185 results about "Head cooling" patented technology

The invention relates to a drive device (100) for a motor vehicle (105), comprising a machine housing section (300) for accommodating an electric machine (115) and a transmission housing section (305) for accommodating a transmission (130), wherein the machine housing section (300) has a first intake point (310) configured to be fluidically connected to a first intake line (225) of a first pump (200) of a hydraulic system (135) for cooling and / or lubricating thermal consumers, wherein the transmission housing section (305) has a second intake point (400) configured to be fluidically connected to a second intake line (230) of the first pump (200) or a further pump of the hydraulic system (135), wherein a winding head cooling system (320) of the electric machine (115) is fluidically connected to a transmission chamber (335) of the transmission housing section (305),wherein a coolant and / or lubricant contained in the transmission chamber (335) can be sucked off at least indirectly to the first intake point (310) and via the second intake point (400) via at least one bypass (350) in the engine housing section (300). Furthermore, the invention relates to a motor vehicle (105) with such a drive device (100).

The intelligent cutting equipment comprises a supporting frame, a pipe conveying mechanism, a pipe rotating mechanism and a cutting mechanism, the side face of the cutting mechanism is provided with a flow adjusting mechanism and a self-adaptive spray head, the pipe conveying mechanism comprises a sliding table, a lead screw and a first motor, the sliding table is slidably connected with the supporting frame, and the lead screw penetrates through the sliding table to be in threaded connection with the sliding table; the pipe rotating mechanism comprises a rotating disc, a chuck and a second motor, the rotating disc is rotationally connected with the supporting frame, the second motor is rotationally connected with the rotating disc through the synchronous belt and the synchronous wheel, the chuck is fixedly installed on the rotating disc, and the cutting mechanism comprises a laser cutting head and a telescopic air cylinder. The cutting mechanism is installed on the top of the supporting frame, and a cooling flow channel is formed in the side wall of the laser cutting head. The problem that in the prior art, a laser cutting head cooling refrigerant cannot be adjusted in a self-adaptive mode according to the cutting head, so that resources are wasted or the cooling effect is poor is solved.

The invention relates to an air pressure forming die and method for hot-state metal pipe parts. The air pressure forming die comprises an upper die system, a lower die system, a sealing inflation system and a pressure head cooling system. The mold is opened and closed through longitudinal displacement of the upper mold system on the lower mold system, and an air pressure forming space is formed. And the pressure head cooling system provides rapid heat dissipation for the end part of the pipe blank, so that fixing and pressing are ensured. The sealed inflation system achieves high-pressure segmented pressurization inflation through a jacking type butt joint disc and a sealed punch. Lateral deviation is prevented through the upper die guide plate and the lower die guide plate in the whole forming process, and finally efficient and accurate forming of the part is completed through self-cooling. Through innovative design and fine control, the forming quality is improved, the mold stability is enhanced, the production efficiency is improved, and the cooling effect is optimized.

Provided are a liquid cooling system of a charging gun and a charging gun. The liquid cooling system includes a head cooling assembly, a tail cooling assembly, a liquid input pipe and a liquid output pipe. The head cooling assembly includes a cooling pipe assembly. The cooling pipe assembly is connected to a charging terminal of the charging gun. The tail cooling assembly includes a connection box and a first conductive member. One end of the first conductive member is disposed in the connection box. A cable connected to the charging terminal is connected to the first conductive member in the connection box. Another end of the first conductive member is connected to an external power supply. The liquid input pipe extends through the connection box and communicates with the inlet of the cooling pipe assembly. The liquid output pipe communicates with the outlet of the cooling pipe assembly.

The utility model relates to the technical field of friction stir welding equipment, in particular to a double-head cooling stirring head device. The double-head cooling stirring head device comprises a cutter handle, a cooling assembly and a double-head stirring head, a mounting blind hole matched with the double-head stirring head is formed in one end of the cutter handle, the double-head stirring head comprises a limiting base and stirring columns coaxially arranged at the two ends of the limiting base, friction heads are arranged at the ends of the stirring columns, and the friction heads are arranged on the limiting base. Any stirring column of the double-end stirring head is inserted into the mounting blind hole and locked and fixed through a locking structure arranged at one end of the cutter handle, and the cooling assembly is used for cooling the double-end stirring head. The device has the advantages of simple and reasonable structural design and easiness in installation and maintenance; the problem that the temperature of a traditional stirring head rises in the stirring process can be effectively solved, and the product quality and the process stability are improved; meanwhile, the use efficiency of the double-head stirring head is improved, and the purposes of energy conservation and environmental protection are achieved.

