15 results about "Switching table" patented technology

The invention discloses an exchange table protection mechanism and a horizontal machining center, and the exchange table protection mechanism comprises a protection cover; the cylinder assembly comprises a cylinder body and a cylinder cover plate, the cylinder cover plate is fixedly connected to the upper surface of the protective cover, and the cylinder body penetrates through the upper surface of the protective cover and the cylinder cover plate; the upper surface of the exchange door is fixedly connected with the cylinder body; the upper surface of the exchange arm is fixedly connected with the lower end of the exchange door, and the exchange arm is used for jacking up the exchange door; the connecting rod assembly comprises a connecting rod body, a first connecting assembly and a second connecting assembly, the connecting rod body penetrates through the first connecting assembly and the second connecting assembly, the first connecting assembly is fixedly connected with the upper surface of the protective cover, and the second connecting assembly close to the cylinder body is fixedly connected with the cylinder body; the chip blocking plate is fixedly connected with the second connecting assembly. In this way, the sealing performance of the horizontal machining center can be enhanced, and the stability of the horizontal machining center during workpiece machining is improved.

The utility model discloses a rapid switching table and relates to the technical field of conveying equipment. The stand comprises a cuboid frame, first fixed cross rods and second fixed cross rods, a plurality of parallel first fixed cross rods are fixed at the upper end of the cuboid frame, and a plurality of parallel second fixed cross rods are fixed on one side of the cuboid frame; each bent pipe comprises a bent pipe body, a first U-shaped bolt, a second U-shaped bolt and a stock bin discharging port, a plurality of bent pipe bodies are fixed to each first fixing transverse rod through the first U-shaped bolts, and the outer wall of the other end of each bent pipe body is fixed to the corresponding second fixing transverse rod through the corresponding second U-shaped bolt. The two ends of the bent pipe body are connected with a stock bin discharging port and a quick connector respectively. According to the rapid switching table, the number of pipelines and valves in the pipelines is greatly reduced, the design of electrical programs is simplified, later maintenance is facilitated, production cost and maintenance cost are saved, and the rapid switching table is stable and reliable in structure, quite convenient to operate, economical and practical.

The invention relates to the technical field of gantry machining equipment, and particularly provides an exchange table mechanism for a gantry machining center, which comprises an exchange table, a translation device, a positioning device and a clamping device, the translation device is used for driving the exchange table to move between the working frame and the preparation frame, the translation device comprises a first driving assembly, a second driving assembly and a bottom plate, the first driving assembly is arranged on the preparation frame, and the bottom plate is arranged on the preparation frame in a sliding mode; the length direction of the bottom plate is consistent with the moving direction of the exchange table, and the first driving assembly is used for driving the bottom plate to move between the preparation frame and the working frame; according to the structure, the stroke of the exchange table is divided into two sections, different driving assemblies are used for driving the exchange table to move, the stroke driven by a single driving assembly is reduced, and the situations that due to the fact that the stroke of the single driving assembly is too large, friction loss of elements is caused, and the exchange table is not pushed in place are avoided.

The invention discloses a two-phase open-circuit fault-tolerant control strategy under a minimum copper loss constraint of a dual three-phase SynRM, and the strategy comprises the steps: respectively deducing the synthetic magnetomotive force of a residual winding, constructing a quadratic optimization model with linear constraint, and optimizing the current amplitude for the open-circuit faults of orthogonal and non-orthogonal two-phase windings, so as to enable the direction of the synthetic magnetomotive force to meet the requirements; establishing a static coordinate and a rotation transformation matrix after the fault, and performing orthogonality correction; a virtual voltage vector is synthesized based on weighted superposition of the original vectors, and a corresponding virtual voltage vector set is constructed for the two faults; and on the basis of the corrected transformation matrix and the virtual voltage vector set, constructing a voltage vector distribution diagram and a switch table in a fault state, dividing an alpha-beta subspace into 16 sectors, and selecting an optimal virtual voltage vector to realize accurate control of the flux linkage amplitude and the electromagnetic torque. Stable operation of the motor can be maintained, and the fault-tolerant capability and the operation reliability of the system are remarkably improved.

The application discloses a kind of switch protection section automatic generation method, it is related to switch generation technical field in rail transit, including the following steps: S1, the data structure of switch table is configured;S2, the fuzzy distance of secondary detection equipment characteristic table, the distance between train second axle and train front section of train characteristic table and the distance between train head and front section are configured;S3, the minimum locking distance of switch rear positioning direction distance switch tip of switch and the minimum locking distance of switch rear reverse direction distance switch tip are configured;S4, the minimum locking distance of switch front positioning direction distance switch tip of switch is configured;S5, in COE turn-back area table, the data structure of each turn-back area is configured;S6, the search distance of switch intrusion area before switch is generated;S7, the track section list of dead lock area of switch and the track section list of intrusion area are generated.The application automatically realizes the search of the protection area of each switch, including dead lock area and intrusion area.

