222results about How to "Prevent thermal deformation" patented technology

The invention relates to a porous structure manufactured through laser powder bed melting additive manufacturing, in particular to a gradient porous structure with excellent mechanical property and functionality and an LPBF self-adaptive input manufacturing method of the gradient porous structure. According to the method, basic geometric parameters and gradient characteristics of the gradient porous structure are defined by utilizing Grasshopper parameterization design software. A gradient porous structure with excellent mechanical properties and functionality is generated through a grasshopper plug-in of software, and smooth transition from a solid state to a porous state is achieved. An LPBF technology is adopted and combined with an angle partitioning strategy, the gradient porous structure is melted layer by layer, the gradient porous structure is partitioned according to the strut suspension angle on the basis of optimizing process parameters, the optimized process parameters are applied to a model of the partitioned region, and the gradient porous structure is obtained. Scanning of each layer of the overhanging supporting columns at different angles is in appropriate laser parameter input, and the problems of deformation and high porosity caused by heat accumulation in the LPBF process are effectively solved.

The invention relates to a high-temperature-resistant nylon engineering plastic and a preparation method thereof, and belongs to the technical field of high polymer materials. The high-temperature-resistant nylon engineering plastic comprises the following components in parts by weight: 80-120 parts of nylon resin, 4-6 parts of inorganic filler, 4-6 parts of glass fiber, 2-10 parts of a heat-resistant modifier, 1-2 parts of a coupling agent, 1-3 parts of polyethylene wax, 0.5-1.5 parts of an antioxidant and 1-2 parts of a flame retardant, carbonyl and maleimide groups of the heat-resistant modifier strengthen intermolecular interaction and improve the glass transition temperature and the melting point, intermediate products 1 and 2 strengthen high temperature resistance, in addition, sulfonyl attracts electrons to strengthen thermal stability, tetrahydrofuran ring and acrylate are resistant to decomposition, and stability and water resistance are improved; boron and nitrogen of the flame retardant cooperate, a B-O-C carbon layer is formed at high temperature, flame-retardant gas is released, the flame-retardant property is remarkably improved, and the high-temperature-resistant nylon engineering plastic prepared by the preparation method has good high-temperature-resistant and water-resistant effects and also has excellent flame-retardant property.

The invention relates to the technical field of castable, and discloses a silicon carbide castable which comprises main materials and auxiliary materials, the main materials comprise 30-70 parts of silicon carbide particles, 5-20 parts of micro powder which is silicon carbide micro powder, 5-20 parts of nano aluminum oxide, 5-20 parts of a phase change material and 5-20 parts of reinforced fibers, and the auxiliary materials comprise a binding agent, an additive, a heat stabilizer, a high-heat-conductivity additive and an antioxidant. The phase-change material is a metal alloy phase-change material, and the reinforcing fiber is 5-20 parts of steel fiber. The binding agent is 10-15 parts of pure calcium aluminate cement, and the additive is 3-5 parts. In the preparation process of the silicon carbide castable, the steel fiber, the metal alloy phase change material and the graphite are added, the overall performance of the silicon carbide castable can be remarkably improved, the steel fiber can remarkably improve the toughness and mechanical strength of the silicon carbide castable, the castable can be effectively prevented from being heated to deform at a high temperature, shrinkage is inhibited, and a good prevention and treatment effect on microcracks is achieved; therefore, the overall stability and durability of the pouring material are improved.

The invention relates to the technical field of adjusting valve machining, and particularly discloses an adjusting valve part cutting machining device and a machining method thereof.The adjusting valve part cutting machining device comprises a feeding platform capable of loading and controlling a valve rod to move and a fixing frame, and is characterized in that a fixing ring is fixedly installed in the fixing frame, and a plurality of sliding grooves are formed in the side wall of the fixing ring; a sliding block capable of sliding is arranged in each sliding groove, and the sliding blocks slide centripetally or centrifugally. The adjustable cutters are arranged to cut the outer wall of the valve rod, so that stress between the outer wall of the valve rod and the cutters can be shared by the cutters, abrasion of cutter heads of the cutters is reduced, the service life of the cutters is prolonged, heat generated by friction between a single cutter and the outer wall of the valve rod can be reduced, and the service life of the cutters is prolonged. Thermal deformation of the tool bit caused by overheating of the tool bit due to long-time high-temperature influence can be avoided, the machining speed of the machine tool on the valve rod can be increased, and the cutting precision of the machine tool on the valve rod can be improved.

