52results about How to "Prevent thermal deformation" patented technology

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.

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 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 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.

The utility model provides a kind of for coke oven tail gas combustion device, belongs to tail gas combustion technical field, comprising: combustion chamber, raw gas import, combustion air import, ignition needle, explosion door, first baffle and smoke outlet;Combustion chamber includes inner shell and outer shell, combustion air passage is equipped between inner shell and outer shell, inner shell is equipped with multiple air holes, inner shell is connected with raw gas import, combustion air passage is connected with combustion air import;Ignition needle is embedded in inner shell inside one end, and ignition needle is located above raw gas import;Explosion door is rotatably connected with combustion chamber, and covers in the opening of combustion chamber;The device passes through raw gas first by ignition needle and is ignited to occur first combustion, then fully mixes with combustion air in combustion chamber interior and occurs secondary combustion, to improve combustion efficiency, and after the gas after combustion is guided and shunted, then is discharged through smoke outlet, avoid airflow direct impact smoke outlet, reduce the risk of turbulence generation and smoke outlet blockage.

The utility model discloses a stainless steel strip polishing device capable of enhancing the surface heat dissipation efficiency, and relates to the technical field of stainless steel strip polishing. The device comprises an outer box, an inner box, a mounting frame, a first motor and a second motor, the inner box is arranged in the outer box, a stainless steel belt is conveyed in the inner box, the mounting frame is arranged in the inner box, and two sets of symmetrically-distributed transmission rollers are rotationally mounted in the mounting frame; the outer wall of the transmission roller is sleeved with a polishing belt attached to the two ends of the stainless steel belt, cooling water higher than the stainless steel belt is arranged in the inner box, stroke openings higher than the upper end of the outer box are formed in the two ends of the inner box, and the stainless steel belt penetrates through the stroke openings in a sliding mode. The outer wall of the linkage chain wheel is sleeved with a chain. The stainless steel strip polishing device is immersed in cooling water to polish a stainless steel strip, so that the problem of low cooling efficiency caused by insufficient heat carrying capacity of air is solved.

The utility model belongs to calcination kiln body structure field discloses a kind of furnace bridge structure and calcination kiln with water cooling, this scheme is by being arranged together with water cooling pipe and steel pipe, and then the heat of steel rail can be transferred to water cooling pipe by heat transfer, the high temperature of steel rail is endothermic by the water flowing in water cooling pipe, to reduce the influence of high temperature on steel rail, avoid the thermal deformation of steel pipe, improve the stability when steel rail is used. By the setting of vertical section, the arch foot of furnace arch can not only act on steel rail with vertical pressure, but also transfer horizontal pressure to vertical section by abutting with vertical section, so that kiln foundation will not directly bear the pressure of furnace arch, and the kiln foundation is protected.

This utility model discloses a rapid slicing device for frozen animal tissues in the field of biological experimental technology, comprising: a blade holder with a detachable and fixed slicing blade at one end; a sample head located on the side of the slicing blade away from the blade holder, used to hold the frozen tissue sample to be sliced, and capable of adjusting the spatial position of the frozen tissue sample to cooperate with the slicing blade for layer-by-layer cutting; and a conveying component embedded in the blade holder, the conveying path of the conveying component extending away from the slicing blade, the conveying component being used to receive frozen slices sliding off the slicing blade and drive the frozen slices to move intermittently along the conveying path. The intermittent movement of the conveying component of this device realizes automatic separation and orderly temporary storage of slices, transforming the traditional slicing and picking operation into a slicing and temporary storage operation, realizing a new mode of continuous slicing followed by centralized picking, greatly reducing the number of times the anti-roll plate is repeatedly opened and closed, and significantly improving the efficiency of batch slicing.

The application discloses a trachea cannula production cutting device, which comprises a workbench, a cutting mechanism and a polishing mechanism arranged on the workbench, the cutting mechanism comprises a support frame, a hydraulic cylinder, a hydraulic push rod, a cutting knife and a bidirectional screw rod, the support frame is installed on the workbench, the hydraulic cylinder is installed on the support frame, the hydraulic cylinder output end is connected with the hydraulic push rod, the hydraulic push rod is connected with the cutting knife, the workbench surface is provided with a mounting groove, the bidirectional screw rod is arranged in the mounting groove, the polishing mechanism comprises a sliding rail, a sliding seat, a connecting seat, a limiting sleeve, a universal ball and a polishing head, the sliding rail is installed on both sides of the workbench, the sliding seat is connected with the sliding rail, the connecting seat is connected with the sliding seat, the connecting seat top is connected with the limiting sleeve bottom, the universal ball is embedded in the limiting sleeve, and the universal ball one end is connected with the polishing head. The application can not only ensure that the cutting is completed at one time and the uncut phenomenon is avoided, improve the efficiency, but also can polish the burrs generated during the pipe cutting, and ensure the use safety.

