CN217262976U

CN217262976U - Automatic feeding screening device of full-automatic nut welding equipment

Info

Publication number: CN217262976U
Application number: CN202221075749.9U
Authority: CN
Inventors: 唐英
Original assignee: Guangzhou Highcomm Electromechanical Technology Co ltd
Current assignee: Guangzhou Highcomm Electromechanical Technology Co ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2022-08-23
Anticipated expiration: 2032-05-06

Abstract

The utility model discloses a full-automatic nut welding equipment's automatic feeding screening plant, include: the device comprises a feeding bin, a vibration disc and a screening device; throw the feed bin and be located one side of vibrations dish, the top of throwing the feed bin is provided with the charge door, it is provided with the discharge gate to throw one side that the feed bin is close to the vibrations dish, it is provided with ejection of compact ejecting device to throw the feed bin bottom, the discharge gate is connected with the decurrent direction passageway of slope, the end of downflow of direction passageway is located the top of vibrations dish, it has the blown down tank to stretch out above the vibrations dish, the end that stretches out of blown down tank is connected in sieving mechanism, this full-automatic nut welding equipment's automatic feeding sieving mechanism can carry out the material loading screening to the sheet metal component automatically, it is accurate high-efficient, the cost of labor and intensity of labour have effectively been reduced.

Description

Automatic feeding screening device of full-automatic nut welding equipment

Technical Field

The utility model relates to an automobile parts processing technology field, concretely relates to full-automatic nut welding equipment's automatic feeding screening plant.

Background

At present, most of the assembly of the sheet metal parts in the domestic automobile industry needs nut welding, and in the prior art, in the process of welding the nut on the sheet metal parts, the feeding of the sheet metal parts still adopts the traditional manual feeding, so that the defects of high labor intensity, high labor cost, low production efficiency and the like exist, and the manual detection which can not be accurate judges whether the corresponding sheet metal parts meet the specification requirements, so that the subsequent welding work is easily influenced, and the yield of products is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a full-automatic nut welding equipment's automatic feeding screening device, it can carry out the feeding screening to the sheet metal component automatically, and is accurate high-efficient, has effectively reduced cost of labor and intensity of labour.

To achieve the purpose, the utility model adopts the following technical proposal:

the utility model provides a full-automatic nut welding equipment's automatic feeding sieving mechanism, includes: the device comprises a feeding bin, a vibration disc and a screening device; the feeding bin is located on one side of the vibration disc, a feeding port is arranged above the feeding bin, the feeding bin is close to one side of the vibration disc and is provided with a discharging port, the bottom of the feeding bin is provided with a discharging ejection device, the discharging port is connected with a guide channel inclined downwards, the lower end of the guide channel is located above the vibration disc, a discharging groove is extended out of the top of the vibration disc, and the extending end of the discharging groove is connected with the screening device.

As a preferred scheme of an automatic feeding screening device of full-automatic nut welding equipment, the screening device comprises a guide rail, a positioning mechanism, a side pulling mechanism, a plate part hole distance detection mechanism, a spacing mechanism and a bad channel, wherein the guide rail is obliquely fixed, the upstream end of the guide rail is positioned below the extending end of a discharge chute, rollers are distributed on the guide rail in parallel along the length direction of the guide rail, two sides of the upper part of the guide rail are provided with baffles, the baffles at the two sides are respectively provided with opposite notches, the side pulling mechanism is arranged above the guide rail and positioned at the notches at the two sides, the plate part hole distance detection mechanism is arranged below the guide rail and positioned between the notches at the two sides, the positioning mechanism is arranged above the guide rail and positioned at the downstream end of the notches at the two sides, the spacing mechanism is arranged above the guide rail and positioned at the upstream end of the notches at the two sides, a receiving port is arranged above the bad channel and is positioned below one of the notches at the two sides;

the side pulling mechanism is used for pulling the metal plate out of the bad channel from the side, the hole distance detection mechanism is used for detecting the hole distances of the two sides of the metal plate, the positioning mechanism is used for positioning the metal plate between the notches of the two sides, and the blocking mechanism is used for blocking the next metal plate from entering the notches of the two sides.

