CN115121641A

CN115121641A - Pipe making equipment

Info

Publication number: CN115121641A
Application number: CN202210963219.6A
Authority: CN
Inventors: 陈乐利; 董晓辉; 赵腾; 罗锐; 程晓农; 刘天; 丁恒楠
Original assignee: Jiangsu University
Current assignee: Jiangsu University
Priority date: 2022-08-11
Filing date: 2022-08-11
Publication date: 2022-09-30

Abstract

The invention discloses a pipe making equipment, comprising a cold drawing machine and a pipe bending machine. The cold drawing machine adopts a three-pass cold-drawing module to realize one-time cold-drawing and high-quality forming of an ultra-long pipe. The mold increases the deformation amount of one cold drawing, which ensures the accuracy and quality of large deformation cold drawing, and saves the production process; the multi-pass bending roller of the pipe bending machine can realize that the diameter and pitch of the pipe are not affected by the force fluctuation during the bending process Therefore, the bending accuracy can be improved. At the same time, the shaping pressure of the three forming roller shafts of the swing shaft, the intermediate shaft and the third shaft is stable, and the relative position between the swing shaft and the intermediate shaft and the third shaft can be changed by swinging the swing shaft to determine the diameter of the pipe. , the size of the pipe can be flexibly adjusted without changing the mold, and the entire pipe is in a good state of stress. The pipe-making equipment of the invention has the advantages of simple operation and low cost, and can realize the simultaneous processing and forming of pipes with complex shapes, good surface quality and high geometric dimensional accuracy, and can satisfy high-quality and high-efficiency production.

Description

Pipe manufacturing equipment

Technical Field

The invention relates to the technical field of machining, in particular to a pipe manufacturing device.

Background

The cold drawing machine is equipment for drawing a large-diameter pipe into a smaller-diameter pipe at normal temperature, the existing cold drawing machine adopts a special drawing device to pass through a sealing and sizing secondary die to realize a cold drawing process on a blank pipe, the method needs to continuously replace a die for the long-length pipe, the operation is inconvenient, the processing cost is increased, and meanwhile, the traction acting force of the device is exerted by a heavy roller chain, the drawing speed is influenced, and the surface quality of the pipe is reduced; the bending machine is a device for winding or roll-bending a cold-drawn overlong straight pipe into a coil pipe according to a certain pipeline, and because the size parameters of the pipe required under different service conditions are different, the processing dies required by a common bending machine are complex and various, the resilience amount during winding is uncontrollable, the production cost is high, and meanwhile, the existing bending supporting roller is insufficient, so that the stress fluctuation of the pipe is large during bending, and the precision is reduced.

Disclosure of Invention

The invention aims to provide a pipe manufacturing device, which aims to solve the problems in the prior art, and the pipe manufacturing device can realize the bending and forming immediately after cold drawing by welding or fastening a cold drawing machine and a pipe bending machine through shaft connection, thereby greatly improving the pipe processing and forming efficiency.

In order to achieve the purpose, the invention provides the following scheme: the invention provides a pipe making device, which comprises

The cold drawing machine comprises a cold drawing die, a clamping device capable of moving along a rail and a traction device connected with the clamping device, the cold drawing die comprises a cold drawing module, a fixed seat is arranged in the cold drawing module, a connecting plate is arranged on the fixed seat, a micro-reducing sealing die, a reducing die and a sizing die are sequentially arranged on the connecting plate along the advancing direction of a pipe, and the pipe sequentially passes through the micro-reducing sealing die, the reducing die and the sizing die on the connecting plate to be subjected to cold drawing forming; the clamping device is used for clamping the pipe and driving the pipe to move; the traction device comprises a pulley block, a steel wire rope and a winding wheel, the pulley block is positioned at the feeding end of the cold-drawing machine, the winding wheel is positioned at the blanking end of the cold-drawing machine, one end of the steel wire rope is used for being directly connected with the clamping device or connected with the clamping device after penetrating through the pulley block, and the winding wheel driven by a motor is used for pulling the other end of the steel wire rope; and

