CN113059426A

CN113059426A - Polishing device for end part of metal square tube

Info

Publication number: CN113059426A
Application number: CN202110350618.0A
Authority: CN
Inventors: 张晓奎
Original assignee: Shenzhen Xuncheng Technology Co ltd
Current assignee: Shenzhen Xuncheng Technology Co ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-07-02

Abstract

The invention relates to a polishing device for the end part of a metal square tube, which comprises a base, a support rod, a cross rod, a driving mechanism, a conveying mechanism and a polishing mechanism, wherein the polishing device for the end part of the metal square tube realizes the conveying of a workpiece by driving the conveying mechanism to operate through the driving mechanism, and polishes the workpiece through the polishing mechanism. The assembly line processing of the workpiece is facilitated, and the practicability is improved.

Description

Polishing device for end part of metal square tube

Technical Field

The invention relates to a polishing device for the end part of a metal square pipe.

Background

The metal square pipe is a pipe fitting made of metal materials, and when the metal square pipe is used, in order to enable the end portion of the metal square pipe to be smooth and convenient to connect, two ends of the metal square pipe are required to be polished.

The traditional mode of polishing is through artifical handheld abrasive paper, polish the work piece manually, consume great manpower, and efficiency is not high, automatic grinding device has appeared in consequently the market, and current grinding device can only polish the one end of work piece generally once, when polishing the other end of work piece, need the upset work piece, then the work piece just can be realized of moving once more, efficiency is lower, current grinding device is to the conveying of work piece and polish and generally need a plurality of outputs separately to drive simultaneously, energy resource consumption is great.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: in order to overcome the defects of the prior art, the grinding device for the end part of the metal square pipe is provided.

The technical scheme adopted by the invention for solving the technical problems is as follows: a polishing device for the end part of a metal square tube comprises a base, a support rod, a cross rod, a driving mechanism, a conveying mechanism and a polishing mechanism, wherein the cross rod is arranged above the base through the support rod;

the driving mechanism comprises a motor and a driving shaft, the motor is horizontally arranged above the base, and the driving shaft is arranged on the motor;

the transfer mechanism includes transmission assembly, promotion subassembly and runner assembly, transmission assembly includes chain and transmission element, transmission element has two, and two transmission element set up the both sides at the recess respectively, transmission element includes pivot and commentaries on classics gear, the pivot sets up in the recess, change the gear cover and establish in the pivot, change gear and pivot key-type connection, the chain cover is established on two changes gears, and two changes gears pass through chain drive and connect, runner assembly includes first bevel gear, second bevel gear, fixed axle, pinion and gear wheel, first bevel gear cover is established in the drive shaft, first bevel gear and drive shaft key-type connection, the fixed axle sets up the one side at the drive shaft, the second bevel gear cover is established on the fixed axle, second bevel gear and fixed axle key-type connection, second bevel gear and first bevel gear meshing, the small gear is sleeved on the fixed shaft and is in key connection with the fixed shaft, the large gear is sleeved on one of the rotating shafts and is in key connection with the rotating shaft, the large gear is meshed with the small gear, the pushing assemblies are multiple and are uniformly arranged on the chain, each pushing assembly comprises a sleeve, a push rod, a fixture block and a fixing unit, the sleeve is arranged on the chain, one end of the push rod is positioned in the sleeve, the other end of the push rod extends out of the sleeve, the push rod is in sliding connection with the sleeve, the fixture block is arranged at one end of the push rod positioned in the sleeve, a chute is arranged in the sleeve and is parallel to the sleeve, a strip-shaped groove is arranged at the bottom of the chute and is perpendicular to the chute, a clamping groove is arranged at one end of the strip-shaped groove far away from the chute, the fixture, the fixed unit comprises a push block and a first spring, the push block is arranged in the sleeve, the push block is connected with the sleeve in a sliding mode, the push block abuts against the push rod, the first spring is arranged in the sleeve, one end of the first spring is connected with the sleeve, the other end of the first spring is connected with the push block, and the first spring is in a compressed state;

grinding machanism includes grinding assembly and interlock subassembly, grinding assembly has two, and two grinding assemblies set up the both sides at the base respectively, grinding assembly includes location axle and abrasive brick, the setting of location axle is in the base top, the abrasive brick is the cylindricality, the abrasive brick cover is established epaxially in the location, abrasive brick and location axle key-type connection, the drive shaft is connected with one of them location axle, drive shaft and the coaxial setting of location axle, the drive shaft is connected with location axle transmission, the interlock subassembly includes two runners, and two runners overlap respectively and establish epaxially in two locations, and two runners are connected with two location axle keys-type connection respectively, and two runners pass through belt transmission and connect.

