CN111774457A

CN111774457A - Superfine long corrugated pipe forming device

Info

Publication number: CN111774457A
Application number: CN202010925805.2A
Authority: CN
Inventors: 刘�文; 黄浩然; 王春鸽; 张湛; 张池; 林立; 于艳东; 王沛超; 应祺辉; 王俊贤
Original assignee: Zhejiang University of Science and Technology ZUST
Current assignee: Ningbo University of Technology; Zhejiang University of Science and Technology ZUST
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2020-10-16
Anticipated expiration: 2040-09-07
Also published as: CN111774457B

Abstract

The invention discloses a superfine long corrugated pipe forming device which comprises a workbench, wherein a hydraulic driving mechanism, a lower pressing plate and a forming die are arranged on the workbench, die side pushing cylinders are arranged on two sides of the forming die, and the forming die comprises an upper die and a lower die; the upper die and the lower die are attached up and down, a corrugated pipe forming die channel with a plurality of forming areas is formed in the middle, two sides of the corrugated pipe forming die channel are respectively provided with a hydraulic side cylinder, the hydraulic side cylinders are connected with a plunger rod capable of being inserted into the corrugated pipe forming die channel, an axially telescopic liquid injection mandrel is arranged in the plunger rod in a penetrating mode, and one side of the outer end portion of the plunger rod is provided with a plug connected to the liquid injection mandrel. The invention has the advantages that the invention can manufacture the ultra-long stainless steel corrugated pipe under the requirement of a water distribution system in a large scale and high efficiency and can realize the customized processing of the stainless steel corrugated pipe.

Description

Superfine long corrugated pipe forming device

Technical Field

The invention relates to the technical field of corrugated pipe forming, in particular to a device for forming an ultra-long corrugated pipe.

Background

At present, most of water distribution systems in China are connected by plastic pipes or carbon steel pipes. Stainless steel corrugated tubing has been increasingly used in some developed countries and regions to replace the original plastic or carbon steel tubing connections in water distribution systems. Because the stainless steel corrugated pipe has the characteristics of corrugated vibration reduction and easy bending, the corrugated pipe is used for replacing a plastic pipe, a large number of joints can be reduced, the stainless steel corrugated pipe is more convenient and fast, and the drip risk is reduced. In addition, the stainless steel corrugated pipe has good resistance to external force, can effectively prevent the external force from being damaged, and has longer service life.

The stainless steel corrugated pipe in the water distribution system is different from a conventional corrugated pipe in that the stainless steel corrugated pipe in the water distribution system is a long and thin stainless steel corrugated pipe, the pipe body length generally exceeds 4000mm and is provided with a plurality of corrugated sections, the pipe outer diameter is about 20mm, namely the length-diameter ratio of the stainless steel corrugated pipe is more than 200, and at present, a standardized forming method and a standardized forming device for the stainless steel corrugated pipe with the size are not available. Because the characteristics of the stainless steel corrugated pipe in the water distribution system are thin, long and multiple corrugated sections, which are not available in the conventional corrugated pipe products, in the actual production, the positions and the number of the corrugated sections are also required to be flexibly changed to meet the requirements under different environments, the stainless steel corrugated pipe with the size has high processing difficulty, and if a hydraulic forming machine of the conventional corrugated pipe is adopted, even if the hydraulic forming machine is reduced in equal proportion, the hydraulic forming machine is also subjected to the obstacle on the length of the corrugated pipe, and an internal high-pressure hydraulic machine is even subjected to the severe problem of overhigh oil temperature of the hydraulic system, and cannot be used for manufacturing the stainless steel corrugated pipe required in the water distribution system. Accordingly, there is a need to develop a device for forming ultra-long stainless steel bellows required in water distribution systems to manufacture such bellows in large quantities and with high efficiency.

Disclosure of Invention

The invention aims to provide a device for forming an ultrafine long corrugated pipe. The method has the advantages that the ultra-long stainless steel corrugated pipe under the requirement of a water distribution system can be manufactured in a large scale and in a high efficiency manner, and the customized processing of the stainless steel corrugated pipe can be realized.

The technical scheme of the invention is as follows: a superfine long corrugated pipe forming device comprises a workbench, wherein a hydraulic driving mechanism, a lower pressing plate and a forming die are arranged on the workbench, die side pushing cylinders are arranged on two sides of the forming die, the forming die comprises an upper die guide rail positioned on the lower side of the lower pressing plate and a lower die guide rail positioned on the upper side of the workbench, the upper die guide rail and the lower die guide rail are respectively connected with an upper die and a lower die, and guide strips matched with the upper die guide rail and the lower die guide rail are arranged on the upper die and the lower die; the upper die and the lower die are attached up and down, a corrugated pipe forming die channel with a plurality of forming areas is formed in the middle, two sides of the corrugated pipe forming die channel are respectively provided with a hydraulic side cylinder, the hydraulic side cylinders are connected with a plunger rod capable of being inserted into the corrugated pipe forming die channel, an axially telescopic liquid injection mandrel is arranged in the plunger rod in a penetrating mode, and one side of the outer end portion of the plunger rod is provided with a plug connected to the liquid injection mandrel.

