CN111283104A

CN111283104A - Tubular metal piece flaring device

Info

Publication number: CN111283104A
Application number: CN202010143157.5A
Authority: CN
Inventors: 张新华; 卢丽娟
Original assignee: University of Shaoxing
Current assignee: University of Shaoxing
Priority date: 2020-03-04
Filing date: 2020-03-04
Publication date: 2020-06-16

Abstract

A flaring device for tubular metal parts belongs to the technical field of tubular metal part machining. The pipe-shaped metal part expanding device comprises a workbench, wherein a turntable is arranged at the top end of the workbench, two lower forming dies are arranged at the top end of the turntable, a forming die used for sleeving a tubular metal part is arranged on each lower forming die, a rack is further arranged at the top end of the workbench, a first air cylinder is arranged at the top end of the rack, a pressing plate is connected to the output end of the first air cylinder after penetrating through the rack, an upper forming die is arranged at the bottom end of the pressing plate, a die groove matched with the forming die is formed in the bottom end of the upper forming die, the upper forming die and the lower forming dies are matched with each other to expand the tubular metal part. The invention is convenient to operate and is suitable for flaring tubular metal pieces with the diameter of 3-6 mm. The invention can correct the tiny error caused by the improper rotation of the turntable by arranging the locking mechanism, so that the upper forming die is aligned with the lower forming die, and the forming die is prevented from being damaged during flaring.

Description

Tubular metal piece flaring device

Technical Field

The invention belongs to the technical field of tubular metal part machining, and particularly relates to a flaring device for a tubular metal part.

Background

Flaring is a stamping process that expands the open area of a hollow or tubular member outwardly. At present, flaring of a tubular metal piece generally adopts the following two ways: 1. the flaring method is characterized in that manual operation is adopted, and the flaring is finished by knocking the tubular metal piece by a hammer of a worker, so that manpower and material resources are wasted, labor and time are wasted, the production efficiency is low, industrial accidents are easily caused, the operation difficulty is high, and the flaring quality of the tubular metal piece is influenced; 2. the punching machine is adopted for punch forming, the flaring mode is adopted, products are prone to being scrapped due to electrical faults of the punching machine and artificial feeding faults, due to the fact that punching machine equipment is used, an operator still has certain personal safety hazards, for tubular metal pieces with the diameters of 3-6mm, the punching heads of the punching machine are difficult to align with the metal pieces, the precision is low, the metal pieces are prone to being damaged, and the product percent of pass is low. Meanwhile, the punch press also has the defect of inconvenient movement.

Disclosure of Invention

The invention mainly solves the technical problems in the prior art, and provides a flaring device for a tubular metal piece.

The technical problem of the invention is mainly solved by the following technical scheme: a flaring device for tubular metal pieces comprises a workbench, wherein a turntable is arranged at the top end of the workbench, two lower forming dies are arranged at the top end of the turntable, the lower forming dies are symmetrically arranged between the lower forming dies, a forming die for sleeving the tubular metal pieces is arranged on each lower forming die, a frame is further arranged at the top end of the workbench, a first air cylinder is arranged at the top end of the frame, the output end of the first air cylinder penetrates through the frame and is connected with a pressing plate, an upper forming die is arranged at the bottom end of the pressing plate, a die groove matched with the forming die is formed in the bottom end of the upper forming die, and the upper forming die and the lower forming dies are matched with each other to; a power mechanism for driving the rotary table to rotate is arranged in the inner cavity of the workbench and comprises a first driving motor, a rotating shaft, a first bevel gear and a second bevel gear, the output end of the first driving motor is connected with the first bevel gear, the first bevel gear is meshed with the second bevel gear, the second bevel gear is installed on the rotating shaft, the upper end and the lower end of the rotating shaft are respectively rotatably connected with the inner walls of the two sides of the workbench, and the upper end of the rotating shaft penetrates through the workbench and then is connected with the rotary table;

