271results about How to "Reduce design and manufacturing costs" patented technology

The invention discloses a method for preparing a continuous fiber multiaxial fabric reinforced thermoplastic composite material. The prepared continuous fiber multiaxial reinforced thermoplastic preconsolidating material is taken as a base material of the composite board, and combined with other functional materials for forming a novel material system which can be used for producing multiaxial fabric reinforced thermoplastic composite materials for different industries and solving the technical bottleneck that different materials have different composite bonding difficulties. According to the invention, the prepared composite material is constructed by continuous fiber multiaxial direaction; materials have the characteristics of resilience and uniform stressing on different directions. In addition, light sandwich panel formed by a honeycomb core material provides higher impact strength of materials, which is suitable for preparing structural parts and interior decorative parts in the field of railway car containers of navigation and aviation. The product of light-weight flame retardant can be recovered and used, and is more suitable for industrialization scale production of the warp knitting industry organization.

The invention relates to a intelligent method for monitoring vehicle flow, wherein the method is based on a magnetoresistive sensor and a ZigBee network. The method is used to solve some problems in urban traffic. According to the invention, vehicle flow in traffic is monitored. And then after data is processed, the data is transmitted to a traffic control department and a communication service provider; on one hand, the obtain data information is further utilized by the traffic control department to lead and control the traffic; on the other hand, the communication service provider utilizes a self-communication network to give guidance to information-demanding users including mobile communication users for their trips. Therefore, people can understand the situation of the amount of the traffic without passing a section of a road; consequently, support is provided for selection of trip routes of the people taking trips, so that it is convenient for the people to go out and an operation of a city becomes more efficient. With utilization of the mobile communication network of the communication service provider and mobile terminal equipment like a mobile phone and a PDA and the like, traffic indication and guidance are provided for people that go out and people that are on the way, so that a traffic jam degree can be reduced, traffic accidents can be avoided, and success rates of handling special events like emergency rescue and disaster rescue can be improved.

The invention discloses a method of a zero passage switch of an electromagnetic relay and a circuit, wherein an electromagnetic relay zero passage pull-in method comprises the following steps of: setting an initial value of the pull-in initial lead of the electromagnetic relay; detecting the input alternating voltage; pulling in the electromagnetic relay in advance before the input alternating zero point by the initial value of the pull-in initial lead of the electromagnetic relay according to pull-in control signals and the predicted input alternating zero point; detecting the actual pull-in time point of the electromagnetic relay and the input alternating zero point; if the actual pull-in time point of the electromagnetic relay and the input alternating zero point are identical, ending the detection; if not, modifying the pull-in initial lead of the electromagnetic according to the error between the actual pull-in time point of the electromagnetic relay and the input alternating zero point; and then repeatedly executing the steps. The invention solves the problems of striking fire of the electromagnetic relay and EMI by a circuit self-learning way, improves the service life of the relay, and reduces the manufacture cost of circuit design.

The invention discloses a milling machine clamp for shell components. A clamp body is fixed on a milling machine working table; a left pressing plate and a right pressing plate are symmetrically arranged on two sides of the clamp body; the lower end of a supporting nail is mounted on the clamp body through a locknut; the upper end of the supporting nail is supported at the outer end of the left pressing plate; the lower end of a left rotating rod passes through the middle of the left pressing plate and the clamp body and then is connected with one end of a lever; the other end of the lever passes through the middle of the right pressing plate and is connected with the lower end of a right rotating rod of the clamp body; a support is arranged on the clamp body and is supported in the middle of the lever; pressure springs are sleeved on the rotating rods and positioned between the pressing plates and the clamp body; a positioning plate is arranged on the clamp body and positioned in an area between the left pressing plate and the right pressing plate; and a cylindrical pin is arranged on the positioning plate. The invention can clamp components with similar shapes and different sizes, adopts the two-point linkage to axially clamp, has a compact structure, is simple, convenient and reliable to operate, reduces the labor intensity of workers, and improves the production efficiency.

