40results about How to "Low motion friction" patented technology

The invention relates to a comprehensive measuring device of static and dynamic rigidity of a ball screw. The comprehensive measuring device comprises a base plate, a linear feeding mechanism, a torque static and dynamic rigidity measuring mechanism, an axial static and dynamic rigidity measuring mechanism and a transverse static and dynamic rigidity measuring mechanism. The linear feeding mechanism comprises a servo motor, a torque sensor, a ball screw and a lead screw nut base. The torque static and dynamic rigidity measuring mechanism comprises two angle plates, two flanges, two circular gratings and two circular grating reading heads. The axial static and dynamic rigidity measuring mechanism comprises an electric cylinder, two connecting plates, two guiding rods, two springs and two tension-compression sensors. The transverse static and dynamic rigidity measuring mechanism comprises a linear guide rail, a sliding block, an electric cylinder, two pressure sensors, two universal balls, a first cardan, a connecting sleeve, a linear bearing, a sliding rod, an elastic box and a linear measuring block. The comprehensive measuring device can be used for torsional, axial and transverse static and dynamic rigidity measuring of the ball screw.

The invention relates to a device for measuring rotational inertia and friction moment of a ball screw. The device comprises a bottom plate, two linear guide rails, the ball screw, a torque sensor, a servo motor, a mobile platform and two friction moment measuring mechanisms. Each linear guide rail is provided with two sliding blocks. The two ends of the ball screw are supported by the part, located between the two linear guide rails, of the bottom plate in a rotary mode through a fixed supporting base and a floating supporting base. One end of the torque sensor is connected with the end, supported by the fixed supporting seat, of the ball screw through a coupler. An output shaft of the servo motor is connected with the torque sensor through a coupler. The two friction moment measuring mechanisms are arranged on the two sides of a screw nut base respectively. Each friction moment measuring mechanism comprises a cantilever. A connecting sleeve is arranged at the tail end of each cantilever. Each connecting sleeve is connected with a sliding bar through a vertical linear bearing. The other end of each sliding bar is connected with a pressure sensor. Each sliding bar is sleeved with a spring. The bottom of each pressure sensor is connected with a universal ball. The bottom of each universal ball makes contact with a linear slab which is parallel to the ball screw. The linear slabs are tightly connected to the bottom plate.

The invention relates to a single-degree-of-freedom joint mechanical driven by two pneumatic artificial muscle assemblies, and belongs to the technical field of bio-robots. The single-degree-of-freedom joint mechanical driven by the two pneumatic artificial muscle assemblies can be used in leg joints of the four-footed bio-robots. The single-degree-of-freedom joint mechanical driven by the two pneumatic artificial muscle assemblies comprises the two pneumatic artificial muscle assemblies, two rotary parts, a thigh framework and a crus framework, wherein the two ends of the two pneumatic artificial muscle assemblies are connected with the rotary parts and pin shafts. The single-degree-of-freedom joint mechanical driven by the two pneumatic artificial muscle assemblies has the bionic advantages of being large in movement range, high in movement speed, good in flexibility and the like.

The present invention relates to a manufacturing method of plastic ball valve, it is characterized by producing as the following steps: a. producing integrated spool which fixes and connects the valve bar and the valve ball into one unit; b, laying the valve ball of said integrated spool and the valve bar position connected with the valve ball in the die used for producing the plastic ball valve body; c. injecting the plastic material into the die used for producing the plastic ball valve body after the plastic material is heated and melted, cooling the plastic material in the die and modeling into plastic ball valve body, and the valve ball of integrated spool and the valve bar position connected with the valve ball is completely limited in the plastic ball valve body and can not be pulled out after the plastic ball valve body is cooled and shaped; d. connecting a plastic valve cover with through-hole on at least one open position of two side openings of plastic ball valve body, and linking the through-hole of plastic valve cover with the flow way in the plastic ball valve body. The invention is benefit for raising the products quality and extending the use life of products, and is facilitated the production of valve body.

