CN106734340B - A kind of preparation method of bend pipe tee tube - Google Patents
A kind of preparation method of bend pipe tee tube Download PDFInfo
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- CN106734340B CN106734340B CN201510814564.3A CN201510814564A CN106734340B CN 106734340 B CN106734340 B CN 106734340B CN 201510814564 A CN201510814564 A CN 201510814564A CN 106734340 B CN106734340 B CN 106734340B
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
- B21C37/29—Making branched pieces, e.g. T-pieces
- B21C37/294—Forming collars by compressing a fluid or a yieldable or resilient mass in the tube
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping 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
- B21D26/033—Deforming tubular bodies
- B21D26/037—Forming branched tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping 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
- B21D26/033—Deforming tubular bodies
- B21D26/041—Means for controlling fluid parameters, e.g. pressure or temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping 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
- B21D26/033—Deforming tubular bodies
- B21D26/047—Mould construction
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
A kind of preparation method of bend pipe tee tube, first by round pipe, the length according to required for forming part is cut；Then round pipe is directly made by T-type straight tee (ST.TEE) using interior high-pressure molding technology；T-type straight tee (ST.TEE) is bent, i.e., molding straight tee (ST.TEE) part is put into mold cavity, Guan Bi mould is shaped to required preformed part；Preformed part is made annealing treatment, machining stress is eliminated；The sweep tee after annealing, interior Belt-type tools are put into, carry out interior high-pressure molding, so that part outer surface fitting mold cavity obtains final products.Have the advantages that knee thickness be thinned degree is low, is able to satisfy requirement.
Description
Technical field
The present invention relates to bending pipe fitting Bulging Technology fields, and in particular to a kind of preparation method of bend pipe tee tube.
Background technique
In the enmgine exhaust of automobile, because structure is complicated, butt welding process and casting technique are mostly used in the past.With liquid
The tee tube of the rise of molded technology, straight forming largely puts into application.It, can be straight with tubing by special interior high-tension apparatus
It is connected into type tee tube.In actual fabrication, other than straight tee (ST.TEE), there are also bend pipe tee tube, straight tee (ST.TEE) can axially feed supplement simultaneously, at
Type gets up process stabilizing, and the threeway thickness molded is also thicker.And bend pipe threeway, concrete technology flow process are as follows: blanking --- it is curved
--- --- first time forms --- annealing --- second forms pipe for annealing；Therefore, which first carries out bending pipes,
When bend pipe, the wall thickness of crooked position has been thinned 20% or so since deformation (stretching) is first, carries out threeway again at this time
First time molding position be then thinned just be easy to by both ends effect length, the interior angle in knee creases easily when molding, at
The tee tube wall thickness of type is often very thin, causes the thickness in final knee to be thinned and reaches 40%~50%, therefore use is not achieved
It is required that causing great security risk.
Summary of the invention
The present invention is directed to the above-mentioned deficiency of the prior art, provides a kind of knee thickness and is thinned that degree is low, is able to satisfy use
It is required that bend pipe tee tube preparation method.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows: a kind of preparation method of bend pipe tee tube,
Step includes:
(1) blanking: by round pipe, the length according to required for forming part is cut；
(2) it forms straight tee (ST.TEE): directly the round pipe of step (1) being made using interior high-pressure molding technology (fluid power molding)
Round pipe is placed in T-die using hydraulic molding technique, T-type type chamber, T is provided in T-die by T-type straight tee (ST.TEE)
Type type chamber includes the cross through hole and longitudinal hole being mutually orthogonal to one another, and the round pipe is placed in cross through hole, then
It carries out hydro-forming and obtains T-type straight tee (ST.TEE) pipe；
(3) bend pipe: the one end for the T-type straight tee (ST.TEE) pipe that step (2) are obtained keeps straight tube, and the other end is carried out using bending machine
Bending, the caliber (radius) of bending radius (i.e. the radius of the bending circular arc of bend pipe central axis) and bend pipe of bending part
The ratio between be 1.3-1.6；Then pipe after bending is placed in shaping mould and is squeezed, preformed part required for obtaining
(the curved pipe in one end is bent according to the planform of final part in advance that is, avoids subsequent bend pipe three-way forming
When, generate overlap the defects of)；
(4) it anneals: step (3) acquisition preformed part being made annealing treatment, machining stress is eliminated；
(5) form bend pipe threeway: the sweep tee after annealing, being put into interior Belt-type tools, carry out in high-pressure and hydraulic at
Type, so that part outer surface is bonded mold cavity.