The invention discloses a large-current photovoltaic junction box structure, and belongs to the field of photovoltaic junction box structure design. According to the technical scheme, a main heat source heat dissipation component, namely a pin of a diode, is welded to the lower portion of tin of a copper terminal, a bus bar is welded to the tin of the copper terminal, and a large amount of heat on the pin of the diode is taken away from a box body through the bus bar; the copper terminal is provided with a bus bar through hole, so that heat at two ends of the diode can be quickly led away; the copper terminal bend is arranged on the copper terminal, so that the heat dissipation area of the copper terminal and the axial surface of the diode is increased, heat exchange is enhanced, and heat of a diode heat source is rapidly led away. A base protrusion is arranged below the base, the heat dissipation area of the copper terminal and the diode axial surface is increased, heat exchange is enhanced, heat of a diode heat source is rapidly taken away, and the structural strength of the side edge of the base is enhanced. Under the conditions of small width and small size, the heat dissipation effect of the box body can be effectively enhanced, large bypass protection current can be realized, the temperature of the junction box during bypass protection is reduced, and the service life of a product is prolonged.

The application relates to the technical field of fireplaces, in particular to a high-efficiency heat-dissipation fireplace. The fireplace comprises a furnace body, the furnace body comprises a back plate, a side plate, a bottom plate, a front plate, a top plate and a combustion inner cavity, the top plate is composed of a plurality of convex units, and the plurality of convex units are connected in a wave shape. The top plate is arranged in a wave shape, the periodic fluctuation can increase the effective height of the top plate in the thickness direction, the geometric rigidity is enhanced, the top plate is prevented from being deformed due to heat, and the surface area of the wave-shaped top plate is increased, so that the heat-dissipation area of the top plate is effectively increased.

The application relates to the technical field of valves, in particular to a high-temperature material flow regulating device and a control method thereof, which comprises a device body, a spring hanger fixed on the device body, an inlet and return water system, a control system, a monitoring device and a connecting pipe fixed on a discharge port of the device body. The device is aimed at the problems of poor linearity of traditional gate valves and flap valves, insufficient precision of manual regulation and open-loop control, realizes linear regulation of high-temperature material flow through the curved surface fitting design of a valve head and a valve seat, completely solves the disadvantages of small opening sensitivity and large opening sluggishness, accurately adapts to trace regulation requirements, relies on the monitoring device to collect material level and temperature signals in real time, constructs a closed-loop control through a PLC control system, automatically drives an electric actuator to adjust the position of a valve rod, does not need manual intervention, avoids human judgment errors, eliminates high-temperature scene operation safety hazards, greatly improves flow control precision and stability, and solves the problem of instability of a traditional control loop.

The utility model discloses a hot air duct corner type sealing isolation door which comprises an air duct, a door frame is arranged in the air duct and located in one end of an air outlet of the air duct, the periphery of the door frame and the periphery of the air duct are connected in a sealed mode, a door plate mechanism is arranged in the door frame and comprises an inner container and a shell, and an expansion joint is arranged at the joint of the inner container and the shell. The upper edge of the door plate mechanism is hinged to the door frame, and sealing strips are arranged at the connecting positions of the door plate mechanism and the four faces of the door frame. According to the utility model, the door plate mechanism is connected with the connecting rod, the driven arm, the driving arm, the bearing seat, the rotating rod and the cylinder, so that the opening of the isolation door is mechanically and automatically turned over, and when the door plate is closed or opened, friction between the door plate and the sealing strip is avoided, so that the sealing strip is difficult to damage; the expansion joint is arranged between the inner container and the shell of the door plate mechanism, thermal deformation of the door plate is avoided, and the sealing strip is arranged to guarantee the sealing performance of the isolation door.

Provided are a Faraday device and an ion implantation device. The Faraday device has excellent cooling capacity and can accurately measure a charged particle beam. The Faraday device (7, 8, 9, 9a) includes a mask (10) having an opening (S) through which an ion beam (B) passes; a front plate (16) abutting the mask (10) and having a refrigerant flow path (R) through which a refrigerant flows; a Faraday cup (14) disposed downstream of the front plate (16); and a back plate (12) disposed downstream of the Faraday cup (14) and having a refrigerant flow path (R) through which a refrigerant flows. The front plate (16) is disposed at a position that is not visible from the ion beam (1) that is irradiated toward the mask (10).