In order to compress tightly the work piece, realize better effect of polishing, be equipped with the unit of pushing down on the base, the unit of pushing down has two, and two units of pushing down set up the both sides at the chain respectively, the unit of pushing down includes depression bar, clamp plate and second spring, the depression bar passes the horizontal pole, depression bar and horizontal pole sliding connection, the clamp plate sets up the one end at the depression bar, the clamp plate is just to setting up with the base, the second spring housing is established on the depression bar, the second spring is located between clamp plate and the horizontal pole, the one end and the clamp plate of second spring are connected, the other end and the horizontal pole of second spring are connected.

In order to better limit the movement of the pressing plate, the number of the pressing rods is two, the two pressing rods are respectively arranged at two ends of the pressing plate, the number of the second springs is two, and the two second springs are respectively sleeved on the two pressing rods.

In order to realize better pan feeding effect, the one end that the motor was kept away from to the base is equipped with the pan feeding unit, the pan feeding unit includes box, swash plate and baffle, the box sets up in the base top, the bottom half is equipped with the discharge gate, the swash plate sets up in discharge gate department, be equipped with the blown down tank on the swash plate, the baffle sets up on the swash plate.

In order to carry out better fixed to the push rod, the fixture block has two, and two fixture blocks set up respectively in the both sides of push rod, the spout has two, and two spouts set up respectively in sheathed tube both sides, the bar groove has two, and two bar grooves correspond the setting with two spouts respectively, the draw-in groove has two, and two fixture blocks are located two draw-in grooves respectively.

The polishing device for the end part of the metal square pipe has the advantages that the driving mechanism drives the conveying mechanism to operate to convey workpieces, the polishing mechanism polishes the workpieces, the efficiency is improved by polishing two ends of the workpieces simultaneously compared with the existing polishing device, meanwhile, the device realizes the operation of the conveying mechanism and the polishing mechanism through one output end, energy is saved, the conveying mechanism and the polishing mechanism are linked to realize the online polishing of the workpieces, the efficiency is improved, the linkage adopts a pure mechanical structure, the stability and the service life of the device are improved, and compared with the existing conveying mechanism, the device can adjust the position of the push rod, so that the intermittent time of material pushing is adjusted, the assembly line processing of the workpieces is facilitated, and the practicability is improved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural view of a grinding device for the end of a metal square pipe according to the present invention;

FIG. 2 is a schematic structural view of the polishing device for the end of the metal square tube according to the present invention;

FIG. 3 is a schematic structural diagram of a conveying mechanism of the polishing device for the end part of the metal square pipe, provided by the invention;

FIG. 4 is a schematic view of a pushing assembly of the grinding device for the end of a metal square tube according to the present invention;

FIG. 5 is a schematic view of a connection structure of a fixture block and a sleeve of the polishing device for the end of a metal square tube according to the present invention;

FIG. 6 is a schematic structural view of a rotating assembly of the grinding device for the end of a metal square pipe of the present invention;

in the figure: 1. the automatic bearing device comprises a base, a support rod 2, a cross rod 3, a motor 4, a driving shaft 5, a chain 6, a rotating shaft 7, a rotating gear 8, a first bevel gear 9, a second bevel gear 10, a fixed shaft 11, a small gear 12, a large gear 13, a sleeve 14, a push rod 15, a clamping block 16, a pushing block 17, a pushing block 18, a first spring 19, a positioning shaft 20, a grinding block 21, a rotating wheel 21, a pressing rod 22, a pressing plate 23, a pressing plate 24, a second spring 25, a box 26, an inclined plate 26 and a baffle 27.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1, a polishing device for an end of a metal square tube comprises a base 1, a support rod 2, a cross rod 3, a driving mechanism, a conveying mechanism and a polishing mechanism, wherein the cross rod 3 is arranged above the base 1 through the support rod 2, the driving mechanism is arranged on the base 1, a groove is arranged on the base 1, the conveying mechanism is arranged in the groove, and the polishing mechanism is arranged on the conveying mechanism;

when the device is used, the driving mechanism is operated, the driving mechanism drives the conveying mechanism to operate, the conveying of the workpiece is realized, and the polishing of the workpiece is realized through the polishing mechanism.