The hydro-forming of step (2) of the present invention is divided into six sections of processes, and inlet amount 0.4-0.6mm/s is (i.e. left on the left of first segment
Side ducts to centre squeeze process), right side inlet amount be 1.2-1.6mm/s (i.e. right side pipeline to centre squeeze process),
The pressure that the left and right sides enters the oil of hydraulic cylinder is that 20-30MPa (pushes the pressure of piston for the oil of hydraulic cylinder herein, promotees
Make piston that liquid be pushed to enter and realize pressurization inside tee tube), the fluid pressure inside pipeline is 15-25MPa, continues 1-3s；
Inlet amount 3.0-3.6mm/s (i.e. process of the left side pipeline to centre extruding), right side inlet amount are 0.3- on the left of second segment
0.6mm/s, the pressure that the left and right sides enters the oil of hydraulic cylinder is 20-30MPa, and the fluid pressure inside pipeline is 25-
35MPa continues 1-3s；Inlet amount 3.0-3.5mm/s on the left of third section (i.e. left side pipeline squeezed to centre process), right side into
Doses is 0.3-0.6mm/s, and the pressure that the left and right sides enters the oil of hydraulic cylinder is 20-30MPa, the fluid pressure inside pipeline
For 35-45MPa, continue 1-3s；4th section of left side inlet amount 2.5-3.5mm/s (i.e. process of the left side pipeline to centre extruding),
Right side inlet amount is 0.3-0.6mm/s, and the pressure that the left and right sides enters the oil of hydraulic cylinder is 20-30MPa, the liquid inside pipeline
Body pressure is 45-55MPa, continues 1-3s；(i.e. left side pipeline squeezes 5th section of left side inlet amount 2.2-3.0mm/s to centre
Process), right side inlet amount be 0.2-0.5mm/s, the left and right sides enter hydraulic cylinder oil pressure be 20-30MPa, pipeline
Internal fluid pressure is 55-65MPa, continues 1-3s；(i.e. left side pipeline is in by 6th section of left side inlet amount 2.2-3.0mm/s
Between the process that squeezes), right side inlet amount be 0.05-0.3mm/s, the pressure that the left and right sides enters the oil of hydraulic cylinder is 20-
30MPa, the fluid pressure inside pipeline are 65-75MPa, continue 1-3s.
The interior high-pressure and hydraulic molding of step (5) of the present invention is divided into five sections of processes, inlet amount 0.5-1.5mm/s on the left of first segment
(i.e. process of the left side pipeline to centre extruding), right side inlet amount are 0.5-1.5mm/s, and the left and right sides enters the oil of hydraulic cylinder
Pressure be 20-30MPa, the fluid pressure inside pipeline is 15-25MPa, continues 1-3s；Inlet amount 1.5- on the left of second segment
2.3mm/s (i.e. process of the left side pipeline to centre extruding), right side inlet amount are 0.1-0.5mm/s, and the left and right sides enters hydraulic
The pressure of the oil of oil cylinder is 20-30MPa, and the fluid pressure inside pipeline is 30-35MPa, continues 1-3s；Charging on the left of third section
Measure 1.0-2.0mm/s (i.e. left side pipeline to centre squeeze process), right side inlet amount be 0.1-0.5mm/s, the left and right sides into
The pressure for entering the oil of hydraulic cylinder is 20-30MPa, and the fluid pressure inside pipeline is 45-55MPa, continues 1-3s；4th section
Left side inlet amount 1.0-2.0mm/s (i.e. process of the left side pipeline to centre extruding), right side inlet amount are 0.1-0.5mm/s, left
The pressure that right two sides enter the oil of hydraulic cylinder is 20-30MPa, and the fluid pressure inside pipeline is 60-70MPa, continues 1-
3s；5th section of left side inlet amount 0.1-0.5mm/s (i.e. process of the left side pipeline to centre extruding), right side inlet amount are 0.1-
0.5mm/s, the pressure that the left and right sides enters the oil of hydraulic cylinder is 20-30MPa, and the fluid pressure inside pipeline is 120-
130MPa continues 1-3s.