The invention discloses a power battery composite heat management system and a method thereof. The power battery composite heat management system comprises a water tank filled with a circulating fluid, a circulating pump, a sealing cover plate of the water tank, and a battery pack array which is fixedly mounted above the sealing cover plate and is composed of a plurality of battery cells, wherein a temperature equalizing plate and a heat pipe are adhered onto the surface of each battery cell respectively, and cooing sections of the heat pipes pass through the sealing cover plate to be arranged in the circulating fluid in the water tank; a circulating fluid inlet is formed in one side end of the water tank, a circulating fluid outlet is formed in the other side end of the water tank, and a circulating fluid turbulent flow structure is arranged inside the water tank, so that the circulating fluid flows into the circulating fluid outlet from the circulating fluid inlet of the water tank in a curve flowing manner. The system and the method thereof can solve the technical problems such as heat dissipation, battery pack temperature difference reduction, battery preheating and heat cyclic utilization under different working conditions of batteries; and meanwhile, the system is compact and simple in structure and convenient in installation and maintenance, accords with the development tendency of battery heat management systems and electric automobiles, and has good application prospects.

The invention discloses a preparation method of a continuous fiber multi-axial enhanced thermoplasticity preconsolidation sheet. Warp direction and weft direction yarns are respectively led out from a creel to be expanded after being preheated by a drying oven, and then the yarns are conveyed to a weaving and overlaying net system by a traction roller. Under the control of a tension system, nets are overlaid in a cross mode to prepare multi-axial wiring harness sheets. The upper layer, the lower layer and the middle layer of the fabric sheet are respectively overlaid with the modified thermoplasticity resin film to prepare preformed thermoplasticity base material. The base material is introduced into the drying oven to be plastified at high temperature, and the sheet is subjected to cold pressing and shaping after continuous roll-in melting dipping to prepare the multi-axial enhanced preconsolidation sheet. According to the warp knitting wiring harness and the tentering dipping technology disclosed by the invention, the fabric wiring harness structure is kept, the dry fiber zone in material is eliminated, the compactness of the material is improved, and the porosity of the material is lowered; the fabric fibers of different directions construct higher specific strength of the thermoplasticity composite material; and the new technology breaks through the technical bottleneck that high-performance fiber fabric is difficult to dip.

The invention discloses a packaging structure with an antenna and a manufacturing method thereof. The method comprises the following steps of: forming a circuit diagram and an integrated circuit (IC) chip on a substrate, wherein the IC chip is electrically connected with the circuit diagram; covering a package on the substrate to wrap the circuit diagram and the IC chip; and forming an antenna diagram on the package, wherein the antenna diagram is electrically connected with the circuit diagram by using a first through hole passing through the package. Therefore, the antenna can be formed on the package of the circuit board, and the purpose of reducing the area of a circuit board is reduced.

The invention relates to a clamping tool for trimming a wing leading edge covering. The clamping tool comprises a base, two slide rail pairs, a plurality of U-shaped arms, a plurality of flexible clamping components and a plurality of covering locators, wherein the two slide rail pairs are parallel to each other and are arranged on the base; each U-shaped arm is provided with two arm parts and a connecting part connecting the two arm parts; the connecting parts of the U-shaped arms are mounted on the base by the slide rail pairs in a sliding manner; the flexible clamping components comprise vacuum chuck shape adjustment components and quick locators; the vacuum chuck shape adjustment components are arranged on the arm parts of the U-shaped arms and used for clamping the wing leading edge covering; the quick locators are arranged on the arm parts of the U-shaped arms and used for locating the vacuum chuck shape adjustment component; and the covering locators are arranged on the connecting parts of the U-shaped arms and used for locating the wing leading edge covering. The tool can clamp the wing leading edge covering flexibly, meet trimming requirements of different leading edge coverings, and greatly lower the manufacturing cost.