Compared with the prior art, the invention has the beneficial effects that: the method can be used for processing the slender stainless steel corrugated pipes in a large batch, and can efficiently process a plurality of sections of corrugations with a plurality of wave numbers on one corrugated pipe; a section of corrugation can be customized and processed on one corrugated pipe according to the corrugation position requirement of the stainless steel corrugated pipe. Furthermore, the forming die is internally provided with a plurality of ripple forming areas, a plurality of sections of ripples with a plurality of wave numbers can be processed on one corrugated pipe, the position of the corrugated pipe does not need to be frequently moved, only the position of the plunger rod needs to be changed, the raw material of the corrugated pipe is expanded one by one, then the wave extrusion of all expanded parts is completed through one-time extrusion, a plurality of sections of ripples with a plurality of wave numbers are extruded at one time, the working efficiency is high, and the forming die is suitable for mass production of the corrugated pipe. When only one section of corrugation is required to be processed on one corrugated pipe, the corrugation position can be customized by moving the plunger rod to select one of the corrugation forming areas so as to meet the special production requirement.

In the forming device for the superfine long corrugated pipe, the upper die and the lower die respectively comprise a plurality of die units, each die unit comprises a pair of die blocks with adjustable relative distance, a plurality of die sheets are arranged between the pair of die blocks and are elastically connected, and the adjacent die sheets can be mutually attached under the action of external force; the mould piece with all be equipped with the semicircle recess that supplies the bellows raw materials embedding on the mould piece, the semicircle recess both sides of mould piece all are equipped with the extrusion step, and two extrusion steps are pieced together into half outer ripple shape of bellows after the laminating of adjacent mould piece.

In the above device for forming ultra-fine long corrugated pipes, a plurality of sets of sleeved inner insertion pipes and outer sleeves are arranged between two opposite surfaces of the pair of mold blocks, a plurality of mold pieces are inserted into the inner insertion pipes and the outer sleeves at equal intervals, a plurality of springs for limiting the mold pieces are further sleeved on the inner insertion pipes and the outer sleeves, each spring passes through one mold piece, two ends of each spring abut against the two spaced mold pieces, and an annular groove is arranged at the mold piece abutted by the spring.

In the ultrafine long corrugated pipe forming device, the plug comprises a rubber block, a cavity matched with the shape of the outer end part of the plunger rod is formed in the inner side of the rubber block, a rubber sealing ring is arranged at the bottom of the cavity, a three-jaw expansion block is arranged on the inner side of the rubber sealing ring, and a pressing block fixed on a liquid injection mandrel is arranged on the outer side of the rubber block.

In the ultrafine long corrugated pipe forming device, an upper base plate is arranged between the upper die guide rail and the lower pressing plate, a lower base plate is arranged between the lower die guide rail and the workbench, side baffles are vertically arranged on the upper base plate and the lower base plate, and after the upper die and the lower die are vertically attached, the upper base plate, the lower base plate and the side baffles isolate the periphery of the upper die and the periphery of the lower die from an external space.

In the above mentioned ultrafine long corrugated pipe forming apparatus, five groups of inner tubes and outer tubes are sleeved between two opposite faces of the pair of mold blocks.

In the device for forming the superfine long corrugated pipe, the bottom of the hydraulic side cylinder is connected with a sliding block, the sliding block is arranged on a screw rod in a penetrating manner, and the end part of the screw rod is provided with a gear set and a motor.

In the forming device for the superfine long corrugated pipe, a plurality of groups of rollers and a plurality of material taking manipulators are respectively arranged on the workbenches on two sides of the forming die.

In the forming device for the superfine long-wave corrugated pipe, the hydraulic side cylinder is connected with a heat dissipation device, the heat dissipation device comprises a plurality of cooling oil tanks and an oil storage tank which are arranged in a straight line, the adjacent cooling oil tanks are communicated, the cooling oil tank at one end of the straight line is provided with a first oil inlet, the cooling oil tank at the other end of the straight line is communicated with the oil storage tank, and the oil storage tank is provided with a first oil outlet; a plurality of cooling oil tank and an oil storage tank middle part are equipped with the first wind channel that link up, and first wind channel department is equipped with first induced duct, first induced duct is connected with first draught fan.

In the forming device for the superfine long corrugated pipe, the hydraulic side cylinder is connected with a heat dissipation device, the heat dissipation device can also comprise a plurality of annularly arranged cooling oil pipes and an oil collection tank, the plurality of annularly arranged cooling oil pipes are paired in pairs, two cooling oil pipes which are paired in pairs are arranged in the oil collection tank, one end of one cooling oil pipe is provided with a second oil inlet, one end of the other cooling oil pipe is communicated with the oil collection tank, and the oil collection tank is provided with a second oil outlet; and the middle parts of the cooling oil pipes which are annularly arranged are provided with through second air channels, second air inducing pipes are arranged at the second air channels, and the second air inducing pipes are connected with a second draught fan.