A laser welding system and method, an electronic device, a medium, and a computer program product are provided. The laser welding system comprises a spot welding device, the spot welding device comprises a camera, a servo mechanism, a welding flux supply machine and a laser, the welding flux supply machine and the laser are mechanically connected with the servo mechanism, the camera shoots a to-be-welded workpiece so as to determine the current position of the to-be-welded workpiece, and the offset is determined based on the current position and a preset target position; the servo mechanism controls the solder supply machine and the laser to move based on the offset so as to be aligned with at least one target point position on the workpiece to be welded; the solder supply machine supplies a preset dose of solder to each target point location in the at least one target point location; the laser aims at each target point position in the at least one target point position to apply laser; the servo mechanism is configured to adjust the distance between the laser device and a first target point location in the at least one target point location when the laser device applies laser to the first target point location so as to change the range of the laser spot at the first target point location.

The present application belongs to the technical field of coiled material packaging, and particularly relates to a coiled product automatic packaging equipment based on multi-station continuous conveying and a control method thereof. The present application provides a coiled product automatic packaging equipment based on multi-station continuous conveying and a control method thereof, which is characterized in that: 1. By synchronously performing the centering process and the coiled material film wrapping process, the situation that the residual film at both ends of the coiled material is uneven after the film wrapping process is avoided; 2. In the end sealing process, the cold sealing technology is used to replace the high-temperature film sealing technology, thereby eliminating the risk of deformation or performance damage of the heat-sensitive coiled material under high temperature.

The invention belongs to the technical field of polishing machines, and particularly discloses a curved optical glass polishing machine which comprises a cabinet, a splash-proof bin is arranged above the cabinet, a profiling suction and abutting mechanism is arranged in the splash-proof bin, and a PLC is fixedly installed on the outer wall of one side of the cabinet. The rear end of the cabinet is connected with a polishing mechanism through an arranged storage lifting mechanism, a suction mechanism is arranged on one side of the interior of the splash-proof bin in a communicating mode, the profiling suction abutting mechanism further comprises a profiling disc table, the outer edge of the profiling disc table is bent downwards, and a wear-resisting flexible particle pad is machined on the outer surface of the profiling disc table. According to the curved glass polishing device, dynamic balance fixing can be achieved, the problems of displacement, scratches and damage caused by unstable fixing in the curved glass polishing process are solved, and high-precision, self-adaptive and full-automatic polishing is achieved.

The utility model relates to the field of powder metallurgy discloses a kind of powder metallurgy lock cylinder precision assembly integrated forming die, including movable template, the upper surface axial center of movable template is equipped with powder inlet, the upper surface of movable template is fixedly installed with top die bin around, the lower surface of movable template is detachably connected with movable mould, the lower surface of movable mould is detachably connected with fixed mould, the lower surface of fixed mould is provided with cooling assembly, the left and right sides of cooling assembly are both provided with auxiliary assembly, cooling assembly includes cooling bin, the front surface of cooling bin is fixedly installed with cold strip. In the utility model, through the cooperation of cooling bin, heat absorption column, cold strip and other parts in equipment, realize "heat absorption-heat dissipation" two-stage path, the temperature of fixed mould temperature demoulding interval is rapidly cooled, and the finished product time is greatly shortened, and the stability of the size accuracy of forming piece is improved.

The invention relates to the technical field of polishing devices, in particular to an aluminum profile machining polishing device which comprises a supporting mechanism and a polishing mechanism, and the supporting mechanism comprises a base, a hollow seat, a supporting part, a driving part and a U-shaped frame; the hollow seat is arranged on the base; the U-shaped frame is arranged on the hollow seat; the supporting part is composed of two symmetrically-arranged supporting frames and a supporting roller. The supporting rollers are rotationally arranged on the inner sides of the supporting frames. The driving part is arranged on the U-shaped frame; the grinding mechanism comprises a butt joint pipe, a telescopic hose, a pump body, a box body, a partition plate, a pipeline part a and a pipeline part b; the telescopic hose is connected with the connecting pipes at the two ends. The pump body is connected with the telescopic hose; the partition plate is arranged in the box body and divides the box body into a cavity a and a cavity b; the pump body is communicated with the box body through a pipeline part a; and the telescopic hose is communicated with the box body through the pipeline part b. The inner wall of the thin and long aluminum pipe can be evenly ground without dead corners, and the problems that tool loss is caused and depth cannot be achieved due to tool size limitation are solved due to the fact that no solid grinding head is arranged.

This invention relates to the field of rivet processing technology, and specifically discloses a stamping die for rivet processing, including a support base. A support plate is fixedly connected to the top of the support base via a bracket. A first motor is fixedly connected to the top of the support plate via a motor bracket. The drive shaft of the first motor passes through the support plate and is fixedly connected to the fixed end of a stamping cylinder via a bracket. An upper die is fixedly connected to the movable end of the stamping cylinder. A cooling and cleaning device is sleeved on the movable end of the stamping cylinder and fixedly connected to it. The cooling and cleaning device is connected to the oil outlet of a first oil pump via a hose. The oil inlet of the first oil pump is connected to a first oil tank via a pipe. The bottom of the first oil tank is fixedly connected to the top of the support plate. This stamping die for rivet processing solves the current problem of insufficient cooling of the upper and lower die tables and the inability to clean debris during rivet stamping.