the lower forming die comprises a die base, a die containing groove is formed in the top end of the die base, the bottom end of the forming die is abutted to the bottom of the die containing groove, a fixed plate is sleeved on the forming die and located in the die containing groove, the fixed plate fixes the bottom of the forming die in the die containing groove through the bottom of the spiro union die containing groove, a moving groove is formed in the bottom end of the die base, a first moving plate is arranged in the moving groove, the top end of the first moving plate is connected with a first telescopic rod, the other end of the first telescopic rod is connected with the bottom of the moving groove, a first spring is sleeved on the first telescopic rod, one end of the first spring is abutted to the top end of the first moving plate, the other end of the first spring is abutted to the bottom of the moving groove, a connecting rod is further connected to the first moving plate, and the connecting rod takes the circle center of, the other end of the connecting rod penetrates through the mold base and is connected with a demolding plate, the demolding plate is sleeved with a forming mold, a first through hole is formed in the turntable below the first movable plate, a top block is arranged in the first through hole, the top end of the top block is fixedly connected with the bottom end of the first movable plate, a second through hole is formed in the workbench and corresponds to the first through hole, a second air cylinder is further installed in the inner cavity of the workbench, and the output end of the second air cylinder is opposite to the second through hole;

the bottom end of the workbench is provided with supporting legs, a third air cylinder is arranged at the bottom end of the workbench close to the supporting legs, the output end of the third air cylinder is connected with a roller wheel support, a roller wheel is arranged on the roller wheel support, and a protection plate is arranged between every two adjacent supporting legs; the frame is provided with a controller, and the controller is electrically connected with the first driving motor, the first air cylinder, the second air cylinder and the third air cylinder.

Preferably, the inner cavity of the workbench is further provided with two locking mechanisms for locking the rotary table, the two locking mechanisms are symmetrically arranged, each locking mechanism comprises a locking box, the locking box is fixedly arranged on the inner wall of the workbench, a second movable plate and a cam are arranged in the locking box, the second movable plate is positioned above the cam, the top end of the second movable plate is provided with a pin, two sides of the pin are provided with a second telescopic rod at the top end of the second movable plate, the other end of the second telescopic rod is connected with the inner wall of the workbench, a second spring is sleeved on the second telescopic rod, one end of the second spring is abutted against the top end of the second movable plate, the other end of the second spring is abutted against the inner wall of the workbench, the rotary table is provided with two locking holes, the locking holes are symmetrically arranged and are respectively positioned at two sides of a connecting line between the lower forming dies, the workstation seted up with pin assorted pinhole, just the pinhole corresponds with the locking hole, the one end that the second movable plate was kept away from to the pin is located the pinhole, the cam is connected with the bull stick, the other end of bull stick runs through the locking case to outside extending to the locking case, install the belt pulley on the bull stick, the cover is equipped with the belt on the belt pulley, connect through belt transmission between the belt pulley, one of them fixed mounting has second driving motor on the locking case, second driving motor's output links to each other with the bull stick, second driving motor electric connection controller.

Preferably, the turntable is provided with a dustproof cover for covering the locking hole.

Preferably, the left side and the right side of the turntable are provided with screw rod bases on the workbench, the screw rod bases are of hollow structures, and screw rods are in threaded connection with the screw rod bases.

Preferably, guide rods are mounted on the left side and the right side of the top end of the pressing plate, and the other ends of the guide rods penetrate through the rack and extend to the upper portion of the rack.

The invention has the following beneficial effects: the flaring device is convenient to operate, novel in structure and suitable for flaring tubular metal pieces with the diameters of 3-6 mm. The invention can correct the tiny error caused by the improper rotation of the turntable by arranging the locking mechanism, so that the upper forming die is aligned with the lower forming die, and the forming die is prevented from being damaged during flaring. According to the invention, through the mutual matching of the first moving plate, the connecting rod, the demoulding plate, the jacking block, the second cylinder, the first through hole and the second through hole, the metal piece after flaring can be quickly demoulded from the forming die, an operator can conveniently take and place a new metal piece, and the production efficiency is improved. According to the invention, the screw rod is matched with the screw rod base, so that the downward movement distance of the pressure plate can be adjusted, and the lower forming die is prevented from being damaged due to the impact of the upper forming die caused by excessive downward movement of the pressure plate.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of the present invention with the access door and protective panel removed;

