CN216801416U - Pipe end forming equipment for straight pipe - Google Patents

Abstract

The utility model discloses pipe end forming equipment for a straight pipe, which comprises a rack, a feeding mechanism, a forming mechanism, a material receiving frame and a conveying mechanism, wherein the forming mechanism comprises a clamping component, a forming component and a driving component; the forming assembly comprises a mandrel; the driving assembly comprises a first driving assembly for driving the plurality of external mold single bodies to move and a second driving assembly for driving the mandrel to move; the conveying mechanism comprises a gripper and a third driving assembly; the feeding mechanism comprises a storage bin, a transmission assembly and a turnover assembly, wherein the transmission assembly comprises a conveying module and a pushing module; the turnover component comprises an inserting part, a fourth driving component and a material storage area. The pipe end forming equipment disclosed by the utility model can realize the posture adjustment of the straight pipe and improve the processing efficiency; and the precision of the processing and forming of the pipe end of the straight pipe can be improved.

Description

Pipe end forming equipment for straight pipe

Technical Field

The utility model relates to the field of pipe end forming equipment, in particular to pipe end forming equipment for a straight pipe.

Background

At present, because part of the straight pipe is designed to be a clamping and pressing pipe fitting, after the straight pipe is formed, the pipe end of the straight pipe needs to be further processed. The processing device in the prior art directly outputs straight pipes one by one through the conveyor belt, and the straight pipes are clamped to the pipe end forming equipment through the mechanical arm to be processed.

However, in an actual machining process, the machining apparatus described above has the following problems: (1) the posture of the straight pipe directly conveyed by the conveyor belt cannot be matched with the pipe end forming equipment, and the straight pipe needs to be adjusted by a manipulator, so that the processing efficiency is influenced, and the production cost is increased; (2) when in processing, the inner die rotates in the pipe end ceaselessly, the outer die needs to have a certain distance with the periphery of the pipe end of the straight pipe so as to expand the pipe end, the outer die and the outer die can not effectively fix the straight pipe, the straight pipe needs to be clamped by manpower or a manipulator in the whole process, the cost of manpower and material resources is greatly increased, and meanwhile, the forming quality of the pipe end of the straight pipe can be influenced if the clamping of the manpower or the manipulator is not firm; (3) the outer die is clamped inwards through the clamping plate, the outer die can only be matched with straight pipes with fixed sizes due to the fact that the size of the clamping plate is fixed, and dies with different sizes need to be arranged when the straight pipes with different pipe diameters are machined, and cost is further increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a pipe end forming device for a straight pipe.

In order to achieve the purpose, the utility model adopts the technical scheme that:

a pipe end forming apparatus for a straight pipe, comprising: a frame, a feeding mechanism, a forming mechanism, a material receiving frame and a conveying mechanism which are arranged on the frame,

the forming mechanism comprises a clamping assembly, a forming assembly and a driving assembly, wherein the clamping assembly comprises an inner die and an outer die, the inner die is used for being inserted into the end of the straight pipe, the outer die is arranged on the periphery of the end of the straight pipe, the inner die comprises a plurality of inner die single bodies which are arranged around the circumferential direction and can move along the direction close to or far away from the surrounding center, and core grooves are formed among the inner die single bodies, and the outer die comprises a plurality of outer die single bodies which are arranged around the circumferential direction of the inner die and can move along the direction close to or far away from the inner die; the forming assembly comprises a mandrel extending into the mandrel groove, the mandrel can move along the length direction corresponding to the end of the straight pipe, and the mandrel is further synchronously arranged around the axis corresponding to the end of the straight pipe in a rotating manner; the driving assembly comprises a first driving assembly for driving the plurality of outer die single bodies to move and a second driving assembly for driving the mandrel to move;

the transfer mechanism includes: the gripper can move along the arrangement direction of the feeding mechanism, the forming mechanism and the material receiving frame and can move along the up-and-down direction, and the third driving assembly;

the feeding mechanism comprises a storage bin for containing the straight pipe, a transmission assembly for transmitting the straight pipe and a turnover assembly, wherein the transmission assembly comprises a conveying module which is positioned above the storage bin and is provided with a conveying channel, and a pushing module for pushing the straight pipe in the storage bin to the conveying channel; the overturning assembly comprises an inserting part matched with the pipe end of the straight pipe, a fourth driving assembly used for driving the inserting part to overturn, and a material storage area communicated with the discharging end of the conveying channel;

the inserting part is provided with a first state and a second state, and when the inserting part is in the first state, the inserting part faces the material storage area and is in butt joint with the pipe end of the straight pipe; when the plug-in connector is in the second state, the plug-in connector is turned upwards.