As shown in fig. 1, the driving mechanism comprises a motor 4 and a driving shaft 5, the motor 4 is horizontally arranged above the base 1, and the driving shaft 5 is installed on the motor 4;

the motor 4 is operated, and the motor 4 drives the driving shaft 5 to rotate.

As shown in fig. 2-6, the transmission mechanism includes a transmission assembly, a pushing assembly and a rotation assembly, the transmission assembly includes two transmission units, the two transmission units are respectively disposed at two sides of the groove, the transmission unit includes a rotation shaft 7 and a rotation gear 8, the rotation shaft 7 is disposed in the groove, the rotation gear 8 is sleeved on the rotation shaft 7, the rotation gear 8 is connected with the rotation shaft 7 in a key manner, the chain 6 is sleeved on the two rotation gears 8, the two rotation gears 8 are connected in a transmission manner through the chain 6, the rotation assembly includes a first bevel gear 9, a second bevel gear 10, a fixed shaft 11, a pinion 12 and a bull gear 13, the first bevel gear 9 is sleeved on the driving shaft 5, the first bevel gear 9 is connected with the driving shaft 5 in a key manner, the fixed shaft 11 is disposed at one side of the driving shaft 5, the second bevel gear 10 is sleeved on the fixed shaft 11, the second bevel gear 10 is connected with 11 keys of fixed axle, second bevel gear 10 meshes with first bevel gear 9, pinion 12 cover is established on fixed axle 11, pinion 12 is connected with 11 keys of fixed axle, gear wheel 13 cover is established on one of them pivot 7, gear wheel 13 is connected with 7 keys of pivot, gear wheel 13 meshes with pinion 12, it has a plurality ofly to promote the subassembly, and each promotes the subassembly and evenly sets up on chain 6, it includes sleeve pipe 14, push rod 15, fixture block 16 and fixed unit to promote the subassembly, sleeve pipe 14 sets up on chain 6, the one end of push rod 15 is located sleeve pipe 14, outside the other end of push rod 15 stretches out sleeve pipe 14, push rod 15 and sleeve pipe 14 sliding connection, fixture block 16 sets up the one end that is located sleeve pipe 14 at push rod 15, be equipped with the spout in the sleeve pipe 14, the spout is parallel with sleeve pipe 14, the fixing unit comprises a push block 17 and a first spring 18, the push block 17 is arranged in a sleeve 14, the push block 17 is in sliding connection with the sleeve 14, the push block 17 is abutted against a push rod 15, the first spring 18 is arranged in the sleeve 14, one end of the first spring 18 is connected with the sleeve 14, the other end of the first spring 18 is connected with the push block 17, and the first spring 18 is in a compressed state;

the workpiece is placed in a box body 25, falls on an inclined plate 26 through a discharge hole at the bottom of the box body 25, moves to a chain 6 through a discharge groove on the inclined plate 26, blocks the workpiece through a baffle plate 27, so that the discharge groove can only pass through one workpiece in sequence, a push rod 15 can only push one workpiece to move at a time, a driving shaft 5 drives a first bevel gear 9 to rotate, the first bevel gear 9 drives a second bevel gear 10 to rotate, the second bevel gear 10 drives a fixed shaft 11 to rotate, the fixed shaft 11 drives a small gear 12 to rotate, the small gear 12 drives a large gear 13 to rotate, the large gear 13 drives a rotating shaft 7 connected with the large gear 13 to rotate, the rotating shaft 7 drives a rotating gear 8 connected with the rotating shaft to rotate, the rotating gear 8 drives the chain 6 to rotate, the chain 6 drives a sleeve 14 to rotate, the sleeve 14 drives the push rod 15 to rotate, and the push, along with the movement of the push rod 15, the push rod 15 pushes the workpiece to move, so that the workpiece moves to the polishing mechanism, the push rods 15 are uniformly arranged, so that the push rods 15 can sequentially push the workpiece to move, intermittent and uniform material pushing is realized, when the time of intermittent material pushing needs to be adjusted, the distance between the push rods 15 needs to be adjusted, when the position of the push rod 15 needs to be adjusted, the push rod 15 is pressed downwards, the push rod 15 drives the fixture block 16 to move, so that the fixture block 16 moves out of the clamping groove and moves to the strip-shaped groove, then the push rod 15 is rotated, the fixture block 16 is driven to rotate by the push rod 15, so that the fixture block 16 rotates to the sliding groove along the strip-shaped groove, at the moment, a spring is in a compression state, the restoring force of the first spring 18 generates outward thrust to the push block 17, the push block 17 generates outward thrust to the push rod 15, so that the fixture block 16 moves outward along the, thereby realizing the adjustment of the intermittent material pushing time.