The invention discloses a stirring friction deposition stirring head cooling structure. The stirring friction deposition stirring head cooling structure comprises a solid heat transfer medium and a cooling assembly. The solid heat transfer medium is a flowing solid heat transfer medium or a non-flowing solid heat transfer medium; when the solid heat transfer medium is a flowing solid heat transfer medium, the flowing solid heat transfer medium flows through the peripheral surface of the stirring head to absorb heat of the stirring head; when the solid heat transfer medium is a non-flowing solid heat transfer medium, the stirring head is detachably and rotatably sleeved and fixed in the non-flowing solid heat transfer medium, so that the non-flowing solid heat transfer medium absorbs heat of the stirring head; the cooling assembly is used for cooling the solid heat transfer medium to take away heat absorbed by the solid heat transfer medium from the stirring head. The stirring head is free of liquid leakage and long in service life, the structural strength of the stirring head cannot be reduced, and the stirring head is suitable for a hollow stirring friction deposition stirring head and a stirring head for non-hollow friction stirring welding.

The invention provides a multi-nozzle micro-mixing annular combustion chamber suitable for high-hydrogen-content fuel. The multi-nozzle micro-mixing annular combustion chamber is wrapped by a cartridge receiver, and a combustion area is defined by a combustion chamber head, an outer barrel and an inner barrel. A micro-mixing nozzle and a head cooling hole are arranged at the head of the combustion chamber; and an air film cooling hole and a mixing hole are formed in the outer barrel and the inner barrel of the combustion chamber. Air enters a combustion area through the micro-mixing nozzle, the head cooling hole, the air film cooling hole and the mixing hole, fuel is jointly supplied through a main fuel channel and an auxiliary fuel channel of the micro-mixing nozzle, and therefore the proportion of diffusion combustion and premixed combustion can be controlled. By the adoption of the multiple micro-mixing nozzles and the multiple micro-mixing units, fuel and air are highly graded and enter a combustion area in a high-speed jet flow mode to be partially premixed and combusted, the size of a backflow area in the combustion chamber is limited through cooling gas and mixed gas, and therefore the retention time of combustion products is shortened.

A head cooling device is configured to couple internally within a headwear element, and designed to locate a cooling pack in relative proximity to a user's head when the headwear is worn. The head cooling device is configured to be directly affixed within the headwear or is removable in nature. The head cooling device is configured to permit the interchanging of cooling packs. The head cooling device is a compact reusable device designed as a health and safety feature to be used to help regulate the body temperature of a user when in the heat.

The invention discloses a milling head cooling system, which belongs to the technical field of milling head cooling and comprises a shell, a driving shaft and a driven shaft are arranged in the shell, the driven shaft is perpendicular to the driving shaft, a first spiral bevel gear is arranged at one end of the driving shaft, the driven shaft is provided with a second spiral bevel gear meshed with the first spiral bevel gear, and an oil tank is arranged at the bottom of the shell. The bottom of the shell communicates with the oil tank. The oil tank is provided with a driving mechanism used for driving oil to circulate, an oil inlet of the driving mechanism is connected with an oil outlet of the oil tank through a hose, and an oil outlet of the driving mechanism is connected with a reversing valve through a hose. A support is further arranged in the shell and connected with the shell through a bolt, the support is arranged outside the driving shaft in a sleeving mode, a gap exists between the support and the driving shaft, the support is provided with an annular groove, a first water jacket is arranged in the annular groove, and the first water jacket is connected with the reversing valve through a hose. And a cooling nozzle is arranged outside the shell. The problem of heat dissipation of the milling head is solved.

The utility model discloses a polishing and cleaning device for metal fitting processing, which belongs to the technical field of metal fitting processing and comprises a bottom plate, a first mounting plate is assembled on one side of the upper end face of the bottom plate, a group of limiting components is assembled on one side of the first mounting plate, and a group of cleaning components is further assembled on one side of the first mounting plate. The polishing and cleaning device for metal fitting machining has the advantages that clamping and limiting are fast, the polishing and cleaning device is suitable for fittings of different sizes, cleaning and cooling are achieved, and the overall machining efficiency is improved; according to the device, a first reciprocating motor and a second reciprocating motor are controlled to drive a spraying head to move within the stroke range of a threaded lead screw, so that the spraying head cools and cleans the tubular fitting in the polishing process, and the working efficiency is improved. Therefore, the machining quality of the workpiece is improved.