The present invention relates to the field of welding, and specifically to a welding device for the production of elongated die steel, including an installation assembly for supporting and installing the device as a whole, including four rectangularly distributed installation assemblies, two laterally distributed support columns connected with a support side beam; two docking assemblies, arranged inside the support side beam, for extruding and docking the die steel profile, including an electric push rod; a clamping assembly, arranged inside the docking assembly, for fixed installation and transportation of the die steel profile, including a cylinder; a transport track, for conveying the weld bead opening and welding operation, including an upper connecting beam and a lower connecting beam; a weld bead slotting member 1, slidably arranged on the top of the lower transport track. The present invention adopts a multi-program welding method and can weld elongated and thickened profiles to solve the problem that welding is prone to deformation and the welding efficiency of elongated and thickened profiles is low in the prior art.

The invention belongs to the technical field of semiconductor equipment, and discloses a vacuum chuck and processing equipment. The vacuum chuck comprises a chuck body and a positioning ring, silicon rings with different inner diameters can be positioned, the inner side, corresponding to the positioning ring, of the chuck body is provided with a drainage area, the outer side, corresponding to the positioning ring, of the chuck body is provided with an adsorption area, and when the adsorption area adsorbs the silicon rings, the inner sides of the silicon rings correspond to the drainage area, so that cooling water gathered in the silicon rings can be discharged from the drainage area; cooling water with grinding particles is prevented from being gathered in the silicon ring to influence the surface machining quality of the silicon ring; the suction cup body is further provided with the cooling water tank, cooling media in the cooling water tank can cool the suction cup body, and thermal deformation of the suction cup due to heat accumulation after multiple times of suction work is avoided.

The utility model relates to the technical field of coal injection guns, and mainly discloses a blast furnace coal injection gun which comprises a first feeding pipe, a second feeding pipe, an air inlet pipe, a first valve and a second valve, the outer wall of one end of the first feeding pipe is sleeved with the second feeding pipe in a sliding mode, and the other end of the first feeding pipe is vertically communicated with the air inlet pipe. The surface of one end of the first feeding pipe is sleeved with the air inlet pipe in a sliding mode, a first valve is arranged on the air inlet pipe, a second valve is arranged at the other end of the first feeding pipe, an air cylinder is arranged on the air inlet pipe, and an ejector rod of the air cylinder is connected with the second feeding pipe. The length of the whole equipment can be freely and automatically adjusted through the air cylinder according to needs, then pulverized coal is conveyed to a target area in a blast furnace, the pulverized coal conveying accuracy of the equipment is improved, and waste of pulverized coal raw materials is avoided; and a plurality of water storage grooves are formed in the pipe wall of the second feeding pipe and communicate with the water tank through switching blocks, cooling liquid is pumped into the water storage grooves through the water tank, the temperature of the second feeding pipe is absorbed, the second feeding pipe is prevented from being heated and deformed, and the service life of the equipment is prolonged.

The invention discloses a numerically-controlled machine tool capable of achieving reciprocating type cooling, and belongs to the field of numerically-controlled machine tools. A numerically-controlled machine tool capable of being cooled in a reciprocating mode comprises a machine tool body and further comprises a spindle box installed on one side of the top end of the machine tool body, a circulating assembly arranged in the machine tool body, a slag discharging structure arranged in a supporting plate and used for filtering and discharging chippings in cooling liquid, and a cooling structure arranged on one side of a ceiling. A cooling liquid and chipping separating function is integrated through the collecting tank, the cooling liquid and the chippings are separated, the cooling liquid smoothly penetrates through the filter plate, continuous purification and cyclic utilization are achieved, the chippings automatically slide to the bottom of the collecting tank, the chippings are discharged to a discharging opening through a scraper, the full-automatic chipping discharging process is achieved, the filter screen blocking problem is effectively prevented, and the service life of the chippings is prolonged. Long-term smooth circulation of the cooling liquid is guaranteed, and meanwhile it is guaranteed that chippings can be automatically concentrated and immediately removed.