Preferably, the frame has material loading station and two at least shaping stations, feed mechanism sets up the material loading station, shaping mechanism sets up shaping station, transport mechanism still includes along material loading station to the guide rail that the direction of shaping station extends, along the extending direction slidable of guide rail locates at least two slides on the guide rail, the tongs is located along upper and lower direction slidable on the slide, third drive assembly is including being used for driving first power spare of slide motion, being used for driving the second power spare of tongs motion.

Preferably, the inner die comprises an inner die holder and an inner die head formed at the end of the inner die holder and used for inserting the end of the straight pipe; the outer die comprises an outer die holder and an outer die ring formed at the end part of the outer die holder, a die cavity used for containing the inner die holder is arranged in the outer die holder, and the outer die ring is positioned on the periphery of the end part of the straight tube.

Further preferably, the core groove is radially reduced along the direction from the inner die holder to the inner die head, the core shaft is conical and the contour of the core shaft is matched with that of the core groove, and the axis of the core shaft is parallel to the axis of the end of the corresponding straight pipe.

Preferably, the first driving assembly comprises a plurality of sliding blocks which are arranged around the circumference of the outer die and are arranged in a sliding manner along a direction close to or far away from the inner die, and a plurality of third power parts which are respectively used for driving the plurality of sliding blocks to move in a one-to-one correspondence manner, and the plurality of sliding blocks and the plurality of outer die single bodies are in one-to-one correspondence and are connected with each other.

Further preferably, the first driving assembly further includes a first guide groove formed in the slider, a second guide groove formed between two adjacent sliders, and a first guide block and a second guide block arranged on the frame, the first guide groove extends along a sliding direction of the slider, the first guide block is embedded in the first guide groove, and the second guide block is embedded in the second guide groove.

Preferably, the second drive assembly includes the rotatory seat in the frame, enclose and locate around corresponding the rotatable locating of the axial lead of straight tube pipe end synchronous tooth, be used for driving of roating seat pivoted fourth power piece, respectively with the output of fourth power piece with synchronous tooth looks drive connection's hold-in range, place in be used for driving in the roating seat the dabber is along corresponding the fifth power piece of the length direction motion of straight tube pipe end, the dabber insert locate in the roating seat and with the output coaxial coupling of fifth power piece.

Preferably, the pushing module comprises multiple stages of pushing blocks which are sequentially connected and gradually rise, each stage of pushing block extends along the length direction of the straight pipe and is arranged in a lifting manner, and the top surface of each stage of pushing block is inclined downwards towards the direction close to the conveying module.

Preferably, the conveying module comprises a conveying belt, a guide plate and a sixth power member for driving the conveying belt to run, the conveying belt is connected with the highest pushing module, and the conveying channel is formed between the conveying belt and the guide plate.

Preferably, the transmission assembly further comprises a backflow module for returning the redundant straight pipe to the storage bin, the backflow module comprises a bottom plate arranged on one side of the discharge end of the conveying channel and a baffle plate arranged on one side of the bottom plate, and the bottom plate is arranged in a manner of inclining downwards from the conveying channel to the storage bin.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

(1) the inner die only has the flaring forming function, and cannot rotate after being inserted into the end of the straight pipe, so that the straight pipe can be fixed, the straight pipe does not need to be manually clamped or a mechanical arm is not additionally arranged, the cost is saved, and the phenomenon that the forming quality of the end of the straight pipe is influenced due to the fact that the straight pipe is not firmly clamped is avoided;

(2) the inner die is inserted into the pipe end of the straight pipe to realize the fixing of the straight pipe, the mandrel extends into the core groove and synchronously rotates to realize the forming of the pipe end, and the inner die and the mandrel play their roles respectively, so that the clamping and fixing of the straight pipe are realized, and the forming quality of the straight pipe cannot be influenced;

(3) the outer die is divided into a plurality of outer die single bodies, and the plurality of outer die single bodies are respectively driven to move by the plurality of driving assemblies, so that the outer die can be adapted to various straight pipes with different sizes, and the cost is saved;

(4) through the setting of upset subassembly, can realize the upset of straight tube to the gesture of adjustment straight tube makes the straight tube gesture can with the centre form phase-match, so, the tongs can directly snatch the straight tube and shift to the shaping station and process, very big promotion machining efficiency.