Drawings

FIG. 1 is a schematic diagram of an automated molding line to which the present invention has been applied;

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

FIG. 3 is a schematic structural view of a molding die;

FIG. 4 is a schematic structural view of a mold cell;

FIG. 5 is a schematic diagram of an exploded structure of a mold cell;

FIG. 6 is a schematic view of the connection between the mold pieces;

FIG. 7 is an enlarged view of a portion of FIG. 3 at B;

FIG. 8 is a schematic view of a die plate configuration;

FIG. 9 is a schematic view of the backside structure of FIG. 8;

FIG. 10 is a schematic structural view of another die piece;

FIG. 11 is a schematic view of the backside structure of FIG. 10;

FIG. 12 is a schematic view of the outer structure of the stopper;

FIG. 13 is a sectional view of the inner structure of the stopper;

FIG. 14 is a schematic structural view of a three-jaw expansion block;

FIG. 15 is a schematic view of a heat dissipation device;

FIG. 16 is a schematic view of another heat sink;

FIG. 17 is an enlarged view of a portion of FIG. 2 at C;

FIG. 18 is an enlarged view of a portion of FIG. 1 at A;

FIG. 19 is a schematic structural view of the deadweight loading mechanism;

FIG. 20 is an enlarged fragmentary view of FIG. 19 at D;

FIG. 21 is an enlarged fragmentary view of FIG. 19 at E;

FIG. 22 is an enlarged fragmentary view of FIG. 19 at F;

fig. 23 is a schematic structural view of the deadweight blanking mechanism.

Reference numerals: 1-deadweight feed mechanism, 2-corrugation forming mechanism, 3-deadweight blanking mechanism, 21-workbench, 22-hydraulic drive mechanism, 23-lower pressing plate, 24-forming die, 25-die side pushing cylinder, 26-upper bottom plate, 27-lower bottom plate, 28-side baffle, 29-roller, 101-upper bin, 102-discharging mechanism, 103-feeding raceway component, 104-stop mechanism, 105-limit lug, 106-guide rail, 210-material taking manipulator, 240-die monomer, 241-upper die guide rail, 242-lower die guide rail, 243-upper die, 244-lower die, 245-guide bar, 246-corrugated pipe forming die way, 247-hydraulic side cylinder, 248-plunger rod, 249-plug, 301-a storage bin, 302-a blanking manipulator, 303-a blanking raceway assembly, 1021-a ratchet, 1022-a first cylinder, 1023-a rotating shaft, 1024-a shaft block, 1025-a fixing bracket, 1031-a loading raceway bracket, 1032-a loading guide roller, 1033-a loading slideway, 1034-a cushion pad, 1041-a base, 1042-a second cylinder, 1043-a loading baffle plate, 2401-a mold block, 2402-a mold sheet, 2403-a semicircular groove, 2404-an extrusion step, 2405-an inner insertion tube, 2406-an outer sleeve, 2407-a spring, 2408-a circular groove, 2411-a sliding block, 2412-a screw rod, 2413-a gear set, 2414-a motor, 2421-a cooling oil tank, 2422-an oil storage tank, 2423-a first air guiding pipe and 2424-a first draught fan, 2425-a first oil inlet, 2426-a first oil outlet, 2427-a first air duct, 2431-a cooling oil pipe, 2432-an oil collecting tank, 2433-a second oil inlet, 2434-a second oil outlet, 2435-a second air duct, 2436-a second induced draft pipe, 2437-a second induced draft fan, 2438-a supporting belt, 2481-an injection mandrel, 2491-a rubber block, 2492-a rubber sealing ring, 2493-a pressing block, 2494-a three-jaw expansion block, 3031-a blanking roller path support, 3032-a blanking guide roller, 3033-a blanking slideway and 3034-a blanking baffle.

Detailed Description

The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.

Example (b):

the invention can be applied to an automatic forming assembly line of a long and thin corrugated pipe, and the assembly line structure is shown in figures 1 to 23 and comprises a self-weight feeding mechanism 1, a corrugated forming mechanism 2 and a self-weight blanking mechanism 3; the ripple forming mechanism 2 herein is also the structure of the present invention, and includes a workbench 21, the workbench 21 is provided with a hydraulic driving mechanism 22, a lower pressing plate 23 and a forming mold 24, two sides of the forming mold 24 are provided with mold side pushing cylinders 25, the mold side pushing cylinders 25 apply axial pushing force to two ends of the forming mold 24 to complete the action of "wave extrusion", the forming mold 24 includes an upper mold guide rail 241 located at the lower side of the lower pressing plate 23 and a lower mold guide rail 242 located at the upper side of the workbench 21, the upper mold guide rail 241 and the lower mold guide rail 242 are respectively connected with an upper mold 243 and a lower mold 244, the upper mold 243 and the lower mold 244 are both provided with guide bars 245 matched with the upper mold guide rail 241 and the lower mold guide rail 242, and under the matching of the upper mold guide rail 241, the lower mold guide rail 242 and the guide bars 245, the forming mold 24 can be pushed axially to compress the wave extrusion; the upper die 243 and the lower die 244 form a corrugated pipe forming die passage 246 with a plurality of forming areas in the middle after being vertically attached, two sides of the corrugated pipe forming die passage 246 are respectively provided with a hydraulic side cylinder 247, the hydraulic side cylinders 247 are connected with a plunger rod 248 capable of being inserted into the corrugated pipe forming die passage 246, an axially telescopic liquid injection mandrel 2481 penetrates through the plunger rod 248, one side of the outer end of the plunger rod 248 is provided with a plug 249 connected to the liquid injection mandrel 2481, the hydraulic side cylinders 247 are matched with the plunger rod 248 and the plug 249 to inject liquid into the corrugated pipe raw material, and the liquid flows through the liquid injection mandrel 2481.