A longitudinal sealing mechanism of a multi-row strip bag back sealing packaging machine comprises a collar turning device, a front longitudinal sealing mold and a rear longitudinal sealing mold, the collar turning device and the rear longitudinal sealing mold are fixed on a machine body of the packaging machine, and the longitudinal sealing mechanism is characterized in that the front longitudinal sealing mold comprises a cross beam and a plurality of pressing blocks evenly distributed on the inner side of the cross beam; the pressing blocks are obliquely mounted on the inner side of the cross beam and are in one-to-one correspondence with the oblique pressing surfaces on the outer sides of the forming holes; opening and closing air cylinders are symmetrically arranged on the inner side of the machine body, and one end of a piston rod of each opening and closing air cylinder is connected with two symmetrically-arranged supporting bases through a connecting plate and at least two sets of guiding assemblies. A driving shaft driven by a servo motor is arranged on the inner side of the machine body, eccentric shafts are rotatably installed in the two supporting seats respectively, the two ends of the driving shaft are in transmission connection with the corresponding eccentric shafts through double-crank mechanisms respectively, and the two ends of the cross beam are connected to eccentric sections of the eccentric shafts respectively. The longitudinal sealing device has the advantages of being stable in action, small in amplitude, even in sealing pressure and good in longitudinal sealing performance.

The utility model relates to the technical field of batteries, and provides a battery, which comprises a battery shell provided with a pole through hole; the battery cell is arranged in the battery shell; the battery core is electrically connected with the pole assembly, and the pole assembly is fixed on the battery shell by the first bending section and the second bending section; the plugging piece is arranged in the groove, and the plugging piece is connected with the pole assembly in a welding manner, so that a welding mark is formed on one side, deviating from the battery cell, of the plugging piece and / or the pole assembly; at least part of the insulating part is arranged between the pole assembly and the battery shell, the minimum vertical distance between the welding mark and the circumferential outer surface, facing the hole wall of the pole through hole, of the penetrating section is d, and d is larger than or equal to 0, so that the transfer distance of heat on the penetrating section in the welding process can be increased, the probability that the heat is transferred to the insulating part is reduced, and the welding quality of the battery is improved. Therefore, the insulating property and the sealing capability of the insulating part are ensured, and the safe use performance of the battery is improved.

The invention discloses a metal bent pipe surface treatment device, and relates to the technical field of metal bent pipe surface machining. The metal bent pipe surface treatment device comprises a fixed seat, a polishing mechanism is fixedly connected to the top of the fixed seat, a sweeping mechanism is fixedly connected to the interior of the polishing mechanism, and a sweeping mechanism is movably connected to the interior of the polishing mechanism. According to the surface treatment device for the metal bent pipe, the metal bent pipe can be ground through the grinding belt, the grinding belt only enables the part, disconnected from the metal bent pipe, of the grinding belt to be ground during grinding, the grinding position of the grinding belt continuously moves in a circulating mode, and an inner fixing ring can drive the grinding belt to rotate around the circumference of the metal bent pipe through a fixing frame; and the surface of the metal bent pipe is uniformly polished by the polishing belt, so that heat accumulation caused by continuous polishing of one part of the polishing belt is prevented, softening of the polishing belt due to heating and deformation of the metal bent pipe due to heating are prevented, and the machining efficiency is improved.

The invention discloses a laser cutting assembly and a laser cutting device, and belongs to the technical field of laser cutting, the laser cutting assembly comprises a rack, and a controller is fixedly mounted on the outer wall of one side of the rack; according to the laser cutting device, the stabilizing and flattening accessory and the joint cutting treatment accessory are arranged on the efficient cutting assembly in a matched mode, through the design, free and rapid position adjustment of the laser cutting assembly can be completed, the laser cutting device can be suitable for different cutting conditions, and meanwhile the cutting efficiency can be improved while material cutting is conducted. The synchronous cooling and heat dissipation treatment is carried out on the cutting area, so that the situation of thermal deformation or thermal stress of a workpiece caused by heat accumulation of the cutting area and generation of a heat affected area is effectively avoided, meanwhile, the cutting seam can be synchronously treated in the cutting process, and the cutting efficiency is improved. And the problem that the cutting quality is affected due to the defects such as burrs and cutting edge flaws easily occurring near a material cutting opening can be effectively solved, and the actual application effect of the overall structure is greatly improved.