This utility model relates to a cooling mechanism for the slide rail of a gantry machine tool, including a slide saddle, a slide ram, and a cooling assembly. The slide ram moves up and down within the inner cavity of the slide saddle via a drive mechanism, and the guide rail surface of the slide ram contacts the inner cavity of the slide saddle. The cooling assembly includes cooling plates for cooling the guide rails at the four corners of the slide saddle and a cooling machine for supplying coolant to the cooling plates through a pipe assembly. This utility model relates to the field of gantry machine tool technology. This gantry machine tool slide rail cooling mechanism has a cooling system fixed on both sides of the slide saddle. The cooling system consists of cooling plates, pipes, connectors, etc. The entire cooling system is supplied with coolant by the cooling machine. The coolant circulates through pipes into the circulation groove of the cooling plates and finally flows back to the cooling machine, forming a circulating cooling system for the slide saddle and slide ram guide rails. This reduces the thermal deformation of the slide saddle and slide ram, thereby improving the machining accuracy of the machine tool.

The utility model discloses a post-drying device for a PET substrate printed circuit. The post-drying device comprises an electric conveyor belt and a lifting mechanism, a drying box is fixedly connected to the middle of the upper end of the electric conveying belt, and infrared heating pipes which are evenly distributed are fixedly connected to the interior of the drying box; the lifting mechanism comprises lifting cabinets, sliding tables, lifting tables and guide rails, the lifting cabinets are placed on the left side and the right side of the electric conveying belt, the guide rails which are symmetrically distributed left and right are fixedly connected to the inner walls of the front side and the rear side of each lifting cabinet, the sliding tables are slidably connected to the exteriors of the guide rails, and the lifting tables are fixedly connected between the upper ends of the sliding tables located on the same lifting cabinet; positioning frames symmetrically distributed front and back are arranged on the upper surfaces of the lifting tables correspondingly, and transfer boxes are placed on the upper surfaces of the lifting tables correspondingly. According to the drying equipment for the PET substrate printed circuit, through automatic feeding and discharging, the workload is reduced, meanwhile, through an infrared drying mode, energy is saved, and thermal deformation of the substrate is avoided.

This invention provides a purging device and semiconductor deposition equipment, overcoming the shortcomings of uneven purging and inability to form a complete gas curtain in the transport channel of existing MOCVD equipment. The device sets the first and second purging channels at specific angles, so that the two airflows converge in the chamber in front of the valve plate and are located inside the chamber, thereby forming a fully enclosed protective gas curtain from top to bottom without dead angles. This effectively blocks the diffusion of reactive gases to the valve plate side, improves the dustproof and heat protection effect of the valve plate, and enhances the operational stability and safety of the equipment.

An airtight cooling transition pipe assembly facilitating safe insertion and extraction of a spray gun at a blast-furnace tuyere is characterized in that one side of a three-way transition pipe is connected with a blowdown pipe, an inner cavity of the three-way transition pipe is a coal injection gun channel, an inner cavity of the blowdown pipe is a high-pressure nitrogen channel, and the end, away from the three-way transition pipe, of the blowdown pipe is connected with a first ball valve through a flange; the other end of the first ball valve is connected with a second ball valve through a flange, and a quick connector is installed at the outer end of the second ball valve. The assembly has the advantages that high-pressure nitrogen is reversely blown into the blast-furnace tuyere through the gun barrel, meanwhile, a gap between the gun barrel and the gun can be sealed when the gun is pulled out or inserted, blast furnace hot air and hot coke breeze are prevented from being sprayed out of the gap, meanwhile, a cold air wall formed by the nitrogen can cool the gun barrel, and the blast furnace tuyere is cooled through the cold air wall. The gun barrel is prevented from being heated to deform and expand in the plugging and unplugging process, the safety of the operation of plugging and unplugging the coal injection gun by a blast furnace operator is effectively improved, and the goal of safety, greenness, high efficiency and low consumption in the blast furnace ironmaking process is promoted to be achieved.

This application relates to the technical field of semiconductor processing equipment components, specifically disclosing a special metal chamfering wheel for semiconductor silicon carbide wafers and its processing technology. The special metal chamfering wheel for semiconductor silicon carbide wafers is mainly made of the following raw materials in weight percentages: 7-8% micron-sized diamond, 23-27% copper-tin powder, 60-65% cobalt powder, 2-3% silver powder, and 2-3% silicon nitride powder. This special metal chamfering wheel, through the interaction of the raw materials, has advantages such as high hardness, good thermal conductivity, excellent wear resistance, and high stability during the grinding process, outperforming traditional chamfering wheels and making it suitable for processing silicon carbide wafers.