150results about How to "Guaranteed running accuracy" patented technology

The invention discloses a ball screw pair pre-tightening force measurement and control system and method with a self-sensing function. The system comprises a pre-tightening device and a measurement and control device, a giant magnetostrictive material is used as the core, the functions of an actuator and a sensor are realized by using the normal inverse effect of the material, a permanent magnet provides a bias magnetic field for a giant magnetostrictive bar, one coil is used as an exciting coil for providing a driving magnetic field for the giant magnetostrictive actuator of the measurement and control device, the magnitude of pre-tightening force output by the actuator is controlled by changing the current of the exciting coil, and the other coil is used as a pick-up coil for realizing the self-sensing function of ball screw pair pre-tightening force by acquiring a magnetic field change caused by a pre-tightening force change. The system and the method can realize self-sensing of the ball screw pair pre-tightening force and automatic and accurate control of the pre-tightening force, and improve the transmission precision of the ball screw pair, so that the running precision and the machining quality of a numerically-controlled machine tool are guaranteed.

The embodiment of the invention discloses a control method for a stepping motor, and a mobile terminal. The method comprises the following steps: in a process that the stepping motor pushes a slidingblock to move to a second limitation position from a first limitation position, determining the current position of the sliding block; if a distance between the current position and the second limitation position is greater than a preset threshold value, according to a first current, driving the stepping motor; and if the distance is smaller than the preset threshold value, according to a second current, driving the stepping motor, wherein the second current is smaller than the first current. By use of the embodiment of the invention, noise generated between a lead screw and the sliding blockcan be reduced or avoided, the service life and the operation accuracy of the stepping motor are guaranteed, and meanwhile, user experience is improved.

The invention discloses a low-temperature storage transfer device and an operation method thereof. The low-temperature storage transfer device is used for conveying a transfer pot from the external environment to a refrigeration house and comprises a sealing component and a transmission component, wherein the sealing component comprises an inner door and an outer door; the inner door is provided with an inner lifting mechanism, the outer door is provided with an outer lifting mechanism, and a sealable buffer area is formed between the inner door and the outer door; the inner door is communicated with the refrigeration house, and the outer door is communicated with the external environment; the transmission component comprises an outer transmission mechanism and an inner transmission mechanism; the outer transmission mechanism is used for conveying the transfer pot from the external environment to the buffer area, and the inner transmission mechanism is used for conveying the transfer pot from buffer area to the refrigeration house. The low-temperature storage transfer device can ensure that a biological sample cannot be exposed in the normal-temperature environment after the transfer pot is uncapped, thereby reducing sample damage. The buffer area can prevent the inner part of the transfer pot from frosting, and the success rate of automatically storing and taking pipes is increased.

The invention discloses a method for controlling a rotor-side converter of a doubly fed induction generator (DFIG). A vector control system consists of a torque inner ring control module, a voltage space vector modulation module, a rotating speed measurement module, a maximum wind energy capturing module and a first-order auto disturbance rejection controller (ADRC); a given DFIG rotor rotating speed output by the maximum wind energy capturing module and an actual DFIG rotor rotating speed measured by the rotating speed measurement module are sent into the ADRC; given reactive power, given stator flux linkage and expected electromagnetic torque output by the ADRC are sent into the torque inner ring control module; the rotor-side converter is controlled through the voltage space vector modulation module according to a rotor voltage vector modulation signal output by the torque inner ring control module. According to the method, parameters of the ADRC are optimized on line, so that the problem of large difficulty in debugging of the parameters of the ADRC is solved, the control accuracy of the ADRC is improved, and the operation stability of a power generation system is further ensured.