The bright annealing of above-mentioned steps (4) of the present invention being annealed under 950-1050 DEG C of high temperature of temperature.
Above-mentioned steps (5) of the present invention make part outer surface be bonded after mold cavity the pressure maintaining 2-5s at 125-130MPa.
The advantages of the present invention:
1. its key point of technique of the invention is the sequence of its processing, i.e., T-type straight tee (ST.TEE) first is modified to by straight tube is hydraulic,
The process is easy to process, and technical maturity is easily operated, and the carry out axial supplement that can be convenient, the T-type straight tee (ST.TEE) straight tube of acquisition
Wall thickness is controllable；In addition, not needing to use multiple sets of molds instead, in one set of die without being added in the forming process of straight tee (ST.TEE) yet
By the accurate control of six sections of hydro-forming parameters, the straight tee (ST.TEE) pipe fitting for meeting use condition is obtained；Due to using six Duan Xun
The progressive deformation pattern of sequence, so that the tube wall of straight tee (ST.TEE) pipe fitting is evenly distributed, ratio of briquetting is high, and mentions for subsequent bend pipe and shaping
Good basis and premise are supplied.
2. preparation method of the invention avoids whole bend pipe brings curved by the way of the straight tube other end bend pipe of one end
The problem of bent portions interior angle wrinkles, and distribution has carried out mold press-bending into prefabricated component and annealing operation before shaping, guarantees
The stability of material property provides good basis and premise, and straight tee (ST.TEE) intermediate projections positions for subsequent shaping
It is vertical with flexure plane, the problem of crooked position interior angle wrinkles also is overcome to a certain degree, and final products of the present invention carry out
Shape correction, and strict control truing phase is five sections, so that final shaped article yield rate greatly improves, overcomes abnormity
Threeway ridging defect.
Detailed description of the invention
The T-type straight tee (ST.TEE) structural schematic diagram of the present invention of attached drawing 1.
The bend pipe three-port structure schematic diagram of 2 the method for the present invention of attached drawing preparation.
3 invention T-type straight tee (ST.TEE) of attached drawing prepares mold structure diagram.
Specific embodiment
The present invention is described in detail combined with specific embodiments below, but the present invention is not limited solely to following embodiment.
Embodiment
Using son for 1Cr18Ni9Ti stainless steel tube material, then according to the method for the present invention, prepare as described in attached drawing 2
The product of structure:
(1) blanking: being 38mm by commercially available 1Cr18Ni9Ti diameter, the stainless steel tube of thickness 1.3mm is according to forming part institute
The length needed carries out the straight tube for being cut into length 30cm；
(2) it forms straight tee (ST.TEE): directly the round pipe of step (1) being made using interior high-pressure molding technology (fluid power molding)
Round pipe is placed in T-die using hydraulic molding technique, T-type type chamber, T is provided in T-die by T-type straight tee (ST.TEE)
Type type chamber includes the cross through hole and longitudinal hole being mutually orthogonal to one another, and the round pipe is placed in cross through hole, then
It carries out hydro-forming and obtains T-type straight tee (ST.TEE) pipe；Hydro-forming is divided into six sections of processes, and inlet amount 0.5mm/s is (i.e. left on the left of first segment
Side ducts to centre squeeze process), right side inlet amount be 1.5mm/s, the left and right sides enter hydraulic cylinder oil pressure be
25MPa, the fluid pressure inside pipeline are 20MPa, continue 2s；(i.e. left side pipeline is in by inlet amount 3.4mm/s on the left of second segment
Between the process that squeezes), right side inlet amount be 0.5mm/s, the pressure that the left and right sides enters the oil of hydraulic cylinder is 25MPa, pipeline
Internal fluid pressure is 30MPa, continues 2s；Inlet amount 3.2mm/s on the left of third section (i.e. left side pipeline squeezed to centre into
