CN108655250A - A kind of pipe fitting inflatable thermoforming process - Google Patents

A kind of pipe fitting inflatable thermoforming process Download PDF

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Publication number
CN108655250A
CN108655250A CN201810463709.3A CN201810463709A CN108655250A CN 108655250 A CN108655250 A CN 108655250A CN 201810463709 A CN201810463709 A CN 201810463709A CN 108655250 A CN108655250 A CN 108655250A
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CN
China
Prior art keywords
pipe fitting
forming module
venthole
inflatable
gas
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Granted
Application number
CN201810463709.3A
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Chinese (zh)
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CN108655250B (en
Inventor
周焱春
孙瑜晨
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Qing Darcy (Ningbo) steel structure manufacturing Co., Ltd.
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周焱春
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Priority to CN201810463709.3A priority Critical patent/CN108655250B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033Deforming tubular bodies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033Deforming tubular bodies
    • B21D26/045Closing or sealing means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033Deforming tubular bodies
    • B21D26/047Mould construction
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D26/00Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/02Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/033Deforming tubular bodies
    • B21D26/049Deforming bodies having a closed end
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/16Heating or cooling

Abstract

The invention belongs to formation of tubes technical fields, specifically a kind of pipe fitting inflatable thermoforming process, the inflatable thermoforming process uses such as lower pipe fitting inflatable thermoforming production equipment, the pipe fitting inflatable thermoforming production equipment includes fixing body, upper die and lower die, forming module, end socket, gas transfer pipeline and air pipeline, upper die and lower die can do die open/close movement in arrangement, upper mold up and down with respect to lower die;For forming module between upper die and lower die, forming module is used for formation of tubes, and end socket is enclosed airtight chamber with forming module, upper die and lower die;Gas transfer pipeline is connected to forming module, and gas transfer pipeline makes pipe fitting inflatable be molded for being passed through high pressure gas into airtight chamber;Air pipeline is connected to forming module, and air pipeline is used to cool down to airtight chamber;The present invention can make pipe fitting by being continuously molded three times, and shaping speed is fast, shaping efficiency is high, molding resilience amount is small, forming accuracy is high.

Description

A kind of pipe fitting inflatable thermoforming process
Technical field
The invention belongs to formation of tubes technical field, specifically a kind of pipe fitting inflatable thermoforming process.
Background technology
Pipe fitting is parts the effects that playing connection, control, deflecting, shunting, sealing, support in pipe-line system;Various shapes Shape and the metallic conductor pipe fitting of size have widely in fields such as aerospace, automobile, petrochemical industry and electric system Application.And these metallic conductor pipe fittings all have complicated, irregular surface shape many times, Same Part is not There is different cross-sectional shapes with position, and to be difficult the pipe fitting for obtaining these complicated shapes by being directly machined, And machining accuracy and quality also are difficult to meet the requirement of application.In order to by the pipe of simple shape be made it is final meet precision and The complex pipes of quality requirement using to high pressure gas is passed through inside pipe, keeps the mode of sealing, make original pipe herein Base occur under the action of gas pressure bulging and the pipe outside mould that gradually reclines method mold required for shape pipe Part.
Also occur the technical solution of some pipe fitting inflatable thermoformings in the prior art, such as application No. is A Chinese patent of CN201010228426 discloses a kind of molding of inflatable and thermoforming composite forming method and its use Device, including " woollen prebuckling is welded into cone barrel;The lower end of air bag is placed in air bag lower bayonet slot;Woollen set is put In the outer surface of hot forming tool;Mold upper cover is placed on to the top of inflatable molding die;Tool part is lifted into inflatable On forming furnace workbench, and air bag and external aeration pipeline are connected, close fire door, starts heating device;Carry out thermoforming;When up to When to inflatable forming temperature, inflatable molding is carried out according to inflatable moulding process;After tool part cooling, tool part is taken out; Part is dismantled according to the reverse order of assembly tooling part." but the technical solution needed before being molded to tool part pre-bending and Welding, while only by inflatable one-pass molding, process is various, molding is slow, and it is low to go out part rate.
In consideration of it, a kind of pipe fitting inflatable thermoforming process of the present invention, is not necessarily to before molding by woollen pre-bending and welding, Can straight forming, by fuel oil burning thermally expand first thermoforming, the mechanical presses by moulded head to pipe fitting are carried out to pipe fitting It is molded and the continuous of pipe fitting billow forming is molded three times by being passed through high pressure gas, process is few, and shaping speed is fast, goes out part rate It is high.
Invention content
In order to make up for the deficiencies of the prior art, the present invention proposes a kind of pipe fitting inflatable thermoforming process, and the present invention is main For to pipe fitting inflatable thermoforming.The present invention improves pipe fitting inflatable thermoforming side by pipe fitting inflatable thermoforming production equipment Method so that pipe fitting is not necessarily to pre-bending and welding before the forming, and can directly feed intake molding;Meanwhile the present invention is swollen by the fuel oil combustion heat It is swollen that first thermoforming is carried out to pipe fitting, the mechanical presses of pipe fitting again are molded and finally by high pressure gas pair by moulded head The continuous of pipe fitting billow forming is molded three times, and shaping speed is fast, and shaping efficiency is high, and molding resilience amount is small, and formed precision is high.