The invention relates to an electric spindle capable of realizing automatic tool changing and provided with a build-in shank. A spindle body is provided with a cooling mechanism and comprises a spindle box, a back seat and a dust cover; spindle assemblies are press-fitted in the spindle box; the back seat and the dust cover are arranged at two ends of the spindle box; the spindle assemblies are fixedly mounted in the spindle box through cooling copper sleeves; a detection device and a control device are arranged on the back seat; one end of each spindle assembly is in transmission connection with a driving device; and the other end of each spindle assembly is detachably connected with an external device. The electric spindle has the beneficial effects as follows: a stator coil outer sleeve is changed from a steel piece into a brass casting, a circulating water-cooling channel is added in the casting outer sleeve, the temperature is prevented from increasing too fast, the operation precision of the spindle is kept, a clamping jaw and the shank are organically combined, meanwhile, a built-in encoder connected with a control center is configured, functions of automatic tool changing, instant accurate stop and the like are realized, a rotor magnetic piece is in short-circuited connection through an end copper ring, the consumption is reduced, a steel angular contact ball bearing is replaced with a ceramic ball bearing, the friction and the heat are reduced, and the life is prolonged.

The invention discloses automatic bead stringing equipment of stainless steel watchband parts. The automatic bead stringing equipment comprises a machine frame, a control cabinet and two groups of processing stations; each of the two processing stations comprises a sequencing vibration disc, a rapid positioning threading device, a placing device and a feeding and discharging device, wherein each of the sequencing vibration disc, the rapid positioning threading device, the placing device and the feeding and discharging device is provided with a detection sensor; and each rapid positioning threading device comprises a feeding mechanism, a material clamping mechanism, a silk yarn placing mechanism, a carrying mechanical arm and a fixing support, wherein the carrying mechanical arm is arrangedon the fixing support. The invention further discloses an automatic bead stringing method. According to the equipment and the method, two processing stations are arranged, the production processing efficiency is improved, full automatic processing such as automatic feeding, stringing, positioning and discharging of a processing part and a silk yarn can be realized through the sequencing vibrationdiscs, the rapid positioning threading devices, the placing devices and the feeding and discharging devices, the labor intensity and the cost are reduced, the production efficiency is improved, the stringing quality is guaranteed, and the subsequent grinding quality is improved.

The invention relates to a teaching regenerated trajectory optimizing method based on GA-PSO. The method comprises the steps that 1), when direct teaching is conducted, sampling is conducted on the trajectory of a robot according to a set sampling period, and the angular value of each joint of the robot is recorded in real time; 2), a GA-PSO algorithm is adopted as an optimization algorithm to obtain the optimal trajectory point time interval sequence; 3), spline interpolation is conducted three times according to the optimized time interval sequence and corresponding sampling trajectory pointto obtain an optimized teaching trajectory; 4), when teaching trajectory regeneration is conducted, the optimized teaching trajectory is discretized according to the controlling period to be transmitted to the robot controller, and the whole teaching trajectory is completely regenerated. Compared with the prior art, the method has the advantages of redundant trajectory information removing, stable operation, halt and abrupt acceleration nonexistence and the like.

The invention discloses a magnetic levitation bearing control method and device, a storage medium, and a magnetic levitation system. The method comprises the following steps of determining whether thestarting torque required when a compressor in the magnetic levitation system is started exceeds preset torque or not; and if the starting torque required when the compressor is started exceeds the preset torque, increasing control parameters of the magnetic levitation system to control the control parameters of a magnetic levitation bearing to be adapted to the starting torque required when the compressor is started. According to the scheme disclosed by the invention, the problem that the starting torque is variable to affect the starting reliability can be solved so as to achieve the effectof improving the starting reliability.