As a preferred scheme of the automatic feeding screening device of the full-automatic nut welding equipment, the side pulling mechanism comprises: the side draw cylinder, clamp plate and two side arm-tie, two the side arm-tie is located both sides respectively breach department, the clamp plate is fixed connection respectively in two the side arm-tie is located two top between the side arm-tie, the side draw cylinder is fixed in one side of guided way, just the piston rod fixed connection of side draw cylinder is in one of them the side arm-tie.

As a preferred scheme of an automatic feeding screening device of full-automatic nut welding equipment, the plate member hole distance detection mechanism comprises: the detection device comprises detection cylinders and detection heads, wherein the number of the detection cylinders is equal to the number of holes of a metal plate, the detection cylinders are fixed below the guide rails and vertically face the guide rails, the detection heads are fixed at the tail ends of piston rods of the detection cylinders, through holes are formed in positions, right opposite to the guide rails and the detection heads, of the guide rails, the distance between the detection heads is equal to the distance between holes of the metal plate, a metal plate sensor is arranged on the inner side surface of one side pull plate, and the height of the metal plate sensor is higher than the height of the upper surface of the metal plate when the metal plate is located on the guide rails.

As a preferred scheme of full-automatic nut welding equipment's automatic feeding screening plant, positioning mechanism includes locating piece and location cylinder, the location cylinder is fixed in the top of guided way, just the perpendicular orientation of location cylinder the guided way, the locating piece is fixed in the piston rod end of location cylinder, the locating piece is located both sides between the downflow end of breach.

As a preferable scheme of the automatic feeding screening device of the full-automatic nut welding equipment, the blocking mechanism comprises: keep off the pin and keep off the cylinder, it transversely is fixed in to keep off the cylinder one side of guided way, just it moves towards perpendicularly to keep off the cylinder the guided way, keep off pin fixed connection in keep off the end of cylinder, keep off the pin and transversely be located both sides between the upstream end of breach.

As a preferred scheme of the automatic feeding screening device of the full-automatic nut welding equipment, the automatic feeding screening device further comprises an adjusting cylinder, the adjusting cylinder is fixed below the guide rail, the adjusting cylinder is parallel to the guide rail, and one of the detecting cylinder is fixedly connected to a piston rod of the adjusting cylinder.

As a preferred scheme of the automatic feeding screening device of the full-automatic nut welding equipment, the discharging ejection device comprises: the ejection device comprises an ejection cylinder and an ejection block, wherein the bottom of the feeding bin is close to the discharge outlet and is provided with an ejection outlet, the ejection cylinder is vertically fixed below the feeding bin, the ejection cylinder is right opposite to the ejection outlet, the ejection block is fixed on a piston rod of the ejection cylinder and is matched with the ejection outlet, and the upper surface of the ejection block is an inclined surface obliquely opposite to one side of the discharge outlet.

As an optimal scheme of the automatic feeding screening device of the full-automatic nut welding equipment, the bottom of the feeding bin is of an inverted frustum structure with an opening gradually contracting towards the top outlet.

As a preferred scheme of the automatic feeding screening device of the full-automatic nut welding equipment, an cover plate is arranged above the feeding opening, one side of the cover plate is rotatably connected with one side of the feeding opening, and a handle is arranged on the cover plate.

The utility model has the advantages that: the utility model provides an automatic feeding screening device of full-automatic nut welding equipment is through setting up the cooperation structure of throwing feed bin, vibrations dish and sieving mechanism, and throw the feed bin bottom and be provided with ejection device of ejection of compact, vibrations dish is connected respectively in throwing feed bin and sieving mechanism through direction passageway and blown down tank; when the vibrating plate feeding device works, a worker adds sheet metal parts into a feeding bin through a feeding port, a vibrating plate is started, an ejection device ejects the sheet metal parts in the feeding bin upwards, the ejected sheet metal parts fall out of a discharging port and enter the vibrating plate through a guide channel, an amplitude device in the vibrating plate sends out high-frequency vibration action according to a set value frequency to be used on the sheet metal parts, the sheet metal parts generate regular jumping under the action of external force, the sheet metal parts orderly climb upwards according to the guide in the vibrating plate and are orderly arranged and mutually extruded among the sheet metal parts, when the directions or the front and the back of the sheet metal parts do not accord with the feeding requirement, the sheet metal parts are guided to fall to the bottom layer of the vibrating plate to be sorted again until the sheet metal parts are led out of the discharging tank and enter a screening device, the screening device detects and screens the sheet metal parts, screens the sheet metal parts with different specifications, and qualified sheet metal parts enter the next process; thereby realize carrying out the function of material loading screening to the sheet metal component automatically, accurate high-efficient, effectively reduced cost of labor and intensity of labour.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic structural view of an automatic feeding and screening device of a full-automatic nut welding device according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of another angle of the automatic feeding and screening device of the full-automatic nut welding equipment according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a screening device according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of another angle of the screening device according to an embodiment of the present invention.