The invention provides a hypersonic velocity leading edge combined cooling structure, system and method capable of coping with space-time non-uniform heat flow, and is mainly used for solving the problems that in the existing active thermal protection technology, head cooling insufficiency and downstream cooling excess are likely to occur in space, the cooling effect is difficult to dynamically adjust in time, cooling insufficiency or excess in some time periods is caused, and the cooling effect is poor. And the whole porous medium structure is inconvenient to check and maintain. The invention discloses a hypersonic velocity leading edge combined cooling structure capable of coping with space-time non-uniform heat flow. The hypersonic velocity leading edge combined cooling structure comprises a diverging part, a structure part, a rear cover plate and a shunting core, through discrete arrangement of the diverging parts and setting of different porosities for the diverging parts at different positions, the porosities of the N diverging parts are sequentially reduced from the head part to the tail part, and the larger the porosities are, the more the coolant distribution amount is, so that the technical problems of insufficient head cooling and excessive downstream cooling easily occurring in space are solved.

The utility model relates to a device for cooling, dedusting and waste heat utilization of a kiln head of a rotary kiln. The device comprises a kiln head cooling structure, a deduster, a dedusting fan, a chimney, a combustion fan and a regulating valve, the kiln head cooling structure, the dust remover, the dust removal fan and the chimney are sequentially connected through a pipeline; an outlet of the combustion fan is connected with the combustor through a pipeline, an inlet of the combustion fan is connected with the three-way pipe, one connector of the three-way pipe is connected with the adjusting valve and then communicated with the atmosphere, and the other connector of the three-way pipe is connected with an outlet of the dust removal fan. The method has the advantages that stable operation of the rotary kiln system under special conditions of failure, kiln drying, low yield and the like is guaranteed. Dust collection air is used for cooling a kiln head metal structure, one dust removal fan is used, kiln head cooling fans (generally two centrifugal fans) and corresponding pipelines are saved, the occupied area is saved, and the one-time investment and maintenance cost of equipment are reduced.

To efficiently cool a head of a hat wearer.SOLUTION: A hat 100 with a head cooling device includes a head cooling device 1 and a hat 2, and the head cooling device 1 includes a device body 11 and a fan 12, and the device main body 11 has an air intake portion 1122 which is an opening for taking in air into the fan 12, and an air discharge portion 113 for discharging the air taken in by the fan 12 from the air intake portion 1122 into the hat 2. The device body 11 includes an upper surface portion 111 constituting an upper surface and a lower surface portion 112 constituting a lower surface, and the air intake portion 1122 is formed on the lower surface portion 112, and the air discharge portion 113 is formed between one end of the upper surface portion 111 and one end of the lower surface portion 112.SELECTED DRAWING: Figure 5

The utility model relates to the technical field of medical instruments, and discloses a head cooling device which comprises a frame structure, a fixing structure is arranged on the outer side of the frame structure, and a cooling structure is arranged in the frame structure. A clamping piece is arranged at the joint of the frame structure and the fixing structure; a clamping rail is arranged at the connecting position of the frame structure and the cooling structure, the frame structure comprises a shell, a fixing groove is formed in the inner side of the shell, a clamping piece is clamped into a second clamping groove for primary fixing, and then a threaded clamping rod rotationally penetrates through the clamping piece till being in threaded connection with the shell. A threaded clamping rod is pressed outwards through deformation of a spring, the structural stability is further enhanced, the threaded clamping rod only needs to be rotated out of a clamping piece during disassembly, then the clamping piece and a bandage can be replaced, cooling gel is directly placed in a first clamping groove, the portability of the structure is enhanced, and the patient can move.

The utility model discloses a high-frequency quenching device for high-strength bolt production, which comprises a frame and a cooling tank positioned at the front end of the frame, a high-frequency quenching mechanism is arranged on the frame, and a reciprocating lifting mechanism is arranged in the cooling tank. The high-frequency quenching mechanism comprises a driving motor, a group of rotating shafts, two groups of chain gears, a group of transmission chains, a plurality of groups of bearing plates, a mounting plate, a high-frequency quenching machine and an electromagnetic heating coil. The continuous quenching device has the beneficial effects that a group of transmission chains drive a plurality of groups of bearing plates to rotate and are matched with a high-frequency quenching machine to drive an electromagnetic heating coil to carry out continuous quenching treatment on the head of the high-strength bolt, so that the quenching efficiency is improved; the quenched high-strength bolt falls into the bearing screen frame, the reciprocating lifting mechanism drives the bearing screen frame to do reciprocating lifting motion in the cooling tank, the head of the high-strength bolt is rapidly cooled, cooling of the head of the high-strength bolt is more uniform, after cooling is completed, the bearing screen frame is lifted to the top, and the high-strength bolt is conveniently taken out.