The technical solution adopted by the present invention to solve the technical problems is:A kind of pipe fitting inflatable thermoforming process, the inflatable Thermoforming process is used such as lower pipe fitting inflatable thermoforming production equipment, the pipe fitting inflatable thermoforming production equipment include fixing body, Upper die and lower die, forming module, end socket, gas transfer pipeline and air pipeline are provided with slideway one, slideway in the fixing body One is slidably matched with forming module, pushes forming module to be slided in slideway one by hydraulic press, and slideway one is matched with end socket sliding It closes, end socket sliding in slideway one is pushed by hydraulic press;For the upper die and lower die in arrangement up and down, upper mold can be with respect to lower die Die open/close movement is done, upper mold is adapted with lower die;For the forming module between upper die and lower die, forming module is used for pipe fitting Molding, and igniter is provided on forming module, igniter is for lighting a fire;The end socket is between upper die and lower die, end socket It is enclosed airtight chamber with forming module, upper die and lower die;The gas transfer pipeline is connected to forming module, gas conveying Pipeline makes pipe fitting inflatable be molded for being passed through high pressure gas into airtight chamber;The air pipeline is connected to forming module, is led to Air pipe line is for driving forming module to rotate and for cooling down to airtight chamber;High temperature of the present invention is that can make tube material The temperature or higher temperature of austenitizing;The high pressure of the gas refers to the pressure that tube material can be made to be deformed or more high pressure Power;
The inflatable thermoforming process includes the following steps:
Step 1:It takes and needs molding pipe fitting, and pipe fitting is put into lower die upper end;
Step 2:After step 1 pipe fitting places, upper mold downlink is controlled, upper mold is molded with lower die by the upper and lower of pipe fitting Fang Dingwei, control end socket are moved to pipe fitting direction, and with end socket by a side positioning of pipe fitting, control forming module is moved to pipe fitting direction Dynamic, with forming module to another side positioning of pipe fitting, when forming module is by spray bar lower end, spray bar is sprayed on forming module Apply fuel oil;
Step 3:After step 2 is completed to the positioning of pipe fitting, pipe fitting surrounding forms airtight chamber, by heating pipeline pair Pipe heating makes pipe fitting melt;By lighting the fuel oil on forming module to pipe heating, fuel oil is produced in closed chamber Indoor Combustion Raw high pressure, forms the first time thermoforming to pipe fitting, inflatable thermoforming;Meanwhile by air shooter road direction forming module Conveying high-pressure gas, high pressure gas push forming convax mould to squeeze pipe fitting, form second of thermoforming to pipe fitting;Work as forming module When interior gas pressure is higher than the elastic force of spring one, is spilt in airtight chamber outside the high pressure gas in forming module, make closed chamber The tube wall of indoor generation high pressure, high pressure gas compressing pipe fitting is bonded with upper die and lower die, forms the third time thermoforming to pipe fitting, The final molding to pipe fitting is completed in inflatable thermoforming;
Step 4:After step 3 completes formation of tubes, by cooling line to cooling down outside pipe fitting, pass through ventilation Pipeline cools down to inside pipe fitting, after pipe fitting cools to pipe fitting and shapes, removes upper mold, forming module and end socket, takes Go out pipe fitting.
Spray bar is arranged in the top of the fixing body;The spray bar is connected to slideway one, spray bar lower end face slideway One, spray bar is used to spray fuel oil to forming module;Heating pipeline is both provided on the upper die and lower die, and it is adjacent to heat pipeline Nearly upper mold lower end or lower die upper end, heating pipeline are used for pipe heating;It is both provided with cooling line on the upper die and lower die, And cooling line is located at heating tube roadside side, cooling line is used to cool down pipe fitting.When work, forming module is moved to spray bar Lower section, spray bar spray fuel oil to forming module, make forming module that fuel oil is brought into airtight chamber, at this point, upper die and lower die In heating pipeline first to continuous heating outside pipe fitting, fuel oil is lighted into burning followed by igniter, and in airtight chamber Interior formation high temperature and high pressure, high temperature can assist heating to inside pipe fitting, and high pressure gas can make pipe fitting form first time inflatable Thermoforming;After pipe fitting final molding, by cooling line to being cooled down outside pipe fitting.
The forming module includes that sealing block, swivel, forming convax mould, spring one and gas lead to stops, the sealing block position In in sliding slot one, sealing block is slidably connected with fixing body, and sealing block center is provided with venthole one;The venthole one and gas Transfer pipeline is connected to;The swivel is detachable connection, swivel center perpendicular to sealing block center, between swivel and sealing block It is provided with venthole two, swivel side is provided with piston hole and venthole three;The venthole two is along swivel axial direction The blind hole of upper setting, and venthole two is connected to venthole one;The piston hole is provided with multiple, piston hole and venthole two-phase It is mutually vertical and be connected to;The forming convax mould is provided with multiple, and forming convax mould is installed on piston hole, and forming convax mould is slided with swivel Connection, forming convax mould are adapted with upper die and lower die;The perforation swivel of the venthole three, and venthole three connects with venthole two It is logical;The gas leads to stops and is located in venthole two, and gas leads to stops and is slidably matched with venthole two, and gas leads to stops for connecting Logical or closing venthole two and venthole three;The spring one is located in venthole two, one end and two end of venthole of spring one Portion is fixed, and the other end and the gas of spring one lead to stops and is fixedly connected.When work, gas transfer pipeline delivers gas to molding In the venthole one of module, as the air pressure in venthole one increases, high pressure gas compresses and forming convax mould is pushed to squeeze pipe fitting, Second of thermoforming to pipe fitting is formed, when the gas pressure in forming module is higher than the elastic force of spring one, spring one will be by Gas only logical block compression, gas, which only leads in block, is provided with only through-hole, and only through-hole is remained with venthole two and is connected to, when gas stops The venthole one that logical block is moved to one direction of spring inside forming module is connected to the airtight chamber outside forming module, that is, is stopped When through-hole is with venthole tee joint, the high pressure gas in venthole one will enter in airtight chamber, make closed chamber indoor gas liter Pressure is high pressure gas, and the tube wall of high pressure gas compressing pipe fitting is bonded with upper die and lower die, forms the third time thermoforming to pipe fitting, The final molding to pipe fitting is completed in inflatable thermoforming;After air venting in forming module, spring one pushes gas scotch multiple Position.
