47results about How to "Guaranteed to work properly" patented technology

The invention relates to a method and device for pushing recommendation information. The method includes the steps that a local area network to which a first terminal is connected is determined; an MAC address of a second terminal in the local area network is inquired, wherein the second terminal is any terminal in the local area network except for the first terminal; an inquiry command of recommendation information corresponding to the MAC address is sent to a server, wherein recommendation information is user behavior information generated on the second terminal by the server; when the recommendation information, corresponding to the MAC address, sent by the server is received, the recommendation information is displayed on the first terminal. Due to the fact that the first terminal and the second terminal are both in the same local area network, it shows that a user of the first terminal and a user of the second terminal are the same user, the recommendation information, corresponding to the MAC address of the second terminal, prestored in the server is sent to the first terminal for display, and it can be guaranteed that the recommendation information pushed to the first terminal is suitable for the user owning the first terminal.

The invention discloses an electric transmission system of a dual-power metro grinding car. The electric transmission system comprises a high-voltage electric appliance box, an electric reactor, a traction inverter, a traction motor, an auxiliary power generator, a three-phase rectifier cabinet, a grinding inverter and a grinding device, wherein power can be supplied to the traction motor and the grinding inverter through a contact grid, or power can be supplied to the traction motor and the grinding device through the auxiliary power generator. The invention further provides a power switching method for the dual-power metro grinding car. According to the method, seamless switching of the power supply between the contact grid and the auxiliary power generator can be realized. The electric transmission system has the advantages of being convenient to maintain, lower in energy consumption and pollution, and friendly to the environment; the power switching method has the advantages that the dual-power metro grinding car needs not to be shut down in the switching process, the flexibility and the convenience are guaranteed, the voltage is kept stable during the switching of the power supply, and the normal operation of the dual-power metro grinding car is not impacted.

The invention discloses a power-saving controller for delaying outage. The power-saving controller is capable of automatically detecting shutdown or abnormal power-off signals of a power device with high power and enables the power device to be disconnected with a supply network in the set time, and the requirement of users for using a power device with small power in a short time can be met while the power is saved and used safely. After being triggered, at first, the power-saving controller connects the supply network with the power device, and meanwhile, an outage delay progress in the power-saving controller starts working; the outage delay progress is used for timing, and in the timing process, if the power of a supply line is smaller than a preset threshold value all the time, the power device and the supply network are disconnected when the delay time t is reached; if the power is larger than the threshold value, the outage delay progress is automatically stopped; hereafter, the power of the supply line continues to be detected, and once the power is smaller than the threshold, the outage delay progress is restarted again.

The invention discloses a method and device for controlling range extender starting and a range extending type electric vehicle, and relates to the technical field of electric vehicles. The purpose isto determine whether a range extender is controlled to be started or not according to the current environment where the range extending type electric vehicle is located, so that it is ensured that the range extending type electric vehicle can be suitable for the environment having strict requirements for exhaust emission and noise pollution. The method includes the steps of receiving current position information, sent by a car navigation system, of the range extending type electric vehicle; obtaining the current remaining power of a power battery, and determining whether preset conditions forstarting the range extender are met or not according to the current remaining power and the current position information; and if the preset conditions for starting the range extender are met, controlling to start the range extender. The method and device are applicable to the start-up process of the range extender controlled by a vehicle controller VCU.

The invention provides a double sealing structure of a disc brake and belongs to the technical field of machinery. A problem that the sealing effect obtained by an existing double sealing structure ofthe disc brake is not ideal can be solved by the structure. The disc brake comprises a caliper body, rotating units axially limited into the caliper body, and screw rods connected to the interiors of the rotating unit by threads, the lower ends of the screw rods penetrate out of the lower end of the caliper body and the rotating units can rotate relative to the screw rods; the double sealing structure comprises a sealing unit II and a sealing unit I which is positioned between the caliper body and the lower ends of the screw rods and can deform along with the movement of the screw rods, therotating units are sleeved with the sealing unit II, the outer side of the sealing unit II is fixed in the caliper body, the inner side of the sealing unit II is provided with an annular sealing portion with elasticity, and the inner wall of the annular sealing portion always abuts against the outer side walls of the rotating units under the elastic force. The double sealing structure of the discbrake has the advantages of simple structure, long service life, good sealing effect and the like.