As shown in fig. 2, grinding machanism includes grinding assembly and interlock subassembly, grinding assembly has two, and two grinding assemblies set up the both sides at base 1 respectively, grinding assembly includes location axle 19 and abrasive brick 20, location axle 19 sets up in base 1 top, abrasive brick 20 is the cylindricality, abrasive brick 20 cover is established on location axle 19,

abrasive brick

20 and 19 key-types of location axle, drive shaft 5 is connected with one of them location axle 19, drive shaft 5 and the coaxial setting of location axle 19, drive shaft 5 is connected with location axle 19 transmission, the interlock subassembly includes two runners 21, and two runners 21 overlap respectively and establish on two location axles 19, and two runners 21 connect with two 19 key-types of location axle respectively, and two runners 21 pass through belt transmission and connect.

The drive shaft 5 is rotated the location axle 19 that the drive is connected with and is rotated, location axle 19 drive abrasive brick 20 is rotatory, polish the tip of work piece through abrasive brick 20, the runner 21 that the axle 19 drive of location is connected with is rotatory simultaneously, this runner 21 is rotatory through another runner 21 of belt drive, another runner 21 drives another location axle 19 and is rotatory, another location axle 19 drives another abrasive brick 20 and is rotatory, thereby make two abrasive bricks 20 rotatory simultaneously, thereby all polish the both ends of work piece, the efficiency of polishing is improved.

When the workpiece moves to the base 1, the workpiece is clamped between the pressing plate 23 and the base 1, the second spring 24 is in a compression state at the moment, and restoring force of the second spring 24 generates downward thrust to the pressing plate 23, so that the pressing plate 23 compresses the workpiece, the workpiece is prevented from moving when being polished, and a better polishing effect is achieved.

In order to compress tightly the work piece, realize better effect of polishing, be equipped with down the press unit on the base 1, it has two to push down the unit, and two push down the unit and set up respectively in the both sides of chain 6, it includes depression bar 22, clamp plate 23 and second spring 24 to push down the unit, depression bar 22 passes horizontal pole 3,

depression bar

22 and 3 sliding connection of horizontal pole, clamp plate 23 sets up the one end at depression bar 22, clamp plate 23 is just to setting up with base 1, second spring 24 cover is established on depression bar 22, second spring 24 is located between clamp plate 23 and the horizontal pole 3, the one end and the clamp plate 23 of second spring 24 are connected, the other end and the horizontal pole 3 of second spring 24 are connected.

In order to better limit the movement of the pressing plate 23, the number of the pressing rods 22 is two, the two pressing rods 22 are respectively arranged at two ends of the pressing plate 23, the number of the second springs 24 is two, and the two second springs 24 are respectively sleeved on the two pressing rods 22.

In order to realize better pan feeding effect, the one end that motor 4 was kept away from to base 1 is equipped with the pan feeding unit, the pan feeding unit includes box 25, swash plate 26 and baffle 27, box 25 sets up in base 1 top, the box 25 bottom is equipped with the discharge gate, swash plate 26 sets up in discharge gate department, be equipped with the blown down tank on the swash plate 26, baffle 27 sets up on swash plate 26.

In order to better fix push rod 15, fixture block 16 has two, and two fixture blocks 16 set up respectively in the both sides of push rod 15, the spout has two, and two spouts set up respectively in the both sides of sleeve pipe 14, the bar groove has two, and two bar grooves correspond the setting with two spouts respectively, the draw-in groove has two, and two fixture blocks 16 are located two draw-in grooves respectively.

