371results about How to "Reduce rework rate" patented technology

The invention relates to the technical field of building information management, in particular to a BIM (Building Information Modeling)-based prefabricated part design quality management method, which comprises the following steps of S1, establishing a prefabricated part three-dimensional information model with multi-dimensional parameters by using BIM software; S2, collecting real-time production data by using a sensor in a prefabricated part production process; s3, comparing the production data with initial design parameters in the BIM model to identify deviations exceeding a set tolerance range; s4, feeding back the identified deviation information to a production link, and adjusting operation parameters of production equipment according to the deviation condition; s5, after production is completed, whether the indexes meet the requirements or not is determined; and S6, adjusting the design and process standard of subsequent production. According to the invention, through real-time data acquisition, deviation analysis and feedback, optimization suggestion generation and closed-loop management, continuous improvement of precision and quality of a prefabricated part production process is ensured, and effective combination of design and production is realized.

The invention relates to the technical field of automobile metal part drilling machining, in particular to an automobile steering knuckle drilling pre-machining machine tool. The automobile steering knuckle machining equipment comprises an installation machine base, a drilling device, a tool clamp and a control system, the drilling device and the tool clamp are installed on the installation machine base and are important components of the equipment, and preprocessing of an automobile steering knuckle is achieved; the control system comprises a hydraulic system, a pneumatic control system, a cutting fluid circulating system, a lubricating system, a chip removal system and an electric control system. The drilling device, the tool clamp, the material pressing device, the control device and other functional components are efficiently matched, the efficiency of automobile steering knuckle drilling pre-machining is remarkably improved, through precise movement of the drilling device, stable fixation of the tool clamp and the material pressing device and continuous lubrication of the lubricating device, high precision of the machining process is guaranteed, and the machining efficiency is improved. The problems of workpiece machining defects, equipment overheating and the like are reduced, and potential safety hazards are reduced.

The invention discloses a fabricated curtain wall construction method, system and equipment based on a BIM technology and a storage medium. The method comprises the following steps: performing virtual paying-off on a building main body structure to obtain paying-off data; acquiring curtain wall information of the fabricated curtain wall; performing hoisting path simulation on the fabricated curtain wall according to the curtain wall information and the pay-off data, and adjusting the simulated hoisting path in a BIM model including the building main body structure to obtain an adjusted BIM model; the assembled curtain wall is temporarily fixed through the adjusted BIM model; performing error detection on the temporarily fixed fabricated curtain wall to obtain an error report, performing position adjustment on the temporarily fixed fabricated curtain wall according to the error report, and stopping adjustment when an error value is within a preset range to complete installation. By implementing the technical scheme provided by the invention, the construction precision of the fabricated curtain wall is improved.

The invention relates to the field of laser welding, and discloses a straight seam automatic butt welding laser device which comprises a machine box, a supporting table and an observation window used for observing the welding operation process are arranged in the machine box, and a supporting frame used for fixing and supporting is arranged at the bottom of the machine box; the multi-axis moving mechanism is used for guiding the laser welding head to accurately move in the X direction, the Y direction and the Z direction; the laser welding head is fixedly installed on a moving seat of the multi-axis moving mechanism, can move in the multi-axis direction and is used for achieving straight seam butt welding of the workpiece to be welded; and the moving table is connected into the case in a sliding manner. Through the first clamping plate and the second clamping plate which are symmetrically arranged, the elastic adjusting device and the hydraulic push rod are combined, the clamping force can be automatically adjusted according to the shape and the size of a workpiece, and it is ensured that the workpiece is stable and does not move in the welding process. The adaptability of the clamping plate is improved through stretching of the soft sliding plate, and the integrity and attractiveness of the workpiece are further guaranteed.