The invention discloses a resistance spot welding nugget nucleation dynamic quality nondestructive testing method which comprises the following steps of: acquiring the structure load acoustic emission signal in the resistance spot welding process, and drawing a dynamic curve chart; extracting the acoustic emission signals of the electrode loading stage, nugget nucleation stage and crack generation stage from the dynamic curve; counting the ringing number and total energy of the acoustic emission signals respectively; splitting the resistance spot welding sample nugget, and measuring the diameter, height and crack length of the actual nugget; establishing a sample pair to form a training set; establishing a nugget size artificial neural network and a crack length artificial neural network respectively, and training the obtained sample by use of the Back Propagation neural network algorithm; and applying the trained model to the real-time detection of the nugget size and the crack generation. According to the invention, online testing of the quality of multiple common resistance spot welding nuggets of metal structure material can be realized relatively accurately.

The invention provides a mobile terminal and a control method thereof, and the mobile terminal comprises a terminal housing, and a lifting mechanism, a vibrating mechanism and a driving mechanism which are arranged in the terminal housing; the driving mechanism can be switched between a first working state and a second working state; when the driving mechanism is in the first working state, the driving mechanism is matched with the lifting mechanism to drive the lifting mechanism to move out of or into the terminal shell; and when in the second working state, the driving mechanism is matchedwith the vibrating mechanism to drive the vibrating mechanism to vibrate. The lifting mechanism and the vibrating mechanism share one driving mechanism, so that redundant driving mechanisms can be cancelled, the internal layout space of the mobile terminal is reduced, the design and manufacturing cost is reduced, the occupation of an available area of a display screen can be reduced, and the screen-to-body ratio of the mobile terminal is improved.

The invention relates to an automatic waste PET recovery apparatus. The apparatus comprises: a shell; a display screen, an identification device and a plastic bottle recovery opening which are arranged on the shell; and a controller, a convey tube, a puncturing mechanism, a flattening mechanism, a storage bin and a liquid collection tank which are arranged in the shell; and the convey tube comprises a horizontal tube and an inclined tube, the horizontal tube is connected to the plastic bottle recovery opening, a material detection part is arranged nearby the inlet end of the horizontal tube, an automatic opening or closing movable baffle plate mechanism is arranged at the inner side of the material detection part in the horizontal tube, a material pigment detection part is arranged nearby the outlet end of the inclined tube, the baseboard of the storage bin is provided with a liquid leakage hole, and the liquid collection tank is arranged below the storage bin. The automatic waste PET recovery apparatus has the advantages of simple structure, improved functions, use convenience, low failure rate and long service life.

The invention relates to an intelligent energy-saving thermostat. The intelligent energy-saving thermostat is characterized by comprising a central processing unit (CPU) with an ARM framework chip, a touch screen display and other printed circuit motherboard and hardware which are provided with functions of a tablet personal computer as well as further comprising a sensor module, a temperature detection module and a temperature control output module which are needed by the thermostat and a storage module, a power module and an epitaxial device access module. The sensor module, the temperature detection module, the temperature control input and output module, the power module and the epitaxial device access module are all controlled by the central processing unit with the ARM framework chip as well as are communicated with other hardware such as a display module and a camera module of the tablet personal computer. The hardware of the thermostat is provided with an Android operating system and the temperature control function is achieved through the application software (APP). The intelligent energy-saving thermostat is initially designed on base of the hardware of the tablet personal computer with the ARM framework chip and operates the Android operating system, so that the intelligent energy-saving thermostat can have more powerful functions on aspects of intelligent control, air conditioning energy saving, remote control, multimedia information push, control instruction push, software and firmware update of products after sale and the like than a traditional thermostat with single chip and an intelligent home controller.

The invention discloses a system switching method, a system switching device using the same and electronic equipment. The method is applied to the electronic equipment of a first operating system and a second operating system different from the first operating system. The method includes when both the first operating system and the second operating system are in a dormant state, detecting an instruction input by a user, wherein the instruction is input by the user in a nonphysical button manner; if the instruction input by the user is a system awakening instruction, reading awakening parameters in the awakening instruction, and recognizing the operating system indicated by the awakening parameters; if the awakening parameters indicate to awaken the first operating system, switching the first operating system into a working state; if the awakening parameters indicate to awaken the second operating system, switching the second operating system into the working state.