The hydraulic driving mechanism 22 in this embodiment drives the lower pressing plate 23 to make the upper mold 243 and the lower mold 244 fit with each other, and clamp and fix the corrugated pipe raw material between the upper mold 243 and the lower mold 244, wherein the hydraulic driving mechanism 22 is composed of a plurality of four-column hydraulic machines, the movable beams of adjacent hydraulic machines are connected through connecting blocks, and the movable beams and the connecting blocks form a complete lower pressing plate 23.

Further, the upper die 243 and the lower die 244 both comprise a plurality of die units 240, each die unit 240 comprises a pair of die blocks 2401 with adjustable relative distance, a plurality of die pieces 2402 are arranged between the pair of die blocks 2401, the plurality of die pieces 2402 are elastically connected, and the adjacent die pieces 2402 can be attached to each other under the action of external force; the mold block 2401 and the mold sheet 2402 are both provided with semicircular grooves 2403 for embedding corrugated pipe raw materials, two sides of each semicircular groove 2403 of each mold sheet 2402 are both provided with extrusion steps 2404, after the adjacent mold sheets 2402 are attached, the two extrusion steps 2404 are spliced into a half outer corrugation shape of the corrugated pipe, namely the upper mold 243 and the lower mold 244 form the whole outer corrugation shape after being pressed, the distance between the plurality of mold sheets 2402 is kept the same under the action of the elastic force of the springs 2407, at the moment, the whole forming mold 24 is located at an expanding working position, at the moment, the position to be expanded can be sealed by the end plug 249 at the end part of the plunger rod 248 through moving the plunger rod 248, high-pressure liquid injection is carried out in the selected closed area, and the expanding process is completed.

Further, a plurality of sets of inner and outer

sleeved tubes

2405 and 2406 are provided between two opposite surfaces of a pair of die pieces 2401, a plurality of die pieces 2402 are equally spaced and inserted on the inner and outer

sleeved tubes

2406 and 2405, a plurality of springs 2407 for limiting the die pieces 2402 are further sleeved on the inner and outer sleeved tubes 2406, each spring 2407 passes through one die piece 2402 and two ends of the spring 2407 abut on the two spaced die pieces 2402, an annular groove 2408 is provided at the die piece 2402 abutted by the spring 2407, the plurality of sets of inner and outer

sleeved tubes

2405 and 2406 ensure the stability of the mounting of the plurality of die pieces 2402 between the pair of die pieces 2401, and also provide more mounting positions for the mounting of the springs 2407, because each spring 2407 passes through only one die piece 2402 and two ends thereof abut on the two spaced die pieces 2402, the plurality of sets of inner and outer

sleeved tubes

2405 and 2406 enable the spring 2407 to simultaneously pass through another die piece 2402 as a supporting end of the other spring 2407, the springs 2407 can be complicatedly connected between the die pieces 2402, and the bulge wave and extrusion wave band of the finally formed forming die 24 can be uniformly closed when being extruded, and can be reset under the action of the springs 2407 after the upper die 243 is separated from the lower die 244.

For this purpose, the die 2402 has two structural forms, fig. 8 and 9 show the die 2402 with one structural form, and the two faces of the die 2402 have two annular grooves 2408, and the hole at the center of the die has no annular groove 2408; fig. 10 and 11 show another embodiment of a die 2402, wherein the die 2402 has three circular grooves 2408 on both sides, and the circular groove 2408 is provided at the center of the hole.

Further, the plug 249 comprises a rubber block 2491, a cavity matched with the shape of the outer end of the plunger rod 248 is formed in the inner side of the rubber block 2491, a rubber sealing ring 2492 is formed in the bottom of the cavity, a three-jaw expansion block 2494 is formed in the inner side of the rubber sealing ring 2492, a pressing block 2493 fixed on the liquid injection mandrel 2481 is arranged on the outer side of the rubber block 2491, the liquid injection mandrel 2481 can axially extend and retract, after the plunger rod 248 moves to an expansion position as required, the pressing block 2493 is driven to press the rubber block 2491 through contraction of the liquid injection mandrel 2481, the rubber block 2491 is contacted with a protrusion at the end of the plunger rod 248 to expand, the three-jaw expansion block 2494 can amplify the pressing of the rubber block 2491 at the protrusion at the end of the plunger rod 248, the rubber block 2491 expands more obviously, sealing between the rubber block 2491 and a tube blank inner wall is achieved, the sealing effect is better, and the inner high.

Further, an upper base plate 26 is arranged between the upper die guide rail 241 and the lower press plate 23, a lower base plate 27 is arranged between the lower die guide rail 242 and the workbench 21, side baffles 28 are vertically arranged on the upper base plate 26 and the lower base plate 27, after the upper die 243 and the lower die 244 are vertically attached, the peripheries of the upper die 243 and the lower die 244 are isolated from the external space by the upper base plate 26, the lower base plate 27 and the side baffles 28, and the arrangement of the upper base plate 26, the lower base plate 27 and the side baffles 28 ensures that the safety performance of the corrugated pipe forming machine is better when the corrugated pipe forming machine works, because the whole forming die 24 is surrounded by a semi-closed type outer cover, the corrugated pipe forming machine can play a good role in isolation, and even if the corrugated pipe bursts, the corrugated pipe forming machine can still ensure the safety of workers nearby the corrugated pipe.

