15results about How to "Reduce flutter" patented technology

This invention discloses a cutting device and process for crankshaft machining, relating to the technical field of crankshaft machining equipment. It includes a support frame, a feeding trough, a guiding mechanism, a feeding mechanism, a tilting mechanism, a lifting mechanism, a CNC machining mechanism, a top-pressure rotation mechanism, a vibration stabilization mechanism, and a control system. The feeding trough, guiding mechanism, and feeding mechanism achieve automatic workpiece sorting and conveying; the tilting mechanism rotates the workpiece to a horizontal machining position; the lifting mechanism precisely lifts the workpiece to the machining position; the top-pressure rotation mechanism provides rotational power and works with the vibration stabilization mechanism to achieve automatic centering; the vibration stabilization mechanism detects vibration in real time through an accelerometer, and when vibration exceeds limits, drives an auxiliary pin assembly to press the crankshaft balance block, dynamically applying a damping force to counteract chatter. This invention solves the problems of large vibration, low centering accuracy, and insufficient automation in existing devices, significantly improving crankshaft machining accuracy and extending tool life, and is suitable for mass production of high-precision crankshafts.

This utility model relates to the field of drying equipment technology, and in particular to a drying device, comprising a vertical drying area surrounded by drying components. The drying area can simultaneously dry at least one pair of sides of the components to be dried. The drying area has at least one inlet and one outlet for the components to be dried. It also includes a traction mechanism that pulls the components to be dried vertically through the drying area from the inlet and out from the outlet. The drying channel is arranged vertically, with guide rollers and traction rollers positioned at the uppermost and lowermost ends, respectively. The components to be dried pass vertically through the drying area. The drying area dries the components from both sides, completely avoiding physical contact with the guide rollers and traction rollers during the drying process to prevent process defects such as printing transfer, blurring, misalignment, and deformation. This reduces the drift amplitude of the components to be dried, achieving uniform drying on both sides and controlling the migration of the components to be dried.

This utility model discloses a raft-type liftable aerator, relating to the field of aerator technology. The utility model includes plastic floats, elbows, tees, connectors, aeration risers, an aerator body, and steel wire ropes. Two floats are provided, and several elbows are provided, with the two floats connected by the elbows. By using two floats connected by several elbows and then joined by the connector to form a raft, the stability of the aerator body is increased. Four steel wire ropes are used to fix the entire raft, adding two more steel wire ropes than the single float of the original suspended chain aeration system, further reducing the swaying amplitude of the floats on the water surface. By replacing the hose (snake-skin hose) connection between the floats and the aerator body with a connector that connects to the aerator body via the aeration riser (which is a rigid pipe), tangling of the hose (snake-skin hose) is avoided, preventing tangling from affecting the equipment's performance and maintenance.

This invention relates to the field of blade processing equipment technology, and more particularly to a multi-axis rotary polishing machine tool for processing steam turbine blades, comprising: a frame, a grinding wheel base, a mounting shaft, and a clamping seat; the mounting shaft is rotatably connected to the frame; the clamping seat is rotatably connected to the mounting shaft; the grinding wheel base is connected to the frame; the support mechanism can clamp the blade and perform polishing on the blade's fluttering parts, thereby increasing the stiffness of the blade at the clamped part, and thus increasing the blade's natural frequency and eliminating flutter; this invention improves the stiffness of the polished part of the blade edge by clamping the clamping shaft on both sides of the thinner part of the blade edge during polishing, thereby increasing the natural frequency of that part of the blade, so that the natural frequency of the blade at the polished part is offset from the high-frequency vibration frequency generated by the rapid rotation of the grinding wheel base during polishing, thereby reducing the occurrence of flutter during polishing.

The utility model relates to the technical field of grinding wheels, and discloses a superhard grinding wheel structure based on a composite structure, which solves the problems that an existing grinding wheel is large in dust during grinding, seriously affects the operation sight and the body health of workers and is poor in using effect, and comprises a fixed sleeve, a threaded groove is formed in the inner wall of the fixed sleeve, and the threaded groove is in threaded connection with the fixed sleeve. A grinding wheel body is fixedly installed on the surface of the fixing sleeve, a superhard grinding layer is fixedly installed on the surface of the grinding wheel body, a dust collecting groove is formed in the middle of the front side of the grinding wheel body, a first annular groove is formed in the front side of the grinding wheel body, and a second annular groove is formed in the front side of the grinding wheel body and located on the outer side of the first annular groove. A plurality of first ash inlet holes are annularly formed in the bottom of the interior of the first annular groove at equal intervals, and a plurality of second ash inlet holes are annularly formed in the bottom of the interior of the second annular groove at equal intervals; according to the grinding wheel, dust generated during grinding is small, the operation sight and body health of workers are guaranteed, and the use effect is very good.

