CN215902907U

CN215902907U - Square pipe inner chamber nut automatic feeding and welding set

Info

Publication number: CN215902907U
Application number: CN202122114398.XU
Authority: CN
Inventors: 朱忆玺
Original assignee: Shandong Meifeng Intelligent Equipment Co ltd
Current assignee: Shandong Meifeng Intelligent Equipment Co ltd
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2022-02-25
Anticipated expiration: 2031-09-03

Abstract

The utility model belongs to the technical field of electromechanical automation, and particularly relates to an automatic feeding and welding device for nuts in inner cavities of square tubes, which comprises an electric resistance welding machine, a conveying mechanism, a nut mounting mechanism and a feeding mechanism, wherein the conveying mechanism comprises supporting legs, a first cross beam, a connecting seat, a lead screw, a motor, a guide rail, a discharging plate, a supporting plate, a welding groove, a front slide block, a support, a rear slide block, a first air cylinder, a U-shaped plate and a push plate, the nut mounting mechanism comprises a first base, a top seat, a feeding vibration disc, a discharging pipe, a transverse pipe, a sliding rod, a second air cylinder, a mounting plate, a second hydraulic cylinder, a pressing block and a proximity switch, the feeding mechanism comprises a second base, a supporting column, a square tube storage tank, a discharging groove, a second cross beam, a third air cylinder and a vibrating plate, and the welding automation of the nuts in the square tubes is realized through the cooperation of the electric resistance welding machine, the conveying mechanism, the nut mounting mechanism and the feeding mechanism, greatly improving the welding efficiency and the welding quality.

Description

Square pipe inner chamber nut automatic feeding and welding set

Technical Field

The utility model belongs to the technical field of electromechanical automation, and particularly relates to an automatic feeding and welding device for a nut in an inner cavity of a square tube.

Background

The internal weld nut at the square tube both ends often need to come the adapter bolt to use at the machining kind, and traditional manual welding's mode is inefficient, and welding quality is not unified, moreover unable large-scale production.

SUMMERY OF THE UTILITY MODEL

The internal weld nut at the square tube both ends often need to come the adapter bolt to use at the machining kind, and traditional manual welding's mode is inefficient, and welding quality is not unified, moreover unable large-scale production. The utility model provides an automatic feeding and welding device for nuts in inner cavities of square pipes, which realizes the automation of welding of nuts in the square pipes by using a resistance welding machine, a conveying mechanism, a nut mounting mechanism and a feeding mechanism in a matched manner, and greatly improves the welding efficiency and the welding quality.

The utility model provides the following technical scheme: an automatic feeding and welding device for nuts in inner cavities of square tubes comprises a resistance welding machine, a conveying mechanism, a nut mounting mechanism and a feeding mechanism, wherein the resistance welding machine comprises a machine body, an upper support arm, a lower support arm, a first hydraulic cylinder, an upper electrode and a lower electrode, the machine body is divided into two parts and is respectively mounted on the left side and the right side of the conveying mechanism, the side, facing the conveying mechanism, of the machine body is fixedly provided with the upper support arm and the lower support arm, one end of the upper support arm is fixedly provided with the first hydraulic cylinder, the bottom end of a piston rod of the first hydraulic cylinder is fixedly provided with the upper electrode, the top surface of the lower support arm is fixedly provided with the lower electrode, the conveying mechanism comprises a support leg, a first cross beam, a connecting seat, a lead screw, a motor, a guide rail, a discharging plate, a supporting plate, a welding groove, a first front slide block, a support, a rear slide block, a first cylinder, a U-shaped plate and a push plate, the rear end face of the support leg is fixedly provided with the first cross beam, the nut mounting mechanism comprises a first base, a top seat, a feeding vibrating disk, a discharging pipe, a transverse pipe, a sliding rod, a second cylinder, a mounting plate, a second hydraulic cylinder, a pressing block and a proximity switch, wherein the first base is two and is respectively mounted on the left side and the right side of a conveying mechanism, the feeding mechanism comprises a second base, a pillar, a square tube storage tank, a discharging tank, a second beam, a third cylinder and a vibrating plate, wherein the top surface of the first base is fixedly provided with a feeding vibrating disk through a top seat, the bottom end of a discharging tube arranged on the feeding vibrating disk is fixedly connected with a transverse tube, one end of a sliding rod which is slidably arranged in the transverse tube is fixedly connected with one end of a piston rod of the second cylinder, the top surface of the top seat is fixedly provided with a mounting plate, the bottom end of a piston rod of the second cylinder which is fixedly arranged on the mounting plate is fixedly provided with a pressing block, the side surface of the first base is fixedly provided with a proximity switch, the feeding mechanism comprises a second base, a pillar, a square tube storage tank, a discharging tank, a second beam, a third cylinder and a vibrating plate, the two bases are respectively arranged at the left side and the right side of the conveying mechanism, the top surface of the second base is fixedly provided with a pillar, the bottom surface of the square tube storage tank is fixedly connected with the top end of the pillar, the bottom of the front end face of the discharging groove is provided with a discharging groove, the rear end face of the second base is fixedly provided with a second cross beam, the rear end of the top face of the supporting plate is fixedly provided with a third air cylinder, and the top end of a piston rod of the third air cylinder is fixedly provided with a vibrating plate.