In the figure:

1. a feeding bin; 2. a vibration plate; 3. a feed inlet; 4. a discharge port; 5. a guide channel; 6. a discharge chute; 7. a guide rail; 8. a roller; 9. a baffle plate; 10. a bad channel; 11. a material receiving port; 12. a side pull cylinder; 13. pressing a plate; 14. a side pulling plate; 15. detecting a cylinder; 16. a detection head; 17. positioning blocks; 18. positioning the air cylinder; 19. a barrier rod; 20. a blocking cylinder; 21. adjusting the air cylinder; 22. ejecting out the cylinder; 23. a top outlet; 24. a cover plate; 25. a handle; 26. a sheet metal part sensor.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Wherein the showings are for the purpose of illustration only and not for the purpose of limiting the same, the same is shown by way of illustration only and not in the form of limitation; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not indicated or implied that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are used only for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms will be understood by those skilled in the art according to the specific circumstances.

In the description of the present invention, unless otherwise explicitly specified or limited, the term "connected" or the like, if appearing to indicate a connection relationship between the components, is to be understood broadly, for example, as being either a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other components or may be in an interactive relationship with one another. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Referring to fig. 1-4, an embodiment of the utility model provides a full-automatic nut welding equipment's automatic feeding sieving mechanism, include: the device comprises a feeding bin 1, a vibration disc 2 and a screening device; throw feed bin 1 and be located one side of vibrations dish 2, the top of throwing feed bin 1 is provided with charge door 3, the one side of throwing feed bin 1 near vibrations dish 2 is provided with discharge gate 4, it is provided with ejection of compact ejecting device to throw 1 bottoms of feed bin, discharge gate 4 is connected with the downward direction passageway 5 of slope, the lower extreme of direction passageway 5 is located the top of vibrations dish 2, the top of vibrations dish 2 is stretched out there is blown down tank 6, the end that stretches out of blown down tank 6 is connected in the sieving mechanism.

Wherein, be provided with the material inductor in the middle of the bottom of vibrations dish 2, the material inductor electricity is connected in ejecting device, lacks behind the panel plate spare material in the middle of vibrations dish 2 bottom, triggers the material inductor, and the material inductor is with signal transmission to ejecting device, and ejecting device pushes up in will throwing the panel plate spare in feed bin 1 drops into vibrations dish 2 from discharge gate 4, realizes automatic feed supplement material loading.

In the technical scheme, the feeding bin 1, the vibration disc 2 and the screening device are arranged in a matching structure, the discharging ejection device is arranged at the bottom of the feeding bin 1, and the vibration disc 2 is respectively connected to the feeding bin 1 and the screening device through the guide channel 5 and the discharging groove 6; when in work, a worker adds sheet metal parts into the feeding bin 1 through the feeding port 3, the vibration disc 2 is started, the ejection device ejects the sheet metal parts in the feeding bin 1 upwards, the ejected sheet metal parts fall out from the discharge port 4, and enters the vibration disc 2 through the guide channel 5, the amplitude device in the vibration disc 2 sends out high-frequency vibration action according to the set value frequency to be used on the metal plate parts, the metal plate parts generate regular jumping under the action of external force, the metal plate parts orderly climb upwards according to the guide in the vibration disc 2, the metal plate parts are orderly arranged and mutually extruded, when the direction or the front and back sides of the metal plate parts do not meet the feeding requirement, the parts are guided to be picked and dropped to the bottom layer of the vibration disc 2 for re-sequencing until the metal plate parts are guided out from the discharge chute 6 and enter a screening device, the screening device detects and screens the metal plate parts, the metal plate parts with inconsistent specifications are screened out, and the qualified metal plate parts enter the next working procedure; thereby realize carrying out the function of material loading screening to the sheet metal component automatically, accurate high-efficient, effectively reduced cost of labor and intensity of labour.