In order to provide an electric motor designed for operation with winding head cooling, which is optimized with respect to the frictional power loss caused by a cooling fluid entering the air gap between the rotor and the stator, an electric motor is proposed, comprising a rotor and a stator (10), the stator (10) comprising coil windings (12) made of electrical conductors, the coil windings (12) each form a winding head (14a, 14b) at an axial end (13) of the stator (10), the winding head (14a, 14b) comprising at least one first radially innermost layer of conductor sections (16a, 16b), the conductor sections (16a, 16b) of the first layer, in particular all, of each winding head (14a, 14b) having at least one bend in the same circumferential direction, and the first layer, in particular all of the conductor sections (16a, 16b) of each winding head (14a, 14b) having at least one second radially innermost layer of the conductor sections (16a, 16b). The conductor sections (16a, 16b) of the first layer are arranged such that the conductor sections (16a, 16b) have an inclined course with respect to the circumferential direction of the stator (10), the electric motor has a predetermined direction of rotation (R) for driving a shaft connected to the rotor, and wherein the direction of bending of the conductor sections (16a, 16b) of the first layer at the two axial ends (13) of the stator (10) coincides with the direction of rotation (R) of the electric motor.

The invention relates to the technical field of numerical control machine tool cooling, and discloses a cooling device for a numerical control machine tool and a cooling method thereof.The cooling device comprises a machine tool table, two sliding rails are fixedly connected to the top face of the machine tool table, a machine tool assembly is installed above the sliding rails, and a storage plate is arranged between the two sliding rails; a cooling box is fixedly connected into the machine tool table, and an input pipe and an output pipe are fixedly connected to the two sides of the top face of the cooling box correspondingly. A machine body cooling mechanism is arranged on the bottom face of the machine tool assembly, a tool bit cooling mechanism is arranged on the front side of the machine tool assembly, and a lubricating mechanism is arranged on the rear side of the machine tool assembly. According to the invention, the fault of hot melting and fusing of an internal circuit of the motor set caused by the fact that heat generated by long-time work of the motor set cannot be dissipated in time can be avoided, the pressure of heat generated by long-time work of the motor set is relieved, and the fault rate is reduced.

The invention relates to the technical field of charging guns, and particularly discloses a charging gun cooling system and a charging gun. In the charging gun cooling system, in a head cooling assembly, a cooling cavity is provided with a liquid inlet and a liquid outlet, a supporting frame accommodates the connecting end of a first terminal and the connecting end of a second terminal, and the cooling cavity is located between the first terminal and the second terminal; the liquid input pipe is communicated with the liquid inlet; the liquid output pipe is communicated with the liquid outlet; the liquid input pipe is connected with a first cable, the liquid output pipe is connected with a second cable, the first cable is connected with the connecting end of the first terminal, the second cable is connected with the connecting end of the second terminal, and the first cable and the second cable are connected with the first conductive part in the two connecting boxes respectively; the liquid input pipe and the liquid output pipe penetrate through the two connecting boxes respectively. According to the above arrangement, the temperature of the joint of the first cable and the first terminal connecting end, the temperature of the joint of the second cable and the second terminal connecting end and the temperature of the first conductive part can be reduced, and the charging efficiency is improved.

A liquid cooling system includes a head cooling assembly, a tail cooling assembly, a liquid input pipe and a liquid output pipe. The head cooling assembly includes a cooling pipe assembly. The cooling pipe assembly is connected to a charging terminal of the charging gun. The tail cooling assembly includes a connection box and a first conductive member. One end of the first conductive member is disposed in the connection box. A cable connected to the charging terminal is connected to the first conductive member in the connection box. Another end of the first conductive member is connected to an external power supply. The liquid input pipe extends through the connection box and communicates with the inlet of the cooling pipe assembly. The liquid output pipe communicates with the outlet of the cooling pipe assembly.