The longitudinal section of the square tube storage tank is of an L-shaped structure, the front end of the square tube storage tank is low, the rear end of the square tube storage tank is high, the vertical distance between the opposite inner sides of the square tube storage tanks mounted on the two bases II is equal to the inner width of a discharging groove, the inner width of the discharging groove is greater than the length of the square tube by 1-5 mm, the length of the discharging groove is greater than the width/height of the square tube by 1-5 mm, the width of the discharging groove is equal to the inner width of the discharging groove, and the height of the discharging groove is equal to the length of the discharging groove; the feeding mechanism can be used under the matching of the conveying mechanism, so that the square tubes placed on the square tube storage tank are orderly fed.

The square tube storage tank vertically above the vibrating plate is provided with a through groove with the length and width not less than that of the vibrating plate in a penetrating manner, the vibrating plate is of an angle iron structure, and the top surface of the vertical surface of the vibrating plate is parallel to the top surface of the square tube storage tank; the vibration board can reciprocate under the drive of cylinder three and go up and down to the square pipe motion in the square pipe storage tank of drive avoids between a plurality of square pipes because of frictional force takes place the putty.

The motor is fixedly arranged on the top surface of the second cross beam, the rear end of the guide rail is fixedly arranged on the top surface of the second cross beam on one side of the motor, the front sliding block and the rear sliding block are identical in structure size, the front sliding block and the rear sliding block are respectively provided with an internal thread through hole in threaded connection with a lead screw and a sliding groove in sliding connection with the guide rail, and the rear end of the bottom surface of the supporting plate is fixedly connected with the top surface of the second base; the motor can drive the front sliding block and the rear sliding block to stably move back and forth on the guide rail through the lead screw, and the device can automatically load and unload materials to achieve the effect of power output.

The front end and the rear end of the bracket are vertically communicated with a groove body which is matched with a first air cylinder and used for a piston rod to move, when the piston rod of the first air cylinder contracts to a minimum stroke, the top surface of the push plate is not higher than that of the support plate, and the proximity switch is electrically connected with an electromagnetic valve and a motor of the first air cylinder through a relay; the proximity switch can control the running state of the motor and the opening and closing state of the cylinder valve when the rear sliding block and the front sliding block are detected, so that automatic intermittent loading and unloading are realized.

The discharging plate is of an inclined plate structure with the front end lower than the rear end; the square tube with the welded nut can slide along the top surface of the discharging plate when being pushed to the front side of the supporting plate by the push plate on one side of the front sliding block, so that materials can be conveniently collected.

The axial line of the nut at the bottom of the blanking pipe is the same as the extending direction of the axial line of the second cylinder, the second cylinder is fixedly mounted on the top surface of the first base, when a piston rod of the second cylinder contracts to a minimum stroke, one end, back to the second cylinder, of the sliding rod does not fall off the inner side of the transverse pipe, the inner wall of the transverse pipe is in sliding connection with the side surface of the nut, and the proximity switch is electrically connected with the electromagnetic valve of the second cylinder; the second cylinder can push the nuts conveyed by the blanking pipe to the two ends of the square pipe through the sliding rod when stretching, and the square pipe and the nuts are assembled together automatically.