The invention relates to the field of maintenance devices of railway turnout switching devices, in particular to an automatic oiling system of a turnout. The automatic oiling system of the turnout can carry out oiling lubrication on all the movable points of a locking device outside the turnout regularly. The automatic oiling system of the turnout comprises an oiling machine, a controller and a power supply mechanism, wherein the power supply mechanism is connected with the oiling machine, the oiling machine is connected with the controller, an oil supply pipe is connected to the oiling machine, the oil supply pipe is connected to a first towing point, a second towing point and a third towing point of the turnout, oil distributors are arranged on the two sides of the first towing point, the two sides of the second towing point and the two sides of the third towing point, the oil distributors are communicated with the oil supply pipe, and the oil distributors are connected with a lock hook, locking iron and a locking rod of the turnout through oil conveying pipes. According to the automatic oiling system of the turnout, lubricating oil is supplied through the oiling machine, oiling is carried out on components such as the lock hook, the locking iron and the looking rod through the oil supply pipe, the oil distributors and the oil conveying pipes, lubrication of the turnout is better, motion frictional force of the turnout is reduced, lubrication is even, and safety performance is improved.

The invention relates to automatic feeding monitoring equipment for an aquaculture pond. The automatic feeding monitoring equipment comprises a base frame with an open structure in the middle, two gravity guide mechanisms are symmetrically mounted on the left side of the base frame, two pairs of traveling slideways are symmetrically arranged on the front and rear sides of the base frame, a traveling vehicle is mounted on each pair of the traveling slideways, a transmission steel rope is connected between the left end of the traveling vehicle and the corresponding gravity guide mechanism, two steel slideways are symmetrically connected between the traveling vehicles on the traveling slideways, and an automatic feeding mechanism is mounted on the steel slideways; two first limiting mechanisms are symmetrically arranged in the middle of the right side of the base frame, two second limiting mechanisms are symmetrically arranged on two sides of the right side of the base frame, and a driving motor is mounted at the right end of the base frame through a motor seat. By the automatic feeding monitoring equipment, a function of omnibearing automatic fixed-point positioning and accurate feeding monitoring in the aquaculture pond can be realized, and working personnel is not needed to regularly tour and observe feeding position of aquatic feed.

The invention discloses a vertical air conditioner and air deflector sliding mechanisms. Each air deflector sliding mechanism comprises a rack, a motor, a gear and a guide rail groove, wherein the rack is located on the side, close to an air conditioner body, of an air deflector and comprises a tooth portion and a guide rail portion, the motor is located on the air conditioner body, the gear is rotationally connected with the motor and meshed with the tooth portion of the rack, the guide rail groove is located on the air conditioner body, the guide rail portion of the rack is located in the guide rail groove, the groove bottom and / or the groove wall of the guide rail groove are / is provided with a plurality of protruding support bodies, and the support bodies are in contact with the guide rail portion. In this way, the air deflector sliding mechanisms greatly reduce the contact areas between the guide rail portions and the guide rail grooves, so that the motion friction force is reduced, the racks are prevented from being influenced by the friction force during movement, the potential hazard that the air deflectors are stopped suddenly and even gets stuck when the air deflectors are driven to move is effectively avoided, and stable and smooth operation of the air deflectors is guaranteed.

