39results about How to "Realize finishing" patented technology

The invention relates to a device and a method for magnetically grinding the inner surfaces of large-diameter long and straight pipes. The device comprises a bed, spindle motors, couplings, a magneticpole disc, a motor driving slide rail device and a hoisting device. Two ends of each pipe fitting can be sealed by pipe fitting plugs and are fixed by the aid of four-jaw chucks, the four-jaw chuck at one end of each pipe fitting is connected with the corresponding spindle motor by the corresponding coupling, the four-jaw chuck at the other end of each pipe fitting is connected with a support seat by bearings, support seat slide rails are fixed onto the bed, and the support seats are slidably connected with the support seat slide rails by support seat sliders; the motor driving slide rail device is arranged at the bottom of the bed, and the magnetic pole disc is connected with the motor driving slide rail device by the hoisting device, can be lifted under the control of the hoisting device and can axially move along the pipe fittings under the control of the motor driving slide rail device. The device and the method have the advantages that finish machining can be carried out on the inner surfaces of the pipe fittings by the aid of magnetic grinding processes, and carbon deposits, oil stain and rust stain which are accumulated at grooves inside the pipe fittings can be effectivelyremoved by the aid of the device and the method.

The invention discloses a method for improving surface performance of a single-phase high-entropy alloy, and belongs to the technical field of high-entropy alloy surface strengthening. The single-phase high-entropy alloy is an Al<x>CrCoFeMnNi alloy, wherein x represents the mole number, and is equal to 0-0.5; after the single-phase high-entropy alloy is subjected to solution treatment and surfacepretreatment, the surface of the high-entropy alloy is strengthened through ultrasonic impact equipment; and the high-entropy alloy is of a single-phase face-centered cubic structure, a certain depthof plastic deformation layer is formed on the surface of the high-entropy alloy after ultrasonic impact, grains are obviously refined, a gradient structure is formed from the surface to the core, andhardness and abrasion resistance are significantly improved. According to the method, a fine structure and a large number of microscopic defects can be obtained on the surface of the high-entropy alloy while the chemical composition of the surface of the high-entropy alloy is ensured to be unchanged and the toughness of the core is ensured, thus the hardness of the surface of the high-entropy alloy is increased by 1.8-2.5 times, the abrasion resistance is increased by 1.3-2.5 times, the method is simple, easy to operate, safe, reliable, small in energy consumption, economical and practical.

The invention discloses a fluid magnetic abrasive hole finishing processing device. The device comprises a driving cylinder and a storage cylinder which are connected into a whole through a middle connecting cover, a front end cover is arranged at the upper end of the driving cylinder, a rear end cover is arranged at the lower end of the storage cylinder, a driving cylinder piston is arranged in the driving cylinder, the lower end of the driving cylinder piston is connected with a piston rod, the other end of the piston rod penetrates the middle connecting cover to extend into the storage cylinder and is provided with a storage cylinder piston, and an oil return port communicating with the inside of the driving cylinder is arranged on a driving cylinder shell and adjacent to the middle connecting cover. After a magnetic field is applied, viscosity is increased rapidly under the action of the external magnetic field, so that grinding media with certain shear yield stress are formed along the hole wall surfaces, further processing such as finishing, grinding and deburring of inner walls of various holes is achieved, and surface adaptability and universality are high.

The invention relates to the technical field of magnetic grinding, in particular to a magnetic grinding device suitable for spherical surfaces and irregular solid surfaces and a method thereof. The magnetic grinding device comprises a driving device and a magnetic grinding roller, wherein the driving device is connected with the magnetic grinding roller; a magnetic pole is arranged in the magneticgrinding roller to form a magnetic field, and a magnetic grinding material and parts to be processed are placed in the magnetic grinding roller; and the driving device drives the magnetic grinding roller to rotate, and the magnetic grinding material moves under the action of magnetic force and centrifugal force, so that the parts to be processed are processed. The magnetic grinding device is simple and is easy to operate, a principle of simulating a roller washing machine is adopted, the magnetic grinding material is rolled in a container with high fluidity and irregularity, and the polishingeffect on the parts placed in the container is realized; and the magnetic grinding device can be widely applied to the parts with various shapes, has good adaptability and can greatly improve the processing efficiency.