When the device is used, a workpiece is placed in a box body 25 and falls down to a discharge chute on an inclined plate 26 through a discharge port at the bottom, the workpiece passes through the discharge chute and goes down to a pulley, the discharge chute only enables one workpiece to slide to a push rod 15 at each time through a baffle plate 27, a motor 4 is operated, the motor 4 drives a driving shaft 5 to rotate, the driving shaft 5 drives a rotating component to rotate, the rotating component drives a transmission component to rotate, the transmission component drives a pushing component to rotate, so that each push rod 15 moves, and therefore intermittent pushing of the workpiece is achieved, when a large gear 13 rotates for one circle, a small gear 12 rotates for multiple circles, so that rotation of the large gear 13 is decelerated, movement of the push rod 15 is decelerated, the workpiece can pass through a grinding block 20 at a slower speed, both ends of the workpiece are fully ground, a better grinding effect is achieved, when the intermittent transmission time of the workpiece needs to be adjusted, when the distance between the push rods 15 is required to be adjusted, the push rods 15 are pressed downwards, the push rods 15 drive the fixture blocks 16 to move downwards, the fixture blocks 16 move out of the clamping grooves, then the push rods 15 are rotated, the fixture blocks 16 rotate along the strip-shaped grooves, so that the fixture blocks 16 move to the sliding grooves, then under the action of restoring force of the first springs 18, the first springs 18 drive the push blocks 17 to move, the push blocks 17 drive the push rods 15 to move, the push rods 15 drive the fixture blocks 16 to move, the push rods 15 can be taken down, the drive shaft 5 rotates to drive the positioning shafts 19 to rotate, the positioning shafts 19 drive the grinding blocks 20 to rotate, the two positioning shafts 19 rotate simultaneously under the drive of the rotating wheels 21 and the belt, so that the two grinding blocks 20 rotate simultaneously, the two grinding blocks 20 polish two ends of the workpiece simultaneously respectively, the efficiency is improved, and the pressing force is generated on the pressing plate 23 by the restoring, thereby make clamp plate 23 compress tightly the work piece to avoid the work piece to take place the skew when polishing, thereby improved the effect of polishing, compare with current 15 fixed establishment of push rod, this mechanism can realize the dismouting through simple pressing and rotating, has avoided the use of instruments such as electric drill, has saved the manpower, has improved work efficiency.

Compared with the prior art, this a grinding device for metal side's pipe end portion, through the operation of actuating mechanism drive transport mechanism, realize the conveying of work piece, realize polishing of work piece through grinding mechanism, compare with current grinding device, the device is through polishing simultaneously to the both ends of work piece, efficiency is improved, the device has realized transport mechanism and grinding mechanism's operation through an output simultaneously, the energy has been saved, and transport mechanism and grinding mechanism adopt the linkage, the online polishing of work piece has been realized, efficiency is improved, this linkage adopts pure mechanical structure, the stability and the life of device have been improved, compare with current transport mechanism, the position of push rod 15 is adjusted to this mechanism's accessible, thereby adjust the intermittent time of pushing away the material, make things convenient for the assembly line processing of work piece, and the practicality is improved.

In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The polishing device for the end part of the metal square tube is characterized by comprising a base (1), a support rod (2), a cross rod (3), a driving mechanism, a conveying mechanism and a polishing mechanism, wherein the cross rod (3) is arranged above the base (1) through the support rod (2), the driving mechanism is arranged on the base (1), a groove is formed in the base (1), the conveying mechanism is arranged in the groove, and the polishing mechanism is arranged on the conveying mechanism;

the driving mechanism comprises a motor (4) and a driving shaft (5), the motor (4) is horizontally arranged above the base (1), and the driving shaft (5) is arranged on the motor (4);