In the embodiment, the screening device comprises a guide rail 7, a positioning mechanism, a side pulling mechanism, a plate hole distance detection mechanism, a spacing mechanism and a bad channel 10, wherein the guide rail 7 is obliquely fixed, the upstream end of the guide rail 7 is positioned below the extending end of the discharge chute 6, rollers 8 are distributed on the guide rail 7 in parallel along the length direction of the guide rail 7, baffles 9 are arranged on two sides above the guide rail 7, the baffles 9 on two sides are respectively provided with opposite notches, the side pulling mechanism is arranged above the guide rail 7 and positioned at the notches on two sides, the sheet metal part hole distance detection mechanism is arranged below the guide rail 7 and positioned between the notches on two sides, the positioning mechanism is arranged above the guide rail 7 and positioned at the downstream end of the notches on two sides, the blocking mechanism is arranged above the guide rail 7 and positioned at the upstream end of the notches on two sides, the material receiving port 11 is arranged above the bad channel 10, and the material receiving port 11 is positioned below one of the notches on two sides;

the side pulling mechanism is used for pulling the metal plate out of the poor channel 10 from the side, the hole distance detection mechanism is used for detecting the hole distances of the two sides of the metal plate, the positioning mechanism is used for positioning the metal plate between the notches of the two sides, and the blocking mechanism is used for blocking the next metal plate from entering the notches of the two sides. The design of the structural scheme enables the screening device to automatically detect the sheet metal parts with inconsistent hole pitches and screen out the sheet metal parts to the bad channel 10.

In some embodiments, the side pull mechanism comprises: the side pull air cylinder 12, the clamp plate 13 and two side pull plates 14, two side pull plates 14 are located the breach department of both sides respectively, and clamp plate 13 is fixed connection respectively in two side pull plates 14 and is located the top between two side pull plates 14, and side pull air cylinder 12 is fixed in one side of guided way 7, and the piston rod fixed connection of side pull air cylinder 12 is in one of them side pull plate 14. The design of the structural scheme enables the side-pulling air cylinder 12 to drive the two side-pulling plates 14 to move towards the side, so that the sheet metal parts positioned between the gaps are pulled out from the side of the guide rail 7 and fall into the bad channel 10, and the function of automatically screening the sheet metal parts from the gaps of the guide rail 7 into the bad channel 10 is realized

In some embodiments, the sheet metal component pitch detection mechanism comprises: the detection device comprises detection cylinders 15 and detection heads 16, the number of the detection cylinders 15 is equal to the number of holes of the metal plate, the detection cylinders 15 are fixed below the guide rails 7, the detection cylinders 15 vertically face the guide rails 7, the detection heads 16 are fixed at the tail ends of piston rods of the detection cylinders 15, through holes are formed in positions, right opposite to the guide rails 7 and the detection heads 16, the distance between the detection heads 16 is equal to the distance between holes of the metal plate, a metal plate sensor 26 is arranged on the inner side surface of one side pull plate 14, and the height of the metal plate sensor 26 is higher than the height of the upper surface of the metal plate when the metal plate is on the guide rails 7. When the metal plate piece enters the gap between the two sides of the guide rail 7, the detection cylinder 15 drives the detection head 16 to move upwards, when the metal plate piece meets the specification, the detection head 16 can penetrate into the hole of the metal plate piece, the metal plate piece cannot be jacked up, the metal plate piece sensor 26 cannot be triggered, and the metal plate piece is qualified; when the specification of the metal plate is not met, namely the size or the hole distance of the metal plate is not met, the detection head 16 can jack up the metal plate, so that the metal plate sensor 26 is triggered, and the metal plate is unqualified; therefore, the function of automatically detecting whether the plate is qualified or not is realized.

In some embodiments, the positioning mechanism includes a positioning block 17 and a positioning cylinder 18, the positioning cylinder 18 is fixed above the guide rail 7, the positioning cylinder 18 faces the guide rail 7 vertically, the positioning block 17 is fixed at the end of the piston rod of the positioning cylinder 18, and the positioning block 17 is located between the downstream ends of the notches on both sides. The positioning block 17 is used for blocking the metal plate between the notches at the two sides and preventing the metal plate from continuously sliding downwards, so that the positioning function is achieved, and the accuracy of detection of the hole distance detection mechanism of the metal plate is guaranteed.