Bearing and impeller are provided between the swivel and sealing block, inner ring and the swivel of the bearing connect, bearing Outer ring is connect with sealing block, and bearing outside is equipped with air-tightness protective case, avoids gas leak;The impeller is fixed on swivel, Impeller drives swivel to rotate for receiving wind-force;The air pipeline is through sealing block and is connected to airtight chamber, ventilation duct Road is provided with cooling chamber and valve one;The valve one is for opening and closing air pipeline;The cooling chamber is used for logical The wind led in air pipe line carries out cooling processing.When work, bearing ensure that between swivel and sealing block as rotation connection, treat as When pattern block passes through spray bar lower end, air pipeline will dry to impeller, and impeller is made to remain a constant speed rotation, and wheel rotation is by drive Swivel rotation, so that forming convax mould follows rotation, spray bar that will uniformly smear forming convax mould surface fuel oil, fuel oil is smeared After the completion, air pipeline continues the state for making forming convax mould remain a constant speed rotation to impeller blowing to movement at pipe fitting endoporus, makes The fuel oil on forming convax mould surface is unlikely to drip because gravity assembles for a long time, when forming convax mould is just moved to pipe fitting When middle part, the wind-force that enhancing air pipeline is blown improves the velocity of rotation of forming convax mould, the combustion for making forming convax mould adhere to itself Oil is thrown away, and fuel oil is made to be attached on pipe fitting inner wall, is closed valve one, is lighted fuel oil with igniter, non-combusted fuels;When with ventilation When pipeline cools down to pipe fitting, cooled down to air pipeline with cooling chamber, cooling chamber's memory liquid storage nitrogen makes ventilation duct with liquid nitrogen cooling The wind of road blowout is cold wind, is directly cooled down to pipe fitting inner wall with cold side, improves the cooling rate of pipe fitting.
The end set of the sealing block has locating ring;The locating ring matches with pipe fitting size, locating ring cooperation envelope Head is to pipe fitting located lateral.Setting locating ring is cooperated for convenience of forming module and end socket, is positioned to pipe fitting, is made pipe The molding position of part is accurate, to improve the dimensional accuracy of formation of tubes.
The forming convax mould includes formed body and push rod, and the formed body is provided with multiple, and multiple formed bodys enclose one A circle;The push rod is located in the middle part of formed body, and push rod is vertical with formed body to be connected, and push rod is located in piston hole, push rod and piston Hole is slidably matched, and spring two is arranged on push rod, spring two is for the reset after push rod promotion;The surface of the formed body is arranged There is oilhole, the oilhole is blind hole, and the aperture of oilhole is cylindric, and the bottom hole of oilhole is spherical shape, the hole underfill aperture of oilhole More than the aperture aperture of oilhole, oilhole is for storing fuel oil.When work, the high pressure gas in venthole two is entered in piston hole simultaneously Push rod is pushed to be moved to the direction far from venthole two, formed body follows pushrod movement, spring two to be compressed, when in venthole two When the air pressure of gas reduces, spring two starts to reset, and push rod starts to reset, and formed body follows reset;Oil is set on formed body Hole is to increase forming module by the amount of smearing fuel oil, change the interior shape of oilhole, the aperture ratio oilhole hole in oilhole aperture The aperture at bottom is small, is conducive to formed body to formation of tubes, the aperture in the aperture ratio oilhole aperture of oilhole bottom hole is big, is conducive to improve Oilhole trapped fuel amount, while probability is dripped downwards to reduce fuel oil in oilhole.
The air shooter road is provided with high pressure gas supercharger and pressure-regulating valve, the high pressure gas supercharger One end connect with air inlet, the other end of high pressure gas supercharger is connect with forming module, high pressure gas supercharger for pair The gas conveyed is pressurized;Between high pressure gas supercharger and forming module, pressure is adjusted the pressure-regulating valve Valve is used to adjust the size of the conveyed gas pressure of gas transfer pipeline.It is defeated to gas by high pressure gas supercharger when work The gas boosting in pipeline is sent, the pressure of gas in gas transfer pipeline is adjusted by pressure-regulating valve, by the pressure tune of gas Save into required pressure.
The beneficial effects of the invention are as follows:
1. a kind of pipe fitting inflatable thermoforming process of the present invention, the present invention passes through pipe fitting inflatable thermoforming production equipment Improve pipe fitting inflatable thermoforming process so that pipe fitting is not necessarily to pre-bending and welding before the forming, and can directly feed intake molding, reduce The process of formation of tubes improves the efficiency of formation of tubes so that formation of tubes goes out the raising of part rate.
2. a kind of pipe fitting inflatable thermoforming process of the present invention, the present invention pass through upper die and lower die, locating ring and end socket Cooperate with each other, jointly to pipe fitting clamping position, locating ring and end socket position are adjustable, can adjust pipe fitting position at any time, protect The size for having demonstrate,proved formation of tubes improves the qualification rate of formation of tubes.