An embodiment of the invention provides a coaxial mercury relay. The coaxial mercury relay comprises a shielding shell, a hollow coil, a first center conductor, a second center conductor, a mercury tube, a coaxial connector and a shielding layer, wherein the hollow coil is arranged on the inner side of the shielding shell; the shielding layer is arranged on the inner side of the hollow coil; the first center conductor, the second center conductor and the mercury tube are all arranged on the inner side of the shielding layer, and the first center conductor and the second center conductor are connected with the two ends of the mercury tube in the central position of the hollow coil respectively; the end parts, not connected with the mercury tube, of the first center conductor and the secondcenter conductor are both connected with the coaxial connector; the coaxial connectors, the first center conductor, the second center conductor and the mercury tube are coaxial; and a high-pressure-resistant insulating material is filled in the shielding layer. The coaxial mercury relay provided by the invention is of a single-pole single-throw type, and the problems that contact points of a current coaxial switch are oxidized, an arc is easily generated and the high-voltage resistance is insufficient are solved; and meanwhile, the problem of impedance mismatching of existing mercury switch ports is solved.

The invention discloses a flaw detection device of a buffer spring. The flaw detection device of the buffer spring comprises a fixing seat, a rotary support, a roller, a connecting shaft and a rotary motor, wherein support seats are arranged at two ends of the fixing seat; transversely arranged fixing plates are arranged on the support seats; a piston of a first cylinder on each fixing plate is connected with a movable plate; a clamping electrode plate is arranged at one end of the movable plate; circumferential magnetic threading bars inserted into the buffer spring are arranged near the movable plate; the circumferential magnetic threading bars are oppositely arranged and respectively insulated with the movable plate and the clamping electrode plate; the clamping electrode plate and the two circumferential magnetic threading bars are connected with two poles of an external power supply; a convex arc surface is arranged at the end part of one circumferential magnetic threading bar; and a concave arc surface is arranged at the end corresponding to the other circumferential magnetic threading bar, and the convex arc surface is matched with the concave arc surface. By adopting the flaw detection device, the magnetization intensity and the magnetic field distribution of the circumferential magnetic threading bars can be improved; a magnetization effect of the buffer spring for flaw detection is ensured; and interference in a magnetic circuit is avoided, and the flaw detection device can be widely applied to the fields of manufacturing and overhauling of railway vehicles.

The invention discloses an optical machine assembly of projection equipment and the projection equipment, relates to the technical field of the projection equipment, and aims to solve the problems that the definition and the resolution of a projection picture are reduced after the existing projection equipment works for a period of time, and the picture quality requirement cannot be met. The optical machine assembly of the projection equipment comprises a digital micro-mirror element, a galvanometer assembly, a shielding piece and a heat dissipation device, wherein the galvanometer assembly comprises a galvanometer, the galvanometer is located on the light path of first reflected light, the first reflected light is the light reflected when a micro lens of the digital micro-mirror element is in an on state, the shielding piece is located on the light incident side of the galvanometer assembly, located outside the light path of the first reflected light and located on the light path of second reflected light so as to shield the second reflected light, the second reflected light is the light reflected when the micro lens of the digital micro-mirror element is in an off state, and theheat dissipation device is used for dissipating heat of the shielding piece. The optical machine assembly can be used in the projection equipment.

The invention provides a phase sequence identification and phase locking method for a three-phase grid-connected inverter. The method comprises the following steps: configuring a power grid phase sequence identifier which is identified by a phase lock; configuring switching frequency sampling, configuring switching frequency sampling interruption, sampling the three-phase power grid voltage, and obtaining the three-phase power grid voltage for phase locking according to the three-phase power grid voltage; performing coordinate transformation on the three-phase power grid voltage for phase locking to obtain a component Uq on a Q axis under a rotating coordinate system; configuring a sampling circuit to obtain a power grid zero-crossing signal, and judging a power grid identifier; and determining a phase-locked identifier according to the zero-crossing time of the zero-crossing signal, the technical problem that in the prior art, a common phase sequence identification method fails in environments with large power grid harmonics such as a weak power grid, the phase sequence cannot be normally identified, and phase locking cannot be performed is solved, so that the grid-connected inverter can normally operate in the weak power grid and a non-weak power grid, and the applicability of the grid-connected inverter is improved.