the pipe bending machine is fixedly arranged at the blanking end of the cold drawing machine through welding or coupling and comprises a host machine and a material conveying table, a feeding mechanism, a winding mechanism and a supporting mechanism are arranged on the host machine, and the feeding mechanism is used for conveying the pipe subjected to cold drawing by the cold drawing machine to the winding mechanism; main frames are arranged at two ends of a base of the main frame, auxiliary frames are symmetrically arranged on the inner sides of the two main frames, the winding mechanism comprises a hydraulic cylinder, a swing shaft, a middle shaft and a third shaft, a telescopic rod of the hydraulic cylinder is connected with the swing shaft arranged between the two main frames, the swing shaft is connected with the middle shaft arranged between the two main frames through a swing arm, and the middle shaft is connected with the third shaft arranged between the two main frames through the swing arm; the supporting mechanism is used for maintaining the stable stress of the pipe during bending; the material conveying platform is provided with a stand column, the stand column is provided with a material conveying arm, and the material conveying arm is used for inserting an inner cylinder of a bent pipe to receive materials.

In one embodiment, the middle cavity of the reducing die and the middle cavity of the micro reducing sealing die are connected with a radial lubricating oil delivery pipe.

In one embodiment, the pulley block comprises a first fixed pulley, a second movable pulley and a second fixed pulley, the steel wire rope comprises a thin steel wire rope and a thick steel wire rope, the winding wheel comprises a large winding wheel and a small winding wheel, one end of the thin steel wire rope sequentially bypasses the first movable pulley and the first fixed pulley and then is connected with the clamping device, and the other end of the thin steel wire rope bypasses the second fixed pulley and then is connected with the small winding wheel; two ends of the thick steel wire rope are respectively connected with the clamping device and the large winding wheel; one end of a transmission shaft of the small winding wheel is provided with a large gear, one end of a transmission shaft of the large winding wheel is provided with a small gear meshed with the large gear, and the large gear is connected with the motor.

In one embodiment, a lead screw capable of adjusting the tension of the thin steel wire rope is arranged on the movable pulley; the output end of the motor is provided with a speed reducer, and the large gear is in transmission connection with the speed reducer.

In one embodiment, the cold-drawing machine further comprises a guide clamp, a plurality of guide clamps are arranged on the cold-drawing machine at equal intervals along the advancing direction of the pipe, a guide rail is arranged at the top of a rack of the cold-drawing machine and corresponds to the guide rail, the guide clamp comprises a bracket and a clamping clamp, the bracket can move along the guide rail, an electromagnet is mounted on the bracket, and a connecting shaft is arranged at the lower end of the electromagnet; the clamping pliers are composed of two intersected pliers arms, and the pipe is clamped between the two pliers arms; when the electromagnet is powered on, the two tong arms are in an open state.

In one embodiment, a nylon protective sleeve is arranged in the groove at the lower end of the forceps arm.

In one embodiment, the feeding mechanism comprises a speed reducer and a plurality of feeding rollers, wherein the output end of the speed reducer is provided with a small chain wheel, the small chain wheel is in transmission connection with a large chain wheel on an auxiliary frame through a roller chain, the large chain wheel is in transmission connection with a gear set, each gear in the gear set is in mesh transmission in pairs, each gear is respectively installed at one end of the plurality of feeding rollers, and a pipe is conveyed to the winding mechanism through the feeding rollers.

In one embodiment, the supporting mechanism comprises a primary supporting rod, a secondary supporting rod and vertical plates, the primary supporting rod is arranged on the outer side of the middle of a pipe on the main frame, the tops of the two main frames are connected with the vertical plates, the vertical plates are provided with vertical sliding blocks, one sides of the vertical sliding blocks, which are opposite to the vertical plates, are provided with horizontal sliding blocks, connecting shafts are arranged in slots in the middle of the horizontal sliding blocks, and the secondary supporting rollers are arranged on the connecting shafts.

In one embodiment, the material conveying arm is provided with a material receiving roller.