The pressing block is of a cuboid structure with a smooth bottom surface, the center of the bottom surface of the pressing block is located on a vertical plane where an axis extension line of a piston rod of the second air cylinder is located, and the proximity switch is electrically connected with an electromagnetic valve of the second hydraulic cylinder; the second hydraulic cylinder can drive the pressing block to extrude the square pipe provided with the nut when being extended, so that the inner wall of the square pipe is tightly attached to the outer side surface of the nut, and the stability of subsequent welding is ensured.

The lower electrode vertically passes through the inner side of the welding groove, and the proximity switch is electrically connected with the electromagnetic valve of the first hydraulic cylinder; the electric resistance welding machine can carry out final automatic welding on the assembled nut and square tube, and automatic operation of the whole process is realized.

The utility model has the beneficial effects that: the feeding mechanism can be used under the cooperation of the conveying mechanism, so that the square tubes placed on the square tube storage tank are sequentially fed; the vibrating plate can be driven by the cylinder III to reciprocate to lift, so that the square tubes in the square tube storage tank are driven to move, and material blockage among the square tubes due to friction is avoided; the motor can drive the front sliding block and the rear sliding block to stably move back and forth on the guide rail through the lead screw, so that the device can automatically load and unload materials to play a role in power output; the proximity switch can control the running state of the motor and the opening and closing state of the cylinder-valve when the rear sliding block and the front sliding block are detected, so that automatic intermittent loading and unloading are realized; when the square tube with the welded nut is pushed to the front side of the supporting plate by the push plate on one side of the front sliding block, the square tube can slide along the top surface of the discharging plate, so that materials can be conveniently collected; when the cylinder II stretches, the nuts conveyed by the discharging pipe can be pushed to the inner parts of the two ends of the square pipe through the sliding rod, and the square pipe and the nuts are automatically assembled together; when the hydraulic cylinder II extends, the pressing block can be driven to extrude the square tube provided with the nut, so that the inner wall of the square tube is tightly attached to the outer side surface of the nut, and the stability of subsequent welding is ensured; the electric resistance welding machine can carry out final automatic welding on the assembled nut and square tube, and automatic operation of the whole process is realized.

The parts of the device not involved are the same as or can be implemented using prior art.

Drawings

FIG. 1 is a schematic cross-sectional view of a square tube nut;

FIG. 2 is a schematic structural view of the present invention;

FIG. 3 is a schematic structural view of a resistance welding machine according to the present invention;

FIG. 4 is a schematic structural view of a conveying mechanism according to the present invention;

FIG. 5 is a schematic structural view of a nut mounting mechanism according to the present invention;

FIG. 6 is a schematic structural view of a feeding mechanism according to the present invention;

in the figure: 1. a resistance welding machine; 101. a body; 102. an upper support arm; 103. a lower support arm; 104. a first hydraulic cylinder; 105. an upper electrode; 106. a lower electrode; 2. a conveying mechanism; 201. a support leg; 202. a first cross beam; 203. a connecting seat; 204. a lead screw; 205. a motor; 206. a guide rail; 207. a stripper plate; 208. a support plate; 209. welding a groove; 210. a front slider; 211. a support; 212. a rear slider; 213. a first cylinder; 214. a U-shaped plate; 215. pushing the plate; 3. a nut mounting mechanism; 301. a first base; 302. a top seat; 303. feeding a vibrating disk; 304. a discharging pipe; 305. a transverse tube; 306. a slide bar; 307. a second air cylinder; 308. mounting a plate; 309. a second hydraulic cylinder; 310. briquetting; 311. a proximity switch; 4. a feeding mechanism; 401. a second base; 402. a pillar; 403. a square tube storage tank; 404. a discharging groove; 405. a discharge chute; 406. a second cross beam; 407. a third air cylinder; 408. a vibrating plate.