The invention discloses a multi-unmanned aerial vehicle base station three-dimensional coordinate calculation method under a channel estimation error. According to wireless transmission characteristics of an air-ground link between an unmanned aerial vehicle base station and a ground user, a probability-based unmanned aerial vehicle air-ground link channel error model is established, and a multi-unmanned aerial vehicle base station three-dimensional coordinate optimization problem taking a ground user coverage rate as an optimization target and taking a signal transmission interruption probability as a constraint condition is constructed. An unmanned aerial vehicle base station signal transmission outage probability analytical expression under a channel estimation error is deduced; a proposed macro Q inverse function approximate calculation method is combined; obtaining a dominant expression between the pitch angle and the coverage radius of the unmanned aerial vehicle base station; furthermore, the three-dimensional coordinate optimization problem of the unmanned aerial vehicle base station is equivalently split into two sub-optimization problems taking a pitch angle and a groundtwo-dimensional coordinate as optimization variables, and a combined iterative algorithm based on a Newton method and a sequence convex approximation method is provided, so that the three-dimensionalcoordinates of the multiple unmanned aerial vehicle base stations under the maximum user coverage rate can be effectively calculated.

The invention relates to the technical field of terminal trimming and discloses a trimming device for terminals. The trimming device for the terminals comprises a feeding mechanism, a trimming mechanism and a terminal feeding disk. The feeding mechanism comprises a feeding groove with width adjustable and a locating assembly matched with the width of the feeding groove. The feeding groove and thelocating assembly are used for limiting movement locus of a terminal material belt. According to the trimming device for the terminals, automatic and continuous trimming can be conducted on the terminal material belt, and in addition, the trimming device for the terminals is applicable to terminal products of multiple models.

The invention discloses a method for machining and manufacturing an oil tank supporting frame. According to the method for machining and manufacturing the oil tank supporting frame, two mutually connected inclined surfaces enable a steel plate to be stressed overall, the steel plate is evenly stressed during machining, local stress concentration appearing on a bent portion of a formed supporting frame blank is reduced, the situation that a fatigue source is formed by fine cracks generated on the welded portion of the bent portion of the supporting frame in the user process after the supporting frame is welded to an oil tank is avoided, and the service life of the supporting frame is prolonged.

The invention provides a light transmittance control device and method. The control method is applied in a system comprising a light transmittance panel, a first photosensitive element, a second photosensitive element and a control circuit. The method comprises the steps that the first photosensitive element is used for detecting the intensity of light from the main view direction, the second photosensitive element is used for detecting the intensity of light from the non-main-view direction, the intensity of light from the main view direction and the intensity of light from the non-main-view direction are matched with multiple preset strategies comprising the light intensity constant strategy, the highlight strategy, the day and night strategy, the day strategy, the night strategy, the tunnel strategy and the bridge opening strategy through the control circuit, and after matching, the control circuit adjusts the light transmittance of a light transmittance panel through the matched strategies. According to the light transmittance control device and method, a user can reasonably and automatically adjust light transmittance at the time of day, night and day and night transition time, the light transmittance can be reasonably and automatically adjusted, and glare is effectively avoided.

The invention relates to a slag salvaging path planning method for a slag salvaging robot, and belongs to the technical field of hot galvanizing production processes and methods. According to the technical scheme, a slag salvaging working area in a zinc pot is divided into four areas at equal intervals along the stroke of the pot in the long edge direction, and the four areas are sequentially a first slagging-off area, a first slag salvaging area, a second slag salvaging area and a second slagging-off area from left to right. The slag salvaging path planning method has the beneficial effects that the slag salvaging working area is reasonably divided, the slagging-off and salvaging division of each area is clear, the stroke distance of slag salvaging is shortened, and the slag salvaging working efficiency of the slag salvaging robot is improved; meanwhile, the situation that zinc dross is bonded with the edge of the pot due to an original method is avoided, and normal work of functionsof robot equipment is guaranteed; and the cleanliness of the zinc liquid level after slag dredging operation is remarkably improved, stable operation of a production line is guaranteed, and the methodis suitable for application and popularization in the cold-rolling coating industry.

The invention discloses a peony seed oil-enriched natural children's lip protector and a preparation method thereof. The peony seed oil-enriched natural children's lip protector comprises a lip protector matrix and a lip protector auxiliary material, wherein the lip protector matrix is prepared from peony seed oil, natural beewax, olive-pomace oil, soybean lecithin, deionized water and glycerinum;the lip protector auxiliary material is prepared from phenoxyethanol and tocophery acetate. The peony seed oil-enriched natural children's lip protector disclosed by the invention is natural and non-irritant, used raw materials are all green, natural, safe and reliable, the adding amount of a bacteriostatic agent is far below the national standard, the peony seed oil-enriched natural children's lip protector contains no irritant or harmful component such as alcohol, hormone, pigment, essence and heavy metal and contains no common components of adult cosmetics being harmful to children's skin;due to the particularity of the main component-peony seed oil, the peony seed oil-enriched natural children's lip protector not only has moisturizing and moistening effects on double-lip skin, but also is capable of relieving discomfort feel of the lips and increasing the softness of the two lips and reducing fine lines of the lips, and the peony seed oil-enriched natural children's lip protectorhas the effects of resisting oxidation and ultraviolet rays and reducing pigment accumulation.