The invention discloses a crawler type air-suspension transport vehicle. The crawler type air-suspension transport vehicle comprises a chassis, wherein a power system and a control system are arranged on the chassis, and crawler walking mechanisms in left-right symmetry and the same structure are respectively arranged on the left side and the right side of the bottom of the chassis; a frame is arranged in the middle part of the chassis; an upper bracket is arranged at the top of the frame; a bearing plate is horizontally arranged on the upper bracket; a lower bracket is arranged at the bottom of the frame; two air-jet load bearing devices are respectively arranged on the left side and the right side of the lower end of the lower bracket; each air-jet load bearing device is positioned at the inner part of the corresponding crawler walking mechanism; the front end and the rear end of each air-jet load bearing device are connected with the corresponding crawler walking mechanism through connecting rod mechanisms respectively; a spring is arranged between the chassis and each crawler walking mechanism; an air compressor and a high-pressure air storage tank are arranged in the frame; the outlet of the high-pressure air storage tank is connected with the air inlet of each air-jet load bearing device through a high-pressure air tube. The crawler type air-suspension transport vehicle disclosed by the invention is convenient to operate and control, easy to manufacture, low in cost, little in energy consumption, and high in safety and reliability, so that the crawler type air-suspension transport vehicle is especially suitable for transporting heavy cargoes at wharfs and ports.

The invention relates to a SMT screen plate detection device. The SMT screen plate detection device is characterized by comprising a base platform (10), a workpiece platform (9), a portal frame (7-1), a fixed beam (7) and a precision measuring head (3). Compared with the existing SMT screen plate detection platform, the SMT screen plate detection device provided by the invention has the advantages that shafting movement friction is reduced; through a linear motor for driving, system response time is obviously improved based on hardware so that detection device detection efficiency is improved; through an air flotation-type shafting structure, a shafting precision is improved so that a detection precision is improved; and SMT screen plate detection actual demands are fully considered so that operation convenience is improved and the platform basis is provided for a flow line-type full-automatic SMT screen plate detection system.

The invention discloses an adjustable glass curtain wall support which is formed by combination of glass fixing blocks, a connecting base and connecting arms, wherein the glass fixing blocks are used for fixing corners of mutually combined glass panes which are then fixedly connected through the connecting base. According to the adjustable glass curtain wall support, piezoelectric ceramic bodies are arranged inside the connecting arms, and the acting directions of the piezoelectric ceramic bodies are parallel to the lines connecting the connecting base with the glass fixing blocks; when glass expands under heat or contracts under cold, the connecting arms can stretch or retract slightly by changing the electric field of the piezoelectric ceramic bodies, and then deformation generated when the glass expands or contracts is corrected, and breakage of the glass due to excessive deformation is prevented. The adjustable glass curtain wall support is high in social benefit and economic benefit.

The invention discloses a glass lifter. The glass lifter comprises a guide rail (1) and sliding blocks (2) arranged inside the guide rail (1), wherein the guide rail (1) is a long groove-shaped guide rail composed of a first guide surface (3) and second guide surfaces (4) arranged on the two sides of the first guide surface (3); the sliding blocks (2) comprise sliding block bodies (8) in corresponding contact with the first guide surface and guide wheels (7) in corresponding contact with the second guide surfaces (4); and the sliding blocks are connected with a lifting mechanism through connecting shafts (5). According to the glass lifter structure, the traditional manner that the sliding blocks are in contact with the guide rail is changed, the motion friction force between the sliding blocks and the guide rail is reduced, the wear speed of the sliding blocks of the lifter is reduced, and the service life of the sliding blocks of the lifter is prolonged.

The invention discloses an outer R bearing type turning belt conveyor. The outer R bearing type turning belt conveyor comprises a bracket and a turning belt arranged on the bracket, wherein a turning rail is arranged at the outer side of the turning belt; a transmission mechanism is arranged on the turning rail; the transmission mechanism comprises a plurality of side turning chains and a plurality of chain plates which are arranged on pitches of the side turning chains; the chain plates are connected with the turning belt by connectors; the two ends of each chain plate are connected with the turning rail through wear-resisting strips; bearings are arranged on the chain plates; inner R sides of the chain plates are in rolling friction with the wear-resisting strips through bearings; the bearings are driven by a motor to drive the side turning chains to operate along the turning rail; meanwhile, the chain plates are driven by virtue of transmission of the side turning chains; and the chain plates pull the turning belt by virtue of the connectors to realize turning. Movement track friction force of a convention turning machine is reduced, a heating phenomenon of the turning machine is improved, and equipment operation noises are reduced.