Drawings

FIG. 1 is a schematic structural view of a pipe end forming apparatus in an embodiment of the present invention;

FIG. 2 is a schematic top view of a forming mechanism in an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2 with the fixation plate removed;

FIG. 4 is an enlarged schematic view of FIG. 3 at B;

fig. 5 is a schematic structural diagram of a feeding mechanism in an embodiment of the present invention.

In the figure: 1. a frame; 2. a material receiving frame;

r, a forming mechanism; 3. a clamping assembly; 3a, an inner mold; 3a1, inner mold monomer; 3a2, core barrel; 3a3, inner die holder; 3a4, inner die; 3a5, a limiting surface; 3a6, bumps; 3b, an outer die; 3b1, outer mold monomer; 3b2, an outer die holder; 3b3, outer mould ring; 3b4, a mold cavity; 3b5, groove; 4. a molding assembly; 4a, a mandrel; 5. a drive assembly; 5a, a first driving component; 5a1, slider; 5a2, a third power member; 5a3, a first guide groove; 5a4, second guide groove; 5a5, a first guide block; 5a6, second guide block; 5a7, fixing plate; 5b, a second driving component; 5b1, a swivel; 5b2, synchronizing teeth; 5b3, a fifth power element;

s, a conveying mechanism; 6. a gripper; 7. a third drive assembly; 7a, a first power part; 7b, a second power member; 11. a guide rail; 12. a slide base;

t, a feeding mechanism; 8. a storage bin; 9. a transmission assembly; 9a, a conveying module; 9a1, conveying channel; 9a2, conveyor belt; 9a3, guide plate; 9a4, sixth power element; 9b, a pushing module; 9b1, a pushing block; 9c, a reflux module; 9c1, bottom plate; 9c2, baffles; 10. a turnover assembly; 10a, a plug part; 10b, a fourth drive assembly; 10c, a material storage area;

13. a hydraulic control box; 14. an electrical control box;

H. a straight tube.

Detailed Description

The technical scheme of the utility model is further explained by combining the attached drawings.

The utility model relates to an improvement on pipe end forming equipment of a straight pipe, and the improved pipe end forming equipment, on one hand, the posture adjustment of the straight pipe is realized through the arrangement of a turnover assembly, so that the posture of the straight pipe can be matched with that of an internal mold, and the processing efficiency is improved; on the other hand, the inner die is divided into a plurality of inner die single bodies, the outer die is divided into a plurality of outer die single bodies, and meanwhile, a mandrel is independently arranged for rotation forming, so that the precision of machining and forming of the end of the straight pipe is greatly improved.

Referring to fig. 1-5, there is shown a pipe end forming apparatus for a straight pipe, comprising: the frame 1, locate feed mechanism T, forming mechanism R, receipts material frame 2 on the frame 1 to and transport mechanism S.

In this example, the frame 1 has a feeding station and at least two forming stations, the feeding mechanism T is disposed at the feeding station, and the at least two forming mechanisms R are disposed at the at least two forming stations respectively. Through the multistation setting, machining efficiency has been improved.

As shown in fig. 2 to 4, the forming mechanism R includes a clamping assembly 3, a forming assembly 4 and a driving assembly 5, the clamping assembly 3 includes an inner mold 3a1 for inserting the end of the straight pipe H pipe, and an outer mold 3b provided on the outer periphery of the end of the straight pipe H pipe, the inner mold 3a1 includes a plurality of inner mold single bodies 3a1 arranged around the circumferential direction and capable of moving in a direction close to or away from the surrounding center, and a core groove 3a2 formed between the plurality of inner mold single bodies 3a1, and the outer mold 3b includes a plurality of outer mold single bodies 3b1 arranged around the circumferential direction of the inner mold 3a1 and capable of moving in a direction close to or away from the inner mold 3a 1; the forming assembly 4 comprises a mandrel 4a which is used for extending into the mandrel groove 3a2, the mandrel 4a can move along the length direction of the end of the corresponding straight pipe H, and the mandrel 4a is also synchronously arranged around the axis of the end of the corresponding straight pipe H in a rotating way; the driving assembly 5 comprises a first driving assembly 5a for driving the plurality of outer die units 3b1 to move, and a second driving assembly 5b for driving the mandrel 4a to move.