The invention belongs to the technical field of three-dimensional measurement and weld joint processing, and discloses a weld joint feature recognition and path extraction method based on line laser measurement. According to the full-automatic welding seam shape extraction method, an automatic measurement part before welding seam polishing and other machining steps can be achieved, after a robot measures the position of a welding seam, welding seam shape extraction can be achieved, the position of the center line of the welding seam can be calculated, and therefore a machining path is obtained; and the robot can be directly guided to process the welding seam through the hand-eye matrix. In addition, the welding width and surplus height characteristics before and after welding seam machining can also be calculated and compared. After the welding width and the excess weld metal are calculated, the machining parameters can be further calculated, and the whole method provides technical support for automatic welding seam machining.

The invention discloses a high-precision part machining path planning method based on artificial intelligence optimization, and the method comprises the following steps: generating a first three-dimensional geometric model of a to-be-machined part, carrying out the curved surface division, and obtaining a manufacturing feature point according to a division result; determining a processing placement surface for the first three-dimensional geometric model according to the manufacturing feature points, and performing processing element positioning and shaping to obtain a second three-dimensional geometric model; processing path preliminary planning is carried out, optimization is carried out based on mixed # imgabs0 # equilibrium by using a neural network, and a second planning processing path is output; performing path optimization based on a Gaussian distribution function and a cubic # imgabs1 # spline curve to obtain a third planning processing path; and simulation verification is carried out, path adjustment and optimization are carried out by adopting a hierarchical optimization ant colony algorithm according to a verification result, and a final planning processing path is output. The precision, the efficiency, the flexibility and the adaptability in the high-precision part machining process are improved.

The invention relates to the technical field of glass core substrate production, in particular to a glass core substrate FOUP carrying box. The device comprises a box body, a cover plate and a base plate supporting mechanism, the base plate supporting mechanism is arranged in the box body, the cover plate is detachably connected to an opening in the front end of the box body, the base plate supporting mechanism comprises side edge supporting assemblies and a middle supporting assembly, and the two sides in the box body are each provided with a set of side edge supporting assemblies; a group of middle supporting assemblies are arranged in the middle in the box body, the side supporting assemblies and the middle supporting assemblies are of a multi-layer structure, and each layer of area for placing a glass core substrate is correspondingly formed by each layer of the side supporting assemblies and each layer of the middle supporting assemblies. According to the carrying box, the middle supporting set is additionally arranged, the situation that the middle of a large-size substrate collapses due to the fact that the large-size substrate is too long can be effectively prevented, and the stability of the substrate in the box body and the product quality are improved; a three-point contact mode is adopted among the middle support group, the lateral support group and the substrate, so that the contact area is reduced.

The invention relates to the technical field of three-dimensional scanning, in particular to a 3D printing product personalized design method based on a three-dimensional scanning human body model. The method comprises the following steps: acquiring human body three-dimensional scanning data and human body composition data; performing movable joint analysis on the human body three-dimensional scanning data to generate human body movable joint data; performing distributed three-dimensional model modeling on the human body three-dimensional scanning data based on the human body movable joint data to generate a human body three-dimensional model; initial human body fitting product design is conducted on the human body three-dimensional model based on the 3D printing technology, and initial 3D printing product parameter data are obtained; according to the method, by combining the human joints, the body composition data and the user feedback, the fitness and the personalized design precision of the 3D printing product are optimized, and the precision and the flexibility of the personalized design of the 3D printing product are improved.

The invention discloses a camera module image calibration method, relates to the technical field of electronic data processing, and aims to solve the problems that the calibration of a camera module cannot adapt to a changeable illumination environment and the consistency of the camera module is difficult to guarantee, and the method comprises the following steps: S1, obtaining a color temperature graph from the first color temperature to the Nth color temperature of a current module, each color temperature image is divided into a * b areas in a gridding mode; s2, calculating an R / G mean value and a B / G mean value of each region according to the image data of each region of each color temperature image of the current module; s3, screening out bad modules according to R / G and B / G ratios of the current module and the corresponding area of the typical module; s4, calculating AWB data and LSC data of the camera module from the first color temperature to the Nth color temperature according to the image data of the N color temperature graphs, and storing the AWB data and the LSC data in a memory; and S5, according to the actual environment illumination condition, automatically calling the AWB data and the LSC data, calculating a correction coefficient, and using the correction coefficient to calibrate the image, the camera module image calibration method not only can calibrate the color balance under different color temperatures, but also can significantly improve the consistency between modules, especially in large-scale production, the production efficiency is greatly improved, and the production cost is reduced. And the method is particularly effective for controlling bad modules.

