26 results about "External Powder" patented technology

The utility model belongs to the technical field of plasma rotating electrode powder manufacturing equipment, and relates to a vacuum dynamic sealing structure of a plasma gun for powder manufacturing, which comprises an external powder blocking module and a dynamic sealing module, the external powder blocking module consists of a first powder blocking plate, a powder blocking ring and an insulating powder blocking plate, the first powder blocking plate is fixed at the top of a plasma gun body to form an arc-shaped shielding surface, and the dynamic sealing module is fixed at the top of the plasma gun body. The powder retaining ring coaxially sleeves the positive electrode of the plasma gun body and forms an annular gap type powder blocking structure with the insulating powder retaining plate; the dynamic sealing module is sequentially provided with a dynamic sealing installation metal cylinder, an insulating cylinder and a sealing assembly from outside to inside in the radial direction of the plasma gun body, the insulating cylinder and the dynamic sealing installation metal cylinder form a step-shaped sealing structure, and vacuum sealing and electrical isolation are achieved between the dynamic sealing module and the external powder blocking module through bakelite and an O-shaped sealing ring. The vacuum dynamic sealing structure provided by the utility model has the advantages of powder isolation, reliable sealing, no burning loss short circuit and no need of vacuum grease auxiliary sealing lubrication.

The invention discloses a method for repairing a guide groove of a piston rod of an aircraft refueling probe, which belongs to the field of guide groove repairing methods and comprises the following steps: step 1, designing and manufacturing an inner hole cladding head with the outer diameter of not more than 40mm, the laser focal length of 15-20mm and the powder coke of 15-20mm; 2, an inner groove of the oil receiving probe to be repaired is pretreated, namely a dry lubricant on the surface is removed through abrasive paper, and alcohol or acetone is used for cleaning after ultrasonic cleaning; 3, the high-strength stainless steel powder is subjected to vacuum drying at a certain temperature, the powder is taken out after being cooled, the powder is loaded into a powder bin of external powder feeding equipment, heating is started, and the temperature is set to be 50-80 DEG C; and 4, the oil receiving exploring tube is fixed to an external positioner. According to the method, the laser inner hole cladding repairing technology is adopted, the special inner hole cladding gun is assembled, the reachability of repairing the guide groove is good, the method has the advantages of low heat input, high repairing precision, small surface roughness and the like, the post-processing difficulty is greatly reduced, and the repairing success rate is high.

The utility model discloses an external powder delivery device for a filling machine, including: a bracket, a powder barrel, a powder barrel seat, a vibrating member, a valve assembly and a connecting pipe group. The powder barrel seat is installed at the upper end of the bracket, the powder barrel is installed in the powder barrel seat, a discharge port is provided at the lower end of the powder barrel, the upper end of the connecting pipe group is connected to the discharge port through the valve assembly, the valve assembly is used to connect or close the discharge port to the connecting pipe, the lower end of the connecting pipe group passes through one side of the bracket, the vibrating member is installed on the outer wall of the powder barrel seat, and the vibrating member is used to drive the powder barrel to vibrate. Through the application of the utility model, an external powder delivery device for a filling machine is provided, the opening or closing of the powder barrel and the connecting pipe group is controlled by the valve assembly, no manual powder addition is required, and the powder barrel seat is driven to vibrate by the vibrating member, thereby driving the powder barrel and the connecting pipe group to vibrate, so that the powder barrel and the connecting pipe group can deliver powder more thoroughly.

The utility model relates to the technical field of calcium silicate composite boards, in particular to a calcium silicate composite board with a high-temperature metal powder coating, which comprises a calcium silicate layer, a bonding layer, a metal thin layer and a powder coating which are sequentially arranged from bottom to top, the thickness of the powder coating is 80-200mu m, and the surface hardness of the powder coating is 3-8H; by coating the surface of the calcium silicate layer with the bonding layer, the metal thin layer is attached to the surface of the calcium silicate layer to form the semi-finished product, namely, the metal surface is formed on the surface of the calcium silicate layer, so that the semi-finished product has metal conductivity; the surface of the metal thin layer is evenly coated with external powder in an electrostatic spraying machining mode, the powder coating is formed after high-temperature curing, and the calcium silicate composite board with the high-temperature metal powder coating is formed, so that the requirements for corrosion resistance, moisture resistance and weather resistance of a wall decoration material are met, the hardness of a veneer is improved, and the use requirements for wear resistance and easy cleaning are met.