The invention discloses a joint-control board centralized control circuit system applied to indoor and outdoor units. The system comprises an outdoor unit and n indoor units, wherein an MCU is disposed inside the outdoor unit; an MCU is disposed in each indoor unit; the MCUs of all the indoor units are electrically connected to the MCU of the outdoor unit via a joint-control board centralized control circuit; the joint-control board centralized control circuit comprises n relays A and n relays B; the n relays B are in one-to-one correspondence with the MCUs of the n indoor units; and the n relays B are in one-to-one correspondence with the n relays A. Through application of the system disclosed by the invention, switching-on an switching-off signals of the multiple indoor units can be conveyed by a hardware circuit in an accurate and centralized manner in actual engineering, so that possible wrong judgments of the outdoor unit generated because the signals can be disturbed easily during communication conveying of the switching-on and switching-off signals can be avoided. In this way, normal and correct running of a whole air conditioner system can be ensured.

The invention belongs to the technical field of sensors and discloses a Hall current sensor with a strong anti-jamming capability. The Hall current sensor comprises a U-shaped silicon steel sheet anda shell; an opening in the top of the shell is of a hollow structure; a supporting plate is movably connected into the shell; the supporting plate is connected with the shell through a buffering mechanism; the upper surface of the supporting plate is fixedly connected with a supporting rod which is close to one end of the supporting plate; one end of the supporting rod is rotationally connected with a PCB through a rotation shaft; the PCB is connected with the supporting plated through a calibration mechanism; the upper surface of the PCB is fixedly connected with two symmetric mounting blocks; grooves are formed in the upper surfaces of the mounting blocks respectively; positions at two ends of the bottom end of the U-shaped silicon steel sheet, which are corresponding to the grooves, arefixedly connected with protruding blocks matched with the grooves; and one side of each protruding block, which is far away from the U-shaped silicon steel sheet, abuts against the groove bottom of the corresponding groove. The installation and current calibration of the Hall current sensor with the strong anti-jamming capability are facilitated; and the Hall current sensor has high impact resistance.

The invention relates to a new energy uncertainty planning method considering typical scene tolerance, and the method comprises the following steps: S1, carrying out the calculation according to the wind speed and illumination intensity data, and obtaining an RDG daily output curve sample; S2, randomly selecting a curve from the sample as a first curve in the initial center; S3, constructing an initial center; S4, calculating Euclidean distances from the remaining curves to K clustering centers , dividing the remaining curves into the corresponding clustering centers, and generating a K-classcurve set; S5, updating K clustering center curves; S6, judging whether a convergence condition is met or not; S7, adopting different K value clusters, calculating contour parameters of correspondingresults, and selecting an optimal cluster K value; S8, constructing a planning objective function, and establishing constraint conditions of the objective function; and S9, obtaining an optimal planning scheme of the renewable distributed energy by using a multi-objective optimization algorithm. The method guarantees that the planning result is suitable for as many operation scenes as possible.

The invention discloses a leveling control method and a leveling control system for a bearing base. The method comprises the steps that supporting legs for supporting the bearing base are controlled to extend, whether each supporting leg reaches preset torque or not is judged in real time, if not, the supporting legs are controlled to continue to extend, and if yes, the supporting legs are controlled to stop extending; whether the inclination angle of the bearing base reaches preset precision or not is judged, if yes, leveling of the bearing base is ended, and if not, the next step is carried out; and the supporting leg with the maximum elongation is used as a reference supporting leg. Compared with the prior art, the method and system have the advantages that the bearing base can be automatically leveled, so that the mounting angle of equipment mounted on the bearing base meets the precision requirement, the operation error of the equipment is reduced, if the gravity center of the equipment is changed during operation and the angle of the bearing base is changed, the bearing base leveling control method and system can carry out adjusting in time, the bearing base is adjusted to be horizontal, and normal work of the equipment is guaranteed.