Journey), right side inlet amount be 0.4mm/s, the pressure that the left and right sides enters the oil of hydraulic cylinder is 25MPa, the liquid inside pipeline
Pressure is 40MPa, continues 1-3s；4th section of left side inlet amount 3.0mm/s (i.e. process of the left side pipeline to centre extruding), right side
Inlet amount is 0.3mm/s, and the pressure that the left and right sides enters the oil of hydraulic cylinder is 25MPa, and the fluid pressure inside pipeline is
50MPa continues 2s；5th section of left side inlet amount 2.8mm/s (i.e. process of the left side pipeline to centre extruding), right side inlet amount are
0.2mm/s, the pressure that the left and right sides enters the oil of hydraulic cylinder is 25MPa, and the fluid pressure inside pipeline is 60MPa, is continued
3s；6th section of left side inlet amount 2.6mm/s (i.e. process of the left side pipeline to centre extruding), right side inlet amount are 0.1mm/s, left
The pressure that right two sides enter the oil of hydraulic cylinder is 25MPa, and the fluid pressure inside pipeline is 70MPa, continues 2s；It obtains intermediate
The straight tee (ST.TEE) of the boss of 16mm high.
(3) bend pipe: the one end for the T-type straight tee (ST.TEE) pipe that step (2) are obtained keeps straight tube, and the other end is carried out using bending machine
Bending, the caliber (radius) of bending radius (i.e. the radius of the bending circular arc of bend pipe central axis) and bend pipe of bending part
The ratio between be 1.3-1.6；Then pipe after bending is placed in shaping mould and is squeezed, preformed part required for obtaining
(the curved pipe in one end is bent according to the planform of final part in advance that is, avoids subsequent bend pipe three-way forming
When, generate overlap the defects of)；
(4) it anneals: step (3) acquisition preformed part being made annealing treatment, machining stress is eliminated, in 1000-1050
Bright annealing is carried out at DEG C；
(5) form bend pipe threeway: the sweep tee after annealing, being put into interior Belt-type tools, carry out in high-pressure and hydraulic at
Type, so that part outer surface is bonded mold cavity；Interior high-pressure and hydraulic molding is divided into five sections of processes, inlet amount on the left of first segment
1.0mm/s (i.e. process of the left side pipeline to centre extruding), right side inlet amount are 1.0mm/s, and the left and right sides enters hydraulic cylinder
The pressure of oil be 25MPa, the fluid pressure inside pipeline is 20MPa, continues 2s；Second segment left side inlet amount 1.8mm/s is (i.e.
Left side pipeline to centre squeeze process), right side inlet amount be 0.2mm/s, the left and right sides enter hydraulic cylinder oil pressure
For 25MPa, the fluid pressure inside pipeline is 35MPa, continues 1-3s；Inlet amount 1.5mm/s (i.e. left side pipeline on the left of third section
To centre squeeze process), right side inlet amount be 0.2mm/s, the left and right sides enter hydraulic cylinder oil pressure be 25MPa,
Fluid pressure inside pipeline is 50MPa, continues 2s；(i.e. left side pipeline squeezes 4th section of left side inlet amount 1.3mm/s to centre
Process), right side inlet amount be 0.2mm/s, the pressure that the left and right sides enters the oil of hydraulic cylinder is 25MPa, inside pipeline
Fluid pressure is 65MPa, continues 1.5s；5th section of left side inlet amount 0.2mm/s (i.e. process of the left side pipeline to centre extruding),
Right side inlet amount is 0.2mm/s, and the pressure that the left and right sides enters the oil of hydraulic cylinder is 25MPa, the fluid pressure inside pipeline
For 125MPa, continue 2s；Then pressure maintaining 2s.Technique of the invention:
Such as attached drawing 3, the specific structure of first time straight tee (ST.TEE), that is, T-type threeway molding die includes upper mold 1, and lower die 2 is right close
Seal 3, right push top 4, left sealing ring 5, left push top 6, groove 9；Lower die setting is recessed on mould bases lower inside, the surface of lower die
It is formed with a T-type groove.The identical composition circular closed loop of the groove size of upper die and lower die after molding.The laterally disposed circle of threeway