The present invention discloses a machine tool grinding device for machining mechanical spare parts, and relates to the technical field of machine tools for machining mechanical spare parts. The present invention comprises a fuselage, wherein the fuselage is provided with a cavity, wherein the fuselage comprises a cross, wherein the cross is fixedly mounted on the top inner wall and the left and right side walls of the cavity of the fuselage, wherein a drilling device is arranged on the top of the fuselage, wherein a grinding device is arranged on the right side of the fuselage, wherein a debris removal mechanism is arranged on the bottom of the cavity of the fuselage, and wherein a material discharge and ejection device is arranged on the bottom of the fuselage. The present invention arranges the grinding device so that the telescopic push rod, the water storage column, the squeezing water bag, the grinding strip, the water outlet disc and the scraping plate cooperate with the frame plate, and the telescopic push rod pushes the squeezing water bag to drive the grinding strip to grind the borehole, thereby removing the rough and uneven parts inside and outside the borehole, making it smoother and more precise, thereby improving the dimensional accuracy and surface finish of the borehole.

The invention relates to a welding center and method for platform machining, and belongs to the technical field of welding equipment. The device comprises a rack, a gantry frame is slidably mounted on the upper surface of the rack, an air cylinder is slidably arranged at the bottom of a cross beam of the gantry frame, a mounting plate is fixed to the telescopic end of the air cylinder, and a welding head is mounted on the lower surface of the mounting plate; and fixing cylinders are further included, the two fixing cylinders are fixed to the left side and the right side of the lower surface of the mounting plate, and moving plates are slidably connected to the opposite faces of the two supporting vertical plates. According to the device, a single honeycomb platform is automatically clamped through a motor and a wedge block, a guide plate is matched for abutting, an elastic floating roller is matched for pressing, positioning is stable, a workpiece is not damaged, full-area cleaning and negative-pressure synchronous impurity removal are adopted before welding, welding defects are effectively avoided, initial pre-stretching is conducted in the welding process, and the welding efficiency is improved. And then the progressive secondary stretching is realized along with the linkage of the welding machine head, the stress is dynamically eliminated, the deformation is inhibited, and the flatness and the welding precision are greatly improved.

The application relates to a heating element, an atomization device and an aerosol generating system. The heating element comprises: a base body configured to form an atomization channel for accommodating an aerosol generating article; a first heating body arranged at one end of the base body to form a first heating area on a channel wall of the atomization channel, the first heating area being used for heating a medium section; and a second heating body arranged at the other end of the base body to form a second heating area on the channel wall of the atomization channel, the second heating area being arranged adjacent to the first heating area and being used for heating a functional section; wherein the base body is formed of a low-thermal-conductivity material. The heating element can separately control the temperatures of different areas of the base body by using the first heating body and the second heating body, thereby forming a more accurate regional temperature field distribution.

The present invention discloses a laser additive manufacturing scanning path area planning method considering overhang feature recognition, taking the three-dimensional model file of the part as the object, dividing the triangular facets into a set of overhang triangular facets and a set of non-overhang triangular facets; marking the overhang edge and establishing the overhang edge index when the tangent segment is intersected, and by traversing the slice contour, the slice contour line segment of the overhang mark is offset to the internal area of ​​the slice contour; the offset line segment contour is used as a dividing line to further divide the overhang area and the non-overhang area, and the laser additive manufacturing scanning path planning is performed on the overhang area and the non-overhang area. The present invention identifies and extracts the overhang triangular facets based on the three-dimensional model file information, and then divides the overhang area of ​​the two-dimensional slice contour, and performs path planning by deciding the appropriate scanning method for the feature area and the non-feature area, thereby ensuring the forming quality of the overhang structure of the part.

The present invention relates to an oven, comprising an inner tank, an outer shell, an air guide plate and a heat dissipation fan, wherein the inner tank is arranged in the outer shell and a gap is formed between the inner wall of the outer shell, the air guide plate is arranged at the top of the outer shell and a guide channel is formed between the top plate of the outer shell, an air inlet connected to the guide channel is opened at the rear of the air guide plate, and the air outlet of the guide channel extends to the front side of the outer shell, the heat dissipation fan is arranged on the air guide plate and provides power for cold air to enter the guide channel, and also comprises a guide pipe, the first port of the guide pipe is connected to the guide channel, and the second port of the guide pipe extends to the gap between the bottom of the inner tank and the bottom plate of the outer shell. The present invention is provided with a guide pipe that can introduce the cold air in the guide channel at the top of the oven into the bottom of the oven, the guide pipe introduces the cold air into the gap between the bottom of the inner tank and the bottom plate of the outer shell, and can take away and discharge the hot air there, thereby improving the heat dissipation effect of the bottom of the oven, reducing the temperature of the bottom of the oven, and thus avoiding the deformation of the cabinet due to heat and improving the service life of the cabinet.