Detailed Description

Referring to fig. 1-6, the present invention provides the following technical solutions: an automatic feeding and welding device for nuts in inner cavities of square pipes comprises a resistance welding machine 1, a conveying mechanism 2, a nut mounting mechanism 3 and a feeding mechanism 4, wherein the resistance welding machine 1 comprises a machine body 101, an upper support arm 102, a lower support arm 103, a hydraulic cylinder I104, an upper electrode 105 and a lower electrode 106, the two machine bodies 101 are respectively mounted on the left side and the right side of the conveying mechanism 2, the upper support arm 102 and the lower support arm 103 are fixedly mounted on the side face, facing the conveying mechanism 2, of the machine body 101, the hydraulic cylinder I104 is fixedly mounted at one end of the upper support arm 102, the upper electrode 105 is fixedly mounted at the bottom end of a piston rod of the hydraulic cylinder I104, the lower electrode 106 is fixedly mounted on the top face of the lower support arm 103, the conveying mechanism 2 comprises support legs 201, a cross beam I202, a connecting seat 203, a lead screw 204, a motor 205, a guide rail 206, a discharging plate 207, a supporting plate 208 and a welding groove 209, The lifting device comprises a front sliding block 210, a support 211, a rear sliding block 212, a first cylinder 213, a U-shaped plate 214 and a push plate 215, wherein a first beam 202 is fixedly installed on the rear end surface of a supporting leg 201, a connecting seat 203 and a guide rail 206 are fixedly installed on the top surface of the first beam 202, the connecting seat 203 is rotatably connected with the front end of a lead screw 204, the rear end of the lead screw 204 is fixedly connected with an output shaft of a motor 205, a discharging plate 207 is arranged above the supporting leg 201, the discharging plate 207 is fixedly connected with the front end of the bottom surface of a supporting plate 208, a welding groove 209 is formed in the front side of the supporting plate 208, the front sliding block 210 and the rear sliding block 212 are slidably installed on the guide rail 206, the supports 211 are fixedly installed on the top surfaces of the front sliding block 210 and the rear sliding block 212, the first cylinder 213 is fixedly installed at the front and rear ends of the bottom surface of the supports 211, the top end of a piston rod of the first cylinder 213 is fixedly connected with the bottom surface of the U-shaped plate 214, the top surface of the U-shaped plate 214 is fixedly connected with the push plate 215, nut installation mechanism 3 includes that base 301, footstock 302, pay-off vibration dish 303, unloading pipe 304, violently manage 305, slide bar 306, two 307 of cylinders, mounting panel 308, pneumatic cylinder two 309, briquetting 310, proximity switch 311, the quantity of base 301 is two and installs respectively in the left and right sides of conveying mechanism 2, the top surface of base 301 has pay-off vibration dish 303 through footstock 302 fixed mounting, the bottom fixedly connected with of the unloading pipe 304 of installation on the pay-off vibration dish 303 violently manages 305, violently manage the one end of the piston rod of the one end fixed connection cylinder two 307 of slidable mounting's slide bar 306 in 305, the top surface fixed mounting of footstock 302 has mounting panel 308, the bottom fixed mounting of the piston rod of two 309 of fixed mounting's pneumatic cylinder on mounting panel 308 has briquetting 310, the side fixed mounting of base 301 has proximity switch 311, feed mechanism 4 includes two 401 of base, the, Pillar 402, square pipe storage tank 403, lower silo 404, blown down tank 405, two 406 on the crossbeam, three 407 in cylinder, vibration board 408, two 401 in bases's quantity is two and installs respectively in conveying mechanism 2's the left and right sides, two 401 in bases's top surface fixed mounting has pillar 402, the bottom surface of the square pipe storage tank 403 of top fixed connection of pillar 402, the front end of square pipe storage tank 403 is equipped with blown down tank 404, blown down tank 405 has been seted up to the bottom of the preceding terminal surface of blown down tank 404, two 401 in bases's rear end face fixed mounting has two 406 on the crossbeam, the rear end fixed mounting of backup pad 208 top surface has three 407 in cylinder, the piston rod top fixed mounting of three 407 in cylinder has vibration board 408.

The longitudinal section of the square tube storage tank 403 is of an L-shaped structure, the front end of the square tube storage tank 403 is low, the rear end of the square tube storage tank 403 is high, the vertical distance between the opposite inner sides of the square tube storage tanks 403 arranged on the two bases 401 is equal to the inner width of the discharging tank 404, the inner width of the discharging tank 404 is greater than the length of the square tube by 1-5 mm, the length of the discharging tank 404 is greater than the width/height of the square tube by 1-5 mm, the width of the discharging tank 405 is equal to the inner width of the discharging tank 404, and the height of the discharging tank 405 is equal to the length of the discharging tank 404; the feeding mechanism 4 can be used in cooperation with the conveying mechanism 2 to sequentially feed the square tubes placed on the square tube storage tank 403.