Compared with the prior art, the invention has the following beneficial technical effects:

the pipe making equipment comprises a cold drawing machine and a pipe bending machine, wherein the cold drawing machine adopts three-pass cold drawing modules to realize one-time cold drawing high-quality molding of the ultra-long pipe, and the deformation of one-time cold drawing is increased through three-pass cold drawing dies with different deformations, so that the precision and the quality of large-deformation cold drawing are ensured, and the production process is saved; the pipe bender can realize that pipe diameter and pitch are not influenced by the fluctuation of atress and change at the curved system in-process of many times bending roller to improve the return bend precision, the design pressure of three shaping roller axles of oscillating axle, jackshaft and third axle is stable simultaneously, thereby accessible oscillating axle swing changes and jackshaft, third axle relative position confirm pipe diameter, need not change the mould alright nimble adjustment pipe size, whole pipe stress is good simultaneously. The pipe manufacturing equipment disclosed by the invention is simple to operate and low in cost, can realize synchronous processing and forming of pipes with complex shapes, good surface quality and high geometric dimension precision, and meets high-quality and high-efficiency production.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the overall structure of a cold drawing machine according to an embodiment of the present invention;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of the guide clip in an open state;

FIG. 4 is a schematic view of the clamping state of the guide clamp;

FIG. 5 is a schematic diagram showing the structural distribution of three secondary cold drawing modules of the cold drawing machine;

FIG. 6 is a schematic structural diagram of a bending machine according to an embodiment of the present invention;

FIG. 7 is a left side view of the main frame of the pipe bending machine of FIG. 6;

FIG. 8 is a front view of the bender body of FIG. 6;

FIG. 9 is a schematic view of a feeding table;

wherein, 1-1 cold drawing; 1-2 cold drawing a die set; 1-3 pipes; 1-4, fixing a pulley I; 1-5 movable pulleys; 1-6 lead screws; 1-7, fixing a pulley II; 1-8 orbits; 1-9 a clamping device; 1-10 guide rails; 1-11 holding pliers; 1-12 scaffolds; 1-13 thin steel wire ropes; 1-14 thick steel wire ropes; 1-15 small winding wheels; 1-16 large gears; 1-17 large winding wheel; 1-18 pinion gears; 1-19 reducers; 1-20 motors; 1-21 electromagnets; 1-22 connecting plates; 1-23 clamp arms; 1-24 nylon protective sleeve; 1-25 fixed seats; 1-26 connecting plates; 1-27 sizing dies; 1-28 reducing die; 1-29 micro reducing sealing die; 1-31 lubricating an oil delivery pipe;

2-1, a host; 2-2 heat exchange tubes; 2-3, a material conveying table; 2-4 intermediate rolls; 2-5 third roller; 2-6 oscillating rolls; 2-7 primary support rollers; 2-9 hydraulic cylinders; 2-10 mounting seats; 2-11 speed reducers; 2-12 small chain wheels; 2-13 roller chains; 2-14 large chain wheels; 2-17 oscillating shaft; 2-18 swing arms; 2-19 intermediate shafts; 2-20 gear sets; 2-21 feeding rollers; 2-22 main frame; 2-23 auxiliary frames; 2-24 machine bases; 2-25 secondary support rollers; 2-26 horizontal sliding blocks; 2-27 vertical sliders; 2-28 vertical plates; 2-33 material receiving rollers; 2-34 conveying arms; 2-35 upright posts; 2-38 of base; 2-39 universal wheels.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide a pipe manufacturing device for a nickel-based high-temperature alloy seamless pipe, which aims to solve the problems in the prior art, and the pipe manufacturing device can realize the bending forming immediately after cold drawing by welding or fastening a cold drawing machine and a pipe bender in a shaft connection manner, thereby greatly improving the pipe processing and forming efficiency.

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description thereof.

As shown in fig. 1 to 9, the invention provides a pipe manufacturing device, in particular to a large-deformation pipe cold-drawing machine and a multi-pass bending roll pipe bender, and belongs to the technical field of machining. The pipe making equipment comprises a cold drawing machine and a pipe bending machine, the cold drawing machine and the pipe bending machine can be welded or coupled and fastened to realize immediate bending and forming after cold drawing is finished, and the pipe machining and forming efficiency is greatly improved.

The cold drawing machine part is a cold drawing machine capable of carrying out large-deformation one-step cold drawing forming on a high-quality overlong nuclear power heat exchange pipe.