In some embodiments, the blocking mechanism comprises: the baffle cylinder 20 is transversely fixed on one side of the guide rail 7, the baffle cylinder 20 vertically faces the guide rail 7, the baffle rod 19 is fixedly connected to the tail end of the baffle cylinder 20, and the baffle rod 19 is transversely located between the upstream ends of the notches on the two sides. The blocking rod 19 is used for blocking the lower metal plate piece from entering the gaps on the two sides, so that the influence on the detection structure of the upper metal plate piece is avoided, and the detection and screening of the screening device are orderly performed one by one.

In some embodiments, the device further comprises an adjusting cylinder 21, the adjusting cylinder 21 is fixed below the guide rail 7, the adjusting cylinder 21 is parallel to the guide rail 7, and one of the detecting cylinders 15 is fixedly connected to a piston rod of the adjusting cylinder 21. The adjusting cylinder 21 is used for adjusting the distance between the detecting cylinders 15, so that the distance between the detecting heads 16 can be adjusted, the distance between the detecting heads 16 can be correspondingly adjusted according to different hole pitches of the processed sheet metal parts, and the application range is wide.

In some embodiments, the outfeed ejector comprises: the ejection device comprises an ejection cylinder 22 and an ejection block, wherein an ejection outlet 23 is formed in the bottom of the feeding bin 1 close to the discharge port 4, the ejection cylinder 22 is vertically fixed below the feeding bin 1, the ejection cylinder 22 is aligned with the ejection outlet 23, the ejection block is fixed on a piston rod of the ejection cylinder 22 and matched with the ejection outlet 23, and the upper surface of the ejection block is an inclined surface obliquely aligned with one side of the discharge port 4. The design of the structural scheme ensures that the ejection block can eject the metal plate in the feeding bin 1 from the discharge port 4, and the structure is simple.

In some embodiments, the bottom of the feeding bin 1 is an inverted frustum structure with an opening gradually shrinking toward the ejection opening 23. The design of the structural scheme enables the sheet metal parts to be automatically collected to the top outlet 23 under the action of gravity, and the ejection block is convenient to eject the sheet metal parts out of the feeding bin 1.

In some embodiments, a cover plate 24 is disposed above the material inlet 3, one side of the cover plate 24 is rotatably connected to one side of the material inlet 3, and a handle 25 is disposed on the cover plate 24. The cover plate 24 can effectively prevent the metal plate from jumping out of the feed opening 3 in the ejection process, and the cover plate 24 is simple and convenient to open and close, so that the workers can feed materials into the feed bin 1 conveniently.

It should be understood that the above-described embodiments are only preferred embodiments of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that various modifications, equivalents, changes, and the like can be made to the present invention. However, these modifications are within the scope of the present invention as long as they do not depart from the spirit of the present invention. In addition, certain terms used in the specification and claims of the present application are not limiting, but are used merely for convenience of description.

Claims

1. The utility model provides a full-automatic nut welding equipment's automatic feeding sieving mechanism which characterized in that includes: the device comprises a feeding bin (1), a vibration disc (2) and a screening device; throw feed bin (1) and be located one side of vibrations dish (2), the top of throwing feed bin (1) is provided with charge door (3), it is close to throw feed bin (1) one side of vibrations dish (2) is provided with discharge gate (4), it is provided with ejection of compact ejecting device to throw feed bin (1) bottom, discharge gate (4) are connected with slant decurrent guide way (5), the lower extreme of guide way (5) is located the top of vibrations dish (2), the top of vibrations dish (2) has stretched out blown down tank (6), the end that stretches out of blown down tank (6) connect in sieving mechanism.

2. The automatic feeding screening device of the full-automatic nut welding equipment according to claim 1, characterized in that the screening device comprises a guide rail (7), a positioning mechanism, a side pulling mechanism, a plate member pitch detection mechanism, a blocking mechanism and a defective passage (10), wherein the guide rail (7) is obliquely fixed, an upstream end of the guide rail (7) is positioned below an extending end of the discharge chute (6), a plurality of rollers (8) are distributed on the guide rail (7) in parallel along the length direction of the guide rail, the two sides above the guide rail (7) are provided with baffles (9), the baffles (9) at the two sides are respectively provided with opposite notches, the side pulling mechanism is arranged above the guide rail (7) and positioned at the notches at the two sides, the plate member pitch detection mechanism is arranged below the guide rail (7) and positioned between the notches at the two sides, the positioning mechanism is arranged above the guide rail (7) and positioned at the downstream ends of the notches at the two sides, the blocking mechanism is arranged above the guide rail (7) and positioned at the upstream ends of the notches at the two sides, the material receiving port (11) is arranged above the bad channel (10), and the material receiving port (11) is positioned below one of the notches at the two sides;

the side pulling mechanism is used for pulling the metal plate out of the bad channel (10) from the side, the hole distance detection mechanism is used for detecting the hole distances of the two sides of the metal plate, the positioning mechanism is used for positioning the metal plate between the notches of the two sides, and the blocking mechanism is used for blocking the next metal plate from entering the notches of the two sides.