The invention relates to a seal side hung door. The seal side hung door comprises a door installation board, a sliding door assembly slidably installed on the door installation board and a driving mechanism driving the sliding door assembly to slide along the door opening and closing direction in order to open and close an opening of the door installation board. The sliding door assembly comprisesa pull board and a door board. The pull board can slide along the door opening and closing direction. Upper and lower ends of the door board are connected with the pull board through connection assemblies. Each connection assembly comprises an oblique sliding rail and a sliding block. The oblique sliding rail is obliquely arranged relative to the door board. The sliding block is in sliding fit with the oblique sliding rail. One of the oblique sliding rail and the sliding block is fixed on the pull board while the other is fixed on the door board. The above connection assembly further comprises an elastic part connected between the pull board and the door board such that each sliding block can be located at the initial position relative to the oblique sliding rail during door opening and closing process. The door installation board is provided with a limiting part which limits the door board to continue sliding after the opening in the door board is closed. The seal side hung door is simple in structure, small in motion friction and good in seal effect.

The invention relates to a device for measuring rotational inertia and friction moment of a ball screw. The device comprises a bottom plate, two linear guide rails, the ball screw, a torque sensor, a servo motor, a mobile platform and two friction moment measuring mechanisms. Each linear guide rail is provided with two sliding blocks. The two ends of the ball screw are supported by the part, located between the two linear guide rails, of the bottom plate in a rotary mode through a fixed supporting base and a floating supporting base. One end of the torque sensor is connected with the end, supported by the fixed supporting seat, of the ball screw through a coupler. An output shaft of the servo motor is connected with the torque sensor through a coupler. The two friction moment measuring mechanisms are arranged on the two sides of a screw nut base respectively. Each friction moment measuring mechanism comprises a cantilever. A connecting sleeve is arranged at the tail end of each cantilever. Each connecting sleeve is connected with a sliding bar through a vertical linear bearing. The other end of each sliding bar is connected with a pressure sensor. Each sliding bar is sleeved with a spring. The bottom of each pressure sensor is connected with a universal ball. The bottom of each universal ball makes contact with a linear slab which is parallel to the ball screw. The linear slabs are tightly connected to the bottom plate.

The invention belongs to the field of hydraulic pressure, and relates to a two-stage corrugated pipe type pressure vessel capable of displaying volume. The pressure vessel comprises an outer cylinder (1), a convex seal head (2), a concave end cover (3), a primary corrugated pipe (4), a secondary corrugated pipe (5), a primary convex cover (6), a secondary convex cover (7), a connecting seat (8), a connecting flange (9), an indicating device (10), an oil inlet / outlet (11) and an inflation valve (12). The pressure vessel is suitable for the fields of pressure accumulators, pressurizing oil tanks and the like needing volume compensation and pressure stabilization, has the characteristics of small volume, high volume utilization rate, large expansion and contraction amount, strong volume compensation capability and good oil supply, and is low in manufacturing cost, high in material utilization rate, less in welding seam quantity and good in reliability. Meanwhile, a measuring range of an indicating device is shortened by adopting a primary corrugated pipe and a secondary corrugated pipe, and the overall size is shortened.

The invention discloses a diagnosis and treatment bed for a department of cardiology. The diagnosis and treatment bed comprises a bed body, a backrest and bed legs, the bed body comprises a lower board and vertical boards, the lower board is arranged on the bed legs, the vertical boards are arranged at the upper edges of the lower board, and the backrest is arranged on the vertical board on one side of a head of the bed. The diagnosis and treatment bed is characterized by further comprising a flexible mattress, an X screw plate, an X screw, a Y screw seat, an X motor plate, an X motor, a Y motor seat, a Y screw and a massage seat. The flexible mattress is arranged on the vertical boards; the X motor is fixed to the X motor plate, and a motor shaft of the X motor is connected with the X screw through a coupler. The screws are driven by the motors to drive the massage seat to move under the flexible mattress, the speeds of the motors can be selected according to requirements of a patient, the motors and the screws are low in operating noise, and further, by the soundproof effect of the flexible mattress and quilts, the patient can have massage without affecting rest. In addition, byadoption of the X and Y screws, motion positions of the massage seat can cover the whole flexible mattress, so that massage of the whole body including waist, back, buttocks, legs and the like of thepatient is guaranteed.