3. a kind of pipe fitting inflatable thermoforming process of the present invention, the present invention are defeated by spray bar, air pipeline, gas Send cooperating with each other for pipeline, upper die and lower die, forming module and end socket so that by being continuously molded three times, fuel oil fires pipe fitting It heats expansion and first thermoforming, moulded head is carried out to the mechanical presses thermoforming of pipe fitting and high pressure gas to pipe fitting heat expansion to pipe fitting Molding so that formation of tubes speed is fast, shaping efficiency is high, molding resilience amount is small, formed precision is high.
Description of the drawings
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is the flow chart of pipe fitting inflatable thermoforming process of the present invention;
Fig. 2 is the pipe fitting inflatable thermoforming production equipment structural schematic diagram of the present invention;
Fig. 3 is the forming module structural schematic diagram of the present invention;
Fig. 4 is the partial enlarged view at A in Fig. 3;
Fig. 5 is the swivel structure schematic diagram of the present invention;
Fig. 6 is the blade wheel structure schematic diagram of the present invention;
In figure:It is fixing body 1, spray bar 11, upper mold 2, lower die 21, heating pipeline 22, cooling line 23, forming module 3, close Seal block 31, venthole 1, locating ring 312, swivel 32, bearing 324, impeller 325, forming convax mould 33, formed body 331, oilhole 3311, push rod 332, spring 2 333, spring 1, gas lead to stops 35, venthole 2 321, piston hole 322, venthole three 323, end socket 4, gas transfer pipeline 5, high pressure gas supercharger 51, pressure-regulating valve 52, air pipeline 6, cooling chamber 61, valve One 62, airtight chamber 7, pipe fitting 8.
Specific implementation mode
In order to make the technical means, the creative features, the aims and the efficiencies achieved by the present invention be easy to understand, tie below Specific implementation mode is closed, the present invention is further explained.
As shown in figures 1 to 6, a kind of pipe fitting inflatable thermoforming process, the inflatable thermoforming process are used such as lower pipe fitting inflatable heat Forming production device, which includes fixing body 1, upper mold 2, lower die 21, forming module 3, end socket 4, gas transfer pipeline 5 and air pipeline 6, slideway one is provided in the fixing body 1, and slideway one is matched with the sliding of forming module 3 It closes, pushes forming module 3 to be slided in slideway one by hydraulic press, slideway one is slidably matched with end socket 4, is pushed by hydraulic press The sliding in slideway one of end socket 4;The upper mold 2 and lower die 21 can do open mold fortune in arrangement, upper mold 2 up and down with respect to lower die 21 Dynamic, upper mold 2 is adapted with lower die 21;For the forming module 3 between upper mold 2 and lower die 21, forming module 3 is used for pipe fitting 8 Molding, and igniter is provided on forming module 3, igniter is for lighting a fire;The end socket 4 between upper mold 2 and lower die 21, End socket 4 is enclosed airtight chamber 7 with forming module 3, upper mold 2 and lower die 21;The gas transfer pipeline 5 and forming module 3 Connection, gas transfer pipeline 5 make 8 inflatable of pipe fitting be molded for being passed through high pressure gas into airtight chamber 7;The air pipeline 6 It is connected to forming module 3, air pipeline 6 is for driving forming module 3 to rotate and for cooling down to airtight chamber 7;The present invention The high temperature is the temperature or higher temperature that can make 8 material austenitizing of pipe fitting;The high pressure of the gas refers to that can make 8 material of pipe fitting Expect the pressure or higher pressure that are deformed;
The inflatable thermoforming process includes the following steps:
Step 1:It takes and needs molding pipe fitting 8, and pipe fitting 8 is put into 21 upper end of lower die;
Step 2:After step 1 pipe fitting 8 places, 2 downlink of upper mold is controlled, upper mold 2 is molded with lower die 21 by pipe fitting 8 Upper and lower positions, and control end socket 4 is moved to 8 direction of pipe fitting, with end socket 4 by a side positioning of pipe fitting 8, control forming module 3 to 8 direction of pipe fitting is moved, with forming module 3 to another side positioning of pipe fitting 8, when forming module 3 is by 11 lower end of spray bar, oil spout Pipe 11 sprays fuel oil on forming module 3;
Step 3:After step 2 is completed to the positioning of pipe fitting 8,8 surrounding of pipe fitting forms airtight chamber 7, passes through heating tube Pipe fitting 8 is heated on road 22, and pipe fitting 8 is made to melt;Pipe fitting 8 is heated by lighting the fuel oil on forming module 3, fuel oil is in closed chamber Burning generates high pressure in room 7, forms the first time thermoforming to pipe fitting 8, inflatable thermoforming;Meanwhile passing through gas transfer pipeline 5 The conveying high-pressure gas into forming module 3, high pressure gas push forming convax mould 33 to squeeze pipe fitting 8, form second to pipe fitting 8 Thermoforming;When the gas pressure in forming module 3 is higher than the elastic force of spring 1, the high pressure gas in forming module 3 is excessive Into airtight chamber 7, make to generate high pressure in airtight chamber 7, high pressure gas oppresses the tube wall of pipe fitting 8 and upper mold 2 and lower die 21 are pasted It closes, forms the third time thermoforming to pipe fitting 8, the final molding to pipe fitting 8 is completed in inflatable thermoforming;
Step 4:After step 3 completes the molding of pipe fitting 8, by cooling line 23 to cooling down outside pipe fitting 8, pass through Air pipeline 6 after pipe fitting 8 cools to pipe fitting 8 and shapes, removes upper mold 2, forming module 3 to cooling down inside pipe fitting 8 With end socket 4, pipe fitting 8 is taken out.