A pet freeze-drying powder spraying mechanism comprises a conveying belt, two sealing pipelines are arranged above the conveying belt in the conveying direction in a spaced mode, and the ends of openings of the two sealing pipelines are connected to an external powder spraying main machine through control pipelines; a plurality of powder spraying mechanisms are arranged below the sealing pipelines at intervals in the direction perpendicular to the conveying direction of the conveying belt, and the multiple powder spraying pipelines of the two sealing pipelines are obliquely arranged in the direction facing the control pipeline and the direction away from the control pipeline correspondingly. The conveying belt is further provided with guide separation blocks in front of the sealing pipeline, and the multiple guide separation blocks are arranged in the direction perpendicular to the conveying direction of the conveying belt. Different from a conventional powder rolling mode, the requirement for covering the freeze-dried powder on the surface of the freeze-dried pet can be met, and the requirement for covering different types of freeze-dried powder can be met not limited to the same type of freeze-dried powder.

The application discloses a coal-powder storage and release mechanism-based thermal power generating unit control method and system, and relates to the technical field of electric power energy production and heat supply. According to historical power grid load data, historical electric power market transaction information and weather forecast information, a power grid load prediction result in a future time period is predicted; according to the power grid load prediction result in the future time period and current time boiler state data, pulverizing state data and external coal bunker state, a control strategy is determined; the control strategy is a coal-powder storage strategy or a release strategy; in the case that the control strategy is the coal-powder storage strategy, a pulverizing system and a powder feeding device are controlled to store coal powder in an auxiliary external powder bunker to a target storage amount; in the case that the control strategy is the release strategy, a release instruction is sent to the auxiliary external powder bunker, so that the auxiliary external powder bunker delivers coal powder to a boiler of the thermal power generating unit according to the release strategy. The method can accurately regulate and control the thermal power generating unit.

This invention relates to the field of laser printing rapid prototyping technology, and discloses an external powder feeding mechanism on the side wall of a 3D printing metal laser melting device. The mechanism includes a material cylinder and a spiral blade rotatably disposed within the cylinder. The output end of the material cylinder is connected to a laser printing head, and the input end of the material cylinder is connected to a filling hopper via a fixed component. The device also includes: an anti-caking section comprising a partition fixedly connected through the filling hopper, and an inner plate movably disposed through the partition; a toothed plate fixed to the partition and movable teeth fixed to the inner plate; and a driving component connected to the partition to push the movable teeth to break up agglomerates; an anti-static section comprising a hollow chamber inside the partition, toothed blocks, and movable teeth, and multiple exhaust ports evenly distributed through the movable teeth; and an air supply component connected to the driving component to prevent static electricity buildup; and a filtration section comprising a soft magnetic tape rotatably disposed via gear transmission, and a filter screen disposed below the partition and inner plate; and a scraping component to separate metal powder and impurities.

The utility model discloses a novel electric powder distributor, and aims to provide the novel electric powder distributor which is simple in structure, convenient to operate, capable of synchronously vibrating and distributing powder in the powder taking process and capable of performing self-adaptive adjustment according to the depth of a coffee powder bowl. The powder distributing device comprises a base and a powder distributing device module, the powder distributing device module comprises a rotating motor, a rotating ring and a powder distributing frame, a rotating through opening is formed in the middle of the base, the rotating ring is in rotating fit with the rotating through opening, the rotating motor is arranged on one side of the base and is in rotating fit with the outer edge of the rotating ring, and the rotating motor is arranged on the other side of the base and is in rotating fit with the outer edge of the rotating ring. A plurality of lifting grooves are formed in the inner side of the rotating ring, a plurality of limiting blocks are arranged on the outer side of the powder distribution frame, the limiting blocks are matched with the lifting grooves, and the rotating ring drives the powder distribution needle end of the powder distribution frame to be matched with an external powder bowl. The powder distributor is applied to the technical field of powder distributors.