In this way, during machining, the inner die 3a1 is inserted into the pipe end of the straight pipe H, the outer die 3b is arranged on the periphery of the pipe end, the distance between the outer die 3b and the pipe end of the straight pipe H is designed according to the expanding size of the pipe end of the straight pipe H, the second driving assembly 5b drives the outer die single bodies 3b1 to move in place, then the first driving assembly 5a drives the mandrel 4a to extend into the core groove 3a2 and rotate synchronously, the inner die single bodies 3a1 are pushed to move outwards and expand the pipe end of the straight pipe H, then the mandrel 4a withdraws from the core groove 3a2 and then extends into the core groove 3a2 again and rotates synchronously, and the process is repeated for multiple times to form the pipe end of the straight pipe H.

Specifically, the inner die 3a1 includes an inner die holder 3a3, an inner die head 3a4 formed at the end of the inner die holder 3a3 for inserting the end of a straight pipe H; the outer die 3b comprises an outer die holder 3b2 and an outer die ring 3b3 formed at the end of the outer die holder 3b2, a die cavity 3b4 for accommodating the inner die holder 3a3 is formed in the outer die holder 3b2, and the outer die ring 3b3 is located on the outer periphery of the end of the straight tube H. The core groove 3a2 is radially reduced along the direction from the inner die holder 3a3 to the inner die 3a4, the core shaft 4a is conical and the outline thereof is matched with the core groove 3a2, and the axial lead of the core shaft 4a is parallel to the axial lead of the end of the corresponding straight pipe H.

In this way, since the profile of the mandrel 4a is matched with the core groove 3a2, the diameter of the mandrel is gradually increased along the direction away from the core groove 3a2, and the mandrel can gradually enlarge the core groove 3a2 in the process of extending into the core groove 3a2, so that the outward movement of the inner mold single bodies 3a1 is realized; while the arrangement of the cavity 3b4 provides a margin of space for outward movement of the inner die shoe 3a 3.

Further, the inner die holder 3a3 is truncated cone-shaped and radially inwardly shrinks along the direction close to the inner die head 3a4, a limiting surface 3a5 for abutting against the end of the straight pipe H pipe is formed at one end, close to the inner die head 3a4, of the inner die holder 3a3, the diameter of the limiting surface 3a5 is larger than that of the end of the straight pipe H pipe, and the inner die head 3a4 is cylindrical and is matched with the inner cavity of the end of the straight pipe H pipe.

Further, the inner die 3a1 further includes a protrusion 3a6 surrounding the outer peripheral side of the inner die 3a4, and the outer die 3b further includes a groove 3b5 opened on the inner annular surface of the outer die ring 3b3 and matching with the protrusion 3a 6. Through the arrangement of the protrusions 3a6 and the grooves 3b5, a convex ring can be formed on the end of the straight pipe H during the outward movement of the inner mold units 3a 1. Here, the protrusion 3a6 and the groove 3b5 are designed as matching parts for forming a convex ring, but of course, other matching parts can be designed by those skilled in the art according to the connection requirement of the tube end of the straight tube H to process structures of other shapes.

In the present embodiment, the first driving assembly 5a includes a plurality of sliding blocks 5a1 arranged around the circumference of the outer mold 3b and slidably disposed along a direction close to or away from the inner mold 3a1, a plurality of third power members 5a2 respectively used for driving the plurality of sliding blocks 5a1 to move in a one-to-one correspondence manner, and a plurality of sliding blocks 5a1 are in one-to-one correspondence with and connected with the plurality of outer mold single bodies 3b 1. The third power member 5a2 here is a cylinder. The plurality of oil cylinders respectively drive the plurality of sliding blocks 5a1 to move, so that the stability of the movement of the sliding blocks 5a1 is ensured, and the clamping effect of the outer die 3b is also ensured.