FIG. 3 is a schematic top view of the present invention;

FIG. 4 is a schematic view showing a connection structure of the second through hole and the second cylinder according to the present invention;

FIG. 5 is a schematic view of a lower mold of the present invention;

FIG. 6 is a schematic view of a mold of the present invention;

FIG. 7 is a schematic view of a configuration of the upper surface of the base of the mold of the present invention;

FIG. 8 is a schematic view of a lower surface of the mold base of the present invention;

FIG. 9 is a schematic view of a connection of the stripper plate, link and first moving plate of the present invention;

FIG. 10 is a view showing a state of use of the lower molding die of the present invention;

FIG. 11 is a schematic view showing a structure of an upper molding die of the present invention;

FIG. 12 is a schematic view of one embodiment of the lock box of the present invention;

FIG. 13 is a schematic view of one construction of the pulley of the present invention;

FIG. 14 is a schematic view of a configuration of the table of the present invention;

FIG. 15 is a schematic view of a construction of the turntable of the present invention;

fig. 16 is a schematic view of a connection structure of the lead screw and the lead screw base according to the present invention.

In the figure: 1. a work table; 2. a turntable; 3. a lower forming die; 4. forming a mold; 5. a frame; 6. a first cylinder; 7. pressing a plate; 8. an upper forming die; 9. a mold slot; 10. a first drive motor; 11. a rotating shaft; 12. a first bevel gear; 13. a second bevel gear; 14. a mold base; 15. a mold accommodating groove; 16. a fixing plate; 17. a moving groove; 18. a first moving plate; 19. a first telescopic rod; 20. a first spring; 21. a connecting rod; 22. a stripper plate; 23. a first through hole; 24. a top block; 25. a second through hole; 26. a second cylinder; 27. supporting legs; 28. a third cylinder; 29. a roller bracket; 30. a roller; 31. a protection plate; 32. a controller; 33. a lock box; 34. a second moving plate; 35. a cam; 36. a pin; 37. a second telescopic rod; 38. a second spring; 39. a locking hole; 40. a pin hole; 41. a rotating rod; 42. a belt pulley; 43. a belt; 44. a second drive motor; 45. a dust cover; 46. a screw base; 47. a screw rod; 48. a guide bar; 49. locking the box door; 50. an access door; 51. a metal piece.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.

Example (b): a flaring device for tubular metal pieces is disclosed, as shown in figures 1-16, and comprises a workbench 1, wherein the top end of the workbench 1 is provided with a turntable 2, the top end of the turntable 2 is provided with two lower forming dies 3, the lower forming dies 3 are symmetrically arranged, the lower forming dies 3 are provided with forming dies 4 for sleeving tubular metal pieces 51, the forming dies 4 are in an inverted T shape, the top end of the workbench 1 is provided with a frame 5, the top end of the frame 5 is provided with a first air cylinder 6, the output end of the first air cylinder 6 penetrates through the frame 5 and is connected with a pressing plate 7, the width of the pressing plate 7 is smaller than the radius of the turntable 2, the pressing plate 7 is positioned above one side of the turntable 2, the bottom end of the pressing plate 7 is provided with an upper forming die 8, the upper forming die 8 is in threaded connection with the pressing plate 7, the bottom end of the upper forming die 8 is provided, the first air cylinder 6 drives the pressing plate 7 to move downwards, the pressing plate 7 drives the upper forming die 8 to move downwards, and the upper forming die 8 and the lower forming die 3 are matched with each other to flare the metal piece 51.