Spray bar 11 is arranged in the top of the fixing body 1;The spray bar 11 is connected to slideway one, and spray bar is rectified for 11 times To slideway one, spray bar 11 is used to spray fuel oil to forming module 3;It is both provided with heating pipeline in the upper mold 2 and lower die 21 22, and pipeline 22 is heated adjacent to 21 upper end of 2 lower end of upper mold or lower die, heating pipeline 22 is used to heat pipe fitting 8;The upper mold 2 Be both provided with cooling line 23 in lower die 21, and cooling line 23 is located at heating 22 side of pipeline, cooling line 23 for pair Pipe fitting 8 cools down.When work, forming module 3 is moved to 11 lower section of spray bar, and spray bar 11 sprays fuel oil to forming module 3, makes into Fuel oil is brought into airtight chamber 7 by pattern block 3, at this point, the heating pipeline 22 in upper mold 2 and lower die 21 outside pipe fitting 8 first to holding Fuel oil is lighted burning, and the formation high temperature and high pressure in airtight chamber 7 by continuous heating followed by igniter, and high temperature can be with To 8 inside auxiliary heating of pipe fitting, high pressure gas can make pipe fitting 8 form first time inflatable thermoforming;Wait for 8 final molding of pipe fitting Afterwards, by cooling line 23 to being cooled down outside pipe fitting 8.
The forming module 3 includes that sealing block 31, swivel 32, forming convax mould 33, spring 1 and gas lead to stops 35, institute It states sealing block 31 to be located in sliding slot one, sealing block 31 is slidably connected with fixing body 1, and 31 center of sealing block is provided with venthole one 311;The venthole 1 is connected to gas transfer pipeline 5;The swivel 32 perpendicular to the center of sealing block 31, swivel 32 with It is detachable connection between sealing block 31,32 centers of swivel are provided with venthole 2 321, and 32 sides of swivel are provided with piston hole 322 and venthole 3 323;The venthole 2 321 is along the blind hole that is arranged on 32 axial directions of swivel, and venthole two 321 are connected to venthole 1;The piston hole 322 is provided with multiple, and piston hole 322 and venthole 2 321 are mutually perpendicular to simultaneously Connection;The forming convax mould 33 is provided with multiple, and forming convax mould 33 is installed on piston hole 322, forming convax mould 33 and swivel 32 It is slidably connected, forming convax mould 33 is adapted with upper mold 2 and lower die 21;The perforation of the venthole 3 323 swivel 32, and venthole three 323 are connected to venthole 2 321;The gas leads to stops 35 and is located in venthole 2 321, and gas leads to stops 35 and venthole two 321 are slidably matched, and gas leads to stops 35 for being connected to or closing venthole 2 321 and venthole 3 323;One 34, the spring In in venthole 2 321, one end and 2 321 end of venthole of spring 1 are fixed, and the other end and gas of spring 1 are logical Stops 35 is fixedly connected.When work, gas transfer pipeline 5 delivers gas in the venthole 1 of forming module 3, with Air pressure in venthole 1 increases, and high pressure gas compress and forming convax mould 33 is pushed to squeeze pipe fitting 8, formation to pipe fitting 8 the Secondary thermoforming, when the gas pressure in forming module 3 is higher than the elastic force of spring 1, spring 1 will only lead to block by gas Compression, gas are only provided with only through-hole in logical block, and only through-hole is remained with venthole 2 321 and be connected to, when gas stop lead to block to The venthole 1 that one 34 direction of spring is moved to inside forming module 3 is connected to the airtight chamber 7 outside forming module 3, i.e., When only through-hole is connected to venthole 3 323, the high pressure gas in venthole 1 will enter in airtight chamber 7, make airtight chamber Gas boost is high pressure gas in 7, and the tube wall of high pressure gas compressing pipe fitting 8 is bonded with upper mold 2, lower die 21, is formed to pipe fitting 8 The final molding to pipe fitting 8 is completed in third time thermoforming, inflatable thermoforming;After air venting in forming module 3, spring one 34 push gas stop block reset.
Be provided with bearing 324 and impeller 325 between the swivel 32 and sealing block 31, the inner ring of the bearing 324 with turn Body 32 connects, and the outer ring of bearing 324 is connect with sealing block 31, is arranged with air-tightness protective case outside bearing 324, avoids outside gas It lets out;The impeller 325 is fixed on swivel 32, and impeller 325 drives 32 rotation of swivel for receiving wind-force;The air pipeline 6 run through sealing block 31 and are connected to airtight chamber 7, and cooling chamber 61 and valve 1 are provided on air pipeline 6;The valve one 62 for opening and closing air pipeline 6;The cooling chamber 61 is used to carry out cooling processing to the wind led in air pipeline 6. When work, bearing 324 ensure that be rotatablely connected between swivel 32 and sealing block 31, when forming module 3 is by under spray bar 11 When end, air pipeline 6 will dry to impeller 325, and impeller 325 is made to remain a constant speed rotation, and the rotation of impeller 325 will drive 32 turns of swivel Dynamic, so that forming convax mould 33 follows rotation, spray bar 11 that will uniformly smear 33 surface of forming convax mould fuel oil, fuel oil is smeared After the completion, air pipeline 6 continues to dry to impeller 325, make forming convax mould 33 remain a constant speed rotation state at 8 endoporus of pipe fitting It is mobile, make the fuel oil on 33 surface of forming convax mould be unlikely to drip because gravity assembles for a long time, when forming convax mould 33 just When being moved to 8 middle part of pipe fitting well, the wind-force that enhancing air pipeline 6 is blown improves the velocity of rotation of forming convax mould 33, keeps molding convex Mould 33 throws away the fuel oil that itself adheres to, and fuel oil is made to be attached on 8 inner wall of pipe fitting, closes valve 1, with igniter by fuel oil It lights, non-combusted fuels;When being cooled down to pipe fitting 8 with air pipeline 6, cooled down to air pipeline 6 with cooling chamber 61, in cooling chamber 61 Liquid nitrogen is stored, with liquid nitrogen cooling, it is cold wind to make the wind that air pipeline 6 is blown out, and is directly cooled down to 8 inner wall of pipe fitting with cold side, is improved The cooling rate of pipe fitting 8.