Preferably, the first driving assembly 5a further includes a first guide groove 5a3 opened on the slider 5a1, a second guide groove 5a4 formed between two adjacent sliders 5a1, a first guide block 5a5 and a second guide block 5a6 provided on the frame 1, the first guide groove 5a3 extends along the sliding direction of the slider 5a1, the first guide block 5a5 is engaged in the first guide groove 5a3, and the second guide block 5a6 is engaged in the second guide groove 5a 4. In this way, during the sliding of the plurality of sliders 5a1, the first guide groove 5a3 and the first guide block 5a5, and the second guide groove 5a4 and the second guide block 5a6 cooperate with each other, so that the sliding direction of the slider 5a1 can be ensured, the slider 5a1 is prevented from deviating, and the clamping effect is ensured.

In this example, the first driving assembly 5a further includes a fixing plate 5a7 disposed on the frame 1, and the first guide block 5a5 and the second guide block 5a6 are both embedded in the fixing plate 5a7 and are arranged around the fixing plate 5a7 at intervals and offset in the circumferential direction.

Further, the second driving assembly 5b includes a rotating base 5b1 rotatably disposed on the frame 1 around the axis of the end of the corresponding straight pipe H, a synchronizing tooth 5b2 disposed around the outer periphery of the rotating base 5b1, a fourth power member for driving the rotating base 5b1 to rotate, a timing belt in transmission connection with the output end of the fourth power member and the synchronizing tooth 5b2, and a fifth power member 5b3 built in the rotating base 5b1 for driving the mandrel 4a to move along the length direction of the end of the corresponding straight pipe H, wherein the mandrel 4a is inserted in the rotating base 5b1 and coaxially connected with the output end of the fifth power member 5b 3.

Here, the fourth power element is a servo motor, the fifth power element 5b3 is an oil cylinder, and the output shaft of the servo motor drives the synchronous teeth 5b2 on the periphery of the rotating base 5b1 to rotate, and further drives the rotating base 5b1 to rotate, so as to realize the rotation of the mandrel 4 a; and the movement of the mandrel 4a in the length direction of the end of the straight pipe H can be realized through the extension and contraction of the piston rod of the oil cylinder.

Referring to fig. 1, the conveying mechanism S includes a guide rail 11 extending along a direction from the feeding station to the forming station, at least two sliding bases 12 slidably disposed on the guide rail 11 along an extending direction of the guide rail 11, a gripper 6 slidably disposed on the sliding bases 12 along an up-down direction, and a third driving assembly 7, where the third driving assembly 7 includes a first power member 7a for driving the sliding bases 12 to move and a second power member 7b for driving the gripper 6 to move.

The first power part 7a and the second power part 7b are both matching parts of a servo motor and a screw rod, and the screw rod is driven to rotate through the servo motor, so that the sliding seat 12 and the hand grip 6 on the screw rod can move.

Referring to fig. 5, the feeding mechanism T includes a storage bin 8 for accommodating the straight tube H, a transmission assembly 9 for transmitting the straight tube H, and a turnover assembly 10, where the transmission assembly 9 includes a conveying module 9a located above the side of the storage bin 8 and having a conveying channel 9a1, and a pushing module 9b for pushing the straight tube H in the storage bin 8 into the conveying channel 9a 1; the overturning assembly 10 comprises an inserting part 10a matched with the end of the straight pipe H, a fourth driving assembly 10b used for driving the inserting part 10a to overturn, and a material storage area 10c communicated with the discharging end of the conveying channel 9a 1. The fourth drive assembly 10b here is a servomotor.

The inserting part 10a has a first state and a second state, and when the inserting part 10a is in the first state, the inserting part 10a faces the material storage area 10c and is abutted with the pipe end of the straight pipe; when in the second state, the socket 10a is turned upward.

Therefore, through the matching of the conveying module 9a, the pushing module 9b and the overturning assembly 10, the posture of the straight pipe H can be quickly adjusted, and the gripper 6 can grab the straight pipe conveniently.

Further, the pushing module 9b comprises multiple stages of pushing blocks 9b which are sequentially connected and gradually rise, each stage of pushing block 9b extends along the length direction of the straight pipe H and is arranged in a lifting manner, and the top surface of each stage of pushing block 9b is arranged in a downward inclined manner towards the direction close to the conveying module 9 a. Set up like this, can upwards transmit straight tube H step by step, and when adjacent two-stage ejector pad 9b links up, straight tube H on the preceding one-level ejector pad 9b can roll to the ejector pad 9b of back one-level on, has guaranteed transmission efficiency.