The invention discloses a control method of composite actions of a crane, which is used for controlling total flow of hydraulic oil to be distributed to multiple actuators. The liquid-feeding flow of each actuator is controlled by regulating the opening of a control valve; and the motion speed of at least one actuator is obtained in real time by using the control method, and the judgment result of regulating the opening of the valve port of the controller valve used for controlling the liquid-feeding flow of each actuator is obtained according to the fact that whether the motion speed of at least one actuator meets preset judgment conditions. Through the analysis of engineering mechanical composite actions, the preset judgment conditions of regulating the opening of the vale port of the control valve are determined, thereby effectively controlling the flow distribution from the total flow to the actuators based on the motion speeds of the actuators in real time. In addition, the invention also provides a controller and the crane with the controller.

The invention discloses a front floor lower beam connecting structure of a battery-changing type electric vehicle body. The front floor lower beam connecting structure comprises a vehicle body front floor, a front floor lower beam is arranged in front below the vehicle body front floor, the two ends of the front floor lower beam are fixedly connected with front floor side longitudinal beams, the middle of the front floor lower beam is fixedly connected with a middle channel, the rear ends of vehicle body front longitudinal beams are fixedly connected with the front floor lower beam, and the front ends of front floor inner longitudinal beams are fixedly connected with the front floor lower beam. The front floor lower beam connecting structure is simple, convenient to assemble and reliable to use, and installs and fixes a vehicle battery pack without substantially changing a traditional vehicle body structure, meanwhile, longitudinal and transverse rigidity of the lower portion of an electric vehicle body floor is guaranteed, the performance of resisting front face and side face collision of the vehicle body is effectively improved, the safety and the stability of an electric vehicle are improved, the manufacturing cost of the electric vehicle is lowered, and the consumed tooling time for the electric vehicle is shortened.

The invention discloses an anti-vibration machine vision detection method of foreign matters in a liquid medicine. The detection method comprises the following steps of: step 1, obtaining images; step 2, matching the images: carrying out matching pre-processing on adjacent frame gray level images by utilizing a relevant sub-pixel image matching algorithm based on a hill-climbing search phase; step 3: carrying out inter-frame difference: carrying out difference on the matched adjacent frame gray level images to remove static background information and keep movable foreign matter information; step 4: detecting a target: carrying out binary segmentation and connected domain search on the images obtained by the inter-frame difference, calculating area of each foreign matter area and finding out the largest foreign matter area; and step 5, judging a decision: judging whether an existing product is an inferior-quality product by judging whether the largest foreign matter area exceeds a standard, and finishing the detection process. The anti-vibration machine vision detection method of the foreign matters in the liquid medicine, disclosed by the invention, has the advantages of capability of effectively eliminating the vibration interference of an electromechanical system, strong robustness and capability of greatly reducing designing and manufacturing costs of detection equipment ofthe foreign matters in the liquid medicine.

The invention discloses a multifunctional machining clamp for clamping. The multifunctional machining clamp for clamping consists of two alignment keys, a base, two bearing covers, a right-handed rotating jaw body, two reticulated plain-end clamping plates, a lead screw, a left-handed rotating jaw body, two horizontal shaft clamping plates, two V-shaped clamping plates and two double-V-shaped clamping plates. The multifunctional machining clamp can achieve clamping of clamping plate type parts, shaft type parts and plate sleeve type parts. The mounting-dismounting work amount of the clamp can be remarkably reduced, the design and manufacturing costs of the clamp can be reduced, and the process cost of machined workpieces can be reduced. The clamp is good in universality, quick and convenient to clamp, simple in structure and easy to manufacture.