A through groove with the length and width not less than that of the vibration plate 408 is formed in the square pipe storage tank 403 vertically above the vibration plate 408 in a penetrating manner, the vibration plate 408 is of an angle iron structure, and the top surface of the vertical surface of the vibration plate 408 is parallel to the top surface of the square pipe storage tank 403; the vibrating plate 408 can be driven by the cylinder three 407 to reciprocate, so that the square tube in the square tube storage tank 403 is driven to move, and material blockage caused by friction force among the square tubes is avoided.

The motor 205 is fixedly installed on the top surface of the second cross beam 406, the rear end of the guide rail 206 is fixedly installed on the top surface of the second cross beam 406 on one side of the motor 205, the front slider 210 and the rear slider 212 are identical in structure size, the front slider 210 and the rear slider 212 are both provided with an internal thread through hole in threaded connection with the lead screw 204 and a sliding groove in sliding connection with the guide rail 206, and the rear end of the bottom surface of the support plate 208 is fixedly connected with the top surface of the second base 401; the motor 205 can drive the front slider 210 and the rear slider 212 to stably move back and forth on the guide rail 206 through the lead screw 204, and the function of power output is achieved for the device to automatically load and unload materials.

The front end and the rear end of the bracket 211 are vertically communicated with a groove body which is matched with a piston rod of a first cylinder 213 to move, when the piston rod of the first cylinder 213 contracts to a minimum stroke, the top surface of the push plate 215 is not higher than that of the supporting plate 208, and the proximity switch 311 is electrically connected with the electromagnetic valve of the first cylinder 213 and the motor 205 through a relay; the proximity switch 311 can control the running state of the motor 205 and the opening and closing state of the first cylinder 213 valve when the rear slider 212 and the front slider 210 are detected, so that automatic intermittent loading and unloading can be realized.

The discharge plate 207 is of an inclined plate structure with the front end lower than the rear end; the square tube with the welded nut can slide along the top surface of the discharging plate 207 when being pushed to the front side of the supporting plate 208 by the pushing plate 215 on one side of the front sliding block 210, so that the materials can be conveniently collected.

The axial line of the nut at the bottom of the blanking pipe 304 is the same as the extending direction of the axial line of the second air cylinder 307, the second air cylinder 307 is fixedly installed on the top surface of the first base 301, when the piston rod of the second air cylinder 307 contracts to the minimum stroke, one end, back to the second air cylinder 307, of the sliding rod 306 does not fall out of the inner side of the transverse pipe 305, the inner wall of the transverse pipe 305 is in sliding connection with the side surface of the nut, and the proximity switch 311 is electrically connected with the electromagnetic valve of the second air cylinder 307; when the second air cylinder 307 is stretched, the nuts conveyed by the feeding pipe 304 can be pushed to the two ends of the square pipe through the sliding rod 306, and the square pipe and the nuts are automatically assembled together.

The pressing block 310 is of a cuboid structure with a smooth bottom surface, the center of the bottom surface of the pressing block 310 is located on a vertical plane where an axis extending line of a piston rod of the second air cylinder 307 is located, and the proximity switch 311 is electrically connected with the electromagnetic valve of the second hydraulic cylinder 309; when the second hydraulic cylinder 309 extends, the pressing block 310 can be driven to extrude the square tube provided with the nut, so that the inner wall of the square tube is tightly attached to the outer side surface of the nut, and the stability of follow-up welding is ensured.

The lower electrode 106 vertically passes through the inner side of the welding groove 209, and the proximity switch 311 is electrically connected with the electromagnetic valve of the first hydraulic cylinder 104; the electric resistance welding machine 1 can carry out final automatic welding on the assembled nut and square tube, and realizes the automatic operation of the whole process.