The conveying module 9a includes a conveying belt 9a2, a guide plate 9a3, and a sixth power member 9a4 for driving the conveying belt 9a2 to run, where the sixth power member 9a4 is a servo motor, the conveying belt 9a2 is connected to the highest-level pushing module 9b, and a conveying channel 9a1 is formed between the conveying belt 9a2 and the guide plate 9a 3. The guide plate 9a3 includes a top plate parallel to the conveyor belt 9a2, and a side plate provided on the conveyor belt 9a2 side and connected to the top plate.

Preferably, the conveying assembly 9 further includes a backflow module 9c for returning the excess straight pipe H to the storage bin 8, the backflow module 9c includes a bottom plate 9c1 disposed on the discharging end side of the conveying channel 9a1, and a baffle plate 9c2 disposed on the bottom plate 9c1 side, and the bottom plate 9c1 is disposed to be inclined downward from the conveying channel 9a1 toward the storage bin 8. In this way, after the conveyor belt 9a2 conveys the straight tube H to the stock area 10c, if the straight tube H is already in the turnover assembly 10, the excess straight tube H can flow back to the storage bin 8 under the action of the backflow module 9 c.

The pipe end forming apparatus in this example further includes a hydraulic control box 1311 for controlling the cylinders, and an electric control box 1412 for controlling the servo motor.

The following specifically explains the working process of this embodiment: the pushing module 9b conveys the straight pipe H upwards to the conveying channel 9a1 step by step, then the conveying channel 9a1 conveys the straight pipe H to the overturning assembly 10, the inserting end on the overturning assembly 10 is inserted into the pipe end of the straight pipe H and drives the straight pipe H to overturn, after overturning, the gripper 6 grips the straight pipe H and lifts the straight pipe H, so that the pipe end of the straight pipe H is separated from the inserting part 10a, then the straight pipe H is conveyed to the forming station, the gripper 6 descends after conveying to the place, the pipe end of the straight pipe H is sleeved on the inner mold 3a1, meanwhile, the outer mold 3b is arranged on the periphery of the pipe end, the distance between the outer mold 3b and the pipe end of the straight pipe H is designed according to the external expansion size of the pipe end of the straight pipe H, and the second driving assembly 5b drives the plurality of outer mold monomers 3b1 to move to the place, then the first driving assembly 5a drives the mandrel 4a to extend into the core groove 3a2 and synchronously rotate, so as to push the plurality of inner mold monomers 3a1 to move outwards and expand the pipe end of the straight pipe H, and then the mandrel 4a withdraws from the core groove 3a2 and then extends into the core groove 3a2 again and rotates synchronously, the process is repeated for a plurality of times, the pipe end of the straight pipe H is formed for a plurality of times, after the processing is finished, the gripper 6 moves to the upper part of the straight pipe H again, then descends to grip the straight pipe H, drives the straight pipe H to ascend to be separated from the inner die 3a1 and then moves towards the material receiving frame 2, and finally the straight pipe H is put into the material receiving frame 2.

The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (10)

1. A pipe end forming apparatus for a straight pipe, comprising: the frame is located feed mechanism, forming mechanism, receipts material frame in the frame to and transport mechanism, its characterized in that:

the forming mechanism comprises a clamping assembly, a forming assembly and a driving assembly, wherein the clamping assembly comprises an inner die and an outer die, the inner die is used for being inserted into the end of the straight pipe, the outer die is arranged on the periphery of the end of the straight pipe, the inner die comprises a plurality of inner die single bodies which are arranged around the circumferential direction and can move along the direction close to or far away from the surrounding center, and core grooves are formed among the inner die single bodies, and the outer die comprises a plurality of outer die single bodies which are arranged around the circumferential direction of the inner die and can move along the direction close to or far away from the inner die; the forming assembly comprises a mandrel extending into the mandrel groove, the mandrel can move along the length direction corresponding to the end of the straight pipe, and the mandrel is further synchronously arranged around the axis corresponding to the end of the straight pipe in a rotating manner; the driving assembly comprises a first driving assembly for driving the plurality of outer die single bodies to move and a second driving assembly for driving the mandrel to move;

the transfer mechanism includes: the gripper can move along the arrangement direction of the feeding mechanism, the forming mechanism and the material receiving frame and can move along the up-and-down direction, and the third driving assembly;

the feeding mechanism comprises a storage bin for containing the straight pipe, a transmission assembly for transmitting the straight pipe and a turnover assembly, wherein the transmission assembly comprises a conveying module which is positioned above the storage bin and is provided with a conveying channel, and a pushing module for pushing the straight pipe in the storage bin to the conveying channel; the overturning assembly comprises an inserting part matched with the pipe end of the straight pipe, a fourth driving assembly used for driving the inserting part to overturn, and a material storage area communicated with the discharging end of the conveying channel;

the inserting part is provided with a first state and a second state, and when the inserting part is in the first state, the inserting part faces the material storage area and is in butt joint with the pipe end of the straight pipe; when the plug-in connector is in the second state, the plug-in connector is turned upwards.