The invention discloses aluminum alloy air expansion sleeve production drilling equipment with an overheating protection function, and relates to the technical field of aluminum alloy air expansion sleeve production, the aluminum alloy air expansion sleeve production drilling equipment comprises a table top and a movable plate, the movable plate is installed above the table top in a penetrating and sliding mode, and the aluminum alloy air expansion sleeve production drilling equipment further comprises a servo motor installed above the top of the table top through screws; the output end of the servo motor is connected with a threaded rod, the top of the rotating rod is provided with a row of water spraying discs, the row of water spraying discs are arranged at equal intervals, and the row of water spraying discs are connected with a water tank in a sealed mode through hoses. According to the aluminum alloy air expansion sleeve production drilling equipment with the overheating protection function, when a drill rod conducts drilling machining on an air expansion sleeve, a water source in a water tank is conveyed to a row of water spraying discs through a water pump to cool the air expansion sleeve, and therefore overheating protection can be conducted on the air expansion sleeve; and the phenomenon of thermal deformation of the air expansion sleeve due to high heat of drilling machining in the later period is avoided, and the drilling stability of the drilling equipment is improved.

This invention proposes a high-rigidity, high-precision external cylindrical grinding wheel spindle, comprising a housing, a spindle sleeve installed within the housing, and a shaft core rotatably installed within the spindle sleeve, the shaft core being supported by a front bearing assembly and a rear bearing assembly. It also includes a preload structure for applying and adjusting axial preload to the front bearing assembly, thereby enhancing the system rigidity of the shaft core. This invention improves the system rigidity of the grinding spindle by employing a four-section angular contact ball bearing layout at the front end of the spindle, combined with precision grinding of inner and outer spacers or thermal expansion compensation sleeves. This allows the spindle to withstand greater grinding forces and directly guarantees the highest rotational accuracy at the working end. The rear end of the spindle adopts a floating bearing assembly design, which eliminates destructive thermal stress and protects the preset precision preload state of the front bearing assembly, thus ensuring that the spindle maintains high precision throughout the entire temperature rise process.

The invention discloses a magnetic control nitriding device and a nitriding method. The magnetic control nitriding device comprises a furnace body assembly, a magnetic pole assembly, a workpiece mounting assembly, a gas conveying assembly, a source electrode power supply and a cathode power supply. Wherein the furnace body assembly is used for heating a workpiece and providing a sealed environment for ion nitriding; the magnetic pole assembly is used for generating a magnetic field to improve the ion nitriding effect through magnetic force. The workpiece mounting assembly is used for fixing a workpiece and enabling the workpiece to extend into the furnace body assembly; the gas conveying assembly is used for conveying gas required by ion nitriding into the furnace body assembly; and the source power supply and the cathode power supply are both used for outputting high-voltage electricity into the furnace body assembly. Nitriding is assisted by using the acting force of a magnetic field formed by the two magnetic pole assemblies, the working temperature of ion nitriding is reduced on the premise that the nitriding effect is achieved, and therefore the probability that a workpiece deforms at the high temperature is reduced; and the magnetic field position and the magnetic field intensity can be physically changed by moving the magnetic pole main body, so that the nitriding effect is adjusted.

The application relates to the technical field of high polymer composite materials, and particularly discloses a resin applied to motor rotor carbon fiber winding and a preparation method thereof. The resin comprises the following raw materials: 40-60 parts of a tetrafunctional phenolic epoxy resin, 20-40 parts of a biphenyl type epoxy resin, 15-20 parts of a core-shell rubber, 0.1-0.2 parts of triphenylphosphine, 20-25 parts of a curing agent, 0.5-1 part of an accelerator, 3-5 parts of nano fillers, 1-2 parts of a silane coupling agent and 5-8 parts of an active diluent. The resin prepared by the application has excellent high-temperature resistance and high elongation at break, and can be applied to motor rotor carbon fiber winding.