The invention relates to a fixing device for bridge group anchors and a construction method, the fixing device for bridge group anchors comprises a plurality of steel strands and anchor bearing plates, and further comprises a mounting frame, the mounting frame comprises a back plate and a plurality of partition plates, the partition plates are fixedly mounted on the back face of the back plate, the partition plates divide the back plate into a plurality of compartments, and round holes are formed in the portions, in the middles of the compartments, of the back plate; and the anchor boxes are fixedly installed in the compartments, and installation parts of the anchor boxes penetrate through the round holes, are located on the front face of the back plate and are suitable for steel strands to penetrate through. According to the fixing device, an installation pipe is fixedly installed on a fixing plate, a steel strand penetrates through the installation pipe, and a pipeline installation hole is formed in an installation part of an anchor box and used for installing the installation pipe in a penetrating mode; the angle of the anchor box is adjusted and fixed when the anchor box is mounted, then the mounting pipe and the steel strand are positioned and fixed, the influence on the mounting angle of the steel strand in the subsequent construction process is avoided, the incident angle of the steel strand can be accurately controlled, and firmness and reliability are achieved.

The invention relates to the technical field of laser welding, and discloses a solid-state laser radar module packaging method and system.The method comprises the steps that a front shell and a rear shell of a solid-state laser module are subjected to laser welding packaging through historical output parameters, and parameters of a welding seam between the front shell and the rear shell after packaging is completed are collected; the flatness is compared with the preset standard flatness, whether the historical output parameters need to be adjusted or not is judged, the welding speed is adjusted according to the difference value of the flatness and the standard flatness, and the final value of the welding speed is obtained; comprehensively judging whether to adjust the laser power or not according to the depth comparison result and the width comparison result; and obtaining an adjustment coefficient of the laser power according to the fusion depth standard deviation, the fusion width standard deviation and the number of the unqualified collection points, and adjusting the laser power according to the adjustment coefficient to obtain a final value of the laser power. By dynamically adjusting the laser power and the welding speed, the stability and the welding seam quality in the welding process can be remarkably improved.

The invention discloses a full-automatic shaver welding method which comprises the following steps: workpiece positioning: adopting a high-precision visual positioning system and combining with a multi-axis mechanical arm to carry out precise positioning and welding parameter intelligent setting on each part of a shaver; laser welding is executed, specifically, a laser beam with high energy density is used for welding a shaver part under set welding parameters, and welding quality is monitored in real time, specifically, a multi-sensor fusion technology is adopted and comprises an infrared thermal imaging sensor and an ultrasonic flaw detection sensor, and temperature distribution and weld defect parameters in the welding process are monitored in real time; self-adaptive adjustment: monitoring data in real time according to the welding quality, and if the welding quality does not reach a preset standard; high-precision positioning and intelligent parameter setting are achieved, the advanced technology is adopted for real-time monitoring and adjustment, the welding quality and efficiency are improved, the cost is reduced, and automatic and intelligent development of shaver welding is promoted.