The invention discloses a spray cooling device for plastic molding, which comprises a spray pipe, a sliding pipe arranged on the inner wall of the spray pipe, a spray mechanism used for cooling and shaping a plastic product, and a cleaning mechanism used for brushing the inner wall of the spray pipe, and the protection mechanism is used for changing the spraying angle of the spraying mechanism, and the inner wall of the spraying pipe is in sliding connection with the side wall of the sliding pipe. The invention relates to the technical field of cooling spray heads. When a spraying head cools a plastic product and needs to be adjusted, through cooperation of a spraying pipe, a sliding pipe, the spraying head, an electric telescopic rotating rod, a fixing ring, a gear ring, a first gear, a micro motor, a rotating rod, a second gear, a belt and a protection plate, the liquid spraying angle of the spraying head can be adjusted, and meanwhile the side wall of the spraying head can be protected; garbage and dust are prevented from being directly attached to the surface of the spray header to cause blockage of the spray header and influence the cooling efficiency of equipment.

The utility model belongs to the technical field of UPS power supplies, and particularly relates to a UPS power supply convenient for heat dissipation, which comprises a UPS power supply body and a wiring panel, the wiring panel is arranged on the surface of the head part of the UPS power supply body, a head part air inlet channel is arranged at the joint of the head part of the UPS power supply body and the wiring panel, a tail part air inlet channel is arranged at the tail part of the UPS power supply body, and the head part air inlet channel is communicated with the wiring panel. A head cooling fan is installed at the position, corresponding to the head air inlet channel, of one end of the upper surface of the UPS body, and a tail cooling fan is installed at the position, corresponding to the tail air inlet channel, of the other end of the upper surface of the UPS body. The inner cavity of the UPS body is divided into a plurality of groups of battery pack mounting cavities through the flame-retardant partition plates, battery packs can be separated, the distance between the battery packs is increased, heat dissipation of the battery packs is facilitated, air is blown from bottom to top in the battery packs through the vent holes, the tail part can transversely blow air to the battery packs, and the heat dissipation efficiency of the battery packs is improved. The heat dissipation efficiency of the battery pack can be improved.

A personal cooling system for cooling a person includes a head cooling cap. The head cooling cap includes an inner layer defining a cavity configured to receive a head of the person, an outer layer, an intermediate layer positioned between the inner layer and the outer layer, and an inlet coupled to the outer layer. The inner layer is formed from fluid permeable materials. The intermediate layer defines a plurality of openings extending therethrough. The inner layer and the intermediate layer cooperatively define an inner potential space positioned between the inner layer and the intermediate layer. The intermediate layer and the outer layer cooperatively define an outer potential space positioned between the intermediate layer and the outer layer. The outer potential space is configured to receive a fluid and provide the fluid to inner potential space through the plurality of openings.

The present invention belongs to the technical field of medical cooling devices, and specifically discloses a high-efficiency medical head cooling device, including an equipment bin, a mounting groove is provided at the lower end of the equipment bin, a cooling mechanism is provided on the inner side of the mounting groove, a circulation mechanism is provided on the inner side of the equipment bin, a ventilating head is provided at the rear end of the equipment bin, a contact ring is fixedly connected to the outer side of the ventilating head at the rear end of the equipment bin, and a top belt is fixedly connected to the upper end of the equipment bin. The present invention can prevent cold wind from blowing directly onto the forehead of a child and prevent the child from being affected by the cold wind through the coordination between the cooling mechanism and the circulation mechanism, and can improve the effect of physical cooling by circulating air around the child's head, and prevent external foreign matter from affecting the efficiency of air cooling, and the whole device is relatively simple to operate.

The invention relates to the technical field of welding, in particular to welding equipment for mold production and machining. A cylinder I is fixedly connected to the welding head; a funnel is fixedly connected to the shell and communicates with the first cylinder through a hose. A cavity I is formed between the cylinder I and the welding head; the shell is fixedly connected with a mixer; the input end of the mixer is communicated with the cavity I through a hose; a second cylinder is fixedly connected to the outer side of the welding head and fixedly connected with the shell, and the second cylinder is fixedly connected with the first cylinder. A first spiral piece is fixedly connected to the inner side of the second cylinder and fixedly connected with the welding head. The mixer is arranged beside the welding head, gypsum is directly smeared after welding, station transferring is not needed, and efficiency is improved; high-temperature clear water obtained after welding head cooling and preheated gypsum powder are prepared into high-temperature gypsum slurry in a mixer, the high-temperature gypsum slurry is smeared to the repair welding position, uniform cooling is achieved, and the cracking risk is reduced; the design solves the problems of welding head heat dissipation and gypsum preheating at the same time, and the practical value is high.