Further, five groups of inner tubes 2405 and outer tubes 2406 are sleeved between two opposite surfaces of the pair of die pieces 2401, the five groups of inner tubes 2405 and outer tubes 2406 are arranged at five positions of four corners and the center of a rectangle, the stability of installation of the plurality of die pieces 2402 between the pair of die pieces 2401 can be ensured, more installation positions are provided for the installation of the springs 2407, because each spring 2407 only penetrates one die piece 2402 and two ends of each spring are abutted against two spaced die pieces 2402, the five groups of sleeved inner tubes 2405 and outer tubes 2406 enable the die piece 2402 penetrated by one spring 2407 to simultaneously serve as supporting ends of the other four springs 2407, two springs 2407 are respectively supported on two surfaces of the die piece 2402, and the springs 2407 can be connected between the die pieces 2402 in a staggered and complicated mode.

Furthermore, the bottom of the hydraulic side cylinder 247 is connected with a sliding block 2411, the sliding block 2411 is arranged on a screw rod 2412 in a penetrating way, the end part of the screw rod 2412 is provided with a gear set 2413 and a motor 2414, the motor 2414 and the gear set 2413 drive the movement of the hydraulic side cylinder 247, namely drive the movement of the plunger rod 248 on the hydraulic side cylinder 247, so that the plunger rod 248 can be moved to a required position.

Furthermore, a plurality of sets of rollers 29 and a plurality of material taking manipulators 210 are respectively arranged on the workbench 21 on both sides of the forming mold 24, the plurality of sets of rollers 29 on both sides are respectively used as the end point of corrugated pipe feeding and the starting point of blanking, and before forming, the corrugated pipe raw material after feeding is clamped onto the lower mold 244 by the material taking manipulator 210 on one side from the plurality of sets of rollers 29 on the same side; after the forming operation, the formed corrugated tube is clamped to the sets of rollers 29 on the same side from the lower mold 244 by the material taking manipulator 210 on the other side.

Preferably, the hydraulic side cylinder 247 is connected with a heat dissipation device, as shown in fig. 16, the heat dissipation device includes a plurality of cooling oil pipes 2431 arranged annularly and an oil collection tank 2432, the plurality of cooling oil pipes 2431 arranged annularly are paired pairwise, two cooling oil pipes 2431 paired pairwise, one end of one cooling oil pipe 2431 is provided with a second oil inlet 2433, one end of the other cooling oil pipe 2431 is communicated with the oil collection tank 2432, and the oil collection tank 2432 is provided with a second oil outlet 2434; the middle parts of the cooling oil pipes 2431 in a plurality of annular arrangements are provided with a second air duct 2435 which is through, the second air duct 2435 is provided with a second induced draft pipe 2436, the second induced draft pipe 2436 is connected with a second induced draft fan 2437, and all the cooling oil pipes 2431 are supported by an annular supporting belt 2438, so that the annular array formed by the annular cooling oil pipes 2431 is more stable.

When the corrugated pipe is formed at the internal high pressure, particularly when the ultrafine long corrugated pipe is formed in a large batch, the internal high-pressure hydraulic machine often faces the severe problem that the hydraulic oil temperature of a hydraulic system is too high, the viscosity of hydraulic oil is reduced due to the too high hydraulic oil temperature, leakage is easy to cause, and the efficiency is reduced; the strength of a lubricating oil film is reduced, and the abrasion of machinery is accelerated; generating carbide and sludge; oil oxidation is accelerated, and oil quality is deteriorated; the problems of premature aging of oil seals and high-pressure rubber pipes and the like are also the reasons that the conventional hydraulic forming machine cannot be used for manufacturing the superfine long corrugated pipes limited by the invention, the heat dissipation problem is well solved by the heat dissipation device of the hydraulic side cylinder 247, high-temperature hydraulic oil enters from the second oil inlet 2433, returns twice through the cooling oil pipe 2431 and is finally recycled into the oil collection tank 2432, the quick self-heat dissipation of the engine oil is realized, and the natural wind efficiency is improved.

Alternatively, the heat dissipation device may also adopt a structure as shown in fig. 15, including a plurality of cooling oil tanks 2421 and an oil storage tank 2422 which are arranged in a straight line, adjacent cooling oil tanks 2421 are communicated, the cooling oil tank 2421 at one end of the straight line is provided with a first oil inlet 2425, the cooling oil tank 2421 at the other end of the straight line is communicated with the oil storage tank 2422, and the oil storage tank 2422 is provided with a first oil outlet 2426; the middle parts of the plurality of cooling oil tanks 2421 and the oil storage tank 2422 are provided with a first through air duct 2427, the first air duct 2427 is provided with a first air guiding pipe 2423, the first air guiding pipe 2423 is connected with a first induced draft fan 2424, and the heat dissipation device with the structure can well solve the heat dissipation problem of the hydraulic side cylinder 247.

Further, dead weight feed mechanism 1 includes feed bin 101, discharge mechanism 102, material loading raceway subassembly 103 includes material loading raceway support 1031, be equipped with a plurality of material loading deflector roll 1032 on the material loading raceway support 1031, the middle part circumference of a plurality of material loading deflector roll 1032 is equipped with the indent, can fix a position the position of bellows raw materials on material loading deflector roll 1032, and a plurality of material loading deflector roll 1032 arranges from high to low that each indent cooperation of material loading deflector roll 1032 forms the material loading slide 1033 of downward sloping, one side of material loading slide 1033 is equipped with blotter 1034, plays the cushioning effect to the bellows raw materials that roll off, assists its landing to material loading slide 1033, and the end of material loading slide 1033 is equipped with stock stop 104.