The invention relates to a gas protection device, and in particular relates to a local inert gas protection device for the laser deposition repair of metal parts, belonging to the technical field of laser processing. The local inert gas protection device is compact in structure and stable in performances, can meet the space requirement of test installation, and is low in design and manufacture costs, simple and practical; a stand column of a movement executing mechanism at the upper end of a coaxial powder feeding nozzle is connected with the to-be-repaired part of a titanium alloy part by a soft seal cover. Therefore, a locally sealed flexible atmosphere protection chamber is formed between the part and the stand column, and an inert gas inlet, an inert gas outlet and interfaces of various gas sensors are reserved in the soft seal cover, so that the contents of all gases in the sealed atmosphere chamber can be conveniently detected, the whole titanium alloy part can be repaired in the presence of the purer inert gas, and a better laser repair effect can be further achieved.

The invention provides a method and a system for realizing video region-of-interest intelligent coding in a dynamic scene. The method comprises the following steps: acquiring batch pictures of video images; splicing the pictures to obtain a panoramic picture; analyzing the plurality of panoramic pictures, and establishing a foreground area model of the panoramic pictures; comparing the picture with the foreground area model to determine a foreground area of the picture; determining code rates of the foreground area and the background area by combining the maximum bandwidth according to the size ratio of the foreground area to the picture; and encoding the picture according to the determined code rate. By comparing the picture with the corresponding foreground area model in real time, the foreground area of the marked video image can be automatically identified, and then the intelligent coding technology of the interested area is used for coding, so that the camera with the changed shooting position and angle can obtain the optimal image quality under the limited bandwidth; when the technical scheme is applied to a video monitoring system, a large amount of computing work is placedat the rear end, a CPU and power consumption resources of the camera are saved, and the design and manufacturing cost of the camera is reduced.

The embodiment of the invention discloses a terminal and an audio signal output method, which relate to the technical field of signal processing and are designed for saving the cost of a two-in-one scheme of a loudspeaker and a receiver. The terminal of the embodiment comprises a loudspeaker signal channel which is used for forming receiver signals and outputting the receiver signals and comprises a power amplification module. The embodiment of the invention also provides the audio signal output method which comprises the following steps of: forming the receiver signals; and outputting the receiver signals by the loudspeaker signal channel, wherein the loudspeaker signal channel comprises the power amplification module. The embodiment of the invention is used for outputting audio signals.

The invention discloses a liquid viscosity transmission tester with a hydraulic load device. The liquid viscosity transmission tester with the hydraulic load device comprises an oil supplying system and a simulation load loading system; an oil supplying system loop is connected with an oil supplying oil path coarse filter, a gear oil pump, an overflow valve, a speed regulating valve, a cooler, a liquid viscosity host, a flowmeter and an oil tank in sequence by a hydraulic pipeline. According to the simulation load loading system, a vane pump is adopted to replace the load device to load; the liquid viscosity host drives the load vane pump to work by the connection of a coupler; a simulation load loading system loop is connected with a load oil path coarse filter, the vane pump, a pilot operated compound relief valve and the oil tank in sequence by a hydraulic pipeline. The liquid viscosity transmission tester with the hydraulic load device is suitable for the test research of a liquid viscosity transmission technology, the system is greatly simplified while the basic demands of the test are met, so the system structure is deeply optimized and the design cost and the manufacturing cost are saved; the load loading system is closer to an actual working condition, so the system is more practical and reliable and has broad use value.

The invention relates to the field of computer system structure and integrated circuit design, and a high-speed memory chip having a plurality of independent access channels is disclosed, including anon-chip memory and several high-speed serial access channels. A network-on-chip interconnect module is also included. The on-chip memory includes a plurality of memory sub-blocks accessible in parallel, and the memory sub-blocks and the high speed serial access channels are interconnected by the on-chip interconnect network module, and the on-chip interconnect network module being implemented ina single bus, a multi-bus, a ring network, a two-dimensional mesh, or a crossbar switch. The invention has a high-speed memory chip with a plurality of independent access channels, has good bandwidthexpansibility, realizes the shared parallel access of a plurality of main control chips to the memory chip and the data sharing and exchange among the plurality of main control chips, integrates storage and processing, and reduces the total storage cost of the system and the design and manufacture cost of the memory chip.