The invention discloses a vehicle-mounted charger shell friction welding device and a welding method thereof, and relates to the technical field of resistance substrate detection.The vehicle-mounted charger shell friction welding device comprises a base, Y-axis displacement mechanisms are fixedly installed on the two sides of the upper end face of the base, and an X-axis displacement mechanism is installed between the two Y-axis displacement mechanisms; an X-axis displacement mechanism is installed on the upper portion of the base, a vertical displacement mechanism is installed below the X-axis displacement mechanism, a friction welding mechanism is arranged at the bottom of the vertical displacement mechanism, a shell clamping mechanism is arranged in the middle of the upper end of the base and comprises guide grooves, clamping plates are installed above the guide grooves correspondingly, and the clamping plates are arranged on the upper portions of the guide grooves correspondingly. And a transmission rod is installed in the guide groove, a threaded transmission pipe is installed outside the transmission rod, a sliding block is installed outside the threaded transmission pipe, and the problems that in a traditional welding mode, the welding speed cannot be increased on the premise that the flatness of the welding position is ensured, and the flexibility of a positioning mechanism is poor are solved.

The invention discloses an intelligent control method and system for waterproof material production and processing, relates to the technical field of automatic control, and realizes comprehensive monitoring and regulation of a waterproof material production process, firstly, through real-time data acquisition of an industrial camera and a sensor group, construction of a high-dimensional feature vector Vfeed (t) and application of a classification model, a high-dimensional feature vector Vfeed (t) is obtained; and the defects on the surface of the material can be accurately identified and classified. And then, by generating a feedback control signal Cctrl (Vfeed, S, P), the system can adjust the production speed S and the pressure P in time, and dynamically regulate and control the detected defective material. Moreover, the system ensures the adjustment effectiveness in the production process through an iterative verification mechanism, and avoids the limitations, including low efficiency, misjudgment and missing detection, of the traditional manual inspection and optical detection methods. The production efficiency and the material quality are improved, and the defect rate and the rework rate are effectively reduced.

The invention belongs to the technical field of process control, and discloses a ceramic package substrate surface roughness control system and method. The method comprises the following steps: carrying out regional division on a substrate according to a preset roughness standard; measuring the surface of the substrate to obtain elevation data of the substrate; analyzing the elevation data of the substrate to obtain the area surface roughness of each area; according to the roughness standard and the area surface roughness of each area, a natural heuristic optimization algorithm is adopted to optimize polishing parameters of each area, and the polishing parameters are marked as optimization parameters; according to the optimization parameter of each region, sorting each region; the polishing equipment is controlled to be sequentially adjusted to run according to the corresponding optimization parameters according to the area sequence; the polishing efficiency can be effectively improved, and resource waste is reduced; the requirements of different areas and different substrates are effectively met, and the surface quality and consistency of the substrate are improved, so that the reliability and performance of an electronic device are enhanced.

The invention discloses a wear-resistant cable processing method, and belongs to the field of cable processing, the processing method comprises the following specific steps: S1, wear-resistant cable material selection and pretreatment; s2, balancing and optimizing each performance index of the cable; s3, performing simulation testing on different knitting schemes; s4, selecting and using a wear-resistant coating material; the wear resistance of the cable can be remarkably improved, the replacement frequency and the maintenance cost are reduced, the diversity and comprehensiveness of weaving process optimization are guaranteed, the number of tests and material waste in actual production are reduced, the research and development cost and time are reduced, the research and development efficiency is improved, resource waste can be reduced, and the overall production efficiency is improved. And efficient operation of the production process is guaranteed, the defective rate and the rework rate are reduced, and the quality and consistency of products are improved.

The invention relates to the technical field of thermoplastic material foaming, in particular to a preparation method of an ultralight foaming material with micropore channels. The invention relates to an ultralight foaming material with micropore channels. The ultralight foaming material comprises the following substances in parts by weight: 80-90 parts of thermoplastic matrix resin; 0.1 to 2 parts of a pore-foaming agent; 0.1 to 0.8 part of a functional auxiliary agent; 10 to 20 parts of auxiliary materials; the pore-foaming agent comprises one or a mixture of more of activated carbon, zeolite, porous ceramic and hollow glass microspheres. According to the technical scheme, the thermoplastic matrix resin is selected to be combined with the pore-forming agent, the composite material formed after foaming treatment has a good vacuum channel structure, the density of the material is effectively reduced, the porosity of the material is improved, on the basis, selection of the pore-forming agent is optimized, and the porosity of the material is improved. The prepared ultralight foaming material has different pore structures and adsorption performance, and more excellent material performance can be obtained through mixed use.