The cold drawing machine comprises three secondary cold drawing dies 1-1 arranged at the front end of the cold drawing machine, a clamping device 1-9 capable of moving along a track 1-8 and a traction device connected with the clamping device 1-9, wherein the traction device comprises a pulley block, a motor 1-20 and a speed reducer 1-19, the pulley block comprises a fixed pulley 1-4, a movable pulley 1-5 and a fixed pulley two 1-7, one end of a thin steel wire rope 1-13 is connected with the front end of the clamping device 1-9 through the fixed pulley 1-4, the other end of the thin steel wire rope is connected with a small winding wheel 1-15 through the fixed pulley two 1-7, a screw rod 1-6 capable of adjusting the tension force of the thin steel wire rope 1-13 is arranged on the movable pulley 1-5, a thick steel wire rope 1-14 is connected with the clamping device 1-9 and the large winding wheel 1-17, one end of the small winding wheel 1-15 is provided with a large gear 1-16, one end of the large winding wheel 1-17 is provided with a small gear 1-18 meshed with a large gear 1-16 of the small winding wheel 1-15, and the large gear 1-16 is connected with a speed reducer 1-19;

the guide clamp arranged on the track 1-8 comprises a support 1-12 and a clamping forceps 1-11, the electromagnet 1-21, the lower end of the electromagnet 1-21 is provided with a connecting shaft, the clamping forceps 1-11 is composed of two intersected forceps arms 1-23, the forceps arms 1-23 fall down to be in a clamping state when the electromagnet 1-21 is powered off, when a separating force is applied to the two forceps arms 1-23, the two connecting plates 1-22 are mutually propped to form a self-locking mechanism, so that the clamping forceps 1-11 can clamp the pipe 1-3, the electromagnet 1-21 is attracted when the electromagnet 1-21 is powered on, the two forceps arms 1-23 of the clamping forceps 11 are in an open state, and in addition, nylon protective sleeves 1-24 are arranged in grooves at the lower ends of the forceps arms 1-23.

A fixed seat 1-25 is arranged in the cold-drawing die set 1-2, the fixed seat 1-25 is connected with a connecting plate 1-26 through a bolt, a sizing die 1-27 is arranged in a groove at one side of the connecting plate 1-26, a reducing die 1-28 is arranged in a middle groove, a micro-reducing sealing die 1-29 is arranged in a groove at the other side, the micro-reducing sealing die 1-29 enables the pipe 1-3 to generate weak deformation mainly to form a sealing cavity between the pipe and the reducing die 1-28, the diameter of the pipe 1-3 is close to the diameter of the finished pipe after the main deformation is carried out through the reducing dies 1-28, then the residual deformation is carried out on the sizing dies 1-28 to obtain the diameter which meets the requirement of the finished pipe, the forming efficiency of the pipe 1-3 is improved and the processing procedure is shortened through the step-by-step deformation of the three-pass die; the middle of the three secondary cold drawing dies penetrates through the pipe 1-3, the radial lubricating device consists of an oil conveying pipe and an oil nozzle positioned in a cavity between the micro-reducing sealing die and the reducing die, the cavity between the reducing die 1-28 and the micro-reducing sealing die 1-29 is connected with the oil conveying pipe 1-31 of the radial lubricating device, a high-pressure oil cavity is formed at the position, a lubricating oil film is further formed between the pipe 1-3 and the reducing die 1-27, the friction between the pipe 1-3 and the sizing die 1-27 is reduced, and the drawing force is reduced.

When the pipe blank is processed, the pipe 1-3 is firstly pushed to the cold drawing die set 1-2, so that the pipe 1-3 extends out to form a section as a pull head part, the clamping device 1-9 is started to clamp the extending part of the pipe 1-3, the starting motor 1-20 drives the big gear 1-16 and the small gear 1-18 to rotate, so that the small winding wheel 1-15 and the large winding wheel 1-17 rotate at a constant speed, the large winding wheel 1-17 tightens the thick steel wire rope 1-14 clamping device 1-9 to obtain a forward acting force, the small winding wheel 1-15 tightens the thin steel wire rope 1-13 clamping device 1-9 to obtain a backward acting force at the same time, because the backward acting force is smaller than the forward acting force, the clamping device 1-9 obtains forward traction force, and the pipe 1-3 is pulled out of the die cavity under the traction of the clamping device 1-9; at the moment, electromagnets 1-21 of the clamping device are in an electrified attraction state, two tong arms 1-23 of the clamping tongs 1-11 are in an open state under the action of the electromagnets 1-21 so that the clamping device 1-9 can pass through, each time the clamping device 1-9 passes through one clamping device, the proximity switch controls the electromagnet 31 to lose electricity so that the two tong arms 1-23 of the clamping tongs 1-11 fall down to clamp a pipe 1-3, and nylon protective sleeves 1-24 at the lower ends of the tong arms 1-23 support the pipe 1-3 to prevent the pipe 1-3 from sagging and deforming under the action of gravity; after the pipes 1-3 are completely pulled out, the clamping devices 1-9 are opened, the electromagnets 1-21 are controlled to open the clamping pincers 1-11 for unloading, the unloaded pipes 1-3 slide down from the openings of the supports 1-12, and then the pipes 1-3 are annealed; the large-deformation pipe cold-drawing machine adopts three secondary cold-drawing modules consisting of replaceable sizing dies 1-27, reducing dies 1-28 and micro reducing sealing dies 1-29, so that primary cold-drawing forming can be realized in a general nuclear power heat exchange pipe cold-drawing scene without secondary cold-drawing.