The utility model discloses a rotary table, including workstation 1, power unit, first driving motor 10, pivot 11, first bevel gear 12 and second bevel gear 13, be equipped with in the inner chamber of workstation 1 and be used for driving carousel 2 pivoted power unit, power unit includes first driving motor 10, pivot 11, first bevel gear 12 and second bevel gear 13, first driving motor 10 installs the bottom at workstation 1 inner wall, the output of first driving motor 10 links to each other with first bevel gear 12, first bevel gear 12 meshes second bevel gear 13, second bevel gear 13 installs in pivot 11, the upper and lower both ends of pivot 11 rotate with the both sides inner wall of workstation 1 respectively and are connected, the upper end of pivot 11 is run through behind the workstation 1 and is linked to each other with carousel 2. The first driving motor 10 drives the first bevel gear 12 to rotate, the first bevel gear 12 engages with the second bevel gear 13 to rotate the second bevel gear 13, the second bevel gear 13 rotates to drive the rotating shaft 11 to rotate, and the rotating shaft 11 is connected with the rotating disc 2 to rotate the rotating disc 2. The first driving motor 10 can drive the turntable 2 to rotate 180 degrees clockwise or 180 degrees counterclockwise through the rotating shaft 11.

The lower forming die 3 comprises a die base 14, a die accommodating groove 15 is formed in the top end of the die base 14, the bottom end of the forming die 4 is abutted to the bottom of the die accommodating groove 15, a fixing plate 16 is sleeved on the forming die 4 and located in the die accommodating groove 15, and the fixing plate 16 is in threaded connection with the bottom of the die accommodating groove 15 through a bolt, so that the bottom of the forming die 4 is fixed in the die accommodating groove 15. The forming die 4 and the fixing plate 16 are mounted in such a way that the forming die 4 is convenient to mount and dismount and convenient to operate. The bottom end of the mold base 14 is provided with a moving groove 17, a first moving plate 18 is arranged in the moving groove 17, the top end of the first moving plate 18 is connected with a first telescopic rod 19, the other end of the first telescopic rod 19 is connected with the bottom of the moving groove 17, a first spring 20 is sleeved on the first telescopic rod 19, one end of the first spring 20 is abutted to the top end of the first moving plate 18, the other end of the first spring 20 is abutted to the bottom of the moving groove 17, the first moving plate 18 is further connected with a connecting rod 21, the connecting rod 21 takes the circle center of the first moving plate 18 as a central circumferential array, the other end of the connecting rod 21 penetrates through the mold base 14 and is connected with a demolding plate 22, the demolding plate 22 is sleeved with the forming mold 4, a first through hole 23 is formed in the turntable 2 below the first moving plate 18, a top block 24 is arranged in the first through hole 23, the top end of the top block 24 is fixedly connected with the bottom end of the, a second through hole 25 is formed in the workbench 1, the second through hole 25 corresponds to the first through hole 23, a second air cylinder 26 is further installed in the inner cavity of the workbench 1, and the output end of the second air cylinder 26 is over against the second through hole 25. After the flaring of the metal piece 51 is completed, the output end of the second cylinder 26 sequentially passes through the second through hole 25 and the first through hole 23 and then contacts with the top block 24, the top block 24 is pushed upwards, the top block 24 pushes the first moving plate 18 to move upwards due to the connection between the top block 24 and the first moving plate 18, the first moving plate 18 drives the demoulding plate 22 to move upwards through the connecting rod 21, the demoulding plate 22 pushes the metal piece 51 to demould from the forming die 4, and then an operator takes down the metal piece 51 from the forming die 4; then the output end of the second cylinder 26 retracts, the first moving plate 18 and the top block 24 move downwards under the action of the first spring 20, and the first moving plate 18 drives the stripper plate 22 to reset through the connecting rod 21.