The intelligent welding and grinding all-in-one machine for precision machining comprises a machining box body, an adjusting motor is installed in the machining box body, the top of the adjusting motor is rotationally connected with a switching table, and the top side of the switching table is provided with a third driving motor and a second driving motor. The top of the third driving motor and the top of the second driving motor are connected with a first machining table and a second machining table correspondingly, the top of the second machining table is provided with a workpiece chuck and a protective cover, and the protective cover is provided with a collecting assembly. The collecting assembly comprises a collecting pipe embedded in the protective cover, a one-way valve is arranged on one side of the collecting pipe, a plurality of air inlets are formed in the collecting pipe, multiple sets of through holes are annularly formed in the inner wall of the protective cover, the protective cover is located on the outer side of the workpiece chuck, and a welding mechanism and a grinding mechanism are arranged at the top of the first machining table and the top of the second machining table correspondingly. The device can improve the continuity of workpiece welding and grinding machining, so that the production efficiency of workpieces is improved.

The utility model provides a riveting tool for safety box processing, which comprises a track, a switching table is slidably connected to the track, an X-direction workbench is slidably connected to the switching table, the X-direction workbench is driven to move by a servo motor I, a Y-direction workbench is slidably connected to the X-direction workbench, and the Y-direction workbench is driven to move by a servo motor II. The Y-direction working table is driven by a second servo motor to move, four punching columns are arranged on the Y-direction working table, a rotary downward-pressing air cylinder is further installed on the Y-direction working table, a cross arm is installed on a piston rod of the rotary downward-pressing air cylinder, a pressing block is installed on the cross arm, an adjusting base is further connected to the track in a sliding mode, and the adjusting base is provided with a clamping groove. A first locking screw is connected to the adjusting base in a threaded mode, a cross beam is connected to the adjusting base, an electromagnet is installed on the cross beam, an iron sheet matched with the electromagnet is installed on the switching table, and a handle is further installed on the switching table.

The invention relates to the technical field of vibration tests, in particular to a magnet roller vibration test device and method, and the device comprises a supporting structure, and a through hole is formed in the upper part of the supporting structure; a servo motor is arranged at the bottom of the supporting structure, a spline is arranged at the top of the servo motor, a fixing frame is arranged on the outer side of the servo motor, a driving shaft is connected to the other end of the spline, a switching table is arranged above the driving shaft, a commutator is connected to the other end of the switching table, a cam is arranged on one side of the commutator, and a material tank is arranged on the other side of the commutator. The material tank and the cam are located on the two sides of the through hole of the supporting structure respectively. According to the magnet roller vibration test device and test method provided by the invention, the orthogonal test table completes all tests of the combined working conditions of amplitude and rotating speed in sequence, and simulation software is adopted for reproduction verification, so that the scientific and reliable test method is finally formed, the test efficiency is improved, and the test cost is reduced.

The invention provides a staggered interconnection type fault-tolerant power converter for a switched reluctance motor and a control method of the staggered interconnection type fault-tolerant power converter, and relates to the technical field of power electronics. The four-phase winding structure adopts a staggered interconnection layout, and the power switch module is composed of one-way power transistors and two-way isolation switch tubes. A redundant current path is constructed between adjacent phases, and reverse excitation, follow current and demagnetization current paths are reconstructed when an open-circuit fault occurs, so that continuous operation of the motor is maintained. And the control module predicts flux linkage and torque based on the rotor position and the phase current, selects an optimal switch combination from the fault-tolerant switch table by using an evaluation function, and realizes torque tracking and fault-tolerant control under normal and fault working conditions. According to the invention, the operation reliability and fault-tolerant performance of the system are improved.

This invention belongs to the technical field of workbench structure, specifically providing a drive structure for an exchangeable workbench. It includes a base with an internal drive cavity, a drive shaft rotatably mounted within the drive cavity, and several needle rollers arranged in a circumferential array fixedly connected to the drive shaft. A camshaft, capable of sliding up and down and rotating, is located within the drive cavity. A camshaft guide rail, cooperating with the needle rollers, is provided on the camshaft. The camshaft guide rail includes a lifting section, a rotating section, and a lowering section connected sequentially from end to end. The bottom of the drive shaft extends through the drive cavity and is fixedly connected to the output end of a drive device. The bottom of the camshaft extends through the drive cavity and into a damping buffer cavity. A buffer spring is fixedly connected to the bottom of the damping buffer cavity. A chuck at the top of the buffer spring is rotatably connected to a connecting plate at the bottom of the camshaft. A camshaft limiting assembly is also provided within the damping buffer cavity. The top of the camshaft extends through the base and is fixedly connected to the workbench. This structure is compact, reliable in operation, and has built-in buffer protection, enabling smooth movement of the workbench.