The utility model discloses a powder pumping device with a quick connection structure, which comprises a powder pumping device body and a powder outlet pipe, the powder pumping device body is connected with the powder outlet pipe through a flange at a pipe body of the powder pumping device body, the powder pumping device further comprises a sleeve rotating head and a connection rotating head, the sleeve rotating head is sleeved outside the pipe body of the powder outlet pipe in a clamping mode, and the connection rotating head which abuts against a flange plate at one end of the powder outlet pipe is connected in the sleeve rotating head in a rotating mode. The sleeve rotating head is arranged at the powder outlet pipe of the powder pumping device body, the butt-joint connecting rotating head is arranged at the sleeve rotating head in a matched mode, after the sleeve rotating head is assembled outside a pipe body of the powder outlet pipe, the connecting rotating head can be assembled outside the powder conveying pipeline, and then the connecting rotating head can be connected into the sleeve rotating head in a rotating mode to sleeve and cover a flange plate of the powder conveying pipeline and a flange plate of the powder outlet pipe. And the half connecting pipe A and the half connecting pipe B form an external thread connecting pipe which is sleeved outside flange plates of a powder conveying pipeline and a powder outlet pipe, so that the powder outlet pipe of the powder pumping device body can be quickly connected with an external powder conveying pipeline.

This invention belongs to the field of material surface modification and thermal spraying technology, and provides a method for preparing a semi-ceramic coating to enhance the bonding strength of a resin surface. The method includes: preparing a composite powder using Al2O3, phenolic resin, and hexamethylenetetramine; for a cured glass fiber reinforced epoxy resin matrix, while preserving the integrity of the internal glass fiber structure, performing laser texturing pretreatment on the matrix surface to form regularly arranged micron-level concave-convex patterns; and using a supersonic plasma spraying process, spraying the composite powder onto the treated matrix surface via external powder delivery to form a semi-ceramic coating. This invention, through synergistic control of the laser texturing morphology and spraying heat input, can achieve dual enhancement of mechanical interlocking and interfacial compatibility. The resulting coating has a bonding strength with the resin matrix of no less than 20 MPa, and the interface is free of ablation or cracks. This method is particularly suitable for aerospace, electronic packaging, and other fields.

The invention relates to the technical field of constructional engineering, and discloses a concrete carbonization depth detection method and system, and the detection method comprises the following steps: drilling a hole in the surface of a to-be-detected concrete structure; spraying phenolphthalein alcohol to the concrete powder when the drill bit carries out the concrete powder in the hole; obtaining the color of the concrete powder sprayed with phenolphthalein alcohol; if the concrete powder sprayed with the phenolphthalein alcohol is red, drilling is stopped, and the drilling depth at the moment is measured; and if the concrete powder sprayed with the phenolphthalein alcohol is not red, continuously drilling until the concrete powder is red. In the drilling process of the concrete structure, powder generated during drilling can be continuously brought out of the hole, phenolphthalein alcohol is directly sprayed to the external powder, whether concrete is carbonized or not can be quickly responded in real time according to whether a phenolphthalein alcohol reagent becomes red or not, the operation of detecting the powder outside the hole is simple and convenient, and the detection accuracy is high. And the surface of the concrete structure cannot be greatly damaged.

The invention relates to the technical field of laser printing rapid prototyping, and discloses a 3D printing metal laser melting equipment side wall external powder feeding mechanism which comprises a charging barrel and a spiral blade rotationally arranged in the charging barrel, the output end of the charging barrel is connected with a laser printing head, and the input end of the charging barrel is connected with a filling hopper through a fixing part. The anti-caking part comprises a partition plate which penetrates through the filling hopper and is fixedly connected with the filling hopper, an inner plate which movably penetrates through the partition plate, a toothed plate fixed on the partition plate, movable teeth fixed on the inner plate, and a driving and pushing piece which is connected with the partition plate and is used for pushing the movable teeth to damage cakes; the electricity eliminating part comprises a partition plate, a tooth block, a hollow cavity in the movable tooth, a plurality of exhaust ports evenly formed in the mode of penetrating through the movable tooth and an air supply piece connected with the driving and pushing piece so as to prevent static electricity accumulation. The impurity filtering part comprises a soft magnetic belt which is driven by a gear set to rotate, a filter screen which penetrates through the partition plate and the lower portion of the inner plate, and a shoveling and scraping piece which is used for separating metal powder and impurities.

The invention relates to a multi-channel discharge detection and control method and device in electric spark mirror finishing, which are applied to the technical field of electric spark mirror finishing, and comprises the following steps of: realizing accurate identification of single-channel, multi-channel and abnormal discharge states through discharge current rising edge and discharge voltage breakdown delay detection; different control actions are set according to different working modes, so that the aim of automatically increasing, reducing or maintaining the concentration of the carbon powder is fulfilled; the limitation of traditional control depending on manual experience is overcome, and the machining stability and universality are improved; carbon powder and metal filing powder are automatically generated through a reverse repair tool electrode, the number density of free electrons of the machining fluid is improved, conversion from single-channel discharge to multi-channel discharge is promoted, discharge energy is dispersed, large-area mirror machining in common machining fluid is achieved, external powder does not need to be additionally added, and the powder separation problem of mixed powder machining fluid is solved.