The present invention relates to a ball valve, particularly a plastic ball valve. The ball valve includes valve body within flow passage, valve seat and integrated spool which pre-connects the valve bar and the valve ball into one unit, the valve ball of said integrated spool is installed in the valve body, the valve bar of said integrated spool passes through the valve body, said valve ball seat is matched with the valve ball of integrated spool, it is characterized by: said valve body is plastic valve body and is equipped with one or two plastic valve covers with through-hole, said plastic valve covers are bonded with the plastic valve body, the through-hole of said plastic valve cover is connected with the flow passage in plastic valve body. The product can make the rotation of valve ball in plastic ball valve more flexible, and make the ball valve products has longer use life and thus has highly practical value.

The present invention discloses one kind of oil feeding slide block for circular loom with reduced friction force, protection of slide block and slide way, effective lubricating area and excellent lubricating effect. The technological scheme is that the oil feeding slide block includes large slide block, central shaft with two bosses, core housing, sealing ring, bearing, nylon sleeve, interval sleeve, washer and retaining ring. The assembled nylon sleeve has two end surfaces between the two bosses and has one section of free stroke. The improved slide block has rolling friction with the sliding way and some sliding friction, greatly reduced friction force, certain lubricating area and excellent lubricating effect.

The invention relates to the technical field of fan maintenance, and discloses equipment for cleaning dust attached to the surface of a rotating shaft of a fan and keeping the rotating speed. The equipment comprises a fixed disc, a water tank is fixedly installed on the inner wall of the fixed disc, a valve groove is formed in the bottom of the water tank, a telescopic rod is fixedly installed inside the valve groove, a valve block is slidably connected to the interior of the telescopic rod, and a magnet is fixedly installed on the right side of the valve block. An electromagnetic relay on a rotating plate attracts the magnet at the front end of the valve block of the water tank in the process that a conductive rod extends into a circuit connector and a rotating disc rotates, due to the fact that a through hole is formed in the portion, located inside the telescopic rod, of the valve block, the water tank communicates, a lubricating agent is sprayed out towards the rotating disc, the lubricant can be evenly smeared on the rotating disc and the fixed disc by virtue of the action of a stop block along with the continuous rotation of the rotating disc, the lubricant is automatically and evenly smeared on the rotating disc and the fixed disc, and the lubricating effect between the rotating disc and the fixed disc is enhanced.

The invention relates to a seal side hung door. The seal side hung door comprises a door installation board, a sliding door assembly slidably installed on the door installation board and a driving mechanism driving the sliding door assembly to slide along the door opening and closing direction in order to open and close an opening of the door installation board. The sliding door assembly comprisesa pull board and a door board. The pull board can slide along the door opening and closing direction. Upper and lower ends of the door board are connected with the pull board through connection assemblies. Each connection assembly comprises an oblique sliding rail and a sliding block. The oblique sliding rail is obliquely arranged relative to the door board. The sliding block is in sliding fit with the oblique sliding rail. One of the oblique sliding rail and the sliding block is fixed on the pull board while the other is fixed on the door board. The above connection assembly further comprises an elastic part connected between the pull board and the door board such that each sliding block can be located at the initial position relative to the oblique sliding rail during door opening and closing process. The door installation board is provided with a limiting part which limits the door board to continue sliding after the opening in the door board is closed. The seal side hung door is simple in structure, small in motion friction and good in seal effect.