The invention discloses a laser marking quality automatic evaluation method based on machine vision. The method comprises the following steps of S1, collecting a laser marking image and performing preprocessing; s2, inputting the preprocessed image into an image segmentation network constructed based on FastSAM to generate a segmentation mask image; s3, extracting a marking area communication block according to the segmented mask image, and constructing an image sub-area set; s4, normalizing the sizes of the image sub-regions, constructing three-channel enhanced input, inputting the three-channel enhanced input into an image coding network constructed based on the OfficientViT, and extracting an image-level feature vector; s5, inputting the image-level feature vector into an ArcFace angle interval classification module, and outputting a defect type classification result; s6, calculating a multi-dimensional quality scoring index; and S7, inputting the multi-dimensional quality scoring indexes into a weighting function to generate a comprehensive scoring result, comparing the comprehensive scoring result with a qualified threshold, and outputting an evaluation result. According to the method, a region perception image segmentation strategy and a lightweight feature coding mechanism are combined, and automatic identification and quality evaluation of character defects in the laser marking image are realized.

The invention relates to a drawing and flanging die and a method for controlling flanging springback of a sheet metal part, the drawing and flanging die comprises a drawing male die and a drawing female die, a blanking gap is arranged between the drawing male die and the drawing female die, and the blanking gap comprises a plane gap section, a flanging fillet gap section and a flanging section gap section which are communicated in sequence; the flanging section gap section comprises a flanging springback value small linear gap section, one end of the flanging springback value small linear gap section is communicated with the flanging rounded corner gap section, and the flanging springback value small linear gap section obliquely extends in the direction close to the drawing male die from the connecting position of the flanging springback value small linear gap section and the flanging rounded corner gap section. And the flanging springback value small linear gap section is used for pre-shaping the flanging section section C part of the sheet metal part to form a pre-shaped flanging springback value small linear section D1. And the straight line section D1 with the small pre-shaping flanging springback amount has the smaller springback tendency, so that the sheet metal part can keep the shape and the size meeting the design requirement after being unloaded.

The invention provides a shrinkage fit tool, and relates to the technical field of stirring equipment. The shrinkage fit tool comprises a workbench, a stand column and an N-stage positioning assembly. The top of the workbench is provided with a datum plane. The bottom end of the stand column is connected with the datum plane, and the stand column is perpendicular to the datum plane. The N stages of positioning assemblies are sequentially arranged in the axial direction of the stand column. The positioning assembly comprises a mounting sleeve and at least two supporting pieces, the mounting sleeve is coaxially and rotatably arranged on the stand column, the at least two supporting pieces are evenly distributed in the circumferential direction of the mounting sleeve, the ends, close to the mounting sleeve, of the supporting pieces are hinged to the mounting sleeve and form a rotating axis, and first clamping grooves are formed in the sides, away from the axis of the mounting sleeve, of the supporting pieces; the first clamping groove is used for accommodating part of the web plate; in the axial direction of the stand column, an axial gap is formed between the web and the first clamping groove, and in the radial direction of the stand column, a radial gap is formed between the inner side of the web and the first clamping groove. The web can be effectively prevented from deviating and inclining, and the mounting precision of the web is improved.