The invention discloses a device for treating shale gas wastewater based on a disc tube type reverse osmosis membrane, which comprises a shell. An upper pressing plate and a lower pressing plate are arranged in the shell, a central screw rod is vertically arranged at the central position of the upper pressing plate and the lower pressing plate, and a clear water outlet is formed in the side surface of an upper positioning cushion block above the central screw rod. The upper plane of the upper pressing plate is respectively provided with a water inlet, a flushing water supply pipe and a concentrated solution outlet, the lower pressing plate is provided with a flushing water drainage pipe, an S-shaped flow guide disc and a membrane are arranged between the upper pressing plate and the lower pressing plate, one end of the membrane is horizontally arranged between the clamping blocks, and springs are arranged at the contact positions of the clamping blocks and the membrane. A clear water channel is arranged between the clamping block and the central screw rod, the clear water channel extends upwards to be communicated with a clear water outlet, a plurality of convex points protruding outwards are evenly arranged on the surfaces of the flow guide discs, and the membrane is horizontally arranged between the flow guide discs. The device has the advantages of high pollution rejection rate, good purification effect, long service life of the membrane, easy maintenance, and low investment and operation cost.

The invention relates to a safe and reliable miniature electronic water pump which comprises a support and a pump head. The support is provided with two installing through holes. Each installing through hole is provided with an installing mechanism. Each installing mechanism comprises an installing bolt matched with the corresponding installing through hole, and a stabilizing assembly arranged on the corresponding installing bolt. In the safe and reliable miniature electronic water pump, a first supporting pillar and a second supporting pillar are arranged on the two sides of each installing bolt. Meanwhile, a limiting column on a sealing plate is matched with a limiting groove so that the sealing plate can be firmly fixed above the installing bolts, thus, firmness of electronic water pump installation is improved, and reliability of electronic water pump work is improved. Moreover, when the support is installed on the installing face, an inverted-V-shaped open groove in the bottom of a buffering block begins deforming, and it is ensured that the buffering block can be attached to the installing face totally. Meanwhile, two limiting plates are used for limiting a buffering plate, the buffering plate can be vertically attached to the installing face, and thus it is ensured that the support can be suitable for various installing faces.

Provided is an aluminum wheel hub mould heating tool convenient and rapid to use. The aluminum wheel hub mould heating tool convenient and rapid to use is composed of a mould baking worktable, mould baking supporting pillars, a mould baking small supporting frame, a mould baking cross, a natural gas pipeline and a compressed air pipeline, wherein heat dissipation holes with the diameter being 30 mm are evenly distributed in the mould baking worktable, a bearing communicated with the compressed air pipeline and the natural gas pipeline is distributed in the middle of the mould baking worktable, the inner diameter of the bearing is matched with the inner diameter of the mould baking cross and the mould baking small supporting frame, and a lateral fire outlet and a lower air outlet are distributed in one end of the mould baking cross. In the mould baking process, a mould pouring gate is aligned at the bearing, the mould baking small supporting frame and the mould baking cross are assembled and are put into the bearing, natural gas and compressed air are transmitted to the mould baking cross and the mould baking small supporting frame through the bearing, the lateral fire outlet pushes the mould baking small supporting frame and the mould baking cross to rotate through the power of the natural gas and the compressed air, and therefore a mould is evenly heated in the entire mould baking process. The aluminum wheel hub mould heating tool convenient and rapid to use has the advantages of being even in heating and low in cost.

The invention discloses fixing equipment for solid wood floor paint spraying machining. The fixing equipment for solid wood floor paint spraying machining comprises a fixing seat, and the fixing seatis connected with a protective shell through bolts; a transversely-arranged connection rod is fixedly installed at the top end of the interior of the protective shell, and the two ends of the connection rod are slidably connected with fixing frames; the top ends of the fixing frames are fixedly connected with clamping plates through strengthening rib plates, and the bottom ends of the two fixing frames are rotationally connected with a first rotary wheel and a second rotary wheel through rotary shafts correspondingly; and the lower end surface of the center of the connection rod is fixedly provided with a convex block. According to the fixing equipment, by arranging a first rotary wheel, a second rotary wheel, the fixing frames, the connection rod, a first gear and a second gear, the firstgear is in engaged connection with the second gear, thus, a first winding roller and a second winding roller rotate reversely, the fixing frames and the clamping plates are pulled to slide towards the center of the connection rod, and a solid wood floor can be clamped and fixed.