A soft abrasive flow field testing method based on a level set comprises the following steps: 1) establishing an equation of motion of the level set function of the soft abrasive flow by combining a fluid Navier-Stokes equation; 2) discretizing and projecting space; 3) discretizing time; 4) iterating combination of the level set function and function of volume of fluid model; 5) reconstructing the distance function; and 6) testing the soft abrasive flow field: better analyzing the flow field characteristics to find the best machining state by adopting the principle of the level set method, namely effectively capturing topological variation of the interface. The testing method improves the computational accuracy and accurately finds the best machining state.

The invention provides an automatic feeding control method used for a numerical control lathe tailstock and capable of controlling the drilling depth. A connecting device for automatic connection and separation of a saddle and the tailstock of a numerical control lathe is adopted. The connecting device comprises a centering assembly, a rotating arm assembly, a driving assembly and a drill bit assembly. The drill bit assembly is mounted in a barrel sleeve of the numerical control lathe tailstock. The centering assembly comprises a centering shaft and a V-shaped block. The rotating arm assembly comprises a rotating arm, a rotating shaft, a shaft sleeve and two limiting press blocks. The driving assembly comprises a pair of belt drive parts, a drive motor, a reset switch and a controller, wherein the controller is mounted in a distribution box of the lathe, the reset switch is mounted in front of the saddle of the numerical control lathe, and the drive motor is fixedly connected with the numerical control lathe tailstock and electrically connected with the controller.

The invention discloses a device and method for finishing a suspended abrasive pool through triangular frustum air pressure jet holes. Thedevice and method capable of efficiently finishing complex curved surfaces, irregular holes and ultra-precision parts are researched and designed. The device comprises a frame, the abrasive pool, an air pressure power system, an air injection system and a workpiece rotating system. According to the device, a fluidized bed principle is utilized, and finishing at different degrees on different workpieces is implemented by changing air flow velocity and abrasive particles. According to the device, the triangular frustum jet holes are adopted to further gather and pressurize high-speed air flow, so that energy consumption of the air pressure power system isreduced. The device is simple to operate and low in cost, is not harmful to the environment, is not influenced by other factors, and works stably and efficiently.

The invention discloses a method for modulating high-aspect-ratio hole inner surface features by using a laser, and belongs to the technical field of laser processing. The method is characterized by comprising the following steps of (1), cleaning the inner surface of a hole; (2), clamping to enable the axis of the hole to be coincided with the normal incidence direction of the laser; (3), deflecting the incident angle of the laser and circularly scanning along the inner surface of the hole periodically; (4), adjusting the distance between the light beam relative to the surface of a workpiece;and (5), enabling the light beam to cover the whole inner surface of the hole. According to the method, based on the laser remelting technology, the high-aspect ratio hole is reprocessed by adopting the laser, local lines and local micro-cracks are efficiently eliminated by laser melting a thin layer of material, the surface roughness is greatly reduced, surface microcracks are eliminated, and themethod has the characteristics of high precision and high efficiency, and can realize assembly line production.

The invention discloses a magnetic particle grinding device and method for grinding inner and outer surfaces of different tube diameters through ultrasonic waves. The magnetic particle grinding devicecomprises a working platform, a main shaft rotating drive device, a fixed device, a reciprocating motion device and an ultrasonic vibration grinding device, wherein the main shaft rotating drive device is mounted on the working platform; a rail is arranged on the working platform in the axial direction of the main shaft; the reciprocating motion device can move along the rail; the fixed device can move on the reciprocating motion device in the radial direction of the main shaft; the ultrasonic vibration grinding device is mounted on the fixed device; a tubular workpiece is mounted on a triangular chuck of the main shaft rotating drive device; an auxiliary magnetic pole of the ultrasonic vibrating device is mounted outside the tubular workpiece; and an inner magnetic pole of the ultrasonicvibrating device is arranged in the radial direction of the tubular workpiece. The magnetic particle grinding device can realize compounding motion of magnetic poles, can perform magnetic particle grinding on inner and outer tubes of straight tubes with different tube diameters, improves grinding and polishing quality of inner and outer surfaces of the tubes, improves processing efficiency, and reduces processing cost.