The present invention relates to a manufacturing method of plastic ball valve, it is characterized by producing as the following steps: a. producing integrated spool which fixes and connects the valve bar and the valve ball into one unit; b, laying the valve ball of said integrated spool and the valve bar position connected with the valve ball in the die used for producing the plastic ball valve body; c. injecting the plastic material into the die used for producing the plastic ball valve body after the plastic material is heated and melted, cooling the plastic material in the die and modeling into plastic ball valve body, and the valve ball of integrated spool and the valve bar position connected with the valve ball is completely limited in the plastic ball valve body and can not be pulled out after the plastic ball valve body is cooled and shaped; d. connecting a plastic valve cover with through-hole on at least one open position of two side openings of plastic ball valve body, and linking the through-hole of plastic valve cover with the flow way in the plastic ball valve body. The invention is benefit for raising the products quality and extending the use life of products, and is facilitated the production of valve body.

The invention provides a balance type electromagnetic valve with a mechanical valve position indicator and a manual operating device. The balance type electromagnetic valve comprises a main valve, the valve position indicator and the manual operating device, wherein an inlet of the main valve is communicated with a system pressure pipeline; a valve core component is attached to a valve seat component to form seal under the combined action of a main spring and unbalanced force of a medium, and the mechanical valve position indicator provides a closing in-place signal at the time; when the electromagnetic valve is electrified, electromagnetic force acting on the valve core component overcomes the acting force of the main spring and the unbalanced force of the medium to push the valve core component to move, the main valve is opened, and the mechanical valve position indicator provides an opening in-place signal. According to the valve, connection and disconnection of liquid and gas of the pipeline can be realized quickly; the main valve is of the balance type structure, and the unbalanced force of the medium can be effectively reduced; the mechanical valve position indicator is arranged, so the judgment of a working state and fault diagnosis of the electromagnetic valve are facilitated, and conditions are provided for the system to realize automatic control; the manual operating device is arranged, so the valve can be reliably opened under the condition that no power supply or electromagnetic valve fails.

The invention discloses a sole and a shoe, the sole comprises a sole body and a support plate, the support plate is provided with a first extension part, a second extension part and an elastic bending part connecting the first extension part and the second extension part; the first extending part extends to the half sole from the heel of the sole body, the second extending part is located below the first extending part and located on the heel of the sole body, and the elastic bending part extends out of the heel of the sole body. According to the shoe sole and the shoe thereof, the elastic bending part is arranged outside the shoe sole body, so that the heel of the shoe sole can obtain larger elastic deformation, larger resilience force is further obtained, and the balance, the stability and the energy feedback characteristic of the shoe sole and the shoe are excellent.

The invention relates to a magnetostrictive micro-displacement meter, which is characterized in that the displacement meter includes a displacement meter end, a displacement meter base, a measuring rod, a waveguide wire, a linear guide rail and a movable terminal, and the displacement meter end is a cavity structure , a hardware circuit system is installed on the inner wall of the cavity structure, and a front damping device, a detection device and a fixing device are arranged in the cavity of the cavity structure; the right bottom of the end of the displacement meter is connected with the base of the displacement meter; The center of the right side of the end is provided with a threaded hole, and the left end of the measuring rod is threadedly connected with the threaded hole at the end of the displacement meter; the movable terminal is set on the measuring rod, and the linear guide rail is fixed on the base of the displacement meter along the length direction. A slider is installed on the top, the upper end of the slider is connected with the lower end of the movable terminal, and the slider is connected with an external mechanical device; the magnet inside the movable terminal adopts a "halbach" magnet array.