Pipe fitting, the right push top of both ends connection and left push top, are arranged right-left seal circle between push top and through-hole.The upper mold and lower die
Structure is symmetrical, and the surface of lower die is arranged in.The left push top is equipped with oil-through-hole 11, the recharging oil device phase with hydraulic press
Even.The right push top does not set oil-through-hole.Right push top and left have a haircut are equipped with circumferential recess in front, for being embedded in right sealing ring
It is sealed with left sealing ring, after push top enters groove, sealing ring is close to sealing with groove inner wall.Start hydraulic press, by it is right have a haircut to
Preceding slow feeding, to when coming into contact with initial pipe end face, continue feeding until compress；Left push top is slowly fed forward,
When to the end face for coming into contact with initial pipe, feed-disabling；The recharging oil device for starting hydraulic press, from the oil-through-hole 11 of left push top
Start logical oil.When oil spill goes out and drains inner air tube substantially at right push top, the right push top of hydraulic press slowly feeding upwards, until
When blocking the right side, no longer spillage oil of initial pipe straight line portion position, the process that logical oil is vented is completed；Upper mold is closed, and is passed through
Bolt is fixed；The supercharging device for starting hydraulic press, is pressurized liquid in pipe slowly, and blunting of attention pressurization prevents tubing from bursting.Together
When control left and right push top slowly feeding inwards, feed supplement is sufficient when making tube bulge；When tubing is bonded hydraulic expanding die type completely
After chamber, by hydraulic press release；The left and right push top of control hydraulic press is retracted；Upper mold is opened, and takes out tee tube.The above process is realized
Straight tee (ST.TEE) molding.
Mould structure and the first time for forming bend pipe threeway are essentially identical, and unique difference is that the shape of groove is different, because
This, details are not described herein.
Straight tee (ST.TEE): threeway position most thin thickness 1.16 after molding is formed, boss most thin thickness is 1.09mm.Pass through this work
Skill effectively improves the difficult point in molding.Material thickness 1.5mm boss height 0.4D (D is pipe diameter), caliber 38mm, most
Thin thickness 1.05mm.
Comparative example
--- bend pipe --- annealing --- second of molding of molding --- annealing --- for the first time using traditional blanking；
Design parameter: bend pipe: bending radius 55mm, outside most thin thickness 1.28mm after bend pipe；
Molding: the unilateral 18mm of axial supplement (tubing Instability wrinkling after feed supplement amount increases), first time briquetting pressure 70MPa,
Second of briquetting pressure 120MPa, threeway most thin thickness is 0.85mm after forming twice.Customer requirement is far not achieved.
From above-described embodiment and comparative example it is found that the product of the method for the present invention preparation meets requirement.
Claims (4)
1. a kind of preparation method of bend pipe tee tube, which is characterized in that step includes:
(1) blanking: round pipe length according to required for forming part is cut；
(2) it forms straight tee (ST.TEE): the round pipe of step (1) being directly made by T-type straight tee (ST.TEE) using interior high-pressure molding technology, is used
Round pipe is placed in T-die by hydraulic molding technique, and T-type type chamber is provided in T-die, and T-type type chamber includes phase each other
Mutually vertical cross through hole and longitudinal hole, the round pipe are placed in cross through hole, are then carried out hydro-forming and are obtained T
Type straight tee (ST.TEE) pipe；
(3) bend pipe: the one end for the T-type straight tee (ST.TEE) pipe that step (2) are obtained keeps straight tube, and the other end is carried out curved using bending machine
Song, the ratio between the bending radius of bending part and the radius of bend pipe are 1.3-1.6；Then pipe after bending is placed in shaping mould
It is squeezed, preformed part required for obtaining；