Further, the discharging mechanism 102 is disposed at a material outlet of the upper bin 101, a limiting protrusion 105 is disposed at the material outlet of the upper bin 101 to limit the number of outlets of the corrugated pipe raw material, and a guide rail 106 is disposed between the discharging mechanism 102 and the feeding raceway assembly 103.

Further, the discharging mechanism 102 includes a ratchet wheel 1021, a first cylinder 1022, a rotating shaft 1023, a shaft block 1024, and a fixing support 1025, wherein the first cylinder 1022 drives the rotating shaft 1023 to rotate via the shaft block 1024 mounted on the rotating shaft 1023, the ratchet wheel 1021 is connected with the rotating shaft 1023 via a bearing, and the ratchet wheel 1021 can pull the bellows raw material limited at the material outlet of the upper bin 101 along with the rotation of the rotating shaft 1023, fall onto the guide rail 106, and finally fall onto the feeding raceway assembly 103.

Further, the stock stop 104 includes a base 1041, a second cylinder 1042 is arranged on the base 1041, a feeding baffle 1043 is connected to the top of the second cylinder 1042, and the corrugated pipe raw material is limited to enter a feeding position by the upward feeding baffle 1043.

The ratchet wheel 1021 is driven by controlling the first cylinder 1022, so that a tube blank in the feeding bin 101 enters the feeding raceway assembly 103 through the guide rail 106 by virtue of self gravity, the tube blank is automatically positioned and centered through the feeding guide roller 1032 which is provided with an inward concave part in the circumferential direction, the tube blank directionally moves to a plurality of groups of rollers 29 on one side of the ripple forming mechanism 2 through the feeding slide 1033 with a certain inclination, and the feeding quantity is controlled through the lifting of the material blocking mechanism 104.

Further, dead weight unloading mechanism 3 includes storage silo 301, unloading manipulator 302, unloading raceway subassembly 303 includes unloading raceway support 3031, be equipped with a plurality of unloading deflector roll 3032 on the unloading raceway support 3031, the middle part circumference of a plurality of unloading deflector roll 3032 is equipped with the indent, and a plurality of unloading deflector roll 3032 arranges from high to low that each indent cooperation that makes unloading deflector roll 3032 forms the unloading slide 3033 of downward sloping, the end of unloading slide 3033 is equipped with unloading baffle 3034.

The molded corrugated pipe is clamped to a plurality of groups of rollers 29 on the same side by controlling the material taking manipulator 210, the corrugated pipe reaches a designated position through the blanking raceway assembly 303, the corrugated pipe is prevented from sliding out through the blanking baffle 3034 at the tail end of the blanking slideway 3033, and the corrugated pipe is clamped into the storage bin 301 by the blanking manipulator 302.

Further, a guide plate is arranged at the bin opening of the storage bin 301, and plays a role in guiding the corrugated pipe put down by the feeding manipulator 302.

The blanking manipulator 302 and the material taking manipulator 210 are both conventional manipulators, and comprise a supporting seat, a sliding table cylinder, a clamping cylinder, a guide slideway and other parts.

In the whole stroke of bellows, all with the help of self gravity motion at material loading slide 1033, a plurality of groups of running rollers 29 and the unloading slide 3033 of ripple forming mechanism 2 both sides department pipe billet, the pipe billet moves to on a plurality of groups of running rollers 29 of ripple forming mechanism 2 one side from material loading slide 1033 along material loading deflector roll 1032 with the help of self gravity, wherein, the perpendicular distance H1 between every running roller 29 of a plurality of groups of running rollers 29 of ripple forming mechanism 2 one side is equal and is:

H1=a1*L1/n1

h1-vertical distance between each roller of a plurality of groups of rollers at one side of the corrugation forming mechanism;

l1-horizontal distance between each of the plurality of sets of rollers on one side of the corrugating mechanism;

a 1-deflection of the tube blank (influenced by the deformation properties of the material);

n 1-number of loading guide rollers.

The formed corrugated pipe moves to a blanking slideway 3033 along a plurality of groups of rollers 29 on the other side of the corrugated forming mechanism 2 by virtue of self gravity, wherein the vertical distances H2 between each blanking guide roller 3032 of the blanking slideway 3033 are equal and are as follows:

H2=a2*L2/n2

h2-vertical distance between each blanking guide roller;

l2-horizontal distance between the blanking guide rollers;

a 2-deflection of the bellows (influenced by the material deformation properties);

n 2-number of sets of rollers on the other side of the corrugating mechanism.

The conveying of the tube blank and the corrugated tube is completed by means of self gravity, so that energy sources can be saved, the structure of the device is simplified, the operation is simple and convenient, and the cost is low. The accurate design of H1 and H2 can prevent effectively that pipe blank and bellows warp and lead to striking with corrugated forming mechanism 2 opposite side running roller 29, unloading deflector roll 3032, hinder the transport, damage the pipe fitting.

The working principle of the assembly line is as follows:

the stainless steel discontinuous corrugated pipe is manufactured by applying the forming process and the forming assembly line thereof, and is made of SUS304, the length of the pipe blank is 4000mm, the outer diameter of the pipe blank is 20mm, the length-diameter ratio of the pipe blank is 200, the wall thickness of the pipe blank is 2mm, the length of a single corrugated section of the corrugated pipe is 120mm, the wave number of the single corrugated section is 15, the number of the corrugated sections is 6, and the distance between the corrugated sections is 475 mm.