The large-deformation pipe cold-drawing machine has the advantages that the three-pass cold-drawing module is adopted to realize the one-pass cold-drawing high-quality molding of the ultra-long pipe, the deformation of the one-pass cold-drawing is increased through the three-pass cold-drawing die with different deformation, the precision and the quality of the large-deformation cold-drawing are ensured, and the production process is saved; the radial lubricating device forms a high-pressure cavity between the micro-reducing sealing dies 1-29 and the reducing dies 1-28, so that an oil film is formed between the pipes 1-3 and the reducing dies 1-28, the friction force between the pipes 1-3 and the reducing dies 1-28 and the subsequent sizing dies 1- +27 is reduced, the cold-drawing traction force is reduced, and the surface quality of the pipes 1-3 is improved; two groups of steel wire ropes with the same speed in the opposite directions are adopted to pull the clamping devices 1-9, so that the clamping devices 1-9 run stably, the rebound impact of the clamping devices when cold drawing stops is effectively avoided, the total weight of equipment is reduced compared with the traditional chain transmission, the operation is flexible, and the instantaneous speed fluctuation caused by starting is reduced; the guide clamp is arranged on the guide rail of the cold drawing machine, so that a supporting force is provided for the ultra-long pipe after cold drawing, and the pipe is prevented from being bent due to gravity. In a word, the large-deformation pipe cold-drawing machine saves time and labor, and has good pipe surface quality and high processing efficiency.

(2) The pipe bender part provides a multi-pass bending roller pipe bender with reasonable bending roller structure and high pipe bending precision

The pipe bender comprises a main machine 2-1 and a material conveying table 2-3. The two ends of a machine base 2-24 of the main machine 2-1 are provided with main machine frames 2-22, the main machine 2-1 is provided with three large devices of feeding, winding and supporting, wherein the winding device comprises a hydraulic cylinder 2-9, a swing roller 2-6, a middle roller 2-4 and a third roller 2-5, the hydraulic cylinder 2-9 is connected with a swing shaft 2-17 between the main machine frames 2-22 to drive the swing shaft 2-17 to swing, the swing shaft 2-17 is connected with a middle shaft 2-19 between the main machine frames 2-22 through a swing arm 2-18, the relative positions of the swing roller 2-6, the middle roller 2-4 and the third roller 2-5 determine the diameter of the heat exchange tube 2-2, and a primary supporting roller 2-7 is fixed at the left end of the middle part of the heat exchange tube 2-2 to maintain the stable stress during bending to improve the precision, meanwhile, the pipes are rapidly coiled, the feeding device comprises a speed reducer 2-11 and a feeding roller 2-21, the speed reducer 2-11 is arranged on one side of a hydraulic cylinder 2-9, a small chain wheel 2-12 is arranged on the speed reducer 2-11, the small chain wheel 2-12 is connected with a large chain wheel 2-14 on an auxiliary frame 2-23 through a roller chain 2-13, and the large chain wheel 2-14 is connected with a gear set 2-20; the supporting device comprises vertical plates 2-28, vertical sliding blocks 2-27 and secondary supporting rollers 2-25, the vertical plates 2-28 are installed on the main rack 2-22, the vertical sliding blocks 2-27 are arranged on one sides of the vertical plates 2-28, a hole groove is formed in the middle of each horizontal sliding block 2-26 and used for installing a connecting shaft, and the primary supporting rollers 2-25 are installed on the connecting shaft. The material conveying platform 2-3 comprises an upright post 2-35 and a material conveying arm 2-34, the material conveying arm 2-34 is provided with a material receiving roller 33, and the upright post 2-35 is arranged on a base 2-38 with a universal wheel 2-39.