The utility model belongs to the technical field of unmanned aerial vehicles, and particularly relates to an electric power inspection unmanned aerial vehicle-mounted laser obstacle removing device which comprises a machine body, a connecting box is fixedly installed at the bottom of the machine body, a supporting frame is fixedly installed at the bottom of the connecting box, and a supporting plate is integrally and fixedly installed at the bottom of the supporting frame. An air cylinder is fixedly installed at the rear end of the top of the supporting plate, a top plate is fixedly installed on the front face of the output end of the air cylinder, a second clamping plate and a first clamping plate are slidably arranged on the two sides of the front end of the top plate correspondingly, and inclined grooves are formed in the rear ends of the first clamping plate and the second clamping plate in a penetrating mode correspondingly; a stop lever is slidably arranged at the center of the bottom of the connecting plate, and the bottom end of the stop lever is slidably arranged in the inclined groove. By fixing one end of the foreign matter, shaking of the foreign matter during obstacle clearing is reduced, obstacle clearing difficulty is lowered, and obstacle clearing efficiency is improved.

This invention belongs to the field of robot control technology and discloses a robot control method and system considering mismatched disturbances and actuator faults, including the following steps: (1) constructing a robot kinematic error model considering mismatched disturbances and actuator faults; (2) designing a fractional-order decoupled sliding surface related to the error; (3) designing a chatter-free superspiral sliding surface reaching law and constructing a gain adaptive barrier function; (4) designing an actuator fault estimator; (5) designing a controller based on the chatter-free superspiral sliding surface reaching law and the actuator fault estimator, and using the controller to perform trajectory tracking control on the robot. This invention enables fast, jitter-free adaptive tracking control of a mobile robot when boundary information of the disturbance derivative is lacking.

The invention discloses an automatic dry material feeding method and an automatic feeding device for a tundish, the automatic feeding device is used for feeding a dry material into a tundish body, and the method comprises the steps of supplementing the dry material, screening the dry material, conveying the dry material, applying the dry material and cleaning impurities and packaging bag scraps. Bagged dry materials are directly placed in the stock bin, wall breaking is conducted on the bagged dry materials through the cutter assembly, the materials are scattered, through the screening and conveying effects of the screening mechanism and the discharging mechanism, the homogenized pure materials are conveyed into the discharging channel, the downward sliding speed and flow of powder are controlled through the material guiding thin pipe and the spiral auger, and the powder can be conveyed into the discharging channel through the material guiding thin pipe and the spiral auger. And the motor car is controlled to move along the surrounding track, so that the output end of the conveying hose moves along the application area of the tundish body to uniformly apply the materials, accurate operation control is realized, the uniformity of the materials applied in the tundish is improved, meanwhile, dust generated in the application process is collected, the material supplementing process is relatively efficient, time and labor are saved, and the material supplementing efficiency is improved. And the safety is obviously improved.

The invention relates to a suspension bridge gravity cable-adding windproof system which comprises a bridge floor (1) and main bridge columns (2) arranged on the two sides of the bridge floor (1), an upper main arch (4) is connected between the tops of the main bridge columns (2), a lower main arch (5) is connected between the lower portions of the main bridge columns (2), a plurality of upper slings (6) connected with the bridge floor (1) are arranged on the upper main arch (4) in parallel, and the upper slings (6) are connected with the bridge floor (1). And a plurality of lower slings (7) connected with the bridge floor (1) are arranged on the lower main arch (5) in parallel. Compared with the prior art that only an upper suspension cable system is arranged, the lower suspension cable system is additionally arranged, the bridge floor can be fixed more stably, resonance caused by the fact that crosswind acts on the bridge can be effectively prevented, the suspension cable system is additionally arranged on the lower portion of the bridge, and only one set of lower suspension cable needs to be additionally arranged on the lower portion of the bridge; and the stability is realized by utilizing the gravity and tension of the lower sling.