The utility model relates to a hollow plate hot mark pressing device which is suitable for the field of hollow plate processing. The device comprises a support, two hot-pressing rollers rotating relatively are arranged on the support, a plurality of protruding annular hot-pressing teeth are evenly distributed on the hot-pressing rollers in the radial direction, a hot-pressing mark channel is formed, a motor drives a chain to conduct transmission, continuous machining of the hollow plate is achieved, and efficiency is improved. The hot-pressing roller is hollow to form a heat-conducting oil cavity, the hollow rotating shaft serves as an oil inlet and outlet channel, heat-conducting oil is circularly heated under the action of the conveying pump, the temperature is maintained at 180-220 DEG C, and it is ensured that the indentation quality is stable. A protective shell is arranged at the top of the device, and a feeding port and a discharging port are provided with height-adjustable L-shaped pressing plates, so that the device is suitable for plates with different thicknesses. According to the device, by optimizing the structural design, efficient and accurate hot-pressing mark machining is achieved, the machining quality of the hollow plate is remarkably improved, the service life of the hollow plate is remarkably prolonged, the production cost is reduced, and good market application prospects are achieved.

The utility model discloses a parallel correction device of an exposure machine. The parallel correction device comprises a mask assembly, a correction assembly arranged on the mask assembly and a moving assembly, the correction assembly comprises an air cylinder, a correction plate arranged on the air cylinder and a plurality of correction balls arranged on the correction plate; the air cylinder controls the correction plate to enter and exit between the moving assembly and the mask assembly, one end of the correction ball abuts against the side, close to the correction plate, of the mask assembly, and the moving assembly drives a film source to move in the direction close to the mask assembly through torsion control. Therefore, the film source abuts against the plurality of correction balls. According to the utility model, the moving assembly drives the film source to move towards the correction balls, and the torsion-controlled moving assembly ensures that the uniformly distributed correction balls respectively abut against the photomask and the film source, so that the photomask and the film source are arranged in parallel, the alignment time is shortened, the productivity is improved, the exposure effect of the film source is improved, and the rework rate of products is reduced.

The present application relates to the technical field of light pipe assembly, and discloses an X-ray light pipe flange packaging process, which comprises the following steps: placing a light pipe module in a vacuum environment; using an automatic grabbing mechanism to complete assembly; using an automatic screwing mechanism to tighten the flange bolts in a diagonal cross and step-by-step pre-tightening sequence, and monitoring the vacuum degree in real time; using a sensor group to collect multi-dimensional process parameters such as torque, angle, vacuum degree change rate, flange vibration and temperature in real time; a central control system judges the thread state according to the torque-angle curve, judges the sealing state according to the vacuum degree change rate, analyzes the contact uniformity according to the vibration characteristics, and corrects the target torque value according to the temperature data; when the judgment result exceeds the threshold value, an automatic alarm is given and a correction instruction is executed; through multi-parameter real-time monitoring and closed-loop control, the present application realizes instant identification of bolt tightening abnormalities, temperature compensation correction of torque, online early warning of vacuum leakage and full-process data tracing.

The utility model relates to welding equipment technical field, concretely relates to a kind of intelligent gantry submerged arc automatic welding machine, it includes: piece platform, top is equipped with multiple piece grooves along length direction, and both sides are equipped with machine tool track respectively;Welding machine tool, welding machine tool is transversely placed above piece platform, and two ends are respectively equipped with with machine tool track cooperation walking mechanism, welding machine tool top is respectively equipped with welding machine power supply corresponding each piece groove;Movable crossbeam, movable crossbeam is horizontally arranged in welding machine tool middle part, and movable crossbeam is equipped with with each piece groove corresponding cross slide;Telescopic arm, respectively with each cross slide corresponding each cross slide connection, bottom end is respectively equipped with welding torch, welding torch is connected with corresponding welding machine power supply;Controller, controller is set in one side of welding machine tool, and walking mechanism, telescopic arm, welding machine power supply and welding torch are respectively electrically connected with controller.The utility model is integrated, and automation design has significantly improved the efficiency and quality of I-shaped steel structure welding.