The application provides a field weakening method of a permanent magnet synchronous motor based on sector offset, and belongs to the technical field of motor control. The field weakening method is suitable for a field weakening method using a control algorithm of a switching table, and achieves the effect of field weakening by changing d-q axis voltage distribution. The field weakening method comprises the following steps: S1, observing a load via a load torque observer; S2, substituting a required maximum motor speed and the observed load into a formula to calculate a sector offset; S3, inputting the calculated sector offset into a switching table to perform sector offset; and S4, inputting an electromagnetic torque signal into the switching table, outputting a switching signal via the offset sector, and further controlling the motor. The application provides a field weakening method of a permanent magnet synchronous motor based on sector offset, the d-q axis voltage distribution is changed by rotating the sector clockwise, the offset can be calculated according to the maximum motor speed, an analytical solution is obtained, the method is suitable for algorithms such as flux linkage closed loop direct torque control, and the field weakening effect is excellent in the whole speed range.

The invention relates to the technical field of part positioning, in particular to a switching system for part positioning and a switching method thereof, and the system comprises a flexible positioning skid and a switching table device; the flexible positioning skid comprises a rolling base, the rolling base is provided with a plurality of flexible guiding and positioning devices, and the flexible positioning skid further comprises a clamping part, a positioning assembly, a pneumatic locking piece, an air receiving part and a first butt joint mechanism. The switching table device comprises a guide rail piece, the guide rail piece is provided with a plurality of displacement switching devices, and the switching table device further comprises a clamping mechanism, a ventilation mechanism and a second butt joint mechanism; the switching system further comprises an in-place detection assembly in communication connection with the control device. The method comprises the steps that the rolling base is in butt joint with the guide rail piece; the displacement switching device moves, coarse positioning and fine positioning are conducted through the in-place detection assembly, the clamping mechanism and the clamping part conduct clamping, and the pneumatic locking piece is unlocked; the clamping mechanism drives the positioning assembly to achieve position switching. The part positioning and conveying efficiency can be improved.

The invention relates to a current switching control method and system for a Z-source inverter of a photovoltaic power generation system, and the method comprises the steps: building a current switching affine model based on the Z-source inverter in the photovoltaic power generation system; establishing a current error switching affine model according to the current switching affine model; based on the current switching affine model and the current error switching affine model, establishing a plurality of subsystems of the Z-source inverter; establishing a switching table according to the plurality of subsystems of the Z-source inverter; and determining the states of an upper switching tube and a lower switching tube in the Z-source inverter in the next control period according to the switching table through a preset switching rule. The method has the advantages that the working state of the Z-source inverter in the photovoltaic power generation system can be accurately described, the switching states of the Z-source inverter in different control periods can be directly selected based on the switching rule, complex coordinate transformation and pulse width modulation processes are not needed, no control parameters exist, and high robustness is achieved under the condition that circuit parameters are uncertain.

The invention provides soil detection and collection equipment, belongs to the technical field of soil detection, and mainly aims to solve the problem that existing collection equipment is often inconvenient to collect soil in different areas, the soil detection and collection equipment comprises an equipment main body, two crawler belt driving mechanisms are arranged on the two sides of the equipment main body respectively, and a mounting table is arranged at one end of the equipment main body; a first rotating mechanism is arranged on one side of the mounting table; an acquisition connecting plate is arranged on the screw rod sliding table; a switching table is arranged at the bottom of the acquisition connecting plate; an acquisition assembly is arranged at the bottom of the switching table; a control module is arranged at the top of the equipment body, through arrangement of the collecting assembly, soil can be collected, the collected soil can be put into the collecting assembly to be collected, through cooperation of the collecting assembly and the collecting assembly, soil in different areas can be collected, and convenience is improved.

The utility model discloses an edge cutting device for metal die casting machining, which comprises an edge cutting table, a limiting track is fixedly arranged in the middle of the edge cutting table, a switching mechanism is fixedly arranged on one side of the limiting track, the surface of the switching mechanism is in threaded connection with a switching table, a supporting frame is fixedly arranged in the middle of the top surface of the edge cutting table, and a supporting rod is fixedly arranged on the supporting frame. And an edge cutting mechanism is fixedly mounted on the top surface of the supporting frame. According to the edge cutting device for metal die casting machining, through the arrangement of the switching mechanism and the edge cutting mechanism, a metal die casting is placed on a lower die, a hydraulic cylinder is started, an upper edge cutting die is driven to press downwards, edge waste of the metal die casting is cut off, and after edge cutting of one metal die casting is completed, a servo motor A drives a threaded lead screw to rotate; according to the metal die casting edge cutting device, the next metal die casting is conveyed to the position below the upper edge cutting die to be subjected to edge cutting, in the edge cutting process, personnel can place or take down the metal die casting on the lower die, the waiting time is shortened, and the working efficiency is improved.