(4) it anneals: the preformed part that step (3) obtain is made annealing treatment, eliminate machining stress；
(5) it forms bend pipe threeway: the sweep tee after annealing is put into interior Belt-type tools, carry out interior high-pressure and hydraulic molding, make
It obtains part outer surface and is bonded mold cavity；
The hydro-forming of step (2) is divided into six sections of processes, and inlet amount is the process that left side pipeline is squeezed to centre on the left of first segment
It is right side pipeline for 0.4-0.6mm/s, right side inlet amount to the process that centre squeezes is 1.2-1.6mm/s, the left and right sides enters
The pressure of the oil of hydraulic cylinder is 20-30MPa, and the fluid pressure inside pipeline is 15-25MPa, continues 1-3s；On the left of second segment
Inlet amount 3.0-3.6mm/s, right side inlet amount are 0.3-0.6mm/s, and the pressure that the left and right sides enters the oil of hydraulic cylinder is 20-
30MPa, the fluid pressure inside pipeline are 25-35MPa, continue 1-3s；Inlet amount 3.0-3.5mm/s, right side on the left of third section
Inlet amount is 0.3-0.6mm/s, and the pressure that the left and right sides enters the oil of hydraulic cylinder is 20-30MPa, the liquid pressure inside pipeline
Power is 35-45MPa, continues 1-3s；4th section of left side inlet amount 2.5-3.5mm/s, right side inlet amount are 0.3-0.6mm/s, left
The pressure that right two sides enter the oil of hydraulic cylinder is 20-30MPa, and the fluid pressure inside pipeline is 45-55MPa, continues 1-3s；
5th section of left side inlet amount 2.2-3.0mm/s, right side inlet amount are 0.2-0.5mm/s, and the left and right sides enters the oil of hydraulic cylinder
Pressure be 20-30MPa, the fluid pressure inside pipeline is 55-65MPa, continues 1-3s；6th section of left side inlet amount 2.2-
3.0mm/s, right side inlet amount are 0.05-0.3mm/s, and the pressure that the left and right sides enters the oil of hydraulic cylinder is 20-30MPa, pipe
Fluid pressure inside road is 65-75MPa, continues 1-3s.
2. the preparation method of bend pipe tee tube according to claim 1, which is characterized in that step (5) interior high-pressure and hydraulic at
Type is divided into five sections of processes, and inlet amount 0.5-1.5mm/s, right side inlet amount are 0.5-1.5mm/s on the left of first segment, the left and right sides into
The pressure for entering the oil of hydraulic cylinder is 20-30MPa, and the fluid pressure inside pipeline is 15-25MPa, continues 1-3s；Second segment is left
Side inlet amount 1.5-2.3mm/s, right side inlet amount are 0.1-0.5mm/s, and the pressure that the left and right sides enters the oil of hydraulic cylinder is
20-30MPa, the fluid pressure inside pipeline are 30-35MPa, continue 1-3s；Inlet amount 1.0-2.0mm/s, the right side on the left of third section
Side inlet amount is 0.1-0.5mm/s, and the pressure that the left and right sides enters the oil of hydraulic cylinder is 20-30MPa, the liquid inside pipeline
Pressure is 45-55MPa, continues 1-3s；4th section of left side inlet amount 1.0-2.0mm/s, right side inlet amount are 0.1-0.5mm/s,
The pressure that the left and right sides enters the oil of hydraulic cylinder is 20-30MPa, and the fluid pressure inside pipeline is 60-70MPa, continues 1-
3s；5th section of left side inlet amount 0.1-0.5mm/s, right side inlet amount are 0.1-0.5mm/s, and the left and right sides enters hydraulic cylinder
The pressure of oil is 20-30MPa, and the fluid pressure inside pipeline is 120-130MPa, continues 1-3s.
3. the preparation method of bend pipe tee tube according to claim 1, which is characterized in that step (4) are annealed into temperature
Degree is the bright annealing under 950-1050 DEG C of high temperature.
4. the preparation method of bend pipe tee tube according to claim 1, which is characterized in that step (5) makes part appearance
Face paste close mold cavity after at 125-130MPa pressure maintaining 2-5s.
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| CN108397266A (en) * | 2018-04-26 | 2018-08-14 | 清华大学苏州汽车研究院（相城） | A kind of monolith honeycomb catalysts intake elbow hot gas bulging process equipment and processing technology |
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| CN106734340A (en) | 2017-05-31 |
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