The present invention relates to the field of welding tooling, and specifically to an ARM displacement integral welding tooling for a power tower. It comprises a frame, an ARM fishbone welding frame is located on the frame, and a plurality of stabilizing devices for stabilizing the ARM fishbone welding frame are fixed on both sides of the frame. A fixing plate is fixed at the middle of the head end and the tail end of the frame, and a center hole is opened on the fixing plate. The center holes on the fixing plates at the head end and the tail end of the frame are concentric, and positioning supports are hinged on the fixing plates. The present invention has a simple structure and is easy to operate. The tooling can be turned over at an angle, which can reduce labor, improve welding efficiency and welding quality, and by setting a stabilizing device, the welding deformation is reduced, the rework rate is reduced, and the transportation of the ARM fishbone welding frame is convenient.

The application provides an old residential area intelligent updating method and system based on spatial anchor point crowd portrait, and relates to the field of urban planning. The method comprises the following steps: constructing an urban renewal strategy database, determining a spatial anchor point of an old residential area problem space, collecting spatial anchor point resident information, intelligently matching an updating strategy, and intelligently updating the old residential area. The method realizes the intelligent updating of the old residential area by collecting crowd portrait data of the old residential area problem space, matching urban renewal strategy items, and connecting to a concrete 3D printer and a hoisting mechanical arm. The application can cope with the updating of old residential areas in the field of urban planning, realize the matching of updating strategies based on resident crowd portraits, collect more data on the current problems of old residential areas, have higher accuracy of updating strategy matching, have a shorter cycle of "research-design-construction", and have higher qualified rates of standardized operations in updating construction.

The utility model relates to a bottle and can material channel system which comprises a material channel and a separating structure which divides the material channel into a plurality of areas, each area is provided with a temperature monitoring device used for monitoring temperature, and the areas comprise an upper flame area and a bottom material conveying area. According to the utility model, the main material channel and the branch material channels are divided into a plurality of independent areas, and the thermocouple is arranged in each area for accurate temperature measurement and independent temperature control, so that the defects of glass stripes, bubbles, knots and the like caused by abnormal temperature of the material channels can be effectively avoided; the molten glass is enabled to enter a product machine to be molded in a stable and appropriate temperature environment, so that the quality and the yield of glass bottle tank products are greatly improved, and the competitiveness of the products in the market is enhanced.

The invention provides a high-strength complex-section cavity product cutting device which comprises a height adjusting mechanism, a radian adjusting mechanism, a follow-up mechanism and a cutting unit which are sequentially arranged from bottom to top. The cutting-off unit comprises a vertical cutting-off mechanism used for cutting off material belts on the two sides of the cavity product and a horizontal cutting-off mechanism used for cutting off a reinforcing rib structure in the middle of the cavity product. The invention further provides a cutting-off method which comprises the following steps: pre-punching and cutting off a process hole in advance in a material belt before rolling forming, and integrally cutting off a cavity product by adopting a regional secondary cutting-off mode after rolling forming. Follow-up continuous cutting of high-strength complex section type cavity products can be achieved on a rolling line, the cutting efficiency is high, the quality is good, the product rework rate is greatly reduced, and the service life of a cutter is remarkably prolonged; the device is flexible to use and high in universality, and can be adapted to cold-bending profiles with various different section types through replacement of the standard cutting head.

The utility model discloses an electric tool and a motor. The electric tool includes: a functional member; the motor drives the functional part to work; the power supply device at least supplies power to the motor; the motor comprises a stator assembly, and the stator assembly comprises a stator core and a multi-phase winding. The stator iron core is provided with a plurality of teeth on which wires can be wound, each multi-phase winding comprises a plurality of coils, and each coil is composed of a plurality of wires which are wound on the same tooth in parallel; the at least two coils belonging to the in-phase winding are wound on the adjacent teeth, and the coil turns of the at least two coils belonging to the in-phase winding are different; the number of turns of the coil is the number of turns of a plurality of wires wound on the same tooth in parallel.