The utility model relates to carbon powder box structure technical field, concretely is a kind of carbon powder box structure of large capacity, including carbon powder box ontology, the surface of carbon powder box ontology is equipped with connecting frame, the surface of connecting frame is provided with first side cover, the inside of carbon powder box ontology and the surface of connecting frame are provided with increase powder amount mechanism, the surface of powder adding port is provided with external powder adding mechanism. The utility model not only makes carbon powder box structure when using can accommodate more carbon powder, improves work efficiency, also can guarantee the printing quality of printer, reduces the downtime caused by replacing carbon powder box ontology, and makes carbon powder box structure when using need not to take down second side cover from the surface of carbon powder box ontology, the inside of carbon powder box ontology is added powder, so that carbon powder box structure is more convenient operation when using, and, can guarantee the sealing property of carbon powder in the inside of carbon powder box ontology.

The invention belongs to the technical field of plasma rotating electrode powder manufacturing equipment, and relates to a vacuum dynamic sealing structure of a plasma gun for powder manufacturing and a using method.The vacuum dynamic sealing structure comprises an external powder blocking module and a dynamic sealing module, and the external powder blocking module is composed of a first powder blocking plate, a powder blocking ring and an insulating powder blocking plate; the first powder blocking plate is fixed to the top of the plasma gun body to form an arc-shaped shielding face, and the powder blocking ring is coaxially arranged on the positive electrode of the plasma gun body in a sleeving mode and forms an annular gap type powder blocking structure with the insulating powder blocking plate. The dynamic sealing module is sequentially provided with a dynamic sealing installation metal cylinder, an insulating cylinder and a sealing assembly from outside to inside in the radial direction of the plasma gun body, the insulating cylinder and the dynamic sealing installation metal cylinder form a step-shaped sealing structure, and vacuum sealing and electrical isolation are achieved between the dynamic sealing module and the external powder blocking module through bakelite and an O-shaped sealing ring. The vacuum dynamic sealing structure provided by the invention has the advantages of powder isolation, reliable sealing, no burning loss short circuit and no need of vacuum grease auxiliary sealing lubrication.

Provided is a sprayed powder recovery anti-explosion safety device. Relates to the technical field of powder spraying equipment. The device is arranged on the inner side of a recovery tank, a powder suction pipe is arranged on the top of the recovery tank, an exhaust pipe is arranged at the bottom of the recovery tank, the powder suction pipe is used for sucking external sprayed powder into the inner side of the recovery tank, the device comprises a spraying mechanism and a material receiving mechanism, and the spraying mechanism comprises a mounting ring and a plurality of spraying heads arranged at the bottom of the mounting ring; the plurality of spray heads form a water curtain in the recovery tank; the material collecting mechanism comprises a material collecting hopper, the mounting ring is arranged on the upper portion of the inner side of the recycling tank, the material collecting hopper is arranged on the lower portion of the inner side of the recycling tank, and the sprayed powder penetrates through the water curtain and falls into the inner side of the material collecting hopper. According to the spraying device, through the spraying effect of the spraying mechanism on the sprayed powder sucked into the recycling tank, rapid sedimentation of the sprayed powder is promoted, then the dust concentration of the sprayed powder in the recycling tank is reduced, and dust explosion is prevented.

The present invention discloses a closed-loop management device and method for screening, recycling and powder feeding in powder bed additive manufacturing; it includes a powder screening bin, a powder recycling bin, a two-position three-way solenoid valve, a two-position two-way solenoid valve, a powder inlet of the powder screening bin, which is connected to the outer area of the forming cylinder through a powder feeding pipe; a powder outlet of the powder screening bin, which is connected to the outer area of the powder cylinder through a powder conveying pipe; the first outlet of the two-position three-way solenoid valve is connected to the powder screening bin through a pipe; the second outlet of the two-position three-way solenoid valve is connected to the connection between the powder outlet of the powder screening bin and the powder conveying pipe through a pipe. During the additive manufacturing process, the present invention implements closed-loop management for powder screening, recycling, powder feeding, etc., overcoming the problems in the traditional process that during the printing process, due to the large size of the printed part or insufficient powder material, etc., external powder screening is required and then the equipment needs to be opened to add powder, resulting in printing interruption and thus affecting the performance of the sample part.