The inner cavity of the workbench 1 is further provided with two locking mechanisms for locking the turntable 2, the two locking mechanisms are symmetrically arranged, each locking mechanism comprises a locking box 33, the locking boxes 33 are fixedly arranged on the inner wall of the workbench 1, a second moving plate 34 and a cam 35 are arranged in each locking box 33, the second moving plate 34 is located above the cam 35, a pin 36 is arranged at the top end of the second moving plate 34, second telescopic rods 37 are arranged at the top ends of the second moving plates 34 on two sides of the pin 36, the other ends of the second telescopic rods 37 are connected with the inner wall of the workbench 1, a second spring 38 is sleeved on each second telescopic rod 37, one end of each second spring 38 is abutted against the top end of the corresponding second moving plate 34, the other end of each second spring 38 is abutted against the inner wall of the workbench 1, and the turntable 2 is provided with two locking holes 39, the locking holes 39 are symmetrically arranged and are respectively located on two sides of a connecting line between the lower forming dies 3, the workbench 1 is provided with pin holes 40 matched with the pins 36, the pin holes 40 correspond to the locking holes 39, one ends, far away from the second moving plates 34, of the pins 36 are located in the pin holes 40, the cams 35 are connected with rotating rods 41, the other ends of the rotating rods 41 penetrate through the locking boxes 33 and extend out of the locking boxes 33, belt pulleys 42 are mounted on the rotating rods 41, belts 43 are sleeved on the belt pulleys 42, the belt pulleys 42 are in transmission connection through the belts 43, a second driving motor 44 is fixedly mounted on one of the locking boxes 33, and the output end of the second driving motor 44 is connected with the rotating rods 41. When the rotating disc 2 is used, the second driving motor 44 drives the cam 35 to rotate through the rotating rod 41, when the convex end of the cam 35 turns to the second moving plate 34 and contacts with the second moving plate 34, the second moving plate 34 can be pushed to move upwards, and under the driving of the second moving plate 34, one end, away from the second moving plate 34, of the pin 36 extends into the locking hole 39, so that the rotating disc 2 is locked; when the convex end of the cam 35 moves away from the second moving plate 34, the second moving plate 34 moves downward under the action of the second spring 38, and the end of the pin 36 away from the second moving plate 34 is reset by the second moving plate 34. Through the design of adopting locking mechanism, can correct the small error that produces because of carousel 2 rotates not in place, make upper forming die 8 just to lower forming die 3, avoid forming die 4 to be damaged when the flaring.

The front surface of the locking box 33 is provided with a locking box door 49, and when the locking box door 49 is opened, the working conditions of the cam 35 and the second moving plate 34 can be observed, and the later maintenance and overhaul are facilitated. An access door 50 is arranged on the front surface of the workbench 1. Be equipped with the shield 45 that is used for closing cap locking hole 39 on carousel 2, shield 45 can avoid dust or particulate matter to get into locking hole 39 and cause locking hole 39 to block up. The left side and the right side of the turntable 2 are provided with a screw rod base 46 on the workbench 1, the screw rod base 46 is of a hollow structure, and a screw rod 47 is connected to the screw rod base 46 in a threaded manner. The screw rod 47 is used for adjusting the downward moving distance of the pressure plate 7, and the lower forming die 3 is prevented from being damaged by the impact of the upper forming die 8 due to the excessive downward movement of the pressure plate 7. When the pressing plate 7 moves downwards and the bottom end of the pressing plate is contacted with the top end of the screw rod 47, the upper forming die 8 is just closed to the lower forming die 3. By rotating the screw rod 47, the length of the screw rod 47 extending into the screw rod base 46 can be changed, so that the downward moving distance of the pressure plate 7 is changed. Guide rods 48 are mounted on the left side and the right side of the top end of the pressing plate 7, and the other ends of the guide rods 48 penetrate through the rack 5 and extend to the upper portion of the rack 5. In the downward moving process of the pressing plate 7, the guide function of the guide rod 48 is utilized, so that the situation that the pressing plate 7 shakes in the downward moving process can be effectively prevented, the closing precision is improved, and the use reliability is improved.

The bottom of workstation 1 is equipped with supporting leg 27, is close to supporting leg 27 and is in the third cylinder 28 is installed to the bottom of workstation 1, the output of third cylinder 28 is connected with gyro wheel support 29, install gyro wheel 30 on the gyro wheel support 29. When the device needs to be moved, the third cylinder 28 drives the roller bracket 29 to move downwards, so that the roller 30 is in contact with the ground. Adjacent two be equipped with protection plate 31 between the supporting leg 27, the setting of protection plate 31 not only can shelter from third cylinder 28, gyro wheel support 29, has promoted the aesthetic property of this device, but also can protect third cylinder 28, gyro wheel support 29 and gyro wheel 30, avoids bumping and leads to damaging. The frame 5 is provided with a controller 32, the controller 32 is electrically connected to the first driving motor 10, the second driving motor 44, the first cylinder 6, the second cylinder 26 and the third cylinder 28, and the controller 32 is used for controlling the working states of the first driving motor 10, the second driving motor 44, the first cylinder 6, the second cylinder 26 and the third cylinder 28.