The material of this product is synthetic resin and liquid latent heat material. The product is filled with liquid latent heat material (phase change material) and after cooling in a refrigerator, it is placed inside a hat or helmet and worn on the head to reduce body heat.

The utility model discloses alignment cutting equipment for copper profile production, which comprises a cutting table, the upper surface of the cutting table is fixedly connected with two fixing plates, a cutting frame is rotatably connected between the two fixing plates through a rotating shaft, the upper surface of the cutting frame is fixedly connected with a cooling cover, and the cooling cover is fixedly connected with the cutting table. A cooling cover is arranged on the upper surface of the cutting frame, a cooling nozzle is fixedly mounted on the inner wall of the cooling cover, a cutting blade is arranged in the cutting frame, two mounting openings are formed in the upper surface of the cutting table, a refrigerator is mounted in each mounting opening, and a water storage tank is arranged behind the cutting table. According to the device, two refrigerators are arranged on the cutting table, the cold faces of the refrigerators make contact with a copper profile during cutting, the copper profile is rapidly cooled by means of the good conduction effect of the copper profile, meanwhile, a cooling spray head is arranged in a cooling cover, a water pump on a water storage tank is matched with the cooling spray head, the cooling spray head cools a cutting blade, and the cutting efficiency is improved. And high-temperature deformation of the cutting position of the copper profile can be prevented.

The utility model relates to a transmission roller shaft head cooling mechanism for a toughening furnace, which comprises a passage arranged in a framework of a lower furnace body, a fan connected with an inlet of the passage and an air hole arranged at the upper part of the framework of the lower furnace body and communicated with the passage, and the position of the air hole corresponds to the position of a supporting roller shaft head and faces the supporting roller shaft head; the number of the passages is two, the passages are respectively arranged in the frameworks on the two sides of the lower furnace body corresponding to the supporting roller shaft head, the number of the fans is at least two, and one passage is provided with at least one fan. The fan, the passages in the framework and the air holes form a cooling channel, air generated by rotation of the fan is sprayed out of the air holes through the passages in the framework, and the positions of the air holes correspond to the positions of the shaft heads of the supporting rollers, so that airflow sprayed out of the air holes is blown to the positions of the shaft heads, the shaft heads can be cooled, high-temperature deformation of the shaft heads is avoided, and the service life of the supporting rollers is prolonged. And meanwhile, the airflow can blow away heat flow emitted from the top and bottom of the furnace body, and heat accumulation at the head of the supporting roller shaft is reduced.

The invention discloses a pediatric clinical cooling device, and relates to the technical field of pediatrics, the pediatric clinical cooling device comprises a bed board platform, four corners of the lower end of the bed board platform are provided with support legs, the upper surface of the front end of the bed board platform is provided with a headrest, and the upper surface of the headrest is provided with a rubber cushion pad. The head cooling mechanism is arranged on the front side of the bed board platform, and a body position cooling mechanism is arranged on the rear side of the bed board platform; the head cooling mechanism comprises a first adjusting rod, and a top box is arranged on the outer side of the first adjusting rod; the body position cooling mechanism comprises a cooling box. The problems that a cooling device and a pillow are combined and matched for use, only the neck of a patient can be cooled, the forehead of the patient often needs to be cooled under the conventional high-temperature condition, meanwhile, in a pediatric patient, high temperature is gradually transmitted, the whole body is infected, and the body part of the patient needs to be cooled at the moment are solved.

The utility model relates to the field of welding machines, in particular to an automatic cooling type ultrasonic welding machine. The welding machine comprises a machine base, an ultrasonic welding head and a welding head lifting air cylinder, a cylinder body of the welding head lifting air cylinder is fixed to the machine base, a piston rod of the welding head lifting air cylinder is connected to the ultrasonic welding head, a product front end positioning mechanism is installed on the machine base, a first air pipe and a second air pipe are connected to the machine base, and the first air pipe and the second air pipe are both connected to an air receiving mechanism. An electronic proportional valve is installed on an air path of the welding head lifting air cylinder. A product to be welded is positioned through the product front end positioning mechanism. And the gas receiving mechanism is matched with the two gas pipes to cool the ultrasonic welding head or spray nitrogen to the product, so that the product is prevented from being oxidized.