The working principle and the using process of the utility model are as follows: when the device works, the feeding vibration disc 303 conveys nuts into the blanking pipe 304, the extending direction of the axis of the nut at the bottom of the blanking pipe 304 is the same as that of the axis of the second air cylinder 307, when the device is in an initial state, the push plate 215 on one side of the rear sliding block 212 is positioned on the rear side of the discharge chute 405, after the device is started, the piston rod of the first air cylinder 213 extends out, the motor 205 works to drive the lead screw 204 to rotate, further the front sliding block 210 and the rear sliding block 212 drive the bracket 211 to move towards the electric resistance welding machine 1, at the moment, the push plate 215 on one side of the rear sliding block 212 pushes out the square tube at the lowest part of the discharge chute 404 from the discharge chute 405 and slides forwards along the top surface of the supporting plate 208, when the proximity switch 311 detects the rear sliding block 212, the piston rod of the first air cylinder 213 contracts to the minimum stroke, and then the motor 205 rotates reversely, so that the conveying mechanism 2 is reset integrally; when the proximity switch 311 detects that the rear slider 212 is extended, the piston rod of the second air cylinder 307 drives the sliding rod 306 to slide and push out a nut at the lowest end of the discharging pipe 304, so that the nut moves into the inner sides of the two ends of the square pipe, then the second air cylinder 307 is reset, the piston rod of the second hydraulic cylinder 309 is extended, the pressing block 310 is driven to press the two ends of the square pipe downwards, the inner wall of the square pipe is tightly attached to the outer side surface of the nut, and then the second hydraulic cylinder 309 is reset; controlling the rotating speed of the setting motor 205, and pushing the push plate 215 on one side of the rear slide block 212 to push a new square tube to move below the nut mounting mechanism 3 again when the hydraulic cylinder II 309 is reset; in the second and subsequent movements of the conveying mechanism 2, the push plate 215 on one side of the front slider 210 can push the square tube with the assembled nut to the upper part of the lower electrode 106, and the piston rod of the hydraulic cylinder one 104 is extended to perform resistance welding work while the nut mounting mechanism 3 works, so that the automatic welding work of the pipeline and the nut is completed; in the next working stroke of the conveying mechanism 2, the square tube processed by the nut mounting mechanism 3 is conveyed by the conveying mechanism 2 to eject the welded square tube positioned at the electric resistance welding machine 1, so that the welded square tube rolls down along the stripper plate 207.

Claims

1. The utility model provides a square pipe inner chamber nut automatic feeding and welding set which characterized in that: the welding machine comprises a resistance welding machine body, an upper support arm, a lower support arm, a first hydraulic cylinder, an upper electrode and a lower electrode, wherein the number of the machine body is two, the two machine bodies are respectively arranged at the left side and the right side of the conveying mechanism, the side surface of the machine body facing the conveying mechanism is fixedly provided with the upper support arm and the lower support arm, one end of the upper support arm is fixedly provided with the first hydraulic cylinder, the bottom end of a piston rod of the first hydraulic cylinder is fixedly provided with the upper electrode, the top surface of the lower support arm is fixedly provided with the lower electrode, the conveying mechanism comprises a support leg, a first cross beam, a connecting seat, a lead screw, a motor, a guide rail, a discharge plate, a support plate, a welding groove, a front slide block, a support, a rear slide block, a first cylinder, a U-shaped plate and a push plate, the rear end surface of the support leg is fixedly provided with the first cross beam, and the top surface of the first cross beam is fixedly provided with the connecting seat and the guide rail, the nut mounting mechanism comprises a first base, a top seat, a feeding vibration disc, a discharging pipe, a transverse pipe, a sliding rod, a second air cylinder, a mounting plate, a second hydraulic cylinder, a pressing block and a proximity switch, wherein the first base is two in number and is respectively mounted at the left side and the right side of the conveying mechanism, the feeding mechanism comprises a second base, a pillar, a square tube storage tank, a discharging tank, a second beam, a third cylinder and a vibrating plate, wherein the top surface of the first base is fixedly provided with a feeding vibrating disk through a top seat, the bottom end of a discharging tube arranged on the feeding vibrating disk is fixedly connected with a transverse tube, one end of a sliding rod which is slidably arranged in the transverse tube is fixedly connected with one end of a piston rod of the second cylinder, the top surface of the top seat is fixedly provided with a mounting plate, the bottom end of a piston rod of the second cylinder which is fixedly arranged on the mounting plate is fixedly provided with a pressing block, the side surface of the first base is fixedly provided with a proximity switch, the feeding mechanism comprises a second base, a pillar, a square tube storage tank, a discharging tank, a second beam, a third cylinder and a vibrating plate, the two bases are respectively arranged at the left side and the right side of the conveying mechanism, the top surface of the second base is fixedly provided with a pillar, the bottom surface of the square tube storage tank is fixedly connected with the top end of the pillar, the bottom of the front end face of the discharging groove is provided with a discharging groove, the rear end face of the second base is fixedly provided with a second cross beam, the rear end of the top face of the supporting plate is fixedly provided with a third air cylinder, and the top end of a piston rod of the third air cylinder is fixedly provided with a vibrating plate.