The invention relates to the technical field of computer auxiliary equipment, and discloses a device for always lubricating keys and a shaft of a keyboard in use. The device comprises a shell, a fixedblock is fixedly connected to the upper end of the inner wall of the shell, a guide column is fixedly connected to the lower end of the fixed block, and a pressing rod is fixedly connected to the left end of the guide column; the upper end of the pressing rod is movably connected with a moving rod, the outer surface of the moving rod is connected with a limiting block, the lower end of the pressing rod is movably connected with a bearing block, the lower end of the bearing block is fixedly connected with a lubricating oil tank, the right end of the lubricating oil tank is fixedly connected with a guide pipe, and the lower end of the guide column is fixedly connected with a connecting guide column; and the lower end of the connecting guide column is fixedly connected with a spring mechanism, and the outer surface of the spring mechanism is fixedly connected with a supporting block. A lubricant passes through the interior of the guide pipe to reach the interior of the spring mechanism to lubricate the interior of the spring mechanism so that the motion friction force in the spring mechanism is reduced, and the effect of lubricating the space between the keys and the shaft is achieved.

The invention relates to a single-degree-of-freedom joint mechanical driven by two pneumatic artificial muscle assemblies, and belongs to the technical field of bio-robots. The single-degree-of-freedom joint mechanical driven by the two pneumatic artificial muscle assemblies can be used in leg joints of the four-footed bio-robots. The single-degree-of-freedom joint mechanical driven by the two pneumatic artificial muscle assemblies comprises the two pneumatic artificial muscle assemblies, two rotary parts, a thigh framework and a crus framework, wherein the two ends of the two pneumatic artificial muscle assemblies are connected with the rotary parts and pin shafts. The single-degree-of-freedom joint mechanical driven by the two pneumatic artificial muscle assemblies has the bionic advantages of being large in movement range, high in movement speed, good in flexibility and the like.

The invention discloses an aviation piston core part structure and a preparation method. The aviation piston core part structure comprises a piston shaft and a piston top, the piston top is fixed to the top end of the piston shaft, and a base is fixed to the bottom end of the piston shaft; the piston top is composed of a circular truncated cone portion and a circular cone portion fixed to the circular truncated cone portion, the circular truncated cone portion is fixedly connected with the top end of the piston shaft, and the top end of the circular cone portion is provided with an arc-shapedpushing end; a sealing ring B fixedly sleeves the outer portion of the position, near the piston top, of the piston shaft, and the outer portion of the piston shaft is further fixedly sleeved with a sealing ring assembly; the sealing ring assembly is composed of a plurality of sealing rings A arranged evenly at intervals, and the surface of the arc-shaped pushing end is provided with a chromium nitride film layer. According to the aviation piston core part structure, the surface roughness of the arc-shaped pushing end is improved to be within 0.1, the hardness of the arc-shaped pushing end isimproved to HV20-25Gpa at the same time, the surface roughness of the obtained aviation piston core part structure can be within 0.1, the surface abrasive resistance of the aviation piston core part structure is improved simultaneously, and the high required standard of an aviation piston core is met.

The invention discloses an anti-leakage 3D printing extrusion head and a using method thereof. The anti-leakage 3D printing extrusion head comprises an automatic reset type anti-leakage internal plugging mechanism, a pressure induction type discharging control mechanism, a self-adaptive anti-leakage module clamping mounting device and a sealed extrusion head body. The invention belongs to the technical field of 3D printing extrusion heads, and particularly relates to a leakage-proof 3D printing extrusion head and a using method thereof. By means of the automatic reset type anti-leakage internal plugging mechanism and the pressure induction type discharging control mechanism, extrusion of an external feeding mechanism on a solid material wire serves as driving force, when the external feeding mechanism stops feeding, a self-adaptive lifting plugging column blocks a discharging opening in the bottom of a shell again under the elastic force effect of an automatic reset spring, and therefore the discharging opening in the bottom of the shell is blocked again. Leakage is prevented; under the condition that no independent driving device exists, the technical effect of passively controlling opening and closing of the discharging opening in the bottom of the shell is achieved through an ingenious mechanical structure, and the technical problem that a control valve cannot be placed in a high-temperature and narrow space is solved.