The application relates to a preparation method of a high-hardness high-temperature steam oxidation-resistant composite structure coating, which comprises the following steps: S1, pretreating the surface of a workpiece needing to prepare a coating; S2, preparing an aluminum-containing nickel-based or aluminum-containing cobalt-based metal primer layer with a thickness of 80-150 microns on the surface of the workpiece; and S3, selecting a suspension liquid with a certain proportion and content of yttrium silicate, alumina micropowder and an organic solvent as raw materials, and preparing a ceramic top layer with a thickness of 100-350 microns on the surface of the primer layer by adopting an atmospheric plasma spraying technology in an external powder feeding mode. The preparation method can regulate the wear resistance of the coating, meanwhile, the cracking and peeling phenomena caused by thermal stress during the heating and cooling processes of the coating can be avoided, and the long-acting high-temperature steam corrosion resistance of the coating can be realized.

The plasma spray gun applying the high-ignition-point graphite boat coating comprises a nozzle, a powder inlet hole is formed in the side wall of the nozzle, the nozzle is sleeved with a powder feeding frame, the powder feeding frame is provided with a through hole corresponding to the powder inlet hole, the powder feeding frame is connected with a powder feeding needle sleeve, and a needle tube of the powder feeding needle sleeve penetrates through the through hole of the powder feeding frame and is inserted into the powder inlet hole of the nozzle. According to the internal powder feeding device, zirconium oxide powder enters flames in advance through the internal powder feeding design, compared with an external powder feeding mode, powder melting is good, meanwhile, airflow of the internal powder feeding device forms rotating airflow, it is guaranteed that powder materials are more concentrated to form a compact coating, and therefore the powdering rate is better improved.

The invention discloses an efficient grading jet mill, which belongs to the technical field of jet milling and comprises a grinding mechanism, an efficient grading mechanism, a collecting assembly and a plurality of support frames, the grinding mechanism, the efficient grading mechanism and the collecting assembly are installed on the supporting frame. The grinding mechanism comprises a grinding cylinder and an airflow crushing assembly, the feeding pipeline is fixedly connected with the grinding cylinder, one end of the feeding pipeline is communicated with an external powder conveyor, and the other end of the feeding pipeline penetrates through the grinding cylinder; the grinding cylinder is connected with the airflow crushing assembly; the efficient grading mechanism is mounted on the upper side of the grinding cylinder; the efficient grading mechanism comprises a grading assembly and a material returning assembly, the grading assembly is installed on the upper side of the grinding cylinder, and the material returning assembly is installed on the grinding cylinder; the grading assembly is connected with the collecting assembly. By means of the mode, the material returning assembly recycles materials graded through the grading assembly in a unified mode and then feeds the materials to the lower side of the grinding cylinder again, and the situation that large-particle materials directly fall down in the grinding cylinder and interfere with ascending airflow is avoided.

The present invention discloses a preparation method of a V-shaped ultra-high temperature ceramic nanowire toughened carbon-based composite material, including the preparation of a low-density carbon fiber preform, the loading of a catalyst, the deposition for preparing ultra-high temperature ceramic nanowires, obtaining a carbon fiber preform with in-situ grown V-shaped ultra-high temperature ceramic nanowires, and densification; by adjusting parameters such as temperature and pressure during the deposition process, the present invention can effectively control the microscopic morphology such as the diameter and growth direction of the ultra-high temperature ceramic nanowires; through an external powder precursor delivery device, the introduction sequence and content of the ultra-high temperature ceramic precursor can be accurately controlled, thereby effectively controlling the composition of the ultra-high temperature ceramic nanowires; the present invention can achieve the preparation of multi-component solid solution ultra-high temperature ceramic nanowires at a relatively low temperature (<1600 °C), and introduce ultra-high temperature ceramics with ultra-high melting points into the carbon fiber preform.

The invention discloses a coil positioning lossless die-casting method, which comprises the following steps of: bending a terminal of a coil to form a bent part; placing the substrate module into the bending part, and placing the core body module into the middle hole of the coil; filling powder outside the coil to obtain a combined body; and carrying out die casting on the assembly to obtain an inductor blank. According to the invention, the prefabricated sub-module is arranged in the area where the coil is easy to deform and the filled powder is easy to leak, and only the coil is filled with the powder, so that the prefabricated sub-module ensures that the coil is well supported in the die-casting process, the deformation quantity of the inductor blank is mainly borne by the external powder, and unexpected deformation or damage to the coil is not caused; and the production yield of the small-size inductor is greatly improved.