Feeding: the ratchet wheel 1021 is rotated to a certain position in advance to limit the falling of the corrugated tube raw material, namely, the tube blank, the first cylinder 1022 is given a signal to enable the first cylinder 1022 to move upwards to enable the rotating shaft 1023 to rotate and then descend, the ratchet wheel 1021 rotates by a certain angle to drive the corrugated tube raw material to fall to the guide rail 106, the corrugated tube raw material enters the feeding raceway assembly 103 from the guide rail 106, falls onto the feeding slide 1033 through the limiting buffering of the buffering pad 1034, moves to a plurality of groups of rollers 29 on one side of the corrugation forming mechanism 2 from the feeding slide 1033 along the feeding guide roller 1032 by virtue of self gravity, and is taken out by the material taking manipulator 210 and is placed into the semicircular groove 2403 of the lower die 244 of the forming die 24.

Molding: the hydraulic driving mechanism 22 drives the lower pressing plate 23 to descend, so that the upper die 243 is attached to the lower die 244, the lower die 244 is pressed tightly, die assembly is completed, and the corrugated pipe raw material is clamped between the upper die 243 and the lower die 244; the motor 2414 and the gear set 2413 on two sides drive the hydraulic side cylinders 247 on two sides to move, so that the plunger rod 248 on the hydraulic side cylinders 247 moves to an expansion part, after the plunger rod 248 moves to the expansion part as required, the liquid injection mandrel 2481 contracts to drive the pressing block 2493 to extrude the rubber block 2491, the rubber block 2491 is contacted with the protruding part at the end part of the plunger rod 248 to expand and thicken, sealing is realized between the rubber block 2491 and the inner wall of the raw material of the corrugated pipe, and a closed area formed in the raw material of the corrugated pipe corresponds to the position of a certain corrugated forming area on the forming; the hydraulic side cylinder 247 is matched with the plunger rod 248 and the plug 249 to inject liquid into the corrugated pipe raw material, the liquid flows to a closed area formed in the corrugated pipe raw material from the liquid injection mandrel 2481 to finish high-pressure liquid injection, at the moment, the part, corresponding to the corrugated forming area of the forming die 24, in the corrugated pipe raw material is gradually expanded to form flat corrugations, one expansion is finished, then the liquid is removed, the positions of the plunger rods 248 with the plugs 249 in the corrugated pipe raw material are changed, and the expansion process is repeated to finish the expansion of the other 5 positions; removing the liquid, reducing the pressure of the upper die 243 on the lower die 244, so that the forming die 24 can move under the coordination of the upper die guide rail 241, the lower die guide rail 242 and the guide bar 245, specifically, the die side pushing cylinder 25 applies axial pushing force to two ends of the forming die 24, the die sheets 2402 on the forming die 24 are gradually closed, the bulging part of the corrugated pipe is extruded, the wave extrusion process of all bulging parts is completed through one-time extrusion, so that a plurality of sections of waves with a plurality of wave numbers are formed on the corrugated pipe raw material, then the lower pressing plate 23 moves upwards, the upper die 243 is separated from the lower die 244, the formed corrugated pipe is clamped to a plurality of groups of rollers 29 on the same side by the material taking manipulator 210, and the die sheets 2402 are restored to the initial position under the action of the spring 2407 to wait for processing of the next corrugated pipe raw material.

Blanking: the formed corrugated pipe moves to the discharging slideway 3033 along a plurality of groups of rollers 29 of the corrugated forming mechanism 2 by means of self gravity, the corrugated pipe strikes a discharging baffle 3034 at the tail end of the discharging slideway 3033 to reach a discharging position, the discharging manipulator 302 clamps the corrugated pipe at the discharging position and places the corrugated pipe at the bin mouth of the storage bin 301, and the corrugated pipe slides into the storage bin 301 along the guide plate.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned examples, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. The utility model provides an ultra-fine long bellows forming device, includes workstation (21), be equipped with hydraulic drive mechanism (22), holding down plate (23) and forming die (24) on workstation (21), its characterized in that: mold side push cylinders (25) are arranged on two sides of the forming mold (24), the forming mold (24) comprises an upper mold guide rail (241) positioned on the lower side of the lower pressing plate (23) and a lower mold guide rail (242) positioned on the upper side of the workbench (21), the upper mold guide rail (241) and the lower mold guide rail (242) are respectively connected with an upper mold (243) and a lower mold (244), and guide strips (245) matched with the upper mold guide rail (241) and the lower mold guide rail (242) are arranged on the upper mold (243) and the lower mold (244); the corrugated pipe forming die comprises an upper die (243) and a lower die (244), wherein a corrugated pipe forming die passage (246) with a plurality of forming areas is formed in the middle of the upper die and the lower die after being vertically attached, two sides of the corrugated pipe forming die passage (246) are respectively provided with a hydraulic side cylinder (247), the hydraulic side cylinders (247) are connected with a plunger rod (248) capable of being inserted into the corrugated pipe forming die passage (246), an axially telescopic liquid injection mandrel (2481) penetrates through the interior of the plunger rod (248), and one side of the outer end portion of the plunger rod (248) is provided with a plug (249) connected to the liquid injection mandrel (2481).

