slurry is poured into a gypsum mold to be dehydrated to obtain a green body, the green body is sequentially subjected to drying treatment and isostatic pressing treatment to obtain a pretreated green body; and the pretreated green body is sequentially subjected to vacuum sintering and plasma spraying to obtain the erosion-resistant ceramic crucible. The erosion-resistant ceramic crucible prepared by the application has good resistance to aluminum-lithium alloy erosion when smelting the aluminum-lithium alloy.

The invention discloses a mobile phone display screen substrate laser cutting device with low thermal impact, and specifically relates to the technical field of display screen processing. The invention provides a gas introduction component and a cooling unit. After nitrogen is filled, low-temperature nitrogen flows from the surrounding area to the cutting area, absorbs heat and becomes high-temperature nitrogen. The high-temperature nitrogen rises and flows to the surrounding area, and flows back to the cutting area after being cooled again. Nitrogen forms convection around the cutting area, and the heat is continuously taken away from the cutting area by the convection nitrogen, so as to achieve the effect of rapid cooling. The top surface of the display screen substrate is firstly cooled and cooled in a rolling manner before laser cutting, so as to reduce the temperature of the display screen substrate, reduce the risk of thermal deformation and thermal damage, increase thermal stability, and thus improve processing accuracy. The remaining two cooling rollers alternately reach the bottom position, contact the cooling roller after heat conduction through the heat absorption roller, guide the heat dissipation, facilitate alternating use, and improve heat dissipation efficiency.

The present application discloses a periscope camera module, which includes at least one optical lens, a lens barrel and at least one lens accommodated in the lens barrel, the lens barrel includes a lens barrel body and a support portion, the support portion protrudes from the lens barrel body along a first direction, the support portion includes a first surface and a second surface opposite to each other along a second direction, and an opening connecting the first surface and the second surface along the second direction, the second direction being perpendicular to the first direction; at least one lens seat, at least one optical lens is arranged on at least one lens seat, at least one lens seat includes a receiving groove facing the supporting portion, a gap is provided between the supporting portion and the receiving groove, and at least a part of the supporting portion is spaced between the gap and the opening; and a glue material is at least partially filled in the gap and the opening to fix at least one optical lens to at least one lens seat. Thus, the shrinkage phenomenon of the supporting portion itself is reduced while reducing the problem of stress concentration, effectively avoiding deformation of the lens barrel, and improving the imaging stability of the periscope camera module.