2. The automatic feeding and welding device for the square tube inner cavity nut as claimed in claim 1, wherein: the longitudinal section of square pipe storage tank is L type structure, the front end of square pipe storage tank is low and the rear end is high, two perpendicular distance between the square pipe storage tank of installation on the base two medial surfaces in opposite directions equals the interior width of silo down, the interior width of silo is greater than the length 1-5 mm of square pipe down, the length of silo is greater than the width/height 1-5 mm of square pipe down, the width of blown down tank equals the interior width of silo down, the height of blown down tank equals the length of silo down.

3. The automatic feeding and welding device for the square tube inner cavity nut as claimed in claim 1, wherein: the square tube storage tank vertically above the vibrating plate is provided with a through groove with the length and width not less than that of the vibrating plate in a penetrating mode, the vibrating plate is of an angle iron structure, and the top surface of the vertical surface of the vibrating plate is parallel to the top surface of the square tube storage tank.

4. The automatic feeding and welding device for the square tube inner cavity nut as claimed in claim 1, wherein: the motor is fixedly installed on the top surface of the second cross beam, the rear end of the guide rail is fixedly installed on the top surface of the second cross beam on one side of the motor, the front sliding block and the rear sliding block are identical in structure size, the front sliding block and the rear sliding block are respectively provided with an internal thread through hole in threaded connection with a lead screw and a sliding groove in sliding connection with the guide rail, and the rear end of the bottom surface of the supporting plate is fixedly connected with the top surface of the second base.

5. The automatic feeding and welding device for the square tube inner cavity nut as claimed in claim 1, wherein: the bracket is characterized in that the front end and the rear end of the bracket are vertically communicated with a groove body which is provided with a first adaptive air cylinder and a piston rod of which moves, when the piston rod of the first air cylinder contracts to the minimum stroke, the top surface of the push plate is not higher than that of the support plate, and the proximity switch is electrically connected with the electromagnetic valve and the motor of the first air cylinder through a relay.

6. The automatic feeding and welding device for the square tube inner cavity nut as claimed in claim 1, wherein: the stripper plate is an inclined plate structure with the front end lower than the rear end.

7. The automatic feeding and welding device for the square tube inner cavity nut as claimed in claim 1, wherein: the extension direction of the axis of the nut at the bottom of the blanking pipe is the same as that of the axis of the second cylinder, the second cylinder is fixedly mounted on the top surface of the first base, when a piston rod of the second cylinder contracts to the minimum stroke, one end, back to the second cylinder, of the sliding rod does not fall off the inner side of the transverse pipe, the inner wall of the transverse pipe is in sliding connection with the side surface of the nut, and the proximity switch is electrically connected with the electromagnetic valve of the second cylinder.

8. The automatic feeding and welding device for the square tube inner cavity nut as claimed in claim 1, wherein: the pressing block is of a cuboid structure with a smooth bottom surface, the center of the bottom surface of the pressing block is located on a vertical plane where an axis extending line of a piston rod of the second air cylinder is located, and the proximity switch is electrically connected with the electromagnetic valve of the second hydraulic cylinder.

9. The automatic feeding and welding device for the square tube inner cavity nut as claimed in claim 1, wherein: the lower electrode vertically passes through the inner side of the welding groove, and the proximity switch is electrically connected with the solenoid valve of the first hydraulic cylinder.