2. The forming device of the ultrafine long corrugated pipe as claimed in claim 1, wherein: the upper die (243) and the lower die (244) both comprise a plurality of die single bodies (240), each die single body (240) comprises a pair of die blocks (2401) with adjustable relative distance, a plurality of die sheets (2402) are arranged between the pair of die blocks (2401), the plurality of die sheets (2402) are elastically connected, and the adjacent die sheets (2402) can be mutually attached under the action of external force; the corrugated pipe is characterized in that the die block (2401) and the die piece (2402) are respectively provided with a semicircular groove (2403) for embedding corrugated pipe raw materials, the two sides of the semicircular groove (2403) of the die piece (2402) are respectively provided with an extrusion step (2404), and the two extrusion steps (2404) are spliced into a half outer corrugated shape of the corrugated pipe after the adjacent die pieces (2402) are attached.

3. The forming device of the ultrafine long corrugated pipe as claimed in claim 2, wherein: a plurality of groups of sleeved inner inserting tubes (2405) and outer sleeving tubes (2406) are arranged between two opposite surfaces of the pair of die blocks (2401), a plurality of die sheets (2402) are inserted into the inner inserting tubes (2405) and the outer sleeving tubes (2406) at equal intervals, a plurality of springs (2407) for limiting the die sheets (2402) are sleeved on the inner inserting tubes (2405) and the outer sleeving tubes (2406), each spring (2407) penetrates through one die sheet (2402), two ends of each spring (2407) abut against the two spaced die sheets (2402), and annular grooves (2408) are formed in the die sheets (2402) abutted by the springs (2407).

4. The forming device of the ultrafine long corrugated pipe as claimed in claim 3, wherein: the plug (249) comprises a rubber block (2491), a cavity matched with the shape of the outer end of the plunger rod (248) is formed in the inner side of the rubber block (2491), a rubber sealing ring (2492) is arranged at the bottom of the cavity, a three-jaw expansion block (2494) is arranged on the inner side of the rubber sealing ring (2492), and a pressing block (2493) fixed on the liquid injection mandrel (2481) is arranged on the outer side of the rubber block (2491).

5. The forming device of the ultra-fine long corrugated pipe as claimed in claim 4, wherein: an upper base plate (26) is arranged between the upper die guide rail (241) and the lower pressing plate (23), a lower base plate (27) is arranged between the lower die guide rail (242) and the workbench (21), side baffles (28) are vertically arranged on the upper base plate (26) and the lower base plate (27), and after the upper die (243) and the lower die (244) are vertically attached, the periphery of the upper die (243) and the periphery of the lower die (244) are isolated from the external space by the upper base plate (26), the lower base plate (27) and the side baffles (28).

6. The forming device of the ultra-fine long corrugated pipe as claimed in claim 4, wherein: five groups of inner inserting tubes (2405) and outer sleeving tubes (2406) are sleeved between two opposite surfaces of the pair of die blocks (2401).

7. The forming device of the ultra-fine long corrugated pipe as claimed in claim 4, wherein: the bottom of the hydraulic side cylinder (247) is connected with a sliding block (2411), the sliding block (2411) is arranged on a screw rod (2412) in a penetrating mode, and a gear set (2413) and a motor (2414) are arranged at the end portion of the screw rod (2412).

8. The forming device of the ultra-fine long corrugated pipe as claimed in claim 4, wherein: the forming die is characterized in that a plurality of groups of rollers (29) and a plurality of material taking manipulators (210) are respectively arranged on the workbench (21) on two sides of the forming die (24).

9. The forming device of the ultra-fine long corrugated pipe as claimed in claim 4, wherein: the hydraulic side cylinder (247) is connected with a heat dissipation device, the heat dissipation device comprises a plurality of cooling oil tanks (2421) and an oil storage tank (2422), the cooling oil tanks (2421) are arranged in a straight line, adjacent cooling oil tanks (2421) are communicated, a first oil inlet (2425) is formed in the cooling oil tank (2421) at one end of the straight line, the cooling oil tank (2421) at the other end of the straight line is communicated with the oil storage tank (2422), and a first oil outlet (2426) is formed in the oil storage tank (2422); a plurality of cooling oil tanks (2421) and an oil storage tank (2422) middle part is equipped with first wind channel (2427) that link up, and first wind channel (2427) department is equipped with first induced duct (2423), first induced duct (2423) are connected with first draught fan (2424).

10. The forming device of the ultra-fine long corrugated pipe as claimed in claim 4, wherein: the hydraulic side cylinder (247) is connected with a heat dissipation device, the heat dissipation device comprises a plurality of annularly arranged cooling oil pipes (2431) and an oil collection tank (2432), the plurality of annularly arranged cooling oil pipes (2431) are paired pairwise, two pairwise paired cooling oil pipes (2431), one end of one cooling oil pipe (2431) is provided with a second oil inlet (2433), one end of the other cooling oil pipe (2431) is communicated with the oil collection tank (2432), and the oil collection tank (2432) is provided with a second oil outlet (2434); the middle parts of the cooling oil pipes (2431) which are annularly arranged are provided with a second through air duct (2435), a second air inducing pipe (2436) is arranged at the second air duct (2435), and the second air inducing pipe (2436) is connected with a second induced draft fan (2437).