The invention provides a sliding block guide and precision adjustment structure applied to a hot blanking press machine. The sliding block guide and precision adjustment structure comprises a left stand column, a right stand column, a front guide plate and a rear guide plate, wherein the left stand column and the right stand column are located at the left and right ends of a sliding block correspondingly, and front guide plate and the rear guide plate are located on the front and rear sides of the sliding block correspondingly. The front guide plate and the rear guide plate are connected withthe left stand column and the right stand column through guide plate adjusting bolts, two protruding blocks are symmetrically and vertically arranged at the left ends of the inner side walls of the front guide plate and the rear guide plate, and grooves corresponding to the protruding blocks are formed in the sliding block. The sliding block is slidably connected with the left stand column and thegrooves are slidably connected with the left side surfaces and the bottom surfaces of the protruding blocks, and the sliding block and the right stand column are arranged at intervals. By adopting the sliding block guide and precision adjustment structure, the sliding block guide and precision adjustment structure applied to the hot blanking press machine is reasonable in design, the degree of freedom of the sliding block in the nonmoving direction is limited, the running accuracy of the sliding block is guaranteed; the sliding block guide and precision adjustment structure applied to the hotblanking press machine can effectively prevent the sliding block from jamming in a guide rail gap after heating expansion, prolong the service life of mould and meet the market requirements.

The invention relates to a detector array target calibration system and method. The system comprises a light spot acquisition device, a first spectroscope, a second spectroscope, a power meter, a calibration detector module, and a to-be-calibrated detector array target, wherein the calibration detector module and the to-be-calibrated detector array target are in the same distance to the first spectroscope; light spots output by the light spot acquisition device are transmitted to the calibration detector module and the detector array target respectively after passing through the first spectroscope, the second spectroscope arranged on an optical path is used for emitting a beam of light to the power meter; and a first two-dimensional scanning platform and a second two-dimensional scanning platform enable the corresponding calibration detector module and the detector array target to perform full-coverage scanning of a set path on a plane directly facing the light spots. According to thesystem in the invention, the calibration detector module is matched with the power meter so as to obtain the real power density of a calibration light source output by the light spot acquisition device, and the two-dimensional scanning platforms are arranged, so that the straightness and running precision during full-coverage scanning of the calibration detector module and the detector array target on the set path are ensured.

The invention discloses a micro-flow injection pump system for electrostatic spinning. The injection pump system comprises an injection pump, drive plates, a control panel and an upper computer, wherein the upper computer communicates with the control board mutually; the control board is separately connected to multiple micro-flow injection pumps through multiple drive plates; the core of the injection pump is a step motor which rotates to drive a slide table to move left and right; an injector is fixedly arranged on the slide table; the drive plate supports high-subdivision drive operation ofthe step motor; the control board receives the instruction of the upper computer through a 485 serial port, and controls the injection pump to act; the upper computer is a high-definition display screen which displays solution injection amount and solution injection progress in real time in addition to setting system operation parameter; and the micro-flow pump system supports one upper computerto simultaneously control multiple injection pumps. The micro-flow injection pump system is high in operation precision, is convenient in operation, and achieves injection speed range of 0.1 mL/h to 50 mL/h.

The invention discloses a logistics two-wheel automobile electric lifting and descending auxiliary support. The support comprises a mounting base, a support body and an electric telescopic driver, the two ends of the mounting base are provided with a first through hole and a second through hole respectively, the first through hole is fixed to a first hinge shaft, the second through hole is fixed to a second hinge shaft, one end of the electric telescopic driver is hinged to the first hinge shaft, one end of the support body is hinged to the second hinge shaft, the support body is fixed to a third hinge shaft, the other end of the electric telescopic driver is hinged to the third hinge shaft, the other end of the support body is further connected to a roller, and the electric telescopic driver is electrically connected to a controller, and can linearly telescope to drive the support body to rotate to thus make the roller lift and descend. The logistics two-wheel automobile electric lifting and descending auxiliary support has one-key electric lifting and descending support, after an automobile stops, the automobile can move in a short distance, and a better safe support effect is achieved.