The use method of the flaring device is as follows, for convenience of description, two lower forming dies are respectively marked, the lower forming die close to an operator is marked as a lower forming die A, and the lower forming die far away from the operator is marked as a lower forming die B:

step (1), sleeving a metal piece on a forming die of a lower forming die A, then driving a turntable to rotate 180 degrees by a first driving motor, rotating the lower forming die A to the position below an upper forming die, and rotating a lower forming die B to the front of an operator;

step (2), a second driving motor drives the cam to rotate, when the convex end of the cam turns to the second moving plate and contacts with the second moving plate, the second moving plate is pushed to move upwards, and under the driving of the second moving plate, one end, far away from the second moving plate, of the pin extends into the locking hole to lock the turntable;

step (3), the first air cylinder drives the pressing plate to move downwards so as to drive the upper forming die to move downwards, and when the upper forming die and the lower forming die A are combined, flaring operation is carried out on the metal piece; when the metal piece is flared, a new metal piece is sleeved on a forming die of the lower forming die B;

step (4), after the flaring of the metal piece is finished, the pressing plate moves upwards under the driving of the first cylinder, so that the upper forming die is driven to move upwards; meanwhile, the second driving motor drives the cam to rotate, so that the convex end of the cam is far away from the second moving plate, the second moving plate moves downwards under the action of a second spring, and one end, far away from the second moving plate, of the pin is reset under the driving of the second moving plate, so that the turntable is unlocked;

step (5), the first driving motor drives the turntable to rotate 180 degrees, the lower forming die A is rotated to the front of an operator, and the lower forming die B is rotated to the position below the upper forming die;

step (6), the second driving motor drives the cam to rotate, when the convex end of the cam turns to the second moving plate and contacts with the second moving plate, the second moving plate is pushed to move upwards, and under the driving of the second moving plate, one end, far away from the second moving plate, of the pin extends into the locking hole to lock the turntable;

step (7), the output end of the second cylinder sequentially penetrates through the second through hole and the first through hole and then contacts with the ejector block, the ejector block is ejected upwards, the ejector block pushes the first moving plate to move upwards, the first moving plate drives the stripper plate to move upwards through the connecting rod, the stripper plate pushes the flared metal piece to be stripped from the forming die, then an operator takes down the flared metal piece, and a new metal piece is sleeved on the forming die of the lower forming die A again; meanwhile, the first air cylinder drives the pressing plate to move downwards so as to drive the upper forming die to move downwards, and when the upper forming die and the lower forming die B are combined, flaring operation is carried out on the metal piece;

step (8), after the flaring of the metal piece is finished, the pressing plate moves upwards under the driving of the first cylinder, so that the upper forming die is driven to move upwards; meanwhile, the second driving motor drives the cam to rotate, so that the convex end of the cam is far away from the second moving plate, the second moving plate moves downwards under the action of a second spring, and one end, far away from the second moving plate, of the pin is reset under the driving of the second moving plate, so that the turntable is unlocked;

and (9) driving the turntable to rotate 180 degrees by the first driving motor, rotating the lower forming die B to the front of an operator, rotating the lower forming die A to the lower part of the upper forming die, opening the flaring operation of the metal piece in a new round, and repeating the steps.