The end set of the sealing block 31 has locating ring 312;The locating ring 312 matches with 8 size of pipe fitting, positioning Ring 312 coordinates end socket 4 to 8 located lateral of pipe fitting.Setting locating ring 312 is cooperated for convenience of forming module 3 and end socket 4, Pipe fitting 8 is positioned, keeps 8 molding position of pipe fitting accurate, to improve 8 molding dimensional accuracy of pipe fitting.
The forming convax mould 33 includes formed body 331 and push rod 332, and the formed body 331 is provided with multiple, multiple moldings Body 331 encloses a circle;The push rod 332 is located at 331 middle part of formed body, and push rod 332 is vertical with formed body 331 to be connected, and is pushed away Bar 332 is located in piston hole 322, and push rod 332 is slidably matched with piston hole 322, and spring 2 333, spring are arranged on push rod 332 2 333 for the reset after the promotion of push rod 332;The surface of the formed body 331 is provided with oilhole 3311, and the oilhole 3311 is Blind hole, and the aperture of oilhole 3311 is cylindric, the bottom hole of oilhole 3311 is spherical shape, and the hole underfill aperture of oilhole 3311 is more than oil The aperture aperture in hole 3311, oilhole 3311 is for storing fuel oil.When work, the high pressure gas in venthole 2 321 is entered piston In hole 322 and push rod 332 is pushed to be moved to the direction far from venthole 2 321, formed body 331 follows push rod 332 to move, spring 2 333 are compressed, and when the air pressure of gas in venthole 2 321 reduces, spring 2 333 starts to reset, and push rod 332 starts multiple Position, formed body 331 follow reset;Oilhole 3311 is set on formed body 331, is to increase forming module 3 by smearing fuel oil Amount, change oilhole 3311 interior shape, the aperture of 3311 bottom hole of aperture ratio oilhole in 3311 aperture of oilhole is small, is conducive into Type body 331 is molded pipe fitting 8, and the aperture in 3311 aperture of aperture ratio oilhole of 3311 bottom hole of oilhole is big, is conducive to improve oilhole 3311 trapped fuel amounts, while probability is dripped downwards to reduce fuel oil in oilhole 3311.
High pressure gas supercharger 51 and pressure-regulating valve 52, the high pressure gas are provided on the gas transfer pipeline 5 One end of supercharger 51 is connect with air inlet, and the other end of high pressure gas supercharger 51 is connect with forming module 3, and high pressure gas increases Press 51 is for being pressurized the gas conveyed;The pressure-regulating valve 52 is located at high pressure gas supercharger 51 and shaping mould Between block 3, pressure-regulating valve 52 is used to adjust the size of 5 conveyed gas pressure of gas transfer pipeline.When work, pass through high pressure Gas-booster 51 adjusts gas in gas transfer pipeline 5 to the gas boosting in gas transfer pipeline 5, by pressure-regulating valve 52 The pressure of gas is adjusted to required pressure by the pressure of body.
Specific workflow is as follows:
In use, control 2 downlink of upper mold, upper mold 2 mold with lower die 21 and position the upper and lower of pipe fitting 8, end socket 4 is controlled It is moved to 8 direction of pipe fitting, with end socket 4 by a side positioning of pipe fitting 8, control forming module 3 is moved to 8 direction of pipe fitting, with molding Module 3 is to another side positioning of pipe fitting 8, and when forming module 3 is moved to 11 lower section of spray bar, air pipeline 6 will be to impeller 325 Blowing makes impeller 325 remain a constant speed rotation, and the rotation of impeller 325 will drive swivel 32 to rotate, so that forming convax mould 33 follows Rotation, spray bar 11 will uniformly smear 33 surface of forming convax mould fuel oil, and after the completion of fuel oil is smeared, air pipeline 6 continues to leaf 325 blowing of wheel makes the remain a constant speed state of rotation of forming convax mould 33 be moved at 8 endoporus of pipe fitting, when forming convax mould 33 just moves When moving 8 middle part of pipe fitting, locating ring 312 cooperates with end socket 4, and accurate clamping position, 8 surrounding shape of pipe fitting are carried out to pipe fitting 8 At airtight chamber 7, at this point, improving the wind-force that air pipeline 6 is provided, the velocity of rotation of forming convax mould 33 is improved, keeps molding convex Mould 33 throws away the fuel oil that itself adheres to, and after so that fuel oil is attached on 8 inner wall of pipe fitting, closes valve 1, and pass through heating tube Pipe fitting 8 is heated on road 22, and pipe fitting 8 is made to melt;Fuel oil is lighted with igniter, pipe fitting 8 is heated by non-combusted fuels, fuel oil exists Burning generates high pressure in airtight chamber 7, forms the first time thermoforming to pipe fitting 8, inflatable thermoforming;Complete first time thermoforming Afterwards, gas transfer pipeline 5 delivers gas in the venthole 1 of forming module 3, with the air pressure in venthole 1 It increases, high pressure gas pushes forming convax mould 33 to expand outwardly, and forming convax mould 33 squeezes pipe fitting 8, forms second of the heat to pipe fitting 8 Molding, when the air pressure of gas in venthole 2 321 reduces, spring 2 333 starts to reset, and push rod 332 starts to reset, and molding is convex Mould 33 resets;When the gas pressure in forming module 3 is higher than the elastic force of spring 1, spring 1 will only lead to block pressure by gas Contracting, when only logical block is moved to one 34 direction of spring outside the venthole 1 inside forming module 3 and forming module 3 gas Airtight chamber 7 when being connected to, the high pressure gas in venthole 1 will enter in airtight chamber 7, make gas in airtight chamber 7 Boosting is high pressure gas, and the tube wall of high pressure gas compressing pipe fitting 8 is bonded with upper mold 2, lower die 21, forms the third time to pipe fitting 8 The final molding to pipe fitting 8 is completed in thermoforming, inflatable thermoforming;High pressure gas supercharger 51 and pressure-regulating valve 52 are closed, is made After air venting in forming module 3, spring 1 pushes gas stop block reset;After 8 final molding of pipe fitting, pass through cooling Pipeline 23 outside pipe fitting 8 to cooling down, by air pipeline 6 to cooling down inside pipe fitting 8, wait for pipe fitting 8 cool to After pipe fitting 8 is shaped, upper mold 2, forming module 3 and end socket 4 are removed, takes out pipe fitting 8.