The utility model relates to PCB board processing technical field discloses a kind of PCB soft board processing heat curing equipment, including the processing box for the storage of PCB soft board, the lower end of the processing box is fixedly connected with the support frame for supporting processing box, hot air component for drying and curing to PCB soft board is installed in the processing box, and placing assembly for fixing PCB soft board is installed between the hot air component. The utility model realizes two-way heating by the hot air disc of symmetry up and down, makes PCB soft board double side synchronous heating, forms uniform temperature field, effectively prevents one-sided heating deformation, improves solvent evaporation and resin curing efficiency, and adopts knob type clamping mechanism cooperation rotation design, so that board material rotates at uniform speed in curing process, realizes three-dimensional heating, eliminates local overheating phenomenon, and heating uniformity deviation is lower, prevents material thermal deformation.

The application provides a bearing seat, an electric spindle assembly and a numerical control machine tool. The bearing seat comprises an outer seat body, an inner seat body, a damping structure and a cooling channel. The outer seat body forms an outer chamber, and the inner seat body is arranged in the outer chamber. A damping cavity is formed between the inner seat body and the outer seat body, and the damping structure is arranged in the damping cavity. The cooling channel is formed in the outer seat body, the inner seat body or the damping structure. The cooling effect and the damping effect are considered, the damping structure improves the support damping between the inner seat body and the outer seat body, and the vibration between the inner seat body and the outer seat body can be absorbed. The cooling liquid is introduced into the cooling channel, the heat generated by the high-speed rotation of the bearing can be taken away, the thermal deformation of the bearing and the bearing seat is prevented, the rotation accuracy of the electric spindle and the stability of the electric spindle operation are improved. The damping structure is formed by injecting a hot-melt glue type material into the damping cavity and solidifying, and the pressure of the damping cavity is not adjustable. The damping structure is formed by injecting metal powder, silicon oil or hydraulic oil into the damping cavity, and the pressure of the damping cavity is adjustable.

This invention discloses a fixture and method for machining and positioning oblique holes in the sidewalls of measuring pipes. The fixture includes a clamping platform and two sets of built-in cooling components. The clamping platform is equipped with a support assembly and a clamping and positioning mechanism. The clamping and positioning mechanism includes fixed and movable clamping components symmetrically arranged on the clamping platform. Each of the fixed and movable clamping components has a centering component at one end facing the other. The two centering components are respectively used to abut against the two ends of the measuring pipe section to achieve self-aligning clamping and positioning of the measuring pipe section. The two sets of built-in cooling components are symmetrically arranged on the two inner sidewalls of the measuring pipe section to be drilled. Each built-in cooling component has a cooling channel inside, which is connected to an inlet pipe and an outlet pipe, respectively. The inlet and outlet pipes are used to circulate cooling medium into the built-in cooling components. The beneficial effects of this invention are: it solves the technical problems of poor positioning accuracy and difficulty in controlling thermal deformation of the pipe body in existing oblique hole machining processes.

The utility model relates to the related technical field of wind tower flanges, in particular to a two-in-one wind tower flange with a locking structure, which comprises a flange body, a built-in flange, a penetrating bolt column and a locking component, the built-in flange is mounted at the locking position in the flange body, the penetrating bolt column penetrates through a fixing hole in the built-in flange, and the locking component is mounted in the flange body. A built-in flange and a penetrating bolt column are arranged at the fastening position of the locking assembly, and the inner locking assembly is installed on the flange body; according to the external lock assembly, the opposite penetrating ring at the bottom end of the penetrating column penetrates through the interior of the lock catch hole and penetrates through the interior of the flange body, the interior of the lock catch flange ring and the interior of the built-in flange at the same time, the opposite penetrating ring is collided and deformed to be filled into the lock catch hole, and therefore sealing filling and wind tower flange overall lock catch installation are facilitated for the flange body, the lock catch flange ring and the built-in flange lock catch gaps; field welding is carried out after locking, the locking flange ring and the built-in flange can be directly welded, and the welding installation deviation of the wind tower flange is prevented.

A backlight plate for side corner installation of an LED lamp comprises a support shell, a sinking groove is formed in a placement face on one side of the support shell, a light guide plate is installed in the sinking groove, a corner edge protruding part vertically protruding out of the edge of an unfilled corner is arranged on one side of the unfilled corner of the sinking groove, a side edge lamp groove is formed in the placement face, and a light-emitting assembly is arranged in the side edge lamp groove. The LED lamp beads are arranged in the side edge lamp grooves in a sinking mode, the LED lamp beads are right opposite to the corner edge side walls of the corner edge protruding parts, light emitted by the LED lamp beads is diffused through the corner edge protruding parts and is transmitted in the direction of the sinking grooves, the side walls of the first notch edges of the light guide plate are right opposite to the corner edge side walls, and the light emitted by the LED lamp beads is guided to the surface of the light guide plate along the side walls of the first notch edges. According to the utility model, the single LED lamp bead diffuses and transmits through the angle edge protruding part, the light guide plate is used for realizing plane light guide of light rays, and the transmitting film is used for further reflecting the transmitted light, so that the light utilization rate is improved, and the brightness and the uniformity of the backlight plate are improved.