transport mechanism includes transfer unit, promotion subassembly and runner assembly, transfer unit includes chain (6) and transfer unit, transfer unit has two, and two transfer units set up the both sides at the recess respectively, transfer unit includes pivot (7) and bull gear (8), pivot (7) set up in the recess, bull gear (8) cover is established on pivot (7), bull gear (8) and pivot (7) key-type connection, chain (6) cover is established on two bull gears (8), and two bull gear (8) are connected through chain (6) transmission, runner assembly includes first bevel gear (9), second bevel gear (10), fixed axle (11), pinion (12) and gear wheel (13), first bevel gear (9) cover is established on drive shaft (5), first bevel gear (9) and drive shaft (5) key-type connection, the utility model discloses a chain pushing device, including fixed axle (11), second bevel gear (10), pinion (12), second bevel gear (10) and fixed axle (11) key-type, second bevel gear (10) and first bevel gear (9) meshing, pinion (12) are established on fixed axle (11), pinion (12) and fixed axle (11) key-type connection, gear wheel (13) are established on one of them pivot (7) are established to gear wheel (10) and first bevel gear (9) meshing, gear wheel (13) and pinion (12) meshing, it has a plurality ofly to promote the subassembly, and each promotes the subassembly and evenly sets up on chain (6), it includes sleeve pipe (14), push rod (15), fixture block (16) and fixed unit to promote the subassembly, sleeve pipe (14) set up on chain (6), the one end of push rod (15) is located sleeve pipe (14), the other end of the push rod (15) extends out of the sleeve (14), the push rod (15) is connected with the sleeve (14) in a sliding mode, the clamping block (16) is arranged at one end, located in the sleeve (14), of the push rod (15), a sliding groove is formed in the sleeve (14), the sliding groove is parallel to the sleeve (14), a strip-shaped groove is formed in the bottom of the sliding groove and perpendicular to the sliding groove, a clamping groove is formed in one end, away from the sliding groove, of the strip-shaped groove, the clamping block (16) is located in the clamping groove, the clamping block (16) abuts against the clamping groove, the fixing unit comprises a push block (17) and a first spring (18), the push block (17) is arranged in the sleeve (14), the push block (17) is connected with the sleeve (14) in a sliding mode, the push block (17) abuts against the push rod (15), the first spring (18) is arranged in the sleeve (14), and one end of the first spring (18) is connected with the sleeve, the other end of the first spring (18) is connected with a push block (17), and the first spring (18) is in a compressed state;

the polishing mechanism comprises two polishing assemblies and a linkage assembly, the two polishing assemblies are respectively arranged on two sides of a base (1), each polishing assembly comprises a positioning shaft (19) and a grinding block (20), the positioning shaft (19) is arranged above the base (1), each grinding block (20) is cylindrical, the grinding blocks (20) are sleeved on the positioning shafts (19), the grinding blocks (20) are in key connection with the positioning shafts (19), a driving shaft (5) is connected with one of the positioning shafts (19), the driving shaft (5) and the positioning shafts (19) are coaxially arranged, the driving shaft (5) is in transmission connection with the positioning shafts (19), the linkage assembly comprises two rotating wheels (21), the two rotating wheels (21) are respectively sleeved on the two positioning shafts (19), and the two rotating wheels (21) are respectively in key connection with the two positioning shafts (19), the two rotating wheels (21) are in transmission connection through a belt.

2. The grinding device for the end of a metal square pipe according to claim 1, the base (1) is provided with two pressing units which are respectively arranged at the two sides of the chain (6), the pressing unit comprises a pressing rod (22), a pressing plate (23) and a second spring (24), the pressure lever (22) penetrates through the cross rod (3), the pressure lever (22) is connected with the cross rod (3) in a sliding way, the pressure plate (23) is arranged at one end of the pressure lever (22), the pressure plate (23) is arranged opposite to the base (1), the second spring (24) is sleeved on the pressure rod (22), the second spring (24) is positioned between the pressure plate (23) and the cross rod (3), one end of the second spring (24) is connected with the pressing plate (23), and the other end of the second spring (24) is connected with the cross rod (3).

3. The grinding device for the end portions of the metal square pipes according to claim 2, wherein the number of the pressing rods (22) is two, the two pressing rods (22) are respectively arranged at two ends of the pressing plate (23), the number of the second springs (24) is two, and the two second springs (24) are respectively sleeved on the two pressing rods (22).

4. The grinding device for the end part of the metal square pipe according to claim 1, wherein a feeding unit is arranged at one end of the base (1) far away from the motor (4), the feeding unit comprises a box body (25), an inclined plate (26) and a baffle plate (27), the box body (25) is arranged above the base (1), a discharge hole is formed in the bottom of the box body (25), the inclined plate (26) is arranged at the discharge hole, a discharge groove is formed in the inclined plate (26), and the baffle plate (27) is arranged on the inclined plate (26).

5. The grinding device for the end part of the metal square pipe according to claim 1, wherein there are two clamping blocks (16), two clamping blocks (16) are respectively arranged at two sides of the push rod (15), there are two sliding grooves, two sliding grooves are respectively arranged at two sides of the sleeve (14), there are two strip-shaped grooves, two strip-shaped grooves are respectively arranged corresponding to the two sliding grooves, there are two clamping grooves, and two clamping blocks (16) are respectively positioned in the two clamping grooves.