The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should Understand, the present invention is not limited to the above embodiments, and the above embodiments and description only describe the originals of the present invention Reason, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes and improvements It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle It is fixed.

Claims (7)

1. a kind of pipe fitting inflatable thermoforming process, it is characterised in that:The inflatable thermoforming process use as lower pipe fitting inflatable heat at Type production equipment, the pipe fitting inflatable thermoforming production equipment include fixing body (1), upper mold (2), lower die (21), forming module (3), end socket (4), gas transfer pipeline (5) and air pipeline (6), are provided with slideway one in the fixing body (1), slideway one with Forming module (3) is slidably matched, and slideway one is slidably matched with end socket (4);The upper mold (2) and lower die (21) are in arrange up and down, Upper mold (2) can do die open/close movement with respect to lower die (21), and upper mold (2) is adapted with lower die (21);Forming module (3) position Between upper mold (2) and lower die (21), forming module (3) is molded for pipe fitting (8);The end socket (4) be located at upper mold (2) and under Between mould (21), end socket (4) is enclosed airtight chamber (7) with forming module (3), upper mold (2) and lower die (21);The gas Transfer pipeline (5) is connected to forming module (3), and gas transfer pipeline (5), which is used to be passed through high pressure gas into airtight chamber (7), to be made Pipe fitting (8) inflatable is molded;The air pipeline (6) is connected to forming module (3), and air pipeline (6) is for driving forming module (3) it rotates and for cooling down to airtight chamber (7);
The inflatable thermoforming process includes the following steps:
Step 1:It takes and needs molding pipe fitting (8), and pipe fitting (8) is put into pipe fitting inflatable thermoforming production equipment;
Step 2:After step 1 pipe fitting (8) places, upper mold (2) downlink is controlled, upper mold (2) will pipe with lower die (21) molding The upper and lower of part (8) positions, and control end socket (4) is moved to pipe fitting (8) direction, with end socket (4) by a side positioning of pipe fitting (8), It controls forming module (3) to move to pipe fitting (8) direction, with forming module (3) to another side positioning of pipe fitting (8);
Step 3:It is right by forming module (3), upper mold (2) and lower die (21) after step 2 is completed to the positioning of pipe fitting (8) Pipe fitting (8) heating melting, is molded pipe fitting (8) with forming module (3) cooperation upper mold (2), lower die (21);
Step 4:After step 3 completes pipe fitting (8) molding, pipe fitting (8) is cooled down to pipe fitting (8) and is shaped, then Upper mold (2), forming module (3) and end socket (4) are removed, pipe fitting (8) is taken out.
2. a kind of pipe fitting inflatable thermoforming process according to claim 1, it is characterised in that:The fixing body (1) it is upper Spray bar (11) is arranged in portion;The spray bar (11) is connected to slideway one, spray bar (11) lower end face slideway one, spray bar (11) it is used to spray fuel oil to forming module (3);Heating pipeline (22) is both provided on the upper mold (2) and lower die (21), and Pipeline (22) neighbouring upper mold (2) lower end or lower die (21) upper end are heated, heating pipeline (22) is used to heat pipe fitting (8);It is described Cooling line (23) is both provided in upper mold (2) and lower die (21), and cooling line (23) is located at heating pipeline (22) side, it is cold But pipeline (23) is used for cooling to pipe fitting (8).
3. a kind of pipe fitting inflatable thermoforming process according to claim 1, it is characterised in that:Forming module (3) packet It includes sealing block (31), swivel (32), forming convax mould (33), spring one (34) and gas and leads to stops (35), the sealing block (31) In sliding slot one, sealing block (31) is slidably connected with fixing body (1), and sealing block (31) center is provided with venthole one (311); The venthole one (311) is connected to gas transfer pipeline (5);The swivel (32) is perpendicular to sealing block (31) center, swivel (32) between sealing block (31) it is detachable connection, swivel (32) center is provided with venthole two (321), turns (32) side Portion is provided with piston hole (322) and venthole three (323);The venthole two (321) is along on swivel (32) axial direction The blind hole of setting, and venthole two (321) is connected to venthole one (311);The piston hole (322) is provided with multiple, piston Hole (322) is mutually perpendicular to and is connected to venthole two (321);The forming convax mould (33) is provided with multiple, forming convax mould (33) Be installed on piston hole (322), forming convax mould (33) is slidably connected with swivel (32), forming convax mould (33) and upper mold (2) and under Mould (21) is adapted;The venthole three (323) perforation swivel (32), and venthole three (323) connects with venthole two (321) It is logical;The gas leads to stops (35) and is located in venthole two (321), and gas leads to stops (35) matches with venthole two (321) sliding It closes, gas leads to stops (35) for being connected to or closing venthole two (321) and venthole three (323);The spring one (34) position In venthole two (321), one end and venthole two (321) end of spring one (34) are fixed, the other end of spring one (34) Lead to stops (35) with gas to be fixedly connected.