The invention discloses a low-noise lubricating grease and a preparation method and application thereof. According to the technical scheme, the low-noise lubricating grease is characterized by being prepared from the following raw materials in parts by weight: 65-85 parts of base oil, 10-15 parts of C12-C22 hydroxy fatty acid, 3-9 parts of lithium hydroxide, 2-7 parts of boric acid and 4-8 parts of multi-effect additives. The invention also discloses the preparation method of the low-noise lubricating grease and an application of the low-noise lubricating grease in a high-accuracy micro mechanical bearing. The low-noise lubricating grease disclosed by the invention is reasonable in formula and high in production efficiency. According to the low-noise lubricating grease and the application thereof disclosed by the invention, the low-noise lubricating grease is ground by using a patent product grinding machine (a patent number: ZL201220281084.7) of the company, the particle diameters of mechanical impurities contained in the lubricating grease are controlled to be smaller than that of the prior art, the vibration decibel value of the micro mechanical bearing is less than that of the lubricating grease in the prior art, the operation accuracy of the micro mechanical bearing is ensured, the vibration and the abrasion are reduced, the vibration decibel value of the micro mechanical bearing is less than 40, and the mechanical impurities contained in the lubricating grease are smaller than 2 micrometers.

The invention relates to a double-point eccentric gear type multi-linkage mechanism for a punch press. A rotary shaft connected with a big intermediate gear is installed on one side of the big intermediate gear. A connecting pin which is perpendicular to the end face of the big intermediate gear is installed on the portion, close to an outer ring, of the interior of the big intermediate gear. The middle of the connecting pin is connected with one end of a rocker. The other end of the rocker is connected with a transmission shaft which is installed in the middle eccentric position of the interior of the big intermediate gear. One end of the transmission shaft vertically penetrates through the middle of the front end face of the big intermediate gear, and an intermediate gear is installed at the end. A left eccentric gear and a right eccentric gear which are engaged with the intermediate gear are symmetrically installed on the two sides of the intermediate gear. Connecting rods are installed on the front end face of the left eccentric gear and the front end face of the right eccentric gear. Guide columns are installed at the lower ends of the connecting rods. The double-point eccentric gear type multi-linkage mechanism for the punch press has the characteristics that the structure is simple, the production cost is low, the punching speed during punching can be effectively decreased, rapid returning is guaranteed, and the punching efficiency of the punch press is guaranteed.

The invention provides an inductance type wireless ball rod instrument. The inductance type wireless ball rod instrument is mainly composed of a ball rod instrument main machine, a center support assembly, a center cup assembly and a set ball assembly. The ball rod instrument main machine comprises an inductance measuring head assembly, a battery assembly, a circuit board assembly and a ball rod instrument main body. A wireless measuring system composed of the ball rod instrument main machine, the center support assembly and the center cup assembly is used for comprehensively detecting the precision of a CNC machine tool motion shaft. The instrument is simple to operate, high in precision, low in cost and capable of quickly detecting the precision of the CNC machine tool motion axis.

The invention discloses a hydraulic machine for fine blanking of sheet metal. The hydraulic machine comprises a machine body, a main oil cylinder, a back-pressure cylinder, a gear ring cylinder and a sliding block, wherein the gear ring cylinder is arranged in a lower workbench of the machine body; the upper end of a piston rod of the gear ring cylinder is supported in a lower guide sleeve; the lower guide sleeve is fixed in a central hole of a workbench plate; the main oil cylinder perpendicularly downward penetrates through an upper cross beam and is fixed at the center of the upper cross beam; the head part of a piston rod of the main oil cylinder is fixed on the upper side of the sliding block; the back-pressure cylinder is positioned in the sliding block; the lower side of the back-pressure cylinder is fixed inside the lower part of the sliding block; the lower end of a piston rod of the back-pressure cylinder is supported in an upper guide sleeve; and the upper guide sleeve is fixed in a central hole of the lower side of the sliding block. The hydraulic machine disclosed by the invention is simple in structure and has the advantages that the defect of desynchrony of a multi-cylinder system is overcome, the rigidity of the machine body is greatly improved, the running precision of the sliding block is guaranteed, and the requirement for utilization of a high-precision fine blanking die is met; meanwhile, the forming rate of blanked parts is improved and the material waste cost is reduced; and the flatness, the surface smoothness and the size precision of the blanked parts are improved.