The sealing mechanism of the steel fireproof door comprises a door frame and a steel door, an installation groove is formed in the inner side of the door frame, sliding grooves are formed in the two sides of the middle of the two ends of the installation groove, sliding blocks are connected into the two sliding grooves in the same end in a sliding mode, and a same side plate is fixedly connected between the two sliding blocks in the same end. Vertical plates are fixedly connected to the two sides of the middles of the sides, away from each other, of the two side plates, and an inclined hole is formed in each vertical plate. According to the steel door, along with rotation of the two motors, the first rubber strip, the second rubber strip and the third rubber strip are all inserted into the grooves of the steel door and extruded, gaps around the steel door are effectively reduced, meanwhile, the first rubber strip, the second rubber strip and the third rubber strip are protected in cooperation with heat insulation rock wool strips, and the service life of the steel door is prolonged. And when a fire disaster occurs, the steel door is heated to deform, so that smoke generated by the fire disaster does not penetrate through the steel door.

The invention relates to the technical field of punching equipment, in particular to a base machining and producing device. The workbench is arranged on the ground. The shell punching device is arranged above the workbench and connected with the top face of the workbench. The punching cooling device is arranged on the shell punching device and connected with the shell punching device. The shell clamping device is arranged on the shell punching device and located between the workbench and the punching cooling device, and the shell clamping device is connected with the shell punching device. The controller is arranged on the side of the workbench and fixedly connected with the side face of the workbench, and the controller is further electrically connected with the shell punching device and the shell clamping device. The technical effects that when the shell is punched, the equipment can automatically clean scraps generated during punching, cooling liquid can be sprayed to the surface of the equipment and the surface of the shell, and the equipment and the shell are prevented from being damaged are achieved.

The invention belongs to the field of galvanometer laser welding, and particularly relates to double-head quasi-synchronous laser welding equipment which comprises a rack and a displacement mechanism mounted at the top, and the displacement mechanism is used for adjusting different positions to weld workpieces; the welding mechanism is mounted on the displacement mechanism and is used for welding the workpiece; the first treatment mechanism is installed on the welding mechanism and used for blocking chippings generated during welding and meanwhile conducting cooling treatment on the edge and the front face of the galvanometer body; through air seal protection and rotary heat dissipation of the first processing mechanism, welding scraps and dust are intercepted, accumulated heat on the outer edge of the galvanometer body is rapidly guided out, and impurity attachment and lens thermal deformation are avoided; and the second treatment mechanism realizes removal of harmful substances and impact type cooling of the bottom surface of the galvanometer through purification, refrigeration and recovery of hot flue gas in a closed loop, so that the environment-friendly working environment is guaranteed, a heat dissipation system is formed by the second treatment mechanism and the first treatment mechanism, the thermal lens effect is effectively inhibited, and the service cycle of the galvanometer and core components is remarkably prolonged.

The invention relates to the technical field of welding devices, and particularly discloses a fresh air pipeline welding device for old community reconstruction, which comprises a placing base, a height adjusting device is fixedly connected to the top of the placing base, and first sliding sleeves are fixedly connected to the parts, positioned on two sides of the height adjusting device, of the top of the placing base; the fresh air pipeline welding device comprises a U-shaped connecting support, a first sliding sleeve is fixedly connected to the top of the U-shaped connecting support, a first sliding rod is slidably connected to the inner wall of the first sliding sleeve, an angle adjusting device is fixedly connected to the top of the U-shaped connecting support, a welding gun is fixedly connected to one side of the angle adjusting device, and clamping and fixing devices are fixedly connected to the top and the bottom of the U-shaped connecting support. The height adjusting device is arranged, so that fresh air pipelines of any height can be welded, the clamping and fixing device is arranged, so that two sets of pipelines needing to be welded can be clamped and fixed at the same time, and the problem of welding deviation caused by sliding due to unstable clamping is avoided.