The invention provides a photoelectric composite cable used for a coal mine, relates to a cable, in particular to a signal and electric energy transmitting cable used for a mine vertical shaft. The cable comprises mutually twisted insulated cable cores, a fiber optics bundle is arranged between the twisted insulated cable cores, a polyethylene inner sheath layer is arranged outside the twisted insulated cable cores, a steel wire armoured layer is arranged outside the polyethylene inner sheath layer, a blue flame retardant PVC outer sheath layer is arranged outside the steel wire armoured layer, and packing is arranged between the twisted insulated cable cores and the polyethylene inner sheath layer. The cable has a good signal transmission effect, and is strong in anti-pulling performance.

The invention relates to a safe and reliable miniature electronic water pump which comprises a support and a pump head. The support is provided with two installing through holes. Each installing through hole is provided with an installing mechanism. Each installing mechanism comprises an installing bolt matched with the corresponding installing through hole, and a stabilizing assembly arranged on the corresponding installing bolt. In the safe and reliable miniature electronic water pump, a first supporting pillar and a second supporting pillar are arranged on the two sides of each installing bolt. Meanwhile, a limiting column on a sealing plate is matched with a limiting groove so that the sealing plate can be firmly fixed above the installing bolts, thus, firmness of electronic water pump installation is improved, and reliability of electronic water pump work is improved. Moreover, when the support is installed on the installing face, an inverted-V-shaped open groove in the bottom of a buffering block begins deforming, and it is ensured that the buffering block can be attached to the installing face totally. Meanwhile, two limiting plates are used for limiting a buffering plate, the buffering plate can be vertically attached to the installing face, and thus it is ensured that the support can be suitable for various installing faces.

The invention relates to the technical field of medical devices, and discloses a traditional Chinese medicine orthopedic clip for fumigation of fractures with traditional Chinese medicine, including a fixing clip. The fixing clip includes: a fixing block, a fastening nut, a first slide rail, a guide rail, a chute, The guide groove, the arc groove, and the moving groove, the soft metal plate includes: a groove, a block and a first spring, and the metal mesh bag includes: a boss, an annular groove, an annular pad and a second spring. Squeeze the block with the ball at the lower end of the boss until the block is located on the lower side of the ring pad, stop squeezing the metal mesh bag, the metal mesh bag is fixedly connected to the soft metal plate through the boss, when the metal mesh bag needs to be removed , press the metal mesh bag to move down until the block is on the upper side of the ring pad, then pull the metal mesh bag up, the block successfully exits through the ring pad, this structure ensures the metal mesh bag is fixed and the replacement of herbs is convenient, thus solving the problem The traditional Chinese medicine orthopedic folder fumigated at the fracture site is inconvenient to apply medicine.

The invention discloses an industrial robot kinematics parameter estimation method which comprises the following steps: 1, establishing an industrial robot kinematics model and a coordinate system of each joint by using standard D-H parameters, 2, completing calibration of a tool coordinate system through a single-axis rotation method, 3, the robot kinematic model and the tool coordinate system are combined with the robot tail end pose relation to establish a kinematic parameter estimation distance error model; 4, redundant parameters in the error model are removed, and a Dog-Leg algorithm is used for optimizing industrial robot kinematic parameters. Through the consistency of the distance between two points in different coordinate systems, calibration of the pose relation from the coordinate system of the measuring device to the coordinate system of the robot is avoided, the precision of the measuring system can be improved, and the kinematics parameters of the industrial robot can be accurately estimated.

The invention discloses an oil tank bracket machining die. The oil tank bracket machining die comprises an upper die seat and a lower die seat, wherein the upper die seat is provided with a male die, the lower die seat is provided with a female die, a shaping block is mounted in the female die, upper surfaces of the shaping block are two inclining faces which are connected with each other, a shaping groove is formed in the shaping block, a discharging cavity is formed in the lower die seat, a stop plate is mounted in the discharging cavity and connected with the bottom of the discharging cavity via springs, and discharging rods penetrating through the lower die seat, the female die and the shaping die and higher than the bottom of the shaping block are mounted on the stop plate. By the aid of the two connected inclining faces, a steel sheet can be stressed integrally, so that the steel sheet can be uniformly stressed during machining, partial stress concentration at bending positions of shaped bracket blanks is lowered, bracket are protected from fatigue sources resulted from tiny cracks at the welded bending positions of the bracket in the usage process after the bracket is welded with an oil tank, and service life of the oil tank bracket is prolonged.