When the device is actually used, a blank of a pipe 1-3 is transferred to a winding device by a feeding device, and is wound into a coil pipe 2-2 under the roll bending of a swing roller 2-6, an intermediate roller 2-4 and a third roller 2-5, meanwhile, a hydraulic cylinder 2-9 pushes the swing shaft 2-17 to move so as to drive the swing roller 2-6 of the swing shaft 2-17 to move, so that the swing roller 2-6 is changed, the relative positions of the intermediate roller 2-4 and the third roller 2-5 cause the diameter change of a heat exchange pipe 2-2 (the pipe 1-3 is called as the heat exchange pipe 2-2 in a pipe bender), and by utilizing a primary support roller 2-7 at the middle left end part of the heat exchange pipe 2-2 and a secondary support roller 2-25 in a support device, the precision reduction of the pipe caused by the diameter change of the heat exchange pipe 2-2 and the pitch change under the external force fluctuation is avoided, finally, a material conveying arm 2-34 of the material receiving device is inserted into the inner cylinder of the heat exchange tube 2-2 to receive the material, and finally the heat exchange tube 2-2 is discharged from the material conveying table 2-3.

The multi-pass bending roll pipe bender has the advantages that the diameter and the screw pitch of a pipe 1-3 can be changed without being influenced by stress fluctuation in the bending process through the multi-pass bending roll, so that the pipe bending precision is improved, the shaping pressure of the three forming rolls, namely the oscillating roll 2-6, the middle roll 2-4 and the third roll 2-5 is stable, the relative position between the oscillating roll 2-6 and the middle roll 2-4 and the relative position between the oscillating roll 2-5 and the third roll 2-5 can be changed through oscillation of the oscillating roll 2-6, so that the diameter of the pipe 1-3 can be determined, the size of the pipe can be flexibly adjusted without changing a mould, the whole pipe 1-3 is good in stress state, and the forming roll is a driven roll, so that the pipe surface and the roll surface slide relatively to ensure that the pipe wall is smooth and free of damage. In a word, the multi-pass bending roll pipe bender can realize the synchronous processing and forming of pipes with complex shapes, good surface quality and high geometric dimension precision, and meets the requirements of high-quality and high-efficiency production.

According to the pipe manufacturing equipment provided by the invention, the cold drawing machine and the pipe bender can be immediately bent and formed after cold drawing is finished through welding or shaft connection fastening, so that the pipe processing and forming efficiency is greatly improved. The processing equipment has the advantages of simple operation and low cost, can realize the synchronous processing and forming of the pipe with complex shape, good surface quality and high geometric dimension precision, and meets the requirements of high-quality and high-efficiency production.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the foregoing, the description is not to be taken in a limiting sense.

Claims

1. A pipe making apparatus, characterized by: comprises that

The cold drawing machine comprises a cold drawing die, a clamping device capable of moving along a rail and a traction device connected with the clamping device, the cold drawing die comprises a cold drawing module, a fixed seat is arranged in the cold drawing module, a connecting plate is arranged on the fixed seat, a micro-reducing sealing die, a reducing die and a sizing die are sequentially arranged on the connecting plate along the advancing direction of a pipe, and the pipe sequentially passes through the micro-reducing sealing die, the reducing die and the sizing die on the connecting plate to be subjected to cold drawing forming; the clamping device is used for clamping the pipe and driving the pipe to move; the traction device comprises a pulley block, a steel wire rope and a winding wheel, the pulley block is positioned at the feeding end of the cold drawing machine, the winding wheel is positioned at the blanking end of the cold drawing machine, one end of the steel wire rope is used for being directly connected with the clamping device or connected with the clamping device after penetrating through the pulley block, and the winding wheel driven by a motor is used for pulling the other end of the steel wire rope; and