2. The pipe end forming apparatus for a straight pipe according to claim 1, wherein: the frame has material loading station and two at least shaping stations, feed mechanism sets up the material loading station, shaping mechanism sets up the shaping station, transport mechanism still includes along the material loading station extremely the guide rail that the direction of shaping station extends, along extending direction slidable of guide rail locates two at least slides on the guide rail, the tongs is located along upper and lower direction slidable on the slide, third drive assembly is including being used for the drive the first power spare of slide motion, be used for the drive the second power spare of tongs motion.

3. The pipe end forming apparatus for a straight pipe according to claim 1, wherein: the inner die comprises an inner die holder and an inner die head which is formed at the end part of the inner die holder and is used for inserting the end of the straight pipe; the outer die comprises an outer die holder and an outer die ring formed at the end part of the outer die holder, a die cavity used for containing the inner die holder is arranged in the outer die holder, and the outer die ring is positioned on the periphery of the end part of the straight tube.

4. The pipe end forming apparatus for a straight pipe according to claim 3, wherein: the core groove is radially reduced along the direction from the inner die holder to the inner die head, the core shaft is conical and the outline of the core shaft is matched with the core groove, and the axial lead of the core shaft is parallel to the axial lead corresponding to the end of the straight pipe.

5. The pipe end forming apparatus for a straight pipe according to claim 1, wherein: the first driving assembly comprises a plurality of sliding blocks which are arranged around the circumferential direction of the outer die and are arranged in a sliding mode along the direction close to or far away from the inner die, and a plurality of third power parts which are used for driving the sliding blocks to move in a one-to-one correspondence mode respectively, and the sliding blocks are in one-to-one correspondence with the outer die single bodies and are connected with the outer die single bodies.

6. The pipe end forming apparatus for a straight pipe according to claim 5, wherein: the first driving assembly further comprises a first guide groove formed in the sliding block, a second guide groove formed between the two adjacent sliding blocks, a first guide block and a second guide block arranged on the rack, the first guide groove extends along the sliding direction of the sliding block, the first guide block is embedded in the first guide groove in a clamping mode, and the second guide block is embedded in the second guide groove in a clamping mode.

7. The pipe end forming apparatus for a straight pipe according to claim 1, wherein: the second drive assembly includes round corresponding rotatable locating of the axial lead of straight tube pipe end roating seat in the frame, enclose and locate the synchronous tooth of roating seat periphery, be used for the drive roating seat pivoted fourth power piece, respectively with the output of fourth power piece with synchronous tooth looks drive connection's hold-in range, place in be used for the drive in the roating seat the dabber is along corresponding the fifth power piece of the length direction motion of straight tube pipe end, the dabber insert locate in the roating seat and with the output coaxial coupling of fifth power piece.

8. The pipe end forming apparatus for a straight pipe according to claim 1, wherein: the pushing module comprises multiple stages of pushing blocks which are sequentially connected and gradually rise, each stage of pushing block extends along the length direction of the straight pipe and is arranged in a liftable mode, and the top surface of each stage of pushing block is arranged in a downward-inclined mode towards the direction close to the conveying module.

9. The pipe end forming apparatus for a straight pipe according to claim 1, wherein: the conveying module comprises a conveying belt, a guide plate and a sixth power part for driving the conveying belt to run, the conveying belt is connected with the top pushing module, and a conveying channel is formed between the conveying belt and the guide plate.

10. The pipe end forming apparatus for a straight pipe according to claim 1, wherein: the conveying assembly further comprises a backflow module used for returning the redundant straight pipes to the storage bin, the backflow module comprises a bottom plate arranged on one side of the discharge end of the conveying channel and a baffle arranged on one side of the bottom plate, and the bottom plate is arranged from the conveying channel to the storage bin in a downward inclined mode.

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