A wire-traction wall lifting and carrying combining mechanism relates to a carrying mechanism used in the fields of construction and wall repair and comprises a loading lifting basket, two counterweight drive devices, two counterweight-free drive devices and two counterweights, the loading lifting basket is provided with lugs, the counterweight drive devices are distributed above the loading lifting basket laterally, each counterweight drive device comprises a driving motor, a speed reducer, a friction roll, a fixed pulley, a support and a steel wire and the like, the steel wire penetrate through the friction roll with a helical groove and the fixed pulley, and two ends of the steel wire are connected with the lugs and the counterweights respectively. The counterweight-free drive devices are distributed below the loading lifting basket and each counterweight-free drive device comprises a driving motor, a speed reducer, a winding roll, a fixed pulley, a support and a steel wire and the like, wherein one end of the steel wire is wound on the friction roll with the helical groove, and the other end of the steel wire penetrates through the fixed pulley to be connected with the lugs. The other drive devices are correspondingly identical with the above structure. The wire-traction wall lifting and carrying combining mechanism is large in working space, high in supporting rigidity, stable in working performance and low in energy consumption.

The invention discloses a sucker height automatic control method for sucker type clamps of a manipulator and belongs to the technical field of sucker type clamps of the manipulators. The key point of the sucker height automatic control method is to control sucker height of the sucker type clamps of the manipulator by controlling movement of air cylinders connected to the upper portions of the suckers. A closed space is formed after the suckers make contact with the surface of a workpiece and is of vacuum degree, the signal of the vacuum degree is fed back to a control system by a digital vacuum manometer so as to adjust movement of the air cylinders. By the sucker height automatic control method, sucker height can be controlled online, and new suction surface is formed by controlling the sucker height without changing of the clamps so as to meet suction requirements for novel products on a production line. Besides, by the sucker height automatic control method, flexibility of the sucker type clamps of the manipulator is improved greatly so that the requirement for flexible production of the modern production line is met well, while manufacturing cost for design of the clamps is lowered greatly; therefore remarkable economic benefit is achieved.

The invention provides a generalized photonic crystal acoustic shield which comprises a generalized photonic crystal column shell and a generalized photonic crystal semispherical shell connected with the generalized photonic crystal column shell. An annular boss is arranged at the bottom end of the generalized photonic crystal column shell, threaded holes are formed in the annular boss in the circumferential direction, the annular boss is connected with a base, and the generalized photonic crystal column shell and the generalized photonic crystal semispherical shell are at least provided with two cycle components from inside to outside. Each cycle component is composed of a nonmetal layer and a metal layer in sequence from inside to outside, wherein the nonmetal layer and the metal layer are attached to each other. The cycle components are attached mutually. The generalized photonic crystal acoustic shield has the advantages of being high in sound insulation, easy to mount, demount and transport, low in design and manufacturing cost and the like, and the generalized photonic crystal acoustic shield has the good vibration reduction effect on vibration within a band gap range.

The invention provides a water flow power generation device which comprises at least one support, water wheels, a transmission and a power generator, wherein the transmission and the power generator are driven by the water wheels; each support comprises an upper support and a lower support; a tip-angle-shaped commutating body A is fixedly connected between the upper support and the lower support and close to the water inlet ends of the water wheels; at least two water wheels which rotate backward are fixed between the upper support and the lower support, and the blades of the adjacent water wheels are staggered mutually; the same ends of the water wheels are respectively connected with synchronizing gears which can be meshed mutually; and the power generator is connected with a water wheel shaft, the synchronizing gears and the water wheels through the transmission. Under the effect of the synchronizing gears, each water wheel can simultaneously rotate backward, the mutual collision and interference of the blades of the adjacent water wheels can not happen, the torsion force of each water wheel can be transmitted to the power generator for generating power, not only can the utilization ratio of the water energy be improved, but also the power generation efficiency can be improved, the integral power generation device has a simple structure and low design and manufacturing cost, is convenient to install, and can be widely used in various water flows.