the pipe bending machine is fixedly arranged at the blanking end of the cold drawing machine through welding or coupling and comprises a host and a material conveying table, wherein the host is provided with a feeding mechanism, a winding mechanism and a supporting mechanism, and the feeding mechanism is used for conveying the pipe subjected to cold drawing by the cold drawing machine to the winding mechanism; main frames are arranged at two ends of a base of the main frame, auxiliary frames are symmetrically arranged on the inner sides of the two main frames, the winding mechanism comprises a hydraulic cylinder, a swing shaft, a middle shaft and a third shaft, a telescopic rod of the hydraulic cylinder is connected with the swing shaft arranged between the two main frames, the swing shaft is connected with the middle shaft arranged between the two main frames through a swing arm, and the middle shaft is connected with the third shaft arranged between the two main frames through the swing arm; the supporting mechanism is used for maintaining the stable stress of the pipe during bending; the feeding platform is provided with a stand column, a feeding arm is arranged on the stand column, and the feeding arm is used for inserting into an inner cylinder of a bent pipe to receive materials.

2. The pipe making apparatus according to claim 1, wherein: and the middle cavity of the reducing die and the middle cavity of the micro reducing sealing die are both connected with a radial lubricating oil delivery pipe.

3. A pipe making apparatus as claimed in claim 1, wherein: the pulley block comprises a first fixed pulley, a second movable pulley and a second fixed pulley, the steel wire rope comprises a thin steel wire rope and a thick steel wire rope, the winding wheel comprises a large winding wheel and a small winding wheel, one end of the thin steel wire rope sequentially bypasses the first movable pulley and the first fixed pulley and then is connected with the clamping device, and the other end of the thin steel wire rope bypasses the second fixed pulley and then is connected with the small winding wheel; two ends of the thick steel wire rope are respectively connected with the clamping device and the large winding wheel; one end of a transmission shaft of the small winding wheel is provided with a large gear, one end of a transmission shaft of the large winding wheel is provided with a small gear meshed with the large gear, and the large gear is connected with the motor.

4. A pipe making apparatus according to claim 3, wherein: a screw rod capable of adjusting the tension of the thin steel wire rope is arranged on the movable pulley; the output end of the motor is provided with a speed reducer, and the large gear is in transmission connection with the speed reducer.

5. A pipe making apparatus as claimed in claim 1, wherein: the cold drawing machine further comprises a guide clamp, a plurality of guide clamps are arranged on the cold drawing machine at equal intervals along the advancing direction of the pipe, a guide rail is arranged at the top of a rack of the cold drawing machine and corresponds to the guide rail, each guide clamp comprises a support and a clamping clamp, the support can move along the guide rail, an electromagnet is mounted on the support, and a connecting shaft is arranged at the lower end of the electromagnet; the clamping pliers are composed of two intersected pliers arms, and the pipe is clamped between the two pliers arms; when the electromagnet is powered on, the two tong arms are in an open state.

6. A tube making apparatus as claimed in claim 5, wherein: and a nylon protective sleeve is arranged in the groove at the lower end of the clamp arm.

7. A pipe making apparatus as claimed in claim 1, wherein: the feeding mechanism comprises a speed reducer and a plurality of feeding rollers, a small chain wheel is arranged at the output end of the speed reducer and is in transmission connection with a large chain wheel on an auxiliary frame through a roller chain, the large chain wheel is in transmission connection with a gear set, gears in the gear set are in pairwise meshing transmission, the gears are respectively installed at one ends of the feeding rollers, and pipes are conveyed to the winding mechanism through the feeding rollers.

8. A pipe making apparatus as claimed in claim 1, wherein: the supporting mechanism comprises a primary supporting rod, a secondary supporting rod and vertical plates, the primary supporting rod is arranged on the outer side of the middle of a pipe on the main frame, the vertical plates are connected and arranged at the tops of the two main frames, vertical sliding blocks are arranged on the vertical plates, horizontal sliding blocks are arranged on one sides, back to the vertical plates, of the vertical sliding blocks, connecting shafts are arranged in slots in the middle of the horizontal sliding blocks, and the secondary supporting rollers are arranged on the connecting shafts.

9. A pipe making apparatus as claimed in claim 1, wherein: and the material conveying arm is provided with a material receiving roller.