The application discloses a glass substrate pool furnace charge ball grinding device, which comprises a glass substrate pool furnace charge ball grinding cylinder assembly, a plurality of groups of discharge blocking assemblies are arranged around the outer wall of the cylinder body of the glass substrate pool furnace charge ball grinding cylinder assembly, and the rotating support of the glass substrate pool furnace charge ball grinding cylinder assembly is arranged on a support base frame assembly; the discharge blocking assembly forms a discharge screen blocking structure outside the glass substrate pool furnace charge ball grinding cylinder assembly; and the support base frame assembly forms a rotating support base structure below the glass substrate pool furnace charge ball grinding cylinder assembly. When the device is used, powder discharge screen holes form a powder screening discharge structure on the outer wall surface of the six-cylinder six-rib type ball grinding cylinder; a powder discharge cavity is formed between the outer protective cylinder and the six-rib type ball grinding cylinder, and the powder discharge cavity is used for temporarily storing the discharged powder; an end discharge air pipe is communicated with an external powder air extraction device; and a negative pressure powder discharge structure is formed in the powder discharge cavity through an external negative pressure air extraction device.

The invention relates to the technical field of metal additive manufacturing, and provides an external powder adding device for 3D printing and a head-tail self-locking method in order to achieve efficient, sealed, simple and convenient powder supplementing in 3D printing equipment and solve the technical problems of pressure balance, powder dust raising and operation complexity in the powder supplementing process. An upper cover is arranged above one barrel body, a powder falling opening is formed in the bottom of the barrel body, a cover plate movably connected with the inner bottom of the barrel body is arranged above the powder falling opening, a support is fixedly connected to the inner side wall of the barrel body, and an ejector pin used for ejecting the cover plate in the other barrel body is arranged at the top of the support. The lower portion of the barrel body is provided with a guide inclined face inclining inwards, and a step face is arranged between the top of the guide inclined face and the adjacent portion above the guide inclined face. Automatic flowing-in and sealed storage of powder are achieved, the operation process is remarkably simplified, dust raising of the powder is avoided, the powder supplementing efficiency is improved, meanwhile, the pollution risk to the environment and equipment is reduced, and the labor intensity and the operation error probability of operators are reduced.

This utility model discloses a uniform powder-spreading device, relating to the field of food processing technology. It includes a mounting block, characterized in that: a drive motor is mounted on the lower end of the mounting block; a rotating plate is fixedly connected to the output end of the drive motor; a limiting plate is provided below the rotating plate; a spiral groove is formed on the limiting plate; a slider is slidably connected to the lower end of the rotating plate; a sliding column corresponding to the spiral groove is fixedly connected to the lower end of the slider; a powder spraying head is rotatably connected to the lower end of the sliding column, and the powder spraying head is located below the limiting plate; a pipe is connected to one side of the powder spraying head, and the other end of the pipe is connected to an external powder spraying pump. The beneficial effects of this utility model are: this structure facilitates uniform powder spreading within a circular area, allows for adjustment and adaptation for uniform powder spreading, and provides more flexible powder spreading.

The invention discloses an inductance small terminal feeding machine which comprises a machine frame, a plurality of positioning jigs, a feeding mechanism, a distributing mechanism, a feeding transferring mechanism, a taking and placing mechanical arm and a jig carrying mechanism. A plurality of clamping hole channels arranged in a penetrating mode are formed in the positioning jigs, and the discharging end of the feeding mechanism is in butt joint with the feeding end of the distributing mechanism; the distributing mechanism can insert each inductor U-shaped small terminal into a clamping hole channel of a positioning jig on the feeding and transferring mechanism, and the positioning jig is movably installed on a transferring part of the feeding and transferring mechanism. The material taking and placing mechanical arm can drive the positioning jig to be transferred to a material pressing part of an external powder forming press and eject out each inductance U-shaped small terminal in the positioning jig to achieve material stripping. The small terminal feeding device is high in automation degree, free of manual intervention, high in linkage precision with a powder forming press, capable of ensuring the consistency and forming quality of products and achieving full-automatic, high-precision and high-efficiency small terminal feeding, and particularly suitable for batch production of precise electronic elements.