4. a kind of pipe fitting inflatable thermoforming process according to claim 3, it is characterised in that:The swivel (32) and sealing Bearing (324) and impeller (325) are provided between block (31), the inner ring of the bearing (324) is connect with swivel (32), bearing (324) outer ring is connect with sealing block (31), and air-tightness protective case is arranged with outside bearing (324);The impeller (325) is fixed on It turns on (32), impeller (325) drives swivel (32) to rotate for receiving wind-force;The air pipeline (6) runs through sealing block (31) and with airtight chamber (7) it is connected to, cooling chamber (61) and valve one (62) is provided on air pipeline (6);The valve one (62) sealing block (31) one end is closed on, valve one (62) is for opening and closing air pipeline (6);The cooling chamber (61) is used for Cooling processing is carried out to the wind led in air pipeline (6).
5. a kind of pipe fitting inflatable thermoforming process according to claim 3, it is characterised in that:The end of the sealing block (31) Portion is provided with locating ring (312);The locating ring (312) matches with pipe fitting (8) size, and locating ring (312) coordinates end socket (4) To pipe fitting (8) located lateral.
6. a kind of pipe fitting inflatable thermoforming process according to claim 3, it is characterised in that:Forming convax mould (33) packet Include formed body (331) and push rod (332), the formed body (331) is provided with multiple, and multiple formed bodys (331) enclose one Circle;The push rod (332) is located in the middle part of formed body (331), and push rod (332) is vertical with formed body (331) to be connected, push rod (332) In piston hole (322), push rod (332) is slidably matched with piston hole (322), and push rod is arranged with spring two on (332) (333), the reset after spring two (333) is pushed for push rod (332);The surface of the formed body (331) is provided with oilhole (3311), the oilhole (3311) is blind hole, and the aperture of oilhole (3311) is cylindric, and the bottom hole of oilhole (3311) is spherical shape Shape, the hole underfill aperture of oilhole (3311) are more than the aperture aperture of oilhole (3311), and oilhole (3311) is for storing fuel oil.
7. a kind of pipe fitting inflatable thermoforming process according to claim 1, it is characterised in that:The gas transfer pipeline (5) be provided with high pressure gas supercharger (51) and pressure-regulating valve (52) on, one end of the high pressure gas supercharger (51) with Air inlet connects, and the other end of high pressure gas supercharger (51) is connect with forming module (3), and high pressure gas supercharger (51) is used for The gas conveyed is pressurized;The pressure-regulating valve (52) is located at high pressure gas supercharger (51) and forming module (3) Between, pressure-regulating valve (52) is used to adjust the size of gas transfer pipeline (5) conveyed gas pressure.
CN201810463709.3A 2018-05-15 2018-05-15 A kind of pipe fitting inflatable thermoforming process Active CN108655250B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05229004A (en) * 1992-02-21 1993-09-07 Mitsubishi Plastics Ind Ltd Manufacture of lining hume pipe
JPH1015625A (en) * 1996-07-05 1998-01-20 Hiroshima Pref Gov Apparatus for production of laminated metallic material by gas pressure welding and manufacture of its production as well as worked product of laminated metallic material
CN1824418A (en) * 2005-09-01 2006-08-30 孙旭光 Internal heating metal pipe material high temperature ultrahigh water pressure once shaping technology, method and equipment
CN101468373A (en) * 2007-12-30 2009-07-01 哈尔滨理工大学 Self-heating type superplastic gas bulging forming die for alloy sheet
CN104525676A (en) * 2014-12-08 2015-04-22 无锡朗贤汽车组件研发中心有限公司 Gas bulging hot formation segmentation strengthening process of boron steel tube
CN105234248A (en) * 2015-06-19 2016-01-13 新昌县航达机械制造有限公司 Rigid and plastic compound multi-cylinder type bulging forming equipment for t-branch pipe

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05229004A (en) * 1992-02-21 1993-09-07 Mitsubishi Plastics Ind Ltd Manufacture of lining hume pipe
JPH1015625A (en) * 1996-07-05 1998-01-20 Hiroshima Pref Gov Apparatus for production of laminated metallic material by gas pressure welding and manufacture of its production as well as worked product of laminated metallic material
CN1824418A (en) * 2005-09-01 2006-08-30 孙旭光 Internal heating metal pipe material high temperature ultrahigh water pressure once shaping technology, method and equipment
CN101468373A (en) * 2007-12-30 2009-07-01 哈尔滨理工大学 Self-heating type superplastic gas bulging forming die for alloy sheet
CN104525676A (en) * 2014-12-08 2015-04-22 无锡朗贤汽车组件研发中心有限公司 Gas bulging hot formation segmentation strengthening process of boron steel tube
CN105234248A (en) * 2015-06-19 2016-01-13 新昌县航达机械制造有限公司 Rigid and plastic compound multi-cylinder type bulging forming equipment for t-branch pipe

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