In conclusion, the flaring device is convenient to operate, novel in structure and suitable for flaring tubular metal parts with the diameters of 3-6 mm. The invention can correct the tiny error caused by the improper rotation of the turntable by arranging the locking mechanism, so that the upper forming die is aligned with the lower forming die, and the forming die is prevented from being damaged during flaring. According to the invention, through the mutual matching of the first moving plate, the connecting rod, the demoulding plate, the jacking block, the second cylinder, the first through hole and the second through hole, the metal piece after flaring can be quickly demoulded from the forming die, an operator can conveniently take and place a new metal piece, and the production efficiency is improved. According to the invention, the screw rod is matched with the screw rod base, so that the downward movement distance of the pressure plate can be adjusted, and the lower forming die is prevented from being damaged due to the impact of the upper forming die caused by excessive downward movement of the pressure plate.

Finally, it should be noted that the above embodiments are merely representative examples of the present invention. It is obvious that the invention is not limited to the above-described embodiments, but that many variations are possible. Any simple modification, equivalent change and modification made to the above embodiments in accordance with the technical spirit of the present invention should be considered to be within the scope of the present invention.

Claims

1. A flaring device for tubular metal pieces comprises a workbench and is characterized in that a turntable is arranged at the top end of the workbench, two lower forming dies are mounted at the top end of the turntable and symmetrically arranged between the lower forming dies, a forming die for sleeving the tubular metal pieces is mounted on each lower forming die, a frame is further arranged at the top end of the workbench, a first air cylinder is mounted at the top end of the frame, the output end of the first air cylinder penetrates through the frame and is connected with a pressing plate, an upper forming die is mounted at the bottom end of the pressing plate, a die groove matched with the forming die is formed in the bottom end of the upper forming die, and the upper forming die and the lower forming dies are matched with each other to flare the tubular metal pieces; a power mechanism for driving the rotary table to rotate is arranged in the inner cavity of the workbench and comprises a first driving motor, a rotating shaft, a first bevel gear and a second bevel gear, the output end of the first driving motor is connected with the first bevel gear, the first bevel gear is meshed with the second bevel gear, the second bevel gear is installed on the rotating shaft, the upper end and the lower end of the rotating shaft are respectively rotatably connected with the inner walls of the two sides of the workbench, and the upper end of the rotating shaft penetrates through the workbench and then is connected with the rotary table;

2. The flaring device for tubular metal pieces according to claim 1, wherein two locking mechanisms for locking the rotating table are further arranged in the inner cavity of the working table, the two locking mechanisms are symmetrically arranged, each locking mechanism comprises a locking box, the locking box is fixedly arranged on the inner wall of the working table, a second moving plate and a cam are arranged in the locking box, the second moving plate is positioned above the cam, a pin is arranged at the top end of the second moving plate, second telescopic rods are arranged at the top ends of the second moving plate on two sides of the pin, the other end of each second telescopic rod is connected with the inner wall of the working table, a second spring is sleeved on each second telescopic rod, one end of each second spring abuts against the top end of the corresponding second moving plate, the other end of each second spring abuts against the inner wall of the working table, and two locking holes are formed in the rotating table, the locking mechanism comprises a locking box, a locking hole, a working table, a pin, a cam, a rotating rod, a belt wheel, a belt, a second driving motor, a controller and a controller, wherein the locking hole is symmetrically arranged and is respectively positioned at two sides of a connecting line between lower forming dies, the working table is provided with a pin hole matched with the pin, the pin hole corresponds to the locking hole, one end, far away from the second moving plate, of the pin is positioned in the pin hole, the cam is connected with the rotating rod, the other end of the rotating rod penetrates through the locking box and extends out of the locking box, the rotating rod is provided with the belt wheel, the belt wheel is sleeved with the belt, the belt wheel is in transmission connection through the belt, one locking box is fixedly provided with.

3. The flaring device of claim 2, wherein said turntable is provided with a dust cap for covering said locking hole.

4. The flaring device of claim 1, wherein screw bases are mounted on the left side and the right side of the turntable on the workbench, the screw bases are of a hollow structure, and screw rods are in threaded connection with the screw bases.

5. The flaring device for tubular metal pieces according to claim 1, wherein guide rods are mounted on the left side and the right side of the top end of the pressing plate, and the other ends of the guide rods penetrate through the frame and extend to the upper side of the frame.