The invention discloses a flutter suppression milling cutter design method and a cutter, and relates to the technical field of cutting design, and the flutter suppression milling cutter design method comprises the following steps: constructing a cylindrical cutter model based on the diameter of a milling cutter and the length of a cutter handle, including a cutter handle and a cutting edge part, and scanning and cutting off the cutting edge part to obtain a peripheral cutting edge parallel to a generatrix; drawing a chip groove structure to form a cutter bottom edge, connecting the peripheral edge and the bottom edge by using a cutter point hyperbolic arc section, converting the arc section into a hyperbolic standard equation through coordinate transformation, analyzing radial and axial distances of tangency points, constraining shape parameters of a cutter point hyperbolic, carrying out passivating treatment, and determining a second shape parameter of a cutting edge hyperbolic; the peripheral edge is twisted to form a spiral structure, so that cutting chatter is reduced in two aspects of reducing airflow influence generated during cutting of the cutter and dispersing cutting force, and the cutting stability of the cutter is improved.

The utility model relates to the technical field of quartz sand screening, in particular to a dust falling device for quartz sand screening, which comprises a dust collecting component mounted at the upper end of a vibrating screen, the dust collecting component comprises a dust collecting cover fixedly covering the upper end of the vibrating screen, and a dust collecting pipe is fixedly mounted at the upper end of a discharge port of the vibrating screen. An annular pipe is fixedly installed on the outer side surface of the dust collecting cover, a plurality of dust collecting openings fixedly communicate with the outer side surface of the annular pipe at equal intervals, the filtering assembly is arranged on one side of the vibrating screen, and the discharging assembly is fixedly installed on the lower end surface of the filtering bin. The dust collecting pipes are arranged above the vibrating screen and above the discharging port of the vibrating screen, dust flying at the two positions is collected, dust flying caused by vibration during discharging of the discharging port is reduced, the dust is collected through the filter cartridge, the spiral blades rotate, the dust on the inner wall of the filter cartridge is scraped off, and then the dust is discharged through the discharging assembly. The permeability of the filter cartridge is kept, and the suction force at the dust collecting pipe is prevented from descending.

The utility model discloses a thin-wall cylinder barrel inner hole rough and fine integrated boring head which comprises a cutter handle and an installation seat, the cutter handle is detachably connected with the installation seat, two sliding rods are installed on the installation seat in a sliding and penetrating mode, and the two sliding rods are located on the same straight line. The ends, located outside the installation base, of the two sliding rods are fixedly connected with a rough boring tool apron and a fine boring tool apron correspondingly, and blades are installed on the rough boring tool apron and the fine boring tool apron correspondingly. According to the utility model, the rough boring tool apron and the fine boring tool apron are almost symmetrically distributed on the two sides of the mounting seat, so that the mass distribution of the tool is more uniform, the dynamic balance performance of the tool during high-speed rotation is improved, the flutter in the cutting process is reduced, and the processing progress and the surface quality are guaranteed; and the two sliding rods can be driven to move at the same time through cooperation of the two-way screw and the half nuts, so that the distance between the blade and the mounting base is adjusted, thin-wall cylinder barrels with different hole diameters can be conveniently machined, and the using effect is good.

The present invention provides a machine tool spindle structure with damping, including a spindle, a front taper hole is provided at the front end of the spindle; a spindle taper sleeve and a damper; the spindle taper sleeve is a hollow conical structure, which is adaptively installed in the front taper hole of the spindle, and a spindle taper hole is also provided in the spindle taper sleeve for installing a machining tool, and the damper is arranged between the front taper hole and the spindle taper sleeve, and contacts the spindle taper sleeve. The present invention enhances the contact performance between the tool shank and the spindle taper hole by providing a damper and cooperating with a rigid contact structure of a conical surface contact, actively controls and reduces the vibration generated during the cutting process, solves the problem of excessive cutting vibration during the cutting process of the machine tool and rapid repair and replacement after the spindle taper hole surface is damaged, and effectively improves the machining accuracy and use efficiency of the machine tool.

The superfinishing machine comprises a lathe bed, a first pedestal is arranged in the center of the top end of the lathe bed, a feeding system is arranged in the first pedestal, a lifting seat is arranged in the feeding system, a grinding driving system is arranged on one side of the lifting seat, and a grinding motor is arranged on the other side of the lifting seat. A superfinishing grinding head is arranged on the other side of the lifting base, a main shaft is arranged in one side of the lathe bed, a magnetic disc is arranged at the top end of the main shaft, and a plurality of supporting blocks are arranged at the top end of the magnetic disc. A main shaft system adopts an N bearing with higher precision and a high-speed two-angular-contact thrust ball bearing with higher radial bearing capacity, so that radial run-out and axial play of a main shaft in the rotating process are effectively reduced, the stability of the bearing to be ground in the high-speed rotating process is ensured, the size precision of the machined bearing is higher, and the service life of the bearing to be ground is prolonged. And the form and location tolerances such as roundness and cylindricity are smaller, and the machining requirement for the precision requirement of the bearing can be met.