The invention discloses a method for quantitatively detecting welding spatter by utilizing the acoustic emission signal energy equivalent of a resistance spot welding process. The method comprises the steps of collecting a structural load acoustic emission signal of the resistance spot welding process in real time, and drawing a dynamic oscillogram; extracting the acoustic emission signal of the welding spatter; counting the amplitude distribution of signal pulses; classing the amplitude into a plurality of grades Mi, and respectively accumulating according to the ringing count Ni of the acoustic emission signals exceeding the amplitude grades; taking an X axis as an amplitude grade value Mi and Y axis as a log value log10Ni of acoustic emission signal ringing count, accumulated according to the acoustic emission signals exceeding the amplitude grades Mi, to obtain a spattering distribution diagram; performing linear fitting; according to a right-angled triangle formed by the fit line and the X axis and the Y axis, calculating the area of the triangle, which is the energy equivalent of the welding spatter in the corresponding resistance spot welding process. The higher the equivalent value is, the greater the welding spatter is, namely that the larger the influence of the welding spatter on the molten core quality is. According to the method, the size grade and mode of the welding spatter can be accurately and quantitatively evaluated, and the fast, accurate and quantitative detection on the welding spatter of the resistance spot welding can be realized.

The invention relates to a fully-automatic vertical type circular seam welder which comprises a control console, a pressing mechanism, a welding gun, a rotary mechanism, a speed reducer and a motor, wherein the rotary mechanism is fixedly arranged on a rack of the control console in a vertical mode; the rotary mechanism is connected with the motor through the speed reducer; both the pressing mechanism and the welding gun are arranged above the rotary mechanism through the bracket; the pressing mechanism is equipped with a workpiece pressing column; the workpiece pressing column is in controlled connection with an air cylinder; the welding gun is equipped on the bracket through a welding gun clamp and is in controlled connection with the air cylinder; and an air cylinder on the pressing mechanism, an air cylinder connected with the welding gun and the motor are in controlled connection with a relay. The machine body of the circular seam welder adopts a vertical type structure, so that the circular seam welder is compact in structure and is small in floor space. In a welding process, a workpiece rotates on the horizontal plane, so that complex clamping positioning is not needed, and therefore, the operation is convenient and quick.

The invention discloses an accessory milling head base. The accessory milling head base comprises at least one accessory milling head, and also comprises a support fixed on the base and a slide platform matched with the support through an upper guide pair for bearing the accessory milling head; a combined switch which is arranged on the lower side of the tail of the slide platform, the switch is transversally and uniformly distributed, and guide bar arranged downward; actuators which are arranged on the upper side of the support for triggering the combined switch, the actuators comprise longitudinally distributed accessory milling head actuators with the quantity corresponding to the quantity of the accessory milling head, the spacing of the actuators corresponds to the spacing of the accessory milling heads, the actuators correspond to the switch, and when the accessory milling heads is moved to the replacing position, the corresponding switch is triggered by the corresponding actuator; and a motor which is used for driving the slide platform through a mechanical drive unit. The invention provides an accessory milling head base which can realize automatic conveying of the accessory milling heads according to a numerical control command.

The invention provides a multifunctional snow-removal, cleaning and watering trolley based on wifi control. The trolley has the functions of snow removal, ice removal, ground cleaning, ground watering and flower and tree watering outdoors. The trolley is characterized in that a combined type power head is adopted, manufacturing, adjusting and maintaining are easy, and cost is low; wifi control is adopted, and the trolley can be remotely controlled to operate; solar cell panels are used for collecting energy, the environment is protected, and energy is saved; the trolley is small in size and modularized, functions are customized, and the trolley can be used for all-year-round ground cleaning and maintaining at the areas of campuses, communities and the like. The protected rights and interests of the trolley comprise (1) the structure design that assembled type snow and ice removing and cleaning multifunctional spiral tool rests are arranged at intervals and blades and brushes are combined, (2) wifi control configuration, (3) the configuration and structure design of ground watering and flower and tree watering function modules, including a spiral lifting device structure, a water pump, sprayers and control configuration, and (4) configuration of an assembled type trolley body structure and an adapter.