60results about How to "Dimensional accuracy is easy to control" patented technology

The invention discloses a brake disc. The brake disc is used for a brake system of a motor vehicle, rail traffic and an aircraft. The brake disc comprises a brake disc body; the brake disc body is analuminium alloy brake disc body; a wear resistant layer is compounded on each of the two working surfaces of the aluminium alloy brake disc body; the wear resistant layers are ceramic-high temperatureresistant metal composite reinforcement material wear resistant layers; the ceramic-high temperature resistant metal composite reinforcement material wear resistant layers are metallurgical combinedwith the aluminium alloy brake disc body through an extruding casting process; the brake disc disclosed by the invention is light in weight, high in strength, good in wear resistance, good in radiating property and long in service life; the weight and the service life of the brake disc are close that those of a carbon-ceramic brake disc; the machining cost and the maintenance cost are low; the service life is over three hundred thousand kilometres; the using cost is close to ductile iron brake disc; the passage capacity of the motor vehicle, the rail traffic and the aircraft can be improved, and the brake distance can be shortened; the safety is improved; and the brake disc is suitable for large-batch production.

The invention belongs to the overall blade disk technology of turbines and relates to an adjustment structure and method for the inherent frequencies of blades of the overall blade disk of a turbine. Firstly, the initial inherent frequencies of the blades of the overall blade disk of the turbine are measured; then, according to the measured frequencies, the excitation frequency of periodic pulsation of airflow or the result of dynamic stress measurement is combined and the blade frequency needing to be adjusted is calculated, so that the inherent frequency of each stage of the blades can have safe resonance frequency margin; then, according to the blade frequency needing to be adjusted, the space between every two blades of the overall blade disk is slotted, and the radial depth of each slot is determined according to the requirements of adjusting the frequency; a stop hole is formed in each slot bottom, and a pin is mounted in each stop hole. The structure and the method effectively reduce the inherent frequencies of the blades and change the stiffness, modes of vibration and vibration stress distribution of the blades, and the blades do not resonate or the important mode of vibration of resonance of the blades is tuned out the range of working speed. The structure and the method are simple and easy to operate and significant in frequency modulation effect, are easy to control size precision, and can meet actual requirements.

The cathode system for conductive FRP electric demister is used in the acid mist removal device in the mercury-containing smelting flue gas purification process of acid engineering. It belongs to the field of electric demister and consists of cathode load beam, cathode wire, weight and lower cathode frame. , the upper end of the cathode line is hung on the cathode load beam, which is characterized in that the weight vertically connected to the lower end of the cathode line is composed of a closed plastic outer cylinder and a plumb weight inside it, and the lower cathode frame is a main beam made of plastic or glass steel It is composed of a support beam, and the support beam is correspondingly provided with an opening adjustment plate, and the outer cylinder of the weight passes through the hole of the adjustment plate. In this system, the plumb weight in the weight is isolated from the cathode line without direct contact, which effectively prevents the cathode line The electrochemical corrosion between the lead bob and the cathode wire prolongs the service life of the cathode wire. The lower cathode frame has a simple structure and high strength. The opening adjustment plate on it makes it easy to adjust the position and distance of the cathode wire. The shape of the anode tube is adjusted separately, the size accuracy is easy to control, the stability is good, the weight is light, and the installation is convenient. The electric field in the conductive FRP electric demister is stable, the operation is safe, the service life is long, the demisting efficiency is high, and the acid mist outlet is ≤3mg / NM3.

The invention discloses a stress-controlled 3D printing remanufacturing method of a metal part. Firstly, a metal part body sample and a cladding sample are prepared, and laser parameters required for the same residual compressive stress are obtained by laser shock; processing, and use the image recognition method to determine the repair area and repair margin of the part; then use the laser 3D printer to repair the metal parts layer by layer, so that the size of the repair part reaches the original design size of the part; finally use laser shock to eliminate the residual tensile stress, and then use The laser shock strengthening method forms a residual compressive stress layer on the working surface of metal parts. The invention uses laser 3D printing to repair the parts, the overall deformation of the parts is not large, and the dimensional accuracy of the repair is easy to control, and no subsequent processing is required; the overall strength of the repaired parts is the same, and the residual compressive stress of the strengthening layer on the surface of the parts after using laser shock strengthening Values ​​are balanced to extend the service life of parts after remanufacturing.