3. The automatic feeding and screening device of the full-automatic nut welding equipment according to claim 2, wherein the side pulling mechanism comprises: side draw cylinder (12), clamp plate (13) and two side arm-tie (14), two side arm-tie (14) are located both sides respectively breach department, clamp plate (13) fixed connection respectively in two side arm-tie (14) and be located two top between side arm-tie (14), side draw cylinder (12) are fixed in one side of guided way (7), just the piston rod fixed connection of side draw cylinder (12) is in one of them side arm-tie (14).

4. The automatic feeding and screening device of the full-automatic nut welding equipment according to claim 3, wherein the plate member pitch detection mechanism comprises: the device comprises detection cylinders (15) and detection heads (16), wherein the number of the detection cylinders (15) is equal to the number of holes of the metal plate, the detection cylinders (15) are fixed below the guide rails (7), the detection cylinders (15) vertically face the guide rails (7), the detection heads (16) are fixed at the tail ends of piston rods of the detection cylinders (15), through holes are formed in positions, opposite to the guide rails (7) and the detection heads (16), of the guide rails, the distance between the detection heads (16) is equal to the distance between holes of the metal plate, a metal plate sensor (26) is arranged on the inner side face of one side pull plate, and the height of the metal plate sensor (26) is higher than the height of the upper surface of the metal plate when the guide rails (7) are located.

5. The automatic feeding and screening device of the full-automatic nut welding equipment according to claim 4, characterized in that the positioning mechanism comprises a positioning block (17) and a positioning cylinder (18), the positioning cylinder (18) is fixed above the guide rail (7), the positioning cylinder (18) faces the guide rail (7) vertically, the positioning block (17) is fixed at the end of a piston rod of the positioning cylinder (18), and the positioning block (17) is located between the downstream ends of the notches at the two sides.

6. The automatic feeding and screening device of the full-automatic nut welding equipment according to claim 5, wherein the blocking mechanism comprises: keep off pin (19) and keep off cylinder (20), keep off cylinder (20) horizontal fixation in one side of guided way (7), just keep off cylinder (20) perpendicular orientation guided way (7), keep off pin (19) fixed connection in keep off the end of cylinder (20), keep off pin (19) horizontal both sides of being located between the upstream end of breach.

7. The automatic feeding and screening device of the full-automatic nut welding equipment according to claim 4, characterized by further comprising an adjusting cylinder (21), wherein the adjusting cylinder (21) is fixed below the guide rail (7), the adjusting cylinder (21) is parallel to the guide rail (7), and one of the detecting cylinders (15) is fixedly connected to a piston rod of the adjusting cylinder (21).

8. The automatic feeding and screening device of the full-automatic nut welding equipment according to claim 1, wherein the discharging and ejecting device comprises: the ejection device comprises an ejection cylinder (22) and an ejection block, wherein the bottom of the feeding bin (1) is close to the ejection outlet (23) of the discharge port (4), the ejection cylinder (22) is vertically fixed below the feeding bin (1), the ejection cylinder (22) is right opposite to the ejection outlet (23), the ejection block is fixed on a piston rod of the ejection cylinder (22), the ejection block is matched with the ejection outlet (23), and the upper surface of the ejection block is obliquely opposite to the inclined surface on one side of the discharge port (4).

9. The automatic feeding and screening device of the full-automatic nut welding equipment according to claim 8, characterized in that the bottom of the feeding bin (1) is an inverted frustum structure with an opening gradually shrinking to the top outlet (23).

10. The automatic feeding and screening device of the full-automatic nut welding equipment according to claim 1, characterized in that a cover plate (24) is arranged above the feed opening (3), one side of the cover plate (24) is rotatably connected to one side of the feed opening (3), and a handle (25) is arranged on the cover plate (24).